CN113335151B - Electric sliding rail device of vehicle seat - Google Patents

Abstract

The utility model provides an electronic slide rail device of vehicle seat, includes a pair of slip track, and the symmetry sets up and both has the track inner chamber, establishes the open slot on the upper side surface of slip track orientation, characteristics: the unlocking mechanism and the driving mechanism are mounted on the upper portions of the two sliding mechanisms, the sliding mechanisms comprise sliding seats and gear sliding assemblies, each gear sliding assembly comprises a pair of rotating gear pieces and a sliding seat driving block, each driving mechanism comprises a driving motor, a reduction gearbox, a driving spline shaft and two driving gear assemblies, the reduction gearbox is connected with the unlocking assembly, and the driving gear assemblies are connected with the rotating gear pieces and can drive the rotating spur gears of the two rotating gear pieces to rotate on the corresponding toothed plates so as to realize front-back sliding of the sliding seats. The stability of the vehicle seat in the process of sliding forwards and backwards is guaranteed, no setback feeling is caused during starting, locking is stable, and the service life is long.

Description

Electric sliding rail device of vehicle seat

Technical Field

The invention belongs to the technical field of automobile parts, and particularly relates to an electric sliding rail device of a vehicle seat.

Background

A vehicle seat is a component that is in direct physical contact with the body of an automobile occupant, except for the steering wheel, and that can provide the occupant with a convenient, comfortable and safe riding position. The design of the vehicle seat must conform to the physiological function of the human body, the vehicle seat is attractive in appearance and is made of reliable and comfortable materials on the premise of ensuring comfort, and in order to ensure the most comfortable sitting posture and operation space of drivers, automobile factories generally design various position adjusting mechanisms and locking devices at the lower part of the seat, long rail devices are needed for adjusting the front and rear positions of the vehicle seat, and along with the continuous progress of electric technology, the position adjusting mode of the vehicle seat is gradually changed from manual adjustment to electric adjustment. Related technical information about an electric rail device of a vehicle seat is visible in the published chinese patent literature, and is exemplified by CN213383949U (an automobile seat electric rail driving structure), CN213228380U (an automobile seat electric rail), CN211543309U (a vehicle seat rail structure and a vehicle seat), CN 111923788A (a rail assembly capable of being hidden and installed), and the like, but not limited to the above-mentioned technical proposal, the electric transmission mode of the existing vehicle seat is mainly a mode that a motor drives a worm gear box and a seat to slide on a screw rod, The toothed belt is matched with the gear in a transmission way, and the rack is matched with the gear in a transmission way. The mode that the motor drives the worm gear box and the seat to slide on the screw rod has high requirements on the machining precision of the whole structure, the matching precision of the worm gear box and the screw rod is difficult to ensure, the sliding block is possibly blocked on the screw rod due to a small deviation of the structure, the deformation of the sliding rail and the situation that the screw tooth gap of the screw rod become large can occur along with the extension of the service time, the seat is rocked, and the reliability and the reasonable service life of the structure cannot be ensured; for the mode of using the toothed belt for transmission, due to the limited size, the width of the toothed belt and the diameter of the transmission wheel are smaller, when the vehicle is in a non-horizontal state, the toothed belt not only needs to provide sliding force, but also needs to overcome the dead weight of passengers and partial gravity of a seat, so that the problem of slipping easily occurs; The rack and the gear drive are matched, and particularly, the rack and the electric driving mechanism are arranged in the lower track fixed on the vehicle bottom plate, the electric driving mechanism comprises a motor, a gear is arranged on a rotating shaft of the motor and meshed with the rack, and the seat body can be driven to adjust the front and rear positions through rotation of the motor. For example, "a seat assembly and an electric slide rail" described in chinese patent application publication No. CN210617914U, the electric slide rail includes a slide rail assembly including an upper rail and a lower rail, the lower rail is fixed to a vehicle floor, and the upper rail is directly or indirectly fixed to the seat body; Still include electric drive mechanism and rack, the one side of rack is the flank of tooth, and the another side is equipped with rivets the post, and the lower rail is equipped with the via hole, the riveting post of rack passes the via hole to it is fixed through riveting technology, electric drive mechanism has output gear, and output gear meshes with the rack mutually, with drive seat body relatively the lower rail carries out the displacement, and it has the installation time consuming weak point, and installation effectiveness is higher, saves the advantage of cost of labor. However, in the technical scheme, the electric driving mechanism is provided with an output gear, the output gear is meshed with the racks, the motor rotating shaft is in transmission connection with the input shaft of the gearbox through the flexible shaft assembly, the output gear is arranged on the input shaft of the gearbox, and a single output gear can be meshed with one rack only, so that the stability of the whole mechanism cannot be ensured; Meanwhile, two groups of flexible shaft assemblies are required to be arranged for driving the output gears in the two lower rails, so that the production cost and the installation difficulty are greatly increased; in addition, this technical scheme guarantees that the upper rail is in the timely stop of drive seat back-and-forth slip back owing to not setting up corresponding upper rail locking mechanism, and the condition of hysteresis slip can appear in the upper rail, can't guarantee the reliability of long-time use equally.

In view of the above, there is a need for a reasonable improvement in the structure of the electric slide rail device of the existing vehicle seat. To this end, the inventors have advantageously devised that the technical solutions described below are created in this context.

Disclosure of Invention

The invention aims to provide an electric slide rail device of a vehicle seat, which has a simple structure and convenient installation, is beneficial to arranging two rack plates and a gear sliding assembly in transmission connection with the rack plates in one sliding rail to ensure the stability of the vehicle seat in the front-back sliding process, is beneficial to arranging a driving gear assembly capable of driving the gear sliding assembly to rotate to ensure the stability of transmission, does not feel a bump during starting to improve the comfort, and is convenient to arrange a locking structure to improve the stability of locking and prolong the service life.

The invention is characterized in that a pair of two rack plates are fixedly arranged in the track cavity of the sliding track, a sliding mechanism which can be rotationally connected with a rack plate and can slide back and forth is arranged in the track cavity of the sliding track, the sliding mechanism upwards penetrates out of the opening groove of the sliding track, an unlocking component is fixedly arranged at the upper parts of the two sliding mechanisms, a driving mechanism which can drive the two sliding mechanisms to move back and forth is also arranged at the upper parts of the two sliding mechanisms, the sliding mechanism comprises a sliding seat and a gear sliding component which are fixedly connected together, the gear sliding component comprises a pair of rotary gear pieces and a pair of sliding blocks which are fixedly matched with the sliding seat, the motor is arranged in the track cavity of the sliding track, the sliding mechanism is rotatably connected with the rack plates and can slide back and forth, the sliding mechanism upwards penetrates out of the opening groove of the sliding track, the upper parts of the two sliding mechanisms are fixedly provided with a speed reducing component, the driving mechanism which can drive the two sliding components to move back and forth is fixedly arranged at the upper parts of the two sliding mechanisms, the sliding mechanism comprises a driving seat and a gear sliding component which is fixedly connected with the gear sliding seat which is fixedly matched with the sliding seat, the driving mechanism which is fixedly connected with the driving component, the two driving component which is fixedly connected with the two end parts of the driving spline shaft which pass through the driving component, the two driving component which pass through the spline boxes, the driving component which is fixedly connected with the end part of the driving component, the driving component which is fixedly connected with the driving component, and the driving component, the drive gear assembly is also coupled to a pair of rotary gear members and is capable of driving the rotary gear members to rotate on respective ones of the rack plates to effect fore-and-aft sliding movement of the slide mount.

