Seat long sliding rail, seat long sliding rail assembly and vehicle

Abstract

The utility model discloses a seat long sliding rail, a seat long sliding rail assembly and a vehicle, the seat long sliding rail comprises an upper rail assembly (1), a lower rail assembly (2) and a transmission mechanism, the upper rail assembly is slidably installed on the lower rail assembly, the transmission mechanism comprises a driving motor (8), a gear box (5) and a lead screw (71) which are in transmission connection, the upper rail assembly comprises a Y-direction gap eliminating mechanism and a Z-direction gap eliminating mechanism, and the Y-direction gap eliminating mechanism comprises a Y-direction gap eliminating mechanism and a Z-direction gap eliminating mechanism. The Y-direction clearance eliminating mechanism comprises a first rolling piece (A), and the two Y-direction ends of the upper rail assembly and the lower rail assembly are in rolling fit through the first rolling piece (A); the Z-direction clearance eliminating mechanism further comprises a second rolling piece (C) and an elastic sliding element (D), the Z-direction upper ends of the upper rail assembly and the lower rail assembly are in sliding fit through the elastic sliding element, and the Z-direction lower ends of the upper rail assembly and the lower rail assembly are in rolling fit through the second rolling piece. The reliable rolling element and the clearance eliminating mechanism are provided, the installation adaptability of the sliding rail is improved, the sliding force is stabilized, and the problems of abnormal sound, shaking in the adjusting process and large noise are solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle seats, and particularly relates to a long seat rail, a long seat rail assembly and a vehicle. Background Art

[0002] With the rapid development of the automotive industry, the demand for comfort and intelligence of passenger cars continues to grow. As an important part that passengers directly contact, the convenience and comfort of the adjustment mechanism of the seat have received more and more attention.

[0003] Among them, the long seat rail used to realize the front-back position adjustment of the seat usually includes an upper rail and a lower rail. The upper rail is slidably installed inside the lower rail. The lower rail is connected to the vehicle body, and the upper rail is connected to the seat. The upper rail slides relative to the lower rail to realize the front-back position adjustment of the seat. In the long seat rail of the related technology, in order to ensure the smooth sliding of the upper rail and the lower rail, there is a fitting clearance between the upper rail and the lower rail. However, due to the structure of the rail itself, it cannot adapt to the dimensional tolerances of the seat and the vehicle body, resulting in problems such as jitter and excessive noise during the seat adjustment process. Utility Model Content

[0004] The purpose of the present application is to provide a long seat rail, a long seat rail assembly and a vehicle, so as to solve the problems of abnormal noise, jitter and large noise during the adjustment process.

[0005] To solve the above technical problems, the present application provides a long seat rail, which includes an upper rail assembly, a lower rail assembly and a transmission mechanism. The upper rail assembly is partially slidably installed inside the lower rail assembly. The transmission mechanism includes a gear box, a lead screw and a driving motor. The lead screw is installed along the X direction inside the lower rail assembly. The driving motor and the gear box are both installed on the upper rail assembly. The lead screw passes through the gear box and is in transmission connection with the transmission components inside the gear box. The driving motor is in transmission connection with the transmission components inside the gear box;

[0006] The upper rail assembly includes a Y-direction clearance elimination mechanism and a Z-direction clearance elimination mechanism, where:

[0007] The Y-direction clearance elimination mechanism includes a first rolling element, and the Y-direction two ends of the upper rail assembly and the lower rail assembly are in rolling fit through the first rolling element;

[0008] The Z-direction clearance elimination mechanism includes a second rolling element and an elastic sliding element. The upper ends in the Z direction of the upper rail assembly and the lower rail assembly are in sliding fit through the elastic sliding element, and the lower ends in the Z direction of the upper rail assembly and the lower rail assembly are in rolling fit through the second rolling element.

[0009] Among them, the transmission components inside the gearbox include a worm-worm gear transmission mechanism or a worm-helical gear transmission mechanism. The worm-worm gear transmission mechanism specifically includes a meshing worm and worm gear, and the worm-helical gear transmission mechanism specifically includes a meshing worm and helical gear. The drive motor is directly or indirectly connected to the worm in a transmission manner. The worm gear or helical gear is connected to the lead screw in a transmission manner through an internal thread. When the front-back position of the seat needs to be adjusted, the drive motor drives the worm to rotate. The worm gear or helical gear rotates under the meshing force with the worm and simultaneously moves along the extension direction of the lead screw under the meshing force with the lead screw, thereby realizing the position adjustment of the seat (upper rail assembly) in the X direction. It can be seen that the clearance value of the long seat rail in the X direction depends on the matching accuracy of the worm-helical gear or worm-worm gear, and the matching accuracy of the helical gear-lead screw or worm gear-lead screw, and satisfies self-locking at any position. Therefore, by adjusting the matching accuracy of the worm-helical gear or worm-worm gear, and the matching accuracy of the helical gear-lead screw or worm gear-lead screw, the clearance of the long seat rail in the X direction can be eliminated.

