Damper device for a strut

Abstract

The application discloses a damping device for a support rod, which comprises a shell, a pre-pressing fixing piece, a friction plate, a rotating plate, a rotation-stopping gasket and an elastic piece for generating elastic force, the elastic piece is arranged between the two rotating plates, and the friction plate is located between the rotating plate and the rotation-stopping gasket. The damping device for the support rod is provided with the elastic piece which is arranged between the stacked gaskets, the elastic force is used to press the friction plate to generate the friction force, the damping device has simple structure, the number of parts is reduced, the damping device is convenient to assemble and low in cost, the damping device occupies less space, and therefore the support rod has a wider adaptation range and the development cost of new projects is greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric supporting rod, in particular, the present application relates to a damping device for supporting rod. BACKGROUND

[0002] Electric supporting rod is more and more applied to various cars to realize automatic opening and closing of car tail door and enhance the comfort of use. In order to realize hovering at any position in the opening and closing process of car tail door, i.e. stopping at any angle in the opening and closing process of car tail door, the electric supporting rod is provided with a helical spring and a damping device for overcoming the gravity of the tail door.

[0003] The existing electric supporting rod damping device mainly comprises a friction plate, a rotation stop washer of a first damping unit, a rotation washer of a second damping unit and a spring of a pre-load unit, wherein the pre-load unit pre-tightens the first and second damping units. The damping device has strong temperature dependence and has continuous damping when rotating.

[0004] The existing electric supporting rod damping device has the following disadvantages: a large number of parts, large space occupation and high cost; the torque of the damping device changes obviously with temperature, especially the torque increases obviously at low temperature; and the damping device has poor heat dissipation effect when working. SUMMARY

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a damping device for supporting rod, which aims to reduce the occupied space.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a damping device for supporting rod, comprising a housing, a pre-pressing fixing piece, a friction plate, a rotation plate, a rotation stop washer and an elastic piece for generating elastic force, the elastic piece is arranged between two rotation plates, the friction plate is located between the rotation plate and the rotation stop washer.

[0007] The rotation stop washer is provided with two, the friction plate is provided with two, the two rotation plates are located between the two friction plates, and the two friction plates are located between the two rotation stop washers.

[0008] The housing has a clamping groove for embedding the rotation stop washer, and the clamping groove is a groove provided on the inner circular surface of the housing.

[0009] The clamping grooves are provided in plurality and all the clamping grooves are distributed in the circumferential direction.

[0010] The pre-pressing fixing piece is screw-connected with the housing.

[0011] The pre-pressing fixing piece is a retaining ring, and the housing has an annular groove for embedding the pre-pressing fixing piece.

[0012] The elastic piece is provided in at least one.

[0013] The damping device for the strut of the present invention is provided with an elastic member installed between the stacked gaskets, and friction is generated by squeezing the friction plate through elastic force. The damping device formed has a simple structure, a reduced number of parts, convenient assembly, and low cost. In addition, the damping device occupies less space, thereby making the strut adaptable to a wider range and greatly reducing the development cost of new projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This manual includes the following drawings, which show the following contents:

[0015] Figure 1 is an exploded schematic diagram of a damping device for a strut in accordance with the first embodiment;

[0016] Figure 2 is a cross-sectional view of a damping device for a strut according to embodiment 1;

[0017] Figure 3 is an exploded schematic diagram of a damping device for a support rod according to a second embodiment;

[0018] Figure 4 is a cross-sectional view of a damping device for a strut according to a second embodiment;

[0019] The markings in the figure are: 1. Pre-loaded fixing part; 2. Anti-rotation washer; 3. Friction plate; 4. Rotating plate; 5. Elastic part; 6. Housing; 7. Retaining ring. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation methods of the present invention through the description of embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention and to facilitate its implementation.

[0021] Example 1

[0022] like Figure 1 and Figure 2 As shown, this embodiment provides a strut damping device, comprising a housing 6, a preload fixture 1, a friction plate 3, a rotating plate 4, a rotation-stopping washer 2, and an elastic member 5 for generating an elastic force. The elastic member 5 is disposed between the two rotating plates 4, and the friction plate 3 is located between the rotating plate 4 and the rotation-stopping washer 2. When the preload fixture 1 is axially fixed to the housing 6, the elastic member 5 is compressed, thereby generating a rotational friction torque between the rotating plate 4, the friction plate 3, and the rotation-stopping washer 2.

[0023] Specifically, if Figure 1 and Figure 2As shown, two anti-rotation washers 2 and two friction plates 3 are provided. Two rotating plates 4 are sandwiched between the two friction plates 3. An elastic member 5 is sandwiched between the two rotating plates 4. The two friction plates 3 are sandwiched between the two anti-rotation washers 2. The two anti-rotation washers 2 are sandwiched between the housing 6 and the preload fixture 1. The friction plates 3, rotating plates 4, anti-rotation washers 2, and elastic member 5 are located within the inner cavity of the housing 6. One side of the rotating plate 4 contacts the friction plate 3, and the other side of the rotating plate 4 contacts the elastic member 5. The elastic force exerted by the elastic member 5 on the rotating plate 4 maintains contact between the rotating plate 4 and the friction plate 3. The rotating plate 4 is an annular structure with a ring of teeth in its center hole. The drive assembly of the electric strut is inserted into the center hole of the rotating plate 4 and meshes with the teeth. The rotating plate 4 generates damping torque as the drive assembly moves. The friction plate 3 is an annular structure with one side of the friction plate 3 contacting the rotating plate 4 and the other side of the friction plate 3 contacting the anti-rotation washer 2.

