Zero-gravity seat framework driven by lockable hydraulic rod

Abstract

The utility model relates to the field of seat frameworks, in particular to a lockable hydraulic rod driven zero-gravity seat framework which comprises a seat basin assembly and a connecting rod mechanism, the seat basin assembly is defined by a front transverse pipe, a rear transverse pipe and seat cushion wall plates located on the two sides, and the front transverse pipe and the rear transverse pipe are rotationally connected with the seat cushion wall plates; the zero-gravity seat framework comprises a seat basin assembly, two sliding rails are arranged below the seat basin assembly side by side, each sliding rail comprises a lower rail and an upper rail arranged on the lower rail in a sliding mode, and the seat basin assembly is connected with the upper rails through a connecting rod mechanism. Stepless adjustment and stepless locking can be achieved without motor control, various sound problems caused by motor lead screw transmission or gear and rack transmission are well solved, and meanwhile the defect that a common air supporting rod is not high in locking strength is overcome. And the device has the characteristics of low cost, high strength and good self-locking performance.

Description

Technical Field

[0001] The invention relates to the field of seat frames, and in particular to a zero-gravity seat frame driven by a lockable hydraulic rod. Background Art

[0002] As the pace of life accelerates, people's requirements for the comfort of car seats continue to increase. In recent years, most new models launched on the market are equipped with zero-gravity seats, which are characterized by creating a sense of weightlessness in outer space, allowing people to be in a completely relaxed state. From the skeleton point of view, the core concept of zero gravity is to use the mechanism to make the thighs higher and the back closer to the ground, so that people are in a suspended state, which can better allow passengers to release pressure and get a good riding experience. Usually, the front zero-gravity seats can switch between three states: sitting, napping, and lying.

[0003] Currently, most zero-gravity chairs on the market are realized by motor-driven connecting rod displacement structures and electric screw-driven connecting rod displacement structures, such as Chinese Patent CN 114889503 A and Chinese Patent CN 116872805A. Although these solutions can achieve zero-gravity adjustment, they all rely on motors to drive multiple parts to complete related actions, require special controllers and modules, and have high usage costs.

[0004] In addition, there is another big problem. Electric cars are quieter than fuel cars, so the decibel value and sound quality requirements when adjusting the seat are more stringent. The above technical solution uses a motor to provide power for the frame adjustment. The motor's gear worm changes from an empty state to a loaded state, and the motor's gear box will inevitably produce noise. This is determined by the mechanical structure itself. At the same time, since the internal resistance of the frame cannot be exactly the same in each position, this will inevitably produce sound changes due to different motor running speeds, causing clients to complain about poor sound quality.

[0005] In the known technology, there are also cases where the seat adjustment mechanism uses a gas strut as a driving device, but there is no case where the zero-gravity adjustment mechanism uses a gas strut as a driving device, and the locking strength of the gas strut used for the seat driving device is not high. The figure below shows the structure of a traditional gas strut. It can be seen that the traditional gas strut converts the mechanical energy generated by the external force into the molecular potential energy of compressed nitrogen. When the external force is removed, the piston cannot be locked automatically, and naturally it is difficult to ensure the structural strength of the zero-gravity frame at any position. An additional locking mechanism is required, which has great limitations in practical applications.

[0006] Therefore, it is necessary to provide a zero-gravity seat frame driven by a lockable hydraulic rod to solve the above technical problems. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a zero-gravity seat frame driven by a lockable hydraulic rod.

