CN220226568U - Spring device of vehicle back door - Google Patents

Abstract

The utility model provides a vehicle back door's device that pops up, includes connecting portion, buffer portion and guiding portion, connecting portion are used for being connected with the back door of vehicle, buffer portion be used for with the back bumper contact of vehicle, buffer portion with connecting portion joint, just buffer portion with the connecting portion cooperation forms an upper end open-ended accommodation space, guiding portion install in the accommodation space, buffer portion can follow axial compression or extend, buffer portion is in when first state, buffer portion is along axial extension, back door pops up, and with have first clearance between the back bumper, buffer portion is in when second state, buffer portion is along axial compression, back door is closed, and with have the second clearance between the back bumper, simple structure, convenient quick assembly disassembly is convenient for change buffer portion and guiding portion, has good suitability.

Description

Spring device of vehicle back door

Technical Field

The utility model relates to the technical field of vehicle back doors, in particular to a bouncing device of a vehicle back door.

Background

Along with the diversified development of vehicle design, a lot of current vehicles have cancelled the hand groove of staff operation on back of the body door and back guarantor, make the line at vehicle rear portion smooth, have promoted aesthetic property, and this kind of motorcycle type needs back of the body door can automatic spring certain height when opening to in the gap that the back of the body door was sprung is stretched into to the staff, thereby lifts the back of the body door. For realizing the automatic bounce of back door, can set up an elastic mechanism between back door and back guarantor generally, elastic mechanism reaches the purpose that the back door was automatic to bounce through the elastic deformation of spring, because the back door of motorcycle type has the difference, if the back door is automatic to bounce highly less, the manual operable space of people is not enough, can influence the normal use of back door, influences people's use experience, and current elastic mechanism suitability is relatively poor, can't be applicable to different motorcycle types.

Disclosure of Invention

Therefore, the utility model aims to provide the bouncing device of the back door of the vehicle, which is convenient to assemble and disassemble, convenient to adjust and improved in applicability.

The utility model provides a bouncing device of a vehicle back door, which comprises a connecting part, a buffer part and a guide part, wherein the connecting part is used for being connected with the back door of the vehicle, the buffer part is used for being contacted with a rear bumper of the vehicle, the buffer part is clamped with the connecting part, the buffer part and the connecting part are matched to form a containing space with an open upper end, the guide part is arranged in the containing space, the buffer part can be compressed or stretched along the axial direction, when the buffer part is in a first state, the buffer part stretches along the axial direction, the back door bounces and has a first gap with the rear bumper, and when the buffer part is in a second state, the buffer part is compressed along the axial direction, and the back door is closed and has a second gap with the rear bumper.

In an embodiment, the connecting portion includes a supporting member and an adjusting member, the supporting member includes a base body and a sleeve, the adjusting member includes a socket hole matched with the base body, the base body is installed in the socket hole, and the sleeve is used for being connected with the buffer portion.

In an embodiment, a first thread is arranged on the radially outermost surface of the support member, a second thread is arranged on the wall of the sleeve joint hole, and the first thread and the second thread are matched to realize connection between the base body and the adjusting member.

In an embodiment, the guide part comprises a first limiting part and a main body, the radial dimension of the first limiting part is larger than that of the main body, a limiting rib is arranged on the radially outermost surface of the main body in a protruding mode, a guide hole and a limiting hole are formed in the main body, the guide hole is communicated with the limiting hole, the guide hole and the limiting hole axially penetrate through the main body, the main body is arranged in the guide hole, and the limiting rib is arranged in the limiting hole.

In an embodiment, a third thread is arranged on the radially outermost surface of the adjusting piece, a mounting hole matched with the adjusting piece is formed in the inner plate of the back door, and a fourth thread matched with the third thread is arranged on the hole wall of the mounting hole.

