CN219932874U

CN219932874U - Stepless speed change transmission structure convenient for belt disassembly and assembly

Info

Publication number: CN219932874U
Application number: CN202321500013.6U
Authority: CN
Inventors: 高晖; 张伟; 康传贝; 程照轩; 李东
Original assignee: Weichai Lovol Intelligent Agricultural Technology Co Ltd
Current assignee: Weichai Lovol Intelligent Agricultural Technology Co Ltd
Priority date: 2023-06-13
Filing date: 2023-06-13
Publication date: 2023-10-31
Anticipated expiration: 2033-06-13

Abstract

The utility model relates to a stepless speed change transmission structure convenient for belt disassembly and assembly, which comprises a bottom support plate, wherein the upper surface of the bottom support plate is provided with a belt wheel mounting bottom plate which is locked and mounted on the bottom support plate through a reaming hole bolt; the belt wheel mounting bottom plate is provided with a left bearing mounting seat and a right bearing mounting seat at intervals, the right bearing mounting seat is fixedly connected with the belt wheel mounting bottom plate, and the screw end of the hinging hole bolt sequentially penetrates through the left bearing mounting seat, the belt wheel mounting bottom plate and the nut in a threaded manner; the left bearing installation seat and the right bearing installation seat are respectively connected with two ends of the rotating shaft through spherical bearings in a rotating mode. According to the utility model, through the reasonable arrangement structure, the belt is conveniently and rapidly assembled and disassembled according to the characteristic that the ball bearing can be aligned while the power is effectively transmitted from the engine output to the tail end parts.

Description

Stepless speed change transmission structure convenient for belt disassembly and assembly

Technical Field

The utility model relates to the technical field of stepless speed change of agricultural equipment, in particular to a stepless speed change transmission structure convenient for belt disassembly and assembly.

Background

At present, the continuously variable transmission wheel structure on agricultural equipment is more in application, the continuously variable transmission wheel generally transmits and converts power through the belt wheel at the other side, and the convenience of dismounting the belt is more and more important. In the prior art, the belt pulley is usually installed through the bearing seats on two sides, specifically, two bearing installation seats are arranged on the base at intervals, the two bearing installation seats are fixedly connected with the base in a welding mode, the bearings are fixedly connected with the bearing installation seats through bolts, the rotating shafts on two sides of the belt pulley are respectively rotated and arranged on the bearings, when the belt is required to be disassembled, the bolts on the two bearings are required to be disassembled, the bearing is taken down from the bearing installation seats, then the belt pulley is taken down, the belt is installed on the belt pulley, the operation is troublesome, time and labor are wasted, fastening bolt abrasion can be caused, and the reliability of a transmission system is reduced.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a stepless speed change transmission structure convenient for disassembling and assembling a belt, and effectively solves the problem of difficult disassembly and assembly of the belt.

The technical scheme for solving the technical problems is as follows: the stepless speed change transmission structure comprises a bottom support plate, wherein a belt wheel mounting bottom plate is arranged on the upper surface of the bottom support plate, and is locked and mounted on the bottom support plate through a reaming hole bolt; the belt wheel mounting bottom plate is provided with a left bearing mounting seat and a right bearing mounting seat at intervals, the right bearing mounting seat is fixedly connected with the belt wheel mounting bottom plate, and the screw end of the reaming hole bolt sequentially penetrates through the left bearing mounting seat, the belt wheel mounting bottom plate and the nut in a threaded manner; the left bearing installation seat and the right bearing installation seat are respectively connected with two ends of a rotating shaft through spherical bearings in a rotating way, an input belt pulley is fixedly sleeved on the rotating shaft, one end of the rotating shaft penetrates through the right bearing installation seat and then is fixedly sleeved with an input stepless speed change wheel, the input belt pulley is in transmission connection with an output belt pulley of the engine through an input belt, and the input stepless speed change wheel is in transmission connection with the output stepless speed change wheel through a speed change V belt; the input belt is connected with a belt tensioning mechanism for adjusting the tension of the input belt.

