A continuously variable transmission structure that facilitates belt disassembly and assembly

Abstract

This invention relates to a continuously variable transmission (CVT) structure that facilitates belt disassembly and assembly. It includes a bottom support plate, on the upper surface of which is a pulley mounting base plate. The pulley mounting base plate is secured to the bottom support plate using reamed bolts. A left-side bearing mounting seat and a right-side bearing mounting seat are spaced apart on the pulley mounting base plate. The right-side bearing mounting seat is fixedly connected to the pulley mounting base plate. The threaded end of the reamed bolt passes sequentially through the left-side bearing mounting seat and the pulley mounting base plate, and is threadedly connected to a nut. The left-side and right-side bearing mounting seats are rotatably connected to the two ends of a rotating shaft via spherical bearings. This invention, through a rational structural arrangement, effectively transmits power from the engine output to the end components. Taking advantage of the self-aligning characteristics of spherical bearings, the rational structural arrangement facilitates belt disassembly and assembly.

Description

Technical Field

[0001] This invention relates to the field of continuously variable transmission (CVT) technology for agricultural equipment, and more particularly to a CVT transmission structure that facilitates belt disassembly and assembly. Background Technology

[0002] Currently, continuously variable transmission (CVT) pulleys are widely used in agricultural equipment. CVTs typically transmit and convert power via a pulley on the other side, making the ease of belt installation and removal increasingly important. In existing technology, pulleys are usually mounted via bearing housings on both sides. Specifically, two bearing housings are spaced apart on a base and fixed to the base by welding. Bearings are bolted to the bearing housings, and the pulley's two shafts rotate on the bearings. When the belt needs to be installed or removed, the bolts on both bearings must be removed, the bearings removed from the bearing housings, the pulley removed, and the belt installed. This process is not only cumbersome and time-consuming, but it can also cause wear on the fastening bolts, reducing the reliability of the transmission system. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a continuously variable transmission structure that facilitates belt disassembly and assembly, effectively solving the problem of difficult belt disassembly and assembly.

[0004] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A continuously variable transmission structure that facilitates belt disassembly and assembly includes a bottom support plate. A pulley mounting base plate is provided on the upper surface of the bottom support plate. The pulley mounting base plate is locked onto the bottom support plate by a reamed hole bolt. A left bearing mounting seat and a right bearing mounting seat are provided at intervals on the pulley mounting base plate. The right bearing mounting seat is fixedly connected to the pulley mounting base plate. The screw end of the reamed hole bolt passes through the left bearing mounting seat and the pulley mounting base plate in sequence and is threadedly connected to a nut. The left bearing mounting seat and the right bearing mounting seat are respectively rotatably connected to the two ends of a rotating shaft by spherical bearings. An input pulley is fixedly sleeved on the rotating shaft. One end of the rotating shaft passes through the right bearing mounting seat and is fixedly sleeved with an input continuously variable transmission pulley. The input pulley is driven by an input belt and an engine output pulley. The input continuously variable transmission pulley is driven by a variable V-belt and an output continuously variable transmission pulley. The input belt is connected to a belt tensioning mechanism for adjusting the tension of the input belt.

[0005] The beneficial effects of this invention are: by rationally arranging the structure, this invention effectively realizes the transmission of power from the engine output to the end components, while fully considering the convenience of belt disassembly and assembly. It utilizes a split support with reamed hole bolt structure to ensure assembly accuracy, and rationally arranges the structure based on the self-aligning characteristics of ball bearings to achieve convenient belt disassembly and assembly.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the first end of the bottom support plate is hinged to the connecting frame via a pivot, and the second end of the bottom support plate is provided with a lifting mechanism for lifting the second end of the bottom support plate.

[0008] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up a rotating shaft and a lifting mechanism, one end of the bottom support plate can be lifted. When the installation position of the bottom support plate is inconvenient for maintenance, the bottom support plate and the structure installed on it can be lifted by the lifting mechanism to make maintenance easier. At the same time, the engine output pulley is set on the side of the bottom support plate where the rotating shaft is located. After being lifted, the input pulley is close to the engine output pulley, and the input pulley is sent, which facilitates the installation and replacement of the input pulley.

[0009] Furthermore, the lifting mechanism includes a lifting fixed base and an up-and-down adjusting push rod. One end of the up-and-down adjusting push rod is hinged to the lifting fixed base, and the other end of the up-and-down adjusting push rod is connected to the second end of the bottom support plate.

[0010] The advantages of adopting the above-mentioned further solutions are: simple structure, low cost, and easy installation.

