阅读说明：本技术 转矩限制装置、扭矩传递装置和车辆 (Torque limiting device, torque transmission device, and vehicle ) 是由 范意中 包顺程 何连宝 于 2021-03-03 设计创作，主要内容包括：本发明提供一种转矩限制装置、扭矩传递装置和车辆。转矩限制装置用于连接第一部件和第二部件,并在所述第一部件和所述第二部件之间传递具有上限值的转矩,所述转矩限制装置包括盖(10)、从动盘(21)、压盘(30)和第一弹性件,所述盖(10)包括盖主体(11)和形成于所述盖主体(11)的外周部的钩部(12),在所述盖(10)的轴向(A)上,所述压盘(30)和所述第一弹性件夹设在所述盖主体(11)和所述钩部(12)之间,所述从动盘(21)部分地夹设在所述盖主体(11)和所述压盘(30)之间,所述盖(10)用于与所述第一部件相连,所述从动盘(21)用于与所述第二部件相连。根据本发明的转矩限制装置结构简单,零部件数量少,安装方便,成本低。(The invention provides a torque limiting device, a torque transmission device and a vehicle. A torque limiting device for connecting a first member and a second member and transmitting a torque having an upper limit value between the first member and the second member, the torque limiting device comprising a cover (10), a driven plate (21), a pressure plate (30) and a first elastic member, the cover (10) comprising a cover main body (11) and a hook portion (12) formed on an outer peripheral portion of the cover main body (11), the pressure plate (30) and the first elastic member being interposed between the cover main body (11) and the hook portion (12) in an axial direction (A) of the cover (10), the driven plate (21) being partially interposed between the cover main body (11) and the pressure plate (30), the cover (10) being for connecting to the first member, the driven plate (21) being for connecting to the second member. The torque limiting device has the advantages of simple structure, small number of parts, convenience in installation and low cost.)

1. A torque limiting device for connecting a first member and a second member and for transmitting a torque having an upper limit value between the first member and the second member,

the torque limiting device includes a cover (10), a driven plate (21), a pressure plate (30), and a first elastic member, the cover (10) includes a cover main body (11) and a hook portion (12) formed at an outer peripheral portion of the cover main body (11),

the first elastic member is disposed between the hook portion (12) and the pressure plate (30) in such a manner as to exert an elastic force, whereby the first elastic member exerts an elastic force to the pressure plate (30),

in the axial direction (A) of the cover (10), the driven plate (21) is at least partially interposed between the cover body (11) and the pressure plate (30),

one of the cover (10) and the driven disk (21) is used for receiving torque, and the other of the cover (10) and the driven disk (21) is used for outputting torque.

2. The torque limiting device according to claim 1, wherein the hook portion (12) extends substantially radially inward, the cover body (11) being formed integrally with the hook portion (12).

3. The torque limiting device according to claim 1, wherein the hook portion (12) is plural, and the plural hook portions (12) are provided at intervals in a circumferential direction of the cover main body (11).

4. The torque limiting device according to claim 1, wherein the first elastic member is a disc spring (40).

5. The torque limiting device according to claim 4, wherein an outer peripheral portion of the first elastic member forms a finger portion (41) extending radially outward of the cover (10), the finger portion (41) abutting the hook portion (12) in the axial direction (A).

6. The torque limiting device according to any one of claims 1 to 5, further comprising one or more second elastic members that connect the pressure plate (30) and the cover main body (11) together non-rotatably, the second elastic members having elasticity in the axial direction (A).

7. The torque limiting device according to claim 6, wherein the second elastic member is a leaf spring (50).

8. A torque transmission device, characterized by comprising a damping part and a torque limiting device according to any one of claims 1 to 7, the driven disc (21) of which is connected to the damping part.

9. The torque transmission device according to claim 8, wherein the damping member includes a damping spring, a flange, and a side plate, the damping spring being arranged between the flange and the side plate in a manner transmitting torque, one of the flange and the side plate being connected with the driven disc (21).

