Hydraulic pump clutch

Abstract

The present application relates to a kind of hydraulic pump type clutches, including shell assembly, intermeshing driving gear and driven gear.The hydraulic fluid is sealed in shell assembly, driven gear is arranged on shell assembly and can rotate relative to shell assembly.Shell assembly, driving gear constitutes power input unit connected with engine and power output unit connected with gearbox.Shell assembly includes partition body, the inside of partition body contacts with driving gear and driven gear, forms inside seal cavity, and the outside of partition body forms outside seal cavity.Flow regulating assembly is arranged on partition body.The structure of the hydraulic pump type clutch of the present application is simple, the speed of coupling is fast, heating is less, operation is simple, and the degree of coupling is easily controlled.Combination or separation state of clutch can be controlled by controlling flow regulating assembly, when flow regulating assembly is not completely closed, engine and gearbox are separated or partially connected.When flow regulating assembly is completely closed, engine and gearbox are completely connected.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile clutches, and particularly relates to a hydraulic pump type clutch. BACKGROUND

[0002] The clutch is installed between the engine and the transmission of an automobile, and is usually installed together with the flywheel set of the crankshaft of the engine. The clutch is a component for cutting off or transmitting the power output from the engine to the transmission. During the entire process from starting to normal driving or gear shifting of the automobile, the driver can control the clutch according to the need to temporarily separate or gradually engage the engine and the transmission, so as to cut off or transmit the power output from the engine to the transmission.

[0003] Therefore, the clutch has the following functions: first, the clutch can gradually engage the engine and the transmission, so as to ensure the smooth starting of the automobile; second, the clutch can temporarily cut off the connection between the engine and the transmission, so as to facilitate gear shifting; and third, the separation of the clutch can prevent the overload of the transmission when the automobile is braked in an emergency.

[0004] The clutch commonly used in the prior art includes a friction plate type clutch and a hydraulic torque converter. However, the two types of clutches have respective defects. Specifically, the friction plate type clutch is prone to heat generation, and it is difficult to grasp the engagement point and the engagement is prone to jerk. The hydraulic torque converter uses liquid to transmit torque, and has the defect of low efficiency due to the speed difference.

[0005] Therefore, it is necessary to provide a clutch with more stable performance and easy operation. SUMMARY

[0006] (I) Technical problem to be solved

[0007] In order to solve the problems of the clutch in the prior art, such as easy heat generation, slippage, difficult to grasp the engagement point and difficult to operate, the present application provides a hydraulic clutch.

[0008] (II) Technical scheme

[0009] In order to achieve the above-mentioned purpose, the main technical scheme adopted by the present application comprises:

[0010] A hydraulic pump type clutch comprises a housing assembly, and a driving gear and a driven gear which are engaged with each other; the housing assembly is sealed with hydraulic fluid, and the driven gear is arranged on the housing assembly and can rotate relative to the housing assembly;

[0011] One of the housing assembly and the driving gear is a power input unit, and the other is a power output unit;

[0012] The power input unit is connected with an engine, and the power output unit is connected with a gearbox;

[0013] The housing assembly comprises a partition body, an inner arc surface of the partition body is in contact with an outer circle of tooth profiles of the driving gear and the driven gear to form an inner sealing cavity, and an outer side of the partition body forms an outer sealing cavity, and the inner sealing cavity and the outer sealing cavity are respectively located on two sides of a meshing position of the driving gear and the driven gear.

[0014] A flow regulating assembly is arranged on the partition body.

[0015] When the flow regulating assembly is not completely closed, the power input unit drives the driving gear and the driven gear to rotate and pump out the hydraulic fluid, so that the hydraulic fluid between the inner sealing cavity and the outer sealing cavity flows through the flow regulating assembly to circulate, and the driving gear and the housing assembly are in a non-synchronous rotation state.

[0016] When the flow regulating assembly is completely closed, the circulation of the hydraulic fluid between the inner sealing cavity and the outer sealing cavity is blocked, the driving gear and the driven gear cannot relatively rotate due to the hydraulic pressure, and thus are locked, and the housing assembly, the driving gear and the driven gear are in a synchronous rotation state.

[0017] Preferably, the driven gear is provided with two or more driven gears which are distributed around the driving gear and are in mesh with the driving gear.

[0018] Preferably, the number of the partition bodies is the same as that of the driven gears.

[0019] An inner arc surface of the partition body forms an inner sealing cavity with the driven gear and the driving gear, and an outer side of the partition body forms an outer sealing cavity.

[0020] Preferably, the flow regulating assembly comprises flow regulating valves which are respectively arranged on the plurality of partition bodies, and first oil ports and second oil ports are respectively arranged on two sides of the flow regulating valves.

[0021] The first oil ports are directed to the inner sealing cavities, and the second oil ports are directed to the outer sealing cavities.

