Automobile tail door supporting rod damper

Abstract

The utility model belongs to the technical field of automobile tail door electric supporting rods, and particularly discloses an automobile tail door supporting rod damper which comprises a shell provided with a first cavity. The pressing sleeve is installed in the first cavity, and an annular groove is formed in the inner wall of the pressing sleeve. The pressing sleeve sleeves the outer side of the friction shaft; a friction bulge matched with the annular groove is arranged on the outer side surface of the friction shaft; the adjusting assembly is installed on the shell and arranged on the surface of the outer side of the pressing sleeve in a sleeving mode, the adjusting assembly exerts pressure on the pressing sleeve in the radial direction, and therefore the friction force between the annular groove and the friction protrusion is adjusted. According to the utility model, the damper is formed by fewer parts, so that the assembly difficulty is reduced, and the assembly production efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric tailgate struts for automobiles, and specifically relates to a tailgate strut damper. Background Technology

[0002] Existing electric tailgate systems for automobiles typically employ a single or dual electric strut drive system for opening and closing. The electric strut mainly comprises key components such as a motor, reducer, damper, lead screw, and strut spring. The power generated by the motor is sequentially transmitted to the reducer and damper, which in turn drives the lead screw to rotate. The lead screw's function is to convert rotational motion into linear motion, thereby enabling the opening and closing of the tailgate.

[0003] To ensure the tailgate can hover stably during opening and closing, a damper is specially designed inside the electric strut to increase drag. This damper effectively prevents the tailgate from accidentally falling during the opening and closing process, thus giving the tailgate excellent hovering performance.

[0004] However, most dampers currently used in electric tailgate struts employ a damping plate and spring design. Specifically, multiple positioning plates, friction plates, and rotating plates are placed into the damper housing in a specific order, and then compressed by springs. However, due to the relatively small and deep space within the damper housing, stacking the components sequentially in this limited space is not only complex and difficult to assemble, but also makes it difficult to ensure the accuracy (placement order) and completeness (excess or missing parts) of the assembly. This assembly method results in low production efficiency and difficulty in guaranteeing product quality. Utility Model Content

[0005] The purpose of this invention is to provide a car tailgate strut damper that uses fewer components to reduce assembly difficulty and improve assembly efficiency and product quality.

[0006] The purpose of this utility model is achieved through the following technical solution: a car tailgate strut damper is provided, comprising:

[0007] The shell has a first cavity;

[0008] A clamping sleeve is installed in the first cavity, and the inner wall of the clamping sleeve is provided with an annular groove;

[0009] The friction shaft has a clamping sleeve fitted on its outer side, and the outer surface of the friction shaft has friction protrusions that mate with the annular groove.

[0010] The adjustment component is installed on the housing and sleeved on the outer surface of the clamping sleeve. It applies radial pressure to the clamping sleeve to adjust the friction between the annular groove and the friction protrusion.

[0011] Preferably, the adjusting assembly includes an open elastic element, a damper cover, and an outer sleeve, with the outer sleeve mounted on the housing; the outer surface of the damper cover is provided with external threads, and the outer sleeve is provided with internal threads that mate with the external threads; the outer side of the clamping sleeve is pressed against the inner wall of the damper cover; and the open elastic element is sleeved on the outer surface of the clamping sleeve.

[0012] Preferably, the damper cover has a pressure surface, and the clamping sleeve has a guide portion that mates with the pressure surface.

[0013] Preferably, the outer surface of the open elastic element has a second opening along the axial direction.

[0014] Preferably, the device includes an elastic element, and the outer casing is provided with a second cavity. The elastic element is disposed in the second cavity, with one end of the elastic element abutting against the inner wall of the second cavity and the other end abutting against the damper cover.

[0015] Preferably, the outer casing is further provided with guide claws, and the housing is provided with slots that mate with the guide claws.

[0016] Preferably, the damper cover has a snap-fit ​​part, and the housing has an annular groove for the snap-fit ​​part to engage.

[0017] Preferably, the top surface of the damper cover is provided with an operating hole.

[0018] Preferably, the bottom of the first cavity is provided with a limiting groove, and the clamping sleeve is provided with a limiting boss that cooperates with the limiting groove.

[0019] Due to the adoption of the above technical solution, this utility model has the following advantages: friction is generated between the outer surface of the friction shaft and the inner wall of the clamping sleeve, which plays a damping role; the adjusting component applies radial pressure to the clamping sleeve, adjusting the inner diameter of the clamping sleeve, thereby adjusting the frictional force between the friction shaft and the clamping sleeve. Compared with the conventional method of using multiple positioning plates, friction plates, and rotating plates, the friction between the friction shaft and the clamping sleeve is simple in structure, easy to assemble, easy to test, and easy to automate assembly, thus improving production efficiency and product quality. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is a schematic diagram of the structure of a car tailgate strut damper according to the present invention;

[0022] Figure 2 This is a schematic diagram of the friction shaft structure;

[0023] Figure 3 This is a schematic diagram of the compression sleeve.

