A slide rail transmission device and a vehicle

Abstract

This application discloses a slide rail transmission device and vehicle, including a drive unit and at least one slide rail assembly. The slide rail assembly includes a track and a moving member. The track has a downwardly extending flange forming a first transmission toothed belt. A damping strip is provided at the position of the first transmission toothed belt, forming a second transmission toothed belt. The first and second transmission toothed belts are arranged side-by-side. The moving member has a transmission gear located below the first and second transmission toothed belts, and the transmission gear can simultaneously mesh with both the first and second transmission toothed belts. The drive unit drives the transmission gear to rotate, thereby moving the moving member along the track. This arrangement facilitates stable driving and prevents foreign objects from easily falling into the first and second transmission toothed belts. The side-by-side arrangement of the first and second transmission toothed belts, meshing together with the transmission gear, ensures the overall strength of the transmission toothed belts, achieves vibration damping, and enhances tolerance adaptability.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a slide rail transmission device and a vehicle. Background Technology

[0002] Car seats can be moved via sliding rails to meet different space requirements. For example, as people's demands for passenger vehicle comfort and space continue to increase, MPV models are gradually gaining popularity, and more and more models are equipped with long sliding rails to meet the fore-and-aft sliding requirements of the second and third rows of seats, freeing up more space. Therefore, a reliable sliding rail transmission device is needed to realize the fore-and-aft adjustment of the seats. Summary of the Invention

[0003] This application provides a slide rail transmission device, including a drive unit and at least one slide rail assembly. The slide rail assembly includes a track and a moving member. The track has a downwardly extending flange, which forms a first transmission toothed belt. The track has a damping strip at the position of the first transmission toothed belt, which forms a second transmission toothed belt. The first and second transmission toothed belts are arranged side by side. The moving member has a transmission gear located below the first and second transmission toothed belts and is capable of simultaneously meshing with both the first and second transmission toothed belts. The drive unit drives the transmission gear to rotate, thereby moving the moving member along the track.

[0004] In one specific embodiment, the track has a downwardly extending flange, and the first transmission toothed belt is integrally formed on the flange.

[0005] In one specific embodiment, the track is provided with a groove having a bottom wall and side walls located on both sides of the bottom wall, and the top of at least one of the side walls extends inward and downward to form the flange.

[0006] In one specific embodiment, the movable element is at least partially inserted into the groove and moves along the bottom wall of the groove.

[0007] In one specific embodiment, the second transmission toothed belt is located inside the flange.

[0008] In one specific embodiment, the second transmission toothed belt is a plastic component.

[0009] In one specific embodiment, rolling bearings are provided on one or both sides of the moving part, the moving part is supported on the track by the rolling bearings, and the moving part moves relative to the track by rolling the rolling bearings.

[0010] In one specific embodiment, the track is further provided with clearance-eliminating bearings on both sides. The clearance-eliminating bearings contact the track, and the contact position is located above the rolling element support position. The clearance-eliminating bearings are inclined in the vertical direction, and the clearance-eliminating bearings on both sides are symmetrically arranged in the vertical direction. The track is provided with a groove, the groove having a bottom wall and side walls located on both sides of the bottom wall. The top of the side wall extends inward to form a top wall, and the top wall and the side wall are connected by an arc surface. The clearance-eliminating bearings contact the arc surface and can roll along the arc surface.

[0011] In one specific embodiment, the slide rail transmission device includes two sets of slide rail assemblies arranged side by side. The moving part of each slide rail assembly includes a gearbox. The gearbox includes an input gear and an output gear. The output gear and the transmission gear are coaxially connected. The input gear has a first shaft hole.

[0012] The drive unit includes a motor and a transmission rod. The motor drives the transmission rod to rotate. The transmission rod is simultaneously inserted into the first shaft hole of the input gear of the two gearboxes, causing the two input gears to rotate synchronously.

