Wear-resistant nitrogen spring

Abstract

The utility model discloses a wear-resistant nitrogen spring in the related technical field of nitrogen springs, which comprises a main cylinder body and a piston rod, a valve seat is mounted below the main cylinder body, an air valve is mounted in the middle of the valve seat, a cylinder body key groove is processed on the inner wall of the main cylinder body, a piston plate is integrally arranged at the lower end of the piston rod, and a piston rod is mounted in the piston plate. A piston key groove is machined in the outer diameter of the piston plate in a penetrating mode, a limiting key is installed in the cylinder body key groove, a scale scraping ring is arranged at the position, matched with the piston rod, of the upper end of the main cylinder body, and a collecting groove of an arc-shaped structure is formed in the scale scraping ring. According to the nitrogen spring, the first cylinder body key groove is formed in the inner wall of the main cylinder body, the second piston key groove is formed in the piston plate, the limiting key is installed in the first cylinder body key groove, the limiting key and the second piston key groove are in sliding connection, effective limiting can be carried out in the lifting movement process of the piston rod, and the piston rod is prevented from rotating relative to the main cylinder body.

Description

Technical Field

[0001] The utility model belongs to the technical field related to nitrogen gas springs, and more specifically, it relates to wear-resistant nitrogen gas springs. Background Art

[0002] A nitrogen gas spring is a new type of elastic component with high-pressure nitrogen as the working medium. It has the advantages of small volume, large elastic force, long stroke, stable operation, precise manufacturing, long service life, gentle elastic force curve, and no need for pre-tightening during use, etc. It can easily achieve constant pressure and delay action in the system and is an ideal elastic component of a new generation with flexible performance. Nitrogen gas springs usually use piston rod guide sleeves and seals for sealing to ensure smooth movement of the piston rod in and out while preventing gas leakage. When the nitrogen gas spring is compressed, the internal pressure of the nitrogen gas spring is high. Under multiple high-intensity pressures, the sealing performance of the nitrogen gas spring will decline, easily causing gas leakage, weakening the buffering effect, and affecting the use. Since both the main cylinder body and the piston rod of the nitrogen gas spring are cylindrical structures, during actual use, relative rotation will occur between the piston rod and the main cylinder body, and the piston rod will receive radial shear force, posing a risk of piston rod fracture.

[0003] In view of this, the present utility model is specifically proposed. Summary of the Utility Model

[0004] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a wear-resistant nitrogen gas spring. To solve the above technical problems, the basic concept of the technical solution adopted by the present utility model is as follows:

[0005] The wear-resistant nitrogen gas spring includes a main cylinder body and a piston rod. A valve seat is installed below the main cylinder body, and a gas valve is installed at the middle position of the valve seat. A cylinder keyway is machined on the inner wall of the main cylinder body. A piston plate is integrally provided at the lower end of the piston rod, and a piston keyway is penetrated and machined on the outer diameter of the piston plate. A limit key is installed in the cylinder keyway. A scouring ring is provided at the mating position between the upper end of the main cylinder body and the piston rod. An arc-shaped collecting groove is provided on the scouring ring. A self-lubricating sealing ring is provided below the scouring ring. A guide sleeve I is provided below the self-lubricating sealing ring. A Y-shaped sealing ring is provided below the guide sleeve I. A guide sleeve II is provided below the Y-shaped sealing ring. A stop ring is provided on the inner wall of the main cylinder body, and a sealing ring sleeve is sleeved outside the stop ring. The sealing ring sleeve can effectively buffer the collision between the piston plate and the stop ring.

[0006] As a further solution of the present utility model: The sealing ring sleeve is a semi-surrounding structure. A mating protrusion is provided on the inner side of the sealing ring sleeve. Mating grooves are opened on the upper and lower surfaces of the stop ring. The position and specifications of the mating grooves correspond to those of the mating protrusion to ensure the stability of the installation of the sealing ring sleeve.

[0007] As a further solution of the utility model: the cylinder body keyway is symmetrically provided with two, the cylinder body keyway and the limit key are tightly fitted, and the limit key and the piston keyway are slidingly fitted, so that effective limiting is performed during the lifting and lowering movement of the piston rod.

[0008] As a further solution of the utility model: a sealing connection ring is provided at the upper position where the valve seat and the main cylinder body cooperate, a retaining ring is provided at the middle position, and a sealing ring is provided at the lower end position where the main cylinder body and the valve seat cooperate to ensure the stability of the valve seat installation.

