Buffer device

Abstract

The present invention provides a buffer device. The buffer device includes: a base, which defines a receiving cavity along the longitudinal direction, the receiving cavity having a first engaging portion; a buffer pin, which has a pin body suitable for being inserted into the receiving cavity, the pin body having a second engaging portion; and a locking bushing, which is fixed to the base; the pin body can rotate between the initial adjustment and locking positions relative to the receiving cavity in the receiving cavity; in the initial adjustment position, the first engaging portion is not engaged with the second engaging portion to allow the pin body to move in the longitudinal direction; when the pin body rotates from the initial adjustment position to the locking position, the first engaging portion is engaged with the second engaging portion and drives the pin body to move away from the base in the longitudinal direction; in the locking position, the pin body is locked by the locking bushing; the locking bushing includes a first locking portion, which can be positioned in at least two circumferential directions relative to the receiving cavity to lock the pin body in at least two locking positions. The buffer device allows the buffer spacing to be adjusted according to actual application requirements.

Description

Technical Field

[0001] The present invention generally relates to the technical field of cushioning devices, and in particular to adjustable cushioning devices. Background Art

[0002] Usually, when the door parts of a vehicle such as the trunk door, hood and door are closed, a small gap will be formed between the vehicle body and the door parts. As a result, during the driving of the vehicle, the door parts will repeatedly collide with the vehicle body due to vibration and bumps, causing abnormal noise and affecting the user experience. In order to avoid the noise caused by these gaps, buffers are usually installed on the vehicle body.

[0003] Usually, the buffer has an abutment surface suitable for abutting against the door component to provide buffering. During the installation process of the buffer, usually, the abutment surface of the buffer is first pushed by normally closing the door component so that the abutment surface of the buffer is in a reference position, and then on this basis, the abutment surface is further raised by a certain buffering distance so that when the door component is normally closed, it can be closely abutted against the abutment surface of the buffer to provide a better buffering effect. However, existing buffers are usually designed to provide a fixed buffering distance. In fact, for different vehicle models and different use positions of the buffer, it is often necessary to provide different buffering distances to achieve a better buffering effect, which requires opening multiple sets of molds to produce buffers of different specifications, which significantly increases the production and manufacturing costs and the cost of use. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the above-mentioned prior art and to provide an improved adjustable buffer.

[0005] To this end, the present invention provides a buffer device, which includes: a base, the base includes a receiving cavity along the longitudinal direction, the inner peripheral surface of the receiving cavity is provided with a first engaging portion; a buffer pin, the buffer pin has a pin body, the pin body is suitable for being inserted into the receiving cavity along the longitudinal direction, and the outer peripheral surface of the pin body is provided with a second engaging portion matching the first engaging portion; and a locking bushing, the locking bushing is at least partially arranged in the receiving cavity along the longitudinal direction and is fixed to the base; wherein the pin body is capable of rotating in the receiving cavity between an initial adjustment position and a locking position relative to the receiving cavity; in the initial adjustment position , the first engaging portion and the second engaging portion are not engaged to allow the pin body to move along the longitudinal direction; when the pin body rotates from the initial adjustment position to the locking position, the first engaging portion and the second engaging portion engage with each other and drive the pin body to move along the longitudinal direction away from the accommodating cavity; in the locking position, the pin body is locked by the locking bushing to prevent the pin body from rotating relative to the accommodating cavity; wherein the locking bushing includes a first locking portion for locking the pin body, and the first locking portion can be positioned in at least two circumferential directions relative to the accommodating cavity to allow the pin body to be locked in at least two locking positions.

[0006] By making the circumferential position of the first locking portion of the locking bushing variable relative to the accommodating cavity, the buffer pin can be rotated to different angles to reach the locking position after the initial adjustment of the longitudinal position of the buffer pin, while the pin body is moved different distances away from the accommodating cavity (i.e., away from the base), thereby obtaining different buffer spacings to meet different application requirements.

[0007] According to the above technical concept, the present invention may further include any one or more of the following optional forms.

