Stepless height adjusting mechanism for air bag suspension seat

Abstract

The invention relates to the field of seat height adjusting devices, in particular to an air bag suspension seat stepless height adjusting mechanism which comprises an upper sliding groove frame assembly, an X arm assembly, a lower sliding groove frame assembly, an air bag, a height valve assembly and a height adjusting switch. The X-arm assembly comprises an outer X-arm welding assembly and an inner X-arm welding assembly, the outer X-arm welding assembly and the inner X-arm welding assembly are rotationally connected through a middle transverse pipe fixed to the inner X-arm welding assembly, and a transverse pipe at the rear end of the outer X-arm welding assembly is hinged to the upper sliding groove frame assembly. According to the stepless height adjusting mechanism for the air bag suspension seat, the height can be adjusted in a stepless mode, the height of the posture of a driver and passengers can be adjusted to any position, the air pressure of an air bag is directly adjusted and controlled to achieve height adjustment, compared with a step adjusting scheme, the risk that gear adjustment is not sensitive does not exist, and the structure is simple. The structure is simple and compact, and the arrangement is convenient.

Description

Technical Field

[0001] The invention relates to the field of seat height adjustment devices, in particular to a stepless height adjustment mechanism for an airbag suspended seat. Background Art

[0002] The existing technical solutions have the following defects:

[0003] Existing suspension seat height adjustment mechanisms can be divided into two types:

[0004] 1. Handle cable structure: The handle with gears drives the cable, so that the height valve is kept in different positions to achieve height adjustment. This type of structure has step adjustment, and the height can only be adjusted to the set position. In addition, the height adjustment gear stroke of this type of structure is large, and a small stroke is prone to problems such as insensitive adjustment gears and too small shock absorption stroke, which makes it uncomfortable.

[0005] 2. Pneumatic height adjustment: The pneumatic switch controls the unlocking of the height valve and the inflation and deflation of the airbag to achieve height control. The height valve of this type of structure is controlled by the locking claw and the toothed plate to control the position of the height valve, which is also inseparable from the scope of step-by-step adjustment.

[0006] Therefore, we propose a stepless height adjustment mechanism for an airbag suspension seat to solve the above problems. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a stepless height adjustment mechanism for an airbag suspension seat.

[0008] The present invention provides a stepless height adjustment mechanism for an airbag suspension seat, comprising an upper slide groove frame assembly, an X-arm assembly, a lower slide groove frame assembly, an airbag, a height valve assembly and a height adjustment switch;

[0009] The X-arm assembly comprises an outer X-arm welding assembly and an inner X-arm welding assembly, and the outer X-arm welding assembly and the inner X-arm welding assembly are rotatably connected via an intermediate transverse tube fixed on the inner X-arm welding assembly;

[0010] The rear end transverse tube of the outer X-arm welding assembly is hinged to the upper slide chute frame assembly, and the front end transverse tube of the outer X-arm welding assembly is slidably connected to the lower slide chute frame assembly;

[0011] The rear end transverse tube of the inner X-arm welding assembly is hinged to the lower slide chute frame assembly, and the front end transverse tube of the inner X-arm welding assembly is slidably connected to the upper slide chute frame assembly;

[0012] An airbag upper bracket and an airbag lower bracket are fixed to the inner X-arm welding assembly and the lower slide groove frame assembly, respectively, and an airbag is installed between the airbag upper bracket and the airbag lower bracket;

[0013] One end of the height valve assembly is rotatably connected to the front end transverse tube of the outer X-arm welding assembly of the X-arm assembly, and the other end is rotatably connected to the middle transverse tube of the inner X-arm welding assembly of the X-arm assembly. A butterfly valve is provided at one end of the height valve assembly, a cam is provided on the butterfly plate of the butterfly valve, and a gear tooth is provided on the side wall of the cam;

[0014] A gear shaft is welded on the inner X-arm welding assembly, a gear is rotatably connected to the gear shaft, and the gear is meshed with the gear teeth of the cam side wall. A cylinder is also provided on the inner X-arm welding assembly, and the cylinder is fixedly connected to the airbag upper bracket on the inner X-arm welding assembly through rivets;

[0015] One side wall of the gear is integrally provided with a sleeve portion, on which a torsion spring is mounted, one end of which is clamped on the sheet metal of the inner X-arm welding assembly, and the other end is clamped in the waist groove of the cylinder. The initial inner diameter of the torsion spring is smaller than the outer diameter of the gear, and it can lock and fix the gear after being assembled on it;

[0016] The height adjustment switch is respectively connected with the main air source, the height valve assembly, the air bag and the air cylinder through air pipes.

[0017] Preferably, the gear shaft is provided with an annular groove, and an E-shaped retaining spring is installed in the annular groove.

