CN210531303U

CN210531303U - Hydraulic cylinder top cap and oil cylinder connecting structure

Info

Publication number: CN210531303U
Application number: CN201921549910.XU
Authority: CN
Inventors: 龙良鑫
Original assignee: Luzhou Changhe Hydraulic Machinery Co ltd
Current assignee: Luzhou Changhe Hydraulic Machinery Co ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-15
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses a hydraulic cylinder top cover and cylinder connecting structure, which comprises a cylinder body, a top cover arranged at the top end of the cylinder body and a piston rod penetrating through the cylinder body, wherein the top end of the piston rod penetrates through the top cover and extends to the outside; a plurality of vertical screw rods are fixedly arranged on the bottom wall surface of the top cover positioned on the outer side of the cylinder body, and the screw rods are uniformly distributed along the circumferential direction of the top cover; the lower part of the screw is sleeved with a fixing component, the fixing component is fixed on the outer side wall of the upper part of the cylinder body, and the fixing component is matched with the screw to fix the top cover on the top end of the cylinder body; the fixed subassembly includes fixed cover, upper fixed disk, lower fixed disk, a plurality of pinion and drive ring. The utility model discloses a hydraulic cylinder top cap has advantages such as the installation is convenient, factor of safety is high, long service life, practicality are strong with hydro-cylinder connection structure.

Description

Hydraulic cylinder top cap and oil cylinder connecting structure

Technical Field

The utility model relates to a hydraulic cylinder field, concretely relates to hydraulic cylinder top cap and hydro-cylinder connection structure.

Background

The hydraulic cylinder plays an important role in hydraulic equipment, mainly comprises an end cover, a cylinder barrel, a piston assembly, a sealing piece and the like, and the principle of the hydraulic cylinder is to convert hydraulic energy into mechanical energy so as to realize linear reciprocating motion or swinging motion of the piston assembly. It has the advantages of simple structure, stable movement and the like.

For the connection structure between the top cover of the hydraulic oil cylinder and the oil cylinder, the hydraulic oil cylinders used in the existing market are usually connected by adopting flange type, thread type and other connection modes. In practical application, the hydraulic oil cylinder needs to be periodically checked or the sealing ring needs to be replaced, the hydraulic oil cylinder needs to be disassembled, and the hydraulic oil cylinder is assembled after the checking work is finished. Since both the flange type and the screw type are fixed by using bolts or screws, although the screws are tightened during assembly, some screws are in a pseudo-fastened state due to the difference in frictional resistance depending on the roughness of the joint surface of the screws. In this state, the stress of the screw of the hydraulic cylinder after working is uneven, so that the screw fails and is damaged, and the oil cylinder leaks and other faults occur, thereby affecting the normal work and the service life of the equipment. And, the mode of adopting the screw fixation still has the loaded down with trivial details defect of installation.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic cylinder top cap and hydro-cylinder connection structure with advantages such as the installation is convenient, factor of safety is high, long service life.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: a hydraulic cylinder top cover and cylinder connecting structure comprises a cylinder body, a top cover arranged at the top end of the cylinder body and a piston rod penetrating the cylinder body, wherein the top end of the piston rod penetrates through the top cover and extends to the outer side; a plurality of vertical screw rods are fixedly arranged on the bottom wall surface of the top cover positioned on the outer side of the cylinder body, and the screw rods are uniformly distributed along the circumferential direction of the top cover; the lower part of the screw is sleeved with a fixing component, the fixing component is fixed on the outer side wall of the upper part of the cylinder body, and the fixing component is matched with the screw to fix the top cover on the top end of the cylinder body;

the fixing assembly comprises a fixing sleeve fixed on the outer side wall of the cylinder body, an annular upper fixing disc and an annular lower fixing disc are respectively arranged at the upper end and the lower end of the fixing sleeve, a plurality of groups of positioning holes are correspondingly arranged on the upper fixing disc and the lower fixing disc, a pinion is coaxially arranged between each group of opposite positioning holes, the pinion is composed of a wheel body and a section of positioning column positioned at the upper end and the lower end of the wheel body, and a threaded central hole vertically penetrating through the pinion is formed in the pinion; the positioning column penetrates through the positioning hole and is in running fit with the positioning hole, and the screw rod penetrates through the threaded central hole and is in threaded fit with the pinion;

the periphery of the plurality of pinions is also provided with a driving ring, the width of the driving ring is matched with the distance between the upper fixing disc and the lower fixing disc, and the driving ring is clamped between the upper fixing disc and the lower fixing disc; and a gear ring meshed with the pinion is arranged on the inner wall of the driving ring.

