Electric tail door supporting rod

Abstract

The invention relates to an electric tail door supporting rod, and relates to the technical field of automobile parts. The electric tail door supporting rod comprises an outer sleeve and an inner sleeve, a motor assembly is fixedly arranged in one end of the outer sleeve, and the inner sleeve is inserted into the outer sleeve in a sliding mode; an annular blocking edge is arranged on the inner wall of the outer sleeve, and the motor assembly is located between the motor end connector assembly and the annular blocking edge. The output end of the motor assembly is connected with a lead screw assembly used for driving the axis of the inner sleeve to move. A lead screw supporting ring is arranged in the annular blocking edge, and a lead screw sealing ring is arranged between the lead screw supporting ring and the lead screw assembly. A spring bushing arranged outside the lead screw assembly in a sleeving manner is inserted into the outer sleeve, and a flanging flange is arranged at the end, facing the motor assembly, of the spring bushing; the flanging flange abuts against the annular blocking edge, and a sealing gasket is arranged between the flanging flange and the annular blocking edge. An inclined annular lip edge is arranged on one side of the sealing gasket and abuts against the side face of the lead screw supporting ring. The electric tail door supporting rod is good in sealing performance and small in friction resistance.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to an electric tailgate support rod. Background Art

[0002] The electric tailgate support rod is a device installed on the tailgate of a car, mainly used to support and control the opening and closing of the tailgate. As an important part of modern cars, the electric tailgate support rod plays an indispensable role in improving user experience.

[0003] Since the electric tailgate support rod is equipped with electrical components, if water enters the electrode area of ​​the electric tailgate support rod, it will cause the motor and other electrical components to short-circuit, thereby causing circuit failure and damage to the electrical components, which will cause the electric tailgate support rod to lose its main electric drive function and even endanger the safety of the entire vehicle. In order to ensure that the electric tailgate support rod can work normally in various environments such as rainy days or humid environments, the electric tailgate support rod has a high waterproof function requirement. The key to a good waterproof design is to ensure the sealing between the assembly parts, and the difficulty lies in the dynamic and static sealing between the rotating parts such as the lead screw and the outer sleeve.

[0004] Existing technical solutions usually adopt a variety of sealing measures in the design of the electric tailgate support rod. For example, common methods include but are not limited to using traditional O-rings or other types of seals to achieve sealing between the moving and static parts. In addition, some designs will consider using more complex multi-layer sealing systems or special material processing technologies to enhance sealing performance.

[0005] However, these commonly used sealing methods often have some shortcomings. Sealing methods such as O-rings that rely on radial interference can achieve better sealing effects, but they will produce greater frictional resistance. For the electric tailgate support rod, since it involves the interaction between dynamic components such as the screw and the fixed structure around it, the traditional O-ring sealing structure will cause greater frictional resistance, which is not conducive to the normal and efficient operation of the electric tailgate support rod, and is also prone to wear and tear, resulting in sealing failure. Summary of the invention

[0006] In order to improve the sealing performance of an electric tailgate support rod and reduce the friction resistance during its movement, the present application provides an electric tailgate support rod.

[0007] The electric tailgate support provided in this application adopts the following technical solution: An electric tailgate support rod comprises an outer sleeve and an inner sleeve, wherein a motor assembly is fixedly arranged in one end of the outer sleeve, and the inner sleeve is slidably inserted into the outer sleeve from the other end of the outer sleeve; The outer sleeve is provided with an end port of the motor assembly which is sealed and fixedly connected to the motor end connector assembly; The inner wall of the outer sleeve is provided with an annular retaining edge, and the motor assembly is located between the motor end joint assembly and the annular retaining edge; the output end of the motor assembly is connected to a screw assembly for driving the inner sleeve axis to move; A screw support ring is arranged inside the annular baffle, the screw assembly passes through the screw support ring, and a screw sealing ring is arranged between the inner wall of the screw support ring and the outer peripheral surface of the screw; A spring bushing sleeved outside the screw assembly is inserted into the outer sleeve, and the end of the spring bushing facing the motor assembly has a flanged flange; a strut spring for pushing the inner sleeve to move in the opposite direction of the axis is also provided in the outer sleeve; the strut spring is sleeved outside the spring bushing, and the two ends of the strut spring act on the flanged flange and the inner sleeve respectively; The flanged flange abuts against the annular retaining edge and a sealing gasket is arranged between the two; one side of the sealing gasket has an inclined annular lip and the annular lip abuts against the side surface of the screw support ring.

