A seat slide rail and a driving mechanism for the seat slide rail

Abstract

The present application relates to a seat slide rail and a driving mechanism thereof. The seat slide rail includes at least one set of slide rail assemblies (20), and each slide rail assembly (20) includes an upper slide rail (201) and a lower slide rail (202). The driving mechanism (10) includes a driving part (1) and a transmission part (3) provided corresponding to each slide rail assembly (20) one by one. The transmission part (3) is relatively fixed to the upper slide rail (201) or the lower slide rail (202). The driving part (1) is in transmission connection with the transmission part (3) through a first shaft (4), and the first shaft (4) is a flexible shaft. The driving part (1) includes at least one motor (11), and when the number of motors (11) is at least two, the motors (11) are connected through a second shaft (12), and the second shaft (12) is connected by a flexible shaft or a rigid shaft. When the position of the seat is adjusted through the driving mechanism (10), vibration can be reduced, noise can be lowered, the user experience can be improved, and at the same time, the cost can be reduced and the flexibility can be increased.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a seat slide rail and a driving mechanism for the seat slide rail. Background Art

[0002] The seat slide rails mainly connect the seat basin and the vehicle floor. The seat slide rails include two sets of parallel slide rail assemblies. Each set of slide rail assemblies includes an upper slide rail and a lower slide rail. The upper slide rail is connected to the seat basin, and the lower slide rail is connected to the vehicle floor. The upper slide rail can slide back and forth relative to the lower slide rail to achieve the front and rear adjustment of the seat.

[0003] When the upper slide rail is driven by the driving mechanism to slide relative to the lower slide rail, vibration will be generated and transmitted to the upper slide rail, resulting in loud noise when the seat position is adjusted, and the user experience is poor.

[0004] When adjusting the position of the seat, how to reduce vibration, lower noise and improve user experience is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] The purpose of the present application is to provide a seat slide rail and a driving mechanism for the seat slide rail, which can reduce vibration, reduce noise and improve user experience when adjusting the position of the seat.

[0006] In order to solve the above technical problems, the present application provides a driving mechanism for a seat slide, the seat slide includes at least one group of slide rail assemblies, the slide rail assembly includes an upper slide rail and a lower slide rail, the driving mechanism is used to drive the upper slide rail to slide relative to the lower slide rail, the driving mechanism includes a driving part and a transmission part respectively arranged in a one-to-one correspondence with each of the slide rail assemblies, the transmission part is relatively fixed to the upper slide rail or the lower slide rail; the driving part is connected to the transmission part through a first shaft, the transmission part can convert the rotation of the first shaft into a linear motion between the upper slide rail and the lower slide rail, the first shaft is a soft shaft; the driving part includes at least one motor, and when the number of the motors is at least two, the motors are connected by a second shaft, the second shaft is a soft shaft or a hard shaft.

[0007] A flexible shaft refers to a square shaft made of soft steel wire that can transmit power. In the process of transmitting power between the output shaft and the transmission part, the flexible shaft can produce a certain degree of bending deformation. Therefore, the flexible shaft has good tolerance adaptability and low requirements for installation accuracy, which can reduce the adjustment time during the installation process and improve installation efficiency. At the same time, it can also reduce the noise and vibration caused by rigid collision and improve comfort.

[0008] The driving part may include one motor, or may include two motors or more motors, and output shafts are respectively arranged at both ends of each motor. When the driving part includes at least two motors, the adjacent two motors are connected by a second shaft. The second shaft may be a flexible shaft or a rigid shaft.

[0009] Taking the driving part including two motors as an example, these two motors are connected by a second shaft to achieve series connection, and the two motors can have the same rotational speed. With such a setting, when the same driving power can be achieved, compared with setting a motor with a larger driving power, the overall volume can be effectively reduced, the requirement for the installation space can be reduced, and at the same time, the cost can be reduced, the flexibility is good, and the applicability is strong.

[0010] When the driving part includes three or more motors, each motor is connected in series through a second shaft in sequence. Specifically, the number of motors can be set according to the requirements of the actual driving power and the installation space.

