CN217842189U

CN217842189U - Plunger oil cylinder without plunger

Info

Publication number: CN217842189U
Application number: CN202221498041.4U
Authority: CN
Inventors: 李志红; 刘强强; 孔园园; 刘贵鑫; 杨民正; 郭晛; 周景华; 刘晨; 乔丽丽
Original assignee: Bengbu Yeli Machinery Co ltd
Current assignee: Bengbu Yeli Machinery Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-11-18
Anticipated expiration: 2032-06-15

Abstract

The utility model discloses a plunger hydro-cylinder of no plunger, the uide bushing is installed to the upper end of cylinder, and it has one end to pass the uide bushing and reach the outside plunger rod of cylinder to peg graft in the cylinder, and the one end lateral wall that the plunger rod is close to the cylinder bottom is inlayed and is had the retaining ring. According to the plunger oil cylinder without the plunger, the top of the cylinder barrel is tightly matched with the annular groove on the end face of the cylinder cover, and the concentricity of the plunger rod and the cylinder barrel can be well ensured, so that the plunger is not needed to be used for supporting, the processing precision of an inner hole of the cylinder barrel can be greatly reduced, and the production cost is reduced; according to the plunger oil cylinder without the plunger, when the plunger rod moves outwards and extends out, the steel wire check ring on the plunger rod is in contact with the annular groove on the thread section, so that the limiting effect is achieved, and the limiting reliability of the steel wire check ring is ensured; the plunger oil cylinder without the plunger cancels the installation of the plunger and the support ring, and has simple structure, simple installation and reliable performance; the precision requirement of the inner hole of the cylinder barrel is greatly reduced, and the manufacturing cost is greatly reduced.

Description

Plunger oil cylinder without plunger

Technical Field

The application relates to the technical field of plunger oil cylinders, in particular to a plunger oil cylinder without a plunger.

Background

The plunger oil cylinder is different from the piston oil cylinder in that the piston of the piston oil cylinder needs to be sealed, and the pistons of all the piston oil cylinders need to be ensured to be concentric with the inner hole of the cylinder barrel by support rings in order to ensure the sealing reliability.

With the increase of the market of the oil cylinder, the advantages of the plunger oil cylinder in performance and cost are more and more obvious, and the application of the plunger oil cylinder is more and more. The plunger of the plunger cylinder does not need to have the leakproofness, but the plunger of the plunger cylinder on the market still uses the support ring at present, because the use of support ring, its machining precision to cylinder and plunger is almost the same with the piston, and its manufacturing cost still is very high. Therefore, a plunger cylinder without a plunger is provided.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, it is an object of the present patent application to provide a plunger-less plunger cylinder that solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the plunger oil cylinder without the plunger comprises a cylinder barrel and a cylinder bottom arranged at the lower end of the cylinder barrel, wherein an oil inlet is formed in one side of the cylinder bottom, an oil outlet communicated with an inner cavity of the cylinder barrel is formed in the upper end of the cylinder bottom, a guide sleeve is arranged at the upper end of the cylinder barrel, a plunger rod with one end penetrating through the guide sleeve to reach the outside of the cylinder barrel is inserted in the cylinder barrel, and a check ring is embedded in the side wall of one end, close to the cylinder bottom, of the plunger rod.

Furthermore, the guide sleeve and the cylinder barrel are in threaded connection.

Furthermore, the top of the inner cavity of the cylinder barrel is provided with a thread groove, the guide sleeve comprises a thread section screwed into the thread groove, and one end of the thread section is connected with a cylinder cover abutting against the upper end face of the cylinder barrel.

Furthermore, the thread section and the cylinder cover are of an integrated structure, and through holes matched with the plunger rod are formed in the thread section and the cylinder cover.

Furthermore, the end face, close to the cylinder barrel, of the cylinder cover is provided with an annular groove with a trapezoidal cross section, and one end, close to the cylinder cover, of the cylinder barrel is of a conical surface structure matched with the annular groove.

Furthermore, the end face, far away from the cylinder cover, of the threaded section is provided with an annular groove used for limiting a check ring when the plunger rod extends outwards, and the section of the annular groove is of an arc-shaped structure matched with the check ring.

Furthermore, the check ring is a steel wire check ring.

Compared with the prior art, the beneficial effects of the utility model are that:

1. according to the plunger oil cylinder without the plunger, the top of the cylinder barrel is tightly matched with the annular groove on the end face of the cylinder cover, and the concentricity of the plunger rod and the cylinder barrel can be well ensured, so that the plunger is not needed to be used for supporting, the processing precision of an inner hole of the cylinder barrel can be greatly reduced, and the production cost is reduced;

2. according to the plunger oil cylinder without the plunger, when the plunger rod moves outwards and extends out, the steel wire check ring on the plunger rod is in contact with the annular groove on the thread section, so that the limiting effect is achieved, and the limiting reliability of the steel wire check ring is ensured;

3. the plunger oil cylinder without the plunger cancels the installation of the plunger and the support ring, and has simple structure, simple installation and reliable performance; the precision requirement of the inner hole of the cylinder barrel is greatly reduced, and the manufacturing cost is greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of part A of FIG. 1 according to the present invention;

fig. 3 is an enlarged schematic view of a portion B of fig. 1 according to the present invention.

