MULTI SHAFT GEAR SHIFT SYSTEM
FIELD OF INVENTION:
[001] The present subject matter described herein, relates to gear shifting system of vehicle and, in particular, to multi shaft gear shift system having electric motors to shift the gears upon selection of gear shift pedal manually. 5
BACKGROUND AND PRIOR ART:
[002] Gear shift system is an integral part of manual and semi-automatic transmission which enable driver to shift gear as per requirement during driving of the vehicle. In the automatic transmission, I shape pattern for gear shifting is followed. Generally, H shape gear shifting pattern is present in the manual 10 transmission mode. Both, I shape and H shape gear shifting pattern are restricted in their movement beyond specific direction.
[003] The conventional automatic transmission has an I-shaped shift pattern, in which not only the individual ranges of parking (abbreviated hereinafter as "P"), reverse ("R"), neutral ("N") and drive ("D") ranges but also a second range 15 (abbreviated hereinafter as "S") and a low range ("L") as modes for engine braking in uphill running are arranged in series. But these systems are fully automatic and only knob has to move in the indicated range to put the vehicle in forward, reverse, neutral, and stop condition. These systems are costly for low budget vehicles. When the vehicle is in forward gear position, the vehicle moves 20 according to the accelerator and goes beyond the control of the user like in manual gear systems. In the manual gear system, the user changes the gears for comfort and control driving of the vehicle. Even the vehicle does not move beyond its threshold speed in a particular gear.
[004] Fig. 1 illustrates conventional manual gear shift system for selecting and 25 shifting the gears in the vehicle. The conventional manual gear shift system 100 has gear box 101, gear knob 102, Gear Shift Lever Assembly (GSLA) 104, and gear boot 106. Conventionally, the gear knob 102 moves in H pattern to select the required gears in the gear box 101. Driver engages and disengages the gear by
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giving effort on the gear knob 102 of the GSLA 104. The driver applies the force on the gear knob 102 for engaging and disengaging the gear. Shifting mechanism of conventional gear is very common and person skilled in the art knows how the gears are selected and shifted in the gear box. Therefore, detailed description of the gear shifting mechanism in the conventional gear shift system is not provided 5 in the present description to avoid ambiguity and bring clarity in the present subject matter.
[005] Problems in the art: In manual transmission of H pattern, the shift device allows the driver to select a gear as per the speed of the vehicle and, furthermore, provides an operating feel when the driver shifts the gear. Therefore, the driver 10 feels the gear shift feeling on his/her hand and this feeling varies from vehicle to vehicle as well as for different speeds for the same vehicle.
[006] Further, the driver has to remember the H pattern of gear shifting which creates problem some time. For example, the driver wants to put the vehicle in fourth gear but driver puts the vehicle in reverse gear due to H pattern. 15
[007] Another problem in the conventional gear shift system, length of lever ratio affects the shifting smoothness and stroke in the vehicle. Therefore, length of the lever is decided as per the size of the vehicle. It becomes cumbersome to change the length of the lever every time when a new model of vehicle has to be launched. 20
[008] Another problem in the conventional gear shift system is that the driver feels shifting of gear as bad and good. While shifting first, second, and reverse gear, driver feels shifting loads as high as compare to high gears and 5th gear. Further, shifting of gears creates noise while engaging and disengaging with gears in the gear box due to GSLA (Gear Shift Lever Assembly) and shift and select 25 cable.
[009] Major disadvantage with the conventional gear shift system is that the driver has to put lot of manual efforts for selecting and shifting the gears. For example, in the big vehicles more human efforts are required to shift the gears.
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Specifically, during heavy traffic conditions, the driver changes the gear frequently which irritates the driver and driving comfort also decreases. Further, the frequent change in the gears creates fatigue for the driver.
[0010] In view of the above, it is beneficial to have a semi-automatic gear shift system that reduces the manual efforts for shifting the gears in manual 5 transmission. Therefore, a simple and inexpensive gear shift system for shifting the gears in the manual transmission of the vehicle is required.
