Coaxial hydraulic clutch

Abstract

The coaxial hydraulic clutch comprises a main shaft, a cylinder sleeve, a gear ring, a first piston, a second piston, a first driving hub, a second driving hub and a third driving hub, the main shaft is fixedly connected with the cylinder sleeve, the cylinder sleeve is further meshed with one end of the gear ring, the other end of the gear ring is meshed with the first driving hub, one end of the first piston is arranged between the cylinder sleeve and the main shaft in a sleeved mode, and the other end of the second piston is arranged between the cylinder sleeve and the third driving hub. The second piston is arranged between the first piston and the cylinder sleeve in a sleeved mode, a first oil cavity is defined by gaps among the first piston, the cylinder sleeve and the main shaft, a second oil cavity is defined by gaps among the first piston, the second piston and the main shaft, a middle through hole is formed in the main shaft, and a first oil inlet hole is formed between the first oil cavity and the middle through hole. And a second oil inlet hole is formed between the second oil cavity and the middle through hole. By the adoption of the technical scheme, the overall dimension and the size of the clutch are greatly reduced, the clutch can be applied to a narrow space of a small vehicle, the structure is simple, the number of parts is reduced, and the manufacturing cost of the clutch is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of clutches, in particular to a coaxial hydraulic clutch. Background Art

[0002] The clutch is located in the flywheel housing between the engine and the gearbox. During the driving process of the car, the driver can step on or release the clutch pedal as needed to temporarily separate and gradually engage the engine and the gearbox to cut off or transfer the power input from the engine to the transmission. Therefore, the clutch is a common component used to change the mechanical transmission path. The existing clutches are mainly divided into two types: tooth type and friction type.

[0003] For example, the patent document with publication number "CN205534101U" discloses a hydraulic torque converter with a friction plate clutch, including a movement mounting housing, the driven shaft of the movement passing through the movement mounting housing; and also including a housing mounted on the movement mounting housing, the housing covering the driven shaft of the movement, a resisting friction plate clutch package and a high-speed friction plate clutch package are provided between the housing and the movement mounting housing, the low-speed friction plate clutch package is installed at one end of the driven shaft of the movement passing through the movement mounting housing, a power output shaft is also rotatably installed between the housing and the movement mounting housing, and a high-speed friction plate clutch is installed on the power output shaft. The package, the friction plate clutch package and the high-speed friction plate clutch package cooperate with each other; the patented technology adopts a single-turbine three-element torque converter and a friction clutch. However, the existing clutch is usually a multi-axis structure, generally including an input shaft and multiple output shafts. When the mechanical transmission path needs to be changed, the power of the input shaft is switched and engaged between multiple output shafts through a series of mechanical transmission components. The clutch structure of this type of multi-axis structure is relatively complex, the outer dimensions are large, and it occupies a large assembly space. In some small vehicles, the internal space of the vehicle is small and cramped, and the outer dimensions of the clutch need to be reduced as much as possible. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a coaxial hydraulic clutch.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a coaxial hydraulic clutch, comprising a main shaft, a cylinder sleeve, a gear ring, a first piston, a second piston, a first friction plate group, a second friction plate group, a first drive hub, a second drive hub and a third drive hub, wherein the third drive hub is supported on the main shaft by a rolling bearing, the second drive hub is supported on the third drive hub by a rolling bearing, the first drive hub is supported on the second drive hub by a rolling bearing, the main shaft is fixedly connected to the cylinder sleeve, the cylinder sleeve is also meshed with one end of the gear ring, the other end of the gear ring is meshed with the first drive hub, the first friction plate group is meshed between the gear ring and the second drive hub, the second friction plate group is meshed with the main shaft and the third drive hub, one end of the first piston is sleeved between the cylinder sleeve and the main shaft, the other end of the first piston and the first drive hub are arranged on the left and right sides of the first friction plate group, the second piston is sleeved between the first piston and the cylinder sleeve, and the second piston and the third drive hub are arranged on the left and right sides of the second friction plate group, the gap between the first piston, the cylinder sleeve and the main shaft forms a first oil chamber, the gap between the first piston, the second piston and the main shaft forms a second oil chamber, a middle through hole is provided in the main shaft, a first oil inlet hole is provided between the first oil chamber and the middle through hole, and a second oil inlet hole is provided between the second oil chamber and the middle through hole.

