WO2020034551A1

WO2020034551A1 - Self-locking synchronized multi-stage gas spring

Info

Publication number: WO2020034551A1
Application number: PCT/CN2018/124864
Authority: WO
Inventors: 岳彩立; 岳坤
Original assignee: 江苏睿博工业科技有限公司
Priority date: 2018-08-14
Filing date: 2018-12-28
Publication date: 2020-02-20
Also published as: CN108869618A

Abstract

A self-locking synchronized multi-stage gas spring. Piston rods of multiple stages are designed to be combined into an integrated structure having multiple sections operating synchronously, wherein a first-stage piston rod (1) serves as a cylinder for a second-stage piston rod (2), the second-stage piston rod (2) serves as a cylinder for a third-stage piston rod, and so on. When compressed, the piston rods at each stage can all be compressed and contained in a first-stage cylinder (9), such that the length of the whole cylinder is shortened and the stroke length is increased, thereby remedying the technical defect of the present product in the art in which a stroke is shorter than the length of the cylinder.

Description

Multi-stage synchronous self-locking gas spring

Technical field

The utility model relates to the field of gas springs, in particular to a multi-stage synchronous self-locking gas spring.

Background technique

Gas springs are widely used in the fields of aviation, automotive, medical equipment, furniture, manufacturing, industrial automation and control. At present, the self-locking gas springs available in the market are structurally because the piston seals inside the cylinder barrel occupy the position inside the cylinder barrel, so the stroke will not exceed the length of the cylinder barrel, resulting in waste of its structure.

Utility model content

In order to solve the above technical problems, the present invention provides a multi-stage synchronous self-locking gas spring. Realize the large ratio and oversized ratio of the minimum center distance and the maximum center distance of the gas spring, so that the stroke length is longer than the length of the cylinder barrel, which meets the use of specific conditions and special environments.

The technical scheme adopted by the utility model is: a multi-stage synchronous self-locking gas spring, including a starter rod, a secondary piston rod, a primary piston rod, a secondary guide sleeve, a secondary straight skeleton oil seal, a secondary isolation sleeve, and a secondary First-stage piston, second-stage needle valve, first-stage cylinder, first-stage guide sleeve, first-stage straight oil seal, first-stage isolation sleeve, first-stage piston, first-stage needle valve and tail connecting piece; the first-stage piston rod is fixedly connected There is a first-stage piston, a first-stage isolation sleeve, a first-straight frame oil seal and a first-stage guide sleeve are arranged in order from the inside to the first-stage piston rod; the first-stage piston rod is a hollow rod body and a first-stage needle valve. It extends through the center of the primary piston into the primary piston rod, and a sealing ring is provided at the contact point of the primary needle valve with the primary piston and the primary piston rod; the secondary piston is installed in the primary piston rod A rod, which is a cylinder of a secondary piston rod, a secondary isolation sleeve, a secondary straight skeleton oil seal, and a secondary guide sleeve are arranged in order from the inside to the outside between the secondary piston rod and the inner wall of the primary piston rod; the secondary piston The rod is a hollow rod body, the inner end is fixedly connected to the secondary piston, and the outer end extends to The starting rod is installed on the outside of the secondary piston rod. The secondary needle valve passes through the center of the secondary piston and extends into the secondary piston rod. The sealing ring is provided at the contact point between the secondary needle valve and the secondary piston and the secondary piston rod. ; A seal ring is provided at the contact between the secondary piston and the inner wall of the primary piston rod.

A tail connector is fixedly connected to the tail of the primary cylinder.

The ports of the first-stage cylinder and the first-stage piston rod are set to close.

The piston rod can be set into multiple stages according to requirements. Each stage of the piston rod can be used as the cylinder of the next stage of the piston rod, and can finally be retracted into the cylinder of the first stage.

The piston rod is arranged in 2 to 5 stages.

