Description:PARKING BRAKE ASSEMBLY FOR A VEHICLE
TECHNICAL FIELD
[0001] The present disclosure generally relates to vehicle braking systems. Further, the present disclosure particularly relates to a parking brake assembly for a vehicle.
BACKGROUND
[0002] Parking brake assemblies have long been utilized in vehicles to provide a mechanism for immobilizing vehicles during stationary conditions. Such assemblies are integral to vehicle safety, particularly on inclines or in scenarios requiring the prevention of unintended movement. Conventional systems typically rely on either manual engagement mechanisms or automated systems involving electromechanical components. Manual systems often demand significant effort from an operator, leading to operational challenges, especially in cases requiring frequent engagement and disengagement. Automated systems, while reducing manual effort, frequently depend on electrical power, presenting limitations in the event of power failures or electronic malfunctions.
[0003] Mechanical systems within parking brake assemblies frequently employ interlocking components such as toothed gears, linkages, or rods. Toothed gear arrangements commonly interact with components of the drivetrain to immobilize the vehicle. However, operational challenges arise due to wear and tear, misalignment, or improper engagement, particularly in vehicles subjected to heavy loads or uneven terrain. Such conditions can exacerbate mechanical stress and compromise the reliability of the assembly over time. The occurrence of misalignment or degradation of gear teeth often necessitates regular maintenance, adding to the operational costs and downtime.
[0004] Actuator assemblies are widely integrated into parking brake systems to enable the transmission of mechanical force necessary for engagement and disengagement. Such assemblies frequently involve cables or guide rods, which are subjected to repeated mechanical stress. Over time, components such as steel cables may experience elongation, loss of tensile strength, or inconsistent force transmission. The integrity of actuator assemblies is further impacted by environmental conditions such as temperature variations, moisture, and exposure to contaminants, all of which contribute to material degradation and reduced service life. Maintenance of actuator assemblies poses a significant challenge, requiring the replacement of worn or degraded components to assure continued operation.
[0005] Auxiliary components such as side stands are often employed in parking brake systems to facilitate additional operational modes. Side stands are typically connected to actuator assemblies or mechanical linkages to control the engagement state of the parking brake. Such components maintain a mechanical relationship with other elements of the assembly to function effectively. However, existing solutions are often characterized by increased mechanical complexity, susceptibility to wear, and difficulty in achieving synchronized operation. The presence of multiple moving parts increases the likelihood of component failure, leading to operational inefficiencies and maintenance challenges.
[0006] The integration of multiple components into parking brake systems necessitates an approach that addresses the limitations of conventional designs. Effective solutions must provide consistent and reliable engagement and disengagement of parking brake assemblies while minimizing wear and maintenance requirements. Overcoming the challenges associated with mechanical stress, misalignment, and component degradation remains a priority in enhancing the overall reliability and operational efficiency of parking brake systems.
SUMMARY
[0007] This summary is provided to introduce a selection of concepts in a simplified form that are further disclosed in the detailed description of the present disclosure. This summary is not intended to identify key or essential inventive concepts of the claimed subject matter, nor is it intended for determining the scope of the claimed subject matter.
[0008] The present disclosure provides a parking brake assembly for a vehicle comprising a pinion associated with a gearbox assembly and a toothed sector gear. The toothed sector gear transforms between an engagement mode to engage the pinion and disable vehicle movement, and a disengagement mode to disengage the pinion and enable vehicle movement. The parking brake assembly further comprises a side stand that transforms between an engage position to activate an actuator assembly to engage the toothed sector gear and a disengage position to deactivate the actuator assembly to disengage the toothed sector gear. The actuator assembly comprises a steel cable connected to the side stand and a guide rod. When the side stand is in the engage position, the steel cable is pulled to engage the toothed sector gear, and when the side stand is in the disengage position, the steel cable relaxes to disengage the toothed sector gear through the guide rod.
[0009] Moreover, the present disclosure provides an automatic tension adjustment unit associated with the steel cable. The automatic tension adjustment unit includes a spring-based tension regulator to maintain consistent tensile force within the steel cable during transitions between the engagement mode and the disengagement mode. Such an arrangement prevents excessive stress within the steel cable during operation.
[0010] Furthermore, the parking brake assembly includes a guide rod supported by multiple self-aligning bearings. Each self-aligning bearing is positioned along the guide rod to facilitate linear motion. The arrangement of self-aligning bearings enables smooth and accurate alignment of the guide rod during transitions, assuring proper engagement and disengagement of the toothed sector gear with the pinion.
[0011] Additionally, the guide rod of the parking brake assembly is associated with a mounting bracket adjustably mounted to a chassis of the vehicle. The mounting bracket secures the guide rod in alignment with the toothed sector gear, enabling stable operation during movement between engagement and disengagement modes. The adjustable mounting arrangement allows for enhanced alignment based on operational requirements.
[0012] The guide rod of the parking brake assembly is further associated with an anti-bending reinforcement rib disposed along the length. The anti-bending reinforcement rib strengthens the guide rod and prevents deformation during operation, particularly under high stress or load conditions. Such reinforcement contributes to the durability and reliability of the guide rod over extended periods.
