Transmission for power lifting

Abstract

The invention provides a transmission for power lifting, which comprises an outer frame, a power input shaft and a power output shaft, and is characterized in that an input gear, an output gear and a change gear are arranged in the outer frame, and the power input shaft and the input gear, the input gear and the change gear, and the change gear and the output gear are respectively connected with the input gear, the output gear and the change gear. The variable-speed pull rod comprises a horizontal pull rod and a vertical power rod hinged to the horizontal pull rod, the tail end of the vertical power rod is fixed to a rotating shaft of the input gear, the output gear and the variable-speed gear, and the length of the vertical power rod is larger than the radius of the input gear, the radius of the output gear and the radius of the variable-speed gear. The horizontal pull rod can drive the vertical power rod to do forward and reverse alternate curvilinear motion when doing back-and-forth reciprocating linear motion, then the input gear, the output gear and the change gear are driven to do forward rotation and reverse rotation alternate half-cycle rotation, and finally the power output shaft is driven to rotate. The length of the vertical power rod is larger than the radius of the gear, and power lifting is achieved based on the lever principle.

Description

Technical field:

[0001] The present invention relates to the technical field of transmissions, and in particular to a transmission for power enhancement. Background technology:

[0002] The gearbox is a mechanism used to change the speed and torque from the engine. It can change the transmission ratio between the output shaft and the input shaft. The gearbox consists of a speed transmission mechanism and an operating mechanism. The main function of the speed transmission mechanism is to change the value and direction of the torque and speed. Most transmission mechanisms use ordinary gears, and some use planetary gears.

[0003] However, the transmission stability between gears is poor and the service life is short: the gear module, pressure angle, number of teeth and other factors will affect the transmission performance and stability of the gear. At the same time, gears made of different materials and processes will also affect their performance. The lubrication and heat dissipation problems of gear transmission will also significantly affect the transmission efficiency and service life. Moreover, if the speed ratio needs to be adjusted in the existing gearbox, the diameter of the gear needs to be changed, and the adjustment method is complicated and difficult to implement. Summary of the invention:

[0004] In order to change the existing pure gear transmission, thereby improving transmission efficiency, extending service life, simplifying the means of changing the speed ratio, and using the lever principle to realize that the small gear drives the large gear to move, thereby achieving power enhancement, the present invention provides a transmission for power enhancement, including an outer frame, a power input shaft and a power output shaft, wherein a gear pull rod speed change mechanism is arranged inside the outer frame, the gear pull rod speed change mechanism includes an input gear, an output gear and a speed gear arranged between the input gear and the output gear, the power input shaft and the input gear, the input gear and the speed gear, and the speed gear and the output gear are all connected by a speed change pull rod, the speed change pull rod includes a horizontal pull rod and a vertical power rod hinged thereto, the end of the vertical power rod is fixed on the rotating shaft of the input gear, the output gear and the speed gear, and the length of the vertical power rod is greater than the radius of the input gear, the output gear and the speed gear.

[0005] When the horizontal pull rod reciprocates back and forth in a straight line, it can drive the vertical power rod to move in a forward and reverse alternating curved line, thereby driving the input gear, output gear and speed gear to rotate forward and reverse alternatingly in half a circle, and finally driving the power output shaft to rotate.

[0006] Since the length of the vertical power rod is greater than the radius of the input gear, the output gear and the speed gear, based on the lever principle, the power input by the power input shaft can be increased and finally output by the power output shaft.

[0007] The horizontal pull rod includes a power horizontal pull rod, an input wheel horizontal pull rod, a speed wheel horizontal pull rod and an output wheel horizontal pull rod, and the vertical power rod includes a power wheel vertical power rod, an input wheel vertical power rod and a speed wheel vertical power rod.

[0008] The gear pull rod speed change mechanism also includes a primary transmission shaft and a secondary transmission shaft. The primary transmission shaft and the secondary transmission shaft are arranged in parallel front and back. The input gear and the output gear are respectively installed on the two ends of the primary transmission shaft through bearings and can rotate on the primary transmission shaft respectively. The speed change gear is independently installed on the secondary transmission shaft through bearings and can rotate on the secondary transmission shaft.

