CN213655298U

CN213655298U - Piston based on surfacing

Info

Publication number: CN213655298U
Application number: CN202022293026.3U
Authority: CN
Inventors: 叶艺明; 张沧; 张剑; 叶淳健; 李维举
Original assignee: Yunnan Xingchangjiang Industry Co ltd
Current assignee: Yunnan Xingchangjiang Industry Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-07-09
Anticipated expiration: 2030-10-15

Abstract

The utility model discloses a piston based on surfacing belongs to hydro-cylinder piston technical field, and its technical scheme is for including the cylinder body, set up the piston head in the inside of cylinder body, the piston head is including first piston head and the second piston head that can dismantle the connection, the surface of first piston head and second piston head all is provided with the surfacing layer, the surface of gyration of first piston head is provided with a plurality of gyration grooves, and is a plurality of communicate through a plurality of oil pipes that set up in first piston head between the gyration groove, the position that first piston head and second piston head are connected is provided with the seal groove, is provided with the sealing ring in the seal groove; the utility model provides a piston based on surfacing for the piston has fine intensity, is difficult for producing do not block, strain or locking.

Description

Piston based on surfacing

Technical Field

The utility model belongs to the technical field of the hydro-cylinder piston, concretely relates to piston based on surfacing.

Background

The oil cylinders are various, the oil cylinders are liquid or gas as working media and are used for transferring energy to realize various moving, fixing or pressurizing devices, and no matter any oil cylinder, a piston or a plunger is a key part in the oil cylinder.

The factors influencing the performance of the hydraulic oil cylinder are many, the structural form of the oil cylinder, the oil temperature control, the piston structure, the sealing form, the working condition, the material, the process level and the like. The piston and the piston rod in the hydraulic oil cylinder do reciprocating motion in the cylinder barrel, on the premise that the cylinder barrel meets the size parameters, the piston structure and the sealing form determine the performance of the hydraulic oil cylinder to a great extent, the outer diameter size of the piston and the inner diameter size of the oil cylinder have the requirement of fit clearance tolerance, and meanwhile, the size of the piston sealing structure and the size of the sealing ring also have the requirement of fit tolerance. Too big then let out leakage quantity too big in the clearance, can't improve pressure, cause the hydraulic oil loss, environmental pollution, the clearance undersize then generates heat easily under reciprocating motion's the condition and locks, strains the cylinder inner wall, and the sealing washer receives the damage, the unable normal operating of equipment.

In order to prevent or reduce the occurrence of leakage, locking, strain and the like, the piston should have the following requirements: the piston has proper hardness difference with the cylinder barrel, and the piston is internally provided with toughness, certain strength, good heat dissipation and stable processing technology, so that the performance requirement of the piston is met, the performance requirement of the hydraulic oil cylinder is finally ensured, and the service life of the hydraulic oil cylinder is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a piston based on surfacing, which comprises a first piston head and a second piston head which are detachably connected, and is convenient for later-stage disassembly, cleaning and maintenance; and the surfacing layers are arranged on the surfaces of the first piston head and the second piston head, so that the piston has good strength and is not easy to clamp, pull or lock.

The utility model aims at such realization, including the cylinder body, set up the piston head inside the cylinder body, the piston head is including dismantling first piston head and the second piston head of connection, the surface of first piston head and second piston head all is provided with the surfacing layer, the surface of gyration of first piston head is provided with a plurality of gyration grooves, and is a plurality of communicate through a plurality of oil pipes that set up in first piston head between the gyration groove, the position that first piston head and second piston head are connected is provided with the seal groove, is provided with the sealing ring in the seal groove.