[0010] Meanwhile, in the long seat rail of the present application, the upper rail assembly 1 includes a clearance elimination mechanism in the Y direction and a clearance elimination mechanism in the Z direction. The clearance elimination mechanism in the Y direction includes a first rolling element. The two ends of the upper rail assembly and the lower rail assembly in the Y direction are in rolling fit through the first rolling element. In this way, the upper rail assembly and the lower rail assembly achieve zero-clearance fit in the Y direction, ensuring the relative position accuracy of the upper rail assembly and the lower rail assembly in the Y direction, minimizing the occurrence of abnormal noise problems during the adjustment of the front-back position of the seat, improving the riding comfort. At the same time, the sliding resistance of the upper rail assembly is reduced through the rolling fit, ensuring the smooth sliding of the upper rail assembly.

[0011] Furthermore, in the present application, the clearance elimination mechanism in the Z direction further includes a second rolling element and an elastic sliding element. The upper ends of the upper rail assembly and the lower rail assembly in the Z direction are in sliding fit through the elastic sliding element, and the lower ends of the upper rail assembly and the lower rail assembly are in rolling fit through the second rolling element, thereby eliminating the fitting clearance between the upper rail assembly and the lower rail assembly in the Z direction; at the same time, the rolling fit of the lower ends of the upper rail assembly and the lower rail assembly through the second rolling element can also reduce the sliding resistance of the upper rail assembly. The upper ends of the upper rail assembly and the lower rail assembly are elastically fitted through the elastic sliding element. By adjusting the elastic force of the elastic sliding element, the friction force between the upper rail assembly and the lower rail assembly can also be adjusted.

[0012] To sum up, the long slide rail of the seat in this embodiment adopts a screw-gear box transmission mechanism, and additionally provides a Y-direction gap elimination mechanism and a Z-direction gap elimination mechanism to eliminate the matching gaps between the upper rail assembly and the lower rail assembly in the X-direction, Y-direction and Z-direction. This enables the long slide rail of the seat in this embodiment to have excellent gap elimination capabilities in all directions, thereby avoiding the occurrence of abnormal noise problems during driving. At the same time, it can also effectively improve the adaptability of the long slide rail of the seat in this embodiment to the surrounding installation environment, reduce the installation accuracy requirements for the surrounding environment, reduce internal friction, and maintain the sliding stability of the slide rail, thereby ensuring smooth adjustment and noise stability, and improving comfort.

[0013] Optionally, the upper rail assembly includes an upper slide rail, and the upper rail assembly also includes an anti-gap bracket, the anti-gap bracket is connected to the upper slide rail, and the first rolling member, the second rolling member and the elastic sliding element are connected to the anti-gap bracket.

[0014] Optionally, the upper rail assembly includes an upper rail side plate, the drive motor is fixed to the upper rail side plate, and the drive motor is directly or indirectly connected to the transmission component inside the gear box to provide power.

[0015] Optionally, the upper rail assembly and the lower rail assembly are also slidably matched in the Y direction through the elastic sliding element; and the upper rail assembly and the lower rail assembly are also rollingly matched in the Z direction through a rolling element.

[0016] Optionally, a gear box bracket is connected to the inner wall of the upper rail assembly, the gear box bracket is closed along the circumferential direction, the gear box bracket is provided with an open end, and the gear box is installed inside the gear box bracket.

[0017] Optionally, the transmission assembly inside the gear box includes a worm-worm wheel transmission mechanism or a worm-helical gear transmission mechanism, the drive motor is directly or indirectly connected to the worm, and the worm wheel or helical gear is connected to the lead screw.

[0018] The present application also provides a long seat slide rail assembly, comprising two of the aforementioned long seat slide rails, wherein the two long seat slide rails are arranged in parallel.

[0019] The long seat slide rail assembly of the present application includes the aforementioned long seat slide rail, and therefore has the same technical effect as the aforementioned long seat slide rail, which will not be repeated here.

[0020] The present application also provides a vehicle, including a body, a seat, and the aforementioned long seat slide rail assembly, wherein two lower rail assemblies in the long seat slide rail assembly are connected to the body, and two upper rail assemblies in the long seat slide rail assembly are connected to the seat.