[0024] Figure 4A schematic diagram of the assembled tailgate strut damper;

[0025] Figure 5 This is a schematic diagram of the casing;

[0026] Figure 6 This is a schematic diagram of the damper cover;

[0027] Figure 7 This is an illustration of a coat.

[0028] Figure label:

[0029] 1-Housing shell, 11-Slot, 12-Annular groove, 13-First cavity, 131-Limiting groove, 14-Opening end of housing;

[0030] 2-Adjusting component, 21-Opening elastic element, 211-Second opening, 22-Damper cover, 221-Snap-fit ​​part, 222-Pressure surface, 223-Operating hole, 224-Guide surface, 225-Annular platform, 226-External thread, 227-Opening end of damper cover, 23-Outer sleeve, 231-Guide claw, 232-Second cavity, 233-Limiting surface, 234-Internal thread, 235-Abutting part, 236-Undercut;

[0031] 3-Elastic element;

[0032] 4-Friction shaft, 41-Friction protrusion, 42-Annular groove, 43-Spline;

[0033] 5-Pressure sleeve, 51-Limiting boss, 52-First opening, 53-Sleeve section, 54-Guide section, 55-Annular groove. Detailed Implementation

[0034] Please see Figures 1 to 5 A tailgate strut damper for automobiles includes: a housing 1, an adjustment assembly 2, a friction shaft 4, and a clamping sleeve 5.

[0035] The housing 1 has a first cavity 13; a clamping sleeve 5 is installed in the first cavity 13, and the inner wall of the clamping sleeve 5 has an annular groove 55; the clamping sleeve 5 is sleeved on the outside of the friction shaft 4, and the outer surface of the friction shaft 4 has friction protrusions 41 that cooperate with the annular groove 55; the adjusting component 2 is installed on the housing 1 and sleeved on the outer surface of the clamping sleeve 5, applying radial pressure to the clamping sleeve 5 to adjust the inner diameter of the clamping sleeve 5 and adjust the friction force between the annular groove 55 and the friction protrusions 41. Specifically, the outer surface of the clamping sleeve 5 has a first opening 52 along its axial direction to facilitate the opening or closing of the clamping sleeve 5, thereby facilitating its installation on the friction shaft 4. The annular groove 55 can also be provided at each end, or multiple grooves can be provided along the axial direction on the inner wall of the clamping sleeve 5. The friction shaft 4 is provided with a spline 43 through it along its axial direction, and the external lead screw is installed in the friction shaft 4 through the spline 43. Preferably, multiple friction protrusions 41 are evenly spaced along the axial direction of the friction shaft 4, and adjacent friction protrusions 41 form an annular groove 42.

[0036] In this utility model of a car tailgate strut damper, during use, grease is first applied to the friction protrusions 41 and annular grooves 42 on the outer surface of the friction shaft 4. The annular grooves 42 serve to store the grease. Then, the clamping sleeve 5 is opened and fitted onto the outside of the friction shaft 4. The annular groove 55 engages with the friction protrusions 41 to prevent axial movement of the friction shaft 4. The clamping sleeve 5 is then released to restore its deformation. Next, the clamping sleeve 5 containing the friction shaft 4 is inserted into the first cavity 13. Finally, the adjusting assembly 2 is installed on the housing 1. At this point, the clamping sleeve 5 is installed in the first cavity 13 and within the adjusting assembly 2. When the lead screw matching the spline 43 rotates, causing the friction shaft 4 to rotate, friction is generated between the friction protrusions 41 and the inner wall of the clamping sleeve 5, providing a damping effect. The adjusting assembly 2 applies radial pressure to the clamping sleeve 5, adjusting the inner diameter of the clamping sleeve 5, thereby adjusting the frictional force between the annular groove 55 and the friction protrusions 41. Compared to the conventional method of using multiple positioning plates, friction plates, and rotating plates, the friction shaft 4 and the clamping sleeve 5 have a simpler structure, are easier to assemble, improve production efficiency, and avoid adding or removing parts during assembly.

