Stepless speed change driving pulley mechanism

Abstract

The utility model relates to a stepless speed change driving belt wheel mechanism, which belongs to the technical field of vehicle transmission and comprises a fixed disc fixing disc, a fixed disc and a movable disc which are oppositely arranged are sleeved on the outer side of the fixed disc fixing disc, the movable disc is connected with the fixed disc fixing disc in a sliding mode, and the movable disc is connected with a spline of the fixed disc. The outer side of the end, close to the fixed disc and the fixed disc, of the rear intermediate shaft is sleeved with an oil cylinder plunger, the outer side of the oil cylinder plunger is sleeved with a hub, one side of the hub abuts against the side, away from the fixed disc, of the movable disc, one side of the oil cylinder plunger abuts against the side, away from the movable disc, of the hub, and the side, close to the movable disc, of the fixed disc is arranged to be a fixed disc abutting part abutting against the output belt. The side, close to the fixed disc, of the movable disc is provided with a movable disc abutting part abutting against the output belt, the side wall of the oil cylinder plunger is provided with a first oil injection hole penetrating through the oil cylinder plunger, the first oil injection hole penetrates through the position between the oil cylinder plunger and the hub, and the effect of reducing the problems of clamping stagnation, abnormal sound and the like of the movable disc and the fixed disc is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle transmission, in particular to a stepless speed-changing active pulley mechanism. Background Art

[0002] With the continuous improvement of agricultural mechanization, wheat harvester, as one of the important agricultural machinery, plays a vital role in agricultural production. As the core working part of wheat harvester, the performance of wheat harvester stepless speed driving pulley assembly directly affects the working efficiency and quality of the whole machine. The main function of this assembly is to change the diameter of the output belt by adjusting the distance between the moving plate and the fixed plate, and then adjust the speed of the whole machine to adapt to different working conditions and ground conditions.

[0003] However, the mainstream wheat harvester continuously variable speed driving pulley assembly on the market currently has certain limitations in design. In the traditional assembly method, the movement of the driving pulley to adjust the V-groove often relies on the guidance of the guide column, but in the long-term use, due to friction and wear between the guide column and the guide column hole of the fixed plate, it is easy to cause adjustment jamming, abnormal noise and other problems, which not only affects the operating efficiency of the whole machine, but also increases the use cost and maintenance cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a continuously variable speed driving pulley mechanism, aiming to solve at least one of the above technical problems.

[0005] The cam is connected with the drive gear of the hydraulic cylinder to contact with the drive gear of the hydraulic cylinder, and the hydraulic cylinder is connected with the hydraulic cylinder to contact with the drive gear of the hydraulic cylinder.

[0006] The beneficial effect of the utility model is that when working, the hydraulic oil enters the gap between the wheel hub and the cylinder plunger through the first oil filling hole. Through the action of the hydraulic oil, the wheel hub moves to the side close to the fixed plate, driving the movable plate to move on the fixed plate spline, thereby adjusting the distance between the fixed plate abutment part of the fixed plate and the movable plate abutment part of the movable plate. Since the movable plate is connected to the fixed plate by splines, and the movable plate is slidably connected to the fixed plate and the fixed plate, this design allows the movable plate to move smoothly within a certain range, effectively preventing the fixed plate and the movable plate from vibrating, making abnormal noises, and getting stuck, thereby changing the position of the movable plate abutment part that abuts against the output belt, and then realizing stepless speed change. This scheme eliminates the guide column in the assembly of the continuously variable driving pulley, ensuring that there is no guide column and the fixed plate guide column hole is wear-free, vibration-free, and has a low failure rate, greatly reducing the use cost and maintenance cost.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a second oil filling hole penetrating through the side wall of the fixed plate is formed at one end of the fixed plate away from the wheel hub, and one end of the second oil filling hole penetrates to a side of the spline teeth on the inner wall of the movable plate close to the fixed plate.

[0009] The beneficial effect of adopting the above further solution is that by injecting hydraulic oil into the second oil injection hole, the hydraulic oil can be brought into contact with the spline on one side of the movable plate, thereby driving the movable plate to move to the side away from the fixed plate. The hydraulic oil in the second oil injection hole cooperates with the hydraulic oil in the first oil injection hole, thereby driving the movable plate to reciprocate relative to the fixed plate, thereby increasing or decreasing the groove formed between the movable plate contact part and the fixed plate ground contact part, thereby changing the position of the movable plate contact part that contacts the output belt, thereby realizing stepless speed change.

