A long sliding rail for car seats with good gap elimination effect

Abstract

A long sliding rail for car seats with good backlash reduction includes a pair of fixed guide rails, each with a transmission screw inside its cavity; a pair of sliding guide rails, located within the cavities of the two fixed guide rails and extending upwards, both engaging with the fixed guide rails; and a drive mechanism located between the two sliding guide rails. Features include four sliding seats, each connected to the vehicle seat frame, which are engaged in pairs at both ends of the sliding guide rails, with the sliding seats extending into the cavities of the fixed guide rails for sliding engagement. Two transmission screws pass through and connect to their respective sliding seats. Four backlash reduction components, arranged in pairs at the front and rear of the sliding guide rails, each component including a backlash reduction fixing element, a pair of backlash reduction adjusting plates, a pair of adjusting rollers, and a pair of elastic elements. This ensures smooth operation of the sliding guide rail, eliminates abnormal noise, improves ride comfort, and extends service life; it also features a compact structure and small size.

Description

Technical Field

[0001] This invention belongs to the field of vehicle parts technology, specifically relating to a long slide rail for car seats with good gap reduction effect. Background Technology

[0002] With the rapid improvement of people's living standards and the continuous advancement of science and technology, the automotive industry has developed by leaps and bounds, and people's requirements for car quality and comfort are also constantly increasing. As an important part of a car, superior seat design can bring passengers a comfortable riding experience. Different types of vehicles have different requirements for seats. For some small family cars with less space and lower requirements for comfort, most use two seats in the front row that can move back and forth and have adjustable backrest angles, and the rear seats have a fixed structure. For some large commercial vehicles with higher requirements for comfort, there will be functions such as backrest adjustment, back and forth movement, vertical height adjustment, and even seat rotation functions to facilitate passenger entry and comfortable riding. With the continuous improvement of the level of intelligence in the automotive industry and the rapid development of autonomous driving technology, the requirements for the fore-and-aft movement distance of vehicle seats are getting higher and higher, that is, the requirement for the fore-and-aft movement distance of vehicle seats is to be longer, so that the interior space is more flexible and versatile, making it easier for passengers to move around, thereby greatly improving user comfort and space utilization. Therefore, this kind of vehicle seat with long fore-and-aft movement and long sliding rail structure, which originally only existed in some large luxury commercial vehicles, has become an increasingly important focus of current intelligent vehicle research and development.

[0003] With the advancement of technology, the method of adjusting vehicle seats forward and backward has gradually shifted from manual sliding to electric sliding. Existing Chinese patent literature contains numerous technical information related to electric long slide rail mechanisms for vehicle seats. Examples include CN217227347U "A Long Slide Rail for an Automobile Seat", CN114084047A "An Electric Slide Rail for an Automobile Seat", and CN110626222A "An Electric Slide Rail for an Automobile Seat". These technical solutions each have their own advantages but also share common problems. A typical example is CN216993992U, which describes an automobile seat with a high-strength slide rail. The chair includes a seat cushion frame and a slide rail structure. The seat cushion frame includes a seat frame side panel. The slide rail structure includes an upper slide rail, a lower slide rail, a reinforcing inner rail, and a reinforcing outer rail. The upper slide rail is wrapped in the lower slide rail and can slide relative to the lower slide rail. The reinforcing outer rail is wrapped outside the reinforcing inner rail and can slide relative to the reinforcing inner rail. The reinforcing inner rail is wrapped outside the lower slide rail and is fixedly connected to the lower slide rail at the bottom. The reinforcing outer rail is wrapped outside the rear end of the upper slide rail and is fixedly connected between the seat frame side panel and the upper slide rail. The reinforcing inner rail is fixed to the vehicle floor. Although the aforementioned published literature increases the strength of the seat slide rail structure, it can also increase the modality of the seat and significantly improve the comfort of riding. However, it does not consider the problem of eliminating the internal gaps of the slide rail structure. Because gaps exist between the upper and lower slide rails in the actual use of long slide rails for vehicle seats, abnormal noises are easily generated during the operation or locking of the upper slide rail. Furthermore, the smoothness of sliding cannot be guaranteed, resulting in bumps and jerks. Existing technologies use separate plastic parts linked to the unlocking mechanism to eliminate these gaps. However, these linked plastic parts typically retract inwards during unlocking, causing internal noises during sliding and compromising operational stability. Moreover, over time, these plastic parts deform and wear, perpetuating the problems caused by the gaps. Additionally, existing long slide rail structures often feature complex upper slide rails with numerous connecting parts, resulting in low space utilization and an overall cluttered appearance. This spatial redundancy presents designers with a series of challenges in designing CNC mechanical transmission components.