[0011] Optionally, it further includes a bracket. The bracket is relatively fixed to the transmission part. The bracket is provided with two mounting seats, and both ends of the driving part are respectively mounted on the two mounting seats; the mounting seats are metal seats or plastic seats. When the mounting seats are metal seats, a buffer part is provided between the mounting seats and the driving part.

[0012] Optionally, the buffer part includes a buffer sleeve. The buffer sleeve can wrap around the outer end of the driving part in the circumferential direction. The mounting seat is provided with a mounting plate, the mounting plate is provided with a clamping hole, and a notch is provided at the edge of the clamping hole. The buffer sleeve can be clamped in the clamping hole.

[0013] Optionally, the upper part of the mounting plate is provided with an inclined section. The inclined sections of the mounting plates of the two mounting seats have opposite inclined directions, and the distance between the inclined sections of the two mounting plates gradually increases from bottom to top.

[0014] Optionally, the buffer part further includes an end cover arranged at the end of the buffer sleeve. In the installed state, the end cover can abut against the abutting surface of the mounting plate, and the abutting surfaces of the two mounting seats are arranged opposite or back to each other.

[0015] Optionally, the abutting surface or the side wall of the end cover facing the abutting surface is provided with an abutting protrusion.

[0016] Optionally, when the driving part includes at least two motors, the bracket is further provided with a support seat located between the adjacent two motors. The support seat is used to support the motor; the support seat is a metal seat or a plastic seat. When the support seat is a metal seat, a buffer member is provided between the support seat and the motor.

[0017] Optionally, mounting holes for mounting the motor are respectively provided at both ends of the support seat, and the support seat is fixed to the bracket through fasteners.

[0018] Optionally, the bracket includes a support plate and a connection end provided at an end of the support plate. The connection end is used to connect to the upper slide rail, the mounting seat is provided on the support plate, and flanging structures are respectively provided on two sides of the support plate in the length direction.

[0019] Optionally, the support plate is provided with a hollow hole, and the mounting seat is formed by bending the edge of the hollow hole;

[0020] and / or, the two ends of the support plate are bent upward to form the connection end.

[0021] Optionally, the driving mechanism further includes a mounting frame. The mounting frame is relatively fixed to the upper slide rail or the lower slide rail. The transmission part is fixedly provided on the mounting frame, and the connection end is fixed to the mounting frame.

[0022] This application also provides a seat slide rail, including at least one set of slide rail assemblies and the driving mechanism as described above.

[0023] The seat slide rail having the driving mechanism as above has technical effects similar to those of the above seat slide rail. For the sake of saving space, it will not be elaborated here.

[0024] Optionally, when the number of the slide rail assemblies is at least two groups, each group of the slide rail assemblies is arranged in parallel, driving parts are respectively provided between adjacent two groups of the slide rail assemblies, and the motors between adjacent two driving parts are connected by a second shaft. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the seat slide rail provided by an embodiment of this application;

[0026] Figure 2 is Figure 1 a partial enlarged view in

[0027] Figure 3 is Figure 1 a schematic structural diagram when the driving mechanism in

[0028] Figure 4 is Figure 3 an exploded view of

[0029] Figure 5 a schematic structural diagram of the bracket of the driving mechanism;

[0030] Figure 6 is Figure 5 an enlarged view of A in

[0031] Figure 7 a schematic structural diagram of the support seat of the driving mechanism;

[0032] Figure 8 It is a schematic structural diagram of the buffer part of the driving mechanism.

[0033] Appended Figures 1-8 In the figure, the reference numerals are explained as follows:

[0034] 10 Driving mechanism; 20 Slide rail assembly, 201 Upper slide rail, 202 Lower slide rail;

[0035] 1 Driving part, 11 Motor, 12 Second shaft;

[0036] 2 Bracket, 21 Mounting seat, 211 Mounting plate, 212 Card hole, 213 Notch, 214 Bending structure, 215 Guide surface, 216 Contact surface, 22 Support seat, 221 Support member, 222 Mounting hole, 223 Weight reduction hole, 224 Threaded part, 23 Support plate, 231 Flanging structure, 232 Hollow hole, 24 Connection end, 25 Fastener;

[0037] 3 Transmission part;

[0038] 4 First shaft;

[0039] 5 Buffer part, 51 Buffer sleeve, 511 Sleeve, 512 Fitting part, 52 End cover, 53 Contact protrusion;

