Zero-gravity seat of vehicle

Abstract

The utility model discloses a zero-gravity seat of a vehicle and belongs to the technical field of automobile seats. Comprising a pair of electric long sliding rail assemblies. The seat frame assembly is fixedly connected to the two sliding rail assemblies; the seat basin framework is movably mounted on the seat frame assembly; the backrest framework is rotatably connected to the seat basin framework; the angle adjuster assembly is mounted at the connecting position of the backrest framework and the seat basin framework and is used for driving the backrest framework to rotate; the follow-up armrest assembly is linked with the angle adjuster assembly, and the follow-up armrest assembly is suitable for moving synchronously with the backrest framework; the leg support assembly is installed at the front end of the seat basin framework, and the leg support assembly is suitable for achieving synchronous movement with the seat basin framework and can achieve stretching and contracting of components of the leg support assembly; the seat basin lifting assemblies are connected to the left side and the right side of the front portion of the seat basin framework respectively. The mechanism has the advantages that the zero-gravity posture adjustment work of the seat is efficiently achieved, operation is stable and reliable, it is guaranteed that the armrests follow the seat backrest, and the riding comfort of passengers is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seats, and in particular relates to a zero-gravity seat for a vehicle. Background Art

[0002] With the improvement of people's living standards and the continuous advancement of science and technology, the automobile industry has developed by leaps and bounds, and people's requirements for automobile quality and comfort have continued to increase. As one of the important components of the car, the superior seat design can bring a comfortable riding experience to the passengers, and the above-mentioned zero-gravity seat refers to a zero-gravity healthy posture seat. Zero gravity refers to the human body's weightlessness. In this case, the pressure of the human body on the support is lower than its own gravity, which in turn will show this floating feeling, which is equivalent to the human body being in this weightless environment; the zero-gravity seat can provide passengers with a more ergonomic and healthier riding posture. Specifically, the zero-gravity seat posture can help reduce spinal pressure, relax back muscles, reduce heart pressure, and promote blood circulation. It can enhance the ride comfort of the car, put people in a natural state, curb the discomfort caused by gravity, and better protect the health of the occupants; and the existing zero-gravity seats are generally placed in the second row of MPV (multi-purpose vehicle) or large SUV vehicles. By realizing the large-angle tilt of the backrest, the leg support extension support and the lifting of the front of the seat basin, the human thigh and waist are more than 120 degrees, and the calf and thigh are close to 125 degrees. There is a floating feeling when sitting on the seat, which makes people feel completely relaxed, thereby releasing the pressure of the human body to the greatest extent. However, existing zero-gravity seat structures generally have problems such as being too complex, having many components, and being difficult to adjust. The smoothness of operation cannot be effectively guaranteed, and there is much room for improvement in the overall structure. In addition, during the adjustment of the zero-gravity seat, the overall torso posture of the driver and passenger will change accordingly with the rotation of the seat, and the position of the back and arms will naturally change as well. However, the posture change of the armrest mechanism of the existing zero-gravity seat is limited and it will not change accordingly with the rotation of the seat back. After the seat is changed, the armrest mechanism is still only suitable for the body state in which the torso is in a vertical position, causing the arm part of the human body to lose support, resulting in the inability of the hands to leverage, and also making the posture of the driver and passenger very awkward, greatly reducing the riding comfort of the driver and passenger, and also greatly reducing the comfort of the zero-gravity seat.

[0003] In view of the above situation, it is necessary to reasonably improve the existing vehicle zero gravity seat. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The purpose of the utility model is to provide a vehicle zero-gravity seat with a compact structure, smooth and reliable operation, and good user experience, which helps to efficiently and conveniently adjust the zero-gravity posture of the seat and ensure that the armrest moves with the seat back, thereby effectively improving the riding comfort of passengers.

[0005] The purpose of the utility model is achieved in this way: a vehicle zero gravity seat, comprising:

[0006] A pair of electric long slide rail assemblies;

[0007] A seat frame assembly, which is fixedly connected to the two electric long slide rail assemblies and can slide back and forth along the inner slide rails in the electric long slide rail assemblies;

[0008] A basin frame, the basin frame being movably mounted on the seat frame assembly;

[0009] a backrest frame, the backrest frame being rotatably connected to the seat basin frame;

[0010] a recliner assembly, which is installed at the connection position between the backrest frame and the seat basin frame, and is used to drive the backrest frame to rotate;

[0011] A follower armrest assembly, which is installed at one side of the middle part of the backrest frame in the height direction and is linked with the recliner assembly, and is suitable for synchronous movement with the backrest frame;

[0012] a leg support assembly, the leg support assembly being mounted on the front end of the seat basin frame, and the leg support assembly being adapted to achieve synchronous movement with the seat basin frame and capable of achieving extension and contraction of its own components;

[0013] A pair of seat basin lifting assemblies, the two seat basin lifting assemblies are respectively connected to the left and right sides of the front part of the seat basin frame and fixed to the seat frame assembly, and the pair of seat basin lifting assemblies are used to adjust the inclination angle of the seat basin frame.

[0014] In a specific embodiment of the present invention, the two electric long slide rail assemblies each include an outer slide rail connected to the bottom plate of the vehicle body, the inner slide rail in the electric long slide rail assembly is slidably connected to the outer slide rail, the inner slide rail is fixedly connected to the seat frame assembly and can drive the seat frame assembly to slide back and forth; and the seat frame assembly includes a frame body, a pair of front slide rail connecting seats, a pair of rear slide rail connecting seats and a pair of seat frame connecting frames; the frame body is arranged at an upper position of a pair of electric long slide rail assemblies, and the two front slide rail connecting seats are respectively fixedly connected to the frame The two rear slide rail connecting seats are respectively fixed on the left and right sides of the lower front part of the frame body, and the lower parts of the two front slide rail connecting seats are respectively connected to the near front end parts of the corresponding inner slide rails, while the lower parts of the two rear slide rail connecting seats are respectively connected to the near rear end parts of the corresponding inner slide rails, thereby realizing the connection between the seat frame assembly and a pair of inner slide rails; the two seat frame connecting frames are installed on the left and right sides of the upper rear part of the frame body, and the two seat frame connecting frames are pivotally connected to the seat basin frame.

[0015] In another specific embodiment of the present invention, the seat basin frame is provided with a pair of seat basin side panels, a front transverse tube, a rear transverse tube and a seat basin mounting frame plate; wherein, the two seat basin side panels are arranged at the upper position of the seat frame assembly, and the two seat basin side panels are symmetrically arranged at intervals and are pivotally connected to the seat frame assembly, the front transverse tube is connected between the front end portions of the two seat basin side panels, and the rear transverse tube is connected between the rear end portions of the two seat basin side panels, and the seat basin mounting frame plate is integrally installed on the upper portion of the front ends of the two seat basin side panels.

[0016] In another specific embodiment of the present invention, the backrest frame includes a pair of backrest side brackets, a lower backrest bracket, an upper backrest bracket and a backrest supporting bracket; the pair of backrest side brackets are arranged opposite to each other, and the backrest side brackets are hollow inside and form a backrest side bracket inner cavity, and the bottoms of the two backrest side brackets are rotatably connected to the seat basin frame through the angle adjuster assembly; the lower backrest bracket is connected between the bottoms of the two backrest side brackets, the upper backrest bracket is connected between the tops of the two backrest side brackets, and the backrest supporting bracket is connected between the middle and upper parts of the two backrest side brackets in the height direction.

[0017] In another specific embodiment of the present invention, the recliner assembly includes a recliner drive motor, a pair of recliner bodies, a recliner drive shaft, a pair of recliner mounting brackets and a pair of backrest connecting brackets; the recliner drive motor is installed on the inner side of a backrest side bracket of the backrest frame, and the two recliner bodies are respectively installed at the bottom positions of the inner sides of the two backrest side brackets, the recliner drive shaft is horizontally penetrated between the bottom parts of the two backrest side brackets, and the recliner drive shaft passes through the two recliner bodies to realize transmission connection therewith, the recliner drive shaft is accommodated as a whole in the lower backrest bracket, the recliner drive motor is used to drive the recliner drive shaft to rotate, and the recliner The output end of the angle adjuster driving motor is connected to the angle adjuster driving shaft; the upper parts of the two angle adjuster mounting brackets are connected to the corresponding angle adjuster bodies, and the lower parts of the two angle adjuster mounting brackets are respectively fixedly mounted on the seat basin side panels on both sides of the seat basin frame, thereby realizing the connection between the two angle adjuster bodies and the corresponding seat basin side panels; the bottom parts of the two backrest connecting brackets are connected to the corresponding angle adjuster bodies, and the upper parts of the backrest connecting brackets are fixedly mounted on the backrest side brackets on both sides of the backrest frame. The backrest connecting brackets can realize their own rotation under the drive of the angle adjuster body and drive the backrest side brackets to rotate, thereby realizing the angle adjustment of the backrest frame.

