Belt tensioning assembly, belt transmission device and combine harvester

Abstract

The utility model relates to the technical field of agricultural equipment, in particular to a belt tensioning assembly, a belt transmission device and a combine harvester. The belt tensioning assembly comprises a fixed tensioning wheel, a movable tensioning wheel and a tensioning adjusting piece. The number of the fixed tensioning wheels is multiple, the fixed tensioning wheels comprise the first fixed tensioning wheel and the second fixed tensioning wheel, the first fixed tensioning wheel is connected with the outer wall of the belt in an abutting mode, the second fixed tensioning wheel is connected with the inner wall of the belt in an abutting mode, and the movable tensioning wheel is used for being connected with the outer wall of the belt in an abutting mode; one of the first fixed tensioning wheel and the movable tensioning wheel is used for being arranged close to a driven belt wheel; the tensioning adjusting piece is connected with the movable tensioning wheel so as to drive the movable tensioning wheel to move. The belt tensioning assembly can effectively adjust the tensioning degree of the belt, and belt jumping is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural equipment, in particular to a belt tensioning assembly, a belt transmission device and a combine harvester. Background Art

[0002] In the overall transmission of large grain combine harvesters, long belt drives are often used. Long belt drives are prone to belt skipping, resulting in wear and damage problems, causing the combine harvester to malfunction, and the cost of long belts is relatively high, seriously affecting the customer's benefits. Therefore, a belt tensioning device is usually provided in the combine harvester to adjust the tension of the belt.

[0003] Currently, the mainly used belt tensioning device includes a tensioning wheel and a tensioning driving member arranged at the middle position of the belt. The tensioning driving member drives the tensioning wheel to press the belt, thereby realizing belt tensioning. The problem is that due to the large center distance of the transmission, the belt is not easy to tension, and there is still a large problem of belt jumping. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a belt tensioning assembly, a belt transmission device and a combine harvester, so as to solve to a certain extent the technical problem that the belt is not easy to tension and there is still a large problem of belt jumping in the prior art.

[0005] The utility model provides a belt tensioning assembly, including: a fixed tensioning wheel, a movable tensioning wheel and a tensioning adjusting member; the number of the fixed tensioning wheels is multiple, including a first fixed tensioning wheel and a second fixed tensioning wheel. The first fixed tensioning wheel abuts against the outer wall of the belt, the second fixed tensioning wheel abuts against the inner wall of the belt, and the movable tensioning wheel is used to abut against the outer wall of the belt; one of the first fixed tensioning wheel and the movable tensioning wheel is used to be arranged close to the driven pulley; the tensioning adjusting member is connected to the movable tensioning wheel to drive the movable tensioning wheel to move.

[0006] The first fixed tensioning wheel among the multiple fixed tensioning wheels can support the belt on the outer side of the belt, and the second fixed tensioning wheel can support the belt on the inner side of the belt; by adjusting the position of the movable tensioning wheel through the tensioning adjusting member, the force of the movable tensioning wheel pressing the belt can be adjusted, thereby adjusting the tension of the belt. The cooperation of the fixed tensioning wheel and the movable tensioning wheel is convenient for tensioning the belt, can effectively reduce the jumping during the belt operation, and prevent belt skipping and damage. In addition, one of the first fixed tensioning wheel and the movable tensioning wheel is arranged close to the driven pulley, which can press the belt part close to the driven pulley towards the inner side of the belt, thereby increasing the wrap angle of the driven pulley, and thus can improve the belt transmission efficiency.

[0007] Further, the first fixed tension pulley, the second fixed tension pulley, and the movable tension pulley are configured to be located on the same side of the belt; the other one of the first fixed tension pulley and the movable tension pulley is configured to be disposed close to the driving pulley.

[0008] Further, the first fixed tension pulley is configured to be disposed close to the driven pulley.

[0009] Further, the first fixed tension pulley and the movable tension pulley are disposed closer to the other side of the belt than the second fixed tension pulley.

[0010] Further, the second fixed tension pulley is located between the first fixed tension pulley and the movable tension pulley.

[0011] Further, the movable tension pulley is located between the first fixed tension pulley and the second fixed tension pulley.

[0012] Further, the belt tensioning assembly further includes a pressure belt pulley; the pressure belt pulley is configured to abut against the outer wall of the belt; and the pressure belt pulley is located on the other side opposite to the side of the belt where the first fixed tension pulley is provided.

[0013] Further, the tension adjusting member includes a driving member and a support plate; the support plate is rotatably connected to the fuselage through a rotating shaft, and the driving member and the movable tension pulley are respectively rotatably connected to two ends of the support.

