CN217892570U - Anti-backlash device for long slide rail of vehicle seat - Google Patents

Abstract

A gap eliminating device for a long slide rail of a vehicle seat belongs to the technical field of vehicle spare and accessory parts. The long slide rail of the vehicle seat comprises a pair of lower rails, the pair of lower rails are provided with upward openings and lower rail inner cavities, and transmission screw rods are arranged in the lower rail inner cavities; the pair of upper slide rails are respectively arranged in the inner cavities of the two lower rails; the driving mechanism is arranged between the two upper sliding rails; the four sliding seats are fixedly connected with the seat frame of the vehicle seat; the method is characterized in that: the gap eliminating device comprises four groups of gap eliminating mechanisms capable of eliminating gaps between the lower rail and the upper rail, the four groups of gap eliminating mechanisms are respectively arranged at the front part and the rear part of the upper rail in a two-in-one state and correspond to the positions between the lower rail and the upper rail, each gap eliminating mechanism comprises a main body part, a pair of gap eliminating adjusting plates and a pair of adjusting rollers, and the pair of elastic parts abut against the gap eliminating adjusting plates and exert elastic force on the adjusting rollers. The advantages are that: the stability of the upper sliding rail in operation is ensured, abnormal sound is prevented from being generated in operation, the riding comfort is improved, and the service life is prolonged.

Description

Anti-backlash device for long slide rail of vehicle seat

Technical Field

The utility model belongs to the technical field of the vehicle accessories, concretely relates to long slide rail of vehicle seat is with eliminating crack device.

Background

With the rapid improvement of the living standard of people and the continuous progress of science and technology, the development of the automobile industry is rapidly advanced, and the requirements of people on the quality and the comfort level of the automobile are continuously improved. As one of the important components of an automobile, the excellent seat design can bring comfortable seating experience to passengers, and different types of vehicles have different requirements on the seats, and for some household trolleys with smaller space and low requirement on comfort, two seats which can move back and forth in the front row and can adjust the angle of a seat back and a seat which takes a fixed structure in the rear row are mostly adopted; for some commercial vehicles with larger space and higher requirement on comfort level, the utility model has the functions of backrest adjustment, forward and backward movement, vertical lifting, seat rotation and the like, so as to facilitate the passengers to enter and sit comfortably; along with the continuous improvement of the intelligent level of the automobile industry and the rapid development of the unmanned technology, the requirement on the back-and-forth movement distance of the automobile seat is higher and higher, namely the back-and-forth movement distance of the automobile seat is required to be longer, so that the space in the automobile is more flexible and changeable, the movement of passengers is facilitated, and the comfort level and the space utilization rate of a user are greatly improved, so that the automobile seat and the long slide rail structure which are originally only present in some large-scale luxury commercial vehicles and can move back and forth in a long distance are also more important to be concerned in the research and development of the current intelligent automobile.

With the progress of science and technology, the front and back adjustment mode of the vehicle seat is gradually popularized from manual sliding to electric sliding; the existing long slide rail of the electric vehicle seat usually comprises an upper slide rail, a lower slide rail and a driving mechanism, wherein the upper slide rail is connected with a slide seat fixed with a framework of the vehicle seat, the upper slide rail is wrapped in the lower slide rail and can slide relative to the lower slide rail, the lower slide rail is fixed on the floor of a vehicle body, and the driving mechanism drives the upper slide rail to move back and forth to drive the slide seat and the seat to move together; however, in the practical use process of the long slide rail, there is a problem that a gap exists between the upper slide rail and the lower slide rail, abnormal sound is easily generated in the process of operation or locking of the upper slide rail, and meanwhile, smoothness of sliding cannot be guaranteed, so that bumping and shifting can occur.

In view of the above-mentioned prior art, there is a need for a reasonable improvement of the gap eliminating device of the long slide rail for the car seat. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

SUMMERY OF THE UTILITY MODEL

The task of the utility model is to provide a structure is succinct, reliably durable, the installation of being convenient for, thereby help setting up between lower rail and last slide rail and realize through the elastic component that the adjustment gyro wheel remains the trend of upwards overturning throughout will lower rail and go up the reliable stable elimination in clearance between the slide rail to the smooth movement of slide rail realizes promoting the vehicle seat of passenger's riding comfort from this and uses the gap eliminating device.

