Oil cylinder displacement sensor installation structure not prone to oil seepage

Abstract

The utility model discloses an oil cylinder displacement sensor installation structure not prone to oil seepage, which comprises a protective sleeve, a sealing sleeve, a limiting ring, a limiting groove, a cylinder body, a sealing bottom cover and a displacement sensor, the sealing bottom cover is installed at the bottom of the cylinder body, a piston is arranged in the cylinder body, a cavity is arranged in the piston, an oil filling cavity is formed between the piston and the sealing bottom cover, and the displacement sensor is arranged in the cavity. The sealing bottom cover is provided with an oil through hole communicated with the oil filling cavity, the oil through hole is opened outside the sealing bottom cover, the bottom of the piston is provided with a limiting groove with an opening in the lower end, the groove bottom of the limiting groove is provided with a through hole, and the through hole is communicated with the cavity and the limiting groove. The bottom of the limiting groove abuts against the limiting ring, and the limiting groove is formed in the bottom of the piston, so that pressure between the limiting ring and the limiting groove can be increased through oil pressure, oil is not prone to leaking through the binding face of the limiting ring and the bottom of the limiting groove, the performance of the oil cylinder is stable, and use is safer and more reliable.

Description

[Technical field]

[0001] The utility model relates to the technical field of oil cylinders, in particular to the technical field of oil cylinder position sensor installation structures. [Background technology]

[0002] The oil cylinder displacement sensor is a device that detects the stroke of the oil cylinder, which can reflect the stroke of the oil cylinder in real time. The oil cylinder displacement sensor is generally installed inside the oil cylinder, and it will pass through the oil filling chamber of the oil cylinder and penetrate into the piston. The oil cylinder is located outside the sensor and there is a protective cover, which also penetrates into the piston. Due to the high oil pressure in the oil filling chamber, the oil can easily penetrate into the piston through the gap between the protective cover and the piston, causing oil leakage, which will reduce the sealing performance of the oil cylinder, reduce the support force or thrust of the oil cylinder, and bring safety hazards. [Contents of the utility model]

[0003] The purpose of the utility model is to solve the problems in the prior art and to propose an oil cylinder displacement sensor installation structure that is not easy to leak oil, so that the bottom of the limit groove can be against the limit ring, and the limit groove is arranged at the bottom of the piston, so that the oil pressure can increase the pressure between the limit ring and the limit groove, making it difficult for oil to leak through the fitting surface between the limit ring and the bottom of the limit groove.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes an oil cylinder displacement sensor installation structure that is not easy to leak oil, including a protective sleeve, a sealing sleeve, a limiting ring, a limiting groove, a cylinder body, a sealing bottom cover, and a displacement sensor. A sealing bottom cover is installed at the bottom of the cylinder body, a piston is arranged inside the cylinder body, a cavity is arranged inside the piston, an oil-filled cavity is formed between the piston and the sealing bottom cover, an oil through hole connected to the oil-filled cavity is arranged on the sealing bottom cover, and the oil through hole opens on the outside of the sealing bottom cover, a limiting groove with an opening at the lower end is arranged at the bottom of the piston, and the bottom of the limiting groove is arranged There is a through hole, which connects the cavity and the limiting groove. The protective sleeve is a cylinder with only the bottom end open. The protective sleeve passes through the through hole and is inserted into the cavity. A limiting ring is provided on the outer wall of the protective sleeve. The limiting ring and the protective sleeve are an integrated structure. The limiting ring is tightly attached to the bottom of the limiting groove. The limiting ring is fixed to the bottom of the limiting groove. The displacement sensor is composed of a connected main body and an insertion part. The main body is fixed on the sealing bottom cover. The insertion part passes through the oil-filled cavity and is inserted into the protective sleeve from the bottom end. A sealing sleeve is sleeved on the outside of the insertion part, and the sealing sleeve is fixed to the bottom of the protective sleeve.

[0005] Preferably, the piston consists of a main plug body and a sealing bottom plate, the cavity opens at the bottom end of the main plug body, the sealing bottom plate is fixed to the bottom end of the main plug body, and the limiting groove and the through hole are provided on the sealing bottom plate.