[0022] Preferably, the flow regulating assembly comprises a flow regulating valve, the flow regulating valve is arranged on only one of the plurality of partition bodies, first oil ports and second oil ports are respectively arranged on two sides of the flow regulating valve, the first oil ports are directed to the inner sealing cavities, and the second oil ports are directed to the outer sealing cavities.

[0023] The plurality of inner sealing cavities are respectively communicated through inner pipelines;

[0024] The plurality of outer sealing cavities are respectively communicated through outer pipelines.

[0025] The inner pipelines and the outer pipelines are arranged outside the housing assembly.

[0026] The housing assembly further comprises a cylindrical sealing shell and a driven gear shaft which is perpendicularly and fixedly connected with the shell.

[0027] The shell comprises two circular end covers and a circumferential body, the partition body is connected with the body and sealingly connected with the two circular end covers, and the two circular end covers respectively clamp the driving gear and the driven gear to provide axial sealing.

[0028] The two ends of the driven gear shaft are perpendicularly and fixedly connected with the two circular end covers.

[0029] The driven gear is arranged on the driven gear shaft and can rotate along the driven gear shaft.

[0030] The inner pipelines and the outer pipelines are arranged outside the circular end covers.

[0031] The flow adjusting assembly further comprises a lever, a pressure plate, a compression spring, a separation bearing and a shift fork.

[0032] The flow adjusting valve is connected with the lever, and the pressure plate is connected with the other end of the lever; the compression spring is arranged between the housing assembly and the pressure plate.

[0033] The separation bearing is arranged on the side of the pressure plate away from the housing assembly, and the shift fork is arranged on the separation bearing.

[0034] (Three) beneficial effects

[0035] The beneficial effects of the present application are:

[0036] The hydraulic pump working principle is applied to the clutch, the driving gear and the housing assembly of the hydraulic pump, especially the gear pump, are arranged as the power input unit and the power output unit, the flow regulating assembly is arranged on the circulating liquid path in the housing assembly, the resistance of the hydraulic fluid is controlled by controlling the opening degree of the flow regulating assembly, so that the relative movement resistance between the driving gear and the housing assembly changes, and the clutch function is realized. When the flow regulating assembly is not completely closed, the oil pumped by the gear pump flows through the flow regulating assembly from one side of the sealed cavity to the other side of the sealed cavity, the clutch functions as a separation function, the engine is separated from the gearbox or partially connected, and when the flow regulating assembly is completely closed, the oil pumped by the gear pump is blocked and cannot flow from one side of the sealed cavity to the other side of the sealed cavity, so that the driving gear and the driven gear are locked and cannot rotate relative to each other due to the pressure, and the clutch completely connects the engine and the gearbox.

[0037] The hydraulic pump clutch has flexible use mode, the driving gear and the housing assembly can be connected with the engine as the power input unit, has simple structure, and each component is very smooth in the working process. The clutch degree can be controlled by controlling the opening degree of the flow regulating assembly, the controllability is high, the clutch speed is fast, the heat generation is small, and the transmission efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is a whole schematic view of the hydraulic pump clutch in the application;

[0039] Figure 2 It is a structure schematic view of the hydraulic pump clutch in the embodiment 1 from another angle;

[0040] Figure 3 It is a structure schematic view of the hydraulic pump clutch in the embodiment 1 from another angle;

[0041] Figure 4 It is a structure schematic view of the hydraulic pump clutch in the embodiment 1 from another angle;

[0042] Figure 5 It is a structure schematic view of the hydraulic pump clutch in the embodiment 2 from another angle;

[0043] Figure 6 It is a whole structure schematic view of the hydraulic pump clutch in the embodiment 2.

[0044]

Explanation of the drawing mark

[0045] 1: driving gear; 2: driven gear; 3: hydraulic fluid; 4: partition body;

[0046] 21: first driven gear; 22: second driven gear; 23: third driven gear;

[0047] 41: First partition; 42: Second partition; 43: Third partition; 44: Outer shell; 441: End cap; 442: Main body; 45: Driven gear shaft;

[0048] 5: First inner sealing cavity; 6: First outer sealing cavity; 7: Second inner sealing cavity; 8: Second outer sealing cavity; 9: Third inner sealing cavity; 10: Third outer sealing cavity; 11: Flow regulating valve; 12: First oil port; 13: Second oil port; 14: First inner pipe; 15: Second inner pipe; 16: First outer pipe; 17: Second outer pipe; 18: Locking groove;

[0049] 19: Operating lever; 20: Pressure plate; 24: Compression spring; 25: Shift fork; 26: Flow control valve mounting position; 27: Release bearing. Detailed Implementation

[0050] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] like Figures 1-6 As shown, this invention provides a hydraulic pump clutch, including a housing assembly and a driven gear 1 and a driven gear 2 that mesh with each other. Hydraulic fluid 3 is sealed inside the housing assembly, and the driven gear 2 is mounted on the housing assembly and is rotatable relative to it. The hydraulic pump clutch can employ hydraulic pumps of various structures, such as gear pumps, piston pumps, or screw pumps. This invention uses a gear pump as an example for specific structural design and description.

