Dry clutch pulley assembly and harvester

Abstract

The utility model relates to agricultural machinery technical field especially relates to a dry clutch pulley assembly and harvester, and the outer pressure disc is fixed in the clutch housing one side, is fixed with the flange shaft on the side surface of clutch housing towards the outer pressure disc, is rotatably equipped with the flange hub on the flange shaft, is fixed with the output pulley on the end of flange hub away from the clutch housing, is equipped with the inner pressure disc on the side surface of clutch housing towards the outer pressure disc, is equipped with the friction plate between the inner pressure disc and the outer pressure disc, is equipped with the annular slide groove on the side surface of clutch housing towards the inner pressure disc, is sealed and is slidably equipped with the piston ring in the annular slide groove, the flange shaft is communicated with the groove bottom of annular slide groove through hydraulic oil channel, and the elastic reset mechanism is fixedly connected with the inner pressure disc. The utility model discloses a new structure and power transmission route are designed, adopt the combination and switching of hydraulic mode control power, have the advantages that control is accurate, transmission is stable, occupies small, and the service life is long.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a dry clutch pulley assembly and a harvester. Background Technology

[0002] In harvesting machinery, belt drives serve as a crucial transmission structure, providing a continuous power source for subsequent operating mechanisms. Currently, most belt transmission systems on the market utilize a combination of pulleys, belt pulleys, and tensioners for power transmission and control. The transmission and disconnection of power between the pulleys and belt can be achieved through the control of the tensioner, offering advantages such as simple structure, low cost, and convenient maintenance. However, this transmission method suffers from drawbacks. The belt undergoes repeated bending and flexing through the tensioner, reducing its lifespan. The tensioner and its associated components are constantly exposed to harsh working conditions. Furthermore, the entire belt transmission system exhibits low transmission efficiency, unstable transmission, and frequent maintenance requirements. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dry clutch pulley assembly and a harvester, which adopts a dry friction plate combination method, has a small overall structure and simple installation, and controls the separation and engagement of the input and output ends of the pulley assembly through the movement of a hydraulic piston, thereby achieving precise control of power transmission.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A dry clutch pulley assembly includes a clutch housing and an outer pressure plate. The clutch housing has a connecting threaded hole in the middle. The outer pressure plate is fixedly disposed on one side of the clutch housing. A flange shaft is fixedly disposed on the side of the clutch housing facing the outer pressure plate. A flange hub is rotatably disposed on the flange shaft. The end of the flange hub away from the clutch housing passes through and extends out of the outer pressure plate. An output pulley is fixedly sleeved on the end of the flange hub away from the clutch housing. An inner pressure plate is provided on the side of the pressure plate, and the inner pressure plate is sleeved on the flange shaft. A friction plate is provided between the inner pressure plate and the outer pressure plate, and the friction plate is slidably disposed on the flange hub via a spline. An annular groove is provided on the side of the clutch housing facing the inner pressure plate. A piston ring is slidably sealed in the annular groove. The flange shaft is connected to the bottom of the annular groove via a hydraulic oil passage. An elastic reset mechanism is uniformly provided on the clutch housing. The elastic reset mechanism is fixedly connected to the inner pressure plate and is used to apply a force to the inner pressure plate to move it away from the friction plate.

[0005] The beneficial effects of this utility model are as follows: By designing a new structure and power transmission route, this utility model adopts a hydraulic method to control the combination and switching of power, providing a set of efficient hydraulic separation pulley structure for high-end harvesting machinery power transmission systems. It has the advantages of precise control, stable transmission, small space occupation, and long service life. It can be applied to any transmission system that requires separate separation and combination, and can also meet the needs of upgrading existing ordinary pulleys.

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

[0007] Furthermore, the elastic reset mechanism includes a support tube, a return spring, and a spring fixing bolt. The clutch housing is provided with a sliding hole, and the support tube is slidably disposed in the sliding hole. The screw end of the spring fixing bolt passes through the support tube and is threadedly connected to the inner pressure plate. The return spring is sleeved on the support tube, with one end of the return spring abutting against the clutch housing and the other end of the return spring abutting against the head of the spring fixing bolt.