[0013] In one specific embodiment, the output gear is provided with a gear shaft that extends out of the housing of the gearbox, and the transmission gear has a second shaft hole into which the gear shaft is inserted and circumferentially restricted to rotate; it also includes an axial limiting member, which extends out of the second shaft hole and is connected to the axial limiting member, and the axial limiting member restricts the transmission gear from axially disengaging from the gear shaft.

[0014] In one specific embodiment, a bracket is also included, which connects the moving parts of the two sets of slide rail assemblies, and the motor is mounted on the bracket.

[0015] In one specific embodiment, the movable member has a receiving portion, a portion of the gearbox is located within the receiving portion and a portion extends upward from the movable member, the second shaft hole of the input gear is located above the movable member, and the two ends of the transmission rod are respectively inserted into the two second shaft holes.

[0016] This application also provides a vehicle, including a seat and the slide rail transmission device described in any of the above claims, wherein the moving part is connected to the seat.

[0017] In this embodiment, the movement and engagement of the track and the moving parts, as well as the driving method of the transmission gear with the first and second transmission toothed belts, facilitate stable driving, especially under long-distance stroke adjustment. Furthermore, the transmission gear is located below the first and second transmission toothed belts. This arrangement prevents foreign objects from easily falling into the first and second transmission toothed belts, thus improving or even preventing them from affecting the meshing of the transmission gear and the first and second transmission toothed belts, ensuring driving performance. Most importantly, the first transmission toothed belt and the second transmission toothed belt, which acts as a vibration damper, are arranged side-by-side and mesh with the transmission gear together. This ensures the overall strength of the transmission toothed belts, achieves vibration damping, and facilitates improved tolerance adaptation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the slide rail transmission device provided in the embodiments of this application;

[0019] Figure 2 for Figure 1 An exploded view of the moving component, which is equipped with a gearbox;

[0020] Figure 3 for Figure 2 Schematic diagram of the intermediate gearbox;

[0021] Figure 4 for Figure 3 Sectional view of the intermediate gearbox along line AA;

[0022] Figure 5 for Figure 1 Sectional view along the BB direction;

[0023] Figure 6 for Figure 1 A partially enlarged view of the engagement position between the intermediate transmission gear and the first transmission belt;

[0024] Figure 7 for Figure 6 A diagram from another perspective.

[0025] Figure 1-7 The annotations in the attached figures are explained as follows:

[0026] 1-Slide rail assembly;

[0027] 11-Moving component; 111-Rolling bearing; 112-Fixed plate; 113-Clearing bearing;

[0028] 12-Rail; 12a-Sidewall; 12b-Flange; 12c-Bottomwall; 12d-Groove; 121-First transmission toothed belt; 121a-Gear tooth; 122-Damping strip; 1221-Second transmission toothed belt; 1221a-Gear tooth; 1222-Fastener;

[0029] 2-Motor;

[0030] 3-Gearbox; 31-First housing assembly; 311-First housing; 312-First bushing; 313-Second bushing; 314-Third bushing; 32-Second housing assembly; 322-Fourth bushing; 33-Input gear; 33a-Boss; 33b-Irregular hole; 34-Intermediate gear; 34a-Boss; 35-Output gear; 35a-Boss; 35b-Boss; 35c-Irregular section; 35d-Threaded section; 36-Transmission gear; 36a-Irregular hole; 37-Axial limiting component; 38-Screw; 39-Pin;

[0031] 4-Staff;

[0032] 5-Limit spring clip;

[0033] 6-Drive rod;

[0034] 7- Screw;

[0035] 8-Gasket;

[0036] 9- Bolt;

[0037] 10-Nuts. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the slide rail transmission device provided in an embodiment of this application.