[0007] The rolling bearing is a thrust ball bearing.

[0008] A slot is provided on the surface of the first piston, and a guide plate, a first spring and a front baffle are also provided between the cylinder sleeve and the first friction plate group. One end of the guide plate is clamped between the cylinder sleeve and one end of the first spring, and the other end of the guide plate is fitted into the slot. The other end of the first spring is fixedly connected to one side of the front baffle, and the other side of the front baffle is in contact with the surface of the first friction plate group.

[0009] The coaxial hydraulic clutch also includes a third piston and a second spring. The third piston is connected to the main shaft via a spline, and the third piston is also sleeved between the main shaft and the first piston. The second spring is clamped between the third piston and the second piston.

[0010] The coaxial hydraulic clutch also includes a first sealing ring, which is arranged between the first piston and the cylinder sleeve.

[0011] The coaxial hydraulic clutch also includes a second sealing ring, which is respectively arranged between the third piston and the first piston, between the second piston and the first piston, between the first piston and the main shaft, and between the second piston and the main shaft.

[0012] The coaxial hydraulic clutch also includes a first rotating shaft, a second rotating shaft, a driving gear and a driven gear. The driven gear is connected to the cylinder sleeve via a spline, the driving gear and the driven gear are meshed with each other, the driving gear is also connected to one end of the first rotating shaft via a flat key, the other end of the first rotating shaft is fixedly connected to the first bevel gear, the first bevel gear and the second bevel gear are meshed with each other, and the second bevel gear is fixedly connected to the second rotating shaft.

[0013] A rear baffle is also provided between the first friction plate group and the first driving hub, and the rear baffle is also connected to the second driving hub via a spline.

[0014] A partition is also provided between the second friction plate group and the third driving hub, and the partition is connected to the main shaft via a spline.

[0015] A third oil inlet hole is also provided on the surface of the main shaft, one end of the third oil inlet hole is communicated with the central through hole, and the other end of the third oil inlet hole is aligned with the second friction plate group.

[0016] The beneficial effects of the present invention are as follows: by adopting the technical solution of the present invention, a plurality of pistons and a plurality of drive hubs are connected in series on the same main shaft, and a cylinder is formed around the gap between two adjacent pistons. When hydraulic oil is fed into the cylinder, power is transmitted to the corresponding drive hub via the piston. Different pistons are combined with different drive hubs to form different transmission paths. When hydraulic oil is fed into different cylinders, switching between mechanical transmission paths is achieved. Compared with the existing multi-axis clutch structure, the present invention greatly reduces the external dimensions and volume of the clutch itself because a plurality of pistons and a plurality of drive hubs are connected in series on the same main shaft, so that the present invention can be applied to the narrow space of a small vehicle, and has a simple structure, reduces the number of parts, and reduces the manufacturing cost of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the present invention;

[0018] Figure 2 It is the transmission principle diagram of the present invention.

[0019] In the figure: 1-main shaft, 2-cylinder sleeve, 3-gear ring, 4-first piston, 5-second piston, 6-first friction plate group, 7-second friction plate group, 8-first drive hub, 9-second drive hub, 10-third drive hub, 11-rolling bearing, 12-first oil chamber, 13-second oil chamber, 14-middle through hole, 15-first oil inlet hole, 16-second oil inlet hole, 17-slot, 18-guide plate, 19-first spring, 20-front baffle, 21-third piston, 22-second spring, 23-first sealing ring, 24-second sealing ring, 25-first rotating shaft, 26-second rotating shaft, 27-driving gear, 28-driven gear, 29-first bevel gear, 30-second bevel gear, 31-rear baffle, 32-partition plate, 33-third oil inlet hole. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0021] like Figure 1 and Figure 2 As shown, the present invention provides a coaxial hydraulic clutch, comprising a main shaft 1, a cylinder sleeve 2, a gear ring 3, a first piston 4, a second piston 5, a first friction plate group 6, a second friction plate group 7, a first drive hub 8, a second drive hub 9 and a third drive hub 10, the third drive hub 10 is supported on the main shaft 1 by a rolling bearing 11, the second drive hub 9 is supported on the third drive hub 10 by a rolling bearing 11, the first drive hub 8 is supported on the second drive hub 9 by a rolling bearing 11, the main shaft 1 is fixedly connected to the cylinder sleeve 2, the cylinder sleeve 2 is also meshed with one end of the gear ring 3, the other end of the gear ring 3 is meshed with the first drive hub 8, the first friction plate group 6 is meshed between the gear ring 3 and the second drive hub 9, the second friction plate group 7 is meshed on the main shaft 1 Between the first piston 4 and the third drive hub 10, one end of the first piston 4 is sleeved between the cylinder sleeve 2 and the main shaft 1, and the other end of the first piston 4 and the first drive hub 8 are arranged on the left and right sides of the first friction plate group 6, the second piston 5 is sleeved between the first piston 4 and the cylinder sleeve 2, and the second piston 5 and the third drive hub 10 are arranged on the left and right sides of the second friction plate group 7, the gap between the first piston 4, the cylinder sleeve 2 and the main shaft 1 forms a first oil chamber 12, the gap between the first piston 4, the second piston 5 and the main shaft 1 forms a second oil chamber 13, a middle through hole 14 is provided in the main shaft 1, a first oil inlet hole 15 is provided between the first oil chamber 12 and the middle through hole 14, and a second oil inlet hole 16 is provided between the second oil chamber 13 and the middle through hole 14.