[0004] In view of the aforementioned existing technology, it is necessary to make reasonable improvements to the existing long sliding rail structure for automobile seats. To this end, the applicant has made beneficial designs, and the technical solution described below arises from this background. Summary of the Invention

[0005] The objective of this invention is to provide a long slide rail for automotive seats with good gap elimination effect. This helps to set and optimize the gap elimination component structure between the fixed guide rail and the sliding guide rail, thereby ensuring that the gap between the two can be eliminated stably and reliably, thus realizing the smooth movement of the sliding guide rail and improving passenger comfort. It also helps to improve the overall structural integration by simplifying the internal structure of the sliding guide rail, thereby demonstrating the advantages of structural simplicity, ease of processing and manufacturing, and convenient assembly.

[0006] The present invention achieves its objective by providing a long slide rail for automotive seats with good backlash reduction effect. The slide rail includes a pair of fixed guide rails arranged in a parallel state, each opening upwards and having an inner cavity. A transmission screw is fixedly installed within each inner cavity. A pair of sliding guide rails are respectively disposed within the inner cavities of the two fixed guide rails and extend upwards from them, with each pair of sliding guide rails slidingly engaging with its corresponding fixed guide rail. A drive mechanism is disposed between the two sliding guide rails and enables overall movement of the sliding guide rails. The invention is characterized by further including four sliding seats, each fixedly connected to the vehicle seat frame, which are respectively engaged in pairs at the ends of the sliding guide rails. The sliding seats extend into the inner cavities of the fixed guide rails and slide with them. Two transmission screws pass through their respective sliding seats and are connected to them via transmission. Four backlash reduction components are arranged in pairs at the front and rear of the sliding guide rails, and each backlash reduction component includes… The device includes a gap-eliminating fixing component, a pair of gap-eliminating adjusting plates, a pair of adjusting rollers, and a pair of elastic elements. The gap-eliminating fixing component has a main body plate, which is housed within the sliding guide rail and extends downward beyond it. A pair of gap-eliminating fixing side positioning plates protrude outward from the lower part of the side panels of the main body plate. The pair of gap-eliminating adjusting plates are respectively located on the outer side of their respective corresponding gap-eliminating fixing side positioning plates and are hinged to them. The two adjusting rollers are rotatably connected to one end of the gap-eliminating adjusting plate along its length. At the other end of the gap-eliminating adjusting plate along its length, an elastic element stop plate is formed, which bends towards the gap-eliminating fixing component. The two elastic elements are respectively installed on the end of their respective corresponding gap-eliminating fixing side positioning plates away from the adjusting rollers along their length, with one end of each elastic element abutting against the elastic element stop plate. The adjusting rollers abut against the inner wall of the fixing guide rail under the elastic force of the elastic elements.

[0007] In a specific embodiment of the present invention, a fixed guide rail mounting plate is fixedly installed at the near end positions of both ends of the bottom of the fixed guide rail along the length direction. The fixed guide rail mounting plate has a plurality of fixed guide rail mounting plate connection holes for fastening connection with the vehicle floor.

[0008] In another specific embodiment of the present invention, each of the two fixed guide rails has a fixed guide rail opening groove extending along its length direction in the middle of its upward-facing surface, and a fixed guide rail protective strip is fixedly installed on the top panel of the fixed guide rail at a position corresponding to both sides of the fixed guide rail opening groove.

[0009] In another specific embodiment of the present invention, a pair of fixed guide rail side cavities are formed on both sides of the fixed guide rail inner cavity. The sliding guide rail includes a slide frame and a gearbox fixedly installed in the middle of the slide frame in the length direction. The slide frame and the gearbox are both inserted into the fixed guide rail inner cavity and protrude upward from the fixed guide rail. The gearbox is connected to the drive mechanism, and the transmission screw passes through the gearbox and is connected to the gear inside the gearbox. A sliding roller is connected to each side of the bottom of the sliding seat. The sliding roller is supported on the lower side wall of the fixed guide rail side cavity of the fixed guide rail and can slide back and forth. The adjusting roller abuts against the upper side wall surface of the fixed guide rail side cavity of the fixed guide rail.