[0040] The slide rail transmission device in this embodiment includes a drive unit and at least one slide rail assembly 1. Figure 1 The system includes two slide rail assemblies 1 arranged side by side: a slide rail assembly 1 on the left and a slide rail assembly 1 on the right. Each slide rail assembly 1 includes a track 12 and a moving member 11, which can move along the track 12. The extension direction of the track 12 and the movement direction of the moving member 11 are as follows: Figure 1 The front-back direction, left-right direction and front-back direction are perpendicular, and the front-back direction, left-right direction and Figure 1 The vertical direction shown is perpendicular. Figure 1The vertical direction is the same as the up-down direction. Obviously, when the sliding rail transmission device changes its placement angle, the vertical direction may not be vertical. Figure 1 The perspective shown is also the perspective of the slide rail transmission device under normal operating conditions.

[0041] In addition, the track 12 is provided with a first transmission toothed belt 121 and a second transmission toothed belt 1221 formed by damping strips 122. The first transmission toothed belt 121 and the second transmission toothed belt 1221 are arranged side by side. The moving member 11 is provided with a transmission gear 36, which is located below the first transmission toothed belt 121 and the second transmission toothed belt 1221, and the transmission gear 36 meshes with both the first transmission toothed belt 121 and the second transmission toothed belt 1221. The driving unit can drive the transmission gear 36 to rotate. The rotation of the transmission gear 36 can move relative to the first transmission toothed belt 121 and the second transmission toothed belt 1221 in the front-back direction, thereby driving the moving member 11 to move along the track 12.

[0042] Specifically, such as Figure 2-6 As shown, Figure 2 for Figure 1 An exploded view of the moving part 11, which is equipped with a gearbox 3; Figure 3 for Figure 2 Explosion diagram of the middle gearbox 3; Figure 4 for Figure 3 Sectional view of gearbox 3 along line AA; Figure 5 for Figure 1 Sectional view along the BB direction; Figure 6 for Figure 1 A partial enlarged view of the engagement position of the central transmission gear 36, the first transmission toothed belt 121, and the second transmission toothed belt 1221; Figure 7 for Figure 6 A diagram from another perspective.

[0043] like Figure 1 As shown, track 12 is provided along its length direction (i.e. Figure 1The groove 12d extends in the front-to-back direction (as shown), with its opening facing upwards. The track 12 can be formed by directly bending a sheet metal to create the groove 12d. The groove 12d includes a bottom wall 12c and side walls 12a located on both sides of the bottom wall 12c. The top of the side walls 12a extends inwards and downwards to form a flange 12b. Here, "inwards" means towards the center of the groove 12d. The side walls 12a first extend inwards to form a top wall, and then the top wall extends downwards to form the flange 12b. Thus, the track 12 has flanges 12b arranged along its length. Gear teeth 121a are machined on the lower edge of the flanges 12b, thus forming the required first transmission toothed belt 121. It can be understood that the length of the flanges 12b or the first transmission toothed belt 121 can be equal to or shorter than the length of the track 12, and can be designed according to factors such as drive stroke and ease of processing. Figure 1 In the middle, the flange 12b is formed by direct bending and is set to the same length as the track 12.

[0044] In addition, the teeth 121a of the first transmission belt 121 can be processed after the flange 12b is formed, or they can be pre-processed on the edge of the plate and then bent to form a track 12 with a groove 12d. The teeth 121a are automatically positioned in the inner flange 12b inside the groove 12d.

[0045] This forms the first transmission toothed belt 121. The first transmission toothed belt 121 is machined during the fabrication of the track 12, eliminating the need for separate assembly with the track 12. This results in a simple structure and, being an integral part of the track 12, is more reliable. During its engagement with the transmission gear 36, it is less prone to displacement, ensuring drive stability. However, it is also possible to separate the first transmission toothed belt 121 from the track 12 and then fix it to the track 12.

[0046] In addition, in this embodiment of the application, the track 12 is provided with a damping strip 122 at the position of the first transmission toothed belt 121 to absorb the vibration caused by the meshing transmission of the transmission gear 36 and the first transmission toothed belt 121. The damping strip 122 can be made of plastic to meet the function of vibration reduction.

