CN213684782U

CN213684782U - Hydraulic cylinder with built-in spring lock

Info

Publication number: CN213684782U
Application number: CN202022789675.2U
Authority: CN
Inventors: 樊青峰; 张振强
Original assignee: Shandong Guochuang Precision Machinery Co ltd
Current assignee: Shandong Guochuang Precision Machinery Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-07-13
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a hydraulic cylinder of built-in spring lock, including cylinder and check valve, the one end fixedly connected with check valve of cylinder, the other end fixedly connected with direction lid of cylinder, the inside of cylinder is provided with the piston, one side fixedly connected with piston rod of piston, the both sides of piston rod all are provided with the locking hole, the inside of direction lid is seted up flutedly, the inside of recess is provided with locking mechanism. The utility model discloses a setting of check valve avoids hydraulic cylinder oil leak phenomenon to appear in the use effectively, makes pressure supply stable high-efficient more to improved whole sealing performance effectively, stopped the emergence of hydraulic cylinder seepage phenomenon, thereby improved hydraulic cylinder's work efficiency, cooperation through locking mechanism and locking hole sets up, the situation that the piston rod contracts suddenly when having avoided hydraulic pressure leakage unbalance effectively, has improved the reliability of locking effectively.

Description

Hydraulic cylinder with built-in spring lock

Technical Field

The utility model relates to a hydraulic cylinder technical field specifically is a hydraulic cylinder of built-in spring lock.

Background

The hydraulic cylinder is an actuating element in a hydraulic transmission system, and is an energy conversion device for converting hydraulic energy into mechanical energy, the structural types of the hydraulic cylinder comprise a piston cylinder, a plunger cylinder and a swing cylinder, the piston cylinder and the plunger cylinder realize reciprocating linear motion, output speed and thrust, the swing cylinder realizes reciprocating swing and output angular speed and torque, the hydraulic cylinder can be used singly, or two or more hydraulic cylinders can be combined or combined with other mechanisms to finish special functions, the hydraulic cylinder has a simple structure and reliable operation, and is widely applied to a hydraulic system of a machine tool.

When the existing hydraulic oil cylinder is used, the oil cylinder is often required to be reliably locked at any output working position and to be kept at a fixed position for a long time, the known locking mode is ensured by various hydraulic locking circuits, the locking mode of the hydraulic locking circuits is inevitably leaked, and the locking reliability cannot be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic cylinder of built-in spring lock is in order to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hydraulic cylinder of built-in spring lock, includes cylinder and check valve, the one end fixedly connected with check valve of cylinder, the other end fixedly connected with direction lid of cylinder, the inside of cylinder is provided with the piston, one side fixedly connected with piston rod of piston, the both sides of piston rod all are provided with the locking hole, the inside of direction lid is seted up flutedly, the inside of recess is provided with locking mechanism.

Preferably, the check valve includes valve body, end cover, oil feed chamber, first spring, seal cover, ejector pin, first oil inlet, leads hydraulic fluid port and backward flow mouth, the equal fixedly connected with end cover in both ends of valve body, the oil feed chamber has been seted up to the inside of valve body, the inside fixed mounting in oil feed chamber has first spring, the seal cover has been cup jointed on the surface of first spring, and the tip that is the seal cover is provided with the ejector pin, one side of valve body sets up first oil inlet, the opposite side of valve body is provided with leads the hydraulic fluid port, the one end that one side of leading the hydraulic fluid port is located the ejector pin is provided with the backward flow mouth.

Preferably, the inner part of the cylinder barrel is provided with a sealing ring on the surface of the piston rod.

Preferably, one side of the surface of the cylinder barrel is fixedly connected with a second oil inlet, and the end part of the second oil inlet is provided with a first sealing plug.

Preferably, the locking mechanism comprises a second spring, a limiting sleeve and an arc-shaped clamping block, the second spring is fixedly mounted inside the groove, the limiting sleeve is sleeved on the surface of the second spring, and the arc-shaped clamping block is fixedly connected to the end of the limiting sleeve.

Preferably, the end parts of the first oil inlet and the return port are provided with second sealing plugs.

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

1. the utility model discloses a setting of check valve, pressure oil gets into behind the oil feed chamber, can extrude the seal cover, compress first spring simultaneously, make the seal cover produce the displacement, remove the restriction to leading hydraulic fluid port department, make pressure oil promote the piston rod through leading the hydraulic fluid port and produce thrust and remove and use, after the piston rod removes to the assigned position, stop the interpolation to pressure oil, and simultaneously, remove the pressure effect to seal cover and first spring, make seal cover and first spring reset, it is spacing to leading the hydraulic fluid port to seal once more, thereby avoid hydraulic cylinder oil leak phenomenon to appear in the use effectively, make pressure supply more stable high-efficient, and improved whole sealing performance effectively, hydraulic cylinder seepage phenomenon's emergence has been stopped, thereby improve hydraulic cylinder's work efficiency.