In a specific embodiment of the present invention, a pair of rack plate positioning plates extending in the longitudinal direction thereof are formed protruding upward from the bottom plate of the slide rail, and the slide rail is formed as a pair of slide rail side plates, two of the rack plate positioning plates are respectively disposed at positions close to the slide rail side plates, and a rack plate mounting groove is formed between the two of the rack plate positioning plates and the slide rail side plates corresponding thereto, the rack plate is disposed in the rack plate mounting groove, the upward facing side surface of the rack plate is formed as a corrugated surface, a plurality of fitting posts are formed on the side surface of the two rack plates opposite to the respective slide rail side plates, and a plurality of fitting holes penetrating the thickness direction thereof are formed on the slide rail side plates and at positions corresponding to the plurality of the fitting posts, and the fitting posts and the fitting holes are fitted to each other, thereby fixedly mounting the rack plate in the rail inner cavity.

In another specific embodiment of the present invention, a pair of decorative strips are embedded in the upper part of the top panel of the sliding rail, the pair of decorative strips extend along the length direction of the sliding rail and are symmetrically arranged at two sides of the open slot, a row of positioning block locking holes are formed at two sides of the open slot, and a plurality of sliding rail fixing screws are arranged on the bottom panel of the sliding rail at intervals along the length direction of the bottom panel of the sliding rail.

In another specific embodiment of the present invention, the sliding seat of the sliding mechanism is of a strip plate structure, the cross section of the sliding seat is of an omega-shaped structure, the end part of the lower end of the sliding seat is in an open mouth shape, a sliding seat inner cavity extending along the length direction of the sliding seat is formed in a hollow mode, the sliding seat comprises sliding seat side panels formed on two sides of the sliding seat inner cavity, the gear sliding component is fixedly installed at the lower position of the near end part of one end of the sliding seat in the length direction, the rotating gear piece comprises a rotating shaft rod and a rotating straight gear, the rotating shaft rod passes through the sliding seat side panels, the end part of the rotating shaft rod body in the length direction is connected with the driving mechanism, the rotating straight gear and the tooth surfaces of the tooth plates are meshed with each other, the rotating straight gear can roll on the tooth plates, a sliding seat driving hole penetrating through the thickness direction of the sliding seat side panels is formed on the sliding seat side panels, the sliding seat driving block penetrates through the rotating shaft rod piece and is formed on the sliding seat driving block at the lower position corresponding to the rotating shaft rod, the sliding seat driving block is matched with the sliding seat driving block, and the driving block is locked with the driving sleeve at the position of the sliding seat.

In still another specific embodiment of the present invention, a seat mounting seat is fixedly provided at both end portions of the sliding seat of the sliding mechanism in the longitudinal direction, a gap eliminating block is provided at both sides of the lower end portion of the seat mounting seat, and a seat mounting hole is provided at the upper end portion of the seat mounting seat.

In still another specific embodiment of the present invention, a side transverse plate is formed at the lower end edge of the sliding seat side panel of the sliding seat outwards along the length direction thereof, and a side bending plate is formed at the side edge of the side transverse plate facing upwards away from the sliding seat side panel body in the length direction thereof, and the side bending plate and the sliding seat side panel body are kept in a parallel state; a locking piece is arranged in the inner cavity of the sliding seat, the locking piece comprises a locking plate and a plurality of locking positioning blocks formed on two sides of the length direction of the locking plate, a pushing rod is fixedly arranged at the center of the length direction of the locking plate, the pushing rod extends upwards along the vertical direction and penetrates through the top surface plate of the sliding seat, a pushing rod positioning sleeve is arranged at the joint of the pushing rod and the top surface plate of the sliding seat, a plurality of integrally penetrating locking positioning block sliding grooves are formed on the side surface plate and the lateral transverse plate of the sliding seat, a plurality of locking positioning blocks penetrate through the corresponding locking positioning block sliding grooves and can slide up and down in the locking positioning block sliding grooves, one end part of the locking positioning block far away from the locking plate is connected with the positioning block locking holes on two sides of the opening groove in a matching way, a locking reset spring is fixedly arranged at the near end parts of the two ends of the locking plate in the length direction, the locking reset spring is also arranged upwards along the vertical direction, a locking reset spring locking hole is respectively arranged on the locking plate and at the positions corresponding to the two locking reset springs, the locking reset spring passes through the locking reset spring locking hole and is fixed in the locking reset spring locking hole, the body of the locking reset spring positioned at the lower part of the locking reset spring locking hole is of a conical structure with the diameter of the end part of the lowest end being larger than that of the locking reset spring locking hole, namely, the diameter of the end part of the lowest end is gradually contracted upwards, a locking reset spring hook is formed at the upper end part of the locking reset spring, a locking reset spring fixing part is formed on the top panel of the sliding seat and at the position corresponding to the two locking reset springs, the return spring hook is fixedly connected with the locking return spring fixing part.

