CN110656831A

CN110656831A - Vehicle and sliding mechanism of sliding door thereof

Info

Publication number: CN110656831A
Application number: CN201810689031.0A
Authority: CN
Inventors: 张振富; 鲍涛; 唐成; 邓为; 尹坤朋; 樊俊龙; 祝前广; 陈明胜; 纪博宇; 刘猛
Original assignee: SAIC Motor Corp Ltd
Current assignee: SAIC Motor Corp Ltd
Priority date: 2018-06-28
Filing date: 2018-06-28
Publication date: 2020-01-07

Abstract

The invention discloses a vehicle and a sliding mechanism of a sliding door thereof, wherein the sliding mechanism comprises a fixed bracket, a movable bracket and a power part, the fixed bracket and the movable bracket are arranged between a vehicle body and the sliding door, the fixed bracket is fixed on the sliding door, the movable bracket is arranged on the fixed bracket and connected with the vehicle body, and the power part can drive the movable bracket to move relative to the fixed bracket so as to open or close the sliding door. Because glide machanism arranges in between door and the automobile body, does not occupy the space in the car basically, electric automobile can adopt the great electric core of volume, and then improves this electric automobile's duration. In addition, the mechanism realizes the opening and closing of the sliding door by rolling three wheels with rolling and guiding functions on the movable support in a track provided by the fixed support, the rollers are in line connection with the track through the structure optimization design, the contact resistance in the rolling process is reduced as much as possible so as to reduce the power of a driving motor and reduce the service life reduction caused by the abrasion of the contact resistance, and the working reliability of the sliding mechanism is reduced.

Description

Vehicle and sliding mechanism of sliding door thereof

Technical Field

The invention relates to the technical field of automobile parts, in particular to a vehicle and a sliding mechanism of a sliding door of the vehicle.

Background

With the rapid increase of automobile holding capacity, energy crisis, air pollution and CO₂The environmental problems such as emission and the like are increasingly prominent, and the automobile industry is promoted to carry out a great deal of research on the aspects of energy conservation and emission reduction. Meanwhile, pure electric vehicles with the characteristics of zero emission and zero pollution are rapidly developed and popularized in various large automobile companies and are greatly supported by governments of various countries.

How to shorten the charging time of the electric vehicle and improve the endurance mileage is two key problems faced by various large automobile companies in the process of developing pure electric vehicles. On the basis of increasing the endurance mileage of the electric vehicle, on one hand, the energy density of the battery needs to be improved, and on the other hand, the whole vehicle layout is optimized in the whole vehicle development process, so that more space layout electric cores are increased.

For an electric automobile with a sliding door, the sliding door is connected with a lower hinge and a guide rail mechanism, and the sliding door is opened and closed through the lower hinge and the guide rail mechanism. Specifically, the lower hinge mechanism comprises a fixed support and a moving support hinged with the fixed support, wherein the moving support is provided with two guide wheels and a bearing wheel, the bearing wheel is used for bearing the sliding door, and the guide wheels are used for guiding the lower hinge mechanism and the sliding door to move along the sliding track.

When the lower hinge mechanism works, the motion bracket can transversely and longitudinally move along the vehicle body relative to the guide rail fixed on the vehicle body, under the normal condition, the lower hinge mechanism is arranged between the vehicle door and the vehicle body, and in order to ensure the motion space of the enough motion bracket, enough space needs to be reserved in the vehicle for the motion bracket to transversely rotate. Meanwhile, when the sliding rail is arranged in the vehicle, the sliding rail occupies the space in the vehicle along the longitudinal direction. And the transverse and longitudinal spaces in the vehicle, occupied by the moving bracket and the sliding rail, are the areas where the electric automobile battery cores are arranged.

Therefore, the lower hinge mechanism causes the limited arrangement space of the battery cell, and is not beneficial to improving the endurance mileage of the electric automobile.

In view of this, a technical problem to be solved by those skilled in the art is to provide an electric vehicle, which can reduce a vehicle interior space occupied by a sliding door mechanism of a sliding door, so that a battery cell has a larger arrangement space to increase a mileage of the electric vehicle.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a sliding mechanism for a sliding door, including a fixed bracket, a movable bracket and a power component, wherein the fixed bracket and the movable bracket are disposed between a vehicle body and the sliding door, the fixed bracket is fixed to the sliding door, the movable bracket is mounted on the fixed bracket and connected to the vehicle body, and the power component can drive the movable bracket to move relative to the fixed bracket to open or close the sliding door.