[0040] 6 Mounting frame. Specific implementation mode

[0041] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0042] The embodiment of the present application provides a seat slide rail and a driving mechanism of the seat slide rail. Among them, as Figure 1 shown, the seat slide rail includes a driving mechanism 10 and a slide rail assembly 20. Two groups of slide rail assemblies 20 are arranged in parallel. Each group of slide rail assemblies 20 respectively includes an upper slide rail 201 and a lower slide rail 202. The upper slide rail 201 is connected to the seat pan, and the lower slide rail 202 is connected to the vehicle floor. The driving mechanism 10 can drive the upper slide rail 201 to slide relative to the lower slide rail 202, so as to adjust the position of the seat. The number of the slide rail assemblies 20 can be one group, or two groups, three groups or more groups. When the number of the slide rail assemblies 20 is at least two groups, the slide rail assemblies 20 are arranged in parallel.

[0043] As Figures 1-3 shown, the driving mechanism 10 includes a driving part 1 and a transmission part 3. Among them, the number of the transmission parts 3 is the same as the number of the slide rail assemblies 20 and they are arranged in one-to-one correspondence. The transmission part 3 can be relatively fixed to the upper slide rail 201 or relatively fixed to the lower slide rail 202.

[0044] The output shaft of the driving part 1 is connected to the transmission part 3 through the first shaft 4. The first shaft 4 is a flexible shaft. The transmission part 3 can convert the rotation of the first shaft 4 into a linear motion between the upper slide rail 201 and the lower slide rail 202, so that the upper slide rail 201 slides relative to the lower slide rail 202 and adjusts the position of the seat.

[0045] A flexible shaft refers to a square shaft made of flexible steel wires capable of transmitting power. During the process of transmitting power between the output shaft and the transmission part 3 through the flexible shaft, the flexible shaft can undergo a certain degree of bending deformation. Therefore, the flexible shaft has good tolerance adaptability and low requirements for installation accuracy, which can reduce the adjustment time during installation, improve the installation efficiency, and at the same time reduce the noise and vibration generated by rigid collisions and improve comfort.

[0046] In this embodiment, there is no limitation on the specific structure of the transmission part 3. For example, a worm and gear assembly, a rack and pinion assembly, a lead screw assembly, etc. can be arranged inside the transmission part 3 to convert the rotation of the first shaft 4 into a linear motion between the upper slide rail 201 and the lower slide rail 202. Specifically, how to convert rotation into linear motion through a worm and gear assembly, a rack and pinion assembly, and a lead screw assembly is well-known prior art to those skilled in the art. To save space, it will not be elaborated here. A gear assembly can also be arranged inside the transmission part 3 to achieve the functions of power transmission and speed reduction.

[0047] In this embodiment, the driving part 1 can include one motor 11, or two motors 11 or more motors 11 are also acceptable, and output shafts are respectively arranged at both ends of each motor 11. When the driving part 1 includes at least two motors 11, adjacent two motors 11 are connected through the second shaft 12.

[0048] Such as Figure 3 and Figure 4 As shown, taking the driving part 1 including two motors 11 as an example, these two motors 11 are connected through the second shaft 12 to achieve series connection, and the two motors 11 can have the same rotational speed. In this way, when the same driving power can be achieved, compared with setting one motor 11 with a larger driving power, it can effectively reduce the overall volume, reduce the requirements for the installation space, and at the same time can reduce costs, have good flexibility, and strong applicability.

[0049] When the driving part 1 includes three or more motors 11, each motor 11 is connected in series through the second shaft 12 in sequence. Specifically, the number of motors 11 can be set according to the requirements of the actual driving power and installation space.

[0050] The second shaft 12 can be a flexible shaft or a rigid shaft, and there is no specific limitation here. Among them, a rigid shaft refers to a steel square shaft capable of transmitting power and cannot deform during the process of transmitting power.

[0051] The driving mechanism 10 further includes a bracket 2 for mounting the driving part 1. The bracket 2 is relatively fixed to the transmission part 3. The bracket 2 is provided with two mounting seats 21, and both ends of the driving part 1 are respectively mounted on the two mounting seats 21.

