Hydraulic oil cylinder

Abstract

The utility model discloses a hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinder accessories, and comprises a cylinder body, a guide sleeve body arranged at the upper part in the cylinder body, a piston rod inserted into the guide sleeve body, and a cylinder cover arranged at the top end of the cylinder body, the guide sleeve body comprises an upper guide sleeve, a connecting guide sleeve and a lower guide sleeve; the outer diameter of the connecting guide sleeve is smaller than that of the upper guide sleeve, the guide sleeve is arranged at the bottom of the upper guide sleeve, a guide groove matched with the connecting guide sleeve is formed in the top of the lower guide sleeve, and the connecting guide sleeve is inserted into the guide groove. An upper positioning sleeve and a lower positioning sleeve are arranged on the outer wall of the joint of the upper guide sleeve and the lower guide sleeve respectively, sealing gasket grooves are formed in the joint of the upper guide sleeve and the lower guide sleeve and the joint of the upper positioning sleeve and the lower positioning sleeve, and sealing sleeves are arranged in the sealing gasket grooves; the guide sleeve body is convenient to disassemble and assemble, good in protection performance and higher in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder accessory technical field, concretely is a kind of hydraulic cylinder. BACKGROUND

[0002] Hydraulic cylinder is a kind of actuating mechanism in hydraulic cylinder hydraulic system, generally by cylinder, cylinder rod (piston rod) and sealing component are composed, cylinder interior is divided into two parts by piston, two parts are communicated with one oil hole respectively, and hydraulic system structure is simple, and reliable in operation, it has been widely used in the hydraulic system of machine tool, when assembling hydraulic cylinder and piston, it needs to be guided with guide sleeve, to play corresponding guide and sealing effect;

[0003] But this guide sleeve in prior art still has the problems such as inconvenient disassembly in actual use process, and it can generate greater abrasion in long time use process, so that the connection between piston rod is loose, then it needs to consume more time to disassemble and replace, and the working efficiency is lower. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of hydraulic cylinder, so that guide sleeve body is convenient to disassemble, and the protection performance is good, and practicality is higher.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of hydraulic cylinder, including cylinder, the guide sleeve body being located at the inside upper portion of the cylinder, the piston rod being inserted in the guide sleeve body, the cylinder cover being arranged at the top end of the cylinder;The guide sleeve body includes upper guide sleeve, connecting guide sleeve, lower guide sleeve;The outer diameter of the connecting guide sleeve is less than the outer diameter of the upper guide sleeve, the guide sleeve is arranged at the bottom of the upper guide sleeve, the lower guide sleeve top is provided with the guide groove that is compatible with the connecting guide sleeve, and the connecting guide sleeve is inserted in the guide groove;Upper locating sleeve and lower locating sleeve are respectively arranged on the outer wall of the intersection of the upper guide sleeve and the lower guide sleeve, and the intersection of the upper guide sleeve and the lower guide sleeve, the intersection of upper locating sleeve and lower locating sleeve is provided with sealing washer groove, and sealing sleeve is arranged in the sealing washer groove;The top of the upper guide sleeve is provided with sealing washer seat, and the inner wall of the cylinder is provided with the limiting groove that is compatible with upper locating sleeve, lower locating sleeve and sealing washer seat;Upper locating sleeve, lower locating sleeve and sealing washer seat are located in the limiting groove;The bottom of the cylinder cover is provided with the first recess of annular shape, and the first recess is provided with the first washer that is fixedly connected with the top of the sealing washer seat.

[0006] In order to improve the sealing effect of sealing sleeve, as a kind of hydraulic cylinder of the utility model, the second recess of annular shape is symmetrically provided on the upper and lower sides of the sealing washer groove, the second recess is provided with the second washer, and the opposite sides of the two second washers are fixedly connected with the sealing sleeve.

[0007] In order to avoid the upper guide sleeve to rotate, and the lower guide sleeve wear and tear, as a kind of hydraulic cylinder preferred by the utility model, the guide groove inside bottom is provided with clamping block, the connecting guide sleeve bottom is provided with the clamping groove compatible with clamping block, the clamping block is inserted in the clamping groove.

[0008] In order to improve the wear resistance of guide sleeve, as a kind of hydraulic cylinder preferred by the utility model, the inner wall of the upper guide sleeve, connecting guide sleeve and lower guide sleeve is provided with wear-resistant layer.

[0009] In order to improve the sealing of the cylinder cover, as a kind of hydraulic cylinder preferred by the utility model, the inside of the cylinder cover is built-in reinforced sealing ring, and the bottom of the reinforced sealing ring is attached to the top of the sealing pad seat.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] The utility model discloses the connecting guide sleeve of upper guide sleeve bottom is placed in the guide groove of lower guide sleeve, and the sealing pad seat is placed in the top of upper guide sleeve, makes sealing pad seat, upper positioning sleeve, lower positioning sleeve from top to bottom in turn in limit groove, easy to guide sleeve body is quickly installed in the inside of cylinder body, makes guide sleeve body convenient to dismount, and the protection performance is good, and the practicality is higher, and the sealing effect of guide sleeve body is improved through sealing sleeve and sealing pad seat, certain anti-leakage effect is played, and the dust in the outside is avoided to fall into guide sleeve body. ACCURACY

[0012] Fig. 1 It is the structure schematic diagram of the utility model;

[0013] Fig. 2 It is the sectional structure schematic diagram of guide sleeve body of the utility model;

[0014] Fig. 3 It is the sectional structure schematic diagram of sealing sleeve of the utility model.

