A seat height suspension control mechanism and seat base

Abstract

The present invention relates to a seat height suspension control mechanism and a seat base, wherein the seat height suspension control mechanism comprises an air valve fixing plate, an air valve, an air valve pressing balance wheel and an adjusting balance wheel, wherein the adjusting balance wheel drives the air valve pressing balance wheel to rotate when the adjusting balance wheel rotates, and the air valve pressing balance wheel triggers the air valve to realize different ventilation states, and the air valve, the air valve pressing balance wheel and the adjusting balance wheel are all arranged on the air valve fixing plate, and the upper end of the air valve fixing plate is hinged to the middle connecting shaft of the seat base, and the lower end is hinged to the roller shaft of the seat base. According to the technical solution provided by the present invention, the problem that the seat height suspension control mechanism occupies a large space on the middle connecting shaft of the gallows is solved, more installation space is reserved for the seat base, and installation is also simplified.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile seats, and in particular relates to a seat height suspension control mechanism and a seat base. Background Art

[0002] In order to improve the riding comfort, the driver's seat in the car is usually provided with a pneumatic seat base, which can adjust the height of the seat according to the driver's needs and play a role in shock absorption in the up and down directions during driving. When encountering bumpy roads, the airbag in the base is adaptively inflated or exhausted to maintain the predetermined height of the seat and filter the high-frequency vibration of the car body. The seat base in the prior art usually includes an upper seat frame, a hinge frame, a lower seat frame, an airbag, a switch valve and other components. The hinge frame can be deformed during the lifting and lowering of the seat. An intermediate connecting shaft is provided in the middle of the hinge frame and a roller shaft is provided at the end. The switch valve needs to be set in the hinge frame and is usually installed by relying on the intermediate connecting shaft. The existing switch valve has the defects of large installation space, difficult installation, and complex air path. Summary of the invention

[0003] In order to solve all or part of the above problems, an object of the present invention is to provide a seat height suspension control mechanism, which reduces the installation space in the hinge by simplifying the structure.

[0004] The present invention also aims to provide a seat base, which is equipped with the above-mentioned seat height suspension control mechanism.

[0005] On the one hand, the present invention provides a seat height suspension control mechanism, including an air valve fixing plate, an air valve, an air valve pressing balance wheel and an adjusting balance wheel. When the adjusting balance wheel rotates, the air valve pressing balance wheel is driven to rotate. The air valve pressing balance wheel triggers the air valve to achieve different ventilation states. The air valve, the air valve pressing balance wheel and the adjusting balance wheel are all arranged on the air valve fixing plate. The upper end of the air valve fixing plate is hinged to the middle connecting shaft of the seat base, and the lower end is hinged to the roller shaft of the seat base.

[0006] Optionally, a U-shaped groove is provided at the lower end of the air valve fixing plate, and the air valve fixing plate is supported on the roller shaft through the U-shaped groove.

[0007] Optionally, a first mounting hole is provided at the upper end of the air valve fixing plate, a third mounting hole is provided on the adjusting balance wheel, and the first mounting hole and the third mounting hole are coaxially installed and sleeved on the middle connecting shaft of the seat base.

[0008] Optionally, arc-shaped anti-wear ribs are provided around the periphery of the first mounting hole, and the anti-wear ribs allow a gap to exist between adjacent surfaces of the regulating balance wheel and the air valve fixing plate.

[0009] Optionally, an arc-shaped limiting groove is arranged around the first mounting hole, and a hook is arranged on the adjusting balance wheel, and the hook extends into the limiting groove. When the adjusting balance wheel rotates, the hook slides in the limiting groove.

[0010] Optionally, the regulating balance wheel is connected to a control cable and a reset spring, the control cable pulls the regulating balance wheel to rotate, and the reset spring provides a reset force for the regulating balance wheel.

[0011] Optionally, a rotating shaft is provided on the air valve fixing plate, an axial hole is correspondingly provided on the air valve pressing balance wheel, the air valve pressing balance wheel is arranged on the rotating shaft for rotation, the rotating shaft is provided with an axial gap, and an anti-slip structure is provided at the end.

[0012] Optionally, a slot is provided at the end of the regulating balance wheel that triggers the air valve to press the balance wheel, and a roller is provided in the slot to contact the air valve to press the balance wheel.

[0013] Optionally, the air valve fixing plate is provided with limiting ribs, the air valve is arranged in the limiting ribs, and is fixed to the air valve fixing plate by screws.

[0014] Another aspect of the present invention provides a seat base, including an airbag and the seat height suspension control mechanism described above, wherein the air valve in the seat height suspension control mechanism is respectively connected to the air source and the airbag through a gas pipeline.

