Zero-gravity seat framework mechanism and vehicle

Abstract

The invention discloses a zero-gravity seat framework mechanism and a vehicle, and relates to the technical field of automobile seats, and the zero-gravity seat framework mechanism comprises a support fixed in the vehicle; the seat framework is arranged at the upper part of the bracket; the seat framework comprises a cushion framework and a backrest framework, the lower end of the backrest framework is hinged to the first end of the cushion framework, and the first end of the cushion framework is rotationally connected to the first end of the support; the lead screw driving device is fixedly connected to the support, a lead screw of the lead screw driving device does linear motion, and the lead screw is connected to the second end of the cushion framework in a driving mode and drives the second end of the cushion framework to ascend and descend. The lead screw of the lead screw driving device drives the front end of the cushion framework to ascend or descend through linear motion, compared with other driving devices such as a driving gear, the linear driving mode is smooth in transmission and small in influence of loads, shaking caused by sharp changes of the loads in the seat angle adjusting process can be reduced, and the adjusting effect of the seat angle is improved. And the riding comfort is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a zero-gravity seat frame mechanism and a vehicle. Background Art

[0002] With the rapid development of the automotive industry and the continuous improvement of consumers' demand for riding comfort, zero-gravity seats have gradually become a hot spot in the market. The design of zero-gravity seats is inspired by the sitting posture of astronauts during space flight, aiming to simulate the state of weightlessness, thereby reducing the load on the body and improving riding comfort.

[0003] The Chinese patent document with publication number CN220281196U discloses a zero-gravity vehicle seat and seat frame. The seat frame includes a base, a seat frame located above it, a front connecting rod pivotally connected to the seat frame at one end, and a tilt adjustment mechanism, which includes a tilt adjustment link and a tilt drive mechanism, the other end of the front connecting rod is hinged to one end of the tilt adjustment link, and the other end of the tilt adjustment link is pivotally connected to the base. The seat frame also includes a front synchronization rod, and its two ends are respectively fixedly connected to the pivot connection point between the base and the tilt adjustment link. The seat frame is also provided with a preloading device for preloading the tilt drive mechanism. The zero-gravity vehicle seat includes the above-mentioned seat frame. The tilt drive gear of the utility model is always under preloading during the entire adjustment stroke, although the shaking phenomenon during the adjustment process can be eliminated. However, during the seat tilt adjustment process, due to the changes in the center of gravity and load of the system, the drive gear may face the situation of no load or a sharp change in load, resulting in shaking during the adjustment process, affecting the riding comfort. Summary of the invention

[0004] The purpose of the present invention is to provide a zero-gravity seat frame mechanism and a vehicle, which solves the technical problem in the prior art that during the seat inclination adjustment process, due to changes in the system's center of gravity and load, the drive unit may face a situation of no load or a sharp change in load, resulting in jitter during the adjustment process and affecting ride comfort.

[0005] The present invention provides the following scheme:

[0006] In a first aspect, the present invention describes a zero-gravity chair frame structure, comprising:

[0007] A bracket, wherein the bracket is fixed inside the vehicle;

[0008] A seat frame, the seat frame is arranged on the upper part of the bracket; the seat frame includes a cushion frame and a backrest frame, the lower end of the backrest frame is hinged to the first end of the seat cushion frame, and the first end of the seat cushion frame is rotatably connected to the first end of the bracket;

[0009] A screw drive device is fixedly connected to the bracket, the screw of the screw drive device performs linear motion, and the screw drive is connected to the second end of the seat cushion frame to drive the second end of the seat cushion frame to rise and fall.

[0010] Preferably, the screw rod drives the second end of the seat cushion frame to rise and fall through a connecting rod assembly;

[0011] The connecting rod assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod;

[0012] The first end of the first connecting rod is fixed on the bracket; the middle part of the second connecting rod is rotatably connected to the second end of the first connecting rod, the first end of the second connecting rod is rotatably connected to the screw rod, the second end of the second connecting rod is rotatably connected to the first end of the third connecting rod, the second end of the third connecting rod is rotatably connected to the first end of the fourth connecting rod, and the second end of the fourth connecting rod is fixedly connected to the second end of the seat cushion frame.