[0052] When the number of the slide rail assemblies 20 is at least two groups, the driving part 1 and the bracket 2 are respectively arranged between adjacent two groups of slide rail assemblies 20. Both ends of the bracket 2 are relatively fixed to the mounting parts 3 on both sides respectively. Output shafts are respectively arranged at both ends of the driving part 1, and the output shafts at both ends of the driving part 1 are respectively connected to the corresponding transmission parts 3 through the first shafts 4. And the motors 11 of adjacent two driving parts 1 are also connected through the second shaft 12. That is to say, the motors 11 of all the driving parts 1 are sequentially connected through the second shaft 12 to realize the series arrangement of all the motors 11, further reducing the overall volume, reducing the cost and improving the flexibility.

[0053] The mounting seat 21 can be a metal seat or a plastic seat. When the mounting seat is a metal seat, a buffer part 5 is further arranged between the mounting seat 21 and the driving part 1. The buffer part 5 can be a plastic part or a rubber part.

[0054] During the driving process of the driving part 1, vibration may be generated. There are two transmission paths for the vibration: one transmission path is that the vibration of the driving part 1 is absorbed by the buffer part 5 and then transmitted to the upper slide rail 201 through the bracket 2. The other transmission path is that the vibration of the driving part 1 is absorbed by the first shaft 4 and then transmitted to the slide rail assembly 20 through the transmission part 3. Since both the first shaft 4 and the buffer part 5 have good vibration damping effects, therefore, the vibration of the driving part 1 is attenuated by the vibration absorption components in the above two transmission paths and then transmitted to the slide rail assembly 20, without affecting the sliding of the upper slide rail 201, avoiding large vibration and noise during the process of adjusting the position of the seat and improving the user experience.

[0055] As Figure 8 shown, the buffer part 5 includes a buffer sleeve 51, and the buffer sleeve 51 can wrap around the outer end of the driving part 1 along the circumferential direction. As Figure 6 shown, the mounting seat 21 is provided with a mounting plate 211, the mounting plate 211 is provided with a clamping hole 212, and a notch 213 is arranged at the edge of the clamping hole 212. The buffer sleeve 51 can be clamped in the clamping hole 212 to realize the fixation between the buffer sleeve 51 and the mounting seat 21.

[0056] It is not difficult to understand that the structure of the buffer sleeve 51 is adapted to the structure of the end of the driving part 1. After the end of the driving part 1 is mounted in the buffer sleeve 51, the buffer sleeve 51 is then mounted in the clamping hole 212. And after the buffer sleeve 51 is mounted in the clamping hole 212, the notch 213 is slightly deformed to ensure the mounting stability between the buffer sleeve 51 and the mounting seat 21.

[0057] The provision of the card hole 212 facilitates the installation between the buffer sleeve 51 and the mounting seat 21, and at the same time, it also facilitates the mounting seat 21 to clamp the buffer sleeve 51.

[0058] Specifically, the end of the driving part 1 includes a cylindrical part and a limiting part. Among them, the first shaft 4 passes through the cylindrical part and is in transmission connection with the output shaft. The limiting part is used to limit the rotation of the driving part 1. As Figure 8 shown, the buffer sleeve 51 includes a sleeve 511 and a mating part 512. The sleeve 511 is wrapped outside the cylindrical part, and the limiting part is located inside the mating part 512. Similarly, the side wall of the card hole 212 is also provided with a mating structure provided with the mating part 512. By cooperating the mating structure with the limiting part, the rotation of the driving part 1 can be prevented. Of course, the specific structure of the buffer sleeve 51 can be set according to the structure of the end of the driving part 1, and no specific limitation is made here.

[0059] The top of the mounting plate 211 inclines away from the other mounting seat 21, and an inclined section 214 is formed in the upper part of the mounting plate 211. The inclined directions of the inclined sections 214 of the mounting plates 211 of the two mounting seats 21 are opposite, so that the distance between the two inclined sections 214 gradually increases from bottom to top. The opposite side walls of the two inclined sections 214 respectively form guiding surfaces 215 to facilitate the guiding of the installation of the driving part 1.

