Pulse type stepless speed change device

Abstract

The utility model discloses a pulse type stepless speed change device which comprises a main shaft, an outer ring a, a mounting seat, an inner gear, a fixing plate a, a fixing plate b, an output ratchet wheel, a fluted disc a, a fluted disc b and an outer ring b are sequentially mounted on the main shaft, a chain wheel is arranged on the surface of the mounting seat, a tooth groove a formed in the inner side of the inner gear is meshed with the gear a, and a speed regulating mechanism is arranged on the gear a. The output end of the speed regulating mechanism is meshed with the output ratchet wheel, the fluted disc a is fixedly installed on the side face of the output ratchet wheel, the fluted disc b is meshed with the fluted disc a and installed on the side face of the shell a, and the other side of the shell a is connected with the shell b. Compared with an existing transmission mode of changing the friction radius with a ball body, the device adopts gear meshing transmission, slipping is avoided, the transmission efficiency is improved, meanwhile, the structure is simple, the manufacturing cost is low, and an existing bicycle transmission on the market can be directly replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to stepless speed change technical field, especially a pulsating stepless speed change device. BACKGROUND

[0002] With the continuous iteration of the transmission, the CVT stepless speed change is outstanding in the civil vehicle market with its excellent fuel economy and ride comfort, gradually replacing the original step transmission, and is often configured on small displacement cars, pedal motorcycles and part of high-end bicycles.

[0003] The main step transmission on the bicycle is the chain wheel disc step transmission of the brand such as Shimano and the derivative product thereof, and a small part of bicycles are provided with the NuVinci stepless speed change planetary transmission device, which transmits the speed between the driving disc and the driven disc through a group of small balls, the center of the frame fixing the group of small balls can be moved left and right, so that the axis of the ball forms an angle, so that the small balls of the left and right contact points have different rotating circumferences, forming a speed ratio, and the angle control of the group of small balls is stepless, so that the overall stepless speed change is realized, but the main principle of the device is to change the friction radius transmission with the ball, which is easy to slip, the transmission efficiency is low, the cost is high, and it is difficult to popularize, and is often arranged on high-end bicycles and the like. SUMMARY

[0004] The utility model aims at overcoming the defects of prior art, and provides a pulsating stepless speed change device.

[0005] The utility model discloses a pulsating stepless speed change device, including the main shaft, the outer ring a is installed on the main shaft in proper order, and the mounting seat, the inner gear, the fixed plate a, the fixed plate b, the output ratchet wheel, the tooth disc a, the tooth disc b and the outer ring b, are provided with the chain wheel on the mounting seat surface, and the tooth groove a of the inner gear inside is engaged with the gear a, and the gear a side surface is installed on the gyroscope, is provided with the speed regulation mechanism in the gyroscope, and the output end of speed regulation mechanism is engaged with the output ratchet wheel, and the tooth disc a is fixedly installed on the side of output ratchet wheel, and the tooth disc b is engaged with the tooth disc a, and the tooth disc b is installed on the side of shell a, and the other side of shell a is connected with shell b.

[0006] Preferably, the mounting seat includes an inner ring and an outer ring, the inner ring is installed on the main shaft, a threaded section is formed at one end of the outer surface of the inner ring, a threaded section corresponding to the threaded section is formed on the inner surface of the outer ring, a limiting groove is formed on the outer surface of the outer ring, and protrusions are formed on the inner sides of the chain wheel and the inner gear, and the protrusions are located in the limiting groove.

[0007] Preferably, the speed regulating mechanism comprises a bevel gear a, bearing mounting holes are correspondingly arranged on the fixed plate a and the fixed plate b, a rotating body is mounted in the bearing mounting holes through bearings, the bevel gear a is located in the rotating body, the bevel gear a is engaged with a bevel gear b, a speed regulating screw is arranged on one side of the bevel gear b, a sliding block is spirally mounted on the speed regulating screw, a containing cavity a and a containing cavity b are arranged on the rotating body, the bevel gear b is located in the containing cavity a, the speed regulating screw is located in the containing cavity b, and a sliding groove is arranged at the upper end of the containing cavity b, the upper end sides of the sliding block are located in the sliding groove, a connecting rod is mounted on the sliding block, and an output mechanism is mounted on the connecting rod.