[0021] The vehicle of the present application includes the aforementioned long seat rail assembly, and thus has the same technical effects as the aforementioned long seat rail assembly, which will not be elaborated herein. Description of the Drawings

[0022] Figure 1 It is a schematic structural diagram of a specific embodiment of the long seat rail assembly provided by the present application;

[0023] Figure 2 is Figure 1 a schematic structural diagram of the long seat rail in the long seat rail assembly;

[0024] Figure 3 is Figure 2 a split view of the long seat rail;

[0025] Figure 4 is Figure 2 a split view of the upper rail assembly in the long seat rail;

[0026] Figure 5 is Figure 2 a schematic structural diagram of the clearance elimination bracket in the long seat rail;

[0027] Figure 6 is Figure 2 a schematic structural diagram of the upper rail in the long seat rail;

[0028] Among them, Figures 1-6 the reference numerals in

[0029] 01 - long seat rail;

[0030] 1 - upper rail assembly; 1A - upper rail; 1A1 - second body part; 1A2 - second folding part; 1B - clearance elimination bracket; 1B1 - first body part; 1B2 - first folding part; 1B3 - connecting part; 1B4 - spacing groove; 1B5 - avoidance hole; 1C - upper rail side plate; 1D - seat mounting nut; 1E - motor fixing bracket; 1F - transmission shaft;

[0031] 2 - lower rail assembly; 2A - lower rail;

[0032] 41 - first rolling shaft; 42 - second rolling shaft;

[0033] 5 - gearbox; 5a - second connecting hole;

[0034] 6 - gearbox bracket; 6a - first connecting hole; 6b - through hole;

[0035] 71 - lead screw; 72 - lead screw support; 73 - lead screw support connecting piece;

[0036] 8 - drive motor;

[0037] 9 - Gearbox Connector;

[0038] A - First rolling element; C - Second rolling element; D - Elastic sliding element;

[0039] a - Limit groove; b - Folded part. Detailed implementation

[0040] To enable those skilled in the art to better understand the technical solution of this application, the following further elaborates on this application in combination with the attached drawings and specific embodiments.

[0041] Please refer to Figures 1-6 , Figure 1 which is a schematic structural diagram of a specific embodiment of the seat long slide rail assembly provided by this application; Figure 2 is Figure 1 a schematic structural diagram of the seat long slide rail in the seat long slide rail assembly; Figure 3 is Figure 2 a split view of the seat long slide rail; Figure 4 is Figure 2 a split view of the upper rail assembly in the seat long slide rail; Figure 5 is Figure 2 a schematic structural diagram of the clearance elimination bracket in the seat long slide rail; Figure 6 is Figure 2 a schematic structural diagram of the upper slide rail in the seat long slide rail.

[0042] This embodiment provides a seat long slide rail 01, including an upper rail assembly 1, a lower rail assembly 2 and a transmission mechanism. The upper rail assembly 1 is partially slidably installed inside the lower rail assembly 2. The transmission mechanism includes a gearbox 5, a lead screw 71 and a drive motor 8. The lead screw 71 is installed along the X direction inside the lower rail assembly 2. The drive motor 8 and the gearbox 5 are both installed on the upper rail assembly 1. The lead screw 71 passes through the gearbox 5 and is in transmission connection with the transmission components inside the gearbox 5. The drive motor 8 is in transmission with the transmission components inside the gearbox 5;

[0043] The upper rail assembly 1 includes a Y - direction clearance elimination mechanism and a Z - direction clearance elimination mechanism, where:

[0044] The Y - direction clearance elimination mechanism includes a first rolling element A. The Y - direction ends of the upper rail assembly 1 and the lower rail assembly 2 are in rolling fit through the first rolling element A;

[0045] The Z - direction clearance elimination mechanism includes a second rolling element C and an elastic sliding element D. The upper ends of the upper rail assembly 1 and the lower rail assembly 2 in the Z - direction are in sliding fit through the elastic sliding element D, and the lower ends of the upper rail assembly 1 and the lower rail assembly 2 in the Z - direction are in rolling fit through the second rolling element C.

[0046] Among them, the transmission assembly inside the gear box 5 includes a worm-worm wheel transmission mechanism or a worm-bevel gear transmission mechanism, the worm-worm wheel transmission mechanism specifically includes meshing worm and worm wheel, the worm-bevel gear transmission mechanism specifically includes meshing worm and bevel gear, the drive motor 8 is directly or indirectly connected to the worm, the worm wheel or bevel gear is connected to the lead screw 71 through an internal thread, when the front and rear position of the seat needs to be adjusted, the drive motor 8 drives the worm to rotate, the worm wheel or bevel gear rotates under the meshing force with the worm, and at the same time moves along the extension direction of the lead screw 71 under the meshing force with the lead screw 71, thereby realizing the position adjustment of the seat (upper rail assembly 1) in the X direction. It can be seen that the clearance value of the long slide rail 01 of the seat in the X direction depends on the matching accuracy of the worm-bevel gear or worm-worm wheel, as well as the matching accuracy of the bevel gear-lead screw or worm wheel-lead screw, and it can be self-locked at any position. Therefore, by adjusting the matching accuracy of the worm-bevel gear or worm-worm wheel, and the matching accuracy of the bevel gear-screw or worm wheel-screw, the gap of the long seat slide rail 01 in the X direction can be eliminated.