In an embodiment, the buffer portion includes a first elastic member and a second elastic member, the first elastic member includes a receiving cavity, the sleeve is installed in the receiving cavity, the sleeve includes a matching cavity, the second elastic member is located in the receiving cavity and the matching cavity, the second elastic member is sleeved on the main body, and the guide hole, the limiting hole, the receiving cavity and the matching cavity are matched to form the receiving space.

In an embodiment, the first elastic element comprises an abutting element and a deformation element, the abutting element is used for being in contact with the rear bumper, the deformation element can be compressed or stretched along the axial direction, a clamping block is convexly arranged at the upper end of the deformation element, a clamping groove is formed in the radially outermost surface of the sleeve, and the clamping block is clamped in the clamping groove.

In an embodiment, the buffer portion further includes a positioning plate, the positioning plate is located in the accommodating cavity, a first positioning groove is formed in one end, close to the second elastic element, of the positioning plate, and the lower portion of the second elastic element is located in the first positioning groove.

In an embodiment, the guide portion includes second locating part and spacing groove, the second locating part is located the main part is kept away from the one end of first locating part, and with the main part is connected, the spacing groove set up in the lower extreme of main part, the radial dimension of second locating part is greater than the radial dimension of main part, the locating plate includes the locating hole, the locating hole runs through along the axial the locating plate, the spacing groove with the locating hole joint.

In an embodiment, the cavity bottom of the accommodating cavity is convexly provided with a positioning column, the lower end of the second limiting part is provided with a second positioning groove matched with the positioning column, and the positioning column is arranged in the second positioning groove.

The utility model has the beneficial effects that:

the connecting part is clamped with the buffer part by the arrangement of the connecting part and the buffer part, so that the buffer part and the guide part can be conveniently replaced according to the spring height requirement of the back door, and the clamping structure is simple and the dismounting is convenient;

the guide part is arranged in the accommodating space formed by the buffer part and the connecting part, and through the cooperation of the guide part and the buffer part, the buffer part can be ensured to generate elastic deformation along the axial direction, the bouncing stability of the back door is ensured, the shaking is reduced, the switching quality of the back door is improved, and the back door has good applicability.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of the present utility model in a first state;

FIG. 2 is a schematic diagram showing the overall structure of an embodiment of the present utility model in a second state;

FIG. 3 is a cross-sectional view of an embodiment of the present utility model in a first state on a back door;

FIG. 4 is a cross-sectional view of an embodiment of the present utility model in a second state on a back door;

FIG. 5 is an exploded view of the overall structure of an embodiment of the present utility model;

FIG. 6 is an exploded cross-sectional view of the overall structure of an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of the overall structure of an embodiment of the present utility model in a first state;

fig. 8 is a cross-sectional view of the overall structure of an embodiment of the present utility model in a second state.

In the figure:

10-connecting part; 11-a support; 110-step surface; 111-substrate; 112-a sleeve; 1121-a mating cavity; 1122-a card slot; 113-a guide hole; 114-limiting holes; 12-an adjusting member; 121-a socket hole;

20-a buffer part; 21-a first elastic member; 211-an abutment; 212-deformation member; 2121-snap blocks; 213-accommodation chamber; 2131-grooves; 214-positioning columns; 22-a second elastic member; 23-positioning plates; 231-a first positioning groove;

30-a guide; 31-a first limiting piece; 32-a body; 321-limiting ribs; 33-a second limiting piece; 34-a limit groove; 35-a second positioning groove;

40-back door; 41-outer plates; 42-an inner plate; 421-mounting holes; 50-rear bumpers; h1-first gap; h2-second gap.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.

The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.