[0022] By adopting the technical solution of the present invention, multiple pistons and multiple drive hubs are connected in series on the same main shaft, and the gap between two adjacent pistons forms an oil cylinder. When hydraulic oil is sent into the oil cylinder, power is transmitted to the corresponding drive hub via the piston. Different pistons are combined with different drive hubs to form different transmission paths. When hydraulic oil is sent into different oil cylinders, switching between mechanical transmission paths is achieved. Compared with the existing multi-axis clutch structure, the present invention greatly reduces the external size and volume of the clutch itself because multiple pistons and multiple drive hubs are connected in series on the same main shaft, so that the present invention can be applied to the narrow space of small vehicles, and the structure is simple, the number of parts is reduced, and the manufacturing cost of the clutch is reduced.

[0023] Specifically, the rolling bearing 11 is a thrust ball bearing. A slot 17 is provided on the surface of the first piston 4. A guide plate 18, a first spring 19 and a front baffle plate 20 are also provided between the cylinder sleeve 2 and the first friction plate group 6. One end of the guide plate 18 is clamped between the cylinder sleeve 2 and one end of the first spring 19, and the other end of the guide plate 18 is sleeved in the slot 17. The other end of the first spring 19 is fixedly connected to one side of the front baffle plate 20, and the other side of the front baffle plate 20 is abutted against the surface of the first friction plate group 6. The coaxial hydraulic clutch also includes a third piston 21 and a second spring 22. The third piston 21 is connected to the main shaft 1 through a spline, and the third piston 21 is also sleeved between the main shaft 1 and the first piston 4. The second spring 22 is clamped between the third piston 21 and the second piston 5. By adopting the technical solution of the present invention, the first friction plate group 6 and the second friction plate group 7 are mainly used to transmit the power on the piston to the corresponding drive hub. The first friction plate group 6 and the second friction plate group 7 themselves have high rigidity, so they can achieve rigid switching between power transmission paths, which helps to achieve smooth switching of power transmission paths.

[0024] In addition, the coaxial hydraulic clutch further includes a first sealing ring 23, which is disposed between the first piston 4 and the cylinder sleeve 2. The coaxial hydraulic clutch further includes a second sealing ring 24, which is disposed between the third piston 21 and the first piston 4, between the second piston 5 and the first piston 4, between the first piston 4 and the main shaft 1, and between the second piston 5 and the main shaft 1.

[0025] In addition, the coaxial hydraulic clutch also includes a first rotating shaft 25, a second rotating shaft 26, a driving gear 27 and a driven gear 28. The driven gear 28 is connected to the cylinder sleeve 2 through a spline, the driving gear 27 and the driven gear 28 are meshed with each other, the driving gear 27 is also connected to one end of the first rotating shaft 25 through a flat key, the other end of the first rotating shaft 25 is fixedly connected to the first bevel gear 29, the first bevel gear 29 and the second bevel gear 30 are meshed with each other, and the second bevel gear 30 is fixedly connected to the second rotating shaft 26. Specifically, a rear baffle 31 is also provided between the first friction plate group 6 and the first drive hub 8, and the rear baffle 31 is also connected to the second drive hub 9 through a spline. A partition 32 is also provided between the second friction plate group 7 and the third drive hub 10, and the partition 32 is also connected to the main shaft 1 through a spline.