[0018] In another specific embodiment of the present invention, the follow-up armrest assembly includes an armrest frame, a linkage transmission unit, a drive spline shaft, a transmission disk and a transmission locking unit; the armrest frame is arranged at a side position of the backrest frame, the linkage transmission unit is transmission-connected to the recliner drive shaft of the recliner assembly, and the drive spline shaft is connected to the upper output end of the linkage transmission unit and passes through the backrest side bracket of the backrest frame outward, the transmission disk is arranged on the outside of the backrest side bracket, and the drive spline shaft passes through the transmission disk and realizes transmission connection with it, and the transmission locking unit is arranged between the transmission disk and the armrest frame and realizes transmission connection with the two. The transmission locking unit can drive the armrest frame to rotate under the drive of the transmission disk and can realize the locking of the armrest frame; wherein the linkage transmission unit includes a driving wheel, a driven wheel, a synchronous belt and a protective cover body, the driving wheel, the driven wheel and the synchronous belt are all accommodated in the inner cavity of the protective cover body, the driving wheel is sleeved on the shaft body of the angle adjuster driving shaft and can realize its own rotation under the drive of the angle adjuster driving shaft, and the driven wheel is sleeved on the shaft body of the driving spline shaft, and the driving wheel is arranged at a position corresponding to the lower position of the driven wheel, and the synchronous belt is sleeved and connected between the driving wheel and the driven wheel, so that the driving wheel and the driven wheel can realize synchronous rotation and achieve the adjustment The transmission connection between the angle encoder driving shaft and the driving spline shaft; an external spline is arranged on the shaft body of the driving spline shaft, and an internal spline hole is arranged in the transmission disk, the shape of the internal spline hole is adapted to the shape of the external spline, and the external spline can be fitted and installed in the internal spline hole, thereby realizing the fitting connection between the driving spline shaft and the transmission disk; the transmission locking unit comprises an inner cover shell, an outer cover shell, a connecting locking assembly and an armrest driving shaft, the inner cover shell is arranged close to the transmission disk, and the inner cover shell is connected to the transmission disk and the transmission disk can drive the inner cover shell to rotate, the outer cover shell is arranged at a position close to the armrest frame, and the connecting locking assembly is arranged between the inner cover shell and the outer cover shell. The armrest drive shaft passes through the connecting locking assembly and the outer cover shell, and the armrest drive shaft and the connecting locking assembly realize transmission connection, the armrest drive shaft is also inserted into the armrest frame and can drive the armrest frame to rotate; the armrest frame is in a strip plate structure, and an armrest frame connecting hole is also provided on one end portion of the armrest frame close to the transmission locking unit in the length direction, and an armrest drive shaft transmission component is also installed at the end portion of the armrest drive shaft of the transmission locking unit in the length direction, the armrest drive shaft transmission component is inserted into the armrest frame connecting hole and is installed together with the armrest frame, thereby realizing the transmission connection between the armrest drive shaft and the armrest frame.

[0019] In a further specific embodiment of the present invention, the leg rest assembly includes a fixed bracket assembly, a connecting rod assembly that can be unfolded and stored, a leg rest mounting assembly, a leg rest carrier and a leg rest driving device; wherein the fixed bracket assembly is fixedly connected to the front end portion of the seat basin frame, the connecting rod assembly is hinged at the front position of the fixed bracket assembly, the leg rest mounting assembly is mounted at the front position of the connecting rod assembly away from the fixed bracket assembly, the leg rest carrier is fixedly mounted on the leg rest mounting assembly, and the leg rest driving device is fixedly mounted on a side of the connecting rod assembly close to the fixed bracket assembly, and the leg rest driving device is used to drive the connecting rod assembly to realize unfolding and storage operations; the fixed bracket The frame assembly includes a pair of fixed bracket mounting plates symmetrically arranged at intervals and a fixed bracket connecting crossbeam connected between the two fixed bracket mounting plates, a fixed bracket mounting plate connecting seat is connected to each of the two fixed bracket mounting plates, and the fixed bracket mounting plate connecting seat is fixedly connected to the front part of the seat basin frame; the connecting rod assembly includes a transversely arranged driving crossbeam, a pair of power arms, a pair of power arm connecting rods, a pair of adjusting connecting rods, a pair of leg support connecting rods and a pair of supporting connecting rods, the two power arms are symmetrically arranged at intervals and one end portion of the two power arms in the length direction is respectively hinged to the corresponding fixed bracket mounting plates, the driving crossbeam is arranged between the two power arms and is positioned close to the power arms and the fixed At the position of the hinged part of the fixed bracket mounting plate, the two power arm connecting rods are respectively cross-stacked with the corresponding power arms, and the middle parts of the power arm connecting rod and the power arm in the length direction are hinged together, one end part of the two adjusting connecting rods in the length direction is respectively hinged with one end part of the corresponding power arm connecting rod in the length direction, and the other end part of the two adjusting connecting rods in the length direction is respectively hinged with the corresponding fixed bracket mounting plate, one end part of the two leg support connecting rods in the length direction is respectively hinged with one end part of the corresponding power arm in the length direction away from the fixed bracket mounting plate, and one end part of the two supporting connecting rods in the length direction is respectively hinged with the corresponding The end portion of a power arm connecting rod in the length direction away from the adjusting connecting rod is hinged together, and the middle positions of the two supporting connecting rods are respectively hinged together with the end portions of the corresponding leg support connecting rods in the length direction away from the power arm; the leg support mounting assembly is fixedly mounted on the two supporting connecting rods as a whole, and the leg support mounting assembly comprises a pair of laterally arranged leg support cross plates and a leg support support plate, the two leg support cross plates are respectively fixedly mounted on the two supporting connecting rods of the connecting rod assembly in an upper and lower spaced state, the leg support support plate is connected at a middle position between the two leg support cross plates in a state perpendicular to the two leg support cross plates, and the leg support bearing body is fixedly mounted on the frame body formed by the two leg support cross plates and the leg support support plate as a whole.

[0020] In a more specific embodiment of the present invention, the leg support driving device includes a leg support driving motor, a transmission box, a transmission box mounting frame, a threaded screw and a driving bracket; the transmission box mounting frame is fixedly connected to the fixed bracket connecting beam of the fixed bracket assembly, and the transmission box is fixedly connected at a side position of the transmission box mounting frame, the leg support driving motor is arranged at a side position of the transmission box opposite to the transmission box mounting frame, the threaded screw is penetrated through the transmission box and is connected to the leg support driving motor by transmission, and the leg support driving motor pushes the threaded screw to realize its short-distance telescopic movement through cooperation with the transmission box, and the driving bracket is rotatably connected to one end of the threaded screw close to the connecting rod assembly in the length direction of the threaded screw, and the end of the driving bracket away from the threaded screw is C-shaped and semi-enclosed and welded to the driving beam of the connecting rod assembly.

[0021] In a further specific embodiment of the present invention, a pair of the seat basin lifting assemblies are symmetrically arranged at intervals, and the two seat basin lifting assemblies each include a positioning assembly, a lifting drive motor, a power gear box, a driving gear member, a guide plate, a first rack plate I, a second rack plate II and a seat basin connecting assembly; wherein the positioning assembly includes a power gear box body fixing bracket and a lifting positioning bracket which are arranged opposite to each other at intervals and connected to each other, and a positioning cavity is formed between the power gear box body fixing bracket and the lifting positioning bracket, and the bottom transverse plate of the power gear box body fixing bracket is fixedly installed on the seat frame assembly, The bottom transverse plate of the lifting and positioning bracket is also fixedly mounted on the seat frame assembly; the power gear box is fixedly mounted on the power gear box body fixing bracket and positioned outside the positioning cavity, the lifting drive motor is connected to the power gear box, and a lifting drive motor output worm is arranged on the lifting drive motor, the power gear box has a power gear box housing, a worm wheel, a transmission plate, an outer gear plate and a center shaft, the power gear box housing is fixedly mounted on the power gear box body fixing bracket by fasteners, the worm wheel, the transmission plate and the outer gear plate are all accommodated in the inner of the power gear box housing The worm wheel is connected with the output worm gear of the lifting drive motor to form a worm gear mechanism, and a worm wheel eccentric sleeve is convexly provided on the side of the worm wheel facing the positioning cavity. The worm wheel eccentric sleeve is eccentrically arranged relative to the central axis of the worm wheel body, and a drive connecting sleeve is also connected and sleeved on the worm wheel eccentric sleeve. The transmission plate is sleeved on the drive connecting sleeve, and the external gear plate is connected to the side surface of the transmission plate facing the positioning cavity, and an external gear plate outer gear ring is formed on the outer circumferential wall of the external gear plate, and the worm wheel eccentric sleeve and the drive connecting sleeve are inserted into the through hole of the external gear plate. , the central axis passes through the eccentric shaft sleeve of the worm gear and is connected to the center position of the worm gear body; the driving gear member has an inner toothed disc member and a gear shaft formed on the inner toothed disc member, the inner toothed disc member is arranged outside the positioning cavity and is sleeved on the outer gear plate, and the gear shaft is passed through the positioning cavity and is transmission-connected with the power gear box fixing bracket and the lifting positioning bracket, an inner gear ring of the inner toothed disc member is formed inside the inner toothed disc member, and the inner toothed disc member and the outer gear plate are transmission-connected through the meshing of the inner gear ring of the inner toothed disc member and the outer gear ring of the outer gear plate, and constitute a differential planetary gear transmission structure;The guide plate, the first rack plate I and the second rack plate II are connected together and are all inserted into the positioning cavity, and all three are in an arc-shaped plate structure. The first rack plate I and the second rack plate II are fitted together, and the first rack plate I is provided with a first rack plate arc-shaped rack I extending along its length direction, and the second rack plate II is also provided with a second rack plate arc-shaped rack II extending along its length direction. The first rack plate arc-shaped rack I and the second rack plate arc-shaped rack II are arranged correspondingly, and a gear shaft gear part meshing with the first rack plate arc-shaped rack I and the second rack plate arc-shaped rack II is formed on the gear shaft of the driving gear member. By rotating the driving gear member, the gear shaft The gear part can drive the first rack plate arc-shaped rack I and the second rack plate arc-shaped rack II to move, and the guide plate is also provided with a guide plate guide groove extending along its length direction, and the end of the gear shaft body away from the inner gear plate member is slidably fitted in the guide plate guide groove; the seat basin connection assembly is provided with a toothed plate connection bracket body and a seat basin connection bracket, the toothed plate connection bracket body is rotatably connected to the top end of the plate body formed by connecting the guide plate, the first rack plate I and the second rack plate II, the seat basin connection bracket is installed on the upper part of the toothed plate connection bracket body, and the front end of the seat basin frame is fixedly connected to the seat basin connection bracket, thereby realizing the connection between the seat basin frame and the two seat basin lifting assemblies. ;