[0037] Please see Figure 1 , Figure 5 , Figure 6 and Figure 7Furthermore, the adjusting assembly 2 includes an open elastic element 21, a damper cover 22, and an outer sleeve 23. The outer sleeve 23 is mounted on the housing 1. The outer surface of the damper cover 22 has an external thread 226, and the outer sleeve 23 has an internal thread 234 that mates with the external thread 226. The outer side of the clamping sleeve 5 is pressed against the inner wall of the damper cover 22. The open elastic element 21 is sleeved on the outer surface of the clamping sleeve 5. Specifically, the lower part of the clamping sleeve 5 has a sleeve portion 53. The open elastic element 21 is opened and installed on the outside of the sleeve portion 53, and then released to restore its deformation. The open elastic element 21 applies a radial force to the clamping sleeve 5 by its contraction. The damper cover 22 has a snap-fit ​​portion 221, and the housing 1 has an annular groove 12. When the open end 227 of the damper cover is aligned with the open end 14 of the housing, the snap-fit ​​portion 221 is snapped into the annular groove 12. Adjust the engagement amount of the external thread 226 of the damper cover 22 and the internal thread 234 of the outer sleeve 23 according to the damper torque value requirements, control the amount of pressure to control the inner diameter of the clamping sleeve 5, thereby adjusting the friction between the annular groove 55 and the friction protrusion 41.

[0038] Please see Figure 3 and Figure 6 Furthermore, the damper cover 22 is provided with a pressure surface 222, and the clamping sleeve 5 is provided with a guide portion 54 that cooperates with the pressure surface 222. Specifically, the guide portion 54 has a frustum-shaped cross section, which is used to receive the downward force applied by the pressure surface 222 of the damper cover 22 and gradually press the clamping sleeve 5 radially.

[0039] Please see Figure 1 Furthermore, the outer surface of the open elastic member 21 is provided with a second opening 211 along the axial direction. With the second opening 211 provided, the open elastic member 21 can be easily fitted and installed on the outside of the clamping sleeve 5.

[0040] Please see Figure 1 , Figure 5 , Figure 6 and Figure 7Furthermore, it also includes an elastic element 3. The outer sleeve 23 is provided with a second cavity 232, and the elastic element 3 is disposed in the second cavity 232. One end of the elastic element 3 abuts against the inner wall of the second cavity 232, and the other end abuts against the damper cover 22. Specifically, the bottom inner wall of the second cavity 232 is provided with a limiting surface 233, which is a step. The damper cover 22 is provided with a guide surface 224, and the lower part of the external thread 226 is provided with an annular platform 225. One end of the elastic element 3 abuts against the limiting surface 233, and the other end of the elastic element 3 is looped around the outside of the guide surface 224 and abuts against the annular platform 225. During installation, the elastic element 3 is inserted into the limiting surface 233 at the bottom of the second cavity 232; then the open elastic element 21 is opened and installed onto the clamping sleeve 5, and then released to restore its deformation; the open end 227 of the damper cover is aligned with the open end 14 of the housing, and a downward force is applied to the damper cover 22. The elastic element 3 is fitted onto the damper cover 22 through the guide surface 224 and contacts the annular platform 225. During use, the damper cover 22 is compressed to make the snap-fit ​​part 221 snap into the annular groove 12 of the housing 1. The snap-fit ​​part 221 moves in the annular groove 12, while the guide surface 224 passes over the annular groove 12 and is located between the outer side of the slot 11 and the inner diameter of the spring 3, so that the end of the spring 3 smoothly pushes against the annular platform 225 of the damper cover 22. At this time, the external thread 226 and the internal thread 234 at the end of the outer sleeve 23 have not yet engaged. Because the elastic element 3 is compressed, the snap-fit ​​part 221 of the damper cover 22 will not move axially within the annular groove 12.

[0041] Please see Figure 5 and Figure 7 Furthermore, the outer casing 23 is also provided with guide claws 231, and the housing 1 is provided with slots 11 that mate with the guide claws 231. Specifically, the guide claws 231 are strip-shaped elastic buckles, and the guide claws 231 can be made of plastic. Multiple guide claws 231 are provided, spaced apart circumferentially along the end of the outer casing 23. The guide claws 231 include an abutment portion 235 and a buckle 236. In use, the guide claws 231 are aligned and inserted into the slots 11, the abutment portion 235 abuts against the inner wall of the slots 11, and the design of the buckle 236 ensures that the outer casing 23 is securely installed in the housing 1 and will not fall off.

[0042] Please see Figure 3 and Figure 5 The first cavity 13 has a limiting groove 131 at its bottom, and the clamping sleeve 2 has a limiting boss 51 that mates with the limiting groove 131. The limiting boss 51 has a small amount of movement within the limiting groove 131, which satisfies the contraction requirements of the clamping sleeve 5 during operation and prevents the clamping sleeve 5 from rotating. This structure not only provides positioning and quick installation during installation, but also ensures that the clamping sleeve 5 will not rotate after installation.

[0043] Please see Figure 4 , Figure 6 and Figure 7Furthermore, the top surface of the damper cover 22 is provided with an operating hole 223. The operating hole 223 is used to adjust the engagement amount of the external thread 226 and the internal thread 234. When it is necessary to adjust the friction force, the engagement amount of the external thread 226 of the damper cover 22 and the internal thread 234 of the outer sleeve 23 is adjusted according to the damper torque value requirement. The damper cover 22 is rotated through the operating hole 223 to facilitate the engagement of the damper cover 22 and the outer sleeve 23. The damper cover 22 moves up or down by rotating, moving away from or closer to the clamping sleeve 5, and the amount of downward pressure is controlled to control the size of the inner diameter of the clamping sleeve 5. The radial force between the clamping sleeve 5 and the friction shaft 4 is adjusted, thereby adjusting the damping torque.

