A hydraulic clutch device structure for a reduction gearbox

Abstract

This utility model discloses a hydraulic clutch device structure for a gearbox, including a clutch assembly, a reducer assembly, a control cylinder assembly, and a gearbox assembly. The clutch assembly includes a sliding sleeve and a gear sleeve, the sliding sleeve being drively connected to the gearbox assembly, and the gear sleeve being drively connected to the reducer assembly. The control cylinder assembly includes a control cylinder body and a piston shaft movably disposed within the control cylinder body. The control cylinder body is provided with a control chamber and a control oil circuit communicating with the control chamber. The piston shaft includes a connecting rod, a spring mounting rod, a shoulder shaft, and a hydraulic drive rod arranged in a front-rear direction. The connecting rod is connected to the sliding sleeve, and a return spring is sleeved on the spring mounting rod. The two ends of the return spring abut against the gearbox assembly and the shoulder shaft, respectively. The hydraulic drive rod is slidably disposed within the control chamber. This utility model can hydraulically control the power transmission or disconnection between the gearbox assembly and the reducer assembly.

Description

Technical Field

[0001] This utility model relates to automotive components, specifically to a hydraulic clutch device structure for a gearbox. Background Technology

[0002] Currently, most special vehicles in China are equipped with compressed air sources for vehicle braking and control of the axle clutch differential lock. For example, CN105134944A discloses a main reducer assembly with a disengagement / engagement mechanism, including a main drive component, a differential component, and a differential lock mounted on the differential component. The main drive component includes a bearing housing and a drive gear shaft connected to the bearing housing via a first rolling bearing and a second rolling bearing. The upper end of the bearing housing of the main drive component is connected to the housing of the differential component. The drive gear at the upper end of the drive gear shaft of the main drive component meshes with the driven gear of the differential component. An upper engagement sleeve is connected to the lower part of the drive gear shaft. A disengagement / engagement mechanism is connected to the lower part of the main drive component. The lower engagement sleeve of the disengagement / engagement mechanism corresponds to / meets with the upper engagement sleeve. This invention can adapt to different road conditions and achieve the engagement or disengagement of the drive shaft and the main drive gear shaft by inputting and discharging compressed air, meeting the requirements for disengagement / engagement of power transmission during vehicle operation.

[0003] However, with the deepening development of the special vehicle industry and the stringent requirements of vehicle operating environments, compressed air sources are no longer sufficient to meet the demands of vehicle operation. Existing technologies that can control the axle differential lock use high-pressure air as the control medium. This structure, using high-pressure air as the control medium, can only withstand pressures of 0.8-1 MPa. The control cylinder assembly cannot meet the minimum pressure requirements of high-pressure oil. Therefore, it is not possible to directly replace the control medium of the existing gearbox with high-pressure oil using a pneumatic clutch device. A simple, easy-to-control, and reliable device needs to be designed that can still achieve the purpose of controlling the axle clutch differential lock when the vehicle only has a hydraulic power source. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a hydraulic clutch device structure for a gearbox, which can control the power transmission or disconnection between the gearbox assembly and the reducer assembly through hydraulic control.

[0005] The present invention discloses a hydraulic clutch device structure for a gearbox, comprising a clutch assembly, a reducer assembly, a control cylinder assembly, and a gearbox assembly;

[0006] The clutch assembly includes a sliding sleeve and a gear sleeve. The sliding sleeve is drivenly connected to the gearbox assembly, and the gear sleeve is drivenly connected to the reducer assembly.

[0007] The control cylinder assembly includes a control cylinder body and a piston shaft movably disposed within the control cylinder body; the control cylinder body is provided with a control cavity and a control oil passage communicating with the control cavity; the piston shaft includes a connecting rod, a spring mounting rod, a shoulder shaft, and a hydraulic drive rod arranged in a front-rear direction; the connecting rod is connected to the sliding sleeve; the spring mounting rod is fitted with a return spring; the two ends of the return spring respectively abut against the gearbox assembly and the shoulder shaft; the hydraulic drive rod is slidably disposed within the control cavity.

[0008] By pressurizing the control oil circuit, hydraulic oil can be input into the control chamber, causing the piston shaft to drive the sliding sleeve to engage with the gear sleeve; by depressurizing the control oil circuit, under the action of the return spring, the hydraulic oil in the control chamber is discharged, and the piston shaft drives the sliding sleeve to separate from the gear sleeve.