[0013] The toothed sector gear of the parking brake assembly comprises multiple gear teeth, wherein each gear tooth is associated with a chamfered edge. The chamfered edge facilitates smooth meshing with the pinion during the engagement mode, reducing wear and improving operational consistency. The chamfering of gear teeth contributes to reduced resistance and improved efficiency during transitions.
[0014] Furthermore, the side stand of the parking brake assembly is linked with an auxiliary electric actuator via a pivoting lever. The pivoting lever facilitates deployment and retraction of the side stand in response to a control signal. Such a configuration enables automated operation of the side stand, improving convenience and reducing manual intervention for the user.
[0015] The guide rod of the parking brake assembly is configured to receive an LED strip along the length. Such an LED strip provides illumination or visual indicators, enhancing visibility during low-light conditions. The integration of the LED strip within the guide rod enables multi-functional usage and contributes to operational safety.
[0016] The parking brake assembly includes a locking unit associated with the steel cable, wherein the locking unit comprises a rotary cam unit. The rotary cam unit secures the steel cable in a fixed position during the disengagement mode, preventing unintended relaxation of the steel cable.
[0017] Additionally, the pinion of the parking brake assembly is associated with an inclinometer to detect the gradient of a terrain and a control unit to modulate operational force to the toothed sector gear based on the detected gradient. Such components enable the parking brake assembly to adapt to varying terrain conditions and improve operational safety.
[0018] The parking brake assembly further comprises a stepper motor to adjust the angular position of the toothed sector gear based on the detected gradient. The stepper motor enables positioning of the toothed sector gear to account for changes in terrain inclination, contributing to enhanced performance and safety.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The summary above, as well as the following detailed description of illustrative embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the present disclosure, exemplary constructions of the disclosure are shown in the drawings. However, the present disclosure is not limited to specific methods and instrumentalities disclosed herein.
[0020] Embodiments of the present disclosure will now be described, by way of example only, with reference to the following diagrams.
[0021] FIG. 1 (FIG. 1A to FIG. 1B) illustrates a parking brake assembly for a vehicle, in accordance with various implementations of the present disclosure;
[0022] FIG. 2 illustrates a functional flow diagram of a parking brake assembly for a vehicle, in accordance with embodiments of the present disclosure.
[0023] FIG. 3A illustrates the engagement of the toothed sector gear with the pinion, demonstrating the mechanical interaction that restricts the rotational movement of the pinion to immobilize the vehicle.
[0024] FIG. 3B illustrates the disengagement of the toothed sector gear from the pinion, enabling rotational movement of the pinion and thereby permitting vehicle motion.
[0025]
DETAILED DESCRIPTION OF EMBODIMENTS
[0026] The following detailed description illustrates embodiments of the present disclosure and ways in which they can be implemented. Although some modes of carrying out the present disclosure have been disclosed, those skilled in the art would recognize that other embodiments for carrying out or practicing the present disclosure are also possible.
[0027] As used herein, the term "parking brake assembly" refers to a system designed to prevent unintended movement of a vehicle by engaging a mechanism that restricts the motion of specific drivetrain components. Such a system includes multiple components, such as gears, rods, actuators, and linkages, which work together to transition the vehicle between a stationary and a movable state. Parking brake assemblies are used in a variety of vehicle types, including two-wheelers, four-wheelers, and heavy vehicles, to enhance safety during stationary conditions or while parked on inclines. Examples of parking brake assemblies include drum brake systems, disc brake systems, or mechanical locking systems involving a gear and pinion arrangement. In drum brake systems, a cable typically pulls a lever that engages the brake shoes against a drum. In disc brake systems, a caliper mechanism applies pressure on the brake disc to restrict motion.
[0028] As used herein, the term "pinion" refers to a small, toothed cylindrical gear that engages with a larger gear or rack to transmit motion or force. A pinion is generally a part of a gear assembly and is designed to mesh with another gear, such as a sector gear or a rack, to create a mechanical advantage. Pinions are used in various mechanical systems, including steering systems, braking mechanisms, and gearboxes, to facilitate controlled movement or force transmission. The pinions may include spur gears, helical gears, and bevel gears. Spur pinions have straight teeth parallel to the axis, while helical pinions have angled teeth to provide smoother engagement.
[0029] As used herein, the term "toothed sector gear" refers to a partial gear with a limited arc of teeth designed to engage with another gear, such as a pinion, to transmit force or motion. A toothed sector gear is often used in mechanical systems requiring controlled movement within a limited range. The toothed sector gears may include quarter-circle gears, half-circle gears, or custom-shaped gears designed for specific applications.
[0030] As used herein, the term "engagement mode" refers to the state of a mechanical system in which components, such as gears or linkages, are actively interlocked to restrict or control motion. In the context of parking brake assemblies, engagement mode refers to the state where the toothed sector gear meshes with the pinion, preventing the rotation of the pinion and thereby disabling movement of the vehicle. Engagement mode is achieved through the operation of an actuator assembly, which applies force to position the components in a locked state. The engagement mechanisms may include mechanical locks, electromagnetic actuators, or hydraulic systems that secure components in a fixed position.
[0031] As used herein, the term "disengagement mode" refers to the state of a mechanical system in which interlocked components are separated, allowing motion or movement. In the context of parking brake assemblies, disengagement mode refers to the state where the toothed sector gear is moved away from the pinion, enabling the rotation of the pinion and thereby allowing movement of the vehicle. Disengagement mode is achieved by deactivating the actuator assembly, which removes the force maintaining the interlocked position of the components.