[0010] In another specific embodiment of the present invention, the slide frame opens downward and has a slide frame cavity. The backlash elimination fixing member of the backlash elimination assembly is housed in the slide frame cavity and extends downward out of the slide frame. The sliding guide rail also includes a pair of guide frames connected to both sides of the gearbox. The pair of guide frames are located between the gearbox and the backlash elimination assembly. The pair of guide frames are also housed in the slide frame cavity and extend downward out of the slide frame. Slide frame flanges are formed by protruding outward on both sides of the bottom of the slide frame. A slide frame guide sleeve is fitted on the slide frame flange. The slide frame guide sleeve abuts against the upper side wall surface of the fixed guide rail side cavity of the fixed guide rail and achieves a sliding fit. A gearbox locking groove is formed at the middle position of the slide frame in the length direction. The gearbox is locked in the gearbox locking groove.

[0011] In another specific embodiment of the present invention, an inner rail frame is installed at the bottom of the inner cavity of the fixed guide rail. The left and right ends of the inner rail frame are bent inward to form a pair of inner rail frame mating edges. On both sides of the bottom of the sliding seat, and at positions corresponding to the mating edges of the inner rail frames on both sides, sliding seat mating edges are formed. The two sliding seat mating edges are respectively slidably engaged with their respective inner rail frame mating edges. On both sides of the bottom of the guide frame, and at positions corresponding to the mating edges of the inner rail frames on both sides, guide frame mating edges are also formed. The two guide frame mating edges are also slidably engaged with their respective inner rail frame mating edges.

[0012] In a further specific embodiment of the present invention, the drive mechanism includes a motor base, a motor fixedly installed in the motor base, and a motor shaft passing through the motor and housed in the motor base. The motor shaft is connected to the motor drive, and the two ends of the motor shaft in the length direction are respectively meshed with the gears inside the gearboxes on both sides. A motor base connecting plate is also fixedly installed at both ends of the motor base in the length direction. A slide frame connecting plate is fixedly installed on the slide frame and at a position corresponding to the upper part of the gearbox by fasteners. The two motor base connecting plates are respectively fixedly installed together with their respective corresponding slide frame connecting plates by fasteners.

[0013] In a further specific embodiment of the present invention, an oblique sliding seat fixing hole is provided at the upper end near the top end of the sliding seat. The sliding seat fixing hole passes through the sliding seat and can realize the fixed connection between the sliding seat and the vehicle seat.

[0014] In yet another specific embodiment of the present invention, a screw bearing seat is installed at both ends near the end of the inner cavity of the fixed guide rail along the length direction of the fixed guide rail. The two ends of the transmission screw are respectively rotatably disposed in the screw bearing seats on both sides and rotatably connected thereto, thereby realizing the installation and positioning of the transmission screw.

[0015] In yet another specific embodiment of the present invention, a hinge shaft is connected to the gap-eliminating adjustment plate of the gap-eliminating assembly at a position close to the adjusting roller along the length direction. The hinge shaft passes through the gap-eliminating adjustment plate and is connected to the positioning plate of the gap-eliminating fixing member, thereby realizing the hinge connection between the gap-eliminating adjustment plate and the gap-eliminating fixing member. An adjusting roller positioning shaft is installed at one end of the gap-eliminating adjustment plate along the length direction corresponding to the adjusting roller, and the adjusting roller is rotatably mounted on the adjusting roller positioning shaft.

[0016] The present invention, by adopting the above-described structure, has the following advantages: First, by setting the two backlash elimination components at the front and rear parts of the sliding guide rail and using the structure of adjusting rollers, backlash elimination adjustment plates, and elastic elements working together to tension them, the gap between the fixed guide rail and the sliding guide rail can be reliably eliminated by adjusting the rotation of the rollers, ensuring the smooth operation of the sliding guide rail, eliminating abnormal noises during operation, thereby effectively improving ride comfort and extending service life; Second, by optimizing the structure of the sliding guide rail's slide frame, the slide seat can be fitted at both ends of the slide frame, and the gearbox can also be fixed in the middle of the slide frame, greatly simplifying the internal structure of the sliding guide rail, demonstrating the advantages of compact structure, small size, and reliable operation, greatly reducing the number of parts, and facilitating assembly and manufacturing. Attached Figure Description

[0017] Figure 1This is a three-dimensional structural diagram of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 The diagram shows the assembly structure of the fixed guide rail, sliding seat, and backlash elimination assembly in the illustrated embodiment.