[0052] One of the housing assembly and the drive gear 1 is a power input unit, and the other is a power output unit. Specifically, the power input unit is connected to the engine, and the power output unit is connected to the gearbox.

[0053] The housing assembly includes a partition 4. The inner arc surface of the partition 4 is in close contact with the drive gear 1 and the driven gear 2 to form an inner sealed cavity, and the outer side of the partition forms an outer sealed cavity. A flow regulating component is provided on the partition 4.

[0054] When the flow regulation component is fully or partially open, i.e. not fully closed, the power input unit drives the meshing drive gear 1 and driven gear 2 to rotate under the power of the engine.

[0055] If the power input unit is the driving gear 1, the driving gear 1 drives the driven gear 2 to rotate. Due to the meshing relationship, the driven gear 2 and the driving gear 1 rotate in opposite directions. Under the extrusion of the driving gear 1 and the driven gear 2, the hydraulic fluid 3 with the compression characteristic continuously circulates between the inner sealing cavity and the outer sealing cavity. Assuming that the flow regulating valve is fully open at this time, in the ideal state, the circulation of the hydraulic fluid between the inner sealing cavity and the outer sealing cavity is basically free of resistance, which can be regarded as the smooth pumping of the oil by the gear pump. At this time, the driving gear 1 and the driven gear 2 mesh and rotate smoothly, so the driving shaft and the shell rotate smoothly and there is no large torque transmission.

[0056] When the flow regulating assembly is in a partially open state, the circulation of the hydraulic fluid between the inner sealing cavity and the outer sealing cavity is limited by the flow regulating assembly. At this time, the hydraulic fluid passing through the flow regulating assembly is not as smooth as when the flow regulating assembly is fully open, but it can still pass through the flow regulating assembly. However, because there is resistance when the hydraulic fluid passes through the flow regulating assembly, the pressure of the hydraulic fluid inside one of the inner sealing cavity or the outer sealing cavity is relatively high (the specific high-pressure cavity needs to be determined according to the rotation direction of the driving gear), which hinders the reverse rotation of the driven gear 2 and the driving gear 1. It can be regarded as the oil pumping movement of the oil pump becoming difficult, which is specifically reflected in that the relative rotation between the driving shaft and the shell becomes difficult, there is torque transmission between the driving shaft and the shell, one side will rotate at a relatively slow speed following the other side, which is equivalent to the clutch being in a half-engaged state. As the opening degree of the flow regulating assembly becomes smaller, the oil pressure in one side of the sealing cavity becomes larger, and the reverse meshing rotation of the driven gear 2 relative to the driving gear 1 becomes more difficult, which is manifested as the mutual relative rotation between the shell and the driving shaft becoming more difficult, and one side driving the other side to rotate in the same direction and the rotation speed of the two sides becoming closer and closer.

[0057] In the above case, the power transmission process is as follows: from the engine to the driving gear, and then from the driving gear to each driven gear meshing with the driving gear. When the relative meshing rotation between the driving gear and the driven gear becomes difficult, the torque of the driving gear is transmitted to the shell through the shaft of the driven gear.

[0058] If the power input unit is the shell assembly, the driven gear shaft on the shell assembly drives the driven gear to revolve around the driving gear. At the same time, because the driven gear meshes with the driving gear, the driven gear can revolve around its own shaft.

[0059] When the flow regulating assembly is fully open, the gear pump formed by the gear pair pumps the oil from one side of the sealed cavity, flows smoothly through the flow regulating assembly to the other side of the sealed cavity, and forms a cycle back to the suction side of the gear pump. The driven gear 2 rotates smoothly without transmitting torque, and the housing assembly rotates as a whole around the driving gear 1, and the driving gear 1 does not rotate with the housing.

[0060] When the flow regulating assembly is partially open, the circulation of hydraulic fluid between the inner and outer sealed cavities is limited by the flow regulating assembly. At this time, the hydraulic fluid passing through the flow regulating assembly is not as smooth as when the flow regulating assembly is fully open, but it can still pass through the flow regulating assembly. However, because there is resistance when the hydraulic fluid passes through the flow regulating assembly, the pressure of the hydraulic fluid inside one of the inner or outer sealed cavities is higher (the specific high-pressure cavity needs to be determined according to the rotation direction of the driving gear), the gear pump cannot smoothly pump out the oil, and the rotation of the driven gear 2 is blocked. Therefore, the gear and the gear shaft gradually tend to be rigidly coupled, the gear shaft drives the driven gear to rotate in the direction of revolution, and the driving gear 1 rotates in the same direction, and as the opening degree of the flow regulating assembly becomes smaller, the rotation of the driven gear becomes more difficult, and the proportion of the rotation torque converted to the revolution increases, and the rotation speed of the driving gear 1 approaches that of the driven gear 2. The specific phenomenon is that as the flow regulating assembly restricts the flow, it becomes more and more difficult for the gear pump to pump out the oil, and it becomes more and more difficult for the housing and the driving gear to rotate relative to each other, so the degree of torque coupling becomes higher, and the power transmission is in a semi-coupling state.