The beneficial effect of the utility model is: a multi-stage synchronous self-locking gas spring, which is combined into a multi-integrated multi-section synchronous structure through the design of a multi-stage piston rod, and the first-stage piston rod is used as the cylinder barrel of the second-stage piston rod. The piston rod is used as the cylinder of the three-stage piston rod, and so on. During the compression process, the piston rods of all levels can be compressed into the first-stage cylinder, thereby compressing the length of the cylinder and increasing the distance of the stroke. The technical disadvantage of this area is that the stroke is smaller than the cylinder length.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of a multi-stage synchronous self-locking gas spring.

In the figure, 1. starter rod, 2. secondary piston rod, 3. primary piston rod, 4. secondary guide sleeve, 5. secondary straight skeleton oil seal, 6. secondary isolation sleeve, 7. secondary piston, 8. Two-stage needle valve, 9. One-stage cylinder, 10. One-stage guide sleeve, 11. One-stage straight skeleton oil seal, 12. One-stage isolation sleeve, 13. One-stage piston, 14. One-stage needle valve, 15 .Tail connector.

detailed description

As shown in FIG. 1, a multi-stage synchronous self-locking gas spring includes a starter rod 1, a secondary piston rod 2, a primary piston rod 3, a secondary guide sleeve 4, a secondary straight skeleton oil seal 5, and a secondary isolation sleeve. 6, two-stage piston 7, two-stage needle valve 8, first-stage cylinder barrel 9, first-stage guide sleeve 10, first-straight frame oil seal 11, first-stage isolation sleeve 12, first-stage piston 13, first-stage needle valve 14 and tail Connecting member 15; the first-stage piston rod 3 is fixedly connected with a first-stage piston 13, and a first-stage isolation sleeve 12, a first-straight skeleton oil seal 11 and Stage guide sleeve 10; the first-stage piston rod 3 is a hollow rod body, a first-stage needle valve 14 extends through the center of the first-stage piston 13 into the first-stage piston rod 3, and the first-stage needle valve 14 and the first-stage piston 13 And the first piston rod 3 is provided with a sealing ring; the second piston rod 3 is installed with a second piston rod 2 as a cylinder of the second piston rod 2, the second piston rod 2 and the first piston rod; A secondary isolation sleeve 6, a secondary straight skeleton oil seal 5 and a secondary guide sleeve 4 are arranged in order from the inside to the inside of the 3; the secondary piston rod 2 is a hollow rod body, and the inner end and the secondary live 7 is fixed, the outer end protrudes to the outside of the primary piston rod 3 and the starting rod 1 is installed; the secondary needle valve 8 extends through the center of the secondary piston 7 into the secondary piston rod 2, and the secondary needle valve A sealing ring is provided at the contact point between the secondary piston 7 and the secondary piston rod 2; a sealing ring is provided at the contact point between the secondary piston 7 and the inner wall of the primary piston rod 3.

A tail connector 15 is fixed to the tail of the primary cylinder 9.

The ports of the first-stage cylinder 9 and the first-stage piston rod 3 are set to close.

The piston rod can be set in multiple stages according to requirements. Each stage of the piston rod can be used as the cylinder of the next stage of the piston rod, and can finally be retracted into the first cylinder 9.

The piston rod is arranged in 2 to 5 stages.

The design principle of the utility model is: in order to meet the stroke of a large ratio or a large ratio, and on the premise of satisfying the extension center distance, the length of the cylinder is reduced as much as possible so that the extension length is far greater than the compression length. According to this principle, The designer sets a multi-stage piston rod, and the piston rod is used as the cylinder of the next-stage piston rod. The multi-stage piston rod is retracted into the first-stage cylinder, thereby compressing the cylinder length to meet a large ratio or a large ratio. Numerical value, to solve the technical structure requirements of large strokes or large strokes.

