CN219119768U - Piston structure of hydraulic cylinder - Google Patents

Abstract

The utility model discloses a piston structure of a hydraulic cylinder. The main points of the technical scheme are as follows: a piston main body installed on a piston rod, a sealing groove is opened on the outer circumference surface of the piston main body, and a sealing ring is set inside the sealing groove. A locating ring is arranged in the sealing groove, and the locating ring is fixed on the main body of the piston and fitted on the sealing ring; both sides of the sealing groove are symmetrically provided with first mounting grooves, two The first installation grooves are all set on the circumferential surface of the piston body, and an anti-wear ring is installed in the first installation grooves to reduce the deformation of the sealing ring and ensure the stability of the sealing ring in the sealing groove. The anti-fouling ring is used in combination with the sealing ring and the anti-wear ring to prevent the oil in the hydraulic cylinder from being damaged due to foreign impurities, ensuring a long service life of the sealing ring, and avoiding damage, increasing the life of the hydraulic cylinder.

Description

Piston structure of hydraulic cylinder

technical field

The utility model relates to the technical field of hydraulic cylinder pistons, in particular to a piston structure of a hydraulic cylinder.

Background technique

A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swing motion). It has simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the movement is stable. Therefore, it is widely used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is related to the effective area of the piston and the pressure difference on both sides. Proportional; hydraulic cylinder is basically composed of cylinder and cylinder head, piston and piston rod, sealing device, buffer device and exhaust device.

In the prior art, most of the pistons of hydraulic cylinders use a single set of sealing rings, and hydraulic oil with average oil quality is used, which will easily cause the sealing rings on the piston to wear and deform after a certain period of time, and increase the sealing capacity. Due to the wear condition of the ring, the generated waste is easy to adhere to the cylinder wall. After long-term reciprocating movement, it is easy to cause damage to the circumferential surface of the piston and the cylinder wall, reduce the sealing performance, and affect the life of the hydraulic cylinder.

Utility model content

Aiming at the problems mentioned in the background technology, the purpose of this utility model is to provide a piston structure of a hydraulic cylinder to solve the problems mentioned in the background technology.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions:

The piston structure of the hydraulic cylinder includes a piston main body installed on the piston rod. A sealing groove is opened on the outer circumference of the piston main body. A sealing ring is set in the sealing groove, and a positioning ring is arranged in the sealing groove. The locating ring is fixed on the piston main body, and is engaged and installed on the sealing ring;

Both sides of the sealing groove are symmetrically provided with first installation grooves, and the two first installation grooves are opened on the circumferential surface of the piston body, and an anti-wear ring is installed in the first installation groove. One side of the first installation groove is provided with a second installation groove, and the second installation groove is opened on the circumferential surface of the piston main body, and an anti-fouling ring is installed inside.

By adopting the above technical scheme, a positioning ring is provided in the sealing groove provided on the main body of the piston, which facilitates the snapping and positioning of the sealing ring installed in the sealing groove, reduces the deformation of the sealing ring, and ensures the position of the sealing ring in the sealing groove Stability, the first installation groove on both sides of the piston body facilitates the installation of the anti-wear ring. The anti-wear ring provides guidance and support between the piston rod and the piston body, and absorbs radial loads, while preventing the hydraulic cylinder from moving parts The metal contact between them can absorb and attenuate mechanical vibration and improve the wear resistance of the piston body. The second installation groove on both sides of the piston body is convenient for installing the anti-fouling ring. The anti-fouling ring is combined with the sealing ring and the anti-wear ring. Using it can prevent the oil in the hydraulic cylinder from being mixed with foreign impurities to cause damage to the sealing ring, ensure a long service life of the sealing ring, and avoid damage to the circumferential surface of the piston body and the cylinder wall, thereby improving the life of the hydraulic cylinder.

Preferably, both sides of the first installation groove and the sealing groove are provided with rounded corners.

By adopting the above technical solution, the rounded corners formed on both sides of the first installation groove and the sealing groove facilitate the reduction of wear on the anti-friction ring and the sealing ring during installation.

Preferably, the positioning ring is integrally formed with the piston body, a positioning groove is formed on the inner wall of the sealing ring, and the positioning ring is snapped and installed in the positioning groove.

By adopting the above technical solution, the positioning ring and the main body of the piston are integrally formed, which improves the overall structural strength of the positioning ring, facilitates engaging in the positioning groove of the sealing ring, and improves the stability of the sealing ring installation.