In a further specific embodiment of the present invention, a pair of pressing blocks are further disposed in the inner cavity of the sliding seat and at positions corresponding to two sides of the length direction of the locking member, the pair of pressing blocks are further hinged with a locking assembly, the pressing blocks are in a substantially meniscus or substantially kidney-shaped structure, the pressing blocks are formed close to one end of the locking plate and are positioned below the two end parts of the length direction of the locking plate, a pressing block pivot shaft is mounted in the middle position of the pressing blocks, the pressing block pivot shaft is penetrated between two sliding seat side panels of the sliding seat and is fixedly connected with the two sliding seat side panels, the pressing blocks are rotatably connected with the pressing block pivot shaft, a pressing block reset spring is fixedly connected with the pressing block, the pressing block reset spring extends upwards obliquely, the upper end part of the pressing block reset spring is formed on a pressing block reset spring, the pressing block reset hook is formed on the top panel of the sliding seat and is positioned below the two end parts of the locking plate in a direction corresponding to the two end parts of the locking plate, and the pressing block reset spring is fixedly connected with the pressing block reset hook in a thickness direction, and the pressing block reset spring is fixedly connected with the pressing block reset hook is formed at one end part of the pressing block reset hook in a direction; the locking assembly comprises a pair of locking cams, a locking cam connecting shaft and a locking cam hinge shaft, wherein the locking cams are fixedly connected with the locking cam connecting shaft, the locking cams are arranged at positions between a side plate of a sliding seat and a side bending plate, a locking cam abdication groove penetrating through the side transverse plate in the thickness direction is formed in the side transverse plate, the locking cams are positioned in the locking cam abdication groove, the locking cam connecting shaft penetrates through an inner cavity of the sliding seat and is connected with the side bending plate together through the side plate of the sliding seat, the locking cam hinge shaft penetrates between the two locking cams and is hinged with a hinge shaft locking hole of the pressing block, the locking cams are provided with an upper flange and a lower flange, the upper flange is locked with the upper surface of a track inner cavity of a sliding track in a matched mode, and the lower flange is locked with the upper end face of the rack plate positioning plate in a matched mode; and a pair of support gear members are further provided on both sides of one end of the slide base in the longitudinal direction at a position away from the lower portion of the gear slide assembly, the pair of support gear members being engaged with the rack plate.

In a further specific embodiment of the present invention, the unlocking assembly includes an unlocking motor, an unlocking spline shaft in driving connection with the unlocking motor, and a pair of connection seat plates, the two connection seat plates are respectively and fixedly installed at the upper parts of the corresponding sliding seats, the unlocking spline shaft sequentially passes through the two connection seat plates, a tongue plate is fixedly installed on the shaft body of the unlocking spline shaft and at the position corresponding to the connection seat plate, the tongue plate is disposed at the upper part of the connection seat plate, one end part of the tongue plate in the length direction is fixedly connected with the unlocking spline shaft, the other end part of the tongue plate abuts against the upper part of the push rod of the sliding mechanism, a plurality of connection seat plate fixing holes are formed on the connection seat plate, the connection seat plate is fixedly connected with the sliding seat through the connection seat plate fixing holes, a push rod yielding hole is formed in the middle part of the connection seat plate, and the push rod passes through the push rod yielding hole.

In still another specific embodiment of the present invention, the driving motor, the reduction gearbox and the driving spline shaft of the driving mechanism are all disposed at the upper position of the sliding track, the two driving gear assemblies comprise a driving gear accommodating box with hollow inside, the two driving gear accommodating boxes are inserted into the corresponding sliding seat inner cavities, a plurality of accommodating box fixing bolts are disposed on the driving gear accommodating box, the driving gear accommodating box is fixedly connected with the sliding seat side panels through the accommodating box fixing bolts, the driving gear accommodating box is sequentially disposed in the inner hollow cavity of the driving gear accommodating box from top to bottom with a power input gear, a transition gear, a power output gear and a transmission gear which are meshed with each other and can realize transmission connection, the two end parts of the driving spline shaft in the length direction pass through the driving gear accommodating boxes and are in transmission connection with the power input gear, the reduction gearbox is fixedly connected at one side position of the two connecting seat plates, the transmission gear protrudes out of the lower end parts of the driving gear accommodating boxes, a thickness part is disposed at the center position of the transmission gear, a shaft body is fixedly connected with the side panels in the rotation direction of the center gear through the center gear, the two side panels are rotatably mounted at the two sides of the center gear shaft in the rotation direction, the rotation direction of the center gear is rotatably mounted at the center gear shaft, the two side panels are rotatably mounted at the two sides of the center gear through the transmission shaft, and the transmission shaft is rotatably mounted at the two side shafts are rotatably mounted at the two side shafts respectively, thereby realizing the rotary connection of the transmission gear and the driving gear accommodating box.

In still another specific embodiment of the present invention, a transition gear positioning round table is convexly disposed at the central position of each of the two axial side surfaces of the transition gear, and the two transition gear positioning round tables are respectively in rotational fit with the side panels on the two sides of the driving gear accommodating box so as to realize rotational connection between the transition gear and the driving gear accommodating box, and similarly, a power output gear positioning round table is convexly disposed at the central position of each of the two axial side surfaces of the power output gear, and the two power output gear positioning round tables are respectively in rotational fit with the side panels on the two sides of the driving gear accommodating box so as to realize rotational connection between the power output gear and the driving gear accommodating box.

The invention has the beneficial effects that due to the adoption of the structure, the invention has the following advantages: firstly, two rack plates and a gear sliding assembly in transmission connection with the rack plates are arranged in one sliding track, so that two rotating gear pieces of the gear sliding assembly can roll on the respective rack plates, the whole structure is reliable and simple, and the stability of the vehicle seat in the front-back sliding process is ensured; secondly, through setting up two drive gear assemblies and a drive spline shaft that is connected with it in a transmission way, not only simple structure is compact, and drive gear assembly and sliding seat combine occupation volume few, and gear drive is smooth in motion, when starting the regulation seat, can not appear to pause and feel and promote the travelling comfort, can guarantee simultaneously that two sliding seats displace synchronism, avoid slipping the problem such as jamming; thirdly, owing to adopted the unlocking motor to promote the closure and remove and make the rotatory structure of pressing block and locking cam, locking cam can be through the flange of upper and lower both sides, even locking cam wears out or the slide rail warp, as long as have one side flange can support and lean on the slide rail and just can carry out effective locking, greatly improved locking structure's stability, the condition that the vehicle seat can not appear to pause and stop the slip under the resting state.

Drawings

Fig. 1 is a schematic overall view of a three-dimensional structure according to an embodiment of the present invention.

Fig. 2 is an exploded view of the embodiment of fig. 1 in another perspective.

Fig. 3 is an exploded view of the slide mechanism of the embodiment of fig. 1.

Fig. 4 is a schematic diagram of the driving gear assembly in the embodiment shown in fig. 1.

In the figure: 1. a sliding rail; 11. the track comprises a track inner cavity, a 12 open slot, 121, a positioning block locking hole, 13, rack plates, 131, a toothed surface, 132, a jogged column, 14, a rack plate positioning plate, 15, a sliding track side panel, 151, a jogged hole, 16, a rack plate mounting slot, 17, a decoration strip and 18, a sliding track fixing screw;

2. Slide mechanism, 21, slide seat, 211, slide seat cavity, 212, slide seat side panel, 2121, slide seat drive aperture, 213, side cross plate, 2131, lock cam relief slot, 214, side fold plate, 215, lock locating block slide slot, 216, lock return spring retainer, 217, compression spring retainer, 22, gear slide assembly, 221, rotary gear, 2211, rotary shaft, 2212, rotary spur gear, 222, slide seat drive block, 2221, slide seat drive block locking step, 223, bushing, 23, seat mount aperture, 231, anti-backlash block, 232, seat mount aperture, 24, lock, 241, lock plate, 2411, lock return spring lock aperture, 242, lock locating block, 243, push, 2431, push rod retainer, 244, lock return spring, 2441, lock return spring hook, 25, press block, 251, press block pivot shaft, 253, press block return spring, 2531, press block return spring upper, 254, hinge shaft lock aperture, 26, lock pin, 261, 263, 261, 2, locking shaft support flange, 261, 263, and 2.

