CN116215335A - Automobile seat slide rail - Google Patents

Abstract

The application relates to the technical field of automobile seats, in particular to an automobile seat sliding rail, which comprises: the fixed rail is symmetrically fixed in the automobile, and the sliding component is arranged on the fixed rail in a sliding manner; the transmission assembly is fixed on the fixed rail; the power supply box is fixed between the two fixed rails; the cable assembly is fixed on one side of one of the fixed rails and comprises a plate wire, a steel wire is arranged between the fixed rail and the plate wire, and a plurality of fixed assemblies are arranged on the steel wire in a sliding manner; the sliding assembly is fixedly connected with the restraint opening assembly, one end of the plate wire, which is connected with the automobile seat, penetrates through the restraint opening assembly, and a shield is covered above the plate wire and is fixedly connected with the automobile. The utility model has the effect of avoiding car seat and stretching the restriction of space to the cable in the direction of height, provide the sufficient extension space of board line in the horizontal direction, satisfy business model simultaneously to the demand of longer cable and abundant seat function to the demand of more cable.

Description

Automobile seat slide rail

Technical Field

The application relates to the technical field of automobile seats, in particular to an automobile seat sliding rail.

Background

The automobile seat is a necessary structure for supporting the load of passengers in operation, so that the passengers keep more comfortable and safe postures, the existing automobile seat adjusting technical scheme is that a fixed rail is arranged on the bottom surface in a carriage, a sliding piece is arranged on the fixed rail in a sliding mode, the seat is arranged on the sliding piece, the sliding piece is driven to slide through a driving motor, the corresponding automobile seat is required to be adjusted in temperature and the like, a wire is required to be arranged to be connected with the automobile seat and a power supply, the existing solution is that an electric wire is attached to the fixed rail and the side of the sliding piece, one end of the electric wire is connected to the other end of the automobile seat to be connected with the power supply, and the electric wire correspondingly stretches and contracts when the sliding piece moves.

With respect to the related art described above, the inventors believe that the electric wire used is generally in a single round shape or a spring shape, the electric wire is entirely located under the car seat, the installation space of the electric wire is limited, the demand for longer cables by commercial car models and the demand for more cables by rich seat functions make the installation of the electric wire more difficult.

Disclosure of Invention

In order to solve the above problems, the present application provides an automobile seat slide rail.

The application provides a car seat slide rail adopts following technical scheme:

a fixed rail arranged in two;

the sliding assembly is arranged on the fixed rail in a sliding manner;

the transmission assembly is fixed on the fixed rail and drives the sliding assembly to slide;

the power supply box is fixed between the two fixed rails, a double-shaft extending motor and a power supply are arranged in the power supply box, and the double-shaft extending motor is in driving connection with the transmission assembly;

the cable assembly is fixed on one side of one of the fixed rails;

the cable assembly comprises a steel wire, a fixing assembly, a plate wire, a binding opening assembly and a housing, wherein the plate wire is arranged in a mode that a flat surface is perpendicular to the bottom surface of an automobile, two ends of the plate wire are respectively a fixed end and a movable end, and the fixed end is connected with the power supply;

the steel wire is arranged between the fixed rail and the plate line in parallel to the length direction of the fixed rail; the plurality of fixing assemblies are arranged, the plurality of fixing assemblies are arranged on the steel wire in a sliding manner, and the plate wire separation sections are fixedly connected with the single fixing assembly;

the beam port assembly is fixedly connected with the sliding assembly, the beam port assembly is located between the fixed rail and the sliding assembly, the beam port assembly and the steel wire can slide relatively, the movable end of the plate wire penetrates through the beam port assembly, and the cover covers the plate wire.

Through adopting above-mentioned technical scheme, when the cable is more, the cable that adopts the spring line to increase can lead to the whole diameter of spring line grow be difficult for flexible, and the cable that adopts the plate line to increase is overlapped along the plate line edge, only can increase the width of plate line, does not influence the folding flexible of plate line, and the plate line is arranged in fixed track's one side with the mode of flat plane perpendicular to car bottom surface moreover, forms to buckle in the horizontal direction when the plate line stretches out and draws back, avoids car seat to the restriction of direction of height, can provide the sufficient extension space of plate line in the horizontal direction.