[0008] In some optional forms, when the pin body rotates from the initial adjustment position to the locking position, the distance that the pin body moves along the longitudinal direction is positively correlated with the rotation angle of the pin body.

[0009] In some optional forms, the first engaging portion and the second engaging portion are both in the form of threads, the first engaging portion extends along a partial circumference of the inner circumferential surface of the accommodating cavity, and the second engaging portion extends along a partial circumference of the outer circumferential surface of the pin body.

[0010] In some optional forms, the locking bushing is provided with a positioning protrusion protruding outward in the transverse direction; at least two positioning grooves matching the positioning protrusion are provided on the circumferential wall of the accommodating cavity at intervals in the circumferential direction; the positioning protrusion is adapted to engage with the positioning groove to position the locking bushing relative to the accommodating cavity in at least two circumferential directions. By positioning the locking bushing relative to the accommodating cavity in at least two circumferential directions, the first locking portion is positioned relative to the accommodating cavity in at least two circumferential directions.

[0011] In some optional forms, the locking bushing is provided with an elastic positioning cantilever extending along the longitudinal direction, and the positioning cantilever is provided with the positioning convex part; the at least two positioning grooves of the accommodating cavity penetrate the circumferential wall of the accommodating cavity; the positioning convex part is adapted to engage with the positioning groove to prevent the locking bushing from rotating relative to the accommodating cavity and moving along the longitudinal direction. This structure simultaneously realizes the circumferential positioning of the locking bushing relative to the accommodating cavity and the fastening between the locking bushing and the base.

[0012] In some optional forms, the positioning protrusion of the locking bushing is arranged on the outer peripheral surface of the locking bushing; the at least two positioning grooves of the accommodating cavity are arranged on the inner peripheral surface of the accommodating cavity and extend from one end of the accommodating cavity along the longitudinal direction; the positioning protrusion is adapted to engage with the positioning groove to prevent the locking bushing from rotating relative to the accommodating cavity. This configuration realizes the circumferential positioning of the locking bushing relative to the accommodating cavity.

[0013] In some optional forms, the buffer device further includes a fixing bushing, which is elastically sleeved on the outside of the locking bushing and fixes the locking bushing to the accommodating cavity.

[0014] In some optional forms, the fixing bushing is provided with barbs protruding outwardly in a lateral direction, so as to fix the locking bushing to the accommodating cavity.

[0015] In some optional forms, the buffer pin includes an elastic locking cantilever extending along the longitudinal direction, the locking cantilever is connected to the pin body, and the locking cantilever is provided with a second locking portion matching the first locking portion of the locking bushing, the first locking portion of the locking bushing is suitable for engaging with the second locking portion on the locking cantilever to lock the pin body in the locking position.

[0016] In some optional forms, the first locking portion is in the form of a slot, which is provided on the circumferential wall of the locking bushing and extends in the longitudinal direction; the second locking portion is in the form of a protrusion. By providing the first locking portion extending in the longitudinal direction, the pin body can be further rotated to a locking position where the second locking portion of the pin body engages with the first locking portion of the locking bushing even when the pin body is in different longitudinal positions after initial commissioning.

[0017] In some optional forms, the locking cantilever of the buffer pin is aligned with the second engaging portion in the longitudinal direction. This arrangement ensures that when the pin body is in the initial adjustment position, the locking cantilever does not mechanically interfere with the first engaging portion of the accommodating cavity to allow the pin body to move in the longitudinal direction.

[0018] In some optional forms, the buffer pin includes an elastic retaining cantilever extending along the longitudinal direction, the retaining cantilever is connected to the pin body, and the retaining cantilever is provided with a retaining tooth portion matching the first engaging portion of the accommodating cavity; when the pin body is in the initial adjustment position, the retaining tooth portion of the retaining cantilever is suitable for engaging with the first engaging portion of the accommodating cavity to retain the pin body in the accommodating cavity.