[0015] In the drawing: 1, cylinder body;2, piston rod;3, cylinder cover;4, upper guide sleeve;5, connecting guide sleeve;6, lower guide sleeve;7, guide groove;8, upper positioning sleeve;9, lower positioning sleeve;10, seal ring groove;11, sealing sleeve;12, sealing pad seat;13, limit groove;14, first recess;15, first washer;16, second recess;17, second washer;18, clamping block;19, clamping groove;20, wear-resistant layer;21, reinforced sealing ring. Specific implementation

[0016] Please refer to Figs. 1 to 3The utility model provides a hydraulic oil cylinder, including the cylinder body 1, the guide sleeve body that sets up the inside top of cylinder body 1, the piston rod 2 that inserts in the guide sleeve body, the cylinder cover 3 that sets up in the top of cylinder body 1, the guide sleeve body includes upper guide sleeve 4, connecting guide sleeve 5, lower guide sleeve 6, the outer diameter of connecting guide sleeve 5 is less than the outer diameter of upper guide sleeve 4, and the guide sleeve sets up in the bottom of upper guide sleeve 4, and the top of lower guide sleeve 6 is equipped with the guide groove 7 of adapting with connecting guide sleeve 5, and connecting guide sleeve 5 inserts in the guide groove 7, the outer wall of the junction of upper guide sleeve 4 and lower guide sleeve 6 is equipped with upper locating sleeve 8 and lower locating sleeve 9 respectively, and the junction of upper guide sleeve 4 and lower guide sleeve 6, upper locating sleeve 8 and lower locating sleeve 9 are equipped with the sealing washer groove 10, and the sealing sleeve 11 is arranged in sealing washer groove 10, and the top of upper guide sleeve 4 is equipped with sealing gasket seat 12, and the inner wall of cylinder body 1 is equipped with the limiting groove 13 of adapting with upper locating sleeve 8, lower locating sleeve 9, sealing gasket seat 12, upper locating sleeve 8, lower locating sleeve 9, sealing gasket seat 12 are all located in limiting groove 13, the bottom of cylinder cover 3 is equipped with the first recess 14 of annular shape, and the first washer 15 of fixed connection with the top of sealing gasket seat 12 is arranged in the first recess 14.

[0017] In the embodiment: the connecting guide sleeve 5 of the bottom of upper guide sleeve 4 is placed in the guide groove 7 of lower guide sleeve 6, the sealing sleeve 11 is placed in the sealing washer groove 10 between upper guide sleeve 4 and lower guide sleeve 6, and through the limiting groove 13, the upper locating sleeve 8 and the lower locating sleeve 9 are placed in the limiting groove 13, which is easy to quickly install the guide sleeve body in the inside of the cylinder body 1, and the sealing gasket seat 12 is placed on the top of the upper guide sleeve 4; the cylinder cover 3 is installed on the cylinder body 1 and the sealing gasket seat 12, the cylinder body 1 limits the sealing gasket seat 12, the upper guide sleeve 4 and the lower guide sleeve 6, and the sealing gasket seat 12 is easy to protect the upper guide sleeve 4 and the cylinder cover 3, prevent single-sided wear during use, improve the wear resistance of the guide sleeve body, avoid oil leakage; through the sealing sleeve 11, the sealing effect of the junction of the upper guide sleeve 4 and the lower guide sleeve 6 is improved, and through the first washer 15, the sealing effect between the cylinder cover 3 and the sealing gasket seat 12 is improved, thereby strengthening the sealing effect of the guide sleeve body, and the guide sleeve body is easy to quickly disassemble and assemble, and when wear occurs, the cylinder cover 3 is opened for quick disassembly and replacement.

[0018] As a technical optimization scheme of the utility model, the second recess 16 of annular shape is symmetrically arranged on the upper and lower sides of the sealing washer groove 10, the second washer 17 is arranged in the second recess 16, and the opposite sides of the two second washers 17 are fixedly connected with the sealing sleeve 11.

[0019] In the embodiment: through the second washer 17, the sealing effect between the upper guide sleeve 4 and the lower guide sleeve 6 is further improved.

[0020] As a technical optimization scheme of the utility model, the inside bottom of the guide groove 7 is provided with a clamping block 18, the bottom of the connecting guide sleeve 5 is provided with a clamping groove 19 matched with the clamping block 18, and the clamping block 18 is inserted into the clamping groove 19 in the guide groove 7.

[0021] In the embodiment, the clamping block 18 is clamped in the clamping groove 19, the connecting guide sleeve 5 is further limited, the upper guide sleeve 4 and the connecting guide sleeve 5 are prevented from rotating, and the wear of the connecting part of the upper guide sleeve 4, the connecting guide sleeve 5 and the lower guide sleeve 6 is prevented.