[0006] Preferably, an annular groove is provided at the end of the limiting ring that fits with the bottom of the limiting groove, the annular groove surrounds the protective sleeve, a sealing ring is embedded in the annular groove, and the sealing ring is in close contact with the bottom of the limiting groove.

[0007] Preferably, the sealed bottom cover is provided with a mounting cavity penetrating the sealed bottom cover, and the main body is fixed in the mounting cavity.

[0008] Preferably, the bottom end of the limiting ring is flush with the bottom end of the protective sleeve.

[0009] The beneficial effects of the utility model are as follows: the utility model presses the bottom of the limit groove against the limit ring, and the limit groove is provided at the bottom of the piston, so that the oil pressure can increase the pressure between the limit ring and the limit groove, making it difficult for the oil to leak through the fitting surface between the limit ring and the bottom of the limit groove, thereby stabilizing the performance of the oil cylinder and making it safer and more reliable to use.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 This is a front view of the installation structure of the oil cylinder displacement sensor which is not easy to leak oil according to the utility model;

[0012] Figure 2 It is a partial schematic diagram of the installation structure of the oil cylinder displacement sensor which is not easy to leak oil according to the utility model.

[0013] In the figure: 1-cylinder body, 2-piston, 3-displacement sensor, 4-protective sleeve, 10-sealed bottom cover, 11-oil hole, 12-installation cavity, 20-cavity, 21-sealed bottom plate, 22-limiting groove, 23-through hole, 31-main body, 32-insertion part, 33-sealing sleeve, 40-limiting ring, 41-annular groove, 42-sealing ring. [Specific implementation method]

[0014] See also Figure 1 , Figure 2The utility model is a cylinder displacement sensor installation structure that is not easy to leak oil, comprising a protective sleeve 4, a sealing sleeve 33, a limiting ring 40, a limiting groove 22, a cylinder body 1, a sealing bottom cover 10, and a displacement sensor 3. A sealing bottom cover 10 is installed at the bottom of the cylinder body 1, a piston 2 is arranged inside the cylinder body 1, a cavity 20 is arranged inside the piston 2, an oil-filled cavity is formed between the piston 2 and the sealing bottom cover 10, an oil through hole 11 connected to the oil-filled cavity is arranged on the sealing bottom cover 10, and the oil through hole 11 is opened outside the sealing bottom cover 10, a limiting groove 22 with an opening at the lower end is arranged at the bottom of the piston 2, a through hole 23 is arranged at the bottom of the limiting groove 22, and the through hole 23 communicates the cavity 20 and the limiting groove 22 The protective sleeve 4 is a cylinder with only the bottom end open. The protective sleeve 4 is inserted into the cavity 20 through the through hole 23. A limit ring 40 is provided on the outer wall of the protective sleeve 4. The limit ring 40 and the protective sleeve 4 are an integrated structure. The limit ring 40 is close to the bottom of the limit groove 22. The limit ring 40 and the bottom of the limit groove 22 are fixed by a plurality of bolts. The displacement sensor 3 is composed of a connected main body 31 and an insertion part 32. The main body 31 is fixed on the sealing bottom cover 10. The insertion part 32 passes through the oil-filled cavity and is inserted into the protective sleeve 4 from the bottom end. A sealing sleeve 33 is sleeved on the outside of the insertion part 32. The sealing sleeve 33 is fixed to the bottom of the protective sleeve 4, and the insertion part 32 and the sealing sleeve 33 can slide relative to each other.

[0015] The piston 2 is composed of a main plug body and a sealing bottom plate 21 . The cavity 20 is opened at the bottom end of the main plug body. The sealing bottom plate 21 is fixed to the bottom end of the main plug body. The limiting groove 22 and the through hole 23 are provided on the sealing bottom plate 21 .

[0016] The end of the limiting ring 40 that fits with the bottom of the limiting groove 22 is provided with an annular groove 41 , which surrounds the protective sleeve 4 , and a sealing ring 42 is embedded in the annular groove 41 , which is in close contact with the bottom of the limiting groove 22 .

