CN106585340B - Automobile sliding door and positioning device thereof - Google Patents

Abstract

The invention discloses a positioning device for a sliding door of an automobile. The sliding door is pulled to be slidably closed relative to the vehicle body, the first guide wheel slides along the top guide rail, and the second guide wheel slides along the bottom guide rail, so that the sliding door is relatively The vehicle body is positioned in the Y direction, the third guide wheel slides along the middle guide rail, so that the sliding door is positioned in the X direction relative to the vehicle body, the first support wheel slides along the middle guide rail, and the second support wheel slides along the bottom guide rail to make the sliding door The sliding door is positioned in the Z direction relative to the vehicle body. The invention discloses an automobile sliding door. Implementing the automobile sliding door and its positioning device of the present invention can reduce the production matching and debugging cycle and cost of the prototype vehicle, improve the positioning stability of the sliding door, avoid the quality stability problem caused by insufficient positioning stability, and improve the slippage. The positioning stability of the door and the matching pass rate with the body and the front door.

Description

An automobile sliding door and its positioning device

technical field

The invention relates to the field of automobile manufacturing, in particular to an automobile sliding door and a positioning device thereof.

Background technique

Sliding door is a type of car door. It mainly realizes the positioning function through the cooperation of pulley slides. For example, the lateral positioning of the sliding door and the body requires a limit device to provide a lateral pressing force. The positioning device in the longitudinal direction of the body has the effect of preventing the abnormal noise of the sliding door from shaking.

With the vigorous development of the modern automobile industry, in order to improve the competitiveness of the models, the requirements for the clearance and flushness of the automobiles are getting higher and higher. In the prior art, due to the unreasonable structural design of the automobile sliding door positioning device, the following technical problems mainly exist:

1. Since the sliding door is positioned by the hinge and the guide rail, the guide rail is installed on the floor of the body, and some limit devices are installed on the side wall of the body. The deviation value of the side wall of the body relative to the guide rail is finally reflected in the closing process of the sliding door. The deviation of the middle limit device in the longitudinal direction of the vehicle body will lead to the influence of the poor cooperation of the limit device of the door face difference, which is not conducive to the later debugging;

2. When the vehicle door is closed in the prior art, since the sliding door has deviation in the longitudinal direction of the vehicle body, the sliding door will also have deviation in the lateral direction of the vehicle body. For example: when the sliding door deviates by 1mm in the longitudinal direction of the body, the sliding door will have a deviation of 2.3mm in the lateral direction of the body, which will cause the sliding door to be difficult to close, and the gap around the easy-sliding door will not be controlled.

To sum up, because the structure, movement form, functional size, etc. of the sliding door of MPV models are quite different from those of ordinary doors, and the size of the sliding door is larger than that of the traditional door, in the process of automobile trial production and production. , How to improve the pass rate of the matching gap between the sliding door and the side wall and the front door has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an automobile sliding door and its positioning device, which can reduce the production matching and debugging cycle and cost of prototype vehicles, improve the positioning stability of the sliding door, and avoid the problems caused by insufficient positioning stability. Quality stability problem, improve the positioning stability of the sliding door and the matching pass rate with the body and front door.

In order to solve the above-mentioned technical problem, an embodiment of the present invention provides a positioning device for a sliding door of an automobile, comprising: a first hinge assembly that can be fitted with a top guide rail on the vehicle body, and the first hinge assembly has a A first guide wheel that controls the Y-direction positioning of the sliding door relative to the vehicle body; a second hinge assembly that can be adapted to fit with the bottom rail on the vehicle body, the second hinge assembly has a function to control the sliding door relative to the vehicle body The second guide wheel for Y-direction positioning of the body and the first support wheel for controlling the Z-direction positioning of the sliding door relative to the car body; the third hinge assembly that can be matched with the middle guide rail on the car body, the first The three-hinge assembly has a third guide wheel for controlling the X-direction positioning of the sliding door relative to the vehicle body and a second supporting wheel for controlling the Z-direction positioning of the sliding door relative to the vehicle body, wherein: the sliding door has On the opposite sides, the first hinge assembly and the second hinge assembly are respectively installed at the position close to the end corner of one of the sides, and the third hinge assembly is installed at the middle position close to the other side; The sliding door is slid and closed relative to the car body, the first guide wheel slides along the top guide rail, the second guide wheel slides along the bottom guide rail, so that the sliding door is positioned in the Y direction relative to the car body, and the third guide wheel slides along the middle guide rail , the sliding door is positioned in the X direction relative to the car body, the first support wheel slides along the middle guide rail, and the second support wheel slides along the bottom guide rail, so that the sliding door is positioned relative to the car body in the Z direction; the third hinge assembly includes : Fifth assembly, nut plate and tooling. The nut plate and the tooling are respectively provided with assembly holes that can match each other and fix them on the sliding door, and one end of the stud passes through the assembly hole of the tooling , After the assembly hole of the nut plate, use the stud bolts to fix the nut plate and the tooling on the sliding door after the position is determined. The assembly hole of the fifth assembly part passes through the other end of the stud bolt, and the first Five fittings are fixed on the sliding door; the first hinge assembly includes: a first fitting for fitting on the sliding door and a second fitting capable of adjusting the relative position of the first fitting, wherein: the first fitting The fittings and/or the second fittings are provided with waist-shaped bolt holes; the first guide wheels are mounted on the second fittings, and the first guide wheels press against the two side walls of the top rail of the vehicle body.