[0011] Furthermore, the up-and-down adjusting push rod includes a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod. The adjusting cylinder is threadedly connected to the threaded adjusting rod or the adjusting cylinder is fixedly connected to a nut threadedly connected to the threaded adjusting rod. One end of the threaded adjusting rod is hinged to the lifting fixed seat, and the adjusting cylinder is connected to the second end of the bottom support plate.

[0012] The beneficial effect of adopting the above-mentioned further solution is that by rotating the adjusting cylinder, the upper and lower adjusting push rods can be extended or shortened, thereby raising or lowering the bottom support plate, which is convenient to operate.

[0013] Furthermore, the up-and-down adjusting push rod is a pneumatic cylinder, a hydraulic cylinder, or a linear motor.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the upper and lower adjustment push rod is made of a pneumatic cylinder, hydraulic cylinder or linear motor, and the bottom support plate can be lifted or lowered by the controller.

[0015] Furthermore, the upper surface of the first end of the bottom support plate is provided with a forward and backward pushing mechanism for driving the pulley mounting base plate to move along the direction from the first end to the second end of the bottom support plate.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the setting of the front and rear pushing mechanism can adjust the installation position of the pulley mounting base plate, making it convenient to set the pulley mounting base plate in an inconvenient installation position and making full use of the limited space.

[0017] Furthermore, the bottom support plate is provided with a plurality of strip-shaped holes extending from the first end to the second end of the bottom support plate in the length direction, and the pulley mounting base plate is locked and installed in the strip-shaped holes by the hinge hole bolts; the front and rear pushing mechanism includes a pushing fixed seat fixed on the upper surface of the bottom support plate and a front and rear adjusting push rod, the front and rear adjusting push rod is arranged along the length direction of the strip-shaped holes, the front and rear adjusting push rod is connected to the pushing fixed seat, and one end of the front and rear adjusting push rod is connected to the first end of the pulley mounting base plate.

[0018] The beneficial effect of adopting the above-mentioned further solution is that by adjusting the front and rear adjusting push rods, the pulley mounting base plate can be moved along the length direction of the strip hole, thereby realizing the adjustment of the mounting position of the pulley mounting base plate.

[0019] Furthermore, the front and rear adjustment push rod is a threaded rod, one end of which passes through the push fixing seat and abuts against the first end of the pulley mounting base plate, and the front and rear adjustment push rod is threadedly connected to the push fixing seat.

[0020] The beneficial effect of adopting the above-mentioned further solution is that rotating the threaded rod causes the threaded rod to push the pulley mounting base plate to move along the length of the strip hole, which is convenient to operate.

[0021] Furthermore, the front and rear adjustment push rod is a pneumatic cylinder, a hydraulic cylinder, or a linear motor. The front and rear adjustment push rod is fixedly connected to the push fixing seat, and the output end of the front and rear adjustment push rod is connected to the first end of the pulley mounting base plate.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the front and rear adjustment push rod is made of a cylinder, a hydraulic cylinder or a linear motor, and the front and rear positions can be adjusted by a controller.

[0023] Furthermore, the belt tensioning mechanism includes a tensioning seat, a tensioning wheel, a first rotating arm, and a second rotating arm. A fixed shaft is rotatably mounted on the tensioning seat, and a rotating cylinder is sleeved on the fixed shaft. One end of the first rotating arm is fixedly connected to the outer wall of the rotating cylinder, and the other end of the first rotating arm is fixedly connected to the tensioning wheel. The tensioning wheel abuts against the input belt. One end of the second rotating arm is fixedly connected to the outer wall of the rotating cylinder. The first rotating arm and the second rotating arm are arranged at an included angle. The other end of the second rotating arm is hinged to one end of a transmission rod. A connecting seat and a compression spring are slidably mounted on the transmission rod. One end of the compression spring is connected to the connecting seat, and the other end of the compression spring is fixedly connected to the transmission rod.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the connecting seat is installed at the installation position of the agricultural machinery, and under the action of the compression spring, it drives the transmission rod, thereby driving the rotating drum to rotate, so that the tensioning wheel abuts against the input belt, thereby achieving tensioning of the input belt. Attached Figure Description

[0025] Figure 1 This is a schematic diagram showing the connection of the bottom support plate and the components mounted thereon according to the present invention.