[0008] By adopting the above technical solution, the motor assembly is connected to the screw assembly and can drive the screw assembly to rotate; the rotation of the screw assembly drives the inner sleeve to move linearly. The sealing gasket in the present application is formed of soft material, and the sealing gasket is clamped before the flanged flange and the annular retaining edge. The sealing gasket is pressed by the support rod spring and the flanged flange to form an outer ring seal, which can prevent water from entering the motor assembly area from the mounting surfaces of the spring bushing and the outer sleeve; the inner side of the sealing gasket has an inclined annular lip, which is pressed on the side of the screw support ring, and relies on the elastic force of the material itself to play a sealing role, thereby forming an inner ring seal to prevent water from entering the motor assembly area from the gap between the screw assembly and the spring bushing; wherein, by adjusting the size and interference of the sealing gasket lip material, different sealing effects can be produced, and the rotational friction resistance is small.

[0009] The annular lip of the sealing gasket in the present application relies on the elastic force of the material itself to press against the side of the screw support ring to seal between the rotating part and the stationary part. While ensuring the sealing effect, it has a smaller friction resistance, has a lower dimensional tolerance requirement for the sealing gasket, and reduces the production cost.

[0010] Optionally, the annular retainer has a first step groove on a side facing the spring bushing, the screw support ring has a second step groove on a side facing the spring bushing, the first step groove and the second step groove are arranged opposite to each other; the sealing gasket is located in the first step groove and the second step groove; The sealing gasket is in a circular ring shape, the annular lip extends obliquely from the middle of the inner wall of the sealing gasket toward the central axis of the sealing gasket, and the thickness of the annular lip gradually becomes thinner from one side close to the inner wall of the sealing gasket to the other side; The body side surface of the sealing gasket abuts against the bottom surface of the first step groove; the annular lip abuts against the bottom surface of the second step groove.

[0011] By adopting the above technical solution, the stability and reliability of the installation of the sealing gasket is improved, thereby ensuring its sealing effect; at the same time, the above structure enables the annular lip of the sealing gasket to have better deformation ability, which can better achieve dynamic and static sealing, effectively prevent water from entering the motor assembly area from the gap between the screw support ring and the screw assembly, and reduce friction resistance.

[0012] Optionally, the sealing gasket has an annular clearance groove on the side facing the flanging flange, and the annular clearance groove forms two spaced-apart annular abutment rings on the side facing the flanging flange of the sealing gasket.

[0013] By adopting the above technical solution, the sealing gasket also forms two seals on the flanged flange, which is conducive to the sealing gasket to produce greater deformation on the contact surface of the flanged flange, thereby improving the sealing effect.

[0014] Optionally, the motor end connector assembly is fixedly connected to the end of the outer sleeve by laser welding, and a wiring harness port is opened on the motor end connector assembly. The wiring harness port of the motor end connector assembly is connected to a bellows by interference fit, and the motor wiring harness of the motor assembly passes through the wiring harness port and the bellows.

[0015] By adopting the above technical solution, the outer sleeve and the motor end connector assembly are laser welded, and the high temperature generated by the laser fuses the materials of the mating surfaces to form a whole, which not only ensures the connection strength, but also plays a good sealing role, preventing water from entering the inner part of the outer sleeve from the connection between the outer sleeve and the motor end connector assembly and damaging the electrical components. The corrugated tube is a soft material part, and has an interference fit with the wiring harness port of the motor end connector assembly, which plays a sealing role and prevents water from entering the motor assembly area from the inlet and outlet of the motor wiring harness.