Referring to fig. 1 to 4, a vehicle back door bouncing device according to the present utility model includes:

the connecting portion 10, the buffer portion 20 and the guide portion 30, the connecting portion 10 is used for being connected with the back door 40 of the vehicle, the buffer portion 20 is used for being in contact with the rear bumper 50 of the vehicle, the connecting portion 10 and the buffer portion 20 are matched to form an accommodating space with an open upper end, the guide portion 30 is partially arranged in the accommodating space, the upper end of the guide portion 30 is exposed out of the accommodating space, the buffer portion 20 can generate elastic deformation along the axial direction, the buffer portion 20 can be compressed or stretched along the axial direction, when the buffer portion 20 stretches along the axial direction, the height dimension of the buffer portion 20 and the connecting portion 10 along the axial direction is increased, at the moment, the buffer portion 20 is in a first state, when the buffer portion 20 compresses along the axial direction, the height dimension of the buffer portion 20 and the connecting portion 10 along the axial direction is reduced, at the moment, the buffer portion 20 is in a second state.

Referring to fig. 1 and fig. 3, when the buffer portion 20 is in the first state, the buffer portion 20 extends in the axial direction, the back door 40 is sprung to a certain height, and a first gap H1 is formed between the back door 40 and the rear bumper 50, so that a user can extend his or her hand into the first gap H1 to lift the back door 40, and referring to fig. 2 and fig. 4, when the buffer portion 20 is in the second state, the back door 40 is closed, and a second gap H2 is formed between the back door 40 and the rear bumper 50, and the second gap H2 can be set according to the overall gap surface difference design of the vehicle, and it can be understood that the first gap H1 is larger than the second gap H2.

Referring to fig. 3 and 4, the back door 40 of the vehicle includes an outer plate 41 and an inner plate 42, the outer plate 41 is connected with the inner plate 42, and the connection portion 10 is used for being connected with the inner plate 42, and it is understood that the structure of the back door 40 is a conventional arrangement in the art, and will not be described herein.

Referring to fig. 1 and 5, the connecting portion 10 includes a supporting member 11 and an adjusting member 12, the supporting member 11 is used for being connected with the buffer portion 20, the adjusting member 12 is used for being connected with the back door 40, and by adjusting the position of the adjusting member 12 relative to the back door 40, the elastic travel of the bouncing device can be adjusted, and then the bouncing height of the back door 40 when being opened, that is, the value of the first gap H1 is adjusted, so as to be suitable for different vehicle types and the back door 40 thereof.

In one example of the present embodiment, the supporting member 11 is made of plastic material, and the weight of the entire pop-up device can be reduced while supporting.

In an example of this embodiment, the adjusting member 12 is made of TPV (Thermoplastic Vulcanizate, thermoplastic vulcanized rubber) or EPDM (Ethylene-Propylene-Diene Monomer) and has good strength and elasticity, so that the friction coefficient between the adjusting member 12 and the back door 40 is improved, the connection between the connecting portion 10 and the back door 40 is ensured to be stable and firm, and a certain sealing effect is achieved.

In an example of this embodiment, the supporting member 11 is fixedly connected with the adjusting member 12, for example, the supporting member 11 may be separately formed and placed in a processing mold, then the processing material of the adjusting member 12 is placed in the mold, the supporting member 11 and the adjusting member 12 are integrally connected through a thermoplastic process, and the stability and the firmness of the connecting portion 10 can be ensured and the connecting quality can be improved through the integral formation of the supporting member 11 and the adjusting member 12.

In the thermoplastic connection mode, the contact area between the supporting member 11 and the adjusting member 12 can be increased by the arrangement of the threads, so that the connection firmness is improved.

In one example of the present embodiment, as shown in fig. 5, the supporting member 11 includes a base 111 and a sleeve 112, the base 111 is used for being connected with the adjusting member 12, the sleeve 112 is used for being connected with the buffer portion 20, the adjusting member 12 includes a socket hole 121 for receiving the base 111, and the base 111 is installed in the socket hole 121, so that the connection between the base 111 and the adjusting member 12 can be achieved.

The base body 111 is provided with first threads along the radial outermost surface, the hole wall of the sleeve joint hole 121 is provided with second threads, the first threads are matched with the second threads, the connection between the base body 111 and the adjusting piece 12 is achieved in a threaded connection mode, the structure is simple, the connection mode is simple, and the installation difficulty is small. Illustratively, the base 111 is coaxially coupled to the sleeve 112.