According to the electric automobile, the sliding mechanism enables the movable support to move relatively along the fixed support through the optimized design of the structure, so that the sliding door can move transversely along the automobile body, the space in the automobile is not occupied, when the sliding mechanism is used for the electric automobile, the sliding mechanism can be prevented from occupying the installation space of an electric core in the automobile, the electric automobile can adopt the electric core with larger volume, and the cruising ability of the electric automobile is improved.

Optionally, the fixed bracket has a track extending along the opening and closing direction of the sliding door, and the movable bracket can slide or roll along the track.

Optionally, the movable support comprises an installation part and a roller pair, the installation part is used for connecting the sliding door moving support, the roller pair comprises a roller and a first rolling wheel connected to the roller, the installation part is fixed on the roller, so that the first rolling wheel drives the sliding door moving support to move along the opening and closing direction of the sliding door when rolling in the track, and then the sliding door is opened or closed.

Optionally, the installation department still be connected with the first leading wheel of track adaptation, first leading wheel can follow under the drive of installation department the track slides or rotates.

Optionally, the sliding door motion bracket is fixed to the mounting plate, the first guide wheel is connected with the mounting plate through a rotating shaft, so that the first guide wheel can rotate in the track, the mounting plate is provided with a first flanging extending towards the inside of the track, the first flanging is fixed to the roller, and the mounting plate is the mounting portion.

Optionally, the fixed support is provided with a rectangular groove extending along the opening and closing direction of the sliding door, two side walls of the groove are respectively provided with a second flanging bent inwards along the transverse direction, and the second flanging and the groove form the track in an enclosing manner;

and a preset gap is formed between the two second flanges, so that the rotating shaft and the first flanges can extend into the track through the opening.

Optionally, a first predetermined gap is formed between the first rolling wheel and the second flanging along the vertical direction, and a second predetermined gap is formed between the first guide wheel and the side wall of the rail along the transverse direction.

Optionally, the first guide wheel has a profile surface that is partially spherical so as to make line contact with the side wall of the rail.

Optionally, the fixed bracket is provided with a first limiting block and a second limiting block which are distributed along the opening and closing direction of the sliding door, and the first limiting block and the second limiting block are located on the motion track of the movable bracket, so that the movable bracket can move between the first limiting block and the second limiting block;

when the movable support abuts against the first limiting block, the sliding mechanism is in an extending state, and when the movable support abuts against the second limiting block, the sliding mechanism is in a contracting state.

Optionally, the power component comprises a motor and a belt connected to an output shaft of the motor, and the belt is connected with the movable support;

the fixed support is provided with a plurality of second guide wheels, and the belt is wound on the second guide wheels.

Optionally, the automatic control device is further included and is used for controlling the motor to rotate forwards or backwards according to a door opening signal and a door closing signal of the vehicle.

In addition, the invention also provides a vehicle which comprises a vehicle body and the sliding door, wherein the sliding door is connected with the vehicle body through a sliding mechanism, and the sliding mechanism is the sliding mechanism.

Drawings

FIG. 1 is a schematic structural diagram of a sliding mechanism according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with the sliding door bracket removed;

FIG. 3 is a schematic structural view of the movable support in FIG. 1;

fig. 4 is a partial side view of fig. 1.

In FIGS. 1-4:

1, a fixed support, 11 tracks, 12 second guide wheels, 13 first limit blocks, 14 second limit blocks, 15 second flanging and 16 through holes;

2, a movable support, 21 first rolling wheels, 22 rolling shafts, 23 first guide wheels, 24 rotating shafts, 25 mounting plates, 251 first flanging, 252 limiting matching blocks, 26 sliding door moving frames, 261 fixing plates, 262 second rolling wheels and 263 third guide wheels;

3, a motor and 4 belts;

a first predetermined gap, B second predetermined gap.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-4, fig. 1 is a schematic structural diagram of a sliding mechanism according to an embodiment of the present invention; FIG. 2 is a schematic view of the structure of FIG. 1 with the sliding door bracket removed; FIG. 3 is a schematic structural view of the movable support in FIG. 1; fig. 4 is a partial side view of fig. 1.