[0008] The invention provides a lockable hydraulic rod-driven zero-gravity seat frame, comprising a seat pot assembly and a connecting rod mechanism, wherein the seat pot assembly is surrounded by a front transverse tube, a rear transverse tube and seat cushion wall panels on both sides, and the front transverse tube and the rear transverse tube are rotatably connected to the seat cushion wall panels, two slide rails are arranged side by side below the seat pot assembly, the slide rails include a lower rail and an upper rail slidably arranged on the lower rail, the seat pot assembly is connected to the upper rail through a connecting rod mechanism, the connecting rod mechanism comprises a front connecting rod assembly symmetrically arranged on both sides of the front end of the bottom of the seat pot assembly and a rear connecting rod and a tooth plate arranged on both sides of the rear end of the bottom of the seat pot assembly, the upper ends of the rear connecting rod and the tooth plate are fixedly connected to the rear transverse tube, and the lower ends are hinged to the rear end of the upper rail on the same side, an adjusting motor for adjusting the height of the seat pot assembly is fixed to one of the side walls of the seat cushion wall panels, a gear is fixed to the output end of the adjusting motor, and the gear is meshedly connected to the tooth plate;

[0009] The front connecting rod assembly consists of a lower front connecting rod and an upper front connecting rod, wherein the lower end of the lower front connecting rod is hinged at the front end of the upper rail on the same side, the upper end of the lower front connecting rod is hinged to the lower end of the upper front connecting rod, and the upper end of the upper front connecting rod is fixedly connected to the front cross tube, and a U-shaped plate is fixed to the rear end of one of the upper rails, and a mounting frame is hinged on the U-shaped plate, and a lockable hydraulic rod is provided under the seat basin assembly, and the piston rod end of the lockable hydraulic rod is fixedly connected to the release head, and the cylinder end of the lockable hydraulic rod is hinged with a connecting plate, and the end of the connecting plate away from the cylinder body is fixedly connected to the front cross tube, and a driving device for squeezing the release head end of the lockable hydraulic rod is installed on the seat cushion wall panel.

[0010] Preferably, the driving device includes a connecting frame fixed to the side wall of the seat cushion wall panel, a first driving plate is hinged on the connecting frame through a hinge shaft, a second driving plate is hinged on the mounting frame through a hinge shaft, and the second driving plate is in contact with the release head, a brake zipper is provided between the mounting frame and the connecting frame, the brake zipper includes a jacket and a steel wire rope installed inside the jacket, two ends of the jacket are respectively fixed to the mounting frame and the connecting frame, and two ends of the steel wire rope are respectively fixedly connected to the first driving plate and the second driving plate.

[0011] Preferably, a connecting plate is fixed between the upper rails.

[0012] Preferably, a pressure plate is slidably connected to the connecting frame, the bottom end of the pressure plate is in contact with the first driving plate, a spring is sleeved on the pressure plate, and the spring is located between the top end of the pressure plate and the connecting frame.

[0013] Preferably, the contact point between the second drive plate and the release head is located between the hinge point between the second drive plate and the mounting frame and the connection point between the second drive plate and the wire rope.

[0014] Preferably, two connecting plates are provided.

[0015] Compared with the related art, the present invention has the following beneficial effects:

[0016] The zero-pressure seat can be locked at any position. The lockable hydraulic rod can be released and locked by the cable to cooperate with the movement of the zero-gravity seat linkage mechanism. The lockable hydraulic rod can be stopped and unlocked again at any desired position to achieve the switch between the sitting state and the zero-gravity state. The core of the technical solution of the present invention is to use a self-locking lockable hydraulic rod to drive the zero-gravity seat adjustment mechanism, which is noise-free and can achieve stepless adjustment and stepless locking without motor control. It solves the various sound problems caused by motor screw drive or gear rack drive, and solves the disadvantage of low locking strength of ordinary gas struts. It has the characteristics of low cost, high strength and good self-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the lower front link and the upper front link of the present invention;

[0019] Figure 3 It is a schematic diagram of the relative positions of the lockable hydraulic rod of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the driving device of the present invention;

[0021] Figure 5 It is a schematic diagram of the hinge point distribution of the present invention;

[0022] Figure 6 It is a schematic diagram of the hinge point distribution of the present invention;

[0023] Figure 7 This is a schematic diagram of a normal riding state of the present invention;

[0024] Figure 8 It is a schematic diagram of the zero gravity state of the present invention.