[0013] Preferably, the connection point between the middle portion of the second connecting rod and the second end of the first connecting rod is the first connection point, the connection point between the first end of the second connecting rod and the screw rod is the second connection point, and the connection point between the second end of the second connecting rod and the third connecting rod is the third connection point;

[0014] A distance between the first connection point and the second connection point is smaller than a distance between the first connection point and the third connection point.

[0015] Preferably, the screw drive device is provided in two groups, which are respectively fixed on two sides of the bracket;

[0016] The connecting rod assembly is provided with two groups corresponding to the screw drive device, and the two third connecting rods are connected by a synchronization rod.

[0017] Preferably, the two sets of screw drive devices each include a screw, a motor, a rotating block and a fixed frame;

[0018] The fixing frame is fixed on the bracket;

[0019] One end of the motor is connected to the fixed frame through the rotating block and rotates horizontally relative to the fixed frame;

[0020] A nut is rotatably connected inside the rotating block, and the transmission shaft of the motor is connected to the nut, driving the nut to rotate inside the rotating block; the first end of the screw rod is rotatably connected to the first end of the second connecting rod, and the second end of the screw rod is threaded into the inside of the nut and performs linear motion inside the nut.

[0021] Preferably, the fixing frame comprises a bottom plate, a first connecting arm and a second connecting arm;

[0022] The bottom plate is fixed on the bracket via a fixing plate;

[0023] The first connecting arm and the second connecting arm are fixed on both sides of the bottom plate, and the rotating block is rotatably connected in a space formed by the first connecting arm and the second connecting arm.

[0024] Preferably, the rotating block comprises a rotating block body, a third connecting arm and a fourth connecting arm;

[0025] The third connecting arm is connected to the rotating block body through the first motor shaft, and the fourth connecting arm is connected to the rotating block body through the second motor shaft;

[0026] The rotating block rotates relative to the fixing frame via the first motor shaft and the second motor shaft.

[0027] Preferably, a first arc-shaped groove and a second arc-shaped groove are respectively formed at the upper ends of the first connecting arm and the second connecting arm;

[0028] The first motor shaft and the second motor shaft are rotatably connected to the first arc groove and the second arc groove respectively.

[0029] Preferably, a first frame connecting rod is provided at the bottom of the first end of the seat cushion frame;

[0030] A second skeleton connecting rod is disposed at the first end of the bracket;

[0031] The first skeleton link is hinged to the second skeleton link.

[0032] In a second aspect, the present invention describes a vehicle comprising at least one zero-gravity seat frame mechanism as described above.

[0033] Compared with the prior art, the present invention has the following advantages:

[0034] The zero-gravity seat frame mechanism provided by the present invention has a screw of a screw drive device that drives the front end of the seat frame to rise or fall by performing linear motion. Compared with other drive devices such as drive gears, the linear drive method has a smoother transmission and is less affected by the load. It can reduce the jitter caused by sudden changes in the load during the seat angle adjustment process, thereby improving riding comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 An axonometric view of a design state of a zero-gravity seat frame mechanism according to an embodiment of the present invention;

[0037] Figure 2 A side view of a zero-gravity chair frame mechanism in a design state according to an embodiment of the present invention;

[0038] Figure 3 An axonometric diagram of a zero-gravity seat frame structure in a zero-gravity state according to an embodiment of the present invention;

[0039] Figure 4 A side view of the zero-gravity seat frame structure in a zero-gravity state according to an embodiment of the present invention;

[0040] Figure 5 An exploded view of the zero-gravity chair frame mechanism according to an embodiment of the present invention;

[0041] Figure 6 A connection diagram of a screw drive device and a connecting rod assembly in a zero-gravity seat frame mechanism according to an embodiment of the present invention;

[0042] Figure 7 It is a structural schematic diagram of a fixing frame in a zero-gravity chair frame mechanism according to an embodiment of the present invention;

[0043] Figure 8 It is a schematic structural diagram of a rotating block in a zero-gravity chair frame mechanism according to an embodiment of the present invention.

