Positioning type pneumatic rod

Abstract

The utility model relates to the technical field of seat pneumatic rods, in particular to a positioning type pneumatic rod which comprises an outer cylinder, an inner cylinder is fixedly connected in the outer cylinder, a connecting rod is slidably installed in the inner cylinder, a piston is fixedly installed on the top of the connecting rod, and a control valve is installed on the top of the outer cylinder and the top of the inner cylinder. A clamping assembly is installed at the bottom of the outer cylinder, and a driving assembly is installed on the outer wall of the outer cylinder. The control valve comprises two round holes, a valve element and an open groove, the two round holes are sequentially formed in the top of the outer cylinder and the top of the inner cylinder, the valve element is movably installed in the two round holes, and the open groove is formed in the outer wall of the valve element and located between the outer cylinder and the inner cylinder. According to the utility model, the control valve is arranged to accurately control the gas flow so as to realize accurate height adjustment, the clamping assembly is arranged to lock the position immediately so as to guarantee stability, and the driving assembly is arranged to synchronously control the valve and the clamping assembly so as to improve the operation convenience.

Description

Technical Field

[0001] The utility model relates to the technical field of seat pneumatic rods, in particular to a positioning pneumatic rod. Background Art

[0002] With the continuous development of society, people's requirements for the comfort and functionality of various products are increasing. In the field of seats, positioning pneumatic rods play an extremely critical role. As the core component of seat height adjustment, positioning pneumatic rods can allow users to flexibly adjust the seat height according to their own needs, thereby adapting to different usage scenarios. It not only improves the convenience of seat use, but also has an important impact on the sitting health of the human body. Reasonable seat height helps to reduce pressure on various parts of the body and improve the comfort of long-term sitting.

[0003] Existing positioning pneumatic rods usually control the seat position by controlling the valve. However, this control method has certain defects. In actual use, when the valve is operated to adjust the seat position, due to the limitations of valve control, the seat will still produce a certain displacement. This means that when the seat position needs to be locked quickly, it cannot be achieved in the first time, which may cause inconvenience to the user and affect the overall stability and reliability of the seat. Summary of the Invention

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a positioning pneumatic rod.

[0005] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a positioning type pneumatic rod, comprising an outer cylinder, the interior of the outer cylinder is fixedly connected to the inner cylinder, a connecting rod is slidably installed in the interior of the inner cylinder, a piston is fixedly installed on the top of the connecting rod, control valves are installed on the top of the outer cylinder and the inner cylinder, a clamping assembly is installed on the bottom of the outer cylinder, and a driving assembly is installed on the outer wall of the outer cylinder;

[0006] The control valve includes a circular hole, a valve core and a slot. Two circular holes are sequentially opened at the top of the outer cylinder and the inner cylinder. The valve core is movably installed inside the two circular holes. The slot is opened on the outer wall of the valve core and is located between the outer cylinder and the inner cylinder.

[0007] Further: the control valve also includes a support ring and a first spring, the support ring is fixedly connected to the outer wall of the valve core, the support ring is located at the top of the outer tube, and the first spring is fixedly connected between the outer tube and the support ring.

[0008] Further: the clamping assembly includes a protective cover, a moving block, a clamping block, a moving ring, a limit rod, an oblique groove, a transverse limit block and a transverse groove. The protective cover is fixedly connected to the bottom of the outer cylinder, the moving block has four annular blocks located inside the protective cover, the clamping block is fixedly connected to the inner wall of the moving block, the moving ring is located at the bottom of the protective cover, the limit rod has four annular blocks fixedly connected to the top of the moving ring, the oblique groove is opened inside the moving block, the limit rod is located inside the oblique groove, the transverse limit block has four fixed connections to the inner wall of the protective cover, a transverse groove is opened on the top of the moving block, and the transverse limit block is located inside the transverse groove.

[0009] Furthermore: a second spring is fixedly connected to the interior of the protective cover, and the second spring is located between the protective cover and the moving block.

[0010] Further: the driving assembly includes a first connecting rod, a second connecting rod, a gear, a rack and a pull rod, the first connecting rod has two fixed connections at the two ends of the outer wall of the movable ring, the second connecting rod has two fixed connections at the two ends of the outer wall of the valve core, the gears have two movably installed on both sides of the outer wall of the outer cylinder in sequence, the racks have two groups installed in sequence on the top of the two first connecting rods and the bottom of the two second connecting rods, the two racks are meshed with the gears, and the pull rod is fixedly connected to the outer walls of the two gears.

[0011] Furthermore: the outer wall of the outer cylinder is fixedly connected to a limiting sleeve, and the first connecting rod and the second connecting rod are both located inside the limiting sleeve.