OBJECTS OF THE INVENTION:
[0011] The principal objective of the present invention is to provide a semi-automatic gear shift system for shifting gears in gear box of vehicle. 10
[0012] Another object of the present subject matter is to provide Multi shaft gear shift tower for shifting gears in the gear box of the vehicle.
[0013] Another object of the present invention is to provide a Multi Shaft Gear Shift System (MSGSS) having electric motors and controller for shifting the gears in the gearbox. 15
[0014] Another object of the present invention is to provide a gear shift pedal having I direction movement for shifting the gears.
[0015] Another object of the present invention is to provide a controller in the MSGSS for providing electric signals to the electric motors for running and moving the gear shafts. 20
[0016] Yet another object of the present invention is to provide a Multi Shaft Gear Shift System (MSGSS) for reducing manual efforts in the manual gear shift.
SUMMARY OF THE INVENTION:
[0017] The subject matter disclosed herein relates to a multi shaft gear shift system for shifting gears in gearbox of vehicle. The multi shaft gear shift system 25 includes a multi shaft gear shift tower, a plurality of electric motors, a controller, a gear shift pedal, and a reverse gear switch. The multi shaft gear shift tower comprises a solid shaft, a middle hollow shaft, and an outer hollow shaft. The
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solid shaft is freely rotatable mounted inside the middle hollow shaft. The solid shaft is coaxially positioned inside the middle hollow shaft. Further, the middle hollow shaft is coaxially positioned inside the outer hollow shaft. The outer hollow shaft is rotatably mounted over the middle hollow shaft. The solid shaft, the middle hollow shaft, and the outer hollow shaft are in cylindrical shape. The 5 outer hollow shaft, the middle hollow shaft and the solid shaft are guided by a circular case that surrounds the outer hollow shaft. The solid shaft is longest in length whereas outer hollow shaft is smallest in length. Further, the length of the middle hollow shaft is in between the length of the solid shaft and the outer hollow shaft. Further each shaft has a pulley at top and lever gear shift and select 10 (LGSS) at bottom. The pulley of solid shaft is at the top followed by pulley of the middle hollow shaft at middle and pulley of outer hollow shaft at the bottom. The pulleys surround the end circular portion of the each shaft. The pulleys are provided at circumference of each cylindrical shaft to rotate the cylindrical shaft. As the solid shaft has longest length, the LGSS of the solid shaft is provided at the 15 bottom. At the bottom side, the LGSS of the middle hollow shaft is provided at middle and the LGSS of the outer shaft is provided at the top. The LGSS of each shaft is freely rotatable with respect to each other. Further, the LGSS of the solid shaft is responsible for low gear shift, such as 1
st and 2nd gear shift and the LGSS of the middle hollow shaft is responsible for high gear shift, such as 3rd and 4th 20 gear shift. The LGSS of the outer hollow shaft is responsible for 5th and reverse gear shift. Each shaft rotates about the vertical centre axis and rotates the corresponding LGSS for shifting of gears.
