CN216554715U

CN216554715U - Hydraulic cylinder piston rod and rear end cover mounting structure

Info

Publication number: CN216554715U
Application number: CN202123351783.2U
Authority: CN
Inventors: 铁进; 李永明; 王祥伟
Original assignee: Loudi Liansheng Machinery Co ltd
Current assignee: Loudi Liansheng Machinery Co ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-05-17
Anticipated expiration: 2031-12-29

Abstract

The utility model discloses a mounting structure of a piston rod and a rear end cover of a hydraulic oil cylinder, and relates to the technical field of hydraulic oil cylinders. The utility model relates to a mounting structure of a piston rod and a rear end cover of a hydraulic oil cylinder, which can limit the piston rod by arranging an anti-rotation component so as to prevent the piston rod from rotating under the action of the rear end cover.

Description

Hydraulic cylinder piston rod and rear end cover mounting structure

Technical Field

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a mounting structure for a piston rod and a rear end cover of a hydraulic oil cylinder.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device.

Adopt interference fit between hydraulic cylinder's on the existing market piston rod installation section and the rear end cap to make can not the displacement rotate between the two, however, in actual course of working, because reasons such as long-term use rear mechanism wearing and tearing lead to still can produce relative rotation phenomenon between the two easily, thereby lead to hydraulic cylinder's damage, influence the normal operating of mechanism, for this reason, now provide a hydraulic cylinder piston rod and rear end cap mounting structure.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a mounting structure for a piston rod and a rear end cover of a hydraulic oil cylinder, which can effectively solve the problem that in the actual processing process of the existing hydraulic oil cylinder in the background art, the relative rotation phenomenon is easily generated between the piston rod and the rear end cover due to the reasons of long-term use, such as mechanism abrasion and the like, so that the hydraulic oil cylinder is damaged and the normal operation of the mechanism is influenced.

In order to achieve the purpose, the utility model adopts the technical scheme that: a mounting structure for a piston rod and a rear end cover of a hydraulic oil cylinder comprises an oil cylinder barrel, a front cover and a rear cover which are arranged at two ends of the oil cylinder barrel, and a piston rod arranged in the oil cylinder barrel, wherein an anti-rotation assembly is arranged between the piston rod and the rear cover;

the anti-rotation assembly comprises a positioning block, a fixing screw rod, a stop block, a clamping block and a spring, the positioning block is fixedly connected with the top of the rear cover, the fixing screw rod is fixedly connected with the bottom end of the piston rod, the stop block is in threaded connection with the fixing screw rod, the positioning groove matched with the stop block is formed in the top of the positioning block, the placing groove is formed in the side face of the stop block, one end of the spring is fixedly connected with the inner wall of the placing groove, the clamping block is fixedly connected with the other end of the spring, a clamping groove matched with the clamping block is formed in the side wall of the positioning groove, and the piston rod and the rear cover can be prevented from rotating relatively.

Preferably, the side wall of the positioning groove is provided with a sliding groove matched with the clamping block, the sliding groove is used for the clamping block to slide, and the clamping block can move freely in the sliding groove.

Preferably, the side fixedly connected with stopper of dog, the spacing groove with stopper looks adaptation is seted up to the inner wall of hydro-cylinder, is convenient for carry on spacingly to the piston rod, prevents to rotate.

Preferably, the fixture blocks and the spring form an integral structure with two groups, and the fixture blocks and the spring are symmetrically distributed along the vertical central axis of the piston rod, so that the two sides of the piston rod are synchronously limited.

Preferably, the top of locating piece is provided with first sealing washer, the inside through-hole that begins for having with dog looks adaptation of first sealing washer can improve the leakproofness between dog and the locating piece.

Preferably, the outer surface of the piston rod is movably provided with a movable plug, the outer surface of the movable plug is tightly attached to the inner wall of the oil cylinder, and the whole device can work conveniently.