It should be noted that the terms of orientation such as "longitudinal", "lateral", and "vertical" are defined in terms of the traveling direction of the vehicle (the longitudinal direction of the vehicle), where "longitudinal" refers to the same direction as the traveling direction of the vehicle, "lateral" refers to a direction perpendicular to the traveling direction of the vehicle within the traveling plane (the width direction of the vehicle), and "vertical" refers to a direction perpendicular to the traveling plane (the height direction of the vehicle). It is to be understood that the presence of the above directional terms is not to be taken as an absolute limitation on the scope of the invention.

In a specific embodiment, the present invention provides a sliding mechanism for a sliding door of a vehicle, the sliding mechanism is disposed between a vehicle body and a vehicle door, as shown in fig. 1, and comprises a fixed bracket 1, a movable bracket 2 and a power component, wherein the fixed bracket 1 is fixed to the vehicle body, the movable bracket 2 is used for connecting the sliding door, and the power component can drive the movable bracket 2 to move relative to the fixed bracket 1 along an opening and closing direction of the sliding door, so as to open or close the sliding door.

According to the electric automobile, the sliding mechanism enables the movable support to move along the fixed support in a relative mode through structural optimization design to achieve the transverse movement of the sliding door along the automobile body, so that the sliding mechanism does not occupy the space in the automobile, when the sliding mechanism is used for the electric automobile, the sliding mechanism can be prevented from occupying the installation space of an electric core in the automobile, the electric automobile can adopt the electric core with larger size, and the cruising ability of the electric automobile is further improved.

Specifically, as shown in fig. 2, the stationary bracket 1 has a rail 11 extending in the opening and closing direction of the sliding door, and the movable bracket 2 can slide or roll along the rail 11.

In this embodiment, the rail 11 is provided to enable the movable bracket 2 to move linearly in the rail 11 of the fixed bracket 1, and since the opening and closing direction of the sliding door is substantially along the length direction (longitudinal direction) of the vehicle body, that is, the rail 11 extends substantially along the length direction of the vehicle body, during the opening and closing process of the sliding door, the movable bracket 2 moves linearly substantially along the length direction of the vehicle body with respect to the fixed bracket 1, that is, the movable bracket 2 does not occupy the space in the width direction (lateral direction) of the vehicle body during the movement process, and compared with the prior art in which the movable bracket rotates in the width direction of the vehicle body with respect to the fixed bracket, the occupied space of the sliding mechanism can be further reduced.

More specifically, as shown in fig. 3, the movable bracket 2 includes a mounting portion and a roller pair, wherein the roller pair includes a roller 22 and a first roller 21 connected to the roller 22. In the embodiment shown in fig. 3, two first rolling wheels 21 are respectively connected to two ends of the roller 22 in the axial direction, and the two first rolling wheels 21 roll in the track 11, so that the movable support 2 can move linearly in the track 11.

Meanwhile, the mounting portion is used for connecting the sliding door moving bracket 26 of the sliding door and is fixed to the roller 22, so that when the first roller 21 rolls in the rail 11, the mounting portion drives the sliding door moving bracket 26 to move linearly along the opening and closing direction of the sliding door (the axial direction of the rail 11), and the sliding door is opened or closed.

Therefore, the movable support 2 and the fixed support 1 realize relative movement through rolling of the rollers, and through structural optimization design, the rollers and the tracks reduce contact resistance through line contact, so that the power of the driving motor is reduced, the abrasion in the rolling process is reduced, and the service life of the whole sliding mechanism is prolonged.

It will be understood that the movement of the mobile carriage 2 with respect to the fixed carriage 1 need not necessarily be achieved by means of the first rolling wheel 21, but that the mobile carriage 2 can also slide within the track 11 with respect to the fixed carriage 1, for example, the mobile carriage 2 can comprise a slide in the track 11, which is able to slide within the track 11. However, in the present embodiment, when the movable bracket 2 rolls in the track 11 by the first rolling wheel 21, the resistance between the movable bracket and the track 11 is small, and the track 11 and the movable bracket 2 are not easily worn, so that the power source can be saved and the service life can be prolonged.