[0009] Furthermore, the piston shaft also includes a guide rod connected to the hydraulic drive section, and the control cylinder body is also provided with a guide hole communicating with the control cavity, and the guide rod is slidably engaged with the guide hole.

[0010] Furthermore, both the hydraulic drive rod and the guide hole are provided with annular grooves, and sealing structures are installed in the annular grooves.

[0011] Furthermore, it also includes an indicator switch assembly and an exhaust valve assembly. The control cylinder body is also provided with a switch mounting hole communicating with the guide hole and an exhaust valve mounting hole communicating with the control oil circuit. The indicator switch assembly is connected to the switch mounting hole, and the exhaust valve assembly is connected to the exhaust valve mounting hole.

[0012] Furthermore, the clutch assembly also includes a slide cover plate and a slide seat respectively disposed on the front and rear sides of the slide sleeve. The slide seat is connected to the connecting rod, the slide cover plate is connected to the slide seat, and an annular receiving groove is formed between the slide cover plate and the slide seat. The slide sleeve is rotatably fitted onto the annular receiving groove.

[0013] Furthermore, the gearbox assembly includes a housing assembly, a gearbox drive gear, and a gearbox driven gear. Both the gearbox drive gear and the gearbox driven gear are rotatably mounted inside the housing assembly. The gearbox drive gear meshes with the gearbox driven gear. The gearbox driven gear has a central hole inside. The sliding sleeve is slidably disposed in the central hole, and the sliding sleeve is connected to the central hole by a key.

[0014] Furthermore, the reducer assembly includes a main reducer housing and a reducer drive gear shaft rotatably disposed within the main reducer housing. The main reducer housing is connected to the front side of the housing assembly. The gear sleeve is fitted onto the reducer drive gear shaft, and a locking and limiting assembly for fixing the gear sleeve is provided at the rear end of the reducer drive gear shaft. The rear end of the gear sleeve extends into the central hole, and the sliding sleeve and the gear sleeve are provided with mutually cooperating engagement structures on opposite sides.

[0015] Furthermore, the axes of the sliding sleeve, gear sleeve, central hole, piston shaft, and reducer drive gear shaft are collinear.

[0016] Furthermore, the housing assembly includes a front housing and a rear housing arranged sequentially in the front-rear direction. The front housing is connected to the main reducer housing, and the rear housing is connected to the control cylinder. The two ends of the return spring abut against the rear housing and the shoulder shaft, respectively.

[0017] Furthermore, the front and rear ends of the gearbox drive gear are rotatably connected to the housing assembly via the first bearing and the second bearing, respectively; the front and rear ends of the gearbox drive gear are rotatably connected to the housing assembly via the third bearing and the fourth bearing, respectively; and the front and middle parts of the gearbox drive gear shaft are rotatably connected to the main gearbox housing via the fifth bearing and the sixth bearing, respectively.

[0018] The beneficial effects of this utility model are:

[0019] (1) By controlling the pressure build-up of the oil circuit, this utility model can input hydraulic oil into the control chamber. The hydraulic oil acts on the end face of the hydraulic drive rod, overcoming the elastic force of the return spring on the scapular shaft, and pushes the hydraulic drive rod to move. This causes the piston shaft as a whole and the sliding sleeve to move towards the gear sleeve. After the sliding sleeve and the gear sleeve are engaged, the power transmission between the two is realized. At this time, after the power input axis inputs power into the reduction gear assembly, the power can be transmitted to the reduction gear assembly through the sliding sleeve and the gear sleeve. By controlling the pressure relief of the oil circuit, the hydraulic oil in the control chamber is discharged under the action of the return spring. The elastic force of the return spring on the scapular shaft pushes the scapular shaft to move, thereby causing the piston shaft as a whole and the sliding sleeve to move away from the gear sleeve. The sliding sleeve and the gear sleeve separate, realizing the power cut-off between the two. At this time, after the power input axis inputs power into the reduction gear assembly, the power will not be transmitted to the reduction gear assembly through the sliding sleeve and the gear sleeve.

[0020] (2) This utility model uses the control cylinder body and piston shaft of the control cylinder assembly to cooperate, and the control oil circuit of the control cylinder body can be connected to the hydraulic system of the whole vehicle. It can realize that when the vehicle only has a hydraulic source, it can still control the axle clutch differential lock. There is no need to configure a compressed air source on the special vehicle. The control cylinder assembly has the advantages of simple structure, convenient control and reliable operation. Attached Figure Description

[0021] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the control cylinder body of this utility model;

[0024] Figure 3 This is a schematic diagram of the piston shaft and return spring of this utility model;

[0025] Figure 4 This is a schematic diagram of the driven gear of the gearbox of this utility model.