[0032] As used herein, the term "side stand" refers to a mechanical support structure attached to a vehicle, typically a two-wheeler, to enable the vehicle to remain upright when stationary. A side stand is generally pivoted to the vehicle frame and can transition between a deployed position, where the stand supports the vehicle, and a retracted position, where the stand is folded away. In parking brake assemblies, a side stand is often linked to an actuator mechanism to enable transitions between engagement and disengagement modes of the braking system.
[0033] As used herein, the term "actuator assembly" refers to a mechanical or electromechanical device designed to control the movement or positioning of a system component. In parking brake assemblies, an actuator assembly includes components such as cables, guide rods, and tension regulators that facilitate the transition of a braking system between engagement and disengagement modes. Examples of actuator assemblies include mechanical actuators using cables or rods, hydraulic actuators using pressurized fluid, and electronic actuators using stepper motors or solenoids.
[0034] As used herein, the term "steel cable" refers to a flexible wire rope composed of multiple strands of steel wires twisted together to provide high tensile strength and durability. In parking brake assemblies, a steel cable is used to transmit force from the actuator assembly to components such as a toothed sector gear or guide rod. Examples of steel cables include galvanized steel cables, stainless steel cables, and coated steel cables designed to resist corrosion and mechanical wear. Steel cables are commonly used in braking systems, lifting mechanisms, and tensioning devices due to their strength, flexibility, and resistance to environmental factors.
[0035] As used herein, the term "guide rod" refers to a linear, elongated mechanical element used to guide or support the movement of components within a mechanical system. In parking brake assemblies, a guide rod facilitates the linear movement of an actuator assembly or other connected components. Examples of guide rods include cylindrical rods, hollow rods, and rods with reinforced cores to resist bending or deformation. Guide rods are often supported by bearings or brackets to enable smooth motion and maintain alignment with other system components.
[0036] As used herein, the term "automatic tension adjustment unit" refers to a mechanical device designed to regulate the tension in a flexible element, such as a steel cable, to affirm consistent performance and prevent mechanical stress. In parking brake assemblies, an automatic tension adjustment unit uses a spring-based tension regulator to maintain uniform tensile force within the steel cable during operation.
[0037] As used herein, the term "locking unit" refers to a mechanism designed to secure a component in a fixed position to prevent unintended movement or relaxation. In parking brake assemblies, a locking unit comprises components such as a rotary cam unit to secure a steel cable during disengagement mode. The locking units may be selected from cam locks, pin locks, and friction-based locks, which are used in various applications to enhance stability and control.
[0038] As used herein, the term "inclinometer" refers to a device used to measure the angle of inclination or gradient of a surface relative to a reference plane, such as the horizontal plane. In parking brake assemblies, an inclinometer detects the gradient of a terrain and provides data to adjust the operation of braking system accordingly. The inclinometers may be selected from bubble inclinometers, digital inclinometers, and gyroscopic inclinometers used in applications such as construction, automotive systems, and navigation equipment.
[0039] As used herein, the term "stepper motor" refers to an electromechanical device that converts electrical pulses into mechanical movement, allowing accurate control of angular or linear positioning. In parking brake assemblies, a stepper motor adjusts the angular position of a toothed sector gear based on the gradient data provided by an inclinometer.
[0040] FIG. 1 (FIG. 1A to FIG. 1B) illustrates a parking brake assembly (100) for a vehicle, in accordance with various implementations of the present disclosure. The parking brake assembly (100) for a vehicle comprises a pinion (102) associated with a gearbox assembly. The pinion (102) is a cylindrical gear element with a series of evenly spaced teeth along its circumference, allowing engagement with the toothed sector gear (104). The pinion (102) transmits mechanical force during the operation of the parking brake assembly (100) to immobilize the vehicle when engaged. The pinion (102) is secured to the gearbox assembly through a connection that maintains alignment with the drivetrain components, enabling consistent interaction with the toothed sector gear (104). The pinion (102) is constructed using materials such as hardened steel or alloy composites, selected for their resistance to wear and mechanical stresses. The dimensions and geometry of the teeth of pinion (102), including factors such as pitch and pressure angle, are aligned with those of the toothed sector gear (104) to assure smooth engagement and disengagement.
[0041] In an embodiment, the parking brake assembly (100) further includes a toothed sector gear (104), which is designed to transition between an engagement mode and a disengagement mode. The toothed sector gear (104) is a segmental gear with a defined arc of teeth that interact with the pinion (102) to control vehicle movement. In the engagement mode, the toothed sector gear (104) meshes with the pinion (102), effectively preventing the rotation of the pinion (102) and immobilizing the vehicle. Transitioning to the disengagement mode involves displacing the toothed sector gear (104) from the pinion (102), enabling the pinion (102) to rotate freely and allowing the vehicle to move. The movement of the toothed sector gear (104) is facilitated by an actuator mechanism, which applies or removes force to position the gear appropriately. The toothed sector gear (104) is fabricated from durable materials such as alloy steel or aluminum composites to enable long-term performance and resistance to wear. The teeth of the toothed sector gear (104) are designed with specific profiles and chamfered edges to enable smooth interaction with the pinion (102), reducing mechanical resistance during operation. The alignment of the toothed sector gear (104) with the pinion (102) is maintained using guide components, affirming reliable operation in various conditions, including changes in vehicle load and environmental factors. The angular range of motion of the toothed sector gear (104) is calibrated to provide sufficient clearance in the disengagement mode while maintaining secure engagement during the locked position.
