CN116104836A

CN116104836A - Piston assembly

Info

Publication number: CN116104836A
Application number: CN202310397774.1A
Authority: CN
Inventors: 陈玉元; 徐继旭; 郭道新; 孙康和
Original assignee: Yizheng Tianhua Piston Ring Co ltd
Current assignee: Yizheng Tianhua Piston Ring Co ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-05-12
Anticipated expiration: 2043-04-14
Also published as: CN116104836B

Abstract

The invention belongs to the technical field of test equipment, and particularly relates to a piston assembly, which aims to solve the technical problem that the tightness between a piston and a piston cylinder is changed along with the disappearance of the elasticity of a piston sealing ring so that the situation of air leakage or liquid leakage can occur between the piston and the piston cylinder; the driving threaded sleeve is manually rotated, and through threaded connection between the driving threaded sleeve and the mounting sleeve, the driving threaded sleeve moves along the axis of the mounting sleeve, and then the distance between the driving threaded sleeve and the mounting sleeve changes, so that the precompression amount of the pushing spring is adjusted.

Description

Piston assembly

Technical Field

The invention belongs to the technical field of test equipment, and particularly relates to a piston assembly.

Background

In the use process of the existing piston assembly, the elasticity of the piston sealing ring disappears, so that the tightness between the piston and the piston cylinder is changed, and the situation of air leakage or liquid leakage between the piston and the piston cylinder is caused;

for example, the patent application number is CN 202221114742.3's a hydro-cylinder piston sealing performance verifying attachment, including the frame, install the experiment pneumatic cylinder in the frame, be provided with the piston rod in the experiment pneumatic cylinder, its characterized in that: the piston rod fixed connection slider, install servo motor in the frame, servo motor's output shaft lead screw, lead screw pass slider and slider threaded connection, set up the slide rail in the frame, slide rail and slider sliding connection, but this technical scheme is nevertheless can verify the leakproofness of piston leakproofness, but does not have the solution along with the elasticity disappearance of piston seal ring for the leakproofness between piston and the piston cylinder changes and causes the condition emergence of gas leakage or weeping between piston and the piston cylinder to take place.

Disclosure of Invention

The invention aims to provide a piston assembly, which solves the technical problem that the sealing performance between a piston and a piston cylinder is changed along with the disappearance of the elasticity of a piston sealing ring so that the situation of air leakage or liquid leakage between the piston and the piston cylinder can occur.

In order to achieve the above purpose, the specific technical scheme of the piston assembly of the invention is as follows:

the piston assembly comprises an expansion assembly, a piston main body assembly, an inner end sliding block assembly and a connecting assembly, wherein the expansion assembly is connected with the piston main body assembly, the inner end sliding block assembly is connected with the piston main body assembly, and the connecting assembly is simultaneously connected with the expansion assembly and the piston main body assembly;

the expansion assembly comprises a lower end limiting plate, a convex opening, a first limiting mounting block, a first limiting screw and a first threaded rotating rod, wherein a plurality of convex openings are formed in the lower end limiting plate, the first limiting mounting block is mounted in each convex opening in a limiting manner through the first limiting screw, and the first threaded rotating rod is fixedly mounted on the lower end limiting plate;

the piston main body assembly comprises an upper end limiting plate, a piston ring mounting sleeve, a matching notch, a lower end opening, a mounting sleeve, a mounting screw II, a hollow cavity, a sliding sleeve, a pushing spring and a driving threaded sleeve, wherein the piston ring mounting sleeve is fixedly mounted at one end of the upper end limiting plate, the mounting sleeve is fixedly mounted at the other end of the upper end limiting plate through the mounting screw II, the matching notch and the lower end opening are formed in the piston ring mounting sleeve, the lower end opening is communicated with the matching notch, the hollow cavity is formed in the piston ring mounting sleeve and communicated with the matching notch, the sliding sleeve is slidably mounted on the mounting sleeve, the driving threaded sleeve is mounted on the mounting sleeve in a threaded manner, the pushing spring is sleeved on the mounting sleeve, the pushing spring is arranged between the sliding sleeve and the driving threaded sleeve, and the first threaded rotating rod is mounted at the inner end of the mounting sleeve in a plug-in manner.

Further, the push spring is in a compressed state.

Further, the upper part of the mounting sleeve is provided with threads.