[0026] The following labels are used in the attached diagram: 1-Clutch assembly, 2-Reducer assembly, 3-Control cylinder assembly, 4-Reduction gearbox assembly, 5-Indicator switch assembly, 6-Exhaust valve assembly, 7-Sliding sleeve, 8-Sliding sleeve seat, 9-Sliding sleeve cover plate, 10-Nut, 11-Gear sleeve, 12-Locking limit assembly, 13-Reducer drive gear shaft, 14-Sixth bearing, 15-Fifth bearing, 16-Main reducer housing, 17-Front housing, 18-Rear housing, 19-First bolt, 20-Reduction gearbox drive gear. 21-Second bearing, 22-First bearing, 23-Reduction gearbox driven gear, 24-Third bearing, 25-Fourth bearing, 26-Control cylinder body, 27-Second bolt, 28-Piston shaft, 29-Reset spring, 30-Control chamber, 31-Control oil circuit, 32-Guide hole, 33-Switch mounting hole, 34-Exhaust valve mounting hole, 35-Connecting rod, 36-Spring mounting rod, 37-Shoulder shaft, 38-Hydraulic drive rod, 39-Guide rod, 40-Sealing structure, 41-Central hole. Detailed Implementation

[0027] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0028] like Figures 1-4 As shown, the structure of a hydraulic clutch device for a gearbox in this embodiment includes a clutch assembly 1, a reducer assembly 2, a control cylinder assembly 3, and a gearbox assembly 4;

[0029] The clutch assembly 1 includes a sliding sleeve 7 and a gear sleeve 11. The sliding sleeve 7 is drivenly connected to the reduction gearbox assembly 4, and the gear sleeve 11 is drivenly connected to the reduction gear assembly 2.

[0030] The control cylinder assembly 3 includes a control cylinder body 26 and a piston shaft 28 movably disposed within the control cylinder body 26; the control cylinder body 26 is provided with a control cavity 30 and a control oil passage 31 communicating with the control cavity 30; the piston shaft 28 includes a connecting rod 35, a spring mounting rod 36, a shoulder shaft 37, and a hydraulic drive rod 38 arranged in the front-rear direction; the connecting rod 35 is connected to the sliding sleeve 7; the spring mounting rod 36 is fitted with a return spring 29; the two ends of the return spring 29 abut against the reduction gearbox assembly 4 and the shoulder shaft 37 respectively; the hydraulic drive rod 38 is slidably disposed within the control cavity 30.

[0031] By pressurizing the control oil circuit 31, hydraulic oil can be input into the control chamber 30, so that the piston shaft 28 drives the sliding sleeve 7 to engage with the gear sleeve 11; by depressurizing the control oil circuit 31, under the action of the return spring 29, the hydraulic oil in the control chamber 30 is discharged, and the piston shaft 28 drives the sliding sleeve 7 to separate from the gear sleeve 11.

[0032] Specifically, by controlling the pressure build-up of the oil circuit 31, hydraulic oil with a pressure of not less than 3 MPa can be input into the control chamber 30. The hydraulic oil acts on the end face of the hydraulic drive rod 38, overcoming the elastic force of the return spring 29 acting on the shoulder shaft 37, and pushing the hydraulic drive rod 38 to move. This causes the piston shaft 28 as a whole and the sliding sleeve 7 to move toward the gear sleeve 11. After the sliding sleeve 7 and the gear sleeve 11 are engaged, the power transmission between the two is realized. At this time, after the power input axis inputs power to the reduction gear assembly 4, the power can be transmitted to the reduction gear assembly 2 through the sliding sleeve 7 and the gear sleeve 11. By controlling the pressure relief of the oil circuit 31, the hydraulic oil in the control chamber 30 is discharged under the action of the return spring 29. The elastic force of the return spring 29 on the shoulder shaft 37 pushes the shoulder shaft 37 to move, thereby causing the piston shaft 28 as a whole and the sliding sleeve 7 to move away from the gear sleeve 11. The sliding sleeve 7 separates from the gear sleeve 11, realizing the power cut-off between the two. At this time, after the power input axis inputs power to the reduction gear assembly 4, it will not transmit the power to the reduction gear assembly 2 through the sliding sleeve 7 and the gear sleeve 11.