[0009] An input wheel shaft sleeve is fixedly arranged on the left side surface of the input gear, an output wheel shaft sleeve is fixedly arranged on the left side surface of the output gear, and a speed change wheel shaft sleeve is fixedly arranged on the left side surface of the speed change gear; the power wheel vertical power rod is fixed on the input wheel shaft sleeve, the top end of the power wheel vertical power rod is hinged to the power horizontal pull rod, the end of the power horizontal pull rod is fixedly connected to the power shaft rotating arm, the end of the power shaft rotating arm is fixed on the power input shaft, the input wheel shaft sleeve can rotate forward and reverse alternately under the drive of the power input shaft, thereby driving the input gear to rotate forward and reverse alternately to complete the power input.

[0010] The output wheel shaft sleeve can drive the output gear to rotate, and the speed change wheel shaft sleeve can drive the speed change gear to rotate.

[0011] The input gear is also equipped with an input wheel rack, which meshes with the input gear and can slide back and forth. The end of the input wheel rack is hinged to the input wheel horizontal pull rod, and the end section of the input wheel horizontal pull rod is hinged to one end of the input wheel vertical power rod. The other end of the input wheel vertical power rod is fixed to the speed wheel shaft sleeve. When the input gear rotates forward and reverse alternately, it can drive the input wheel rack and the input wheel horizontal pull rod to move forward and backward, thereby pulling the speed wheel shaft sleeve to rotate forward and reverse alternately. Furthermore, the speed wheel shaft sleeve drives the speed gear to rotate forward and reverse alternately.

[0012] The speed gear is also equipped with a speed wheel rack, which meshes with the speed gear and can slide back and forth. The end of the speed wheel rack is hinged to the speed wheel horizontal pull rod, and the end section of the speed wheel horizontal pull rod is hinged to one end of the speed wheel vertical power rod, and the other end of the speed wheel vertical power rod is fixed to the output wheel shaft sleeve. When the speed gear rotates forward and reverse alternately, it can drive the speed wheel rack and the speed wheel horizontal pull rod to move forward and backward, thereby pulling the output wheel shaft sleeve to rotate forward and reverse alternately. Furthermore, the output wheel shaft sleeve drives the output gear to rotate forward and reverse alternately.

[0013] The output gear is also equipped with an output wheel rack, which meshes with the output gear and can slide back and forth. The end of the output wheel rack is hinged to the output wheel horizontal pull rod, and the end section of the output wheel horizontal pull rod is hinged to one end of the output shaft rotating arm of the power output shaft, and the other end of the output shaft rotating arm is fixed to the end of the power output shaft. When the output gear rotates forward and reverse alternately, it can drive the output wheel rack and the output wheel horizontal pull rod to move forward and backward, thereby driving the power output shaft to rotate, and finally completing the power output.

[0014] The length of the vertical power rod of the power wheel is greater than the radius of the input gear. When the power input shaft drives the input gear to rotate, it is a primary speed-up. The radius of the vertical power rod of the input wheel is greater than the radius of the speed change gear, which is a secondary speed-up. The radius of the vertical power rod of the speed change wheel is greater than the radius of the output gear, which is a tertiary speed-up.

[0015] The input wheel rack, the speed wheel rack and the output wheel rack are all connected to the outer frame through sliding grooves and sliding rails, and the input wheel rack, the speed wheel rack and the output wheel rack can slide back and forth on the sliding rails.

[0016] There is at least one speed gear. When there is one speed gear, the speed gear is independently mounted on the secondary transmission shaft through bearings and can rotate on the secondary transmission shaft. When there are more than one speed gear, the speed gears with odd sequence numbers are respectively mounted on the secondary transmission shaft through bearings and can rotate separately, and the speed gears with even sequence numbers are respectively mounted on the primary transmission shaft through bearings and can rotate separately. The odd-numbered speed gears and the even-numbered speed gears are connected in series in sequence through the speed shift pull rod, and the speed gear mounted on the primary transmission shaft is located between the input gear and the output gear.

[0017] The power input shaft and the power output shaft are both fixed on the outer frame through bearings.

[0018] The power input shaft is externally connected to the rotating shaft of the motor, or externally connected to a small gear matched with the rotating shaft of the motor.

[0019] The power output shaft is externally connected to a device that needs to be driven to operate.