Optionally, the fixed track bilateral symmetry is fixed with two shells, and the shell tip buckle has the end cover, two at the shell medial surface is parallel to the fixed track is fixed with the rubber strip respectively, two laminating each other between the rubber strip.

Through adopting above-mentioned technical scheme, protect the base and other parts of being connected on it through setting up shell and end cover shell, extra through setting up the rubber strip, under the condition that does not interfere the slip subassembly regulation, further block debris and fall into on the base.

Optionally, the board line is provided with fixed bending point and elasticity bending point at intervals in proper order, the board line is in fixed bending point and elasticity bending point bend opposite direction, just fixed bending point is the board line is with fixed subassembly fixed connection's position, adjacent the distance is the same between fixed bending point and the elasticity bending point, just the distance is adjustable between fixed bending point and the elasticity bending point.

Through adopting above-mentioned technical scheme, the distance between adjacent fixed bending point and the elasticity bending point is the same for the board line is more regular under the folded condition, and the distance between fixed bending point and the elasticity bending point is from big to little, under the unchangeable circumstances of board line length, fixed bending point and elasticity bending point quantity from less to many, corresponds the board line folding from easy to difficult, and wherein the distance between fixed bending point and the elasticity bending point directly influences the position of slider under the complete folded condition of board line, can satisfy more adjustment demands through adjusting the distance between fixed bending point and the elasticity bending point.

Optionally, a fixing plate is slidably disposed on the steel wire, a guide hole allowing the steel wire to pass through is formed in the fixing plate, a fixing hole is further formed in the fixing plate, a binding belt passes through the fixing hole, one end of the binding belt passes through the fixing hole and then reversely passes through the fixing bending point, and then is connected with the other end of the binding belt for retraction, so that the plate wire is fixedly connected with the fixing plate.

Through adopting above-mentioned technical scheme, to the board line of different width, can be fast convenient accomplish fixedly through the ribbon, can adapt to the board line of different width again.

Optionally, be fixed with the beam rack on the slip subassembly, the beam rack is the turning shape, beam rack is inside to be offered and to allow the metallic channel that the board line passed, beam rack one end is in fixed track one side orientation the steel wire extends, makes metallic channel one end is kept away from fixed track still offer the cooperation groove on the beam rack, the cooperation inslot is fixed with the connecting piece, offer the settling on the connecting piece the notch of steel wire, the connecting piece can for the steel wire relative slip.

Through adopting above-mentioned technical scheme, offer the metallic channel in the beam frame for the board line passes the metallic channel in advance before being connected with car seat, and fixed track is kept away from to metallic channel one end moreover, effectively avoids board line and fixed track contact, effectively prevents that the board line from being worn by fixed track in the extension process.

Optionally, the transmission assembly includes two lead screws and two gear boxes, every the lead screw corresponds one the gear box, the inside gear assembly that is provided with of gear box, the gear assembly drive is connected the lead screw, the lead screw drive is connected the slip subassembly.

By adopting the technical scheme, the transmission stability is ensured by the transmission of the two screw rods.

Optionally, the sliding component includes slider, fixed block and shell, the slider is single the slip is provided with two on the fixed track, every on the slider all be fixed with a fixed block, on single the fixed track the fixed block symmetry is arranged, and is fixed with the shell on the fixed block.

Through adopting above-mentioned technical scheme, with fixed block and slider fixed connection for the fixed block can carry out synchronous slip with the slider, is connected with two fixed blocks with the clamping shell, and the fixed block that makes single base correspond can synchronous slip.

Optionally, a mounting groove and a through hole are formed in the sliding block, a driving nut in threaded fit with the screw rod is fixedly placed in the mounting groove, and the through hole allows the screw rod to pass through.

Through adopting above-mentioned technical scheme, offer the cooperation groove at the slider up end, place drive nut in the cooperation inslot, be making lead screw and drive nut screw-thread fit, drive nut is motionless for the slider this moment, rotates the drive of lead screw realization to the slider, compares on directly fixing drive nut on the slider, under the prerequisite of this application realization same function, whole compacter.

Optionally, the transmission assembly further includes a support and a protective housing, the support is fixed on the fixed rail, and the protective housing is sleeved with the gear box and fixedly connected with the support.

Through adopting above-mentioned technical scheme, further fix the gear box through the protective housing, guarantee that the gear box is more firm.