[0019] Figure 3 for Figure 1 An exploded three-dimensional view of the gap-eliminating component in the illustrated embodiment.

[0020] Figure 4 for Figure 1 The illustrated embodiment shows a schematic diagram of the slide bracket and the backlash elimination assembly.

[0021] In the diagram: 1. Fixed guide rail; 11. Fixed guide rail inner cavity; 111. Fixed guide rail side cavity; 12. Transmission screw; 13. Fixed guide rail mounting plate; 131. Fixed guide rail mounting plate connecting hole; 14. Fixed guide rail opening slot; 15. Fixed guide rail protective strip; 16. Inner rail frame; 161. Inner rail frame mating edge; 17. Screw bearing seat; 2. Sliding guide rail; 21. Slide frame; 211. Slide frame inner cavity; 212. Slide frame folded edge; 213. Slide frame guide sleeve; 214. Gearbox snap-fit ​​groove; 215. Slide frame connecting plate; 22. Gearbox. 23. Guide frame; 231. Guide frame mating edge; 3. Drive mechanism; 31. Motor base; 311. Motor base connecting plate; 32. Motor; 33. Motor shaft; 4. Sliding seat; 41. Sliding roller; 42. Sliding seat mating edge; 43. Sliding seat fixing hole; 5. Backlash elimination assembly; 51. Backlash elimination fastener; 511. Backlash elimination fastener main plate; 512. Backlash elimination fastener side positioning plate; 52. Backlash elimination adjustment plate; 521. Elastic element stop plate; 522. Hinge shaft; 523. Adjusting roller positioning shaft; 53. Adjusting roller; 54. Elastic element. Detailed Implementation

[0022] The applicant will provide a detailed description below with reference to the accompanying drawings and embodiments. However, the description of the embodiments is not intended to limit the scope of the present invention. Any formal but not substantive equivalent modifications made based on the concept of the present invention should be considered within the scope of the present invention.

[0023] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The context refers to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this invention.

[0024] Please see Figure 1 And please combine Figure 2 , Figure 3 and Figure 4This invention relates to a long slide rail for automotive seats with good gap-reducing effect, comprising a pair of fixed guide rails 1 fixedly connected to the vehicle floor and arranged in a parallel state, the pair of fixed guide rails 1 opening upward and having a fixed guide rail cavity 11, a transmission screw 12 extending along the length direction of the fixed guide rail 1 fixedly disposed in the fixed guide rail cavity 11; a pair of sliding guide rails 2 respectively passing through their respective fixed guide rail cavities 11 and protruding upward from the fixed guide rails 1, and the pair of sliding guide rails 2 slidingly engaging with their respective fixed guide rails 1; and a drive mechanism 3 disposed between the two sliding guide rails 2 and capable of realizing the overall movement of the sliding guide rails 2.

[0025] The key technical points of the technical solution provided by this invention are as follows: It also includes four sliding seats 4, each fixedly connected to the vehicle seat frame, which are respectively engaged at both ends of the sliding guide rail 2 in pairs. The aforementioned sliding seats 4 extend into the inner cavity 11 of the fixed guide rail and slide against it. The two aforementioned transmission screws 12 pass through their respective sliding seats 4 and are connected to them via transmission. Four sets of backlash elimination components 5 are respectively arranged in pairs at the front and rear parts of the sliding guide rail 2. Each backlash elimination component 5 includes a backlash elimination fixing member 51, a pair of backlash elimination adjusting plates 52, a pair of adjusting rollers 53, and a pair of elastic members 54. The aforementioned backlash elimination fixing member 51 has a backlash elimination fixing member main plate 511 with a "door" shaped cross-section. The backlash elimination fixing member main plate 511 is housed within the aforementioned sliding guide rail 2 and extends downwards out of the sliding guide rail 2. A pair of gap-eliminating fixing side positioning plates 512 are formed by protruding outwards from the lower part of the two side panels of the gap-eliminating fixing body plate 511. A pair of the aforementioned gap-eliminating adjustment plates 52 are respectively set at the outer side position of their respective gap-eliminating fixing side positioning plates 512 and are hinged together with them. Two of the aforementioned adjustment rollers 53 are respectively rotatably connected to one end position of the aforementioned gap-eliminating adjustment plate 52 in the length direction. At the other end position of the gap-eliminating adjustment plate 52 in the length direction, there is an elastic stop plate 521 that bends toward the gap-eliminating fixing member 51. Two elastic elements 54 are respectively installed on the end position of their respective gap-eliminating fixing side positioning plates 512 in the length direction away from the adjustment rollers 53, and one end of the aforementioned elastic element 54 abuts against the aforementioned elastic stop plate 521. The aforementioned adjustment rollers 53 abut against the inner side wall of the aforementioned fixed guide rail 1 under the elastic force of the elastic element 54.