The beneficial effects of the utility model are embodied in:

1. in the utility model, the piston head is composed of the first piston head and the second piston head which are detachably connected, so that the convenience of the later maintenance and cleaning operation of the piston head can be improved, and the separated first piston head and the separated second piston head can conveniently separate the sealing groove, thereby facilitating the dismantling and maintenance of the sealing ring from the sealing groove; because the plurality of rotary grooves are formed in the rotary surface of the first piston head and are communicated with each other through the plurality of oil pipes arranged in the first piston head, when the first piston head reciprocates in the cylinder body, the uniformity and the continuity of oil film formation caused by the fact that hydraulic oil can permeate in the rotary grooves through the oil pipes can be improved, and therefore the contact between the first piston head and the inner wall of the cylinder body is reduced, and the effect of being not easy to clamp or lock is enhanced.

2. In the utility model, the inner thread groove is arranged in the first piston head, the screw rod matched with the inner thread groove is arranged at the end part of the second piston head, and the screw rod is in threaded connection with the inner thread groove through the external thread of the screw rod; therefore, the first piston head and the second piston head can be detachably connected through matching connection of threads, the rigidity of integral connection of the first piston head and the second piston head is met, and the convenience of detachable functions between the first piston head and the second piston head is greatly improved.

3. The utility model discloses in, be provided with the gasket groove at the tip that second piston head and first piston head are connected to be provided with sealed the pad at the gasket groove, can strengthen the whole gliding leakproofness in the cylinder body of second piston head and first piston head, and be convenient for maintain sealed removing of filling up.

4. The utility model discloses in, still be provided with the oil circuit groove of intercommunication at the lateral wall of first piston head, and will oil circuit groove sets up along the lateral wall journey wave line form of first piston head, through the setting to oil circuit groove, can improve the oil storage effect of hydraulic fluid, can continuously provide the supply of the hydraulic oil of the oil film between cylinder body inner wall sliding motion's first piston head and cylinder body inner wall for the formation of oil film is more lasting very stable.

5. The utility model discloses in, be provided with multiunit slot group at the lateral wall of second piston head, slot group is the cuboid groove including reverse first slot and the second slot that sets up, first slot and second slot, can ensure that the piston begins to be in hydraulic balance state all the time when reciprocating motion, ensure smooth and easy motion is realized in the slip of piston rod in the cylinder body.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic view of a piston head structure according to the present invention;

FIG. 2 is a schematic view of the structure of the piston head and the cylinder body;

fig. 3 is a schematic view of the connection structure between the sealing gasket and the second piston head according to the present invention.

In the drawing, 1-cylinder body, 2-piston head, 3-first piston head, 4-second piston head, 5-surfacing layer, 6-rotary groove, 7-oil pipe, 8-sealing groove, 9-sealing ring, 10-internal thread groove, 11-screw, 12-sealing gasket groove, 13-sealing gasket, 14-reinforcing ring groove, 15-reinforcing ring, 16-oil path groove, 17-groove group, 18-first groove and 19-second groove.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

A piston based on surface overlaying comprises a cylinder body 1 and a piston head 2 arranged inside the cylinder body 1, wherein the piston head 2 comprises a first piston head 3 and a second piston head 4 which are detachably connected, surfacing layers 5 are arranged on the surfaces of the first piston head 3 and the second piston head 4, a plurality of rotary grooves 6 are arranged on the rotary surface of the first piston head 3, the rotary grooves 6 are communicated with each other through a plurality of oil pipes 7 arranged in the first piston head 3, a sealing groove 8 is arranged at the connecting position of the first piston head 3 and the second piston head 4, and a sealing ring 9 is arranged in the sealing groove 8; the piston head 2 is composed of the first piston head 3 and the second piston head 4 which are detachably connected, so that the convenience of the later maintenance and cleaning operation of the piston head 2 can be improved, and the sealing groove 8 can be conveniently separated by the separated first piston head 3 and the separated second piston head 4, so that the sealing ring 9 can be conveniently detached from the sealing groove 8 for maintenance; because the plurality of rotary grooves 6 are formed in the rotary surface of the first piston head 3, and the plurality of rotary grooves 6 are communicated with each other through the plurality of oil pipes 7 arranged in the first piston head 3, the reciprocating motion state of the first piston head 3 in the cylinder body 1 can be enhanced, and hydraulic oil can permeate in the rotary grooves 6 through the oil pipes 7 to form an oil film with uniformity and continuity, so that the contact between the first piston head 3 and the inner wall of the cylinder body 1 is reduced, and the effect of being not easy to clamp or lock is enhanced; furthermore, the hardness of the first piston head 3 and the second piston head 4 after heat treatment is HB 230-285, so that the piston has stable organizational performance, the hardness is improved, the piston after heat treatment is subjected to rough machining, fine machining size allowances are reserved for the outer circle, the inner diameter and the length to form a piston blank, the size of a minimum overlaying layer is ensured, the two sides of the overlaying layer form oblique edges, and undercut is prevented from being formed in the overlaying process.