10. A vehicle, characterized by comprising a first component, a second component and a torque limiting device according to any one of claims 1 to 7, one of the cover (10) and the driven disc (21) of the torque limiting device being adapted to be connected to the first component, the other of the cover (10) and the driven disc (21) of the torque limiting device being adapted to be connected to the second component,

the first component is a flywheel of an engine, and the second component is a transmission or a motor.

Technical Field

The present invention relates to the field of transmissions, and more particularly to a torque limiting device, and a torque transmitting device and a vehicle including the torque limiting device.

Background

U.S. patent publication US2014/0094321a1 discloses a torque limiting device for a vehicle, which is provided between an engine and a transmission of a hybrid vehicle, and functions to restrictably transmit torque.

The maximum torque that can be transmitted by the torque limiting device can be set by adjusting the degree of deformation of the disc spring. The disk spring is used for pressing the pressure plate, and the pressure plate presses the friction piece against the second support plate. In order to provide a fulcrum for the outer peripheral portion of the disc spring, a first support plate is further provided, and the first support plate and the second support plate are connected together by a connecting member.

The first supporting plate in the scheme is high in manufacturing cost, and the complexity of the assembling process is increased due to the connection of the first supporting plate and the second supporting plate.

Disclosure of Invention

It is an object of the present invention to overcome or at least alleviate the above-mentioned deficiencies of the prior art and to provide a torque limiting device and a vehicle having a simple structure.

According to a first aspect of the present invention, there is provided a torque limiting device for connecting a first member and a second member and for transmitting a torque having an upper limit value between the first member and the second member, wherein,

the torque limiter device includes a cover including a cover main body and a hook portion formed at an outer peripheral portion of the cover main body,

the pressure plate and the first elastic member are interposed between the cover main body and the hook portion, the driven plate is partially interposed between the cover main body and the pressure plate in the axial direction of the cover,

the cover is used for being connected with the first component, and the driven disc is used for being connected with the second component.

In at least one embodiment, the cover body is formed integrally with the hook.

In at least one embodiment, the hook portion is provided in plural, and the plural hook portions are provided at intervals in the circumferential direction of the cover main body.

In at least one embodiment, the first elastic member is a disc spring.

In at least one embodiment, an outer peripheral portion of the first elastic member forms a finger portion extending radially outward of the cover, and the finger portion abuts against the hook portion in the axial direction.

In at least one embodiment, the driven plate includes a friction plate on an outer peripheral side, the friction plate being interposed between the pressure plate and the cover main body, and a maximum static friction force between the friction plate and the pressure plate and the cover main body corresponds to the upper limit value.

In at least one embodiment, the torque limiting device further includes one or more second elastic members that connect the pressure plate and the cover main body together non-rotatably, the second elastic members having elasticity in the axial direction.

In at least one embodiment, the second elastic member is a leaf spring.

In at least one embodiment, the second elastic member has an arc shape, one end of which is connected to the pressure plate and the other end of which is connected to the cover main body.

The invention also provides a torque transmission device, which comprises the torque limiting device and a damping component, wherein a driven disc of the torque limiting device is connected with the damping component. The damping part includes a damping spring, a flange, and a side plate, the damping spring being disposed between the flange and the side plate in a torque transmitting manner, one of the flange and the side plate being connected with the driven disc.

According to a second aspect of the present invention, there is provided a vehicle including a first member, a second member, and a torque limiting device according to the present invention, the cover of the torque limiting device being connected to the first member, the driven disk of the torque limiting device being connected to the second member,

the first component is a flywheel of an engine, and the second component is a transmission or a motor.

The torque limiting device has the advantages of simple structure, small number of parts, convenience in installation and low cost.

Drawings

Fig. 1 is a cross-sectional view of a torque limiting device according to one embodiment of the present invention.

Fig. 2 and 3 are schematic diagrams with portions broken away of a torque limiting device according to one embodiment of the present invention.

FIG. 4 is a schematic illustration of the arrangement of leaf springs according to one embodiment of the present invention.