[0019] In some optional forms, the accommodating cavity has two first engaging portions arranged on opposite sides in the transverse direction, and the pin body correspondingly has two second engaging portions arranged on opposite sides in the transverse direction, wherein the retaining cantilever is located between the two second engaging portions in the circumferential direction.

[0020] In some optional forms, the buffer pin further has a buffer head for providing buffering, and the buffer head is connected to the pin body.

[0021] The buffer device according to the present invention allows the buffer spacing to be adjusted according to actual application requirements, and can meet the usage requirements of different vehicle models and different positions of the vehicle. Compared with the buffer device with non-adjustable buffer spacing, there is no need to open multiple sets of molds to produce buffers of different specifications, which greatly reduces the production and manufacturing costs and the use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features and advantages of the present invention will be better understood through the following detailed description of the optional embodiments in conjunction with the accompanying drawings, in which the same reference numerals identify the same or similar components, wherein:

[0023] Figure 1 is a perspective view of a buffer device according to an exemplary embodiment of the present invention;

[0024] Figure 2 yes Figure 1A cross-sectional view of a buffer device;

[0025] Figure 3A yes Figure 1 A three-dimensional diagram of a buffer pin of a buffer device;

[0026] Figure 3B yes Figure 3A A front view of a buffer pin;

[0027] Figure 3C yes Figure 3A A side view of a buffer pin;

[0028] Figure 3D yes Figure 3A A bottom view of a buffer pin;

[0029] Figure 4A yes Figure 1 A three-dimensional view of a base of a buffer device;

[0030] Figure 4B yes Figure 4A A top view of the base;

[0031] Figure 4C yes Figure 4A A bottom view of the base;

[0032] Figure 4D is along Figure 4C A cross-sectional view taken along line AA in FIG.

[0033] Figure 5A yes Figure 1 A three-dimensional view of a locking bushing and a fixing bushing of a buffer device;

[0034] Figure 5B yes Figure 5A A perspective view of a locking bushing;

[0035] Figure 5C yes Figure 5A A three-dimensional view of a fixed bushing;

[0036] Fig. 6A and Figure 6B are three-dimensional views of a base of a buffer device according to another exemplary embodiment of the present invention viewed from different angles; and

[0037] Fig. 7A and Figure 7B The three-dimensional views respectively show a locking bushing of a buffer device according to another exemplary embodiment of the present invention viewed from different angles. DETAILED DESCRIPTION

[0038] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely exemplary of specific ways to implement and use the invention and are not intended to limit the scope of the invention. When describing the structural positions of the various components, such as up, down, top, bottom, etc., the directional expressions are not absolute, but relative. When the various components are arranged as shown in the figure, these directional expressions are appropriate, but when the positions of the various components in the figure change, these directional expressions also change accordingly.

[0039] In the present invention, the longitudinal direction of a component refers to the direction along the length of the component, the transverse direction of a component refers to the direction perpendicular to the longitudinal direction of the component, and the circumferential direction of a component refers to the direction along the circumference of the component. The longitudinal direction of a cylindrical or annular component refers to the direction along the length of the component, the radial direction of the component refers to the direction along the diameter of the component, and the circumferential direction of the component refers to the direction along the circumference of the component.

[0040] Figures 1 to 5C The buffer device 100 and its components according to an embodiment of the present invention are shown. The buffer device 100 can be used, for example, to provide buffering between a door component (including but not limited to a trunk door, a vehicle door, and a hood) of a vehicle and a vehicle body.