[0008] Preferably, the output mechanism comprises a force arm a and a force arm b, the force arm a and the force arm b are arranged in an up-down distribution and are rotationally mounted on the surface of the connecting rod, circular holes are arranged at the ends of the force arm a and the force arm b, return springs are arranged in the circular holes, the return springs are sleeved on the outer sides of rotating shafts a and b, bearings are mounted at the two ends of the rotating shafts a and b, and half helical gears are arranged at the upper ends of the rotating shafts a and b and engaged with tooth grooves c on an output ratchet wheel.

[0009] Preferably, a circular arc groove a is arranged on the surface of the fixed plate b, a circular arc groove b is arranged on the output ratchet wheel, the tooth grooves c are located in the circular arc groove b, the upper end bearings are located in the circular arc groove b, and the lower end bearings are located in the circular arc groove a.

[0010] Preferably, a rotating shaft c penetrates through the outer end of the side surface of the fixed plate b and the fixed plate a, bearings b are arranged at the two ends of the rotating shaft c, and the bearings b are in contact with the inner surfaces of the housings a and b.

[0011] Preferably, a clutch finger dial is arranged on the outer ring b, one end of the outer ring b abuts against the toothed disc a, the other end of the outer ring b is provided with a limiting plate, and the limiting plate is fixedly mounted on the main shaft.

[0012] Preferably, a stepped hole is arranged on the output ratchet wheel, and a sliding block b corresponding to the stepped hole is arranged on the side surface of the toothed disc a.

[0013] Preferably, a handle finger dial is arranged on the outer ring a, a shaft sleeve is movably mounted on the main shaft, a moving plate is arranged at one end of the shaft sleeve, a protrusion b is arranged at the other side of the moving plate, and a protrusion c corresponding to the protrusion b is arranged on the side surface of the bevel gear a.

[0014] Preferably, a plurality of mounting holes are arranged on the outer sides of the housings a and b.

[0015] This invention has the following advantages: The power is input to the mounting base via the rider pedaling and the sprocket, then transmitted to the internal gear. The internal gear meshes with gear a, causing the speed regulating mechanism to rotate. During rotation, its output end drives the output ratchet to rotate, which in turn drives the outer shells a and b to rotate, thus rotating the wheel. This device uses gear meshing transmission, which, compared to existing transmission methods that change the friction radius with the ball, avoids slippage and improves transmission efficiency. Furthermore, it has a simple structure, low cost, and can directly replace existing bicycle derailleurs on the market. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of a pulse-type continuously variable transmission (CVT).

[0017] Figure 2 A schematic diagram showing the positional relationship of outer ring a, mounting base, internal gear, fixed plate a, fixed plate b, output ratchet, gear disc a, gear disc b, and outer ring b on the spindle;

[0018] Figure 3 This is a schematic diagram of the output mechanism;

[0019] Figure 4 This is a schematic diagram of the structure of a rotating body;

[0020] Figure 5 This is a schematic diagram of the speed regulating mechanism;

[0021] Figure 6 This is a schematic diagram of the output ratchet.

[0022] Figure 7 A schematic diagram showing the positional relationship between the outer ring a, the bushing, and the moving plate;

[0023] Figure 8 This is a schematic diagram of the power output curve.

