Non-friction pulseless stepless speed change device

Abstract

The invention discloses a non-friction pulseless stepless speed change device which comprises a box body, an input mechanism, a speed regulating mechanism and an output mechanism. The input mechanism adopts a cam-connecting rod-gear mechanism, converts rotary motion into reciprocating linear motion, and is mounted at the front end of the box body; the output mechanism adopts a combined structure of a gear rack mechanism and a ratchet mechanism, converts reciprocating linear motion into unidirectional rotary motion, and is mounted at the rear end of the box body; and the speed regulating mechanism adopts a servo motor for speed regulation, is mounted in the middle of the box body and is connected with the input mechanism and the output mechanism respectively. The characteristic that the cam mechanism can meet special movement requirements is utilized, conversion of different movement modes is achieved, the purpose of uniform speed regulation is achieved, and the device has the advantages of being simple in structure, compact, high in efficiency and the like.

Description

Technical Field

[0001] The invention relates to the technical field of a continuously variable transmission device, and in particular to the research of a non-frictional, pulsation-free continuously variable transmission device. Background Art

[0002] The continuously variable transmission is a universal transmission device that adapts to the mechanization and automation development of modern production processes and improves the working performance of machinery. Many different forms of continuously variable transmissions can be obtained by different choices of the speed regulating devices of the input and output converters. Due to the limitations of their structural principles and performance, the following defects are common: the inertia force of the connecting rod in the pulsating continuously variable transmission is difficult to balance during movement, and the vibration caused by this will increase significantly at high speeds, while generating a lot of noise; the friction type continuously variable transmission has poor starting performance, low transmission efficiency, difficulty in manufacturing, and high price. Therefore, a non-friction non-pulsating continuously variable transmission is designed to improve the problem that the inertia force of the connecting rod in the pulsating continuously variable transmission is difficult to balance during movement and the transmission efficiency is low in the friction type continuously variable transmission. It has the advantages of simple structure, easy manufacturing and processing, easy maintenance, and low production cost. Summary of the invention

[0003] The technical solution adopted by the present invention to solve the above technical problems is: a non-friction type pulsation-free continuously variable transmission device, the present invention comprises a housing, an input mechanism, a speed regulating mechanism and an output mechanism; the housing is fixed by bolts; the input mechanism is installed inside the housing by bolts and screws; the speed regulating mechanism is fixedly connected to the input mechanism by bolts; the output mechanism is installed inside the housing by bolts and screws;

[0004] The box body includes a box seat, a box cover, a bearing and an end cover; the box seat and the box cover are fixedly connected by bolts, the four bearings are respectively installed in the bearing holes on the side of the box seat, and the end cover is installed on the outside of the box seat by bolts;

[0005] The input mechanism includes an input shaft, an input end guide rail, an input end support, an input end slider, an input end guide shaft, an input end sliding seat, a support plate, a cam groove plate, an input end rack, a crank, a crank pressure block, an input end cam follower and an incomplete gear; the two ends of the input shaft are respectively installed in two bearings to form a rotating pair; the input end guide rail is fixedly installed on the inner side of the box seat; the two input end supports are fixedly installed on the inner side of the box seat; the input end slider is sleeved on the input end guide rail to form a moving pair; the two ends of the input end guide shaft are respectively installed in the two input end supports, and the input end sliding seat is sleeved A moving pair is formed on the input end guide shaft; the support plate is fixedly connected to the input end slider and the input end sliding seat by screws; the two cam slot plates are fixed to the upper and lower sides of the support plate by screws, and the two input end racks are fixed to the left and right sides of the support plate by screws; the crank is fixedly mounted on the input shaft by bolts through the crank pressure block; one end of the input end cam follower is hinged to the end of the crank, and the other end of the input end cam follower is placed in the groove of the cam slot plate to form a cam pair; the incomplete gear is fixedly mounted on the input shaft, and the incomplete gear is meshed with the input end rack to form a gear rack pair;

[0006] The speed regulating mechanism comprises a mounting plate, a servo motor, a rotating shaft and a speed regulating plate; the mounting plate is fixedly mounted on the support plate by bolts; the servo motor is fixedly mounted on the mounting plate by screws; the rotating shaft is mounted in the circular hole of the mounting plate to form a rotating pair, one end of the rotating shaft is connected to the motor shaft of the servo motor; the speed regulating plate is mounted on the other end of the rotating shaft by screws;