[0022] In yet another specific embodiment of the present invention, a plurality of positioning rivet rods are further connected between the power gear box fixing bracket and the lifting positioning bracket of the positioning assembly, and the two ends of the positioning rivet rods are connected to the side vertical plates of the power gear box fixing bracket and the lifting positioning bracket, thereby realizing the positioning connection between the power gear box fixing bracket and the lifting positioning bracket; a plurality of rack plate connecting rivets are also penetrated through the guide plate, the first rack plate I and the second rack plate II, and the guide plate, the first rack plate I and the second rack plate II are fixedly connected by the plurality of rack plate connecting rivets; a gear shaft sleeve is mounted on the end portion of the gear shaft body in the length direction away from the inner gear disc member, and the gear shaft sleeve is fitted and installed in the lifting positioning bracket and rotatably fitted in the guide plate guide groove of the guide plate.

[0023] Due to the adoption of the above-mentioned structure, the utility model has the beneficial effects compared with the prior art: by arranging the angle adjuster assembly, the follow-up armrest assembly, the leg rest assembly and a pair of seat pan lifting assemblies, the linkage adjustment function of the backrest frame inclination and the follow-up armrest assembly is effectively realized, and the seat pan frame lifting and the leg rest assembly extension can be realized efficiently and conveniently, thereby effectively completing the adjustment of the zero-gravity posture of the seat; the overall structure is compact, further saving layout space, and the operation is smooth and reliable, and it can effectively ensure that the armrest follows the seat back for follow-up and adaptive adjustment, which reliably improves the riding comfort of passengers and has significant promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a schematic diagram of the overall structure of the utility model at another angle;

[0026] Figure 3 It is a structural schematic diagram of the slide rail assembly and the seat frame assembly in the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the angle adjuster assembly in the utility model;

[0028] Figure 5 It is a structural schematic diagram of the follow-up handrail assembly in the utility model;

[0029] Figure 6 This is a structural schematic diagram of the leg support assembly of the utility model;

[0030] Figure 7 It is a schematic diagram of the connection structure of a pair of seat basin lifting assemblies and a seat frame assembly in the utility model;

[0031] Figure 8 It is a three-dimensional structural exploded view of the seat basin lifting assembly of the utility model.

[0032] In the figure: 1. Electric long slide rail assembly, 11. Outer slide rail, 12. Inner slide rail;

[0033] 2. Seat frame assembly, 21. Frame body, 22. Front slide rail connection seat, 23. Rear slide rail connection seat, 24. Seat frame connection frame;

[0034] 3. Seat basin frame, 31. Seat basin side panels, 32. Front transverse pipe, 33. Rear transverse pipe, 34. Seat basin mounting frame;

[0035] 4. Backrest frame, 41. Backrest side bracket, 411. Backrest side bracket inner cavity, 42. Backrest lower bracket, 43. Backrest upper bracket, 44. Backrest support bracket;

[0036] 5. Recliner assembly, 51. Recliner drive motor, 52. Recliner body, 53. Recliner drive shaft, 54. Recliner mounting bracket, 55. Backrest connecting bracket;

[0037] 6. Follow-up handrail assembly, 61. Handrail frame, 611. Handrail frame connecting hole, 62. Linkage transmission unit, 621. Driving wheel, 622. Driven wheel, 623. Synchronous belt, 624. Protective cover, 63. Driving spline shaft, 631. External spline, 64. Transmission plate, 641. Internal spline hole, 65. Transmission locking unit, 651. Inner cover shell, 652. Outer cover shell, 653. Connecting locking assembly, 654. Handrail drive shaft, 6541. Handrail drive shaft transmission member;

[0038] 7. Leg support assembly, 71. Fixed support assembly, 711. Fixed support mounting plate, 7111. Fixed support mounting plate connecting seat, 712. Fixed support connecting beam, 72. Connecting rod assembly, 721. Driving beam, 722. Power arm, 723. Power arm connecting rod, 724. Adjusting connecting rod, 725. Leg support connecting rod, 726. Support connecting rod, 73. Leg support mounting assembly, 731. Leg support horizontal plate, 732. Leg support supporting plate, 74. Leg support bearing body, 75. Leg support driving device, 751. Leg support driving motor, 752. Transmission box, 753. Transmission box mounting frame, 754. Threaded screw, 755. Driving support;

[0039] 8. Seat basin lifting assembly, 81. Positioning assembly, 811. Power gear box fixing bracket, 812. Lifting positioning bracket, 813. Positioning cavity, 814. Positioning rivet rod, 82. Lifting drive motor, 821. Lifting drive motor output worm, 83. Power gear box, 831. Power gear box housing, 832. Worm gear, 8321. Worm gear eccentric sleeve, 8322. Drive connecting sleeve, 833. Transmission plate, 834. External gear plate, 8341. External gear plate outer ring, 835. Center shaft , 84. driving gear member, 841. inner gear plate member, 8411. inner gear ring of inner gear plate member, 842. gear shaft, 8421. gear part of gear shaft, 8422. gear shaft sleeve, 85. guide plate, 851. guide groove of guide plate, 86. first rack plate I, 861. arc-shaped rack I of first rack plate, 87. second rack plate II, 871. arc-shaped rack II of second rack plate, 88. seat basin connecting assembly, 881. rack plate connecting bracket body, 882. seat basin connecting bracket; 89. rack plate connecting rivet. DETAILED DESCRIPTION

[0040] In order to more clearly understand the technical essence and beneficial effects of the present invention, a detailed description will be given below in the form of embodiments. However, the description of the embodiments is not a limitation on the scheme of the present invention. Any equivalent changes made based on the concept of the present invention that are merely formal and not substantial should be regarded as within the scope of the technical scheme of the present invention.

[0041] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the corresponding Figure 1 The positions shown are for reference only and thus cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0042] See also Figures 1 to 8 , shows a vehicle zero-gravity seat, including a pair of electric long slide rail assemblies 1 in a long strip shape; a seat frame assembly 2, which is fixedly connected to the two electric long slide rail assemblies 1 and can slide back and forth along the inner slide rail 12 in the electric long slide rail assembly 1; a seat basin frame 3, the aforementioned seat basin frame 3 can be movably installed on the aforementioned seat frame assembly 2, and the rear lower end of the seat basin frame 3 is rotatably connected to the rear upper end of the seat frame assembly 2 through a rotating shaft; a backrest frame 4, the front The backrest frame 4 is rotatably connected to the aforementioned seat basin frame 3, and the lower end of the backrest frame 4 is rotatably connected to the rear side of the aforementioned seat basin frame 3; an adjuster assembly 5, the aforementioned adjuster assembly 5 is installed at the connection position of the aforementioned backrest frame 4 and the seat basin frame 3, and the adjuster assembly 5 is used to drive the aforementioned backrest frame 4 to rotate to achieve the adjustment of the seat back angle, and the aforementioned adjuster assembly 5 is preferably connected and fixed to the backrest frame 4 and the seat basin frame 3 by welding, of course, it can also be connected by welding. Any method of fixing by buckling or fastener connection is within the scope of protection of this patent, and no excessive restrictions are imposed here, and it can be flexibly changed according to actual needs; a follower armrest assembly 6, the follower armrest assembly 6 is installed at a side position in the middle of the height direction of the backrest frame 4 and is linked with the adjuster assembly 5, and the follower armrest assembly 6 is suitable for synchronous movement with the backrest frame 4; a leg support assembly 7, the leg support assembly 7 is installed at the front end of the seat basin frame 3, and the leg support assembly 7 is suitable for realizing synchronous movement with the aforementioned seat basin frame 3 and can realize the extension and contraction of its own components. When the leg support assembly 7 is extended, the leg support assembly 7 can lift the calf of the occupant; a pair of seat basin lifting assemblies 8, the two seat basin lifting assemblies 8 are respectively connected to the left and right sides of the front part of the aforementioned seat basin frame 3 and fixed to the aforementioned seat frame assembly 2, and the pair of seat basin lifting assemblies 8 are used to adjust the inclination angle of the aforementioned seat basin frame 3, so that the front end of the seat basin frame 3 is lifted and the seat is fully unfolded into a lying position and realizes a zero gravity state.