[0044] Wherein: 1- bracket; 11- second skeleton connecting rod;

[0045] 2-seat frame; 21-seat cushion frame; 211-first frame connecting rod; 212-left beam; 213-right beam; 214-first crossbar; 215-second crossbar; 216-third crossbar; 217-first front beam; 218-second front beam; 219-connecting rod; 22-backrest frame;

[0046] 3-screw drive device; 31-screw; 32-motor; 33-rotating block; 331-rotating block body; 332-third connecting arm; 333-fourth connecting arm; 334-first motor shaft; 335-second motor shaft; 34-fixed frame; 341-bottom plate; 342-first connecting arm; 3421-first arc groove; 343-second connecting arm; 3431-second arc groove; 35-fixed plate;

[0047] 4-connecting rod assembly; 41-first connecting rod; 42-second connecting rod; 43-third connecting rod; 44-fourth connecting rod; 45-first rotating shaft; 46-second rotating shaft; 47-third rotating shaft; 48-fourth rotating shaft;

[0048] 5- Synchronous rod;

[0049] 6- Anchor bracket;

[0050] 7- Horizontal slide rail. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0052] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0053] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] It should be understood that although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0055] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0056] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0057] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0058] Example 1

[0059] See also Figure 1-Figure 8 As shown, a zero-gravity chair frame mechanism provided in an embodiment of the present application includes:

[0060] Bracket 1, bracket 1 is fixed inside the vehicle;

[0061] The seat frame 2 is arranged on the upper part of the bracket 1; the seat frame 2 includes a cushion frame 21 and a backrest frame 22, the lower end of the backrest frame 22 is hinged to the first end of the cushion frame 21, and the first end of the cushion frame 21 is rotatably connected to the first end of the bracket 1;

[0062] The screw drive device 3 is fixedly connected to the bracket 1. The screw 31 of the screw drive device 3 performs linear motion. The screw 31 is driven and connected to the second end of the seat cushion frame 21 to drive the second end of the seat cushion frame 21 to rise and fall.

[0063] In this embodiment, the seat cushion frame 21 and the backrest frame 22 are both set in a square shape, and accordingly, the bracket 1 is also set in a square shape. The first ends of the bracket 1 and the seat cushion frame 21 are both rear ends, and the second ends are both front ends. The lower end of the backrest frame 22 is hinged to the rear end of the seat cushion frame 21 to achieve the angle adjustment of the backrest frame 22, and the rear end of the seat cushion frame 21 is rotatably connected to the rear end of the bracket 1 to achieve the rise and fall of the front end of the seat cushion frame 21.

[0064] The seat frame 21 includes a left beam 212 and a right beam 213, and a first cross bar 214, a second cross bar 215 and a third cross bar 216 are connected between the left beam 212 and the right beam 213; the first cross bar 214 is connected to the rear end of the seat frame 21, and the second cross bar 215 and the third cross bar 216 are connected to the front end of the seat frame 21. The second cross bar 215 and the third cross bar 216 are arranged at different heights, and the left and right sides of the second cross bar 215 and the third cross bar 216 are respectively connected to the first front beam 217 and the second front beam 218. A plurality of connecting rods 219 of different thicknesses are distributed and connected between the left beam 212, the right beam 213, the first cross bar 214, the second cross bar 215, the third cross bar 216, the first front beam 217 and the second front beam 218.

[0065] This embodiment further includes a ground bracket 6 and a transverse slide rail 7. The ground bracket 6 is mounted on the longitudinal slide rail inside the vehicle to achieve longitudinal adjustment of the seat frame 2. The transverse slide rail 7 is mounted on the ground bracket 6, and the bracket 1 is mounted on the transverse slide rail 7 to achieve transverse adjustment of the seat frame 2.

[0066] The screw 31 of the screw drive device 3 drives the front end of the seat cushion frame 21 to rise or fall by performing linear motion. Compared with other drive devices such as drive gears, the linear drive method has a smoother transmission and is less affected by the load. It can reduce the jitter caused by the sudden change of load during the seat angle adjustment process and improve the riding comfort.

