Electric supporting rod and vehicle

Abstract

The utility model discloses an electric supporting rod and a vehicle. The electric supporting rod comprises a motor assembly, a screw assembly, a nut assembly, a telescopic inner sleeve, a first connector, a first outer sleeve, a second connector and a second outer sleeve, the screw assembly is in driving connection with the motor assembly, the nut assembly is in threaded connection with the screw assembly, the telescopic inner sleeve is in driving connection with the nut assembly, one end of the first connector is fixed to the telescopic inner sleeve, and the other end of the first connector is fixed to the second outer sleeve. The other end of the first connector is in spherical hinge connection with one of the vehicle tail and the vehicle tail door, the motor assembly is sleeved with the first outer sleeve, one end of the second connector is fixed to one end of the first outer sleeve, the other end of the second connector is in spherical hinge connection with the other one of the vehicle tail and the vehicle tail door, and the telescopic inner sleeve is sleeved with the second outer sleeve; one end of the second outer sleeve is fixed to the other end of the first outer sleeve. In this way, the electric supporting rod is easy to inject, assemble and control the laser welding quality, and therefore the waterproof and dustproof performance is improved.

Description

Technical Field

[0001] The present application relates to the field of motor vehicle accessories, and in particular to an electric strut and a vehicle. Background Art

[0002] With the development of intelligent and comfortable opening and closing of automobile tailgates, electric struts are widely used in automobile tailgates due to their compact structure and stable performance. Existing electric struts are generally two-stage inner and outer sleeves, among which the single-stage outer sleeve is particularly long. Therefore, existing electric struts have problems such as difficult quality control of injection molding, assembly, and laser welding, and poor waterproof and dustproof performance. Utility Model Content

[0003] The present application provides an electric strut and a vehicle, which can solve the problems of difficult quality control of injection molding, assembly, and laser welding and poor waterproof and dustproof performance of electric struts in the prior art.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide an electric strut, the electric strut comprising: a motor assembly; a screw assembly, drivingly connected to the motor assembly; a nut assembly, threadedly connected to the screw assembly; a telescopic inner sleeve, drivingly connected to the nut assembly; a first connecting head, one end of which is fixed to the telescopic inner sleeve, and the other end is ball-jointed with one of the rear end of the vehicle and the tailgate of the vehicle; a first outer sleeve, which is sleeved on the motor assembly; a second connecting head, one end of which is fixed to one end of the first outer sleeve, and the other end is ball-jointed with the other of the rear end of the vehicle and the tailgate of the vehicle; a second outer sleeve, which is sleeved on the telescopic inner sleeve and one end of the second outer sleeve is fixed to the other end of the first outer sleeve; wherein the telescopic inner sleeve can be extended or retracted relative to the second outer sleeve, thereby driving the tailgate of the vehicle to open or close relative to the rear end of the vehicle.

[0005] In one embodiment, one end of the second connector is inserted into one end of the first outer sleeve, and one end of the second connector is connected to the first outer sleeve by laser welding.

[0006] In one embodiment, a plug is provided at one end of the second connector, a socket is provided at one end of the motor assembly facing the second connector, and the plug is plugged into the socket.

[0007] In one embodiment, the other end of the first outer sleeve extends radially inward to form a first connection portion, and one end of the second outer sleeve extends radially inward to form a second connection portion, and the second connection portion is fixed to the first connection portion.

[0008] In one embodiment, the electric support rod also includes a guide tube, which is sleeved on the nut assembly, one end of the guide tube passes through the second connecting part and the first connecting part, and the second outer sleeve is also provided with a sealing part, which is arranged between the second connecting part and the guide tube.

[0009] In one embodiment, the electric support rod further includes a guide tube, which is sleeved on the nut assembly, one end of the guide tube is inserted into the other end of the first outer sleeve, and one end of the guide tube is connected to the first outer sleeve by laser welding.

[0010] In one embodiment, the electric support rod also includes a guide tube and a coil spring, wherein the guide tube is sleeved on the nut assembly, one end of the guide tube is inserted into the other end of the first outer sleeve, the second outer sleeve, the telescopic inner sleeve and the guide tube define an accommodating cavity, the coil spring is accommodated in the accommodating cavity, the coil spring is sleeved on the guide tube, and the coil spring is pre-pressed between the second outer sleeve and the telescopic inner sleeve.