[0042] In an embodiment, the side stand (106) is a mechanical support structure connected to the vehicle frame that transitions between two distinct positions, namely an engage position and a disengage position. FIG. 1A illustrates the engage position of the side stand (106) to activate an actuator assembly (108), transforming the toothed sector gear (104) into the engagement mode. In this mode, the motion of the vehicle is restricted. FIG. 1B illustrates the disengage position of the side stand (106) to deactivate the actuator assembly (108), allowing the toothed sector gear (104) to transition into the disengagement mode. In this mode, vehicle movement is enabled. The side stand (106) is mechanically connected to the actuator assembly (108) through a pivoting mechanism, which translates the movement of the side stand (106) into a corresponding state of engagement or disengagement within the braking system. The movement of the side stand (106) may be achieved manually by an operator or by auxiliary actuators to make sure ease of operation. The mechanical connection between the side stand (106) and the actuator assembly (108) facilitates consistent and reliable operation of the parking brake assembly (100) under varied conditions..
[0043] In an embodiment, a guide rod (112) is an elongated mechanical element to facilitate the linear movement of the actuator assembly (108). The guide rod (112) provides support and alignment for a steel cable

(110) during transitions between the engagement and disengagement modes of the braking system. The guide rod (112) is structurally reinforced to maintain integrity under mechanical stress and environmental factors such as vibration, temperature fluctuations, and external forces. Multiple self-aligning bearings may be incorporated along the length of the guide rod (112) to enable smooth and controlled movement. The guide rod (112) is adjustably mounted to the vehicle chassis using brackets or clamps, allowing alignment with the toothed sector gear (104). The alignment of the guide rod (112) enables accurate transmission of force from the actuator assembly (108) to the toothed sector gear (104), thereby enabling effective engagement and disengagement of the parking brake assembly (100).
[0044] In an embodiment, the actuator assembly (108) comprises the steel cable (110) mechanically connected to the side stand (106) and the guide rod (112). The steel cable (110)is a flexible, high-strength wire rope designed to transmit force generated by the movement of the side stand (106) to the toothed sector gear (104). When the side stand (106) is in the engage position, the steel cable (110) is pulled through the guide rod (112) to transform the toothed sector gear (104) into the engagement mode, thereby restricting vehicle movement. Conversely, when the side stand (106) is in the disengage position, the steel cable (110) relaxes from the pulled state, allowing the toothed sector gear (104) to transition into the disengagement mode, thereby enabling vehicle movement. The steel cable (110) is tensioned through an automatic tension adjustment mechanism, which includes a spring-based regulator to maintain consistent tensile force and prevent overstretching or slack during repeated operations. The interaction between the steel cable, guide rod (112), and actuator assembly (108) makes sure reliable operation of the parking brake assembly (100) under varying load and environmental conditions. The materials and construction of the steel cable (110) provide durability and resistance to wear, corrosion, and external factors.
[0045] In an embodiment, the steel cable (110)may be associated with an automatic tension adjustment unit comprising a spring-based tension regulator. The automatic tension adjustment unit is designed to maintain consistent tensile force within the steel cable (110) during transitions between the engagement mode and the disengagement mode. The spring-based tension regulator compensates for variations in cable elongation caused by repetitive use or mechanical stress, preventing slack or stress or excessive tension within the steel cable (110) . The tension regulator employs a spring mechanism that automatically adjusts the force applied to the steel cable (110) . The spring-based tension regulator is constructed using durable materials such as high-carbon steel or corrosion-resistant alloys to withstand environmental factors such as moisture, temperature fluctuations, and mechanical wear. The tension adjustment mechanism is positioned within the actuator assembly (108), facilitating interaction with the side stand (106) and the guide rod (112).
[0046] In an embodiment, each self-aligning bearing positioned along the guide rod (112) in the parking brake assembly (100) facilitates smooth and reliable linear motion of the guide rod (112). The along placement of the self-aligning bearings ensures even distribution of load across the guide rod (112), reducing localized stress and wear while maintaining structural stability during operation. Such placement minimizes the risk of misalignment or binding of the guide rod (112), even under dynamic loads or vibrations, enhancing the reliability of the actuator assembly (108). The self-aligning bearings compensate for minor angular deviations or irregularities in the guide rod (112), maintaining consistent contact and smooth movement. The placement of the self-aligning bearings along the guide rod (112) optimizes force transmission from the steel cable (110) connected to the side stand (106) to the toothed sector gear (104), enabling efficient transformation between engagement and disengagement modes.