2. The utility model discloses a locking mechanism and locking hole's cooperation setting when the piston rod removes, can make tight stop collar in second spring top and arc fixture block, make the arc fixture block be in always and carry out the tight state in top to the piston rod, remove to the assigned position back when the piston rod, the arc fixture block can insert the inside in locking hole and carry on spacingly to go on further fixedly to the piston rod, the situation that the piston rod suddenly returns when having avoided hydraulic pressure to leak unbalance effectively, improved the reliability of locking effectively.

Drawings

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

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

fig. 3 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.

In the figure: 1. a cylinder barrel; 2. a one-way valve; 201. a valve body; 202. an end cap; 203. an oil inlet cavity; 204. a first spring; 205. sealing sleeves; 206. a top rod; 207. a first oil inlet; 208. an oil guide port; 209. a return port; 3. a guide cover; 4. a piston; 5. a piston rod; 6. a locking hole; 7. a groove; 8. a locking mechanism; 801. a second spring; 802. a limiting sleeve; 803. an arc-shaped fixture block; 9. a seal ring; 10. a second oil inlet; 11. a first sealing plug; 12. a second sealing plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; 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.

Referring to fig. 1-3, the present invention provides an embodiment: the utility model provides a hydraulic cylinder of built-in spring lock, including cylinder 1 and check valve 2, the one end fixedly connected with check valve 2 of cylinder 1, setting through check valve 2, avoid hydraulic cylinder oil leak phenomenon to appear in the use effectively, make pressure supply more stable high-efficient, thereby improve hydraulic cylinder's work efficiency, the other end fixedly connected with direction lid 3 of cylinder 1, the inside of cylinder 1 is provided with piston 4, one side fixedly connected with piston rod 5 of piston 4, the both sides of piston rod 5 all are provided with locking hole 6, recess 7 has been seted up to direction lid 3's inside, the inside of recess 7 is provided with locking mechanism 8, cooperation setting through locking mechanism 8 and locking hole 6, the situation that piston rod 5 contracts suddenly when having avoided hydraulic pressure to leak unbalance effectively, the reliability of locking has been improved effectively.

Further, the check valve 2 includes a valve body 201, an end cover 202, an oil inlet cavity 203, a first spring 204, a sealing sleeve 205, a push rod 206, a first oil inlet 207, an oil guide port 208 and a return port 209, both ends of the valve body 201 are fixedly connected with the end cover 202, the oil inlet cavity 203 is opened inside the valve body 201, the first spring 204 is fixedly installed inside the oil inlet cavity 203, the sealing sleeve 205 is sleeved on the surface of the first spring 204, the push rod 206 is arranged at the end of the sealing sleeve 205, the first oil inlet 207 is arranged at one side of the valve body 201, the oil guide port 208 is arranged at the other side of the valve body 201, the return port 209 is arranged at one end of the push rod 206 at one side of the oil guide port 208, when the device is used, the second 12 at the end of the first oil inlet 207 is firstly opened, then pressure oil is added through the first oil inlet 207, after the pressure oil enters the oil inlet cavity 203, the sealing sleeve 205 is displaced, the limitation on the oil guide port 208 is removed, pressure oil pushes the piston rod 5 through the oil guide port 208 to generate thrust to move for use, after the piston rod 5 moves to a designated position, the addition of the pressure oil is stopped, meanwhile, the pressure action on the sealing sleeve 205 and the first spring 204 is removed, the sealing sleeve 205 and the first spring 204 are reset, the oil guide port 208 is sealed and limited again, thereby effectively avoiding the oil leakage phenomenon of the hydraulic oil cylinder in the use process, ensuring that the pressure supply is more stable and efficient, improving the working efficiency of the hydraulic oil cylinder, when the piston rod 5 needs to be contracted into the cylinder barrel 1, the ejector rod 206 moves to extrude the sealing sleeve 205 and the first spring 204 by adding pressure to the return port 209, ensuring that the pressure oil in the cylinder barrel 1 flows back through the oil guide port 208, and further removing the pressure on the piston rod 5, enabling it to contract.

Further, the inside of the cylinder tube 1 at the surface of the piston rod 5 is provided with a seal ring 9, and leakage of hydraulic oil can be effectively prevented by the seal ring 9.

Further, one side of the surface of the cylinder barrel 1 is fixedly connected with a second oil inlet 10, the end part of the second oil inlet 10 is provided with a first sealing plug 11, pressure oil is added into the cylinder barrel 1 through a first oil inlet 207, so that the piston rod 5 is reversely compressed and retracted into the cylinder barrel 1, and impurities or air can be effectively prevented from entering the cylinder barrel 1 through the first sealing plug 11, so that hydraulic thrust imbalance is caused.