The task of the utility model is accomplished in this way, a gap eliminating device for a long slide rail of a vehicle seat, the long slide rail of the vehicle seat comprises a pair of lower rails, the openings of the pair of lower rails are upward and provided with lower rail inner cavities, and a transmission screw rod is fixedly arranged in the lower rail inner cavities; the pair of upper slide rails are respectively arranged in the inner cavities of the two lower rails and are in sliding fit with the corresponding lower rails; the driving mechanism is arranged between the two upper sliding rails and can realize the integral motion of the upper sliding rails; the four sliding seats are fixedly connected with the seat frame of the vehicle seat and are respectively connected with the end parts of the two ends of the upper sliding rail in a mode of grouping two by two, the four sliding seats are in sliding fit with the lower rail, and the two transmission screw rods penetrate through the corresponding sliding seats and are in transmission connection with the corresponding sliding seats; is characterized in that: the gap eliminating device comprises four groups of gap eliminating mechanisms capable of eliminating gaps between a lower rail and an upper rail, the four groups of gap eliminating mechanisms are arranged at the front part and the rear part of the upper rail in a pairwise mode and correspond to the positions between the lower rail and the upper rail, each gap eliminating mechanism comprises a main body part, a pair of gap eliminating adjusting plates and a pair of adjusting rollers, the main body part is arranged in the upper rail and extends out of the upper rail downwards, the two gap eliminating adjusting plates are hinged to the outer sides of the main body part, the two adjusting rollers are connected to one end part of the gap eliminating adjusting plates in the length direction respectively, elastic parts abutting against the gap eliminating adjusting plates are connected to the positions of the other end parts of the left side and the right side of the main body part in the length direction corresponding to the gap eliminating adjusting plates respectively, and the adjusting rollers abut against the inner side wall of the lower rail under the elastic force of the elastic parts.

In a specific embodiment of the present invention, the main body of the anti-backlash mechanism comprises a main body plate, which is accommodated in the upper slide rail and protrudes downward from the upper slide rail, a pair of side positioning plates is formed by protruding the lower portions of the two side plates of the main body plate, a pair of anti-backlash adjusting plates are respectively disposed at the outer positions of the respective side positioning plates, and a hinge shaft is connected to the positions of the anti-backlash adjusting plates, which are close to the adjusting rollers, in the length direction of the plate body, and the hinge shaft passes through the plate body of the anti-backlash adjusting plate and then is connected to the side positioning plates, so as to realize the hinge joint between the anti-backlash adjusting plate and the main body, and an adjusting roller positioning shaft is installed at the end position of the anti-backlash adjusting plate in the length direction, which corresponds to the adjusting rollers, and the adjusting rollers are rotatably sleeved on the adjusting roller positioning shaft; and the other end part of the anti-backlash adjusting plate in the length direction forms an elastic part stop plate bent towards the main body part, the two elastic parts are respectively arranged on the end parts, far away from the adjusting roller, of the side positioning plates corresponding to the elastic parts in the length direction, and one end of each elastic part abuts against the elastic part stop plate, so that the anti-backlash adjusting plate is under the elastic action of the elastic parts, and the adjusting roller abuts against the inner side wall of the lower rail under the elastic action of the elastic parts.

In another specific embodiment of the present invention, a lower rail mounting plate is respectively and fixedly mounted at the proximal end positions of both ends of the length direction of the bottom of the lower rail, and a plurality of lower rail mounting plate connecting holes for connecting with the vehicle floor are formed in the lower rail mounting plate.

In another specific embodiment of the present invention, two lower rails are provided with a lower rail opening groove extending along the length direction thereof at the middle portion of the upper side surface, and a lower rail protection strip is fixedly installed on the top panel of the lower rail at a position corresponding to both sides of the lower rail opening groove.

In another specific embodiment of the present invention, a pair of lower rail side cavities are further formed on two sides of the lower rail inner cavity of the lower rail, the upper slide rail includes a slide carriage frame and a gear box fixedly installed in the middle of the slide carriage frame in the length direction, the slide carriage frame and the gear box are both inserted into the lower rail inner cavity and extend upwards out of the lower rail, the gear box is in transmission connection with the driving mechanism, and the transmission screw passes through the gear box and is in transmission connection with a gear inside the gear box; and two sides of the bottom of the sliding seat are respectively connected with a sliding roller, the sliding rollers are supported on the lower side wall of the lower rail side cavity of the lower rail and can slide back and forth in a reciprocating manner, and the adjusting rollers are abutted with the upper side wall surface of the lower rail side cavity of the lower rail.

