Electric struts and cars

Abstract

The present invention relates to an electric strut and a car. The electric strut includes an outer sleeve, the inner circumference of the outer sleeve is provided with a partition portion; a drive assembly, the drive assembly is arranged in the outer sleeve, the drive assembly includes an outer guide tube, an inner guide tube, a screw, a damper and a motor, the inner guide tube is threadedly matched with the screw, the outer guide tube is sleeved on the periphery of the inner guide tube, one end of the outer guide tube is provided with a connecting seat, one side of the connecting seat is limitedly abutted with the partition portion, the damper and the motor are arranged on the other side of the connecting seat, the end of the screw is transmission-connected to the damper and the motor, the connecting seat and the damper are both limitedly matched with the inner circumference of the outer sleeve by a rotation-stop structure; and a first fixed head, the first fixed head includes an outer wall and an inner wall that are opposite and spaced apart, a groove for inserting the end of the outer sleeve is formed between the inner wall and the outer wall, and the outer wall is welded and fixed to the outer sleeve. The electric strut of the present invention has a simple structure, is easy to assemble, and has low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, in particular to an electric strut and an automobile. Background Art

[0002] Currently, electric struts are widely used in the automotive industry. By driving the tailgate, they can automatically open and close the tailgate, greatly improving the convenience of car use. Traditional electric struts typically include components such as an outer sleeve, an inner sleeve, a drive assembly, and a fixed head. The drive assembly includes multiple components such as an outer tube, an inner tube, a screw, a damper, and a motor. When assembling an electric strut, there are generally two methods for assembling the outer sleeve with the drive assembly and fixed head. One method is pressure point assembly, which requires adding a riveted iron pipe inside the outer sleeve. This is costly, and the pressure point position is inaccurate, making it difficult to ensure concentricity between the parts after riveting. The other method is laser welding, which requires the use of laser-transparent materials in the corresponding areas of the outer sleeve and the internal parts. A good weld requires interference fit between the internal parts and the outer sleeve. Excessive interference is not conducive to part assembly and requires high dimensional tolerances, which in turn increases the cost. Therefore, traditional electric struts have problems such as difficult assembly and high production costs. Summary of the Invention

[0003] Based on this, it is necessary to provide an electric strut and a car to address the problems of difficult assembly and high production cost of traditional electric struts. The electric strut has a simple structure, is easy to assemble and has a low cost.

[0004] An electric support rod, comprising:

[0005] an outer sleeve, wherein the inner circumferential surface of the outer sleeve is provided with a partition portion;

[0006] A drive assembly, wherein the drive assembly is arranged in the outer sleeve, the drive assembly comprises an outer tube, an inner tube, a screw, a damper and a motor, the inner tube is threadedly matched with the screw, the outer tube is sleeved on the periphery of the inner tube, one end of the outer tube is provided with a connecting seat, one side of the connecting seat is in limited abutment with the partition part, the damper and the motor are arranged on the other side of the connecting seat, the end of the screw is transmission-connected with the damper and the motor, and the connecting seat and the damper are both limitedly matched with the inner circumference of the outer sleeve by a rotation-stop structure; and

[0007] The first fixing head comprises an outer wall and an inner wall which are opposite to each other and spaced apart, a groove for inserting the end of the outer sleeve is formed between the inner wall and the outer wall, and the outer wall is fixed to the outer sleeve by welding.

[0008] When assembling the above-mentioned electric strut, after the drive assembly is assembled into the outer sleeve, the connecting seat of the outer tube and the damper are limited by the anti-rotation structure between the outer tube, which can prevent the outer tube and the damper from rotating relative to the outer tube to ensure concentricity. The axial movement of the outer tube, the damper and the motor can be limited by the cooperation of the partition part and the first fixed head, so that the rotational power of the motor can be well transmitted to the screw, and then the inner tube can be driven to move linearly along the screw, so that the inner tube can perform axial telescopic movement relative to the outer tube. Among them, when the first fixed head is assembled with the outer tube, the end of the outer tube where the motor is installed is inserted into the groove on the fixed head, and then the outer wall of the first fixed head is welded and fixed to the outer tube by laser welding. The process is simple and the connection is reliable. Compared to traditional pressure point assembly, the electric strut of the present invention does not require the additional installation of riveted iron pipes, and there is no risk of inaccurate pressure point positioning. Compared to traditional laser welding assembly, the outer sleeve needs to be made of laser-transparent material. The electric strut of the present invention only needs to set at least the outer wall portion of the upper fixing head to be laser-transparent material to achieve welding with the outer sleeve. The proportion of laser-transparent material used is relatively small, which can effectively save costs. In addition, the dimensional tolerance requirements for other parts assembled into the outer sleeve do not need to be too high, which can effectively simplify the assembly process and further reduce production costs. Therefore, the electric strut of the present invention has a simple structure, is easy to assemble, and has a low cost.