3. The unlocking assembly, 31, an unlocking motor, 32, an unlocking spline shaft, 33, a connecting seat plate, 331, a connecting seat plate fixing hole, 332, a pushing rod abdicating hole and 34, and a tongue locking plate;

4. The drive mechanism, 41, drive motor, 42, reduction box, 43, drive spline shaft, 44, drive gear assembly, 441, drive gear housing box, 4411, housing box fixing bolt, 442, power input gear, 443, transition gear, 4431, transition gear positioning boss, 444, power output gear, 4441, power output gear positioning boss, 445, transfer gear, 4451, transfer gear central through hole, 4452, transfer gear positioning boss.

Detailed Description

The following detailed description is of embodiments, but the embodiments are not limited to the embodiments, and any equivalent changes made according to the inventive concept are to be regarded as technical scope of the invention.

In the following description, any reference to the directions or azimuths of up, down, left, right, front and rear is based on the positions shown in the corresponding drawings, and therefore, should not be construed as a limitation on the technical solutions provided by the present invention.

Referring to fig. 1 to 4, an electric slide rail device of a vehicle seat is shown, which comprises a pair of elongated slide rails 1, wherein the slide rails 1 are symmetrically arranged and both have rail inner cavities 11 extending along the length direction, and an open slot 12 extending along the length direction is formed on the surface of the slide rail 1 facing to the upper side.

The technical key points of the technical scheme provided by the invention are as follows: a pair of two rack plates 13 are fixedly arranged in the inner rail cavity 11 and on the bottom panel of the sliding rail 1, a sliding mechanism 2 which can be rotationally connected with the rack plates 13 and can slide back and forth is arranged in the inner rail cavity 11 of the two sliding rails 1, the sliding mechanism 2 upwards passes through an open slot 12 of the sliding rail 1, an unlocking component 3 is fixedly arranged at the upper part of the two sliding mechanisms 2, a driving mechanism 4 which can drive the two sliding mechanisms to move back and forth is also arranged at the upper part of the two sliding mechanisms 2, the sliding mechanism 2 comprises a sliding seat 21 and a gear sliding component 22 which are fixedly arranged together, the gear sliding component 22 comprises a pair of rotating gear pieces 221 and a pair of sliding seat driving blocks 222 fixedly matched with the sliding seat 21 together, the driving mechanism 4 includes a driving motor 41, a reduction gearbox 42 in transmission connection with the driving motor 41, a driving spline shaft 43 and two driving gear assemblies 44, wherein the reduction gearbox 42 is fixedly connected with the unlocking assembly 3, the two driving gear assemblies 44 are inserted into the corresponding sliding seats 21 and are fixedly connected with the sliding seats, the driving spline shaft 43 is inserted into the reduction gearbox 42 and is in transmission connection with the sliding seats, two end parts in the length direction of the driving spline shaft 43 penetrate through the two driving gear assemblies 44 and are in transmission connection with the two driving gear assemblies, and the driving gear assemblies 44 are also connected with the pair of rotating gear members 221 and can drive the two rotating gear members 221 to rotate on the corresponding rack plates 13 so as to realize front-back sliding of the sliding seats 21.

In the present embodiment, a pair of rack plate positioning plates 14 extending in the longitudinal direction of the rack plate positioning plates are formed to protrude upward from the bottom surface plate of the slide rail 1, the slide rail 1 is configured as a pair of slide rail side plates 15, the two rack plate positioning plates 14 are respectively provided at positions close to the slide rail side plates 15, a rack plate mounting groove 16 is formed between the slide rail side plates 15 to which the two rack plate positioning plates 14 are respectively adjacent, the rack plate 13 is provided in the rack plate mounting groove 16, the rack plate 13 has a facing upper side surface formed with a corrugated surface 131, a plurality of fitting posts 132 are formed on the side surfaces of the slide rail side plates 15 facing each other of the two rack plates 13, a plurality of fitting holes 151 penetrating the thickness direction thereof are formed in the slide rail side plates 15 at positions corresponding to the plurality of the fitting posts 132, and the fitting posts 132 are mutually fitted together with the fitting holes 151, thereby fixing the rack plate 13 in the track cavity 11.

Further, a pair of trim strips 17 are fitted to the upper portion of the top plate of the slide rail 1, the pair of trim strips 17 extend along the longitudinal direction of the slide rail 1 and are symmetrically disposed on both sides of the open groove 12, a row of block locking holes 121 are formed on both sides of the open groove 12, and a plurality of slide rail fixing screws 18 are disposed on the bottom plate of the slide rail 1 at intervals along the longitudinal direction thereof.

Referring to fig. 1 and 2 and referring to fig. 3 again, the sliding seat 21 of the sliding mechanism 2 is of a strip-shaped plate structure and has a cross section similar to an omega-shaped structure, the lower end of the sliding seat 21 is in an open-mouth shape and is internally hollow to form a sliding seat inner cavity 211 extending along the length direction thereof, the sliding seat 21 comprises sliding seat side panels 212 formed on two sides of the sliding seat inner cavity 211, the gear sliding assembly 22 is fixedly installed at the lower position of the proximal end of the sliding seat 21 in the length direction, the rotating gear 221 comprises a rotating shaft rod 2211 and a rotating straight gear 2212, the rotating shaft rod 2211 passes through the sliding seat side panels 212 and has one end in the length direction of the rotating shaft rod 2211 connected with the driving mechanism, the rotating straight gear 2212 is meshed with the toothed surface 131 of the rack plate 13, the rotating straight gear 2212 can roll on the rack plate 13, a sliding seat side panel 212 is formed at the position corresponding to the rotating straight gear 221, a sliding block 2121 penetrating through the thickness direction thereof is formed at the position corresponding to the sliding seat side panels 212, the rotating shaft rod 222 is matched with the driving shaft rod 222, and a driving sleeve 222 is formed at the position corresponding to the driving shaft rod 222, and the rotating shaft rod 222 is connected with the driving shaft rod 222 in the position corresponding to the rotating shaft rod 222.

