CN114718402B

CN114718402B - Door connection hinge and vehicle

Info

Publication number: CN114718402B
Application number: CN202111256161.3A
Authority: CN
Inventors: 张伟大; 陈建就; 龙帅; 舒纲贵; 陈进
Original assignee: Guangdong Dongjian Automobile Intelligent System Co Ltd
Current assignee: Guangdong Dongjian Automobile Intelligent System Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-08-15
Anticipated expiration: 2041-10-27
Also published as: CN114718402A

Abstract

The invention discloses a door connection hinge and a vehicle, wherein the door connection hinge comprises: a first base for mounting on a vehicle body, a second base for mounting on a vehicle door, a rotating member, and a ball pin pair; the second base is connected with the first base through the ball pin pair, and the rotating piece is provided with a first rotating shaft rotatably installed on the first base and a second rotating shaft rotatably installed on the second base. The invention can be used for connecting the vehicle door and the vehicle body, so that the outward opening angle of the vehicle door is small, and the damage to pedestrians or the vehicle door on a road caused by opening the vehicle door is avoided, and the invention belongs to the technical field of automobile accessories.

Description

Door connection hinge and vehicle

Technical Field

The invention relates to the technical field of automobile accessories, in particular to a vehicle door connecting hinge and a vehicle.

Background

At present, in view of parking space and door opening safety, more and more automobile factories use scissor doors in China, and the doors can be opened in a narrow area, so that the damage to pedestrians on roads or the doors caused by the opening of common doors is avoided. The scissor door is mainly divided into the following modes according to the movement modes: 1. a straight open type; the door opening mode of straight up and down is higher in requirement on the car door and car body, and cannot be applied to some upgrading car types, and the appearance cannot be changed greatly. 2. Open outwards; firstly, opening outwards, and opening upwards after opening a certain angle; the motion trail is not smooth enough, and the experience is poor. In addition, the existing scissor door has complex structure and high manufacturing cost, only the opening mode of the high-end vehicle is considered, and no mature and mass-produced scissor door hinge exists in the current domestic vehicle factories.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the invention aims at: the invention provides a door connecting hinge and a vehicle, which can be used for connecting a door and a vehicle body, so that the outward opening angle of the door is small, the door can be smoothly and simultaneously opened outwards and upwards, and damage to pedestrians on a road or the door is avoided due to the opening of the door.

In order to achieve the above purpose, the invention adopts the following technical scheme:

a door attachment hinge comprising: a first base for mounting on a vehicle body, a second base for mounting on a vehicle door, a rotating member, and a ball pin pair; the second base is connected with the first base through the ball pin pair, and the rotating piece is provided with a first rotating shaft rotatably installed on the first base and a second rotating shaft rotatably installed on the second base.

Further, the ball pin pair comprises an installation seat fixedly connected with the first base, a rotating ball and a connecting seat connected with the rotating ball; the connecting seat is connected with the second base, the mounting seat is provided with a spherical groove and a notch communicated with the spherical groove, the rotating ball is rotatably mounted in the spherical groove, and the connecting seat penetrates through the notch to be connected with the rotating ball.

Further, the ball pin pair further comprises a limiting pin connected with the rotating ball; the mounting seat is also provided with a limit groove communicated with the spherical groove; the limiting pin is located in the limiting groove.

Further, the limit groove is a strip groove, and the limit pin slides along the extending direction of the strip groove.

Further, the mounting seat comprises a first positioning block and a second positioning block which is detachably arranged on the first positioning block; the first positioning block is provided with a first hemispherical groove and a first hemispherical groove body, the second positioning block is provided with a second hemispherical groove and a second hemispherical groove body, the inner wall of the first hemispherical groove and the inner wall of the second hemispherical groove are jointly enclosed to form the notch and the spherical groove, and the inner wall of the first hemispherical groove body and the inner wall of the second hemispherical groove body are jointly enclosed to form the limit groove.

Further, the connecting seat comprises a first connecting shaft connected with the rotating ball and a second connecting shaft connected with the first connecting shaft; the second connecting shaft is connected with the second base.

