Damper for electric supporting rod

Abstract

The utility model relates to the technical field of electric supporting rods, in particular to a damper for an electric supporting rod, which comprises a shell, and a front-end connecting piece, a first elastic piece, a second elastic piece and a rear-end connecting piece which are sequentially arranged in the shell from front to back, and the front-end connecting piece is respectively connected with a screw rod and the front end of the rear-end connecting piece; the rear end of the rear end connecting piece is connected with a speed reducer of the electric supporting rod, the front end connecting piece and the rear end connecting piece are connected through a spline type structure, a locking ring is arranged at the connecting position, the locking ring is arranged on the rear portion of the front end connecting piece in a sleeved mode, and a front installation ring and a rear installation ring are arranged in front of and behind the locking ring respectively. When the front-end connecting piece receives pressure in the direction of the screw, the front-end connecting piece enables the first elastic piece to be compressed, the front and rear mounting rings press the locking ring, rotation of the front-end connecting piece is limited through the locking ring, and rotation damping is provided for the rear-end connecting piece through compression of the second elastic piece. The problem of hovering of the tail gate is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric struts, in particular to a damper used for electric struts. Background Art

[0002] The electric tailgate support rod is the actuator in the electric tailgate system to open or close the tailgate. It is a special component for adjusting the opening of the tailgate. Its function is to ensure that the tailgate can operate smoothly and open and close smoothly. The electric tailgate support rod provides driving force through the motor, drives the screw rod to rotate, guides the support rod to expand and contract, and enables the tailgate to open or close.

[0003] In order to ensure that the tailgate can be in a hovering state when in use, a damper is used. The damper provides a damping torque for the screw rod, increases the internal resistance of the support rod, ensures a good hovering effect, and can also effectively prevent the tailgate from suddenly falling during the switching process between the open and closed states. In an electric tailgate, a motor failure may cause the support rod to be unusable.

[0004] Therefore, it is necessary to design a damping structure suitable for the electric strut. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a damper for an electric strut, which has a simple structure, provides a larger damping range, and facilitates damping adjustment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A damper for an electric strut comprises a shell and a front end connecting piece, a first elastic piece, a second elastic piece and a rear end connecting piece which are arranged in the shell from front to back in sequence, the front end connecting piece being connected to the front ends of a screw rod and a rear end connecting piece respectively, the rear end of the rear end connecting piece being connected to a reducer of the electric strut, the front end connecting piece and the rear end connecting piece being connected by a spline structure and a locking ring being provided at the connection position, the locking ring being sleeved on the rear part of the front end connecting piece and the locking ring and the front end connecting piece being linkedly connected, a front mounting ring and a rear mounting ring being provided in the shell, the front mounting ring and the rear mounting ring being sleeved on the front end connecting piece and the rear end connecting piece respectively, the first elastic piece and the second elastic piece being provided on the front mounting ring and the rear mounting ring respectively.

[0008] Optionally, in an embodiment of the present invention, both the first elastic member and the second elastic member are flat-end-to-top wave spring structures.

[0009] Optionally, in an embodiment of the present invention, the outer walls of the front mounting ring and the rear mounting ring are both provided with protrusions, and correspondingly, the inner wall of the shell is axially provided with a matching sliding groove.

[0010] Optionally, in an embodiment of the utility model, the inner wall of the locking ring is connected to the front end connecting piece by a spline structure, and the locking ring is arranged between the front mounting ring and the rear mounting ring.

[0011] Optionally, in an embodiment of the present invention, an annular mounting groove is provided on the front mounting ring and the rear mounting ring.

[0012] Optionally, in an embodiment of the present invention, the second elastic member is longer than the first elastic member.

[0013] Optionally, in an embodiment of the utility model, the rear end connecting piece is further provided with a fixing ring, and a gasket is provided between the fixing ring and the shell.

[0014] Optionally, in one embodiment of the utility model, a spline connection sleeve is provided at the front of the front connecting piece for connecting the screw rod, and a spline connection head is provided at the rear connecting piece for connecting the reducer.

[0015] Optionally, in an embodiment of the present invention, an assembly groove is axially provided at the rear portion of the front end connecting member and the front portion of the rear end connecting member, and the front end connecting member can achieve a certain axial sliding along the assembly groove.

