Series wet dual clutch

Abstract

The present invention discloses a series wet dual clutch, comprising a radially arranged outer wet clutch unit and an inner wet clutch unit, and a housing unit, wherein the outer wet clutch unit and the inner wet clutch unit are respectively connected in series to the front and rear ends of a driving motor, and the order of power transmission is the engine, the outer wet clutch unit, the driving motor, the inner wet clutch unit, and the gearbox, wherein the outer wet clutch unit is used to connect and interrupt the power transmission between the driving motor and the engine, and the inner wet clutch unit is used to connect and interrupt the power transmission between the driving motor and the gearbox. The present invention has the advantages of having only one power input and one power output, and a structure in which two wet clutches work in series is designed, and the structure space is compact, and it is matched in a P1 / P2 hybrid power system.

Description

Technical Field

[0001] The invention relates to the technical field of wet double clutches, in particular to a wet double clutch in which two clutches are connected in series. Background Art

[0002] The dual clutch is mainly used in dual clutch transmission, which is different from the general automatic transmission system. It is based on the manual transmission but is an automatic transmission. In addition to the flexibility of the manual transmission and the comfort of the automatic transmission, it can also provide uninterrupted power output.

[0003] The currently disclosed dual-clutch structures are mainly structures with two clutches in parallel, and the two clutches are responsible for the transmission and interruption of the gear power of the odd and even gears of the gearbox, that is, the dual clutch has one power input and two power outputs. In the powertrain of the hybrid system, the dual clutch needs to work in series, that is, the dual clutch has only one power input and one power output. The existing parallel dual clutch structure cannot meet this requirement, which is the focus of this application. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a series wet double clutch having only one power input and one power output.

[0005] In order to solve the above technical problems, the present invention provides a series wet dual clutch, including a radially arranged outer wet clutch unit and an inner wet clutch unit, and a housing unit. The outer wet clutch unit and the inner wet clutch unit are respectively connected in series to the front and rear ends of the drive motor, and the order of power transmission is engine, outer wet clutch unit, drive motor, inner wet clutch unit, and gearbox. The outer wet clutch unit connects and interrupts the power transmission between the drive motor and the engine, and the inner wet clutch unit connects and interrupts the power transmission between the drive motor and the gearbox.

[0006] The external wet clutch unit comprises an input spline sleeve and its input spline teeth, an external friction plate, an external dual plate, an external pressure plate, an external diaphragm spring, and a return spring. The external friction plate and the external dual plate are arranged at intervals and have gaps between them. The input spline sleeve transmits the power of the engine to the external wet clutch unit through the input spline teeth, introduces the first engine power into the series wet dual clutch, and transmits the power to the external friction plate through the input spline teeth of the external wet clutch. The external diaphragm spring drives the external pressure plate to move axially, gradually compresses the gap between the external friction plate and the external dual plate until they are fully fitted, and the external wet clutch unit is combined to transmit the engine torque.

[0007] The external wet clutch unit also includes a limit plate, a shaft seal, a needle bearing, and an external support ring. The shaft seal and the needle bearing are installed at the sealing hole. The limit plate is axially arranged on one side of the external dual plate, and the external pressure plate is axially arranged on the other side. The outer circle of the external diaphragm spring is constrained by the external support ring to form an external fulcrum of the external diaphragm. The external pressure plate passes through the through hole of the external pressure plate so that one side of the external diaphragm spring is fitted with the fulcrum of the external pressure plate. The external pressure plate positioning column passes through the external diaphragm positioning hole. When the external support circle arranged on the external diaphragm spring is axially moved by the thrust of the external release bearing, the external diaphragm spring contacts with the fulcrum of the external pressure plate, thereby driving the external pressure plate to move axially.

[0008] The return spring is circumferentially arranged in the return spring hole, the force on the external release bearing is unloaded, the elastic force of the return spring acts on the return angle of the external pressure plate, the external pressure plate is reset, a gap is generated between the external friction plate and the external dual plate, and the external wet clutch unit is disconnected.

[0009] The housing unit comprises a housing and external spline teeth of the housing. The external spline teeth of the housing receive power from the external wet clutch unit and further transmit the power to the internal wet clutch unit through the internal spline teeth of the housing.