Further, a seat mounting seat 23 is fixedly disposed at the two end portions of the sliding seat 21 of the sliding mechanism 2 in the longitudinal direction, a gap eliminating block 231 is disposed at two sides of the lower end portion of the seat mounting seat 23, and a seat mounting hole 232 is disposed at the upper end portion of the seat mounting seat 23.

Further, a side transverse plate 213 is formed outwardly and in a length direction thereof at a lower end edge of the slide seat side panel 212 of the slide seat 21, and a side bending plate 214 is formed upwardly at a side edge of the side transverse plate 213 away from the slide seat side panel 212 body in a length direction thereof, the side bending plate 214 being maintained in a parallel state with the slide seat side panel 212 body; a locking piece 24 is disposed in the sliding seat cavity 211 of the sliding seat 21, the locking piece 24 includes a locking plate 241 and a plurality of locking positioning blocks 242 formed on both sides of the locking plate 241 in the length direction, a pushing rod 243 is fixedly mounted at the center of the locking plate 241 in the length direction, the pushing rod 243 extends upward along the vertical direction and passes through the top panel of the sliding seat 21, a pushing rod positioning sleeve 2431 is disposed at the connection between the pushing rod 243 and the top panel of the sliding seat 21, a plurality of integrally penetrating locking positioning block sliding grooves 215 are formed on the sliding seat side panel 212 and the lateral transverse plate 213 of the sliding seat 21, a plurality of locking positioning blocks 242 pass through the corresponding locking positioning block sliding grooves 215 and can slide up and down in the locking positioning block sliding grooves 215, and the end of the locking positioning block 242 far from the locking plate 241 is connected with the positioning block locking holes 121 on both sides of the opening groove 12 in a matching way, a locking return spring 244 is fixedly arranged at the positions of the near end parts of both ends of the locking plate 241 in the length direction, the locking return spring 244 is also arranged upwards along the vertical direction, a return spring locking hole 2411 is respectively arranged on the locking plate 241 and at the positions corresponding to the two locking return springs 244, the locking return spring 244 passes through the return spring locking hole 2411 and is fixed in the return spring locking hole 2411, the body of the locking return spring 244 positioned at the lower part of the return spring locking hole 2411 is in a conical structure with the diameter of the end part of the lowest end part larger than the diameter of the return spring locking hole 2411, namely, the upper end part of the locking return spring 244 is formed with a locking return spring hook 2441, and a locking return spring fixing portion 216 is formed on the top panel of the aforementioned slide base 21 at a position corresponding to the two locking return springs 244, and the return spring hanger 2441 is fixedly coupled with the locking return spring fixing portion 216.

In this embodiment, a pair of pressing blocks 25 are further disposed in the sliding seat cavity 211 of the sliding seat 21 and at positions corresponding to two sides of the length direction of the locking member 24, the pair of pressing blocks 25 are further hinged with a locking assembly 26, the pressing blocks 25 are in a substantially meniscus or substantially kidney-shaped structure, the pressing blocks 25 are formed close to one end of the locking plate 241 to form a pressing positioning head 251, the pressing positioning head 251 is disposed at a position below two end portions of the locking plate 241 in the length direction, a pressing block pivot shaft 252 is mounted at a middle position of the pressing blocks 25, the pressing block pivot shaft 252 is disposed between the two sliding seat side panels 212 of the sliding seat 21 in a penetrating manner and is fixedly connected with the two sliding seat side panels 212, the pressing blocks 25 are rotatably connected with the pressing block pivot shaft 252, a pressing block reset spring 253 is fixedly connected with the pressing block reset spring 253, an upper end portion of the pressing block reset spring 253 is formed to extend obliquely upwards, the pressing block reset spring 217 is formed at a position corresponding to the position of the hook plate 31, the reset spring 25is formed at a position corresponding to the position of the reset spring end portion of the hook plate 25, and the reset spring 25is fixedly connected with the reset spring end portion of the reset spring 253 in the penetrating direction, and the reset spring 25spring end portion of the hook plate 31 is formed at a position corresponding to the position of the reset spring end portion of the reset spring 253, the reset spring 253 is fixedly connected with the reset spring, and the reset spring 253 is formed at a position opposite to the reset position of the reset spring, the reset spring 253 is formed, and a reset spring, the reset spring 253 is arranged, and a reset spring has reset spring and a reset spring has reset spring; the locking assembly 26 comprises a pair of locking cams 261, a locking cam connecting shaft 262 fixedly connecting the two locking cams 261 and a locking cam hinge shaft 263, wherein the locking cams 261 are arranged at positions between the side plate 212 and the side bending plate 214 of the sliding seat 21, a locking cam giving-up groove 2131 penetrating the thickness direction of the side transverse plate 213 is formed on the side transverse plate 213, the locking cams 261 are positioned in the locking cam giving-up groove 2131, the locking cam connecting shaft 262 is penetrated in the inner cavity 211 of the sliding seat 21 and penetrates the side plate 212 to be connected with the side bending plate 214, the locking cam hinge shaft 263 is penetrated between the two locking cams 261 and hinged with the hinge shaft locking hole 254 of the pressing block 25, the locking cams 261 are provided with an upper flange 2611 and a lower flange 2612, the upper flange 2611 is matched with the upper surface of the inner cavity 11 of the sliding track 1 by rotating, and the lower flange 2612 is matched with the upper end face of the upper rack 26114 of the sliding track 1; and a pair of support gear members 27 are provided at both sides of one end of the slide seat 21 in the length direction at a position apart from the lower portion of the gear slide assembly 22, and the pair of support gear members 27 are engaged with the rack plate 13.

Further, the unlocking assembly 3 includes an unlocking motor 31, an unlocking spline shaft 32 in driving connection with the unlocking motor 31, and a pair of connection base plates 33, the unlocking motor 31 is electrically connected with an external electronic unlocking handle, the two connection base plates 33 are respectively and fixedly installed at the upper portions of the corresponding sliding bases 21, the unlocking spline shaft 32 sequentially passes through the two connection base plates 33, a latch plate 34 is fixedly installed on the shaft body of the unlocking spline shaft 32 and at a position corresponding to the connection base plates 33, the latch plate 34 is disposed at the upper portion of the connection base plates 33, one end portion of the latch plate 34 in the length direction is fixedly connected with the unlocking spline shaft 32, the other end portion of the latch plate is abutted against the upper portion of the push rod 243 of the sliding mechanism 2, a plurality of connection base plate fixing holes 331 are formed in the connection base plates 33, the connection base plates 33 are fixedly connected with the sliding bases 21 through the connection base plate fixing holes, a push rod pushing hole 332 is formed in the middle portion of the connection base plates 33, and the push rod 243 passes through the push rod holes 332.