[0018] Preferably, the upper slide frame assembly is formed by a U-shaped frame welding assembly, a rear end bracket, a first rotating shaft plastic sleeve and bolts fixedly connected, and the rear end cross tube of the inner X-arm welding assembly is rotatably connected to the first rotating shaft plastic sleeve.

[0019] Preferably, the lower slide chute frame assembly is rotatably connected by a front bracket, a left slide chute and a right slide chute through step bolts, and the airbag lower bracket is fixedly connected to the left slide chute and the right slide chute on the left and right sides of the bolts respectively to form a fixed frame, and a second rotating shaft plastic sleeve is provided at the rear end of the left slide chute and the right slide chute, and the second rotating shaft plastic sleeve is fixedly connected to the left slide chute and the right slide chute through bolts, and the rear end cross tube of the outer X-arm welding assembly is rotatably connected to the second rotating shaft plastic sleeve.

[0020] Preferably, the height valve assembly also includes a height valve bracket and a height valve fixing screw, wherein the butterfly valve is fixedly connected to the height valve bracket via the height valve fixing screw, and the height valve bracket is rotatably connected to the front end cross tube of the outer X-arm welding assembly.

[0021] Preferably, the height adjustment switch is a push-type pneumatic switch or a solenoid valve switch.

[0022] Preferably, the connection between the height valve bracket and the front end cross tube of the outer X-arm welding assembly is open.

[0023] Preferably, the side walls of the height valve bracket are provided with reinforcing ribs.

[0024] Compared with the related art, the present invention has the following beneficial effects:

[0025] 1. The height is steplessly adjustable, and the height of the driver and passenger posture can be adjusted to any position.

[0026] 2. Directly regulate the airbag pressure to achieve height adjustment. Compared with the step-by-step adjustment solution, there is no risk of insensitive gear adjustment, which can improve comfort.

[0027] 3. The structure is simple and compact, easy to arrange. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the outer X-arm welding assembly of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the inner X-arm welding assembly of the present invention;

[0031] Figure 4 It is a schematic diagram of the structure of the upper slide frame assembly of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the lower slide chute frame assembly of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure of the height valve assembly of the present invention;

[0034] Figure 7 It is a side structural schematic diagram of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the gear and the torsion spring of the present invention.

[0036] Numbers in the figure: 1. Upper slide frame assembly; 2. X-arm assembly; 3. Lower slide frame assembly; 4. Airbag; 5. Height valve assembly; 6. Height adjustment switch; 7. Outer X-arm welding assembly; 8. Inner X-arm welding assembly; 9. Cylinder; 11. Torsion spring; 12. Gear; 13. E-shaped retaining ring; 14. Gear shaft; 15. Upper bracket of airbag; 16. U-shaped frame welding assembly; 17. Rear end bracket; 18a. First shaft plastic cover; 18b. Second shaft plastic cover; 19. Bolt; 20. Front bracket; 21. Left slide; 22. Right slide; 23. Step bolt; 24. Bolt; 25. Lower bracket of airbag; 26. Height valve bracket; 27. Butterfly valve; 28. Height valve fixing screw; 29. ​​Butterfly piece; 30. Cam. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0038] Please refer to Figures 1 to 8 A stepless height adjustment mechanism for an airbag suspension seat is mainly composed of an upper slide groove frame assembly 1, an X-arm assembly 2, a lower slide groove frame assembly 3, an airbag 4, a height valve assembly 5 and a height adjustment switch 6. Precise connections between the components enable efficient operation.

[0039] In the X-arm assembly 2, the outer X-arm welding assembly 7 and the inner X-arm welding assembly 8 are rotatably connected through the middle cross tube fixed on the inner X-arm welding assembly 8. This design allows relative rotation between the two assemblies. The rear end cross tube of the outer X-arm welding assembly 7 is hinged to the upper chute frame assembly 1, while the front end cross tube is slidably connected to the lower chute frame assembly 3; correspondingly, the rear end cross tube of the inner X-arm welding assembly 8 is hinged to the lower chute frame assembly 3, while the front end cross tube is slidably connected to the upper chute frame assembly 1. This cross connection method provides stable support and smooth lifting function for the suspension mechanism.

[0040] In order to control the height of the suspension mechanism, an airbag upper bracket 15 and an airbag lower bracket 25 are respectively fixed to the inner X-arm welding assembly 8 and the lower slide chute frame assembly 3, and an airbag 4 is installed between the two. By filling and releasing air in the airbag 4, the rise and fall of the suspension mechanism can be accurately controlled to achieve stepless height adjustment.