Further, wear to be equipped with in the cylinder body the uide bushing, the top of uide bushing is fixed on the top cap bottom surface, the uide bushing is still established on the piston rod, be equipped with first sealing washer on the lateral wall of uide bushing, the uide bushing is kept away from the one end of top cap and is equipped with the second sealing washer on the wall that the piston rod contacted.

Furthermore, the guide sleeve is of a circular truncated cone structure.

Furthermore, a dustproof ring is arranged on the wall surface of the top end of the cover body, which is in contact with the piston rod.

Furthermore, a plurality of handles are arranged on the outer side wall of the driving ring.

The beneficial effects of the utility model are concentrated and are embodied in: the utility model discloses a hydraulic cylinder top cap has advantages such as the installation is convenient, factor of safety is high, long service life, practicality are strong with hydro-cylinder connection structure. Specifically, a plurality of vertical screw rods are uniformly fixed on the bottom wall surface of the top cover along the circumferential direction, each screw rod is in threaded fit with a pinion in the fixing assembly, a user drives each pinion to rotate simultaneously by screwing a driving ring, and the user does not need to sequentially screw each bolt; because the thread central hole of the pinion is matched with the threads of the screw rods, each screw rod can move downwards or upwards simultaneously, and the top cover and the cylinder body can be quickly fixed or detached. And because the moving distance of each screw is consistent, the pressure between the top cover and the cylinder body is uniform, and the leakage of the hydraulic cylinder caused by uneven stress is avoided.

Drawings

FIG. 1 is a schematic view of the whole structure of the hydraulic cylinder of the present invention;

FIG. 2 is a view of the structure of FIG. 1 taken along line A-A;

FIG. 3 is a sectional view of the portion B of FIG. 1;

fig. 4 is a schematic view of the connection between the top cover and the internal structure of the cylinder body.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a hydraulic cylinder top cover and cylinder connecting structure comprises a cylinder body 1, a top cover 2 arranged at the top end of the cylinder body 1, and a piston rod 3 arranged in the cylinder body 1 in a penetrating manner, wherein the top end of the piston rod 3 penetrates through the top cover 2 and extends to the outside; in order to facilitate the fixation between the top cover 2 and the cylinder body 1, four vertical screws 4 are fixedly arranged on the bottom surface of the top cover 2 positioned on the outer side of the cylinder body 1, in the embodiment, the top ends of the screws 4 can be directly welded on the wall surface of the bottom of the top cover 2, and the screws 4 are uniformly distributed along the circumferential direction of the top cover 2; the lower part cover of screw rod 4 is equipped with fixed subassembly, fixed subassembly is fixed on the lateral wall on cylinder body 1 upper portion, fixed subassembly with the cooperation of screw rod 4 is fixed top 2 at cylinder body 1's top.

As shown in fig. 2 and 3, the fixing assembly comprises a fixing sleeve 5 fixed on the outer side of the cylinder body 1, and the fixing sleeve 5 can be fixed on the outer side wall of the cylinder body 1 by welding or by bolts and screws;

the upper end and the lower end of the fixed sleeve 5 are fixedly connected with an annular upper fixed disk 6 and an annular lower fixed disk 7 respectively in a welding mode, four groups of positioning holes are correspondingly arranged on the upper fixed disk 6 and the lower fixed disk 7, and eight positioning holes are formed in total; a pinion 8 is coaxially arranged between each group of opposite positioning holes, correspondingly, the number of the pinions 8 is four, and each screw rod 4 can be inserted into the corresponding pinion 8; in order to position the pinion 8, the pinion 8 consists of a wheel body and a section of positioning column 9 positioned at the upper end and the lower end of the wheel body, and a threaded central hole vertically penetrating through the pinion 8 is formed in the pinion 8; the positioning column 9 penetrates through the positioning hole and is in running fit with the positioning hole, and the screw rod 4 penetrates through the threaded central hole and is in threaded fit with the pinion 8;

in order to make the four pinions 8 rotate simultaneously in the embodiment, a driving ring 10 is further arranged on the periphery of the four pinions 8, the width of the driving ring 10 is matched with the distance between the upper fixing disk 6 and the lower fixing disk 7, and the driving ring is clamped between the upper fixing disk 6 and the lower fixing disk 7; the drive ring 10 is provided on its inner wall with a ring gear which meshes with the pinion 8. The user can rotate the driving ring 10 to drive the four pinions 8 to rotate at the same time, the thread center holes of the pinions 8 are matched with the threads between the screws, and then the four screws 4 move up or down at the same time, and finally the top cover 2 is fixed with the opening surface of the cylinder body 1. And, because the circumference of the driving ring 10 is larger than the circumference of the pinion 8, the utility model also has the advantage of labor saving.