[0033] By cooperating with the control cylinder body 26 and piston shaft 28 of the control cylinder assembly 3, and with the control oil circuit 31 of the control cylinder body 26 being connected to the vehicle's hydraulic system, it is possible to control the axle clutch differential lock even when the vehicle only has a hydraulic power source, without the need to configure a compressed air source on special vehicles. Furthermore, the control cylinder assembly 3 has the advantages of simple structure, convenient control, and reliable operation.

[0034] In this embodiment, the piston shaft 28 further includes a guide rod 39 connected to the hydraulic drive section, and the control cylinder 26 is also provided with a guide hole 32 communicating with the control cavity 30. The guide rod 39 is slidably engaged with the guide hole 32. The slidable engagement between the guide rod 39 and the guide hole 32 can improve the motion stability of the piston shaft 28.

[0035] In this embodiment, both the hydraulic drive rod 38 and the guide hole 32 are provided with annular grooves, and a sealing structure 40 is installed in each annular groove. The sealing structure 40 can be an O-ring or a PTFE sealing ring.

[0036] The front and rear sides of the control cavity 30 are sealed by the hydraulic drive rod 38 and the sealing structure 40 on the guide hole 32, which improves the pressure bearing capacity of the control cavity 30 and can prevent leakage or control failure due to excessive hydraulic oil pressure.

[0037] In this embodiment, the system also includes an indicator switch assembly 5 and an exhaust valve assembly 6. The control cylinder 26 is also provided with a switch mounting hole 33 that communicates with the guide hole 32 and an exhaust valve mounting hole 34 that communicates with the control oil circuit 31. The indicator switch assembly 5 is connected to the switch mounting hole 33, and the exhaust valve assembly 6 is connected to the exhaust valve mounting hole 34.

[0038] The indicator switch assembly 5 is normally closed. By detecting the displacement of the piston shaft 28, the indicator switch assembly 5 can obtain the engagement or disengagement status of the sliding sleeve 7 and the gear sleeve 11, and feed this status back to the driver's cab. The exhaust valve assembly 6 is detachable and can remove residual air from the hydraulic system.

[0039] In this embodiment, the clutch assembly 1 further includes a slide cover plate 9 and a slide seat 8 respectively disposed on the front and rear sides of the slide sleeve 7. The slide seat 8 is connected to the connecting rod 35, the slide cover plate 9 is connected to the slide seat 8, and an annular receiving groove is formed between the slide cover plate 9 and the slide seat 8. The slide sleeve 7 is rotatably fitted onto the annular receiving groove.

[0040] The width of the part of the sliding sleeve 7 that extends into the annular receiving groove is slightly smaller in the front-to-back direction than the width of the annular receiving groove in the front-to-back direction. That is, there is a gap between the sliding sleeve 7 and the annular receiving groove, so that the connection between the sliding sleeve 7 and the annular receiving groove can rotate relative to each other.

[0041] When the piston shaft 28 moves toward the gear sleeve 11, the sliding sleeve seat 8 pushes the sliding sleeve 7 to move with the piston shaft 28, so as to achieve the engagement of the sliding sleeve 7 and the gear sleeve 11. When the piston shaft 28 moves away from the gear sleeve 11, the sliding sleeve cover plate 9 pushes the sliding sleeve 7 to move with the piston shaft 28, so as to achieve the separation of the sliding sleeve 7 and the gear sleeve 11.

[0042] The sliding sleeve seat 8 is fitted onto the connecting rod 35. The connecting rod 35 has an external threaded section extending from the sliding sleeve seat 8. By fitting the washer and nut 10 onto the external threaded section and tightening the nut 10, the sliding sleeve seat 8 can be fixed onto the connecting rod 35. The sliding sleeve seat 8 is provided with threaded holes, and the sliding sleeve cover plate 9 is provided with bolt through holes corresponding to the positions of each threaded hole. By passing bolts through the bolt through holes and threadedly connecting them to the threaded holes, the sliding sleeve cover plate 9 and the sliding sleeve seat 8 are connected.

[0043] In this embodiment, the gearbox assembly 4 includes a housing assembly, a gearbox drive gear 20, and a gearbox driven gear 23. The gearbox drive gear 20 and the gearbox driven gear 23 are rotatably mounted inside the housing assembly. The gearbox drive gear 20 meshes with the gearbox driven gear 23. The gearbox driven gear 23 has a central hole 41 inside. The sliding sleeve 7 is slidably disposed in the central hole 41, and the sliding sleeve 7 is connected to the central hole 41 by a key.