[0010] The housing unit also includes bolts, a support plate, a sealed bearing, a housing, an external retaining spring, a gasket, and an internal retaining spring. The housing is connected to the support plate by bolts, and the bolts are fastened through bolt holes and threaded holes; the sealed bearing is installed at the bearing hole of the support plate, and the inner hole of the sealed bearing is interference fit with the bearing sealing step; the external retaining spring is installed in the retaining spring groove outside the housing to ensure the axial position of the outer support ring; the internal retaining spring is installed in the retaining spring groove inside the housing to ensure the axial position of the inner support ring; the gasket is installed between the gasket support step and the output spline sleeve to ensure the relative rotation of the two; the motor rotor frame is connected to the drive motor rotor to introduce the power of the second power drive motor.

[0011] The support plate is sealed with the gearbox housing through the gearbox sealing step, and the shaft seal is installed at the sealing hole of the input spline sleeve, which ensures the overall sealing of the tandem wet dual clutch and enables the wet dual clutch to operate in the gearbox oil.

[0012] The internal wet clutch unit includes an output spline sleeve and its output spline teeth, an inner friction plate, an inner pair of plates, an inner diaphragm spring, an inner pressure plate, an inner support ring, and a return wave spring. The internal wet clutch unit transmits power to the inner pair of plates through the spline teeth inside the housing. The inner pair of plates and the inner friction plates are arranged at intervals and have gaps between them. The inner diaphragm spring drives the inner pressure plate to move axially, gradually compressing the gaps between the inner friction plates and the inner pair of plates until they are fully fitted. The internal wet clutch unit is combined to transmit torque.

[0013] The housing friction surface is axially arranged on one side of the outer friction plate, and the inner pressure plate is axially arranged on the other side. The outer circle of the inner diaphragm spring is constrained by the inner supporting ring to form an outer fulcrum of the inner diaphragm, and one side of the inner diaphragm spring is in contact with the fulcrum of the inner pressure plate, and the inner pressure plate positioning column passes through the inner diaphragm positioning hole. When the inner supporting circle arranged on the inner diaphragm spring is axially moved by the thrust of the inner release bearing, the inner diaphragm spring drives the inner pressure plate to move axially by contacting with the fulcrum of the inner pressure plate.

[0014] The inner friction plate transmits the torque to the output spline sleeve through the output spline teeth of the inner wet clutch, and the output spline sleeve transmits the torque to the gearbox shaft through the meshing of the output spline teeth with the spline teeth of the gearbox shaft.

[0015] The needle bearing surface at the top end of the gearbox shaft cooperates with the needle bearing to make the gearbox shaft coaxial with the wet dual clutch.

[0016] The return wave spring is installed on the step surface of the housing, the force on the inner release bearing is unloaded, the return wave spring acts on the return surface of the inner pressure plate through elastic force, the inner pressure plate is reset, a gap is generated between the inner friction plate and the inner dual plate, and the inner wet clutch unit is disconnected.

[0017] The superior effects of the present invention are: there is only one power input and one power output; based on the space of a traditional dual clutch, an innovative design of a structure in which two wet clutches work in series has a compact structure and space, which is matched with a P1 / P2 hybrid power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 It is a schematic diagram of an assembly of an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Middle AA section;

[0021] Figure 3 for Figure 1 Middle BB section;

[0022] Description of the symbols in the figure

[0023] 1 – bolt;

[0024] 2-support plate;

[0025] 201 - bearing hole of support plate; 202 - gearbox sealing step;

[0026] 203 - bolt hole;

[0027] 3-Limiting plate;

[0028] 4-Input spline sleeve;

[0029] 401 - input spline teeth; 402 - external clutch input spline teeth;

[0030] 403 - sealing hole; 404 - shaft sleeve sealing step;

[0031] 5-sealed bearing; 6-shaft seal;

[0032] 7-needle bearing; 8-internal friction plate;

[0033] 9 - inner pair of plates; 10 - outer friction plates;

[0034] 11 - external dual piece;

[0035] 12 - housing;

[0036] 1201-threaded hole; 1202-motor rotor frame;

[0037] 1203-External spline teeth of the housing; 1204-External retaining ring groove;

[0038] 1205-through hole of outer pressure plate; 1206-spline teeth inside the housing;

[0039] 1207 - shell step surface; 1208 - gasket support step;