[0025] Numbers in the figure: 1. seat basin assembly; 2. connecting rod mechanism; 3. front cross tube; 4. rear cross tube; 5. seat cushion wall panel; 6. slide rail; 7. lower rail; 8. upper rail; 9. front connecting rod assembly; 10. rear connecting rod; 11. tooth plate; 12. adjustment motor; 13. gear; 14. lower front connecting rod; 15. upper front connecting rod; 16. U-shaped plate; 17. mounting frame; 18. lockable hydraulic rod; 19. connecting plate; 20. drive device; 21. connecting frame; 22. articulated shaft; 23. first drive plate; 24. second drive plate; 25. brake zipper; 26. outer cover; 27. wire rope; 28. release head; 29. ​​pressure plate; 30. spring; 31. connecting plate. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0027] Please refer to Figures 1 to 8 A lockable hydraulic rod driven zero gravity seat frame comprises a seat pot assembly 1 and a connecting rod mechanism 2, wherein the seat pot assembly 1 is surrounded by a front transverse tube 3, a rear transverse tube 4 and seat cushion wall panels 5 located on both sides, and the front transverse tube 3, the rear transverse tube 4 are rotatably connected with the seat cushion wall panels 5, two slide rails 6 are arranged side by side below the seat pot assembly 1, and the slide rail 6 comprises a lower rail 7 and an upper rail 8 slidably arranged on the lower rail 7, and the seat pot assembly 1 is connected to the upper rail 8 through the connecting rod mechanism 2, and the connecting rod mechanism 2 comprises symmetrically arranged on both sides of the front end of the bottom of the seat pot assembly 1 The front connecting rod assembly 9 and the rear connecting rod 10 and the tooth plate 11 are arranged on both sides of the rear end of the bottom of the seat basin assembly 1, the upper ends of the rear connecting rod 10 and the tooth plate 11 are fixedly connected to the rear cross tube 4, the relative hinge point of the tooth plate 11 and the seat cushion wall plate 5 is A, the lower end is hinged to the rear end of the upper rail 8 on the same side, and the hinge point of the tooth plate 11 and the upper rail 8 is B, one of the side walls of the seat cushion wall plate 5 is fixed with an adjusting motor 12 for adjusting the height of the seat basin assembly 1, the output end of the adjusting motor 12 is fixed with a gear 13, and the gear 13 is meshed and connected with the tooth plate 11;

[0028] The front link assembly 9 is composed of a lower front link 14 and an upper front link 15, wherein the lower end of the lower front link 14 is hinged to the front end of the upper rail 8 on the same side, and the hinge point is C. The upper end of the lower front link 14 is hinged to the lower end of the upper front link 15, and the hinge point is D. The upper end of the upper front link 15 is fixedly connected to the front cross tube 3, and the relative hinge point between the upper front link 15 and the cushion wall panel 5 is E. A U-shaped plate 16 is fixed to the rear end of one of the upper rails 8, and a mounting frame 17 is hinged on the U-shaped plate 16, and the hinge point is F. The lower end of the seat basin assembly 1 A lockable hydraulic rod 18 is provided (the prior art will not be described in detail), the piston rod end of the lockable hydraulic rod 18 is fixedly connected to the release head 28, the cylinder end of the lockable hydraulic rod 18 is hinged with a connecting plate 19, the hinge point is G, the end of the connecting plate 19 away from the cylinder body is fixedly connected to the front cross pipe 3, the relative hinge point between the connecting plate 19 and the seat cushion wall panel 5 is H, point H coincides with point E, and a driving device 20 for squeezing the end of the release head 28 of the lockable hydraulic rod 18 is installed on the seat cushion wall panel 5.

