Damper and power tailgate stay

Abstract

The present application relates to a kind of damper and electric tail door stay, wherein the damper includes: shell, fixed seat, cover, rotating seat, elastic member.The shell has the accommodation cavity extending along linear direction;The fixed seat has rotating cavity, and the cross section of rotating cavity is conical;The cover can be moved in the accommodation cavity along linear direction to be away from or close to fixed seat;Rotating seat is rotationally arranged in rotating cavity;One end of elastic member is in abutment with rotating seat, and the other end of elastic member is in abutment with cover.When the damper of the present application is installed in the outer sleeve tube of electric tail door stay, the force of elastic member pressing on rotating seat is adjusted by the cover moving in the accommodation cavity along the linear direction, and then the friction between rotating seat and fixed seat is changed, the relative rotation between rotating seat and fixed seat is adjusted, the friction is generated, the damping torque is generated to screw rod, and the effective internal resistance of electric tail door stay is increased, so that automobile tail door has good hovering effect.

Description

TECHNICAL FIELD

[0001] The present application relates to a damper and an electric tailgate support rod. BACKGROUND

[0002] At present, the electric tailgate support rod is often used when the automobile tailgate is opened and closed. In order to improve the supporting performance of the electric tailgate support rod, a damper is arranged in the outer sleeve tube to improve the damping torque, so that the electric tailgate support rod has good use performance. The traditional damper has a relatively complex structure and many parts, which not only makes the assembly difficult, but also makes the axial length of the damper too long. When the damper is applied to the electric tailgate support rod, the shortest straight length of the electric tailgate support rod is too long, which affects the universality of the electric tailgate support rod. SUMMARY

[0003] The purpose of the present application is to provide a damper and an electric tailgate support rod with simple structure and convenient installation.

[0004] In order to achieve the above purpose, the present application provides a damper, which comprises:

[0005] A housing having a containing cavity extending in a straight line direction;

[0006] A fixed seat fixedly arranged in the containing cavity, the fixed seat having a rotating cavity, the cross section of the rotating cavity being conical, the larger-diameter end of the rotating cavity being a first end, and the smaller-diameter end of the rotating cavity being a second end;

[0007] A cover body movable in the containing cavity along the straight line direction to move away from or close to the fixed seat, the cover body having a through hole for the screw rod to pass through, the second end, the first end and the cover body being arranged in sequence in the straight line direction;

[0008] A rotating seat rotatably arranged in the rotating cavity, the rotating seat having a mounting hole extending in a straight line direction and used for mounting a screw rod;

[0009] An elastic member, one end of the elastic member abutting against the rotating seat, and the other end of the elastic member abutting against the cover body.

[0010] Optionally, the cover body comprises: an outer peripheral plate and a baffle plate; the outer peripheral plate is fixedly connected with the outer side edge of the baffle plate; the inner wall of the containing cavity has an internal thread; the outer wall of the outer peripheral plate has an external thread matched with the internal thread; the baffle plate has the through hole; and the elastic member abuts against the baffle plate.

[0011] Optionally, the cover body further comprises an inner peripheral plate; the inner peripheral plate is fixedly connected with the edge of the through hole and extends in the straight line direction.

[0012] Optionally, the elastic member is a spring; and the inner surrounding plate, the outer surrounding plate and the baffle plate form a clamping groove for accommodating the spring.

[0013] Optionally, the rotating seat has a conical cross section; and the conical surface of the rotating seat is in contact with the side wall of the rotating cavity.

[0014] Optionally, the inner wall of the rotating cavity is coated with a wear-resistant resin layer; and the conical surface of the rotating seat is coated with a wear-resistant resin layer.

[0015] Optionally, the axis of the rotating cavity extends along the straight line direction; and the axis of the through hole extends along the straight line direction.

[0016] Optionally, the inner wall of the accommodating cavity is provided with a plurality of first limiting strips along the straight line direction; the outer wall of the fixed seat is provided with a plurality of first limiting grooves matched with the first limiting strips; and the first limiting strips are clamped in the first limiting grooves.

[0017] An electric tail gate stay rod comprises a screw rod, an outer sleeve and the damper as claimed in any one of the preceding claims; the shell is fixed in the outer sleeve; and the screw rod is connected with the mounting hole along the straight line direction and passes through the through hole.

