Damper for electric supporting rod

Abstract

The invention relates to the field of dampers, in particular to a damper for an electric supporting rod, which comprises a shell and a screw plug pre-tightening piece connected to the shell, the shell comprises a shell body; the housing body is provided with an assembling sinking groove. A friction stop mechanism is arranged in the assembly sinking groove; the screw plug pre-tightening piece is connected with the friction stop mechanism through the pre-pressing component. The pre-pressing component comprises a pre-tightening protrusion arranged on the screw plug pre-tightening piece. The screw plug pre-tightening piece abuts against the friction stop mechanism through the pre-tightening protrusion. Through the arrangement of the pre-pressing component, the pre-pressing component replaces an elastic component in a traditional damper, by means of the design, the use of overall parts of the damper can be reduced, integration to a certain degree is achieved, the overall structure of the damper is compact, the occupied space of the overall structure is small, and by reducing the use of the elastic component, the cost of the damper is reduced. And the production cost of the damper can be reduced to a certain extent.

Description

Technical Field

[0001] The invention relates to the field of dampers, in particular to a damper for an electric strut. Background Art

[0002] In order to meet the demand of people to open and close the car door normally without touching the car door, many remote control or induction controlled electric door opening and closing systems are currently on the market.

[0003] The most critical mechanical component of the electric door opening and closing system is the electric strut. The function of the damper in the electric strut is to enable the car door to hover at any position.

[0004] Existing electric strut dampers are generally structures in which multiple layers of anti-rotation washers, friction plates and rotating washers are stacked by elastic element force, and torque is provided by rotating toothed washers, such as patent CN201922466403.6 - a damper used on an electric strut of an automobile.

[0005] However, the existing damper inevitably needs to use elastic elements, and the provision of the elastic elements will not only increase the number of overall parts of the damper, but will also increase the subsequent assembly process of the damper.

[0006] Therefore, in order to improve or solve at least one of the above problems, it is urgent to optimize the design of the existing damper structure. Summary of the invention

[0007] An object of the present invention is to provide a damper structure capable of reducing assembly parts.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A damper for an electric strut comprises a housing and a screw plug pre-tightening member connected to the housing;

[0010] The housing comprises a housing body; the housing body is provided with an assembly sink; a friction stop mechanism is provided in the assembly sink;

[0011] The screw plug preload is connected to the friction stop mechanism via a preload component; the preload component comprises a preload protrusion arranged on the screw plug preload; the screw plug preload is pressed against the friction stop mechanism via the preload protrusion.

[0012] The friction stop mechanism comprises a transmission friction member and a rotation-stopping element; the transmission friction member and the rotation-stopping element are arranged in close contact with each other.

[0013] The transmission friction member comprises a rotating element and a friction element, and the rotating element contacts with the anti-rotation element through the friction element.

[0014] The friction element and the anti-rotation element or the rotating element are an integrated structure.

[0015] The friction element and the rotating element are of an integrated structure; the rotating element is connected to the friction element via a clamping mechanism;

[0016] The clamping mechanism comprises a clamping groove arranged on the rotating element, a clamping protrusion is arranged on the friction element, and the friction element is plugged into the rotating element through the clamping protrusion.

[0017] The screw plug pre-tightening member is a plastic member.

[0018] The friction stop mechanism comprises two anti-rotation elements; the transmission friction member comprises two friction elements, and the two friction elements are distributed on both sides of the rotating member; the two anti-rotation elements are distributed on both sides of the transmission friction member.

[0019] At least three pre-tightening protrusions are arranged on the screw plug pre-tightening member, and the three pre-tightening protrusions are evenly distributed along the circumference of the screw plug pre-tightening member.

[0020] The screw plug pre-tightening member comprises a screw plug body; a material reduction sinking groove is arranged on one side of the screw plug body away from the friction stop mechanism; and an auxiliary assembly groove is arranged on the inner wall of the material reduction sinking groove.

[0021] The screw plug pre-tightening piece is screwed in the placement sink groove; a waist-shaped welding hole is arranged on the shell body; and the waist-shaped welding hole is communicated with the placement sink groove.

[0022] The advantages of the present invention are:

[0023] The invention discloses a damper for an electric strut.

[0024] The present invention replaces the elastic component in the traditional damper by setting a pre-stressing component. Such a design can reduce the use of overall parts of the damper and achieve a certain degree of integration, so that the overall structure of the damper is compact and the overall structure occupies a small space. In addition, by reducing the use of elastic components, the production cost of the damper can be reduced to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following is a brief description of the contents expressed in the drawings of the present invention and the symbols in the drawings:

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 It is an exploded view of the present invention.