[0026] In this embodiment, a fixed guide rail mounting plate 13 is fixedly installed at the near end positions of both ends of the bottom of the aforementioned fixed guide rail 1 along the length direction. The fixed guide rail mounting plate 13 is provided with a plurality of fixed guide rail mounting plate connection holes 131 for fastening connection with the vehicle floor.

[0027] Furthermore, each of the two aforementioned fixed guide rails 1 has a fixed guide rail opening groove 14 extending along its length direction in the middle of its upward-facing surface, and a fixed guide rail protective strip 15 is fixedly installed on the top panel of the aforementioned fixed guide rail 1 at a position corresponding to both sides of the fixed guide rail opening groove 14.

[0028] Please continue reading Figure 1 , Figure 2 and Figure 4 On both sides of the fixed guide rail inner cavity 11 of the aforementioned fixed guide rail 1, a pair of fixed guide rail side cavities 111 are formed. The aforementioned sliding guide rail 2 includes a slide frame 21 and a gearbox 22 fixedly installed in the middle of the slide frame 21 in the length direction. The aforementioned slide frame 21 and gearbox 22 are both inserted into the fixed guide rail inner cavity 11 and protrude upward from the aforementioned fixed guide rail 1. The gearbox 22 is connected to the aforementioned drive mechanism 3 for transmission. The aforementioned transmission screw 12 passes through the aforementioned gearbox 22 and is connected to the gear inside the gearbox 22 for transmission. On both sides of the bottom of the aforementioned sliding seat 4, a sliding roller 41 is connected. The aforementioned sliding roller 41 is supported on the lower side wall of the fixed guide rail side cavity 111 of the aforementioned fixed guide rail 1 and can slide back and forth. The aforementioned adjusting roller 53 abuts against the upper side wall surface of the fixed guide rail side cavity 111 of the aforementioned fixed guide rail 1.

[0029] Furthermore, the aforementioned slide frame 21 has an opening facing downwards and a slide frame cavity 211. The backlash elimination fixing member 511 of the aforementioned backlash elimination fixing member 51 is engaged and snapped into the slide frame cavity 211. The backlash elimination fixing member side positioning plates 512 on both sides of the lower part of the backlash elimination fixing member 51 protrude outwards from the aforementioned slide frame 21. The aforementioned sliding guide rail 2 also includes a pair of guide frames 23 connected to both sides of the aforementioned gearbox 22. The pair of guide frames 23 are located between the gearbox 22 and the backlash elimination assembly 5. The pair of guide frames 23 are also accommodated in the slide frame cavity 211 and protrude downwards from the aforementioned slide frame 21. On both sides of the bottom of the aforementioned slide frame 21 At each location, a slide frame flange 212 is formed by protruding outwards. A slide frame guide sleeve 213 is fitted onto the aforementioned slide frame flange 212. The slide frame guide sleeve 213 abuts against the upper side wall surface of the fixed guide rail side cavity 111 of the aforementioned fixed guide rail 1 and achieves a sliding fit. A gearbox locking groove 214 is formed at the middle position of the aforementioned slide frame 21 along its length. The aforementioned gearbox 22 is locked in the gearbox locking groove 214. The structure of the gearbox 22 being directly locked greatly simplifies the integration of the overall structure of the sliding guide rail 2, reduces the number of fasteners, and reflects the advantages of compact structure, small size and reliable operation.