Further, the inner slider subassembly includes inner slider body, supplementary extension piece, articulated connecting rod, inner gag lever post, gag lever post set screw, upper end connecting block, lower extreme connecting block and cooperation recess, the one end at articulated connecting rod is installed in articulated slider body articulated, and articulated install on sliding sleeve the other end of connecting rod, and inner slider body sliding fit installs the inner at the fretwork cavity, has the inner gag lever post through gag lever post set screw fixed mounting in the inner slider body, and the one end fixed mounting of supplementary extension piece has the upper end connecting block, and the other end fixed mounting of supplementary extension piece has the lower extreme connecting block, and it has the cooperation recess to open on the lower extreme connecting block, cooperation recess and the spacing cooperation of inner gag lever post sliding, lower extreme connecting block slidable mounting is in protruding type opening.

Further, the initial position of the inner end sliding block body is matched with the matched notch.

Further, coupling assembling includes inner screw thread sleeve pipe, manual dish, lateral wall mounting screw, articulated mount pad and mount pad spacing ring, inner screw thread sleeve pipe rotates and installs on the mount pad, and inner screw thread sleeve pipe and a screw thread cooperation of screw thread bull stick simultaneously, and fixed mounting has manual dish on the inner screw thread sleeve pipe, and manual dish has the mount pad spacing ring through lateral wall mounting screw fixed mounting, and mount pad spacing ring rotates spacing cooperation with articulated mount pad.

The invention has the advantages that:

1. the driving threaded sleeve is manually rotated, and the driving threaded sleeve moves along the axis of the mounting sleeve through threaded connection between the driving threaded sleeve and the mounting sleeve, so that the precompression amount of the pushing spring is adjusted through the change of the distance between the driving threaded sleeve and the sliding sleeve;

2. with the loss of a piston sealing ring sleeved between the expansion assembly and the piston main body assembly, the elasticity of the piston sealing ring is reduced, so that the piston sealing ring cannot play a sealing effect, the sliding sleeve is enabled to move downwards under the action of the elasticity of the pushing spring, the inner end sliding block body is driven to extend outwards at the inner end of the hollow cavity through the hinged connecting rod, the inner end of the piston sealing ring is enabled to be enabled to act under the action of the inner end sliding block body, the gap between the piston sealing ring and the piston cylinder is reduced under the action of pressure, and the tightness between the piston sealing ring and the piston cylinder is further improved; meanwhile, the acting force of the inner end sliding block body on the piston sealing ring is adjusted by adjusting the precompression amount of the pushing spring, so that the stability of the sealing performance between the piston sealing ring and the piston cylinder is conveniently maintained;

3. in order to use sealing rings with different sizes, the manual disc is manually rotated, the inner end threaded sleeve is driven to rotate by the manual disc, and the distance between the lower end limiting plate and the upper end limiting plate is changed by the threaded fit between the inner end threaded sleeve and the first threaded rotating rod, so that the sealing rings with different sizes are conveniently adapted;

4. in order to ensure the supporting force of the inner rings of the piston sealing rings with different sizes, the distance between the lower end limiting plate and the upper end limiting plate is changed, under the combined action of the lower end connecting block and the convex opening, the auxiliary expansion block and the inner end sliding block body slide relatively, and the distance variable between the auxiliary expansion block and the inner end sliding block body is equal to the distance variable between the lower end limiting plate and the upper end limiting plate.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the cross-sectional location of FIG. 1;

FIG. 3 is a sectional elevation view of FIG. 2 taken along section A-A;

FIG. 4 is a schematic diagram of an expansion assembly according to the present invention;

FIG. 5 is a schematic diagram of the cross-sectional position of FIG. 4;

FIG. 6 is a sectional elevation view of FIG. 5 taken along section B-B;

FIG. 7 is a schematic view of a piston body assembly according to the present invention;

FIG. 8 is a schematic diagram of the cross-sectional position of FIG. 7;

FIG. 9 is a sectional elevation view of FIG. 8 taken along section C-C;

FIG. 10 is a schematic view of the inner end slider assembly of the present invention;

FIG. 11 is a schematic diagram of the cross-sectional position of FIG. 10;

FIG. 12 is a sectional elevation view of FIG. 11 taken along section G-G;

FIG. 13 is a schematic diagram of an auxiliary expansion block structure according to the present invention;