[0047] At the same time, in the long seat slide rail 01 of the present embodiment, the upper rail assembly 1 includes a Y-direction gap elimination mechanism and a Z-direction gap elimination mechanism, and the Y-direction gap elimination mechanism includes a first rolling member A, and the Y-direction ends of the upper rail assembly 1 and the lower rail assembly 2 are rollingly matched through the first rolling member A. In this way, the upper rail assembly 1 and the lower rail assembly 2 achieve zero gap matching in the Y direction through the first rolling member A, thereby ensuring the relative position accuracy of the upper rail assembly 1 and the lower rail assembly 2 in the Y direction, minimizing the occurrence of jitter and abnormal noise problems during the front and rear position adjustment of the seat, and improving riding comfort. At the same time, the sliding resistance of the upper rail assembly 1 is reduced through rolling matching to ensure the smooth sliding of the upper rail assembly 1.

[0048] Furthermore, in the present embodiment, the Z-direction clearance elimination mechanism further includes a second rolling member C and an elastic sliding element D. The upper ends of the upper rail assembly 1 and the lower rail assembly 2 are elastically matched through the elastic sliding element D, and the lower ends of the upper rail assembly 1 and the lower rail assembly 2 are rolling matched through the second rolling member C, thereby eliminating the matching clearance between the upper rail assembly 1 and the lower rail assembly 2 in the Z direction; at the same time, the rolling match of the lower ends of the upper rail assembly 1 and the lower rail assembly 2 through the second rolling member C can also reduce the sliding resistance of the upper rail assembly 1, thereby ensuring the sliding smoothness of the upper rail assembly 1. The upper ends of the upper rail assembly 1 and the lower rail assembly 2 are elastically matched through the elastic sliding element D, and the friction between the upper rail assembly 1 and the lower rail assembly 2 can be adjusted by adjusting the elastic force of the elastic sliding element D, thereby ensuring the relative position accuracy between the upper rail assembly 1 and the lower rail assembly 2.

[0049] In summary, the long seat slide rail 01 of this embodiment adopts a lead screw - gearbox transmission mechanism, and additionally provides a clearance elimination mechanism in the Y - direction and a clearance elimination mechanism in the Z - direction to eliminate the fitting clearances between the upper rail assembly 1 and the lower rail assembly 2 in the X - direction, Y - direction, and Z - direction. As a result, the long seat slide rail 01 of this embodiment has excellent clearance elimination capabilities in all directions, solving problems such as abnormal noises, jitters, and large noises during the adjustment process. At the same time, it can also effectively improve the adaptability of the long seat slide rail 01 of this embodiment to the surrounding installation environment, reduce the requirements for the installation accuracy of the surrounding environment, reduce internal friction, maintain the sliding stability of the slide rail, thereby ensuring the smoothness of adjustment and the stability of noise, and improving comfort.

[0050] Please refer to Figures 2-5 , in this embodiment, the upper rail assembly 1 includes an upper slide rail 1A. The upper rail assembly 1 further includes a clearance elimination bracket 1B. The clearance elimination bracket 1B is connected to the upper slide rail 1A. The first rolling element A, the second rolling element C, and the elastic sliding element D are connected to the clearance elimination bracket 1B.

[0051] Since the upper rail assembly 1 needs to be connected to the seat and directly plays a supporting role, the upper rail assembly 1 has higher requirements for structural strength. Therefore, in this embodiment, the clearance elimination bracket 1B is connected to the upper slide rail 1A, and from Figure 2 and Figure 5 It can be seen that in this embodiment, the cross - section of the clearance elimination bracket 1B is a U - shape similar to that of the upper slide rail 1A. Specifically, the clearance elimination bracket 1B includes a first body portion 1B1. The inside of the first body portion 1B1 is a hollow structure. The lower end of the first body portion 1B1 is an open end. The two side walls at the open end of the first body portion 1B1 are first bent outward in the Y - direction to form a transverse bending portion, and part of the transverse bending portion is then bent upward in the Z - direction to form a first folding portion 1B2. The upper slide rail 1A includes a second body portion 1A1. The inside of the second body portion 1A1 is a hollow structure. The lower end of the second body portion 1A1 is an open end. The two side walls at the open end of the second body portion 1A1 are first bent outward in the Y - direction and then bent upward in the Z - direction to form a second folding portion 1A2. The clearance elimination bracket 1B is connected to the inside of the upper slide rail 1A. Part of the first body portion 1B1 is located inside the second body portion 1A1 and is in contact with the corresponding inner wall of the second body portion 1A1. The outer wall of the second folding portion 1A2 is in contact with the first folding portion 1B2. It can be seen that the clearance elimination bracket 1B can play a role in strengthening the structure of the upper slide rail 1A, improving the structural strength of the upper rail assembly 1, and enhancing the support stability of the upper rail assembly 1 for the seat.