[0028] Figure 3 It is a schematic structural diagram of the screw plug pre-tightening member in the present invention.

[0029] Figure 4 It is a cross-sectional view of the integrated transmission friction parts in the present invention.

[0030] Figure 5 This is an exploded view of the integrated transmission friction parts in the present invention.

[0031] The marks in the above figure are:

[0032] 1. Screw plug preload, 1-1. Preload protrusion, 2. Anti-rotation element, 4.1 Transmission friction element, 3. Friction element, 4. Rotating element, 5. Housing. DETAILED DESCRIPTION

[0033] The specific implementation of the present invention will be further explained in detail below by describing the optimal embodiment with reference to the accompanying drawings.

[0034] A damper for an electric strut comprises a shell 5 and a screw plug preload 1 connected to the shell 5; the shell 5 comprises a shell body 5-3; an assembly recess 5-2 is provided on the shell body 5-3; a friction stop mechanism is provided in the assembly recess 5-2; the screw plug preload 1 is connected to the friction stop mechanism via a preload component; the preload component comprises a preload protrusion 1-1 provided on the screw plug preload 1; the screw plug preload 1 is pressed against the friction stop mechanism via the preload protrusion 1-1; the present invention replaces the elastic component in a traditional damper by providing the preload component, and such a design can reduce the use of the overall components of the damper and realize a certain degree of integration, so that the overall structure of the damper is compact and the overall structure occupies a small space, and by reducing the use of elastic components, the production cost of the damper can be reduced to a certain extent.

[0035] The damper disclosed by the invention is mainly suitable for an electric strut.

[0036] Specifically, the damper for the electric strut disclosed in the present invention mainly includes a shell 5 and a screw plug preload 1 connected to the shell 5; the shell 5 is a connection basis, which facilitates the installation and arrangement of the remaining components, and the screw plug preload 1 plays a good extrusion and restraint role. By controlling the assembly position of the screw plug preload 1 in the shell 5, the size of the friction force between the friction stop mechanism can be controlled, and then the torque generated when the rotating element 4 and the friction element 3 rotate can be controlled.

[0037] In the present invention, the shell 5 includes a shell body 5-3; the shell body 5-3 is the main structure of the shell 5, and an assembly groove 5-2 is provided on the shell body 5-3; the setting of the assembly groove 5-2 forms a groove structure on the shell 5, which is convenient for the arrangement and placement of the friction stop mechanism and the screw plug preload 1 during subsequent use. At the same time, in order to facilitate the installation of the screw plug preload 1 on the shell body 5-3, the present invention requires that the inner wall of the assembly groove 5-2 is provided with an internal thread, and the outer side of the bolt preload is provided with an external thread. During subsequent connection, the screw plug preload 1 is connected to the assembly groove 5-2 of the shell 5 through threads.

[0038] In addition, in the present invention, a friction stop mechanism is provided in the assembly groove 5-2; the friction stop mechanism is arranged in the assembly groove 5-2, and during subsequent use, the components in the friction stop mechanism rotate relative to each other, thereby generating friction and ultimately generating corresponding torque, thereby improving the stability of the electric strut hovering during subsequent use.

[0039] At the same time, in the present invention, the screw plug preload 1 is connected to the friction stop mechanism through a preload component; the preload component includes a preload protrusion 1-1 arranged on the screw plug preload 1; the screw plug preload 1 is pressed against the friction stop mechanism through the preload protrusion 1-1; the present invention sets the preload component, and the preload component preloads and squeezes the friction stop mechanism, so that the friction stop mechanism can be subjected to the set preload, thereby replacing the traditional elastic component when used, reducing the investment in the traditional damper elastic component, and at the same time, the preload component disclosed in the present invention mainly includes the preload protrusion 1-1, and the preload protrusion 1-1 is arranged on the screw plug preload 1; this makes the preload component and the screw plug preload 1 equivalent to an integrated structure, which is convenient for the arrangement and placement of the preload component; it also facilitates the subsequent actual assembly operation and reduces the investment in parts.

[0040] Furthermore, in the present invention, the friction stop mechanism includes a transmission friction part 4.1 and a stop element 2; the transmission friction part 4.1 and the stop element 2 are arranged in close contact with each other; the stop element 2 is arranged in a groove body through the outer edge, which is protruded and clamped on the inner wall of the outer shell assembly groove 5-2, and plays a relative limiting role. Such an arrangement ensures that the stop element 2 does not rotate relative to the outer shell 5 after assembly; it is convenient for the subsequent cooperation of the transmission friction part 4.1 to generate friction force, and then generate corresponding torque; in addition, the transmission friction part 4.1 cooperates with the gear or other external parts through internal and external splines, which is convenient for the subsequent use to transmit the corresponding torque outward.