[0012] Furthermore: the outer wall of the piston is fixedly connected with a sealing ring, there are two sealing rings, and the sealing rings are in contact with the inner wall of the inner cylinder.

[0013] The utility model has the following beneficial effects:

[0014] Compared to the prior art, the present invention comprises an outer cylinder, an inner cylinder, a piston, a circular hole, a valve core, a slot, and a drive assembly. The drive assembly applies force to the valve core, causing it to move within the circular hole, thereby changing the relative position of the slot, the outer cylinder, and the inner cylinder. This in turn opens the gap between the outer and inner cylinders. When a person sits on the chair, their weight causes high-pressure gas in the inner cylinder to be discharged into the outer cylinder, pushing the piston upward to adjust the seat height. This new design allows seat height to be controlled by air pressure, significantly improving the accuracy and stability of seat height adjustment.

[0015] Compared to the prior art, the present invention comprises a connecting rod, a piston, a movable block, a clamping block, a movable ring, a limiting rod, an oblique groove, a transverse limiting block, a transverse groove, a second spring, and a drive assembly. Initially, the movable block is in an open position under the action of the second spring, and the clamping block contacts the connecting rod, securing the clamping block. When the drive assembly drives the movable ring upward, the limiting rod slides along the oblique groove. Due to the special shape of the oblique groove, the movable block moves outward within the constraints of the transverse limiting block and transverse groove. Releasing the connecting rod allows the piston to move, thereby adjusting the height. This utility model can instantly lock the seat position, effectively enhancing the immediate stability of the seat and avoiding unnecessary displacement.

[0016] Compared to existing technologies, the new system utilizes a control valve, a valve core, a movable ring, a first connecting rod, a second connecting rod, a gear, a rack, and a pull rod. When the pull rod is pulled, the gear rotates, driving the two meshing racks, causing the first and second connecting rods to move in opposite directions. The second connecting rod then drives the valve core, which in turn drives the movable ring, thereby opening the control valve and clamping assembly. This new system allows for the coordinated operation of seat height adjustment and position locking simply by operating the pull rod, significantly improving operational convenience and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the utility model from a first perspective;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model from a second perspective;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 4 for Figure 3 A in the middle is an enlarged structural diagram;

[0021] Figure 5 for Figure 3 The enlarged structural diagram at B in the middle;

[0022] Figure 6 for Figure 3 Enlarged structural diagram at point C in the middle.

[0023] Legend:

[0024] 1. Outer cylinder; 101. Limit sleeve; 2. Inner cylinder; 3. Connecting rod; 4. Piston; 401. Sealing ring; 5. Control valve; 501. Round hole; 502. Valve core; 503. Slot; 504. Support ring; 505. First spring; 6. Clamping assembly; 601. Protective cover; 602. Moving block; 603. Clamping block; 604. Moving ring; 605. Limit rod; 606. Inclined groove; 607. Horizontal limit block; 608. Horizontal groove; 609. Second spring; 7. Driving assembly; 701. First connecting rod; 702. Second connecting rod; 703. Gear; 704. Rack; 705. Pull rod. DETAILED DESCRIPTION

[0025] Reference Figure 1-6 The utility model provides a positioning pneumatic rod: it includes an outer cylinder 1, the inner cylinder 2 is fixedly connected to the interior of the outer cylinder 1, a connecting rod 3 is slidably installed in the interior of the inner cylinder 2, a piston 4 is fixedly installed on the top of the connecting rod 3, a control valve 5 is installed on the top of the outer cylinder 1 and the inner cylinder 2, a clamping assembly 6 is installed at the bottom of the outer cylinder 1, and a driving assembly 7 is installed on the outer wall of the outer cylinder 1; the control valve 5 includes a circular hole 501, a valve core 502 and a slot 503, two circular holes 501 are sequentially opened at the top of the outer cylinder 1 and the inner cylinder 2, the valve core 502 is movably installed in the two circular holes 501, the slot 503 is opened on the outer wall of the valve core 502, and the slot 503 is located between the outer cylinder 1 and the inner cylinder 2.

[0026] First, install the outer tube 1 on the seat base, and then install the connecting rod 3 on the seat. When the seat height needs to be adjusted, the driving component 7 applies a force to the valve core 502 to move the valve core 502 in the circular hole 501, thereby changing the relative position relationship between the slot 503 and the outer tube 1 and the inner tube 2, and then opening the gap between the outer tube 1 and the inner tube 2. At this time, when a person sits on the chair and under the action of his weight, the high-pressure gas in the inner tube 2 is discharged into the interior of the outer tube 1, pushing the piston 4 to move upward, thereby adjusting the seat height; when it is necessary to raise the seat, the control valve 5 is also opened, and then the person leaves the seat. At this time, the gas in the outer tube 1 enters the inner tube 2, which can push the piston 4 downward, thereby achieving the effect of raising the seat; at the same time, when the driving component 7 is opened, the clamping component 6 is closed and the connecting rod 3 is no longer clamped, thereby facilitating the movement of the piston 4.