[0015] It can be seen from the above technical solution that the seat height suspension control mechanism provided by the present invention has the following advantages:

[0016] The present invention solves the problem that the seat height suspension control mechanism occupies a large space on the middle connecting shaft of the gallows by arranging various components on the air valve fixing plate and reducing the thickness of the air valve fixing plate and the adjusting balance wheel mounting hole, thereby leaving more installation space for the seat base and making installation simple.

[0017] The present invention drives the regulating balance wheel by controlling the pull wire and the return spring, so that the air path structure is simple and reliable, and the arrangement of more air path components is avoided.

[0018] The present invention can support a suspended height adjustable seat, and can also support a fixed suspended height seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of a seat height suspension control mechanism in an embodiment of the present invention;

[0020] Figure 2 It is a right side view of the seat height suspension control mechanism in the embodiment of the present invention;

[0021] Figure 3 A three-dimensional diagram of a seat height suspension control mechanism in an embodiment of the present invention;

[0022] Figure 4 A three-dimensional diagram of a gas valve fixing plate in an embodiment of the present invention;

[0023] Figure 5 A three-dimensional diagram of an adjusting balance wheel in an embodiment of the present invention;

[0024] Figure 6 A three-dimensional diagram of an adjusting balance wheel in an embodiment of the present invention;

[0025] Figure 7 It is a right side view of the adjusting balance wheel in the embodiment of the present invention;

[0026] Figure 8 A three-dimensional diagram of a roller in an embodiment of the present invention;

[0027] Fig. 9 A three-dimensional diagram of a gas valve pressing a balance wheel in an embodiment of the present invention;

[0028] Fig.10 A three-dimensional diagram of a gas valve in an embodiment of the present invention;

[0029] Fig.11 A three-dimensional diagram of a gas valve in an embodiment of the present invention;

[0030] Fig.12 1 is a diagram showing the use status of the seat height suspension control mechanism in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Valve fixing plate; 1-1. Main body; 1-2. Second mounting hole; 1-3. Rotating shaft; 1-4. Limiting groove; 1-5. First mounting hole; 1-6. Anti-wear ribs; 1-7. Limiting ribs; 1-8. U-shaped groove; 2. Valve; 2-1. Inlet ejector pin; 2-2. Exhaust ejector pin; 2-3. Airbag air circuit exhaust hole; 2-4. Fourth mounting hole; 2-5. Airbag air circuit interface; 2-6. Main air circuit interface; 3. Valve pressing balance wheel; 3-1. Main body; 3-2, touch slot; 3-3, shaft hole; 4, adjusting balance wheel; 4-1, main body; 4-2, third mounting hole; 4-3, spring hook hole; 4-4, control cable mounting slot; 4-5, card slot; 4-6, card hook; 5, roller; 6, screw; 7, control cable; 8, reset spring; 9, fixing part; 10, gallows; 11, upper seat frame; 12, lower seat frame; 13, middle connecting shaft; 14, retaining ring; 15, roller shaft. DETAILED DESCRIPTION

[0033] In order to better understand the purpose, structure and function of the present invention, a seat height suspension control mechanism and a seat base of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0034] Example 1

[0035] like Figure 1 , Figure 2 , Figure 3 The figure shows embodiment 1 of the present invention, which discloses a seat height suspension control mechanism, including an air valve fixing plate 1, an air valve 2, an air valve pressing balance wheel 3 and an adjusting balance wheel 4. When the adjusting balance wheel 4 rotates, the air valve pressing balance wheel 3 is driven to rotate, and the air valve pressing balance wheel 3 triggers the air valve 2 to achieve different ventilation states. The air valve 2, the air valve pressing balance wheel 3 and the adjusting balance wheel 4 are all arranged on the air valve fixing plate 1. The upper end of the air valve fixing plate 1 is hinged to the middle connecting shaft 13 of the seat base, and the lower end is hinged to the roller shaft 15 of the seat base.

[0036] from Figure 2 It can be seen that the thickness of the seat height suspension control mechanism is relatively thin, limited to the sum of the thickness of the air valve fixing plate 1 and the air valve 2, especially the adjusting balance wheel 4 does not increase the total thickness. Fig.12 As shown, the gallows includes two groups of support rods hinged in an X shape, and the air valve fixing plate 1 and the two support rods (external gallows) maintain the same inclination angle. Through the structure of hinged ends, the air valve fixing plate 1 will not hinder the deformation of the gallows. Through the above arrangement, the thickness of the seat height suspension control mechanism can be reduced, the installation space can be reduced, and the installation is also simplified.