Further, the rotating piece is also provided with a rotating seat, and the rotating seat is provided with a first shaft hole; the first base is provided with a first positioning seat and a second positioning seat; the first positioning seat is provided with a second shaft hole, and the second positioning seat is provided with a third shaft hole; a first limiting ring and a second limiting ring are arranged on the first rotating shaft, and the first limiting ring and the second limiting ring are distributed at intervals along the axial direction of the first rotating shaft; the first rotating shaft sequentially passes through the second shaft hole, the first shaft hole and the third shaft hole; the rotating seat is clamped between the first positioning seat and the second positioning seat, the first positioning seat is clamped between the rotating seat and the first limiting ring, and the second positioning seat is clamped between the rotating seat and the second limiting ring.

Further, the rotating seat is also provided with a fourth shaft hole; the second base is provided with a third positioning seat and a fourth positioning seat, the third positioning seat is provided with a fifth shaft hole, and the fourth positioning seat is provided with a sixth shaft hole; a third limiting ring and a fourth limiting ring are arranged on the second rotating shaft, and the third limiting ring and the fourth limiting ring are distributed at intervals along the axial direction of the second rotating shaft; the second rotating shaft sequentially passes through the fifth shaft hole, the fourth shaft hole and the sixth shaft hole; the rotating seat is clamped between the third positioning seat and the fourth positioning seat, the third positioning seat is clamped between the rotating seat and the third limiting ring, and the fourth positioning seat is clamped between the rotating seat and the fourth limiting ring.

Further, a first limiting block is arranged on the rotating seat, a second limiting block is arranged on the first base, and the second limiting block is located on the rotating path of the first limiting block.

A vehicle includes a vehicle body, a door, and a door connection hinge as described above, the second base being mounted on the door by a bolt, and the first base being mounted on the vehicle body by a bolt.

Compared with the prior art, the invention has the beneficial effects that: the invention can be used for connecting the vehicle door and the vehicle body, the vehicle door connecting hinge can enable the vehicle door to be opened outwards at a small angle and smooth without blocking, and the vehicle door connecting hinge can enable the vehicle door to be opened outwards and upwards at the same time, so that the movement track is smooth. The side opening angle of the vehicle door is small, and damage to pedestrians or the vehicle door on a road caused by opening the vehicle door is avoided. The ball pin pair adopts a detachable structure, and can realize the purpose of independently replacing failure parts, so that the ball pin pair has better maintainability and reduces maintenance cost. The invention has the advantages of convenient installation, applicability to any vehicle type, simple structure, low cost and convenient popularization and use.

Drawings

FIG. 1 is a schematic structural view of a door attachment hinge;

FIG. 2 is an exploded view of the door attachment hinge;

FIG. 3 is an exploded view of the first base, ball pin pair;

FIG. 4 is a schematic structural view of the second base, the fourth positioning seat and the fifth positioning seat;

fig. 5 is a schematic structural view of the rotary member.

In the figure, 1, a first base; 2. a second base; 3. ball pin pairs; 4. a rotating member; 5. a first positioning seat; 6. a second positioning seat; 7. a third positioning seat; 8. a fourth positioning seat; 9. a first limiting block; 10. a second limiting block;

201. a connection hole; 301. a mounting base; 302. a rotating ball; 303. a connecting seat; 304. a spherical groove; 305. a notch; 306. a limit groove; 307. a limiting pin; 401. a first rotation shaft; 402. a second rotation shaft; 403. a rotating seat; 404. a first stop collar; 405. a second limiting ring; 406. a third limiting ring; 407. a fourth stop collar; 408. a first sleeve; 409. a second sleeve; 501. a second shaft hole; 601. a third shaft hole; 701. a fifth shaft hole; 801. a sixth shaft hole;

3011. a first positioning block; 3012. a second positioning block; 3013. a first hemispherical groove; 3014. a second hemispherical groove; 3015. a first half of the tank body; 3016. a second half-tank; 3017. a positioning surface; 3032. a first connecting shaft; 3033. a second connecting shaft; 3034. a fifth stop collar; 3035. a fastening ring; 3036. a third sleeve; 4031. a first shaft hole; 4032. and a fourth shaft hole.

Detailed Description

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" 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, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the description of the present invention, it is to be understood that the terms "first", "second", etc. are used in the description of various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.

For convenience of description, the up-down direction hereinafter referred to is identical to the up-down direction of fig. 1 itself unless otherwise stated.