[0043] Please see the Figure 2 and Figure 3 , a pair of the aforementioned electric long slide rail assemblies 1 each include an outer slide rail 11 connected to the bottom plate of the vehicle body, the inner slide rail 12 in the aforementioned electric long slide rail assembly 1 is slidably connected to the outer slide rail 11, the aforementioned inner slide rail 12 is fixedly connected to the aforementioned seat frame assembly 2 and can drive the seat frame assembly 2 to slide back and forth, each inner slide rail 12 is slidably arranged on an outer slide rail 1, and a driving structure for driving the inner slide rail 12 to slide on the outer slide rail 11 is arranged between the outer slide rail 11 and the inner slide rail 12; and the aforementioned seat frame assembly 2 includes a frame body 21, a pair of front slide rail connecting seats 22, a pair of rear slide rail connecting seats 23 and a pair of seat frame connecting frames 24; the aforementioned frame body 21 is arranged at the upper position of the pair of electric long slide rail assemblies 1, and the frame body 21 is composed of four tubular frame bodies They are combined with each other to form a rectangular frame structure, the two aforementioned front slide rail connecting seats 22 are respectively fixedly connected to the left and right sides of the lower front part of the aforementioned frame body 21, and the two aforementioned rear slide rail connecting seats 23 are respectively fixedly connected to the left and right sides of the lower rear part of the aforementioned frame body 21, and the lower parts of the two front slide rail connecting seats 22 are respectively connected to the near front end parts of their respective corresponding inner slide rails 12, and the lower parts of the two rear slide rail connecting seats 23 are respectively connected to the near rear end parts of their respective corresponding inner slide rails 12, thereby realizing the connection between the seat frame assembly 2 and a pair of inner slide rails 12; the two seat frame connecting frames 24 are installed on the left and right sides of the upper rear part of the aforementioned frame body 21, and the two seat frame connecting frames 24 are pivotally connected to the aforementioned seat basin frame 3.

[0044] In this example, see Figure 1 Combined with Figure 2 The aforementioned seat basin frame 3 is equipped with a pair of seat basin side panels 31, a front transverse tube 32, a rear transverse tube 33 and a seat basin mounting frame plate 34; wherein, the two aforementioned seat basin side panels 31 are arranged at the upper position of the seat frame assembly 2, and the two seat basin side panels 31 are symmetrically arranged at intervals, the two seat basin side panels 31 are pivotally connected to their respective corresponding seat frame connecting frames 24 through a rotating shaft, the aforementioned front transverse tube 32 is connected between the front end portions of the two seat basin side panels 31, and the aforementioned rear transverse tube 33 is connected between the rear end portions of the two seat basin side panels 31, and the aforementioned seat basin mounting frame plate 34 is integrally installed on the upper portion of the front end portions of the two seat basin side panels 31.

[0045] Please continue to see Figure 1 Combined with Figure 4The backrest frame 4 includes a pair of backrest side brackets 41, a lower backrest bracket 42, an upper backrest bracket 43 and a backrest supporting bracket 44; the pair of the aforementioned backrest side brackets 41 are symmetrically arranged, and the interior of the aforementioned backrest side brackets 41 is hollow and forms a backrest side bracket inner cavity 411, and the bottoms of the two backrest side brackets 41 are rotatably connected to the aforementioned seat basin frame 3 through the aforementioned adjuster assembly 5; the aforementioned lower backrest bracket 42 is connected between the bottoms of the two aforementioned backrest side brackets 41, and the aforementioned upper backrest bracket 43 is connected between the tops of the two aforementioned backrest side brackets 41, the upper backrest bracket 43 is used to connect the seat headrest, and the aforementioned backrest supporting bracket 44 is connected between the middle and upper parts of the two backrest side brackets 41 in the height direction.

[0046] See also Figure 2 Please combine Figure 5 The aforementioned recliner assembly 5 includes a recliner drive motor 51, a pair of recliner bodies 52, a recliner drive shaft 53, a pair of recliner mounting brackets 54 and a pair of backrest connecting brackets 55; Figure 5As shown in, the aforementioned recliner drive motor 51 is installed on the inner side position of the backrest side bracket 41 on the left part of the aforementioned backrest frame 4, and the two recliner bodies 52 are respectively installed at the bottom position of the inner side of the two backrest side brackets 41, the aforementioned recliner drive shaft 53 is horizontally penetrated between the bottom parts of the two backrest side brackets 41, and the recliner drive shaft 53 passes through the two recliner bodies 52 to achieve transmission connection therewith, and the recliner drive shaft 53 is accommodated as a whole in the aforementioned backrest lower bracket 42, the aforementioned recliner drive motor 51 is used to drive the aforementioned recliner drive shaft 53 to rotate, and the output end of the recliner drive motor 51 is transmission connected to the recliner drive shaft 53; the upper parts of the two aforementioned recliner mounting brackets 54 are connected to their respective corresponding recliner bodies 52, and the lower parts of the two recliner mounting brackets 54 are respectively fixedly mounted on the seat basin side panels 31 on both sides of the aforementioned seat basin frame 3. On, thereby realizing the connection between the two recliner bodies 52 and the corresponding seat basin side panels 31; and the bottom parts of the two aforementioned backrest connecting brackets 55 are connected to the corresponding recliner bodies 52, and the upper parts of the aforementioned backrest connecting brackets 55 are fixedly mounted on the backrest side brackets 41 on both sides of the backrest frame 4, and the aforementioned backrest connecting brackets 55 can realize their own rotation under the drive of the aforementioned recliner body 52 and drive the backrest side brackets 41 to rotate, thereby realizing the angle adjustment of the aforementioned backrest frame 4; it should be noted that the aforementioned recliner body 52 has a recliner housing and a recliner turntable rotatable relative to the recliner housing, the recliner housing is connected to the recliner mounting bracket 54, and the recliner turntable is connected to the backrest side bracket 41, when the backrest frame 4 is adjusted in angle, an angular momentum offset is generated between the recliner turntable and the recliner housing, so that the backrest frame 4 rotates relative to the seat basin frame 3.

[0047] For further information, see Figure 5 Combined with Figure 4The aforementioned follow-up armrest assembly 6 includes an armrest frame 61, a linkage transmission unit 62, a drive spline shaft 63, a transmission disc 64 and a transmission locking unit 65; the aforementioned armrest frame 61 is arranged at a side position of the aforementioned backrest frame 4, the aforementioned linkage transmission unit 62 is transmission-connected to the adjuster drive shaft 53 of the aforementioned adjuster assembly 5, and the aforementioned drive spline shaft 63 is connected to the upper output end of the linkage transmission unit 62 and passes through the backrest side bracket 41 of the aforementioned backrest frame 4, the aforementioned transmission disc 64 is arranged on the outer side of the aforementioned backrest side bracket 41, and the drive spline shaft 63 penetrates into the aforementioned transmission disc 64 and is locked with it. The transmission locking unit 65 is arranged between the transmission disc 64 and the armrest frame 61 and realizes transmission connection with the two. The transmission locking unit 65 can drive the armrest frame 61 to rotate under the drive of the transmission disc 64 and can realize the locking of the armrest frame 61; wherein the linkage transmission unit 62 includes a driving wheel 621, a driven wheel 622, a synchronous belt 623 and a protective cover body 624, wherein the driving wheel 621, the driven wheel 622 and the synchronous belt 623 are all accommodated in the inner cavity of the protective cover body 624, and the protective cover body 624 can provide effective protection for the above-mentioned components. The driving wheel 621 is mounted on the shaft body of the aforementioned angle adjuster drive shaft 53 and can realize its own rotation under the drive of the angle adjuster drive shaft 53, while the aforementioned driven wheel 622 is mounted on the shaft body of the driving spline shaft 63, and the aforementioned driving wheel 621 is arranged at a position corresponding to the lower position of the driven wheel 622, and the aforementioned synchronous belt 623 is mounted between the aforementioned driving wheel 621 and the driven wheel 622, so that the driving wheel 621 and the driven wheel 622 can realize synchronous rotation and achieve a transmission connection between the angle adjuster drive shaft 53 and the driving spline shaft 63. The aforementioned driving wheel 621 and the driven wheel 622 are both pulleys and are arranged on them. There are transmission teeth, the synchronous belt 623 is a belt and a transmission gear is arranged on the synchronous belt 523 to mesh with each other. Of course, the forms of the aforementioned driving wheel 621 and the driven wheel 622 are not limited to this. Both can also be gears and the synchronous belt 53 can be a chain, etc., which will not be repeated here; an external spline 631 is arranged on the shaft body of the aforementioned driving spline shaft 63, and an internal spline hole 641 is arranged in the aforementioned transmission disk 64. The shape of the internal spline hole 641 is adapted to the shape of the aforementioned external spline 631. The aforementioned external spline 631 can be fitted into the internal spline hole 641, thereby realizing the matching connection between the driving spline shaft 63 and the transmission disk 64;The transmission locking unit 65 includes an inner cover shell 651, an outer cover shell 652, a connection locking assembly 653 and an armrest drive shaft 654. The inner cover shell 651 is arranged close to the transmission disk 64, and the inner cover shell 651 is connected to the transmission disk 64 and the transmission disk 64 can drive the inner cover shell 651 to rotate. The outer cover shell 652 is arranged at a position close to the armrest frame 61, and the connection locking assembly 653 is arranged between the inner cover shell 651 and the outer cover shell 652, and the armrest drive shaft 654 passes through the connection locking assembly 653 and the outer cover shell 652, and the armrest drive shaft 654 realizes transmission connection with the connection locking assembly 653. The armrest drive shaft 654 is also inserted into the armrest frame 61 and can drive the armrest frame 61 to rotate; the armrest frame 61 is a strip plate structure, and an armrest frame connection hole 611 is also provided at one end of the armrest frame 61 in the length direction close to the transmission locking unit 65, and an armrest drive shaft transmission member 6541 is also installed at one end of the armrest drive shaft 654 in the length direction of the transmission locking unit 65. The armrest drive shaft transmission member 6541 is inserted into the armrest frame connection hole 611 and installed together with the armrest frame 61, thereby realizing the transmission connection between the armrest drive shaft 654 and the armrest frame 61. ;