FIG. 14 is a schematic diagram II of the cross-sectional position of FIG. 10;

FIG. 15 is a sectional elevation view of FIG. 14 taken along section H-H;

FIG. 16 is a schematic view of a connection assembly according to the present invention;

FIG. 17 is a schematic diagram of the cross-sectional position of FIG. 16;

FIG. 18 is a sectional elevation view of FIG. 17 taken along section I-I;

the figure indicates:

an expansion assembly 1; the lower end limiting plate 1-1; a convex opening 1-2; 1-3 of a limiting mounting block; 1-4 of limit screws; 1-5 of a screw thread rotating rod; a piston body assembly 2; an upper limit plate 2-1; 2-2 of a piston ring mounting sleeve; mating notches 2-3; the lower end is opened 2-4; 2-5 of mounting sleeve; mounting screws II 2-6; 2-7 of hollow cavities; 2-8 of sliding sleeve; pushing springs 2-9; driving the threaded sleeve 2-10; an inner end slider assembly 3; an inner end slider body 3-1; an auxiliary expansion block 3-3; 3-4 of hinged connecting rods; 3-5 of an inner end limiting rod; 3-6 of stop lever fixing screws; 3-7 of an upper connecting block; 3-8 of a lower connecting block; mating grooves 3-9; a connection assembly 4; an inner threaded sleeve 4-1; a manual disk 4-2; the side wall is provided with a screw 4-3; 4-4 of hinged mounting seats; and 4-5 of a mounting seat limiting ring.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example 1

As shown in fig. 1-3, the piston assembly comprises an expansion assembly 1, a piston main body assembly 2, an inner end sliding block assembly 3 and a connecting assembly 4, wherein the expansion assembly 1 is connected with the piston main body assembly 2, the inner end sliding block assembly 3 is connected with the piston main body assembly 2, and the connecting assembly 4 is simultaneously connected with the expansion assembly 1 and the piston main body assembly 2;

as shown in fig. 4-6, the expansion assembly 1 comprises a lower end limiting plate 1-1, a convex opening 1-2, a limiting installation block 1-3, a limiting screw 1-4 and a threaded rotating rod 1-5, wherein the lower end limiting plate 1-1 is provided with a plurality of convex openings 1-2, each convex opening 1-2 is provided with the limiting installation block 1-3 in a limiting way through the limiting screw 1-4, and the lower end limiting plate 1-1 is fixedly provided with the threaded rotating rod 1-5 in a limiting way, so that the limiting of the convex opening 1-2 is realized through the limiting installation block 1-3;

as shown in fig. 7-9, the piston main body assembly 2 comprises an upper end limiting plate 2-1, a piston ring mounting sleeve 2-2, a matching notch 2-3, a lower end opening 2-4, a mounting sleeve 2-5, a mounting screw 2-6, a hollow cavity 2-7, a sliding sleeve 2-8, a pushing spring 2-9 and a driving threaded sleeve 2-10, wherein one end of the upper end limiting plate 2-1 is fixedly provided with the piston ring mounting sleeve 2-2, the other end of the upper end limiting plate 2-1 is fixedly provided with the mounting sleeve 2-5 through the mounting screw 2-6, the piston ring mounting sleeve 2-2 is provided with the matching notch 2-3 and the lower end opening 2-4, the lower end opening 2-4 is communicated with the matching notch 2-3, the piston ring mounting sleeve 2-2 is internally provided with the hollow cavity 2-7, the hollow cavity 2-7 is communicated with the matching notch 2-3, the sliding sleeve 2-8 is slidably mounted on the mounting sleeve 2-5, the driving threaded sleeve 2-10 is threadedly mounted on the mounting sleeve 2-5, the pushing spring 2-9 is sleeved on the driving threaded sleeve 2-5, the pushing spring 2-5 is rotatably mounted on the driving sleeve 2-5, the driving threaded sleeve 2-10 is rotatably mounted on the mounting sleeve 2-5 through the driving threaded sleeve 2-5, the driving sleeve 2-10 is rotatably arranged between the driving sleeve 2-5 and the driving sleeve 2-5, the driving threaded sleeve 2-10 moves along the axis of the mounting sleeve 2-5, and the precompression amount of the pushing spring 2-9 is adjusted by changing the interval between the driving threaded sleeve 2-10 and the sliding sleeve 2-8;

wherein the pushing springs 2-9 are in a compressed state;

wherein the upper part of the mounting sleeve 2-5 is provided with threads.