The beneficial effects of the utility model are as follows: according to the utility model, through the reasonable arrangement structure, the convenience of disassembly and assembly of the belt is fully considered while the power is effectively transmitted from the output of the engine to the tail end parts, the assembly precision is ensured by utilizing the split type support and the hinged hole bolt structure, and meanwhile, the belt is disassembled and assembled conveniently according to the characteristic of aligning the ball bearing.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the first end of bottom extension board is articulated through pivot and link, the second end of bottom extension board is equipped with and is used for with the climbing mechanism of the second end jacking of bottom extension board.

The beneficial effects of adopting the further scheme are as follows: through setting up pivot and climbing mechanism, realize that the one end of bottom extension board can be by the jacking, when the inconvenient maintenance of mounted position of bottom extension board, jack-up through climbing mechanism, fix out bottom extension board and the structure of installing above that, convenient maintenance, simultaneously, engine output band pulley sets up in the one side that the bottom extension board was equipped with the pivot, is close to engine output band pulley by the input belt pulley after the jack-up, and input belt pulley sends, the installation and the change of the input belt pulley of being convenient for.

Further, climbing mechanism includes jacking fixing base and upper and lower regulation push rod, the one end of upper and lower regulation push rod with the jacking fixing base is articulated, the other end of upper and lower regulation push rod with the second end of bottom extension board is connected.

The beneficial effects of adopting the further scheme are as follows: simple structure, low cost and convenient installation.

Further, the up-down adjusting push rod comprises a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod, the adjusting cylinder is in threaded connection with the threaded adjusting rod or is fixedly connected with a nut in threaded connection with the threaded adjusting rod, one end of the threaded adjusting rod is hinged with the jacking fixing seat, and the adjusting cylinder is connected with the second end of the bottom support plate.

The beneficial effects of adopting the further scheme are as follows: through rotating the adjusting cylinder, the production of the up-down adjusting push rod is shortened, so that the bottom support plate is lifted or put down, and the operation is convenient.

Further, the up-down adjusting push rod is an air cylinder or a hydraulic cylinder or a linear motor.

The beneficial effects of adopting the further scheme are as follows: the up-down adjusting push rod adopts an air cylinder or a hydraulic cylinder or a linear motor, and the bottom support plate can be lifted up or put down through the controller.

Further, the upper surface of the first end of the bottom support plate is provided with a front-back pushing mechanism for driving the belt wheel mounting bottom plate to move along the direction from the first end to the second end of the bottom support plate.

The beneficial effects of adopting the further scheme are as follows: the installation position of the belt wheel installation bottom plate can be adjusted by the arrangement of the front pushing mechanism and the rear pushing mechanism, the belt wheel installation bottom plate is conveniently arranged at the installation position inconvenient to operate, and limited space is fully utilized.

Further, a plurality of strip-shaped holes extending from the first end to the second end of the bottom support plate in the length direction are formed in the bottom support plate, and the belt wheel mounting bottom plate is locked and mounted in the strip-shaped holes through the hinging hole bolts; the front-back pushing mechanism comprises a pushing fixing seat and a front-back adjusting push rod, wherein the pushing fixing seat is fixed on the upper surface of the bottom support plate, the front-back adjusting push rod is arranged along the length direction of the strip-shaped hole, the front-back adjusting push rod is connected with the pushing fixing seat, and one end of the front-back adjusting push rod is connected with the first end of the belt wheel mounting bottom plate.

The beneficial effects of adopting the further scheme are as follows: through adjusting the front and back adjusting push rod for band pulley mounting plate removes along the length direction in bar hole, thereby realizes band pulley mounting plate mounted position's regulation.

Further, the front-back adjusting push rod is a threaded rod, one end of the front-back adjusting push rod passes through the pushing fixed seat and then abuts against the first end part of the belt wheel mounting bottom plate, and the front-back adjusting push rod is in threaded connection with the pushing fixed seat.

The beneficial effects of adopting the further scheme are as follows: the threaded rod is rotated, so that the threaded rod pushes the belt wheel mounting bottom plate to move along the length direction of the strip-shaped hole, and the operation is convenient.

Further, the front-back adjusting push rod is an air cylinder, a hydraulic cylinder or a linear motor, the front-back adjusting push rod is fixedly connected with the pushing fixing seat, and the output end of the front-back adjusting push rod is connected with the first end of the belt wheel mounting bottom plate.

The beneficial effects of adopting the further scheme are as follows: the front and back adjusting push rod adopts an air cylinder or a hydraulic cylinder or a linear motor, and the front and back position can be adjusted by the control of a controller.