[0024] In the diagram, 1-main shaft, 2-outer shell b, 3-outer shell a, 4-outer ring a, 5-outer ring b, 6-clutch finger, 7-mounting seat, 8-sprocket, 9-internal gear, 10-fixed plate a, 11-fixed plate b, 12-output ratchet, 13-gear a, 14-gear b, 15-circular groove a, 16-bearing b, 17-shaft a, 18-semi-helical gear, 19-lever b, 20-lever a, 21-connecting rod, 23-tooth groove a, 24-gear a, 25-bevel gear a, 26-bevel gear b, 27-speed regulating screw, 28-slider, 29-rotating body, 30-slide groove, 31-accommodating cavity b, 33-tooth groove c, 34-shaft sleeve, 35-moving plate, 36-protrusion b, 37-protrusion c. Detailed Implementation

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present embodiment, asFigure 1 and Figure 2 As shown in the figure, a pulsating continuously variable transmission device includes a main shaft 1, an outer ring a4, a mounting seat 7, an inner gear 9, a fixed plate a10, a fixed plate b11, an output ratchet 12, a toothed disc a13, a toothed disc b14 and an outer ring b5 are sequentially installed on the main shaft 1, the mounting seat 7 is provided with a sprocket 8 on the surface, further, the mounting seat 7 includes an inner ring and an outer ring, the inner ring is installed on the main shaft 1, a threaded section is formed at one end of the outer surface of the inner ring, a threaded section corresponding to the threaded section is formed on the inner surface of the outer ring, a limiting groove is formed on the outer surface of the outer ring, the inner side of the sprocket 8 and the inner side of the inner gear 9 are provided with protrusions, and the protrusions are located in the limiting groove. The tooth groove a23 formed in the inner side of the inner gear 9 is engaged with the gear a24, the gear a24 is installed on the side surface of the rotary body 29, a speed regulating mechanism is arranged in the rotary body 29, the output end of the speed regulating mechanism is engaged with the output ratchet 12, the toothed disc a13 is fixedly installed on the side surface of the output ratchet 12, and the toothed disc b14 is engaged with the toothed disc a13, the toothed disc b14 is installed on the side surface of the shell a3, and the other side of the shell a3 is connected with the shell b2. Further, a plurality of mounting holes are arranged on the outer side of the shell a3 and the shell b2. Specifically, a plurality of threaded sections are arranged on the surface of the main shaft 1 for corresponding installation of various components, the two ends of the main shaft 1 are fixedly installed on the rear wheel frame of the bicycle and locked by nuts to prevent rotation, the shell a3 and the shell b2 can rotate around the main shaft 1, a plurality of spokes are installed in the mounting holes arranged on the outer side of the shell a3 and the shell b2, and the other end of the spokes is connected with an outer wheel to form a rear wheel drum type continuously variable transmission device. That is to say, the rider pedals the pedal and inputs power to the mounting seat 7 through the sprocket 8, then transmits the power to the inner gear 9, the inner gear 9 rotates the speed regulating mechanism by engaging with the gear a24, the output end of the speed regulating mechanism drives the output ratchet 12 to rotate in the rotating process, and finally the shell a3 and the shell b2 are driven to rotate through the cooperation of the toothed disc a13 and the toothed disc b14, thereby driving the wheel to rotate. The device transmits power through gear engagement, which avoids slipping and improves transmission efficiency compared with the existing friction radius transmission mode of changing the ball, and has the advantages of simple structure, low cost and direct replacement of the existing bicycle transmission on the market.