[0047] Please continue to refer to this. Figure 5-7 Specifically, in this embodiment, the damping strip 122 is disposed on the side of the flange 12b facing the corresponding sidewall 12a, which can be defined as the first side, and the other side as the second side. Figure 1 As shown, in this embodiment, the track 12 has a groove 12d. The moving member 11 is inserted into the groove 12d to move along the groove 12d. The second side of the flange 12b faces the moving member 11, and the first side faces away from the moving member. Setting the damping strip 122 on the first side facilitates fixing the damping strip 122 and makes it less susceptible to interference from the moving member. For example... Figure 5 , 6As shown, the damping strip 122 can be fixed to the top wall position extending inward from the side wall 12a by fastener 1222. The fastener 1222 and the damping strip 122 can be an integral structure. For example, the damping strip 122 can be provided with a protrusion inserted into the top wall and then riveted to form the fastener 1222. Of course, the fastener 1222 can also be a fastening screw, etc. The damping strip 122 can also be fixed to the track 12 in other ways, or fixed to other positions of the track 12.

[0048] In this embodiment, the cross section of the damping strip 122 along the direction perpendicular to the extension of the track 12 is approximately inverted L-shaped. The horizontal part is used to fix the top wall extending inward from the side wall 12a, and the vertical part forms a second transmission toothed belt 1221. The lower edge of the second transmission toothed belt 1221 is machined to form gear teeth 1221a.

[0049] like Figure 6 As shown, in this embodiment, the teeth 121a of the first transmission belt 121 and the teeth 1221a of the second transmission belt 1221 are both arranged downwards, and the transmission gear 36 is located below the first transmission belt 121 and the second transmission belt 1221. With this arrangement, foreign objects are less likely to fall into the first transmission belt 121 and the second transmission belt 1221, thereby improving or even preventing foreign objects from falling into the first transmission belt 121 and the second transmission belt 1221 and affecting the meshing of the transmission gear 36 with the first transmission belt 121 and the second transmission belt 1221, thus ensuring the driving effect.

[0050] It should be noted that in this embodiment, the first transmission toothed belt 121 and the second transmission toothed belt 1221 are arranged side by side and simultaneously mesh with the transmission gear 36, such as... Figure 5 As shown, the width of the first transmission toothed belt 121 and the second transmission toothed belt 1221 along the direction perpendicular to the track 12 is approximately equal to the axial length of the transmission gear 36. This means that the first transmission toothed belt 121 and the second transmission toothed belt 1221 together form a rack that meshes with the transmission gear 36. Clearly, the teeth 121a of the first transmission toothed belt 121 and the teeth 1221a of the second transmission toothed belt 1221 are of equal size, and their widths along the direction perpendicular to the track 12 are approximately equal to the axial lengths of the transmission gear 36. Figure 5 The projections in the left-right direction (perpendicular to track 12) shown generally overlap. In this way, the first transmission toothed belt 121 and the second transmission toothed belt 1221, which serves as a vibration damper, are arranged side by side and mesh together with the transmission gear 36. This ensures the overall strength of the transmission toothed belt, achieves the purpose of vibration damping, and is also conducive to enhancing tolerance adaptation.

[0051] Please continue to refer to this. Figure 5The movable component 11 is also provided with a rolling element. The movable component 11 is supported on the track 12 by the rolling element, that is, the main structure of the movable component 11 is located on the rolling element and supported by the rolling element. The movable component 11 moves relative to the track 12 by the rolling of the rolling element. As mentioned above, the transmission gear 36 is located below the first transmission toothed belt 121 and the second transmission toothed belt 1221. The transmission gear 36 transmits the driving force for the movement of the movable component 11, while the rolling element can improve the smoothness of the movement of the movable component 11 along the track 12 under the action of the driving force. The rolling element can be a rolling bearing 111. As shown in Figure 5, rolling bearings 111 are provided on both sides of the movable component 11, and the two rolling bearings 111 are respectively supported on both sides of the bottom wall 12c of the groove 12d.