[0010] Furthermore, a first oil seal is connected to the inner wall of the wheel hub at a side of the first oil filling hole close to the fixed plate; and a second oil seal is connected to the inner wall of the wheel hub at a side of the first oil filling hole away from the first oil seal.

[0011] The beneficial effect of adopting the above further scheme is that the first oil seal and the second oil seal can effectively prevent the hydraulic oil from leaking out from the gap between the cylinder plunger and the wheel hub, effectively prevent leakage problems caused by the hydraulic oil pressure, and improve the sealing and reliability of the mechanism.

[0012] Furthermore, a first wear-resistant ring is connected to the inner wall of the wheel hub at a side of the first oil seal away from the first oil filling hole; and a second wear-resistant ring is connected to the inner wall of the wheel hub at a side of the second oil seal away from the first oil filling hole.

[0013] The beneficial effect of adopting the above further solution is that the first wear-resistant ring and the second wear-resistant ring can prevent the leakage of hydraulic oil in the matching gap between the cylinder plunger and the wheel hub.

[0014] Furthermore, a nylon washer is provided between the wheel hub and the moving disc and abuts against both of them.

[0015] The beneficial effect of adopting the above further solution is that the nylon washer can reduce the direct contact between the wheel hub and the moving plate, thereby reducing the friction and wear between the two, and effectively playing a buffering and shock-absorbing role between the wheel hub and the moving plate.

[0016] Furthermore, one end of the movable plate is plugged into the inner side of the fixed plate, and a rubber sealing ring is connected to a side of the outer wall of the movable plate close to the fixed plate.

[0017] The beneficial effect of adopting the above further solution is that the rubber sealing ring can reduce the direct contact between the moving plate and the fixed plate, thereby reducing the wear and friction between them. The rubber sealing ring can also effectively prevent the hydraulic oil from leaking from the gap between the moving plate and the fixed plate, thereby improving the sealing performance.

[0018] Furthermore, the fixed plate and the fixed plate fixing plate are connected via a plurality of positioning pins, and the plurality of positioning pins are arranged at intervals.

[0019] The beneficial effect of adopting the above further solution is that the interval arrangement of multiple positioning pins ensures the precise positioning between the fixed plate and the fixed plate fixing plate, reduces the relative displacement between the two, effectively solves the coaxiality problem of the fixed plate and the fixed plate fixing plate, and improves the stability and reliability of the entire mechanism.

[0020] Furthermore, the wheel hub and the moving plate are connected via a plurality of externally threaded cylindrical pins, and the plurality of externally threaded cylindrical pins are arranged at intervals.

[0021] The beneficial effect of adopting the above further solution is that the external threaded cylindrical pin is tightly connected to the wheel hub and the movable plate through the thread, ensuring the coaxiality requirement of the movable plate in the assembly of the continuously variable driving pulley and ensuring the reliability of the connection between the two.

[0022] Furthermore, a dust ring is connected to one end of the inner wall of the hub away from the fixed plate.

[0023] The beneficial effect of adopting the above further solution is that the dust ring can effectively prevent external dust, particles and other pollutants from entering the interior of the wheel hub, thereby protecting the internal mechanical components from damage.

[0024] Furthermore, the fixed plate abutting portion and the movable plate abutting portion are used to abut against two opposite side walls of the V-belt at the same time.

[0025] The beneficial effect of adopting the above further solution is that when the two side walls of the V-belt are tightly abutted by the abutment parts of the fixed plate and the movable plate at the same time, the contact area between the belt and the pulley is increased, and the friction force is more evenly distributed, which can be applicable to the V-belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a continuously variable driving pulley mechanism of the utility model;

[0027] Figure 2 It is a cross-sectional view of a continuously variable driving pulley mechanism of the utility model;

[0028] Figure 3 The utility model is a cross-sectional view of a continuously variable driving pulley mechanism of a rear intermediate shaft.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Fixed plate; 2. Locating pin; 3. Fixed plate; 4. Moving plate; 5. Rubber sealing ring; 6. Nylon gasket; 7. Wheel hub; 8. Second oil seal; 9. Second wear-resistant ring; 10. Dust ring; 11. Cylinder plunger; 12. Third wear-resistant ring; 13. First oil seal; 14. First wear-resistant ring; 15. Externally threaded cylindrical pin; 16. Oil cup; 20. Rear intermediate shaft; 21. Locking nut; 22. First oil filling hole; 23. Second oil filling hole; 24. Driving oil pipe. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Embodiment 1

