阅读说明：本技术 扭矩限制器 (Torque limiter ) 是由 T.卡马克 M.莫利 于 2020-09-30 设计创作，主要内容包括：本发明涉及一种扭矩限制器(10),用于车辆变速器单元,并具有第一盖(20)、连接至所述第一盖(20)的第二盖(30)以及设置在所述第二盖(30)与所述第一盖(20)之间的摩擦单元(60)。本发明的改进在于提供了多个固定元件(40)以提供第一盖(20)和第二盖(30)到彼此的连接,所述固定元件(40)包括至少一个延伸部(40)且包括容纳部(41),所述至少一个延伸部设置在所述第一盖(20)和所述第二盖(30)中的至少一个上,所述容纳部设置在所述第一盖(20)和所述第二盖(30)中的另一个上,所述延伸部(42)以紧密的方式定位在所述容纳部(41)中。(The invention relates to a torque limiter (10) for a vehicle transmission unit, having a first cover (20), a second cover (30) connected to the first cover (20), and a friction unit (60) arranged between the second cover (30) and the first cover (20). The improvement of the invention consists in providing a plurality of fixing elements (40) to provide the connection of the first and second covers (20, 30) to each other, said fixing elements (40) comprising at least one extension (40) provided on at least one of said first and second covers (20, 30) and comprising a housing (41) provided on the other of said first and second covers (20, 30), said extension (42) being positioned in a tight manner in said housing (41).)

1. A torque limiter (10) for a vehicle transmission unit and having a first cover (20), a second cover (30) connected to the first cover (20), and a friction unit (60) arranged between the second cover (30) and the first cover (20), wherein a plurality of fixing elements (40) are provided to provide connection of the first cover (20) and the second cover (30) to each other,

the fixing element (40) comprising at least one extension (42) provided on at least one of the first cover (20) and the second cover (30), and a receptacle (41) provided on the other of the first cover (20) and the second cover (30),

the extension (42) is positioned in the housing (41) in a tight manner.

2. The torque limiter (10) of claim 1,

the extension portion (42) is directly provided on at least one of the first cover (20) and the second cover (30), and the receiving portion (41) is directly provided on the other of the first cover (20) and the second cover (30).

3. The torque limiter (10) of claim 1,

the first and second covers (20, 30) include a joining surface (43), at the joining surface (43), the covers (20, 30) contact each other at a plane orthogonal to the rotational axis of the torque limiter (10).

4. The torque limiter (10) of claim 3,

the extension portion (42) includes an extension end (43) and is provided in a form widening toward the extension end (43), and the receiving portion (41) is provided in a form widening from the joining surface (44) toward a face opposite to the joining surface (44).

5. The torque limiter (10) of claim 4,

the extension end (43) is placed into the receiving portion (41).

6. The torque limiter (10) of any one of the preceding claims,

the first cover (20) and the second cover (30) are extruded and formed from a metal plate.

7. The torque limiter (10) of any one of the preceding claims,

the fixing member (40) includes a plurality of extensions (42) and a plurality of receiving portions (41), and

at least one of the extensions (42) is provided on the first cover (20), and a receiving portion (41) that operates together with the extension (42) is provided on the second cover (30),

at least one of the extensions (42) is provided on the second cover (30), and a receiving portion (41) that operates together with the extension (42) is provided on the first cover (20).

8. The torque limiter (10) of any one of the preceding claims,

the housing (41) and the extension (42) are obtained by pressing against each other without using any additional parts.

9. The torque limiter (10) of any of claims 4 to 7,

the extension (42) and the receptacle (41) are provided on the first cover (20) and the second cover (30), and the receptacle (41) is provided in the form of an open-ended hole, the extension (42) is configured to be placed into the receptacle (41), and the widened form of the extension (42) is obtained by deformation of the extension (42) caused by pressure applied to the extension (42) after placing the extension (42) into the receptacle (41).

10. An assembly method for a torque limiter (10), wherein the torque limiter (10) has a first cover (20), a second cover (60) connected to the first cover (20) and to a friction unit (60), a joining surface (44) being provided in each of the first cover (20) and the second cover (30) in a plane orthogonal with respect to a rotation axis of the torque limiter (10), the assembly method comprising the steps of:

providing a first cover (20), a second cover (30) and a friction unit (60),

positioning the friction unit (60) between the first cover (20) and the second cover (30),

placing the joining surface (44) of the first cover (20) against the joining surface (44) of the second cover (30),

reshaping at least one of the first and second covers (20, 30) in such a way as to form a retaining portion (45), the retaining portion (45) and the other retaining portion (45) being matched in such a way as to provide a fixation of the first and second covers (20, 30) to each other.

