CN213776184U

CN213776184U - Piston multi-stage throttling hole structure

Info

Publication number: CN213776184U
Application number: CN202022181264.5U
Authority: CN
Inventors: 熊泓茗; 李晓; 张玉
Original assignee: Sichuan Golden Armor Dimma Railway Special Equipment Ltd By Share Ltd
Current assignee: Sichuan Golden Armor Dimma Railway Special Equipment Ltd By Share Ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-07-23
Anticipated expiration: 2030-09-29

Abstract

The utility model relates to a piston multistage orifice structure, which comprises a piston body, wherein the piston body is provided with a piston oil through hole, a throttling module is arranged in the piston oil through hole in a sliding manner, and one end of the piston oil through hole is provided with an oil flow hole which is not larger than the aperture of the piston oil through hole; the throttling module comprises a plurality of throttling bodies which are sequentially communicated, one end of each throttling body is communicated with the oil flow hole, the other end of each throttling body is communicated with the throttling hole tightening cap, a first oil passing hole is formed in each first throttling hole, first ring grooves are formed in the axial side faces of the outer walls of the throttling bodies, first O-shaped rings are filled in the first ring grooves, and sealing areas are formed in the inner cavities of the piston bodies by the first O-shaped rings; through this scheme, the step-down characteristic of utilization orifice is reequiped the piston, and its structure is not only simple but also practical, and can effectively reduce fluid and strike, reduces the bubble in the fluid, has guaranteed hydraulic system's performance and safety.

Description

Piston multi-stage throttling hole structure

Technical Field

The utility model belongs to the technical field of the oil pressure damping technique and specifically relates to a multistage orifice structure of piston is related to and is used for piston equipment field for the oil pressure damping.

Background

The piston of the existing oil pressure shock absorber is generally provided with an endless through hole, the piston can cause shock in the operation of the shock absorber, and bubbles can be generated in oil liquid to influence the performance of the shock absorber; in addition, a small part of the piston is provided with a normally open hole, but is only a small hole, and the shock of the liquid flow by shooting cannot be relieved. During the acceleration of the train, the damper must be set to be smooth when the damper transits from the low-speed area to the high-speed area, and the response area is large enough. The existing pistons have the defect that the smooth transition cannot be realized because the impact occurs in the running process, and particularly the larger impact is generated in the acceleration process. The utility model provides a piston multistage orifice structure, with above-mentioned defect of solving.

SUMMERY OF THE UTILITY MODEL

In order to overcome and strike shortcoming such as too big and fluid gassing in the current shock absorber, the utility model provides a multistage orifice structure of piston. The principle of the orifice is that the liquid flow can generate damping when passing through the small hole, and the impact of the liquid flow is reduced. By utilizing the advantages of the throttling hole, excessive bubbles can not be generated when oil passes through the piston, the impact of the oil can be effectively reduced, and the performance of a hydraulic system is improved.

In order to realize the technical scheme, the utility model discloses a following technical scheme realizes:

a piston multi-stage throttling hole structure comprises a piston body, wherein the piston body is provided with a piston oil through hole, a throttling module is arranged in the piston oil through hole, and the piston oil through hole is a stepped hole;

the throttling module comprises at least two throttling bodies, the throttling bodies are coaxially arranged, a stepped oil passing hole is formed in each throttling body, and a throttling hole tightening cap is arranged in each piston oil passing hole to fasten the throttling bodies in the piston oil passing holes.

In order to better realize the utility model discloses, as the further description of above-mentioned technical scheme, all be provided with first round groove on the choke lateral wall, first circle inslot all is filled has first O shape circle, first O shape circle forms the sealing area in the interior intracavity of piston body.

As a further description of the above technical solution, a second oil passing hole is provided on the throttle hole cap, one end of the second oil passing hole communicates with the stepped oil passing hole, and a plurality of dismounting holes are provided on an end surface of the other end.

As a further description of the above technical solution, a second annular seal groove is arranged on a side wall of the throttle body close to the throttle body of the throttle tight cap, a second O-shaped seal ring is filled in the second annular seal groove, and the second O-shaped seal ring forms a seal area in an inner cavity of the piston body.