[0044] The inner part of the central hole 41 is provided with a spline groove, and the outer part of the sliding sleeve 7 is provided with an external spline. The sliding sleeve 7 and the central hole 41 are connected by a spline, and the two can rotate synchronously. At the same time, the sliding sleeve 7 can slide relative to the central hole 41 and the driven gear 23 of the reduction gearbox.

[0045] The central hole 41 provides space for accommodating the sliding sleeve 7, the sliding sleeve seat 8, the sliding sleeve cover 9, the gasket, and the nut 10.

[0046] In this embodiment, the reducer assembly 2 includes a main reducer housing 16 and a reducer drive gear shaft 13 rotatably disposed within the main reducer housing 16. The main reducer housing 16 is connected to the front side of the housing assembly. The gear sleeve 11 is sleeved on the reducer drive gear shaft 13, and a locking and limiting assembly 12 for fixing the gear sleeve 11 is provided at the rear end of the reducer drive gear shaft 13. The rear end of the gear sleeve 11 extends into the central hole 41, and the sliding sleeve 7 and the gear sleeve 11 are provided with mutually cooperating engagement structures on opposite sides.

[0047] The locking and limiting assembly 12 can be a threaded sleeve and a limiting sleeve that are connected to the rear end of the reducer drive gear shaft 13.

[0048] In this embodiment, the axes of the sliding sleeve 7, the gear sleeve 11, the central hole 41, the piston shaft 28, and the reducer drive gear shaft 13 are collinear.

[0049] In this embodiment, the housing assembly includes a front housing 17 and a rear housing 18 arranged sequentially along the front-rear direction. The front housing 17 is connected to the main reducer housing 16, and the rear housing 18 is connected to the control cylinder 26. The two ends of the return spring 29 abut against the rear housing 18 and the shoulder shaft 37, respectively.

[0050] The front housing 17 and the rear housing 18 are connected by the first bolt 19, and the rear housing 18 is connected to the control cylinder 26 by the second bolt 27.

[0051] In this embodiment, the front and rear ends of the gearbox drive gear 20 are rotatably connected to the housing assembly via a first bearing 22 and a second bearing 21, respectively. The front and rear ends of the gearbox driven gear 23 are rotatably connected to the housing assembly via a third bearing 24 and a fourth bearing 25, respectively. The front and middle parts of the gearbox drive gear shaft 13 are rotatably connected to the main gearbox housing 16 via a fifth bearing 15 and a sixth bearing 14, respectively. Achieving rotatable connections via bearings is relatively simple.

[0052] In general, by controlling the pressure build-up of the oil circuit 31, hydraulic oil with a pressure of not less than 3 MPa can be input into the control chamber 30. The hydraulic oil acts on the end face of the hydraulic drive rod 38, overcoming the elastic force of the return spring 29 acting on the shoulder shaft 37, and pushing the hydraulic drive rod 38 to move. This causes the piston shaft 28 as a whole and the sliding sleeve 7 to move toward the gear sleeve 11. After the sliding sleeve 7 and the gear sleeve 11 are engaged, the power transmission between the two is realized. At this time, after the power input axis inputs power to the gearbox drive gear 20 of the gearbox assembly 4, the power is transmitted to the gearbox driven gear 23 through gear meshing, and then the power is transmitted to the gearbox drive gear shaft 13 of the gearbox assembly 2 through the sliding sleeve 7 and the gear sleeve 11.