[0011] In one embodiment, the motor assembly includes a motor and a reduction gearbox drivingly connected to the motor, the output end of the reduction gearbox is provided with an internal spline, the screw assembly includes a screw drivingly connected to the reduction gearbox and a bearing sleeved on the screw, the screw includes an external spline shaft section, a smooth shaft section and a threaded shaft section connected in sequence, at least part of the structure of the external spline shaft section is engaged with the internal spline, the bearing is sleeved on one end of the smooth shaft section close to the external spline shaft section, the electric strut also includes a seal, one end of the seal is sleeved on and abuts against one end of the smooth shaft section close to the threaded shaft section, and the other end of the seal is clamped between the outer ring of the bearing and the other end of the first outer sleeve.

[0012] In one embodiment, the electric support rod also includes a guide tube, which is sleeved on the nut assembly, and the seal is arranged in the guide tube. A mounting seat is provided at one end of the guide tube, and the mounting seat is arranged in the other end of the first outer sleeve. At least part of the structure of the bearing is accommodated in the mounting seat, and the other end of the seal is clamped between the outer ring of the bearing and the mounting seat.

[0013] In one embodiment, the electric support rod also includes an annular gasket and a damper, the annular gasket is clamped between the outer ring of the bearing and the mounting seat, the other end of the seal abuts against the annular gasket, the damper is accommodated in the first outer sleeve, is arranged between the reduction gear box and the bearing, and is transmission-connected to the external spline shaft segment.

[0014] Another technical solution adopted in the present application is: providing a vehicle, the vehicle comprising: a rear end; a tailgate hinged to the rear end; an electric strut, one of the electric struts being ball-hinged between the upper left side of the tailgate and the lower left side of the rear end, and the other of the electric struts being ball-hinged between the upper right side of the tailgate and the lower right side of the rear end; a controller electrically connected to the electric strut; wherein the electric strut is any one of the electric struts described above.

[0015] The beneficial effects of the present application are as follows: Different from the prior art, the electric support rod provided by the present application includes: a motor assembly; a screw assembly, which is connected to the motor assembly; a nut assembly, which is threaded with the screw assembly; a telescopic inner sleeve, which is connected to the nut assembly; a first connector, one end of which is fixed to the telescopic inner sleeve and the other end is connected to the vehicle tailgate ball hinge; a first outer sleeve, which is sleeved on the motor assembly; a second connector, one end of which is fixed to one end of the first outer sleeve and the other end is connected to the vehicle tailgate ball hinge; a second outer sleeve, which is sleeved on the telescopic inner sleeve and one end of the second outer sleeve is fixed to the other end of the first outer sleeve; wherein the telescopic inner sleeve can extend or retract relative to the second outer sleeve, thereby driving the vehicle tailgate to open or close relative to the vehicle tail. In this way, the electric support rod is easy to be injection molded, assembled and the quality of laser welding is controlled, thereby improving the waterproof and dustproof performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0018] Figure 2 is a schematic diagram of the structure of the electric support rod provided in an embodiment of the present application when it is in a retracted state;

[0019] Figure 3 yes Figure 2 A front view of an embodiment of an electric strut;

[0020] Figure 4 yes Figure 3 A cross-sectional view of the electric strut at AA;

[0021] Figure 5 is a schematic diagram of the structure of the electric support rod provided in an embodiment of the present application when it is in an extended state;

[0022] Figure 6 is an exploded schematic diagram of an electric support rod provided in an embodiment of the present application;

[0023] Figure 7 is a schematic structural diagram of a first outer sleeve provided in an embodiment of the present application;

[0024] Figure 8 is a schematic structural diagram of a second outer sleeve provided in an embodiment of the present application;

[0025] Fig. 9 is a schematic diagram of the structure of a motor assembly provided in an embodiment of the present application;

[0026] Fig.10 is a schematic diagram of the structure of the screw assembly provided in an embodiment of the present application;

[0027] Fig.11 is a schematic diagram of the structure of the screw provided in the embodiment of the present application;

[0028] Description of reference numerals:

[0029] 100-electric strut, 110-motor assembly, 111-motor, 112-reduction gearbox, 1121-internal spline, 113-socket, 120-screw assembly, 121-seal, 122-ring gasket, 123-guide tube, 1231-mounting seat, 124-screw, 1241-external spline shaft section, 1242-optical axis shaft section, 1243-threaded shaft section, 125-bearing, 130-nut assembly, 140-telescopic inner sleeve, 150-first connector, 160-first outer sleeve, 161-first connecting part, 170-second connector, 171-plug, 180-second outer sleeve, 181-second connecting part, 182-sealing part, 190-damper, 100a-accommodating chamber, 200-rear end of vehicle, 300-tailgate, 400-controller, 1000-vehicle. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0031] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0032] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The electric support rod provided by the present application includes: a motor assembly; a screw assembly, which is connected to the motor assembly; a nut assembly, which is screwed to the screw assembly; a telescopic inner sleeve, which is connected to the nut assembly; a first connector, one end of which is fixed to the telescopic inner sleeve, and the other end is connected to the rear of the vehicle and the tailgate of the vehicle by a ball joint; a first outer sleeve, which is sleeved on the motor assembly; a second connector, one end of which is fixed to one end of the first outer sleeve, and the other end is connected to the other of the rear of the vehicle and the tailgate of the vehicle by a ball joint; a second outer sleeve, which is sleeved on the telescopic inner sleeve and one end of the second outer sleeve is fixed to the other end of the first outer sleeve; wherein the telescopic inner sleeve can be extended or retracted relative to the second outer sleeve, thereby driving the tailgate of the vehicle to open or close relative to the rear of the vehicle. In this way, the electric support rod is easy to be injection molded, assembled and the quality of laser welding is controlled, thereby improving the waterproof and dustproof performance.

[0034] See also Figure 1 , Figure 11 is a schematic diagram of the structure of the vehicle provided in the embodiment of the present application. The vehicle 1000 may include but is not limited to a rear end 200, a tailgate 300, an electric strut 100 and a controller 400. The tailgate 300 is hinged to the rear end 200. An electric strut 100 is ball-jointed between the upper left side of the tailgate 300 and the lower left side of the rear end 200. Another electric strut 100 is ball-jointed between the upper right side of the tailgate 300 and the lower right side of the rear end 200. The controller 400 is electrically connected to the electric strut 100. The controller 400 can control the electric strut 100 to drive the tailgate 300 to open or close relative to the rear end 200.

[0035] Among them, "up" refers to the direction indicated by the positive direction of the Z axis. "Down" refers to the direction indicated by the negative direction of the Z axis. "Left" refers to the direction indicated by the negative direction of the Y axis. "Right" refers to the direction indicated by the positive direction of the Y axis.

[0036] Please refer to Figure 2-Figure 6 , Figure 2 is a schematic diagram of the structure of the electric support rod provided in the embodiment of the present application when it is in a retracted state, Figure 3 yes Figure 2 A front view of an embodiment of an electric strut, Figure 4 yes Figure 3 The cross-sectional view of the electric strut at AA, Figure 5 is a schematic diagram of the structure of the electric support rod provided in the embodiment of the present application when it is in an extended state, Figure 61 is a schematic diagram of an electric strut provided in an embodiment of the present application. The electric strut 100 may include but is not limited to a motor assembly 110, a screw assembly 120, a nut assembly 130, a telescopic inner sleeve 140, a first connector 150, a first outer sleeve 160, a second connector 170 and a second outer sleeve 180. The screw assembly 120 is connected to the motor assembly 110 by driving. The nut assembly 130 is screwed to the screw assembly 120 to convert the rotational motion of the screw assembly 120 into the linear motion of the nut assembly 130. The telescopic inner sleeve 140 is connected to the nut assembly 130 by driving to extend or retract relative to the second outer sleeve 180 under the linear push and pull of the nut assembly 130. One end of the first connector 150 is fixed to the telescopic inner sleeve 140. The other end of the first connector 150 is connected to a ball joint with one of the rear end 200 and the tailgate 300 of the vehicle. The first outer sleeve 160 is sleeved on the motor assembly 110. One end of the second connector 170 is fixed to one end of the first outer sleeve 160. The other end of the second connector 170 is connected to the other of the rear end 200 and the tailgate 300 of the vehicle by a ball joint. The second outer sleeve 180 is sleeved on the telescopic inner sleeve 140. One end of the second outer sleeve 180 is fixed to the other end of the first outer sleeve 160. The telescopic inner sleeve 140 can be extended or retracted relative to the second outer sleeve 180, thereby driving the tailgate 300 of the vehicle to open or close relative to the rear end 200. In this embodiment, the other end of the first connector 150 is connected to the rear end 200 by a ball joint, and the other end of the second connector 170 is connected to the tailgate 300 of the vehicle by a ball joint, so that it is difficult for external dust and water to enter the interior of the electric strut 100 and difficult to stay inside the electric strut 100.