Further, locking mechanism 8 includes second spring 801, stop collar 802 and arc fixture block 803, the inside fixed mounting of recess 7 has second spring 801, stop collar 802 has been cup jointed on the surface of second spring 801, the tip fixedly connected with arc fixture block 803 of stop collar 802, when piston rod 5 removed, can make second spring 801 push up stop collar 802 and arc fixture block 803, make arc fixture block 803 be in always carrying out the state of pushing up tightly to piston rod 5, after piston rod 5 removed to the assigned position, arc fixture block 803 can insert the inside of locking hole 6 and carry out spacingly, thereby further fix piston rod 5, the situation that piston rod 5 suddenly retracted when having avoided hydraulic pressure to leak unbalance effectively, the reliability of locking has been improved effectively.

Further, the ends of the first oil inlet 207 and the return port 209 are both provided with a second sealing plug 12.

The working principle is as follows: when the device is used, the second sealing plug 12 at the end part of the first oil inlet 207 is opened, then pressure oil is added through the first oil inlet 207, after the pressure oil enters the oil inlet cavity 203, the sealing sleeve 205 is extruded, meanwhile, the first spring 204 is compressed, the sealing sleeve 205 is displaced, the limitation on the oil guide port 208 is removed, the pressure oil pushes the piston rod 5 to generate thrust movement through the oil guide port 208 for use, after the piston rod 5 moves to a designated position, the addition of the pressure oil is stopped, meanwhile, the pressure effect on the sealing sleeve 205 and the first spring 204 is removed, the sealing sleeve 205 and the first spring 204 are reset, the oil guide port 208 is sealed and limited again, thereby effectively avoiding the oil leakage phenomenon of the hydraulic oil cylinder in the use process, enabling the pressure supply to be more stable and efficient, when the piston rod 5 needs to be contracted to the inside of the cylinder barrel 1, by adding pressure to the oil return port 209, the push rod 206 is moved to extrude the sealing sleeve 205 and the first spring 204, pressure oil inside the cylinder barrel 1 flows back through the oil guide port 208, so that the pressure on the piston rod 5 is relieved, the piston rod can be contracted, the pressure oil is added into the cylinder barrel 1 through the first oil inlet 207, the piston rod 5 is enabled to perform reverse pressure retraction to the inside of the cylinder barrel 1, the locking mechanism 8 and the locking hole 6 are mutually matched, the situation that the piston rod 5 is suddenly retracted when hydraulic leakage is unbalanced is effectively avoided, and the locking reliability is effectively improved.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a hydraulic cylinder of built-in spring lock, includes cylinder (1) and check valve (2), its characterized in that: the one end fixedly connected with check valve (2) of cylinder (1), the other end fixedly connected with direction lid (3) of cylinder (1), the inside of cylinder (1) is provided with piston (4), one side fixedly connected with piston rod (5) of piston (4), the both sides of piston rod (5) all are provided with locking hole (6), the inside of direction lid (3) is seted up flutedly (7), the inside of recess (7) is provided with locking mechanism (8).

2. A hydraulic cylinder with built-in snap lock according to claim 1, characterized in that: the check valve (2) comprises a valve body (201), an end cover (202), an oil inlet cavity (203), a first spring (204), a sealing sleeve (205), a push rod (206), a first oil inlet (207), an oil guide port (208) and a return port (209), wherein the end covers (202) are fixedly connected to the two ends of the valve body (201), the oil inlet cavity (203) is formed in the valve body (201), the first spring (204) is fixedly mounted in the oil inlet cavity (203), the sealing sleeve (205) is sleeved on the surface of the first spring (204), the push rod (206) is arranged at the end part of the sealing sleeve (205), the first oil inlet (207) is arranged on one side of the valve body (201), the oil guide port (208) is arranged on the other side of the valve body (201), and the return port (209) is arranged at one end, located on the push rod (206), of one side of.

3. A hydraulic cylinder with built-in snap lock according to claim 1, characterized in that: and a sealing ring (9) is arranged on the surface of the piston rod (5) in the cylinder barrel (1).

4. A hydraulic cylinder with built-in snap lock according to claim 1, characterized in that: one side on cylinder (1) surface is fixedly connected with second oil inlet (10), the tip of second oil inlet (10) is provided with first sealing plug (11).

5. A hydraulic cylinder with built-in snap lock according to claim 1, characterized in that: locking mechanism (8) include second spring (801), stop collar (802) and arc fixture block (803), the inside fixed mounting of recess (7) has second spring (801), stop collar (802) have been cup jointed on the surface of second spring (801), the tip fixedly connected with arc fixture block (803) of stop collar (802).

6. A hydraulic cylinder with built-in snap lock according to claim 2, characterized in that: and the end parts of the first oil inlet (207) and the return port (209) are provided with second sealing plugs (12).