[0067] Furthermore, the screw rod 31 drives the second end of the seat cushion frame 21 to rise and fall through the connecting rod assembly 4;

[0068] The connecting rod assembly 4 includes a first connecting rod 41, a second connecting rod 42, a third connecting rod 43 and a fourth connecting rod 44;

[0069] The first end of the first connecting rod 41 is fixed on the bracket 1; the middle part of the second connecting rod 42 is rotatably connected to the second end of the first connecting rod 41 through the first rotating shaft 45, the first end of the second connecting rod 42 is rotatably connected to the screw rod 31 through the second rotating shaft 46, the second end of the second connecting rod 42 is rotatably connected to the first end of the third connecting rod 43 through the third rotating shaft 47, the second end of the third connecting rod 43 is rotatably connected to the first end of the fourth connecting rod 44 through the fourth rotating shaft 48, and the second end of the fourth connecting rod 44 is fixedly connected to the second end of the seat cushion frame 21.

[0070] In the above configuration, the first rotating shaft 45 and the fourth rotating shaft 48 are both fixed rotating shafts. The first rotating shaft 45 is fixed to the second end of the first connecting rod 41, and the fourth rotating shaft 48 is fixed to the first end of the fourth connecting rod 44. The second end of the fourth connecting rod 44 is specifically fixedly connected to the second cross bar 215 by welding.

[0071] The screw rod 31 translates forward along a straight line, pushing the second link 42 to rotate clockwise along the first rotating shaft 45, the second link 42 rotates through the third rotating shaft 47 to push the third link 43 to move upward, the third link 43 drives the fourth link 44 to move upward through the fourth rotating shaft 48, and the upward movement of the fourth link 44 drives the rear end of the seat cushion frame 21 to rotate upward around the rear end of the bracket 1, thereby lifting the front end of the seat cushion frame 21 to a certain angle. The screw rod 31 translates backward along a straight line, pulling the second link 42 to rotate counterclockwise along the first rotating shaft 45, the second link 42 rotates through the third rotating shaft 47 to pull the third link 43 to move downward, the third link 43 drives the fourth link 44 to move downward through the fourth rotating shaft 48, and the downward movement of the fourth link 44 drives the rear end of the seat cushion frame 21 to rotate downward around the rear end of the bracket 1, thereby lowering the front end of the seat cushion frame 21 to a certain angle.

[0072] During the above adjustment process, the screw rod 31 adaptively rotates following the second connecting rod 42 via the second rotating shaft 46 to prevent the connecting rod assembly 4 from being stuck during operation.

[0073] Further, the connection point between the middle portion of the second connecting rod 42 and the second end of the first connecting rod 41 is the first connection point (i.e., the first rotating shaft 45), the connection point between the first end of the second connecting rod 42 and the screw rod 31 is the second connection point (i.e., the second rotating shaft 46), and the connection point between the second end of the second connecting rod 42 and the third connecting rod 43 is the third connection point (i.e., the third rotating shaft 47);

[0074] The distance between the first connection point and the second connection point is smaller than the distance between the first connection point and the third connection point.

[0075] The above arrangement utilizes the lever principle to increase the transmission torque of the transmission structure, and can enable the screw rod 31 to move a smaller distance to achieve a larger angle lift. The smaller movement distance of the screw rod 31 indirectly reduces the probability of jitter during the transmission process.

[0076] Furthermore, two groups of screw drive devices 3 are provided, which are respectively fixed on both sides of the bracket 1;

[0077] Two groups of connecting rod assemblies 4 are provided corresponding to the screw drive device 3 , and the two third connecting rods 43 are connected by a synchronization rod 5 .

[0078] Through two sets of screw drive devices 3 and connecting rod assembly 4, a stable whole is formed, so that the seat frame can be lifted or lowered synchronously and stably.