[0061] In the above case, the power transmission process is as follows: the power is transmitted from the engine to the driven gear shaft of the housing assembly, and then to the driven gear, which automatically allocates the torque required for rotation and revolution according to the opening degree of the flow regulating assembly to drive the driving gear. The smaller the opening degree of the flow regulating assembly, the smaller the portion of the power used to press the hydraulic fluid, and the larger the portion used to drive the driving gear. Therefore, when the flow regulating assembly is not fully closed, the driving gear 1 and the housing assembly are always in the same direction but not in synchronization, and the engine and the transmission are in a separate or partially connected state.

[0062] The hydraulic pump is a device that generates relative displacement between the pump body and the moving parts to change the pressure volume and pump out the liquid. The working principle of the hydraulic pump is applied to the clutch in the present application. The driving gear and the housing assembly of the hydraulic pump, especially the gear pump, are set as the power input unit and the power output unit, and the flow regulating assembly is arranged on the circulating liquid path in the housing assembly. By adjusting the flow regulating assembly to control the difficulty of the flow of hydraulic fluid, i.e. the flow and pressure of hydraulic fluid between the inner and outer sealed cavities, the clutch degree of the hydraulic pump clutch can be controlled.

[0063] The hydraulic pump type clutch of the present application has flexible usage mode, the driving gear and the housing assembly can be connected with the engine as the power input unit, and has simple structure and smooth operation of each component. The clutch degree can be controlled by controlling the switch degree of the flow regulating assembly, which is convenient for user to operate and grasp the clutch degree, has strong controllability, fast clutch speed, less heat generation and high transmission efficiency.

[0064] Embodiment 1

[0065] As shown in Figures 2-4 , the present embodiment provides a hydraulic pump type clutch, which comprises a housing assembly, and a driving gear 1 and a driven gear 2 engaged with each other. The housing assembly is sealed with hydraulic fluid 3, and the driving gear 1 and the driven gear 2 are immersed in the hydraulic fluid 3 as a whole. The driven gear 2 is arranged on the housing assembly and can rotate relative to the housing assembly. In the present embodiment, the hydraulic fluid 3 is incompressible hydraulic oil.

[0066] As shown in Figures 3-4 , the housing assembly comprises a cylindrical sealing shell 44, a driven gear shaft 45 and a partition body 4. The shell 44 comprises two circular end covers 441 and a circumferential body 442 (another end cover is not shown in Figure 3 and Figure 4 ), the two ends of the driven gear shaft 45 are perpendicular to and connected with the two circular end covers 441, the driven gear 2 is arranged on the driven gear shaft 45 and can rotate around the driven gear shaft 45 as the center of rotation, and can rotate together with the housing assembly under the driving of the driven gear shaft 45. The partition body 4 is arranged inside the shell 44 and is integrally formed with the body 442, the partition body 4 is sealingly connected with the two circular end covers 441, and the two circular end covers 441 clamp the driving gear and the driven gear respectively to provide axial sealing. In the present embodiment, the extension direction of the partition body 4 is towards the driving gear 1, the inner side end surface of the partition body 4 contacts with the driving gear 1 and the driven gear 2, and the outer side end surface is towards the shell 44. Specifically, the partition body 4 closely fits with the tooth tips of the driving gear 1 and the driven gear 2, therefore, the inner side of the partition body 4 forms an inner side sealing cavity with the two end covers 441, the driving gear 1 and the driven gear 2, and the outer side of the partition body 4 forms an outer side sealing cavity with the shell 44, the driving gear 1 and the driven gear 2, and the inner side sealing cavity and the outer side sealing cavity are both sealed spaces.

[0067] The gear pump structure is used as the clutch in this embodiment, but the hydraulic oil will generate certain pulsation during rotation of the gear pump, so if the gear pump structure is directly applied to the automobile as the clutch, there will be some slight vibration during clutch operation, which makes the comfort poor. In order to eliminate the pulsation generated during flow of the hydraulic fluid and make the clutch more stable, a plurality of driven gears meshing with the driving gear can be provided, i.e. a plurality of gear pump structures are provided to eliminate the pulsation generated during flow of the hydraulic oil and increase the running stability of the clutch.

[0068] Specifically, the driven gears 2 include a first driven gear 21, a second driven gear 22 and a third driven gear 23, which are completely identical in size and number of teeth and are uniformly distributed on the outside of the driving gear 1.