[0041] Reference Figure 1 and Figure 2 The buffer device 100 mainly includes: a base 102, a buffer pin 104 and a locking bushing 106. The base 102 includes a L The buffer pin 104 has a buffer head 112 and a pin body 114 connected to each other, and the pin body 114 is suitable for being connected to each other along the longitudinal direction D. L Inserted into the accommodating cavity 108, the outer peripheral surface of the pin body 114 is provided with a second engaging portion 116 matching the first engaging portion 110. The locking bushing 106 is arranged along the longitudinal direction D L The pin body 114 is at least partially arranged in the receiving cavity 108 and is fixed to the base 102. The pin body 114 can rotate in the receiving cavity 108 relative to the receiving cavity 108 between an initial adjustment position and a locking position; in the initial adjustment position, the first engaging portion 110 and the second engaging portion 116 are not engaged to allow the pin body 114 to rotate along the longitudinal direction D L When the pin body 114 rotates from the initial adjustment position to the locked position, the first engagement portion 110 and the second engagement portion 116 engage with each other and drive the pin body 114 along the longitudinal direction D LMove away from the accommodating cavity 108; in the locked position, the pin body 114 is locked by the locking bushing 106 to prevent the pin body 114 from rotating relative to the accommodating cavity 108; wherein the locking bushing 106 includes a first locking portion 118 for locking the pin body 114, and the first locking portion 118 can be positioned in at least two circumferential directions relative to the accommodating cavity 108 to allow the pin body 114 to be locked in at least two locking positions.

[0042] Specifically, refer to Figure 1 as well as FIG. 4A to FIG. 4D In the illustrated embodiment, the base 102 may include a substantially cylindrical accommodating cavity 108 and an annular boss 120. The accommodating cavity 108 has a first end 122 and a second end 124 in the longitudinal direction. The annular boss 120 may protrude outwardly from the outer peripheral surface of the accommodating cavity 108 in a transverse direction (in the illustrated embodiment, a radial direction). The base 102 may be fixed to the vehicle body by means of the annular boss 120.

[0043] As schematically shown, the accommodating cavity 108 may have two first engaging portions 110, which are arranged on opposite sides in the radial direction at the first end 122 of the accommodating cavity 108. As schematically shown, the first engaging portion 110 may be in the form of a thread and extend along a partial circumference of the inner circumferential surface of the accommodating cavity 108. Optionally, each first engaging portion 110 extends along a quarter of the circumference of the inner circumferential surface of the accommodating cavity 108, in other words, each first engaging portion 110 has a central angle of 90 degrees from the perspective of a cross section.

[0044] Reference FIG. 3A to FIG. 3D In the illustrated embodiment, the buffer head 112 of the buffer pin 104 may be in a plate shape, such as an oblong plate shape. The buffer head 112 is suitable for abutting against, for example, a door component of a vehicle to provide buffering for the door component. The buffer head 112 may be combined with a buffer cap (not shown) made of an elastic material (e.g., TPE material) to provide a better buffering effect.

[0045] The pin body 114 of the buffer pin 104 may have a proximal end 126 relatively close to the buffer head 112 and a distal end 128 relatively far from the buffer head 112 (see FIG. Figure 3C The pin body 114 may have a substantially oblong cross-section, and the pin body 114 includes two arc sections 130 and two flat sections 132 located on opposite sides in the transverse direction (see FIG. Figure 3A and Figure 3D ).

[0046] As schematically shown, at the proximal end 126 of the pin body 114, the two arcuate sections 130 are each provided with a second engagement portion 116. The second engagement portion 116 may be in the form of a thread and extend along the circumferential direction of the arcuate section 130. Optionally, each second engagement portion 116 has a central angle of 90 degrees from a cross-sectional perspective.

[0047] In the illustrated embodiment, each flat section 132 is provided with a L The retaining cantilever 134 is an extended elastic retaining cantilever. One end of the retaining cantilever 134 is connected to the flat section 132, and the other end (free end) of the retaining cantilever 134 is provided with a retaining tooth portion 136 matching the first engaging portion 110 of the accommodating cavity 108. The retaining tooth portion 136 can, for example, have an inclined configuration matching the first engaging portion 110 in the form of a thread, so that: on the one hand, the retaining tooth portion 136 can be engaged with the thread of the first engaging portion 110 of the accommodating cavity 108 when the pin body 114 is in the initial adjustment position to retain the pin body 114 in the accommodating cavity 108; on the other hand, the retaining tooth portion 136 can slide away from the first engaging portion 110 along the thread of the first engaging portion 110 as the pin body 114 rotates from the initial adjustment position toward the locking position, so as not to hinder the rotation of the pin body 114 and the engagement of the first engaging portion 110 with the second engaging portion 116. Each retaining cantilever 134 is located between the two second engaging portions 116 in the circumferential direction.