[0026] Figure 2 This is a schematic diagram of the structure of the present invention. In the figure, the bottom support plate is lifted by the lifting mechanism.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Bottom support plate; 2. Pulley mounting base plate; 3. Reamed hole bolt; 4. Left bearing mounting seat; 5. Right bearing mounting seat; 6. Spherical bearing; 7. Rotating shaft; 8. Input pulley; 9. Input continuously variable transmission pulley; 10. Input belt; 11. Engine output pulley; 12. V-belt; 13. Output continuously variable transmission pulley; 14. Rotating shaft; 15. Connecting bracket; 16. Lifting fixing seat; 17. Up and down adjusting push rod; 18. Strip hole; 19. Push fixing seat; 20. Front and rear adjusting push rod; 21. Tensioning seat; 22. Tensioning wheel; 23. First rotating arm; 24. Second rotating arm; 25. Fixed shaft; 26. Rotary drum; 27. Transmission rod; 28. Connecting seat; 29. ​​Compression spring. Detailed Implementation

[0029] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0030] like Figure 1 , Figure 2As shown, an embodiment of the present invention includes a bottom support plate 1, on the upper surface of which is provided a pulley mounting base plate 2. The pulley mounting base plate 2 is locked onto the bottom support plate 1 by a reamed bolt 3. A left bearing mounting seat 4 and a right bearing mounting seat 5 are provided on the pulley mounting base plate 2 at intervals. The top of both the left bearing mounting seat 4 and the right bearing mounting seat 5 are provided with U-shaped grooves. The right bearing mounting seat 5 is fixedly connected to the pulley mounting base plate 2 by welding. The screw end of the reamed bolt 3 passes through the left bearing mounting seat 4 and the pulley mounting base plate 2 in sequence and is threadedly connected to a nut. The left bearing mounting seat 4 and the right bearing mounting seat 5 are respectively rotatably connected to the two ends of a rotating shaft 7 by a spherical bearing 6. Specifically, it also includes a connecting plate, the middle of which is fixedly provided with The system includes a mounting cylinder, in which the spherical bearing 6 is fixedly mounted. During installation, the connecting plate is fixedly connected to the outer wall of the left bearing mounting seat 4 or the right bearing mounting seat 5 via bolts. The mounting cylinder is located within the U-shaped groove. An input pulley 8 is fixedly sleeved on the rotating shaft 7. One end of the rotating shaft 7 passes through the right bearing mounting seat 5 and is fixedly sleeved with an input continuously variable transmission pulley 9. The input pulley 8 is connected to the engine output pulley 11 via an input belt 10. The input continuously variable transmission pulley 9 is connected to the output continuously variable transmission pulley 13 via a variable speed V-belt 12. The output continuously variable transmission pulley 13 can be externally connected to other components such as a gearbox or rollers, ultimately realizing the transmission of power from the engine to various end components. The input belt 10 is connected to a belt tensioning mechanism for adjusting the tension of the input belt 10.

[0031] In an embodiment of the present invention, the first end of the bottom support plate 1 is hinged to the connecting frame 15 via a rotating shaft 14, and the second end of the bottom support plate 1 is provided with a lifting mechanism for lifting 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 the two opposite ends of the bottom support plate 1. The engine output pulley 11 is located on one side of the first end of the bottom support plate 1. The line connecting 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 lifting mechanism includes a lifting fixed seat 16 and an up-and-down adjusting push rod 17. The lifting fixed seat 16 is used for fixed connection with the external frame. One end of the up-and-down adjusting push rod 17 is hinged to the lifting fixed seat 16, and the other end of the up-and-down adjusting push rod 17 is connected to the second end of the bottom support plate 1. By setting up the rotating shaft 14 and the lifting mechanism, one end of the bottom support plate 1 can be lifted. When the installation position of the bottom support plate 1 is inconvenient for maintenance, the lifting mechanism can lift it up to fix the bottom support plate 1 and the structure installed on it, making maintenance easier. At the same time, the engine output pulley 11 is set on the side of the bottom support plate 1 where the rotating shaft 14 is located. After being lifted up, the input pulley 8 is close to the engine output pulley 11, and the input pulley 8 is sent, which facilitates the installation and replacement of the input pulley 8.

[0032] In one embodiment of the present invention, the up-and-down adjusting push rod 17 includes a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod. The adjusting cylinder is threadedly connected to the threaded adjusting rod, or the adjusting cylinder is fixedly connected to a nut threadedly connected to the threaded adjusting rod. One end of the threaded adjusting rod is hinged to the lifting fixing seat 16, and the adjusting cylinder is connected to the second end of the bottom support plate 1. Specifically, the adjusting cylinder can abut against the second end of the bottom support plate 1 or be rotatably connected via a ball joint. By rotating the adjusting cylinder, the up-and-down adjusting push rod 17 can be extended or shortened, thereby lifting or lowering the bottom support plate 1, which is convenient to operate.