Further, belt tensioning mechanism includes tensioning seat, take-up pulley, first rotating arm and second rotating arm, it is equipped with the fixed axle to rotate on the tensioning seat, the cover is equipped with the rotary drum on the fixed axle, the one end of first rotating arm with the outer wall fixed connection of rotary drum, the other end of first rotating arm with take-up pulley fixed connection, take-up pulley butt input belt butt, the outer wall fixed connection of the one end rotary drum of second rotating arm, first rotating arm with the second rotating arm is the contained angle setting, the one end of the articulated transfer line of the other end of second rotating arm, the slip cap is equipped with connecting seat and compression spring on the transfer line, compression spring's one end with the connecting seat is connected, compression spring's the other end with transfer line fixed connection.

The beneficial effects of adopting the further scheme are as follows: the connecting seat is arranged at the installation position of the agricultural machine, and the transmission rod is driven under the action of the compression spring, so that the rotary drum is driven to rotate, the tensioning wheel is abutted against the input belt, and the tensioning of the input belt is realized.

Drawings

FIG. 1 is a schematic view of the connection of the bottom bracket of the present utility model and the components mounted thereon;

FIG. 2 is a schematic diagram of the structure of the present utility model, in which the bottom support plate is lifted by the lifting mechanism;

in the drawings, the list of components represented by the various numbers is as follows:

1. a bottom support plate; 2. a belt wheel mounting bottom plate; 3. reaming a hole bolt; 4. a left bearing mount; 5. a right bearing mount; 6. a spherical bearing; 7. a rotating shaft; 8. an input pulley; 9. inputting a stepless speed change wheel; 10. an input belt; 11. an engine output pulley; 12. a variable speed V-belt; 13. outputting a continuously variable transmission wheel; 14. a rotating shaft; 15. a connecting frame; 16. jacking the fixing seat; 17. the push rod is adjusted up and down; 18. a bar-shaped hole; 19. pushing the fixing seat; 20. the push rod is adjusted forwards and backwards; 21. a tensioning seat; 22. a tensioning wheel; 23. a first rotating arm; 24. a second rotating arm; 25. a fixed shaft; 26. a rotating drum; 27. a transmission rod; 28. a connecting seat; 29. compressing the spring.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

As shown in fig. 1 and 2, the embodiment of the utility model comprises a bottom support plate 1, wherein a belt wheel mounting bottom plate 2 is arranged on the upper surface of the bottom support plate 1, and the belt wheel mounting bottom plate 2 is locked and mounted on the bottom support plate 1 through a reaming hole bolt 3; the pulley mounting base plate 2 is provided with a left bearing mounting seat 4 and a right bearing mounting seat 5 at intervals, U-shaped grooves are formed in the tops of the left bearing mounting seat 4 and the right bearing mounting seat 5, the right bearing mounting seat 5 is fixedly connected with the pulley mounting base plate 2 in a welding mode, and the screw end of the reaming hole bolt 3 sequentially penetrates through the left bearing mounting seat 4 and the pulley mounting base plate 2 to be connected with a nut in a threaded mode; the left bearing mounting seat 4 and the right bearing mounting seat 5 are respectively and rotatably connected with two ends of the rotating shaft 7 through spherical bearings 6, and specifically, the device further comprises a connecting plate, a mounting cylinder is fixedly arranged in the middle of the connecting plate, the spherical bearings 6 are fixedly arranged in the mounting cylinder, the connecting plate is fixedly connected with the outer side wall of the left bearing mounting seat 4 or the right bearing mounting seat 5 through bolts during mounting, the mounting cylinder is arranged in the U-shaped groove, an input belt pulley 8 is fixedly sleeved on the rotating shaft 7, an input continuously variable transmission wheel 9 is fixedly sleeved on one end of the rotating shaft 7 after passing through the right bearing mounting seat 5, the input belt pulley 8 is in transmission connection with an engine output belt pulley 11 through an input belt 10, the input continuously variable transmission wheel 9 is in transmission connection with an output continuously variable transmission wheel 13 through a variable transmission V belt 12, the output continuously variable transmission wheel 13 can be externally connected with other parts such as a gearbox, a roller and the like, and finally, the transmission of power from the engine to all tail end parts is realized; the input belt 10 is connected with a belt tensioning mechanism for adjusting the tension of the input belt 10.