Preferably, the outer surface of the piston rod is provided with a second sealing ring, the inner wall of the movable plug is provided with a groove matched with the second sealing plug, and liquid can be prevented from leaking from a gap between the movable plug and the piston rod.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, through the arrangement of the anti-rotation assembly, the limiting block on the piston rod is firstly clamped with the limiting groove, then the front cover and the rear cover are fixed with the oil cylinder barrel through the bolts, so that the piston rod can vertically slide into the positioning groove under the action of the limiting block when moving to the positioning block on the rear cover, then the clamping block on the limiting block slides in the sliding groove, the spring is in a compression state at the moment, the clamping block can tightly abut against the inner wall of the sliding groove under the reset action of the spring, the piston rod can be further limited and prevented from rotating, and through the arrangement of the clamping groove, the piston rod can be fixed when the piston rod moves to the lowest end, so that the hydraulic oil cylinder can be protected, and the service life of the hydraulic oil cylinder can be prolonged.

Drawings

FIG. 1 is a perspective view of the overall structure of a mounting structure of a piston rod and a rear end cover of a hydraulic cylinder according to the present invention;

FIG. 2 is a front sectional view of a mounting structure for a piston rod and a rear end cover of a hydraulic cylinder according to the present invention;

FIG. 3 is an enlarged view of a structure A in the installation structure diagram 2 of a piston rod and a rear end cover of a hydraulic cylinder according to the present invention;

FIG. 4 is an enlarged view of a structure B in the installation structure diagram of a piston rod and a rear end cover of a hydraulic cylinder in the utility model 2;

fig. 5 is an enlarged view of a structure at a position C in a mounting structure diagram 2 of a piston rod and a rear end cover of a hydraulic oil cylinder according to the present invention.

In the figure: 1. an oil cylinder barrel; 2. a front cover; 3. a rear cover; 4. a piston rod; 5. positioning blocks; 6. fixing the screw rod; 7. a stopper; 8. a clamping block; 9. a spring; 10. a chute; 11. a limiting block; 12. a limiting groove; 13. a first seal ring; 14. a movable plug; 15. a second seal ring; 16. a clamping groove.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

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 a fixed connection, a detachable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the present invention is a mounting structure for a piston rod and a rear end cover of a hydraulic cylinder, including an oil cylinder barrel 1, a front cover 2 and a rear cover 3 disposed at two ends of the oil cylinder barrel 1, and a piston rod 4 disposed inside the oil cylinder barrel 1, wherein an anti-rotation component is disposed between the piston rod 4 and the rear cover 3;

prevent that the rotation component includes locating piece 5, clamping screw 6, dog 7, fixture block 8 and spring 9, locating piece 5 and back lid 3's top fixed connection, clamping screw 6 and piston rod 4's bottom fixed connection, dog 7 and 6 threaded connection of clamping screw, the constant head tank with dog 7 looks adaptation is seted up at the top of locating piece 5, the standing groove has been seted up to the side of dog 7, spring 9's one end and standing groove inner wall fixed connection, fixture block 8 and spring 9's other end fixed connection, the draw-in groove 16 with fixture block 8 looks adaptation is seted up to the lateral wall of constant head tank, can prevent to take place relative rotation between piston rod 4 and the back lid 3.

The lateral wall of constant head tank is seted up the spout 10 with fixture block 8 looks adaptation, and spout 10 is used for fixture block 8 to slide, and the fixture block 8 of being convenient for can freely move about in spout 10.

The side fixedly connected with stopper 11 of dog 7, the spacing groove 12 with stopper 11 looks adaptation is seted up to the inner wall of hydro-cylinder, is convenient for carry on spacingly to piston rod 4, prevents to rotate.

The fixture blocks 8 and the spring 9 form an integral structure which is divided into two groups and symmetrically distributed along the vertical central axis of the piston rod 4, so that the two sides of the piston rod 4 can be synchronously limited.