11. The assembly method of claim 10,

the torque limiter (10) includes at least one extending portion (42) provided on at least one of the first cover (20) and the second cover (30), and a receiving portion (41) provided on at least the other of the first cover (20) and the second cover (30), an assembling process including a caulking step, and the receiving portion (41), the extending portion (42), and the holding portion (45), and the other holding portion (45) are obtained in a process of applying a pressing method to each other without using any additional member, and a tool applying a pressing method to each other without using any additional member is configured to form the holding portion (45) and the other holding portion (45) in the extending portion (42) and the receiving portion (41), respectively.

12. The assembly method of claim 10,

the torque limiter (10) includes at least one extension (42) provided on at least one of the first cover (20) and the second cover (30), and a receiving portion (41) provided on at least the other of the first cover (20) and the second cover (30), and the receiving portion (41) and the extension (42) are formed on the first cover (20) and the second cover (30), and an assembling process includes the steps of: -placing the extension (42) into the housing (41) before placing the joining surface (44) of the first cover (20) into the joining surface (44) of the second cover (30); and the step of deforming is a step of pressing the extended portion (42), whereby a holding portion (45) provided on the extended portion (42) is shaped complementary to another holding portion (45) formed inside the housing portion (41).

Technical Field

The present invention relates to a torque limiter for a vehicle transmission unit, having a first cover, a second cover connected to the first cover, and a friction unit disposed between the second cover and the first cover.

Background

Excessive torque transfer to a transmission in a motor vehicle can cause various transmission elements, such as gears, to fail. To eliminate the problem, a torque limiting mechanism is used.

In some known solutions, the whole system is stopped to prevent damage to the mechanism due to high torque. In another approach known in the art, a friction element having friction linings is provided when the torque reaches a predetermined level, and the friction element slips when the transmitted torque reaches a desired value.

The torque limiter is used in particular in hybrid vehicles, and is provided with a pressure plate between two covers. A compression spring disposed on one side of the pressure plate causes a friction plate disposed on the other side of the pressure plate to be secured between the pressure plate and the cover. Due to the structure, when the friction plate rotates along the central axis of the torque limiter, the two covers also rotate. Also, when the torque transmitted from the friction plates to each other through the cover exceeds a predetermined value, relative displacement of the cover with respect to the friction plates becomes possible.

In the torque limiter, methods such as a gear and nut connection and a mesh connection or a screw connection are used when fixing the covers to each other. These methods have the following disadvantages in terms of use and production:

safety precautions must be taken to prevent automatic disconnection,

the screw has no centering quality,

due to the effect of the notches, there is a risk of breakage,

temporary loss of meeting when converting forward motion to rotational motion.

As a result, due to all of the above problems, improvements in the related art are needed.

Disclosure of Invention

The present invention relates to a torque limiter which is intended to eliminate the above-mentioned drawbacks and bring about new advantages to the related art.

The invention aims to provide a torque limiter which is easy to assemble.

It is another object of the present invention to provide a torque limiter having an extended life.

To achieve all of the above objects and others that will become apparent from the following detailed description, the present invention is a torque limiter for a vehicle transmission unit having a first cover, a second cover connected to the first cover, and a friction unit disposed between the second cover and the first cover. The improvement of the invention is therefore that a plurality of fixing elements are provided to provide the connection of the first and second covers to each other, said fixing elements comprising at least one extension provided on at least one of the first and second covers and comprising a housing provided on the other of the first and second covers, said extension being positioned in said housing in a tight manner. Thus, the connection of the first and second covers to each other is provided by plastic deformation without any connecting elements.

In a possible embodiment of the present invention, the extension is directly provided on at least one of the first cover and the second cover, and the receiving portion is directly provided on the other of the first cover and the second cover. Thus, the cover on which the extension is located and the cover on which the receiving portion is located are engaged with each other.

In another possible embodiment of the invention, the first and second covers comprise joining surfaces, wherein the covers contact each other at a plane orthogonal to the rotational axis of the torque limiter. Therefore, the covers engaged with each other by the coupling surfaces of the covers are connected in an inseparable manner.

In another possible embodiment of the present invention, the extension includes an extension end and is provided in a form widening toward the extension end, and the receiving portion is provided in a form widening from the joining surface toward a face opposite to the joining surface. Therefore, when a force is applied to separate the extension portion from the receiving portion, the separation is prevented by virtue of the arrangement (restating) thereof by the joining surface.