In the embodiment of the present utility model, the first end of the bottom support plate 1 is hinged to the connecting frame 15 through the rotating shaft 14, the second end of the bottom support plate 1 is provided with a jacking mechanism for jacking the second end of the bottom support plate 1, in this embodiment, the first end and the second end of the bottom support plate 1 refer to opposite ends of the bottom support plate 1, the engine output pulley 11 is disposed on one side of the first end of the bottom support plate 1, a connection line between the first end and the second end of the bottom support plate 1 is perpendicular to the rotating shaft 7, and the rotating shaft 7 is parallel to the rotating shaft 14. Specifically, the jacking mechanism comprises a jacking fixed seat 16 and an up-down adjusting push rod 17, the jacking fixed seat 16 is fixedly connected with an external frame, one end of the up-down adjusting push rod 17 is hinged with the jacking fixed seat 16, and the other end of the up-down adjusting push rod 17 is connected with the second end of the bottom support plate 1. Through setting up pivot 14 and climbing mechanism, realize that the one end of bottom extension board 1 can be by the jacking, when the inconvenient maintenance of mounted position of bottom extension board 1, jack-up through climbing mechanism, fix out bottom extension board 1 and its structure of installing above that, the maintenance of being convenient for, simultaneously, engine output band pulley 11 sets up in the one side that bottom extension board 1 was equipped with pivot 14, is close to engine output band pulley 11 by jack-up back input band pulley 8, and input band pulley 8 sends, the installation and the change of the input band pulley 8 of being convenient for.

In one embodiment of the present utility model, the up-down adjusting push rod 17 includes a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod, the adjusting cylinder is in threaded connection with the threaded adjusting rod or the adjusting cylinder is fixedly connected with a nut in threaded connection with the threaded adjusting rod, one end of the threaded adjusting rod is hinged with the jacking fixing seat 16, the adjusting cylinder is connected with the second end of the bottom support plate 1, and in particular, the adjusting cylinder may be abutted with the second end of the bottom support plate 1 or rotationally connected through a ball shaft. The production or shortening of the up-and-down adjusting push rod 17 is realized by rotating the adjusting cylinder, so that the bottom support plate 1 is lifted or put down, and the operation is convenient.

In other embodiments of the present utility model, the up-down adjusting push rod 17 is an air cylinder or a hydraulic cylinder or a linear motor, and the up-down adjusting push rod 17 adopts the air cylinder or the hydraulic cylinder or the linear motor, so that the bottom support plate 1 can be lifted up or down through the controller.

In the embodiment of the present utility model, a front-back pushing mechanism for driving the pulley mounting base plate 2 to move along the direction from the first end to the second end of the bottom support plate 1 is provided on the upper surface of the first end of the bottom support plate 1. Specifically, the bottom support plate 1 is provided with a plurality of strip-shaped holes 18 extending from the first end to the second end of the bottom support plate 1 in the length direction, and the belt wheel mounting bottom plate 2 is locked and mounted in the strip-shaped holes 18 through the reaming hole bolts 3; the front-back pushing mechanism comprises a pushing fixed seat 19 fixed on the upper surface of the bottom support plate 1 and a front-back adjusting push rod 20, the front-back adjusting push rod 20 is arranged along the length direction of the strip-shaped hole 18, the front-back adjusting push rod 20 is connected with the pushing fixed seat 19, and one end of the front-back adjusting push rod 20 is connected with the first end of the belt wheel mounting bottom plate 2. The setting of pushing mechanism from beginning to end can adjust band pulley mounting plate 2's mounted position, conveniently sets up band pulley mounting plate 2 in inconvenient operation's mounted position, make full use of limited space for band pulley mounting plate 2 removes along the length direction of bar hole 18 through adjusting fore-and-aft adjustment push rod 20, thereby realizes band pulley mounting plate 2 mounted position's regulation.

In one embodiment of the present utility model, the front-rear adjustment push rod 20 is a threaded rod, one end of the front-rear adjustment push rod 20 passes through the push fixing seat 19 and then abuts against the first end of the pulley mounting base plate 2, and the front-rear adjustment push rod 20 is in threaded connection with the push fixing seat 19. The threaded rod is rotated, so that the threaded rod pushes the belt wheel mounting bottom plate 2 to move along the length direction of the strip-shaped hole 18, and the operation is convenient.