[0008] The beneficial effect of adopting the above-mentioned further solution is that the return spring applies a force to the spring fixing bolt, and the inner pressure plate receives the force transmitted by the spring fixing bolt. In the non-working state, the inner pressure plate moves away from the friction plate, thereby causing the friction plate to disengage from the inner and outer pressure plates, so that the friction plate will not rotate with the rotation of the clutch housing.

[0009] Furthermore, a bushing is provided between the inner wall of the support tube and the sliding hole.

[0010] The beneficial effects of adopting the above-mentioned further solutions are: the bushing can effectively reduce the impact force during power engagement, and the bushing is preferably made of high-strength plastic material.

[0011] Furthermore, the flange hub is rotatably mounted on the flange shaft via a support bearing assembly.

[0012] The beneficial effect of adopting the above-mentioned further solution is to ensure the stability and smoothness of the flange hub's rotation relative to the flange shaft.

[0013] Furthermore, the support bearing assembly includes a first support bearing and a second support bearing. The first support bearing and the second support bearing are spaced apart and sleeved on the flange shaft. A limiting protrusion is provided on the outer wall of the flange shaft near the clutch housing. A locking nut is threaded onto the end of the flange shaft away from the clutch housing. The first support bearing, the bearing spacer, and the second support bearing are pressed against the limiting protrusion by the locking nut. The flange hub is sleeved on the first support bearing and the second support bearing. An annular protrusion is provided on the inner wall of the flange hub, and the annular protrusion is located between the first support bearing and the second support bearing.

[0014] The advantages of adopting the above-mentioned further solution are: it facilitates the installation of the support bearing assembly and the flange hub. During installation, firstly, the first support bearing is fitted onto the flange shaft, and the first support bearing is pushed so that it abuts against the limiting protrusion. Then, the bearing spacer is fitted onto the flange shaft and abuts against the side wall of the first support bearing. Next, the flange hub is fitted onto the first support bearing, with one end of the annular protrusion abutting against the side wall of the first support bearing. The bearing spacer is fitted inside the annular protrusion. Then, the second support bearing is fitted onto the flange shaft, with one end of the second support bearing abutting against the other end of the annular protrusion. Finally, the lock nut is threaded onto the flange shaft, with the lock nut abutting against the other end of the second support bearing. Through the above installation steps, the support bearing assembly and the flange hub can be installed easily.

[0015] Furthermore, the hydraulic oil passage includes a flange hydraulic oil passage provided on the flange shaft and a housing hydraulic oil passage provided on the clutch housing. A hydraulic oil inlet is provided at the end of the flange shaft away from the clutch housing. One end of the flange hydraulic oil passage is connected to the hydraulic oil inlet. One end of the housing hydraulic oil passage is connected to the bottom of the annular groove. The other end of the flange hydraulic oil passage is connected to the other end of the housing hydraulic oil passage through a hollow locating pin.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the hydraulic oil passage of the flange and the hydraulic oil passage of the housing are connected by the hollow positioning pin, which avoids the hydraulic oil from entering the gap between the flange shaft and the clutch housing due to the lack of sealing between them.

[0017] Furthermore, the outer ring wall of the annular groove is provided with an outer sealing ring groove, and the inner ring wall of the annular groove is provided with an inner sealing ring groove. An outer sealing ring is provided in the outer sealing ring groove, and an inner sealing ring is provided in the inner sealing ring groove.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the setting of the outer sealing ring and the inner sealing ring can ensure the sealing and sliding of the piston ring in the annular groove.

[0019] Furthermore, a connecting plate is integrally provided at one end of the flange shaft facing the clutch housing, and the connecting plate is fixedly connected to the clutch housing by flange shaft fixing bolts.

[0020] The advantage of adopting the above-mentioned further solution is that the connection plate can facilitate the fixed connection of the flange shaft and the clutch housing.