[0060] During installation, after the end of the driving part 1 is installed with the buffer part 5, when the whole is installed downward onto the bracket 2, the buffer part 5 can slide downward along the guiding surface 215 into the card hole 212, and the installation is relatively convenient.

[0061] As Figure 8 shown, the buffer part 5 further includes an end cap 52 provided at the end of the buffer sleeve 51. In the installed state, the end cap 52 can abut against the abutting surface 216 of the mounting plate 211. The orientations of the abutting surfaces 216 of the mounting plates 211 of the two mounting seats 21 are opposite, that is to say, the abutting surfaces 216 of the two mounting seats 21 are arranged oppositely or back to back. In this way, when the buffer parts 5 at both ends of the driving part 1 abut against the corresponding abutting surfaces 216 of the mounting plates 211 through the end caps 52 respectively, the installation stability of the driving part 1 and the bracket 2 can be maintained in the axial direction.

[0062] As Figure 8 shown, the end cap 52 is further provided with an abutting protrusion 53 on the side wall facing the abutting surface 216. When the end cap 52 abuts against the abutting surface 216, the abutting protrusion 53 can abut against the abutting surface 216. In this way, while ensuring the abutting force, the abutting area can be reduced, which is convenient for disassembly and assembly operations.

[0063] Of course, it is also possible that the abutting surface 216 is provided with abutting protrusions 53, and the abutting protrusions 53 can abut against the end cover 52. Whether the abutting protrusions 53 are provided on the end cover 52 or on the abutting surface 216, the number of the abutting protrusions 53 is at least three, and the abutting protrusions 53 are not collinear to ensure the abutting stability.

[0064] When the driving part 1 includes at least two motors 11, the bracket 2 is further provided with a support seat 22. The support seat 22 is arranged between the two motors 11 and is used to support the ends of the two motors 11 on the side close to each other to ensure the stability of the driving part 1 installed on the bracket 2.

[0065] The support seat 22 can be a metal seat or a plastic seat. When the support seat 22 is a metal seat, a buffer member can also be arranged between the support seat 22 and the motor 11. The arrangement of the buffer member can provide a buffering effect at the connection between the motor 11 and the support seat 22 to prevent the vibration of the motor 11 from being transmitted to the bracket 2 and then from the bracket 2 to the transmission part 3 and the slide rail assembly 20, thereby reducing noise and improving comfort. The buffer member can be a rubber member or a plastic member, and the specific structure can be the same as or different from the structure of the buffer part 5.

[0066] The support seat 22 includes two support members 221. Each support member 221 is respectively used to support the end of one motor 11. The support member 221 is provided with an installation hole 222 for installing the end of the motor 11, and the support seat 22 and the bracket 2 can be fixed by a fastener 25.

[0067] Taking the installation seat 21 as a metal seat, the support seat 22 as a plastic seat, and the driving part 1 including two motors 11 as an example, during installation, first insert the ends of the motors 11 into the installation holes 222 of the support part 22, connect the two motors 11 through the second shaft 4, then install the buffer parts 5 at the ends of the two motors 11 away from the support seat 22 respectively, and then install the driving part 1 and each support part 22 as a whole onto the bracket 2, so that the buffer parts 5 at both ends of the driving part 1 are installed into the clamping holes 212 of the installation seat 21, and the support seat 22 abuts against the surface of the bracket 2. Finally, fix the support seat 22 and the bracket 2 through the fastener 25.

[0068] Installing the driving part 1 and each support seat 22 as a whole onto the bracket 2 can simplify the installation operation and improve the installation efficiency.

[0069] In this embodiment, the end of the motor 11 can be fixed to the installation hole 222 by interference fit or by means of fasteners or the like. And the support seat 22 and the bracket 2 can also be fixed by welding. When fixed by the fastener 25, the disassembly and assembly operation can be simplified.

[0070] The structure of the support base 22 is as Figure 7 shown. The support base 22 is also provided with a weight-reducing hole 223 to achieve light weight. The support base 22 is also provided with a threaded portion 224. The threaded portion 224 is provided with a threaded hole. Specifically, the threaded portion 224 can be machined or formed by a fixing nut. During installation, the fastener 25 (specifically a bolt) passes through the bracket 2 and cooperates with the threaded portion 224 to fix the support base 22 and the bracket 2.