[0033] like Figure 1 and Figure 2 As shown, a continuously variable speed driving pulley mechanism is sleeved on the rear intermediate shaft 20, and the mechanism includes a fixed plate fixing plate 1, which is sleeved on one end of the rear intermediate shaft 20, and the fixed plate fixing plate 1 is splined to the rear intermediate shaft 20, and the outer side of the fixed plate fixing plate 1 is sleeved with a fixed plate 3 and a movable plate 4 which are relatively arranged, and one end of the movable plate 4 is inserted into the inner side of the fixed plate 3, and the side of the fixed plate 3 close to the movable plate 4 is set as the fixed plate 3 abutting part abutting against the output belt, and the side of the movable plate 4 close to the fixed plate 3 is set as the movable plate 4 abutting part abutting against the output belt.

[0034] The movable plate 4 is connected to the fixed plate 1 by sliding along the axis direction of the fixed plate 1, and the movable plate 4 is splined to the fixed plate 1. A cylinder plunger 11 is provided on one side of the fixed plate 1, and the cylinder plunger 11 is coaxially sleeved with the fixed plate 1, and a hub 7 is sleeved on the outer side of the cylinder plunger 11, and the inner wall of the hub 7 close to the fixed plate 1 is set to a stepped shape, and the position of the cylinder plunger 11 close to the inner wall of the stepped hub 7 is set to a matching stepped outer wall. The outer wall of the hub 7 away from the end of the fixed plate 1 extends in a direction away from the center line of the hub 7, and the outer wall of the hub 7 abuts against the side of the movable plate 4 away from the fixed plate 3.

[0035] A first oil filling hole 22 penetrating the side wall of the cylinder is provided on the side wall of the cylinder plunger 11, and the first oil filling hole 22 penetrates to one end of the outer wall of the oil steel plunger. The first oil filling hole 22 is located between the stepped and abutting side walls of the cylinder plunger 11 and the wheel hub 7.

[0036] After the continuously variable transmission driving pulley mechanism is installed on the rear intermediate shaft 20, it is locked by tightening the locking nut 21. After the cylinder plunger 11 is assembled with the rear intermediate shaft 20, it is connected by the locking nut 21 to prevent the leakage of hydraulic oil in the axial direction. Figure 3 As shown, during operation, the hydraulic oil enters the first oil filling hole 22 through the driving oil pipe 24 of the rear intermediate shaft 20, and then the hydraulic oil enters the gap between the wheel hub 7 and the cylinder plunger 11 through the first oil filling hole 22. The wheel hub 7 is moved by the hydraulic oil, driving the movable plate 4 to move on the spline of the fixed plate fixed plate 1 toward the end close to the fixed plate 3, thereby reducing the distance between the fixed plate 3 abutting part of the fixed plate 3 and the movable plate 4 abutting part of the movable plate 4. Since the movable plate 4 is connected to the fixed plate 3 through the spline, and the movable plate 4 is slidably connected to the fixed plate fixed plate 1, this design allows the movable plate 4 to move smoothly within a certain range, effectively preventing the fixed plate 3 and the movable plate 4 from vibrating, making abnormal noises, and jamming, thereby changing the position of the abutting part of the movable plate 4 abutting against the output belt, thereby realizing stepless speed change. This solution eliminates the guide post in the assembly of the continuously variable transmission driving pulley, ensures that there is no guide post and the three guide post holes of the fixed plate are free of wear, vibration, abnormal noise and low failure rate, greatly reducing the use cost and maintenance cost.

[0037] A second oil filling hole 23 penetrating the side wall of the fixed plate 1 is formed at one end of the fixed plate 1 away from the hub 7 . One end of the second oil filling hole 23 penetrates to the side of the spline teeth on the inner wall of the movable plate 4 close to the fixed plate 3 . The second oil filling hole 23 is connected to the oil cup 16 .

[0038] By injecting hydraulic oil into the second oil injection hole 23 through the oil cup 16, the hydraulic oil can be brought into contact with the spline on one side of the movable plate 4, thereby driving the movable plate 4 to move to the side away from the fixed plate 3. The hydraulic oil in the second oil injection hole 23 cooperates with the hydraulic oil in the first oil injection hole 22, thereby driving the movable plate 4 to reciprocate relative to the fixed plate 3, thereby increasing or decreasing the groove formed between the contact part of the movable plate 4 and the ground contact part of the fixed plate 3, thereby changing the position of the contact part of the movable plate 4 that contacts the output belt, thereby realizing stepless speed change.