[0020] The power boosting principle of the present invention is as follows:

[0021] When the input gear, output gear or speed gear performs a half-circle reciprocating motion, it drives the subsequent horizontal pull rod to perform a forward and backward reciprocating linear motion, and the horizontal pull rod in turn drives the vertical power rod to perform positive and reverse alternating curved motions, that is, the vertical power rod is equivalent to being driven by the previous gear, and the length of the vertical power rod is greater than the radius of the previous gear. At this time, it is equivalent to using the previous gear with a small diameter to drive the vertical power rod, that is, it is equivalent to using a small gear to drive a large gear to move, completing the power increase. Next, the vertical power rod drives the next gear to move, and because the length of the vertical power rod is greater than the radius of the next gear, it plays a lever role at this time to further increase the power.

[0022] Advantages of the present invention:

[0023] 1. Use the vertical power rod fixed vertically on the gear sleeve to drive the gear to rotate, and make the length of the vertical power rod greater than the radius of the gear. In this way, the lever principle is utilized. When the small gear of the motor inputs a small power, the large gear can be driven to rotate to output a larger output power, thereby achieving power improvement;

[0024] 2. The transmission between gears is cancelled to avoid wear and deviation caused by different pressure angles between the large gear and the small gear, which affects the transmission efficiency;

[0025] 3. The number of speed gears can be increased as needed. Each additional speed gear will increase the speed change, thus improving the speed change capability.

[0026] 4. Control the length of the vertical power rod to adjust the speed ratio without adjusting the gear diameter, which is convenient for adjustment. Description of the drawings:

[0027] Figure 1 This is a structural schematic diagram of the gear pull rod speed change mechanism when the speed change gear is one according to the present invention.

[0028] Figure 2 This is a schematic structural diagram of the gear pull rod speed change mechanism when the number of speed change gears is 7 according to the present invention.

[0029] Figure 3 This is a schematic diagram of the overall structure of the present invention when there are 7 speed change gears.

[0030] Figure ID:

[0031] 1. Outer frame 2. Power input shaft 3. Power output shaft

[0032] 4. Input gear 5, output gear 6, speed change gear 7, horizontal pull rod (not shown in the figure)

[0033] 8. Vertical power rod (not shown in the figure) 9. Primary transmission shaft 10. Secondary transmission shaft 11. Power shaft arm 12. Output shaft arm 13. Slide 14. Slide rail

[0034] 4-1, input wheel bushing 4-2, input wheel rack 5-1, output wheel bushing

[0035] 5-2, output wheel rack 6-1, speed change wheel sleeve 6-2, speed change wheel rack

[0036] 7-1, power horizontal rod 7-2, input wheel horizontal rod 7-3, speed wheel horizontal rod

[0037] 7-4, output wheel horizontal pull rod 8-1, power wheel vertical power rod 8-2, input wheel vertical power rod 8-3, speed change wheel vertical power rod Specific implementation method:

[0038] like Figure 1-Figure 3 As shown, the present invention provides a transmission for power lifting, including an outer frame 1 and a power input shaft 2 and a power output shaft 3, wherein a gear pull rod speed change mechanism is arranged inside the outer frame 1, and the gear pull rod speed change mechanism includes an input gear 4, an output gear 5 and a speed gear 6 arranged between the input gear 4 and the output gear 5, and the power input shaft 2 and the input gear 4, the input gear 4 and the speed gear 6, and the speed gear 6 and the output gear 5 are all connected through a speed change pull rod, and the speed change pull rod includes a horizontal pull rod 7 and a vertical power rod 8 hinged thereto, and the end of the vertical power rod 8 is fixed on the rotating shaft of the input gear 4, the output gear 5 and the speed gear 6, and the length of the vertical power rod 8 is greater than the radius of the input gear 4, the output gear 5 and the speed gear 6.

[0039] When the horizontal pull rod 7 reciprocates back and forth in a straight line, it can drive the vertical power rod 8 to move in a forward and reverse alternating curved line, thereby driving the input gear 4, the output gear 5 and the speed gear 6 to rotate forward and reverse alternatingly by half a circle, and finally driving the power output shaft 3 to rotate.

[0040] Since the length of the vertical power rod 8 is greater than the radius of the input gear 4 , the output gear 5 and the speed gear 6 , based on the lever principle, the power input by the power input shaft 2 can be increased and finally output by the power output shaft 3 .

[0041] The horizontal pull rod 7 includes a power horizontal pull rod 7-1, an input wheel horizontal pull rod 7-2, a speed wheel horizontal pull rod 7-3 and an output wheel horizontal pull rod 7-4, and the vertical power rod 8 includes a power wheel vertical power rod 8-1, an input wheel vertical power rod 8-2 and a speed wheel vertical power rod 8-3.