As a further description of the above technical solution, an inner thread is provided on an inner wall of the piston oil through hole, an outer thread is provided on an outer side wall of the throttle hole tightening cap, and the throttle hole tightening cap is in threaded connection with the piston body.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses a improve the piston oil through hole, set up throttle module isotructure in the piston oil through hole after improving simultaneously, then utilize the step-down characteristic of orifice to reequip the piston, its structure is not only simple but also practical, and can effectively reduce the fluid and strike, reduces the bubble in the fluid, has guaranteed hydraulic system's performance and safety.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the valve body of the present invention;

FIG. 3 is a schematic diagram of the piston plane structure of the present invention;

FIG. 4 is a schematic view of the throttle body of the present invention;

fig. 5 is a schematic view of the structure of the orifice locking cap of the present invention.

The figure marks 1-piston body, 2-piston oil through hole, 3-throttling module, 31-throttling body, 32-throttling hole tightening cap, 312-first ring groove, 313-first O-shaped ring, 321-second oil through hole, 322-dismounting hole, 323-second ring groove and 324-second O-shaped ring.

Detailed Description

The present invention will be described in detail and with reference to the preferred embodiments of the present invention, but the present invention is not limited thereto.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

The terms "upper", "lower", "left", "right", "inner", "outer", and the like refer to orientations or positional relationships based on the drawings, or the orientations or positional relationships that are conventionally used to place the products of the present invention, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "vertical" and the like do not require absolute perpendicularity between the components, but may be slightly inclined. Such as "vertical" merely means that the direction is relatively more vertical and does not mean that the structure must be perfectly vertical, but may be slightly inclined.

In the description of the present invention, it is also to be understood that the terms "disposed," "mounted," "connected," and the like are intended to be construed broadly unless otherwise specifically indicated and limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as a preferred embodiment, it is shown in FIG. 1 to FIG. 5;

a piston multi-stage throttling hole structure comprises a piston body 1, wherein the piston body 1 is provided with a piston oil through hole 2, a throttling module 3 is arranged in the piston oil through hole 2, and the piston oil through hole 2 is a stepped hole;

the throttling module 3 comprises at least two throttling bodies 31, the at least two throttling bodies 31 are coaxially arranged, a stepped oil passing hole is formed in each throttling body 31, and a throttling hole tightening cap 32 is arranged in each piston oil passing hole 2 to fasten the throttling bodies 31 in the piston oil passing holes 2.

In order to more clearly and clearly explain the present invention, as an optimal implementation manner, in this embodiment, first, the piston body 1 is reformed, so that the original structure of the piston body 1 has a larger cavity in which the throttle module 3 can be installed, and the compactness of the whole structure is effectively ensured; next, all install the throttle body 31 and the throttle body that all have the shoulder hole in proper order in the inner chamber of piston body 1 to carry out threaded connection with tight cap 32 of orifice and piston body 1, through this connected mode, effectively guaranteed the use the utility model discloses a stability of damping piston structure at the train acceleration in-process.

In order to further clarify and clarify the present invention, in the present embodiment, a shoulder hole is formed in the throttle body 31 and the throttle hole tightening cap 32 of the throttle module 3, and the shoulder hole of the throttle body 31 adjacent to the oil flow hole 4 of the piston body 1 is communicated with the oil flow hole 4, so that the oil for damping during the acceleration of the train flows into the shoulder hole from the oil flow hole 4, and the oil generates damping when passing through the shoulder hole, thereby reducing the impact of the oil. Through setting up the aperture of echelonment for fluid can not produce too much bubble when the piston, and, fluid can not produce too much bubble when the shoulder hole, makes the process orifice that fluid can be mild, has solved among the original structure fluid can be because speed is very fast and strike the piston and lead to the defect of piston damage when passing through the piston. The utility model discloses in, through the shoulder hole that sets up for the fluid has reduced the impact force of fluid because of slowing down when flowing through the piston, and the overall structure's that promotes life, has promoted whole hydraulic system's performance and advantage simultaneously.

In order to better realize the present invention, as a further description of the above technical solution, the throttle body 31 is provided with a first ring groove 312 on the side wall, the first ring groove 312 is filled with a first O-ring, and the first O-ring 313 forms a sealing area in the inner cavity of the piston body 1.