Illustratively, the base 111 is integrally formed with the sleeve 112.

Illustratively, the radial dimension of the base 111 is smaller than the radial dimension of the sleeve 112, so that the supporting member 11 forms a step surface 110 at the connection between the base 111 and the sleeve 112, and when the adjusting member 12 is connected to the base 111, the step surface 110 can support and position the adjusting member 12, thereby improving the installation efficiency.

In an example of this embodiment, referring to fig. 3 to 5, a third thread is provided on the radially outermost surface of the adjusting member 12, a mounting hole 421 matching with the adjusting member 12 is provided on the inner plate 42 of the back door 40, a fourth thread is provided on the hole wall of the mounting hole 421, the third thread is matched with the fourth thread, and the connection between the adjusting member 12 and the inner plate 42 is achieved by screwing, so that the engagement portion between the third thread and the fourth thread can be adjusted according to the size of the first gap H1 required to be sprung up by the back door 40 and the gap surface difference design of the vehicle, and further the position of the connecting portion 10 relative to the inner plate 42 is adjusted.

As shown in fig. 5, the supporting member 11 includes a guiding hole 113, the guiding hole 113 axially penetrates through the base 111 and the sleeve 112, the guiding portion 30 is accommodated in the guiding hole 113, and referring to fig. 2 and 5, the guiding portion 30 includes a first limiting member 31 and a main body 32, the radial dimension of the first limiting member 31 is larger than the radial dimension of the guiding hole 113, the main body 32 is matched with the guiding hole 113 and is installed in the guiding hole 113, a limiting rib 321 is protruding from the radially outermost surface of the main body 32, the base 111 includes a limiting hole 114, the limiting hole 114 is communicated with the guiding hole 113, and axially penetrates through the base 111 and the sleeve 112, the limiting rib 321 is accommodated in the limiting hole 114, and the stroke of the whole bouncing device can be adjusted by adjusting the axial length of the main body 32, so as to be suitable for different backdoors 40.

Through setting up of spacing muscle 321 and spacing hole 114, when making main part 32 install in guiding hole 113, can not rotate around the axial in guiding hole 113, when rotating connecting portion 10 around the axial, install the device of will bouncing in mounting hole 421, or when adjusting connecting portion 10 in the position of mounting hole 421, can hold first elastic component 21 and rotate, make torsion pass through spacing hole 114 and spacing muscle 321 and transmit to guiding portion 30, make guiding portion 30 and connecting portion 10 synchronous rotation, need not to realize the installation with the help of the instrument, the degree of difficulty of operation has been reduced.

Illustratively, the first retainer 31 is coaxially coupled to the body 32.

Illustratively, the first retainer 31 is integrally formed with the body 32.

As shown in fig. 5, the buffer portion 20 includes a first elastic member 21 and a second elastic member 22, the first elastic member 21 is connected with the supporting member 11, the first elastic member 21 includes a receiving cavity 213, the receiving cavity 213 is formed at an upper end of the first elastic member 21, the sleeve 112 is installed in the receiving cavity 213, the sleeve 112 includes a matching cavity 1121 in combination with fig. 6, the matching cavity 1121 is formed at a lower end of the sleeve 112, the matching cavity 1121 is matched with the receiving cavity 213, for receiving the second elastic member 22, the receiving space is formed by matching the guiding hole 113, the limiting hole 114, the matching cavity 1121 and the receiving cavity 213, and the second elastic member 22 is sleeved on the main body 32.