[0037] It can be understood that the outer sleeve of the electric strut 100 is formed by an injection molding process. The longer the length of the outer sleeve, the greater the difficulty of injection molding, and the greater the difficulty of assembly. Therefore, the difficulty of injection molding and assembly can be reduced by dividing the outer sleeve into a first outer sleeve 160 and a second outer sleeve 180. Further, the electric strut 100 is equipped with a motor assembly 110, and the requirements for waterproof and dustproof are very high. Welding the outer sleeve with the motor assembly 110 by the laser welding process can achieve good waterproof and dustproof performance. Therefore, the quality of laser welding directly affects the waterproof and dustproof performance of the electric strut 100. By dividing the outer sleeve into a first outer sleeve 160 and a second outer sleeve 180 and sleeved the first outer sleeve 160 on the motor assembly 110, the waterproof and dustproof performance of the electric strut 100 can be guaranteed by controlling the laser welding quality of the first outer sleeve 160. Further, the material of the first outer sleeve 160 can be selected from materials with excellent welding performance, and the material of the second outer sleeve 180 can be selected from ordinary materials to reduce the cost of the electric strut 100.

[0038] Further, one end of the second connector 170 is inserted into one end of the first outer sleeve 160. One end of the second connector 170 is connected to the first outer sleeve 160 by laser welding to achieve good waterproof and dustproof performance.

[0039] Please refer to Figure 2-Figure 8 , Figure 7 is a schematic structural diagram of a first outer sleeve provided in an embodiment of the present application, Figure 8 1 is a schematic diagram of the structure of the second outer sleeve provided in an embodiment of the present application. The other end of the first outer sleeve 160 extends radially inward to form a first connecting portion 161. One end of the second outer sleeve 180 extends radially inward to form a second connecting portion 181. The second connecting portion 181 is fixed to the first connecting portion 161 to connect the second outer sleeve 180 to the first outer sleeve 160.

[0040] Furthermore, the electric support rod 100 further includes a guide tube 123. The guide tube 123 is sleeved on the nut assembly 130. One end of the guide tube 123 passes through the second connecting portion 181 and the first connecting portion 161. The second outer sleeve 180 is further provided with a sealing portion 182. The sealing portion 182 is provided between the second connecting portion 181 and the guide tube 123 to prevent dust and water from entering the first outer sleeve 160 from the second outer sleeve 180.

[0041] Further, one end of the guide tube 123 is inserted into the other end of the first outer sleeve 160. One end of the guide tube 123 is connected to the first outer sleeve 160 by laser welding to achieve good waterproof and dustproof performance.

[0042] Furthermore, the electric support rod 100 further includes a coil spring (not shown). The second outer sleeve 180, the telescopic inner sleeve 140 and the guide tube 123 define a receiving chamber 100a. The coil spring (not shown) is received in the receiving chamber 100a. The coil spring (not shown) is sleeved on the guide tube 123. The coil spring (not shown) is pre-stressed between the second outer sleeve 180 and the telescopic inner sleeve 140 to assist the telescopic inner sleeve 140 to extend, counterbalance the telescopic inner sleeve 140 to retract and provide a balancing force when the tailgate 300 is in a hovering state.

[0043] It is understandable that different vehicle models have different requirements for the parameters of the coil spring. Coil springs with different parameters have different requirements for the space size of the accommodating chamber 100a. The electric strut 100 can change the space size of the accommodating chamber 100a by replacing different second outer sleeves 180 and telescopic inner sleeves 140, so as to adapt to different vehicle models, greatly improving the adaptability of the electric strut 100 and reducing inventory.