Example 2

As shown in fig. 10-15, the inner end sliding block assembly 3 comprises an inner end sliding block body 3-1, an auxiliary expansion block 3-3, a hinged connecting rod 3-4, an inner end limiting rod 3-5, a limiting rod fixing screw 3-6, an upper end connecting block 3-7, a lower end connecting block 3-8 and a matching groove 3-9, wherein the inner end sliding block body 3-1 is hinged at one end of the hinged connecting rod 3-4, the other end of the hinged connecting rod 3-4 is hinged on a sliding sleeve 2-8, the inner end sliding block body 3-1 is in sliding fit with the inner end of the hollow cavity 2-7, the inner end limiting rod 3-5 is fixedly arranged in the inner end sliding block body 3-1 through the limiting rod fixing screw 3-6, the upper end connecting block 3-7 is fixedly arranged at one end of the auxiliary expansion block 3-3, the other end of the auxiliary expansion block 3-3 is fixedly arranged with the lower end connecting block 3-8, the lower end connecting block 3-8 is provided with the matching groove 3-9, the matching groove 3-9 is in sliding and limiting fit with the inner end limiting rod 3-5, the lower end 3-8 is in sliding fit with the convex connecting block 2, the convex connecting block 1 is in sliding fit with the sliding sleeve 2, the sealing ring 2 is not arranged in the sliding sleeve 2, the sealing ring 2 is in sliding fit with the sealing ring 2 is in the sealing ring 2-2, the sealing ring 2 is not stretched out, the sealing ring 2 is in sliding sleeve is in sliding fit with the sealing ring 2, and the sealing ring 2 is in sliding fit with the sealing ring 2, the sealing ring 2 is not stretched out, and the sealing ring 2 is in sealing ring, the inner end of the piston sealing ring is enabled to be reduced under the action of the inner end sliding block body 3-1, so that the gap between the piston sealing ring and the piston cylinder is reduced under the action of pressure, and the tightness between the piston sealing ring and the piston cylinder is further improved; meanwhile, the acting force of the inner end sliding block body 3-1 on the piston sealing ring is adjusted by adjusting the precompression amount of the pushing spring 2-9, so that the stability of the sealing performance between the piston sealing ring and the piston cylinder is conveniently maintained.

Wherein, the initial position of the inner end sliding block body 3-1 is matched with the matched notch 2-3.

Example 3

As shown in fig. 16-18, the connecting component 4 includes an inner threaded sleeve 4-1, a manual disc 4-2, a side wall mounting screw 4-3, a hinged mounting seat 4-4 and a mounting seat limiting ring 4-5, the inner threaded sleeve 4-1 is rotatably mounted on the mounting sleeve 2-5, meanwhile, the inner threaded sleeve 4-1 is in threaded fit with a threaded rotating rod 1-5, the manual disc 4-2 is fixedly mounted on the inner threaded sleeve 4-1, the mounting seat limiting ring 4-5 is fixedly mounted on the manual disc 4-2 through the side wall mounting screw 4-3, and the mounting seat limiting ring 4-5 is in rotational limit fit with the hinged mounting seat 4-4, so that sealing rings with different sizes are used, the manual disc 4-2 is rotated, the inner threaded sleeve 4-1 is driven to rotate through the manual disc 4-2, and the distance between the lower end limiting plate 1-1 and the upper end limiting plate 2-1 is changed through threaded fit between the inner threaded sleeve 4-1 and the threaded rotating rod 1-5, so that sealing rings with different sizes are convenient to adapt to sealing rings; meanwhile, in order to ensure the supporting force of the inner rings of the piston sealing rings with different sizes, along with the change of the distance between the lower end limiting plate 1-1 and the upper end limiting plate 2-1, under the combined action of the lower end connecting block 3-8 and the convex opening 1-2, the auxiliary expansion block 3-3 and the inner end sliding block body 3-1 slide relatively, and the distance change between the auxiliary expansion block 3-3 and the inner end sliding block body 3-1 is equal to the distance change between the lower end limiting plate 1-1 and the upper end limiting plate 2-1.