Preferably, one side of the piston body is provided with a limiting slot, and the other side is provided with a resisting groove, and the end of the piston rod is inserted into the limiting slot.

By adopting the above technical solution, the piston rod can be accurately inserted on the piston main body through the limit slot.

Preferably, a nut is threadedly connected to the end of the piston rod, and one end of the nut is abutted in the abutting groove.

By adopting the above technical scheme, the nut is threadedly connected to the piston rod to facilitate the fixing of the piston main body, and the stop groove provided on the piston main body matches the lower end of the nut, thereby improving the installation accuracy of the nut.

Preferably, a rubber buffer sleeve is installed between the piston rod and the piston body.

By adopting the above technical solution, the installed rubber buffer sleeve is beneficial to improve the impact resistance between the piston rod and the piston main body.

Preferably, the antifouling ring is a polytetrafluoroethylene antifouling ring.

By adopting the above technical solution, the polytetrafluoroethylene antifouling ring has the characteristics of high temperature resistance and extremely low friction coefficient, which can block stains and improve the protection performance of the sealing ring.

In summary, the utility model mainly has the following beneficial effects:

First, in the piston structure of the hydraulic cylinder, a positioning ring is set in the sealing groove opened on the main body of the piston, which is convenient for snapping and positioning the sealing ring installed in the sealing groove, reduces the deformation of the sealing ring, and ensures the sealing ring Position stability in the sealing groove;

Second, in the piston structure of the hydraulic cylinder, the first installation grooves on both sides of the piston body facilitate the installation of the anti-wear ring. The anti-wear ring provides guidance and support between the piston rod and the piston body, and absorbs radial loads At the same time, it can prevent metal contact between the moving parts of the hydraulic cylinder, absorb and attenuate mechanical vibration, and improve the wear resistance of the piston body. The second installation groove on both sides of the piston body is convenient for installing the anti-fouling ring. Used in combination with the sealing ring and anti-wear ring, it can prevent the oil in the hydraulic cylinder from being damaged due to external impurities, ensure a long service life of the sealing ring, and avoid damage to the circumferential surface of the piston body and the cylinder wall. Increase the life of the hydraulic cylinder.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural sectional view of the utility model;

Fig. 3 is a partial enlarged view of A in Fig. 2 .

Reference signs: 1. Piston main body; 2. Piston rod; 3. Sealing groove; 4. Sealing ring; 5. Positioning ring; 6. First installation groove; 7. Anti-wear ring; 8. Second installation groove; 9 1. Antifouling ring; 10. Fillet; 11. Positioning groove; 12. Limiting slot; 13. Rubber buffer sleeve; 14. Resisting groove; 15. Nut.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1-Fig. 3, the piston structure of the hydraulic cylinder includes the piston body 1 installed on the piston rod 2, the outer circumference surface of the piston body 1 is provided with a sealing groove 3, and the sealing ring 4 is set inside the sealing groove 3, and the sealing groove 3 is provided with a positioning ring 5, the positioning ring 5 is fixed on the piston main body 1, and is snap-fitted and installed on the sealing ring 4;

Both sides of the seal groove 3 are symmetrically provided with first installation grooves 6, and the two first installation grooves 6 are all opened on the circumferential surface of the piston body 1. An anti-wear ring 7 is installed in the first installation groove 6, and the first installation groove One side of the piston 6 is provided with a second mounting groove 8, which is opened on the circumferential surface of the piston body 1, and an anti-fouling ring 9 is installed inside.

Referring to Figure 3, rounded corners 10 are provided on both sides of the first installation groove 6 and the sealing groove 3, and the rounded corners 10 provided on both sides of the first installation groove 6 and the sealing groove 3 are convenient for reducing the wear resistance ring during installation. 7 and the wear of the sealing ring 4.

Referring to Fig. 2, the positioning ring 5 and the piston main body 1 are integrally formed, the inner wall of the sealing ring 4 is provided with a positioning groove 11, the positioning ring 5 is snapped and installed in the positioning groove 11, and the positioning ring 5 and the piston main body 1 are integrally formed The structure improves the overall structural strength of the positioning ring 5, and is conveniently engaged in the positioning groove 11 of the sealing ring 4, thereby improving the stability of the sealing ring 4 installation.

Referring to Fig. 2, one side of the piston main body 1 is provided with a limiting slot 12, and the other side is provided with a stopper groove 14, the end of the piston rod 2 is inserted into the limiting slot 12, and passes through the limiting slot 12. It is convenient for the piston rod 2 to be accurately inserted on the piston main body 1 .

