TORQUE TRANSMISSION MEMBER AND CENTERING TOOL FOR CENTERING ASSEMBLY OF TORQUE TRANSMISSION MEMBER

Abstract

A torque transmission member for transmitting torque between a first rotating member and a second rotating member is provided. The torque transmission member has a first connection part and a second connection part which are concentrically arranged and fixedly connected with each other, wherein the first connection part is fixedly connected to the first rotating member, the second connection part is connected to the second rotating member in a torsion-proof manner, and the second connection part has a central hole for receiving the second rotating member. A cylindrical centering reference member is provided, the torque transmission member and the centering reference member are coaxially arranged by a centering tool during the process of assembling the torque transmission member, wherein the first connection part is provided with at least two through holes, and the centering tool passes through the through holes during a process of centering. A centering tool is provided for coaxially arranging the above-mentioned torque transmission member and a fixed cylindrical centering reference member, wherein the centering tool has at least two centering arms, wherein the centering arms are capable of passing through the through holes.

Claims

1. A torque transmission member for transmitting torque between a first rotating member and a second rotating member, wherein the torque transmission member has a first connection part and a second connection part which are concentrically arranged and fixedly connected with each other, wherein the first connection part is fixedly connected to the first rotating member, the second connection part is connected to the second rotating member in a torsion-proof manner, and the second connection part, has a central hole for receiving the second rotating member, wherein a cylindrical centering reference member is provided, the torque transmission member and the centering reference member are coaxially arranged by a centering tool during a process of centering the torque transmission member, wherein the first connection part is provided with at least two through holes, and the centering tool passes through the through holes during the process of centering.

2. The torque transmission member according to claim 1, wherein a distance between geometric centers of the through holes and a central axis of the torque transmission member is equal, and the through holes are evenly distributed on the first connection part along a circumferential direction.

3. The torque transmission member according to claim 2, wherein the distance is equal to an outer diameter of the centering reference member.

4. The torque transmission member according to claim 1, wherein the through holes are kidney-shaped.

5. The torque transmission member according to claim 1, wherein the first connection part is provided with a boss and the through holes are provided on the boss.

6. The torque transmission member according to claim 5, wherein an axial thickness of the boss is in a range of 7 mm to 21 mm.

7. The torque transmission member according to claim 1, wherein the first connection part is provided with at least two bolt holes for bolted connection with the first rotating member.

8. The torque transmission member according to claim 1, wherein the central hole of the second connection part is provided with a female spline for splined connection with the second rotating member.

9. A centering tool for coaxially arranging the torque transmission member according to claim 1 and a fixed cylindrical centering reference member, wherein the centering tool has at least two centering arms, wherein the centering arms are capable of passing through the through holes according to claim 1.

10. The centering tool according to claim 9, wherein the centering tool further has a centering cylinder, and an outer diameter of the centering cylinder is equal to an inner diameter of the central hole of the second connection part of the torque transmission member.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Preferred embodiments of the present disclosure will be schematically illustrated below with reference to drawings. Drawings are as follows:

[0018] FIG. 1 is a sectional view of a centering assembly process of a hub and a hybrid module according to a preferred embodiment of the present disclosure;

[0019] FIG. 2 is a perspective view of the hub according to FIG. 1;

[0020] FIG. 3 is a front view of the hub according to FIG. 1;

[0021] FIG. 4 is a side view of the hub according to FIG. 1; and

[0022] FIG. 5 is a perspective view of a centering tool according to a preferred embodiment of the present disclosure.

[0023] In different drawings, the same reference numerals are used for identical or functionally identical components.

DETAILED DESCRIPTION

[0024] A torque transmission member according to a preferred embodiment of the present disclosure is designed to be a hub 2 used in a hybrid vehicle. The hybrid vehicle particularly has a P2 hybrid module and further comprises an engine, a transmission, etc., wherein the hub 2 is particularly used for transmitting torque between the P2 hybrid module and the transmission.

[0025] FIG. 1 shows a sectional view of the hub 2 and the P2 hybrid module during centering assembly. As shown in FIG. 1, the P2 hybrid module has an axis of rotation and comprises a motor, a clutch, an electric central actuation device (EZA), a flange shaft 5, etc. A hub flexible disc 1 is driven by a rotor (not shown) of the motor. The hub 2 is connected to a component via the flexible disc 1, wherein the component transmits power of the motor rotor, and the hub 2 is connected to a transmission input shaft (not shown) in a torsion-proof manner, thereby transmitting the power of the motor to the transmission input shaft (not shown) via the flexible disc 1 and the hub 2. The flexible disc 1, the hub 2 and the hybrid module are arranged on a common axis of rotation, wherein the flexible disc 1 and the hub 2 are centered by for example, a central hole of the hub 2, and the concentric arrangement of the hub 2 and the hybrid module is implemented by a centering tool 3 according to the embodiment of the present disclosure, wherein a cylindrical shoulder 41 at an end of an EZA housing 4 can be selected as a centering reference member.

[0026] The hub 2 and the centering tool 3 according to a preferred embodiment of the present disclosure will be described below in detail.

