A structure for realizing rotation power on-off

Abstract

The utility model discloses a structure for realizing the on-off of rotary power relates to rotary power on-off equipment technical field, including shaft, belt pulley, clutch, piston, piston cylinder, spring, swivel joint, hydraulic system, be equipped with annular recess in belt pulley, be equipped with clutch between annular recess and shaft, and piston cylinder is fixed on the shaft, and the piston is located in the piston cylinder, and the one end of piston is connected with hydraulic system through piston cylinder's oil channel in succession and passes shaft and swivel joint, and the spring for pushing the piston reset is located between the friction piece and the shaft, hydraulic system includes hydraulic station, electromagnetic reversing valve, and electromagnetic reversing valve oil outlet connects the oil way of piston cylinder, and electromagnetic reversing valve oil inlet connects hydraulic station, and controls the oil inlet and unloading of piston cylinder. The on-off of belt pulley rotary power is realized through the built-in clutch of belt pulley, avoids the trouble of premature damage of belt pulley and belt parts, compact structure, shortens the installation space, facilitates the whole machine arrangement, and the convenient dismounting maintenance.

Description

Technical Field

[0001] This utility model relates to the field of rotary power switching equipment technology, and in particular to a structure for realizing rotary power switching. Background Technology

[0002] Currently, agricultural and construction machinery often uses pulleys or sprockets for power transmission over long distances. When power needs to be cut off, it must be done by disconnecting the main power source; however, if the main power source drives multiple drive devices simultaneously, it is not possible to disconnect the power from the pulleys or sprockets individually.

[0003] Currently, most equipment is designed for cost and lightweight construction. Additionally, some equipment cannot be fitted with a separate clutch due to space constraints in the engine room. In these cases, a movable tensioner (for belt tensioning and untensioning) is often used. However, this method causes significant impact and wear on the belt during frequent tensioner movement, often leading to premature belt fatigue and breakage, as well as abnormal wear and slippage of the tensioner and pulley. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a structure for realizing the switching on and off of rotary power, which can save installation space to the maximum extent, effectively avoid a series of fault problems caused by premature damage to key transmission components, and realize the controllable switching on and off of power.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a structure for realizing the switching on and off of rotary power, including a shaft, a pulley, a clutch, a piston, a piston cylinder, a spring, a rotary joint, and a hydraulic system;

[0006] The pulley has an annular groove, and a clutch is provided between the annular groove and the shaft. The clutch includes a pressure plate, a friction plate, and a steel plate. The pressure plate and the steel plate are connected to the shaft via splines. The friction plate is connected to the pulley via splines and makes frictional contact with the pressure plate and the steel plate.

[0007] The piston cylinder is fixed on the shaft, and the piston is located inside the piston cylinder. The end of the piston away from the pressure plate passes through the oil passage of the piston cylinder, passes through the shaft and the rotary joint in sequence, and is connected to the hydraulic system, thus pushing the piston to move axially. A spring for pushing the piston to return to its original position is located between the friction plate and the shaft.

[0008] The hydraulic system includes a hydraulic station and a solenoid directional valve; the outlet of the solenoid directional valve is connected to the oil circuit of the piston cylinder, and the inlet of the solenoid directional valve is connected to the hydraulic station to control the oil inlet and outlet of the piston cylinder.

[0009] Furthermore, the shaft is driven by the engine through the shaft gear transmission of the transfer case, which drives the pulley to rotate and achieve torque output.

[0010] Furthermore, the pressure plate and the steel sheet are provided with a plurality of spring limiting grooves for fixing the springs.

[0011] Furthermore, the hydraulic system also includes a relief valve, which is located between the oil outlet of the solenoid directional valve and the rotary joint, and between the oil outlet of the solenoid directional valve and the hydraulic station, to control and regulate the pressure in the oil circuit.

[0012] Furthermore, a pressure gauge for detecting the pressure inside the oil circuit is provided on one side of the overflow valve.

[0013] Furthermore, the pulley is equipped with two bearings inside. One bearing is located at the connection between the pulley and the shaft, and the other bearing is located in the middle of the pulley. This bearing abuts against the piston cylinder through a retaining ring. A bearing spacer is provided at the gap between the two bearings and the shaft to fix the distance between the two bearings.

