CN210623463U

CN210623463U - Novel retarding piston for air spring

Info

Publication number: CN210623463U
Application number: CN201921725237.0U
Authority: CN
Inventors: 吴文禄
Original assignee: Ningbo Yuguan Machinery Technology Co Ltd
Current assignee: Ningbo Yuguan Machinery Technology Co Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-05-26
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a novel slow piston for air spring relates to air spring technical field, include: the piston body, set up the piston clamp plate in piston body upper portion and lower part, and piston seal, two piston clamp plates are used for pressing from both sides tight fixed with the piston body, all be equipped with the centre bore on piston body and the piston clamp plate, piston body and piston clamp plate pass through the centre bore and fix in piston rod one end, the piston body includes the piston body, lower piston body and conducting hole, the conducting hole is used for communicateing upper piston body and lower piston body, be equipped with piston seal between upper piston body and the lower piston body, all be equipped with helix type groove and side opening on upper piston body and the lower piston body, helix type groove is used for communicateing conducting hole and side opening, helix type inslot still is equipped with at least one groove dog, adopt above-mentioned technical scheme, can reach the purpose of extension circulation path through the setting in helix type groove, realize the slow.

Description

Novel retarding piston for air spring

Technical Field

The utility model belongs to the technical field of the air spring technique and specifically relates to a novel slow piston for air spring.

Background

The gas spring has wide application, and the working principle of the gas spring is that inert gas or oil-gas mixture is filled in a closed pressure cylinder, so that the pressure in a cavity is many times higher than the atmospheric pressure, and the movement of a piston rod is realized by utilizing the pressure difference generated by the cross section area of the piston rod being smaller than that of the piston; the gas spring has simple structure and reliable work, when it is used to implement reciprocating motion, it can remove speed reducer, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical systems, and the output force of gas spring is directly proportional to effective area of piston and its pressure difference.

At present in miniaturized air spring use, there is often the not good problem of air spring slow-down effect because under the condition that air spring steel pipe external diameter is less than 20mm, because inner space is narrow and small, the slow-down effect of unable effectual improvement air spring.

The main piston for the air spring, as disclosed in chinese utility model patent CN207178559U, is installed at the bottom of the piston rod of the air spring, including a piston body, the piston body: the front end of the piston body is provided with an inner cavity with an opening facing the direction of the piston rod, the rear end of the piston body is provided with a stepped hole, the inner cavity is communicated with the small hole of the stepped hole through a through hole, the periphery of the rear end of the piston body is provided with a front flange and a rear flange which are in sliding fit with an inner cylinder barrel of the air spring, an annular groove for mounting a main sealing ring of the air spring is formed between the front flange and the rear flange, a radial hole communicated with the through hole is formed in the piston body on the front side of the front flange, the bottom end face of the piston body is positioned around a large hole of the stepped hole and is provided with an. The utility model discloses an used main piston of air spring can't realize effectively improving the slow fast effect of air spring under the miniaturized condition.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an above-mentioned defect to prior art existence, a novel slow piston for air spring has especially been proposed, has solved the problem that current small-size air spring slow effect is not good.

In order to solve the technical problem, the utility model provides a novel slow piston for air spring, include: the piston body, set up the piston clamp plate in piston body upper portion and lower part, and piston seal, two piston clamp plates are used for pressing from both sides tight fixed with the piston body, all be equipped with the centre bore on piston body and the piston clamp plate, piston body and piston clamp plate pass through the centre bore and fix in piston rod one end, the piston body includes the piston body, lower piston body and conducting hole, the conducting hole is used for communicateing upper piston body and lower piston body, be equipped with piston seal between upper piston body and the lower piston body, all be equipped with helix type groove and side opening on upper piston body and the lower piston body, helix type groove is used for communicateing conducting hole and side opening, helix type inslot still is equipped with at least one groove dog, adopt above-mentioned technical scheme, can reach the purpose of extension circulation path through the setting in helix type groove, realize the slow.

Wherein, the via hole and the side opening are oppositely arranged at two sides of the central hole.

The height of the groove stop block is smaller than the depth of the spiral line type groove, so that the spiral line type groove cannot be blocked by the groove stop block.

