Hydraulic cylinder structure without cylinder cover

Abstract

A hydraulic cylinder structure without a cylinder cover comprises a cylinder barrel, a piston rod and a sealing dustproof assembly which are matched with one another. A groove matched with the sealing dustproof assembly is formed in the inner wall of the cylinder barrel, the sealing dustproof assembly is installed in the groove of the cylinder barrel, the piston rod stretches into the cylinder barrel to guarantee that the piston rod achieves isolation and dust prevention of oil in a rod cavity from the outside through the sealing dustproof assembly on the cylinder barrel, and a groove of a sealing part accessory is directly formed in the rod cavity side of the cylinder barrel. The sealing dustproof assembly is installed on the cylinder barrel, and the piston rod achieves the effects of isolating oil in the rod cavity from the outside, preventing dust and the like through the sealing dustproof assembly on the oil cylinder barrel.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic cylinder technical field relates to a kind of design of hydraulic cylinder structure without cylinder cover, especially suitable for the structure of reducing hydraulic cylinder cost. BACKGROUND

[0002] For the single-acting cylinder with small difference between cylinder diameter and rod diameter, the oil cylinder rod cavity oil and the outside are isolated by the sealing package structure of conventional cylinder cover with sealing package. The structure is a general structure in the market, and the manufacturing process and cost of various oil cylinder manufacturers are not much different.

[0003] In the prior art, the structure is as shown in Figure 1 : including cylinder cover A, sealing package B, cylinder barrel C and piston rod D matched with each other;Wherein, the inner side of cylinder cover A is provided with groove A1 of each sealing part accessory, and dustproof ring B1, U-shaped ring B2, stellite seal B3 and support ring accessory B4 of sealing package B are mounted on the inner wall of cylinder cover;Cylinder cover A is provided with matching table A2 and groove A3 of sealing package B waterproof O-shaped ring B5, static seal O-shaped ring B6 and matched blocking ring B7 on the outer side, and the accessories of sealing package B waterproof O-shaped ring B5, static seal O-shaped ring B6 and matched blocking ring B7 are mounted on the cylinder cover (as Figure 1 );Cylinder cover A is provided with external thread, and the internal thread of rod cavity side of cylinder barrel C is fixed on cylinder barrel C by thread cooperation. The piston rod D realizes the isolation of rod cavity oil and the outside, dustproof and other effects through the sealing package B on the side of oil cylinder cover A. UTILITY MODEL CONTENTS

[0004] In view of the above problems of the prior art, the utility model aims at providing a kind of hydraulic cylinder structure without cylinder cover, groove of sealing part accessory is directly arranged on the rod cavity side of cylinder barrel, and sealing dustproof assembly is installed on the cylinder barrel, and the piston rod realizes the isolation of rod cavity oil and the outside, dustproof and other effects through the sealing dustproof assembly on the oil cylinder barrel.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of hydraulic cylinder structure without cylinder cover, including cylinder barrel, piston rod and sealing dustproof assembly matched with each other;Wherein, the inner wall of cylinder barrel is provided with groove matched with sealing dustproof assembly, sealing dustproof assembly is installed in the groove of cylinder barrel, and piston rod is inserted into cylinder barrel to ensure that piston rod realizes the isolation of rod cavity oil and the outside through the sealing dustproof assembly on cylinder barrel.

[0007] Further, the sealing dustproof assembly includes sealing part of U-shaped ring and blocking ring one, dustproof part of dustproof ring and blocking ring two, first support of support ring one and blocking ring three, and second support of support ring two and blocking ring four.

[0008] Further, a groove is formed on the outer end of the cylinder barrel, and the first support, the sealing member, the second support and the dustproof member are sequentially installed into the groove to ensure that the inner walls of the support ring one, the U-shaped ring, the support ring two and the dustproof ring are tightly attached to the outer wall of the piston rod.

[0009] Further, the stop ring one and the stop ring two are square section stop rings, and the stop ring three and the stop ring four are circular section stop rings.

[0010] By adopting the technical scheme, the utility model discloses a groove matched with the sealing and dustproof assembly is arranged on the rod cavity side of the cylinder barrel, and the sealing and dustproof assembly is installed on the cylinder barrel, and the piston rod is isolated from the outside and dustproof through the sealing package on the cylinder barrel of the oil cylinder.