[0071] Of course, the structure of the support base 22 can also be the same as that of the mounting base 21. At this time, the number of mounting bases 21 is twice the number of motors 11. When a support base 22 is provided between two motors 11 and the two support members 221 of the support base 22 provide support for the two motors 11, the overall structure can be simplified.

[0072] As Figure 2 shown, the drive mechanism 10 further includes a mounting bracket 6 fixed to the upper slide rail 201. The transmission portion 3 is fixed to the mounting bracket 6. And as Figure 5 shown, the two ends of the bracket 2 are respectively provided with connecting ends 24 by bending. The connecting ends 24 and the mounting bracket 6 can be fixed by bolts, interference fit, etc.

[0073] It can also be that the transmission portion 3 and the bracket 2 are directly fixed to the upper slide rail 201 respectively. When a mounting bracket 6 fixed to the upper slide rail 201 is provided, the structure of the mounting bracket 6 can be set according to the structures of the transmission portion 3 and the bracket 2, with good flexibility and convenient installation operation.

[0074] Of course, the mounting bracket 6 can also be fixed to the lower slide rail 202, or the mounting bracket 6 can also be fixed to the vehicle floor.

[0075] As Figure 5 shown, the bracket 2 includes a support plate 23 and a connecting end 24 provided at the end of the support plate 23. Among them, the connecting end 24 is used to connect to the upper slide rail 201, specifically to connect to the mounting bracket 6. The mounting base 21 and the support base 22 are both provided on the support plate 23. Flanging structures 231 are provided on both sides of the support plate 23 along the length direction. The flanging structures 231 can increase the structural strength of the support plate 23 and ensure the support stability. Of course, the structural strength of the support plate 23 can also be improved by setting reinforcing ribs. By using the flanging structures 231 to achieve structural strengthening, the overall structure can be simplified and the installation process can be simplified.

[0076] The support plate 23 is also provided with a hollow hole 232 to achieve the purpose of weight reduction. Moreover, to simplify the overall structure and manufacturing process of the bracket 2, the mounting plate 211 of the mounting seat 21 can also be formed by bending upward along the edge of the hollow hole 232. That is to say, through stamping, a part of the plate body of the support plate 23 is separated. This part of the plate body is not completely separated from the support plate 23, but is connected to the support plate 23 on one side. Then, this part of the plate body is bent upward, and the mounting plate 211 of the mounting seat 21 is formed through processing. And a hollow hole 232 is formed at the position of the support plate 23 corresponding to this part of the plate body. Of course, the mounting seat 21 and the bracket 2 can also be set as independent structures and fixed by means of bolt connection, welding, etc.

[0077] The connection end 24 can also be formed by bending upward the end of the support plate 23 to simplify the overall structure of the bracket 2. The bracket 2 is arranged at the bottom of the motor 11 and can provide protection for the motor 11 from below to prevent foreign objects from colliding with the motor 11. The height of the connection end 24 is higher than that of the support plate 23, which is convenient for fixing the connection end 24 to the mounting frame 6. At the same time, it can ensure that the output shaft of the motor 11, the first shaft 4, and the power interface of the transmission part 3 (the interface for connecting with the first shaft 4) are approximately at the same height. Of course, it is best that the output shaft, the first shaft 4, and the power interface are collinear. However, due to the setting of the first shaft 4, the flexibility can be improved.

[0078] Of course, the bracket 2 can also be made of plastic. At this time, each component (including the mounting seat 21, the support seat 22, the support plate 23, the connection end 24, the strengthening structure, etc.) can be an integrally formed structure. To ensure the structural strength of the bracket 2, a metal skeleton can also be embedded in each component.