Description of reference numerals:

10, covering; 11 a cover body; 110 end walls; 12 a hook part;

20 a vibration damping member; 21, a driven disc; 22 a damping spring; 23 a shaft portion;

30, pressing a plate; 40 disc springs; 41 fingers;

50 leaf springs; 51 one end; 52 on the other end.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.

Referring to fig. 1 to 4, unless otherwise specified, a denotes an axial direction of the torque limiting device, which axis direction a coincides with an axial direction of the cap 10 in the torque limiting device; r denotes a radial direction of the torque limiting device, which corresponds to a radial direction of the cover 10 in the torque limiting device; c denotes a circumferential direction of the torque limiting device, which coincides with a circumferential direction of the cover 10 in the torque limiting device.

Referring to fig. 1 to 3, the torque limiting device according to the present invention includes a cover 10, a driven plate 21, a pressure plate 30, a disc spring 40, and a leaf spring 50.

The torque limiting device can be used, for example, in a vehicle, in particular a hybrid vehicle, in which the cover 10 is intended to be connected in a rotationally fixed manner (non-rotatable manner) to a flywheel at the output of the engine, and the driven disk 21 is intended to be connected in a rotationally fixed manner to a transmission or an electric machine.

Alternatively, the driven plate 21 includes friction plates, which are located at the outer peripheral portion.

It will be appreciated that although in most cases power is transmitted from the engine end to the transmission end in the vehicle, it is possible that power may be transmitted from the transmission end to the engine end in different modes of operation and therefore the driven disc 21 is not necessarily a driven component and may be a driving member with respect to the cover 10. For convenience of description, the connection relationship and the operation principle of the cover 10 and the driven plate 21 will be described by taking a power transmission path from the engine side to the transmission side as an example.

The cover 10 includes a cover main body 11 and a hook 12.

The cover body 11 has an annular disk shape, and a plurality of hooks 12 projecting radially inward are formed on the outer peripheral portion of the cover body 11. The plurality of hook portions 12 are distributed at intervals in the circumferential direction C.

The hook portion 12 is formed integrally with the cover main body 11. For example, the hook portion 12 is formed by punching and bending the cover main body 11. Alternatively, the hook may also be a separate component, such as a pin or ring stop, that is connected or attached to the cover body 11.

The end wall 110 of the cover body 11 at the axial end portion and the hook portion 12 form an accommodation space for at least partially accommodating the friction plates, the pressure plate 30, and the disc spring 40.

Specifically, the pressure plate 30 presses the friction plates of the driven plate 21 against the end wall 110, or the friction plates are sandwiched between the pressure plate 30 and the end wall 110. The pressure exerted by the pressure plate 30 against the friction plates is provided by a belleville spring 40.

The outer peripheral portion of the disc spring 40 abuts against the hook portion 12 to obtain a fulcrum located at the outer peripheral portion; the inner peripheral portion of the disc spring 40 abuts against the pressure plate 30 to obtain a fulcrum located at the inner peripheral portion.

Alternatively, referring to fig. 1 and 3 together, the outer peripheral portion of the disc spring 40 is formed with spoke-like finger portions 41 extending radially outward. The finger 41 is engaged with the hook 12 and abuts against a surface of the hook 12 facing the end wall 110. The width of the finger 41 is substantially equal to the width of the hook 12 in the circumferential direction C.

Optionally, a plurality of convex structures are formed on the surface of the hook 12 facing the finger 41, and the convex structures can limit the finger 41 in the circumferential direction C and the radial direction R; alternatively, the face of the hook 12 facing the finger 41 is formed with a recess in which the finger 41 can be received to position the belleville spring 40 relative to the cap 10 in the circumferential direction C and in the radial direction R.

The fingers 41 have an outer diameter greater than the inner diameter of the hook 12. Since both the fingers 41 and the hooks 12 are discontinuous in the circumferential direction C, during installation, the fingers 41 can be extended in the axial direction a between the hooks 12 and the end wall 110 by inserting them through the spaces between adjacent hooks 12. Thereafter, the disc spring 40 is rotated in the circumferential direction C so that the finger portions 41 are aligned with the hook portions 12 in the circumferential direction C.