In other embodiments of the present utility model, the front-back adjusting push rod 20 is an air cylinder, a hydraulic cylinder or a linear motor, the front-back adjusting push rod 20 is fixedly connected with the pushing fixing seat 19, and an output end of the front-back adjusting push rod 20 is connected with the first end of the pulley mounting base plate 2. The front-back adjusting push rod 20 adopts an air cylinder or a hydraulic cylinder or a linear motor, and the front-back position can be adjusted through the control of a controller.

In the embodiment of the utility model, the belt tensioning mechanism comprises a tensioning seat 21, a tensioning wheel 22, a first rotating arm 23 and a second rotating arm 24, wherein a fixed shaft 25 is rotatably arranged on the tensioning seat 21, a rotary drum 26 is sleeved on the fixed shaft 25, one end of the first rotating arm 23 is fixedly connected with the outer wall of the rotary drum 26, the other end of the first rotating arm 23 is fixedly connected with the tensioning wheel 22, the tensioning wheel 22 abuts against the input belt 10, one end of the second rotating arm 24 is fixedly connected with the outer wall of the rotary drum 26, the first rotating arm 23 and the second rotating arm 24 are arranged in an included angle manner, the other end of the second rotating arm 24 is hinged with one end of a transmission rod 27, a connecting seat 28 and a compression spring 29 are sleeved on the transmission rod 27 in a sliding manner, one end of the compression spring 29 is connected with the connecting seat 28, and the other end of the compression spring 29 is fixedly connected with the transmission rod 27. The connecting seat 28 is arranged at the installation position of the agricultural machine, and drives the transmission rod 27 under the action of the compression spring 29 so as to drive the rotary drum 26 to rotate, thereby enabling the tensioning wheel 22 to abut against the input belt 10 and tensioning the input belt 10.

In the utility model, the left bearing mounting seat 4 and the belt wheel mounting plate are combined, when the belt needs to be replaced, the hinging hole bolt 3 connected with the left bearing mounting seat 4 is dismounted, the hinging hole bolt 3 connected with the right bearing mounting seat 5 is loosened, the left bearing mounting seat 4 can be lifted by an angle of about 5 degrees due to a certain adjusting range of the spherical bearing 6, and the input belt 10 can be mounted on the input belt wheel 8 through a lifted gap, so that the dismounting of the bearing and the fastening bolt is avoided, the efficiency is improved, and the stability of a transmission system is ensured. The utility model effectively realizes the transmission of power from the output of the engine to the tail end parts, fully considers the convenience of the disassembly and assembly of the belt, ensures the assembly precision by utilizing the split type support and the structure of the hinged hole bolt 3, and realizes the convenience of the disassembly and assembly of the belt by reasonably arranging the structure according to the characteristic of aligning the ball bearing.

In the description of the present utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims

1. The stepless speed change transmission structure is characterized by comprising a bottom support plate (1), wherein a belt wheel mounting bottom plate (2) is arranged on the upper surface of the bottom support plate (1), and the belt wheel mounting bottom plate (2) is locked and mounted on the bottom support plate (1) through a hinging hole bolt (3); the belt wheel mounting base plate (2) is provided with a left bearing mounting seat (4) and a right bearing mounting seat (5) at intervals, the right bearing mounting seat (5) is fixedly connected with the belt wheel mounting base plate (2), and the screw end of the hinging hole bolt (3) sequentially penetrates through the left bearing mounting seat (4) and the belt wheel mounting base plate (2) to be in threaded connection with a nut; the left bearing mounting seat (4) and the right bearing mounting seat (5) are respectively connected with two ends of the rotating shaft (7) in a rotating way through spherical bearings (6), an input belt pulley (8) is fixedly sleeved on the rotating shaft (7), one end of the rotating shaft (7) penetrates through the right bearing mounting seat (5) and then is fixedly sleeved with an input continuously variable transmission wheel (9), the input belt pulley (8) is in transmission connection with an engine output belt pulley (11) through an input belt (10), and the input continuously variable transmission wheel (9) is in transmission connection with an output continuously variable transmission wheel (13) through a variable V belt (12); the input belt (10) is connected with a belt tensioning mechanism for adjusting the tension of the input belt (10).