The number of the first rolling wheels 21 is not limited to two, and one or more first rolling wheels 21 may be connected to the roller 22, and thus the number of the first rolling wheels 21 is not limited in the present invention.

Further, as shown in fig. 3, a first guide wheel 23 adapted to the rail 11 is further connected to the mounting portion, and the first guide wheel 23 can slide or rotate along the rail 11 under the driving of the mounting portion.

When the mounting part moves linearly along the rail 11 under the driving of the first rolling wheel 21, the first guide wheel 23 is driven to move along the rail 11 along with the mounting part, and the first guide wheel 23 can play a role in guiding in the moving process of the first rolling wheel 21 in the rail 11, so that the moving stability of the first rolling wheel 21 in the rail 11 is improved.

Specifically, as shown in fig. 3, the sliding door motion bracket 26 is fixed to the mounting plate 25, and specifically, the sliding door motion bracket 26 is positioned above the mounting plate 25 and bolted to the mounting plate 25. Meanwhile, the first guide wheel 23 is connected with the mounting plate 25 through the rotating shaft 24, so that when the mounting plate 25 moves linearly in the track 11, the first guide wheel 23 has a tendency to move along with the mounting plate 25, and under the action of the side wall of the track 11, the first guide wheel 23 rotates around the rotating shaft 24, that is, the first guide wheel 23 rolls along the side wall of the track 11, so that the first guide wheel 23 moves along with the mounting plate 25.

Meanwhile, the mounting plate 25 has a first flange 251 extending toward the inside of the track 11, and the first flange 251 is fixed to the roller 22, so that the roller 22 can drive the mounting plate 25 to move linearly when driven by the first roller 21. The mounting plate 25 is the mounting portion described above.

It can be understood that the first guide wheel 23 and the mounting plate 25 are not necessarily connected through the rotating shaft 24, but may be directly and fixedly connected, and in this case, the first guide wheel 23 is driven by the mounting plate 25 to slide linearly along the track 11. Similarly, in the present embodiment, when the first guide wheel 23 rolls along the side wall of the rail 11 in the rail 11, the resistance between the first guide wheel and the rail 11 and the wear between the first guide wheel and the rail during the movement are small.

On the other hand, as shown in fig. 2, the fixed bracket 1 is provided with a rectangular groove extending along the opening and closing direction of the vehicle door, the upper ends of the two side walls of the groove are respectively provided with a second flanging 15 bending inwards along the transverse direction, the second flanging 15 and the groove enclose the track 11, and a predetermined gap is formed between the two second flanging 15, so that the track 11 is a cuboid structure with an open upper end, and the rotating shaft 24 and the first flanging 251 can extend into the track 11 through the opening between the two second flanging 15.

As described above, in order to ensure the linear movement of the movable bracket 2 along the rail 11 and improve the stability of the linear movement, the second flange 15 and the bottom wall of the rail 11 in the rail 11 limit the freedom of the first rolling wheel 21 in vertical movement, and the two lateral walls of the rail 11 limit the freedom of the first guide wheel 23 in lateral movement. Meanwhile, in order to ensure that the first rolling wheel 21 can roll in the longitudinal direction in the track 11 and the second guide wheel 23 can freely rotate and move in the longitudinal direction in the track 11, the first rolling wheel 21 and the first guide wheel 23 are blocked by the wall surface track 11.

Therefore, as shown in fig. 4, a first predetermined gap a is formed between the first rolling wheel 21 and the second flange 251 in the vertical direction, and the first predetermined gap a may be, for example, 0.5 to 0.8 mm. Meanwhile, the first guide wheel 23 has a second predetermined gap B with the side wall of the track 11 along the transverse direction, for example, the second predetermined gap B may be specifically 0.25 to 0.4mm, and the first guide wheel 23 may have a gap with the side wall of the track 11, or may have a gap with both side walls.

On the other hand, the contour surface of the first guide wheel 23 is a partial spherical surface so as to be in line contact with the two side walls of the track 11, thereby reducing the fluctuation of the movement of the first guide wheel 23 caused by the tolerance of the contour degree of the side walls of the track 11 and further improving the movement stability of the movable bracket 2.