[0044] Please refer to Figure 2-Figure 11 , Fig. 9 is a schematic diagram of the structure of the motor assembly provided in an embodiment of the present application, Fig.10is a schematic diagram of the structure of the screw assembly provided in the embodiment of the present application, Fig.11 1 is a schematic diagram of the structure of the screw provided in an embodiment of the present application. A socket 113 is provided at one end of the motor assembly 110 facing the second connector 170. A plug 171 is provided at one end of the second connector 170. The plug 171 is plugged into the socket 113 to fix the motor assembly 110. The motor assembly 110 may include but is not limited to a motor 111 and a reduction box 112 driven and connected to the motor 111. An internal spline 1121 is provided at the output end of the reduction box 112. The screw assembly 120 may include but is not limited to a screw 124 driven and connected to the reduction box 112 and a bearing 125 sleeved on the screw 124. The screw 124 may include but is not limited to an external spline shaft section 1241, an optical shaft section 1242 and a threaded shaft section 1243 connected in sequence. At least part of the structure of the external spline shaft section 1241 is meshed with the internal spline 1121. The bearing 125 is sleeved on one end of the optical shaft section 1242 close to the external spline shaft section 1241. The electric support rod 100 further includes a seal 121. One end of the seal 121 is sleeved and abutted against one end of the optical axis section 1242 near the threaded section 1243 to prevent dust and water from entering the first outer sleeve 160 from the second outer sleeve 180. The other end of the seal 121 is clamped between the outer ring of the bearing 125 and the other end of the first outer sleeve 160 to prevent dust and water from entering the first outer sleeve 160 from the second outer sleeve 180.

[0045] Further, the seal 121 is disposed in the guide tube 123. A mounting seat 1231 is disposed at one end of the guide tube 123. The mounting seat 1231 is disposed in the other end of the first outer sleeve 160. At least part of the structure of the bearing 125 is accommodated in the mounting seat 1231. The other end of the seal 121 is clamped between the outer ring of the bearing 125 and the mounting seat 1231 to prevent dust and water from entering the first outer sleeve 160 from the guide tube 123.

[0046] Furthermore, the electric strut 100 further includes an annular gasket 122 and a damper 190. The annular gasket 122 is clamped between the outer ring of the bearing 125 and the mounting seat 1231. The other end of the seal 121 abuts against the annular gasket 122. The damper 190 is accommodated in the first outer sleeve 160, disposed between the reduction box 112 and the bearing 125, and is in transmission connection with the outer spline shaft section 1241.

[0047] The electric strut 100 provided in the present application includes: a motor assembly 110; a screw assembly 120, which is driven and connected to the motor assembly 110; a nut assembly 130, which is threadedly connected to the screw assembly 120; a telescopic inner sleeve 140, which is driven and connected to the nut assembly 130; a first connector 150, one end of which is fixed to the telescopic inner sleeve 140, and the other end of which is ball-jointed to one of the rear end 200 and the tailgate 300 of the vehicle; a first outer sleeve 160, which is sleeved on the motor assembly 110; a second connector 170, one end of which is fixed to one end of the first outer sleeve 160, and the other end of which is ball-jointed to the other of the rear end 200 and the tailgate 300 of the vehicle; a second outer sleeve 180, which is sleeved on the telescopic inner sleeve 140 and one end of the second outer sleeve 180 is fixed to the other end of the first outer sleeve 160; wherein the telescopic inner sleeve 140 can be extended or retracted relative to the second outer sleeve 180, thereby driving the tailgate 300 of the vehicle to open or close relative to the rear end 200. In this way, the electric support rod 100 is easy to be injection molded, assembled and the quality of laser welding is controlled, thereby improving the waterproof and dustproof performance.