[0018] The pulley of each shaft of the multi shaft gear shift tower is connected with an electric motor through a belt. There are three electric motors which are 25 connected with the pulleys of the multi shaft gear shift tower through a belt. The three electric motors are low gear shift motor, high gear shift motor, and 5th and reverse gear shift motor. The three electric motors are connected with the controller through wires. When the electric motors rotate upon receiving inputs from the controller. Further, the controller is coupled with a gear shift pedal via 30 wires. The gear shift pedal can move in two directions, i.e., up-shift direction for
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positive ‘+’ shifting of gears and downshift direction for negative ‘-’ shifting of gears. Where the positive shifting means increasing the gears like 12345 and negative shifting means decreasing the gears like 54321. When the gear shift pedal is pushed in up-shift direction, the controller counts the pushes and adds the pushes in base value which is zero ‘0’ and result of the addition 5 determines the gear selection. For example, if the gear shift pedal is pushed up-shift direction for one time, the controller adds 1 to the zero and determines gear selection as first gear sends signals for shifting of first gear to the electric motors. The controller sends operating signal to the low speed gear shift motor. The low gear shift motor rotates the pulley of solid shaft and its corresponding LGSS for 10 engaging the first gear. Similarly, if the gear shift pedal is pushed second time after the first gear in up-shift direction, the controller adds 1 more to the base value which is 1 now and shifts the gear in 2
nd gear. If the user pushes the gear shift pedal in downshift direction, the controller subtracts 1 from the base value which is 2 now and gets signal for 1st gear. The controller sends the signal to the 15 low speed motor for shifting of first gear. When reverse gear switch is pressed, the controller sends the signal to 5th and reverse gear motor for shifting of reverse gear. Upon shifting of reverse gear, the controller makes the base value again zero. To change the reverse gear into neutral or forward gear, the reverse gear switch can be pressed again. Further, if gear shift pedal is pushed in one time up-20 shift direction, the reverse gear is changed into neutral from the reverse gear. The multi shaft gear shift system is coupled with a display unit in dash board which indicates the current gear position. Further, the present multi shaft gear shift system works with clutch pedal of the vehicle. Gear selection and shifting takes place in the present multi shaft gear shift system only when clutch pedal is 25 pressed. The present multi shaft gear shift system is similar to manual transmission system in terms of gear shifting with respect to clutch pedal. The present multi shaft gear shift system reduces human efforts for push gear knob in H pattern for selection and shifting of gears.
[0019] In order to further understand the characteristics and technical contents of 30 the present subject matter, a description relating thereto will be made with
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reference to the accompanying drawings. However, the drawings are illustrative only but not used to limit scope of the present subject matter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0020] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be 5 considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and 10 components. Some embodiments of system or methods in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0021] Fig. 1 illustrates conventional manual gear shift system for selecting and shifting the gears in the vehicle; 15
[0022] Fig. 2 illustrates front view of Multi Shaft Gear Shift tower for shifting gears in gearbox, in accordance with an embodiment of the present subject matter;
[0023] Fig. 3 illustrates side view of Multi Shaft Gear Shift tower for shifting gears in gearbox, in accordance with an embodiment of the present subject matter;
[0024] Fig. 4 illustrates arrangement of Multi Shaft Gear Shift tower with electric 20 motors, in accordance with an embodiment of the present subject matter; and
[0025] Fig. 5 illustrates Multi Shaft Gear Shift System with controller and gear shift pedal for shifting gears, in accordance with an embodiment of the present subject matter.
[0026] The figures depict embodiments of the present subject matter for the 25 purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