In the above embodiments, as shown in fig. 1 and fig. 2, the fixed bracket 1 is provided with the first stopper 13 and the second stopper 14 distributed along the opening and closing direction of the sliding door, and the first stopper 13 and the second stopper 14 are located on the movement track of the movable bracket 2, so that the movable bracket 2 can be driven by the power component to move between the first stopper 13 and the second stopper 14, that is, the first stopper 13 and the second stopper 14 define two limit positions of the movable bracket 2.

When the movable support 2 moves to abut against the first limiting block 13, the sliding mechanism is in an extending state, the sliding door is in an opening state, and when the movable support 2 moves to abut against the second limiting block 14, the sliding mechanism is in a contracting state, and the sliding door is in a closing state.

Specifically, as shown in fig. 2 and 3, the mounting plate 25 of the movable bracket 2 has a limit fitting block 252, and when one end of the limit fitting block 252 in the longitudinal direction abuts against the first limit block 13, the sliding mechanism is in an extended state, and when the other end of the limit fitting block 252 in the longitudinal direction abuts against the second limit block 14, the sliding mechanism is in a retracted state.

Therefore, in this embodiment, the two limit blocks having a simple structure are provided, so that the limit positions of the movable bracket 2 can be considered to be specified.

In addition, in the above embodiments, as shown in fig. 1, the power component includes the motor 3 and the belt 4 connected to the output shaft of the motor 3, wherein the motor 3 is located in the vehicle, the fixed bracket 1 has the through hole 16, and the belt 4 is connected to the movable bracket 2 after extending out of the through hole 16. Specifically, as shown in fig. 2, the belt 4 is fixed to the mounting plate 25.

In addition, a plurality of second guide wheels 12 are arranged on the fixed support 1, and the belt 4 is wound on each second guide wheel 12, so that the movable support 2 moves along the tangential direction of the second guide wheels 12 under the driving of the belt 4. At the same time, the belt 4 can move in two opposite directions on the second guide wheel 12, thereby realizing the linear reciprocating motion of the movable bracket 2 along the track 11.

In addition, the mechanism realizes the opening and closing of the sliding door by the rolling of three wheels with rolling and guiding functions on the movable support 2 in the track provided by the fixed support 1, the rollers are in line connection with the track through the structure optimization design, the contact resistance in the rolling process is reduced as much as possible so as to reduce the power of a driving motor and reduce the service life reduction caused by the abrasion of the contact resistance, and the working reliability of the sliding mechanism is reduced.

Further, an automatic control device is included for controlling the motor 3 to rotate forward or backward according to a door opening signal and a door closing signal of the vehicle, so that the movable bracket 2 is linearly reciprocated along the rail 11.

In particular, the motor 3 is controlled by a programmable controller capable of receiving door opening and closing signals of the sliding door.

When the sliding mechanism is in a contraction state, the limit matching block 252 of the movable support 2 abuts against the second limit block 14, at this time, after the programmable controller receives an opening signal of the sliding door, the programmable controller controls the motor 3 to rotate positively, the belt 24 drives the movable support 2 to move towards the first limit block 13, when the programmable controller moves to the limit matching block 252 to abut against the first limit block 13, the sliding mechanism is in an extended limit state, and at this time, the sliding door can slide on the sliding door moving support 26 of the sliding mechanism so as to open the sliding door.

When the sliding mechanism is in the extension state, the limit matching block 252 of the movable support 2 abuts against the first limit block 13, at this time, after the programmable controller receives a closing signal of the sliding door, the control motor 3 rotates reversely, the belt 24 drives the movable support 2 to move towards the second limit block 14, when the sliding mechanism moves to the limit matching block 252 to abut against the second limit block 14, the sliding mechanism is in the limit state of contraction, and at this time, the sliding door can slide on the sliding door moving support 26 of the sliding mechanism, so as to close the sliding door.

In addition, in the reciprocating motion process of the movable support 2, when the movable support moves to a distance away from the corresponding limiting block, the motor 3 can be controlled to be closed, and at the moment, the movable support 2 can continue to move under the action of inertia to abut against the corresponding limiting block.

As shown in fig. 3, the sliding door moving bracket 26 includes a fixed plate 261 bolted to the moving bracket 2, and a second rolling wheel 262 and a third guiding wheel 263 are connected to the upper side of the fixed plate 261 for guiding the sliding door to open or close.