[0047] In an embodiment, the guide rod (112) may be supported by multiple self-aligning bearings positioned along the length. Each self-aligning bearing is designed to facilitate linear motion of the guide rod (112) by minimizing resistance and assuring alignment with other components, such as the toothed sector gear (104). The self-aligning bearings are constructed with spherical inner surfaces that allow angular adjustments, accommodating minor misalignments caused by mechanical vibrations or load shifts. The bearings are made from materials such as high-grade steel or composite polymers to provide durability and resistance to wear under continuous use. The self-aligning bearings are mounted within housings affixed to the vehicle chassis.
[0048] In an embodiment, the guide rod (112) may be associated with a mounting bracket adjustably affixed to the chassis of the vehicle. The mounting bracket secures the guide rod (112) in alignment with the toothed sector gear (104), enabling proper interaction between the components during transitions. The mounting bracket incorporates adjustment features, such as slots or threaded fasteners, enabling positioning of the guide rod (112) based on specific operational requirements. The bracket is fabricated from materials such as reinforced steel or lightweight alloys, providing strength and stability under mechanical stress. The adjustable design of the mounting bracket facilitates easy installation and maintenance, allowing for alignment corrections over the service life of the parking brake assembly (100).
[0049] In an embodiment, the mounting bracket adjustably mounted to the chassis of the vehicle provides flexibility and precision in aligning the guide rod (112) with the toothed sector gear (104). The adjustable mounting allows the position of the guide rod (112) to be fine-tuned, enabling accurate alignment with the motion path of the toothed sector gear (104) for optimal force transmission. Such configuration accommodates manufacturing tolerances or variations in component placement, preventing misalignment that could compromise the functionality of the parking brake assembly (100). The adjustability of the mounting bracket also facilitates easy installation and maintenance, enabling quick corrections or replacements without requiring extensive disassembly. By securing the guide rod (112) in the correct orientation, the adjustable mounting minimizes lateral forces and stress on the guide rod (112) and associated components, enhancing their durability.
[0050] In an embodiment, the guide rod (112) may be associated with an anti-bending reinforcement rib that is disposed of along the length. The anti-bending reinforcement rib strengthens the guide rod (112), preventing deformation or buckling under mechanical loads or external forces. The reinforcement rib is integrated into the structure of guide rod (112) and is constructed from materials such as carbon fiber, alloy steel, or other high-strength composites to provide enhanced rigidity. The rib design may feature a series of parallel or helical ribs that distribute mechanical stress evenly along the guide rod (112). The anti-bending reinforcement rib is particularly beneficial in maintaining the linear motion of the guide rod (112), especially in high-vibration environments or under heavy braking forces.
[0051] In an embodiment, the toothed sector gear (104) may comprise multiple gear teeth, with each gear tooth incorporating a chamfered edge. The chamfered edge is designed to facilitate smooth meshing with the pinion (102) during the engagement mode, reducing wear and minimizing resistance. The chamfered edge is achieved by machining or casting processes that create an angled or rounded surface along the leading edges of the gear teeth. Materials used for the toothed sector gear (104) include high-strength steel alloys or wear-resistant composites. The geometry of the gear teeth and the chamfered edges allows for effective force transmission between the toothed sector gear (104) and the pinion (102), contributing to the reliable operation of the parking brake assembly (100). The toothed sector gear (104) is further treated with surface coatings or heat treatments to enhance resistance to corrosion and mechanical fatigue.
[0052] In an embodiment, the side stand (106) may be linked with an auxiliary electric actuator via a pivoting lever, wherein the pivoting lever facilitates deployment and retraction of the side stand (106) in response to a control signal. The auxiliary electric actuator includes a motorized unit that translates electrical signals into mechanical motion, enabling automated operation of the side stand (106). The pivoting lever acts as a mechanical intermediary, translating the motion generated by the actuator into rotational movement required for deploying or retracting the side stand (106). The actuator may be controlled by a control unit that processes input signals, such as those from a user interface, proximity sensor, or vehicle state detection system. The control signal activates the electric actuator, which applies force to the pivoting lever, resulting in a smooth transition of the side stand (106) between deployed and retracted positions. The linkage between the pivoting lever and the side stand (106) is configured to minimize mechanical stress and maintain alignment during operation. The design affirms that the side stand (106) can be securely locked in both the deployed and retracted positions, preventing unintended movement. Examples of electric actuators include servo motors, linear actuators, or solenoid-based actuators, which provide reliable and consistent performance.
[0053] In an embodiment, the guide rod (112) may be configured to receive an LED strip along the length of the guide rod (112). The LED strip provides illumination for visual assistance in low-light conditions, particularly during engagement and disengagement of the parking brake assembly (100). The LED strip is housed within a recessed channel or mounted securely onto the surface of the guide rod (112) to enable protection from physical damage and environmental exposure. The LED strip operates on a low-voltage electrical supply and may include a flexible PCB substrate to conform to the shape of the guide rod (112). Electrical connectivity is achieved through insulated wiring routed along the guide rod (112) to a power source, such as the battery of vehicle. A switch or control circuit allows selective activation of the LED strip, which may be triggered manually by the user or automatically based on sensor inputs detecting ambient light levels. The surface of guide rod (112) is designed to accommodate the LED strip without hindering the movement of associated components, such as the steel cable (110) or self-aligning bearings. The LED strip may include multiple light-emitting diodes spaced evenly to provide uniform illumination along the length of the guide rod (112). The use of high-lumen LEDs provides visibility while consuming minimal power, reducing the overall energy demand on the electrical system of vehicle.