[0042] The gear pull rod speed change mechanism also includes a primary transmission shaft 9 and a secondary transmission shaft 10. The primary transmission shaft 9 and the secondary transmission shaft 10 are arranged in parallel front and back. The input gear 4 and the output gear 5 are respectively installed on the two ends of the primary transmission shaft 9 through bearings and can rotate on the primary transmission shaft 9 respectively. The speed change gear 6 is independently installed on the secondary transmission shaft 10 through bearings and can rotate on the secondary transmission shaft 10.

[0043] An input wheel shaft sleeve 4 - 1 is fixedly arranged on the left side surface of the input gear 4 , an output wheel shaft sleeve 5 - 1 is fixedly arranged on the left side surface of the output gear 5 , and a speed gear shaft sleeve 6 - 1 is fixedly arranged on the left side surface of the speed gear 6 .

[0044] The power wheel vertical power rod 8-1 is fixed on the input wheel shaft sleeve 4-1, and the top end of the power wheel vertical power rod 8-1 is hinged to the power horizontal pull rod 7-1. The end of the power horizontal pull rod 7-1 is fixedly connected with a power shaft rotating arm 11, and the end of the power shaft rotating arm 11 is fixed on the power input shaft 2. The input wheel shaft sleeve 4-1 can rotate forward and reverse alternately under the drive of the power input shaft 2, thereby driving the input gear 4 to rotate forward and reverse alternately to complete the power input.

[0045] The output wheel shaft sleeve 5 - 1 can drive the output gear 5 to rotate, and the speed change wheel shaft sleeve 6 - 1 can drive the speed change gear 6 to rotate.

[0046] The input gear 4 is also equipped with an input wheel rack 4-2, which is engaged with the input gear 4 and can slide back and forth. The end of the input wheel rack 4-2 is hinged to the input wheel horizontal pull rod 7-2, and the end of the input wheel horizontal pull rod 7-2 is hinged to one end of the input wheel vertical power rod 8-2. The other end of the input wheel vertical power rod 8-2 is fixed on the speed wheel shaft sleeve 6-1. When the input gear 4 rotates forward and reverse alternately, it can drive the input wheel rack 4-2 and the input wheel horizontal pull rod 7-2 to move forward and backward, thereby pulling the speed wheel shaft sleeve 6-1 to rotate forward and reverse alternately. Further, the speed wheel shaft sleeve 6-1 drives the speed gear 6 to rotate forward and reverse alternately.

[0047] The speed gear 6 is also equipped with a speed wheel rack 6-2, which is engaged with the speed gear 6 and can slide back and forth. The end of the speed wheel rack 6-2 is hinged to the speed wheel horizontal pull rod 7-3, and the end section of the speed wheel horizontal pull rod 7-3 is hinged to one end of the speed wheel vertical power rod 8-3. The other end of the speed wheel vertical power rod 8-3 is fixed on the output wheel sleeve 5-1. When the speed gear 6 rotates forward and reverse alternately, it can drive the speed wheel rack 6-2 and the speed wheel horizontal pull rod 7-3 to move forward and backward, thereby pulling the output wheel sleeve 5-1 to rotate forward and reverse alternately. Further, the output wheel sleeve 5-1 drives the output gear 5 to rotate forward and reverse alternately.

[0048] The output gear 5 is also equipped with an output wheel rack 5-2, which is engaged with the output gear 5 and can slide back and forth. The end of the output wheel rack 5-2 is hinged to the output wheel horizontal pull rod 7-4, and the end of the output wheel horizontal pull rod 7-4 is hinged to one end of the output shaft rotating arm 12 of the power output shaft 3. The other end of the output shaft rotating arm 12 is fixed to the end of the power output shaft 3. When the output gear 5 rotates forward and reverse alternately, it can drive the output wheel rack 5-2 and the output wheel horizontal pull rod 7-4 to move forward and backward, thereby driving the power output shaft 3 to rotate, and finally completing the power output.

[0049] The length of the power wheel vertical power rod 8-1 is greater than the radius of the input gear 4. When the power input shaft 2 drives the input gear 4 to rotate, it is a primary speed-up; the radius of the input wheel vertical power rod 8-2 is greater than the radius of the speed change gear 6, which is a secondary speed-up; the radius of the speed change wheel vertical power rod 8-3 is greater than the radius of the output gear 5, which is a tertiary speed-up.