In addition, the invention also provides a vehicle, which comprises a vehicle body and a sliding door, wherein the sliding door is connected with the vehicle body through a sliding mechanism, and the sliding mechanism is the sliding mechanism in any embodiment. Since the above-mentioned sliding mechanism has the above-mentioned technical effects, the vehicle including the sliding mechanism should also have corresponding technical effects, and the details are not described herein.

It should be noted that the sliding mechanism in the present invention is not limited to be used in an electric vehicle, and may be applied to any vehicle with a sliding door.

The vehicle and the sliding mechanism of the sliding door thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a glide machanism of door that slides, characterized in that, including deciding support (1), moving support (2) and power parts, decide support (1) with move support (2) and set up between automobile body and the door that slides, just decide support (1) and be fixed in the door that slides, move support (2) install in decide support (1) and with car connection, power parts can drive move support (2) for decide support (1) and remove to open or close the door that slides.

2. Sliding mechanism according to claim 1, characterized in that the stationary carriage (1) has a rail (11) extending in the opening and closing direction of a sliding door, the movable carriage (2) being slidable or rollable along the rail (11).

3. Sliding mechanism according to claim 2, wherein the moving support (2) comprises a mounting part and a pair of rollers, the mounting part is used for connecting a sliding door moving support (26), the pair of rollers comprises a roller (22) and a first rolling wheel (21) connected to the roller (22), and the mounting part is fixed to the roller (22), so that when the first rolling wheel (21) rolls in the track (11), the sliding door moving support (26) is driven to move along the opening and closing direction of the sliding door, thereby opening or closing the sliding door.

4. Sliding mechanism according to claim 3, wherein the mounting part is further connected with a first guide wheel (23) adapted to the rail (11), and the first guide wheel (23) can slide or rotate along the rail (11) under the driving of the mounting part.

5. Sliding mechanism according to claim 4, characterized in that the sliding door motion bracket (26) is fixed to a mounting plate (25), the first guide wheel (23) is connected to the mounting plate (25) by a shaft (24) so that the first guide wheel (23) can rotate in the track (11), the mounting plate (25) has a first flange (251) extending towards the inside of the track (11), the first flange (251) is fixed to the roller (22), and the mounting plate (25) is the mounting portion.

6. Sliding mechanism according to claim 5, wherein the fixed bracket (1) is provided with a rectangular groove extending along the opening and closing direction of the sliding door, two side walls of the groove are respectively provided with a second flanging (15) bending inwards along the transverse direction, and the second flanging (15) and the groove enclose the track (11);

a preset gap is reserved between the two second flanges (15), so that the rotating shaft (24) and the first flange (251) can extend into the track (11) through the opening.

7. Glide mechanism according to claim 6, wherein, in vertical direction, there is a first predetermined clearance (a) between the first roller wheel (21) and the second collar (16), and in transverse direction, there is a second predetermined clearance (B) between the first guide wheel (23) and the side wall of the rail (11).

8. Glide mechanism according to claim 5, wherein the profile surface of the first guide wheel (23) is part spherical so that it makes line contact with the side wall of the rail (11).

9. Sliding mechanism according to any one of claims 2-8, characterized in that the fixed bracket (1) is provided with a first stopper (13) and a second stopper (14) distributed along the sliding door opening and closing direction, and the first stopper (13) and the second stopper (14) are located on the motion trajectory of the movable bracket (2) so that the movable bracket (2) can move between the first stopper (13) and the second stopper (14);

when the movable support (2) abuts against the first limiting block (13), the sliding mechanism is in an extending state, and when the movable support (2) abuts against the second limiting block (14), the sliding mechanism is in a contracting state.

10. Sliding mechanism according to any of claims 2-8, characterized in that the power unit comprises an electric motor (3) and a belt (4) connected to an output shaft of the electric motor (3), the belt (4) being connected to the movable carriage (2);

decide support (1) and be equipped with a plurality of second leading wheels (12), belt (4) around arranging in second leading wheel (12).

11. Sliding mechanism according to claim 10, further comprising automatic control means for controlling said electric motor (3) to rotate forward or backward depending on the door opening and closing signals of the vehicle.

12. A vehicle comprising a vehicle body and a sliding door, wherein the sliding door is connected with the vehicle body through a sliding mechanism, and the sliding mechanism is the sliding mechanism according to any one of claims 1-11.