[0009] In one embodiment, a positioning step is provided on the outer peripheral surface of the end of the outer sleeve, and the end surface of the outer wall abuts against the positioning step.

[0010] In one embodiment, the damper includes a shell, a damper body and an end cover, the damper body is arranged in an installation cavity formed by the shell and the end cover, the motor is connected to the end cover, and the corresponding positions of the outer circumferences of the connecting seat, the shell and the end cover are respectively provided with anti-rotation grooves, and the inner circumference of the outer sleeve is provided with anti-rotation ribs extending along the axial direction, and the anti-rotation ribs pass through each of the anti-rotation grooves in turn and cooperate with the anti-rotation grooves to limit the position.

[0011] In one embodiment, the inner circumferential surface of the outer sleeve is provided with a plurality of the anti-rotation ribs at intervals along the circumferential direction, and the outer circumferential surfaces of the connecting seat, the outer shell and the end cover are respectively provided with a plurality of the anti-rotation grooves, and the number of the anti-rotation ribs matches and corresponds one to one to the number of the anti-rotation grooves.

[0012] In one embodiment, a positioning groove is provided on a side of the inner wall opposite to the outer wall, and the anti-rotation rib extends into the positioning groove.

[0013] In one embodiment, the outer circumferences of the connecting seat, the outer shell and the end cover are respectively provided with protrusions, and the protrusions are in interference fit with the inner circumference of the outer sleeve.

[0014] In one embodiment, the side of the protrusion that cooperates with the outer sleeve is arranged in an arc shape.

[0015] In one embodiment, the outer circumferential surfaces of the connecting seat, the outer shell and the end cover are respectively provided with a plurality of protrusions along the circumferential direction.

[0016] In one embodiment, the end cover is connected to the motor via a first shock-absorbing rubber, a second shock-absorbing rubber is provided between the motor and the first fixing head, and the first fixing head and the second shock-absorbing rubber are interfered with to limit the axial displacement of the motor.

[0017] The present application also proposes a car comprising the electric strut as described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of an electric support rod according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the electric strut;

[0022] Figure 3 for Figure 2 Schematic diagram of the partial cooperation between the driving assembly of the electric strut and the first fixed head;

[0023] Figure 4 for Figure 3 A cross-sectional diagram of the drive assembly and the first fixed head after being assembled with the outer sleeve;

[0024] Figure 5 for Figure 1 A schematic structural diagram of the outer sleeve of the electric strut;

[0025] Figure 6 for Figure 1 A schematic structural diagram of the first fixed head of the electric strut;

[0026] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the first fixed head.

[0027] 10. Outer sleeve; 11. Positioning step; 12. Anti-rotation rib; 13. Partition; 20. Inner sleeve; 301. Anti-rotation groove; 302. Protrusion; 31. Outer conduit; 311. Connecting seat; 32. Inner conduit; 33. Screw; 34. Damper; 341. Outer shell; 342. Damper body; 343. End cover; 35. Motor; 36. First shock-absorbing rubber; 37. Second shock-absorbing rubber; 40. First fixing head; 41. Outer wall; 42. Inner wall; 421. Positioning groove; 43. Groove; 50. Second fixing head; 60. Compression spring; 70. Waterproof gasket. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0029] It should be noted that when an element is referred to as being "fixed on", "mounted on" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. If there are directional indications (such as up, down, left, right, front, back, horizontal, vertical...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] As used herein, the term "and / or" includes any and all combinations of one or more of the listed items. The terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" herein do not represent specific quantities or sequences but are merely used to distinguish names. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the art to which the present invention pertains. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] The present invention provides an electric support rod.