[0041] The height valve assembly 5 is a key component of the adjustment mechanism. One end of the height valve assembly 5 is rotatably connected to the front end transverse tube of the outer X-arm welding assembly 7, and the other end is rotatably connected to the middle transverse tube of the inner X-arm welding assembly 8. A butterfly valve 27 is provided at one end of the height valve assembly 5, and a cam 30 is mounted on its butterfly plate 29. The side wall of the cam 30 is provided with gear teeth, which are meshed and connected with the gear 12 on the inner X-arm welding assembly 8. The gear 12 is rotatably mounted on the gear shaft 14, and the gear shaft 14 is assembled on the inner X-arm welding assembly 8. A sleeve portion is integrally provided on one side wall of the gear 12, and a torsion spring 11 is assembled on the sleeve portion. One end of the torsion spring 11 is stuck on the sheet metal of the inner X-arm welding assembly 8, and the other end is stuck in the waist groove of the cylinder 9. Its initial inner diameter is slightly smaller than the outer diameter of the gear 12, ensuring that the gear 12 can be locked and kept fixed after assembly.

[0042] In order to prevent the gear 12 from coming off the gear shaft 14, an annular groove is provided on the gear shaft 14, and an E-shaped retaining spring 13 is installed in the annular groove. In addition, the height adjustment switch 6 is connected to the main air source, the height valve assembly 5, the air bag 4 and the cylinder 9 through the air pipe, realizing remote control of the entire adjustment mechanism.

[0043] The upper chute frame assembly 1 is formed by the U-shaped frame welding assembly 16, the rear end bracket 17, the first rotating shaft plastic sleeve 18a and the bolt 19, which is fixedly connected to provide a rotation connection point for the rear end cross tube of the inner X-arm welding assembly 8. The lower chute frame assembly 3 is formed by the front bracket 20, the left chute 21 and the right chute 22 being rotatably connected by the step bolt 23. The airbag lower bracket 25 is fixed to the left chute 21 and the right chute 22 by the bolt 24, forming a sturdy fixed frame. The rear end cross tube of the outer X-arm welding assembly 7 is rotatably connected to the second rotating shaft plastic sleeve 18b at the rear end of the left chute 21 and the right chute 22.

[0044] The height valve assembly 5 also includes components such as a height valve bracket 26 and a height valve fixing screw 28. The butterfly valve 27 is fixedly connected to the height valve bracket 26 through the height valve fixing screw 28, and the height valve bracket 26 is rotatably connected to the front end transverse tube of the outer X-arm welding assembly 7. In order to facilitate installation and disassembly, the connection between the height valve bracket 26 and the front end transverse tube of the outer X-arm welding assembly 7 is designed to be open, and reinforcing ribs are set on the side wall of the height valve bracket 26 to improve its strength.

[0045] In actual operation, by pressing the lower end of the height adjustment switch 6, the compressed air in the main air source will enter the cylinder 9 through the height adjustment switch 6, pushing the torsion spring 11 to rotate counterclockwise. When the inner diameter of the torsion spring 11 becomes larger than the outer diameter of the gear 12, the gear 12 can rotate freely. At the same time, the airbag 4 is connected to the atmosphere through the height adjustment switch 6, and the gas in the airbag leaks out, causing the air pressure to decrease. Under the action of gravity, the inner X-arm welding assembly 8 rotates counterclockwise, thereby adjusting the suspension mechanism to descend. The height valve assembly 5 will also rotate to the corresponding position. When the height adjustment switch 6 is released, the air pressure in the cylinder 9 is lost, the torsion spring 11 rotates clockwise and locks the gear 12 again, making it unable to rotate. At this time, the position of the cam 30 is also fixed, and the suspension mechanism reaches a balanced state at the new position.

[0046] In actual operation, by pressing the upper end of the height adjustment switch 6, the compressed air in the main air source will enter the cylinder 9 through the height adjustment switch 6, pushing the torsion spring 11 to rotate counterclockwise. When the inner diameter of the torsion spring 11 becomes larger than the outer diameter of the gear 12, the gear 12 can rotate freely. At the same time, the airbag 4 is connected to the main air source through the height adjustment switch 6, and the airbag is inflated, and the air pressure of the airbag increases. Under the pressure of the airbag, the inner X-arm welding assembly 8 rotates clockwise, thereby adjusting the suspension mechanism to rise. The height valve assembly 5 will also rotate to the corresponding position. When the height adjustment switch 6 is released, the air pressure in the cylinder 9 is lost, the torsion spring 11 rotates clockwise and locks the gear 12 again, making it unable to rotate. At this time, the position of the cam 30 is also fixed, and the suspension mechanism reaches a balanced state in the new position.

