Description:PREAMBLE TO THE DESCRIPTION:
[0001] The following specification particularly describes the invention and the manner in which it is to be performed:

DESCRIPTION OF THE INVENTION
Technical field of the invention
[0002] The present invention discloses a device for combined braking system. The invention particularly relates to a wedge braking system for a two wheeler application, wherein the device activates the front and the rear brakes of a vehicle simultaneously resulting in better braking system.
Background of the invention
[0003] In today’s world considering the safety of the vehicle and rider/driver several braking systems have been developed for efficient braking of vehicles. Among the various braking system such as synchronized braking system, reactive combined braking system, combination/combi braking system (CBS) etc., the CBS is one of the trending braking system these days. In the combined braking system, the system fitted in the vehicles activates the rear brake and front brake at the same time when one of the rear brake lever is depressed by the rider.
[0004] Currently the systems or devices developed to achieve combined braking system are very complex, ineffective, less durable, skid while braking and there is possibility of wheel locking, during the operation. The working mechanism and the complete set up are very complex, for example in one of the present system the hydraulic systems are used, which may result in high cost.
[0005] The Patent Application No. US7252345B2 titled “Brake system for a motorcycle” discloses a combined braking system in which communicative connection a master cylinder and a brake caliper is cut off by an electromagnetic on-off valve, and hydraulic pressure, corresponding to driving conditions and a braking operation, is generated by an electrically-operated actuator of a hydraulic pressure modulator. Hydraulic pressure of the hydraulic pressure modulator operates on the brake caliper, whereas a psuedo-reaction force which has been generated by a reaction force modulator operates on the master cylinder. The reaction force modulator is configured to include: a fluid chamber for receiving hydraulic fluid which has flowed therein from the master cylinder; a piston to constitute a wall of the fluid chamber; and a metal-made coil spring and a deformed plastic resin spring, both of which apply a force to the piston. The braking system provides a braking operation having a smooth feeling which is similar to that given by a direct-operation-type brake system.
[0006] Hence, there is a need for providing a device for combined braking system which has a simple mechanism providing effectiveness in braking, durability, better braking feel, anti-skid braking, eliminating wheel locking and is cost effective.
Summary of the invention:
[0007] The present invention overcomes the drawbacks of the prior art by disclosing a device for wedge braking system with multiple wedges, wherein the device comprises of a first slider housing, wherein the housing includes a central opening, plurality of wedges, the primary wedge and the secondary wedge, and a bolt. The first slider housing includes a first slot, wherein the end fitment of a rear brake lever cable is mounted. The primary and the secondary wedges are locked to move in horizontal direction onto a plurality of grooves provided in the first slider housing. The bolt holds the first slider housing together intact. The device further comprises of a second slider with an external angled surface and a second slot, wherein the end fitment of a rear wheel brake cable is mounted. The second slider is also provided with a compression spring placed inside a groove provided in the second slider below the second slot to deliver the varied force distribution. The second slider is placed in the central opening of the first slider housing, such that the second slider is locked to move in vertical direction. The device further comprises of a floating slider with an internal angled surface and a third slot, wherein the end fitment of a front wheel brake cable is mounted in the third slot.
[0008] The first slider housing along with the second slider is placed inside the floating slider, wherein the internal angled surfaced of the floating slider interacts with the primary wedge and the secondary wedge to control the movement of the floating slider.
[0009] The present invention provides a simple solution to the existing issue of complex mechanism, ineffectiveness, less durability, skidding while braking and possibility of wheel locking, during the operation. The present invention also provides the solution for existing drawbacks by providing a cost-effective device.
[0010] The invention provides a wedge braking system for a two wheeler application, wherein the device activates the front and the rear brakes of a vehicle simultaneously resulting in better braking system. The simple design and mechanism ensures the less manufacturing cost of the vehicle, which enables the affordability for the buyers. The present invention is also fail safe, wherein during the event of brake failure the device ensures the anti-skidding and safe braking of a vehicle. This solution also provides a varied brake force distribution for different riding behavior, wherein the braking force is uniformly distributed for safe and efficient braking. In the event of depressing the rear brake lever, the device actuate the front and the rear brakes and both wheels gets lock at the same time ensuring safe braking.