[0048] Combined with reference Figure 1 (wherein the pin body 114 is in the initial adjustment position), the flat section 132 of the pin body 114 faces the first engaging portion 110 of the accommodating cavity 108, the arc section 130 of the pin body 114 (specifically, the second engaging portion 116 of the pin body 114) and the first engaging portion 110 of the accommodating cavity 108 are staggered from each other, and the buffer pin 104 can be moved along the longitudinal direction D under the action of external force. L When the external force is removed, the pin body 114 can be held in the accommodating cavity 108 by the engagement of the holding teeth 136 on the cantilever arm 134 with the first engaging portion 110 of the accommodating cavity 108 .

[0049] In the initial adjustment position of the pin body 114, the buffer pin 104 (specifically, the buffer head 112 of the buffer pin 104) can be pushed, for example, by closing the door component, so that the buffer pin 104 moves to a reference position (i.e., a position where there is just no gap between the door component and the buffer head 112) to achieve initial adjustment of the buffer pin 104.

[0050] Here, the initial adjustment position of the pin body 114 refers to a position where the first engaging portion 110 and the second engaging portion 116 are not engaged to allow the longitudinal position of the pin body 114 to be initially adjusted by pushing the buffer pin 104. Therefore, it can be understood that the aforementioned reference position is a specific case of the initial adjustment position.

[0051] When the pin body 114 rotates from the initial adjustment position (eg, the aforementioned reference position) to the locking position, the first engagement portion 110 and the second engagement portion 116 engage with each other and drive the pin body 114 to rotate in the longitudinal direction D L Movement away from the receiving cavity 108 allows the longitudinal position of the buffer pin 104 to be readjusted to obtain the desired buffer spacing.

[0052] Although the first engaging portion 110 and the second engaging portion 116 are both in the form of threads in the illustrated embodiment, it is understood that the first engaging portion 110 and the second engaging portion 116 may have other suitable forms. For example, the first engaging portion 110 of the accommodating cavity 108 may be in the form of a spiral groove, and the second engaging portion 116 of the pin body 114 may be in the form of a lug that matches the spiral groove, and the lug may move along the spiral groove, so that the accommodating cavity 108 and the pin body 114 may undergo relative longitudinal displacement while rotating relative to each other.

[0053] Reference Figure 2 , Figure 5B as well as Fig. 7A and Figure 7B The locking bushing 106 is substantially cylindrical in shape and is disposed at the second end 124 of the accommodating cavity 108. The first locking portion 118 of the locking bushing 106 is in the form of a slot, which is disposed on the circumferential wall of the locking bushing 106 and extends in the longitudinal direction D L extend.

[0054] Accordingly, combined with reference FIG. 3A to FIG. 3D The buffer pin 104 is provided with a second locking portion 138 that matches the first locking portion 118 of the locking bushing 106. Specifically, in the illustrated embodiment, at the distal end 128 of the pin body 114, a second locking portion 138 is provided along the longitudinal direction D L The locking cantilever arm 140 is extended elastically. Optionally, the locking cantilever arm 140 is located at the arc section 130 of the pin body 114 and is aligned with the second engaging portion 116 in the longitudinal direction D L One end of the locking cantilever arm 140 is connected to the pin body 114, and the other end (free end) is provided with a second locking portion 138 in the form of a projection. The slot 118 of the locking bushing 106 is adapted to engage with the projection 138 on the locking cantilever arm 140 to lock the pin body 114 in the locked position.

[0055] Optionally, the locking bushing 106 includes two slots 118 symmetrically arranged in the transverse direction (radial direction in the illustrated embodiment), and the buffer pin 104 correspondingly includes two locking cantilever arms 140 having protrusions 138 .