Wherein, four groove check blocks are distributed in the spiral line type grooves on the upper piston body and the lower piston body.

Wherein, the side opening is also provided with an opening stopper which divides the side opening into two sections of openings.

Wherein, the diameter of piston clamp plate is slightly less than the diameter of piston body.

The upper piston body and the lower piston body are designed to be integrally formed, and a sealing groove for mounting a piston sealing element is arranged between the upper piston body and the lower piston body.

Wherein, the side walls of the upper piston body and the lower piston body are provided with a plurality of grooves; the number of the grooves is three, the grooves are uniformly distributed on the side walls of the upper piston body and the lower piston body, and the grooves reduce the contact area between the piston body and the inner wall of the gas spring pipe body, so that friction is reduced.

Drawings

Fig. 1 is a perspective view of a piston body of a novel retarding piston for an air spring according to the present invention;

FIG. 2 is a view of the piston body of the novel retard piston for an air spring in accordance with the present invention;

FIG. 3 is a structural diagram of the piston body and the piston pressing plate of the present invention;

fig. 4 is a schematic view illustrating the application of the novel retarding piston for an air spring to the air spring according to the present invention;

in the figure: 1 is a gas spring pipe body; 2 is a piston rod; 3 is a piston body; 4 is a piston pressure plate; 5 is a piston seal ring; 6 is an upper piston body; 7 is a lower piston body; 8 is a central hole; 9 is a via hole; 10 is a spiral line type groove; 11 is a side opening; 12 is a groove stop block; 13 is an opening stop block; 14 is a sealing groove; and 15 is a groove.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1:

the utility model discloses a novel slow piston for gas spring, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, include: the piston comprises a piston body 3, piston pressing plates 4 arranged at the upper part and the lower part of the piston body 3, and piston sealing parts 5, wherein the two piston pressing plates 4 are used for clamping and fixing the piston body 3, central holes 8 are arranged on the piston body 3 and the piston pressing plates 4, the piston body 3 and the piston pressing plates 4 are fixed at one end of a piston rod 2 through the central holes 8, the piston body 3 comprises an upper piston body 6, a lower piston body 7 and a conducting hole 9, the conducting hole 9 is used for communicating the upper piston body 6 with the lower piston body 7, the piston sealing parts 5 are arranged between the upper piston body 6 and the lower piston body 7, spiral line grooves 10 and side openings 11 are arranged on the upper piston body 6 and the lower piston body 7, the spiral line grooves 10 are used for communicating the conducting hole 9 with the side openings 11, at least one groove stop 12 is further arranged in the spiral line grooves 10, and in this, Piston clamp plate 4 is fixed the setting in proper order to fix the one end at piston rod 2 through the installation of centre bore 8, piston clamp plate 4's diameter slightly is less than piston body 3's diameter, makes piston clamp plate 4 can not plug up side opening 11, and piston rod 2 stretches into air spring body 1 together with piston clamp plate 4 and piston body 3 in, and piston sealing member 5 also is used for the contact of

piston body

3 and 1 inner wall of air spring body and is sealed.

As shown in fig. 1, in this embodiment, the moving speed of the piston rod 2 in the operation of the gas spring is slowed down by extending the flow path of the inert gas or the oil-gas mixture in the gas spring, so as to enhance the buffering and improve the slow-moving effect, specifically, two piston pressing plates 4 are respectively pressed and fixed with the upper piston body 6 and the lower piston body 7, so that the spiral-line-shaped groove 10 of the upper piston body 6, the via hole 9, and the spiral-line-shaped groove 10 of the lower piston body 7 become a complete flow path, the side openings 11 on the upper piston body 6 and the lower piston body 7 are the inlet and the outlet of the flow path, thereby achieving the purpose of extending the flow path and enhancing the slow-moving effect of the gas spring, and in this embodiment, four groove stoppers 12 are distributed in the spiral-line-shaped grooves 10 on the upper piston body 6 and the lower piston body 7, and the height of the groove, the spiral line type groove 10 can not be blocked up by the groove stop block 12, namely, in the retarding piston of the embodiment, each groove stop block 12 can stop inert gas or oil-gas mixture in a step state, and the retarding effect is further enhanced through multiple current limiting.