The top of locating piece 5 is provided with first sealing washer 13, and first sealing washer 13 is inside to begin to be had with the through-hole of dog 7 looks adaptation, can improve the leakproofness between dog 7 and the locating piece 5.

The outer surface of the piston rod 4 is movably provided with a movable plug 14, and the outer surface of the movable plug 14 is tightly attached to the inner wall of the oil cylinder, so that the whole device can work conveniently.

The outer surface of the piston rod 4 is provided with a second sealing ring 15, the inner wall of the movable plug 14 is provided with a groove matched with a second sealing plug, and liquid can be prevented from leaking from a gap between the movable plug 14 and the piston rod 4.

The working principle of the utility model is as follows: when using, at first, with stopper 11 and spacing groove 12 looks block on the piston rod 4, later, go on fixing protecgulum 2 and back lid 3 with oil cylinder 1 through the bolt, make piston rod 4 when removing the locating piece 5 on the back lid 3, can be inside the vertical slip constant head tank under stopper 11's effect, fixture block 8 on dog 7 slides inside spout 10 afterwards, spring 9 is in compression state this moment, under spring 9's reset action, can make fixture block 8 support tight spout 10 inner wall, thereby can further carry on spacingly to piston rod 4, prevent that it from taking place to rotate.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a hydraulic cylinder piston rod and rear end cap mounting structure, includes oil cylinder section (1), sets up protecgulum (2) and back lid (3) at oil cylinder section (1) both ends and sets up piston rod (4) in oil cylinder section (1) inside, its characterized in that: an anti-rotation component is arranged between the piston rod (4) and the rear cover (3);

the anti-rotation assembly comprises a positioning block (5), a fixing screw rod (6), a stop block (7), a clamping block (8) and a spring (9), the positioning block (5) is fixedly connected with the top of the rear cover (3), the fixing screw rod (6) is fixedly connected with the bottom end of the piston rod (4), the stop block (7) is in threaded connection with the fixing screw rod (6), the positioning groove matched with the stop block (7) is formed in the top of the positioning block (5), the placing groove is formed in the side face of the stop block (7), one end of the spring (9) is fixedly connected with the inner wall of the placing groove, the clamping block (8) is fixedly connected with the other end of the spring (9), and a clamping groove (16) matched with the clamping block (8) is formed in the side wall of the positioning groove.

2. The hydraulic cylinder piston rod and rear end cover mounting structure according to claim 1, characterized in that: the side wall of the positioning groove is provided with a sliding groove (10) matched with the clamping block (8), and the sliding groove (10) is used for the clamping block (8) to slide.

3. The hydraulic cylinder piston rod and rear end cover mounting structure according to claim 1, characterized in that: the side fixedly connected with stopper (11) of dog (7), spacing groove (12) with stopper (11) looks adaptation are seted up to the inner wall of hydro-cylinder.

4. The hydraulic cylinder piston rod and rear end cover mounting structure according to claim 1, characterized in that: the clamping blocks (8) and the springs (9) form an integral structure which is divided into two groups, and the clamping blocks and the springs are symmetrically distributed along the vertical central axis of the piston rod (4).

5. The hydraulic cylinder piston rod and rear end cover mounting structure according to claim 1, characterized in that: the top of locating piece (5) is provided with first sealing washer (13), first sealing washer (13) inside begins to be had with dog (7) looks adaptation's through-hole.

6. The hydraulic cylinder piston rod and rear end cover mounting structure according to claim 1, characterized in that: the outer surface of the piston rod (4) is movably provided with a movable plug (14), and the outer surface of the movable plug (14) is tightly attached to the inner wall of the oil cylinder.

7. The hydraulic cylinder piston rod and rear end cover mounting structure of claim 6, wherein: and a second sealing ring (15) is arranged on the outer surface of the piston rod (4), and a groove matched with the second sealing plug is formed in the inner wall of the movable plug (14).