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DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0027] The subject matter disclosed herein relates to a multi shaft gear shift system for shifting gears in gearbox of vehicle. The multi shaft gear shift system includes a multi shaft gear shift tower, a plurality of electric motors, a controller, a gear shift pedal, and a reverse gear switch. The multi shaft gear shift tower 5 comprises a solid shaft, a middle hollow shaft, and an outer hollow shaft. The solid shaft is mounted inside the middle hollow shaft. Further, the middle hollow shaft is rotatably mounted upon the solid shaft. The solid shaft is coaxially positioned inside the middle hollow shaft. Further, the middle hollow shaft is coaxially positioned inside the outer hollow shaft. The outer hollow shaft is 10 rotatably mounted over the middle hollow shaft. The solid shaft, the middle hollow shaft, and the outer hollow shaft are in cylindrical shape. The outer hollow shaft, the middle hollow shaft and the solid shaft are guided by a circular case that surrounds the outer hollow shaft. The solid shaft has longest in length whereas outer hollow shaft is smallest in length. Further, the length of the middle hollow 15 shaft is in between the length of the solid shaft and the outer hollow shaft. Further each shaft has a pulley at top and lever gear shift and select (LGSS) at bottom. The pulley of solid shaft is at the top followed by pulley of the middle hollow shaft at middle and pulley of outer hollow shaft at the bottom. The pulleys surround the end circular portion of the each shaft. The pulleys are provided at 20 circumference of each cylindrical shaft to rotate the cylindrical shaft. As the solid shaft has longest length, the LGSS of the solid shaft is provided at the bottom. Further, the LGSS of the middle hollow shaft is provided at middle and the LGSS of the outer shaft is provided at the top. The LGSS of each shaft is freely rotatable with respect to each other. Further, the LGSS of the solid shaft is responsible for 25 low gear shift, such as 1st and 2nd gear shift and the LGSS of the middle hollow shaft is responsible for high gear shift, such as 3rd and 4th gear shift. The LGSS of the outer hollow shaft is responsible for 5th and reverse gear shift. Each shaft rotates about the vertical centre axis and rotates the corresponding LGSS for shifting of gears. 30
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[0028] The pulley of each shaft of the multi shaft gear shift tower is connected with an electric motor through a belt. There are three electric motors which are connected with the pulleys of the multi shaft gear shift tower through a belt. The three electric motors are low gear shift motor, high gear shift motor, and 5th and reverse gear shift motor. The three electric motors are connected with the 5 controller through wires. When the electric motors rotate upon receiving instructions from the controller. Further, the Controller is coupled with a gear shift pedal via wires. The gear shift pedal can move in two directions, i.e., up-shift direction for positive ‘+’ shifting of gears and downshift direction for negative ‘-’ shifting of gears. Where the positive shifting means increasing the gears like 10 12345 and negative shifting means decreasing the gears like 54321. When the gear shift pedal is pushed in up-shift direction, the controller counts the push and adds the pushes in zero value which is base value to decide the gear selection. For example, if the gear shift pedal is pushed up-shift direction for one time, the controller will add 1 to the zero and sends signals for 15 shifting of first gear. The controller sends operating signal to the low speed gear shift motor. The low gear shift motor rotates the pulley of solid shaft and its corresponding LGSS for engaging the first gear. Similarly, if the gear shift pedal is pushed second time after the first gear in up-shift direction, the controller adds 1 more to the base value which is 1 now and shifts the gear in 2nd gear. If the user 20 pushes the gear shift pedal in downshift direction, the controller subtracts 1 from the base value which is 2 now and gets signal for 1st gear. The controller sends the signal to the low speed motor for shifting of first gear. When reverse gear switch is pressed, the controller sends the signal to 5th and reverse gear motor for shifting of reverse gear. Upon shifting of reverse gear, the controller makes the base value 25 again zero. To change the reverse gear into neutral or forward gear, the reverse gear switch can be pressed again. Further, if gear shift pedal is pushed in one time up-shift direction, the reverse gear is changed into neutral from the reverse gear. The multi shaft gear shift system is coupled with a display unit in dash board which indicates the current gear position. Further, the present multi shaft gear 30 shift system works with clutch pedal of the vehicle. Gear shifting takes place in
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the present multi shaft gear shift system only when clutch pedal is pressed. The present multi shaft gear shift system is similar to manual transmission system in terms of gear shifting with respect to clutch pedal. The present multi shaft gear shift system reduces human efforts for push gear knob in H pattern for selection and shifting of gears. 5
[0029] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those 10 skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter and are included within its spirit and scope. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the 15 concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the 20 following description when considered in connection with the accompanying figures.