As shown in fig. 1, the through hole 9 and the side opening 11 communicated with the spiral line type groove 10 are oppositely arranged at two sides of the central hole 8, according to different actual requirements, the number of spiral turns of the spiral line type groove 10, the groove width, the groove depth and the like can be correspondingly adjusted, and the spiral line type groove 10 can be set to be of an irregular curve structure.

Example 2:

compared with the embodiment 1, in the embodiment, the opening stopper 13 is further disposed on the side opening 11, and the opening stopper 13 divides the side opening 11 into two sections of openings, so that the inert gas or the oil-gas mixture is distributed when entering the spiral line type groove 10, and an effect of primarily slowing down the speed is achieved.

Example 3:

in this embodiment, the upper piston body 6 and the lower piston body 7 are designed to be integrally formed, and a sealing groove 14 for installing the piston sealing element 5 is arranged between the upper piston body 6 and the lower piston body 7, i.e. the whole piston body 3 is designed to be integrally formed, so that the production is simpler, the efficiency is higher, and the whole piston is simpler and more convenient to install on the gas spring.

Example 4:

in the present embodiment, the side walls of the upper piston body 6 and the lower piston body 7 are both provided with a plurality of grooves 15; the recess 15 quantity is three, and the equipartition is on the lateral wall of last piston body 6 and lower piston body 7, and the setting of recess 15 is more convenient for piston body 3 to install in air spring body 1, and recess 15 has reduced the area of contact of piston body 3 with 1 inner wall of air spring body promptly to reduce the friction.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a novel slow piston for gas spring which characterized in that, a novel slow piston for gas spring includes: the piston comprises a piston body (3), piston pressing plates (4) arranged at the upper part and the lower part of the piston body (3) and piston sealing parts (5), wherein the two piston pressing plates (4) are used for clamping and fixing the piston body (3), the piston body (3) and the piston pressing plates (4) are both provided with a central hole (8), the piston body (3) and the piston pressing plates (4) are fixed at one end of a piston rod (2) through the central hole (8), the piston body (3) comprises an upper piston body (6), a lower piston body (7) and a conducting hole (9), the conducting hole (9) is used for communicating the upper piston body (6) and the lower piston body (7), the piston sealing part (5) is arranged between the upper piston body (6) and the lower piston body (7), and both the upper piston body (6) and the lower piston body (7) are provided with a spiral line type groove (10) and a side opening (11), the spiral line type groove (10) is used for communicating the conducting hole (9) and the side opening (11), and at least one groove stop block (12) is further arranged in the spiral line type groove (10).

2. A new retarder piston for a gas spring as claimed in claim 1, characterized in that the through going hole (9) and the side opening (11) are arranged opposite to each other on both sides of the central hole (8).

3. A new retarder piston for a gas spring as claimed in claim 1, characterized in that the height of the groove stopper (12) is smaller than the depth of the spiral-shaped groove (10).

4. A new retarder piston for a gas spring as claimed in claim 3, characterised in that four groove stops (12) are distributed in the spiral shaped groove (10) of both the upper piston body (6) and the lower piston body (7).

5. A new retarder piston for a gas spring as claimed in claim 1, characterized in that said side opening (11) is further provided with a split stop (13), said split stop (13) dividing said side opening (11) into two segments.

6. A new retarder piston for a gas spring as claimed in claim 1, characterized in that the diameter of the piston pressure plate (4) is slightly smaller than the diameter of the piston body (3).

7. A new retarder piston for a gas spring as claimed in claim 1, characterised in that the upper piston body (6) and the lower piston body (7) are of one-piece design, a sealing groove (14) for mounting the piston seal (5) being provided between the upper piston body (6) and the lower piston body (7).

8. A new retarder piston for a gas spring as claimed in claim 1, characterised in that the side walls of both the upper piston body (6) and the lower piston body (7) are provided with grooves (15).

9. A new retarder piston for a gas spring as claimed in claim 8, characterized in that said grooves (15) are three in number, evenly distributed on the side walls of said upper (6) and lower (7) piston bodies.