In another possible embodiment of the invention, the extension end is placed into the receptacle. Thus, its connection is provided by plastic deformation, which will be provided at the extended end.

In another possible embodiment of the invention, the first cover and the second cover are extruded and formed from a metal sheet. Thus, a metal plate that deforms under high forces may exhibit the ability to resist the forces experienced during operation of the torque limiter.

In a further possible embodiment of the invention, the fixing element comprises a plurality of extensions and a plurality of receptacles, and at least one extension is provided on the first cover and a receptacle operating with the extension is provided on the second cover, and at least one extension is provided on the second cover and a receptacle operating with the extension is provided on the first cover. Thus, by providing the form of the extension and the receiving portion on the first cover and the second cover, respectively, a greater ability to resist a force in opposite directions is exhibited.

In another possible embodiment of the invention, the housing and the extension are obtained by pressing against each other without any additional parts. Thus, the first cover and the second cover are coupled to each other during the production process without using any additional connecting member.

In another possible embodiment of the present invention, the extension and the receiving portion are provided on the first cover and the second cover, and the receiving portion is provided in the form of an open hole, and the extension is configured to be placed into the receiving portion, and the widened form of the extension is obtained by deformation of the extension caused by pressure applied to the extension after placing the extension into the receiving portion. Thus, the extension is deformed in the receptacle and provides the joining of the two covers to each other.

In another possible embodiment of the present invention, the torque limiter has a first cover, a second cover connected to the first cover and to the friction unit, a joining surface being provided in each of the first cover and the second cover in a plane orthogonal with respect to a rotation axis of the torque limiter, the assembling method includes the steps of:

-providing a first cover, a second cover and a friction unit,

positioning a friction unit between the first cover and the second cover,

-placing the joining surface of the first cover against the joining surface of the second cover,

-reshaping at least one of the first and second covers in such a way as to form a holding portion, said holding portion and the other holding portion being mated in such a way as to provide a fixation of the first and second covers to each other.

Therefore, a durable structure having a long life can be obtained without using any additional connecting member in the manufacturing process of the torque limiter.

In another possible embodiment of the present invention, the torque limiter includes at least one extending portion provided on at least one of the first cover and the second cover, and a receiving portion provided on at least the other of the first cover and the second cover, the assembling process includes a caulking step, and the receiving portion, the extending portion, and the holding portion and the other holding portion are obtained in a process of applying a pressing method to each other without using any additional component, and a tool applying the pressing method to each other without using any additional component is configured to form the holding portion and the other holding portion in the extending portion and the receiving portion, respectively.

In another possible embodiment of the present invention, the torque limiter includes at least one extension part provided on at least one of the first cover and the second cover, and a receiving part provided on at least the other of the first cover and the second cover, and the receiving part and the extension part are formed on the first cover and the second cover, and the assembling process includes the steps of: placing the extension into the receiving part before placing the joining surface of the first cover to the joining surface of the second cover; and the deforming step is a step of pressing the extension portion, and therefore, the holding portion provided on the extension portion is shaped to be complementary to another holding portion formed inside the accommodating portion.

Drawings

In fig. 1, a schematic perspective view of the subject torque limiter is given.

In fig. 2, a schematic cross-sectional view is given showing a state before assembling the first cover and the second cover by a hammering method in the subject torque limiter.

In fig. 3, a schematic cross-sectional view is given, which shows a state after assembling the first cover and the second cover by a hammering method in the subject torque limiter.

In fig. 4, a schematic cross-sectional view is given, which illustrates the application of the compression method to the fixation element without the use of additional components in the subject torque limiter.

In fig. 5, a schematic diagram is given, which illustrates the application of the compression method to the stationary element without the use of additional components in the subject torque limiter.

In fig. 6, a schematic cross-sectional view of a prior art of the subject torque limiter is given.

Detailed Description

In this detailed description, the subject torque limiter (10) is described with reference to an example only for the purpose of making the subject matter easier to understand, without forming any limiting effect.

As shown in fig. 1, the subject torque limiter (10) has a first cover (20), a second cover (30) connected to the first cover (20), and a friction unit (60) disposed between the second cover (30) and the first cover (20). In addition, each of the first cover (20) and the second cover (30) has a coupling surface (44) provided on a plane orthogonal to the rotational axis of the torque limiter (10).