Wherein, it also includes: a latch assembly for controlling the Y-direction positioning of the sliding door relative to the vehicle body, and the latch assembly is installed in the middle of the side of the sliding door on which the second hinge assembly is installed.

Wherein, the lock catch assembly includes: a lock body arranged on the sliding door, and the lock body has a lock tongue that can be matched with the lock catch installed on the vehicle body.

Wherein, the second hinge assembly includes: a third assembly part for assembling on the sliding door and a fourth assembly part capable of adjusting the relative position of the third assembly part, wherein: the third assembly part and/or the fourth assembly part There is a waist-shaped bolt hole on it; the second guide wheel and the first support wheel are respectively installed on the fourth assembly, the second guide wheel is pressed against the two side walls of the bottom guide rail of the vehicle body, and the first support wheel is pressed against the two side walls of the bottom guide rail of the vehicle body. Press on the bottom wall of the bottom rail of the car body.

Wherein, the direction in which the sliding door is positioned relative to the vehicle body in the Y direction is the direction of the outward pressing force provided by the vehicle body to the sliding door perpendicular to the sliding door when the sliding door is closed relative to the vehicle body; The direction of Z direction positioning on the vehicle body is the direction of the sliding door's own gravity; the direction of the X direction positioning of the sliding door relative to the vehicle body is the direction perpendicular to the Y direction positioning direction and the Z direction positioning direction respectively.

In order to solve the above technical problems, the present invention also discloses an automobile sliding door with the above-mentioned automobile sliding door positioning device.

The automobile sliding door and its positioning device provided by the present invention have the following beneficial effects:

First, pull the sliding door to make it slide closed relative to the vehicle body, the first guide wheel slides along the top guide rail, and the second guide wheel slides along the bottom guide rail, so that the sliding door is positioned in the Y direction relative to the vehicle body, and the third guide wheel slides along the bottom guide rail. The wheel slides along the middle guide rail, so that the sliding door is positioned in the X direction relative to the car body, the first support wheel slides along the middle guide rail, and the second support wheel slides along the bottom guide rail, so that the sliding door is positioned relative to the car body in the Z direction. Among them: three Y-direction positioning, two Z-direction positioning and one X-direction positioning of the sliding door maximize the positioning area and improve the stability of positioning.

Second, the relative positions of the first assembly part and the second assembly part of the first hinge assembly can be adjusted, so that the first hinge assembly can adjust the Y-direction position according to the state of the vehicle body; the third assembly part and the fourth assembly part of the second hinge assembly can be adjusted. The accessories can adjust the relative position, so that the second hinge assembly can adjust the Y-direction position according to the state of the body; adjust the position of the nut plate and the stud bolt of the third hinge assembly on the sliding door to adjust the position connected to the stud bolt. The position of the fifth assembly part enables the sliding door to be quickly matched with the vehicle body during the assembly process of the third hinge assembly.

Third, the structure is simplified, which is conducive to assembly, which can reduce the production matching and debugging cycle and cost of prototype vehicles, improve the positioning stability of the sliding door, avoid the quality stability problem caused by insufficient positioning stability, and improve the positioning stability of the sliding door. performance and matching pass rate with body and front door.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the general arrangement structure of a positioning device for a sliding door of an automobile on an automobile sliding door according to an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of the connection between the first hinge assembly and the top guide rail of the automobile sliding door positioning device according to the embodiment of the present invention.