[0016] Optionally, the output end of the motor assembly is connected to a coupling, a bearing seat is fixedly provided in the outer sleeve, a bearing is arranged in the bearing seat, the outer ring of the bearing is tightly fitted with the bearing seat, and the screw assembly is connected to the coupling through the bearing; the screw support ring on the screw assembly is in abutment with the inner ring of the bearing.

[0017] By adopting the above technical solution, the friction resistance of the screw rod assembly during rotation is reduced, the wear is reduced, and the service life of the entire electric tailgate support rod is guaranteed.

[0018] Optionally, the annular retaining edge is integrally formed with the outer sleeve, and the bearing seat and the outer ring of the bearing both abut against the side of the annular retaining edge facing the motor assembly.

[0019] By adopting the above technical solution, the stability and reliability of the structure are enhanced, the gap and looseness problems that may be caused by the split structure are avoided, and the supporting strength and sealing performance of the annular retaining edge are guaranteed.

[0020] Optionally, a motor buffer sleeve and a damping assembly are provided at the output end of the motor assembly; the bearing is arranged on the side of the bearing seat away from the motor assembly, and a coupling seat is provided on the side of the bearing seat close to the motor assembly, the coupling is installed in the coupling seat and a coupling buffer sleeve is also provided on the coupling.

[0021] By adopting the above technical solution, a motor buffer sleeve and a damping assembly are provided at the output end of the motor assembly, which can effectively absorb the vibration and impact generated by the motor assembly during operation and extend the service life of the motor assembly; similarly, the setting of the coupling buffer sleeve also further reduces the vibration and noise during the transmission process, and improves the stability and service life of the electric tailgate support rod.

[0022] Optionally, an inner support tube is further provided in the inner sleeve, and one end of the screw rod assembly away from the motor assembly extends into the inner support tube. A nut assembly is provided in the inner support tube for circumferential limiting, and the nut assembly is threadedly connected to the screw rod assembly. A limiting protrusion is also provided on the inner wall of the inner support tube for limiting the axial movement of the nut assembly and disengaging from the inner support tube.

[0023] By adopting the above technical solution, the circumferential limit of the nut assembly is arranged in the inner support tube and is threadedly connected with the screw assembly, which can effectively transmit the power of the motor assembly and enable the inner support tube and the inner sleeve to achieve axial movement; the limiting protrusion on the inner wall of the inner support tube limits the axial movement of the nut assembly, and the axial limit cooperation of the two is utilized to drive the movement of the inner support tube, while preventing the nut assembly from detaching from the inner support tube, thereby improving the reliability and stability of the overall structure.

[0024] Optionally, one end of the spring bushing away from the motor assembly is sleeved on the inner support tube, the inner sleeve and the end of the inner support tube away from the motor assembly are fixedly connected with a ball and socket assembly, and the strut spring extends between the inner sleeve and the inner support tube.

[0025] By adopting the above technical solution, the stability and reliability of the overall structure are guaranteed.

[0026] Optionally, an annular groove is formed on the outer circumferential surface of the screw assembly, and the screw sealing ring is embedded in the annular groove.

[0027] By adopting the above technical solution, the stability and reliability of the screw seal ring installation is guaranteed, and at the same time, it can be accurately positioned and easily assembled.

[0028] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application includes a sealing gasket formed of soft materials to seal moving parts and stationary parts, a screw seal formed of soft materials that seals by interference fit, a laser welding process that fuses mating surface materials at high temperature, and a bellows formed of soft materials that seals by interference fit. The design of multiple sealing structures ensures that all parts that can enter the motor assembly area inside the electric tailgate support rod are sealed, effectively preventing water from entering the electrical component area and damaging it.

[0029] 2. The structure and installation structure of the sealing gasket are optimized in this application. The outer ring body of the sealing gasket is pressed and sealed, and the inclined lip on the sealing gasket is pressed against the side of the screw support ring by the elastic force of the material itself, thereby sealing between the rotating part and the stationary part. This structure not only ensures the sealing effect, but also avoids the generation of excessive friction resistance that affects the normal operation of components.