[0030] In this embodiment, an inner rail frame 16 is installed at the bottom of the inner cavity 11 of the aforementioned fixed guide rail 1. The left and right ends of the inner rail frame 16 are bent inward to form a pair of inner rail frame mating edges 161. On both sides of the bottom of the aforementioned sliding seat 4, and at the positions corresponding to the inner rail frame mating edges 161, sliding seat mating edges 42 are formed by protruding outward. The two aforementioned sliding seat mating edges 42 are respectively slidably mated with their respective inner rail frame mating edges 161. On both sides of the bottom of the aforementioned guide frame 23, and at the positions corresponding to the inner rail frame mating edges 161, guide frame mating edges 231 are also formed by protruding outward. The two guide frame mating edges 231 are also slidably mated with their respective inner rail frame mating edges 161.

[0031] Please continue reading Figure 1 The aforementioned drive mechanism 3 includes a motor base 31, a motor 32 fixedly installed in the motor base 31, and a motor shaft 33 passing through the motor 32 and housed in the motor base 31. The aforementioned motor shaft 33 is connected to the motor 32 in a transmission manner, and the two ends of the motor shaft 33 in the length direction are respectively engaged with the gears inside the gearboxes 22 on both sides. The transmission connection method between the gearboxes 22 and the motor shaft 33 is prior art and will not be described in detail here. A motor base connecting plate 311 is also fixedly installed at both ends of the aforementioned motor base 31 in the length direction. A slide frame connecting plate 215 is fixedly installed on the aforementioned slide frame 21 and at the position corresponding to the upper part of the gearbox 22 by fasteners. The two motor base connecting plates 311 are respectively fixedly installed together with their respective corresponding slide frame connecting plates 215 by fasteners.

[0032] In this embodiment, an oblique sliding seat fixing hole 43 is provided at the upper end near the top end of the aforementioned sliding seat 4. The sliding seat fixing hole 43 passes through the aforementioned sliding seat 4 and can realize the fixed connection between the sliding seat 4 and the vehicle seat.

[0033] Preferably, a screw bearing seat 17 is installed at both ends of the fixed guide rail cavity 11 along the length direction of the aforementioned fixed guide rail 1, near the end position. The two ends of the aforementioned transmission screw 12 are respectively rotatably disposed in the screw bearing seats 17 on both sides and rotatably connected thereto, thereby realizing the installation and positioning of the transmission screw 12.

[0034] Please pay close attention. Figure 3A hinge shaft 522 is connected to the gap-reducing adjustment plate 52 of the aforementioned gap-reducing component 5 at a position close to the adjusting roller 53 along the length direction of the plate. The hinge shaft 522 passes through the gap-reducing adjustment plate 52 and is connected to the aforementioned gap-reducing fixing member side positioning plate 512, thereby realizing the hinge connection between the gap-reducing adjustment plate 52 and the gap-reducing fixing member 51. An adjusting roller positioning shaft 523 is installed at one end of the aforementioned gap-reducing adjustment plate 52 along the length direction corresponding to the aforementioned adjusting roller 53. The aforementioned adjusting roller 53 is rotatably mounted on the adjusting roller positioning shaft 523.

[0035] Please see Figure 1 and combined Figure 2 , Figure 3 and Figure 4 The applicant briefly describes the working principle of the technical solution provided by the present invention: Two fixed guide rails 2 are fixedly installed on the vehicle floor through a fixed guide rail mounting plate 13, and the vehicle seat is placed above the two sliding guide rails 2 and fixedly connected to the corresponding sliding seat fixing hole 43 on the sliding seat 4 by fasteners. When the driver and passengers move the vehicle seat back and forth according to actual riding needs, the motor 32 is started by operating an external control device. The motor 32 drives the motor shaft 33 to rotate, and the motor shaft 33 further drives the gears inside the gearboxes 22 on both sides to rotate, thereby realizing the rotation of the screw 12. Finally, the sliding seat 4 and the sliding guide rail 2 move back and forth, and thus the vehicle seat moves back and forth. During the back-and-forth sliding of the sliding guide rail 2 and the sliding seat 4, due to the elastic action of the elastic element 54, the adjusting roller 53 connected to one end of the adjusting plate 52 always maintains an upward flipping trend and closely abuts against the inner wall of the fixed guide rail 1, thus exerting an upward lifting force. When the fixed guide rail 1 deforms or the surface of the adjusting roller 53 wears, the adjusting roller 53 can also eliminate the deformation of the inner wall of the fixed guide rail 1 or compensate for the gap caused by its own wear under the elastic force of the elastic element 54, thereby effectively ensuring that the gap between the fixed guide rail 1 and the sliding guide rail 2 is effectively eliminated, making the sliding guide rail 2 and the sliding seat 4 slide more smoothly and reducing abnormal noise, thereby improving passenger comfort.