Examples

Multi-stage synchronous self-locking gas spring. The diameter of the first-stage cylinder 9 is 28cm, the wall thickness is 1.5cm, and the length is 200cm. The length of the first-stage piston 13 + seal length = 35cm, and its maximum stroke = 200-35 = 165cm. The diameter of the piston rod 3 is 15cm, the wall thickness is 1cm, and the length is 200cm. The length of the secondary piston 7 is dense + seal length = 24cm, the maximum stroke is 200-24 = 176cm, and the two-stage stroke is 165 + 176 = 341cm. It can be inferred that the multi-stage stroke should be the sum of the strokes of all levels. The implementation scheme is that the starting rod 1 is compressed by the external force, pushes the secondary needle valve 8 to the right, opens the damping hole, and the secondary piston 7 moves to the right under the external force. Due to the damping effect, the cavity pressure on the right side of the piston 7 increases, and the first-stage piston 13 is added to the left end of the first-stage needle valve 14, thereby compressing the right-hand row of the needle valve 14 and opening a first-stage damping passage. The primary piston 13 and the secondary piston 7 are moved to the right simultaneously. When the external force on the starting lever 1 is withdrawn, the secondary needle valve 8 is reset, the secondary piston 7 is stopped, the primary needle valve 14 is closed, and the primary piston 13 is stopped, thereby achieving the purpose of multi-stage synchronous self-locking. During the implementation, it is necessary to tightly seal the inside and outside of the sealing system at all levels without leakage.

Claims

A multi-stage synchronous self-locking gas spring, characterized in that it includes a starter rod, a secondary piston rod, a primary piston rod, a secondary guide sleeve, a secondary straight skeleton oil seal, a secondary isolation sleeve, a secondary piston, and a secondary Needle valve, primary cylinder, primary guide sleeve, primary straight skeleton oil seal, primary isolation sleeve, primary piston, primary needle valve and tail connecting piece; the primary piston rod is fixedly connected with primary piston, one A first-level isolation sleeve, a first-level straight oil seal and a first-level guide sleeve are sequentially arranged from the inside to the outside between the first-stage piston rod and the first-stage cylinder. The first-stage piston rod is a hollow rod body, and the first-stage needle valve passes through the first-stage piston. The center of the piston extends into the primary piston rod, and a sealing ring is provided at the contact point of the primary needle valve with the primary piston and the primary piston rod. The secondary piston rod is installed in the primary piston rod as a secondary rod. The cylinder barrel of the piston rod, the secondary piston rod and the inner wall of the primary piston rod are provided with a secondary isolation sleeve, a secondary straight skeleton oil seal, and a secondary guide sleeve in order from the inside to the outside; the secondary piston rod is a hollow rod body, The inner end is fixedly connected to the secondary piston, and the outer end protrudes to the outside of the primary piston rod. A starter rod is installed; the secondary needle valve extends through the center of the secondary piston into the secondary piston rod, and a sealing ring is provided at the contact point between the secondary needle valve and the secondary piston and the secondary piston rod; A sealing ring is arranged at the contact position of the inner wall of the piston rod.
The multi-stage synchronous self-locking gas spring according to claim 1, wherein a tail connector is fixedly connected to the tail of the first-stage cylinder tube.
The multi-stage synchronous self-locking gas spring according to claim 1, characterized in that the ports of the first-stage cylinder and the first-stage piston rod are both closed.
The multi-stage synchronous self-locking gas spring according to claim 1, characterized in that the piston rod can be set into multiple stages according to requirements, and each stage of the piston rod is used as a cylinder of the piston rod of the next stage, and finally Capable of being shrunk into the primary cylinder.
The multi-stage synchronous self-locking gas spring according to claim 4, wherein the piston rod is arranged in 2 to 5 stages.
The method for using a self-locking gas spring according to any one of claims 1 to 5, wherein the actuating lever is compressed by an external force, pushing the secondary needle valve to the right, opening the damping hole, and the secondary piston receiving external force. On the right, due to the damping effect, the cavity pressure on the right side of the piston increases; because a first-stage piston is added to the left end of the first-stage needle valve, the right-hand side of the needle valve is compressed, a first-stage damping passage is opened, and the first-stage piston and the second-stage piston are opened. Synchronous right; when the external force on the starting lever is withdrawn, the secondary needle valve is reset, the secondary piston is stopped, the primary needle valve is closed, and the primary piston is stopped to achieve the purpose of multi-stage synchronous self-locking.