[0069] Corresponding to the driven gears, the partition body 4 includes a first partition body 41, a second partition body 42 and a third partition body 43, which are completely identical and are alternately arranged, with the inner side end faces closely fitted with the driving gear 1 and each driven gear one by one and the outer side end faces facing the outer shell 44.

[0070] The inner side end face of the first partition body 41 forms a first inner side sealed cavity 5 with the two end covers 441, the first driven gear 21 and the driving gear 1, and the outer side end face of the first partition body 41 forms a first outer side sealed cavity 6 with the outer shell 44, the driving gear and the first driven gear 21. The inner side end face of the second partition body 42 forms a second inner side sealed cavity 7 with the two end covers 441, the second driven gear 22 and the driving gear 1, and the outer side end face thereof forms a second outer side sealed cavity 8 with the outer shell 44, the driving gear 1 and the second driven gear 22. The inner side arc face of the third partition body 43 forms a third inner side sealed cavity 9 with the two end covers 441, the third driven gear 23 and the driving gear 1, and the outer side end face thereof forms a third outer side sealed cavity 10 with the outer shell 44, the driving gear 1 and the third driven gear 23. All the above-mentioned inner side sealed cavities and outer side sealed cavities are sealed cavity bodies.

[0071] The flow regulating assembly includes flow regulating valves 11 arranged on the first partition body 41, the second partition body 42 and the third partition body 43 respectively, and the flow regulating valves 11 have first oil ports 12 and second oil ports 13 arranged on the two sides respectively, with the first oil ports 12 facing the inner side sealed cavities and the second oil ports 13 facing the outer side sealed cavities.

[0072] In this embodiment, the driving gear 1 is connected with the engine as the power input unit, the shell assembly is connected with the transmission as the power output unit, and it is assumed that the driving gear 1 rotates in the clockwise direction. The clutching principle of the hydraulic pump type clutch will be described below:

[0073] The flow regulating valve 11 on each partition is opened, the driving gear 1 rotates clockwise, the three driven gears meshed with it rotate counterclockwise, and the hydraulic oil is continuously extruded by the tooth tips on the driving gear and the driven gears. Taking the first inner side sealing cavity 5 as an example, the hydraulic oil between the tooth tips of the driving gear 1 and the first driven gear 21 is extruded into the first inner side sealing cavity 5, at this time the first inner side sealing cavity 5 is a high pressure cavity, and the third outer side sealing cavity 10 is a low pressure cavity. With the continuous rotation of the gear, part of the hydraulic oil in the first inner side sealing cavity 5 is extruded by the first oil port 12 through the flow regulating valve 11, and then through the second oil port 12 into the first outer side sealing cavity 6, which is a low pressure cavity. Similarly, the hydraulic oil is extruded into the second inner side sealing cavity 7, and then reaches the second outer side sealing cavity 8 through the next group of flow regulating valves, and is extruded into the third inner side sealing cavity 9 by the gear, and then reaches the third outer side sealing cavity 10 through the next group of flow regulating valves, and continuously repeats the above-mentioned circulating flow path. In the process of the above-mentioned hydraulic oil circulating flow, the hydraulic oil in the first inner side sealing cavity 5, the second inner side sealing cavity 7 and the third inner side sealing cavity 9 is pressed in, which belongs to a high pressure cavity; the hydraulic oil in the first outer side sealing cavity 6, the second outer side sealing cavity 8 and the third outer side sealing cavity 10 is extruded out, which belongs to a low pressure cavity; the first oil port 12 towards the inner side sealing cavity is an oil inlet port, and the second oil port 13 towards the outer side sealing cavity is an oil outlet port.

[0074] When the flow regulating valve is fully closed, the driven gear 2 and the driving gear 1 rotate synchronously, and the clutch connects the engine and the gearbox completely. When the flow regulating valve is fully opened, the hydraulic oil still has a certain flow resistance, so there is still a certain degree of relative movement between the driven gear 2 and the driving gear 1, but in this state, the reverse meshing rotation speed of the driven gear 2 relative to the driving gear 1 is the maximum, but the driven gear 2 as a whole will rotate along with the shell assembly in the same direction as the driving gear 1, and the clutch is connected to the minimum extent. When the flow regulating valve 11 is in a partially open state, the circulating flow of the hydraulic oil is limited by the flow regulating valve, which causes the pressure of the hydraulic oil in the inner sealing cavity to be relatively high, thereby hindering the reverse rotation of the driven gear 2 and the driving gear 1. Specifically, the reverse meshing rotation of the driven gear 2 relative to the driving gear 1 is hindered, so that the reverse meshing rotation of the driven gear 2 relative to the driving gear 1 becomes difficult, the reverse meshing rotation speed of the driven gear 2 relative to the driving gear 1 is slow, and the driven gear 2 will rotate along with the shell assembly as a whole along the driving gear 1, the rotation direction is the same as that of the driving gear 1, but the rotation speed is less than that of the driving gear 1. As the opening degree of the flow regulating valve becomes smaller and smaller, the reverse meshing rotation speed of the driven gear 2 relative to the driving gear 1 becomes smaller and smaller, and the rotation speed of the shell assembly as a whole along the driving gear 1 in the same direction but at different speeds becomes faster and faster. Conversely, as the opening degree of the flow regulating valve becomes larger and larger, the reverse meshing rotation speed of the driven gear 2 relative to the driving gear 1 becomes larger and larger, and the rotation speed of the shell assembly as a whole along the driving gear 1 in the same direction but at different speeds becomes slower and slower. Therefore, by changing the opening degree of the flow regulating valve, the clutching degree of the clutch can be changed.