Further, in order to facilitate the rotation of the driving ring 10, a plurality of handles are arranged on the outer side wall of the driving ring 10, and each handle may be a connecting column, in this embodiment, two connecting columns may be adopted, which are symmetrically arranged on the driving ring 10 and fixed on the side wall of the driving ring 10 in a fixed connection manner, or a nut is arranged on the side wall of the driving ring 10, and the connecting columns are connected with the nut through threads; when in use, the two connecting columns are pushed and pulled, so that the driving ring 10 is more labor-saving and convenient to rotate.

As shown in fig. 4, in order to provide good sealing performance between the head cover 2 and the cylinder body 1, a guide sleeve 11 is fixedly arranged on the bottom wall surface of the head cover 2 located inside the cylinder body 1, and the guide sleeve 11 is arranged inside the cylinder body 1 in a penetrating manner; in other words, wear to be equipped with in the cylinder body 1 the uide bushing 11, the top of uide bushing 11 is fixed on the wall of top cap 2 bottom, uide bushing 11 is still established on piston rod 3, be equipped with first shape sealing washer 12 on the lateral wall of uide bushing 11, be equipped with second sealing washer 13 on the wall that the one end of uide bushing 11 keeping away from top cap 2 and piston rod 3 contacted, preferably, first sealing washer 12 and second sealing washer 13 all adopt the O shape sealing washer.

Further, the guide sleeve 11 may be a circular truncated cone structure, or may be formed by three portions, i.e., a large cylinder at the top, a circular truncated cone at the middle, and a small cylinder at the lower, wherein the diameter of the large cylinder is the same as that of the upper end of the circular truncated cone, and the diameter of the small cylinder is the same as that of the lower end of the circular truncated cone.

Furthermore, in order to prevent impurities such as dust from entering the hydraulic cylinder, a dust ring 14 is arranged on the wall surface of the top end of the top cover 2, which is in contact with the piston rod 3.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims

1. A hydraulic cylinder top cover and oil cylinder connecting structure comprises a cylinder body (1), a top cover (2) arranged at the top end of the cylinder body (1) and a piston rod (3) arranged in the cylinder body (1) in a penetrating mode, wherein the top end of the piston rod (3) penetrates through the top cover (2) and extends to the outer side; the method is characterized in that: a plurality of vertical screws (4) are fixedly arranged on the bottom wall surface of the top cover (2) positioned on the outer side of the cylinder body (1), and the screws (4) are uniformly distributed along the circumferential direction of the top cover (2); the lower part of the screw rod (4) is sleeved with a fixing component, the fixing component is fixed on the outer side wall of the upper part of the cylinder body (1), and the fixing component is matched with the screw rod (4) to fix the top cover (2) at the top end of the cylinder body (1);

the fixing assembly comprises a fixing sleeve (5) fixed on the outer side wall of the cylinder body (1), the upper end and the lower end of the fixing sleeve (5) are respectively provided with an annular upper fixing disc (6) and an annular lower fixing disc (7), a plurality of groups of positioning holes are correspondingly arranged on the upper fixing disc (6) and the lower fixing disc (7), a pinion (8) is coaxially arranged between each group of opposite positioning holes, each pinion (8) consists of a wheel body and a section of positioning column (9) located at the upper end and the lower end of the wheel body, and a threaded center hole vertically penetrating through the pinion (8) is formed in the pinion (8); the positioning column (9) penetrates through the positioning hole and is in running fit with the positioning hole, and the screw rod (4) penetrates through the threaded central hole and is in threaded fit with the pinion (8);

a driving ring (10) is further arranged on the periphery of the plurality of pinions (8), the width of the driving ring (10) is matched with the distance between the upper fixing disc (6) and the lower fixing disc (7), and the driving ring is clamped between the upper fixing disc (6) and the lower fixing disc (7); the inner wall of the driving ring (10) is provided with a gear ring meshed with the pinion (8).

2. The hydraulic cylinder head cover and cylinder connecting structure according to claim 1, characterized in that: wear to be equipped with uide bushing (11) in cylinder body (1), the top of uide bushing (11) is fixed on top cap (2) bottom surface, uide bushing (11) is still established on piston rod (3) cover, be equipped with first sealing washer (12) on the lateral wall of uide bushing (11), be equipped with second sealing washer (13) on the wall that one end that top cap (2) were kept away from in uide bushing (11) and piston rod (3) contacted.

3. The hydraulic cylinder head cover and cylinder connecting structure according to claim 2, characterized in that: the guide sleeve (11) is of a circular truncated cone structure.

4. The hydraulic cylinder head cover and cylinder connecting structure according to claim 1, characterized in that: and a dustproof ring (14) is arranged on the wall surface of the top end of the top cover (2) which is contacted with the piston rod (3).

5. The hydraulic cylinder head cover and cylinder connecting structure according to claim 1, characterized in that: the outer side wall of the driving ring (10) is provided with a plurality of handles.