As shown in fig. 1 to 5, the present embodiment provides a door connecting hinge including a first base 1 for mounting on a vehicle body, a second base 2 for mounting on a vehicle door, a rotating member 4, and a ball pin pair 3; the first base 1 is intended to be fixed to a vehicle body or body and the second base 2 is intended to be fixed to a vehicle door. The second base 2 is connected to the first base 1 through the ball pin pair 3, and the rotating member 4 has a first rotating shaft 401 rotatably mounted on the first base 1 and a second rotating shaft 402 rotatably mounted on the second base 2. The second base 2 is respectively connected with the first base 1 through the ball pin pair 3 and the rotating piece 4, so that the second base 2 drives the vehicle door to rotate by a certain angle along the design direction, the motion track of the vehicle door connected with the second base 2 is a space curve, and the space curve extends outwards and simultaneously extends upwards.

The first base 1 is connected with the second base 2 through the rotating piece 4, can drive the second base 2 upset when rotating piece 4 rotates about first base 1 from top to bottom for rotating piece 4 drives the axis rotation of second base 2 around first axis of rotation 401, and then make second base 2 drive the door round the automobile body upset, second base 2 is connected with first base 1 through ball pin pair 3, ball pin pair 3 rotates along self rotation center, make second base 2 possess definite motion trail, consequently the in-process that the door overturned can be along the fore-and-aft horizontal slip of the direction of motion of car under the drive of ball pin pair 3, avoid the door card to die. During the door tilting, the door rotates upward while moving outward (left or right).

When the second rotating shaft 402 rotates around the first rotating shaft 401 from the uppermost position to the lowermost position, the vehicle door is away from the first base 1 and the vehicle body, then approaches the vehicle body, and finally is attached to the vehicle body to achieve closing. When the vehicle door is opened, the second rotating shaft 402 rotates from the lowest position to the uppermost position around the first rotating shaft 401, the vehicle door is firstly far away from the first base 1 and the vehicle body, then approaches the vehicle body, and finally is opened with the vehicle body positioned above.

Specifically, in one embodiment, the axis of the first rotating shaft 401 and the axis of the second rotating shaft 402 form a predetermined included angle, the first base 1 is installed at the front end of the vehicle body, the second base 2 is installed at the front end of the vehicle door, the axis of the first rotating shaft 401 and the axis of the second rotating shaft 402 are not parallel, the distance between the axis of the first rotating shaft 401 and the axis of the second rotating shaft 402 gradually increases from front to back, when the vehicle door can rotate upwards while opening outwards around the vehicle body, the outward opening amplitude of the vehicle door is smaller than the upward movement amplitude along with the rotation of the vehicle door, and the outward opening angle of the vehicle door is smaller when the vehicle door is completely opened upwards.

Specifically, in one embodiment, the predetermined angle is 20 ° -45 °. Preferably, in this embodiment, the predetermined angle is 30 °, which ensures that the minimum angle of outward opening of the door is ensured, and simultaneously ensures smoothness of opening of the door, so as to avoid the upward opening of the door due to too small angle of outward opening of the door.

Specifically, in one embodiment, the ball pin pair 3 includes a mounting seat 301 fixedly connected to the first base 1, a rotating ball 302, and a connection seat 303 connected to the rotating ball 302; the connecting seat 303 is connected with the second base 2, the mounting seat 301 has a spherical groove 304 and a notch 305 communicating with the spherical groove 304, the rotating ball 302 is rotatably mounted in the spherical groove 304, and the connecting seat 303 is connected with the rotating ball 302 through the notch 305. The slot 305 is a circular hole, the diameter of the spherical slot 304 is slightly larger than the diameter of the rotating ball 302, and the diameter of the slot 305 is smaller than the diameter of the spherical slot 304. The rotating ball 302 rotates in the spherical groove 304, and when the second base 2 rotates along the axis of the first rotating shaft 401 under the driving of the second rotating shaft 402, the second base 2 drives the rotating ball 302 to rotate through the connecting seat 303.

Specifically, in one embodiment, the ball pin pair 3 further includes a stopper pin 307 connected to the turning ball 302; the mounting seat 301 also has a limit groove 306 communicated with the spherical groove 304; a stop pin 307 is located in the stop slot 306.

The limiting groove is a strip groove, the limiting pin 307 slides along the extending direction of the strip groove, the limiting pin 307 slides along the rotating direction in the limiting groove 306 during the opening or closing process of the vehicle door, and the matching of the limiting pin 307 and the limiting groove 306 limits the rotating path of the rotating ball, so that the vehicle door is opened along the preset path during the opening or closing process of the vehicle door.