An internal thread groove 10 is formed in one end, connected with the first piston head 3, of the second piston head 4, and a screw rod 11 matched with the internal thread groove 10 is arranged at one end, connected with the first piston head 3, of the second piston head 4; by arranging the internally threaded groove 10 inside the first piston head 3 and arranging the screw rod 11 matched with the internally threaded groove 10 at the end part of the second piston head 4; the screw is in threaded connection with the internal thread groove through the external thread of the screw; therefore, the first piston head 3 and the second piston head 4 can be detachably connected through matching connection of threads, the rigidity of the integral connection of the first piston head 3 and the second piston head 4 is met, and the convenience of the detachable function between the first piston head 3 and the second piston head 4 is greatly improved.

The end part of the second piston head 4 connected with the first piston head 3 is provided with a sealing gasket groove 12, and the sealing gasket groove 12 is provided with a sealing gasket 13; the sealing gasket groove 12 is arranged at the end part of the second piston head 4 connected with the first piston head 3, and the sealing gasket 13 is arranged in the sealing gasket groove 12, so that the sealing performance of the second piston head 4 and the first piston head 3 integrally sliding in the cylinder body 1 can be enhanced, and the removal and maintenance of the sealing gasket 13 are facilitated.

The side wall of the sealing ring 9 is provided with a reinforcing ring groove 14, and a reinforcing ring 15 is arranged inside the reinforcing ring groove 14.

A plurality of oil pipes 7 are uniformly distributed along the circumferential direction of the first piston head 3.

The side wall of the first piston head 3 is also provided with a communicated oil channel groove 16, and the oil channel groove 16 is arranged along the side wall of the first piston head 3 in a wavy manner; the side wall of the first piston head 3 is further provided with a communicated oil channel groove 16, the oil channel groove 16 is arranged in a wave-shaped manner along the side wall of the first piston head 3, the oil storage effect of hydraulic liquid can be improved through arrangement of the oil channel groove 16, the supply of hydraulic oil of an oil film between the first piston head 3 and the inner wall of the cylinder body 1 in sliding motion on the inner wall of the cylinder body 1 can be continuously provided, and the oil film is formed more stably and durably.

The side wall of the second piston head 4 is provided with a plurality of groove groups 17, the groove groups 17 comprise first grooves 18 and second grooves 19 which are arranged in opposite directions, and the first grooves 18 and the second grooves 19 are both rectangular grooves; the side wall of the second piston head 4 is provided with a plurality of groove groups 17, each groove group 17 comprises a first groove 18 and a second groove 19 which are arranged in opposite directions, and the first groove 18 and the second groove 19 are both rectangular grooves, so that the piston can be ensured to be always in a hydraulic balance state during reciprocating motion, and the smooth motion of the piston rod in the cylinder body 1 can be ensured.

The surfacing layer 5 is made of tin bronze material; the hardness of tin bronze on the surface of the piston is lower than that of the cylinder barrel, and a support ring is not needed on the piston, so that strain on the inner wall of the cylinder barrel is reduced.