[0014] Furthermore, the piston cylinder is fixed to the shaft at one end near the rotary joint by a lock nut and a locking washer.

[0015] Furthermore, the piston cylinder is provided with multiple sealing rings at the contact points with the shaft and piston to prevent oil leakage.

[0016] Based on the above technical solution, the beneficial effects of this utility model are:

[0017] 1. The power supply to the pulley is switched on and off by a built-in clutch, avoiding a series of malfunctions caused by premature damage to the pulley and belt. The structure is compact, reducing installation space, facilitating the overall layout of the machine, and making disassembly and maintenance convenient.

[0018] 2. By installing a release spring inside the piston cylinder, the spring's rebound force enables the friction plates to quickly separate from the pressure plate and steel plates when the clutch disengages, thereby rapidly cutting off power. Simultaneously, the circumferentially arranged multi-spring structure effectively avoids the springs bearing torque, extending their service life and ensuring more thorough friction plate separation, resulting in more stable power switching of the clutch.

[0019] 3. The electromagnetic directional valve controls the direction of the oil circuit and works with the relief valve to achieve closed-loop pressure regulation, improve response speed, meet high-frequency on / off requirements, and save energy and reduce consumption.

[0020] 4. The pulley is equipped with front and rear dual bearings, with fixed spacing between the bearing spacers to optimize dynamic balance, distribute axial load, reduce single-point wear, and extend bearing life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the hydraulic system of this utility model;

[0023] Figure 3 This is a schematic diagram of the pressure plate structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the friction plate structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the steel sheet structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the piston structure of this utility model.

[0027] The markings in the diagram are: 1. Shaft, 2. Pulley, 3. Bearing, 4. Bearing spacer, 5. Pressure plate, 51. First spring limiting groove, 52. First heat dissipation groove, 53. Stepped hole; 6. Friction plate, 61. Second heat dissipation groove, 7. Steel plate, 71. Second spring limiting groove, 72. Unloading hole, 73. Third heat dissipation groove, 8. Piston, 81. Oil unloading groove, 82. Mounting hole, 9. Piston cylinder, 10. Rotary joint, 11. Locking nut, 12. Stop washer, 13. Sealing ring, 14. Heat dissipation hole, 15. Spring, 16. Retaining ring, 17. Hydraulic station, 18. Solenoid directional valve, 19. Pressure gauge, 20. Relief valve, 21. Oil tank, 22. Protective cover, 23. Observation hole. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0030] It should also be noted that the terms "upper," "lower," "left," "right," "front end," and "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component 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. Changes or adjustments to these relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] like Figure 1 and Figures 3-6 As shown, a structure for realizing the switching of rotary power includes a shaft 1, a pulley 2, a clutch, a piston 8, a piston cylinder 9, a spring 15, a rotary joint 10, and a hydraulic system.

[0032] Shaft 1 is driven by the engine via a shaft gear transmission in the transfer case, which in turn rotates pulley 2 to achieve torque output. Pulley 2 has an annular groove, and a clutch is located between the annular groove and shaft 1. The clutch includes a pressure plate 5, friction plates 6, and steel plates 7. The pressure plate 5 and steel plates 7 are connected to shaft 1 via splines, and the friction plates 6 are connected to pulley 2 via splines, making frictional contact with the pressure plate 5 and steel plates 7. The circumference of the pressure plate 5 has multiple first spring limiting grooves 51, and the circumference of the steel plates 7 has correspondingly multiple second spring limiting grooves 71, which cooperate to fix spring 15. The diameter D of the spring limiting grooves is equal to the outer diameter of the spring D0 + 0.75 mm, used to limit the circumferential and axial movement of the spring, preventing scratching with the friction plates. There is no relative rotation between spring 15, steel plates 7, and pressure plate 5, thus preventing torsional damage to the spring. The multi-spring structure on the circumference effectively avoids the spring bearing torque, extending its service life, allowing for more complete separation of the friction plates, and more stable power switching of the clutch.