[0048] During the process of the backrest frame 4 rotating forward and backward, the recliner drive shaft 53 in the recliner assembly 5 can drive the linkage transmission unit 62 to move together, and the linkage transmission unit 62 drives the driving spline shaft 63 and the transmission plate 61 to move and rotate, and the transmission locking unit 65 and the armrest frame 61 to further move, thereby realizing the linkage between the follow-up armrest assembly 6 and the backrest frame 4, thereby realizing the linkage between the seat back angle and the armrest posture change, ensuring that the armrest body follows the seat back for follow-up and adaptive adjustment, which is more ergonomic, has good movement consistency, and a compact and simple structure, and can improve riding safety, while providing a comfortable and reliable use experience.

[0049] It should be noted that the aforementioned transmission locking unit 65 can stably provide damping force to the aforementioned driving spline shaft 63 and realize reliable hovering operation of the armrest frame 61. The user can also rotate the armrest to achieve the optimal use position by turning the armrest body. Regarding the internal structure and working principle of the transmission locking unit 65, please refer to the patent document with announcement number CN218750445U (an armrest locking and hovering mechanism for a car seat) applied by the applicant, which will not be repeated here.

[0050] See also Figure 6In the present embodiment, the leg support assembly 7 comprises a fixed bracket assembly 71, a connecting rod assembly 72 capable of being unfolded and stored, a leg support mounting assembly 73, a leg support carrier 74 and a leg support driving device 75; wherein the fixed bracket assembly 71 is fixedly connected to the front end portion of the seat basin frame 3, the connecting rod assembly 72 is hinged at the front position of the fixed bracket assembly 71, the leg support mounting assembly 73 is mounted at the front position of the connecting rod assembly 72 away from the fixed bracket assembly 71, the leg support carrier 74 is fixedly mounted on the leg support mounting assembly 73, and the leg support driving device 75 is fixedly mounted on the side of the connecting rod assembly 72 close to the fixed bracket assembly 71, and the leg support driving device 75 is used to drive the connecting rod assembly 72 to realize the unfolding and folding operation; the aforementioned fixed bracket assembly 71 includes a pair of fixed bracket mounting plates 711 arranged symmetrically at intervals and a fixed bracket connecting beam 712 connected between the two fixed bracket mounting plates 711, and a fixed bracket mounting plate connecting seat 7111 is connected to each of the two aforementioned fixed bracket mounting plates 711, and the two aforementioned fixed bracket mounting plate connecting seats 7111 are respectively fixed to the front parts of the two seat basin side plates 31 of the aforementioned seat basin frame 3; the aforementioned connecting rod assembly 72 includes a transversely arranged driving beam 721, a pair of power arms 722, a pair of power arm connecting rods 723, a pair of adjusting connecting rods 724, and a pair of leg support connecting rods 725 With a pair of supporting links 726, the two aforementioned power arms 722 are symmetrically arranged at intervals and one end of the two power arms 722 in the length direction is respectively hinged to the corresponding fixed bracket mounting plate 711, the aforementioned driving beam 721 is arranged between the two power arms 722 and positioned close to the hinged position of the power arm 722 and the fixed bracket mounting plate 711, the two aforementioned power arm connecting rods 723 are respectively cross-stacked with the corresponding power arms 722 and the power arm connecting rods 723 and the power arm 722 are hinged together at the middle part of the length direction, and the two aforementioned adjusting connecting rods 724 are respectively hinged to one end of the length direction of the corresponding power arm connecting rod 723 Together, the other ends of the two adjusting links 724 in the length direction are respectively hinged to the corresponding aforementioned fixed bracket mounting plates 711, and one ends of the two aforementioned leg support links 725 in the length direction are respectively hinged to the ends of the corresponding aforementioned power arms 722 in the length direction away from the fixed bracket mounting plates 711, and one ends of the two aforementioned supporting links 726 in the length direction are respectively hinged to the ends of the corresponding power arm links 723 in the length direction away from the adjusting links 724, and the middle positions of the two supporting links 726 are respectively hinged to the ends of the corresponding leg support links 725 in the length direction away from the power arm 722;The aforementioned leg support mounting assembly 73 is integrally fixedly mounted on the two aforementioned supporting connecting rods 726, and the leg support mounting assembly 73 comprises a pair of transversely arranged leg support cross plates 731 and a leg support support plate 732, the two leg support cross plates 731 are respectively fixedly mounted on the two supporting connecting rods 726 of the connecting rod assembly 72 in an upper and lower interval state, the aforementioned leg support support plate 732 is connected to the middle position between the two leg support cross plates 731 in a state perpendicular to the two leg support cross plates 731, and the aforementioned leg support bearing body 74 is integrally fixedly sleeved on the frame body formed by the two leg support cross plates 731 and the leg support support plate 732. The aforementioned leg support support plate 732 is connected and fixed together with the two leg support cross plates 731 by welding. In the actual production process and use process, the leg support bearing body 74 will be coated with a soft foaming material, so that it can be formed into a soft leg support, and the passenger can place the calf part on the soft leg support when riding, which is used to relieve the muscle soreness and swelling feeling of long-term riding. ;

[0051] Furthermore, the leg support driving device 75 includes a leg support driving motor 751, a transmission box 752, a transmission box mounting frame 753, a threaded screw 754 and a driving bracket 755; the transmission box mounting frame 753 is fixedly connected to the fixed bracket connecting crossbeam 712 of the fixed bracket assembly 71, and the transmission box 752 is fixedly connected to a side position of the transmission box mounting frame 753, the leg support driving motor 751 is arranged on the side of the transmission box 752 opposite to the transmission box mounting frame 753, and the threaded screw 754 is fixedly connected to the fixed bracket connecting crossbeam 712 of the fixed bracket assembly 71. The screw rod 754 is passed through the aforementioned transmission box 752 and is connected to the aforementioned leg support driving motor 751 for transmission. The aforementioned leg support driving motor 751 pushes the threaded screw rod 754 to realize its short-distance telescopic movement through cooperation with the transmission box 752. The aforementioned driving bracket 755 is rotatably connected to one end of the aforementioned threaded screw rod 754 close to the aforementioned connecting rod assembly 72 in the length direction. The end of the aforementioned driving bracket 755 away from the aforementioned threaded screw rod 754 is in a C-shaped structure and is semi-enclosed and welded to the driving beam 721 of the aforementioned connecting rod assembly 72. In this embodiment, the threaded screw 754 can move forward and backward under the drive of the leg support driving motor 751 and the transmission box 752. When the threaded screw 754 moves forward, the threaded screw 754 can drive the driving bracket 755 to move forward to push the aforementioned driving beam 721 to move. At this time, the aforementioned power arm 722 rotates under the action of the driving beam 721, and the aforementioned support link 726 and the leg support mounting assembly 73 begin to unfold under the joint action of the power arm link 723, the adjustment link 724 and the leg support link 725, thereby causing the connecting rod assembly 72 to unfold in the direction away from the seat basin frame 3; and when the aforementioned threaded screw 754 moves backward, the threaded screw 754 drives the driving bracket 755 to move backward, and finally causes the connecting rod assembly 72 to retract in the direction close to the vehicle seat body, thereby realizing the overall retraction of the leg support assembly 7.

[0052] See also Figure 7 and Figure 8 The two aforementioned seat basin lifting assemblies 8 are symmetrically arranged at intervals and are respectively arranged at the inner sides of the two seat basin side panels 31 of the aforementioned seat basin frame 3, and the two aforementioned seat basin lifting assemblies 8 each include a positioning assembly 81, a lifting drive motor 82, a power gear box 83, a driving gear member 84, a guide plate 85, a first rack plate I86, a second rack plate II87 and a seat basin connecting assembly 88; wherein the aforementioned positioning assembly 81 includes a power gear box body fixing bracket 811 and a lifting positioning bracket 812 which are relatively spaced and connected to each other, and a positioning cavity 813 is formed between the aforementioned power gear box body fixing bracket 811 and the lifting positioning bracket 812, the bottom transverse plate of the aforementioned power gear box body fixing bracket 811 is fixedly mounted on the seat frame assembly 2, and the bottom transverse plate of the aforementioned lifting positioning bracket 812 is also fixedly mounted on the seat frame assembly 2.