It is further preferred that the outer peripheral portion of the disc spring 40 has, in addition to the finger 41 which engages with the hook 12, an abutment portion extending in the axial direction which can be pressed against the pressure plate 30 in the region of the outer peripheral portion of the disc spring 40.

By adjusting the size (e.g., the degree of deformation) of the disc spring 40, the axial pressure applied by the pressure plate 30 to the friction plates can be adjusted, thereby adjusting the maximum static friction force to which the friction plates are subjected (i.e., the static friction force from the pressure plate 30 and the cover main body 11 to which both sides of the friction plates are subjected during operation of the torque limiting device to transmit torque). The static friction force corresponds to an upper limit value of the torque transmittable by the torque restriction device.

When the torque of the input end (for example, the cover 10) is less than or equal to the upper limit value, the cover 10 and the friction plate do not rotate relatively, and the torque received by the output end (the driven plate 21) is equal to the torque of the input end. When the torque of the input end is larger than the upper limit value, the cover 10 and the friction plate generate friction and rotate relatively, and the torque received by the output end is equal to the upper limit value.

The pressure plate 30 is connected to the cover 10 by a plurality of leaf springs 50. In the present embodiment, 3 leaf springs 50 (see fig. 4) are connected between the pressure plate 30 and the cover 10, and the three leaf springs 50 are provided at even intervals (at 120 ° intervals) in the circumferential direction C.

Leaf spring 50 is arcuate with one end 51 fixed to pressure plate 30, such as by a rivet, and the other end 52 fixed to end wall 110, such as by a rivet.

The leaf springs 50 give a certain elasticity between the pressure plate 30 and the cover 10 in the axial direction a, transmit torque in the circumferential direction C without relative rotation, and the plurality of leaf springs 50 distributed in the circumferential direction C also help the pressure plate 30 to complete centering with respect to the cover 10.

It should be appreciated that the present application also provides a torque transfer device and a vehicle including the torque limiting device.

The torque transmitting device includes a torque limiting device and a damping member 20.

The driven disc 21 is connected to the damping member 20. The damping part 20 comprises a damping spring 22, a flange and a side plate, the damping spring 22 being arranged between the flange and the side plate in a torque-transmitting manner. One of the flange and the side plate is connected to the driven plate 21, and the other of the flange and the side plate is connected to the shaft portion 23.

The invention has at least one of the following advantages:

(i) the torque limiting device has the advantages of simple structure, small number of parts, convenience in installation and low cost.

(ii) The platen 30 and the cover 10 are conveniently positioned and are not easy to slip due to relative rotation during operation.

Of course, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various modifications to the above-described embodiments of the present invention without departing from the scope of the present invention under the teaching of the present invention. For example:

(i) the belleville springs 40 may be replaced by another elastic member or members capable of providing an elastic force in the axial direction a, which is also referred to as a first elastic member in the present invention.

(ii) The leaf spring 50 may be replaced by one or more other elastic members capable of providing an elastic force in the axial direction a, which are also referred to as second elastic members in the present invention.

(iii) The torque limiting device according to the present application can also be applied to other torque transmission systems or power transmission systems in which the cover 10 is connected to the first member and the driven plate 21 is connected to the second member, thereby transmitting torque having an upper limit value between the first member and the second member.

With the torque limiting device in the above-described embodiment,

(i) although in the torque limiting device in the above-described embodiment, the cover 10 is the input member and the driven plate 21 is the output member, alternatively, it may be provided that the driven plate 21 is the input member connected to the engine and the cover 10 is the output member connected to the damper member at the rear end.

(ii) Although in the torque limiting device in the above described embodiment the pressure plate 30 is connected to the cover 10 by means of a second elastic member, in particular a leaf spring 50, it may alternatively be connected by means of a non-elastic member, such as a pin or the like, ensuring a synchronous torque transmission between the pressure plate 30 and the cover 10.