Y-shaped sealing ring mounting tool

Abstract

The utility model relates to a Y-shaped sealing ring installation tool which comprises a straight pipe sleeve and a horn-shaped barrel formed at one end of the straight pipe sleeve, the outer diameter of the straight pipe sleeve is larger than the inner diameter of an oil cylinder barrel and smaller than the inner diameter of an end cover installation cavity, and the inner diameter of the straight pipe sleeve is the same as the inner diameter of the oil cylinder barrel. The small-radius end of the horn is connected with the straight pipe sleeve, and the inner wall of the joint of the horn and the straight pipe sleeve is in smooth transition; according to the installation tool, the straight pipe sleeve and the horn-shaped barrel are combined to form the installation tool, the straight pipe sleeve extends into the oil cylinder, and due to the fact that the inner diameter of the straight pipe sleeve is the same as that of the oil cylinder barrel, it can be guaranteed that the Y-shaped sealing ring cannot be clamped on a boss formed by the end cover installation cavity and the oil cylinder barrel when entering the oil cylinder barrel along with a piston; and the Y-shaped sealing ring can smoothly enter the cylinder barrel of the oil cylinder.

Description

TECHNICAL FIELD

[0001] The utility model relates to seal ring installation technical field, especially a Y type seal ring installation tool. BACKGROUND

[0002] The Y type seal ring for shaft is a seal member with Y type section, and the commonly used material is polyurethane TPU and CPU rubber, and the Y type seal ring for shaft is mainly applied to the sealing of piston rod in reciprocating hydraulic cylinder. Figure 1 During the assembly of the oil cylinder, when the piston is installed, the Y type seal ring on the piston is easily stuck in the installation cavity at the front end of the cylinder barrel because the outer diameter (the outer ring radius of the seal ring) of the Y type seal ring is greater than the inner diameter of the cylinder barrel, and the Y type seal ring is stuck in the installation cavity at the front end of the cylinder barrel when the piston is inserted into the oil cavity. Figure 2 The inner diameter of the installation cavity is relatively large, and the installation cavity is mainly used for installing the end cover, and a boss structure is formed between the installation cavity of the end cover and the piston cylinder barrel. Because of the size difference between the outer diameter of the Y type seal ring and the inner diameter of the installation cavity, the seal ring is often stuck on the boss during assembly, causing installation difficulties, and multiple attempts are required to successfully pass through to finally complete the installation of the seal ring.

[0003] Therefore, it is necessary to realize the rapid installation of the seal ring. INVENTION CONTENTS

[0004] In order to solve the problems in the above background art, the utility model provides a Y type seal ring installation tool, which can realize rapid installation.

[0005] The technical scheme is as follows: a Y type seal ring installation tool, comprising a straight pipe sleeve and a trumpet barrel formed at one end of the straight pipe sleeve, the outer diameter of the straight pipe sleeve is greater than the inner diameter of the cylinder barrel of the oil cylinder and smaller than the inner diameter of the installation cavity of the end cover, the inner diameter of the straight pipe sleeve is the same as the inner diameter of the cylinder barrel of the oil cylinder, the smaller radius end of the trumpet barrel is connected with the straight pipe sleeve, and the inner wall of the connection part is smoothly transitioned.

[0006] Preferably, the taper ratio of the trumpet barrel is between 0.1 and 0.2.

[0007] Preferably, the wall thickness of the trumpet barrel is greater than the wall thickness of the straight pipe sleeve, and a convex rib is formed at the connection part of the outer walls of the two.

[0008] Preferably, the outer diameter of the straight pipe sleeve is 0.15-0.02mm smaller than the inner diameter of the installation cavity of the end cover.

[0009] Preferably, the installation tool is made of stainless steel, and the roughness Ra of the inner and outer walls of the tool is between 0.30 and 0.50 microns.