[0033] The steel plate 7 is also provided with multiple radially arranged third heat dissipation grooves 73 with a width of A, and multiple unloading holes 72 with a diameter of B near the shaft center to avoid stress concentration. Heat dissipation holes 14 are designed as close as possible to the friction heat generation points on the inner cavity and outer circumference of the pulley 2. Simultaneously, multiple radially arranged second heat dissipation grooves 61 with a width of E are provided on the surface of the friction plate 6, which can effectively prevent the heat generated by friction from not being effectively released, thus preventing the friction plate from sintering. The steel plate, friction plate, and pressure plate are equipped with heat dissipation structures to effectively prevent insufficient heat dissipation and significantly improve the service life of the clutch.

[0034] The pulley 2 has two bearings 3 inside. One bearing is located at the connection between the pulley 2 and the shaft 1. The other bearing is located in the middle of the pulley 2 and abuts against the piston cylinder 9 through a retaining ring 16. A bearing spacer 4 is provided at the gap between the two bearings 3 and the shaft 1 to fix the distance between the two bearings 3. The pulley 2 between the bearings 3 and the piston cylinder 9 is provided with heat dissipation holes 14 to improve heat dissipation efficiency. The bearing arrangement can optimize dynamic balance, distribute axial load, reduce single-point wear, and extend bearing life.

[0035] The pulley's rotational power is switched on and off by using a built-in clutch, avoiding a series of malfunctions caused by premature damage to the pulley and belt. The structure is compact, reducing installation space, facilitating the overall layout of the machine, and making disassembly and maintenance convenient.

[0036] Piston cylinder 9 is fixed to shaft 1, and piston 8 is located inside piston cylinder 9. Both piston 8 and piston cylinder 9, and piston cylinder 9 and shaft 1 are sealed. The end of piston 8 facing away from pressure plate 5 passes through the oil passage of piston cylinder 9, sequentially through shaft 1 and rotary joint 10, and connects to the hydraulic system, pushing piston 8 to move axially. Spring 15, which pushes piston 8 to return to its original position, is located between friction plate 6 and shaft 1. Spring 15 is a clutch release spring; when the clutch disengages, the spring's rebound force allows the friction plate to quickly separate from the pressure plate and steel plate, thereby quickly cutting off power. Multiple mounting holes 82 are provided on the end face of piston 8, corresponding to and engaging with stepped holes 53 on pressure plate 5 to achieve precise positioning.

[0037] The piston cylinder 9 is fixed to the shaft 1 at one end near the rotary joint 10 by a locking nut 11 and a retaining washer 12. Multiple sealing rings 13 are provided at the contact points between the piston cylinder 9 and the shaft 1, and between the piston 9 and the piston 8, to prevent oil leakage. In particular, two sealing rings 13 are provided at the ends of the piston 8 and piston cylinder 9 near the friction plate 6 to enhance the sealing effect. An oil drain groove 81 is provided on the end face of the piston 8 near the friction plate 6. The oil drain groove 81 effectively prevents hydraulic oil from contaminating the friction plate 6 after seal failure, and also prevents clutch failure.

[0038] The pulley 2 is also provided with a protective cover 22 at the end near the rotary joint 10. The protective cover 22 is provided with an observation hole 23 to facilitate real-time monitoring of the internal sealing condition.

[0039] like Figure 2As shown, the hydraulic system includes a hydraulic station 17 and a solenoid directional valve 18. The outlet of the solenoid directional valve 18 is connected to the oil circuit of the piston cylinder 9, and the inlet of the solenoid directional valve 18 is connected to the hydraulic station 17. The hydraulic station 17 is the system pressure source, and the solenoid directional valve 18 is used to control the oil inlet and outlet of the piston cylinder 9. The hydraulic system also includes a relief valve 20, which is located between the outlet of the solenoid directional valve 18 and the rotary joint 10, and between the outlet of the solenoid directional valve 18 and the hydraulic station 17. It controls and regulates the pressure in the oil circuit. When the oil circuit pressure exceeds the set value, it automatically releases pressure to prevent the seals from bursting. A pressure gauge 19 is installed on one side of the relief valve 20 to detect the pressure in the oil circuit, enabling pressure visualization and facilitating real-time monitoring and control.

[0040] The electromagnetic directional valve controls the direction of the oil circuit and works with the relief valve to achieve closed-loop pressure regulation, improve response speed, meet high-frequency on / off requirements, and save energy and reduce consumption.