In still another embodiment of the present invention, the sliding seat frame has a downward opening and has a sliding seat frame inner cavity, and the main body of the anti-backlash mechanism is accommodated in the sliding seat frame inner cavity and extends downward out of the sliding seat frame; the upper sliding rail also comprises a pair of guide frames connected to two sides of the gear box, the pair of guide frames are arranged at positions between the gear box and the gap eliminating mechanism, the pair of guide frames are also accommodated in the inner cavity of the sliding seat frame and extend out of the sliding seat frame downwards, two sides of the bottom of the sliding seat frame are respectively provided with a sliding seat frame folding edge in an outwards protruding mode, a sliding seat frame guide sleeve is sleeved on the sliding seat frame folding edge, and the sliding seat frame guide sleeve is abutted with the upper side wall surface of the lower rail side cavity of the lower rail and is in sliding fit with the upper side wall surface of the lower rail side cavity of the lower rail; the sliding seat is characterized in that a gear box clamping groove is formed in the middle of the sliding seat frame in the length direction, the gear box is clamped in the gear box clamping groove, a pair of sliding seat matching plates are further formed at the end portions of the two ends of the sliding seat frame in the length direction, sliding seat connecting portions are formed on the sliding seat and in positions corresponding to the sliding seat matching plates, and the sliding seat connecting portions are connected with the corresponding sliding seat matching plates in a matching mode.

The utility model discloses a further a concrete embodiment an interior track frame is installed to the bottom of the lower rail inner chamber of lower rail, and both ends inwards bend and constitute about this interior track frame length direction and have a pair of interior track frame cooperation limit, and slide base bottom both sides and outwards protruding the establishing of position department corresponding to both sides interior track frame cooperation limit have slide base cooperation limit, two slide base cooperation limit realizes sliding fit with the interior track frame cooperation limit that corresponds separately slide base bottom both sides and the same outwards protruding establishing of position department corresponding to both sides interior track frame cooperation limit have a leading truck cooperation limit, and two leading truck cooperation limits realize sliding fit with the interior track frame cooperation limit that corresponds separately.

The utility model discloses a further a concrete embodiment, actuating mechanism includes a motor cabinet, a fixed mounting motor in the motor cabinet and a motor shaft that passes the motor and hold in the motor cabinet, the motor shaft links together with motor drive and this motor shaft length direction's both ends tip respectively with the gear drive meshing of the gear box inside of both sides be in the same place motor cabinet length direction's both ends tip still equal fixed mounting has a motor cabinet connecting plate on the saddle frame and in the position department of locating through fastener fixed mounting corresponding to gear box upper portion, two motor cabinet connecting plates pass through fastener fixed mounting with the saddle frame connecting plate that corresponds separately and are in the same place respectively.

In yet another specific embodiment of the present invention, a slant sliding seat fixing hole is disposed at a position near the top end of the upper end of the sliding seat, and the sliding seat fixing hole penetrates through the sliding seat and can realize the fixed connection between the sliding seat and the vehicle seat.

In yet another specific embodiment of the present invention, a screw bearing seat is installed at the position of the proximal end portion of the two ends of the lower rail inner cavity in the length direction of the lower rail, and the ends of the two ends of the driving screw are rotatably installed in the screw bearing seats of the two sides and rotatably connected therewith, so as to realize the installation and positioning of the driving screw.

The utility model adopts the above structure after, the advantage that has: the four groups of gap eliminating mechanisms are respectively arranged at the front part and the rear part of the upper sliding rail on the two sides, and form a mutually matched and tensioned structure by virtue of the adjusting rollers, the gap eliminating adjusting plates and the elastic pieces, finally, the adjusting rollers always keep the upward overturning trend by virtue of the elastic force action of the elastic pieces, and the adjusting rollers are tightly abutted against the inner wall of the lower rail so as to provide lifting force for the lower rail, so that the gap between the lower rail and the upper sliding rail is reliably eliminated, the running stability of the upper sliding rail is ensured, abnormal sound is prevented from being generated during running, the riding comfort is effectively improved, the service life is prolonged, and the use experience is greatly optimized.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is an exploded perspective view of the anti-backlash mechanism of the embodiment shown in fig. 1.

Fig. 3 is a schematic plan view of a connection structure of the lower rail and the upper rail in the embodiment shown in fig. 1.

Fig. 4 is a schematic plan view of a connecting structure of the carriage and the anti-backlash mechanism in the embodiment shown in fig. 1.