[0027] The control valve 5 further includes a support ring 504 and a first spring 505 . The support ring 504 is fixedly connected to the outer wall of the valve core 502 . The support ring 504 is located at the top of the outer tube 1 . The first spring 505 is fixedly connected between the outer tube 1 and the support ring 504 .

[0028] When the drive assembly 7 is closed, the first spring 505 pushes the valve core 502 upward by its own elastic restoring force, so that the slot 503 returns to its initial position or closes the corresponding channel, thereby stopping the flow of gas and maintaining the current height of the seat.

[0029] The clamping assembly 6 includes a protective cover 601, a moving block 602, a clamping block 603, a moving ring 604, a limiting rod 605, an inclined groove 606, a transverse limiting block 607 and a transverse groove 608. The protective cover 601 is fixedly connected to the bottom of the outer cylinder 1. The moving block 602 has four annular portions located inside the protective cover 601. The clamping block 603 is fixedly connected to the inner wall of the moving block 602. The moving ring 604 is located at the bottom of the protective cover 601. The limiting rod 605 has four annular portions fixedly connected to the top of the moving ring 604. The inclined groove 606 is opened inside the moving block 602. The limiting rod 605 is located inside the inclined groove 606. The transverse limiting block 607 has four fixed connections to the inner wall of the protective cover 601. A transverse groove 608 is opened on the top of the moving block 602, and the transverse limiting block 607 is located inside the transverse groove 608.

[0030] In the initial state, the moving block 602 is in an open state under the action of the second spring 609, and the clamping block 603 contacts the connecting rod 3, clamping the clamping block 603. When the driving component 7 drives the moving ring 604 to move upward, the limiting rod 605 slides along the inclined groove 606. Due to the special shape of the inclined groove 606, the moving block 602 will move outward under the restriction of the lateral limiting block 607 and the transverse groove 608, loosening the connecting rod 3 and opening the control valve 5 at the same time, allowing the piston 4 to move, thereby adjusting the height.

[0031] A second spring 609 is fixedly connected to the interior of the protective cover 601 , and the second spring 609 is located between the protective cover 601 and the moving block 602 .

[0032] The second spring 609 always applies an outward elastic force to the moving block 602 , and when no external force acts on the moving ring 604 , the moving block 602 is kept in a clamped state to prevent the connecting rod 3 from moving.

[0033] The driving assembly 7 includes a first connecting rod 701, a second connecting rod 702, a gear 703, a rack 704 and a pull rod 705. The first connecting rod 701 has two fixed connections at both ends of the outer wall of the movable ring 604, the second connecting rod 702 has two fixed connections at both ends of the outer wall of the valve core 502, the gear 703 has two movably installed on both sides of the outer wall of the outer cylinder 1 in sequence, the rack 704 has two groups installed in sequence on the top of the two first connecting rods 701 and the bottom of the two second connecting rods 702, the two racks 704 are engaged with the gear 703, and the pull rod 705 is fixedly connected to the outer walls of the two gears 703.

[0034] When the pull rod 705 is pulled, the pull rod 705 drives the gear 703 to rotate. Since the gear 703 is engaged with the two sets of racks 704, the first connecting rod 701 and the second connecting rod 702 will move in opposite directions at the same time. The movement of the first connecting rod 701 drives the moving ring 604 to move, thereby controlling the closing and clamping action of the clamping assembly 6; the movement of the second connecting rod 702 drives the valve core 502 to move, thereby controlling the opening and closing of the control valve 5, thereby realizing synchronous control of the control valve 5 and the clamping assembly 6.

[0035] The outer wall of the outer cylinder 1 is fixedly connected to the limiting sleeve 101 , and the first connecting rod 701 and the second connecting rod 702 are both located inside the limiting sleeve 101 .

[0036] The limiting sleeve 101 guides and limits the movement of the first connecting rod 701 and the second connecting rod 702 to ensure that they move within a specified path.

[0037] The outer wall of the piston 4 is fixedly connected with a sealing ring 401 . There are two sealing rings 401 . The sealing rings 401 fit in contact with the inner wall of the inner cylinder 2 .

[0038] The sealing ring 401 can effectively prevent the high-pressure gas in the inner tube 2 from leaking from the gap between the piston 4 and the inner tube 2, thereby ensuring the stability of the gas pressure and enabling the seat height adjustment process to proceed smoothly.

[0039] Working principle: First, install the outer cylinder 1 on the seat base, and then install the connecting rod 3 on the seat. Initially, the piston 4 is located at the bottom of the inner cylinder 2, the clamping assembly 6 is in the clamping state, and the control valve 5 is closed.