[0017] The sealing bottom cover 10 is provided with a mounting cavity 12 penetrating the sealing bottom cover 10 , and the main body 31 is fixed in the mounting cavity 12 .

[0018] The bottom end of the limiting ring 40 is flush with the bottom end of the protective cover 4 .

[0019] Working process of this utility model:

[0020] During the operation of the oil cylinder displacement sensor installation structure which is not prone to oil leakage of the utility model, when the oil cylinder is in use, the oil filling chamber is filled with high-pressure oil, and the high-pressure oil will give an upward pressure to the limit ring 40, so that the limit ring 40 has a tendency to move toward the bottom of the limit groove 22, so that it is not easy for a gap to appear between the fitting surfaces of the limit ring 40 and the limit groove 22, and it is not easy for oil to leak. The greater the pressure, the greater the pressure between the limit ring 40 and the limit groove 22, and the less likely it is to leak, so that the use of the oil cylinder is safer and more reliable.

[0021] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. The oil cylinder displacement sensor installation structure that is not easy to leak oil is characterized by: The invention comprises a protective sleeve (4), a sealing sleeve (33), a limiting ring (40), a limiting groove (22), a cylinder body (1), a sealing bottom cover (10), and a displacement sensor (3). A sealing bottom cover (10) is installed at the bottom of the cylinder body (1). A piston (2) is arranged inside the cylinder body (1). A cavity (20) is arranged inside the piston (2). An oil-filled cavity is formed between the piston (2) and the sealing bottom cover (10). An oil-through hole (11) connected to the oil-filled cavity is arranged on the sealing bottom cover (10). The oil-through hole (11) opens outside the sealing bottom cover (10). A limiting groove (22) with an open lower end is arranged at the bottom of the piston (2). A through hole (23) is arranged at the bottom of the limiting groove (22). The through hole (23) connects the cavity (20) and the limiting groove (22). 22), the protective sleeve (4) is a cylinder with only a bottom end open, the protective sleeve (4) passes through the through hole (23) and is inserted into the cavity (20), a limiting ring (40) is provided on the outer wall of the protective sleeve (4), the limiting ring (40) and the protective sleeve (4) are an integrated structure, the limiting ring (40) is in close contact with the bottom of the limiting groove (22), the limiting ring (40) and the bottom of the limiting groove (22) are fixed, the displacement sensor (3) is composed of a connected main body (31) and an insertion part (32), the main body (31) is fixed on the sealing bottom cover (10), the insertion part (32) passes through the oil filling cavity and is inserted into the protective sleeve (4) from the bottom end, a sealing sleeve (33) is sleeved on the outside of the insertion part (32), and the sealing sleeve (33) is fixed to the bottom of the protective sleeve (4).

2. The oil cylinder displacement sensor installation structure that is not easy to leak oil according to claim 1, characterized in that: The piston (2) is composed of a main plug body and a sealing bottom plate (21), the cavity (20) is open at the bottom end of the main plug body, the sealing bottom plate (21) is fixed to the bottom end of the main plug body, and the limiting groove (22) and the through hole (23) are provided on the sealing bottom plate (21).

3. The oil cylinder displacement sensor installation structure that is not easy to leak oil according to claim 1, characterized in that: An annular groove (41) is provided at the end of the limiting ring (40) that is in contact with the bottom of the limiting groove (22). The annular groove (41) surrounds the protective sleeve (4). A sealing ring (42) is embedded in the annular groove (41). The sealing ring (42) is in close contact with the bottom of the limiting groove (22).

4. The oil cylinder displacement sensor installation structure that is not prone to oil leakage as claimed in claim 1 is characterized in that: The sealing bottom cover (10) is provided with a mounting cavity (12) penetrating the sealing bottom cover (10), and the main body (31) is fixed in the mounting cavity (12).

5. The oil cylinder displacement sensor installation structure that is not prone to oil leakage as claimed in claim 1, characterized in that: The bottom end of the limiting ring (40) is flush with the bottom end of the protective sleeve (4).

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