[0053] Furthermore, the power gear box 83 is fixedly mounted on the power gear box body fixing bracket 811 and positioned outside the positioning cavity 813. The lifting drive motor 82 is connected to the power gear box 83, and a lifting drive motor output worm 821 is provided on the lifting drive motor 82. The power gear box 83 has a power gear box housing 831, a worm gear 832, a transmission plate 833, an outer gear plate 834 and a central shaft 835. The power gear box housing 831 is fixedly mounted on the power gear box body fixing bracket 811 by fasteners. The worm gear 832, the transmission plate 833 and the outer gear plate 834 are all accommodated in the inner cavity of the power gear box housing 831, and the worm gear 832 is connected to the output worm 821 of the lifting drive motor and forms a worm gear mechanism. A worm gear eccentric sleeve 8321 is convexly provided on the side of the worm gear 832 facing the positioning cavity 813. The worm gear eccentric sleeve 8321 is eccentrically arranged relative to the central axis of the worm gear 832 body. A drive connecting sleeve 8322 is also connected and sleeved on the worm gear eccentric sleeve 8321, and the transmission plate 833 is sleeved on the outer gear plate 834. The outer gear plate 834 is connected to the side surface of the transmission plate 833 facing the positioning cavity 813, and an outer gear plate outer gear ring 8341 is formed on the outer circumferential wall of the outer gear plate 834, and the worm gear eccentric shaft sleeve 8321 and the driving connecting sleeve 8322 are inserted into the through hole of the outer gear plate 834, and the central shaft 835 passes through the worm gear eccentric shaft sleeve 8321 and is connected to the center position of the worm gear 832 body; the driving gear member 84 has an inner gear plate member 841 and a gear plate 841 formed on the inner gear plate member 841. The gear shaft 842 on the inner gear plate 841 is arranged outside the positioning cavity 813 and is sleeved on the outer gear plate 834, and the gear shaft 842 is penetrated in the positioning cavity 813 and is connected to the power gear housing fixing bracket 811 and the lifting positioning bracket 812. An inner gear ring 8411 of an inner gear plate is formed inside the inner gear plate 841. The inner gear plate 841 and the outer gear plate 834 are connected to each other through the meshing of the inner gear ring 8411 of the inner gear plate and the outer gear ring 8341 of the outer gear plate, and form a differential planetary gear transmission structure.The guide plate 85, the first rack plate I86 and the second rack plate II87 are connected together and are all inserted into the positioning cavity 813, and all three are in an arc-shaped plate structure. The first rack plate I86 and the second rack plate II87 are fitted together, and the first rack plate I86 is provided with a first rack plate arc-shaped rack I861 extending along its length direction, and the second rack plate II87 is also provided with a second rack plate arc-shaped rack II871 extending along its length direction. The first rack plate arc-shaped rack I861 and the second rack plate arc-shaped rack II871 are arranged correspondingly, and a gear shaft gear portion 8421 meshing with the first rack plate arc-shaped rack I861 and the second rack plate arc-shaped rack II871 is formed on the gear shaft 842 of the driving gear member 84. By rotating the driving gear member 84, the gear shaft gear portion 8421 is 421 can drive the first rack plate arc-shaped rack I861 and the second rack plate arc-shaped rack II871 to move, and the aforementioned guide plate 85 is also provided with a guide plate guide groove 851 extending along its length direction, and the end of the aforementioned gear shaft 842 shaft body away from the inner gear plate member 841 is slidably fitted in the guide plate guide groove 851; the aforementioned seat basin connection assembly 88 has a toothed plate connection bracket body 881 and a seat basin connection bracket 882, the aforementioned toothed plate connection bracket body 881 is rotatably connected to the top end of the plate body formed by connecting the guide plate 85, the first rack plate I86 and the second rack plate II87, the aforementioned seat basin connection bracket 882 is installed on the upper part of the aforementioned toothed plate connection bracket body 881, and the front end of the aforementioned seat basin frame 3 is fixedly connected to the aforementioned seat basin connection bracket 882, thereby realizing the connection between the seat basin frame 3 and the two aforementioned seat basin lifting assemblies 8. ;

[0054] It should be noted that: when it is necessary to lift the seat basin frame 4 to achieve a zero-gravity posture of the seat, that is, when it is necessary to adjust the inclination angle of the front end of the seat basin frame 4, the lifting drive motor 82 is controlled by the control system, and the drive gear member 84 is driven to move through the transmission of the worm gear and the power gear box 83. The first rack plate I86 and the second rack plate II87 start to move with the rotation of the gear shaft 842 on the drive gear member 84. The first rack plate I86 and the second rack plate II87 can move along the trajectory of the guide plate guide groove 851 of the guide plate 85, thereby finally driving the seat basin connecting assembly 88 to move, thereby achieving a reliable lifting operation of the front end of the seat basin.

[0055] In this embodiment, a plurality of positioning rivet rods 814 are further connected between the power gear box fixing bracket 811 and the lifting positioning bracket 812 of the aforementioned positioning assembly 81, and the two ends of the aforementioned positioning rivet rods 814 are connected to the side vertical plates of the aforementioned power gear box fixing bracket 811 and the lifting positioning bracket 812, thereby realizing the positioning connection between the aforementioned power gear box fixing bracket 811 and the lifting positioning bracket 812; the aforementioned guide plate 85, the first rack plate I86 and the second rack plate II87 A plurality of rack plate connecting rivets 89 are also provided among the three, and the aforementioned guide plate 85, the first rack plate I86 and the second rack plate II87 are fixedly connected by means of a plurality of rack plate connecting rivets 89; a gear shaft sleeve 8422 is mounted on the end portion of the aforementioned gear shaft 842 in the length direction of the shaft body away from the aforementioned inner gear plate member 841, and the gear shaft sleeve 8422 is cooperatedly installed in the aforementioned lifting and positioning bracket 812 and rotatably engaged in the guide plate guide groove 851 of the aforementioned guide plate 85.

[0056] See also Figure 1 Combined with Figure 2 and Figure 3 The applicant briefly describes the working principle of the technical solution provided by the utility model: when it is necessary to achieve a zero-gravity posture of the seat, the control system module controls the angle adjuster drive motor 51, the leg support drive motor 751 and a pair of lifting drive motors 82 to start working, so that the backrest frame 4 starts to rotate backward and starts to rotate relative to the seat basin frame 3, and at the same time, the follower armrest assembly 6 moves together with the rotation of the backrest frame 4 to achieve the best state of human hand placement. In this process, the connecting rod assembly 72 in the leg support assembly 7 realizes the overall extension of the leg support assembly 7, and the seat basin lifting assembly Assembly 8 pushes the front end of the seat basin frame 3 upward, thereby effectively adjusting the inclination angle of the aforementioned seat basin frame 3 relative to the seat frame assembly 2, so that the back of the human body is tilted backward, and the human thigh is supported by the seat basin frame 3 to be in an oblique upward state, and the human calf is supported by the leg support assembly 7 to achieve a forward stretching posture, thereby extending the seat as a whole and flexibly adjusting the support state of the human body, improving comfort, and achieving a "zero gravity" state, and having the advantages of simple structure and high strength, can effectively improve the comfort of drivers and passengers, and improve service life and operational reliability.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A vehicle zero gravity seat, characterized in that: include: A pair of electric long slide rail assemblies (1); A seat frame assembly (2), the seat frame assembly (2) being fixedly connected to the two electric long slide rail assemblies (1) and the seat frame assembly (2) being capable of reciprocatingly sliding along the inner slide rail (12) in the electric long slide rail assembly (1); A seat basin frame (3), wherein the seat basin frame (3) is movably mounted on the seat frame assembly (2); a backrest frame (4), the backrest frame (4) being rotatably connected to the seat basin frame (3); a recliner assembly (5), the recliner assembly (5) being installed at the connection position between the backrest frame (4) and the seat basin frame (3), and the recliner assembly (5) being used to drive the backrest frame (4) to rotate; A follower armrest assembly (6), the follower armrest assembly (6) is installed at a side position in the middle of the backrest frame (4) in the height direction and is linked with the angle adjuster assembly (5), and the follower armrest assembly (6) is suitable for synchronous movement with the backrest frame (4); a leg support assembly (7), the leg support assembly (7) being mounted on the front end of the seat basin frame (3), and the leg support assembly (7) being adapted to achieve synchronous movement with the seat basin frame (3) and capable of achieving extension and contraction of its own components; A pair of seat basin lifting assemblies (8), the two seat basin lifting assemblies (8) are respectively connected to the left and right sides of the front of the seat basin frame (3) and fixed to the seat frame assembly (2), and the pair of seat basin lifting assemblies (8) are used to adjust the inclination angle of the seat basin frame (3).

2. The vehicle zero-gravity seat according to claim 1, characterized in that: The pair of electric long slide rail assemblies (1) each comprises an outer slide rail (11) connected to the bottom plate of the vehicle body, the inner slide rail (12) in the electric long slide rail assembly (1) is slidably connected to the outer slide rail (11), the inner slide rail (12) is fixedly connected to the seat frame assembly (2) and can drive the seat frame assembly (2) to slide back and forth; and the seat frame assembly (2) comprises a frame body (21), a pair of front slide rail connecting seats (22), a pair of rear slide rail connecting seats (23) and a pair of seat frame connecting frames (24); the frame body (21) is arranged at an upper position of the pair of electric long slide rail assemblies (1), and the two front slide rail connecting seats (22) are respectively fixedly connected to the frame body (21) and the rear slide rail connecting seats (23) are respectively fixedly connected to the frame body (21). ) on the left and right sides of the lower front part, the two rear slide rail connecting seats (23) are respectively fixed on the left and right sides of the lower rear part of the frame body (21), and the lower parts of the two front slide rail connecting seats (22) are respectively connected to the near front end parts of the corresponding inner slide rails (12), and the lower parts of the two rear slide rail connecting seats (23) are respectively connected to the near rear end parts of the corresponding inner slide rails (12), thereby realizing the connection between the seat frame assembly (2) and the pair of inner slide rails (12); the two seat frame connecting frames (24) are installed on the left and right sides of the upper rear part of the frame body (21), and the two seat frame connecting frames (24) are pivotally connected to the seat basin frame (3).