[0016] Beneficial effects of the utility model

[0017] The damper for the electric strut of the utility model has a compact structure and a relatively simple design, and can provide two-stage damping. The internal elastic parts can be replaced as needed so that the damper has different damping coefficients, thereby making the electric strut safer to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 Schematic diagram of the internal structure of the damper of Example 1 of the utility model;

[0020] Explanation of the accompanying drawings: shell 1, front end connecting part 2, spline connecting sleeve 201, rear end connecting part 3, spline connecting head 301, limiting ring 4, gasket 6, front mounting ring 7, rear mounting ring 8, first elastic part 9, second elastic part 10, locking ring 11, fixing ring 12. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments. Example 1

[0022] In order to make the tailgate hover and to ensure normal use of the tailgate in the event of a motor failure, a strut damper with a larger damping adjustable range is designed. The specific solution is as follows:

[0023] like Figure 1 As shown, a damper for an electric strut comprises a shell 1 and a front end connector 2, a first elastic member 9, a second elastic member 10 and a rear end connector 3 which are arranged in the shell 1 from front to back, the front end connector 2 is connected to the front ends of the screw rod and the rear end connector 3 respectively, the rear end of the rear end connector 3 is connected to the reducer of the electric strut, the front end connector 2 and the rear end connector 3 are connected by a spline structure and a locking ring 11 is provided at the connection position, the locking ring 11 is sleeved on the rear part of the front end connector 2 and the locking ring 11 and the front end connector 2 are linked, a front mounting ring 7 and a rear mounting ring 8 are provided in the shell 1, the front mounting ring 7 and the rear mounting ring 8 are sleeved on the front end connector 2 and the rear end connector 3 respectively, the first elastic member 9 and the second elastic member 10 are provided on the front mounting ring 7 and the rear mounting ring 8 respectively.

[0024] In this embodiment, the outer wall of the shell 1 is provided with an outwardly protruding limit strip for assembling the shell 1 in the outer shell of the electric support rod. Accordingly, a matching limit groove is provided in the outer shell of the support rod to control the shell 1 from rotating.

[0025] Internal threads are provided at the front and rear ends of the shell 1, and limiting rings 4 are provided at the front and rear ends of the shell 1. The inner wall of the limiting ring 4 is screwed to the front connecting piece 2 and the rear connecting piece 3, which can be used to adjust the stroke of the first elastic piece 9 and the second elastic piece 10, and is also used to limit the front mounting ring 7 and the rear mounting ring 8. The outward end of the limiting ring 4 is provided with an external hexagonal structure, which is convenient for screwing into the two ends of the shell 1.

[0026] The first elastic member 9 and the second elastic member 10 are both flat-end-to-top wave spring structures.

[0027] Compared with traditional coil springs, the axial length of the top-to-top wave spring is relatively short, which can make the structure more compact and reduce the volume of the damper.

[0028] The outer walls of the front mounting ring 7 and the rear mounting ring 8 are both provided with protrusions, and correspondingly, the inner wall of the housing 1 is provided with matching sliding grooves along the axial direction.

[0029] The front mounting ring 7 and the rear mounting ring 8 can slide axially along the slide groove when subjected to pressure, and are restricted by the slide groove so that the front mounting ring 7 and the rear mounting ring 8 will not rotate.

[0030] The inner wall of the locking ring 11 is connected to the front end connecting piece 2 by a spline structure. The locking ring 11 is arranged between the front mounting ring 7 and the rear mounting ring 8. The rotation of the front end connecting piece 2 will drive the rotation of the locking ring 11. Therefore, clamping the locking ring 11 can limit the rotation of the front end connecting piece 2 and provide rotation damping.

[0031] Both the front mounting ring 7 and the rear mounting ring 8 are provided with an annular mounting groove, and the mounting groove is used to limit the two ends of the first elastic member 9 and the second elastic member 10 to ensure that the positions of the first elastic member 9 and the second elastic member 10 are not offset.

[0032] Both the front mounting ring 7 and the rear mounting ring 8 include a front ring and a rear ring, and mounting grooves are provided on the inner sides of the front ring and the rear ring. Both ends of the first elastic member 9 are respectively arranged in the mounting grooves of the front mounting ring 7, and both ends of the second elastic member 10 are respectively arranged in the mounting grooves of the front mounting ring 7 and the rear mounting ring 8.

[0033] The second elastic member 10 is longer than the first elastic member 9 to provide greater rotational damping to ensure safe use of the tailgate. When the damping of the locking ring 11 is not sufficient to limit the tailgate, the fixing ring 12 can provide further greater damping to prevent the tailgate from floating. When the first elastic member 9 has a certain attenuation, the second elastic member 10 can also be used to ensure normal use.