[0026] Furthermore, a third oil inlet hole 33 is provided on the surface of the main shaft 1, one end of the third oil inlet hole 33 is connected to the middle through hole 14, and the other end of the third oil inlet hole 33 is aligned with the second friction plate group 7. Thus, lubricating oil is fed into the third oil inlet hole 33 to lubricate the main transmission parts in the clutch, thereby extending the service life of the clutch.

[0027] Specifically, the present invention has four power transmission paths:

[0028] The first power transmission path: no hydraulic oil is injected into the first oil chamber 12 and the second oil chamber 13, the first piston 4, the second piston 5 and the third piston 21 will not move along the main shaft axis, and the power from the second rotating shaft 26 is transmitted to the first driving hub 8 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, and the ring gear 3 in sequence, and the first driving hub 8 outputs the power.

[0029] The second power transmission path: hydraulic oil is injected into the first oil chamber 12, and no hydraulic oil is injected into the second oil chamber 13. The first piston 4 moves rightward along the main shaft axis as shown in the figure. At this time, a part of the power from the second rotating shaft 26 is transmitted to the first driving hub 8 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, and the ring gear 3 in sequence, and the first driving hub 8 outputs part of the power; the other part of the power is transmitted to the second driving hub 9 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, the main shaft 1, the first piston 4, and the first friction plate group 6 in sequence, and the second driving hub 9 outputs part of the power. At this time, the first driving hub 8 and the second driving hub 9 output at the same time.

[0030] The third power transmission path: no hydraulic oil is injected into the first oil chamber 12, while hydraulic oil is injected into the second oil chamber 13. The second piston 5 moves rightward along the main shaft axis as shown in the figure. At this time, part of the power from the second rotating shaft 26 is transmitted to the first driving hub 8 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, and the ring gear 3 in sequence, and part of the power is output by the first driving hub 8; the other part of the power is transmitted to the third driving hub 10 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, the main shaft 1, the second piston 5, and the second friction plate group 7 in sequence, and part of the power is output by the third driving hub 10. At this time, the first driving hub 8 and the third driving hub 10 output at the same time.

[0031] Fourth power transmission path: Hydraulic oil is injected into the first oil chamber 12 and the second oil chamber 13, and the first piston 4 and the second piston 5 move rightward along the main shaft axis as shown in the figure. At this time, part of the power from the second rotating shaft 26 is transmitted to the first driving hub 8 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, and the ring gear 3 in sequence, and part of the power is output by the first driving hub 8; the other part of the power is transmitted to the first rotating shaft 26 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the main shaft 25, the driving gear 27, the driven gear 28, and the ring gear 3 in sequence. The driving gear 27, the driven gear 28, the main shaft 1, the first piston 4, and the first friction plate group 6 are transmitted to the second drive hub 9, and part of the power is output by the second drive hub 9; another part of the power is transmitted to the third drive hub 10 via the second bevel gear 30, the first bevel gear 29, the first rotating shaft 25, the driving gear 27, the driven gear 28, the main shaft 1, the second piston 5, and the second friction plate group 7 in sequence, and part of the power is output by the third drive hub 10. At this time, the first drive hub 8, the second drive hub 9 and the third drive hub 10 output at the same time.