Brief description of the drawings:
[0011] The foregoing and other features of embodiments will become more apparent from the following detailed description of embodiments when read in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to like elements.
[0012] FIG 1 illustrates a device with multiple wedges showing the mechanism to activate the front and the rear brakes of a vehicle simultaneously.
[0013] FIG 2 illustrates the device showing the mechanism during the event of rear brake fail.
[0014] FIG 3 illustrates the positioning of the device in a vehicle.
[0015] FIG 4(a) and FIG 4 (b) illustrates a device showing the working of compression spring in the second slider.
[0016] FIG 5 illustrates the exploded view of the device using multiple wedges for wedge braking system.
Detailed description of the invention:
[0017] Reference will now be made in detail to the description of the present subject matter, one or more examples of which are shown in figures. Each example is provided to explain the subject matter and not a limitation. Various changes and modifications obvious to one skilled in the art to which the invention pertains are deemed to be within the spirit, scope and contemplation of the invention.
[0018] The present invention provides a wedge braking system for a two wheeler application and the device is configured on the drum-drum braking and drum-disc braking configuration. The device activates the front and the rear brakes of a vehicle simultaneously resulting in better braking performance. The present invention also provides a varied brake force distribution for different riding behavior, wherein the braking force is distributed for safe and efficient braking. In the event of depressing the rear brake lever, the device actuates the front and the rear brakes and both the wheels get locked at the same time ensuring a safe braking. During the event of brake fail the device activates a safe brake fail system again ensuring a safe braking and acts as a primary indication to replace the failed brakes. The device comprises of a first slider with a first slot, wherein the end fitment of a rear brake lever cable is mounted in the first slot. A second slider with an external angled surface has a second slot, wherein the end fitment of a rear wheel brake cable is mounted in the second slot. The second slider is also provided with a compression spring placed inside a groove provided in the second slider below the second slot to deliver the varied force distribution. The device also includes a sliding wedge with an external angled surface and a floating slider with an internal angled surface having a third slot, wherein the end fitment of a front wheel brake cable is mounted into the third slot. The internal angled surfaced of the floating slider interacts with the sliding wedge to control the movement of the floating slider and a housing with plurality of sliding grooves, wherein the first slider, the second slider, the floating slider and the sliding wedge are fitted on the grooves. The sliding wedge is locked to move in horizontal direction and the second slider is locked to move in vertical direction onto the groove provided in the housing.
[0019] FIG 1 illustrates a device showing the mechanism to activate the front and the rear brakes of a vehicle simultaneously. The device (100) comprises a first slider housing (101), wherein the first slider housing (101) further comprises of a first slot (102), wherein the end fitment of a rear brake lever cable is mounted. The device (100) includes a central opening (110), a primary wedge (105) and a secondary wedge (106) wherein, the primary and the secondary wedges ((105) and (106)) are locked to move in horizontal direction onto a plurality of grooves provided in the first slider housing (101) and a bolt (109) to hold the first slider housing (101) together intact. The device further comprises of a second slider (103) with an external angled surface having a second slot (104), wherein the end fitment of a rear wheel brake cable is mounted. The second slider (103) is also provided with a compression spring (111) (as shown in Fig 4) placed inside a groove provided in the second slider (103) below the second slot (104) to deliver the varied force distribution. The second slider (103) is placed in the central opening (110) of the first slider housing (101), such that the second slider (103) is locked to move in vertical direction, Further the device (100) comprises of a floating slider (107) with an internal angled surface having a third slot (108), wherein the end fitment of a front wheel brake cable is mounted. The first slider housing (101) along with the second slider (103) is placed inside the floating slider (107) as shown in FIG 1. The internal angled surfaced of the floating slider (107) interacts with the primary wedge (105) and the secondary wedge (106) to control the movement of the floating slider (107).