[0021] Furthermore, a connecting protrusion is integrally provided on the outer peripheral wall of the flange hub, and the output pulley is fixedly connected to the connecting protrusion by pulley fixing bolts.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the setting of the connecting convex ring facilitates the fixed connection between the flange hub and the output pulley.

[0023] This utility model solves the above-mentioned technical problems and also provides a harvester, including the aforementioned dry clutch pulley assembly.

[0024] The beneficial effects of adopting the above solution are as follows: This utility model, through the design of a new structure and power transmission route, uses hydraulic control to control the combination and switching of power, providing a set of efficient hydraulic separation pulley structure for the power transmission system of high-end harvesting machinery. It has the advantages of precise control, stable transmission, small space occupation, and long service life. It can be applied to any transmission system that requires separate separation and combination, and can also meet the needs of upgrading existing ordinary pulleys. Attached Figure Description

[0025] Figure 1 This is a front view of the dry clutch pulley assembly of this utility model; Figure 2 This utility model Figure 1 A cross-sectional view of plane AA in the image; Figure 3 A axial view of the side of the dry clutch pulley assembly of this utility model that has an elastic reset mechanism; Figure 4 A axial view of the side of the dry clutch pulley assembly of this utility model with the output pulley; The attached diagram lists the components represented by each number as follows: 1. Clutch housing; 2. Spring fixing bolt; 3. Spring outer washer; 4. Return spring; 5. Support tube; 6. Spring inner washer; 7. Bushing; 8. Outer pressure plate fixing bolt; 9. Output pulley; 10. Friction plate; 11. Flange shaft fixing bolt; 12. Flange hub; 13. Pulley fixing bolt; 14. Bearing spacer; 15. Lock nut; 16. Flange shaft; 17. First support bearing; 18. Outer pressure plate; 19. Inner pressure plate; 20. Outer sealing ring; 21. Piston ring; 22. Socket head cap screw; 23. Inner sealing ring; 24. End face sealing ring; 25. Hollow locating pin; 26. Second support bearing; 27. Limiting protrusion; 28. Annular protrusion; 29. ​​Flange hydraulic oil passage; 30. Housing hydraulic oil passage; 31. Connecting disc; 32. Connecting convex ring; 33. Connecting threaded hole. Detailed Implementation

[0026] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0027] Example 1 like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment discloses a dry clutch pulley assembly, including a clutch housing 1 and an outer pressure plate 18. The clutch housing 1 has a connecting threaded hole 33 in its center, allowing for external connection of a drive shaft for power input. The outer pressure plate 18 is fixedly mounted on one side of the clutch housing 1. Specifically, the outer pressure plate 18 is fixed to the clutch housing 1 by outer pressure plate fixing bolts 8. A flange shaft 16 is fixedly mounted on the side of the clutch housing 1 facing the outer pressure plate 18. Specifically, a connecting plate 31 is integrally mounted on the end of the flange shaft 16 facing the clutch housing 1. The connecting plate 31 is fixedly connected to the clutch housing 1 by flange shaft fixing bolts 11. The connecting plate 31 facilitates the fixed connection of the flange shaft 16 and the clutch housing 1. The side of the connecting plate 31 abuts against the inner wall of the clutch housing 1.

[0028] A flange hub 12 is rotatably mounted on the flange shaft 16. The end of the flange hub 12 away from the clutch housing 1 passes through and extends out of the outer pressure plate 18. An output pulley 9 is fixedly sleeved on the end of the flange hub 12 away from the clutch housing 1. Specifically, a connecting protrusion ring 32 is integrally provided on the outer peripheral wall of the flange hub 12. The output pulley 9 is fixedly connected to the connecting protrusion ring 32 by a pulley fixing bolt 13. The setting of the connecting protrusion ring 32 facilitates the fixed connection between the flange hub 12 and the output pulley 9.

[0029] The clutch housing 1 has an inner pressure plate 19 on the side facing the outer pressure plate 18. The inner pressure plate 19 is sleeved on the flange shaft 16. A friction plate 10 is provided between the inner pressure plate 19 and the outer pressure plate 18. The friction plate 10 is slidably disposed on the flange hub 12 via a spline.