[0044] This utility model discloses a car tailgate strut damper. The outer surface of the friction shaft 4 is provided with friction protrusions 41, and the inner wall of the clamping sleeve 5 is provided with an annular groove 55. Friction is generated between the friction shaft 4 and the inner wall of the clamping sleeve 5, providing a damping effect. The clamping sleeve 5 prevents the friction shaft 4 from axially moving. The adjusting component 2 applies radial pressure to the clamping sleeve 5, adjusting the inner diameter of the clamping sleeve 5, thereby adjusting the friction force between the annular groove 55 and the friction protrusions 41. Compared with the conventional method of using multiple positioning plates, friction plates, and rotating plates, the friction between the friction shaft 4 and the clamping sleeve 5 is simple in structure, easy to assemble, easy to test, and easy to automate, improving production efficiency. An elastic element 3 is provided in the adjusting component 2. When the elastic element 3 is compressed, the snap-fit ​​portion 221 of the damper cover 22 will not move axially within the annular groove 12. The limiting boss 51 of the clamping sleeve 5 has a small amount of movement within the limiting groove 14, satisfying the contraction requirements of the clamping sleeve 5 during operation and preventing the clamping sleeve 5 from rotating.

[0045] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific implementation method of this utility model and is not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the scope of the spirit of this utility model should be included within the protection scope of this utility model.

Claims

1. A tailgate strut damper for automobiles, characterized in that, include: The shell (1) has a first cavity (13); A clamping sleeve (5) is installed in the first cavity (13), and the inner wall of the clamping sleeve (5) is provided with an annular groove (55); A friction shaft (4) is fitted with a clamping sleeve (5) on the outside of the friction shaft (4). The outer surface of the friction shaft (4) is provided with friction protrusions (41) that mate with an annular groove (55). Adjustment component (2) is installed on housing (1) and sleeved on the outer surface of clamping sleeve (5) to apply radial pressure to clamping sleeve (5) and adjust the friction force between annular groove (55) and friction protrusion (41).

2. The automobile tailgate strut damper according to claim 1, characterized in that, The adjustment assembly (2) includes an open elastic element (21), a damper cover (22) and an outer sleeve (23). The outer sleeve (23) is installed on the housing (1). The outer surface of the damper cover (22) is provided with an external thread (226), and the outer sleeve (23) is provided with an internal thread (234) that mates with the external thread (226). The outer side of the clamping sleeve (5) is pressed against the inner wall of the damper cover (22). The open elastic element (21) is sleeved on the outer surface of the clamping sleeve (5).

3. The automobile tailgate strut damper according to claim 2, characterized in that, The damper cover (22) is provided with a pressure surface (222), and the clamping sleeve (5) is provided with a guide part (54) that cooperates with the pressure surface (222).

4. The automobile tailgate strut damper according to claim 2 or 3, characterized in that, The outer surface of the open elastic element (21) is provided with a second opening (211) along the axial direction.

5. The automobile tailgate strut damper according to claim 2 or 3, characterized in that, Includes an elastic element (3), and the outer sleeve (23) is provided with a second cavity (232). The elastic element (3) is disposed in the second cavity (232). One end of the elastic element (3) abuts against the inner wall of the second cavity (232), and the other end abuts against the damper cover (22).

6. The automobile tailgate strut damper according to claim 4, characterized in that, Includes an elastic element (3), and the outer sleeve (23) is provided with a second cavity (232). The elastic element (3) is disposed in the second cavity (232). One end of the elastic element (3) abuts against the inner wall of the second cavity (232), and the other end abuts against the damper cover (22).

7. The automobile tailgate strut damper according to claim 2, 3 or 6, characterized in that, The outer casing (23) is also provided with guide claws (231), and the housing (1) is provided with slots (11) that mate with the guide claws (231).

8. The automobile tailgate strut damper according to claim 2, 3 or 6, characterized in that, The damper cover (22) is provided with a snap-fit ​​part (221), and the housing (1) is provided with an annular groove (12) that engages with the snap-fit ​​part (221).

9. The automobile tailgate strut damper according to claim 2, 3 or 6, characterized in that, The top surface of the damper cover (22) is provided with an operating hole (223).

10. The automobile tailgate strut damper according to claim 1, 2, 3 or 6, characterized in that, The bottom of the first cavity (13) is provided with a limiting groove (131), and the clamping sleeve (5) is provided with a limiting boss (51) that cooperates with the limiting groove (131).

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