[0050] The input wheel rack 4-2, the speed wheel rack 6-2 and the output wheel rack 5-2 are all connected to the outer frame 1 through the slide groove 13 and the slide rail 14. The input wheel rack 4-2, the speed wheel rack 6-2 and the output wheel rack 5-2 can slide back and forth on the slide rail 14.

[0051] There is at least one speed gear 6. When there is one speed gear 6, the speed gear 6 is independently mounted on the secondary transmission shaft 10 through a bearing and can rotate on the secondary transmission shaft 10. When there are more than one speed gear 6, the speed gears 6 with odd sequence numbers are respectively mounted on the secondary transmission shaft 10 through bearings and can rotate separately, and the speed gears 6 with even sequence numbers are respectively mounted on the primary transmission shaft 9 through bearings and can rotate separately. The odd-numbered speed gears 6 and the even-numbered speed gears 6 are connected in series in sequence through the speed shift pull rod.

[0052] The speed change gear 6 mounted on the primary transmission shaft 9 is located between the input gear 4 and the output gear 5 .

[0053] The power input shaft 2 is externally connected to the rotating shaft of the motor, and the power output shaft 3 is externally connected to the equipment that needs to be driven to operate.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission for power boosting, comprising an outer frame (1), a power input shaft (2) and a power output shaft (3), wherein: A gear pull rod speed change mechanism is arranged inside the outer frame (1), and the gear pull rod speed change mechanism comprises an input gear (4), an output gear (5) and a speed change gear (6) arranged between the input gear (4) and the output gear (5); the power input shaft (2) and the input gear (4), the input gear (4) and the speed change gear (6), and the speed change gear (6) and the output gear (5) are all connected via a speed change pull rod; the speed change pull rod comprises a horizontal pull rod (7) and a vertical power rod (8) hinged thereto; the ends of the vertical power rod (8) are fixed on the rotating shafts of the input gear (4), the output gear (5) and the speed change gear (6), and the length of the vertical power rod (8) is greater than the radius of the input gear (4), the output gear (5) and the speed change gear (6); When the horizontal pull rod (7) moves back and forth in a straight line, it can drive the vertical power rod (8) to move in a forward and reverse alternating curved line, thereby driving the input gear (4), the output gear (5) and the speed gear (6) to rotate in a forward and reverse alternating half-turn, and finally driving the power output shaft (3) to rotate; Since the length of the vertical power rod (8) is greater than the radius of the input gear (4), the output gear (5) and the speed gear (6), based on the lever principle, the power input by the power input shaft (2) can be increased and finally output by the power output shaft (3).

2. A transmission for power boosting according to claim 1, characterized in that: The horizontal pull rod (7) further comprises a power horizontal pull rod (7-1), an input wheel horizontal pull rod (7-2), a speed wheel horizontal pull rod (7-3) and an output wheel horizontal pull rod (7-4), and the vertical power rod (8) further comprises a power wheel vertical power rod (8-1), an input wheel vertical power rod (8-2) and a speed wheel vertical power rod (8-3).

3. A transmission for power boosting according to claim 1, characterized in that: The gear pull rod speed change mechanism also includes a primary transmission shaft (9) and a secondary transmission shaft (10); the primary transmission shaft (9) and the secondary transmission shaft (10) are arranged in parallel in front and back; the input gear (4) and the output gear (5) are respectively mounted on the two ends of the primary transmission shaft (9) through bearings and can rotate on the primary transmission shaft (9) respectively; the speed change gear (6) is independently mounted on the secondary transmission shaft (10) through bearings and can rotate on the secondary transmission shaft (10).

4. A transmission for power boosting according to claim 2, characterized in that: An input wheel shaft sleeve (4-1) is fixedly arranged on the left side surface of the input gear (4), an output wheel shaft sleeve (5-1) is fixedly arranged on the left side surface of the output gear (5), and a speed change wheel shaft sleeve (6-1) is fixedly arranged on the left side surface of the speed change gear (6); The power wheel vertical power rod (8-1) is fixed on the input wheel shaft sleeve (4-1), the top end of the power wheel vertical power rod (8-1) is hinged to the power horizontal pull rod (7-1), the end of the power horizontal pull rod (7-1) is fixedly connected to a power shaft rotating arm (11), the end of the power shaft rotating arm (11) is fixed on the power input shaft (2), and the input wheel shaft sleeve (4-1) can rotate forward and reverse alternately under the drive of the power input shaft (2), thereby driving the input gear (4) to rotate forward and reverse alternately to complete power input; The output wheel shaft sleeve (5-1) can drive the output gear (5) to rotate, and the speed change wheel shaft sleeve (6-1) can drive the speed change gear (6) to rotate.