[0030] The clutch housing 1 has an annular groove on its side facing the inner pressure plate 19. A piston ring 21 is slidably and sealingly disposed within the annular groove. In this embodiment of the invention, an outer sealing ring groove is provided on the outer ring wall of the annular groove, and an inner sealing ring groove is provided on the inner ring wall of the annular groove. An outer sealing ring 20 is provided in the outer sealing ring groove, and an inner sealing ring 23 is provided in the inner sealing ring groove. The outer sealing ring 20 and the inner sealing ring 23 ensure the sealed sliding of the piston ring 21 within the annular groove.

[0031] The flange shaft 16 is connected to the bottom of the annular slide groove through a hydraulic oil passage. The clutch housing 1 is uniformly provided with elastic reset mechanisms. The elastic reset mechanisms are fixedly connected to the inner pressure plate 19 and are used to apply a force to the inner pressure plate 19 to move it away from the friction plate 10.

[0032] The elastic reset mechanism includes a support tube 5, a return spring 4, and a spring fixing bolt 2. The clutch housing 1 has a sliding hole, and the support tube 5 is slidably disposed within the sliding hole. The screw end of the spring fixing bolt 2 passes through the support tube 5 and is threadedly connected to the inner pressure plate 19. The return spring 4 is fitted onto the support tube 5. An outer spring washer 3 is provided between the head of the spring fixing bolt 2 and the end of the support tube 5. An inner spring washer 6 is fitted onto the support tube 5, abutting against the clutch housing 1. One end of the return spring 4 abuts against the inner spring washer 6, and the other end abuts against the outer spring washer 3. The return spring 4 applies a force to the spring fixing bolt 2, and the inner pressure plate 19 receives the force transmitted by the spring fixing bolt 2. In the non-working state, the inner pressure plate 19 moves away from the friction plate 10, thereby causing the friction plate 10 to disengage from the inner pressure plate 19 and the outer pressure plate 18, preventing the friction plate 10 from rotating with the clutch housing 1.

[0033] In an embodiment of this utility model, a bushing 7 is provided between the support tube 5 and the inner wall of the sliding hole. The bushing 7 is preferably made of high-strength plastic material. The bushing 7 can effectively reduce the impact force during power engagement.

[0034] The flange hub 12 is rotatably mounted on the flange shaft 16 via a support bearing assembly. Specifically, the support bearing assembly includes a first support bearing 17 and a second support bearing 26. The first support bearing 17 and the second support bearing 26 are spaced apart and sleeved on the flange shaft 16 via bearing spacers 14. A limiting protrusion 27 is provided on the outer wall of the flange shaft 16 near the clutch housing 1. A locking nut 15 is threaded onto the end of the flange shaft 16 away from the clutch housing 1. The first support bearing 17, the bearing spacers 14, and the second support bearing 26 are pressed against the limiting protrusion 27 by the locking nut 15. The flange hub 12 is sleeved on the first support bearing 17 and the second support bearing 26. An annular protrusion 28 is provided on the inner wall of the flange hub 12, and the annular protrusion 28 is located between the first support bearing 17 and the second support bearing 26.

[0035] The above structure facilitates the installation of the support bearing assembly and the flange hub 12. During installation, firstly, the first support bearing 17 is fitted onto the flange shaft 16, and the first support bearing 17 is pushed so that it abuts against the limiting protrusion 27. Then, the bearing spacer 14 is fitted onto the flange shaft 16 and abuts against the side wall of the first support bearing 17. Next, the flange hub 12 is fitted onto the first support bearing 17, with one end of the annular protrusion 28 abutting against the side wall of the first support bearing 17. The bearing spacer 14 is located inside the annular protrusion 28. Then, the second support bearing 26 is fitted onto the flange shaft 16, with one end of the second support bearing 26 abutting against the other end of the annular protrusion 28. Finally, the locking nut 15 is threaded onto the flange shaft 16, with the locking nut 15 abutting against the other end of the second support bearing 26. Through the above installation steps, the support bearing assembly and the flange hub 12 can be installed easily.