[0014] The present utility model provides a belt drive device, including: a belt, a driven pulley, a driving pulley, and the above-mentioned belt tensioning assembly; both ends of the belt are respectively sleeved on the driving pulley and the driven pulley; the first fixed tension pulley abuts against the outer wall of the belt to press the belt inward, the second fixed tension pulley abuts against the inner wall of the belt to press the belt outward, and the movable tension pulley is configured to abut against the outer wall of the belt to press the belt inward; one of the first fixed tension pulley and the movable tension pulley is configured to be disposed close to the driven pulley.

[0015] The present utility model provides a combine harvester, including: the above-mentioned belt drive device.

[0016] It should be understood that both the foregoing general description and the following detailed description are for the purpose of illustration and example and are not necessarily limiting to the present disclosure. The accompanying drawings incorporated in and forming a part of the specification illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Structural schematic diagram of the belt drive device according to the first embodiment of the present utility model;

[0019] Figure 2 Structural schematic diagram of the belt drive device according to the second embodiment of the present utility model.

[0020] Icon:

[0021] 1 - First fixed tensioning pulley;

[0022] 2 - Second fixed tensioning pulley;

[0023] 3 - Movable tensioning pulley;

[0024] 4 - Tensioning adjustment member; 41 - Driving member; 42 - Support plate; 411 - Cable; 412 - Spring; 413 - Pull rod;

[0025] 5 - Belt pressing pulley;

[0026] 6 - Belt;

[0027] 7 - Driving belt pulley;

[0028] 8 - Driven belt pulley. Specific embodiments

[0029] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments.

[0030] The components of the embodiments of the present utility model usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model.

[0031] Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0035] As Figure 1 and Figure 2 As shown, an embodiment of the present utility model provides a belt 6 tensioning assembly, including: a fixed tensioning wheel, a movable tensioning wheel 3, and a tensioning adjusting member 4; the number of fixed tensioning wheels is multiple, including a first fixed tensioning wheel 1 and a second fixed tensioning wheel 2. The first fixed tensioning wheel 1 abuts against the outer wall of the belt 6, the second fixed tensioning wheel 2 abuts against the inner wall of the belt 6, and the movable tensioning wheel 3 is used to abut against the outer wall of the belt 6; one of the first fixed tensioning wheel 1 and the movable tensioning wheel 3 is used to be disposed close to the driven pulley 8; the tensioning adjusting member 4 is connected to the movable tensioning wheel 3 to drive the movable tensioning wheel 3 to move.

[0036] It can be understood that the belt 6 in the belt transmission device is annular. In the length direction of the belt 6, the driving pulley 7 and the driven pulley 8 are respectively located on both sides of the belt 6. In the width direction of the belt 6, the belt 6 includes a first side and a second side that are oppositely arranged. The belt portions located on the first side and the second side both form an inner wall and an outer wall.

[0037] In this embodiment, the first fixed tension pulley 1 among the multiple fixed tension pulleys can support the belt 6 on the outer side of the belt 6, and the second fixed tension pulley 2 can support the belt 6 on the inner side of the belt 6; the position of the movable tension pulley 3 is adjusted by the tension adjusting member 4, so that the force with which the movable tension pulley 3 presses the belt 6 can be adjusted, thereby adjusting the tension of the belt 6. The cooperation of the fixed tension pulley and the movable tension pulley 3 facilitates the tensioning of the belt 6, can effectively reduce the jumping of the belt 6 during operation, and prevent the belt from being damaged due to jumping. In addition, one of the first fixed tension pulley 1 and the movable tension pulley 3 is arranged close to the driven pulley 8, which can press the part of the belt close to the driven pulley 8 towards the inner side of the belt 6, thereby increasing the wrap angle of the driven pulley 8, and thus improving the transmission efficiency of the belt 6.

[0038] Among them, the number of fixed tension pulleys can be multiple. Multiple fixed tension pulleys can be arranged on the first side, or multiple fixed tension pulleys can be arranged on the second side, or multiple fixed tension pulleys can be arranged on both the first side and the second side.

[0039] As an alternative solution, as Figure 1 and Figure 2 shown, the first fixed tension pulley 1 and the second fixed tension pulley 2 are located on the same side of the belt 6.

[0040] In this embodiment, the first fixed tension pulley 1 and the second fixed tension pulley 2 are located on the same side of the belt 6, that is, both the first fixed tension pulley 1 and the second fixed tension pulley 2 are located on the first side or the second side of the belt 6. In this way, two fixed tension pulleys can be arranged inside and outside on the same side of the belt 6, making the tensioning of the belt 6 more effective.

[0041] On the basis of the above embodiment, further, the movable tension pulley 3 can be arranged on a different side of the belt 6 from the first fixed tension pulley 1. For example: if the first fixed tension pulley 1 and the second fixed tension pulley 2 are arranged on the first side of the belt 6, then the movable tension pulley 3 is arranged on the second side of the belt 6; if the first fixed tension pulley 1 and the second fixed tension pulley 2 are arranged on the second side of the belt 6, then the movable tension pulley 3 is arranged on one side of the belt 6.