[0079] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A driving mechanism for a seat slide rail, the seat slide rail comprising at least one set of slide rail assemblies (20), the slide rail assemblies (20) comprising an upper slide rail (201) and a lower slide rail (202), the driving mechanism being used for driving the upper slide rail (201) to slide relative to the lower slide rail (202), characterized in that, The driving mechanism includes a driving part (1) and a transmission part (3) provided in one-to-one correspondence with each of the slide rail assemblies (20). The transmission part (3) is relatively fixed to the upper slide rail (201) or the lower slide rail (202). The driving part (1) is in transmission connection with the transmission part (3) through a first shaft (4). The transmission part (3) can convert the rotation of the first shaft (4) into a linear motion between the upper slide rail (201) and the lower slide rail (202). The first shaft (4) is a flexible shaft. The driving part (1) includes at least one motor (11). When the number of the motors (11) is at least two, the motors (11) are connected by a second shaft (12). The second shaft (12) is a flexible shaft or a rigid shaft. It further includes a bracket (2). The bracket (2) is relatively fixed to the transmission part (3). The bracket (2) is provided with two mounting seats (21). Two ends of the driving part (1) are respectively mounted on the two mounting seats (21). The mounting seat (21) is a metal seat or a plastic seat. When the mounting seat (21) is a metal seat, a buffer part (5) is provided between the mounting seat (21) and the driving part (1). The buffer part (5) includes a buffer sleeve (51). The buffer sleeve (51) can wrap around the outer end of the driving part (1) in the circumferential direction. The mounting seat (21) is provided with a mounting plate (211). The mounting plate (211) is provided with a clamping hole (212). A notch (213) is provided at the edge of the clamping hole (212). The buffer sleeve (51) can be clamped in the clamping hole (212).

2. The drive mechanism of the seat slide rail according to claim 1, characterized in that, The upper part of the mounting plate (211) is provided with an inclined section (214). The inclined directions of the inclined sections (214) of the mounting plates (211) of the two mounting seats (21) are opposite. The distance between the inclined sections (214) of the two mounting plates (211) gradually increases from bottom to top.

3. The drive mechanism of the seat slide rail according to claim 1 or 2, characterized in that, The buffer part (5) further includes an end cover (52) provided at the end of the buffer sleeve (51). In the installed state, the end cover (52) can abut against the abutting surface (216) of the mounting plate (211). The abutting surfaces (216) of the two mounting seats (21) are arranged relatively or oppositely.

4. The drive mechanism of the seat slide rail according to claim 3, characterized in that, The abutting surface (216) or a side wall of the end cover (52) facing the abutting surface (216) is provided with an abutting protrusion (53).

5. The drive mechanism of the seat slide rail according to claim 1 or 2, characterized in that, When the driving part (1) includes at least two motors (11), the bracket (2) is further provided with a support seat (22) located between two adjacent motors (11). The support seat (22) is used to support the motor (11). The support seat (22) is a metal seat or a plastic seat. When the support seat (22) is a metal seat, a buffer is provided between the support seat (22) and the motor (11).

6. The drive mechanism of the seat slide rail according to claim 5, characterized in that, Both ends of the support seat (22) are respectively provided with mounting holes (222) for mounting the motor (11). And the support seat (22) is fixed to the bracket (2) through a fastener (25).

7. The drive mechanism of the seat slide rail according to claim 1 or 2, characterized in that, The bracket (2) includes a support plate (23) and a connection end (24) provided at the end of the support plate (23). The connection end (24) is used to connect with the upper slide rail (201). The mounting seat (21) is provided on the support plate (23). Flanging structures (231) are respectively provided on both sides of the support plate (23) in the length direction.

8. The drive mechanism of the seat slide rail according to claim 7, characterized in that, The support plate (23) is provided with a hollow hole (232), and the edge of the hollow hole (232) forms the mounting seat (21) through bending. And / or, both ends of the support plate (23) form the connection end (24) through upward bending.

9. The drive mechanism of the seat slide rail according to claim 7, characterized in that, The driving mechanism further includes a mounting frame (6). The mounting frame (6) is relatively fixed to the upper slide rail (201) or the lower slide rail (202). The transmission part (3) is fixedly provided on the mounting frame (6). The connection end (24) is fixed to the mounting frame (6).

10. A seat slide rail, characterized in that, It includes at least one set of slide rail assemblies (20) and the driving mechanism according to any one of claims 1-9.

11. The seat slide rail according to claim 10, characterized in that, When the number of the slide rail assemblies (20) is at least two groups, each group of the slide rail assemblies (20) is arranged in parallel. Driving parts (1) are respectively provided between adjacent two groups of the slide rail assemblies (20). Motors (11) of adjacent two driving parts (1) are connected through a second shaft (12).

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