[0011] The utility model is suitable for the oil cylinder with small difference between the cylinder diameter and the rod diameter, and has the advantages that: ① the oil cylinder cover is deleted, and the raw material cost, processing cost and management cost are reduced; ② the number of standard sealing members is reduced, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model is described in detail below with reference to the drawings:

[0013] Figure 1 It is the assembly structure schematic view of prior art of the utility model;

[0014] Figure 2 It is the assembly structure schematic view of the utility model. CONCRETE EMBODIMENT

[0015] The utility model is described in detail below with reference to the drawings and examples:

[0016] Figures 1-2 It is the embodiment of the utility model.

[0017] A hydraulic cylinder structure without cylinder cover comprises a cylinder barrel 1, a piston rod 2 and a sealing and dustproof assembly 3 matched with each other; wherein a groove 11 matched with the sealing and dustproof assembly is arranged on the inner wall of the cylinder barrel 1, the sealing and dustproof assembly 3 is installed into the groove 11 of the cylinder barrel 1, and the piston rod 2 is inserted into the cylinder barrel 11 to ensure that the piston rod 2 is isolated from the outside through the sealing and dustproof assembly 3 on the cylinder barrel.

[0018] In the specific embodiment, the sealing and dustproof assembly 3 comprises a sealing member 31 composed of a U-shaped ring 311 and a stop ring one 312, a dustproof member 32 composed of a dustproof ring 321 and a stop ring two 322, a first support 33 composed of a support ring one 331 and a stop ring three 332, and a second support 34 composed of a support ring two 341 and a stop ring four 342.

[0019] The groove 11 is formed on the outer end of the cylinder 1, and the first support 33, the sealing member 31, the second support 34 and the dustproof member 32 are sequentially installed into the groove to ensure that the inner walls of the support ring one 331, the U-shaped ring 311, the support ring two 341 and the dustproof ring 321 tightly adhere to the outer wall of the piston rod 2.

[0020] Further, the stop ring one 312 and the stop ring two 322 are square-section stop rings, and the stop ring three 332 and the stop ring four 342 are circular-section stop rings.

[0021] The utility model discloses a groove with sealing and dustproof assembly fittings is arranged on the rod cavity side of the cylinder, and the sealing and dustproof assembly is installed on the cylinder, and the piston rod realizes the isolation of the rod cavity oil and the outside, dustproof and other effects through the sealing package on the cylinder of the oil cylinder.

[0022] The utility model is suitable for the oil cylinder with small difference between the cylinder diameter and the rod diameter, and has the advantages that: 1, the four parts (cylinder body, piston rod, piston and cylinder cover) of the oil cylinder are reduced to three parts (cylinder body, piston rod and piston), and the cylinder cover is deleted, so that the raw material cost, processing cost and management cost are reduced; 2, the static seal and the waterproof ring at the matching position of the cylinder cover and the cylinder are reduced, so that the raw material cost, processing cost, assembly cost and management cost are reduced, and the market competition ability is improved.

[0023] The above description shows and describes the preferred embodiments of the utility model, and as stated above, the utility model is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed by the above teaching or related technology or knowledge within the scope of the utility model concept described herein. The changes and variations made by the person skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the protection scope of the claims attached to the utility model.

Claims

1. A hydraulic cylinder structure without a cylinder head, characterized by: The application relates to a cylinder-piston assembly, which comprises a cylinder, a piston rod and a sealing and dustproof assembly.

2. A hydraulic cylinder structure without a cylinder head according to claim 1, characterized in that: The sealing and dustproof assembly comprises a sealing part composed of a U-shaped ring and a first retainer ring, a dustproof part composed of a dustproof ring and a second retainer ring, a first support composed of a first support ring and a third retainer ring, and a second support composed of a second support ring and a fourth retainer ring.

3. A cylinder structure without cylinder cover according to claim 2, characterized in that: The cylinder is provided with a groove on the outer end, and the first support, the sealing part, the second support and the dustproof part are sequentially arranged in the groove to ensure that the inner wall of the first support ring, the U-shaped ring, the second support ring and the dustproof ring tightly adhere to the outer wall of the piston rod.

4. A hydraulic cylinder structure without a cylinder head according to claim 3, characterized in that: The first retainer ring and the second retainer ring are square-section retainer rings, and the third retainer ring and the fourth retainer ring are round-section retainer rings.

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