[0037] like Figure 4 As shown, the lower end of the air valve fixing plate 1 is provided with a U-shaped groove 1-8, and is supported on the roller shaft 15 through the U-shaped groove 1-8. The U-shaped groove 1-8 has an opening, which is convenient for connecting the air valve fixing plate 1 with the roller shaft 15, and also allows radial activity margin at the connection position to avoid damage to the air valve fixing plate 1 when the gallows is deformed.

[0038] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the upper end of the air valve fixing plate 1 is provided with a first mounting hole 1-5, and the adjusting balance wheel 4 is provided with a third mounting hole 4-2. The first mounting hole 1-5 and the third mounting hole 4-2 are coaxially mounted and sleeved on the middle connecting shaft 13 of the seat base. When the adjusting balance wheel 4 rotates, it also rotates around the middle connecting shaft 13, which can ensure that the adjusting balance wheel 4 and the air valve pressing balance wheel 3 are accurately matched.

[0039] Since the regulating balance wheel 4 and the valve fixing plate 1 have adjacent surfaces, friction with the valve fixing plate 1 is inevitable when the regulating balance wheel 4 rotates. Figure 4 As shown, arc-shaped anti-wear ribs 1-6 are arranged around the first mounting hole 1-5, and the anti-wear ribs 1-6 allow a gap to exist between the adjacent surfaces of the adjusting balance wheel 4 and the valve fixing plate 1. When the adjusting balance wheel 4 rotates, it only rubs against the anti-wear ribs 1-6, so the friction force will be relatively small, effectively avoiding large-area friction with the valve fixing plate 1 to generate large friction force.

[0040] like Figure 4 , Figure 5 , Figure 6 As shown, an arc-shaped limiting groove 1-4 is arranged around the first mounting hole 1-5, and a hook 4-6 is arranged on the adjusting balance wheel 4. The hook 4-6 extends into the limiting groove 1-4, and the hook 4-6 slides in the limiting groove 1-4 when the adjusting balance wheel 4 rotates. The height of the limiting groove 1-4 is less than the hook height of the hook 4-6, which can prevent the adjusting balance wheel 4 from axially separating from the air valve fixing plate 1. In order to facilitate installation, a downward notch is arranged at the end of the limiting groove 1-4, and the hook 4-6 can enter from the notch. After the adjusting balance wheel 4 and the air valve fixing plate 1 are coaxially installed, the hook 4-6 can no longer fall back to the notch, and can no longer detach from the notch.

[0041] In this embodiment, the rotation of the regulating balance wheel 4 is driven by controlling the cable 7. Fig.12 As shown, the regulating balance wheel 4 is in an irregular L-shape, and a control cable 7 and a reset spring 8 are connected to the end of the long arm, and the end is provided with a spring hook hole 4-3 and a control cable installation groove 4-4. The control cable 7 pulls the regulating balance wheel 4 to rotate, and the reset spring 8 provides a reset force for the regulating balance wheel 4. One end of the reset spring 8 hooks the regulating balance wheel 4, and the other end hooks the fixing part 9 on the inner gallows (set on the inner side of the gallows), thereby generating a reset force on the regulating balance wheel 4. The working principle of the control cable 7 is similar to that of the brake cable of a bicycle. The outer end of the control cable 7 can be connected to a control device, which is set at a position that is easy for the driver to operate, and the control cable 7 is tightened or loosened by the control device.

[0042] The structure of the valve pressing balance wheel 3 is as follows Fig. 9 As shown, a V-shaped touch groove 3-2 is provided on the upper part of the body 3-1. In order to install the valve pressing balance wheel 3, as shown in FIG. Figure 4As shown, the air valve fixing plate 1 is provided with a rotating shaft 1-3, and the air valve pressing balance wheel 3 is correspondingly provided with an axial hole 3-3. The air valve pressing balance wheel 3 is arranged on the rotating shaft 1-3 for rotation. The rotating shaft 1-3 is provided with an axial gap, and an anti-slip structure is provided at the end, specifically a radial protrusion. The axial gap allows the end of the rotating shaft 1-3 to shrink, which is convenient for installing the air valve pressing balance wheel 3. During installation, the axial hole 3-3 is aligned with the rotating shaft 1-3 to press the air valve pressing balance wheel 3. After installation, the anti-slip structure can prevent the air valve pressing balance wheel 3 from detaching from the air valve fixing plate 1.