Referring to Fig. 1 and Fig. 2, the end of the piston rod 2 is threadedly connected with a nut 15, and one end of the nut 15 is abutted in the abutting groove 14, and is threadedly connected with the piston rod 2 through the nut 15, so as to facilitate the fixing of the piston main body 1, and the piston The resisting groove 14 provided on the main body 1 matches the lower end of the nut 15 to improve the installation accuracy of the nut 15 .

Referring to Fig. 1 and Fig. 2, a rubber buffer sleeve 13 is installed between the piston rod 2 and the piston body 1, and the installed rubber buffer sleeve 13 is beneficial to improve the impact resistance between the piston rod 2 and the piston body 1.

Referring to Figures 1 and 2, the anti-fouling ring 9 is a polytetrafluoroethylene anti-fouling ring. The polytetrafluoroethylene anti-fouling ring has the characteristics of high temperature resistance and a very low coefficient of friction, which can block stains and improve the protection of the sealing ring 4. performance.

Principles of use and advantages:

When the piston structure of the hydraulic cylinder is in use, a positioning ring 5 is provided in the sealing groove 3 opened on the piston main body 1, and the sealing ring 4 installed in the sealing groove 3 is engaged and positioned to reduce the friction generated by the sealing ring 4. deformation, to ensure the stability of the sealing ring 4 in the sealing groove 3, the first installation groove 6 opened on both sides of the piston body 1 is used to install the anti-wear ring 7, and the anti-wear ring 7 provides guidance between the piston rod 2 and the piston body 1 And support, and absorb radial load, at the same time can prevent the metal contact between the moving parts of the hydraulic cylinder, can absorb and attenuate mechanical vibration, improve the wear resistance of the piston body 1, the second installation groove opened on both sides of the piston body 1 8 Install the anti-fouling ring 9, the anti-fouling ring 9 is used in combination with the sealing ring 4 and the anti-wear ring 7, which can prevent the oil in the hydraulic cylinder from being mixed with external impurities and cause damage to the sealing ring 4, and ensure that the sealing ring 4 has a relatively Long service life, and avoid damage to the peripheral surface of the piston main body 1 and the cylinder wall, so as to improve the service life of the hydraulic cylinder.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes and modifications can be made to these embodiments without departing from the principle and spirit of the present invention , replacements and modifications, the scope of the present utility model is defined by the appended claims and their equivalents.

Claims (7)

1. Piston structure of pneumatic cylinder, including piston main part (1) of installing on piston rod (2), its characterized in that: a sealing groove (3) is formed in the circumferential outer surface of the piston main body (1), a sealing ring (4) is sleeved in the sealing groove (3), a positioning ring (5) is arranged in the sealing groove (3), and the positioning ring (5) is fixed on the piston main body (1) and is mounted on the sealing ring (4) in a clamping manner;

the two sides of the sealing groove (3) are symmetrically provided with first mounting grooves (6), the two first mounting grooves (6) are formed in the circumferential surface of the piston main body (1), an anti-wear ring (7) is arranged in the first mounting grooves (6), one side of each first mounting groove (6) is provided with a second mounting groove (8), the second mounting grooves (8) are formed in the circumferential surface of the piston main body (1), and an anti-fouling ring (9) is arranged in the second mounting grooves.

2. The piston structure of a hydraulic cylinder according to claim 1, characterized in that: and round corners (10) are arranged on two sides of the first mounting groove (6) and the sealing groove (3).

3. The piston structure of a hydraulic cylinder according to claim 1, characterized in that: the positioning ring (5) and the piston main body (1) are of an integrated structure, a positioning groove (11) is formed in the inner wall of the sealing ring (4), and the positioning ring (5) is clamped and installed in the positioning groove (11).

4. The piston structure of a hydraulic cylinder according to claim 1, characterized in that: one side of the piston main body (1) is provided with a limiting slot (12), the other side is provided with a stopping slot (14), and the end part of the piston rod (2) is inserted into the limiting slot (12).

5. The piston structure of a hydraulic cylinder according to claim 4, characterized in that: the end part of the piston rod (2) is in threaded connection with a nut (15), and one end of the nut (15) is abutted in the abutting groove (14).

6. The piston structure of a hydraulic cylinder according to claim 1, characterized in that: a rubber buffer sleeve (13) is arranged between the piston rod (2) and the piston main body (1).

7. The piston structure of a hydraulic cylinder according to claim 1, characterized in that: the antifouling ring (9) is a polytetrafluoroethylene antifouling ring.

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