With continued reference to fig. 1 and 2 and repeated reference to fig. 3 and 4, the driving motor 41, the reduction gearbox 42 and the driving spline shaft 43 of the driving mechanism 4 are all disposed at the upper position of the sliding track 1, the two driving gear assemblies 44 include a driving gear accommodating box 441 with hollow interior, the driving gear accommodating box 441 can be opened to mount internal components, the two driving gear accommodating boxes 441 are inserted into the corresponding sliding seat inner cavities 211, a plurality of accommodating box fixing bolts 4411 are disposed on the driving gear accommodating box 441, the driving gear accommodating box 441 is fixedly connected with the sliding seat side panels 212 through the accommodating box fixing bolts 4411, and a power input gear 442, a transition gear 443, a power output gear 444 and a transmission gear 445 which are meshed with each other and capable of realizing transmission connection are sequentially disposed in the hollow interior of the driving gear accommodating box 441 from top to bottom, the two ends of the driving spline shaft 43 in the length direction pass through the driving gear accommodating box 441 and are in transmission connection with the power input gear 442, the reduction box 42 is fixedly connected at one side position of one of the two connecting seat plates 33, the driving gear 445 protrudes out of the lower end of the driving gear accommodating box 441, a driving gear center through hole 4451 penetrating the thickness direction of the driving gear 445 is arranged at the center position of the driving gear 445, one end of the rotating shaft 2211 in the length direction of the shaft body is mutually locked and matched with the driving gear center through hole 4451 to realize the fixed installation of the rotating shaft 2211 and the driving gear 445, so that the rotating straight gear 2212 is driven to slide back and forth on the rack plate 13 through the driving gear 445, a driving gear positioning circular table 4452 is respectively protruded at the center positions of both side surfaces of the driving gear 445, and the driving gear positioning circular table 4452 is inserted into and rotatably connected with the side panels of both sides of the driving gear receiving box 441, thereby realizing the rotational connection of the driving gear 445 and the driving gear receiving box 441.

In this embodiment, a transition gear positioning boss 4431 is protruding at the center of each of the two axial side surfaces of the transition gear 443, and the two transition gear positioning bosses 4431 are in rotational engagement with the side plates on both sides of the driving gear housing box 441 to thereby realize rotational connection between the transition gear 443 and the driving gear housing box 441, and similarly, a power output gear positioning boss 4441 is protruding at the center of each of the two axial side surfaces of the power output gear 444, and the two power output gear positioning bosses 4441 are in rotational engagement with the side plates on both sides of the driving gear housing box 441 to thereby realize rotational connection between the power output gear 444 and the driving gear housing box 441.

With continued reference to fig. 1 to 4, the present inventors briefly describe the working principle of the technical solution provided by the present application: firstly, when in assembly, a vehicle seat is placed above a sliding rail 1 and is fixedly connected with a seat mounting seat 23 of a corresponding sliding mechanism 2 through fasteners such as bolts; when a driver performs forward and backward movement operation on the seat according to the actual riding experience, the unlocking motor 31 is moved by operating the external electronic unlocking handle, and further the unlocking spline shaft 32 is driven to rotate, so that the locking tongue plate 34 moves downwards and abuts against the pushing rod 243 to move downwards, the locking piece 24 is driven by the pushing rod 243 to overcome the pulling force of the locking return spring 244 to move downwards, at the moment, the locking positioning block 242 moves in the locking positioning block sliding groove 215 and is separated from the positioning block locking hole 121, the two end parts in the length direction of the locking plate 241 respectively push the pressing block positioning heads 251 of the corresponding pressing blocks 25 downwards, at the moment, the pressing blocks 25 pivot around the pressing block pivot shaft 252, the two locking cams 261of the locking assembly 26 are further driven to rotate, the upper flange 2611 of the locking cam 261 is separated from the upper surface of the track inner cavity 11 of the sliding track 1, the lower flange 2612 of the locking cam 261 is separated from the upper end surface of the rack plate positioning plate 14, so as to realize integral unlocking, then the driving motor 41 in the driving mechanism 4 starts to work and further drives the reduction gearbox 42 and the driving spline shaft 43 to start rotating, the driving spline shaft 43 drives the two power input gears 442 in the driving gear accommodating boxes 441 positioned at two sides to start rotating, the power input gears 442 then drive the mutually meshed transition gears 443 and the power output gears 444 to start rotating, the power output gears 444 further drive the bottom transmission gears 445 to rotate, the transmission gears 445 start rotating, the rotating gear piece 221 of the gear sliding assembly 22 is driven by the transmission gears 445 to synchronously rotate, at the moment, the rotating straight gears 2212 rotate on the meshed gear strips 13 and the sliding seat 21 is driven by the rotating gear piece 222 to realize front-back sliding, so that the movement of the seat is completed; finally, the step of obtaining the product, when the driver moves the seat to a proper position, the unlocking motor 31 reverses to enable the unlocking spline shaft 32 to drive the latch plate 34 to move upwards, the push rod 243 simultaneously moves upwards, the locking plate 241 moves upwards under the action of the locking return spring 244 and the locking positioning block 242 moves upwards in the locking positioning block sliding groove 215 and is in re-engagement with the corresponding positioning block locking hole 121, then the pressing block 25 is reset and pivoted around the pressing block pivot shaft 252 under the action of the pressing block return spring 244, and further the two locking cams 261 of the locking assembly 26 are driven to rotate, so that the upper flange 2611 of the locking cam 261 is in re-engagement with the upper surface of the track cavity 11 of the sliding track 1, and the lower flange 2612 of the locking cam is in re-engagement with the upper end surface of the rack plate positioning plate 14, so that the re-locking of the sliding mechanism 2 is completed.

In summary, the technical scheme provided by the invention overcomes the defects in the prior art, successfully completes the task of the invention, and faithfully honors the technical effects carried by the applicant in the technical effect column above.