The reference numbers indicate: the guide sleeve 1, the thread section 11, the annular groove 111, the cylinder cover 12, the annular groove 121, the cylinder barrel 2, the plunger rod 3, the retainer ring 4 and the cylinder bottom 5.

Detailed Description

The following embodiments of the present application are described by specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure of the present application. The present application is capable of other and different embodiments and its several details are capable of modifications and variations in various respects, all without departing from the spirit of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Referring to fig. 1-3, the present invention provides a technical solution:

a plunger oil cylinder without a plunger is disclosed, as shown in figure 1, and comprises a cylinder barrel 2 and a cylinder bottom 5 arranged at the lower end of the cylinder barrel 2, wherein an oil inlet is formed in one side of the cylinder bottom 5, an oil outlet communicated with an inner cavity of the cylinder barrel 2 is formed in the upper end of the cylinder bottom 5, a guide sleeve 1 is arranged at the upper end of the cylinder barrel 2, a plunger rod 3 with one end penetrating through the guide sleeve 1 and reaching the outside of the cylinder barrel 2 is inserted in the cylinder barrel 2, a retaining ring 4 is embedded in the side wall of one end, close to the cylinder bottom 5, of the plunger rod 3, and the retaining ring 4 is a steel wire retaining ring.

As shown in fig. 1, the mounting mode of uide bushing 1 and cylinder 2 is threaded connection, and is concrete, and the top of 2 inner chambers of cylinder is equipped with the thread groove, and uide bushing 1 includes the screw thread section 11 of a screw thread screw in thread groove, and the one end of screw thread section 11 is connected with the cylinder cap 12 that supports at 2 up end of cylinder, and screw thread section 11 and cylinder cap 12 be integrated structure, and integrated structure intensity is high, sets up the through-hole that matches with plunger rod 3 on screw thread section 11 and the cylinder cap 12.

Referring to fig. 1 and 2, an annular groove 121 with a trapezoidal cross section is formed in the end surface of the cylinder cover 12 close to the cylinder barrel 2, one end of the cylinder barrel 2 close to the cylinder cover 12 is of a conical surface structure matched with the annular groove 121, the top of the cylinder barrel 2 is tightly matched with the annular groove 121 in the end surface of the cylinder cover 12, and the concentricity of the plunger rod 3 and the cylinder barrel 2 can be well guaranteed, so that a plunger is not needed to be used for supporting, the processing precision of an inner hole of the cylinder barrel 2 can be greatly reduced, and the production cost is reduced; referring to fig. 1 and 3, an end surface of the threaded section 11, which is far away from the cylinder cover 12, is provided with an annular groove 111 for limiting the retainer ring 4 when the plunger rod 3 extends outwards, the cross section of the annular groove 111 is of an arc-shaped structure matched with the retainer ring 4, and when the plunger rod 3 moves outwards and extends, the steel wire retainer ring on the plunger rod 3 contacts the annular groove 111 on the threaded section 11, so that the limiting effect is achieved, and the reliability of the steel wire retainer ring limiting is ensured.

The plunger oil cylinder without the plunger cancels the installation of the plunger and the support ring, and has simple structure, simple installation and reliable performance; the precision requirement of the inner hole of the cylinder barrel 2 is greatly reduced, and the manufacturing cost is greatly reduced.

The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. The utility model provides a plunger hydro-cylinder of no plunger, includes cylinder (2) and installs cylinder bottom (5) at cylinder (2) lower extreme, and the oil inlet has been seted up to one side of cylinder bottom (5), and the oil-out that communicates with cylinder (2) inner chamber is seted up to the upper end of cylinder bottom (5), its characterized in that: the guide sleeve (1) is installed at the upper end of the cylinder barrel (2), a plunger rod (3) with one end penetrating through the guide sleeve (1) to reach the outside of the cylinder barrel (2) is inserted in the cylinder barrel (2), and a check ring (4) is embedded in the side wall of one end, close to the cylinder bottom (5), of the plunger rod (3).

2. The plunger-less ram cylinder of claim 1, wherein: the guide sleeve (1) and the cylinder barrel (2) are in threaded connection.

3. The plunger-less ram cylinder of claim 2, wherein: the top of cylinder (2) inner chamber is equipped with the thread groove, and uide bushing (1) includes screw thread section (11) in a screw thread screw in thread groove, and the one end of screw thread section (11) is connected with cylinder cap (12) of propping at cylinder (2) up end.

4. The plunger-less plunger cylinder of claim 3, wherein: the threaded section (11) and the cylinder cover (12) are of an integrated structure, and through holes matched with the plunger rod (3) are formed in the threaded section (11) and the cylinder cover (12).

5. The plunger-less ram cylinder of claim 3, wherein: the end face, close to the cylinder barrel (2), of the cylinder cover (12) is provided with an annular groove (121) with a trapezoidal section, and one end, close to the cylinder cover (12), of the cylinder barrel (2) is of a conical surface structure matched with the annular groove (121).

6. The plunger-less ram cylinder of claim 3, wherein: the end face, far away from the cylinder cover (12), of the threaded section (11) is provided with an annular groove (111) used for limiting the retainer ring (4) when the plunger rod (3) extends outwards, and the section of the annular groove (111) is of an arc-shaped structure matched with the retainer ring (4).

7. The plunger-less ram cylinder of claim 6, wherein: the retainer ring (4) is a steel wire retainer ring.