3. The vehicle zero-gravity seat according to claim 1, characterized in that: The seat basin frame (3) comprises a pair of seat basin side panels (31), a front transverse tube (32), a rear transverse tube (33) and a seat basin mounting frame plate (34); wherein the two seat basin side panels (31) are arranged at the upper position of the seat frame assembly (2), and the two seat basin side panels (31) are symmetrically arranged at intervals and are pivotally connected to the seat frame assembly (2), the front transverse tube (32) is connected between the front end portions of the two seat basin side panels (31), and the rear transverse tube (33) is connected between the rear end portions of the two seat basin side panels (31), and the seat basin mounting frame plate (34) is integrally mounted on the upper portion of the front end portions of the two seat basin side panels (31).

4. The zero-gravity seat for a vehicle according to claim 3, characterized in that: The backrest frame (4) includes a pair of backrest side brackets (41), a lower backrest bracket (42), an upper backrest bracket (43) and a backrest support bracket (44); the pair of backrest side brackets (41) are arranged opposite to each other, and the backrest side brackets (41) are hollow inside and form a backrest side bracket inner cavity (411), and the bottoms of the two backrest side brackets (41) are rotatably connected to the seat basin frame (3) through the angle adjuster assembly (5); the lower backrest bracket (42) is connected between the bottoms of the two backrest side brackets (41), the upper backrest bracket (43) is connected between the tops of the two backrest side brackets (41), and the backrest support bracket (44) is connected between the middle and upper parts of the two backrest side brackets (41) in the height direction.

5. The zero-gravity seat for a vehicle according to claim 4, characterized in that: The angle adjuster assembly (5) comprises an angle adjuster drive motor (51), a pair of angle adjuster bodies (52), an angle adjuster drive shaft (53), a pair of angle adjuster mounting brackets (54) and a pair of backrest connecting brackets (55); the angle adjuster drive motor (51) is mounted on the inner side of a backrest side bracket (41) of the backrest frame (4), and the two angle adjuster bodies (52) are respectively mounted at the bottom positions of the inner sides of the two backrest side brackets (41); the angle adjuster drive shaft (53) is horizontally penetrated between the bottom parts of the two backrest side brackets (41), and the angle adjuster drive shaft (53) passes through the two angle adjuster bodies (52) to achieve transmission connection therewith; the angle adjuster drive shaft (53) is entirely accommodated in the backrest lower bracket (42); the angle adjuster drive motor (51) is used to drive the angle adjuster drive shaft (53) to rotate, and the angle adjuster drive motor (51) The output end of the two angle adjuster mounting brackets (51) is connected to the angle adjuster driving shaft (53) for transmission connection; the upper parts of the two angle adjuster mounting brackets (54) are connected to the corresponding angle adjuster bodies (52), and the lower parts of the two angle adjuster mounting brackets (54) are respectively fixedly mounted on the seat basin side panels (31) on both sides of the seat basin frame (3), thereby realizing the connection between the two angle adjuster bodies (52) and the corresponding seat basin side panels (31); and the bottom parts of the two backrest connecting brackets (55) are connected to the corresponding angle adjuster bodies (52), and the upper parts of the backrest connecting brackets (55) are fixedly mounted on the backrest side brackets (41) on both sides of the backrest frame (4), and the backrest connecting brackets (55) can realize their own rotation under the drive of the angle adjuster body (52) and drive the backrest side brackets (41) to rotate, thereby realizing the angle adjustment of the backrest frame (4).

6. The zero-gravity seat for a vehicle according to claim 5, characterized in that: The follow-up armrest assembly (6) includes an armrest frame (61), a linkage transmission unit (62), a drive spline shaft (63), a transmission disc (64) and a transmission locking unit (65); the armrest frame (61) is arranged at a side position of the backrest frame (4), the linkage transmission unit (62) is transmission-connected to the recliner drive shaft (53) of the recliner assembly (5), and the drive spline shaft (63) is connected to the upper output end of the linkage transmission unit (62) and passes out of the backrest side bracket (41) of the backrest frame (4), and the transmission disc (64) is arranged on the backrest frame (4). The drive spline shaft (63) is inserted into the transmission disc (64) and is in transmission connection with the transmission disc (64), and the transmission locking unit (65) is arranged between the transmission disc (64) and the armrest frame (61) and is in transmission connection with the two. The transmission locking unit (65) can drive the armrest frame (61) to rotate under the drive of the transmission disc (64) and can lock the armrest frame (61); wherein the linkage transmission unit (62) includes a driving wheel (621), a driven wheel (622), a synchronous belt (623) and a protective cover body ( 624), the driving wheel (621), the driven wheel (622) and the synchronous belt (623) are all accommodated in the inner cavity of the protective cover body (624), the driving wheel (621) is sleeved on the shaft body of the angle adjuster drive shaft (53) and can realize its own rotation under the drive of the angle adjuster drive shaft (53), and the driven wheel (622) is sleeved on the shaft body of the driving spline shaft (63), and the driving wheel (621) is arranged at a position corresponding to the lower position of the driven wheel (622), and the synchronous belt (623) is sleeved and connected between the driving wheel (621) and the driven wheel (622). The driving wheel (621) and the driven wheel (622) are connected to each other so that the driving wheel (621) and the driven wheel (622) can rotate synchronously and achieve transmission connection between the angle adjuster driving shaft (53) and the driving spline shaft (63); an external spline (631) is arranged on the shaft body of the driving spline shaft (63), and an internal spline hole (641) is arranged in the transmission plate (64). The shape of the internal spline hole (641) is compatible with the shape of the external spline (631), and the external spline (631) can be installed in the internal spline hole (641) to achieve the matching connection between the driving spline shaft (63) and the transmission plate (64);The transmission locking unit (65) includes an inner cover shell (651), an outer cover shell (652), a connection locking assembly (653) and an armrest drive shaft (654); the inner cover shell (651) is arranged close to the transmission disk (64), and the inner cover shell (651) is connected to the transmission disk (64), and the transmission disk (64) can drive the inner cover shell (651) to rotate; the outer cover shell (652) is arranged at a position close to the armrest frame (61), and the connection locking assembly (653) is arranged between the inner cover shell (651) and the outer cover shell (652); the armrest drive shaft (654) passes through the connection locking assembly (653) and the outer cover shell (652), and the armrest drive shaft (654) and the connection locking assembly (653) are realized. The armrest drive shaft (654) is also inserted into the armrest frame (61) and can drive the armrest frame (61) to rotate; the armrest frame (61) is a strip plate structure, and an armrest frame connection hole (611) is also provided at one end of the armrest frame (61) in the length direction facing the transmission locking unit (65), and an armrest drive shaft transmission member (6541) is also installed at one end of the armrest drive shaft (654) in the length direction of the transmission locking unit (65), and the armrest drive shaft transmission member (6541) is inserted into the armrest frame connection hole (611) and is installed together with the armrest frame (61), thereby realizing the transmission connection between the armrest drive shaft (654) and the armrest frame (61). ; 7. The zero-gravity seat for a vehicle according to claim 1, characterized in that: The leg support assembly (7) includes a fixed support assembly (71), a connecting rod assembly (72) that can be unfolded and stored, a leg support mounting assembly (73), a leg support carrier (74) and a leg support driving device (75); wherein the fixed support assembly (71) is fixedly connected to the front end of the seat basin frame (3), the connecting rod assembly (72) is hinged at the front position of the fixed support assembly (71), the leg support mounting assembly (73) is installed at the front position of the connecting rod assembly (72) away from the fixed support assembly (71), the leg support carrier (74) is fixedly installed on the leg support mounting assembly (73), and the leg support driving device (75) is connected to the leg support mounting assembly (73). (75) is fixedly mounted on the side of the connecting rod assembly (72) facing the fixed bracket assembly (71), and the leg support driving device (75) is used to drive the connecting rod assembly (72) to realize the unfolding and folding operation; the fixed bracket assembly (71) includes a pair of fixed bracket mounting plates (711) symmetrically arranged at intervals and a fixed bracket connecting crossbeam (712) connected between the two fixed bracket mounting plates (711), and a fixed bracket mounting plate connecting seat (7111) is connected to each of the two fixed bracket mounting plates (711), and the fixed bracket mounting plate connecting seat (7111) is fixedly connected to the front part of the seat basin frame (3);The connecting rod assembly (72) includes a transversely arranged driving beam (721), a pair of power arms (722), a pair of power arm connecting rods (723), a pair of adjusting connecting rods (724), a pair of leg support connecting rods (725) and a pair of supporting connecting rods (726). The two power arms (722) are symmetrically arranged at intervals and one end of the two power arms (722) in the length direction is respectively hinged to the corresponding fixed bracket mounting plate (711). The driving beam (721) is arranged between the two power arms (722) and is positioned close to the power arms (722) and the fixed bracket mounting plate (711). At the position of the hinged part, the two power arm connecting rods (723) are respectively cross-stacked with the corresponding power arms (722), and the middle parts of the power arm connecting rods (723) and the power arms (722) are hinged together in the length direction. One end of the two adjustment connecting rods (724) in the length direction is respectively hinged with one end of the two corresponding power arm connecting rods (723) in the length direction, and the other end of the two adjustment connecting rods (724) in the length direction is respectively hinged with the corresponding fixed bracket mounting plate (711). The two leg support connecting rods (725) in the length direction are respectively hinged with the corresponding fixed bracket mounting plate (711). One end of each of the two supporting links (726) is hinged to one end of each of the corresponding power arms (722) in the length direction away from the fixed bracket mounting plate (711), one end of each of the two supporting links (726) in the length direction is hinged to one end of each of the corresponding power arm connecting rods (723) in the length direction away from the adjusting connecting rod (724), and the middle positions of the two supporting links (726) are hinged to one end of each of the corresponding leg support connecting rods (725) in the length direction away from the power arm (722); the leg support mounting assembly (73) is fixedly mounted on the two The leg support mounting assembly (73) comprises a pair of transversely arranged leg support cross plates (731) and a leg support support plate (732), the two leg support cross plates (731) are respectively fixedly mounted on the two support links (726) of the connecting rod assembly (72) in an upper and lower spacing state, the leg support support plate (732) is connected to the middle position between the two leg support cross plates (731) in a state perpendicular to the two leg support cross plates (731), and the leg support bearing body (74) is integrally fixedly sleeved on the frame body formed by the two leg support cross plates (731) and the leg support support plate (732). ; 8. The zero-gravity seat for a vehicle according to claim 7, characterized in that: The leg support driving device (75) comprises a leg support driving motor (751), a transmission box (752), a transmission box mounting frame (753), a threaded screw (754) and a driving bracket (755); the transmission box mounting frame (753) is fixedly connected to the fixed bracket connecting crossbeam (712) of the fixed bracket assembly (71), and the transmission box (752) is fixedly connected to a side position of the transmission box mounting frame (753); the leg support driving motor (751) is arranged at a side position of the transmission box mounting frame (753) of the transmission box (752) opposite to the transmission box mounting frame (753); the threaded screw (754) is fixedly connected to the fixed bracket connecting crossbeam (712) of the fixed bracket assembly (71), and the transmission box (752) is fixedly connected to a side position of the transmission box mounting frame (753); (754) is passed through the transmission box (752) and is connected to the leg support driving motor (751) for transmission. The leg support driving motor (751) cooperates with the transmission box (752) to push the threaded screw (754) to achieve its short-distance telescopic movement. The driving bracket (755) is rotatably connected to one end of the threaded screw (754) in the length direction toward the connecting rod assembly (72). The end of the driving bracket (755) away from the threaded screw (754) is in a C-shaped structure and is semi-enclosed and welded to the driving beam (721) of the connecting rod assembly (72).