[0052] Two rolling bearings 111 make the movement of the moving part 11 more stable, but it is known that one rolling bearing 111 can also be used. In addition, the rolling part is not limited to the rolling bearing 111; for example, it can also be a roller. Of course, the rolling bearing 111 has better operational stability. Furthermore, it is also possible not to use rolling parts. For example, the bottom of the moving part 11 can move directly along the bottom wall 12c of the groove 12d of the track 12 under the drive of the transmission gear 36 and the first transmission toothed belt 121 and the second transmission toothed belt 1221. Alternatively, a structure such as ball bearings can be provided on the bottom wall 12c of the track 12 to facilitate the movement of the moving part 11. These are all solutions that can realize the movement of the moving part 11 relative to the track 12. This embodiment does not impose specific restrictions on the specific structure that facilitates the relative movement of the moving part 11 and the track 12.

[0053] In addition, such as Figure 1 , 5 As shown, the movable component 11 in this embodiment is further provided with a backlash-free bearing 113. The backlash-free bearing 113 contacts the track 12, and the contact position is located above the support position of the rolling element on the track 12. That is, the backlash-free bearing 113 does not support the movable component 11 from below. The backlash-free bearing 113 is inclined relative to the vertical direction, and backlash-free bearings 113 are provided on both sides of the movable component 11. The backlash-free bearings 113 on both sides are symmetrically arranged with respect to the vertical central axis of the movable component 11. This can eliminate the gap between the movable component 11 and the track 12 in the left-right direction and the vertical direction, so as to ensure that after the movable component 11 and the track 12 are assembled, the transmission gear 36 and the first transmission toothed belt 121 and the second transmission toothed belt 1221 can reliably mesh and run smoothly without shaking.

[0054] Figure 5The sidewall 12a and top wall of the middle track 12 have an arc-shaped transition. The tops of the clearance-free bearings 113 on both sides of the moving part 11 contact the corresponding arc-shaped positions, allowing them to roll along the arc. The clearance-free bearings 113 on both sides are distributed in an inverted V-shape. The arc-shaped positions of the top corners of the track 12 facilitate the positioning of the clearance-free bearings 113. The contact surface between the clearance-free bearings 113 and the track 12 can also be an arc-shaped surface. In this case, the arc-shaped surface of the clearance-free bearings 113 can be well tangent to the contact surface of the track 12 and can always maintain a single point of tangency, ensuring the adaptability of manufacturing tolerances and improving the smoothness of sliding.

[0055] Referring again to 3-5, the movable component 11 in this embodiment also includes a gearbox 3, and the aforementioned transmission gear 36 is disposed in the gearbox 3. The gearbox 3 specifically includes a housing, which is formed by assembling a first housing assembly 31 and a second housing assembly 32. The first housing assembly 31 and the second housing assembly 32 can be fixedly connected by screws 38 and pins 39. The gearbox 3 contains an input gear 33, an intermediate gear 34, and an output gear 35. The transmission gear 36 is disposed outside the housing, and the output gear 35 and the transmission gear 36 are coaxially connected inside the housing, meaning that the transmission gear 36 can rotate synchronously with the output gear 35. Figure 4 As shown, housing assembly 31 includes a first housing 311, and second housing assembly 32 includes a second housing 321. Both housing assemblies also include bushings corresponding to each gear. The first housing 311 and the second housing 321 include holes for mounting the bushings.