[0032] In this embodiment, as Figures 3-5As shown, the speed regulating mechanism comprises a bevel gear a25, bearing mounting holes are correspondingly formed on the fixed plate a10 and the fixed plate b11, a rotating body 29 is mounted in the bearing mounting holes through bearings, the bevel gear a25 is located in the rotating body 29, the bevel gear a25 is engaged with a bevel gear b26, one side of the bevel gear b26 is provided with a speed regulating screw 27, a sliding block 28 is spirally mounted on the speed regulating screw 27, the rotating body 29 is provided with a containing cavity a and a containing cavity b 31, the bevel gear b26 is located in the containing cavity a, the speed regulating screw 27 is located in the containing cavity b 31, and the upper end of the containing cavity b 31 is provided with a sliding groove 30, the upper end of the sliding block 28 is located in the sliding groove 30, a connecting rod 21 is mounted on the sliding block 28, and an output mechanism is mounted on the connecting rod 21. Specifically, the rotating body 29 is mounted in the bearing mounting holes through bearings, so that it can rotate axially around itself, the bevel gear a25 is located in the square notch of the rotating body 29, so that the bevel gear a25 moves radially on the rotating body 29, the speed regulating screw 27 is matched with the bevel gear b26 through a trapezoidal thread structure, and the self-locking force generated by the trapezoidal thread matching can drive the sliding block 28 to move along the sliding groove 30 when the speed regulating screw 27 rotates, so as to drive the output mechanism to move synchronously. Further, as shown in the figure, Figure 7 As shown, the outer ring a4 is provided with a handle finger dial, the shaft sleeve 34 is movably mounted on the main shaft 1, one end of the shaft sleeve 34 is provided with a moving plate 35, the other side of the moving plate 35 is provided with a protrusion b 36, and the side surface of the bevel gear a25 is provided with a protrusion c 37 corresponding to the protrusion b 36. Specifically, when the handle finger dial is pulled to drive the outer ring a4 to rotate, the outer ring a4 drives the shaft sleeve 34 to move along the bevel gear a25 in the rotating process, since the side surface of the bevel gear a25 is provided with the protrusion c 37 corresponding to the protrusion b 36, the protrusion b 36 and the protrusion c 37 will be clamped with each other, so as to avoid the bevel gear a25 and the rotating body 29 from rotating together, at this time, when the foot pedal is stepped forward, the sprocket 8 is driven to rotate, and the power is transmitted to the rotating body 29, so that the rotating body 29 rotates around itself, since the bevel gear a25 is clamped and limited to rotate at this time, the speed regulating screw 27 rotates, and the sliding block 28 moves away from the rotation center, so as to increase the rotation radius of the sliding block 28, that is, to increase the transmission ratio, and the rotation radius of the sliding block 28 is reduced if the foot pedal is reversed, so as to reduce the transmission ratio.

[0033] In the embodiment, as shown in the figure, Figure 6As shown, the output mechanism includes force arm a20 and force arm b19, which are arranged in an up-down distribution and are rotatably mounted on the surface of connecting rod 21. The ends of force arm a20 and force arm b19 are provided with circular holes, and a return spring is arranged in the circular holes. The return spring is sleeved on the outer side of rotating shaft a17 and rotating shaft b. The two ends of rotating shaft a17 and rotating shaft b are both provided with bearings, and the upper ends of rotating shaft a17 and rotating shaft b are provided with half helical gears 18, which are engaged with tooth grooves c33 on the output ratchet wheel 12. Specifically, rotating shaft a17 and rotating shaft b are respectively arranged in the circular holes of the corresponding force arms, so that rotating shaft a17 and rotating shaft b can simultaneously perform rotational movement and axial movement in the circular holes. The return spring is sleeved on the outer side of rotating shaft a17 and rotating shaft b. The main function of the return spring is to return rotating shaft a17 and rotating shaft b. Since the half helical gears 18 are engaged with the tooth grooves c33 on the output ratchet wheel 12, rotating shaft a17 will drive the output ratchet wheel 12 to rotate in one direction during rotation. Simultaneously, the toothed disc a13 is fixedly arranged on the side of the output ratchet wheel 12, so as to drive the toothed disc a13 to rotate. The toothed disc b14 is engaged with the toothed disc a13, so as to drive the toothed disc a13 and the toothed disc b14 to synchronously rotate. The toothed disc b14 is arranged on the side of the shell a3. The other side of the shell a3 is connected with the shell b2, so as to drive the shell a3 and the shell b2 to synchronously rotate, and further drive the wheels to rotate. Further, the surface of the fixed plate b11 is provided with a circular arc groove a15, and the output ratchet wheel 12 is provided with a circular arc groove b. The tooth grooves c33 are located in the circular arc groove b, and the upper end bearing is located in the circular arc groove b, and the lower end bearing is located in the circular arc groove a15. Specifically, the main function of the circular arc groove a15 and the circular arc groove b is to limit the movement of the bearing, so that the bearing can only move in the circular arc groove.