[0007] The output mechanism includes an output shaft, an output end guide rail, an output end support, an output end slider, an output end guide shaft, an output end sliding seat, a sliding bracket, a follower rod, an output end cam follower, a rack 1, a rack 2, a gear 1, a gear 2, a ratchet, a pawl 1 and a pawl 2; the two ends of the output shaft are respectively installed in two bearings to form a rotating pair; the output end guide rail and the output end support are respectively fixed on both sides of the upper end surface of the box seat; the output end slider is sleeved on the output end guide rail to form a moving pair; the two ends of the output end guide shaft are respectively installed in the two output end supports, and the output end sliding seat is sleeved on the output end guide shaft to form a moving pair; the sliding bracket is made of plate The structural parts are connected by bolts and screws, and the sliding bracket is fixedly connected with the output end slider and the output end sliding seat by screws respectively; the follower rod is installed on the upper end of the sliding bracket by screws; one end of the output end cam follower is hinged with the end of the follower rod, and the other end of the output end cam follower is placed in the groove of the speed regulating plate to form a cam pair; the rack 1 is installed on the upper end of the sliding bracket, and the rack 2 is installed on the lower end of the sliding bracket; the gear 1 and the gear 2 are respectively loosely sleeved on the output shaft, the gear 1 is meshed with the rack 1, and the gear 2 is meshed with the rack 2 to form a gear rack pair; the ratchet is fixed on the output shaft, and the pawl 1 and the pawl 2 are respectively fixed on the inner end faces of the gear 1 and the gear 2;

[0008] Compared with the prior art, the technical effect of the present invention is as follows: the present invention takes the cam-connecting rod-gear mechanism as the core, utilizes the cam mechanism's sinusoidal acceleration motion law characteristics, realizes the reciprocating translation motion of the sliding bracket, and combines the speed change of the speed regulating mechanism with the unidirectional motion conversion of the ratchet mechanism to realize the speed change output. It has the characteristics of simple structure, compact device, high efficiency, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is the general assembly axonometric drawing of the present invention

[0010] Figure 2 This is the box structure diagram of the present invention

[0011] Figure 3 This is the back structure diagram of the input mechanism of the present invention

[0012] Figure 4 This is the front structural diagram of the input mechanism of the present invention

[0013] Figure 5 This is the structural diagram of the speed regulating mechanism of the present invention

[0014] Figure 6 This is the output mechanism structure diagram of the present invention

[0015] Figure 7 This is the structural diagram of the sliding bracket of the present invention DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0017] As shown in the accompanying drawings: the present invention comprises a housing 1, an input mechanism 2, a speed regulating mechanism 3 and an output mechanism 4; the housing 1 is fixed by bolts; the input mechanism 2 is installed on the inner side of the housing 1 by bolts and screws; the speed regulating mechanism 3 is fixedly connected to the input mechanism 2 by bolts; the output mechanism 4 is installed on the inner side of the housing 1 by bolts and screws;

[0018] The box body 1 includes a box seat 101, a box cover 102, a bearing 103 and an end cover 104; the box seat 101 and the box cover 102 are fixedly connected by bolts, the four bearings 103 are respectively installed in the bearing holes on the side of the box seat 101, and the end cover 104 is installed on the outside of the box seat 101 by bolts;

[0019] The input mechanism 2 includes an input shaft 201, an input end guide rail 202, an input end support 203, an input end slider 204, an input end guide shaft 205, an input end sliding seat 206, a support plate 207, a cam groove plate 208, an input end rack 209, a crank 210, a crank pressure block 211, an input end cam follower 212 and an incomplete gear 213; the two ends of the input shaft 201 are respectively installed in two bearings 103 to form a rotating pair; the input end guide rail 202 is fixedly installed on the inner side of the box seat 101; the two input end supports 203 are respectively fixedly installed on the inner side of the box seat 101; the input end slider 204 is sleeved on the input end guide rail 202 to form a moving pair; the two ends of the input end guide shaft 205 are respectively installed in the two input end supports 203, and the input The end sliding seat 206 is sleeved on the input end guide shaft 205 to form a moving pair; the support plate 207 is fixedly connected to the input end slider 204 and the input end sliding seat 206 by screws; the two cam slot plates 208 are fixed to the upper and lower sides of the support plate 207 by screws, and the two input end racks 209 are fixed to the left and right sides of the support plate 207 by screws; the crank 210 is fixedly mounted on the input shaft 201 by bolts through the crank pressure block 211; one end of the input end cam follower 212 is hinged to the end of the crank 210, and the other end of the input end cam follower 212 is placed in the groove of the cam slot plate 208 to form a cam pair; the incomplete gear 213 is fixedly mounted on the input shaft 201, and the incomplete gear 213 is meshed with the input end rack 209 to form a gear rack pair;