[0056] In this embodiment, the bushings specifically include two first bushings 312, two second bushings 313, a third bushing 314, and a fourth bushing 322. All bushings can be self-lubricating bearings. The input gear 33 has bosses 33a on both sides, which are fitted onto the two first bushings 312. The intermediate gear 34 has bosses 34a on both sides, which are fitted onto the two second bushings 313. The output gear 35 has bosses 35a and 35b on both sides, which are fitted onto the third bushing 314 and the fourth bushing 322 respectively. The side of the output gear 35 with bosses 35b needs to be connected to the transmission gear 36, such as... Figure 4 As shown, the axial thickness of the radial flange of the fourth bushing 322 can be greater than that of the third bushing 314 to improve strength. All of these bushings can serve to reduce noise and lubricate when mating with the gear shaft.

[0057] The aforementioned input gear 33 has a first shaft hole 33b, and the drive unit includes a motor 2 and a transmission rod 6. The motor 2 drives the transmission rod 6 to rotate. The transmission rod 6 is simultaneously inserted into the two gearboxes 3 of the two slide rail assemblies 1, specifically into the first shaft hole 33b of the input gear 33 in the gearbox 3, so as to drive the two input gears 33 to rotate synchronously. The first shaft hole 33b can be an irregularly shaped hole, and the motor 2 also has an irregularly shaped hole. The transmission rod 6 can be set as an irregularly shaped shaft, that is, its cross-section is irregular. This can prevent the transmission rod 6 from rotating relative to the first shaft hole 33b and the motor 2, so that the motor 2 can drive the transmission rod 6 to rotate, and the transmission rod 6 can drive the transmission gear 36 to rotate. The irregular shape mentioned here can be an irregular shape or a regular polygon, etc. After the transmission rod 6 passes through the gearbox 3, it can be limited by the washer 8 and the limiting spring clip 5 to prevent it from detaching axially. The limiting spring clip 5 can also be an elastic retaining ring.

[0058] Output gear 35 meshes with intermediate gear 34, intermediate gear 34 meshes with output gear 35, and output gear 35 meshes with transmission gear 36. Thus, gearbox 3 and transmission rod 6 serve as the transmission system between motor 2 and transmission gear 36, realizing the transmission of driving force. Gearbox 3 is equipped with input gear 33, intermediate gear 34, and output gear 35. Gearbox 3 is a two-stage speed-increasing transmission, with the speed-increasing ratio of input gear 33 to output gear 35 between 1:2 and 1:8.

[0059] like Figure 5 As shown, the output gear 35 has a gear shaft, which can be specifically configured such that its radial dimension is smaller than that of the boss 35b. The gear shaft extends outward from the boss 35b into the housing of the gearbox 3. The transmission gear 36 has a second shaft hole 36a, into which the gear shaft is inserted and its rotation is restricted circumferentially. Similarly, both the gear shaft and the second shaft hole 36a can be irregularly shaped, or the gear shaft can be splined with the wall of the second shaft hole 36a. Figure 3 The intermediate gear shaft has a shaped section 35c, which restricts the relative rotation of the output gear 35's gear shaft and the transmission gear 36, thereby driving the transmission gear 36 to rotate synchronously. Additionally, an axial limiting member is included. The gear shaft passes through the second shaft hole 36a and connects to the axial limiting member. The axial limiting member restricts the transmission gear 36 from axially disengaging from the gear shaft. The axial limiting member can be the nut 37 shown in Figure 5. The gear shaft can have a threaded section 35d, which connects to the shaped section 35c. The nut 37 is screwed into the threaded section 35d of the gear shaft. The axial limiting member can also be other structures, such as an elastic retaining ring. In this embodiment, the bosses 35a and 35b of the output gear 35, as well as the gear shaft and output gear 35, are an integral structure with good strength for power transmission. Of course, a separate structure is also possible.