[0009] As a further solution of the utility model: the surface of the piston rod is titanium-plated to enhance the corrosion resistance, surface hardness, high temperature resistance and wear resistance of the piston rod.

[0010] After adopting the above technical scheme, the utility model has the following beneficial effects compared with the prior art.

[0011] The nitrogen spring of the utility model is provided with a cylinder keyway 1 on the inner wall of the main cylinder body, and a piston keyway 2 is provided on the piston plate. A limit key is installed in the cylinder keyway 1, and a sliding connection is formed between the limit key and the piston keyway 2. During the lifting and lowering movement of the piston rod, effective limit can be performed to prevent the piston rod from rotating relative to the main cylinder body.

[0012] Two guide sleeves are arranged between the piston rod and the inner wall of the main cylinder body of the utility model, and a Y-shaped sealing ring is arranged between the two guide sleeves. When the pressure received by the nitrogen spring is greater, the relative deformation of the Y-shaped sealing ring is greater, and the overall sealing performance is better. In combination with the self-lubricating sealing ring and the sealing ring sleeve, it is ensured that the nitrogen spring as a whole has good pressure resistance and service life.

[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are part of this application and are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model, but do not constitute an improper limitation on the utility model. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is the front view of the utility model;

[0017] Figure 3 is a partial sectional view of the present utility model;

[0018] Figure 4 is a partially enlarged view of part A of the present utility model;

[0019] Figure 5 is a schematic diagram of the internal cooperation between the piston plate and the main cylinder block of the present utility model.

[0020] In the figure: 1, main cylinder block; 2, piston rod; 3, piston plate; 4, valve seat; 5, air valve; 6, sealing connection collar; 7, snap ring; 8, sealing ring; 9, limit key; 10, cylinder block keyway; 11, piston keyway; 12, scaling ring; 13, collection groove; 14, self-lubricating sealing ring; 15, guide sleeve one; 16, Y-shaped sealing ring; 17, guide sleeve two; 18, stop ring; 19, sealing ring sleeve; 20, mating groove; 21, mating protrusion.

[0021] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0023] As Figures 1 to 5 shown, the wear-resistant nitrogen spring includes a main cylinder block 1 and a piston rod 2. A valve seat 4 is installed below the main cylinder block 1, an air valve 5 is installed at the middle position of the valve seat 4, a cylinder block keyway 10 is machined on the inner wall of the main cylinder block 1, a piston plate 3 is integrally provided at the lower end of the piston rod 2, a piston keyway 11 is penetrated and machined on the outer diameter of the piston plate 3, a limit key 9 is installed in the cylinder block keyway 10, a scaling ring 12 is arranged at the mating position of the upper end of the main cylinder block 1 and the piston rod 2, an arc-shaped collection groove 13 is arranged on the scaling ring 12, a self-lubricating sealing ring 14 is arranged below the scaling ring 12, a guide sleeve one 15 is arranged below the self-lubricating sealing ring 14, a Y-shaped sealing ring 16 is arranged below the guide sleeve one 15, a guide sleeve two 17 is arranged below the Y-shaped sealing ring 16, a stop ring 18 is arranged on the inner wall of the main cylinder block 1, a sealing ring sleeve 19 is sleeved outside the stop ring 18, and the sealing ring sleeve 19 can effectively buffer the collision between the piston plate 3 and the stop ring 18.

[0024] Among them, the sealing ring sleeve 19 is of a semi-surrounding structure. A mating protrusion 21 is provided on the inner side of the sealing ring sleeve 19. Mating grooves 20 are formed on the upper and lower surfaces of the stop ring 18. The positions and specifications of the mating grooves 20 correspond to those of the mating protrusion 21 to ensure the stability of the installation of the sealing ring sleeve 19.

[0025] Two cylinder block keyways 10 are symmetrically arranged. There is an interference fit between the cylinder block keyway 10 and the limit key 9, and a sliding fit between the limit key 9 and the piston keyway 11 to perform effective limiting during the lifting and lowering movement of the piston rod 2.

[0026] A sealing connecting collar 6 is provided at the upper mating position between the valve seat 4 and the main cylinder block 1, a snap ring 7 is provided at the middle position, and a sealing ring 8 is provided at the lower mating position between the main cylinder block 1 and the valve seat 4 to ensure the stability of the installation of the valve seat 4.