[0040] 1209 - internal retaining spring groove; 1210 - return spring hole;

[0041] 1211-shell friction surface;

[0042] 13-external retaining ring; 14-external support ring;

[0043] 15 - external pressure plate;

[0044] 1501-positioning column of external pressure plate; 1502-return angle of external pressure plate;

[0045] 1503—External pressure plate fulcrum;

[0046] 16 - outer diaphragm spring;

[0047] 1601 - external diaphragm positioning hole; 1602 - external support circle;

[0048] 17 - gasket;

[0049] 18 - output spline sleeve;

[0050] 1801-inner clutch output spline teeth; 1802-output spline teeth;

[0051] 19 - gearbox shaft;

[0052] 1901-needle bearing surface; 1902-gearbox shaft spline teeth;

[0053] 20 - inner diaphragm spring;

[0054] 2001-Inner diaphragm positioning hole; 2002-Inner support circle;

[0055] 21 - internal pressure plate;

[0056] 2101-Internal pressure plate positioning column; 2102-Internal pressure plate return surface;

[0057] 2103—Inner pressure plate fulcrum;

[0058] 22-inner support ring; 23-inner retaining spring;

[0059] 24-return wave spring; 25-return spring. DETAILED DESCRIPTION

[0060] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0061] Figure 1 The schematic diagram of the assembly of the embodiment of the present invention is shown. Figure 2 The AA cross-sectional view of the assembly of the embodiment of the present invention is shown. Figure 3 FIG. 2 shows a cross-sectional view of the assembly BB of an embodiment of the present invention. Figure 1-Figure 3 As shown, the present invention provides a series wet dual clutch, comprising a radially arranged outer wet clutch unit and an inner wet clutch unit, and a housing unit, wherein:

[0062] The housing unit includes a bolt 1, a support plate 2, a sealed bearing 5, a housing 12, an outer retaining spring 13, a gasket 17, and an inner retaining spring 23;

[0063] The external wet clutch unit comprises a limit plate 3, an input spline sleeve 4, a shaft seal 6, a needle bearing 7, an external friction plate 10, an external dual plate 11, an external support ring 14, an external pressure plate 15, an external diaphragm spring 16, and a return spring 25;

[0064] The internal wet clutch unit comprises an internal friction plate 8, an internal dual plate 9, an output spline sleeve 18, an internal diaphragm spring 20, an internal pressure plate 21, an internal support ring 22, and a return wave spring 24;

[0065] The input spline sleeve 4 transmits the power of the engine to the external wet clutch unit through the input spline teeth 401, introduces the power of the first power engine into the wet dual clutch, and transmits the power to the external friction plate 10 through the external clutch input spline teeth 402. The shaft seal 6 and the needle bearing 7 are installed at the sealing hole 403. The external friction plate 10 and the external dual plate 11 are arranged at intervals and a certain gap is ensured between them. The axial limit plate 3 is arranged on one side of the external dual plate 11, and the external pressure plate 15 is arranged on the other side. The outer circumference of the external diaphragm spring 16 is constrained by the external support ring 14 to form an external diaphragm. The outer diaphragm spring 16 is fitted with the outer diaphragm fulcrum 1503 through the outer diaphragm through hole 1205, and the outer diaphragm positioning column 1501 passes through the outer diaphragm positioning hole 1601. When the outer supporting circle 1602 arranged on the outer diaphragm spring 16 is axially moved by the thrust of the outer release bearing, the outer diaphragm spring 16 contacts the outer diaphragm fulcrum 1503, drives the outer pressure plate 15 to move axially, and gradually compresses the gap between the outer friction plate 10 and the outer dual plate 11 until they are completely fitted. At this time, the outer clutch unit is combined to transmit the engine torque. When the outer clutch unit is to be disconnected, the force on the outer release bearing is unloaded, and the return spring 25 circumferentially arranged in the return spring hole 1210 acts on the outer pressure plate return angle 1502 through elastic force, and the outer pressure plate 15 is reset, and a certain gap is generated between the outer friction plate 10 and the outer dual plate 11 and the power is disconnected.

[0066] The housing unit receives power from the external wet clutch unit through the housing external spline teeth 1203 arranged on the housing 12, and further transmits the power to the internal wet clutch unit through the housing internal spline teeth 1206.