[0033] In the embodiment of the present invention, Figure 1 and Figure 2 As shown, the electric support rod includes an outer sleeve 10, an inner sleeve 20, a drive assembly, a first fixing head 40, a second fixing head 50 and a compression spring 60. Figure 4 As shown, the inner circumference of the outer sleeve 10 is provided with a partition portion 13; the driving assembly is arranged in the outer sleeve 10, and the driving assembly includes an outer tube 31, an inner tube 32, a screw 33, a damper 34 and a motor 35. The inner tube 32 is threadedly matched with the screw 33, and the outer tube 31 is sleeved on the periphery of the inner tube 32. One end of the outer tube 31 is provided with a connecting seat 311, and one side of the connecting seat 311 is limitedly abutted against the partition portion 13. The damper 34 and the motor 35 are sequentially arranged on the other side of the connecting seat 311, and the end of the screw 33 is sequentially connected to the damper 34 and the motor 35 for transmission. The connecting seat 311 and the damper 34 are both limitedly matched with the inner circumference of the outer sleeve 10 by a rotation-stop structure; as shown Figure 6 and Figure 7 As shown, the first fixing head 40 includes an outer wall 41 and an inner wall 42 that are opposite and spaced apart. A groove 43 for inserting the end of the outer sleeve 10 is formed between the inner wall 42 and the outer wall 41. The outer wall 41 is fixed to the outer sleeve 10 by welding.

[0034] Specifically, if Figure 4 As shown, a partition 13 is provided in the middle of the inner circumference of the outer sleeve 10, dividing the outer sleeve 10 into a first tube section and a second tube section. Optionally, the partition 13 is an annular structure extending along the inner circumference of the outer sleeve 10. During assembly, the screw 33 is threadedly connected to the inner tube 32 and assembled into the outer tube 31. The outer tube 31 is then assembled into the outer sleeve 10, with the connecting seat 311 of the outer tube 31 abutting against the partition 13. The damper 34 and motor 35 are then installed into the outer sleeve 10. The end of the screw 33 can be connected to the damper 34 and motor 35 via a spline drive. The first fixing head 40 is then connected to the end of the outer sleeve 10, thus completing the assembly between the outer sleeve 10, the drive assembly, and the first fixing head 40. The connecting seat 311, damper 34, and motor 35 are all installed in the first tube section of the outer sleeve 10. Then the compression spring 60 is assembled into the second tube section of the outer sleeve 10. The compression spring 60 is sleeved on the outer periphery of the outer guide tube 31. One end of the compression spring 60 elastically abuts against the partition part 13. The inner sleeve 20 can be axially slidably installed between the compression spring 60 and the outer sleeve 10. The other end of the compression spring 60 is installed in the inner sleeve 20. The inner sleeve 20 is connected and fixed to the inner guide tube 32. The second fixed head 50 is connected to the end of the inner guide tube 32 away from the first fixed head 40. At this point, the assembly of the entire electric strut is completed.

[0035] At least the outer wall 41 of the first fixing head 40 is made of a laser-transparent material, and the outer wall 41 can be welded and fused to the outer sleeve 10 through a laser welding process. Of course, to simplify the production process of the first fixing head 40, the entire first fixing head 40 can be made of a laser-transparent material. In addition, to ensure that the end of the outer sleeve 10 can be quickly inserted into the groove 43 of the first fixing head 40, the outer peripheral edge of the end of the outer sleeve 10 can optionally be chamfered.

[0036] When the electric strut is applied to a vehicle tailgate, the first fixing head 40 is mounted on the tailgate's mounting base, and the second fixing head 50 is mounted on the vehicle body's mounting base. The motor 35 drives the screw 33 to rotate, thereby driving the inner tube 32 to move linearly along the screw 33. The inner tube 32 drives the inner sleeve 20 to extend and retract linearly relative to the outer sleeve 10, thereby enabling the tailgate to be opened and closed. Optionally, the outer sleeve 20 has a plurality of axially extending guide ribs on its outer circumference, and the outer sleeve 10 has guide grooves on its inner circumference that cooperate with the guide ribs. The cooperation between the guide ribs and the guide grooves ensures that the inner sleeve 20 can slide smoothly relative to the outer sleeve 10. Optionally, the motor 35 is a reduction motor 35 equipped with a reduction gearbox. The reduction motor 35, the damper 34, and the compression spring 60 cooperate to achieve hovering of the tailgate. Optionally, a waterproof gasket 70 is provided between the connecting seat 311 and the partition portion 13 to provide waterproofing. Optionally, the first fixing head 40 is provided with a threading hole for the control wire of the power supply 35 to pass through. The threading hole is covered with a corrugated tube to further enhance waterproofing. It should be noted that the above-mentioned electric strut can be applied not only to automobile tailgates, but also to other automatically opening and closing doors or windows, all of which are within the scope of protection of this application.