[0020] The speed regulating mechanism 3 includes a mounting plate 301, a servo motor 302, a rotating shaft 303 and a speed regulating plate 304; the mounting plate 301 is fixed on the support plate 207 by bolts; the servo motor 302 is fixed on the mounting plate 301 by screws; the rotating shaft 303 is installed in the circular hole of the mounting plate 301 to form a rotating pair, and one end of the rotating shaft 303 is connected to the motor shaft of the servo motor 302; the speed regulating plate 304 is installed on the other end of the rotating shaft 303 by screws;

[0021] The output mechanism 4 includes an output shaft 401, an output end guide rail 402, an output end support 403, an output end slider 404, an output end guide shaft 405, an output end sliding seat 406, a sliding bracket 407, a follower rod 408, an output end cam follower 409, a rack 1 410, a rack 2 411, a gear 1 412, a gear 2 413, a ratchet 414, a pawl 1 415 and a pawl 2 416; the output shaft 401 is respectively provided at both ends with Installed in two bearings 103 to form a rotating pair; the output end guide rail 402 and the output end support 403 are respectively fixed on both sides of the upper end surface of the box seat 101; the output end slider 404 is sleeved on the output end guide rail 402 to form a moving pair; the two ends of the output end guide shaft 405 are respectively installed in the two output end supports 403, and the output end sliding seat 406 is sleeved on the output end guide shaft 405 to form a moving pair; the sliding bracket 407 is a structural member composed of a plate connected by bolts and screws, and the sliding bracket 407 is respectively fixed to the output end slider 404 and the output end sliding seat 406 by screws; the follower rod 408 is installed on the upper end of the sliding bracket 407 by screws; one end of the output end cam follower 409 is hinged to the end of the follower rod 408, and the other end of the output end cam follower 409 is placed in the groove of the speed regulating plate 304 to form a cam pair; the rack 410 is installed on the sliding The movable bracket 407 is at the upper end, and the rack 2 411 is installed at the lower end of the sliding bracket 407; the gear 1 412 and the gear 2 413 are respectively sleeved on the output shaft 401, the gear 1 412 is meshed with the rack 1 410, and the gear 2 413 is meshed with the rack 2 411, respectively forming a gear rack pair; the ratchet 414 is fixedly mounted on the output shaft 401, and the ratchet 1 415 and the ratchet 2 416 are respectively fixedly mounted on the inner end surfaces of the gear 1 412 and the gear 2 413;

[0022] The working principle of the present invention is as follows: when the device is in the initial position, that is, in the non-working state, the input mechanism 2 and the speed regulating mechanism 3 are at the top of the stroke, the output mechanism 4 is at the rightmost end of the stroke, the input end cam follower 212 is located in the middle position of the groove of the lower cam groove plate 208, and the output end cam follower 409 is located at the lower right end of the speed regulating plate 304; when the device starts to work, the input shaft 201 rotates counterclockwise, driving the crank 210 and the incomplete gear 213 to rotate counterclockwise, and the input end cam follower 212 drives the input mechanism 2 and the speed regulating mechanism 3 to move downward; when the input end cam follower 2 When the incomplete gear 213 is disengaged from the cam groove of the lower cam groove plate 208, the incomplete gear 213 is meshed with the left input end rack 209, and the incomplete gear 213 drives the input mechanism 2 and the speed regulating mechanism 3 to continue to move downward; when the incomplete gear 213 is disengaged from the left input end rack 209, the input end cam follower 212 enters the cam groove of the upper cam groove plate 208, and the input end cam follower 212 drives the input mechanism 2 and the speed regulating mechanism 3 to continue to move downward until the input end cam follower 212 reaches the middle position of the groove of the upper cam groove plate 208. At this time, the input mechanism 2 and the speed regulating mechanism 3 reach the bottom of the stroke; when the speed regulating mechanism 3 moves downward, it drives the output end cam follower 409 to make the output mechanism 4 move leftward; the rack 1 410 moves leftward to drive the gear 1 412 to rotate counterclockwise, and the pawl 1 415 pushes the ratchet 414 to rotate counterclockwise, thereby driving the output shaft 401 to rotate counterclockwise. At this time, the rack 2 411 moves leftward to drive the gear 2 413 to rotate clockwise, and the pawl 2 416 slides on the ratchet 414; then the input shaft 201 continues to rotate counterclockwise, and similarly, the input end cam follower 212 Move from the middle position of the slot of the upper cam slot plate 208 to the middle position of the slot of the lower cam slot plate 208, the input mechanism 2 and the speed regulating mechanism 3 move upward, driving the output mechanism 4 to move rightward, the rack 2 411 moves rightward to drive the gear 2 413 to rotate counterclockwise, the pawl 2 416 pushes the ratchet 414 to rotate counterclockwise, thereby driving the output shaft 401 to rotate counterclockwise, at this time, the rack 1 410 moves rightward to drive the gear 1 412 to rotate clockwise, and the pawl 1 415 slides on the ratchet 414; at this point, the device completes an input and output cycle and returns to the initial position;