[0036] In summary, the technical solution provided by this invention makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above-mentioned technical effects column.

Claims

1. A long slide rail for a car seat with good gap elimination effect, comprising a pair of fixed guide rails (1) arranged in a parallel state, the pair of fixed guide rails (1) opening upward and having a fixed guide rail cavity (11), a transmission screw (12) fixedly arranged in the fixed guide rail cavity (11); a pair of sliding guide rails (2), respectively arranged in the two fixed guide rail cavities (11) and extending upward out of the fixed guide rails (1), and the pair of sliding guide rails (2) slidingly engaging with their respective fixed guide rails (1); a drive mechanism (3), arranged between the two sliding guide rails (2) and capable of realizing the overall movement of the sliding guide rails (2); characterized in that, It also includes four sliding seats (4) that are fixedly connected to the vehicle seat frame, which are respectively engaged at the two ends of the sliding guide rail (2) in pairs. The sliding seats (4) extend into the inner cavity (11) of the fixed guide rail and slide with the fixed guide rail (1). The two transmission screws (12) pass through their respective sliding seats (4) and are connected to them in a transmission manner. Four sets of backlash elimination components (5) are respectively arranged in pairs at the front and rear parts of the sliding guide rail (2). Each backlash elimination component (5) includes a backlash elimination fixing member (51), a pair of backlash elimination adjusting plates (52), a pair of adjusting rollers (53) and a pair of elastic members (54). The backlash elimination fixing member (51) has a backlash elimination fixing member main plate (511). The backlash elimination fixing member main plate (511) is housed in the sliding guide rail (2) and extends downward out of the sliding guide rail (2). The lower part of the two side panels protrudes outward to form a pair of gap-eliminating fixing side positioning plates (512). A pair of gap-eliminating adjustment plates (52) are respectively set at the outer side position of their respective gap-eliminating fixing side positioning plates (512) and hinged together with them. Two adjustment rollers (53) are respectively rotatably connected to one end position of the gap-eliminating adjustment plate (52) in the length direction. At the other end of the gap-eliminating adjustment plate (52) in the length direction, there is an elastic stop plate (521) bent towards the gap-eliminating fixing member (51). Two elastic members (54) are respectively installed on the end of their respective gap-eliminating fixing side positioning plates (512) in the length direction away from the adjustment rollers (53). One end of the elastic member (54) abuts against the elastic stop plate (521), and the adjustment roller (53) abuts against the inner wall of the fixed guide rail (1) under the elastic force of the elastic member (54). A hinge shaft (522) is connected to the gap-reducing adjustment plate (52) of the gap-reducing assembly (5) at a position close to the adjusting roller (53) along the length direction of the plate. The hinge shaft (522) passes through the gap-reducing adjustment plate (52) and is connected to the gap-reducing fixing member side positioning plate (512) to achieve the hinge connection between the gap-reducing adjustment plate (52) and the gap-reducing fixing member (51). An adjusting roller positioning shaft (523) is installed at one end of the gap-reducing adjustment plate (52) along the length direction corresponding to the adjusting roller (53). The adjusting roller (53) is rotatably mounted on the adjusting roller positioning shaft (523).

2. The long slide rail for automobile seats with good gap elimination effect according to claim 1, characterized in that... A fixed guide rail mounting plate (13) is fixedly installed at both ends near the bottom of the fixed guide rail (1) along the length direction. The fixed guide rail mounting plate (13) has multiple fixed guide rail mounting plate connection holes (131) for fastening to the vehicle floor.

3. The long slide rail for automobile seats with good gap elimination effect according to claim 1, characterized in that... Each of the two fixed guide rails (1) has a fixed guide rail opening groove (14) extending along its length in the middle of the surface facing upward, and a fixed guide rail protective strip (15) is fixedly installed on the top panel of the fixed guide rail (1) at a position corresponding to both sides of the fixed guide rail opening groove (14).