[0030] 3. The present application has a lower requirement for the size tolerance of the sealing gasket, thus reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view structural schematic diagram of the electric tailgate support rod of the present application.

[0032] Figure 2 It is a schematic diagram of the exploded structure of the electric tailgate support rod of the present application.

[0033] Figure 3 It is a schematic cross-sectional view of the electric tailgate support rod of the present application.

[0034] Figure 4 yes Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0035] Figure 5 It is a schematic diagram of the three-dimensional structure of the sealing gasket in this application.

[0036] Figure 6 It is a schematic diagram of the cross-sectional structure of the sealing gasket in this application.

[0037] In the figure: 10. Outer sleeve; 11. Annular retaining edge; 12. First step groove; 20. Inner sleeve; 30. Ball and socket assembly; 40. Motor end connector assembly; 41. Wire harness port; 50. Motor assembly; 51. Motor wiring harness; 60. Motor buffer sleeve; 70. Damping assembly; 80. Coupling; 90. Bearing seat; 100. Bearing; 110. Coupling seat; 120. Coupling buffer sleeve; 130. Screw assembly; 131. Annular groove; 140. Screw support ring; 141. Second step groove; 150. Screw sealing ring; 160. Spring bushing; 161. Flanged flange; 170. Strut spring; 180. Sealing gasket; 181. Annular lip; 182. Annular clearance groove; 183. Abutment ring; 190. Inner support tube; 191. Limiting protrusion; 200. Nut assembly; 210. Bellows. DETAILED DESCRIPTION

[0038] The following will be combined with the attached Figure 1 -Attached Figure 6 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0039] Reference Figure 1 and Figure 2 As shown, the electric tailgate support rod provided in the embodiment of the present application includes an outer sleeve 10 and an inner sleeve 20, one end of the inner sleeve 20 is slidably inserted into the outer sleeve 10 from one end of the outer sleeve 10; the other end of the inner sleeve 20 is fixedly connected to a ball socket assembly 30; the other end of the outer sleeve 10 is fixedly connected to a motor end joint assembly 40. In this embodiment, the inner sleeve 20 and the ball socket assembly 30 are fixedly connected by laser welding, and the motor end joint assembly 40 is also fixedly connected to the end of the outer sleeve 10 by laser welding. The high temperature generated by the laser fuses the materials of the mating surfaces to form a whole, which not only ensures the connection strength, but also plays a good sealing role, preventing water from entering the inner part of the outer sleeve 10 from the connection between the outer sleeve 10 and the motor end joint assembly 40 and from the connection between the inner sleeve 20 and the ball socket assembly 30 to damage the electrical components.

[0040] Reference Figure 2 and Figure 3As shown, the outer sleeve 10 is fixed with a motor assembly 50, and the circuit part of the motor assembly 50 is close to the motor end connector assembly 40; the motor end connector assembly 40 is provided with a harness port 41, and the harness port 41 of the motor end connector assembly 40 is connected with a bellows 210 through interference fit, and the motor harness 51 of the motor assembly 50 passes through the harness port 41 and the bellows 210. The bellows 210 is a soft material part, and is interference fit with the harness port 41 of the motor end connector assembly 40, playing a sealing role, preventing water from entering the motor assembly 50 area from the inlet and outlet of the motor harness 51.

[0041] Reference Figure 2 and Figure 3 As shown, the output end of the motor assembly 50 is provided with a motor buffer sleeve 60 and a damping assembly 70, which can effectively absorb the vibration and impact generated by the motor assembly 50 during operation and extend the service life of the motor assembly 50; the output end of the motor assembly 50 is connected to a coupling 80; combined Figure 4 As shown, a bearing seat 90 is fixedly provided in the outer sleeve 10, and a bearing 100 is arranged in the bearing seat 90. The outer ring of the bearing 100 is tightly fitted with the bearing seat 90, and the bearing 100 is arranged on the side of the bearing seat 90 away from the motor assembly 50. A coupling seat 110 is arranged on the side of the bearing seat 90 close to the motor assembly 50. The coupling 80 is installed in the coupling seat 110 and a coupling buffer sleeve 120 is also arranged on the coupling 80. The setting of the coupling buffer sleeve 120 also further reduces the vibration and noise during the transmission process, and improves the stability and service life of the electric tailgate support rod; the output end of the motor assembly 50 is connected to the screw assembly 130 through the coupling 80, and the screw assembly 130 passes through the bearing 100 and is connected to the inner sleeve 20. The rotation of the screw assembly 130 can drive the axis of the inner sleeve 20 to move.