In the figure: 1. the structure comprises a lower rail, 11 lower rail inner cavities, 111 lower rail side cavities, 12 transmission screws, 13 lower rail mounting plates, 131 lower rail mounting plate connecting holes, 14 lower rail open slots, 15 lower rail protection strips, 16 inner rail frames, 161 inner rail frame matching edges and 17 screw bearing seats; 2. the sliding seat comprises an upper sliding rail, 21 sliding seat frames, 211 sliding seat frame inner cavities, 212 sliding seat frame folding edges, 213 sliding seat frame guide sleeves, 214 gear box clamping grooves, 215 sliding seat frame connecting plates, 216 sliding seat matching plates, 22 gear boxes, 23 guide frames and 231 guide frame matching edges; 3. the driving mechanism, 31, motor base, 311, motor base connecting plate, 32, motor, 33, motor shaft; 4. a sliding seat, 41 sliding rollers, 42 sliding seat matching edges, 43 sliding seat fixing holes and 44 sliding seat connecting parts; 5. the backlash eliminating mechanism 51, the main body piece 511, the main body plate 512, the side positioning plate 52, the backlash eliminating adjusting plate 521, the elastic piece stop plate 522, the hinge shaft 523, the adjusting roller positioning shaft 53, the adjusting roller 54 and the elastic piece.

Detailed Description

The applicant shall now make the following detailed description, given by way of example and without any limitation to the solution of the present invention, with reference to the accompanying drawings, and any equivalent changes, given in the form only and not in material terms, which are made according to the inventive concept shall be considered as the scope of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and back are given with respect to the position state of fig. 1, and thus should not be interpreted as limiting the technical solution provided by the present invention.

Referring to fig. 1 and fig. 2, 3 and 4, a gap eliminating device for a long slide rail of a vehicle seat is shown, the long slide rail of the vehicle seat comprises a pair of lower rails 1 arranged in parallel, the pair of lower rails 1 has an upward opening and a lower rail inner cavity 11, and a transmission screw 12 is fixedly arranged in the lower rail inner cavity 11; the pair of upper slide rails 2 are respectively arranged in the two lower rail inner cavities 11 and extend out of the lower rails 1 upwards, and the pair of upper slide rails 2 are in sliding fit with the corresponding lower rails 1 respectively; the driving mechanism 3 is arranged between the two upper slide rails 2 and can realize the integral motion of the upper slide rails 2; the four sliding seats 4 are fixedly connected with the seat frame of the vehicle seat and are respectively connected with the end parts of the two ends of the upper sliding rail 2 in a mode of being grouped in pairs, the four sliding seats 4 are in sliding fit with the lower rail 1, and the two transmission screw rods 12 penetrate through the corresponding sliding seats 4 and are in transmission connection with the corresponding sliding seats 4.

As the technical scheme provided by the utility model: the gap eliminating device comprises four groups of gap eliminating mechanisms 5 capable of eliminating the gap between the lower rail 1 and the upper rail 2, the four groups of gap eliminating mechanisms 5 are respectively arranged at the front part and the rear part of the upper rail 2 in a two-by-two state and correspond to the position between the lower rail 1 and the upper rail 2, each gap eliminating mechanism 5 comprises a main body piece 51, a pair of gap eliminating adjusting plates 52 and a pair of adjusting rollers 53, the main body piece 51 is arranged in the upper rail 2 and extends out of the upper rail 2 downwards, the two gap eliminating adjusting plates 52 are hinged at the outer side of the main body piece 51, the two adjusting rollers 53 are respectively connected at one end part of the gap eliminating adjusting plates 52 in the length direction, elastic pieces 54 abutting against the gap eliminating adjusting plates 52 are respectively connected at the positions of the other end parts of the left side and the right side of the main body piece 51 corresponding to the length direction of the gap eliminating adjusting plates 52, and the adjusting rollers 53 abut against the inner side wall of the lower rail 1 under the elastic force of the elastic pieces 54.