3 is an assembly schematic diagram of the first assembly part and the second assembly part of the first hinge assembly of the automobile sliding door positioning device according to the embodiment of the present invention.

4 is a schematic structural diagram of the connection between the second hinge assembly and the bottom guide rail of the positioning device for an automobile sliding door according to an embodiment of the present invention.

5 is an assembly schematic diagram of the third assembly part and the fourth assembly part of the second hinge assembly of the automobile sliding door positioning device according to the embodiment of the present invention.

6 is an assembly schematic diagram of the third assembly part of the second hinge assembly of the automobile sliding door positioning device according to the embodiment of the present invention.

7 is a schematic structural diagram of the connection between the third hinge assembly and the middle guide rail of the automobile sliding door positioning device according to the embodiment of the present invention.

Fig. 8a is a schematic diagram of the assembly position of the stud bolt of the third hinge assembly of the automobile sliding door positioning device according to the embodiment of the present invention.

Fig. 8b is a schematic structural diagram of a nut plate connected by a stud bolt of a third hinge assembly of an automobile sliding door positioning device according to an embodiment of the present invention.

FIG. 9 is a schematic diagram of the assembly position of the tooling piece of the third hinge assembly of the automobile sliding door positioning device according to the embodiment of the present invention.

10 is a schematic diagram of the fifth assembly of the third hinge assembly of the positioning device for an automobile sliding door according to the embodiment of the present invention and the stud bolts after being assembled.

11 is a schematic structural diagram of a latch assembly of an automobile sliding door positioning device according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to Figures 1-11 in combination, it is Embodiment 1 of the positioning device for a sliding door of an automobile according to the present invention.

As shown in FIG. 1 , the positioning device for the sliding door of the automobile in this embodiment can be applied to the sliding door T of the MPV automobile, which includes: a top rail A that can be fitted and assembled with the top guide rail A installed and fixed on the vehicle body A first hinge assembly 1, a second hinge assembly 2 that can be fitted and assembled with the bottom rail B installed and fixed on the vehicle body, and a third hinge assembly that can be fitted and fitted with the middle rail C installed and fixed on the vehicle body 3.

Wherein: the sliding door T has opposite sides T1, T2, the first hinge assembly 1 and the second hinge assembly 2 are respectively installed at positions close to the end corner of one of the sides T1, as shown in Figure 1 The top end corner area of the side T1 is set as the first hinge assembly 1 , and as shown in FIG. 1 , the bottom end corner area of the side T1 is set as the second hinge assembly 2 . The third hinge assembly 3 is installed near the middle of the other side T2.

The function of the first hinge assembly 1 is to control the Y-direction positioning of the sliding door T relative to the vehicle body when it is slid open or closed, so that the Y-direction level difference and clearance between the sliding door and the top of the vehicle body can be controlled. Wherein: the direction of Y-direction positioning in this embodiment is the direction of the outward pressing force perpendicular to the sliding door T provided by the vehicle body to the sliding door T when the sliding door T is closed relative to the vehicle body.

Referring to Figures 2 to 3 in combination, the top rail A is a combination of an arc-shaped rail and a linear rail with smooth transition fillets, and the top rail A can be assembled to the vehicle body through the corresponding rail mounting parts A1 and mounting nuts A2 superior. The first hinge assembly 1 includes: a first assembly part 11 to be assembled on the sliding door T; a second assembly part 12 capable of adjusting the relative position of the first assembly part 11 ; A guide wheel 13 . Wherein: the outer diameter of the first guide wheel 13 is adapted to the inner diameter of the top guide rail A, which is used to determine the Y-direction position of the top of the sliding door relative to the vehicle body.

The first assembly 11 is a right-angle bent plate, a right-angle side of one side is provided with a positioning screw hole for connecting it to the corresponding position of the sliding door T, and a waist-shaped bolt hole 111 is provided on the right-angle side of the other side. There are two 7x13mm waist holes in this example. The second assembly part 12 is a plate part, and an assembly hole substantially corresponding to the position of the waist-shaped bolt hole 111 and an assembly position 121 for assembling the first guide wheel 13 are defined thereon.

In the specific implementation, the first guide wheel 13 is pressed against the wall surface of the side surface of the guide rail A on the roof of the vehicle body. The relative positions of the fitting 11 and the second fitting 12 are then screwed to realize the functions of positioning the first hinge assembly 1 in the Y direction and fine-tuning the position. In this embodiment, the adjustment range of the relative positions of the first assembly part 11 and the second assembly part 12 is a distance of 3 mm along the Y direction, which can be adjusted according to the state of the vehicle body when the sliding door is assembled.