[0010] Preferably, a push rod is further included, the push rod is a tubular structure, an outer diameter of the push rod is slightly smaller than an inner diameter of the straight pipe sleeve, and the push rod is used for sending the piston provided with the Y-shaped sealing ring into the cylinder barrel of the oil cylinder.

[0011] Compared with the prior art, the utility model has the advantages of:

[0012] The utility model discloses a mounting tool which is formed by combining the straight pipe sleeve and the horn barrel, and the straight pipe sleeve is inserted into the oil cylinder, and the inner diameter of the straight pipe sleeve is the same as the inner diameter of the cylinder barrel of the oil cylinder, so that the Y-shaped sealing ring can enter the cylinder barrel of the oil cylinder smoothly without being clamped on the boss formed by the end cover mounting cavity and the cylinder barrel. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a partial structure diagram of the prior art piston and oil cylinder.

[0014] Figure 2 It is an enlarged diagram of A in the figure. Figure 1

[0015] Figure 3 It is a schematic diagram of the mounting tool, wherein d" represents the outer diameter of the straight pipe sleeve, and d' represents the inner diameter of the straight pipe sleeve.

[0016] Figure 4 It is a schematic diagram of the oil cylinder body, the mounting tool and the push rod.

[0017] Figure 5 It is a schematic diagram of installing the piston into the cylinder barrel of the oil cylinder through the mounting tool. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] As Figure 3 , 4 ​The Y-shaped sealing ring installation tool shown includes a straight pipe sleeve 1 and a trumpet sleeve 2 formed at one end of the straight pipe sleeve 1. The entire installation tool is in the shape of a long pipe. The smaller radius end of the trumpet sleeve 2 is connected to the straight pipe sleeve 1. The inner and outer walls of the tool are polished. The specific radius parameters of the tool need to meet the following requirements: 1. The outer diameter d of the straight pipe sleeve 1 is larger than the inner diameter d of the oil cylinder barrel 3 (the movable part of the piston 8, also referred to as "piston cavity") but smaller than the inner diameter I of the end cover installation cavity 4. 2. The inner diameter d' of the straight pipe sleeve 1 is the same as or slightly smaller than the inner diameter d of the oil cylinder barrel 3. However, it must be ensured that the piston 9 in which the Y-shaped sealing ring 8 is installed can enter the straight pipe sleeve 1 and move forward.

[0020] Use of the tool: as shown in Figure 5 When installing or replacing the Y-shaped sealing ring 8, first remove the end cover of the cylinder body 7, then insert the installation tool into the end cover installation cavity 4 along the front end of the cylinder body 7. Due to the size limitation of the installation tool, the tool will be stuck on the boss formed by the end cover installation cavity 4 and the oil cylinder barrel 3 after being inserted into the end cover installation cavity 4. Then insert the piston 9 with the Y-shaped sealing ring 8 into the trumpet sleeve 2 at one end (the position of B in the figure is the initial position). Before insertion, attention should be paid to whether the direction of the Y-shaped sealing ring 8 is correct. Since the radius of the trumpet sleeve 2 is larger than the radius of the piston 9 and the inner wall thereof is polished to a high precision, the piston 9 can enter the straight pipe sleeve 1 very smoothly (corresponding to B' in the figure). Since the inner diameter d of the oil cylinder barrel 3 is almost the same as the inner diameter d' of the straight pipe sleeve 1, the Y-shaped sealing ring 8 will not be stuck on the boss during the forward feeding process and can be smoothly installed in the oil cylinder barrel 3.

[0021] Using the installation tool, the Y-shaped sealing ring 8 can be conveniently and quickly installed or replaced. Especially for oil cylinders used in some complex working environments, such as high-temperature environments of ore smelting furnaces, the sealing ring can be quickly replaced and repaired, which can reduce the impact of high-temperature environments on the operator's body.

[0022] In a specific embodiment, the installation tool is integrally cast from stainless steel. The inner and outer walls of the tool are polished. The roughness Ra is preferably between 0.30 and 0.50 μm. Using stainless steel for casting makes the tool as a whole, which is not easy to damage. In addition, the structure of the integral molding has no joints. When polishing the inner and outer walls, the surface finish can be greatly improved.