The utility model discloses a theory of operation and working process:

in the utility model, the piston head 2 is composed of the first piston head 3 and the second piston head 4 which are detachably connected, so that the convenience of the later maintenance and cleaning operation of the piston head 2 can be improved, and the sealing groove 8 can be conveniently separated by the separated first piston head 3 and the separated second piston head 4, so that the sealing ring 9 can be conveniently detached and maintained from the sealing groove 8; because the plurality of rotary grooves 6 are formed in the rotary surface of the first piston head 3, and the plurality of rotary grooves 6 are communicated with each other through the plurality of oil pipes 7 arranged in the first piston head 3, the reciprocating motion state of the first piston head 3 in the cylinder body 1 can be enhanced, and hydraulic oil can permeate in the rotary grooves 6 through the oil pipes 7 to form an oil film with uniformity and continuity, so that the contact between the first piston head 3 and the inner wall of the cylinder body 1 is reduced, and the effect of being not easy to clamp or lock is enhanced; by arranging the internally threaded groove 10 inside the first piston head 3 and arranging the screw rod 11 matched with the internally threaded groove 10 at the end part of the second piston head 4; therefore, the first piston head 3 and the second piston head 4 are detachably connected through matching connection of threads, the rigidity of integral connection of the first piston head 3 and the second piston head 4 is met, and the convenience of detachable function between the first piston head 3 and the second piston head 4 is greatly improved; the side wall of the first piston head 3 is further provided with a communicated oil channel groove 16, the oil channel groove 16 is arranged in a wave-shaped manner along the side wall of the first piston head 3, the oil storage effect of hydraulic liquid can be improved through arrangement of the oil channel groove 16, the supply of hydraulic oil of an oil film between the first piston head 3 and the inner wall of the cylinder body 1 in sliding motion on the inner wall of the cylinder body 1 can be continuously provided, and the oil film is formed more stably and durably.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a piston based on surfacing, includes cylinder body (1), sets up piston head (2) inside cylinder body (1), its characterized in that: piston head (2) are including dismantling first piston head (3) and second piston head (4) of connection, the surface of first piston head (3) and second piston head (4) all is provided with surfacing layer (5), the surface of gyration of first piston head (3) is provided with a plurality of gyration grooves (6), and is a plurality of communicate through a plurality of oil pipe (7) that set up in first piston head (3) between gyration groove (6), the position that first piston head (3) and second piston head (4) are connected is provided with seal groove (8), is provided with sealing ring (9) in seal groove (8).

2. A piston based on hardfacing according to claim 1, wherein: an inner threaded groove (10) is formed in one end, connected with the second piston head (4), of the first piston head (3), and a screw (11) matched with the inner threaded groove (10) is arranged at one end, connected with the first piston head (3), of the second piston head (4).

3. A piston based on hardfacing according to claim 2, wherein: the end part of the second piston head (4) connected with the first piston head (3) is provided with a sealing gasket groove (12), and the sealing gasket groove (12) is provided with a sealing gasket (13).

4. A piston based on hardfacing according to claim 3, wherein: the side wall of sealing ring (9) is provided with reinforcement annular groove (14), reinforcement annular groove (14) inside is provided with reinforcement ring (15).

5. A piston based on hardfacing according to any one of claims 1-4, wherein: a plurality of oil pipes (7) are uniformly distributed along the circumferential direction of the first piston head (3).

6. A piston based on hardfacing according to claim 5, wherein: the side wall of the first piston head (3) is also provided with a communicated oil path groove (16), and the oil path groove (16) is arranged along the side wall of the first piston head (3) in a wavy manner.

7. A piston based on hardfacing according to claim 6, wherein: the side wall of the second piston head (4) is provided with a plurality of groove groups (17), the groove groups (17) comprise first grooves (18) and second grooves (19) which are arranged in a reverse mode, and the first grooves (18) and the second grooves (19) are cuboid grooves.

8. A piston based on hardfacing according to claim 7, wherein: the surfacing layer (5) is made of tin bronze material.