The function of the second hinge assembly 2 is to control the Y-direction positioning and Z-direction positioning of the sliding door T when the sliding door T is relatively slid open or closed relative to the vehicle body, so that the Y-direction level difference and clearance between the sliding door and the bottom of the vehicle body can be controlled . Control the difference between the sliding door T and the Y direction of the front door and the Z direction of the front part of the sliding door. Wherein: the direction in which the sliding door in this embodiment is positioned in the Z direction relative to the vehicle body is the direction of the gravity of the sliding door itself.

Referring to Figures 4-5, the bottom guide rail B is a combination of an arc guide rail and a linear guide rail with smooth transition fillets, and the top guide rail B can be assembled to the vehicle body through the corresponding guide rail mounting parts B1 and mounting nuts B2. . The second hinge assembly 2 includes: a third assembly 21 for assembling on the sliding door T, a fourth assembly 22 for adjusting the relative position of the third assembly 21, and for controlling the sliding door T relative to the vehicle The second guide wheel 23 for positioning the body in the Y direction and the first support wheel 24 for controlling the Z direction positioning of the sliding door T relative to the vehicle body. Wherein: the outer diameter of the second guide wheel 23 is adapted to the inner diameter of the guide rail of the bottom guide rail B, which is used to determine the Y-direction position of the top of the sliding door relative to the vehicle body.

In the specific implementation, the third assembly 21 is a right-angle bent plate, one right-angle side is provided with mounting screw holes for connecting it to the corresponding position of the sliding door, and the other right-angle side is provided with waist-shaped bolts hole 211. The fourth assembly part 22 is provided with an assembly hole substantially corresponding to the position of the waist-shaped bolt hole 211 . Wherein: the second guide wheel 23 and the first support wheel 24 are respectively installed on the fourth assembly 22, the second guide wheel 23 is pressed against the two side walls of the bottom guide rail B of the vehicle body, and the first support wheel 24 is pressed against Press on the bottom wall of the bottom rail B of the vehicle body.

In specific implementation, after the fastening bolts 25 pass through the assembly holes and the waist-shaped bolt holes 211 roughly corresponding to the above positions, the relative positions of the third assembly part 21 and the fourth assembly part 22 can be adjusted as required, and then screwed to The functions of positioning and fine-tuning the position of the second hinge assembly 2 in the Y direction are realized. In this embodiment, the adjustment range of the relative positions of the third assembly part 21 and the fourth assembly part 22 is a distance of 3 mm along the Y direction, so as to be adjusted according to the state of the vehicle body when the sliding door is assembled.

Preferably, the second hinge assembly 2 further comprises: an adjustment mechanism 26 for raising or lowering the position of the second hinge assembly 2 relative to the vehicle door, as shown in FIG. 6 , the adjustment mechanism 26 is used for when the sliding door sags Perform reverse compensation.

The function of the third hinge assembly 3 is to control the X-direction positioning and Z-direction positioning when the sliding door T is relatively slid open or closed relative to the vehicle body, wherein: the sliding door in this embodiment is positioned relative to the vehicle body in the X-direction The direction of the direction is the direction perpendicular to the Y-direction positioning direction and the Z-direction positioning direction, and further, it is the direction in which the vehicle body acts on the side T1 of the sliding door T to provide the pressing force to the side T2.

Referring to Figures 7 to 10, the middle guide rail C is a combination of an arc guide rail and a linear guide rail with smooth transition fillets, and the middle guide rail C can be assembled to the vehicle body through the corresponding guide rail mounting parts C1 and mounting nuts C2. . The third hinge assembly 3 includes: a fifth assembly part 31 , a nut plate 32 , a tooling part 33 , a third guide wheel 34 for controlling the X-direction positioning of the sliding door T relative to the vehicle body, and a third guide wheel 34 for controlling the sliding door T The second support wheel 35 is positioned relative to the vehicle body in the Z direction. Wherein: the third guide wheel 34 and the second support wheel 35 are respectively installed at the end positions of the fifth assembly 31 .