As a further description of the above technical solution, the orifice fastening cap 32 is provided with a second oil passing hole 321, one end of the second oil passing hole 321 is communicated with the stepped oil passing hole, and the end surface of the other end is provided with a plurality of dismounting holes 322.

As a further description of the above technical solution, a second annular seal groove is disposed on the side wall of the throttle body 31 close to the throttle body 32, and a second O-ring is filled in the second annular seal groove and forms a seal area in the inner cavity of the piston body 1.

For clearer and clearer explanation of the present invention, in the present embodiment, as a preferred embodiment, the second O-ring 324 is provided on the orifice locking cap 32, and the second O-ring 324 is hermetically connected to the inner cavity of the piston oil passage hole 2, so that the sealing performance between the orifice locking caps 32 is ensured.

As a further description of the above technical solution, the inner wall of the piston oil through hole 2 is provided with an internal thread, the outer side wall of the orifice fastening cap 32 is provided with an external thread, and the orifice fastening cap 32 is in threaded connection with the piston body 1.

For clearer and more definite explanation of the present invention, as a preferred embodiment, in this embodiment, the throttle hole tightening cap 32 is screwed with the piston body 1, so as to further effectively improve the sealing performance of the piston oil through hole 2 of the whole piston body 1.

For better realization the utility model discloses, as preferred embodiment, as shown in fig. 1 ~ 5, the utility model discloses a work flow is: first, the first O-ring 313 and the second O-ring 324 are respectively installed in the first ring groove 312 and the second ring groove 323 of the throttle body 31 and the throttle clamp cap 32, then, the throttle body 31 is installed in sequence, and in the installation process, the stepped hole needs to be communicated with the oil flow hole 4, further, after the throttle body 31 is installed, the throttle clamp cap 32 is installed in the cavity of the piston body 1, in the installation of the throttle clamp cap 32, the throttle clamp cap 32 needs to be screwed with the inner cavity of the piston, further, the piston structure is installed on the damping mechanism of the train, and finally, the piston structure with multi-stage throttle damping is formed.

It should be particularly clear and explained that, as a preferred embodiment, in this embodiment, the stepped hole is formed by connecting a plurality of large holes and a plurality of small holes at intervals in sequence, and throttling is realized by gradient change of different hole diameters.

Through the scheme, the piston is modified by utilizing the pressure reduction characteristic of the throttling hole, the structure is simple and practical, the impact of oil can be effectively reduced, bubbles in the oil are reduced, and the performance and safety of a hydraulic system are guaranteed.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A piston multiple orifice arrangement characterized by: the piston comprises a piston body (1), wherein the piston body (1) is provided with a piston oil through hole (2), a throttling module (3) is arranged in the piston oil through hole (2), and the piston oil through hole (2) is a stepped hole;

the throttling module (3) comprises at least two throttling bodies (31), the at least two throttling bodies (31) are coaxially arranged, a stepped oil passing hole is formed in each throttling body (31), and a throttling hole tightening cap (32) is arranged in each piston oil passing hole (2) to fasten the throttling bodies (31) in the piston oil passing holes (2).

2. A piston multiple orifice arrangement as set forth in claim 1, wherein: the side wall of the throttle body (31) is provided with first ring grooves (312), the first ring grooves (312) are filled with first O-shaped rings (313), and the first O-shaped rings (313) form sealing areas in the inner cavity of the piston body (1).

3. A piston multiple orifice arrangement as set forth in claim 2, wherein: and a second oil passing hole (321) is formed in the throttling hole tightening cap (32), one end of the second oil passing hole (321) is communicated with the stepped oil passing hole, and a plurality of dismounting holes (322) are formed in the end face of the other end of the second oil passing hole.

4. A piston multiple orifice arrangement as set forth in claim 2, wherein: a second annular sealing groove (323) is formed in the side wall, close to the throttle body (31), of the throttle hole tightening cap (32), a second O-shaped sealing ring (324) is filled in the second annular sealing groove (323), and a sealing area is formed in the inner cavity of the piston body (1) by the second O-shaped sealing ring (324).

5. A piston multiple orifice arrangement as set forth in claim 4, wherein: the inner wall of the piston oil through hole (2) is provided with internal threads, the outer side wall of the throttling hole tightening cap (32) is provided with external threads, and the throttling hole tightening cap (32) is in threaded connection with the piston body (1).