[0029] The driving device 20 includes a connecting frame 21 fixed to the side wall of the seat cushion wall panel 5, a first driving plate 23 is hinged on the connecting frame 21 through a hinge shaft 22, a second driving plate 24 is hinged on the mounting frame 17 through the hinge shaft 22, and the second driving plate 24 is in contact with a release head 28, a brake zipper 25 is provided between the mounting frame 17 and the connecting frame 21, the brake zipper 25 includes a sleeve 26 and a steel wire rope 27 installed inside the sleeve 26, two ends of the sleeve 26 are respectively fixed to the mounting frame 17 and the connecting frame 21, and two ends of the steel wire rope 27 are respectively fixedly connected to the first driving plate 23 and the second driving plate 24.

[0030] When the adjusting motor 12 is not working, the output shaft of the adjusting motor 12 is in a locked state, and the tooth plate 11 is relatively fixed and locked with the cushion wall panel 5. At this time, the cushion wall panel 5, the tooth plate 11, the upper rail 8, the lower front link 14 and the upper front link 15 form a quadrilateral BCDE; the cushion wall panel 5, the tooth plate 11, the upper rail 8, the U-shaped plate 16, the mounting frame 17, the lockable hydraulic rod 18 and the connecting plate 19 form a quadrilateral BFGH. Since the H point coincides with the E point, BCDE and BFGH share a side, BE and BH coincide, and the distance between the D point and the G point remains unchanged, the degrees of freedom of the quadrilateral BFGH and the quadrilateral BCDE are mutually restricted. Therefore, when the length of the four sides of BFGH does not change, the quadrilateral BCDE will not deform. When the length of the lockable hydraulic rod 18 changes, the length of FG changes accordingly, the angles of the quadrilateral BFGH change accordingly, and the angles of the quadrilateral BCDE change accordingly.

[0031] A pressing plate 29 is slidably connected to the connecting frame 21 , and the bottom end of the pressing plate 29 contacts the first driving plate 23 . A spring 30 is sleeved on the pressing plate 29 , and the spring 30 is located between the top end of the pressing plate 29 and the connecting frame 21 .

[0032] The specific adjustment is as follows: the passenger presses the pressure plate 29, and the pressure plate 29 squeezes the first drive plate 23 to rotate the first drive plate 23 along the hinge axis. The first drive plate 23 pulls the wire rope 27 through the lever principle, and the wire rope 27 drives the second drive plate 24 to rotate along the hinge axis. The second drive plate 24 squeezes the end of the release head 28, triggering the piston valve in the lockable hydraulic rod 18 to open, releasing the internal pressure piston rod to push the BFGH connecting rod mechanism to expand to achieve zero gravity posture adjustment, such as Figure 3 shown.

[0033] When the pressure plate 29 is released, the piston valve is closed and no pressure is released, and the BFGH connecting rod is self-locked in the desired position.

[0034] A connecting plate 31 is fixed between the upper rails 8 to make the slide rail 6 more stable.

[0035] The contact point between the second driving plate 24 and the release head 28 is located between the hinge point between the second driving plate 24 and the mounting frame 17 and the connection point between the second driving plate 24 and the wire rope 27 .

[0036] The working principle of the lockable hydraulic rod (the prior art is briefly described here) is that when the unlocking device is pressed, the piston valve opens, nitrogen flows through the piston when elastic locking is applied, and hydraulic oil flows through the piston when rigid locking is applied, and the piston rod either extends or is compressed. When the unlocking device is released, the gas spring valve automatically closes and the piston rod stops at the current position. The hydraulic rod can be selected to be elastically locked or completely rigidly locked.

[0037] The two connecting plates 19 are provided to make the connection between the lockable hydraulic rod 18 and the front cross pipe 3 more stable.