In this embodiment, the main body 51 of the anti-backlash mechanism 5 has a main body plate 511 with a cross-section having a "door" -shaped configuration, the main body plate 511 is accommodated in the upper slide rail 2 and extends out of the upper slide rail 2, a pair of side positioning plates 512 are formed by outwardly protruding lower portions of two side plates of the main body plate 511, and a pair of the anti-backlash adjusting plates 52 are respectively disposed at outer positions of the corresponding side positioning plates 512; an elastic member stop plate 521 bent toward the main body 51 is formed at one end of the gap eliminating adjustment plate 52 in the length direction, a hinge shaft 522 is connected to a position of the gap eliminating adjustment plate 52 in the length direction near the adjustment roller 53, the hinge shaft 522 penetrates through the plate of the gap eliminating adjustment plate 52 and is connected to the side positioning plate 512, thereby realizing the hinge joint of the gap eliminating adjustment plate 52 and the main body 51, an adjustment roller positioning shaft 523 is installed at an end of the gap eliminating adjustment plate 52 in the length direction corresponding to the adjustment roller 53, the adjustment roller 53 is rotatably sleeved on the adjustment roller positioning shaft 523, two elastic members 54 are respectively installed at one end of the corresponding side positioning plate 512 away from the adjustment roller 53 in the length direction, and one end of the elastic member 54 abuts against the elastic member stop plate 521, so that the gap eliminating adjustment plate 52 receives the elastic force of the elastic member 54 and the adjustment roller 53 abuts against the inner side wall of the lower rail 1 under the elastic force of the elastic member 54.

Further, a lower rail mounting plate 13 is fixedly mounted at the proximal end positions of both ends in the length direction of the bottom of the lower rail 1, and a plurality of lower rail mounting plate connecting holes 131 for connecting with the vehicle floor are formed in the lower rail mounting plate 13.

Further, the two lower rails 1 are provided at the middle portions thereof facing the upper side surfaces thereof with lower rail opening grooves 14 extending in the length direction thereof, and a lower rail protection bar 15 is fixedly installed on the top panel of the lower rail 1 at positions corresponding to both sides of the lower rail opening grooves 14.

Please refer to fig. 1 and fig. 3, a pair of lower rail side cavities 111 are formed on two sides of the lower rail inner cavity 11 of the lower rail 1, the upper slide rail 2 includes a slide carriage frame 21 and a gear box 22 fixedly installed at the middle part of the slide carriage frame 21 in the length direction, the slide carriage frame 21 and the gear box 22 are both inserted into the lower rail inner cavity 11 and extend out of the lower rail 1, the gear box 22 is in transmission connection with the driving mechanism 3, and the transmission screw 12 passes through the gear box 22 and is in transmission connection with a gear inside the gear box 22; and 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 sidewall of the lower rail side cavity 111 of the lower rail 1 and can slide back and forth, and the adjusting roller 53 abuts against the upper sidewall surface of the lower rail side cavity 111 of the lower rail 1.

In the present embodiment, the sliding seat frame 21 has a downward opening and a sliding seat frame inner cavity 211, and the main body 51 of the anti-backlash mechanism 5 is accommodated in the sliding seat frame inner cavity 211 and extends downward beyond the sliding seat frame 21; the upper sliding rail 2 further comprises a pair of guiding frames 23 connected to two sides of the gear box 22, the pair of guiding frames 23 are disposed at a position between the gear box 22 and the anti-backlash mechanism 5, the pair of guiding frames 23 are also accommodated in the inner cavity 211 of the sliding frame and extend downwards out of the sliding frame 21, sliding frame folding edges 212 are formed at two sides of the bottom of the sliding frame 21 in an outward protruding manner, a sliding frame guiding sleeve 213 is sleeved on the sliding frame folding edges 212, and the sliding frame guiding sleeve 213 abuts against the upper side wall surface of the lower rail side cavity 111 of the lower rail 1 and is in sliding fit with the upper side wall surface; a gear box clamping groove 214 is formed in the middle of the sliding seat frame 21 in the length direction, the gear box 22 is clamped in the gear box clamping groove 214, a pair of sliding seat matching plates 216 are further formed at the two end parts of the sliding seat frame 21 in the length direction, sliding seat connecting parts 44 are formed on the sliding seat 4 and in the positions corresponding to the sliding seat matching plates 216, and the sliding seat connecting parts 44 are connected with the corresponding sliding seat matching plates 216 in a matching manner; the direct clamping structure of the gear box 22 and the matching structure of the sliding seat 4 greatly simplify the integration level of the whole structure of the upper sliding rail 2, reduce the number of fasteners and realize the advantages of compact structure, small volume and reliable operation.