[0036] The hydraulic oil passages include a flange hydraulic oil passage 29 on the flange shaft 16 and a housing hydraulic oil passage 30 on the clutch housing 1. A hydraulic oil inlet is located at the end of the flange shaft 16 furthest from the clutch housing 1. One end of the flange hydraulic oil passage 29 communicates with the hydraulic oil inlet, and one end of the housing hydraulic oil passage 30 communicates with the bottom of the annular groove. The other ends of the flange hydraulic oil passage 29 and the housing hydraulic oil passage 30 are connected by a hollow locating pin 25. The hollow locating pin 25 connects the flange hydraulic oil passage 29 and the housing hydraulic oil passage 30, preventing hydraulic oil from entering the gap between the flange shaft 16 and the clutch housing 1 due to a lack of sealing.

[0037] To further ensure the sealing around the hollow locating pin 25 and prevent oil from flowing out from the gap between the flange shaft 16 and the clutch housing 1, an end face annular groove is provided on the side of the clutch housing 1 that abuts against the connecting plate 31. The hollow locating pin 25 is located inside the inner ring of the end face annular groove, and an end face sealing ring 24 is provided in the end face annular groove.

[0038] In an embodiment of this utility model, in order to facilitate the processing of the flange hydraulic oil passage 29 and the housing hydraulic oil passage 30, the flange hydraulic oil passage 29 extends to the outer peripheral surface of the connecting plate 31, and the housing hydraulic oil passage 30 extends to the outer peripheral surface of the clutch housing 1. Then, the extended openings are sealed and plugged by the internal hexagon set screw 22.

[0039] Working principle: The hydraulic oil inlet can be connected to an external hydraulic rotary joint, and the hydraulic oil pressure can cover 1-2.5Mpa. It is connected to the hydraulic oil passage 30 of the housing through the hollow positioning pin 25. The hollow positioning pin 25 and the end face sealing ring 24 structure ensure good hydraulic oil sealing and no leakage. In the non-working state, the clutch housing, flange shaft 16, inner pressure plate 19, and outer pressure plate 18 rotate synchronously, while the friction plate 10, flange hub 12, and output pulley 9 are in an idling state and stationary. When working, the hydraulic oil is pressed into the oil passage, pushing the piston ring 21 and the inner pressure plate 19 to move axially. The friction plate 10 and the outer pressure plate 18 are rotated synchronously by the end face friction, and finally the power is transmitted to the output pulley 9 through the flange hub 12. When the hydraulic system stops working, the spring force of the return spring 4 realizes the separation of the inner pressure plate 19 and the friction plate 10, so that the rotating parts and non-rotating parts maintain a safe distance and avoid contact wear, abnormal heat generation and other problems.

[0040] Example 2 This embodiment discloses a harvester, including the dry clutch pulley assembly described above.

[0041] This invention, through the design of a new structure and power transmission route, adopts a hydraulic method to control the combination and switching of power, providing a highly efficient hydraulically separated pulley structure for the power transmission system of high-end harvesting machinery. It has the advantages of precise control, stable transmission, small space occupation, and long service life. It can be applied to any transmission system that requires separate separation and combination, and can also meet the needs of upgrading existing ordinary pulleys.

[0042] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0043] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 utility model according to the specific circumstances.

[0045] 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.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dry clutch pulley assembly, characterized in that, The clutch housing (1) includes a clutch housing (1) and an outer pressure plate (18). The clutch housing (1) has a connecting threaded hole (33) in its center. The outer pressure plate (18) is fixedly mounted on one side of the clutch housing (1). A flange shaft (16) is fixedly mounted on the side of the clutch housing (1) facing the outer pressure plate (18). A flange hub (12) is rotatably mounted on the flange shaft (16). One end of the flange hub (12) away from the clutch housing (1) passes through and extends out of the outer pressure plate (18). An output pulley (9) is fixedly fitted on the end of the flange hub (12) away from the clutch housing (1). An inner pressure plate (18) is provided on the side of the clutch housing (1) facing the outer pressure plate (18). 9) The inner pressure plate (19) is sleeved on the flange shaft (16). A friction plate (10) is provided between the inner pressure plate (19) and the outer pressure plate (18). The friction plate (10) is slidably disposed on the flange hub (12) via a spline. An annular groove is provided on the side of the clutch housing (1) facing the inner pressure plate (19). A piston ring (21) is slidably disposed in the annular groove. The flange shaft (16) is connected to the bottom of the annular groove via a hydraulic oil passage. An elastic reset mechanism is uniformly provided on the clutch housing (1). The elastic reset mechanism is fixedly connected to the inner pressure plate (19) to apply a force to the inner pressure plate (19) to move it away from the friction plate (10).