[0034] In the embodiment, the fixed plate b11 and the fixed plate a10 are penetrated by rotating shaft c at the outer end of the side surface. The two ends of the rotating shaft c are provided with bearings b16, which are in contact with the inner surfaces of the shell a3 and the shell b2. Specifically, the main function of the bearing b16 is to cooperate with the shell a3 and the shell b2 to rotate.

[0035] Further, the outer ring b5 is provided with a clutch finger dial 6. One end of the outer ring b5 abuts against the toothed disc a13, and the other end of the outer ring b5 is provided with a limiting plate, which is fixedly arranged on the main shaft 1. Further, the output ratchet wheel 12 is provided with a stepped hole, and the side surface of the toothed disc a13 is provided with a sliding block b corresponding to the stepped hole. Specifically, the outer ring b5 is driven to rotate by the clutch finger dial 6. Since the outer ring b5 is helically arranged on the main shaft 1, the outer ring b5 will move axially along the main shaft 1 during rotation, thereby pushing the toothed disc a13, so as to disengage the toothed disc a13 and the toothed disc b14, thereby achieving the function of disengaging the output power and the shell.

[0036] The power transmission process of the utility model is as follows: the rider pedals the pedal and inputs power to the mounting seat 7 through the chain wheel 8, then transmits power to the internal gear 9, the internal gear 9 rotates through meshing with the gear a 24, the gear a 24 is installed on the rotary body 29, so that the rotary body 29 rotates, the bevel gear b 26 rotates to drive the speed regulating screw 27 to rotate, the speed regulating screw 27 is matched with the bevel gear b 26 through the trapezoidal thread structure, the self-locking force generated by the trapezoidal thread matching enables the speed regulating screw 27 to drive the sliding block 28 to move along the sliding groove 30 when rotating, thereby driving the force arm a 20 and the force arm b 19 to swing, enabling the bearings at the two ends of the shaft a 17 and the shaft b to make circular reciprocating swing in the circular arc groove, since the half helical gear 18 meshes with the tooth groove c 33 on the output ratchet wheel 12, the shaft a 17 drives the output ratchet wheel 12 to rotate in one direction during the rotation process, at the same time, the toothed disc a 13 is fixedly installed on the side of the output ratchet wheel 12, thereby driving the toothed disc a 13 to rotate, the toothed disc b 14 meshes with the toothed disc a 13, enabling the toothed disc a 13 and the toothed disc b 14 to rotate synchronously, the toothed disc b 14 is installed on the side of the shell a 3, the other side of the shell a 3 is connected with the shell b 2, thereby enabling the shell a 3 and the shell b 2 to rotate synchronously, and further enabling the wheel to rotate; the outer ring b 5 is driven to rotate through the clutch finger dial 6, since the outer ring b 5 is spirally installed on the main shaft 1, the outer ring b 5 moves axially along the main shaft 1 during the rotation process, thereby pushing the toothed disc a 13, and enabling the toothed disc a 13 and the toothed disc b 14 to disengage, so that the output power and the shell are disconnected, and the shell can rotate freely in the positive and negative directions.

[0037] The utility model discloses the pulse output principle as follows: through setting four groups of force arm and output ratchet wheel 12 cooperation, same time period only one group swing fastest shaft and output ratchet wheel 12 cooperation transmission power, force arm swing arc length calculation formula is:

[0038] ;

[0039] Among them, Swing arc length, Rotary radius of sliding block, Rotary angle of rotary body, because same time period only one group swing fastest shaft and output ratchet wheel 12 cooperation transmission power, then four groups of shafts only mesh Angle respectively, so simplify four groups of arc length formula as:

[0040] When , ;

[0041] When , ;

[0042] When , ;

[0043] when hour, ;

[0044] The power output curve derived from the above formula is as follows: Figure 8 As shown, the pulsation curve can be smoothed by setting the internal gear 9 and gear a24 to be in elliptical gear engagement, thus reducing the curvature of the output curve and making the transmission curve smoother.