[0020] In a default condition, the front, the rear and the lever brake cables are connected to their respective slots as shown in FIG 1. The bolt (109) holds the first slider housing (101) together which constraints the second slider (103) to move only in the vertical direction, wherein the primary wedge (105) and the secondary wedge (106) are allowed to move only in the horizontal direction. The second slider (103) pushes the wedges (105) and (106) horizontally outwards, when there is a downward resultant load on the rear cable mount (102) due to the reactive load from the rear wheel brake as shown in FIG 1. In one of the example, when the brake lever (303) is depressed, there is an outward resultant force on the primary and secondary wedges (105) and (106) due to the downward reactive force from the second slider (103) and also there is an inward resultant force on the primary and secondary wedges (105 and 106) due to the downward reactive force from the floating slider (107). In this scenario as long as the outward horizontal force is greater than the inward horizontal force in the primary and the secondary wedges the front and the rear brakes of a vehicle are actuated simultaneously resulting in force transmition to the respective brakes. Hence, there is no locking of wheels and the vehicle stops with efficient stopping distance. The present invention is designed with dual wedge such that it provides heavier load carrying capacity i.e. when the device is fitted on the vehicle, the device works very smoothly even if the load on the vehicle is high. Therefore, the present invention can be operated on any load conditions.
[0021] FIG 2 illustrates the device showing the mechanism during the event of rear brake fail. In one of the example, In the event where the rear brake (304) of the vehicle fails, the outward horizontal force becomes negligible due to the absence of downward reactive load from the rear wheel brake cable. Hence, when the brake lever is depressed the inward horizontal forces between the wedges ((105) and (106)) and floating slider (107) pushes the wedges (105) and (106) inside, which tends to relatively lift the second slider (103) and disengages the floating slider (107) thereby front brake cable of the device is not actuated as shown in Fig 2, which also acts as an indication that the brakes have failed and needs to be replaced.
[0022] In another embodiment of the present invention the device (100) is configured to various brake force distribution ratios for different vehicles by varying the surface angle of wedges, second slider and floating slider.
[0023] In another embodiment of present invention, the device (100) may be configured to use a metal ball or pivoted lever to engage and disengage the floating slider (107) but may not be limited to the wedges and also the device (100) may be fitted on any of the vehicles but not limited to the two wheelers. The present invention is configured to various brake force distribution ratios for different vehicles by varying the surface angle of wedges, second slider and floating slider.
[0024] FIG 3 illustrates the positioning of the device in a vehicle. The device (100) fitted on the two wheeler as shown in FIG 3. The device (100) is mounted vertically on the vehicle such that the mounting position of the plurality of cables are vertical with respect to the device. A cable connected to the rear brake lever (303) is mounted on the first slot (102) of the first slider housing (101) in the device. The cable from front brake (301) is mounted to a front brake lever of the vehicle. The cable from the rear brake (304) is mounted on the second slot (104) of the second slider (103) in the device (100). Another cable from the front brake (301) is mounted on the third slot (108) of the floating slider (107) in the device (100). When the rear brake lever of the vehicle is depressed the mechanism of the device ensures to lock the both wheels of the vehicles at a time.
[0025] FIG 4(a) and FIG 4 (b) illustrates a device showing the working of compression spring in the second slider. The function of the compression spring (111) is to provide the constant braking force to the rear wheel to avoid wheel locking due to which the vehicle stops with efficient stopping distance and eliminates skid in rear wheel.
[0026] In one of the example as discussed in figure 2, when the brake lever (303) is depressed and all the sliders (101), (103), (107) move as a whole assembly the compression spring (111) starts to compress when the reactive load on the second slider (103) exceeds the stiffness of the spring, this causes relative downward movement on the second slider (103) thereby no excess force is being transmitted to the second slider (103) which implies constant braking force on the rear wheel. Therefore, if the load is more on the vehicle then the spring is compressed to deliver the varied force distribution and hence ensuring the efficient stopping distance for the rider of the vehicle.