The first elastic member 21 includes an abutting member 211 and a deformation member 212, the abutting member 211 is configured to contact the rear bumper 50, the deformation member 212 is configured to be connected to the support member 11, the deformation member 212 is configured to be axially expandable or compressible, the accommodating chamber 213 axially extends through the deformation member 212 and an upper end of the abutting member 211, when the deformation member 212 is axially expanded, a height dimension of the first elastic member 21 in an axial direction increases, the buffer portion 20 is in a first state, and when the deformation member 212 is axially compressed, the height dimension of the first elastic member 21 in the axial direction decreases, and the buffer portion 20 is in a second state.

Illustratively, the abutment 211 and the deformation 212 are coaxially connected.

Illustratively, the abutment 211 and the deformation 212 are integrally formed.

Illustratively, the deforming member 212 is a bellows, and by adjusting the number of bellows, the stroke of the entire pop-up device can be adjusted, so as to be suitable for different back doors 40.

Illustratively, the second elastic member 22 is a cylindrical spring, and the size of the spring may be selected according to practical requirements.

For example, referring to fig. 5 to 7, the first elastic member 21 is connected to the supporting member 11 as follows:

the clamping groove 1122 is formed in the radially outermost surface of the sleeve 112, the clamping block 2121 is convexly arranged at the upper end of the deformation member 212, when the sleeve 112 is arranged in the accommodating cavity 213, the clamping block 2121 is clamped in the clamping groove 1122, so that the first elastic member 21 and the supporting member 11 can be rapidly positioned and connected, and because the second elastic member 22 is positioned inside the first elastic member 21, external rainwater or impurities and the like cannot enter the first elastic member 21 and contact the second elastic member 22, the second elastic member 22 is prevented from being corroded or blocked by the guiding part 30, a good sealing effect is achieved, the sleeve is connected in a clamping manner, the dismounting is convenient, the first elastic member 21 and the second elastic member 22 with different specifications are convenient to replace, and the applicability is improved.

Referring to fig. 5, 6 and 7, the buffer portion 20 further includes a positioning plate 23, where the positioning plate 23 is disposed in the accommodating cavity 213 and is located between the cavity bottom of the accommodating cavity 213 and the second elastic member 22, and one end of the positioning plate 23 near the second elastic member 22 is provided with a first positioning slot 231, where the first positioning slot 231 is matched with the second elastic member 22, and the lower portion of the second elastic member 22 is located in the first positioning slot 231, and by matching the first positioning slot 231 with the main body 32 of the guide portion 30, the positioning and guiding effects on the second elastic member 22 can be achieved, so that the second elastic member 22 can be stably and efficiently stretched or compressed along the axial direction when the back door 40 is opened or closed, and further the opening or closing quality of the back door 40 is improved.

Illustratively, the positioning plate 23 is made of metal.

Referring to fig. 6 and 7, a groove 2131 matched with the positioning plate 23 is formed at the bottom of the accommodating cavity 213, the groove 2131 is communicated with the accommodating cavity 213, and when the positioning plate 23 is installed in the accommodating cavity 213, the positioning plate 23 is clamped in the groove 2131, so that quick positioning of the positioning plate 23 can be realized.

Referring to fig. 5, 6 and 7, the guide portion 30 further includes a second limiting member 33 and a limiting groove 34, the second limiting member 33 is located at one end of the main body 32 far away from the first limiting member 31 and is connected with the main body 32, the limiting groove 34 is formed at the lower end of the main body 32, the groove bottom of the limiting groove 34 is coplanar with the upper end surface of the second limiting member 33, the radial dimension of the second limiting member 33 is larger than the radial dimension of the main body 32, the positioning plate 23 further includes a positioning hole 232, the positioning hole 232 axially penetrates through the positioning plate 23, the groove depth dimension of the limiting groove 34 is matched with the hole depth dimension of the positioning hole 232, when the guide portion 30 is connected with the positioning plate 23, the positioning plate 23 is clamped in the limiting groove 34 through the positioning hole 232, or the limiting groove 34 is clamped in the positioning hole 232, so arranged that the lower end of the guide portion 30 is fixedly connected with the buffer portion 20, and the guide portion 30 can be prevented from falling out of the positioning hole 232 by the second limiting member 33.