[0075] When the flow regulating valve 11 on each partition is fully closed, because the hydraulic fluid 3 has the characteristic of not being compressed, the hydraulic fluid in all the inner sealing cavities and the outer sealing cavities will stop circulating, the relative movement between the driving gear 1 and the driven gear 2 will stop, the driven gear 2 will completely cooperate with the movement of the driving gear 1, and the shell assembly will rotate synchronously with the driving gear 1, thereby completely connecting the engine and the gearbox.

[0076] When the driving gear 1 rotates in the counterclockwise direction, the above-mentioned low-pressure cavity and the high-pressure cavity are adjusted relative to each other, and the oil inlet and the oil outlet are adjusted relative to each other.

[0077] In this embodiment, the sealing of the gear pump cannot be absolutely guaranteed, and although the contact surface between the driven gear 2 and the partition body 4 is in a close sealing state, there still exists a small gap. Therefore, in actual use, after the flow regulating valve 11 is completely closed for a period of time, a small amount of hydraulic oil will leak from the high-pressure chamber to the low-pressure chamber, so that the hydraulic oil pressure in the high-pressure chamber is insufficient, and the relative rotation between the driving gear 1 and the driven gear 2 will occur, which will destroy the completely connected state of the clutch. In order to solve the above problem, the locking assembly is further provided in this embodiment, which includes a locking groove 18 provided on one of the driven gears 2 and an elastic plunger provided on the housing 44. The elastic plunger can be extended and retracted along the axial direction of the housing 44 to be inserted into or separated from the locking groove 18. When the elastic plunger is inserted into the locking groove 18, the driven gear 2 is locked with the housing assembly, thereby ensuring that the clutch has a transmission efficiency of 100%.

[0078] In addition, the temperature of the hydraulic oil will rise during continuous circulation, and therefore, the flow regulating valve 11 in this embodiment needs to be selected from a valve body that is not sensitive to temperature.

[0079] In addition, the opening degree of the flow regulating valve 11 is controlled by the extension and retraction of the operating rod 19 on the flow regulating valve 11. As shown in FIG. 2, the installation direction of the operating rod 19 is parallel to the transmission shaft of the clutch, and the top end of the operating rod is provided with a pressure plate 20. A compression spring 24 with a pre-pressing force is arranged between the pressure plate 20 and the housing 44, and the compression spring 24 can push the pressure plate 20 away from the housing 44 to adjust the opening degree of the flow regulating valve. Figure 1

[0080] When the yoke 25 presses the separation bearing 27 towards the housing assembly, the separation bearing 27 pushes the pressure plate 22 to move towards the housing assembly, and at the same time, the pressure plate 22 pushes the operating rod 19 to retract inwardly. When the yoke 25 releases the separation bearing 27 to the outside, the compression spring 24 pushes the pressure plate 20 to move outwardly, and at the same time, the operating rod 19 is pulled to extend outwardly. In this way, the area of the passage in the flow regulating valve 11 is changed, the smoothness of the hydraulic oil flow is changed, and the coupling degree between the housing assembly and the driving gear is changed, thereby playing the role of the clutch.

[0081] Embodiment 2

[0082] The difference between this embodiment and embodiment 1 is that the housing assembly is connected with the engine as a power input unit, and the driving gear 1 is connected with the transmission as a power output unit.

[0083] ​Take the clockwise rotation of the housing assembly as an example: open the flow regulating valve 11 on the partition body 4, the housing assembly will drive the driven gear 2 to rotate synchronously under the action of the engine, the hydraulic oil is constantly extruded by the tooth tips on the driving gear and the driven gear, take the first outer seal cavity 6 as an example, the hydraulic oil between the driving gear 1 and the first driven gear 21 is extruded into the first outer seal cavity 6, at this time, the first outer seal cavity 6 is a high pressure cavity, and the second inner seal cavity 7 is a low pressure cavity. In the process of the above-mentioned circulation of the hydraulic oil, the hydraulic oil in the first inner seal cavity 5, the second inner seal cavity 7 and the third inner seal cavity 9 is extruded out, which belongs to a low pressure cavity; the hydraulic oil in the first outer seal cavity 6, the second outer seal cavity 8 and the third outer seal cavity 10 is pressed in, which belongs to a high pressure cavity. Contrary to the embodiment 1, the first oil port 12 is an oil outlet, and the second oil port 13 is an oil inlet.