Further, an inner rail frame 16 is installed at the bottom of the inner cavity 11 of the lower rail 1, a pair of inner rail frame matching edges 161 are formed by bending inward the left and right ends of the inner rail frame 16 in the length direction, a sliding seat matching edge 42 is formed by protruding outward at the positions corresponding to the inner rail frame matching edges 161 at both sides of the bottom of the sliding seat 4, the two sliding seat matching edges 42 are respectively in sliding fit with the corresponding inner rail frame matching edges 161, a guide frame matching edge 231 is formed by protruding outward at the positions corresponding to the inner rail frame matching edges 161 at both sides of the bottom of the guide frame 23, and the two guide frame matching edges 231 are also in sliding fit with the corresponding inner rail frame matching edges 161.

Referring to fig. 1, the driving 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 accommodated in the motor base 31, the motor shaft 33 is connected to the motor 32 in a transmission manner, and both ends of the motor shaft 33 in the length direction are respectively engaged with the gears inside the gear boxes 22 at both sides in a transmission manner, a motor base connecting plate 311 is fixedly installed at both ends of the motor base 31 in the length direction, a carriage frame connecting plate 215 is fixedly installed on the carriage frame 21 and at a position corresponding to the upper portion of the gear box 22 by a fastening member, and the two motor base connecting plates 311 are respectively and fixedly installed with the respective corresponding carriage frame connecting plates 215 by a fastening member.

Furthermore, an inclined sliding seat fixing hole 43 is formed at a position near the top end of the upper end of the sliding seat 4, and the sliding seat fixing hole 43 penetrates through the sliding seat 4 and can realize the fixed connection of the sliding seat 4 and the vehicle seat.

Further, a screw bearing seat 17 is installed at the proximal end position of each of the two ends in the length direction of the lower rail inner cavity 11 of the lower rail 1, and the two ends of the transmission screw 12 are respectively and rotatably installed in the screw bearing seats 17 at the two sides and rotatably connected with the screw bearing seats, so that the installation and positioning of the transmission screw 12 are realized.

Referring to fig. 1 in conjunction with fig. 2 and fig. 3, the applicant briefly describes the working principle of the technical solution provided by the present invention: the two lower rails 1 are fixedly mounted on the vehicle floor through the lower rail mounting plates 13, and the vehicle seat is placed above the two upper slide rails 2 and is fixedly connected with the corresponding slide seat fixing holes 43 on the slide seat 4 through fasteners. When a vehicle occupant moves the vehicle seat back and forth according to actual seating requirements, the external control device is operated to start the motor 32, the motor 32 drives the motor shaft 33 to rotate, the motor shaft 33 further drives the gears inside the gear boxes 22 at two sides to rotate, and the screw 12 rotates, so that the sliding seat 4 and the upper sliding rail 2 move back and forth finally, and the vehicle seat moves back and forth. In the process of sliding the upper sliding rail 2 and the sliding seat 4 back and forth, because the anti-backlash adjusting plate 52 is subjected to the elastic action of the elastic member 54, the adjusting roller 53 connected to one end of the anti-backlash adjusting plate 52 always keeps the upward turning trend and tightly abuts against the inner wall of the lower rail 1 to provide upward lifting force for the lower rail, when the lower rail 1 is deformed or the surface of the adjusting roller 53 is worn, the adjusting roller 53 can also eliminate the deformation amount of the inner side wall of the fixed rail 1 or compensate the gap generated by the wear of the inner side wall of the fixed rail 1 under the elastic action of the elastic member 54, so that the gap between the fixed rail 1 and the upper sliding rail 2 is effectively eliminated, the purpose of automatically eliminating the gap is achieved, the upper sliding rail 2 and the sliding seat 4 can slide more smoothly, abnormal sound is reduced, and the riding comfort of passengers is improved.

To sum up, the technical solution provided by the present invention overcomes the shortcomings in the prior art, successfully completes the invention task, and truly realizes the technical effects of the applicant in the technical effect column.