[0048] The above descriptions are only some embodiments of the present application, and do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electric support rod, characterized in that: include: Motor components; A screw assembly is drivingly connected to the motor assembly; A nut assembly, threadedly connected to the screw assembly; A telescopic inner sleeve drivingly connected to the nut assembly; A first connector, one end of which is fixed to the telescopic inner sleeve and the other end of which is connected to the rear of the vehicle and one of the tailgate of the vehicle by a ball joint; A first outer sleeve, sleeved on the motor assembly; A second connector, one end of which is fixed to one end of the first outer sleeve, and the other end of which is connected to the other of the rear of the vehicle and the tailgate of the vehicle by a ball joint; A second outer sleeve, which is sleeved on the telescopic inner sleeve and one end of the second outer sleeve is fixed to the other end of the first outer sleeve; The telescopic inner sleeve can be extended or retracted relative to the second outer sleeve, thereby driving the vehicle tailgate to open or close relative to the vehicle rear.

2. The electric strut according to claim 1, characterized in that: One end of the second connector is inserted into one end of the first outer sleeve, and one end of the second connector is connected to the first outer sleeve by laser welding.

3. The electric strut according to claim 2, characterized in that: A plug is provided at one end of the second connector, and a socket is provided at one end of the motor assembly facing the second connector, and the plug is plugged into the socket.

4. The electric strut according to claim 1, characterized in that: The other end of the first outer sleeve extends radially inward to form a first connection portion, and one end of the second outer sleeve extends radially inward to form a second connection portion, and the second connection portion is fixed to the first connection portion.

5. The electric strut according to claim 4, characterized in that: The electric support rod also includes a guide tube, which is sleeved on the nut assembly. One end of the guide tube passes through the second connecting part and the first connecting part. The second outer sleeve is also provided with a sealing part, which is arranged between the second connecting part and the guide tube.

6. The electric strut according to claim 1, characterized in that: The electric strut also includes a guide tube, which is sleeved on the nut assembly, one end of the guide tube is inserted into the other end of the first outer sleeve, and one end of the guide tube is connected to the first outer sleeve by laser welding.

7. The electric strut according to claim 1, characterized in that: The electric support rod also includes a guide tube and a coil spring. The guide tube is sleeved on the nut assembly. One end of the guide tube is inserted into the other end of the first outer sleeve. The second outer sleeve, the telescopic inner sleeve and the guide tube define an accommodating cavity. The coil spring is accommodated in the accommodating cavity. The coil spring is sleeved on the guide tube. The coil spring is pre-stressed between the second outer sleeve and the telescopic inner sleeve.

8. The electric strut according to claim 1, characterized in that: The motor assembly includes a motor and a reduction gearbox drivingly connected to the motor, an internal spline is provided at the output end of the reduction gearbox, the screw assembly includes a screw drivingly connected to the reduction gearbox and a bearing sleeved on the screw, the screw includes an external spline shaft section, a smooth shaft section and a threaded shaft section connected in sequence, at least a part of the structure of the external spline shaft section is engaged with the internal spline, the bearing is sleeved on one end of the smooth shaft section close to the external spline shaft section, the electric strut also includes a seal, one end of the seal is sleeved on and abuts against one end of the smooth shaft section close to the threaded shaft section, and the other end of the seal is clamped between the outer ring of the bearing and the other end of the first outer sleeve.

9. The electric strut according to claim 8, characterized in that: The electric support rod also includes a guide tube, which is sleeved on the nut assembly, and the seal is arranged in the guide tube. One end of the guide tube is provided with a mounting seat, and the mounting seat is arranged in the other end of the first outer sleeve. At least part of the structure of the bearing is accommodated in the mounting seat, and the other end of the seal is clamped between the outer ring of the bearing and the mounting seat.

10. The electric strut according to claim 9, characterized in that: The electric strut also includes an annular gasket and a damper. The annular gasket is clamped between the outer ring of the bearing and the mounting seat. The other end of the seal abuts against the annular gasket. The damper is accommodated in the first outer sleeve, disposed between the reduction gearbox and the bearing, and is transmission-connected to the external spline shaft segment.

11. A vehicle, characterized in that: include: rear of the vehicle; a tailgate, hinged to the rear of the vehicle; An electric strut, one of the electric struts being connected by a ball hinge between the upper left side of the tailgate and the lower left side of the rear of the vehicle, and the other of the electric struts being connected by a ball hinge between the upper right side of the tailgate and the lower right side of the rear of the vehicle; A controller, electrically connected to the electric support rod; Wherein, the electric support rod is the electric support rod as described in any one of claims 1-10.

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