Optionally, the gear box includes gear assembly, fixed shell and rubber sleeve, wherein gear assembly is worm wheel cover and worm, worm wheel cover and worm are driven with intermeshing's mode, wherein the worm wheel cover with lead screw fixed connection rotates in step, the worm with biax is stretched motor output fixed connection and is rotated in step, the fixed shell sets up outside the gear assembly, the rubber sleeve cover is in the fixed shell both ends.

Through adopting above-mentioned technical scheme, cup joint at the fixed shell both ends through with the rubber sleeve for it is isolated through the rubber sleeve between gear box and support and the protective housing, avoid in the course of the work, the rigid contact is not hard up between gear box and support and the protective housing produces the noise.

In summary, the present application includes at least one of the following beneficial technical effects:

1. in the application, when more cables are arranged, the cables increased by the spring wires can cause the whole diameter of the spring wires to be enlarged and not easy to stretch, the cables increased by the plate wires are overlapped along the edges of the plate wires, only the width of the plate wires can be increased, folding and stretching of the plate wires are not affected, the plate wires are arranged on one side of a fixed rail in a mode that flat surfaces are perpendicular to the bottom surface of an automobile, bending is formed in the horizontal direction when the plate wires stretch, the limitation of the automobile seat to the height direction is avoided, and enough stretching space of the plate wires can be provided in the horizontal direction;

2. when the beam frame slides in this application, the board line is synchronous to be stretched and folded wherein fixed subassembly slides on the steel wire, and when process speed is very fast, the steel wire is easy to swing and is deflected and lead to the fixed plate to slide relatively with non-vertical state with the steel wire relatively, and then noise appears in the follow-up, restrict the steel wire through the connecting piece in both sides swing and avoid producing the noise, rubber sleeve has certain thickness at the fixed shell both ends simultaneously for it is isolated through the rubber sleeve between gear box and support and the protective housing, avoids the gear box to make hard contact hard up production noise between gear box and support and the protective housing in the course of the work.

Drawings

FIG. 1 is a schematic view of the overall structure of a seat track of an automobile;

FIG. 2 is a schematic view of a partial structure of a slide rail of an automobile seat in a cutaway;

FIG. 3 is a schematic view of a gear box structure of an automotive seat track;

FIG. 4 is a schematic view of a fastening assembly and wire harness structure of an automotive seat track;

FIG. 5 is a schematic view of a collar assembly of an automotive seat track;

reference numerals: 1. a fixed rail; 2. a sliding assembly; 21. a slide block; 22. a fixed block; 23. a shell; 3. a transmission assembly; 31. a support; 32. a gear box; 321. a worm wheel sleeve; 322. a worm; 323. a fixed case; 324. a rubber sleeve; 33. a protective shell; 34. a screw rod; 4. a power supply box; 5. a cable assembly; 51. a steel wire; 52. a fixing assembly; 521. a fixing plate; 522. a tie; 523. a guide hole; 524. a fixing hole; 53. a plate line; 531. fixing bending points; 532. an elastic bending point; 54. a bundle port assembly; 541. a wire harness frame; 542. a mating groove; 543. a wire groove; 544. a connecting piece; 55. a housing; 6. an adapter; 7. a housing; 8. rubber strips.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses an automobile seat slide rail.

As shown in fig. 1, there are two fixed rails 1, and a sliding component 2 is slidably disposed on the fixed rails 1, an adaptor 6 is fixed on the sliding component 2, and the specific adaptor 6 is a structural member with upper and lower ends capable of being fixedly connected with the automobile seat and the sliding component 2 respectively, and the automobile seat and the sliding component 2 are connected through the adaptor 6, so that the automobile table and the chair move synchronously along with the sliding component 2.

As shown in fig. 1-3, a transmission assembly 3 is fixed on a fixed track 1, the transmission assembly 3 comprises two screw rods 34 which enable transmission to be stable, and further comprises two gear boxes 32 which are internally provided with a worm wheel sleeve 321 and a worm 322, the worm wheel sleeve 321 and the worm 322 are transmitted in a mutual meshing mode, the worm wheel sleeve 321 is fixedly connected with the screw rods 34, and the screw rods 34 synchronously rotate along with the worm wheel sleeve 321.