[0052] At the same time, the clearance elimination bracket 1B also provides connection positions for the clearance elimination mechanism in the Y - direction and the clearance elimination mechanism in the Z - direction, realizing the integration of the first rolling element A, the second rolling element C, and the elastic sliding element D, and improving the installation accuracy and stability of the first rolling element A, the second rolling element C, and the elastic sliding element D.

[0053] As Figure 2As shown, in this embodiment, the wall thicknesses of the backlash-eliminating bracket 1B, the upper rail assembly 1, and the lower rail assembly 2 are equal. In this way, the backlash-eliminating bracket 1B, the upper rail assembly 1, and the lower rail assembly 2 can be made of the same material, such as high-strength steel, to reduce material costs.

[0054] In some other embodiments of the present application, the wall thicknesses of the backlash-eliminating bracket 1B, the upper rail assembly 1, and the lower rail assembly 2 may also be unequal.

[0055] It can be seen that in this embodiment, the backlash-eliminating bracket 1B is designed to be shaped like the upper slide rail 1A; in practice, it is also feasible that the structure of the backlash-eliminating bracket 1B is different from that of the upper slide rail 1A. The backlash-eliminating bracket 1B is connected to the upper slide rail 1A, and the integrated function of the first rolling element A, the second rolling element C, and the elastic sliding element D can still be achieved.

[0056] From Figure 5 It can be seen that in this embodiment, the long seat slide rail 01 further includes a first rolling shaft 41 and a second rolling shaft 42. The first rolling shaft 41 is connected to the backlash-eliminating bracket 1B and extends along the Z direction. The first rolling element A is connected to the first rolling shaft 41 and can rotate around the first rolling shaft 41; the second rolling shaft 42 is connected to the backlash-eliminating bracket 1B and extends along the Y direction. The second rolling element C is connected to the second rolling shaft 42 and can rotate around the second rolling shaft 42.

[0057] In practice, the backlash-eliminating bracket 1B and the upper slide rail 1A can be fixed by welding, bolt connection, riveting, etc. to ensure the reliability of their connection.

[0058] From Figure 5 It can be seen that in this embodiment, two first rolling elements A are connected to the same backlash-eliminating bracket 1B. The two first rolling elements A are correspondingly arranged at both ends of the backlash-eliminating bracket 1B in the Y direction. While ensuring the backlash-eliminating effect and the smooth adjustment of the upper rail assembly 1, the number of parts is reduced and the cost is lowered. In practice, multiple first rolling elements A can also be arranged at the same end of the backlash-eliminating bracket 1B in the Y direction to increase the rolling contact area between the upper rail assembly 1 and the lower rail assembly 2 and improve the relative position accuracy of the upper rail assembly 1 and the lower rail assembly 2.

[0059] Similarly, in this embodiment, two second rolling elements C are connected to the same backlash-eliminating bracket 1B. The two second rolling elements C are correspondingly arranged at both ends of the backlash-eliminating bracket 1B in the Y direction. While ensuring the backlash-eliminating effect and the smooth adjustment of the upper rail assembly 1, the support stability of the upper rail assembly 1 is improved, the number of parts is reduced, and the cost is lowered. In practice, multiple second rolling elements C can also be arranged at the same end of the backlash-eliminating bracket 1B in the Y direction to increase the rolling contact area between the upper rail assembly 1 and the lower rail assembly 2 and improve the relative position accuracy of the upper rail assembly 1 and the lower rail assembly 2.

[0060] In addition, fromFigure 3 and Figure 4 It can be seen that in order to ensure that the upper rail assembly 1 is always in zero-clearance fit with the lower rail assembly 2 during the front-back position adjustment, when the clearance-eliminating bracket 1B is connected to the upper slide rail 1A, it is only necessary to be arranged at least at both ends in the length direction of the upper slide rail 1A. Therefore, in this embodiment, the number of clearance-eliminating brackets 1B is two and they are arranged at both ends in the length direction of the upper slide rail 1A, reducing the number of parts of the seat long slide rail 01, saving materials and reducing material costs.

[0061] Please continue to refer to Figure 5 , in this embodiment, both side walls of the clearance-eliminating bracket 1B in the Y direction have connecting portions 1B3, the first rolling member A is connected to the connecting portion 1B3, and both side walls of the clearance-eliminating bracket 1B in the Y direction also have spacing grooves 1B4, and the spacing grooves 1B4 separate the connecting portion 1B3 from other parts except the connecting portion 1B3 in the corresponding side walls.