[0037] In addition, it should be noted that the anti-rotation structure herein can be provided with an anti-rotation rib 12 on the inner circumference of the outer sleeve 10 and an anti-rotation groove 301 on the outer circumference of the connecting seat 311 and the damper 34; or alternatively, the anti-rotation groove 301 can be provided on the inner circumference of the outer sleeve 10 and the anti-rotation rib 12 can be provided on the outer circumference of the connecting seat 311 and the damper 34. Any structure can be used as long as it can prevent the connecting seat 311 and the damper 34 from rotating relative to the outer sleeve 10.

[0038] When the electric strut is assembled, after the drive assembly is assembled into the outer sleeve 10, the connection seat 311 of the outer tube 31 and the damper 34 are both limited by the anti-rotation structure with the outer tube 10, which can prevent the outer tube 31 and the damper 34 from rotating relative to the outer tube 10 to ensure concentricity. The partition 13 and the first fixed head 40 cooperate to limit the axial movement of the outer tube 31, the damper 34 and the motor 35, so that the rotational power of the motor 35 can be well transmitted to the screw 33, and then the inner tube 32 can be driven to move linearly along the screw 33, so that the inner tube 32 can perform axial telescopic movement relative to the outer tube 31. When the first fixed head 40 is assembled with the outer tube 10, the end of the outer tube 10 equipped with the motor 35 is inserted into the groove 43 on the fixed head, and then the outer wall 41 of the first fixed head 40 is welded to the outer tube 10 by laser welding. The process is simple and the connection is reliable. Compared to traditional pressure point assembly, the electric strut of the present invention does not require additional riveted iron pipes, and there is no risk of inaccurate pressure point positions. Compared to traditional laser welding assembly, the outer sleeve 10 needs to be made of laser-transparent material. The electric strut of the present invention only needs to set at least the outer wall 41 of the upper fixing head to be laser-transparent material to achieve welding with the outer sleeve 10. The proportion of laser-transparent material used is relatively small, which can effectively save costs. In addition, the dimensional tolerance requirements for other parts assembled into the outer sleeve 10 do not need to be too high, which can effectively simplify the assembly process and further reduce production costs. Therefore, the electric strut of the present invention has a simple structure, is easy to assemble, and has a low cost.

[0039] Furthermore, a positioning step 11 is provided on the outer peripheral surface of the end of the outer sleeve 10, and the end surface of the outer wall 41 abuts against the positioning step 11. Specifically, Figure 5 As shown, the outer sleeve 10 includes a main body and a welding portion provided at one end of the main body. The outer diameter of the welding portion is smaller than that of the main body. A positioning step 11 is formed on the end surface of the main body near the welding portion. After the first fixing head 40 is assembled to the outer sleeve 10, the end surface of the outer wall 41 of the first fixing head 40 abuts and cooperates with the positioning step 11, thereby limiting the position of the first fixing head 40. Optionally, when the first fixing head 40 and the outer sleeve 10 are assembled, the outer wall 41 of the first fixing head 40 is substantially flush with the main body of the outer sleeve 10, thereby ensuring the overall aesthetics of the product.