[0045] The continuously variable transmission principle of this invention is as follows: It can be seen from the calculation formula that by adjusting the rotation radius of the slider 28 in the rotating body 29... The swing arc length of the lever arm can be controlled, thereby achieving stepless speed regulation. When the finger pulls the lever to rotate the outer ring a4, the outer ring a4 will drive the bushing 34 to move along the bevel gear a25 during the rotation. Since the side of the bevel gear a25 is provided with a protrusion c37 corresponding to the protrusion b36, the protrusion b36 and the protrusion c37 will lock each other, thereby preventing the bevel gear a25 and the rotating body 29 from rotating together. When the foot pedal is pressed forward, the sprocket 8 is driven to rotate, and the power is transmitted to the rotating body 29, causing the rotating body 29 to rotate around itself. Since the bevel gear a25 is locked and its rotation is restricted, the speed regulating screw 27 rotates and drives the slider 28 away from the center of rotation, thereby increasing the rotation radius of the slider 28, that is, increasing the transmission ratio. Similarly, if the foot pedal is reversed, the rotation radius of the slider 28 will be reduced, thereby reducing the transmission ratio.

[0046] The functions and operation instructions of this utility model are as follows:

[0047] Forward movement: When you pedal forward or backward, the wheels rotate forward.

[0048] Forward overtaking function: When the foot pedal is stationary, the wheel can rotate freely forward, but cannot rotate backward;

[0049] Reverse overtaking function: With the foot pedal stationary, pulling clutch lever 6 allows the wheel to rotate freely forward and backward;

[0050] Manual speed adjustment function: Pull the lever with your finger and turn the foot pedal forward to increase the gear ratio; turn the foot pedal backward to decrease the gear ratio.

[0051] Changing the gear ratio while parking: Pull the lever finger and clutch finger 6 simultaneously, and turn the foot pedal. When changing the gear ratio, the wheels will not turn. The main purpose of this function is to reduce the gear ratio when parking, which makes restarting more difficult. However, existing gear transmissions cannot change the gear ratio when parking.

[0052] In another embodiment, when needed for a scooter, the shell a2 and the shell b3 are removed, the transmission power input shaft and the engine output shaft are directly connected, the transmission output shaft is directly connected through a chain wheel or a belt wheel and a rear wheel, the whole continuously variable transmission device is directly installed on the rear wheel shaft, the existing transmission is removed, and the engine output shaft is directly connected through a chain wheel.

[0053] When needed for a car, the shell a2 and the shell b3 are removed, an existing electronic control system is increased to intelligently adjust the speed, and then the engine output shaft is connected, and power transmission is performed again.

[0054] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A pulse type continuously variable transmission characterized by: Includes a main shaft (1), on which are installed in sequence an outer ring a (4), a mounting seat (7), an internal gear (9), a fixing plate a (10), a fixing plate b (11), an output ratchet (12), a gear plate a (13), a gear plate b (14) and an outer ring b (5). A sprocket (8) is provided on the surface of the mounting seat (7). The tooth groove a (23) opened on the inner side of the internal gear (9) meshes with the gear a (24). The side of the gear a (24) is mounted on a rotating body (29). A speed regulating mechanism is provided in the rotating body (29). The output end of the speed regulating mechanism meshes with the output ratchet (12). The gear plate a (13) is fixedly mounted on the side of the output ratchet (12), and the gear plate b (14) meshes with the gear plate a (13). The gear plate b (14) is mounted on the side of the outer shell a (3). The other side of the outer shell a (3) is connected to the outer shell b (2).