[0084] When the flow regulating valve is fully opened, the driven gear 2 and the housing assembly as a whole rotate along the driving gear 1, at this time, the hydraulic oil still has a certain pressure, only the pressure is minimum, the driving gear 1 is still driven to rotate in the same direction by the driven gear, only the rotation speed is in the minimum state, so that the separation degree of the engine and the gearbox is maximum.

[0085] When the flow regulating valve is fully closed, the hydraulic fluid cannot circulate through the flow regulating valve, the relative motion between the driving gear 1 and the driven gear 2 stops, at this time, the driving gear 1 and the driven gear 2 are similar to rigid connection, the driving gear 1, the driven gear 2 and the housing assembly are soon in a synchronous rotation state, having the same rotation speed, so as to realize the complete connection of the engine and the gearbox.

[0086] When the flow regulating valve is in a partially open state, the circulation of the hydraulic fluid between the inner seal cavities and the outer seal cavities is limited by the flow regulating valve, at this time, the hydraulic fluid passing through the flow regulating valve is not as smooth as when the flow regulating valve is fully open, but it can still pass through the flow regulating valve. However, because there is resistance when the hydraulic fluid passes through the flow regulating valve, the pressure of the hydraulic fluid inside the outer seal cavity is relatively high, the driven gear 2 drives the driving gear 1 to rotate in the same direction, but the rotation speed of the driving gear 1 is less than that of the driven gear 2. And, the smaller the opening degree of the flow regulating valve, the closer the rotation speed of the driving gear 1 and the rotation speed of the driven gear 2. Conversely, the greater the opening degree of the flow regulating valve, the greater the difference between the rotation speed of the driving gear 1 and the rotation speed of the driven gear 2.

[0087] When the housing assembly and the driven gear 2 rotate in the counterclockwise direction, the above-mentioned low pressure cavities and high pressure cavities are adjusted to each other, and the oil inlet and the oil outlet are exchanged with each other.

[0088] Embodiment 3

[0089] AsFigures 5-6 The embodiment shown provides a hydraulic pump type clutch, which is different from the embodiment 1 in that only one flow regulating valve is arranged on the first driven gear 21.

[0090] Similarly, the first oil port 12 of the flow regulating valve 11 is arranged on the side of the first inner seal cavity 5, and the second oil port 13 of the flow regulating valve 11 is arranged on the side of the first outer seal cavity 6.

[0091] The first inner seal cavity 5 and the second inner seal cavity 7 are communicated through the first inner side pipeline 14, and the second inner seal cavity 7 and the third inner seal cavity 9 are communicated through the second inner side pipeline 15. The first outer seal cavity 6 and the second outer seal cavity 8 are communicated through the first outer side pipeline 16, and the second outer seal cavity 8 and the third outer seal cavity 10 are communicated through the second outer side pipeline 17.

[0092] The first inner seal cavity 5, the second inner seal cavity 7 and the third inner seal cavity 9 are connected as a whole through the first inner side pipeline 14 and the second inner side pipeline 15, and the hydraulic oil can circulate in them. The above-mentioned inner seal cavities are communicated with the first oil port of the flow regulating valve, and the hydraulic oil in the inner seal cavities can flow through the flow regulating valve through the first oil port.

[0093] The first outer seal cavity 6, the second outer seal cavity 8 and the third outer seal cavity 10 are connected as a whole through the first outer side pipeline 16 and the second outer side pipeline 17, and the above-mentioned outer seal cavities are communicated with the second oil port of the flow regulating valve, and the hydraulic oil in the outer seal cavities can flow through the flow regulating valve through the second oil port.

[0094] The above-mentioned first inner side pipeline 14, the second inner side pipeline 15, the first outer side pipeline 16 and the second outer side pipeline 17 can be arranged on the end cover 441 of the housing assembly, or can be arranged on the body 442. As long as all the inner seal cavities are communicated with each other, all the outer seal cavities are communicated with each other, and the inner seal cavities and the outer seal cavities are isolated from each other.

[0095] The same as the embodiment 1 and the embodiment 2, the different power input units and the different rotation directions of the power input units clockwise and counterclockwise will make the above-mentioned inner seal cavities and outer seal cavities become high pressure cavities or low pressure cavities.

[0096] In the embodiment, the high pressure hydraulic oil in all the high pressure cavities flows back into all the low pressure cavities after passing through the flow regulating valve, and only one flow regulating valve needs to be arranged in the whole clutch, which can effectively save the cost. In addition, the embodiment only arranges one flow regulating valve to control the flow of the hydraulic oil, and at the same time, the pipelines are arranged to make the hydraulic oil circulate between the seal cavities, which can also weaken the pulsation caused by the rotation of each gear pump.