[0023] In a specific embodiment, the taper ratio of the horn barrel 2 is between 0.1 and 0.2. Preferably, the taper ratio is 0.1, under which the maximum radius and length of the horn barrel 2 are optimal, the piston 9 fits better when put in, and is less likely to be skewed, and the total length of the tool can also be kept in a better state, facilitating carrying and storage. In addition, it should be noted that the wall thickness of the horn barrel 2 is greater than that of the straight pipe sleeve 1, and the wall thickness of the horn barrel 2 is greater than that of the straight pipe sleeve 1, which can enhance the strength of the horn barrel 2. In addition, a convex rib 5 is formed at the connection between the outer walls of the two, and the radius of the convex rib 5 is much larger than the inner diameter I of the end cover mounting cavity 4, which can prevent the tool from being stuck in the end cover mounting cavity 4.

[0024] In a preferred embodiment, the outer diameter of the straight pipe sleeve 1 is 0.15-0.02 mm smaller than the inner diameter I of the end cover mounting cavity 4. This size difference can ensure that the straight pipe sleeve 1 and the oil cylinder barrel 3 are as straight as possible after the straight pipe sleeve 1 enters the end cover mounting cavity 4, and the straight pipe sleeve 1 and the inner wall of the oil cylinder barrel 3 can smoothly transition, so that the Y-shaped sealing ring 8 can be installed more smoothly.

[0025] In addition, the tool also includes a push rod 6, which is a tubular structure with an outer diameter slightly smaller than the inner diameter of the straight pipe sleeve 1. Since the length of a person's fingers is limited, the push rod 6 can assist in sending the piston 9 with the Y-shaped sealing ring 8 into the oil cylinder barrel 3.

[0026] The above-described embodiments only express the preferred embodiments of the present application, which are described in more detail and in detail, but should not be construed as limiting the scope of the present application. It should be noted that for those skilled in the art, without departing from the inventive concept, a number of modifications, improvements and substitutions can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A Y-seal ring installation tool characterized by, The application relates to a mounting tool for a Y-type sealing ring, which comprises a straight pipe sleeve (1) and a trumpet sleeve (2) formed at one end of the straight pipe sleeve (1), the outer diameter (d'') of the straight pipe sleeve (1) is larger than the inner diameter (d) of a cylinder barrel (3) and smaller than the inner diameter (I) of an end cover mounting cavity (4), the inner diameter (d') of the straight pipe sleeve (1) is the same as the inner diameter (d) of the cylinder barrel (3), and the trumpet sleeve (2) is connected with the straight pipe sleeve (1) at a smaller radius end, and the inner wall of the connecting position is smoothly connected.

2. The Y-ring installation tool of claim 1, wherein, The taper ratio of the trumpet sleeve (2) is between 0.1 and 0.

2.

3. The Y-ring installation tool of claim 1, wherein, The wall thickness of the trumpet sleeve (2) is larger than that of the straight pipe sleeve (1), and a convex rib (5) is formed at the connecting position of the outer walls of the trumpet sleeve (2) and the straight pipe sleeve (1).

4. The Y-ring installation tool of claim 1, wherein, The outer diameter of the straight pipe sleeve (1) is smaller than the inner diameter (I) of the end cover mounting cavity (4) by 0.15-0.02 mm.

5. The Y-ring installation tool of claim 1, wherein, The mounting tool is made of stainless steel, and the roughness Ra of the inner and outer walls of the tool is between 0.30 and 0.50 mu m.

6. The Y-ring installation tool of claim 1, wherein, The mounting tool further comprises a push rod (6) which is a tubular structure and whose outer diameter is slightly smaller than the inner diameter of the straight pipe sleeve (1), and the push rod (6) is used for sending a piston (9) provided with a Y-type sealing ring (8) into the cylinder barrel (3).

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