[0033] In other embodiments of the present invention, the up-and-down adjustment push rod 17 is a cylinder, a hydraulic cylinder, or a linear motor. The bottom support plate 1 can be raised or lowered by a controller.

[0034] In an embodiment of the present invention, the upper surface of the first end of the bottom support plate 1 is provided with 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. 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. The pulley mounting base plate 2 is locked and installed in the strip-shaped holes 18 by the hinge hole bolts 3. The front-back pushing mechanism includes a pushing fixing 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 holes 18. The front-back adjusting push rod 20 is connected to the pushing fixing seat 19, and one end of the front-back adjusting push rod 20 is connected to the first end of the pulley mounting base plate 2. The front and rear pushing mechanism can adjust the installation position of the pulley mounting base plate 2, making it convenient to set the pulley mounting base plate 2 in an inconvenient installation position and make full use of the limited space. By adjusting the front and rear adjusting push rods 20, the pulley mounting base plate 2 can be moved along the length direction of the strip hole 18, thereby realizing the adjustment of the installation position of the pulley mounting base plate 2.

[0035] In one embodiment of the present invention, the front-to-back adjusting push rod 20 is a threaded rod. One end of the front-to-back adjusting push rod 20 passes through the push fixing seat 19 and abuts against the first end of the pulley mounting base plate 2. The front-to-back adjusting push rod 20 is threadedly connected to the push fixing seat 19. Rotating the threaded rod causes it to push the pulley mounting base plate 2 to move along the length direction of the strip hole 18, which is convenient to operate.

[0036] In other embodiments of the present invention, the front-to-back adjusting push rod 20 is a pneumatic cylinder, a hydraulic cylinder, or a linear motor. The front-to-back adjusting push rod 20 is fixedly connected to the push fixing seat 19, and the output end of the front-to-back adjusting push rod 20 is connected to the first end of the pulley mounting base plate 2. The front-to-back adjusting push rod 20, using a pneumatic cylinder, a hydraulic cylinder, or a linear motor, can be controlled by a controller to achieve adjustment of its front-to-back position.

[0037] In an embodiment of the present invention, the belt tensioning mechanism includes 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 mounted on the tensioning seat 21, and a rotating cylinder 26 is sleeved on the fixed shaft 25. One end of the first rotating arm 23 is fixedly connected to the outer wall of the rotating cylinder 26, and the other end of the first rotating arm 23 is fixedly connected to 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 to the outer wall of the rotating cylinder 26. The first rotating arm 23 and the second rotating arm 24 are arranged at an included angle. The other end of the second rotating arm 24 is hinged to one end of a transmission rod 27. A connecting seat 28 and a compression spring 29 are slidably mounted on the transmission rod 27. One end of the compression spring 29 is connected to the connecting seat 28, and the other end of the compression spring 29 is fixedly connected to the transmission rod 27. The connecting seat 28 is installed at the mounting position of the agricultural machinery. Under the action of the compression spring 29, it drives the transmission rod 27, thereby driving the rotating drum 26 to rotate, so that the tensioning wheel 22 abuts against the input belt 10, thereby achieving tensioning of the input belt 10.

[0038] In this invention, the left bearing mounting seat 4 and the pulley mounting plate are a combined structure. When the belt needs to be replaced, the reamed bolt 3 connecting the left bearing mounting seat 4 is removed, and the reamed bolt 3 connecting the right bearing mounting seat 5 is loosened. Since the spherical bearing 6 has a certain adjustment range, the left bearing mounting seat 4 can be raised by about 5°. The input belt 10 can be installed onto the input pulley 8 through the raised gap, thereby avoiding the disassembly and assembly of the bearing and fastening bolts, improving efficiency while ensuring the stability of the transmission system. This invention effectively realizes the transmission of power from the engine output to the end components, while fully considering the convenience of belt disassembly and assembly. It uses a split support structure with reamed bolt 3 to ensure assembly accuracy, and rationally arranges the structure according to the self-aligning characteristics of the ball bearing to achieve convenient belt disassembly and assembly.