[0060] In this embodiment, the movable member 11 has a receiving portion, such as... Figure 2 As shown, the movable part 11 has an inner cavity. The movable part 11 can be formed by assembling two separate parts, or it can be a shell-like integral structure. The inner cavity of the shell forms the aforementioned receiving portion. Figure 1 Understanding that part of the gearbox 3 is located within the receiving portion of the movable member 11, the gearbox 3 can be inserted into the receiving portion from top to bottom, and after insertion, it can be fixed to the movable member 11 by bolts 9 and nuts 10. Another part of the gearbox 3 extends upward out of the movable member 11, and the first shaft hole 33a of the input gear 33 corresponds to this extended part, that is, the first shaft hole 33a is located above the movable member 11. The two ends of the transmission rod 6 can pass through the housings of the two gearboxes 3 respectively and be inserted into the two first shaft holes 33a. The movable member 11 is arranged in this way to facilitate the connection between the transmission rod 6 and the input gear 33. Of course, it is also possible for the entire gearbox 3 to be located inside the movable member 11, in which case the transmission rod 6 would also need to pass through the housing of the movable member 11.

[0061] like Figure 1 As shown, the slide rail transmission device in this embodiment of the application also includes a bracket 4. The bracket 4 connects the moving parts 11 of the two slide rail assemblies 1. The moving parts 11 can be provided with a fixing plate 112. The two ends of the bracket 4 are fixed to the fixing plate 112, specifically by screws 7. The motor 2 can be installed on the bracket 4. The bracket 4 connects the two slide rail assemblies 1, making the two slide rail assemblies 1 form a whole, improving the rigidity, stability, and synchronization of movement of the device. At the same time, it can also serve as a mounting component for the motor 2, which can reduce the shaking phenomenon when the motor 2 stalls during the first stage of startup. Furthermore, the bracket 4 facilitates the motor 2 to drive the transmission rod 6. The motor 6 can be arranged in the middle position or near the middle position of the bracket 4, thereby transmitting power to the transmission rod 6 more evenly. Figure 1 In the design, bracket 4 has a through hole through which the transmission rod 6 passes, along with the irregularly shaped hole in the motor. Bracket 4 also serves to support and stabilize the transmission rod 6. Specifically, the through hole is approximately located in the middle of the transmission rod 6. Bracket 4 can be formed by welding together tubular components and sheet metal brackets, facilitating the arrangement and assembly of the required support structure according to actual needs, and offering good flexibility. Figure 1 As shown. Of course, bracket 4 can also be made of a single sheet metal or a single plastic component.

[0062] The driving process in this embodiment is as follows:

[0063] When motor 2 starts, it drives transmission rod 6 to rotate. Transmission rod 6 drives input gear 33 to rotate. Input gear 33 drives intermediate gear 34 to rotate. Intermediate gear 34 drives output gear 35 to rotate. Output gear 35 drives transmission gear 36 to rotate. Transmission gear 36 meshes with gear teeth 121a and 1221a, thereby rotating relative to the first transmission belt 121 and the second transmission belt 1221. Ultimately, this drives the two moving parts 11 to move in the front-back direction relative to their respective tracks 12.

[0064] In this embodiment, two slide rail assemblies 1 are used for illustration. It can be seen that one or more slide rail assemblies 1 are also possible. When two or more slide rail assemblies 1 are provided, the drive unit can synchronously drive all slide rail assemblies 1 through a transmission rod 6 to ensure the synchronicity of the movement of the moving part 11. Furthermore, Figure 1 Taking the example of a groove 12d set in the track 12 and the moving part 11 inserted into the groove 12d to move, it can be seen that the cooperation structure between the moving part 11 and the track 12 is not limited to this. For example, both sides of the track 12 are provided with sliding grooves with openings facing one side, and the two sides of the moving part can be inserted into the sliding grooves to slide. As long as the track 12 is provided with a first transmission toothed belt 121 and a second transmission toothed belt 1221 with the gear teeth 121a facing downward.