[0079] Furthermore, the two sets of screw drive devices 3 each include a screw 31, a motor 32, a rotating block 33 and a fixing frame 34;

[0080] The fixing frame 34 is fixed on the bracket 1;

[0081] One end of the motor 32 is connected to the fixed frame 34 through the rotating block 33, and rotates horizontally relative to the fixed frame 34;

[0082] The rotating block 33 is internally rotatably connected with a nut (not shown), the transmission shaft of the motor 32 is connected to the nut, and the driving nut rotates inside the rotating block 33; the first end of the screw rod 31 is rotatably connected to the first end of the second connecting rod 42, and the second end of the screw rod 32 is threadedly connected to the inside of the nut and performs linear motion inside the nut.

[0083] Two sets of screw drive devices 3 are fixed on the inner side of the bracket 1. The movement direction of the screw 31 is perpendicular to the motor 32. The transmission shaft of the motor 32 drives the nut to rotate inside the rotating block 33. The nut drives the screw 31 to realize the linear movement of the screw 31. The rotating block 33 is connected to one end of the motor 32 and rotates horizontally relative to the fixed frame 34. The horizontal rotation of the rotating block 33 drives the motor 32 and the screw 31 to rotate, so that the screw 31 can rotate adaptively following the second connecting rod 42.

[0084] Further, the fixing frame 34 includes a bottom plate 341, a first connecting arm 342 and a second connecting arm 343;

[0085] The bottom plate 341 is fixed to the bracket 1 through the fixing plate 35;

[0086] The first connecting arm 342 and the second connecting arm 343 are fixed to two sides of the bottom plate 341 , and the rotating block 33 is rotatably connected in a space formed by the first connecting arm 342 and the second connecting arm 343 .

[0087] Specifically, a first end of the fixing plate 35 is fixed to the bracket 1, and the fixing frame 34 is fixed to a second end of the fixing plate 35. The first connecting arm 342 and the second connecting arm 343 are both configured to be arc-shaped.

[0088] Further, the rotating block 33 includes a rotating block body 331, a third connecting arm 332 and a fourth connecting arm 333;

[0089] The third connecting arm 332 is connected to the rotating block body 331 via the first motor shaft 334, and the fourth connecting arm 333 is connected to the rotating block body 331 via the second motor shaft 335;

[0090] The rotating block 33 rotates relative to the fixing frame 34 via the first motor shaft 334 and the second motor shaft 335 .

[0091] The first connecting arm 342 and the second connecting arm 343 have a first arc-shaped groove 3421 and a second arc-shaped groove 3431 respectively formed at their upper ends;

[0092] The first motor shaft 334 and the second motor shaft 335 are rotatably connected to the first arc slot 3421 and the second arc slot 3431 respectively.

[0093] Through the above arrangement, the horizontal rotation of the rotating block 33 relative to the fixing frame 34 is achieved, and then the screw rod 31 is adaptively rotated following the second connecting rod 42 .

[0094] Further, a first frame connecting rod 211 is provided at the bottom of the first end of the seat cushion frame 21;

[0095] A second skeleton connecting rod 11 is provided at the first end of the bracket 1;

[0096] The first skeleton link 211 is hinged to the second skeleton link 11 .

[0097] Through the above arrangement, the rear end of the seat cushion frame 21 is rotatably connected to the bracket 1, thereby achieving the lifting or lowering of the front end of the seat cushion frame 21.

[0098] Example 2

[0099] This embodiment provides a vehicle, comprising at least one zero-gravity seat frame mechanism as described above.

[0100] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0101] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A zero-gravity seat frame structure, characterized in that: include: A bracket (1), wherein the bracket (1) is fixed inside the vehicle; A seat frame (2), the seat frame (2) being arranged on the upper part of the bracket (1); the seat frame (2) comprising a seat cushion frame (21) and a backrest frame (22), the lower end of the backrest frame (22) being hinged to the first end of the seat cushion frame (21), and the first end of the seat cushion frame (21) being rotatably connected to the first end of the bracket (1); A screw drive device (3), wherein the screw drive device (3) is fixedly connected to the bracket (1), a screw (31) of the screw drive device (3) performs linear motion, and the screw (31) is drivingly connected to the second end of the seat cushion frame (21), driving the second end of the seat cushion frame (21) to rise and fall.