[0067] The inner wet clutch unit transmits power to the inner dual plate 9 through the spline teeth 1206 in the housing. The inner friction plate 8 and the inner dual plate 9 are arranged at intervals and a certain gap is ensured between them. The inner friction plate 8 on one side is axially arranged with the housing friction surface 1211, and the inner pressure plate 21 is axially arranged on the other side. The outer circle of the inner diaphragm spring 20 is constrained by the inner supporting ring 22 to form an outer fulcrum of the inner diaphragm. One side of the inner diaphragm spring 20 is in contact with the inner pressure plate fulcrum 2103, and the inner pressure plate positioning column 2101 passes through the inner diaphragm positioning hole 2001. When the inner supporting circle 2002 arranged on the inner diaphragm spring 20 is axially moved by the thrust of the inner release bearing, the inner diaphragm spring 20 contacts with the inner pressure plate fulcrum 2103, drives the inner pressure plate 21 to move axially, and gradually compresses the gap between the inner friction plate 8 and the inner dual plate 9 until they are fully in contact. At this time, the inner clutch unit combines to transmit torque. The inner friction plate 8 transmits the torque to the output spline sleeve 18 through the inner clutch output spline teeth 1801. The output spline sleeve 18 transmits the torque to the gearbox shaft 19 through the output spline teeth 1802 meshing with the gearbox shaft spline teeth 1902. The needle bearing surface 1901 at the top of the gearbox shaft 19 cooperates with the needle bearing 7 to ensure the coaxiality of the gearbox shaft 1901 and the dual clutch. When the inner clutch unit is to be disconnected, the force on the inner release bearing is unloaded, and the return wave spring 24 installed on the housing step surface 1207 acts on the inner pressure plate return surface 2102 through elastic force, the inner pressure plate is reset, and a certain gap is generated between the inner friction plate 8 and the inner dual plate 9 and the power is disconnected.

[0068] The housing 12 is connected to the support plate 2 by bolts 1, and the bolts 1 pass through the bolt holes 203 and are fastened to the threaded holes 1201. The sealed bearing 5 is installed at the bearing hole 201 of the support plate, and the inner hole of the sealed bearing 5 is interference fit with the bearing sealing step 404. The outer retaining spring 13 is installed in the outer retaining spring groove 1204 of the housing to ensure the axial position of the outer support ring 14. The inner retaining spring 23 is installed in the inner retaining spring groove 1209 of the housing to ensure the axial position of the inner support ring 22. The gasket 17 is installed between the gasket support step 1208 and the output spline sleeve 18 to ensure the relative rotation of the two. The motor rotor frame 1202 is connected to the drive motor rotor to introduce the power of the second power drive motor.

[0069] The support plate 2 is sealed with the gearbox housing through the gearbox sealing step 202, and the shaft seal 6 is installed at the sealing hole 403 of the input spline sleeve 4, thereby ensuring the overall sealing of the series dual clutch and allowing the wet dual clutch to operate in the gearbox oil.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A series wet dual clutch, characterized in that: It comprises a radially arranged outer wet clutch unit and an inner wet clutch unit, and a housing unit. The outer wet clutch unit and the inner wet clutch unit are respectively connected in series to the front and rear ends of the drive motor. The power is transmitted in the order of the engine, the outer wet clutch unit, the drive motor, the inner wet clutch unit, and the gearbox. The outer wet clutch unit is used to connect and interrupt the power transmission between the drive motor and the engine, and the inner wet clutch unit is used to connect and interrupt the power transmission between the drive motor and the gearbox. The external wet clutch unit comprises an input spline sleeve and its input spline teeth, an external friction plate, an external dual plate, an external pressure plate, an external diaphragm spring, and a return spring. The external friction plate and the external dual plate are arranged at intervals and have gaps between them. The input spline sleeve transmits the power of the engine to the external wet clutch unit through the input spline teeth, introduces the power of the first engine into the series wet double clutch, and transmits the power to the external friction plate through the input spline teeth of the external wet clutch. The external diaphragm spring drives the external pressure plate to move axially, gradually compresses the gap between the external friction plate and the external dual plate until they are completely fitted, and the external wet clutch unit transmits the engine torque in combination; The housing unit comprises a housing and external spline teeth of the housing, wherein the external spline teeth of the housing receive power from the external wet clutch unit and further transmit the power to the internal wet clutch unit through the internal spline teeth of the housing; The housing unit further comprises bolts, a support plate, a sealed bearing, a housing, an external retaining spring, a gasket and an internal retaining spring. The housing is connected to the support plate by bolts, and the bolts are fastened through bolt holes and threaded holes; the sealed bearing is installed at the bearing hole of the support plate, and the inner hole of the sealed bearing is interference fit with the bearing sealing step; the external retaining spring is installed in the external retaining spring groove of the housing, the internal retaining spring is installed in the internal retaining spring groove of the housing, the gasket is installed between the gasket supporting step and the output spline sleeve, and the motor rotor frame is connected to the drive motor rotor; The internal wet clutch unit includes an output spline sleeve and its output spline teeth, an inner friction plate, an inner pair of plates, an inner diaphragm spring, an inner pressure plate, an inner support ring, and a return wave spring. The internal wet clutch unit transmits power to the inner pair of plates through the spline teeth inside the housing. The inner pair of plates and the inner friction plates are arranged at intervals and have gaps between them. The inner diaphragm spring drives the inner pressure plate to move axially, gradually compressing the gaps between the inner friction plates and the inner pair of plates until they are fully fitted. The internal wet clutch unit is combined to transmit torque.