[0056] Continue to refer to Figure 2 In the initial adjustment position (specifically, the aforementioned reference position), the protrusion 138 on the locking cantilever 140 abuts against the inner circumferential surface of the locking bushing 106. At this time, the pin body 114 can be rotated from the initial adjustment position until the protrusion 138 on the locking cantilever 140 engages with the groove 118 of the locking bushing 106, thereby locking the pin body 114 in the locking position to prevent the buffer pin 104 from further rotating relative to the accommodating cavity 108.

[0057] As described above, when the pin body 114 rotates from the initial adjustment position to the locking position, the first engagement portion 110 and the second engagement portion 116 engage with each other and drive the pin body 114 to rotate in the longitudinal direction D L The pin body 114 moves away from the accommodation cavity 108. The distance the pin body 114 moves is positively correlated with the rotation angle of the pin body 114.

[0058] For example, for an embodiment in which both the first engaging portion 110 and the second engaging portion 116 are in the form of threads and have a central angle of 90 degrees, once the pin body 114 leaves the initial adjustment position, the first engaging portion 110 and the second engaging portion 116 begin to engage with each other and drive the pin body 114 to move away from the accommodating cavity 108, and the distance moved by the pin body 114 will be proportional to the rotation angle of the pin body 114 (the proportional coefficient depends on the pitch of the thread).

[0059] In this way, the moving distance of the pin body 114 during readjustment can be changed by changing the angle of rotation required for the pin body 114 to rotate from the initial adjustment position to the locking position, thereby obtaining a desired buffer spacing. The specific implementation method will be described in detail below.

[0060] Reference Figures 4C to 5C as well as 6A to 7B The locking bushing 106 is provided with positioning protrusions 142a, 142b protruding outward in the radial direction. At least two positioning grooves 144a, 144b matching the positioning protrusions 142a, 142b are provided on the circumferential wall of the accommodating cavity 108 at intervals in the circumferential direction. The positioning protrusions 142a, 142b are suitable for engaging with the positioning grooves 144a, 144b to position the locking bushing 106 relative to the accommodating cavity 108 in at least two circumferential directions.

[0061] As exemplarily shown, the locking bushing 106 may include a pair of positioning protrusions 142a, 142b symmetrically arranged in the radial direction, and at least two pairs of positioning grooves 144a, 144b matching the positioning protrusions 142a, 142b are correspondingly arranged on the circumferential wall of the accommodating cavity 108 at intervals along the circumferential direction.

[0062] exist Figures 4C to 5C In the illustrated embodiment, the positioning protrusion 142a of the locking bushing 106 is disposed on the outer peripheral surface of the locking bushing 106. The positioning groove 144a of the accommodating cavity 108 is disposed on the inner peripheral surface of the accommodating cavity 108 and extends from the second end 124 of the accommodating cavity 108 along the longitudinal direction D L The positioning protrusion 142 a is adapted to engage with the positioning groove 144 a to prevent the locking bushing 106 from rotating relative to the accommodating cavity 108 , thereby achieving circumferential positioning of the locking bushing 106 relative to the accommodating cavity 108 .

[0063] In the illustrated embodiment, the buffer device 100 may further include a fixing bushing 146, which is elastically sleeved on the outside of the locking bushing 106 and fixes the locking bushing 106 to the accommodating cavity 108. Specifically, the fixing bushing 146 may be provided with barbs 148 protruding outward in a transverse direction (in the illustrated embodiment, in a radial direction) to fix the locking bushing 106 to the accommodating cavity 108. Optionally, the fixing bushing 146 may be made of metal.

[0064] exist 6A to 7B In the illustrated embodiment, the locking bushing 106 is provided with a plurality of L The positioning cantilever 150 is provided with a positioning protrusion 142b. The positioning groove 144b of the accommodating cavity 108 penetrates the circumferential wall of the accommodating cavity 108. The positioning protrusion 142b is adapted to engage with the positioning groove 144b to prevent the locking bushing 106 from rotating relative to the accommodating cavity 108 and from rotating along the longitudinal direction D. L Movement is performed to achieve circumferential positioning of the locking bushing 106 relative to the accommodating cavity 108 and fastening between the locking bushing 106 and the base 102 .