[0039] Embodiment 2

[0040] On the basis of the first embodiment, a rubber sealing ring 5 is connected to the side of the outer wall of the moving plate 4 close to the fixed plate 3. The rubber sealing ring 5 can reduce the direct contact between the moving plate 4 and the fixed plate 3, thereby reducing the wear and friction between them. The rubber sealing ring 5 can also effectively prevent the hydraulic oil from leaking out of the gap between the moving plate 4 and the fixed plate 3, thereby improving the sealing performance.

[0041] Embodiment 3

[0042] On the basis of the first or second embodiment, the abutting portion of the fixed plate 3 and the abutting portion of the movable plate 4 are used to abut against two opposite side walls of the V-belt at the same time, that is, the groove formed between the abutting portion of the movable plate 4 and the ground contact portion of the fixed plate 3 is a V-shaped groove. The V-shaped groove can be applied to the V-belt.

[0043] Embodiment 4

[0044] On the basis of the first, second or third embodiments, the inner wall of the wheel hub 7 is located at the side of the first oil injection hole 22 close to the fixed plate 1 and connected to the first oil seal 13, and the inner wall of the wheel hub 7 is located at the side of the first oil injection hole 22 away from the first oil seal 13 and connected to the second oil seal 8. The inner wall of the wheel hub 7 is located at the side of the first oil seal 13 away from the first oil injection hole 22 and connected to the first wear-resistant ring 14, and the inner wall of the wheel hub 7 is located at the side of the second oil seal 8 away from the first oil injection hole 22 and connected to the second wear-resistant ring 9, and the first wear-resistant ring 14 and the second wear-resistant ring 9 are both made of fluororubber.

[0045] The inner wall of the cylinder plunger 11 is connected with a plurality of third wear-resistant rings 12, each of which is inserted into the inner wall of the cylinder plunger 11 and abuts against the inner wall of the cylinder plunger 11. The third wear-resistant rings 12 are also made of fluororubber.

[0046] Because the wheel hub 7 will slide along the outer circle of the cylinder plunger 11 under the action of the hydraulic oil, the wheel hub 7 and the cylinder plunger 11 will be thrust by the hydraulic oil, and the hydraulic oil pressure will leak outward through the gap between the wheel hub 7 and the cylinder plunger 11. The first wear-resistant ring 14, the second wear-resistant ring 9, the third wear-resistant ring 12, the first oil seal 13 and the second oil seal 8 prevent the hydraulic oil from leaking in the matching gap between the cylinder plunger 11 and the wheel hub 7. The hydraulic oil leakage problem is effectively solved, and the sealing and reliability of the mechanism are improved.

[0047] Embodiment 5

[0048] On the basis of Example 1, Example 2, Example 3 or Example 4, the fixed plate 3 is connected to the fixed plate fixing plate 1 through a plurality of positioning pins 2, and the plurality of positioning pins 2 are arranged at intervals. In the embodiment of the present application, the fixed plate 3 is connected to the fixed plate fixing plate 1 through two positioning pins 2. The wheel hub 7 is connected to the movable plate 4 through a plurality of externally threaded cylindrical pins 15, and the plurality of externally threaded cylindrical pins 15 are arranged at intervals. In the embodiment of the present application, three externally threaded cylindrical pins 15 are arranged on the movable plate 4, and the three externally threaded cylindrical pins 15 cooperate with the positioning holes on the wheel hub 7.

[0049] Since the fixed plate fixing plate 1 and the rear intermediate shaft 20 of the whole machine are connected by splines, the fixed plate fixing plate 1 and the fixed plate 3 are connected by bolts to transmit the power from the rear intermediate shaft 20. Therefore, the fixed plate 3 is connected to the fixed plate fixing plate 1 through multiple positioning pins 2 to ensure the matching accuracy of the fixed plate fixing plate 1 and the fixed plate 3, reduce the relative displacement between the two, effectively solve the coaxiality problem of the fixed plate 3 and the fixed plate fixing plate 1, and improve the stability and reliability of the entire mechanism.

[0050] Since the moving plate 4 is only positioned by the spline tooth side of the fixed plate 1, it cannot meet the needs of the moving plate 4 on the continuously variable driving pulley mechanism. Therefore, the hub 7 is connected to the moving plate 4 through multiple external threaded cylindrical pins 15, and the threaded cylindrical pins are tightly connected to the hub 7 and the moving plate 4 through threads, which effectively ensures the coaxiality of the moving plate 4 relative to the center line of the hub 7 and ensures the reliability of the connection between the two.