[0041] The working principle of this utility model is as follows:

[0042] When pulley 2 requires power output, the solenoid directional valve 18 is pushed to... Figure 2 In this state, pressurized oil enters the piston cylinder 9 through the pipeline, rotary joint 10, and oil passage hole on shaft 1, pushing piston 8 upward to overcome the elastic force of spring 15, causing pressure plate 5, friction plate 6, and steel plate 7 to press against each other. At this time, the rotational power of shaft 1 is transmitted to pulley 2 for output through the friction between steel plate 7 and friction plate 6.

[0043] When power needs to be cut off, the solenoid directional valve 18 is switched, and the piston cylinder 9 is connected to the oil tank 21 through the oil pipe and depressurized. At this time, the spring 15 pushes the pressure plate 5 towards the piston 8 through the compression and rebound force, forcing the piston 8 to return to its original position. The friction plate 6 separates from the pressure plate 5 and the steel plate 7, and the power of the shaft 1 cannot be transmitted to the pulley 2, thus achieving power interruption.

[0044] During use, it is necessary to regularly maintain the linkage between the various devices in the structure to ensure operational accuracy.

[0045] It should be noted that the above embodiments are only used to illustrate the present utility model, but the present utility model is not limited to the above embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A structure for realizing the switching of rotary power, characterized in that: Includes shaft (1), pulley (2), clutch, piston (8), piston cylinder (9), spring (15), rotary joint (10), and hydraulic system; The pulley (2) is provided with an annular groove, and a clutch is provided between the annular groove and the shaft (1). The clutch includes a pressure plate (5), a friction plate (6) and a steel plate (7). The pressure plate (5) and the steel plate (7) are connected to the shaft (1) by a spline. The friction plate (6) is connected to the pulley (2) by a spline and makes frictional contact with the pressure plate (5) and the steel plate (7). The piston cylinder (9) is fixed on the shaft (1), and the piston (8) is located inside the piston cylinder (9). The end of the piston (8) away from the pressure plate (5) is connected to the hydraulic system through the oil passage of the piston cylinder (9), passing through the shaft (1) and the rotary joint (10) in sequence, and pushing the piston (8) to move axially. The spring (15) used to push the piston (8) to reset is located between the friction plate (6) and the shaft (1). The hydraulic system includes a hydraulic station (17) and an electromagnetic directional valve (18); the outlet of the electromagnetic directional valve (18) is connected to the oil circuit of the piston cylinder (9), and the inlet of the electromagnetic directional valve (18) is connected to the hydraulic station (17) to control the oil inlet and outlet of the piston cylinder (9).

2. The structure for realizing the switching on and off of rotary power according to claim 1, characterized in that: The shaft (1) is driven by the engine through the shaft gear transmission of the transfer case, which drives the pulley (2) to rotate and achieve torque output.

3. The structure for realizing the switching of rotary power according to claim 1, characterized in that: The pressure plate (5) and the steel sheet (7) are provided with multiple spring limiting grooves for fixing the spring (15) on their circumferences.

4. The structure for realizing the switching on and off of rotary power according to claim 1, characterized in that: The hydraulic system also includes a relief valve (20), which is located between the oil outlet of the solenoid directional valve (18) and the rotary joint (10), and between the oil outlet of the solenoid directional valve (18) and the hydraulic station (17), to control and regulate the pressure in the oil circuit.

5. A structure for realizing the switching on and off of rotary power according to claim 4, characterized in that: A pressure gauge (19) for detecting the pressure inside the oil circuit is provided on one side of the overflow valve (20).

6. A structure for realizing the switching on and off of rotary power according to claim 1, characterized in that: The pulley (2) is equipped with two bearings (3). One bearing is located at the connection between the pulley (2) and the shaft (1); the other bearing is located in the middle of the pulley (2). This bearing abuts against the piston cylinder (9) through a retaining ring (16). A bearing spacer (4) is provided at the gap between the two bearings (3) and the shaft (1) to fix the distance between the two bearings (3).

7. A structure for realizing the switching of rotary power according to claim 1, characterized in that: The piston cylinder (9) is fixed to the shaft (1) by means of a locking nut (11) and a stop washer (12) at one end near the rotary joint (10).

8. A structure for realizing the switching of rotary power according to claim 1, characterized in that: The piston cylinder (9) is provided with multiple sealing rings (13) at the contact positions with the shaft (1) and the piston (8) to prevent oil leakage.

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