[0054] In an embodiment, the parking brake assembly (100) may further comprise a locking unit associated with the steel cable, wherein the locking unit comprises a rotary cam unit. The rotary cam unit secures the steel cable (110) in a fixed position during the disengagement mode, preventing unintended relaxation of the cable. The rotary cam unit includes a cam mechanism with a rotating surface that applies a clamping force to the steel cable, locking rotary cam unit in place. The locking unit is designed to maintain consistent tension within the steel cable. The locking unit may include a spring-loaded mechanism to provide constant clamping force, compensating for variations in cable tension due to environmental or operational factors. The rotary cam unit is housed within a protective enclosure for shielding from contaminants, such as dirt, moisture, or debris, that may affect functionality. The locking unit operates in coordination with other components of the parking brake assembly (100), such as the actuator assembly (108), to enable transitions between engagement and disengagement modes. Examples of rotary cam mechanisms include eccentrically mounted cams or cam wheels that interact with a fixed clamping surface to achieve a locking effect. The locking unit may also incorporate a manual override feature to allow user intervention in case of actuator malfunction or emergency situations.
[0055] In an embodiment, the pinion (102) may be associated with an inclinometer to detect the gradient of a terrain and a control unit to modulate operational force to the toothed sector gear (104) based on the detected gradient. The inclinometer is a sensor that measures the angle of inclination or slope of the terrain relative to a horizontal plane. The inclinometer is positioned within the parking brake assembly (100) to provide accurate gradient data, which is processed by the control unit. The control unit adjusts the force applied to the toothed sector gear (104) during engagement mode to account for the detected gradient, assuring optimal braking performance. The inclinometer may use technologies such as MEMS-based accelerometers, liquid-filled tilt sensors, or gyroscopic sensors to detect angular changes. The control unit processes data from the inclinometer in real-time and adjusts the mechanical engagement of the toothed sector gear (104) with the pinion (102) to provide a tailored braking response based on terrain conditions. The inclinometer and control unit operate in conjunction to improve the safety and reliability of the parking brake assembly (100) on inclines or uneven terrain.
[0056] In an embodiment, the parking brake assembly (100) may further comprise a stepper motor to adjust the angular position of the toothed sector gear (104) based on the detected gradient. The stepper motor is an electromechanical device that converts electrical pulses into incremental rotational movements, allowing control of the position of toothed sector gear (104). The stepper motor operates in response to signals from the control unit, which processes gradient data from the inclinometer to determine the required angular adjustment. The stepper motor is mechanically linked to the toothed sector gear (104) through a gear train or direct coupling. The incremental movement capability of stepper motor allows fine adjustments to the position of toothed sector gear (104), optimizing engagement with the pinion (102) for braking on inclined or uneven terrain. The stepper motor may include features such as position feedback sensors or micro stepping control to enhance precision and reliability. The integration of the stepper motor with the parking brake assembly (100) enables dynamic adjustments to the braking mechanism, enhancing the adaptability to varying terrain conditions. Examples of stepper motors include hybrid stepper motors, permanent magnet stepper motors, and variable reluctance stepper motors, all of which are suitable for applications requiring positional control.
[0057] The parking brake assembly (100) allows effective immobilization of a vehicle by utilizing a pinion (102) and a toothed sector gear (104). The transformation of the toothed sector gear (104) between engagement and disengagement modes enables control of vehicle motion. The engagement mode locks the drivetrain by meshing the toothed sector gear (104) with the pinion (102), thereby preventing unintended movement. The disengagement mode disengages the toothed sector gear (104) from the pinion (102), restoring mobility.
[0058] The steel cable (110) within the actuator assembly (108) facilitates the mechanical transmission of force between the side stand (106) and the toothed sector gear (104). The tensile strength and flexibility of steel cable (110) enable consistent force transfer, affirming reliable operation of the parking brake assembly (100). The automatic tension adjustment unit with a spring-based tension regulator prevents stress and maintains consistent tension in the steel cable (110) during operational transitions.
[0059] The guide rod (112) provides a stable pathway for the steel cable (110) and actuator assembly (108). The linear motion of guide rod (112) is facilitated by multiple self-aligning bearings, which reduce friction and enable smooth operation. The mounting bracket associated with the guide rod (112) allows secure attachment to the vehicle chassis while maintaining proper alignment with the toothed sector gear (104). The anti-bending reinforcement rib along the guide rod (112) increases structural integrity, reducing the risk of deformation during operation under varying loads.
[0060] The toothed sector gear (104) includes multiple gear teeth with chamfered edges, which promote smooth meshing with the pinion (102). The chamfered design reduces friction, minimizes wear, and enables consistent engagement, even under high-load conditions. The side stand (106), linked to an auxiliary electric actuator via a pivoting lever, enables automated deployment and retraction based on control signals.
[0061] The ability of guide rod (112) to accommodate an LED strip provides enhanced visibility in low-light conditions. The LED strip mounted along the guide rod (112) improves operational safety and allows users to monitor the status of brake assembly visually. The locking unit, comprising a rotary cam unit, secures the steel cable (110) in a fixed position during disengagement mode, preventing unintended relaxation and enabling stable operation.