[0062] From Figure 5 It can be seen that in this embodiment, the connecting portion 1B3 is located at the edge of the corresponding side wall. Therefore, one spacing groove 1B4 is provided in the corresponding side wall of the clearance-eliminating bracket 1B to separate the connecting portion 1B3 from other parts, so that the connecting portion 1B3 is more likely to deform when subjected to an extrusion force. In this way, when not installed, the distance between the opposite sides of the two first rolling members A can be set to be greater than the distance between the two inner walls of the lower rail assembly 2 in the Y direction. When installed, the two first rolling members A will deform in the direction of approaching each other under the extrusion force of the two inner walls of the lower rail assembly 2 in the Y direction, so that the lower slide rail 2A can be smoothly installed inside the lower rail assembly 2. At the same time, after the lower slide rail 2A is installed inside the lower rail assembly 2, the first rolling member A can abut against the corresponding inner wall of the lower rail assembly 2 in the Y direction, realizing zero-clearance fit between the upper rail assembly 1 and the lower rail assembly 2 in the Y direction.

[0063] It can be understood that by adjusting the extension length of the spacing groove 1B4, the deformation ability of the connecting portion 1B3 can be changed. The longer the extension length of the spacing groove 1B4, the greater the deformation ability of the connecting portion 1B3. In practice, the extension length of the spacing groove 1B4 can be adaptively adjusted according to the deformation requirements.

[0064] Similarly, taking Figure 5 the perspective of... as an example, the smaller the distance between the spacing groove 1B4 and the adjacent end edge of the clearance-eliminating bracket 1B, that is, the smaller the width of the connecting portion 1B3, the greater the deformation ability of the connecting portion 1B3. In practice, the setting position of the spacing groove 1B4 can be adaptively adjusted by comprehensively considering the installation space requirements and deformation requirements of the first rolling member A.

[0065] In some other embodiments of the present application, the connecting portion 1B3 may be located in the middle of the corresponding side wall of the backlash-eliminating bracket 1B. At this time, two spaced grooves 1B4 are provided on the corresponding side wall of the backlash-eliminating bracket 1B to isolate the connecting portion 1B3 from other parts.

[0066] As Figure 5 shown, in this embodiment, the connecting portion 1B3 is provided with an avoidance hole 1B5 to avoid the first rolling element A.

[0067] Please continue to refer to Figure 2 , in this embodiment, the upper rail assembly 1 and the lower rail assembly 2 are also slidably mated in the Y direction through an elastic sliding element D.

[0068] In this way, the elastic sliding element D can also generate a certain frictional force between the upper rail assembly 1 and the lower rail assembly 2, hindering the abnormal sliding of the upper rail assembly 1 (seat), ensuring the position stability of the seat, and the frictional force between the upper rail assembly 1 and the lower rail assembly 2 can be adjusted by adjusting the elastic force of the elastic sliding element D.

[0069] It can be understood that in this embodiment, the elastic sliding element D can also play a role in assisting in eliminating the Y-directional mating clearance between the upper rail assembly 1 and the lower rail assembly 2. However, the rolling mating method makes the first rolling element A less likely to wear, and even after long-term use, the first rolling element A can still stably play the role of clearance elimination.

[0070] As Figure 2 shown, in this embodiment, the interior of the lower rail assembly 2 is a hollow structure, the upper end of the lower rail assembly 2 is an open end, and the two side walls of the open end of the lower rail assembly 2 are first bent downward along the Y direction into the interior of the lower rail assembly 2, and then bent downward along the Z direction. Thus, the open end of the lower rail assembly 2 forms a limiting groove a at both ends in the Y direction, and the lower end of the limiting groove a is an open end.

[0071] The interior of the upper rail assembly 1 is a hollow structure, the lower end of the upper rail assembly 1 is an open end, the two side walls of the open end of the upper rail assembly 1 are first bent outward along the Y direction, and then bent upward along the Z direction. The cross-section of the upper rail assembly 1 is generally in a shape like the Chinese character "ji", and the upwardly bent structure forms a folding portion b.

[0072] From Figure 2 it can be seen that in this embodiment, the elastic sliding element D is connected to the folding portion b and is located inside the limiting groove a. The two side walls of the folding portion b in the Y direction are in contact with the corresponding inner walls of the limiting groove a through the elastic sliding element D. It can be seen that the elastic sliding element D can also adjust the attitude of the folding portion b inside the limiting groove a, making the position of the folding portion b as centered as possible, and improving the relative position accuracy of the upper rail assembly and the lower rail assembly.