5. A transmission for power boosting according to claim 4, characterized in that: The input gear (4) is also equipped with an input wheel rack (4-2), the input wheel rack (4-2) is engaged with the input gear (4) and can slide forward and backward, the end of the input wheel rack (4-2) is hinged to the input wheel horizontal pull rod (7-2), the end of the input wheel horizontal pull rod (7-2) is hinged to one end of the input wheel vertical power rod (8-2), the other end of the input wheel vertical power rod (8-2) is fixed to the speed change wheel shaft sleeve (6-1), when the input gear (4) rotates forward and reverse alternately, it can drive the input wheel rack (4-2) and the input wheel horizontal pull rod (7-2) to move forward and backward, thereby pulling the speed change wheel shaft sleeve (6-1) to rotate forward and reverse alternately, and further, the speed change wheel shaft sleeve (6-1) drives the speed change gear (6) to rotate forward and reverse alternately.

6. A transmission for power boosting according to claim 5, characterized in that: The speed gear (6) is also equipped with a speed wheel rack (6-2), the speed wheel rack (6-2) is engaged with the speed gear (6) and can slide forward and backward, the end of the speed wheel rack (6-2) is hinged to the speed wheel horizontal pull rod (7-3), the end of the speed wheel horizontal pull rod (7-3) is hinged to one end of the speed wheel vertical power rod (8-3), and the other end of the speed wheel vertical power rod (8-3) is fixed to the output wheel shaft sleeve (5-1), and the speed gear (6) can drive the speed wheel rack (6-2) and the speed wheel horizontal pull rod (7-3) to move forward and backward when rotating in a forward and reverse direction, thereby pulling the output wheel shaft sleeve (5-1) to rotate in a forward and reverse direction, and further, the output wheel shaft sleeve (5-1) drives the output gear (5) to rotate in a forward and reverse direction.

7. A transmission for power boosting according to claim 6, characterized in that: The output gear (5) is also equipped with an output wheel rack (5-2), the output wheel rack (5-2) is engaged with the output gear (5) and can slide forward and backward, the end of the output wheel rack (5-2) is hinged to the output wheel horizontal pull rod (7-4), the end of the output wheel horizontal pull rod (7-4) is hinged to one end of the output shaft rotating arm (12) of the power output shaft (3), and the other end of the output shaft rotating arm (12) is fixed to the end of the power output shaft (3), and the output gear (5) can drive the output wheel rack (5-2) and the output wheel horizontal pull rod (7-4) to move forward and backward when rotating alternately in forward and reverse directions, thereby driving the power output shaft (3) to rotate, and finally completing power output.

8. A transmission for power boosting according to claim 7, characterized in that: The length of the power wheel vertical power rod (8-1) is greater than the radius of the input gear (4), and when the power input shaft (2) drives the input gear (4) to rotate, it is a one-time speed increase; The radius of the input wheel vertical power rod (8-2) is greater than the radius of the speed change gear (6), which is a secondary speed increase; The radius of the speed-changing wheel vertical power rod (8-3) is greater than the radius of the output gear (5), which is a three-fold speed increase.

9. A transmission for power boosting according to claim 7, characterized in that: The input wheel rack (4-2), the speed wheel rack (6-2) and the output wheel rack (5-2) are all connected to the outer frame (1) via a slide groove (13) and a slide rail (14); the input wheel rack (4-2), the speed wheel rack (6-2) and the output wheel rack (5-2) can slide forward and backward on the slide rail (14).

10. A transmission for power boosting according to claim 3, characterized in that: There is at least one speed gear (6). When there is one speed gear (6), the speed gear (6) is independently mounted on the secondary transmission shaft (10) via a bearing and can rotate on the secondary transmission shaft (10). When there are more than one speed gear (6), the speed gears (6) with odd sequence numbers are respectively mounted on the secondary transmission shaft (10) via bearings and can rotate separately, and the speed gears (6) with even sequence numbers are respectively mounted on the primary transmission shaft (9) via bearings and can rotate separately. The odd-numbered speed gears (6) and the even-numbered speed gears (6) are sequentially connected in series via the speed change pull rod. A speed change gear (6) mounted on the primary transmission shaft (9) is located between the input gear (4) and the output gear (5).

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