Claims (10)

1. A gap eliminating device for a long slide rail of a vehicle seat comprises a pair of lower rails (1), wherein the pair of lower rails (1) are provided with openings upwards and lower rail inner cavities (11), and a transmission screw rod (12) is fixedly arranged in each lower rail inner cavity (11); the pair of upper sliding rails (2) are respectively arranged in the two lower rail inner cavities (11), and the pair of upper sliding rails (2) are in sliding fit with the corresponding lower rails (1); the driving mechanism (3) is arranged between the two upper sliding rails (2) and can realize the integral motion of the upper sliding rails (2); the four sliding seats (4) are fixedly connected with a seat frame of the vehicle seat and are respectively connected to the end parts of the two ends of the upper sliding rail (2) in a mode of forming a group by two, the four sliding seats (4) are in sliding fit with the lower rail (1), and the two transmission screw rods (12) penetrate through the corresponding sliding seats (4) and are in transmission connection with the sliding seats; the method is characterized in that: the anti-backlash device comprises four anti-backlash mechanisms (5) capable of eliminating a gap between a lower rail (1) and an upper rail (2), wherein the four anti-backlash mechanisms (5) are respectively arranged at the front part and the rear part of the upper rail (2) in a state of being grouped in pairs and correspond to the position between the lower rail (1) and the upper rail (2), each anti-backlash mechanism (5) comprises a main body piece (51), a pair of anti-backlash adjusting plates (52) and a pair of adjusting rollers (53), the main body piece (51) is arranged in the upper rail (2) and extends out of the upper rail (2) downwards, the two anti-backlash adjusting plates (52) are hinged to the outer side of the main body piece (51), the two adjusting rollers (53) are respectively connected to one end part of the anti-backlash adjusting plates (52) in the length direction, and elastic pieces (54) abutting against the anti-backlash adjusting plates (52) are respectively connected to the positions of the other end parts of the main body piece (51) in the left side and the right side, which correspond to the inner side wall (52) in the length direction, and the elastic pieces (54) abut against the lower rail (1).

2. The anti-backlash device for the long slide rail of the seat of the vehicle according to claim 1, wherein the main body (51) of the anti-backlash mechanism (5) has a main body plate (511), the main body plate (511) is accommodated in the upper slide rail (2) and extends downward beyond the upper slide rail (2), a pair of side positioning plates (512) is formed by outwardly protruding lower portions of two side panels of the main body plate (511), and a pair of the anti-backlash adjustment plates (52) are respectively disposed at outer positions of the respective corresponding side positioning plates (512); an elastic part stop plate (521) bent towards the main body part (51) is formed at one end part of the anti-backlash adjusting plate (52) in the length direction, a hinge shaft (522) is connected to a position, close to the adjusting roller (53), in the length direction of the anti-backlash adjusting plate (52), the hinge shaft (522) penetrates through the anti-backlash adjusting plate (52) and then is connected with the side positioning plate (512) so as to realize the hinge joint of the anti-backlash adjusting plate (52) and the main body part (51), an adjusting roller positioning shaft (523) is installed at one end part of the anti-backlash adjusting plate (52) in the length direction corresponding to the adjusting roller (53), and the adjusting roller (53) is rotatably sleeved on the adjusting roller positioning shaft (523); the two elastic pieces (54) are respectively arranged on the end part, far away from the adjusting roller (53), of the corresponding side positioning plate (512) in the length direction, and one end of each elastic piece (54) abuts against the elastic piece stop plate (521), so that the anti-backlash adjusting plate (52) is under the elastic action of the elastic pieces (54) and the adjusting roller (53) abuts against the inner side wall of the lower rail (1) under the elastic action of the elastic pieces (54).

3. The anti-backlash device for the long-sliding-rail of the seat of the vehicle according to claim 1, wherein a lower-rail mounting plate (13) is fixedly mounted at the proximal end of each end of the bottom of the lower rail (1) in the length direction, and a plurality of lower-rail mounting plate connecting holes (131) for connecting with the bottom plate of the vehicle are formed in the lower-rail mounting plate (13).

4. The backlash eliminating device for a long slide of a vehicle seat as claimed in claim 1, wherein the two lower rails (1) are provided at the central portions of the surfaces thereof facing the upper side with lower rail opening grooves (14) extending in the longitudinal direction thereof, and a lower rail guard (15) is fixedly installed on the top plate of the lower rail (1) at positions corresponding to both sides of the lower rail opening grooves (14).

5. The gap eliminating device for the long slide rail of the vehicle seat according to claim 1, wherein a pair of lower rail side cavities (111) are further formed on two sides of the lower rail inner cavity (11) of the lower rail (1), the upper slide rail (2) comprises a slide seat frame (21) and a gear box (22) fixedly installed in the middle of the slide seat frame (21) in the length direction, the slide seat frame (21) and the gear box (22) are both arranged in the lower rail inner cavity (11) in a penetrating manner and extend upwards out of the lower rail (1), the gear box (22) is in transmission connection with the driving mechanism (3), and the transmission screw (12) penetrates through the gear box (22) and is in transmission connection with a gear inside the gear box (22); and two sides of the bottom of the sliding seat (4) are respectively connected with a sliding roller (41), the sliding rollers (41) are supported on the lower side wall of the lower rail side cavity (111) of the lower rail (1) and can slide back and forth in a reciprocating manner, and the adjusting roller (53) is abutted with the upper side wall surface of the lower rail side cavity (111) of the lower rail (1).