Specifically, in one embodiment, the first base 1 has a first plane parallel to the rotation axis of the first rotation shaft 401; the mounting base 301 is in a triangular prism shape, the mounting base 301 is provided with a positioning surface 3017, and a notch 305 of the spherical groove 304 is formed on the positioning surface 3017. The locating surface 3017 is connected to the first plane and has an included angle of 30 ° -60 ° with the first plane. In this embodiment, the included angle between the positioning surface 3017 and the first plane is 45 °, and the positioning surface 3017 extends from bottom to top along the direction away from the first plane, so as to avoid the situation that the door moves to the roof due to the overlarge upward rotation range of the door, and influence the opening speed of the door.

Specifically, in one embodiment, the mounting base 301 includes a first positioning block 3011, and a second positioning block 3012 detachably mounted on the first positioning block 3011; the first positioning block 3011 has a first hemispherical groove 3013 and a first half groove 3015, and the second positioning block 3012 has a second hemispherical groove 3014 and a second half groove 3016, and the inner wall of the first hemispherical groove 3013 and the inner wall of the second hemispherical groove 3014 enclose together to form a notch 305 and a spherical groove 304. The inner wall of the first half groove 3015 and the inner wall of the second half groove 3016 are enclosed together to form a limit groove. The first positioning block 3011 is fixed on the first base 1 and is integrally formed with the first base 1, the second positioning block 3012 is detachable from the first positioning block 3011 through fasteners such as bolts, when the rotating ball 302 and the connecting seat 303 of the ball pin pair 3 are damaged, the first positioning block 3011 and the second positioning block 3012 can be separated, so that the rotating ball 302 is taken out, the rotating ball 302 is also detachably connected with the connecting seat 303, and therefore the ball pin pair 3 can be detached and replaced for damaged parts, so that the ball pin pair 3 has better maintainability, the maintenance cost of the ball pin pair 3 is reduced, and the maintenance cost of a vehicle door connecting hinge and a vehicle with the vehicle door connecting hinge is further reduced.

Specifically, in one embodiment, the stop pin 307 is integrally formed with the rotatable ball.

Specifically, in one embodiment, the stop pin 307 is provided with an external thread, and the rotating ball is provided with an internal thread hole, so that the stop pin 307 is in threaded connection with the rotating ball 302, and the stop pin 307 is more convenient to connect or detach with the rotating ball 302.

Specifically, in one embodiment, the connection socket 303 further includes a first connection shaft 3032 connected to the rotation ball 302; the axis of the stopper pin 307, one diameter of the turning ball 302, and the axis of the first connection shaft 3032 are all overlapped, and the diameter of the first connection shaft 3032 gradually increases along the axis of the first connection shaft 3032 in a direction away from the stopper pin 307. The axis of spacer pin 307 coincides with the axis of first connecting shaft 3032, along the axis of first connecting shaft 3032 and in the direction of deviating from spacer pin 307, the diameter of first connecting shaft 3032 increases gradually, improves the intensity of first connecting shaft 3032, avoids first connecting shaft 3032 and the junction diameter of rotating ball too big so that first connecting shaft 3032 is difficult to pass the notch or easily to touch the notch edge simultaneously to avoid causing the rotation of rotating ball 302 to appear blocking.

Specifically, in one embodiment, the limiting groove 306 is hemispherical, and the arc surface of the limiting groove 306 is tangent to the arc surface of the spherical groove 304. The diameter of the limiting groove 306 is larger than that of the spherical groove 304, so that the rotation range of the limiting pin 307 is larger, and the limiting pin 307 is prevented from touching the inner wall of the limiting groove 306.

Specifically, in one embodiment, the connection socket 303 further includes a second connection shaft 3033 connected to the first connection shaft 3032; the second connection shaft 3033 is connected to the second base 2. The axis of the second connecting shaft 3033 coincides with the axis of the first connecting shaft 3032, and the second connecting shaft 3033 is used for being connected with a vehicle door, so that the spherical center of the rotating ball 302 and the axis of the limiting pin 307, the axis of the first connecting shaft 3032 and the axis of the second connecting shaft 3033 are all positioned on the same straight line, and the connection strength of the limiting pin 307, the first connecting shaft 3032 and the second connecting shaft 3033 is ensured.