During the specific implementation, the nut plate 32 and the tooling piece 33 are respectively provided with mounting holes 321 and 331 which can be matched with each other and fix the two on the sliding door, and the fifth mounting piece 31 is also provided with a fixing stud bolt 36 assembly hole 311. In the specific implementation, an assembly hole is provided in the corresponding position of the sliding door, and one end of the stud bolt 36 passes through the assembly hole 331 of the tooling piece 33 and the assembly hole 321 of the nut plate 32. After the position is determined, use the stud bolt 36 to assemble the nut plate. 32 and the fixture 33 are fixed on the sliding door T, and then, the mounting hole 311 of the fifth fitting 31 passes through the other end of the stud bolt 36, and the fifth fitting 31 is fixed on the sliding door using a tightening nut Above, the adjustment range of the stud bolt 36 is a distance of 3 mm along the XZ direction.

Through the above structure, the position of the nut plate 32 and the stud bolt 36 on the sliding door can be changed by adjusting the tooling piece 33 , and the position of the fifth fitting 31 connected to the stud bolt 36 can be adjusted. Further, the third guide wheel 34 is pressed against the two side walls of the middle guide rail C of the vehicle body to control the X-direction positioning of the sliding door T relative to the vehicle body, and the second support wheel 35 is pressed against the middle of the vehicle body. The bottom wall of the guide rail C is used to control the Z-direction positioning of the sliding door relative to the vehicle body.

Further, the positioning device of the automobile sliding door in this embodiment further includes: a latch assembly 4 for controlling the Y-direction positioning of the sliding door relative to the vehicle body. As shown in FIG. 11 , the latch assembly 4 is installed in the middle of the side of the sliding door T where the second hinge assembly 2 is installed. In specific implementation, the lock catch assembly 4 includes: a lock body 41 disposed on the sliding door T, and the lock body 41 has a lock tongue 411 that can be adapted to the lock catch 42 installed on the vehicle body. The lock body 41 is assembled to the sliding door through locking bolts 43, and the lock catch 42 is also locked at the corresponding position of the vehicle body by corresponding bolts. After the sliding door T is slid and closed relative to the vehicle body, the lock catch 42 is inserted into the lock Fastening is achieved in the tongue 411 to control the Y-direction difference between the sliding door and the side wall of the vehicle body.

During the specific implementation of the positioning device of the automobile sliding door in this embodiment, the sliding door T is pulled to make it slide closed relative to the vehicle body, the first guide wheel 13 slides along the top guide rail A, and the second guide wheel 23 slides along the bottom guide rail B Sliding, the sliding door T is positioned in the Y direction relative to the vehicle body, the third guide wheel 34 slides along the middle guide rail C, the sliding door T is positioned in the X direction relative to the vehicle body, and the first supporting wheel 24 slides along the bottom guide rail B, The second support wheel 35 slides along the middle guide rail C, and the sliding door is positioned in the Z direction relative to the vehicle body. After the sliding door T is slid and closed relative to the vehicle body, the lock catch 42 is inserted into the lock tongue 411 to realize fastening, so that the sliding door T is positioned in the Y direction relative to the vehicle body. One Z-direction positioning and one X-direction positioning maximize the positioning area and improve the stability of positioning.

The present invention also discloses an automobile sliding door, which includes the above-mentioned positioning device for the automobile sliding door, and the specific embodiments will not be repeated.

The automobile sliding door and its positioning device provided by the present invention have the following beneficial effects:

First, pull the sliding door to make it slide closed relative to the vehicle body, the first guide wheel slides along the top guide rail, and the second guide wheel slides along the bottom guide rail, so that the sliding door is positioned in the Y direction relative to the vehicle body, and the third guide wheel slides along the bottom guide rail. The wheel slides along the middle guide rail, so that the sliding door is positioned in the X direction relative to the car body, the first support wheel slides along the middle guide rail, and the second support wheel slides along the bottom guide rail, so that the sliding door is positioned relative to the car body in the Z direction. Among them: three Y-direction positioning, two Z-direction positioning and one X-direction positioning of the sliding door maximize the positioning area and improve the stability of positioning.

Second, the relative positions of the first assembly part and the second assembly part of the first hinge assembly can be adjusted, so that the first hinge assembly can adjust the Y-direction position of the sliding door according to the state of the vehicle body; the third assembly part of the second hinge assembly and The fourth assembly can adjust the relative position, so that the second hinge assembly can adjust the Y-direction position of the sliding door according to the state of the body, and adjust the position of the nut plate and stud bolt of the third hinge assembly on the sliding door to adjust the connection. The position of the fifth fitting on the stud enables quick matching of the sliding door with the vehicle body during the assembling process of the third hinge assembly.