[0042] As an alternative solution, as Figure 1 and Figure 2 shown, the movable tension pulley 3 and the first fixed tension pulley 1 are located on the same side of the belt 6. For example: if the first fixed tension pulley 1 and the second fixed tension pulley 2 are arranged on the first side of the belt 6, then the movable tension pulley 3 is also arranged on the first side of the belt 6; if the first fixed tension pulley 1 and the second fixed tension pulley 2 are arranged on the second side of the belt 6, then the movable tension pulley 3 is arranged on the second side of the belt 6; the other one of the first fixed tension pulley 1 and the movable tension pulley 3 is used to be arranged close to the driving pulley 7.

[0043] In this embodiment, the movable tension pulley 3 and the first fixed tension pulley 1 are located on the same side. One of the first fixed tension pulley 1 and the movable tension pulley 3 is arranged close to the driven pulley 8, and the other is arranged close to the driving pulley 7. Accordingly, the wrap angle of the driving pulley 7 can be increased, and the transmission efficiency can be further improved.

[0044] Among them, the movable tension pulley 3 can be arranged closer to the driven pulley 8 than the first fixed tension pulley 1, or the first fixed tension pulley 1 can be arranged closer to the driven pulley 8 than the movable tension pulley 3.

[0045] As Figure 1 and Figure 2 shown, on the basis of the above embodiment, further, the first fixed tension pulley 1 and the movable tension pulley 3 are arranged on the other side of the belt 6 closer to the second fixed tension pulley 2. By setting like this, the corresponding belt parts between the first fixed tension pulley 1 and the second fixed tension pulley 2 and between the second fixed tension pulley 2 and the movable tension pulley 3 can be tensioned, so that the whole belt 6 is tensioned more stably and effectively, and the belt 6 bounce is further reduced.

[0046] Among them, the movable tension pulley 3 is located between the first fixed tension pulley 1 and the second fixed tension pulley 2.

[0047] As an alternative solution, as Figure 1 and Figure 2 shown, the second fixed tension pulley 2 is located between the first fixed tension pulley 1 and the second fixed tension pulley 2.

[0048] In this embodiment, the second fixed tension pulley 2 is located between the first fixed tension pulley 1 and the movable tension pulley 3, and a triangular structure of two up (in the direction close to the inner side of the belt 6) and one down can be formed, so that the belt 6 is tensioned more effectively and powerfully, and the belt 6 bounce is further reduced.

[0049] As Figure 2 shown, on the basis of the above embodiment, further, the belt 6 tensioning assembly further includes a pressure pulley 5; the pressure pulley 5 is used to abut against the outer wall of the belt 6; and the pressure pulley 5 is located on the other side opposite to the side of the belt 6 where the first fixed tension pulley 1 is provided. Specifically, if the first fixed tension pulley 1, the second fixed tension pulley 2 and the movable tension pulley 3 are arranged on the first side of the belt 6, the pressure pulley 5 is arranged on the second side of the belt 6; if the first fixed tension pulley 1, the second fixed tension pulley 2 and the movable tension pulley 3 are arranged on the second side of the belt 6, the pressure pulley 5 is arranged on the first side of the belt 6.

[0050] In this embodiment, the pressure pulley 5 presses the belt 6 inward, further increasing the wrap angle of the driven pulley 8 and the wrap angle of the driving pulley 7, and further improving the transmission efficiency.

[0051] Among them, the number of the pinch rollers 5 can be one, two, three, four, etc., which can be set according to needs.

[0052] As Figure 1 and Figure 2 shown, on the basis of the above embodiments, further, the tension adjusting member 4 includes a driving member 41 and a support plate 42; the support plate 42 is rotatably connected to the fuselage of the combine harvester through a rotating shaft, and the driving member 41 and the movable tension pulley 3 are respectively rotatably connected to both ends of the bracket (it can be understood that both ends of the support plate 42 are located on both sides of the rotating shaft).

[0053] In this embodiment, the support plate 42 forms a lever structure through the rotating shaft. When the driving member 41 drives one end of the support plate 42 to move away from the belt 6, the other end of the support plate 42 drives the movable tension pulley 3 to press the belt 6 inward; when the driving member 41 drives one end of the support plate 42 to move closer to the belt 6, the other end of the support plate 42 drives the movable tension pulley 3 to move away from the belt 6, so that the pressure on the belt 6 can be reduced, thereby adjusting the tension of the belt 6. The tension adjusting member 4 with this structure is simple in structure and low in cost.