Specifically, in one embodiment, the first and second connection shafts 3032 and 3033 are integrally formed, so that the overall strength of the connection base 303 is improved.

Specifically, in one embodiment, the connection seat 303 further includes a fifth stopper ring 3034 defined between the first connection shaft 3032 and the second connection shaft 3033, a third sleeve 3036 sleeved on the second connection shaft 3033, and a fastening ring 3035. The second base 2 is provided with a connection hole 201 for being sleeved on the third shaft sleeve 3036, the second connection shaft 3033 is installed in the connection hole 201 of the second base 2 through the third shaft sleeve 3036 and penetrates through the connection hole 201, and the second connection shaft 3033 is prevented from being separated from the second base 2 by a fastener after penetrating through the connection hole 201 and then being connected with the second base 2. The fifth stopper 3034 is integrally formed with the first and second connection shafts 3032 and 3033.

Specifically, in one embodiment, the rotating member 4 further has a rotating seat 403, and the rotating seat 403 has a first shaft hole 4031; the first base 1 is provided with a first positioning seat 5 and a second positioning seat 6; the first positioning seat 5 and the second positioning seat 6 are respectively formed integrally with the first base 1, the first positioning seat 5 is provided with a second shaft hole 501, and the second positioning seat 6 is provided with a third shaft hole 601; a first limiting ring 404 and a second limiting ring 405 are arranged on the first rotating shaft 401, and the first limiting ring 404 and the second limiting ring 405 are distributed at intervals along the axial direction of the first rotating shaft 401; the first rotating shaft 401 sequentially passes through the second shaft hole 501, the first shaft hole 4031 and the third shaft hole 601; the rotating seat 403 is clamped between the first positioning seat 5 and the second positioning seat 6, the first positioning seat 5 is clamped between the rotating seat 403 and the first limiting ring 404, and the second positioning seat 6 is clamped between the rotating seat 403 and the second limiting ring 405. The first stopper ring 404 and the second stopper ring 405 prevent the first rotation shaft 401 from falling off.

Specifically, in one embodiment, the first shaft hole 4031 is provided with a first shaft sleeve 408, and the first rotation shaft 401 is provided in the first shaft hole 4031 via the first shaft sleeve 408. A second shaft sleeve 409 is installed in the second shaft hole 501, and the second rotation shaft 402 is installed in the second shaft hole 501 through the second shaft sleeve 409. So that the rotation of the first rotation shaft 401 and the second rotation shaft 402 is smoother.

Specifically, in one embodiment, the swivel base 403 further has a fourth shaft hole 4032; the second base 2 is provided with a third positioning seat 7 and a fourth positioning seat 8, the third positioning seat 7 is provided with a fifth shaft hole 701, and the fourth positioning seat 8 is provided with a sixth shaft hole 801; the second rotating shaft 402 is provided with a third limiting ring 406 and a fourth limiting ring 407, and the third limiting ring 406 and the fourth limiting ring 407 are distributed at intervals along the axial direction of the second rotating shaft 402; the second rotation shaft 402 passes through the fifth shaft hole 701, the fourth shaft hole 4032, and the sixth shaft hole 801 in this order; the rotating seat 403 is clamped between the third positioning seat 7 and the fourth positioning seat 8, the third positioning seat 7 is clamped between the rotating seat 403 and the third limiting ring 406, the fourth positioning seat 8 is clamped between the rotating seat 403 and the fourth limiting ring 407, and the third limiting ring 406 and the fourth limiting ring 407 prevent the second rotating shaft 402 from being separated.

Specifically, in one embodiment, the rotating seat 403 is provided with a first limiting block 9, the first base 1 is provided with a second limiting block 10, and the second limiting block 10 is located on the rotating path of the first limiting block 9. When the vehicle door is driven by the second base 2 to rotate upwards, the first limiting block 9 is abutted against the second limiting block 10, so that positioning is realized, and the vehicle door is prevented from being opened too much to collide with the vehicle body. The first stopper 9 is integrally formed with the rotation seat 403. The second limiting block 10 and the first base 1 are integrally formed.

A vehicle includes a vehicle body, a door, and a door connection hinge as above, a second base is mounted on the door by a bolt, and a first base is mounted on the vehicle body by a bolt.