[0042] Reference Figure 2 and Figure 3As shown, the inner wall of the outer sleeve 10 is provided with an annular retaining edge 11, and the motor assembly 50 is located between the motor end joint assembly 40 and the annular retaining edge 11; the annular retaining edge 11 is integrally formed with the outer sleeve 10, and the outer rings of the bearing seat 90 and the bearing 100 are both against the side of the annular retaining edge 11 facing the motor assembly 50. A screw support ring 140 is arranged inside the annular retaining edge 11, the screw assembly 130 passes through the screw support ring 140, and a screw seal ring 150 is arranged between the inner wall of the screw support ring 140 and the outer peripheral surface of the screw, and an annular groove 131 is opened on the outer peripheral surface of the screw assembly 130, and the screw seal ring 150 is embedded in the annular groove 131; the screw support ring 140 on the screw assembly 130 is against the inner ring of the bearing 100. A spring bushing 160 sleeved on the outside of the screw assembly 130 is inserted into the outer sleeve 10, and the end of the spring bushing 160 facing the motor assembly 50 has a flanged flange 161; a support rod spring 170 is also provided in the outer sleeve 10 to push the inner sleeve 20 to move in the opposite axis; the support rod spring 170 is sleeved on the outside of the spring bushing 160 and the two ends of the support rod spring 170 act on the flanged flange 161 and the inner sleeve 20 respectively; the flanged flange 161 abuts against the annular retaining edge 11 and a sealing gasket 180 is provided therebetween; one side of the sealing gasket 180 has an inclined annular lip 181 and the annular lip 181 abuts against the side of the screw support ring 140.

[0043] Further, see Figure 4 and Figure 5 As shown, the annular retaining edge 11 has a first step groove 12 on the side facing the spring bushing 160, and the screw support ring 140 has a second step groove 141 on the side facing the spring bushing 160. The first step groove 12 and the second step groove 141 are arranged opposite to each other; the sealing gasket 180 is located in the first step groove 12 and the second step groove 141. Figure 5 and Figure 6 As shown, the sealing gasket 180 is in a circular shape, and the annular lip 181 extends obliquely from the middle of the inner wall of the sealing gasket 180 to the central axis direction of the sealing gasket 180, and the thickness of the annular lip 181 gradually becomes thinner from one side close to the inner wall of the sealing gasket 180 to the other side; the body side of the sealing gasket 180 abuts against the bottom surface of the first step groove 12; the annular lip 181 abuts against the bottom surface of the second step groove 141. The sealing gasket 180 has an annular clearance groove 182 on the side facing the flanged flange 161, and the annular clearance groove 182 forms two spaced and annular abutment rings 183 on the side facing the flanged flange 161 of the sealing gasket 180, so that the sealing gasket 180 forms two seals on the flanged flange 161, and at the same time, it is conducive to the sealing gasket 180 to produce a greater deformation on the contact surface of the flanged flange 161, thereby improving the sealing effect.