[0051] Embodiment 6

[0052] On the basis of the first, second, third, fourth or fifth embodiment, a nylon washer 6 is provided between the hub 7 and the moving plate 4 to abut against both of them, and a dust ring 10 is connected to the inner wall of the hub 7 away from the fixed plate 3.

[0053] The nylon washer 6 can reduce the direct contact between the wheel hub 7 and the moving plate 4, thereby reducing the friction and wear between the two, and effectively playing a buffering and shock-absorbing role between the wheel hub 7 and the moving plate 4. The dust ring 10 can effectively prevent external dust, particles and other pollutants from entering the wheel hub 7, thereby protecting the internal mechanical parts from damage.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A continuously variable speed driving pulley mechanism, characterized in that: The invention comprises a fixed plate (1), the fixed plate (1) is sleeved with a fixed plate (3) and a movable plate (4) which are arranged opposite to each other on the outside, the movable plate (4) is slidably connected to the fixed plate (1), and the movable plate (4) is spline-connected to the fixed plate (3), a cylinder plunger (11) is coaxially sleeved on one side of the fixed plate (1), a wheel hub (7) is sleeved on the outside of the cylinder plunger (11), one side of the wheel hub (7) is in contact with a side of the movable plate (4) away from the fixed plate (3), and the cylinder plunger (11) is coaxially sleeved on one side of the fixed plate (1). The side of the fixed plate (11) abuts against the side of the wheel hub (7) away from the movable plate (4), the side of the fixed plate (3) close to the movable plate (4) is arranged as a fixed plate abutting portion abutting against the output belt, the side of the movable plate (4) close to the fixed plate (3) is arranged as a movable plate abutting portion abutting against the output belt, and a first oil filling hole (22) penetrating through the cylinder plunger (11) is provided on the side wall of the cylinder plunger (11), and the first oil filling hole (22) penetrates between the cylinder plunger (11) and the wheel hub (7).

2. A continuously variable speed driving pulley mechanism according to claim 1, characterized in that: A second oil injection hole (23) penetrating the side wall of the fixed plate (1) is provided at one end of the fixed plate (1) away from the wheel hub (7); one end of the second oil injection hole (23) penetrates to the side of the spline teeth on the inner wall of the movable plate (4) close to the fixed plate (3).

3. A continuously variable speed driving pulley mechanism according to claim 1 or 2, characterized in that: The inner wall of the wheel hub (7) is located at a side of the first oil filling hole (22) close to the fixed plate (1) and is connected to a first oil seal (13); the inner wall of the wheel hub (7) is located at a side of the first oil filling hole (22) away from the first oil seal (13) and is connected to a second oil seal (8).

4. A continuously variable driving pulley mechanism according to claim 3, characterized in that: The inner wall of the wheel hub (7) is located on a side of the first oil seal (13) away from the first oil filling hole (22) and is connected to a first wear-resistant ring (14); the inner wall of the wheel hub (7) is located on a side of the second oil seal (8) away from the first oil filling hole (22) and is connected to a second wear-resistant ring (9).

5. The continuously variable driving pulley mechanism according to claim 1, characterized in that: A nylon washer (6) is provided between the wheel hub (7) and the moving disk (4) and abuts against both of them.

6. The continuously variable driving pulley mechanism according to claim 1, characterized in that: One end of the movable plate (4) is plugged into the inner side of the fixed plate (3), and a rubber sealing ring (5) is connected to a side of the outer wall of the movable plate (4) close to the fixed plate (3).

7. The continuously variable driving pulley mechanism according to claim 1, characterized in that: The fixed plate (3) is connected to the fixed plate fixing plate (1) via a plurality of positioning pins (2), and the plurality of positioning pins (2) are arranged at intervals.

8. The continuously variable driving pulley mechanism according to claim 1, characterized in that: The wheel hub (7) and the moving plate (4) are connected via a plurality of externally threaded cylindrical pins (15), and the plurality of externally threaded cylindrical pins (15) are arranged at intervals.

9. The continuously variable driving pulley mechanism according to claim 1, characterized in that: A dust ring (10) is connected to one end of the inner wall of the wheel hub (7) away from the fixed plate (3).

10. The continuously variable driving pulley mechanism according to claim 1, characterized in that: The fixed plate abutting portion and the movable plate abutting portion are used to abut against two opposite side walls of the V-belt at the same time.

Images