The working principle of the invention is as follows: the first base is installed on the automobile body, and the second base is installed on the door, and in the process of opening the door, the second axis of rotation outwards removes when rotating the seat around first axis of rotation upwards, and the door rotates when moving along with the second axis of rotation to make the door outwards open and upwards remove simultaneously. In the process that the vehicle door is opened outwards and moves upwards, the second base turns over on a preset space curve around the rotating ball through the limiting pin, and the rotating ball is fixed on the first base through the mounting seat. The door is fully opened when the second rotating shaft is turned over around the first rotating shaft and is abutted against the upper end of the first base, and is fully closed when the second rotating shaft is turned over around the first rotating shaft and is abutted against the lower end of the first base.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. A door attachment hinge, characterized by: comprising the following steps: a first base for mounting on a vehicle body, a second base for mounting on a vehicle door, a rotating member, and a ball pin pair; the second base is connected with the first base through the ball pin pair, and the rotating piece is provided with a first rotating shaft rotatably arranged on the first base and a second rotating shaft rotatably arranged on the second base;

the ball pin pair comprises a mounting seat, a rotating ball and a connecting seat, wherein the mounting seat is fixedly connected with the first base; the connecting seat is connected with the second base, the mounting seat is provided with a spherical groove and a notch communicated with the spherical groove, the rotating ball is rotatably arranged in the spherical groove, and the connecting seat passes through the notch to be connected with the rotating ball;

the ball pin pair further comprises a limiting pin connected with the rotating ball; the mounting seat is also provided with a limit groove communicated with the spherical groove; the limiting pin is positioned in the limiting groove; the limiting groove is a strip-shaped groove, and the limiting pin slides along the extending direction of the strip-shaped groove.

2. A door attachment hinge as defined in claim 1, wherein: the mounting seat comprises a first positioning block and a second positioning block which is detachably arranged on the first positioning block; the first positioning block is provided with a first hemispherical groove and a first hemispherical groove body, the second positioning block is provided with a second hemispherical groove and a second hemispherical groove body, the inner wall of the first hemispherical groove and the inner wall of the second hemispherical groove are jointly enclosed to form the notch and the spherical groove, and the inner wall of the first hemispherical groove body and the inner wall of the second hemispherical groove body are jointly enclosed to form the limit groove.

3. A door attachment hinge as defined in claim 1, wherein: the connecting seat comprises a first connecting shaft connected with the rotating ball and a second connecting shaft connected with the first connecting shaft; the second connecting shaft is connected with the second base.

4. A door attachment hinge as defined in claim 1, wherein: the rotating piece is also provided with a rotating seat, and the rotating seat is provided with a first shaft hole; the first base is provided with a first positioning seat and a second positioning seat; the first positioning seat is provided with a second shaft hole, and the second positioning seat is provided with a third shaft hole; a first limiting ring and a second limiting ring are arranged on the first rotating shaft, and the first limiting ring and the second limiting ring are distributed at intervals along the axial direction of the first rotating shaft; the first rotating shaft sequentially passes through the second shaft hole, the first shaft hole and the third shaft hole; the rotating seat is clamped between the first positioning seat and the second positioning seat, the first positioning seat is clamped between the rotating seat and the first limiting ring, and the second positioning seat is clamped between the rotating seat and the second limiting ring.

5. A door attachment hinge as defined in claim 4, wherein: the rotating seat is also provided with a fourth shaft hole; the second base is provided with a third positioning seat and a fourth positioning seat, the third positioning seat is provided with a fifth shaft hole, and the fourth positioning seat is provided with a sixth shaft hole; a third limiting ring and a fourth limiting ring are arranged on the second rotating shaft, and the third limiting ring and the fourth limiting ring are distributed at intervals along the axial direction of the second rotating shaft; the second rotating shaft sequentially passes through the fifth shaft hole, the fourth shaft hole and the sixth shaft hole; the rotating seat is clamped between the third positioning seat and the fourth positioning seat, the third positioning seat is clamped between the rotating seat and the third limiting ring, and the fourth positioning seat is clamped between the rotating seat and the fourth limiting ring.

6. A door attachment hinge as defined in claim 4, wherein: the rotating seat is provided with a first limiting block, the first base is provided with a second limiting block, and the second limiting block is positioned on the rotating path of the first limiting block.

7. A vehicle, characterized in that: comprising a vehicle body, a door, and the door attachment hinge of any one of claims 1 to 6, the second base being mounted to the door by bolts, the first base being mounted to the vehicle body by bolts.