Illustratively, the second stop 33 is coaxially coupled to the body 32.

Illustratively, the second stop 33 is integrally formed with the body 32.

For example, the second limiting member 33 may be pressed into the positioning hole 232 by riveting until the limiting groove 34 is clamped with the positioning hole 232.

In an example of this embodiment, as shown in fig. 6, the bottom of the accommodating cavity 213 is convexly provided with a positioning post 214, the lower end of the second limiting member 33 is provided with a second positioning groove 35 matched with the positioning post 214, when the guiding part 30 is located in the accommodating cavity 213, the positioning post 214 is clamped in the second positioning groove 322, so that quick positioning and installation of the guiding part 30 can be realized, and the guiding part 30 can be installed in the accommodating cavity 213 at one time, so that the operation is convenient and quick.

Illustratively, the second positioning slot 35 extends axially through the second stop 33 and through the lower end of the main body 32.

The working principle of the utility model is as follows:

when the back door 40 is closed, the inner plate 42 applies an axially downward force to the connecting portion 10, so that the first elastic member 21 and the second elastic member 22 are axially compressed, and at this time, the first limiting member 31 is not in contact with the connecting portion 10;

when the back door 40 is opened, at this time, the force applied by the inner plate 42 to the connecting portion 10 disappears, and the first elastic member 21 and the second elastic member 22 extend in the axial direction, so as to drive the connecting portion 10 and the inner plate 42 connected thereto to move upward in the axial direction until the upper end of the connecting portion 10 contacts with the lower end of the first limiting member 31, and the back door 40 springs up to the highest position.

The utility model can change the elastic travel of the bouncing device and the bouncing height of the back door 40 by the following means:

(1) Changing the axial length of the body 32 of the guide 30; since the guide part 30 is arranged in the accommodating cavity 213 in a clamping manner, the assembly and disassembly are convenient, and the replacement is convenient;

(2) Changing the axial deformation amount of the first elastic member 21 and the second elastic member 22; because the first elastic piece 21 is connected with the connecting part 10 in a clamping way, the first elastic piece 21 is convenient to detach, and the replacement is time-saving and labor-saving.

In summary, by providing the connecting portion 10 and the buffer portion 20, the connecting portion 10 is clamped with the buffer portion 20, so that the buffer portion 20 and the guide portion 30 can be replaced according to the spring height requirement of the back door 40, and the clamping structure is simple and the dismounting is convenient;

the guide part 30 is arranged in the accommodating space formed by the buffer part 20 and the connecting part 10, and through the cooperation of the guide part 30 and the buffer part 20, the buffer part 20 can be ensured to generate elastic deformation along the axial direction, the rebound stability of the back door 40 is ensured, the shake is reduced, the switching quality of the back door 40 is improved, and the back door has good applicability.

In the present utility model, the upper and lower ends are the upper ends of the pop-up device, which are located at the end close to the back door 40, and the lower ends of the pop-up device, which are located at the end close to the rear bumper 50, in terms of the orientation when the pop-up device is mounted to the back door 40.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims (10)

1. A vehicle back door bouncing device, characterized in that: including connecting portion (10), buffer portion (20) and direction portion (30), connecting portion (10) are used for being connected with back door (40) of vehicle, buffer portion (20) are used for with rear bumper (50) of vehicle contact, buffer portion (20) with connecting portion (10) joint, just buffer portion (20) with connecting portion (10) cooperation forms an upper end open-ended accommodation space, direction portion (30) install in the accommodation space, buffer portion (20) can compress or extend along the axial, when buffer portion (20) are in the first state, buffer portion (20) extend along the axial, back door (40) spring up, and with have first clearance (H1) between rear bumper (50), when buffer portion (20) are in the second state, buffer portion (20) compress along the axial, back door (40) close, and have second clearance (H2) with between rear bumper (50).