[0038] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lockable hydraulic rod driven zero gravity seat frame, comprising a seat pan assembly (1) and a connecting rod mechanism (2), wherein the seat pan assembly (1) is surrounded by a front transverse tube (3), a rear transverse tube (4) and seat cushion wall panels (5) located on both sides, and the front transverse tube (3), the rear transverse tube (4) and the seat cushion wall panels (5) are rotatably connected, two slide rails (6) are arranged side by side below the seat pan assembly (1), the slide rails (6) include a lower rail (7) and an upper rail (8) slidably arranged on the lower rail (7), the seat pan assembly (1) is connected to the upper rail (8) through the connecting rod mechanism (2), and the connecting rod mechanism (2) comprising a front connecting rod assembly (9) symmetrically arranged on both sides of the front end of the bottom of the seat basin assembly (1) and a rear connecting rod (10) and a tooth plate (11) arranged on both sides of the rear end of the bottom of the seat basin assembly (1), wherein the upper ends of the rear connecting rod (10) and the tooth plate (11) are fixedly connected to the rear transverse tube (4), and the lower ends are hinged to the rear end of the upper rail (8) on the same side, and an adjusting motor (12) for adjusting the height of the seat basin assembly (1) is fixed to the side wall of one of the seat cushion wall panels (5), and a gear (13) is fixed to the output end of the adjusting motor (12), and the gear (13) is meshingly connected to the tooth plate (11); It is characterized in that The front connecting rod assembly (9) is composed of a lower front connecting rod (14) and an upper front connecting rod (15), wherein the lower end of the lower front connecting rod (14) is hinged to the front end of the upper rail (8) on the same side, the upper end of the lower front connecting rod (14) is hinged to the lower end of the upper front connecting rod (15), the upper end of the upper front connecting rod (15) is fixedly connected to the front cross tube (3), a U-shaped plate (16) is fixed to the rear end of one of the upper rails (8), a mounting frame (17) is hinged on the U-shaped plate (16), and the seat basin A lockable hydraulic rod (18) is provided below the assembly (1), the piston rod end of the lockable hydraulic rod (18) is fixedly connected to a release head (28), a connecting plate (19) is hingedly connected to the cylinder end of the lockable hydraulic rod (18), and the end of the connecting plate (19) away from the cylinder is fixedly connected to the front cross pipe (3), and a driving device (20) for squeezing the end of the release head (28) of the lockable hydraulic rod (18) is installed on the seat cushion wall panel (5).

2. A lockable hydraulic rod driven zero gravity seat frame according to claim 1, characterized in that: The driving device (20) comprises a connecting frame (21) fixed to the side wall of the cushion wall plate (5), a first driving plate (23) being hingedly connected to the connecting frame (21) via a hinge shaft (22), a second driving plate (24) being hingedly connected to the mounting frame (17) via a hinge shaft (22), and the second driving plate (24) being in contact with a release head (28), a brake zipper (25) being arranged between the mounting frame (17) and the connecting frame (21), the brake zipper (25) comprising a jacket (26) and a steel wire rope (27) installed inside the jacket (26), two ends of the jacket (26) being respectively fixed to the mounting frame (17) and the connecting frame (21), and two ends of the steel wire rope (27) being respectively fixedly connected to the first driving plate (23) and the second driving plate (24).

3. The lockable hydraulic rod driven zero gravity seat frame according to claim 1, characterized in that: A connecting plate (31) is fixed between the upper rails (8).

4. The lockable hydraulic rod driven zero gravity seat frame according to claim 2, characterized in that: A pressing plate (29) is slidably connected to the connecting frame (21), the bottom end of the pressing plate (29) contacts the first driving plate (23), and a spring (30) is sleeved on the pressing plate (29), and the spring (30) is located between the top end of the pressing plate (29) and the connecting frame (21).

5. The lockable hydraulic rod driven zero gravity seat frame according to claim 2, characterized in that: The contact point between the second drive plate (24) and the release head (28) is located between the hinge point between the second drive plate (24) and the mounting frame (17) and the connection point between the second drive plate (24) and the wire rope (27).

6. The lockable hydraulic rod driven zero gravity seat frame according to claim 1, characterized in that: Two connecting plates (19) are provided.

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