[0044] Reference Figure 2 and Figure 3As shown, an inner support tube 190 is also provided in the inner sleeve 20, and one end of the screw rod assembly 130 away from the motor assembly 50 extends into the inner support tube 190, and a nut assembly 200 is provided in the inner support tube 190 for circumferential limiting, and the nut assembly 200 is screwed on the screw rod assembly 130; a limiting protrusion 191 is also provided on the inner wall of the inner support tube 190 for limiting the axial movement of the nut assembly 200 and separating from the inner support tube 190; the nut assembly 200 is circumferentially limited in the inner support tube 190 and is screwed with the screw rod assembly 130, which can effectively transmit the power of the motor assembly 50 and enable the inner support tube 190 and the inner sleeve 20 to achieve axial movement; the limiting protrusion 191 on the inner wall of the inner support tube 190 limits the axial movement of the nut assembly 200, and the axial limiting cooperation of the two drives the inner support tube 190 to move, while preventing the nut assembly 200 from separating from the inner support tube 190, thereby improving the reliability and stability of the overall structure. One end of the spring bushing 160 away from the motor assembly 50 is sleeved on the inner support tube 190, the ball and socket assembly 30 is fixedly connected to the inner sleeve 20 and the end of the inner support tube 190 away from the motor assembly 50, and the strut spring 170 extends between the inner sleeve 20 and the inner support tube 190.

[0045] The implementation principle of this embodiment is as follows: when the electric tailgate support rod is in use, one end of the electric tailgate support rod is connected to the car tailgate through the ball and socket assembly 30, and the other end of the electric tailgate support rod is connected to the car body through the motor end joint assembly 40. The motor assembly 50 is connected to the screw assembly 130 and can drive the screw assembly 130 to rotate; the rotation of the screw assembly 130 drives the inner sleeve 20 to move linearly, and the support rod spring 170 can drive the inner sleeve 20 to move linearly in the opposite direction. The sealing gasket 180 in the present application is formed of a soft material. The sealing gasket 180 is clamped between the flanging flange 161 and the annular retaining edge 11. The sealing gasket 180 is pressed by the support rod spring 170 and the flanging flange 161 to form an outer ring seal, which can prevent water from entering the motor assembly 50 area from the mounting surfaces of the spring bushing 160 and the outer sleeve 10; the inner side of the sealing gasket 180 has an inclined annular lip 181, which presses on the side of the screw support ring 140 and relies on the elastic force of the material itself to play a sealing role, thereby forming an inner ring seal to prevent water from entering the motor assembly 50 area from the gap between the screw assembly 130 and the spring bushing 160; wherein, by adjusting the size and interference of the lip material of the sealing gasket 180, different sealing effects can be produced, and the rotational friction resistance is small.

[0046] In the present application, the annular lip 181 of the sealing gasket 180 relies on the elastic force of the material itself to press against the side of the screw support ring 140 to seal between the rotating part and the stationary part. While ensuring the sealing effect, it has a small friction resistance, and the dimensional tolerance requirement of the sealing gasket 180 is low, which reduces the production cost.

[0047] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric tailgate support rod, comprising an outer sleeve (10) and an inner sleeve (20), wherein a motor assembly (50) is fixedly arranged in one end of the outer sleeve (10), and the inner sleeve (20) is slidably inserted into the outer sleeve (10) from the other end of the outer sleeve (10); It is characterized in that The outer sleeve (10) is provided with a motor assembly (50) and one end port is sealed and fixedly connected to a motor end connector assembly (40); The inner wall of the outer sleeve (10) is provided with an annular retaining edge (11), and the motor assembly (50) is located between the motor end joint assembly (40) and the annular retaining edge (11); the output end of the motor assembly (50) is connected to a screw assembly (130) for driving the axis of the inner sleeve (20) to move; A screw support ring (140) is arranged inside the annular baffle (11), the screw assembly (130) passes through the screw support ring (140), and a screw seal ring (150) is arranged between the inner wall of the screw support ring (140) and the outer peripheral surface of the screw; A spring bushing (160) sleeved on the outside of the screw assembly (130) is inserted into the outer sleeve (10), and the end of the spring bushing (160) facing the motor assembly (50) has a flanged flange (161); a support rod spring (170) for pushing the inner sleeve (20) to move in the opposite direction of the axis is also provided in the outer sleeve (10); the support rod spring (170) is sleeved on the outside of the spring bushing (160), and the two ends of the support rod spring (170) act on the flanged flange (161) and the inner sleeve (20) respectively; The flanged flange (161) abuts against the annular retaining edge (11) and a sealing gasket (180) is arranged between the two; one side of the sealing gasket (180) has an inclined annular lip (181) and the annular lip (181) abuts against the side surface of the screw support ring (140).