[0030] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject 25 matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0031] Fig. 2 illustrates front view of Multi Shaft Gear Shift tower for shifting gears in gearbox, in accordance with an embodiment of the present subject matter. 30
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Further the side view of the Multi Shaft Gear Shift tower for shifting gears in gearbox is illustrated in the figure 3. The figure 3 illustrates the structure of Multi Shaft Gear Shift tower in detail in accordance with an embodiment of the present subject matter. The multi shaft gear shift tower 300 has a solid shaft 304, a middle hollow shaft 305, and an outer hollow shaft 306. All the shafts are guided through 5 the case gear shift guide 307. The case gear shift guide 307 provide support to the coaxially structure of the Multi Shaft Gear Shift tower 300. Further, the case gear shift guide 307 is provided near the middle portion of the Multi Shaft Gear Shift tower 300. The solid shaft 304 is positioned inside the middle hollow shaft 305. Further, the middle hollow shaft 305 is rotatably mounted upon the solid shaft 10 305. The solid shaft 304 is coaxially positioned inside the middle hollow shaft 305. Further, the middle hollow shaft 305 is coaxially positioned inside the outer hollow shaft 306. The outer hollow shaft 306 is freely rotatable mounted over the middle hollow shaft 305. The solid shaft 304, the middle hollow shaft 305, and the outer hollow shaft 306 are in cylindrical shape. The solid shaft 304 can freely 15 rotate inside the middle hollow shaft 305. Similarly, the middle hollow shaft 305 can freely rotate inside the outer hollow shaft 306. The outer hollow shaft 306, the middle hollow shaft 305, and the solid shaft 304 are guided by a circular case that surrounds the outer hollow shaft 306.
[0032] The solid shaft 304 is longest in length whereas the outer hollow shaft 306 20 is smallest in length. Further, the length of the middle hollow shaft 305 is in between the length of the solid shaft 304 and the outer hollow shaft 306. Each shaft has a pulley at top and lever gear shift and select (LGSS) at bottom. The solid shaft 304 has a pulley 301 at the top and the (LGSS) 310 at the bottom. The middle hollow shaft 305 has a pulley 302 at the top and the LGSS 309 at bottom. 25 The outer hollow shaft 306 has a pulley 303 at the top and the LGSS 308 at bottom. The pulleys 301, 302, 303 are positioned above the case gear shift guide 307 and the LGSS 308, 309, 310 are positioned below the case gear shift guide 307. The pulleys 301, 302, 303 surround the top end circular portion of the each shaft. The pulleys 301, 302, 303 are provided at circumference of each cylindrical 30 shaft to rotate the cylindrical shaft. As explained above, the solid shaft 304, the
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middle hollow shaft 305, and the outer hollow shaft 306 are coaxially positioned where the solid shaft 304 is positioned at inner side followed by the middle hollow shaft 305. Further, the outer hollow shaft is positioned at the outer layer.
[0033] The pulley 301 of the solid shaft 304 is at the top. The pulley 302 of the middle hollow shaft 305 is at middle and the pulley 303 of the outer hollow shaft 5 306 is at the bottom. As the solid shaft 304 has longest length, the LGSS 310 of the solid shaft 304 is provided at the bottom. Further, the LGSS 309 of the middle hollow shaft 305 is provided at middle and the LGSS 308 of the outer hollow shaft 308 is provided at the top. The LGSS 308, 309, 310 of each shaft 304, 305, 306 is freely rotatable with respect to each other. 10
[0034] The solid shaft 304 is responsible for low gear shift, such as first (1st) gear and second (2nd) gear. Further, the LGSS 310 of the solid shaft 304 shifts the low gear shift. The middle hollow shaft 305 is responsible for high gear shift, such as third (3rd) and fourth (4th) gear shift. Upon rotation of the middle hollow shaft 305 (as explained in figure 4 and 5) the LGSS 309 of the middle hollow shaft 305 15 shifts the high gear and engages the high gear in the gear box. The outer hollow shaft 306 is responsible for shift of fifth (5th) and reverse gear in the gear box. Upon rotation of the outer hollow shaft, the LGSS 308 of the outer hollow shaft 306 shifts the 5th and the reverse gear in the gear box. Each shaft rotates about the vertical centre axis and rotates the corresponding LGSS for shifting of gears. 20