2. The zero-gravity chair frame structure according to claim 1, characterized in that: The screw rod (31) drives the second end of the seat cushion frame (21) to rise and fall through the connecting rod assembly (4); The connecting rod assembly (4) comprises a first connecting rod (41), a second connecting rod (42), a third connecting rod (43) and a fourth connecting rod (44); The first end of the first connecting rod (41) is fixed on the bracket (1); the middle part of the second connecting rod (42) is rotationally connected to the second end of the first connecting rod (41), the first end of the second connecting rod (42) is rotationally connected to the screw rod (31), the second end of the second connecting rod (42) is rotationally connected to the first end of the third connecting rod (43), the second end of the third connecting rod (43) is rotationally connected to the first end of the fourth connecting rod (44), and the second end of the fourth connecting rod (44) is fixedly connected to the second end of the seat cushion frame (21).

3. The zero-gravity chair frame structure according to claim 2, characterized in that: The connection point between the middle part of the second connecting rod (42) and the second end of the first connecting rod (41) is the first connection point, the connection point between the first end of the second connecting rod (42) and the screw rod (31) is the second connection point, and the connection point between the second end of the second connecting rod (42) and the third connecting rod (43) is the third connection point; A distance between the first connection point and the second connection point is smaller than a distance between the first connection point and the third connection point.

4. The zero-gravity chair frame structure according to claim 2, characterized in that: The screw drive device (3) is provided in two groups and is respectively fixed on two sides of the bracket (1); The connecting rod assembly (4) is provided in two groups corresponding to the screw drive device (3), and the two third connecting rods (43) are connected via a synchronization rod (5).

5. The zero-gravity chair frame structure according to claim 4, characterized in that: The two sets of screw drive devices (3) each comprise a screw (31), a motor (32), a rotating block (33) and a fixing frame (34); The fixing frame (34) is fixed on the bracket (1); One end of the motor (32) is connected to the fixed frame (34) through the rotating block (33) and rotates horizontally relative to the fixed frame (34); A nut is rotatably connected inside the rotating block (33), and a transmission shaft of the motor (32) is connected to the nut, driving the nut to rotate inside the rotating block (33); a first end of the screw rod (31) is rotatably connected to a first end of the second connecting rod (42), and a second end of the screw rod (32) is screwed to the inside of the nut and performs linear motion inside the nut.

6. The zero-gravity chair frame structure according to claim 5, characterized in that: The fixing frame (34) comprises a bottom plate (341), a first connecting arm (342) and a second connecting arm (343); The bottom plate (341) is fixed to the bracket (1) via a fixing plate (35); The first connecting arm (342) and the second connecting arm (343) are fixed to two sides of the bottom plate (341), and the rotating block (33) is rotatably connected in a space formed by the first connecting arm (342) and the second connecting arm (343).

7. The zero-gravity chair frame structure according to claim 6, characterized in that: The rotating block (33) comprises a rotating block body (331), a third connecting arm (332) and a fourth connecting arm (333); The third connecting arm (332) is connected to the rotating block body (331) via a first motor shaft (334), and the fourth connecting arm (333) is connected to the rotating block body (331) via a second motor shaft (335); The rotating block (33) rotates relative to the fixed frame (34) via the first motor rotating shaft (334) and the second motor rotating shaft (335).

8. The zero-gravity chair frame structure according to claim 7, characterized in that: A first arc-shaped groove (3421) and a second arc-shaped groove (3431) are respectively formed at the upper ends of the first connecting arm (342) and the second connecting arm (343); The first motor shaft (334) and the second motor shaft (335) are rotatably connected to the first arc-shaped slot (3421) and the second arc-shaped slot (3431) respectively.

9. The zero-gravity chair frame structure according to claim 1, characterized in that: A first frame connecting rod (211) is provided at the bottom of the first end of the seat cushion frame (21); A second skeleton connecting rod (11) is provided at the first end of the bracket (1); The first skeleton connecting rod (211) is hinged to the second skeleton connecting rod (11).

10. A vehicle, characterized in that: Comprising at least one zero-gravity seat frame mechanism as described in any one of claims 1-9.

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