As shown in fig. 1 and 2, a sliding component 2 is further slidably disposed on the fixed rail 1, where the sliding component 2 includes a slider 21 provided with a placement groove and a through hole, a driving nut is fixedly disposed in the slider 21, and a screw rod 34 passes through the through hole to be in threaded engagement with the driving nut, and when the screw rod 34 rotates, the sliding component 2 slides along with the driving nut.

As shown in fig. 1-3, a power supply box 4 is fixedly arranged between two fixed rails 1, a double-shaft extending motor and a power supply are arranged in the power supply box 4, the two output shafts of the double-shaft extending motor synchronously rotate, one output end of the double-shaft extending motor is fixedly connected with two worm 322 of a gear box 32 on one fixed rail 1, the worm 322 synchronously rotates along with the output end of the double-shaft extending motor, and compared with synchronous driving by adopting a plurality of motors, the synchronous state of the double-shaft extending motor is better.

As shown in fig. 1, two shells 7 are symmetrically fixed on two sides of the fixed rail 1, end covers are buckled at the ends of two protective shells 33, rubber strips 8 are respectively fixed on the inner side surfaces of the two shells 7 parallel to the fixed rail 1, and the two rubber strips 8 are mutually attached.

As shown in fig. 2, a cable assembly 5 is disposed inside one of the fixed rails 1, the cable assembly 5 includes a steel wire 51, a fixing assembly 52, a plate wire 53, a collar assembly 54 and a housing 55, wherein two ends of the steel wire 51 are respectively fixed with the power box 4 and the automobile, the plate wire 53 is disposed on one side of the steel wire 51 in a manner that a flat surface is perpendicular to the bottom surface of the automobile, the plate wire 53 is fixedly connected with the single fixing assembly 52 at a distance, two ends of the plate wire 53 are respectively a fixed end and a movable end, the fixed end is connected with a power supply, the collar assembly 54 is located between the fixed rail 1 and the sliding assembly 2, the collar assembly 54 is relatively slidable with the steel wire 51, the movable end of the plate wire 53 passes through the collar assembly 54, and the housing 55 covers over the plate wire 53.

As shown in fig. 4, the fixing assembly 52 includes a fixing plate 521 and a binding belt 522, wherein the fixing plate 521 is formed by processing a steel plate, a guide hole 523 allowing the steel wire 51 to pass through is formed in the fixing plate 521, the fixing plate 521 can slide on the steel wire 51 by matching the guide hole 523 with the steel wire 51, and it should be explained that lubricating oil needs to be applied on the steel wire 51 to ensure the sliding stability and reduce noise.

As shown in fig. 4, the plate line 53 is sequentially and uniformly provided with fixed bending points 531 and elastic bending points 532 at intervals, so that the plate line 53 is folded in the stretching process, and the bending directions of the plate line 53 at the fixed bending points 531 and the elastic bending points 532 are opposite, so that the plate line 53 is folded into a waveform as a whole.

And still set up fixed hole 524 at fixed plate 521, pass ribbon 522 in fixed hole 524, the one end of specific ribbon 522 passes fixed hole 524 and passes fixed bending point 531 in the reverse, later connect the receipts with the other end of ribbon 522, with board line 53 and fixed plate 521 fixed connection, it should be explained, to the board line 53 of different width, can accomplish fixed fast convenient through ribbon 522, can adapt to the board line 53 of different width again.

As shown in fig. 2 and 5, the wire harness 541 is fixed on the sliding component 2, the wire harness 541 is in a corner shape, the specific wire harness 541 is a processed sheet metal part, a wire groove 543 allowing the plate wire 53 to pass through is formed in the wire harness 541, one end of the wire harness 541 extends towards the steel wire 51 at one side of the fixed track 1, so that one end of the wire groove 543 is far away from the fixed track 1, the plate wire 53 passes through the wire groove 543 in advance before being connected with the automobile seat, one end of the wire groove 543 is far away from the fixed track 1, the plate wire 53 is effectively prevented from contacting the fixed track 1, and the plate wire 53 is effectively prevented from being worn by the fixed track 1 in the stretching process.

As shown in fig. 2 and 5, a mating groove 542 is further formed in the wire harness 541, a connecting member 544 is fixed in the mating groove 542, the connecting member 544 is a cylindrical insert with a flange, a notch for accommodating the wire 51 is formed in the connecting member 544, the connecting member 544 can slide relatively to the wire 51, the connecting member 544 is inserted into the mating groove 542 to be fixed with the wire harness 541, and the connecting member 544 is placed on the wire 51 through the notch to limit the swinging offset of the wire 51 to both sides.