[0024] like Figure 1 and Figure 2 As shown, the housing 6 has a slot for the anti-rotation washers 2 to fit into. The slot is a groove provided on the inner circumference of the housing 6. The length of the slot is parallel to the axis of the housing 6. The protrusions provided on the outer edges of the two anti-rotation washers 2 fit into the slot, preventing the anti-rotation washers 2 and the housing 6 from rotating relative to each other.

[0025] like Figure 1 and Figure 2 As shown, multiple slots are provided, and all the slots are evenly distributed along the circumference.

[0026] like Figure 1 and Figure 2 As shown, the preload fixture 1 is threadedly connected to the housing 6. The preload fixture 1 is a circular ring structure with external threads on the outer circumference of the preload fixture 1 and internal threads on the inner circumference of the housing 6. Therefore, the preload fixture 1 is designed as a screw plug, which is threadedly connected to the housing 6 by adjusting the screw plug to squeeze the stacked gasket and elastic member 5.

[0027] The strut damping device of the above structure has the following advantages:

[0028] 1. The damping device takes up less space, which makes the support rod adaptable to a wider range and greatly reduces the development cost of new projects;

[0029] 2. The damping device has a simple structure, reduced number of parts, easy assembly and low cost;

[0030] 3. The number of friction plates 3 in the damping device is small, which can reduce the amount of grease applied to the friction plates 3, thereby reducing the impact of grease temperature changes on the torque of the damping device;

[0031] 4. Change the assembly position of the elastic member 5 to increase the space between the friction plates 3, and improve the heat dissipation effect of the damping device.

[0032] Example 2

[0033] The main difference between the damping device for the strut provided in this example and that in Example 1 is the pre-pressing fixing member. As shown in Figure 3 and Figure 4 In this example, the pre-pressing fixing member is a retaining ring 7, and the housing 6 has an annular groove for embedding the pre-pressing fixing member, which serves to press the stacked gaskets and the elastic member 5.

[0034] The advantage of Example 2 over Example 1 is that the length of the damping device is reduced, and the disadvantage is that the torque of the damping device cannot be adjusted during installation, and the torque can only be adjusted by replacing the elastic member.

[0035] The above has been described by way of example with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-described manner. Any non-essential improvement that uses the inventive concept and technical solution, or direct application of the above-described concept and technical solution to other occasions without modification, is within the scope of protection of the present application.

Claims

1. A damping device for a strut, comprising a housing, a preload fixing member, a friction plate, a rotating plate and a rotation-stopping washer, characterized in that: It also includes an elastic member for generating elastic force, the elastic member is arranged between the two rotating plates, and the friction plate is located between the rotating plate and the anti-rotation washer; After the pre-compression fixing member is axially fixed to the housing, the elastic member is compressed, so that a rotational friction torque is generated between the rotating plate, the friction plate and the anti-rotation washer; Two anti-rotation washers are provided, two friction plates are provided, two rotating plates are sandwiched between the two friction plates, an elastic member is sandwiched between the two rotating plates, two friction plates are sandwiched between the two anti-rotation washers, and two anti-rotation washers are sandwiched between the housing and the pre-compression fixing member; The friction plate, the rotating plate, the anti-rotation washer and the elastic member are located in the inner cavity of the housing. One side of the rotating plate contacts the friction plate, and the other side of the rotating plate contacts the elastic member. Under the elastic force applied by the elastic member to the rotating plate, the rotating plate and the friction plate maintain contact. The rotating plate is a circular ring structure, with a circle of teeth at the center hole of the rotating plate. The driving assembly of the electric strut is inserted into the center hole of the rotating plate and meshes with the teeth. The rotating plate generates a damping torque as the driving assembly moves. The friction plate is a circular ring structure, one side of the friction plate is in contact with the rotating plate, and the other side of the friction plate is in contact with the anti-rotation washer.

2. The strut damping device according to claim 1, characterized in that: The shell has a slot for the anti-rotation gasket to be embedded, and the slot is a groove arranged on the inner circumference of the shell.

3. The strut damping device according to claim 2, wherein: The card slots are multiple and all the card slots are distributed along the circumferential direction.

4. The strut damping device according to claim 1 or 2, characterized in that: The pre-compression fixing piece is threadedly connected to the housing.

5. The strut damping device according to claim 1 or 2, characterized in that: The pre-pressing fixing part is a retaining ring, and the housing has an annular groove for the pre-pressing fixing part to be embedded.

6. The strut damping device according to claim 1 or 2, characterized in that: At least one elastic member is provided.

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