[0054] Among them, the adjusting member can be an electric telescopic rod, a cylinder or an oil cylinder and other electric mechanisms fixed on the fuselage. The adjusting member can also include a cable 411, a spring 412 connected to the cable 411, and a pull rod 413 connected to the spring 412 (which plays a buffering role). One end of the pull rod 413 away from the spring 412 is rotatably connected to the support plate 42. The support plate 42 is driven through the cable 411, and the cable 411 can be fixed on the fuselage, so as to fix the current position of the movable tension pulley 3.

[0055] As Figure 1 and Figure 2 shown, the embodiment of the present invention also provides a belt transmission device, which includes the belt 6 tensioning assembly of any of the above technical solutions, and further includes: a belt 6, a driven belt pulley 8, and a driving belt pulley 7; both ends of the belt 6 are respectively sleeved on the driving belt pulley 7 and the driven belt pulley 8; the first fixed tension pulley 1 abuts against the outer wall of the belt 6 to press the belt 6 inward, the second fixed tension pulley 2 abuts against the inner wall of the belt 6 to press the belt 6 outward, and the movable tension pulley 3 is used to abut against the outer wall of the belt 6 to press the belt 6 inward; one of the first fixed tension pulley 1 and the movable tension pulley 3 is arranged close to the driven belt pulley 8, and the other is arranged close to the driving belt pulley 7. This belt transmission device has all the beneficial technical effects of this belt 6 transmission assembly, and will not be elaborated here.

[0056] The tension of the belt 6 of this belt transmission device is easy and effective to adjust, which can reduce the belt 6 jumping, reduce the belt 6 loss, and extend the service life of the belt 6.

[0057] An embodiment of the present utility model further provides a combine harvester, which includes the belt drive device of any of the above technical solutions. Therefore, it has all the beneficial technical effects of the belt 6 drive assembly, and will not be elaborated here.

[0058] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model. In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies have not been shown in detail so as not to obscure the understanding of this specification. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of the features of different embodiments means that it is within the scope of the present utility model and forms different embodiments.

Claims

1. A belt tensioning assembly, characterized in that: include: Fixed tension wheel, movable tension wheel and tension adjustment member; There are multiple fixed tension wheels, including a first fixed tension wheel and a second fixed tension wheel, the first fixed tension wheel abuts against the outer wall of the belt, the second fixed tension wheel abuts against the inner wall of the belt, and the movable tension wheel is used to abut against the outer wall of the belt; one of the first fixed tension wheel and the movable tension wheel is used to be arranged close to the driven pulley; the tension adjusting member is connected to the movable tension wheel to drive the movable tension wheel to move.

2. The belt tensioning assembly according to claim 1, characterized in that: The first fixed tension wheel, the second fixed tension wheel and the movable tension wheel are used to be located on the same side of the belt; the other of the first fixed tension wheel and the movable tension wheel is used to be arranged close to the driving pulley.

3. The belt tensioning assembly according to claim 2, characterized in that: The first fixed tensioning wheel is used to be arranged close to the driven pulley.

4. The belt tensioning assembly according to claim 2, characterized in that: The first fixed tension wheel and the movable tension wheel are arranged closer to the other side of the belt than the second fixed tension wheel.

5. The belt tensioning assembly according to claim 4, characterized in that: The second fixed tension wheel is located between the first fixed tension wheel and the movable tension wheel.

6. The belt tensioning assembly according to claim 4, characterized in that: The movable tension wheel is located between the first fixed tension wheel and the second fixed tension wheel.

7. The belt tensioning assembly according to claim 2, characterized in that: The belt tensioning assembly further comprises a belt pressure wheel; the belt pressure wheel is used to abut against the outer wall of the belt; and the belt pressure wheel is located on the other side of the belt opposite to the side where the first fixed tensioning wheel is provided.

8. The belt tensioning assembly according to claim 1, characterized in that: The tensioning adjustment member includes a driving member and a support plate; the support plate is rotatably connected to the fuselage through a rotating shaft, and the driving member and the movable tensioning wheel are rotatably connected to two ends of the support plate respectively.

9. A belt transmission device, characterized in that: include: A belt, a driven pulley, a driving pulley and a belt tensioning assembly as described in any one of claims 1 to 8; the two ends of the belt are respectively mounted on the driving pulley and the driven pulley; the first fixed tensioning pulley abuts against the outer wall of the belt to press the belt inward, the second fixed tensioning pulley abuts against the inner wall of the belt to press the belt outward, and the movable tensioning pulley is used to abut against the outer wall of the belt to press the belt inward; one of the first fixed tensioning pulley and the movable tensioning pulley is used to be arranged close to the driven pulley.

10. A combine harvester, characterized in that: include: The belt drive device as claimed in claim 9.

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