It should be noted that, when the wire harness 541 slides, the plate wire 53 is synchronously stretched and folded, where the fixing component 52 slides on the steel wire 51, and when the process speed is high, the steel wire 51 is easy to swing and deflect, so that the fixing plate 521 slides relatively to the steel wire 51 in a non-vertical state, and further noise occurs later, the swinging of the steel wire 51 on both sides is limited by the connecting piece 544, so that noise is further avoided.

As shown in fig. 2, the sliding assembly 2 includes a sliding block 21 slidably disposed on the fixed rail 1, two sliding blocks 21 are disposed on the single fixed rail 1, two fixed blocks 22 are respectively fixed on the two sliding blocks 21, the two fixed blocks 22 are symmetrically disposed, a shell 23 is fixed at the upper end of the fixed block 22, two placement grooves are symmetrically disposed on the sliding block 21, a driving nut matched with the screw rod 34 is disposed in the placement groove, and a through hole allowing the screw rod 34 to pass through is further disposed on the sliding block 21.

As shown in fig. 1-3, the transmission assembly 3 further includes a support 31 and a protective shell 33, the support 31 is fixed on the fixed track 1, the protective shell 33 is sleeved with the gear box 32 and fixedly connected with the support 31, the gear box 32 includes a gear assembly, a fixed shell 323 and a rubber sleeve 324, the gear assembly is a worm wheel sleeve 321 and a worm 322, the worm wheel sleeve 321 and the worm 322 are in transmission in a manner of being meshed with each other, the worm wheel sleeve 321 is fixedly connected with a screw rod 34, the screw rod 34 follows the worm wheel sleeve 321 to rotate synchronously, the worm 322 is fixedly connected with the output end of the dual-shaft motor to rotate synchronously, the fixed shell 323 is arranged outside the gear assembly, the rubber sleeve 324 is sleeved at two ends of the fixed shell 323, and it is to be explained that the rubber sleeve 324 has a certain thickness, so that the gear box 32 is isolated from other components through the rubber sleeve 324, and the noise is further reduced by avoiding rigid contact.

The implementation principle of the automobile seat slide rail provided by the embodiment of the application is as follows: the output end of the double-shaft stretching motor in the power box 4 drives the worm 322 to synchronously rotate, the worm 322 and the worm gear sleeve 321 are meshed and driven to drive the screw rod 34 fixedly connected with the worm gear sleeve 321 to rotate, the screw rod 34 is in threaded fit with the driving nut, the driving nut moves along the axis direction of the screw rod 34 in the process, meanwhile, the sliding component 2 and the automobile seat, which are relatively fixed with the driving nut, are driven to slide, at the moment, one end of the plate wire 53 moves synchronously along with the automobile seat, and the plate wire 53 is driven to stretch and fold at the fixed bending point 531 and the elastic bending point 532.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. An automobile seat slide rail, characterized in that: comprising the following steps:

a fixed rail (1) arranged in two;

the sliding assembly (2) is arranged on the fixed rail (1) in a sliding manner;

the transmission assembly (3) is fixed on the fixed rail (1) and drives the sliding assembly (2) to slide;

the power supply box (4) is fixed between the two fixed rails (1), a double-shaft extension motor and a power supply are arranged in the power supply box (4), and the double-shaft extension motor is in driving connection with the transmission assembly (3);

a cable assembly (5) fixed to one side of one of the fixed rails (1);

the cable assembly (5) comprises a steel wire (51), a fixing assembly (52), a plate wire (53), a binding opening assembly (54) and a housing (55), wherein the plate wire (53) is arranged in a mode that a flat surface is perpendicular to the bottom surface of an automobile, two ends of the plate wire (53) are respectively a fixed end and a movable end, and the fixed end is connected with the power supply;

the steel wire (51) is arranged between the fixed rail (1) and the plate line (53) in parallel to the length direction of the fixed rail (1); the plurality of fixing assemblies (52) are arranged on the steel wire (51) in a sliding manner, and the plate wire (53) is fixedly connected with the single fixing assembly (52) at intervals;

the beam mouth component (54) is fixedly connected with the sliding component (2), the beam mouth component (54) is located between the fixed rail (1) and the sliding component (2), the beam mouth component (54) and the steel wire (51) can slide relatively, the movable end of the plate wire (53) penetrates through the beam mouth component (54), and the cover shell (55) covers the plate wire (53).