2. The dry clutch pulley assembly according to claim 1, characterized in that, The elastic reset mechanism includes a support tube (5), a return spring (4), and a spring fixing bolt (2). The clutch housing (1) is provided with a sliding hole. The support tube (5) is slidably disposed in the sliding hole. The screw end of the spring fixing bolt (2) passes through the support tube (5) and is threadedly connected to the inner pressure plate (19). The return spring (4) is sleeved on the support tube (5). One end of the return spring (4) abuts against the clutch housing (1), and the other end of the return spring (4) abuts against the head of the spring fixing bolt (2).

3. The dry clutch pulley assembly according to claim 2, characterized in that, A bushing (7) is provided between the support tube (5) and the inner wall of the sliding hole.

4. The dry clutch pulley assembly according to claim 1, characterized in that, The flange hub (12) is rotatably mounted on the flange shaft (16) via a support bearing assembly.

5. A dry clutch pulley assembly according to claim 4, characterized in that, The support bearing assembly includes a first support bearing (17) and a second support bearing (26). The first support bearing (17) and the second support bearing (26) are spaced apart and sleeved on the flange shaft (16) by bearing spacers (14). A limiting protrusion (27) is provided on the outer wall of the flange shaft (1) near the clutch housing (1). A locking nut (15) is threaded on the end of the flange shaft (16) away from the clutch housing (1). The first support bearing (17), the bearing spacers (14) and the second support bearing (26) are pressed against the limiting protrusion (27) by the locking nut (15). The flange hub (12) is sleeved on the first support bearing (17) and the second support bearing (26). An annular protrusion (28) is provided on the inner wall of the flange hub (12). The annular protrusion (28) is located between the first support bearing (17) and the second support bearing (26).

6. A dry clutch pulley assembly according to any one of claims 1 to 5, characterized in that, The hydraulic passage includes a flange hydraulic passage (29) on the flange shaft (16) and a housing hydraulic passage (30) on the clutch housing (1). The flange shaft (16) is provided with a hydraulic oil inlet at one end away from the clutch housing (1). One end of the flange hydraulic passage (29) is connected to the hydraulic oil inlet. One end of the housing hydraulic passage (30) is connected to the bottom of the annular groove. The other end of the flange hydraulic passage (29) is connected to the other end of the housing hydraulic passage (30) through a hollow positioning pin (25).

7. A dry clutch pulley assembly according to any one of claims 1 to 5, characterized in that, The outer ring wall of the annular groove is provided with an outer sealing ring groove, and the inner ring wall of the annular groove is provided with an inner sealing ring groove. An outer sealing ring (20) is provided in the outer sealing ring groove, and an inner sealing ring (22) is provided in the inner sealing ring groove.

8. A dry clutch pulley assembly according to any one of claims 1 to 5, characterized in that, The flange shaft (16) is integrally provided with a connecting plate (31) at one end facing the clutch housing (1), and the connecting plate (31) is fixedly connected to the clutch housing (1) by flange shaft fixing bolts (11).

9. A dry clutch pulley assembly according to any one of claims 1 to 5, characterized in that, The flange hub (12) has an integral connecting ring (32) on its outer peripheral wall, and the output pulley (9) is fixedly connected to the connecting ring (32) by pulley fixing bolts (13).

10. A harvester, characterized in that, Includes the dry clutch pulley assembly as described in any one of claims 1 to 9.

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