2. The tandem wet dual clutch according to claim 1, characterized in that: The external wet clutch unit also includes a limit plate, a shaft seal, a needle bearing, and an external support ring. The shaft seal and the needle bearing are installed at the sealing hole. The limit plate is axially arranged on one side of the external dual plate, and the external pressure plate is axially arranged on the other side. The outer circle of the external diaphragm spring is constrained by the external support ring to form an external fulcrum of the external diaphragm. The external pressure plate passes through the through hole of the external pressure plate so that one side of the external diaphragm spring is fitted with the fulcrum of the external pressure plate. The external pressure plate positioning column passes through the external diaphragm positioning hole. When the external support circle arranged on the external diaphragm spring is axially moved by the thrust of the external release bearing, the external diaphragm spring contacts with the fulcrum of the external pressure plate, thereby driving the external pressure plate to move axially.

3. The tandem wet dual clutch according to claim 1, characterized in that: The return spring is circumferentially arranged in the return spring hole, the force on the external release bearing is unloaded, the elastic force of the return spring acts on the return angle of the external pressure plate, the external pressure plate is reset, a gap is generated between the external friction plate and the external dual plate, and the external wet clutch unit is disconnected.

4. The tandem wet dual clutch according to claim 1, characterized in that: The support plate is sealed with the gearbox housing through a gearbox sealing step, and the shaft seal is installed at the sealing hole of the input spline sleeve.

5. The tandem wet dual clutch according to claim 1, characterized in that: The housing friction surface is axially arranged on one side of the outer friction plate, and the inner pressure plate is axially arranged on the other side. The outer circle of the inner diaphragm spring is constrained by the inner supporting ring to form an outer fulcrum of the inner diaphragm, and one side of the inner diaphragm spring is in contact with the fulcrum of the inner pressure plate, and the inner pressure plate positioning column passes through the inner diaphragm positioning hole. When the inner supporting circle arranged on the inner diaphragm spring is axially moved by the thrust of the inner release bearing, the inner diaphragm spring contacts with the fulcrum of the inner pressure plate to drive the inner pressure plate to move axially.

6. The tandem wet dual clutch according to claim 1, characterized in that: The inner friction plate transmits the torque to the output spline sleeve through the output spline teeth of the inner wet clutch, and the output spline sleeve transmits the torque to the gearbox shaft through the meshing of the output spline teeth with the spline teeth of the gearbox shaft.

7. The tandem wet dual clutch according to claim 6, characterized in that: The needle bearing surface at the top end of the gearbox shaft cooperates with the needle bearing to make the gearbox shaft coaxial with the wet dual clutch.

8. The tandem wet dual clutch according to claim 1, characterized in that: The return wave spring is installed on the step surface of the housing, the force on the inner release bearing is unloaded, the return wave spring acts on the return surface of the inner pressure plate through elastic force, the inner pressure plate is reset, a gap is generated between the inner friction plate and the inner dual plate, and the inner wet clutch unit is disconnected.

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