[0022] As a technical optimization scheme of the utility model, the inner walls of the upper guide sleeve 4, the connecting guide sleeve 5 and the lower guide sleeve 6 are all provided with wear-resistant layers 20.

[0023] In the embodiment, the wear-resistant layers 20 further reduce the wear between the piston rod 2 and the guide sleeve body.

[0024] As a technical optimization scheme of the utility model, the inside of the cylinder cover 3 is built-in with a reinforced sealing ring 21, and the bottom of the reinforced sealing ring 21 is attached to the top of the sealing gasket seat 12.

[0025] In the embodiment, the reinforced sealing ring 21 further strengthens the sealing effect of the inside of the cylinder cover 3, and prevents dust from entering the cylinder body 1 from the inner ring of the cylinder cover 3.

[0026] The working principle and use process of the utility model are as follows:

[0027] The connecting guide sleeve 5 at the bottom of the upper guide sleeve 4 is placed in the guide groove 7 of the lower guide sleeve 6, and the sealing sleeve 11 is placed in the gasket groove 10 between the upper guide sleeve 4 and the lower guide sleeve 6; and through the limiting groove 13, the upper positioning sleeve 8 and the lower positioning sleeve 9 are both placed in the limiting groove 13, which facilitates the quick installation of the guide sleeve body in the inside of the cylinder body 1, and the sealing gasket seat 12 is placed at the top of the upper guide sleeve 4; the cylinder cover 3 is installed on the cylinder body 1 and the sealing gasket seat 12, the cylinder body 1 limits the sealing gasket seat 12, the upper guide sleeve 4 and the lower guide sleeve 6, and the sealing gasket seat 12 is easy to protect the upper guide sleeve 4 and the cylinder cover 3, preventing single-sided wear during use, improving the wear resistance of the guide sleeve body, and preventing oil leakage; through the sealing sleeve 11, the sealing effect of the joint of the upper guide sleeve 4 and the lower guide sleeve 6 is improved, and through the first gasket 15, the sealing effect between the cylinder cover 3 and the sealing gasket seat 12 is improved, thereby strengthening the sealing effect of the guide sleeve body, and the guide sleeve body is easy to be quickly disassembled and assembled.

[0028] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A hydraulic cylinder, comprising a cylinder body (1), a guide sleeve body arranged above the inside of the cylinder body (1), a piston rod (2) inserted into the guide sleeve body, and a cylinder cover (3) arranged at the top end of the cylinder body (1); characterized in that: The guide sleeve body comprises an upper guide sleeve (4), a connecting guide sleeve (5), and a lower guide sleeve (6); the outer diameter of the connecting guide sleeve (5) is smaller than that of the upper guide sleeve (4), the connecting guide sleeve (5) is arranged at the bottom of the upper guide sleeve (4), a guide groove (7) compatible with the connecting guide sleeve (5) is formed at the top of the lower guide sleeve (6), and the connecting guide sleeve (5) is inserted into the guide groove (7); an upper positioning sleeve (8) and a lower positioning sleeve (9) are respectively arranged on the outer wall at the joint of the upper guide sleeve (4) and the lower guide sleeve (6), a sealing washer groove (10) is formed at the joint of the upper guide sleeve (4) and the lower guide sleeve (6), the joint of the upper positioning sleeve (8) and the lower positioning sleeve (9), a sealing sleeve (11) is arranged in the sealing washer groove (10), a sealing washer seat (12) is arranged at the top of the upper guide sleeve (4), and a limiting groove (13) compatible with the upper positioning sleeve (8), the lower positioning sleeve (9), and the sealing washer seat (12) is formed in the inner wall of the cylinder body (1); the upper positioning sleeve (8), the lower positioning sleeve (9), and the sealing washer seat (12) are all located in the limiting groove (13); a first groove (14) in the shape of a ring is formed at the bottom of the cylinder cover (3), and a first washer (15) fixedly connected to the top of the sealing washer seat (12) is arranged in the first groove (14).

2. A hydraulic ram as claimed in claim 1 wherein: Second grooves (16) in the shape of a ring are symmetrically formed on the upper and lower sides of the sealing washer groove (10), second washers (17) are arranged in the second grooves (16), and the opposite sides of the two second washers (17) are fixedly connected to the sealing sleeve (11).

3. The hydraulic cylinder of claim 1, wherein: A clamping block (18) is arranged at the inner bottom of the guide groove (7), a clamping groove (19) compatible with the clamping block (18) is formed at the bottom of the connecting guide sleeve (5), and the clamping block (18) is inserted into the clamping groove (19).

4. The hydraulic cylinder of claim 1, wherein: Wear-resistant layers (20) are arranged on the inner walls of the upper guide sleeve (4), the connecting guide sleeve (5), and the lower guide sleeve (6).

5. The hydraulic cylinder of claim 1, wherein: A reinforcing sealing ring (21) is arranged in the inner side of the cylinder cover (3), and the bottom of the reinforcing sealing ring (21) is attached to the top of the sealing washer seat (12).

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