[0065] When assembling the base 102 and the locking bushing 106, the positioning protrusions 142a and 142b are engaged with the positioning grooves 144a and 144b in different directions, so that the circumferential direction of the first locking portion 118 relative to the accommodating cavity 108 can be changed, thereby achieving different buffering distances as described above. Figure 4AThe outer peripheral surface of the accommodating cavity 108 may also be provided with a plurality of indicating portions 152, each indicating portion 152 corresponding to a position of a positioning groove or a pair of positioning grooves 144a in the radial direction, and further corresponding to a buffering distance. In this way, after determining the required buffering distance, the base 102 and the locking bushing 106 are assembled according to the indication of the indicating portion 152, and the required buffering distance can be obtained by rotating the buffering pin 104 to make the pin body 114 reach the locking position after the initial adjustment of the buffering pin 104.

[0066] Combine the following Figures 1 to 7B The installation and use of the buffer device 100 according to the present invention are described. First, the receiving cavity 108 of the base 102 and the locking bushing 106 are positioned and fixed in corresponding circumferential orientations according to the required buffer spacing, and then the base 102 is fixed to the vehicle body. Then, the pin body 114 is slightly inserted into the receiving cavity 108 in a manner that its flat section 132 faces the first engaging portion 110 of the receiving cavity 108, so that the pin body 114 can be retained in the receiving cavity 108 by the retaining cantilever 134. At this time, the pin body 114 is in the initial adjustment position, and then the door component can be closed, and the buffer pin 104 can be pushed, so that the buffer pin 104 is in the reference position where its buffer head 112 just abuts against the door component. Finally, the door component is opened, and the buffer pin 104 is rotated to rotate the pin body 114 from the initial adjustment position to the locking position. The first engaging portion 110 of the accommodating cavity 108 engages with the second engaging portion 116 of the pin body 114 to retain the pin body 114 in the accommodating cavity 108. At the same time, the buffer pin 104 moves along the longitudinal direction D L The buffer pin 104 moves away from the accommodating cavity 108 by the required buffer distance, that is, the buffer pin 104 is lifted relative to the vehicle body by the required buffer distance, thereby obtaining the desired buffer effect.

[0067] The application of the buffer device according to the present invention is described above by taking the use of the buffer device in a vehicle as an example. It can be understood that the buffer device according to the present invention can be applied to various other scenarios where buffering is required.

[0068] It should be understood that Figures 1 to 7B The illustrated embodiments merely illustrate the shapes, sizes and arrangements of the various optional components of the buffer device according to the present invention, but they are merely illustrative and not restrictive, and other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention.

[0069] The technical content and technical features of the present invention have been disclosed above. However, it is understandable that, under the creative ideas of the present invention, those skilled in the art can make various changes and improvements to the above disclosed concepts, but they all belong to the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A buffer device, characterized in that: The buffer device comprises: A base, the base comprising a receiving cavity along a longitudinal direction, wherein an inner peripheral surface of the receiving cavity is provided with a first engaging portion; a buffer pin having a pin body adapted to be inserted into the accommodating cavity along the longitudinal direction, wherein an outer peripheral surface of the pin body is provided with a second engaging portion matching the first engaging portion; and a locking bushing, the locking bushing being at least partially disposed in the accommodating cavity along the longitudinal direction and being fixed to the base; wherein the pin body is capable of rotating within the accommodating cavity relative to the accommodating cavity between an initial adjustment position and a locked position; in the initial adjustment position, the first engaging portion and the second engaging portion are not engaged to allow the pin body to move along the longitudinal direction; when the pin body rotates from the initial adjustment position toward the locked position, the first engaging portion and the second engaging portion engage with each other and drive the pin body to move away from the accommodating cavity along the longitudinal direction; in the locked position, the pin body is locked by the locking bushing to prevent the pin body from rotating relative to the accommodating cavity; In which, the locking bushing includes a first locking portion for locking the pin body, and the locking bushing can be positioned in at least two circumferential positions relative to the accommodating cavity, so that the first locking portion can be positioned in at least two circumferential positions relative to the accommodating cavity to allow the pin body to be locked in at least two locking positions.