[0047] 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 stepless height adjustment mechanism for an airbag suspension seat, characterized in that: It comprises an upper slide chute frame assembly (1), an X-arm assembly (2), a lower slide chute frame assembly (3), an air bag (4), a height valve assembly (5) and a height adjustment switch (6); The X-arm assembly (2) comprises an outer X-arm welding assembly (7) and an inner X-arm welding assembly (8), and the outer X-arm welding assembly (7) and the inner X-arm welding assembly (8) are rotatably connected via an intermediate transverse tube fixed on the inner X-arm welding assembly (8); The rear end transverse tube of the outer X-arm welding assembly (7) is hinged to the upper slide groove frame assembly (1), and the front end transverse tube of the outer X-arm welding assembly (7) is slidably connected to the lower slide groove frame assembly (3); The rear end transverse tube of the inner X-arm welding assembly (8) is hinged to the lower slide chute frame assembly (3), and the front end transverse tube of the inner X-arm welding assembly (8) is slidably connected to the upper slide chute frame assembly (1); An airbag upper bracket (15) and an airbag lower bracket (25) are fixed to the inner X-arm welding assembly (8) and the lower slide groove frame assembly (3), respectively, and an airbag (4) is installed between the airbag upper bracket (15) and the airbag lower bracket (25); One end of the height valve assembly (5) is rotatably connected to the front end transverse tube of the outer X-arm welding assembly (7) of the X-arm assembly (3), and the other end is rotatably connected to the middle transverse tube of the inner X-arm welding assembly (8) of the X-arm assembly (3). A butterfly valve (27) is provided at one end of the height valve assembly (5), a cam (30) is provided on a butterfly plate (29) of the butterfly valve (27), and a side wall of the cam (30) is provided with gear teeth. A gear shaft (14) is welded to the inner X-arm welding assembly (8), a gear (12) is rotatably connected to the gear shaft (14), and the gear (12) is meshedly connected to the gear teeth of the side wall of the cam (30). A cylinder (9) is also provided on the inner X-arm welding assembly (8), and the cylinder (9) is fixedly connected to the airbag upper bracket (15) on the inner X-arm welding assembly (8) via a rivet (10); A sleeve portion is integrally provided on one side wall of the gear (12), and a torsion spring (11) is mounted on the sleeve portion. One end of the torsion spring (11) is clamped on the sheet metal of the inner X-arm welding assembly (8), and the other end is clamped in the waist groove of the cylinder (9). The initial inner diameter of the torsion spring (11) is smaller than the outer diameter of the gear (12), and after being assembled on the gear (12), the gear (12) can be locked and fixed. The height adjustment switch (6) is respectively connected to the main air source, the height valve assembly (5), the air bag (4) and the air cylinder (9) through air pipes.

2. The stepless height adjustment mechanism of an airbag suspension seat according to claim 1, characterized in that: The gear shaft (14) is provided with an annular groove, and an E-shaped retaining ring (13) is installed in the annular groove.

3. The stepless height adjustment mechanism of an airbag suspension seat according to claim 1, characterized in that: The upper slide frame assembly (1) is formed by fixedly connecting a U-shaped frame welding assembly (16), a rear end bracket (17), a first rotating shaft plastic sleeve (18a) and bolts (19), and the rear end transverse tube of the inner X-arm welding assembly (8) is rotatably connected to the first rotating shaft plastic sleeve (18a).

4. The stepless height adjustment mechanism of an airbag suspension seat according to claim 1, characterized in that: The lower slide groove frame assembly (3) is rotatably connected by a front bracket (20), a left slide groove (21) and a right slide groove (22) through a step bolt (23); the airbag lower bracket (25) is fixedly connected to the left slide groove (21) and the right slide groove (22) on the left and right sides through bolts (24) to form a fixed frame; the rear ends of the left slide groove (21) and the right slide groove (22) are both provided with a second rotating shaft plastic sleeve (18b); the second rotating shaft plastic sleeve (18b) is fixedly connected to the left slide groove (21) and the right slide groove (22) through bolts (19); the rear end cross tube of the outer X-arm welding assembly (7) is rotatably connected to the second rotating shaft plastic sleeve (18b).

5. The stepless height adjustment mechanism of an airbag suspension seat according to claim 3, characterized in that: The height valve assembly (5) further comprises a height valve bracket (26) and a height valve fixing screw (28), wherein the butterfly valve (27) is fixedly connected to the height valve bracket (26) via the height valve fixing screw (28), and the height valve bracket (26) is rotatably connected to the front end transverse tube of the outer X-arm welding assembly (7).

6. The stepless height adjustment mechanism of an airbag suspension seat according to claim 1, characterized in that: The height adjustment switch (6) is a press-operated pneumatic switch or a solenoid valve switch.

7. The stepless height adjustment mechanism of an airbag suspension seat according to claim 5, characterized in that: The connection between the height valve bracket (26) and the front end transverse tube of the outer X-arm welding assembly (7) is in an open shape.

8. The stepless height adjustment mechanism of an airbag suspension seat according to claim 5, characterized in that: The side wall of the height valve bracket (26) is provided with reinforcing ribs.

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