2. The stepless speed change transmission structure convenient for belt disassembly and assembly according to claim 1, wherein a first end of the bottom support plate (1) is hinged with the connecting frame (15) through a rotating shaft (14), and a second end of the bottom support plate (1) is provided with a jacking mechanism for jacking the second end of the bottom support plate (1).

3. The stepless speed change transmission structure convenient for belt disassembly and assembly according to claim 2, wherein the jacking mechanism comprises a jacking fixed seat (16) and an up-down adjusting push rod (17), one end of the up-down adjusting push rod (17) is hinged with the jacking fixed seat (16), and the other end of the up-down adjusting push rod (17) is connected with the second end of the bottom support plate (1).

4. The stepless speed change transmission structure convenient for belt disassembly and assembly according to claim 3, wherein the up-down adjusting push rod (17) comprises a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod, the adjusting cylinder is in threaded connection with the threaded adjusting rod or fixedly connected with a nut in threaded connection with the threaded adjusting rod, one end of the threaded adjusting rod is hinged with the jacking fixed seat (16), and the adjusting cylinder is connected with the second end of the bottom support plate (1).

5. A stepless speed change transmission structure for facilitating belt disassembly and assembly according to claim 3, wherein the up-down adjusting push rod (17) is an air cylinder or a hydraulic cylinder or a linear motor.

6. The stepless speed change transmission structure for facilitating belt disassembly and assembly according to claim 1, wherein a front-back pushing mechanism for driving the belt wheel mounting bottom plate (2) to move along the direction from the first end to the second end of the bottom support plate (1) is arranged on the upper surface of the first end of the bottom support plate (1).

7. The stepless speed change transmission structure for facilitating belt disassembly and assembly according to claim 6, wherein a plurality of strip-shaped holes (18) extending from the first end to the second end of the bottom support plate (1) in the length direction are formed in the bottom support plate (1), and the belt wheel mounting bottom plate (2) is locked and mounted in the strip-shaped holes (18) through the hinging hole bolts (3); the front-back pushing mechanism comprises a pushing fixed seat (19) fixed on the upper surface of the bottom support plate (1) and a front-back adjusting push rod (20), the front-back adjusting push rod (20) is arranged along the length direction of the strip-shaped hole (18), the front-back adjusting push rod (20) is connected with the pushing fixed seat (19), and one end of the front-back adjusting push rod (20) is connected with the first end of the belt wheel mounting bottom plate (2).

8. The stepless speed change transmission structure for facilitating belt disassembly and assembly according to claim 7, wherein the front and rear adjusting push rod (20) is a threaded rod, one end of the front and rear adjusting push rod (20) passes through the pushing fixing seat (19) and then abuts against the first end part of the belt wheel mounting bottom plate (2), and the front and rear adjusting push rod (20) is in threaded connection with the pushing fixing seat (19).

9. The stepless speed change transmission structure for facilitating belt disassembly and assembly according to claim 7, wherein the front and rear adjusting push rod (20) is an air cylinder or a liquid cylinder or a linear motor, the front and rear adjusting push rod (20) is fixedly connected with the pushing fixing seat (19), and an output end of the front and rear adjusting push rod (20) is connected with the first end of the belt wheel mounting base plate (2).

10. The stepless speed change transmission structure convenient for belt disassembly and assembly according to any one of claims 1 to 9, wherein the belt tensioning mechanism comprises a tensioning seat (21), a tensioning wheel (22), a first rotating arm (23) and a second rotating arm (24), a fixed shaft (25) is rotatably arranged on the tensioning seat (21), a rotary drum (26) is sleeved on the fixed shaft (25), one end of the first rotating arm (23) is fixedly connected with the outer wall of the rotary drum (26), the other end of the first rotating arm (23) is fixedly connected with the tensioning wheel (22), the tensioning wheel (22) is abutted to the input belt (10), the outer wall of one end of the second rotating arm (24) is fixedly connected with the outer wall of the rotary drum (26), the other end of the second rotating arm (24) is hinged with one end of a transmission rod (27), a connecting seat (28) and a compression spring (29) are slidably sleeved on the transmission rod (27), and the compression spring (29) is fixedly connected with one end of the compression spring (29).