6. The anti-backlash device for the long slide rail of the vehicle seat according to claim 5, wherein the slide seat frame (21) is opened downward and has a slide seat frame inner cavity (211), and the main body member (51) of the anti-backlash mechanism (5) is accommodated in the slide seat frame inner cavity (211) and protrudes downward out of the slide seat frame (21); the upper sliding rail (2) further comprises a pair of guide frames (23) connected to two sides of the gear box (22), the pair of guide frames (23) are arranged at positions between the gear box (22) and the clearance eliminating mechanism (5), the pair of guide frames (23) are also accommodated in the inner cavity (211) of the sliding seat frame and extend out of the sliding seat frame (21) downwards, sliding seat frame folding edges (212) are formed at positions of two sides of the bottom of the sliding seat frame (21) in an outward protruding mode, a sliding seat frame guide sleeve (213) is sleeved on the sliding seat frame folding edges (212), and the sliding seat frame guide sleeve (213) is abutted with the upper side wall surface of the lower rail side cavity (111) of the lower rail (1) to realize sliding fit; a gear box clamping groove (214) is formed in the middle of the sliding seat frame (21) in the length direction, the gear box (22) is clamped in the gear box clamping groove (214), a pair of sliding seat matching plates (216) are further formed at the end portions of the two ends of the sliding seat frame (21) in the length direction, sliding seat connecting portions (44) are formed on the sliding seat (4) and in positions corresponding to the sliding seat matching plates (216), and the sliding seat connecting portions (44) are connected with the corresponding sliding seat matching plates (216) in a matching mode.

7. The anti-backlash device for the long slide rail of the vehicle seat according to claim 6, wherein an inner rail frame (16) is installed at the bottom of the inner cavity (11) of the lower rail (1), a pair of inner rail frame engaging edges (161) is formed by bending inward the left and right ends of the inner rail frame (16) in the length direction, sliding seat engaging edges (42) are formed by protruding outward at the positions corresponding to the inner rail frame engaging edges (161) at both sides of the bottom of the sliding seat (4), the two sliding seat engaging edges (42) are respectively in sliding engagement with the corresponding inner rail frame engaging edges (161), guide frame engaging edges (231) are formed by protruding outward at both sides of the bottom of the guide frame (23) and at the positions corresponding to the inner rail frame engaging edges (161) at both sides, and the two guide frame engaging edges (231) are also in sliding engagement with the corresponding inner rail frame engaging edges (161).

8. The anti-backlash device for the long slide rail of the vehicle seat according to claim 6, wherein the driving mechanism (3) comprises a motor base (31), a motor (32) fixedly installed in the motor base (31), and a motor shaft (33) penetrating through the motor (32) and accommodated in the motor base (31), the motor shaft (33) is in transmission connection with the motor (32), both ends of the motor shaft (33) in the length direction are respectively in transmission engagement with gears inside the gear boxes (22) on both sides, both ends of the motor base (31) in the length direction are also fixedly installed with a motor base connecting plate (311), a slide base frame connecting plate (215) is fixedly installed on the slide base frame (21) and at a position corresponding to the upper part of the gear box (22) through a fastener, and both motor base connecting plates (311) are respectively and fixedly installed with the corresponding slide base connecting plates (215) through fasteners.

9. The anti-backlash device for the long slide rail of the vehicle seat according to claim 1, wherein an inclined slide seat fixing hole (43) is formed at a position close to the top end of the upper end of the slide seat (4), and the slide seat fixing hole (43) penetrates through the slide seat (4) and can realize the fixed connection between the slide seat (4) and the vehicle seat.

10. The gap eliminating device for the long slide rail of the vehicle seat as claimed in claim 1, wherein a screw bearing seat (17) is installed at the proximal end position of both ends of the lower rail inner cavity (11) of the lower rail (1) in the length direction, and both end parts of the transmission screw (12) are respectively and rotatably arranged in the screw bearing seats (17) at both sides and rotatably connected with the screw bearing seats, so as to realize the installation and positioning of the transmission screw (12).

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