2. The automotive seat slide of claim 1, wherein: two shells (7) are symmetrically fixed on two sides of the fixed track (1), end covers are buckled at the ends of the shells (7), rubber strips (8) are respectively fixed on the inner side faces of the two shells (7) parallel to the fixed track (1), and the two rubber strips (8) are mutually attached.

3. The automotive seat slide of claim 1, wherein: the fixed bending points (531) and the elastic bending points (532) are sequentially arranged on the plate line (53) at intervals, the bending directions of the fixed bending points (531) and the elastic bending points (532) are opposite, the fixed bending points (531) are positions, fixedly connected with the fixed assembly (52), of the plate line (53), the distances between the adjacent fixed bending points (531) and the elastic bending points (532) are the same, and the distances between the fixed bending points (531) and the elastic bending points (532) are adjustable.

4. A car seat slide as claimed in claim 3, wherein: the steel wire (51) is provided with a fixing plate (521) in a sliding manner, the fixing plate (521) is provided with a guide hole (523) allowing the steel wire (51) to pass through, the fixing plate (521) is also provided with a fixing hole (524), a binding belt (522) passes through the fixing hole (524), one end of the binding belt (522) passes through the fixing hole (524) and then reversely passes through the fixing bending point (531) to be connected with the other end of the binding belt for bundling, and the plate wire (53) is fixedly connected with the fixing plate (521).

5. The automotive seat slide of claim 4, wherein: the utility model discloses a wire harness frame, including slip subassembly (2), slip subassembly (2) are fixed with beam line frame (541), beam line frame (541) are the turning shape, beam line frame (541) inside has seted up and has allowed wire groove (543) that board line (53) passed, beam line frame (541) one end is in fixed track (1) one side orientation wire (51) extend, make wire groove (543) one end keep away from fixed track (1) beam line frame (541) are last still to have seted up mating groove (542), be fixed with connecting piece (544) in mating groove (542), set up on connecting piece (544) and settle the notch of wire (51), connecting piece (544) can for wire (51) relative slip.

6. The automotive seat slide of claim 1, wherein: the transmission assembly (3) comprises two screw rods (34) and two gear boxes (32), each screw rod (34) corresponds to one gear box (32), a gear assembly is arranged inside the gear box (32), the gear assembly is in driving connection with the screw rods (34), and the screw rods (34) are in driving connection with the sliding assembly (2).

7. The automotive seat slide of claim 6, wherein: the sliding assembly (2) comprises sliding blocks (21), fixing blocks (22) and shells (23), wherein two sliding blocks (21) are arranged on a single fixing rail (1) in a sliding mode, one fixing block (22) is fixed on each sliding block (21), the fixing blocks (22) are symmetrically arranged on the single fixing rail (1), and the shells (23) are fixed on the fixing blocks (22).

8. The automotive seat slide of claim 7, wherein: the sliding block (21) is provided with a mounting groove and a through hole, a driving nut which is in threaded fit with the screw rod (34) is fixedly arranged in the mounting groove, and the through hole allows the screw rod (34) to pass through.

9. The automotive seat slide of claim 8, wherein: the transmission assembly (3) further comprises a support (31) and a protective shell (33), wherein the support (31) is fixed on the fixed rail (1), and the protective shell (33) is sleeved with the gear box (32) to be fixedly connected with the support (31).

10. The automotive seat slide of claim 9, wherein: the gear box (32) comprises a gear assembly, a fixed shell (323) and a rubber sleeve (324), wherein the gear assembly is a worm wheel sleeve (321) and a worm (322), the worm wheel sleeve (321) and the worm (322) are driven in a mutual meshing mode, the worm wheel sleeve (321) and the screw rod (34) are fixedly connected and synchronously rotate, the worm (322) and the output end of the double-shaft motor are fixedly connected and synchronously rotate, the fixed shell (323) is arranged outside the gear assembly, and the rubber sleeve (324) is sleeved at two ends of the fixed shell (323).

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