[0062] The pinion (102), associated with an inclinometer and control unit, dynamically adjusts operational force based on terrain gradient. The inclinometer detects the terrain slope, and the control unit modulates force applied to the toothed sector gear (104) accordingly, enhancing braking reliability on inclines. Additionally, the inclusion of a stepper motor enables angular adjustments to the toothed sector gear (104) in response to gradient data, improving the adaptability of parking brake assembly to varying terrain conditions.
[0063] FIG. 2 illustrates a functional flow diagram of a parking brake assembly (100) for a vehicle, in accordance with embodiments of the present disclosure. The diagram begins with a pinion (102) associated with a gearbox assembly, which interacts with a toothed sector gear (104) to control the movement of the vehicle. The side stand (106) transitions between an engage position and a disengage position to control the state of the parking brake assembly (100). In the engage position, the side stand (106) activates the actuator assembly (108), resulting in the steel cable (110) being pulled through the guide rod (112). This action transforms the toothed sector gear (104) into the engagement mode, causing the toothed sector gear (104) to mesh with the pinion (102) and disable the movement of the vehicle. Conversely, in the disengage position, the side stand (106) deactivates the actuator assembly (108), which relaxes the steel cable. The relaxation of the steel cable (110) transitions the toothed sector gear (104) into the disengagement mode, disengaging the toothed sector gear (104) from the pinion (102) and enabling vehicle movement. The guide rod (112) facilitates the smooth operation of the steel cable (110) during these transitions, enabling consistent and reliable engagement or disengagement of the toothed sector gear (104) based on the position of the side stand (106).
[0064] FIG. 3A illustrates the engagement of toothed sector gear (104) with pinion (102), demonstrating the mechanical interaction that restricts the rotational movement of the pinion (102) to immobilize the vehicle. The toothed sector gear (104) aligns with the evenly spaced teeth of the pinion (102) through an optimized geometry of the teeth, including specific profiles and engagement angles, facilitating smooth locking and unlocking transitions. The toothed sector gear (104) and the pinion (102) are constructed from durable materials, such as hardened steel or high-strength alloys, capable of withstanding operational stresses and environmental factors. Other components of the parking brake assembly, including the actuator assembly (108), the side stand (106), the guide rod (112) (112), and the steel cable (110), are not depicted in FIG. 3A for clarity.
[0065] FIG. 3B illustrates the disengagement of the toothed sector gear (104) from the pinion (102), enabling rotational movement of the pinion (102) and thereby permitting vehicle motion. In this state, the toothed sector gear (104) is positioned away from the teeth of the pinion (102), ensuring that no mechanical interference occurs, allowing the drivetrain components connected to the pinion (102) to rotate freely. The transition to the disengaged state is facilitated by the actuator assembly, which transmits force through the guide rod (112) (112) and steel cable (110) to reposition the toothed sector gear (104). The disengaged state represents the operational mode of the parking brake assembly (100), where the absence of engagement between the toothed sector gear (104) and the pinion (102) allows unrestricted movement of the vehicle, highlighting the effective mechanical design of the assembly.
[0066] The foregoing description of embodiments and examples has been presented for purposes of illustration and description. It is not intended to be exhaustive or limiting to the forms described. Numerous modifications are possible in light of the above teachings. Some of those modifications have been discussed and others will be understood by those skilled in the art. The embodiments were chosen and described for illustration of various embodiments. The scope is, of course, not limited to the examples or embodiments set forth herein, but can be employed in any number of applications and equivalent devices by those of ordinary skill in the art. Rather it is hereby intended the scope be defined by the claims appended hereto. Additionally, the features of various implementing embodiments may be combined to form further embodiments

CLAIMS
What is claimed is:
1. A parking brake assembly (100) for a vehicle, comprising:
a pinion (102) associated with a gearbox assembly;
a toothed sector gear (104) that transforms between:
an engagement mode to engage the toothed sector gear (104) with the pinion (102) to disable movement of the vehicle; and
a disengagement mode to disengage the toothed sector gear (104) with the pinion (102) to enable movement of the vehicle;
a side stand (106) that transforms between:
an engage position to activate an actuator assembly (108) to transform the toothed sector gear (104) into the engagement mode; and
a disengage position to de-activate the activated actuator assembly (108) to transform the toothed sector gear (104) into the disengagement mode;
an actuator assembly (108) comprises:
a steel cable (110) connected to the side stand (106), wherein when the side stand (106) is in the engage position, the steel cable (110) is pulled to transform the toothed sector gear (104) into the engagement mode through the guide rod (112), and wherein when the side stand (106) is in the disengage position, the steel cable (110) is relaxed from a pulled state to transform the toothed sector gear (104) into the disengagement mode through a guide rod (112).
2. The parking brake assembly as claimed in claim 1, wherein the steel cable (110) is associated with an automatic tension adjustment unit comprising a spring-based tension regulator to maintain consistent tensile force within the steel cable (110) during transition between the engagement mode and the disengagement mode and prevents stress within the steel cable.
3. The parking brake assembly as claimed in claim 1, wherein the guide rod (112)is supported by the multiple self-aligning bearings, wherein each self-aligning bearing is positioned along the guide rod (112) to facilitate linear motion of the guide rod (112).
4. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is associated with a mounting bracket that is adjustably mounted to a chassis of the vehicle, wherein the mounting bracket is configured to secure the guide rod (112) in alignment with the toothed sector gear (104).
5. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is associated with an anti-bending reinforcement rib disposed of the guide rod (112).
6. The parking brake assembly as claimed in claim 1, wherein the toothed sector gear (104) comprises the multiple gear teeth, wherein each gear tooth is associated with a chamfered edge to enable smooth meshing with the pinion (102) in the engagement mode.
7. The parking brake assembly as claimed in claim 1, wherein the side stand (106) is linked with an auxiliary electric actuator via a pivoting lever, wherein the pivoting lever facilitates deployment and retraction of the side stand (106) in response to a control signal.
8. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is configured to receive an LED strip along the length of the guide rod (112).
9. The parking brake assembly as claimed in claim 1, further comprising a locking unit associated with the steel cable, wherein the locking unit comprises a rotary cam unit that is configured to secure the steel cable (110) in a fixed position during the disengagement mode and prevents unintended cable relaxation.
10. The parking brake assembly as claimed in claim 1, wherein the pinion (102) is associated with:
an inclinometer to detect the gradient of a terrain; and
a control unit to modulate operational force to the toothed sector gear (104) based on the detected gradient.
11. The parking brake assembly as claimed in claim 10, further comprising a stepper motor to adjust the angular position of the toothed sector gear (104) based on the detected gradient.
 

ABSTRACT
Disclosed is a parking brake assembly for a vehicle. The parking brake assembly comprises a pinion associated with a gearbox assembly, and a toothed sector gear that transforms between an engagement mode to engage the toothed sector gear with the pinion to disable movement of the vehicle, and a disengagement mode to disengage the toothed sector gear with the pinion to enable movement of the vehicle. The parking brake assembly further comprises a side stand that transforms between an engage position to activate an actuator assembly to transform the toothed sector gear into the engagement mode, and a disengage position to deactivate the actuator assembly to transform the toothed sector gear into the disengagement mode. The actuator assembly includes a steel cable connected to the side stand and a guide rod, wherein the steel cable facilitates transformation of the toothed sector gear between the engagement and disengagement modes.

, C , Claims:CLAIMS
What is claimed is:
1. A parking brake assembly (100) for a vehicle, comprising:
a pinion (102) associated with a gearbox assembly;
a toothed sector gear (104) that transforms between:
an engagement mode to engage the toothed sector gear (104) with the pinion (102) to disable movement of the vehicle; and
a disengagement mode to disengage the toothed sector gear (104) with the pinion (102) to enable movement of the vehicle;
a side stand (106) that transforms between:
an engage position to activate an actuator assembly (108) to transform the toothed sector gear (104) into the engagement mode; and
a disengage position to de-activate the activated actuator assembly (108) to transform the toothed sector gear (104) into the disengagement mode;
an actuator assembly (108) comprises:
a steel cable (110) connected to the side stand (106), wherein when the side stand (106) is in the engage position, the steel cable (110) is pulled to transform the toothed sector gear (104) into the engagement mode through the guide rod (112), and wherein when the side stand (106) is in the disengage position, the steel cable (110) is relaxed from a pulled state to transform the toothed sector gear (104) into the disengagement mode through a guide rod (112).
2. The parking brake assembly as claimed in claim 1, wherein the steel cable (110) is associated with an automatic tension adjustment unit comprising a spring-based tension regulator to maintain consistent tensile force within the steel cable (110) during transition between the engagement mode and the disengagement mode and prevents stress within the steel cable.
3. The parking brake assembly as claimed in claim 1, wherein the guide rod (112)is supported by the multiple self-aligning bearings, wherein each self-aligning bearing is positioned along the guide rod (112) to facilitate linear motion of the guide rod (112).
4. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is associated with a mounting bracket that is adjustably mounted to a chassis of the vehicle, wherein the mounting bracket is configured to secure the guide rod (112) in alignment with the toothed sector gear (104).
5. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is associated with an anti-bending reinforcement rib disposed of the guide rod (112).
6. The parking brake assembly as claimed in claim 1, wherein the toothed sector gear (104) comprises the multiple gear teeth, wherein each gear tooth is associated with a chamfered edge to enable smooth meshing with the pinion (102) in the engagement mode.
7. The parking brake assembly as claimed in claim 1, wherein the side stand (106) is linked with an auxiliary electric actuator via a pivoting lever, wherein the pivoting lever facilitates deployment and retraction of the side stand (106) in response to a control signal.
8. The parking brake assembly as claimed in claim 1, wherein the guide rod (112) is configured to receive an LED strip along the length of the guide rod (112).
9. The parking brake assembly as claimed in claim 1, further comprising a locking unit associated with the steel cable, wherein the locking unit comprises a rotary cam unit that is configured to secure the steel cable (110) in a fixed position during the disengagement mode and prevents unintended cable relaxation.
10. The parking brake assembly as claimed in claim 1, wherein the pinion (102) is associated with:
an inclinometer to detect the gradient of a terrain; and
a control unit to modulate operational force to the toothed sector gear (104) based on the detected gradient.
11. The parking brake assembly as claimed in claim 10, further comprising a stepper motor to adjust the angular position of the toothed sector gear (104) based on the detected gradient.