4. The long slide rail for automobile seats with good gap elimination effect according to claim 1, characterized in that... On both sides of the fixed guide rail inner cavity (11) of the fixed guide rail (1), a pair of fixed guide rail side cavities (111) are also formed. The sliding guide rail (2) includes a slide frame (21) and a gearbox (22) fixedly installed in the middle of the slide frame (21) in the length direction. The slide frame (21) and the gearbox (22) are both inserted into the fixed guide rail inner cavity (11) and protrude upward from the fixed guide rail (1). The gearbox (22) is connected to the drive mechanism (3) for transmission. The moving screw (12) passes through the gearbox (22) and is connected to the gear inside the gearbox (22) for transmission. A sliding roller (41) is connected to each side of the bottom of the sliding seat (4). The sliding roller (41) is supported on the lower side wall of the fixed guide side cavity (111) of the fixed guide rail (1) and can slide back and forth. The adjusting roller (53) abuts against the upper side wall surface of the fixed guide side cavity (111) of the fixed guide rail (1).

5. The long slide rail for automobile seats with good gap elimination effect according to claim 4, characterized in that... The slide frame (21) has an opening facing downwards and a slide frame cavity (211). The backlash elimination component (5) of the backlash elimination assembly (5) is housed in the slide frame cavity (211) and extends downwards out of the slide frame (21). The sliding guide rail (2) also includes a pair of guide frames (23) connected to both sides of the gearbox (22). The pair of guide frames (23) are located between the gearbox (22) and the backlash elimination assembly (5). The pair of guide frames (23) are also housed in the slide frame cavity (211) and extend downwards out of the slide frame. 21), and a slide frame flange (212) is formed on both sides of the bottom of the slide frame (21). A slide frame guide sleeve (213) is fitted on the slide frame flange (212). The slide frame guide sleeve (213) abuts against the upper side wall surface of the fixed guide rail side cavity (111) of the fixed guide rail (1) and achieves sliding fit. A gearbox locking groove (214) is formed at the middle position of the slide frame (21) in the length direction. The gearbox (22) is locked in the gearbox locking groove (214).

6. The long slide rail for automobile seats with good gap elimination effect according to claim 5, characterized in that... An inner rail frame (16) is installed at the bottom of the inner cavity (11) of the fixed guide rail (1). The left and right ends of the inner rail frame (16) are bent inward to form a pair of inner rail frame mating edges (161) along the length direction. On both sides of the bottom of the sliding seat (4) and at the positions corresponding to the inner rail frame mating edges (161) on both sides, sliding seat mating edges (42) are formed. The two sliding seat mating edges (42) are respectively slidably mated with their respective inner rail frame mating edges (161). On both sides of the bottom of the guide frame (23) and at the positions corresponding to the inner rail frame mating edges (161) on both sides, guide frame mating edges (231) are also formed. The two guide frame mating edges (231) are also slidably mated with their respective inner rail frame mating edges (161).

7. A long slide rail for automotive seats with good gap elimination effect according to claim 5, characterized in that... The drive mechanism (3) includes a motor base (31), a motor (32) fixedly installed in the motor base (31), and a motor shaft (33) passing through the motor (32) and housed in the motor base (31). The motor shaft (33) is connected to the motor (32) in a transmission manner, and the two ends of the motor shaft (33) in the length direction are respectively meshed with the gears inside the gearboxes (22) on both sides. A motor base connecting plate (311) is also fixedly installed at both ends of the motor base (31) in the length direction. A slide frame connecting plate (215) is fixedly installed on the slide frame (21) and at the position corresponding to the upper part of the gearbox (22) by fasteners. The two motor base connecting plates (311) are respectively fixedly installed together with their respective corresponding slide frame connecting plates (215) by fasteners.

8. The long slide rail for automobile seats with good gap elimination effect according to claim 1, characterized in that... An oblique sliding seat fixing hole (43) is provided at the upper end near the top end of the sliding seat (4). The sliding seat fixing hole (43) passes through the sliding seat (4) and can realize the fixed connection between the sliding seat (4) and the vehicle seat.

9. A long slide rail for automotive seats with good gap elimination effect according to claim 1, characterized in that... A screw bearing seat (17) is installed at both ends of the fixed guide rail cavity (11) in the length direction of the fixed guide rail (1). The two ends of the transmission screw (12) are respectively rotatably set in the screw bearing seats (17) on both sides and rotatably connected to them, thereby realizing the installation and positioning of the transmission screw (12).

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