[0039] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuously variable transmission structure that facilitates belt disassembly and assembly, characterized in that, The system includes a bottom support plate (1), on the upper surface of which is provided a pulley mounting base plate (2). The pulley mounting base plate (2) is locked onto the bottom support plate (1) by a reamed bolt (3). A left bearing mounting seat (4) and a right bearing mounting seat (5) are provided on the pulley mounting base plate (2) at intervals. The right bearing mounting seat (5) is fixedly connected to the pulley mounting base plate (2). The screw end of the reamed bolt (3) passes through the left bearing mounting seat (4) and the pulley mounting base plate (2) in sequence and is threadedly connected to a nut. The left bearing mounting seat (4) and the right bearing mounting seat (5) are respectively rotatably connected to the two ends of a rotating shaft (7) by a spherical bearing (6). An input pulley (8) is fixedly sleeved on the rotating shaft (7). One end of the rotating shaft (7) passes through the input pulley (8). The right bearing mounting seat (5) is fixedly sleeved with an input continuously variable transmission wheel (9). The input pulley (8) is connected to the engine output pulley (11) via an input belt (10). The input continuously variable transmission wheel (9) is connected to the output continuously variable transmission wheel (13) via a variable speed V-belt (12). The input belt (10) is connected to a belt tensioning mechanism for adjusting the tension of the input belt (10). The first end of the bottom support plate (1) is hinged to the connecting frame (15) via a rotating shaft (14). The second end of the bottom support plate (1) is provided with a lifting mechanism for lifting the second end of the bottom support plate (1). The upper surface of the first end of the bottom support plate (1) is provided with a forward and backward 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).

2. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 1, characterized in that, The lifting mechanism includes a lifting fixed seat (16) and an up-and-down adjusting push rod (17). One end of the up-and-down adjusting push rod (17) is hinged to the lifting fixed seat (16), and the other end of the up-and-down adjusting push rod (17) is connected to the second end of the bottom support plate (1).

3. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 2, characterized in that, The up and down adjusting push rod (17) includes a threaded adjusting rod and an adjusting cylinder sleeved on the threaded adjusting rod. The adjusting cylinder is threadedly connected to the threaded adjusting rod or the adjusting cylinder is fixedly connected to a nut threadedly connected to the threaded adjusting rod. One end of the threaded adjusting rod is hinged to the lifting fixed seat (16), and the adjusting cylinder is connected to the second end of the bottom support plate (1).

4. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 2, characterized in that, The up-and-down adjusting push rod (17) is a pneumatic cylinder, a hydraulic cylinder, or a linear motor.

5. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 1, characterized in that, The bottom support plate (1) is provided with a plurality of strip holes (18) extending from the first end to the second end of the bottom support plate (1) in the length direction. The pulley mounting base plate (2) is locked in the strip holes (18) by the hinge bolt (3). The front and rear pushing mechanism includes a pushing fixed seat (19) fixed on the upper surface of the bottom support plate (1) and a front and rear adjusting push rod (20). The front and rear adjusting push rod (20) is arranged along the length direction of the strip holes (18). The front and rear adjusting push rod (20) is connected to the pushing fixed seat (19), and one end of the front and rear adjusting push rod (20) is connected to the first end of the pulley mounting base plate (2).

6. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 5, characterized in that, The front and rear adjustment push rod (20) is a threaded rod. One end of the front and rear adjustment push rod (20) passes through the push fixing seat (19) and abuts against the first end of the pulley mounting base plate (2). The front and rear adjustment push rod (20) is threadedly connected to the push fixing seat (19).

7. The continuously variable transmission structure for easy belt disassembly and assembly according to claim 5, characterized in that, The front and rear adjustment push rod (20) is a cylinder, a hydraulic cylinder or a linear motor. The front and rear adjustment push rod (20) is fixedly connected to the push fixing seat (19), and the output end of the front and rear adjustment push rod (20) is connected to the first end of the pulley mounting base plate (2).

8. A continuously variable transmission structure for easy belt disassembly and assembly according to any one of claims 1 to 7, characterized in that, The belt tensioning mechanism includes 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 mounted on the tensioning seat (21), and a rotating cylinder (26) is sleeved on the fixed shaft (25). One end of the first rotating arm (23) is fixedly connected to the outer wall of the rotating cylinder (26), and the other end of the first rotating arm (23) is fixedly connected to the tensioning wheel (22). The tensioning wheel (22) abuts against the input belt (10). The outer wall of the rotating cylinder (26) is fixedly connected to one end of the second rotating arm (24). The first rotating arm (23) and the second rotating arm (24) are set at an angle. The other end of the second rotating arm (24) is hinged to one end of the transmission rod (27). A connecting seat (28) and a compression spring (29) are slidably sleeved on the transmission rod (27). One end of the compression spring (29) is connected to the connecting seat (28), and the other end of the compression spring (29) is fixedly connected to the transmission rod (27).

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