[0043] like Figure 5 , Figure 6 As shown, the end of the regulating balance wheel 4 that triggers the air valve to press the balance wheel 3 (the end of the L-shaped short arm) is provided with a slot 4-5, and a roller 5 is provided in the slot 4-5 to contact the air valve to press the balance wheel 3. The roller 5 can rotate in the slot 4-5, and the structure of the roller 5 is as shown in FIG. Figure 8 As shown, a spherical surface is provided, which can rotate when in contact with the control groove 3-2 of the air valve pressing balance wheel 3, thereby effectively reducing friction.

[0044] To install the gas valve 2, Figure 4 , Fig.10 As shown, the air valve fixing plate 1 is provided with limiting ribs 1-7, the air valve 2 is arranged in the limiting ribs 1-7, and is fixed to the air valve fixing plate 1 by screws 6. Corresponding to the screws 6, the air valve fixing plate 1 is provided with two second mounting holes 1-2, and the air valve 2 is provided with two fourth mounting holes 2-4.

[0045] like Fig.12 As shown, the seat height suspension control mechanism can be fixed by an E-type retaining ring 14, making installation easier. An E-type retaining ring is also provided on the roller shaft 15 to limit the seat height suspension control mechanism in the axial direction.

[0046] The seat height suspension control mechanism of this embodiment has the following advantages:

[0047] By arranging various components on the air valve fixing plate and reducing the thickness of the air valve fixing plate and the adjusting balance wheel mounting hole, the problem of the seat height suspension control mechanism occupying a large space on the middle connecting shaft of the gallows is solved, leaving more installation space for the seat base and making installation simple.

[0048] By controlling the pull wire and the return spring to drive the regulating balance wheel, the gas circuit structure is simple and reliable, and the arrangement of more gas circuit components is avoided.

[0049] It can support suspended height adjustable seats and fixed suspension height seats.

[0050] Example 2

[0051] This embodiment discloses a seat base, including an airbag and the seat height suspension control mechanism described in Embodiment 1. The air valve 2 in the seat height suspension control mechanism is connected to the air source and the airbag respectively through gas pipelines.

[0052] The air source is a high-pressure air source. When the air enters the airbag through the air valve 2, it can push the upper seat frame 11 upward to raise the height of the seat. The cushion and backrest of the car seat are installed on the upper seat frame 11. The air valve 2 adopts a two-position three-way air valve, with an airbag air circuit interface 2-5 and a main air circuit interface 2-6 at the bottom, and an airbag air circuit exhaust hole 2-3 at the side. The main air circuit interface 2-6 is connected to the air source through a gas pipeline, and the airbag air circuit interface 2-5 is connected to the airbag through a gas pipeline. The airbag air circuit exhaust hole 2-3 can exhaust to the atmosphere. When the airbag is exhausted, the gas is discharged from the airbag air circuit exhaust hole 2-3.

[0053] An intake pin 2-1 and an exhaust pin 2-2 are arranged on the top of the air valve 2, which are two valve stems of the air valve 2. The lower part of the air valve pressing balance wheel 3 is V-shaped. When the air valve pressing balance wheel 3 rotates left and right, the intake pin 2-1 and the exhaust pin 2-2 can be pressed respectively to realize the inflation and exhaust of the airbag.

[0054] The working mode of the seat height suspension control mechanism is divided into two states: height adjustment state and working suspension state.

[0055] Height adjustment status:

[0056] refer to Fig.12 As shown, when the control cable 7 is extended a certain distance, the adjusting balance wheel rotates clockwise and stops under the tension of the control cable 7 and the reset spring 8. Under the action of the adjusting balance wheel, the roller applies pressure to the lower end of the air valve pressing balance wheel, forcing it to rotate counterclockwise around the mounting axis, pushing the air intake ejector of the two-position three-way air valve to inflate the airbag. After the airbag is inflated, the gallows 10 is lifted upward, and the seat height rises accordingly. During the rising process of the gallows 10, the angle between the inner and outer gallows increases, driving the adjusting balance wheel assembly and the air valve pressing balance wheel back to the initial non-contact force state, and the adjustment is completed.

[0057] On the contrary, after the control cable 7 contracts a certain distance, the regulating balance wheel rotates counterclockwise and stops under the tension of the control cable 7 and the reset spring 8. Under the action of the regulating balance wheel, the roller applies pressure to the upper end of the air valve pressing the balance wheel, forcing it to rotate clockwise around the mounting axis, pushing the exhaust ejector pin of the two-position three-way air valve to exhaust the airbag. After the airbag is exhausted, the gallows drops downward, and the seat height drops accordingly. During the process of the gallows descending, the angle between the inner and outer gallows decreases, driving the regulating balance wheel assembly and the air valve pressing the balance wheel back to the initial non-contact force state, and the adjustment is completed.