[0018] Optionally, the mounting hole is provided with a plurality of second limiting strips along the straight line direction; the screw rod is provided with a plurality of second limiting grooves matched with the second limiting strips; and the second limiting strips are clamped in the second limiting grooves.

[0019] Compared with the prior art, the damper and the electric tail gate stay rod according to the embodiments of the present application have the following beneficial effects:

[0020] The cover moves along the straight line direction in the accommodating cavity to move away from or close to the fixed seat, so as to adjust the force of the elastic member pressing on the rotating seat, and then change the friction force between the rotating seat and the fixed seat. When the damper is installed in the outer sleeve of the electric tail gate stay rod, the screw rod of the electric tail gate stay rod is fixedly connected with the mounting hole and passes through the through hole, the screw rod is connected with the output end of the driving motor, the driving motor drives the screw rod to rotate, and then the screw rod drives the rotating seat to rotate, the fixed seat remains stationary relative to the shell, and the rotating seat and the fixed seat relatively rotate to generate a friction force, thereby generating a damping torque on the screw rod, increasing the effective internal resistance of the electric tail gate stay rod, and making the automobile tail gate have a good hovering effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a sectional view of the embodiment of the present application;

[0022] Figure 2 is a structural schematic view of the shell in the embodiment of the present application;

[0023] Figure 3 is an exploded schematic view of the fixed seat and the rotating seat in the embodiment of the present application;

[0024] Figure 4 is a schematic view of the connection relationship between the cover and the elastic member in the embodiment of the present application;

[0025] Figure 5 is a schematic view of the internal structure of the shell in the embodiment of the present application.

[0026] In the figure, 1, shell; 11, accommodating cavity; 111, internal thread; 2, fixed seat; 21, rotating cavity; 22, first limiting groove; 3, cover; 31, perforation; 32, peripheral plate; 321, external thread; 33, baffle; 34, inner peripheral plate; 4, rotating seat; 41, mounting hole; 5, elastic member; 6, first limiting strip; 7, second limiting strip. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0028] First of all, it needs to be pointed out that the top, bottom, upward, downward and other orientations mentioned in this text are defined with respect to the direction in each figure, which are relative concepts and thus can change according to different positions and different practical states. Therefore, these or other orientations should not be used as restrictive terms.

[0029] It should be noted that the term "comprising" does not exclude other elements or steps, and "one" or "an" does not exclude a plurality.

[0030] In addition, it should also be pointed out that for any single technical feature described or implied in the embodiments herein, or any single technical feature shown or implied in the drawings, combinations between these technical features (or their equivalents) can still be continued, so as to obtain other embodiments of the present application which are not directly mentioned in this text.

[0031] In addition, it should also be understood that the terms "first", "second" and the like are used herein to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information, and similarly, the "second" information can also be referred to as "first" information without departing from the scope of the present application.

[0032] It should be noted that in different figures, the same reference numerals represent the same or substantially the same components.

[0033] As Figure 1 , Figure 3 shown in the drawings, a damper of the preferred embodiment of the present application comprises a shell 1, a fixed seat 2, a cover 3, a rotating seat 4, and an elastic member 5. The shell 1 has a receiving cavity 11 extending in a straight line. The fixed seat 2 is fixedly arranged in the receiving cavity 11, and has a rotating cavity 21. The rotating cavity 21 is tapered in cross section, with a first end having a larger diameter and a second end having a smaller diameter. The cover 3 is movable in the receiving cavity 11 in the straight line direction to move away from or approach the fixed seat 2, and has a through hole 31 through which a screw rod passes. In the straight line direction, the second end, the first end, and the cover 3 are arranged in sequence. The rotating seat 4 is rotatably arranged in the rotating cavity 21, and has a mounting hole 41 extending in a straight line and used for mounting the screw rod. One end of the elastic member 5 abuts against the rotating seat 4, and the other end of the elastic member 5 abuts against the cover 3.