Claims

1. A coaxial hydraulic clutch, comprising a main shaft (1), a cylinder sleeve (2), a gear ring (3), a first piston (4), a second piston (5), a first friction plate group (6), a second friction plate group (7), a first drive hub (8), a second drive hub (9) and a third drive hub (10), wherein the third drive hub (10) is supported on the main shaft (1) by a rolling bearing (11), the second drive hub (9) is supported on the third drive hub (10) by a rolling bearing (11), the first drive hub (8) is supported on the second drive hub (9) by a rolling bearing (11), the main shaft (1) is fixedly connected to the cylinder sleeve (2), the cylinder sleeve (2) is also meshed with one end of the gear ring (3), the other end of the gear ring (3) is meshed with the first drive hub (8), the first friction plate group (6) is meshed between the gear ring (3) and the second drive hub (9), the second friction plate group (7) is meshed between the main shaft (1) and the third drive hub (9), and the third drive hub (10) is supported on the third drive hub (10) by a rolling bearing (11). The invention relates to a first piston (4) and a second piston (5) for rotating a main shaft (1). The first piston (4) and the second piston (5) are connected to the third drive hub (10). One end of the first piston (4) is sleeved between the cylinder sleeve (2) and the main shaft (1). The other end of the first piston (4) and the first drive hub (8) are arranged on the left and right sides of the first friction plate group (6). The second piston (5) is sleeved between the first piston (4) and the cylinder sleeve (2). The second piston (5) and the third drive hub (10) are arranged on the left and right sides of the second friction plate group (7). The gap between the first piston (4), the cylinder sleeve (2) and the main shaft (1) forms a first oil chamber (12). The gap between the first piston (4), the second piston (5) and the main shaft (1) forms a second oil chamber (13). A central through hole (14) is provided in the main shaft (1). A first oil inlet hole (15) is provided between the first oil chamber (12) and the central through hole (14). A second oil inlet hole (16) is provided between the second oil chamber (13) and the central through hole (14).

2. The coaxial hydraulic clutch according to claim 1, characterized in that: The rolling bearing (11) is a thrust ball bearing.

3. The coaxial hydraulic clutch according to claim 1, characterized in that: A groove (17) is provided on the surface of the first piston (4); a guide plate (18), a first spring (19) and a front baffle plate (20) are also provided between the cylinder sleeve (2) and the first friction plate group (6); one end of the guide plate (18) is clamped between the cylinder sleeve (2) and one end of the first spring (19); the other end of the guide plate (18) is sleeved in the groove (17); the other end of the first spring (19) is fixedly connected to one side of the front baffle plate (20); and the other side of the front baffle plate (20) is in contact with the surface of the first friction plate group (6).

4. The coaxial hydraulic clutch according to claim 1, characterized in that: The coaxial hydraulic clutch also includes a third piston (21) and a second spring (22). The third piston (21) is connected to the main shaft (1) via a spline, and the third piston (21) is also sleeved between the main shaft (1) and the first piston (4). The second spring (22) is clamped between the third piston (21) and the second piston (5).

5. The coaxial hydraulic clutch according to claim 3, characterized in that: The coaxial hydraulic clutch also includes a first sealing ring (23), which is arranged between the first piston (4) and the cylinder sleeve (2).

6. The coaxial hydraulic clutch according to claim 4, characterized in that: The coaxial hydraulic clutch further comprises a second sealing ring (24), which is respectively arranged between the third piston (21) and the first piston (4), between the second piston (5) and the first piston (4), between the first piston (4) and the main shaft (1), and between the second piston (5) and the main shaft (1).

7. The coaxial hydraulic clutch according to claim 1, characterized in that: The coaxial hydraulic clutch further comprises a first rotating shaft (25), a second rotating shaft (26), a driving gear (27) and a driven gear (28); the driven gear (28) is connected to the cylinder sleeve (2) via a spline; the driving gear (27) and the driven gear (28) are meshed with each other; the driving gear (27) is further connected to one end of the first rotating shaft (25) via a flat key; the other end of the first rotating shaft (25) is fixedly connected to a first bevel gear (29); the first bevel gear (29) and the second bevel gear (30) are meshed with each other; and the second bevel gear (30) is fixedly connected to the second rotating shaft (26).

8. The coaxial hydraulic clutch according to claim 1, characterized in that: A rear baffle (31) is also provided between the first friction plate group (6) and the first drive hub (8), and the rear baffle (31) and the second drive hub (9) are also connected via a spline.

9. The coaxial hydraulic clutch according to claim 1, characterized in that: A partition plate (32) is also provided between the second friction plate group (7) and the third drive hub (10), and the partition plate (32) and the main shaft (1) are also connected via a spline.

10. The coaxial hydraulic clutch according to claim 1, characterized in that: A third oil inlet hole (33) is also provided on the surface of the main shaft (1), one end of the third oil inlet hole (33) is connected to the central through hole (14), and the other end of the third oil inlet hole (33) is aligned with the second friction plate group (7).

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