[0027] FIG 5 illustrates the exploded view of the device using multiple wedges for wedge braking system. This figure clearly shows the assembly of various components of device (100). The device (100) comprises a first slider housing (101), wherein the first slider housing (101) further comprises of a first slot (102), wherein the end fitment of a rear brake lever cable is mounted, a central opening (110), a primary wedge (105) and a secondary wedge (106) wherein, the primary and the secondary wedges ((105) and (106)) are locked to move in horizontal direction onto a plurality of grooves provided in the first slider housing (101) and a bolt (109) to hold the first slider housing (101) together intact. The device further comprises of a second slider (103) with an external angled surface having a second slot (104), wherein the end fitment of a rear wheel brake cable is mounted. The second slider (103) is also provided with a compression spring (111) placed inside a groove provided in the second slider (103) below the second slot (104) to deliver the varied force distribution. The second slider (103) is placed in the central opening (110) of the first slider housing (101), such that the second slider (103) is locked to move in vertical direction, Further the device comprises of a floating slider (107) with an internal angled surface having a third slot (108), wherein the end fitment of a front wheel brake cable is mounted. The first slider housing (101) along with the second slider (103) is placed inside the floating slider (107).The internal angled surfaced of the floating slider (107) interacts with the primary wedge (105) and the secondary wedge (106) to control the movement of the floating slider (107).
[0028] While at least one exemplary embodiment has been presented in the foregoing detailed description, it should be appreciated that a vast number of variations exist.
, Claims:We claim:
1. A device (100) for wedge braking system using multiple wedges, the device (100) comprising:
a) a first slider housing (101), wherein the first slider housing (101) comprises of:
- a first slot (102), wherein the end fitment of a rear brake lever cable is mounted;
- a central opening (110);
- a primary wedge (105) and a secondary wedge (106) wherein, the primary and the secondary wedges (105) and (106) are locked to move in horizontal direction onto a plurality of grooves provided in the first slider housing (101);
- a bolt (109) to hold the first slider housing (101) together intact;
b) a second slider (103) with an external angled surface, comprises of:
- a second slot (104), wherein the end fitment of a rear wheel brake cable is mounted, wherein the second slider (103) is placed in the central opening (110) of the first slider housing (101), such that the second slider (103) is locked to move in vertical direction;
- a compression spring (111) placed inside a groove provided in the second slider below the second slot (104) to deliver the varied force distribution; and
c) a floating slider (107) with an internal angled surface comprises of:
- a third slot (108), wherein the end fitment of a front wheel brake cable is mounted, wherein the first slider housing (101) along with the second slider (103) is placed inside the floating slider (107), wherein the internal angled surfaced of the floating slider (107) interacts with the primary wedge (105) and the secondary wedge (106) to control the movement of the floating slider (107).

2. The device (100) as claimed in claim 1, wherein the second slider (103) pushes the primary wedge (105) and the secondary wedge (106) horizontally outwards during a downward movement of the second slider (103), which is resulted by the reactive pulling force from the rear wheel brake when the rear brake lever is depressed, thereby locking the floating slider (107) and actuating a front wheel brake (302).

3. The device (100) as claimed in claim 1, wherein the floating slider (107) pushes the primary and the secondary wedges ((105) and (106)) horizontally inwards due to the resultant force generated when the rear brake is failed, and lifting the secondary slider (103) vertically upwards, thereby not engaging the floating slider (107) and the braking is not transferred to the front wheel brake (302).

4. The device (100) as claimed in claim 1, wherein the device (100) is configured to use a metal ball or a pivoted lever to engage and disengage the floating slider (107).

5. The device (100) as claimed in claim 1, wherein the device (100) is configured on the drum-drum and drum-disc braking configuration.

6. The device as claimed in claim 1, wherein the device (100) is fitted on any of the vehicles but not limited to the two wheelers.
7. The device (100) as claimed in claim 1, wherein the device (100) is configured to various brake force distribution ratios for different vehicles by varying the surface angle of wedges, second slider and floating slider.