2. The buffer device according to claim 1, characterized in that When the pin body rotates from the initial adjustment position to the locking position, the distance the pin body moves along the longitudinal direction is positively correlated with the rotation angle of the pin body.

3. The buffer device according to claim 1, characterized in that The first engaging portion and the second engaging portion are both in the form of threads. The first engaging portion extends along a partial circumference of the inner circumferential surface of the accommodating cavity, and the second engaging portion extends along a partial circumference of the outer circumferential surface of the pin body.

4. The buffer device according to any one of claims 1 to 3, characterized in that: The locking bushing is provided with a positioning protrusion protruding outward in a transverse direction, At least two positioning grooves matching the positioning protrusions are provided on the circumferential wall of the accommodating cavity at intervals along the circumferential direction; The positioning protrusion is adapted to engage with the positioning groove to position the locking bushing relative to the accommodating cavity in at least two circumferential positions.

5. The buffer device according to claim 4, characterized in that: The locking bushing is provided with an elastic positioning cantilever extending along the longitudinal direction, and the positioning cantilever is provided with the positioning protrusion; The at least two positioning grooves of the accommodating cavity penetrate the circumferential wall of the accommodating cavity; The positioning protrusion is adapted to engage with the positioning groove to prevent the locking bushing from rotating relative to the accommodating cavity and moving along the longitudinal direction.

6. The buffer device according to claim 4, characterized in that The positioning protrusion of the locking bushing is provided on the outer peripheral surface of the locking bushing; The at least two positioning grooves of the accommodating cavity are provided on the inner circumferential surface of the accommodating cavity and extend from one end of the accommodating cavity along the longitudinal direction; The positioning protrusion is adapted to engage with the positioning groove to prevent the locking bushing from rotating relative to the accommodating cavity.

7. The buffer device according to claim 6, characterized in that The buffer device further includes a fixing bushing which is elastically sleeved on the outside of the locking bushing and fixes the locking bushing to the accommodating cavity.

8. The buffer device according to claim 7, characterized in that The fixing bushing is provided with barbs protruding outward in a transverse direction for fixing the locking bushing to the accommodating cavity.

9. The buffer device according to any one of claims 1 to 3, characterized in that: The buffer pin includes an elastic locking cantilever extending along the longitudinal direction, the locking cantilever is connected to the pin body, and the locking cantilever is provided with a second locking portion matching the first locking portion of the locking bushing. The first locking portion of the locking bushing is adapted to engage with the second locking portion on the locking cantilever arm to lock the pin body in the locked position.

10. The buffer device according to claim 9, characterized in that: The first locking portion is in the form of a slot, which is provided on a circumferential wall of the locking bushing and extends along the longitudinal direction; The second locking portion is in the form of a protrusion.

11. The buffer device according to claim 9, characterized in that The locking cantilever of the buffer pin is aligned with the second engaging portion in the longitudinal direction.

12. The buffer device according to claim 3, characterized in that The buffer pin includes an elastic retaining cantilever extending along the longitudinal direction, the retaining cantilever is connected to the pin body, and the retaining cantilever is provided with a retaining tooth portion matching the first engaging portion of the accommodating cavity; When the pin body is in the initial adjustment position, the retaining tooth portion of the retaining cantilever is adapted to engage with the first engaging portion of the accommodating cavity to retain the pin body in the accommodating cavity.

13. The buffer device according to claim 12, characterized in that: The accommodating cavity has two first engaging portions arranged on opposite sides in a transverse direction, The pin body has two second engaging portions arranged on opposite sides in the transverse direction, respectively, wherein the retaining cantilever is located between the two second engaging portions in the circumferential direction.

14. The buffer device according to any one of claims 1 to 3, characterized in that The buffer pin further comprises a buffer head for providing buffering, wherein the buffer head is connected to the pin body.

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