[0041] In the present invention, after the housing 5 is fixed, the transmission friction member 4.1 can rotate in the housing 5, and the transmission friction member 4.1 cooperates with the anti-rotation element 2 to generate friction force, and then generate corresponding torque.

[0042] Furthermore, in the present invention, the transmission friction part 4.1 includes a rotating element 4 and a friction element 3. The rotating element 4 is in contact with the anti-rotation element 2 through the friction element 3; the rotating element 4 is used for subsequent connection with an external component, and the main body of the rotating element 4 is a circular disk structure, and the main body of the friction element 3 is also a circular disk structure. The rotating element 4 and the friction element 3 can be designed as an integrated structure or a split structure according to different working conditions.

[0043] In the present invention, the friction element 3 is provided to facilitate the coordinated use of the transmission friction member 4.1 and the anti-rotation element 2, thereby facilitating the entire damper to quickly generate corresponding torque and improve the response efficiency of the damper.

[0044] Meanwhile, in the present invention, the friction element 3 and the anti-rotation element 2 or the rotating element 4 are an integrated structure; based on the above design, the present invention has a variety of implementation schemes.

[0045] Solution 1: The friction element 3, the rotating element 4 and the anti-rotation element 2 are all designed in a split type;

[0046] Based on such a setting, while being able to achieve the set torque generation, it is also convenient for the replacement of single parts; depending on the usage scenario and working conditions, parts of different materials can be selected to work together.

[0047] Solution 2: The anti-rotation element 2 and the friction element 3 are an integrated structure;

[0048] Based on such a setting, the anti-rotation element 2 and the friction element 3 are equivalent to one device. During subsequent use, the rotating element 4 and the device formed by the anti-rotation element 2 and the friction element 3 rub against each other to generate torque. Such a setting can not only achieve the set torque generation, but also reduce the number of damper parts used and simplify the overall assembly process.

[0049] Solution 3: The friction element 3 and the rotating element 4 are an integrated structure;

[0050] Based on such a setting, the rotating element 4 and the friction element 3 are equivalent to one device. During subsequent use, the anti-rotation element 2 and the device formed by the rotating element 4 and the friction element 3 rub against each other to generate torque. Such a setting can not only achieve the set torque generation, but also reduce the number of damper parts used and simplify the overall assembly process.

[0051] Furthermore, in the present invention, the friction element 3 and the rotating element 4 are an integrated structure; the rotating element 4 is connected to the friction element 3 through a clamping mechanism; the setting of the clamping mechanism facilitates the relative limitation between the friction element 3 and the rotating element 4; specifically, in the present invention, the clamping mechanism includes a clamping groove 4.3 arranged on the rotating element 4, and a clamping protrusion 4.4 is arranged on the friction element 3, and the friction element 3 is inserted into the rotating element 4 through the clamping protrusion 4.4; based on such a setting, there is a good limiting effect between the friction element 3 and the rotating element 4, which avoids relative rotation between the friction element 3 and the rotating element 4, and ensures the linkage of the movement of the friction element 3 and the rotating element 4.

[0052] Meanwhile, in actual production, the transmission friction part 4.1 is generally produced by injection molding, the rotating element 4 is generally made of PA or other high-strength materials; and the friction element 3 is generally made of composite friction materials.

[0053] Furthermore, in the present invention, the projection of each of the engaging protrusions 4.4 on the friction element 3 is trapezoidal; the engaging protrusion 4.4 with a smaller width is arranged close to the center of the friction element 3; such an arrangement can ensure the smooth movement of the transmission friction member 4.1 and prevent the friction element 3 and the rotating element 4 from being separated under the action of centrifugal force. At the same time, the engaging protrusion 4.4 is designed to have a structure with one end larger and the other end smaller, and also has a good limiting effect, preventing the friction element 3 from moving relative to the rotating element 4.

[0054] In the present invention, the clamping groove 4.3 and the clamping protrusion 4.4 are adapted to each other, are formed identically, and are connected by interference fit.

[0055] Furthermore, in the present invention, the rotating element 4 is provided with an embedded annular groove 4.2 on one side close to the friction element 3; the setting of the embedded annular groove 4.2 facilitates the embedded arrangement of the friction element 3 on the rotating element 4; at the same time, by limiting the inner diameter and outer diameter of the embedded annular groove 4.2, for example, the outer diameter of the embedded annular groove 4.2 is larger than the outer diameter of the rotating element 4; the embedded annular groove 4.2 is coaxially arranged with the rotating element 4; such a setting makes it possible to form a side rib at the edge of the rotating element 4; such a setting, when the friction element 3 is embedded in the rotating element 4, the side rib plays a good limiting role, and during subsequent rotation, it avoids the friction element 3 and the rotating element 4 from being misaligned and offset due to the action of centrifugal force.