[0034] Based on the above structure, the cover 3 is moved in the receiving cavity 11 in the straight line direction to move away from or approach the fixed seat 2, so as to adjust the force of the elastic member 5 pressing on the rotating seat 4, and further change the friction force between the rotating seat 4 and the fixed seat 2. When the damper of the present application is installed in the outer sleeve of an electric tail gate support rod, the screw rod of the electric tail gate support rod is fixedly connected with the mounting hole 41 and passes through the through hole 31. The screw rod is connected with the output end of a driving motor, the driving motor drives the screw rod to rotate, and further drives the rotating seat 4 to rotate. The fixed seat 2 remains stationary relative to the shell 1, and the rotating seat 4 rotates relative to the fixed seat 2 to generate a friction force, thereby generating a damping torque on the screw rod, increasing the effective internal resistance of the electric tail gate support rod, and making the automobile tail gate have a good hovering effect.

[0035] Specifically, the elastic member 5 can be a compression spring, a wave spring, or other elastic structures that can be stretched. The rotating seat 4 and the fixed seat 2 are made of carbon fiber material after heat treatment, have a high carbon content, are light in weight, and have high strength.

[0036] Further, referring to Figure 4 , the cover 3 comprises a peripheral plate 32 and a baffle 33. The peripheral plate 32 is fixedly connected with the outer side of the baffle 33. The inner wall of the receiving cavity 11 has an internal thread 111. The outer wall of the peripheral plate 32 has an external thread 321 matched with the internal thread 111, and the cover 3 is moved in the receiving cavity 11 in the straight line direction through the threaded connection of the external thread 321 and the internal thread 111. The baffle 33 has the through hole 31 for avoiding the screw rod. The elastic member 5 abuts against the baffle 33.

[0037] Further, referring toFigure 4 The cover 3 further comprises an inner surrounding plate 34. The inner surrounding plate 34 is fixedly connected with the edge of the through hole 31 and extends along the straight line direction, and the screw rod passes through the through hole 31 in the inner surrounding plate 34.

[0038] Further, the elastic member 5 is a spring. The inner surrounding plate 34, the outer surrounding plate 32 and the baffle 33 form a clamping groove for accommodating the spring. The spring is sleeved outside the inner surrounding plate 34 and located inside the outer surrounding plate 32.

[0039] Further, the cross section of the rotating seat 4 is conical. The conical surface of the rotating seat 4 is in contact with the side wall of the rotating cavity 21.

[0040] The angle of the cone needs to be selected according to actual needs.

[0041] Further, the inner wall of the rotating cavity 21 is coated with a wear-resistant resin layer, and the conical surface of the rotating seat 4 is coated with a wear-resistant resin layer. Specifically, the wear-resistant resin layer can be uniformly attached to the surface of the carbon fiber substrate by compounding carbon fiber material with wear-resistant resin (such as epoxy resin, phenolic resin or polytetrafluoroethylene, etc.). This can further improve the wear resistance of the rotating seat 4 and the fixed seat 2, and the service life of the damper. In addition, the resin uniformly attached to the surface of the carbon fiber layer has stable performance, can output stable damping torque after friction, has small positive and negative torque difference, and can make the electric tail door support rod run more smoothly, without jamming, and has better hovering effect.

[0042] Further, the axis of the rotating cavity 21 extends along the straight line direction, and the axis of the through hole 31 extends along the straight line direction, so that the screw rod can pass through the mounting hole 41, the spring intermediate hole and the through hole 31 in sequence to form a space for avoiding the screw rod, so that the volume of the damper of the application is smaller.

[0043] Further, referring to Figure 5 The inner wall of the accommodating cavity 11 is provided with a plurality of first limiting strips 6 along the straight line direction. The outer wall of the fixed seat 2 is provided with a plurality of first limiting grooves 22 matched with the first limiting strips 6. The first limiting strips 6 are clamped in the first limiting grooves 22. The fixed seat 2 of the application is fixedly arranged in the accommodating cavity 11. In order to avoid relative rotation between the fixed seat 2 and the shell 1, the first limiting strips 6 and the first limiting grooves 22 are arranged to fix the fixed seat 2, so as to avoid the circumferential rotation of the fixed seat 2 relative to the shell 1.

[0044] The application further provides an electric tail door support rod, which comprises a screw rod, an outer sleeve and a damper. The shell 1 is fixedly arranged in the outer sleeve. The screw rod is connected with the mounting hole 41 along the straight line direction and passes through the through hole 31.

[0045] The specific structure of the damper described above can refer to all the embodiments described above. Since the electric tail gate support rod adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the above technical solutions, which will not be described one by one here.