2. The vehicle tailgate pop-up device according to claim 1, wherein: the connecting part (10) comprises a supporting part (11) and an adjusting part (12), the supporting part (11) comprises a base body (111) and a sleeve (112), the adjusting part (12) comprises a sleeve joint hole (121) matched with the base body (111), the base body (111) is arranged in the sleeve joint hole (121), and the sleeve (112) is used for being connected with the buffer part (20).

3. The bouncing device of the back door of a vehicle according to claim 2, characterized in that: the support piece (11) is provided with first threads along the radial outermost surface, the hole wall of the sleeve joint hole (121) is provided with second threads, and the first threads and the second threads are matched to realize connection of the base body (111) and the adjusting piece (12).

4. The bouncing device of the back door of a vehicle according to claim 2, characterized in that: the guide part (30) comprises a first limiting part (31) and a main body (32), the radial size of the first limiting part (31) is larger than that of the main body (32), limiting ribs (321) are arranged on the outer surface of the main body (32) along the radial direction, guide holes (113) and limiting holes (114) are formed in the base body (111), the guide holes (113) are communicated with the limiting holes (114), the guide holes (113) and the limiting holes (114) penetrate through the base body (111) along the axial direction, the main body (32) is arranged in the guide holes (113), and the limiting ribs (321) are arranged in the limiting holes (114).

5. The bouncing device of the back door of a vehicle according to claim 2, characterized in that: the adjusting piece (12) is provided with third threads along the radial outermost surface, an inner plate (42) of the back door (40) is provided with a mounting hole (421) matched with the adjusting piece (12), and the hole wall of the mounting hole (421) is provided with fourth threads matched with the third threads.

6. The vehicle tailgate pop-up device according to claim 4, wherein: the buffer part (20) comprises a first elastic piece (21) and a second elastic piece (22), the first elastic piece (21) comprises a containing cavity (213), the sleeve (112) is arranged in the containing cavity (213), the sleeve (112) comprises a matching cavity (1121), the second elastic piece (22) is arranged in the containing cavity (213) and the matching cavity (1121), the second elastic piece (22) is sleeved on the main body (32), and the guide hole (113), the limiting hole (114), the containing cavity (213) and the matching cavity (1121) are matched to form the containing space.

7. The vehicle tailgate pop-up device according to claim 6, wherein: the first elastic piece (21) comprises an abutting piece (211) and a deformation piece (212), the abutting piece (211) is used for being in contact with the rear bumper (50), the deformation piece (212) can be compressed or stretched along the axial direction, a clamping block (2121) is convexly arranged at the upper end of the deformation piece (212), a clamping groove (1122) is formed in the radially outermost surface of the sleeve (112), and the clamping block (2121) is clamped in the clamping groove (1122).

8. The vehicle tailgate pop-up device according to claim 6, wherein: the buffer part (20) further comprises a positioning plate (23), the positioning plate (23) is located in the accommodating cavity (213), a first positioning groove (231) is formed in one end, close to the second elastic piece (22), of the positioning plate (23), and the lower portion of the second elastic piece (22) is located in the first positioning groove (231).

9. The vehicle tailgate pop-up device according to claim 8, wherein: the guide part (30) comprises a second limiting part (33) and a limiting groove (34), the second limiting part (33) is located at one end of the main body (32) away from the first limiting part (31) and is connected with the main body (32), the limiting groove (34) is formed in the lower end of the main body (32), the radial size of the second limiting part (33) is larger than that of the main body (32), the positioning plate (23) comprises a positioning hole (232), the positioning hole (232) axially penetrates through the positioning plate (23), and the limiting groove (34) is clamped with the positioning hole (232).

10. The vehicle tailgate pop-up device according to claim 9, wherein: the cavity bottom of the accommodating cavity (213) is convexly provided with a positioning column (214), the lower end of the second limiting part (33) is provided with a second positioning groove (35) matched with the positioning column (214), and the positioning column (214) is arranged in the second positioning groove (35).