[0027] FIGS. 2, 3 and 4 respectively show a perspective view, a front view and a side view of the hub according to FIG. 1. It can be seen from these three figures that the hub 2 has a first connection part 21 and a second connection part 22 which are concentrically arranged and fixedly connected with each other. The first connection part 21 is used for bolted connection with the flexible disc 1. The first connection part 21 is an annular plate, and a plurality of bolt holes 26 are uniformly provided on the first connection part 21. Each of the bolt holes 26 allows a bolt 6 (visible in FIG. 1) to pass through, wherein the bolt 6 connects the flexible disc 1 to the hub 2. The second connection part 22 is used for connecting with the transmission input shaft in a torsion-proof manner. The second connection part 22 has a central hole for receiving the transmission input shaft after centering assembly, and a female spline 25 is disposed on the inner circumference of the central hole for splined connection with the transmission input shaft. Therefore, torque is transmitted between the flexible disc 1 and the transmission input shaft through the hub 2. In addition, the diameter of the central hole of the second connection part 22 (more precisely, the diameter of the inner envelope circle of the female spline 25 of the hub 2) is less than the outer diameter of the cylindrical shoulder 41 used as the centering reference member.

[0028] A boss 24 extending axially is provided on the first connection part 21 of the hub 2, wherein the boss 24 is annular as a whole. As shown in FIG. 4, an axial thickness h of the boss 24 is preferably in the range of 7-21 mm, particularly preferably 14 mm. The boss 24 is provided with four through holes 23 through which the centering arms 32 of the centering tool 3 pass. The distance between geometric centers of the four through holes 23 and the central axis of the hub 2 is equal, and the four through holes 23 are distributed evenly along the circumferential direction. As shown in FIG. 3, the four through holes 23 are kidney-shaped, that is, the contours thereof are streamlined, and the circumferential direction of the through holes are respectively widened along the circumferential direction.

[0029] FIG. 5 shows a perspective view of the centering tool 3 according to a preferred embodiment of the present disclosure. The centering tool 3 has a centering cylinder 31, four centering arms 32, and a connection structure 33 for connecting the centering cylinder 31 to the centering arms 32. The diameter of the centering cylinder 31 is the same as the diameter of the envelope circle of the female spline 25 of the central hole of the second connection part 22, so that when the centering cylinder 31 is extended into the central hole, the hub 2 cannot move radially relative to the centering tool 3. The four centering arms 32 are arranged in parallel with the centering cylinder 31, and are all distributed evenly at the radial outer side of the centering cylinder 31, and the position of each centering arm 32 relative to the centering cylinder 31 corresponds to the position of each through hole 23 relative to envelope circle of the female spline 25 of the central hole. Therefore, the four centering arms 32 are equally spaced, and the distance between the four centering arms 32 and the envelope circle of the female spline 25 is equal. One end of each centering arm 32 has an axial positioning surface 34 and a radial positioning surface 35 for being clamped onto the cylindrical shoulder 41. The other end of each centering arm 32 (namely the end without a positioning surface) is connected to the centering cylinder 31 through the connection structure 33. The centering arms 32 can pass through the corresponding through holes 23 and be clamped onto the cylindrical shoulder 41 by means of the axial positioning surface 34 and the radial positioning surface 35, so that the centering tool 3 cannot move radially relative to the housing 4 of the electric central actuation device, thereby implementing the concentric arrangement of the hub 2 and the hybrid module, and defining the position of the centering tool 3 on one side along the axial direction.

[0030] Therefore, by means of the centering tool 3 according to a preferred embodiment of the present disclosure, the flexible disc 1, the hub 2 according to a preferred embodiment of the present disclosure and the hybrid module can be coaxially arranged by completing the following steps: [0031] 1) connecting the flexible disc 1 to the hub 2 by bolts; [0032] 2) installing the centering tool 3 onto the hub 2, wherein the centering cylinder 31 is extended into the central hole of the second connection part 22, and each centering arm 32 passes through the corresponding through hole 23 on the first connection part 21; [0033] 3) clamping each centering arm 32 of the centering tool 3 onto the centering reference member 41; [0034] 4) connecting the flexible disc 1 to the component that transmits power of the motor rotor; and [0035] 5) removing the centering tool 3.

[0036] Although possible embodiments have been described illustratively in the above description, it should be understood that there are still a large number of embodiment variations through combinations of all known technical features and embodiments as well as those are readily apparent to those skilled in the art. In addition, it should be further understood that the exemplary embodiments are just examples and shall not in any way limit the scope of protection, application and construction of the present disclosure. Through the foregoing description, it's more about to providing those skilled in the art a technical guide for converting at least one exemplary embodiment, in which various changes, especially changes in the functions and structures of the components, can be made as long as they do not depart from the scope of protection of the claims.

LIST OF REFERENCE NUMERALS

[0037] 1 First rotating member, flexible disc [0038] 2 Torque transmission member, hub [0039] 21 First connection part [0040] 22 Second connection part [0041] 23 Through hole [0042] 24 Boss [0043] 25 Female spline [0044] 26 Bolt hole [0045] 3 Centering tool [0046] 31 Centering cylinder [0047] 32 Centering arm [0048] 33 Connection structure [0049] 34 Axial positioning surface [0050] 35 Radial positioning surface [0051] 4 Housing of an electric central actuation device [0052] 41 Centering reference member, cylindrical shoulder [0053] 5 Flange shaft [0054] 6 Bolt [0055] H Thickness of the boss