[0056] Furthermore, in the present invention, the friction element 3 is connected to the rotating element 4 through a secondary injection molding process; such a configuration facilitates the production of the transmission friction part 4.1 and avoids the assembly process of the friction element 3 and the rotating element 4; at the same time, the friction element 3 is injection molded on the rotating element 4, which ensures the tightness of the connection between the two to a certain extent.

[0057] Furthermore, in the present invention, the screw plug preload 1 is a plastic part; such a configuration enables the screw plug preload 1 to have a certain deformation ability, and can produce a certain ability similar to the effect of traditional elastic components during subsequent use; and pressure is provided to the friction stop mechanism through the elastic-plastic deformation of the entire plastic part.

[0058] Furthermore, in the present invention, the friction stop mechanism includes two stop elements 2; the transmission friction part 4.1 includes two friction elements 3, and the two friction elements 3 are distributed on both sides of the rotating element 4; the two stop elements 2 are distributed on both sides of the transmission friction part 4.1; based on the above design, the present invention enables the two ends of the rotating element 4 to quickly generate a set torque by cooperating with the friction elements 3, thereby improving the response speed of the damper.

[0059] Furthermore, in the present invention, at least three pre-tightening protrusions 1-1 are provided on the screw plug pre-tightening member 1, and the three pre-tightening protrusions 1-1 are evenly distributed along the circumference of the screw plug pre-tightening member 1; by providing a plurality of pre-tightening protrusions 1-1, it is possible to squeeze adjacent anti-rotation elements 2, thereby ensuring the balance of force applied to the anti-rotation elements 2 when being squeezed, and avoiding one side from being lifted up due to excessive force, thereby affecting subsequent friction.

[0060] In actual design, each screw plug preload member 1 is provided with six preload protrusions 1 - 1. Such a number of settings can ensure stable extrusion preload of the friction stop mechanism while maintaining a low production cost.

[0061] In addition, in the present invention, the screw plug preload 1 includes a screw plug body 1-3; a material reduction groove 1-4 is provided on the side of the screw plug body 1-3 away from the friction stop mechanism; the setting of the material reduction groove 1-4 in the present invention has multiple technical effects, one of which is material reduction, which can not only reduce the weight of the screw plug preload 1, but also achieve thinning of the screw plug preload 1 to a certain extent, increase its deformation difficulty, and then facilitate subsequent use. The damper provides pressure through the thin plastic wall thickness of the screw plug preload 1 and the elastic-plastic deformation of the overall plastic part.

[0062] At the same time, in the present invention, an auxiliary assembly groove 1-2 is provided on the inner wall of the material reduction trough 1-4; multiple auxiliary assembly grooves 1-2 are provided on the inner wall of the material reduction trough 1-4, generally four are provided, and multiple auxiliary assembly grooves 1-2 are evenly distributed on the inner wall of the material reduction trough 1-4. Based on such a setting, it is convenient to subsequently control the screw plug preload 1, so that it can be easily rotated and assembled on the outer shell 5.

[0063] Furthermore, in the present invention, the screw plug preload 1 is screwed into the assembly groove 5-2; such a configuration facilitates the assembly of the screw plug preload 1 on the outer shell 5, and a waist-shaped welding hole 5-1 is provided on the outer shell body 5-3; the waist-shaped welding hole 5-1 is connected to the assembly groove 5-2; in the present invention, after the screw plug preload 1 is installed on the outer shell 5 to the set position, the screw plug preload 1 and the outer shell 5 are welded together by ultrasonic welding to keep the torque stable; wherein the symmetrical waist-shaped welding hole 5-1 can adjust the welding position of the screw plug preload 1 with different damper torques; and the waist-shaped welding hole 5-1 also plays a good avoidance role, because the material will deform during welding, and the waist-shaped welding hole 5-1 has a good avoidance effect.

[0064] specific:

[0065] The damper disclosed in the present invention does not have a traditional elastic element, and its components include: a screw plug preload 1, a rotation-stopping element 2, a friction element 3, a rotating element 4 and a housing 5.

[0066] The screw plug preload element 1 squeezes the stacked elements to form pressure, and when the housing 5 is fixed, the rotating element 4 rotates to drive the friction element 3 to generate torque.