[0040] Please refer to Figures 3 to 5In one embodiment, the damper 34 includes a housing 341, a damper body 342, and an end cap 343. The damper body 342 is disposed within a mounting cavity formed by the housing 341 and the end cap 343. The motor 35 is connected to the end cap 343. Anti-rotation grooves 301 are provided at corresponding positions on the outer circumferences of the connecting seat 311, the housing 341, and the end cap 343. The inner circumference of the outer sleeve 10 is provided with axially extending anti-rotation ribs 12. The anti-rotation ribs 12 sequentially pass through each anti-rotation groove 301 and engage with the anti-rotation grooves 301. Specifically, the damper body 342 can be assembled into the housing 341 after the shock-absorbing rubber is assembled, and the end cap 343 covers the open end of the housing 341. When assembling the outer tube 10, the anti-rotation grooves 301 on the connecting base 311, outer shell 341, and end cap 343 are aligned with the anti-rotation ribs 12 in the outer tube 10, and then the outer tube 10 is pushed along the anti-rotation ribs 12. This makes assembly simple and convenient. Furthermore, the outer tube 31, outer shell 341, and end cap 343 are connected in series via the same anti-rotation rib 12, which effectively ensures the concentricity of the components and improves product performance.

[0041] Furthermore, if Figure 5 As shown, the inner circumferential surface of the outer sleeve 10 is provided with a plurality of anti-rotation ribs 12 at intervals along the circumference, and the outer circumferential surfaces of the connecting seat 311, the outer shell 341 and the end cover 343 are respectively provided with a plurality of anti-rotation grooves 301. The number of anti-rotation ribs 12 and the anti-rotation grooves 301 are adapted and correspond one to one. By limiting the fit of the plurality of anti-rotation ribs 12 and the plurality of anti-rotation grooves 301 in a one-to-one correspondence, the reliability of the limit fit can be further guaranteed, thereby further ensuring the concentricity between the various components. For example, in this embodiment, the inner circumferential surface of the outer sleeve 10 is evenly and circumferentially spaced and provided with four anti-rotation ribs 12 extending in the axial direction. Correspondingly, four anti-rotation grooves 301 are respectively provided on the connecting seat 311, the outer shell 341 and the end cover 343.

[0042] Furthermore, if Figure 6 As shown, a positioning groove 421 is provided on the side of the inner wall 42 opposite the outer wall 41, and the anti-rotation rib 12 on the outer sleeve 10 extends into the positioning groove 421. The anti-rotation rib 12 cooperates with the positioning groove 421 to position the first fixing head 40 on the outer sleeve 10, facilitating subsequent welding operations. The number of positioning grooves 421 and anti-rotation rib 12 is adapted and corresponds one-to-one. For example, in this embodiment, four anti-rotation ribs 12 are evenly spaced on the inner circumference of the outer sleeve 10, and accordingly, four positioning grooves 421 are provided on the inner wall 42 along the circumference.

[0043] It is understandable that in order to ensure that the connecting seat 311, the outer shell 341 and the end cover 343 can be smoothly assembled into the outer sleeve 10, a clearance fit is adopted between the outer circumference of the connecting seat 311, the outer shell 341 and the end cover 343 and the inner circumference of the outer sleeve 10, and there is a certain assembly margin.

[0044] For further information, please refer to Figure 3 The outer circumferences of the connector 311, the outer shell 341, and the end cap 343 are each provided with a protrusion 302, which interferes with the inner circumference of the outer sleeve 10. When the connector 311, the outer shell 341, and the end cap 343 are assembled into the outer sleeve 10, the interference fit between the protrusion 302 and the inner circumference of the outer sleeve 10 further ensures the concentricity between the connector 311 (outer conduit 31), the outer shell 341, and the end cap 343.

[0045] Optionally, the side of the protrusion 302 that matches the outer sleeve 10 is arranged in an arc shape. The protrusion 302 is arranged in an arc shape so that the interference area between it and the outer sleeve 10 is small, the insertion resistance is also small, and it will not affect the assembly. Figure 3 As shown, the protrusion 302 is in the form of a strip extending axially along the outer sleeve 10, and the outer edge of the cross-section of the protrusion 302 is configured in an arc shape. Of course, in other embodiments, the protrusion 302 can also be configured as an arc-shaped protrusion. Optionally, the outer periphery of the connecting seat 311, the outer shell 341, and the end cover 343 are all provided with multiple protrusions 302 spaced circumferentially.