2. The electric tailgate support rod according to claim 1, characterized in that: The annular retaining edge (11) has a first step groove (12) on the side facing the spring bushing (160), and the screw rod support ring (140) has a second step groove (141) on the side facing the spring bushing (160), and the first step groove (12) and the second step groove (141) are arranged opposite to each other; the sealing gasket (180) is located in the first step groove (12) and the second step groove (141); The sealing gasket (180) is in the shape of a ring, the annular lip (181) extends obliquely from the middle of the inner wall of the sealing gasket (180) toward the central axis of the sealing gasket (180), and the thickness of the annular lip (181) gradually becomes thinner from one side close to the inner wall of the sealing gasket (180) to the other side; The body side surface of the sealing gasket (180) abuts against the bottom surface of the first step groove (12); and the annular lip edge (181) abuts against the bottom surface of the second step groove (141).

3. The electric tailgate support rod according to claim 2, characterized in that: The sealing gasket (180) has an annular clearance groove (182) on the side facing the flange (161), and the annular clearance groove (182) forms two spaced-apart annular abutment rings (183) on the side facing the flange (161) of the sealing gasket (180).

4. The electric tailgate support rod according to claim 1, 2 or 3, characterized in that: The motor end connector assembly (40) is fixedly connected to the end of the outer sleeve (10) by laser welding, and a wiring harness opening (41) is provided on the motor end connector assembly (40). The wiring harness opening (41) of the motor end connector assembly (40) is connected to a bellows (210) by interference fit, and the motor wiring harness (51) of the motor assembly (50) passes through the wiring harness opening (41) and the bellows (210).

5. The electric tailgate support rod according to claim 1, 2 or 3, characterized in that: The output end of the motor assembly (50) is connected to a coupling (80); a bearing seat (90) is fixedly provided in the outer sleeve (10); a bearing (100) is provided in the bearing seat (90); the outer ring of the bearing (100) is tightly matched with the bearing seat (90); the screw assembly (130) passes through the bearing (100) and is connected to the coupling (80); the screw support ring (140) on the screw assembly (130) is in contact with the inner ring of the bearing (100).

6. The electric tailgate support rod according to claim 5, characterized in that: The annular retaining edge (11) is integrally formed with the outer sleeve (10), and the outer rings of the bearing seat (90) and the bearing (100) are both pressed against the side of the annular retaining edge (11) facing the motor assembly (50).

7. The electric tailgate support rod according to claim 5, characterized in that: The output end of the motor assembly (50) is provided with a motor buffer sleeve (60) and a damping assembly (70); the bearing (100) is arranged on a side of the bearing seat (90) away from the motor assembly (50); a coupling seat (110) is arranged on a side of the bearing seat (90) close to the motor assembly (50); the coupling (80) is installed in the coupling seat (110) and a coupling buffer sleeve (120) is also arranged on the coupling (80).

8. The electric tailgate support rod according to claim 1, 2 or 3, characterized in that: An inner support tube (190) is also provided inside the inner sleeve (20), and one end of the screw rod assembly (130) away from the motor assembly (50) extends into the inner support tube (190), and a nut assembly (200) is provided inside the inner support tube (190) for circumferential limiting, and the nut assembly (200) is screwed onto the screw rod assembly (130); a limiting protrusion (191) is also provided on the inner wall of the inner support tube (190) for limiting the axial movement of the nut assembly (200) and separating from the inner support tube (190).

9. The electric tailgate support rod according to claim 8, characterized in that: One end of the spring bushing (160) away from the motor assembly (50) is sleeved on the inner support tube (190), the inner sleeve (20) and one end of the inner support tube (190) away from the motor assembly (50) are fixedly connected with a ball and socket assembly (30), and the strut spring (170) extends between the inner sleeve (20) and the inner support tube (190).

10. The electric tailgate support rod according to claim 1, 2 or 3, characterized in that: An annular groove (131) is provided on the outer peripheral surface of the screw assembly (130), and the screw sealing ring (150) is embedded in the annular groove (131).

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