The friction unit (60) has a pressure plate (61) disposed between the first cover (20) and the second cover (30). A compression spring (62) provided on one side of the pressure plate (61) causes a friction plate (63) provided on the other side of the pressure plate (63) to be fastened between the pressure plate (61) and the first cover (20). Due to the structure, when the friction plate (63) rotates at the central axis of the torque limiter (10), the first cover (20) and the second cover (30) also rotate. In addition, when the torque transmitted from the friction plate (63) to the first cover (20) and the second cover (30) exceeds a predetermined value, the first cover (20) and the second cover (30) can be relatively displaced with respect to the friction plate (63). Thus, the transmitted torque can be limited.

In fig. 2, 3, 4 and 5, detailed views of the extension (42) and the housing (41) of a possible embodiment of the invention are given. According to said embodiment, there is at least one receptacle (41) on the first cover (20) and/or the second cover (30). The extension (42) placed in the receptacle (41) is shaped in a manner adapted to the form of the receptacle (41). In more detail, the accommodating portion (41) is formed to have a predetermined shape. The extension (42) is embodied mainly in the form of an accessible receptacle (41).

In fig. 2, in the subject torque limiter (10), a schematic sectional view is given, which shows the state of the first cover (20) and the second cover (30) before assembly by the hammering method. In the hammering method, the joining surfaces (44) of the first cap (20) and the second cap (30) correspond to each other. An extension (42) on the first cover (20) and/or the second cover (30) engages with a receptacle (41) on the first cover (20) and/or the second cover (30). In fig. 3, in the subject torque limiter (10), a schematic sectional view is given, which shows the state of the first cover (20) and the second cover (30) after being assembled by a hammering method. Therefore, when the extended portion (42) is in the housing portion (41), high pressure is applied from at least one extended end (43) provided on one side of the extended portion (42). By virtue of this, in the extended portion (42), a form is obtained which widens towards the extended end (43), and a holding portion (45) is obtained which widens from at least one joining surface (44) of the accommodating portion (41) towards the opposite face of the joining surface (44). The holding portion (45) is formed in the extension portion (42) and the receiving portion (41) and is complementary to each other.

In fig. 4, a schematic cross-sectional view is given, which illustrates the application of the compression method to the fixation element (40) without the use of additional components in the subject torque limiter (10). Thus, the tight engagement of the receptacle (41) and the extension (42) on the torque limiter (10) is achieved by a compression method without using any additional components. The compression method without any additional component is a fixing of the joining surfaces (44) of at least two plates under high force. In fig. 5, a schematic diagram is given, which illustrates the application of the compression method to the fixed element (40) without the use of additional components in the subject torque limiter (10). In the pressing method without using any additional member, the first cover (20) and the second cover (30) substantially correspond to each other. The first cover (20) and the second cover (30) are fastened between at least one joining mold (70) and at least one joining cap (71) positioned opposite to the joining mold (70). The joining die (70) substantially matches the shape of the receptacle (41). The link cap (71) is movable in a manner to enter or remove at least partially from the link mold (70). When the joining cap (71) is moved toward the joining mold (70), the first cover (20) and the second cover (30) form at least one receiving portion (41) and at least one extending portion (42). By this method, the accommodating portion (41) having a form narrowing toward the projection is formed, and the extending portion (42) having a form widening toward the accommodating portion (41) is formed. Thereby, the extension portion (42) and the receiving portion (41) are connected to each other in a tight engagement without being separated.

In all these embodiments, the connection of the two covers in the torque limiter (10) to each other in a non-removable manner is provided by means of the engagement of the first cover (20) and/or the second cover (30) with each other and by plastic deformation thereof. By positioning at least one receptacle (41) and at least one extension (42) in an array on the first cover (20) and the second cover (30), the covers grip each other against forces in opposite directions. In other words, in the torque limiter (10), the accommodating portion (41) and the extending portion (42) are positioned on the first cover (20) and the second cover (30) in a sequential arrangement. Thereby, the first cover (20) and the second cover (30) are prevented from being separated from each other by resisting forces in opposite directions. Furthermore, the application of the connecting element and the connecting process are eliminated. The torque limiter (10) becomes lighter and connection problems are reduced because no additional connecting elements are used.

The scope of the invention is set forth in the appended claims and is not limited to the illustrative disclosure given above under the detailed description. Since similar embodiments may be made by persons skilled in the relevant art without departing from the main principle of the invention, it is obvious that similar embodiments can be made by persons skilled in the relevant art from the foregoing disclosure.

Reference mark

10 torque limiter

20 first cover

30 second cover

40 fixing element

41 accommodating part

42 extension part

43 extended end

44 joining surface

45 holding part

60 friction unit

61 pressing plate

62 pressure spring

63 Friction plate

70 connecting mould

71 connecting cap