[0040] When the user pulls the pull rod 705 , the gear 703 rotates and drives the two sets of racks 704 meshing therewith to move, causing the first connecting rod 701 and the second connecting rod 702 to move in opposite directions.

[0041] The second connecting rod 702 drives the valve core 502 to move downward, overcoming the elastic force of the first spring 505. The slot 503 opens the passage between the outer tube 1 and the inner tube 2. Under the action of the user's weight, the high-pressure gas in the inner tube 2 flows into the outer tube 1, pushing the piston 4 upward, thereby lowering the seat.

[0042] At the same time, the first connecting rod 701 drives the moving ring 604 to move, and the cooperation between the limiting rod 605 and the inclined groove 606 causes the moving block 602 to drive the clamping block 603 to open, loosening the connecting rod 3 to facilitate the movement of the piston 4.

[0043] When the appropriate height is reached, the pull rod 705 is released, and the first spring 505 pushes the valve core 502 upward to close the channel. At the same time, the second spring 609 pushes the moving block 602 to drive the clamping block 603 to clamp the connecting rod 3, locking the seat position.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A positioning pneumatic rod, comprising an outer cylinder (1), characterized in that: The inner cylinder (2) is fixedly connected to the inner cylinder (1), a connecting rod (3) is slidably mounted inside the inner cylinder (2), a piston (4) is fixedly mounted on the top of the connecting rod (3), a control valve (5) is mounted on the top of the outer cylinder (1) and the inner cylinder (2), a clamping assembly (6) is mounted on the bottom of the outer cylinder (1), and a driving assembly (7) is mounted on the outer wall of the outer cylinder (1); The control valve (5) comprises a circular hole (501), a valve core (502) and a slot (503), wherein two circular holes (501) are sequentially opened at the top of the outer cylinder (1) and the inner cylinder (2), and the valve core (502) is movably installed inside the two circular holes (501). The slot (503) is opened on the outer wall of the valve core (502), and the slot (503) is located between the outer cylinder (1) and the inner cylinder (2).

2. A positioning pneumatic rod according to claim 1, characterized in that: The control valve (5) further comprises a support ring (504) and a first spring (505), wherein the support ring (504) is fixedly connected to the outer wall of the valve core (502), the support ring (504) is located at the top of the outer cylinder (1), and the first spring (505) is fixedly connected between the outer cylinder (1) and the support ring (504).

3. A positioning pneumatic rod according to claim 1, characterized in that: The clamping assembly (6) comprises a protective cover (601), a moving block (602), a clamping block (603), a moving ring (604), a limiting rod (605), an inclined groove (606), a transverse limiting block (607) and a transverse groove (608), wherein the protective cover (601) is fixedly connected to the bottom of the outer cylinder (1), the moving block (602) has four annular rings located inside the protective cover (601), the clamping block (603) is fixedly connected to the inner wall of the moving block (602), and the moving ring (604) Located at the bottom of the protective cover (601), the limiting rod (605) has four annular portions fixedly connected to the top of the moving ring (604), the inclined groove (606) is opened inside the moving block (602), the limiting rod (605) is located inside the inclined groove (606), the transverse limiting block (607) has four portions fixedly connected to the inner wall of the protective cover (601), the top of the moving block (602) is provided with a transverse groove (608), and the transverse limiting block (607) is located inside the transverse groove (608).

4. A positioning pneumatic rod according to claim 3, characterized in that: A second spring (609) is fixedly connected to the interior of the protective cover (601), and the second spring (609) is located between the protective cover (601) and the moving block (602).

5. The positioning pneumatic rod according to claim 3, characterized in that: The driving assembly (7) includes a first connecting rod (701), a second connecting rod (702), a gear (703), a rack (704) and a pull rod (705), wherein the first connecting rod (701) has two fixed connections to the two ends of the outer wall of the movable ring (604), the second connecting rod (702) has two fixed connections to the two ends of the outer wall of the valve core (502), the gear (703) has two movably mounted on both sides of the outer wall of the outer cylinder (1), the rack (704) has two groups mounted on the tops of the two first connecting rods (701) and the bottoms of the two second connecting rods (702), the two racks (704) are meshed with the gear (703), and the pull rod (705) is fixedly connected to the outer walls of the two gears (703).

6. A positioning pneumatic rod according to claim 5, characterized in that: The outer wall of the outer cylinder (1) is fixedly connected to a limiting sleeve (101), and the first connecting rod (701) and the second connecting rod (702) are both located inside the limiting sleeve (101).

7. The positioning pneumatic rod according to claim 1, characterized in that: The outer wall of the piston (4) is fixedly connected with a sealing ring (401), there are two sealing rings (401), and the sealing rings (401) are in contact with the inner wall of the inner cylinder (2).

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