[0073] From Figure 2It can be seen that limiting grooves a are also formed at both ends of the upper rail assembly 1 in the Y direction. The upper ends of the limiting grooves a are open ends. The downwardly bent structure of the lower rail assembly 2 also forms a folding portion b. Therefore, in some embodiments of the present application, the elastic sliding element D can also be disposed inside the limiting groove a of the upper rail assembly 1 and on both sides of the folding portion b in the Y direction. Of course, in this embodiment, the friction member 3 is connected to the folding portion b of the lower rail assembly 2 and is located inside the limiting groove a of the upper rail assembly 1. The open end of the limiting groove a of the upper rail assembly 1 faces downward, which can prevent foreign objects from entering the inside of the limiting groove a of the upper rail assembly 1 and avoid abnormal wear of the friction member 3 caused by foreign objects.

[0074] It can be understood that in practice, the upper rail assembly 1 and the lower rail assembly 2 are not limited to the above structural forms. Therefore, the elastic sliding element D is not limited to the above connection positions either. As long as the elastic sliding element D is located in the inner cavity of the lower rail assembly 2 and can play the aforementioned functions of eliminating clearance and adjusting friction force, it is sufficient.

[0075] Please refer to Figure 3 and Figure 6 , in this embodiment, a gearbox bracket 6 is connected to the inner wall of the upper rail assembly 1. The gearbox bracket 6 is closed in the circumferential direction and has an open end. The gearbox 5 is installed inside the gearbox bracket 6.

[0076] With the above arrangement, the gearbox 5 can be inserted into the inside of the gearbox bracket 6 through the open end. The gearbox bracket 6 is closed in the circumferential direction, making the structural strength of the gearbox bracket 6 higher and ensuring the installation stability of the gearbox 5.

[0077] From Figure 3 It can be seen that the long seat rail 01 further includes two lead screw supports 72 and a plurality of lead screw support connectors 73. The lead screw supports 72 are installed inside the lower rail assembly 2 through the lead screw support connectors 73. The two lead screw supports 72 are distributed along the extending direction of the lower rail assembly 2. Both ends of the lead screw 71 are connected to the lead screw supports 72.

[0078] Furthermore, in this embodiment, the upper rail assembly 1 further includes an upper rail side plate 1C, and the drive motor 8 is fixed to the upper rail side plate 1C. Thus, it can be seen that the upper rail side plate 1C can function as a mounting for the drive motor 8.

[0079] As Figure 3 shown, the upper rail side plate 1C is connected to the upper rail 1A and extends upward. Seat mounting nuts 1D are provided at both ends of the upper rail side plate 1C in the length direction. The seat mounting nuts 1D are used to connect the upper rail side plate 1C and the seat, realizing a reliable connection between the upper rail assembly 1 and the seat.

[0080] The upper rail assembly 1 further includes a motor fixing bracket 1E and a transmission shaft 1F. The motor fixing bracket 1E is connected to the upper slide rail side plate 1C and corresponds to the position of the gearbox bracket 6. The driving motor 8 is connected to the motor fixing bracket 1E, thereby achieving fixation with the upper rail side plate 1C.

[0081] The upper rail assembly 1 is also provided with a shaft hole, and the transmission shaft 1F is rotatably inserted inside the shaft hole. The driving motor 8 is indirectly connected to the gear transmission assembly inside the gearbox 5 through the transmission shaft 1F to provide power.

[0082] In some other embodiments of the present application, the upper rail assembly does not have a transmission shaft 1F, and the driving motor 8 is directly connected to the gear transmission assembly inside the gearbox 5 to provide power.

[0083] Furthermore, as Figure 6 shown, in this embodiment, the gearbox bracket 6 is provided with a first connection hole 6a, and the gearbox 5 is provided with a second connection hole 5a. When the gearbox 5 is installed inside the gearbox bracket 6, the first connection hole 6a and the second connection hole 5a are correspondingly communicated. It further includes a gearbox connecting piece 9, and the gearbox connecting piece 9 is inserted inside the corresponding first connection hole 6a and second connection hole 5a to achieve the fixation of the gearbox 5 and the gearbox bracket 6 and prevent the gearbox 5 from disengaging from the inside of the gearbox bracket 6. Among them, the gearbox connecting piece 9 can be a screw, a pin, etc., with reliable connection and convenient disassembly and assembly.

[0084] In addition, as Figure 6 shown, the gearbox bracket 6 is correspondingly provided with through holes 6b on both side walls along the length direction of the upper rail assembly 1 for the lead screw 71 to pass through.

[0085] This embodiment also provides a seat long slide rail assembly, which includes two of the aforementioned seat long slide rails 01, and the two seat long slide rails 01 are arranged in parallel.