[0035] Fig. 4 illustrates arrangement of Multi Shaft Gear Shift tower 300 with electric motors, in accordance with an embodiment of the present subject matter. The pulley of each shaft of the multi shaft gear shift tower 300 is connected with an electric motor through a belt. The multi shaft gear shift tower 300 is connected with three electric motors for rotation of the shafts. One electric motor is coupled 25 with one shaft and rotates the coupled shaft for shifting of gears. The electric motors are connected with the pulleys of the shafts of the multi shaft gear shift tower 300 through a belt. The three electric motors are low gear shift motor 403, high gear shift motor 404, and 5th and reverse gear shift motor 405. The low gear shift motor 403 is coupled (coupled and connected both can be used 30
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interchangeably, the purpose of coupled or connected is to show how rotation force from the electric motor transfers to pulley of shafts) with pulley 301 of the solid shaft 304 through a belt 402 for shifting of low gears. The high gear shift motor 404 is coupled with the pulley 302 of the middle hollow shaft 305 with a belt for shifting of the high gears. The 5
th and reverse gear shift motor 405 is 5 coupled with the pulley 303 of the outer hollow shaft 306 with a belt for shifting of the 5th and reverse gears. The three electric motors 403, 404, 405 are connected with the controller (as explained in figure 5) through wires to receive operating signals.
[0036] Fig. 5 illustrates Multi Shaft Gear Shift System with controller and gear 10 shift pedal for selecting and shifting gears, in accordance with an embodiment of the present subject matter. The multi shaft gear shift system 500 includes a multi shaft gear shift tower 300 (as explained in figure 2-4), a plurality of electric motors (as explained in figure 4) 501a, 501b, 501c, a controller 502, a gear shift pedal 505, and a reverse gear switch 503. The plurality of electric motors 501a, 15 501b, 501c are three in number. The number of electric motors can be decreased as per the requirements. The system of multi shaft gear shift tower 300 and the plurality of electric motors 501a, 501b, 501c is referred as 501 in the present figure. As explained above in figure 4, the shafts of the multi shaft gear shift tower 300 are connected/coupled with the electric motors with belts. Further, the 20 plurality of electric motors 501a, 501b, 501c are connected with the controller 502 via wires 507 to receive operating signals from the controller 502. Further, the controller 502 is coupled with a gear shift pedal 505, reverse gear switch 503 and a display unit 504 via wires. The display unit 504 is provided at dashboard of the vehicle for easy visibility of the driver. The controller 502 receives the 12V power 25 from the battery of the vehicle and while starting of the vehicle ignition. The present multi shaft gear shift system 500 is coupled with clutch pedal. Coupling of the clutch pedal with the multi shaft gear shift system 500 is similar to the coupling of clutch pedal with manual transmission system. As there is no change in the coupling of the clutch pedal with the gear box. The multi shaft gear shift 30 system 500 works with combination of the clutch pedal. If the clutch pedal is
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pressed, the gears in the multi shaft gear shift system 500 can be changed. Upon release of the clutch pedal, the vehicle moves as per the selected gear. The combination of clutch pedal and gear box is well known to a person skilled in the art, therefore, detailed explanation of the working of clutch pedal with gear box is avoided for clarity in the present subject matter. 5
[0037] When the clutch pedal is pressed, knob 506 of the gear shift pedal 505 can move in two directions, i.e., up-shift direction for positive ‘+’ shifting of gears and downshift direction for negative ‘-’ shifting of gears. Where the positive shifting means increment in the gears like 12345 and negative shifting means decrease in gears like 54321. When the knob 506 of gear shift 10 pedal 505 is pushed in up-shift direction, the controller 502 counts the pushes and adds the pushes in zero base value to decide the gear selection for shifting of gears. For example, if the knob 506 of gear shift pedal 505 is pushed up-shift direction for one time, the controller 502 add 1 to the zero base value and stores the new base value, i.e., 1 memory and sends operating signal to the electric motor 15 of the low gear shift for shifting of first gear. The controller 502 sends operating