Third, the structure is simplified, which is conducive to assembly, which can reduce the production matching and debugging cycle and cost of prototype vehicles, improve the positioning stability of the sliding door, avoid the quality stability problem caused by insufficient positioning stability, and improve the positioning stability of the sliding door. performance and matching pass rate with body and front door.

Claims (6)

1. a positioning device of an automobile sliding door, is characterized in that, comprises: a first hinge assembly capable of being fitted with a top guide rail on the vehicle body, the first hinge assembly having a first guide wheel for controlling the Y-direction positioning of the sliding door relative to the vehicle body; A second hinge assembly that can be adapted to fit with the bottom rail on the vehicle body, the second hinge assembly has a second guide wheel for controlling the Y-direction positioning of the sliding door relative to the vehicle body and a a first support wheel for controlling the Z-direction positioning of the sliding door relative to the vehicle body; A third hinge assembly that can be adapted to fit with the middle guide rail on the vehicle body, the third hinge assembly has a third guide wheel for controlling the X-direction positioning of the sliding door relative to the vehicle body and a A second supporting wheel for controlling the Z-direction positioning of the sliding door relative to the vehicle body; the sliding door has opposite sides, and the first hinge assembly and the second hinge assembly are respectively installed is arranged at a position close to the end corner of one of the side edges, and the third hinge assembly is arranged at a central position close to the other side edge; Pull the sliding door to make it slide closed relative to the vehicle body, the first guide wheel slides along the top guide rail, and the second guide wheel slides along the bottom guide rail, so that the sliding door is relative to the vehicle body The body is positioned in the Y direction, the third guide wheel slides along the middle guide rail, so that the sliding door is positioned in the X direction relative to the vehicle body, the first support wheel slides along the middle guide rail, and the second support wheel slides along the middle guide rail. The wheel slides along the bottom guide rail, so that the sliding door is positioned in the Z direction relative to the vehicle body; The third hinge assembly includes: a fifth assembly part, a nut plate and a tooling part, the nut plate and the tooling part are respectively provided with assembly holes that can be matched with each other and fixed on the sliding door , after one end of the stud goes through the fitting hole of the tooling piece and the fitting hole of the nut plate, use the stud bolt to fix the nut plate and the tooling piece on the sliding plate after the position is determined. On the door, the assembling hole of the fifth fitting passes through the other end of the stud bolt, and the fifth fitting is fixed on the sliding door using a tightening nut; The first hinge assembly includes: a first assembly part for assembling on the sliding door and a second assembly part capable of adjusting the relative position of the first assembly part, wherein: the first assembly part and/or The second assembly part is provided with a waist-shaped bolt hole; the first guide wheel is installed on the second assembly part, and the first guide wheel is pressed against both sides of the top guide rail of the vehicle body on the wall. 2 . The positioning device for an automobile sliding door according to claim 1 , further comprising: a latch assembly for controlling the Y-direction positioning of the sliding door relative to the vehicle body, and the lock The buckle assembly is installed in the middle of the side edge of the sliding door on which the second hinge assembly is installed. 3 . The positioning device for an automobile sliding door according to claim 2 , wherein the latch assembly comprises: a lock body disposed on the sliding door, the lock body having a The lock tongue fitted with the lock button installed on the upper body. 4. The positioning device of the automobile sliding door according to claim 1, wherein the second hinge assembly comprises: a third fitting for assembling on the sliding door, and a third fitting that can be adjusted to the third A fourth assembly at a relative position of the assembly, wherein: the third assembly and/or the fourth assembly is provided with a waist-shaped bolt hole; The second guide wheel and the first support wheel are respectively installed on the fourth fitting, the second guide wheel is pressed against the two side walls of the bottom guide rail of the vehicle body, and the first A support wheel is pressed against the bottom wall of the bottom rail of the vehicle body. 5 . The positioning device for a sliding door of an automobile according to claim 1 , wherein the direction in which the sliding door is positioned in the Y direction relative to the vehicle body is that the sliding door is closed relative to the vehicle body. 6 . In the state, the direction of the pressing force provided by the vehicle body to the sliding door is perpendicular to the outward direction of the sliding door; The direction in which the sliding door is positioned in the Z direction relative to the vehicle body is the direction of the gravity of the sliding door itself; The direction in which the sliding door is positioned in the X-direction relative to the vehicle body is a direction perpendicular to the Y-direction positioning direction and the Z-direction positioning direction, respectively. 6. An automobile sliding door, characterized in that the automobile sliding door comprises the positioning device for an automobile sliding door according to any one of claims 1-5.

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