[0023] The speed changing principle of the present invention is: when the servo motor 302 controls the speed regulating plate 304 to be in a vertical state, the up and down movement of the input mechanism 2 and the speed regulating mechanism 3 will not drive the output mechanism 4 to move. At this time, the device is in neutral gear and the output shaft 401 will not output power; when the servo motor 302 controls the speed regulating plate 304 to be in an inclined state and the angle with the vertical direction is 45°, the up and down movement of the input mechanism 2 and the speed regulating mechanism 3 will drive the output mechanism 4 to move left and right. At this time, the device is in high gear and the output shaft 401 rotates the fastest; when the servo motor 302 controls the speed regulating plate 304 to adjust within the angle range of 0° to 45° with the vertical direction, the speed of the left and right movement of the output mechanism 4 will change accordingly, thereby changing the output speed of the output shaft 401, thereby realizing stepless speed change.

Claims

1. A non-frictional, pulsation-free continuously variable transmission, characterized in that: It includes a box body, an input mechanism, a speed regulating mechanism and an output mechanism; the box body includes a box seat, a box cover, a bearing and an end cover; the box seat and the box cover are fixedly connected by bolts, and the bearing and the end cover are respectively installed in the bearing hole on the side of the box seat and the outside of the box seat; the input mechanism is installed at the front end of the box body, and the input mechanism includes an input shaft, an input end guide rail, an input end support, an input end slider, an input end guide shaft, an input end sliding seat, a support plate, a cam groove plate, an input end rack, a crank, a crank pressure block, an input end cam follower and an incomplete gear; the two ends of the input shaft are respectively installed in bearings; the input end guide rail and the input end support are respectively fixed on the inner side of the box seat; the output The input end slider is sleeved on the input end guide rail to form a moving pair, the input end guide shaft is installed in the input end support, and the input end sliding seat is sleeved on the input end guide shaft to form a moving pair; the support plate is respectively fixedly connected to the input end slider and the input end sliding seat, the cam slot plate is fixed on the upper and lower sides of the support plate, and the input end rack is fixed on the left and right sides of the support plate; the crank is fixedly mounted on the input shaft through the crank pressure block; one end of the input end cam follower is hinged to the end of the crank, and the other end of the input end cam follower is placed in the slot of the cam slot plate to form a cam pair; the incomplete gear is fixedly mounted on the input shaft, and the incomplete gear is meshed with the input end rack to form a gear rack pair.

2. A non-frictional, pulsation-free continuously variable transmission according to claim 1, characterized in that :The speed regulating mechanism includes a mounting plate, a servo motor, a rotating shaft and a speed regulating plate; the mounting plate is fixed on the support plate by bolts; the servo motor is fixed on the mounting plate by screws; the rotating shaft is installed in the circular hole of the mounting plate to form a rotating pair, one end of the rotating shaft is connected to the motor shaft of the servo motor; the speed regulating plate is installed on the other end of the rotating shaft by screws.

3. A non-frictional pulsation-free continuously variable transmission according to claim 1, characterized in that The output mechanism includes an output shaft, an output end guide rail, an output end support, an output end slider, an output end guide shaft, an output end sliding seat, a sliding bracket, a follower rod, an output end cam follower, a rack 1, a rack 2, a gear 1, a gear 2, a ratchet, a pawl 1 and a pawl 2; the two ends of the output shaft are respectively installed in bearings; the output end guide rail and the output end support are respectively fixed on both sides of the upper end surface of the box seat; the output end slider is sleeved on the output end guide rail to form a moving pair, the output end guide shaft is installed in the output end support, and the output end sliding seat is sleeved on the output end guide shaft to form a moving pair; the sliding bracket is connected by bolts and screws using a plate The sliding bracket is fixedly connected with the output end sliding seat and the output end slider by screws respectively; the follower rod is installed on the upper end of the sliding bracket by screws; one end of the output end cam follower is hinged with the end of the follower rod, and the other end of the output end cam follower is placed in the groove of the speed regulating plate to form a cam pair; the rack 1 is installed on the upper end of the sliding bracket, and the rack 2 is installed on the lower end of the sliding bracket; the gear 1 and the gear 2 are respectively loosely sleeved on the output shaft, the gear 1 is meshed with the rack 1, and the gear 2 is meshed with the rack 2 to form a gear rack pair respectively; the ratchet is fixed on the output shaft, and the pawl 1 and the pawl 2 are respectively fixed on the inner end faces of the gear 1 and the gear 2.

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