signal to the low gear shift motor 501a. The low gear shift motor 501a rotates the pulley 301 of the solid shaft 304 and its corresponding LGSS 310 for engaging the first gear. The LGSS 310 pushes gear train of the first gear for engaging the first gear. Similarly, if the knob 506 of gear shift pedal 505 is pushed second time after 20 the first gear in up-shift direction, the controller 502 adds 1 to the base value which is 1 now and shifts the gear in second (2nd) gear. The controller 502 takes the base value from the memory and adds signal from the gear shift pedal 505 to the base value and update the base value in the memory. Similarly, if the gear shift pedal is pushed 3 times continuously in up-shift direction from the neutral 25 position of the vehicle, the controller 502 counts the pushes and adds the counted pushes in the base value which is zero in neutral position. If the push counts are three, the controller 502 adds 3 to the base value zero and sends the signal to electric motor for shifting of third gear. After engaging the gears, the clutch pedal is released to move the vehicle. 30
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[0038] If the knob 506 of gear shift pedal 505 is pushed in downshift direction, the controller 502 counts the pushes and subtract the same from the stored base value. For example, current engaged gear is second and the knob 506 of gear shift pedal 505 is pushed one time in downshift direction, the controller 502 takes the stored base value which is 2 in the second gear position and subtracts 1 from 5 the base value 2 and gets the signal for first (1st) gear. The controller 502 sends the signal to the low speed motor 501a for shifting of first gear. Similarly, base value for fifth (5th) gear is 5 and fourth gear is 4. If the vehicle is in fifth (5th) gear, the gear shift pedal 505 is pushed three (3) times in downshift direction, the controller 502 counts 3 pushes and subtract 3 from the base value 5 and sends signal for the 10 shifting of second gear. Similar methodology can be opted for any gear shifting either in upshift direction or downshift direction. The controller 502 is coupled with the display unit 504 in the dash board of the vehicle. The controller 502 displays the current gear according to current base value in the display unit 504. The display unit helps the driver to know the current gear of the vehicle. 15
[0039] For the reverse gear engagement, the reverse gear switch 503 is pressed, the controller 502 receives the signal from the reverse gear switch and makes the base value -1 and the sends the signal to 5th and reverse gear motor for shifting of reverse gear. The fifth (5th) and reverse gear shift motor receives the signal and rotates the outer hollow shaft in reverse direction and engages the reverse gear. 20 Upon shifting of reverse gear, the controller 502 makes the base value -1. To change the reverse gear into neutral or forward gear, the reverse gear switch 503 can be pressed again. Upon repressing of the reverse gear switch, the controller changes the base value to zero which indicates neutral position. Another way, if gear shift pedal 505 is pushed in one time toward up-shift direction, the reverse 25 gear is changed into neutral position from the reverse gear. The controller 502 counts the up-shift push and adds the counted one push “1” to stored base value -1 and base value becomes zero. The multi shaft gear shift system 500 is coupled with a display unit 504 in dash board which indicates the current gear position. Further, the present multi shaft gear shift system 500 works with clutch pedal 30 system of the vehicle. Gear selection and shifting takes place in the multi shaft
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gear shift system 500 only when clutch pedal is pressed. The multi shaft gear shift system is similar to manual transmission system in terms of gear shifting with respect to clutch pedal. Further, the gear shift pedal 505 can be switch which can be placed on the steering wheel for easy accessibility.
[0040] The present multi shaft gear shift system gear selection and shifting is very 5 easy. Further, it reduces human efforts for pushing of gear knob in H pattern for selection and shifting of gears. The user has to push the gear knob in two directions only.
[0041] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present 10 subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/device of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations 15 which fall within the scope of the present subject matter.