It will be understood that the invention has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The piston assembly is characterized by comprising an expansion assembly (1), a piston main body assembly (2), an inner end sliding block assembly (3) and a connecting assembly (4), wherein the expansion assembly (1) is connected with the piston main body assembly (2), the inner end sliding block assembly (3) is connected with the piston main body assembly (2), and the connecting assembly (4) is simultaneously connected with the expansion assembly (1) and the piston main body assembly (2);

the expansion assembly (1) comprises a lower end limiting plate (1-1), a convex opening (1-2), a first limiting installation block (1-3), a first limiting screw (1-4) and a first threaded rotating rod (1-5), wherein the lower end limiting plate (1-1) is provided with a plurality of convex openings (1-2), each convex opening (1-2) is internally provided with the first limiting installation block (1-3) in a limiting way through the first limiting screw (1-4), and the first threaded rotating rod (1-5) is fixedly arranged on the lower end limiting plate (1-1);

the piston main body component (2) comprises an upper end limiting plate (2-1), a piston ring mounting sleeve (2-2), a matching notch (2-3), a lower end opening (2-4), a mounting sleeve (2-5), a mounting screw II (2-6), a hollowed cavity (2-7), a sliding sleeve (2-8), a pushing spring (2-9) and a driving threaded sleeve (2-10), wherein one end of the upper end limiting plate (2-1) is fixedly provided with the piston ring mounting sleeve (2-2), the other end of the upper end limiting plate (2-1) is fixedly provided with the mounting sleeve (2-5) through the mounting screw II (2-6), the piston ring mounting sleeve (2-2) is provided with the matching notch (2-3) and the lower end opening (2-4), the lower end opening (2-4) is communicated with the matching notch (2-3), the piston ring mounting sleeve (2-2) is internally provided with the hollow cavity (2-7), the hollowed cavity (2-7) is communicated with the matching notch (2-3), the sliding sleeve (2-8) is slidably mounted on the sliding sleeve (2-5) and the driving threaded sleeve (2-5) is mounted on the threaded sleeve (2-5), the pushing spring (2-9) is sleeved on the mounting sleeve (2-5), the pushing spring (2-9) is arranged between the sliding sleeve (2-8) and the driving threaded sleeve (2-10), the mounting sleeve (2-5) is provided with a first threaded rotating rod (1-5) in a plugging manner, and the first threaded rotating rod (1-5) is arranged at the inner end of the mounting sleeve (2-5).

2. The piston assembly according to claim 1, wherein the inner end sliding block assembly (3) comprises an inner end sliding block body (3-1), an auxiliary expansion block (3-3), a hinged connecting rod (3-4), an inner end limiting rod (3-5), a limiting rod fixing screw (3-6), an upper end connecting block (3-7), a lower end connecting block (3-8) and a matching groove (3-9), the inner end sliding block body (3-1) is hinged at one end of the hinged connecting rod (3-4), the other end of the hinged connecting rod (3-4) is hinged at one end of the sliding sleeve (2-8), the inner end sliding block body (3-1) is slidably matched at the inner end of the hollow cavity (2-7), the inner end limiting rod (3-5) is fixedly arranged in the inner end sliding block body (3-1) through a limiting rod fixing screw (3-6), one end of the auxiliary expansion block (3-3) is fixedly provided with the upper end connecting block (3-7), the other end of the auxiliary expansion block (3-3) is fixedly provided with the lower end (3-8), the lower end (3-8) is provided with the matching groove (3-9) and the inner end (3-9) is slidably matched with the limiting rod (3-5), the lower connecting block (3-8) is slidably arranged in the convex opening (1-2).

3. A piston assembly according to claim 2, wherein the initial position of the inner end slider body (3-1) is engaged with the engagement recess (2-3).

4. A piston assembly according to claim 1, wherein the connecting assembly (4) comprises an inner threaded sleeve (4-1), a manual disc (4-2), a side wall mounting screw (4-3), a hinge mounting seat (4-4) and a mounting seat limiting ring (4-5), the inner threaded sleeve (4-1) is rotatably mounted on the mounting sleeve (2-5) while the inner threaded sleeve (4-1) is in threaded engagement with a threaded rotating rod (1-5), the manual disc (4-2) is fixedly mounted on the inner threaded sleeve (4-1), the mounting seat limiting ring (4-5) is fixedly mounted on the manual disc (4-2) through the side wall mounting screw (4-3), and the mounting seat limiting ring (4-5) is in rotational limiting engagement with the hinge mounting seat (4-4).