[0027] The surface of the piston rod 2 is treated with titanium plating to enhance the corrosion resistance, surface hardness, high-temperature resistance and wear resistance of the piston rod 2.

[0028] The working principle of the present utility model is as follows: The surface of the piston rod 2 is treated with titanium plating to enhance its corrosion resistance, high-temperature resistance and wear resistance, especially suitable for mining equipment or other equipment with poor operating environments. The mining equipment is in an environment with a large amount of dust. The setting of the scraping plate scrapes off the dust adhering to the surface of the piston rod 2 during the lifting and lowering process of the piston rod 2, preventing the dust from entering the inside of the main cylinder block 1 and effectively protecting the nitrogen spring as a whole;

[0029] A limit key 9 is fixedly installed in the cylinder block keyway 10 of the nitrogen spring main cylinder block 1. When the piston rod 2 moves up and down, the piston keyway 11 formed on the piston plate 3 slides with the limit key 9 to ensure the stability of the lifting and lowering movement of the piston rod 2 and prevent the piston rod 2 from rotating relative to the main cylinder block 1;

[0030] The structure of the present utility model is reasonably designed and convenient for installation and use. The nitrogen spring is provided with a cylinder block keyway 10-1 on the inner wall of the main cylinder block 1 and a piston keyway 11-2 on the piston plate 3. A limit key 9 is installed in the cylinder block keyway 10-1, and there is a sliding connection between the limit key 9 and the piston keyway 11-2. During the lifting and lowering movement of the piston rod 2, effective limiting can be carried out to prevent the piston rod 2 from rotating relative to the main cylinder block 1. There are two guide sleeves between the piston rod 2 and the inner wall of the main cylinder block 1, and a Y-shaped sealing ring 16 is arranged between the two guide sleeves. When the pressure received by the nitrogen spring is greater, the relative deformation of the Y-shaped sealing ring 16 is greater and the overall sealing performance is better. In cooperation with the self-lubricating sealing ring 14 and the sealing ring sleeve 19, it is ensured that the nitrogen spring as a whole has good compressive capacity and service life.

[0031] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications using the technical content prompted above to obtain equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. Wear-resistant nitrogen spring, including a main cylinder block (1) and a piston rod (2), characterized in that, A valve seat (4) is installed below the main cylinder block (1), an air valve (5) is installed at the middle position of the valve seat (4), a cylinder block keyway (10) is machined on the inner wall of the main cylinder block (1), a piston plate (3) is integrally provided at the lower end of the piston rod (2), a piston keyway (11) is penetrated and machined on the outer diameter of the piston plate (3), a limit key (9) is installed in the cylinder block keyway (10), a scouring ring (12) is arranged at the matching position of the upper end of the main cylinder block (1) and the piston rod (2), a collecting groove (13) with an arc-shaped structure is arranged on the scouring ring (12), a self-lubricating sealing ring (14) is arranged below the scouring ring (12), a guide sleeve one (15) is arranged below the self-lubricating sealing ring (14), a Y-shaped sealing ring (16) is arranged below the guide sleeve one (15), a guide sleeve two (17) is arranged below the Y-shaped sealing ring (16), a stop ring (18) is arranged on the inner wall of the main cylinder block (1), and a sealing ring sleeve (19) is sleeved outside the stop ring (18).

2. The wear-resistant nitrogen spring according to claim 1, wherein The sealing ring sleeve (19) is in a semi-surrounding structure, a matching protrusion (21) is arranged on the inner side of the sealing ring sleeve (19), matching grooves (20) are opened on the upper and lower surfaces of the stop ring (18), and the position and specification of the matching grooves (20) correspond to those of the matching protrusion (21).

3. The wear-resistant nitrogen spring according to claim 2, characterized in that, Two cylinder block keyways (10) are symmetrically arranged, the cylinder block keyway (10) and the limit key (9) are in a tight fit, and the limit key (9) and the piston keyway (11) are in a sliding fit.

4. The wear-resistant nitrogen spring according to claim 3, wherein A sealing connection sleeve ring (6) is arranged at the upper matching position of the valve seat (4) and the main cylinder block (1), a snap ring (7) is arranged at the middle position, and a sealing ring (8) is arranged at the lower matching position of the main cylinder block (1) and the valve seat (4).

5. The wear-resistant nitrogen spring according to claim 4, characterized in that, The surface of the piston rod (2) is treated by titanium plating.

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