[0034] The damping can be varied by replacing elastic members with different elastic forces.

[0035] The rear end connector 3 is also provided with a fixing ring 12, and a gasket 6 is provided between the fixing ring 12 and the shell 1. The gasket 6 is provided to reduce the wear of the shell 1. The fixing ring 12 is clamped by the gasket 6 and the rear mounting ring 8 to provide more damping. The structure and connection structure of the fixing ring 12 are the same as those of the locking ring 11.

[0036] The front part of the front connecting piece 2 is provided with a spline connecting sleeve 201 for connecting the screw rod, and the rear connecting piece 3 is provided with a spline connecting head 301 for connecting the reducer.

[0037] The rear part of the front end connecting member 2 and the front part of the rear end connecting member 3 are provided with assembly grooves along the axial direction, and the front end connecting member 2 can achieve a certain axial sliding along the assembly grooves.

[0038] principle:

[0039] When the front-end connecting member 2 is subjected to pressure, the first elastic member 9 is compressed, and the locking ring 11 is clamped through the front mounting ring 7 and the rear mounting ring 8, thereby providing a certain damping for the front-end connecting member 2. When the pressure is too high, the locking ring 11 compresses the second elastic member 10, and the fixing ring 12 is clamped through the rear mounting ring 8 and the gasket 6, thereby providing greater damping. Example 2

[0040] In this embodiment, the structure of the damper is basically the same as that of Example 1, with the difference that the front mounting ring 7 and the rear mounting ring 8 are fixed, the front part of the rear end connecting member 3 can slide forward and backward, the locking ring 11, the fixing ring 12 and the gasket 6 are cancelled, and the internal first elastic member 9 and the second elastic member 10 adopt a radially shrinkable elastic structure, the elastic structure includes an arc-shaped pressing plate that fits the outer wall of the front end connecting member 2 and the rear end connecting member 3, and the elastic structure is also provided with a corrugated structure toward the center of the circle, one end of the corrugated structure is connected to the pressing plate, and the corrugated structure is deformed so that the pressing plate applies pressure to the outer wall of the front end connecting member 2 and the rear end connecting member 3, thereby providing damping.

[0041] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A damper for an electric strut, characterized in that: It includes a shell and a front end connecting piece, a first elastic piece, a second elastic piece and a rear end connecting piece which are arranged in the shell from front to back, the front end connecting piece is respectively connected to the front ends of the screw rod and the rear end connecting piece, the rear end of the rear end connecting piece is connected to the reducer of the electric strut, the front end connecting piece and the rear end connecting piece are connected by a spline structure and a locking ring is provided at the connecting position, the locking ring is sleeved on the rear part of the front end connecting piece and the locking ring and the front end connecting piece are linked, a front mounting ring and a rear mounting ring are provided in the shell, the front mounting ring and the rear mounting ring are respectively sleeved on the front end connecting piece and the rear end connecting piece, the first elastic piece and the second elastic piece are respectively provided on the front mounting ring and the rear mounting ring.

2. A damper for an electric strut according to claim 1, characterized in that: The first elastic member and the second elastic member are both flat-end-to-top wave spring structures.

3. A damper for an electric strut according to claim 1, characterized in that: The outer walls of the front mounting ring and the rear mounting ring are both provided with protrusions, and correspondingly, the inner wall of the shell is provided with a matching sliding groove along the axial direction.

4. A damper for an electric strut according to claim 1, characterized in that: The inner wall of the locking ring is connected to the front end connecting piece by a spline structure, and the locking ring is arranged between the front mounting ring and the rear mounting ring.

5. A damper for an electric strut according to claim 1, characterized in that: The front mounting ring and the rear mounting ring are both provided with an annular mounting groove.

6. A damper for an electric strut according to claim 1, characterized in that: The second elastic member is longer than the first elastic member.

7. A damper for an electric strut according to claim 1, characterized in that: The rear end connecting piece is also provided with a fixing ring, and a gasket is provided between the fixing ring and the shell.

8. A damper for an electric strut according to claim 1, characterized in that: The front part of the front connecting piece is provided with a spline connecting sleeve for connecting the screw rod, and the rear connecting piece is provided with a spline connecting head for connecting the reducer.

9. A damper for an electric strut according to claim 1, characterized in that: The rear part of the front end connecting piece and the front part of the rear end connecting piece are provided with assembly grooves along the axial direction, and the front end connecting piece can realize a certain axial sliding along the assembly grooves.

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