[0058] Working suspension state:

[0059] refer to Fig.12 As shown, in the suspended state, the regulating balance wheel is always consistent with the angle change of the inner gallows under the tension of the control cable 7 and the return spring 8. The valve fixing plate, the two-position three-way valve, and the valve pressing balance wheel are always consistent with the angle change of the outer gallows (set on the outside of the gallows).

[0060] When the seat height drops under the action of external force, the angle between the inner and outer gallows decreases. Under the action of the adjusting balance wheel, the roller applies pressure to the lower end of the air valve pressing the balance wheel, forcing it to rotate counterclockwise around the installation axis, pushing the air intake ejector of the two-position three-way air valve to inflate the airbag. After the airbag is inflated, the gallows is lifted upward, and the seat height rises accordingly. During the process of the gallows rising, the angle between the inner and outer gallows increases, driving the adjusting balance wheel and the air valve pressing the balance wheel back to the initial non-contact force state, and then returning to the suspended position.

[0061] On the contrary, when the seat height rises under the action of external force, the angle of the inner and outer gallows increases, and the roller exerts pressure on the upper end of the air valve pressing the balance wheel under the action of the adjusting balance wheel, forcing it to rotate clockwise around the installation axis, pushing the exhaust ejector of the two-position three-way air valve to exhaust the airbag. After the airbag is exhausted, the gallows drops downward, and the seat height drops accordingly. During the process of the gallows descending, the angle between the inner and outer gallows decreases, driving the adjusting balance wheel assembly and the air valve pressing the balance wheel back to the initial non-contact force state, and then returns to the suspended position.

[0062] It should be noted that, in another embodiment, when the seat does not need a height adjustment function and only requires a seat suspension function, it is only necessary to cancel the return spring and the control cable, and use a fixing mechanism to fix the adjusting balance wheel and the inner gallows at a relative angle at the selected suspension height.

[0063] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0064] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A seat height suspension control mechanism, characterized in that: It includes an air valve fixing plate, an air valve, an air valve pressing balance wheel and an adjusting balance wheel. When the adjusting balance wheel rotates, the air valve pressing balance wheel is driven to rotate. The air valve pressing balance wheel triggers the air valve to realize different ventilation states. The air valve, the air valve pressing balance wheel and the adjusting balance wheel are all arranged on the air valve fixing plate. The upper end of the air valve fixing plate is hinged to the middle connecting shaft of the seat base, and the lower end is hinged to the roller shaft of the seat base. The adjusting balance wheel is connected to a control cable and a reset spring, the control cable pulls the adjusting balance wheel to rotate, and the reset spring provides a reset force for the adjusting balance wheel; the end of the adjusting balance wheel that triggers the air valve to press the balance wheel is provided with a slot, and a roller is provided in the slot to contact the air valve to press the balance wheel.

2. The seat height suspension control mechanism according to claim 1, characterized in that: The lower end of the air valve fixing plate is provided with a U-shaped groove, and is supported on the roller shaft through the U-shaped groove.

3. The seat height suspension control mechanism according to claim 1, characterized in that: A first mounting hole is arranged at the upper end of the air valve fixing plate, a third mounting hole is arranged on the adjusting balance wheel, the first mounting hole and the third mounting hole are coaxially mounted and sleeved on the middle connecting shaft of the seat base.

4. The seat height suspension control mechanism according to claim 3, characterized in that: Arc-shaped anti-wear ribs are arranged around the periphery of the first mounting hole, and the anti-wear ribs allow a gap to exist between adjacent surfaces of the regulating balance wheel and the air valve fixing plate.

5. The seat height suspension control mechanism according to claim 3, characterized in that: An arc-shaped limiting groove is arranged around the first mounting hole, and a hook is arranged on the adjusting balance wheel. The hook extends into the limiting groove, and the hook slides in the limiting groove when the adjusting balance wheel rotates.

6. The seat height suspension control mechanism according to claim 1, characterized in that: The air valve fixing plate is provided with a rotating shaft, the air valve pressing balance wheel is correspondingly provided with an axial hole, the air valve pressing balance wheel is arranged on the rotating shaft for rotation, the rotating shaft is provided with an axial gap, and an anti-slip structure is provided at the end.

7. The seat height suspension control mechanism according to claim 1, characterized in that: The air valve fixing plate is provided with limiting ribs, the air valve is arranged in the limiting ribs, and is fixed to the air valve fixing plate by screws.

8. A seat base, comprising an airbag, characterized in that: It also includes the seat height suspension control mechanism according to any one of claims 1 to 7, wherein the air valve in the seat height suspension control mechanism is respectively connected to the air source and the air bag through a gas pipeline.

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