[0046] For further information, please refer to Figure 3 and Figure 4 The end cover 343 is connected to the motor 35 through the first shock-absorbing rubber 36. A second shock-absorbing rubber 37 is provided between the motor 35 and the first fixing head 40. The first fixing head 40 and the second shock-absorbing rubber 37 are interfered with to limit the axial displacement of the motor 35. Specifically, one side of the first shock-absorbing rubber 36 and the end cover 343 can be plugged in and matched through a concave-convex structure, and the other side of the first shock-absorbing rubber 36 and the reduction box of the motor 35 can also be plugged in and matched through a concave-convex structure, thereby realizing the connection between the damper 34 and the motor 35. The second shock-absorbing rubber 37 is then pressed onto the side of the motor 35 away from the damper 34. The first fixing head 40 and the second shock-absorbing rubber 37 are interfered with, so that the damper 34 and the motor 35 can be stably installed in the outer sleeve 10 to avoid axial movement. By providing the first shock-absorbing rubber 36 and the second shock-absorbing rubber 37, a good shock-absorbing effect can be achieved, thereby ensuring the stable performance of the electric strut. Optionally, corresponding locations on the first shock-absorbing rubber 36 and the second shock-absorbing rubber 37 are also provided with anti-rotation grooves 301 and protrusions 302 .

[0047] The present invention also proposes a car, which includes an electric strut as described in any of the above embodiments. The specific structure of the electric strut refers to the above embodiments. Since this car adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0048] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An electric support rod, characterized in that: include: an outer sleeve, wherein the inner circumferential surface of the outer sleeve is provided with a partition portion; A drive assembly, wherein the drive assembly is arranged in the outer sleeve, the drive assembly comprises an outer tube, an inner tube, a screw, a damper and a motor, the inner tube is threadedly matched with the screw, the outer tube is sleeved on the periphery of the inner tube, one end of the outer tube is provided with a connecting seat, one side of the connecting seat is in limited abutment with the partition part, the damper and the motor are arranged on the other side of the connecting seat, the end of the screw is transmission-connected with the damper and the motor, and the connecting seat and the damper are both limitedly matched with the inner circumference of the outer sleeve by a rotation-stop structure; and a first fixing head, the first fixing head comprising an outer wall and an inner wall opposite to each other and spaced apart, a groove formed between the inner wall and the outer wall for inserting the end of the outer sleeve, the outer wall being welded and fixed to the outer sleeve; at least the outer wall of the first fixing head being made of a laser-transmitting material; The damper includes an outer shell, a damper body and an end cover. The damper body is arranged in an installation cavity formed by the outer shell and the end cover. The motor is connected to the end cover. The corresponding positions of the outer circumferences of the connecting seat, the outer shell and the end cover are respectively provided with anti-rotation grooves. The inner circumference of the outer sleeve is provided with anti-rotation ribs extending along the axial direction. The anti-rotation ribs pass through each of the anti-rotation grooves in turn and cooperate with the anti-rotation grooves to limit the position.

2. The electric strut according to claim 1, characterized in that The outer peripheral surface of the end portion of the outer sleeve is provided with a positioning step, and the end surface of the outer wall is in abutment with the positioning step.

3. The electric strut according to claim 1, characterized in that The inner circumferential surface of the outer sleeve is provided with a plurality of anti-rotation ribs at intervals along the circumferential direction, and the outer circumferential surfaces of the connecting seat, the outer shell and the end cover are respectively provided with a plurality of anti-rotation grooves, and the number of the anti-rotation ribs and the anti-rotation grooves are adapted and correspond one to one.

4. The electric strut according to claim 1, characterized in that A positioning groove is provided on a surface of the inner wall opposite to the outer wall, and the anti-rotation rib extends into the positioning groove.

5. The electric strut according to claim 1, characterized in that: The outer circumferences of the connecting seat, the outer shell and the end cover are respectively provided with convex parts, and the convex parts are interference-fitted with the inner circumference of the outer sleeve.

6. The electric strut according to claim 5, characterized in that: The side of the protrusion that matches the outer sleeve is arranged in an arc shape.

7. The electric strut according to claim 5, characterized in that: The outer circumferential surfaces of the connecting seat, the outer shell and the end cover are respectively provided with a plurality of the protrusions along the circumferential direction.

8. The electric strut according to any one of claims 1 to 7, characterized in that: The end cover is connected to the motor via a first shock-absorbing rubber. A second shock-absorbing rubber is provided between the motor and the first fixing head. The first fixing head and the second shock-absorbing rubber are interfered with each other to limit the axial displacement of the motor.

9. An automobile, characterized in that: Comprising the electric strut according to any one of claims 1 to 8.

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