[0065] This application also provides a vehicle, including a seat and a slide rail transmission device. The track of the slide rail transmission device is fixed to the vehicle body. The moving part 11 is connected to the seat, so when the moving part 11 moves, it can drive the seat to move back and forth. The front-back direction and extension direction of the track 12 are also the front-back direction of the vehicle, and the left-right direction of the track 12 is also the left-right direction of the vehicle. This vehicle has the same technical effects as the above embodiments, and will not be described again. The seat here can be a front seat or a rear seat. Especially when the slide rail transmission device is applied to the adjustment of the rear seat over a relatively long distance, the movement and cooperation of the track 12 and the moving part 11, as well as the driving method of the transmission gear 36 with the first transmission toothed belt 121 and the second transmission toothed belt 1221, are conducive to achieving stable driving under long slide rails.

[0066] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A slide rail transmission device, characterized in that, The device includes a drive unit and at least one slide rail assembly. The slide rail assembly includes a track and a moving member. The track has a downwardly extending flange that forms a first transmission toothed belt. The track has a damping strip at the position of the first transmission toothed belt, which forms a second transmission toothed belt. The first and second transmission toothed belts are arranged side by side. The moving member has a transmission gear located below the first and second transmission toothed belts and is capable of simultaneously meshing with both the first and second transmission toothed belts. The drive unit drives the transmission gear to rotate, thereby moving the moving member along the track. The track is provided with a groove, the groove having a bottom wall and side walls located on both sides of the bottom wall, and the top of at least one of the side walls extends inward and downward to form the flange; The second transmission toothed belt is located inside the flange, and the damping strip is fixed to the top wall position extending inward from the side wall by fasteners; The movable component is provided with rolling bearings on one or both sides, and the movable component is supported on the track by the rolling bearings. The movable component moves relative to the track by rolling the rolling bearings. Clearance-eliminating bearings are also provided on both sides of the track. The clearance-eliminating bearings contact the track, and the contact position is located above the support position of the rolling bearings. The clearance-eliminating bearings are inclined in the vertical direction, and the clearance-eliminating bearings on both sides are symmetrically arranged in the vertical direction. The track has a groove, which has a bottom wall and side walls on both sides of the bottom wall. The top of the side wall extends inward to form a top wall. The top wall and the side wall are connected by an arc surface. The arc surface is the top corner of the track. The clearance-free bearing contacts the arc surface and can roll along the arc surface.

2. The slide rail transmission device according to claim 1, characterized in that, The movable element is at least partially inserted into the groove and moves along the bottom wall of the groove.

3. The slide rail transmission device according to claim 1, characterized in that, The second transmission toothed belt is made of plastic.

4. The slide rail transmission device according to any one of claims 1-3, characterized in that, The slide rail transmission device includes two sets of slide rail assemblies arranged side by side. The moving part of each slide rail assembly includes a gearbox. The gearbox includes an input gear and an output gear. The output gear and the transmission gear are coaxially connected. The input gear has a first shaft hole. The drive unit includes a motor and a transmission rod. The motor drives the transmission rod to rotate. The transmission rod is simultaneously inserted into the first shaft hole of the input gear of the two gearboxes, causing the two input gears to rotate synchronously.

5. The slide rail transmission device according to claim 4, characterized in that, The output gear is provided with a gear shaft that extends out of the housing of the gearbox. The transmission gear has a second shaft hole into which the gear shaft is inserted and circumferentially restricted to rotate. It also includes an axial limiting member, through which the gear shaft passes through the second shaft hole and is connected to the axial limiting member. The axial limiting member restricts the transmission gear from detaching from the gear shaft axially.

6. The slide rail transmission device according to claim 4, characterized in that, It also includes a bracket that connects the moving parts of the two sets of slide rail assemblies, and the motor is mounted on the bracket.

7. The slide rail transmission device according to claim 5, characterized in that, The movable component has a receiving portion, a portion of the gearbox is located within the receiving portion and a portion extends upward from the movable component, the second shaft hole of the input gear is located above the movable component, and the two ends of the transmission rod are respectively inserted into the two second shaft holes.

8. A vehicle, including a seat, characterized in that, It also includes the slide rail transmission device according to any one of claims 1-7, wherein the moving member is connected to the seat.

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