Claims (7)

1. An electric sliding rail device of a vehicle seat comprises a pair of strip-shaped sliding rails (1), wherein the pair of sliding rails (1) are symmetrically arranged and are provided with a rail inner cavity (11) extending along the length direction of the sliding rails, an opening groove (12) extending along the length direction of the sliding rails is formed in the surface of the upper side of the sliding rails (1), the electric sliding rail device is characterized in that a pair of two rack plates (13) are fixedly arranged in the rail inner cavity (11) and on the bottom panel of the sliding rails (1), a sliding mechanism (2) which can be rotationally connected with the rack plates (13) and can slide back and forth is arranged in the rail inner cavities (11) of the two sliding rails (1), The sliding mechanism (2) upwards penetrates through the open slot (12) of the sliding track (1), an unlocking component (3) is fixedly arranged at the upper parts of the two sliding mechanisms (2), a driving mechanism (4) capable of driving the two sliding mechanisms to move forwards and backwards is further arranged at the upper parts of the two sliding mechanisms (2), the sliding mechanism (2) comprises a sliding seat (21) and a gear sliding component (22) which are fixed together, the gear sliding component (22) comprises a pair of rotating gear pieces (221) and a pair of sliding seat driving blocks (222) which are fixedly matched with the sliding seat (21), and the driving mechanism (4) comprises a driving motor (41), The speed reduction box (42) is in transmission connection with the driving motor (41), the driving spline shaft (43) and the two driving gear assemblies (44), the speed reduction box (42) is fixedly connected with the unlocking assembly (3), the two driving gear assemblies (44) are inserted into the corresponding sliding seats (21) and are fixedly connected with the sliding seats, the driving spline shaft (43) is penetrated into the speed reduction box (42) and is in transmission connection with the speed reduction box, the two end parts of the driving spline shaft (43) in the length direction penetrate through the two driving gear assemblies (44) and are in transmission connection with the two driving gear assemblies, and the driving gear assemblies (44) are also connected with the pair of rotating gear members (221) and can drive the two rotating gear members (221) to rotate on the corresponding rack plates (13) so as to realize front-back sliding of the sliding seats (21); The sliding seat (21) of the sliding mechanism (2) is of a strip plate structure, the cross section of the sliding seat is of an omega-shaped structure, the lower end part of the sliding seat (21) is arranged in an open mouth shape, a sliding seat inner cavity (211) extending along the length direction of the sliding seat inner cavity is formed in the hollow space, the sliding seat (21) comprises sliding seat side panels (212) formed on two sides of the sliding seat inner cavity (211), the gear sliding assembly (22) is fixedly arranged at the lower position of the near end part of one end of the sliding seat (21) in the length direction, the rotating gear part (221) comprises a rotating shaft lever (2211) and a rotating straight gear (2212), The rotating shaft lever (2211) passes through the sliding seat side plate (212) and one end part of the rotating shaft lever (2211) in the length direction is connected with the driving mechanism, the rotating straight gear (2212) is meshed with the toothed surface (131) of the rack plate (13) and can roll on the rack plate (13), a sliding seat driving hole (2121) penetrating through the thickness direction of the sliding seat side plate (212) and arranged at a position corresponding to the rotating shaft lever (2211) is formed on the sliding seat side plate (212), the sliding seat driving block (222) is arranged on the rotating shaft lever (2211) of the rotating gear member (221) in a penetrating way, a sliding seat driving block locking step (2221) is formed on the sliding seat driving block (222), The sliding seat driving block locking step (2221) is in locking fit with the sliding seat driving hole (2121), the rotating shaft lever (2211) is in rotating connection with the sliding seat driving block (222), and a bushing (223) is sleeved on the lever body of the rotating shaft lever (2211) and at a position corresponding to the position between the rotating spur gear (2212) and the sliding seat driving block (222); A side transverse plate (213) is formed at the lower end edge of the sliding seat side plate (212) of the sliding seat (21) outwards along the length direction of the sliding seat side plate, a side bending plate (214) is formed at the side edge of the side transverse plate (213) which is far away from the sliding seat side plate (212) body upwards along the length direction of the side transverse plate, and the side bending plate (214) is in a parallel state with the body of the sliding seat side plate (212); A locking piece (24) is arranged in the sliding seat inner cavity (211) of the sliding seat (21), the locking piece (24) comprises a locking plate (241) and a plurality of locking positioning blocks (242) formed on two sides of the locking plate (241) in the length direction, a pushing rod (243) is fixedly arranged at the center position of the locking plate (241) in the length direction, the pushing rod (243) extends upwards along the vertical direction and penetrates through the top surface plate of the sliding seat (21), a pushing rod positioning sleeve (2431) is arranged at the joint of the pushing rod (243) and the top surface plate of the sliding seat (21), A plurality of integrally-through locking positioning block sliding grooves (215) are formed in the side plate (212) and the lateral transverse plate (213) of the sliding seat (21), a plurality of locking positioning blocks (242) penetrate through the corresponding locking positioning block sliding grooves (215) and can slide up and down in the locking positioning block sliding grooves (215), one end part of the locking positioning block (242) far away from the locking plate (241) is in matched connection with the positioning block locking holes (121) on two sides of the opening groove (12), a locking return spring (244) is fixedly penetrated at the positions of the near ends of the two ends of the locking plate (241) in the length direction, The locking return springs (244) are also arranged upwards along the vertical direction, a locking return spring locking hole (2411) is respectively arranged on the locking plate (241) and at the positions corresponding to the two locking return springs (244), the locking return springs (244) penetrate through the locking return spring locking holes (2411) and are fixed in the locking return spring locking holes (2411), the body of the locking return springs (244) positioned at the lower part of the locking return spring locking holes (2411) is of a conical structure with the diameter of the end part at the lowest end part being larger than the diameter of the locking return spring locking holes (2411), namely, the conical structure gradually shrinking upwards, A locking return spring hook (2441) is formed at the upper end part of the locking return spring (244), a locking return spring fixing part (216) is formed on the top panel of the sliding seat (21) at the position corresponding to the two locking return springs (244), and the locking return spring hook (2441) is fixedly connected with the locking return spring fixing part (216); A pair of pressing blocks (25) are further arranged in the sliding seat inner cavity (211) of the sliding seat (21) and at two side positions corresponding to the length direction of the locking piece (24), the pair of pressing blocks (25) are further hinged with a locking assembly (26) respectively, the pressing blocks (25) are of a generally crescent or kidney-shaped structure, one end part of the pressing blocks (25) close to the locking plate (241) is formed into a pressing positioning head (251), the pressing positioning head (251) is positioned at the lower position of the two end parts of the locking plate (241) in the length direction, a pressing block pivot shaft (252) is arranged at the middle position of the pressing blocks (25), The pressing block pivot shaft (252) is penetrated between two sliding seat side panels (212) of the sliding seat (21) and is fixedly connected with the two sliding seat side panels, the pressing block (25) is rotatably connected with the pressing block pivot shaft (252), a pressing block reset spring (253) is fixedly connected on the pressing block (25), the pressing block reset spring (253) extends upwards in an inclined mode, a pressing block reset spring upper hook (2531) is formed at the upper end portion of the pressing block reset spring (253), a pressing block reset spring fixing portion (217) is formed on the top panel of the sliding seat (21) and at the position corresponding to the two pressing block reset springs (253), The pressing block reset spring upper hook (2531) is fixedly connected with the pressing block reset spring fixing part (217), and a hinge shaft locking hole (254) penetrating through the thickness direction of the pressing block (25) is formed at one end part of the pressing block (25) away from the pressing positioning head (251); the locking assembly (26) comprises a pair of locking cams (261), a locking cam connecting shaft (262) fixedly connected with the two locking cams (261) and a locking cam hinging shaft (263), the locking cams (261) are arranged at positions between the side plate (212) of the sliding seat (21) and the side bending plate (214), a locking cam giving-up groove (2131) penetrating through the thickness direction of the side transverse plate (213) is formed in the side transverse plate (213), the locking cams (261) are positioned in the locking cam giving-up groove (2131), the locking cam connecting shaft (262) is penetrated in the inner cavity (211) of the sliding seat (21) and penetrates through the side plate (212) of the sliding seat to be connected with the side bending plate (214), The locking cam hinge shaft (263) is arranged between the two locking cams (261) in a penetrating way and is hinged with the hinge shaft locking hole (254) of the pressing block (25), the locking cams (261) are provided with an upper flange (2611) and a lower flange (2612), the upper flange (2611) is locked with the upper surface of the track inner cavity (11) of the sliding track (1) in a matching way, and the lower flange (2612) is locked with the upper end surface of the rack plate positioning plate (14) in a matching way; And a pair of supporting gear members (27) are further arranged on both sides of the lower position of one end of the sliding seat (21) in the length direction, which is far away from the gear sliding assembly (22), and the pair of supporting gear members (27) are meshed with the rack plate (13).