[0097] The above examples are only used to explain the present application and do not constitute limitation to the protection scope of the present application. Those skilled in the art can make various modifications or changes within the scope of the claims, and all of them belong to the essential content of the present application.

Claims

1. A hydraulic pump clutch, characterized by, The application relates to a hydraulic torque converter, which comprises a housing assembly, a driving gear (1) and a driven gear (2) engaged with each other, and hydraulic fluid (3) sealed in the housing assembly, wherein the driven gear (2) is arranged on the housing assembly and can rotate relative to the housing assembly. The housing assembly and one of the driving gear (1) are power input units, and the other is a power output unit. The power input unit is connected with an engine, and the power output unit is connected with a gearbox. The housing assembly comprises a partition body (4), the inner arc surface of the partition body (4) is an arc surface, which is in contact with the tooth profile circumcircle of the driving gear (1) and the driven gear (2) to form an inner sealing cavity; the outer side of the partition body (4) forms an outer sealing cavity; the inner sealing cavity and the outer sealing cavity are respectively located on the two sides of the meshing position of the driving gear and the driven gear. A flow regulating assembly is arranged on the partition body (4). When the flow regulating assembly is not completely closed, the power input unit drives the driving gear (1) and the driven gear (2) to rotate and pump out the hydraulic fluid (3), so that the hydraulic fluid between the inner sealing cavity and the outer sealing cavity flows through the flow regulating assembly to circulate, and the driving gear (1) and the housing assembly are in a non-synchronous rotation state. When the flow regulating assembly is completely closed, the circulation of the hydraulic fluid between the inner sealing cavity and the outer sealing cavity is blocked, so that the driving gear (1) and the driven gear (2) cannot rotate relative to each other due to the hydraulic pressure, thereby being locked, and the housing assembly, the driving gear (1) and the driven gear (2) are in a synchronous rotation state. The driven gear (2) is arranged in two or more and is distributed around the driving gear (1) and engaged with the driving gear; the number of the partition bodies (4) is the same as that of the driven gears (2). The inner arc surface of the partition body (4) and the driven gear (2) and the driving gear (1) form an inner sealing cavity, and the outer side of the partition body (4) forms an outer sealing cavity. The flow regulating assembly comprises flow regulating valves (11) arranged on the plurality of partition bodies (4) respectively, and first oil ports (12) and second oil ports (13) are arranged on the two sides of the flow regulating valves (11) respectively. The first oil port (12) faces the inner sealing cavity, and the second oil port (13) faces the outer sealing cavity. The application further relates to a locking assembly, which comprises a locking groove arranged on the driven gear and an elastic plunger arranged on the housing, and the elastic plunger can be inserted into or separated from the locking groove along the axial direction of the housing. When the elastic plunger is inserted into the locking groove, the driven gear is locked with the housing assembly.

2. The hydraulic pump clutch of claim 1, wherein The flow regulating assembly comprises a flow regulating valve (11); the flow regulating valve (11) is arranged on one of the plurality of partition bodies (4) only; a first oil port (12) and a second oil port (13) are arranged on both sides of the flow regulating valve (11) respectively, the first oil port (12) faces the inner sealing cavity, and the second oil port (13) faces the outer sealing cavity.

3. The hydraulic pump clutch of claim 2, wherein, The plurality of inner sealing cavities are communicated by inner pipelines respectively; The plurality of outer sealing cavities are communicated by outer pipelines respectively.

4. The hydraulic pump clutch of claim 3, wherein, The inner pipelines and the outer pipelines are arranged outside the shell assembly.

5. The hydraulic pump clutch according to any one of claims 3 or 4, characterized in that The shell assembly further comprises a cylindrical sealing shell (44) and a driven gear shaft (45) which is vertically and fixedly connected with the shell (44); The shell (44) comprises two circular face end covers (441) and a circumferential main body (442), the partition body (4) is connected with the main body (442) and is sealingly connected with the two circular face end covers (441); the two circular face end covers (441) clamp the driving gear and the driven gear respectively to provide axial sealing; Both ends of the driven gear shaft (45) are vertically and fixedly connected with the two circular face end covers (441) respectively; The driven gear (2) is arranged on the driven gear shaft (45) and can rotate along the driven gear shaft (45); The inner pipelines and the outer pipelines are arranged outside the circular face end covers.

6. The hydraulic pump clutch of claim 1 or claim 2, wherein, The flow regulating assembly further comprises a joystick (19), a pressure plate (20), a compression spring (24), a separation bearing (27) and a shift fork (25); The flow regulating valve (11) is connected with the joystick (19), and the pressure plate (20) is connected with the other end of the joystick (19); the compression spring (24) is arranged between the shell assembly and the pressure plate (20); The separation bearing (27) is arranged on the side of the pressure plate (20) away from the shell assembly, and the shift fork (25) is arranged on the separation bearing (27).

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