2. The pulse-type continuously variable transmission device according to claim 1, characterized by: The mounting base (7) includes an inner ring and an outer ring. The inner ring is mounted on the main shaft (1). One end of the outer surface of the inner ring is provided with a threaded section. The inner surface of the outer ring is provided with a corresponding threaded section. A limiting groove is provided on the outer surface of the outer ring. The inner side of the sprocket (8) and the internal gear (9) are provided with protrusions. The protrusions are located in the limiting groove.

3. The pulse-type continuously variable transmission device according to claim 2, characterized by: The speed regulating mechanism includes a bevel gear a (25). Bearing mounting holes are correspondingly provided on the fixed plate a (10) and the fixed plate b (11). The rotating body (29) is mounted in the bearing mounting holes via bearings. The bevel gear a (25) is located inside the rotating body (29). The bevel gear a (25) meshes with the bevel gear b (26). A speed regulating screw (27) is provided on one side of the bevel gear b (26). A sliding screw is helically mounted on the speed regulating screw (27). The block (28) has a receiving cavity a and a receiving cavity b (31) on the rotating body (29). The bevel gear b (26) is located in the receiving cavity a, the speed regulating screw (27) is located in the receiving cavity b (31), and the upper end of the receiving cavity b (31) is provided with a sliding groove (30). The upper ends of the slider (28) are located in the sliding groove (30) on both sides. A connecting rod (21) is installed on the slider (28), and an output mechanism is installed on the connecting rod (21).

4. The pulse-type continuously variable transmission device according to claim 3, characterized by: The output mechanism includes lever arm a (20) and lever arm b (19), which are distributed vertically and rotatably mounted on the surface of the connecting rod (21). The ends of lever arm a (20) and lever arm b (19) are provided with circular holes, and return springs are provided in the circular holes. The return springs are fitted on the outside of rotating shaft a (17) and rotating shaft b. Bearings are installed at both ends of rotating shaft a (17) and rotating shaft b. Semi-helical teeth (18) are provided at the upper ends of rotating shaft a (17) and rotating shaft b. The semi-helical teeth (18) mesh with the tooth groove c (33) on the output ratchet (12).

5. The pulse-type continuously variable transmission device according to claim 4, characterized by: The fixed plate b (11) is provided with a circular arc groove a (15), the output ratchet (12) is provided with a circular arc groove b, the tooth groove c (33) is located in the circular arc groove b, the upper end bearing is located in the circular arc groove b, and the lower end bearing is located in the circular arc groove a (15).

6. The pulse width modulated continuously variable transmission of claim 5 wherein: The fixed plate b (11) is provided with a circular arc groove a (15), the output ratchet (12) is provided with a circular arc groove b, the tooth groove c (33) is located in the circular arc groove b, the upper end bearing is located in the circular arc groove b, and the lower end bearing is located in the circular arc groove a (15).

7. The pulse-type continuously variable transmission device according to claim 1, characterized by: The outer ring b (5) is provided with a clutch finger dial (6), one end of the outer ring b (5) is abutted on the toothed disc a (13), the other end of the outer ring b (5) is provided with a limiting plate, and the limiting plate is fixedly installed on the main shaft (1).

8. The pulse width modulated continuously variable transmission of claim 7 wherein: The output ratchet (12) is provided with a stepped hole, and the side of the toothed disc a (13) is provided with a sliding block b corresponding to the stepped hole.

9. The pulse-type continuously variable transmission device according to claim 3, characterized by: The outer ring a (4) is provided with a handle finger dial, the main shaft (1) is movably provided with a shaft sleeve (34), one end of the shaft sleeve (34) is provided with a moving plate (35), the other side of the moving plate (35) is provided with a protrusion b (36), and the side of the bevel gear a (25) is provided with a protrusion c (37) corresponding to the protrusion b (36).

10. The pulse-type continuously variable transmission device according to claim 1, characterized by: The outer side of the shell a (3) and the shell b (2) is provided with a plurality of mounting holes.

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