2. The electric slide rail device of a vehicle seat according to claim 1, characterized in that a pair of rack plate positioning plates (14) extending in a longitudinal direction thereof are formed protruding upward from a bottom plate of the slide rail (1), and both side plates of the slide rail (1) are configured as a pair of slide rail side plates (15), two of the rack plate positioning plates (14) are respectively provided at positions close to the slide rail side plates (15), and a rack plate mounting groove (16) is formed between the two rack plate positioning plates (14) and the slide rail side plates (15) to which they are respectively provided, the rack plate (13) is provided in the rack plate mounting groove (16), and a facing upward side surface of the rack plate (13) is formed with a rack surface (131), a plurality of fitting posts (132) are formed on one side surface of the two rack plates (13) which are respectively opposed to the slide rail side plates (15), a plurality of through holes (151) are formed in a thickness direction at positions corresponding to the plurality of the fitting posts (132), and the rack plate positioning plates (13) are fitted into the rack plate mounting holes (151) to each other, so that the rack plate mounting holes (151) are fitted into the rack plate mounting holes (11).

3. The electric slide rail device of a vehicle seat according to claim 1, characterized in that a pair of trim strips (17) are fitted to an upper portion of a top panel of the slide rail (1), the pair of trim strips (17) extend along a longitudinal direction of the slide rail (1) and are symmetrically provided on both sides of an open groove (12), a row of block locking holes (121) are formed on both sides of the open groove (12), and a plurality of slide rail fixing screws (18) are provided on a bottom panel of the slide rail (1) at intervals along the longitudinal direction thereof.

4. The electric slide rail device of a vehicle seat according to claim 1, characterized in that a seat mount (23) is fixedly provided at both end portions of the slide seat (21) of the slide mechanism (2) in the longitudinal direction, a gap eliminating block (231) is provided at both sides of the lower end portion of the seat mount (23), and a seat mount hole (232) is provided at the upper end portion of the seat mount (23).

5. The electric slide rail device for a vehicle seat according to claim 1, wherein the unlocking assembly (3) comprises an unlocking motor (31), an unlocking spline shaft (32) in driving connection with the unlocking motor (31) and a pair of connection seat plates (33), the two connection seat plates (33) are respectively and fixedly installed at the upper parts of the corresponding sliding seat (21) and the unlocking spline shaft (32) sequentially passes through the two connection seat plates (33), a tongue locking plate (34) is fixedly installed on the shaft body of the unlocking spline shaft (32) and at the position corresponding to the connection seat plate (33), the tongue locking plate (34) is arranged at the upper part of the connection seat plate (33), one end part of the tongue locking plate (34) in the length direction is fixedly connected with the unlocking spline shaft (32) while the other end part of the tongue locking plate is abutted against the upper part of a pushing rod (243) of the sliding mechanism (2), a plurality of connection seat plate fixing holes (331) are formed in the connection seat plate (33), the connection seat plate (331) passes through the pushing rod (243) through the connection seat plate fixing holes (331) and the connection seat plate (332) at the middle part of the connection seat plate fixing holes (243).

6. The electric slide rail device for a vehicle seat according to claim 5, characterized in that the drive motor (41), the reduction box (42) and the drive spline shaft (43) of the drive mechanism (4) are all disposed at the upper position of the slide rail (1), the two drive gear assemblies (44) comprise a hollow drive gear housing box (441) inside, the two drive gear housing boxes (441) are inserted into the corresponding slide seat inner cavities (211), a plurality of housing box fixing bolts (4411) are disposed on the drive gear housing box (441), the drive gear housing box (441) is fixedly connected with the slide seat side plate (212) through the housing box fixing bolts (4411), a power input gear (442), a transition gear (443), a power output gear (444) and a transmission gear (445) which are meshed with each other and can realize transmission connection are sequentially disposed in the hollow inner cavity of the drive gear housing box (441), and the ends of the drive spline shaft (43) in the length direction penetrate through the drive gear housing box (441) and are fixedly connected with one of the two side plates (42) at the lower position of the reduction box (445), and a transmission gear center through hole (4451) penetrating through the transmission gear (445) in the thickness direction is formed in the center position of the transmission gear (445), one end part of the rotating shaft rod (2211) in the length direction is mutually locked and matched with the transmission gear center through hole (4451) to realize the fixed installation of the rotating shaft rod (2211) and the transmission gear (445), so that the rotating straight gear (2212) is driven to slide back and forth on the rack plate (13) through the transmission gear (445), a transmission gear positioning round table (4452) is respectively and convexly arranged at the center position of the two side surfaces of the transmission gear (445), and the transmission gear positioning round table (4452) penetrates through side plates on two sides of the driving gear accommodating box (441) and is in rotating connection with the side plates, so that the rotating connection of the transmission gear (445) and the driving gear accommodating box (441) is realized.

7. The electric slide rail device for a vehicle seat according to claim 6, wherein a transition gear positioning boss (4431) is provided at a center position of both side surfaces in an axial direction of the transition gear (443), both the transition gear positioning bosses (4431) are rotatably fitted to side panels on both sides of the drive gear housing case (441) to thereby rotatably connect the transition gear (443) to the drive gear housing case (441), and similarly, a power output gear positioning boss (4441) is provided at a center position of both side surfaces in an axial direction of the power output gear (444), both the power output gear positioning bosses (4441) are rotatably fitted to side panels on both sides of the drive gear housing case (441) to thereby rotatably connect the power output gear (444) to the drive gear housing case (441).