[0086] The seat long slide rail assembly of this embodiment includes the aforementioned seat long slide rail 01, so it has the same technical effects as the aforementioned seat long slide rail 01, which will not be elaborated here.

[0087] As can be seen from the foregoing, in this embodiment, each seat long slide rail 01 includes a driving motor 8, and the two driving motors 8 together achieve the front-back position adjustment of the seat, improve the magnitude of the driving force received by the seat, and at the same time, the two driving motors 8 form a redundant design to ensure the normal operation of the seat long slide rail assembly; in addition, the connection fixing bracket between the two seat long slide rails 01 can also be omitted, leaving the space between the two seat long slide rails 01 empty, which is convenient for the flexible layout of the whole vehicle.

[0088] This embodiment also provides a vehicle, including a vehicle body, a seat, and the aforementioned seat long slide rail assembly. Two lower rail assemblies 2 in the seat long slide rail assembly are connected to the vehicle body, and two upper rail assemblies 1 in the seat long slide rail assembly are connected to the seat.

[0089] The vehicle of this embodiment includes the aforementioned seat long slide rail assembly, and thus has the same technical effects as the aforementioned seat long slide rail assembly, which will not be elaborated here.

[0090] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, 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 long seat slide rail, characterized in that: The invention comprises an upper rail assembly (1), a lower rail assembly (2) and a transmission mechanism, wherein the upper rail assembly (1) is partially slidably mounted inside the lower rail assembly (2), and the transmission mechanism comprises a gear box (5), a screw rod (71) and a drive motor (8), wherein the screw rod (71) is mounted inside the lower rail assembly (2) along the X direction, and the drive motor (8) and the gear box (5) are both mounted on the upper rail assembly (1), the screw rod (71) passes through the gear box (5) and is in transmission connection with a transmission component inside the gear box (5), and the drive motor (8) is in transmission connection with the transmission component inside the gear box (5); The upper rail assembly (1) comprises a Y-direction clearance elimination mechanism and a Z-direction clearance elimination mechanism, wherein: The Y-direction clearance elimination mechanism comprises a first rolling member (A), and the two ends of the upper rail assembly (1) and the lower rail assembly (2) in the Y-direction are rollingly engaged with each other through the first rolling member (A); The Z-direction clearance elimination mechanism comprises a second rolling member (C) and an elastic sliding element (D); the Z-upward ends of the upper rail assembly (1) and the lower rail assembly (2) are slidably engaged via the elastic sliding element (D); and the Z-downward ends of the upper rail assembly (1) and the lower rail assembly (2) are rollingly engaged via the second rolling member (C).

2. The long seat slide rail according to claim 1, characterized in that: The upper rail assembly (1) comprises an upper slide rail (1A), and the upper rail assembly (1) further comprises a clearance-eliminating bracket (1B), the clearance-eliminating bracket (1B) is connected to the upper slide rail (1A), and the first rolling member (A), the second rolling member (C) and the elastic sliding element (D) are all connected to the clearance-eliminating bracket (1B).

3. The long seat slide rail according to claim 1, characterized in that: The upper rail assembly (1) comprises an upper rail side plate (1C), the drive motor (8) is fixed to the upper rail side plate (1C), and the drive motor (8) is directly or indirectly connected to the transmission component inside the gear box (5) to provide power.

4. The long seat slide rail according to any one of claims 1 to 3, characterized in that: The upper rail assembly (1) and the lower rail assembly (2) are also slidably engaged in the Y direction via the elastic sliding element (D); and the upper ends of the upper rail assembly (1) and the lower rail assembly (2) are also rollingly engaged in the Z direction via a rolling element.

5. The long seat slide rail according to any one of claims 1 to 3, characterized in that: The inner wall of the upper rail assembly (1) is connected to a gear box bracket (6), the gear box bracket (6) is closed along the circumferential direction, the gear box bracket (6) is provided with an open end, and the gear box (5) is installed inside the gear box bracket (6).

6. The long seat slide rail according to any one of claims 1 to 3, characterized in that: The transmission assembly inside the gear box (5) comprises a worm-worm wheel transmission mechanism or a worm-helical gear transmission mechanism, the drive motor (8) is directly or indirectly connected to the worm, and the worm wheel or helical gear is connected to the lead screw (71).

7. A long seat slide rail assembly, characterized in that: It comprises two long seat slide rails (01) according to any one of claims 1 to 6, and the two long seat slide rails (01) are arranged in parallel.

8. A vehicle, characterized in that: It comprises a vehicle body, a seat, and the long seat slide rail assembly as claimed in claim 7, wherein two lower rail assemblies (2) of the long seat slide rail assembly are connected to the vehicle body, and two upper rail assemblies (1) of the long seat slide rail assembly are connected to the seat.

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