[0046] Further, referring to Figure 3 The screw rod is provided with a plurality of second limiting grooves matched with the second limiting strips 7. The second limiting strips 7 are clamped in the second limiting grooves. The arrangement of the second limiting strips 7 and the second limiting grooves ensures that the rotating seat 4 and the screw rod remain stationary, and the transmission connection between the rotating seat 4 and the screw rod is reliable and has high transmission efficiency.

[0047] In summary, the damper and the electric tail gate support rod provided by the embodiments of the present application adjust the force of the elastic member 5 pressing on the rotating seat 4 by moving the cover 3 in the linear direction in the accommodating cavity 11 to move away from or close to the fixed seat 2, thereby changing the friction between the rotating seat 4 and the fixed seat 2. When the damper of the present application is installed in the outer sleeve of the electric tail gate support rod, the screw rod of the electric tail gate support rod is fixedly connected with the mounting hole 41 and passes through the perforation 31, the screw rod is connected with the output end of the driving motor, the driving motor drives the screw rod to rotate, thereby driving the rotating seat 4 to rotate, the fixed seat 2 remains stationary relative to the shell 1, and the rotating seat 4 and the fixed seat 2 relatively rotate to generate a friction force, thereby generating a damping torque on the screw rod, increasing the effective internal resistance of the electric tail gate support rod, and making the automobile tail gate have a good hovering effect.

[0048] The above only describes the preferred embodiments of the present application. It should be noted that for ordinary skilled persons in the technical field, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application.

Claims

1. An electric tailgate strut, characterized in that, include: The screw, the outer sleeve, and the damper; the damper includes: A housing, which is fixed inside the outer sleeve; The housing has a receiving cavity extending in a straight direction, and the inner wall of the receiving cavity is provided with a plurality of first limiting strips in a straight direction. The fixed base has multiple first limiting grooves on its outer wall that are adapted to the first limiting strip. The first limiting strip is engaged in the first limiting grooves so that the fixed base is fixedly disposed in the receiving cavity. The fixed base has a rotating cavity, and the inner wall of the rotating cavity is coated with a wear-resistant resin layer. The cross-section of the rotating cavity is conical, with the end of the rotating cavity with a larger diameter being the first end and the end of the rotating cavity with a smaller diameter being the second end. A cover body that can move within the accommodating cavity along the linear direction to move away from or towards the fixing seat, the cover body having a through hole through which a screw can pass, and the second end, the first end, and the cover body being arranged sequentially in the linear direction; A rotating seat has a tapered cross-section, and the tapered surface of the rotating seat is coated with a wear-resistant resin layer. The rotating seat is rotatably disposed in the rotating cavity, and the tapered surface of the rotating seat contacts the side wall of the rotating cavity, so that the rotating seat and the fixed seat rotate relative to each other to generate friction. The rotating seat has a mounting hole extending in a straight direction for mounting a screw. The screw is connected to the mounting hole along the straight direction and passes through the through hole. An elastic element, one end of which abuts against the rotating seat, and the other end of which abuts against the cover.

2. The electric tailgate support rod according to claim 1, characterized in that, The cover includes: an outer plate and a baffle; the outer plate is fixedly connected to the outer side of the baffle; the inner wall of the accommodating cavity has an internal thread; the outer wall of the outer plate has an external thread adapted to the internal thread; the baffle has the through hole; the elastic element abuts against the baffle.

3. The electric tailgate strut according to claim 2, characterized in that, The cover also includes an inner cladding plate; the inner cladding plate is fixedly connected to the edge of the perforation and extends along the straight line direction.

4. The electric tailgate strut according to claim 3, characterized in that, The elastic element is a spring; the inner plate, the outer plate, and the baffle are arranged together to form a groove for accommodating the spring.

5. The electric tailgate strut according to claim 1, characterized in that, The axis of the rotating cavity extends along the straight line direction; the axis of the perforation extends along the straight line direction.

6. The electric tailgate strut according to claim 1, characterized in that, The mounting hole is provided with a plurality of second limiting strips along a straight direction; the screw is provided with a plurality of second limiting grooves that are adapted to the second limiting strips; the second limiting strips are engaged in the second limiting grooves.

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