[0053] By controlling the pressure relief of the oil circuit 31, the hydraulic oil in the control chamber 30 is discharged under the action of the return spring 29. The elastic force of the return spring 29 on the scapular shaft 37 pushes the scapular shaft 37 to move, thereby causing the piston shaft 28 as a whole and the sliding sleeve 7 to move away from the gear sleeve 11. The sliding sleeve 7 separates from the gear sleeve 11, realizing the power cut-off between the two. At this time, after the power input axis inputs power to the gearbox drive gear 20 of the gearbox assembly 4, the power is transmitted to the gearbox driven gear 23 through gear meshing. At this time, the sliding sleeve 7 and the gear sleeve 11 are separated and do not transmit power. Therefore, the power will not be transmitted to the gearbox drive gear shaft 13 of the gearbox assembly 2.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydraulic clutch device structure for a reduction gear, characterized by: This includes the clutch assembly, reducer assembly, control cylinder assembly, and gearbox assembly; The clutch assembly includes a sliding sleeve and a gear sleeve. The sliding sleeve is drivenly connected to the gearbox assembly, and the gear sleeve is drivenly connected to the reducer assembly. The control cylinder assembly includes a control cylinder body and a piston shaft movably disposed within the control cylinder body; the control cylinder body is provided with a control cavity and a control oil passage communicating with the control cavity; the piston shaft includes a connecting rod, a spring mounting rod, a shoulder shaft, and a hydraulic drive rod arranged in a front-rear direction; the connecting rod is connected to the sliding sleeve; the spring mounting rod is fitted with a return spring; the two ends of the return spring respectively abut against the gearbox assembly and the shoulder shaft; the hydraulic drive rod is slidably disposed within the control cavity. By pressurizing the control oil circuit, hydraulic oil can be input into the control chamber, so that the piston shaft drives the sliding sleeve to engage with the gear sleeve; Pressure is released through the control oil circuit, and under the action of the return spring, the hydraulic oil in the control chamber is discharged, and the piston shaft drives the sliding sleeve to separate from the gear sleeve.

2. The hydraulic clutch device structure for a reduction gear according to claim 1, characterized in that: The piston shaft also includes a guide rod connected to the hydraulic drive section, and the control cylinder body is also provided with a guide hole communicating with the control cavity, and the guide rod is slidably engaged with the guide hole.

3. The hydraulic clutch arrangement for a reduction gearbox according to claim 2, characterized in that: Both the hydraulic drive rod and the guide hole are provided with annular grooves, and sealing structures are installed in the annular grooves.

4. The hydraulic clutch device structure for a reduction gear according to claim 2, characterized in that: It also includes an indicator switch assembly and an exhaust valve assembly. The control cylinder body is further provided with a switch mounting hole communicating with the guide hole and an exhaust valve mounting hole communicating with the control oil circuit. The indicator switch assembly is connected to the switch mounting hole, and the exhaust valve assembly is connected to the exhaust valve mounting hole.

5. The hydraulic clutch device structure for a reduction gear according to claim 1, characterized in that: The clutch assembly further includes a slide cover plate and a slide seat respectively disposed on the front and rear sides of the slide sleeve. The slide seat is connected to the connecting rod, the slide cover plate is connected to the slide seat, and an annular receiving groove is formed between the slide cover plate and the slide seat. The slide sleeve is rotatably fitted onto the annular receiving groove.

6. The hydraulic clutch device structure for a reduction gear according to claim 1, characterized by: The gearbox assembly includes a housing assembly, a gearbox drive gear, and a gearbox driven gear. Both the gearbox drive gear and the gearbox driven gear are rotatably mounted inside the housing assembly. The gearbox drive gear meshes with the gearbox driven gear. The gearbox driven gear has a central hole inside. The sliding sleeve is slidably disposed in the central hole, and the sliding sleeve is connected to the central hole by a key.

7. The hydraulic clutch arrangement for a reduction gearbox according to claim 6, characterized in that: The reducer assembly includes a main reducer housing and a reducer drive gear shaft rotatably disposed within the main reducer housing. The main reducer housing is connected to the front side of the housing assembly. The gear sleeve is fitted onto the reducer drive gear shaft, and a locking and limiting assembly for fixing the gear sleeve is provided at the rear end of the reducer drive gear shaft. The rear end of the gear sleeve extends into the central hole, and the sliding sleeve and the gear sleeve are provided with mutually cooperating engagement structures on opposite sides.

8. The hydraulic clutch arrangement for a reduction gearbox according to claim 7, characterized in that: The axes of the sliding sleeve, gear sleeve, central hole, piston shaft, and reducer drive gear shaft are collinear.

9. The structure of the hydraulic clutch device for a gearbox according to claim 7, characterized in that: The housing assembly includes a front housing and a rear housing arranged sequentially in a front-rear direction. The front housing is connected to the main reducer housing, and the rear housing is connected to the control cylinder. The two ends of the return spring abut against the rear housing and the shoulder shaft, respectively.

10. The hydraulic clutch arrangement for a reduction gearbox according to claim 7, characterized in that: The front and rear ends of the gearbox drive gear are rotatably connected to the housing assembly via the first and second bearings, respectively. The front and rear ends of the gearbox drive gear are rotatably connected to the housing assembly via the third and fourth bearings, respectively. The front and middle parts of the gearbox drive gear shaft are rotatably connected to the main gearbox housing via the fifth and sixth bearings, respectively.

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