[0067] The screw plug preload 1 and the housing 5 are welded together by ultrasonic welding to prevent the screw plug preload 1 from axial loosening; the torque is kept stable; and the friction element 3 and the surface in contact with it are evenly oiled.

[0068] The plug preload 1 squeezes the stacked elements to form pressure. The plug preload 1 is threadedly connected to the housing 5. The thread preload force of the plug preload 1 can be adjusted similar to the elastic element force. The 6 preload protrusions 1-1 of the plug preload 1 press the anti-rotation element 2 to produce elastic-plastic deformation, which can also produce a certain pressing force.

[0069] The four auxiliary assembly grooves 1 - 2 in the inner hole of the screw plug preload member 1 facilitate the application of force to tighten it and assemble it with the housing 5 .

[0070] The screw plug preload 1 and the housing 5 are welded together by ultrasonic welding to keep the torque stable, wherein the symmetrical waist-shaped welding hole 5-1 can adjust the welding position of the screw plug preload 1 for different damper torques.

[0071] When the housing 5 is fixed, the rotating element 4 rotates to drive the friction element 3 to generate torque. The friction element 3 can be an integral structure with the anti-rotation element 2 or the rotating element 4, and the friction element 3 can be made of carbon fiber material or other friction materials.

[0072] The friction element 3 and the surface in contact with it are evenly coated with oil; oil lubrication can reduce the wear and heat of the friction element 3 and reduce the influence of high and low temperatures on the torque of the damper.

[0073] The damper provides pressure through the elastic-plastic deformation of the plastic part of the screw plug preload part 1, which has no less than 3 preload protrusions 1-1; the damper provides pressure through the elastic-plastic deformation of the entire plastic part of the screw plug preload part 1, which has a thin plastic wall.

[0074] The damper disclosed in the present invention has no elastic element, thus reducing the space originally used to install the elastic element and making the overall volume smaller; the damper has a reduced number of parts, a simple structure, a reduced number of parts, convenient assembly and low cost.

[0075] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the protection scope of the present invention.

Claims

1. A damper for an electric strut, characterized in that: It includes a housing and a screw plug pre-tightening member connected to the housing; The housing comprises a housing body; the housing body is provided with an assembly sink; a friction stop mechanism is provided in the assembly sink; The screw plug preload is connected to the friction stop mechanism via a preload component; the preload component comprises a preload protrusion arranged on the screw plug preload; the screw plug preload is pressed against the friction stop mechanism via the preload protrusion.

2. The damper for an electric strut according to claim 1, characterized in that: The friction stop mechanism comprises a transmission friction member and a rotation-stopping element; the transmission friction member and the rotation-stopping element are arranged in close contact with each other.

3. The damper for an electric strut according to claim 1, characterized in that: The transmission friction member comprises a rotating element and a friction element, and the rotating element contacts with the anti-rotation element through the friction element.

4. The damper for an electric strut according to claim 3, characterized in that: The friction element and the anti-rotation element or the rotating element are an integrated structure.

5. The damper for an electric strut according to claim 4, characterized in that: The friction element and the rotating element are an integrated structure; the rotating element is connected to the friction element via a clamping mechanism; the clamping mechanism includes a clamping groove arranged on the rotating element, a clamping protrusion is arranged on the friction element, and the friction element is plugged into the rotating element via the clamping protrusion.

6. A damper for an electric strut according to any one of claims 1 to 5, characterized in that: The screw plug pre-tightening member is a plastic member.

7. A damper for an electric strut according to any one of claims 1 to 5, characterized in that: The friction stop mechanism includes two anti-rotation elements; the transmission friction member includes two friction elements, and the two friction elements are distributed on both sides of the rotating member; the two anti-rotation elements are distributed on both sides of the transmission friction member.

8. A damper for an electric strut according to any one of claims 1 to 5, characterized in that: At least three pre-tightening protrusions are arranged on the screw plug pre-tightening member, and the three pre-tightening protrusions are evenly distributed along the circumference of the screw plug pre-tightening member.

9. A damper for an electric strut according to any one of claims 1 to 5, characterized in that: The screw plug pre-tightening member comprises a screw plug body; a material reduction sinking groove is provided on the side of the screw plug body away from the friction stop mechanism; An auxiliary assembly groove is provided on the inner wall of the material reduction sink.

10. A damper for an electric strut according to any one of claims 1 to 5, characterized in that: The screw plug pre-tightening piece is screwed in the placement sink groove; a waist-shaped welding hole is arranged on the shell body; and the waist-shaped welding hole is communicated with the placement sink groove.

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