We claim:
1. A multi shaft gear shift tower (300) for shifting gears in vehicle, the multi shaft gear shift tower (300) comprising:
a solid shaft (304) for low gear shift; 5
a middle hollow shaft (305) freely rotatable mounted upon the solid shaft (304), wherein the solid shaft (304) is coaxially positioned inside the middle hollow shaft (305); and
an outer hollow shaft (306) free rotatable mounted upon the middle hollow shaft (305), wherein the middle hollow shaft (305) is coaxially 10 positioned inside the outer hollow shaft (306).
2. The multi shaft gear shift tower (300) as claimed in claim 1, wherein the solid shaft (304) has longest length and length of the middle hollow shaft is in between length of the solid shaft (304) and the outer hollow shaft (306). 15
3. The multi shaft gear shift tower (300) as claimed in claim 1, wherein the solid shaft (304), the middle hollow shaft (305), and the outer hollow shaft (306) have pulley (301, 302, 303) at top around circular circumference.
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4. The multi shaft gear shift tower (300) as claimed in claim 1, wherein the solid shaft (304), the middle hollow shaft (305), and the outer hollow shaft (306) have lever gear shift and select (LGSS) (308, 309, 310) at bottom.
5. The multi shaft gear shift tower (300) as claimed in claim 1, wherein the 25 pulley (301) of the solid shaft (304) is at top, the pulley (302) of the middle hollow shaft (305) is at middle and the pulley (303) of the outer hollow shaft (306) is at bottom.
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6. The multi shaft gear shift tower (300) as claimed in claim 1, wherein the LGSS (308) of the outer shaft (306) is at top, the LGSS (309) of the middle hollow shaft is at middle, and the LGSS (310) of the solid shaft (304) is at bottom.
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7. A multi shaft gear shift system (MSGSS) (500) for shifting gears in vehicle, the MSGSS (500) comprising:
a multi shaft gear shift tower (300);
a plurality of electric motors (501a, 501b, 501c) connected with pulleys (301, 302, 303) of the multi shaft gear shift tower (300) through belt 10 (401, 402, 407);
a controller (502) connected with the plurality of electric motors (501a, 501b, 501c) through wires; and
a gear shift pedal (505) connected with the controller (502), the gear shift pedal (505) sends input signal to the controller (502), wherein the 15 controller (502) generates, based on the input signal from the gear shift pedal (505), output operating signal for the plurality of electric motors (501a, 501b, 501c), wherein the controller (502) sends the generated operating signals to the plurality of electric motors (501a, 501b, 501c) for shifting of gears. 20
8. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the knob (506) of the gear shift pedal (505) moves in up-shift direction and downshift direction, wherein the up-shift push generates signal for positive gear shifting and the downshift push generates signal for 25 negative gear shifting, the controller (502) receives the signal generated by the gear shift pedal (505).
9. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein 30
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the controller (502), upon receiving signal from the gear shift pedal (505), determines gear selection and generates signal and sends the generated signal to specific electric motor for rotation of corresponding shaft and engagement of selected gear.
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10. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the multi shaft gear shift system (MSGSS) (500) has a reverse gear switch (503) for engagement of reverse gear, wherein the reverse gear switch (503) is connected with the controller (502) for shifting of reverse gear. 10
11. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 10, wherein the reverse gear switch (503) sends reverse gear shifting signal to the controller (502), the controller (502) upon receiving the reverse gear signal sends reverse gear operating signal to fifth and reverse gear shift 15 electric motor (501c) for rotation of the outer hollow shaft (306) and engagement of the reverse gear.
12. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the controller (502) is coupled with a display unit (504) for 20 displaying current gear position.
13. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the plurality of electric motors (501a, 501b, 501c) rotate the shafts (304, 305, 306) through pulley(s) (301, 302, 303) to engage the selected 25 gear.
14. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the plurality of electric motors (501a, 501b, 501c) are three in number. 30
20
15. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the gear shift pedal is provided on the steering wheel.
16. The multi shaft gear shift system (MSGSS) (500) as claimed in claim 7, wherein the multi shaft gear shift system (MSGSS) (500) works in 5 combination with the clutch pedal.