9. The zero-gravity seat for a vehicle according to claim 1, characterized in that: A pair of the seat basin lifting assemblies (8) are symmetrically arranged at intervals, and the two seat basin lifting assemblies (8) each include a positioning assembly (81), a lifting drive motor (82), a power gear box (83), a driving gear member (84), a guide plate (85), a first rack plate I (86), a second rack plate II (87) and a seat basin connecting assembly (88); wherein the positioning assembly (81) includes a power gear box body fixing bracket (811) and a lifting positioning bracket (812) which are arranged opposite to each other at intervals and connected to each other, and a positioning cavity (813) is formed between the power gear box body fixing bracket (811) and the lifting positioning bracket (812), and the power gear box body fixing bracket (811) and the lifting positioning bracket (812) are provided with a positioning cavity (813), wherein ... The bottom transverse plate of the wheel box body fixing bracket (811) is fixedly mounted on the seat frame assembly (2), and the bottom transverse plate of the lifting positioning bracket (812) is also fixedly mounted on the seat frame assembly (2); the power gear box (83) is fixedly mounted on the power gear box body fixing bracket (811) and positioned outside the positioning cavity (813); the lifting drive motor (82) is connected to the power gear box (83), and a lifting drive motor output worm (821) is provided on the lifting drive motor (82); the power gear box (83) has a power gear box housing (831), a worm wheel (832), a transmission plate (833), an outer gear plate (834), and a plurality of gears (836) are provided on the lifting drive motor (82). 34) and a central axis (835), the power gear box housing (831) is fixedly mounted on the power gear box body fixing bracket (811) by fasteners, the worm wheel (832), the transmission plate (833) and the outer gear plate (834) are all accommodated in the inner cavity of the power gear box housing (831), and the worm wheel (832) is transmission-connected with the output worm (821) of the lifting drive motor to form a worm gear mechanism, and a worm wheel eccentric shaft sleeve (8321) is convexly provided on the side of the worm wheel (832) facing the positioning cavity (813), and the worm wheel eccentric shaft sleeve (8321) is eccentrically arranged relative to the central axis of the worm wheel (832) body, A drive connecting sleeve (8322) is also connected and sleeved on the worm gear eccentric shaft sleeve (8321), and the transmission plate (833) is sleeved on the drive connecting sleeve (8322), and the external gear plate (834) is connected to the side surface of the transmission plate (833) facing the positioning cavity (813), and an external gear plate outer gear ring (8341) is formed on the outer circumferential wall of the external gear plate (834), and the worm gear eccentric shaft sleeve (8321) and the drive connecting sleeve (8322) are inserted into the through hole of the external gear plate (834), and the central shaft (835) passes through the worm gear eccentric shaft sleeve (8321) and is connected to the center position of the worm gear (832) body;The driving gear member (84) has an inner toothed disc member (841) and a gear shaft (842) formed on the inner toothed disc member (841); the inner toothed disc member (841) is arranged outside the positioning cavity (813) and is sleeved on the outer gear plate (834); the gear shaft (842) is passed through the positioning cavity (813) and is transmission-connected with the power gear housing fixing bracket (811) and the lifting positioning bracket (812); an inner toothed disc member inner gear ring (8411) is formed inside the inner toothed disc member (841); the inner toothed disc member (841) and the outer gear plate (834) are connected via the inner toothed disc member inner gear ring (8411) and the outer gear plate outer gear ring (8412). The meshing of the ring (8341) realizes the transmission connection and constitutes a differential planetary gear transmission structure; the guide plate (85), the first rack plate I (86) and the second rack plate II (87) are connected together and are all inserted into the positioning cavity (813), and all three are arc-shaped plate structures. The first rack plate I (86) and the second rack plate II (87) are arranged together in a close fit, and the first rack plate I (86) is provided with a first rack plate arc-shaped rack I (861) extending along its length direction, and the second rack plate II (87) is also provided with a second rack plate arc-shaped rack II (871) extending along its length direction. The first rack plate arc-shaped rack The first rack plate arc-shaped rack I (861) and the second rack plate arc-shaped rack II (871) are arranged correspondingly, and a gear shaft gear portion (8421) meshing with the first rack plate arc-shaped rack I (861) and the second rack plate arc-shaped rack II (871) is formed on the gear shaft (842) of the driving gear member (84). By rotating the driving gear member (84), the gear shaft gear portion (8421) can drive the first rack plate arc-shaped rack I (861) and the second rack plate arc-shaped rack II (871) to move, and a guide plate guide groove (851) extending along the length direction of the guide plate (85) is also provided on the guide plate (85). The shaft body of the gear shaft (842) is away from the inner gear plate member ( 841) is slidably fitted in the guide groove (851) of the guide plate; the seat basin connection assembly (88) comprises a toothed plate connection bracket body (881) and a seat basin connection bracket (882), the toothed plate connection bracket body (881) is rotatably connected to the top end of the plate body formed by connecting the guide plate (85), the first rack plate I (86) and the second rack plate II (87), the seat basin connection bracket (882) is installed on the upper part of the toothed plate connection bracket body (881), and the front end of the seat basin frame (3) is fixedly connected to the seat basin connection bracket (882), thereby realizing the connection between the seat basin frame (3) and the two seat basin lifting assemblies (8). ; 10. The zero-gravity seat for a vehicle according to claim 9, characterized in that: A plurality of positioning rivet rods (814) are also connected between the power gear box fixing bracket (811) and the lifting positioning bracket (812) of the positioning assembly (81), and the two ends of the positioning rivet rods (814) are connected to the side vertical plates of the power gear box fixing bracket (811) and the lifting positioning bracket (812), thereby realizing the positioning connection between the power gear box fixing bracket (811) and the lifting positioning bracket (812); between the guide plate (85), the first rack plate I (86) and the second rack plate II (87), A plurality of rack plate connecting rivets (89) are also provided therein, and the guide plate (85), the first rack plate I (86) and the second rack plate II (87) are fixedly connected by means of the plurality of rack plate connecting rivets (89); a gear shaft sleeve (8422) is mounted on the end of the gear shaft (842) away from the inner gear plate (841) in the length direction of the shaft body, and the gear shaft sleeve (8422) is mounted in the lifting and positioning bracket (812) and rotatably engaged in the guide plate guide groove (851) of the guide plate (85).

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