Hydraulic oil cylinder with protection mechanism

Abstract

The utility model discloses a hydraulic oil cylinder with a protection mechanism, which comprises a hydraulic oil cylinder body, a piston rod is arranged at the front end of the hydraulic oil cylinder body, an outer sheath sleeved outside the piston rod is mounted at the front end of the hydraulic oil cylinder body, an inner sheath is movably arranged on the inner wall of the outer sheath, and the inner sheath is sleeved outside the piston rod. A circular plate is arranged in the outer end of the inner sheath, a through hole matched with the piston rod is formed in the center of the circular plate, dust scraping rings are arranged at the upper end and the lower end of the inner side of the through hole of the circular plate, sliding columns are arranged on the sides, away from each other, of the dust scraping rings, and positioning blocks in sliding connection with the sliding columns are arranged at the upper end and the lower end of the inner side of the circular plate; and the outer part of the inner end of the sliding column is sleeved with a spring. The hydraulic oil cylinder with the protection mechanism can effectively prevent external dust and foreign matter from invading the interior of the cylinder body, the working efficiency of the oil cylinder is remarkably improved, the service life is prolonged, and the hydraulic oil cylinder is particularly suitable for various hydraulic devices working in severe environments.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a protection mechanism. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When using it to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] As the core actuator of the hydraulic system, the working performance and service life of the hydraulic cylinder largely depend on the cleanliness and sealing of its internal components. However, when the existing hydraulic cylinders are used in harsh environments such as outdoors, mines, and construction sites, they are often invaded by foreign objects such as dust, debris, and moisture, which seriously affects the normal operation of the cylinder and even causes serious faults such as damage to the internal components of the cylinder and seal failure. Utility Model Content

[0004] The purpose of the utility model is to provide a hydraulic cylinder with a protective mechanism to solve the problem raised in the above background technology that when the hydraulic cylinder is used in a harsh environment, the internal cleanliness and sealing are often damaged due to the invasion of foreign matter such as dust, debris, moisture, etc., which seriously affects its working performance and service life and easily causes faults such as component damage and sealing failure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic cylinder with a protective mechanism, comprising a hydraulic cylinder body, a piston rod is provided at the front end of the hydraulic cylinder body, an outer sleeve is installed at the front end of the hydraulic cylinder body and is sleeved on the outside of the piston rod, an inner sleeve is movably provided on the inner wall of the outer sleeve, a circular plate is provided inside the outer end of the inner sleeve, a through hole matching the piston rod is provided at the center of the circular plate, scraper rings are provided at the upper and lower ends of the inner side of the through hole of the circular plate, and a sliding column is provided on the side away from the scraper ring, a positioning block is provided at the upper and lower ends of the inner side of the circular plate and is slidably connected to the sliding column, and a spring is provided on the outer sleeve of the inner end of the sliding column.

[0006] Preferably, an adjusting column is inserted through the outer end of the positioning block via a threaded structure, and the ends of the adjusting column away from each other are connected to the inner wall of the inner sleeve via a bearing.

[0007] Preferably, a sponge ring is provided on the perforated inner wall of the circular plate, and a sealing cover is hingedly connected to the perforated outer side of the circular plate.

[0008] Preferably, a fixing ring is provided on the outer side of the cylinder body of the hydraulic oil cylinder body, and an annular embedding groove which matches the inner end structure of the outer sheath is provided inside the fixing ring.

[0009] Preferably, balls are symmetrically rollingly connected to the inner wall of the outer end of the outer sleeve, and ball grooves matching with the balls are provided on the outer walls on the upper and lower sides of the inner sleeve.

[0010] Preferably, mounting ears are provided on both the front and rear sides of the outer end of the outer sheath, and the mounting ears of the outer end of the outer sheath are inserted with tightening bolts through a threaded structure.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the hydraulic oil cylinder with a protective mechanism can effectively prevent external dust and foreign matter from invading the inside of the cylinder body, significantly improve the working efficiency of the oil cylinder, extend the service life, reduce the failure rate and maintenance cost caused by foreign matter, and is particularly suitable for various hydraulic equipment operating in harsh environments. The hydraulic oil cylinder with a protective mechanism is provided with an outer sheath and an inner sheath on the outside of the piston rod, and the outer sheath and the inner sheath can cooperate with each other to adjust to a suitable use length, so as to form a physical barrier to the outside of the piston rod, and the two scraper rings provided on the inner side of the inner sheath can elastically contact the surface of the piston rod under the cooperation of the positioning block, the sliding column and the spring, so as to scrape off the dust and fine impurities attached to the surface of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a hydraulic cylinder with a protection mechanism of the utility model;

[0013] Figure 2 The utility model is a hydraulic oil cylinder with a protective mechanism Figure 1 The enlarged structural diagram at A in the middle;

[0014] Figure 3 This is a schematic diagram of the inner structure of a circular plate of a hydraulic cylinder with a protective mechanism according to the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the external structure of an outer sheath of a hydraulic oil cylinder with a protection mechanism.

[0016] In the figure: 1. Hydraulic cylinder body; 2. Piston rod; 3. Outer sleeve; 4. Inner sleeve; 5. Dust scraper ring; 6. Round plate; 7. Sponge ring; 8. Cover; 9. Fixed ring; 10. Ball groove; 11. Ball; 12. Adjusting column; 13. Positioning block; 14. Sliding column; 15. Spring; 16. Tightening bolt. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4The utility model provides a technical solution: a hydraulic cylinder with a protective mechanism, comprising a hydraulic cylinder body 1, a piston rod 2 is arranged at the front end of the hydraulic cylinder body 1, an outer sheath 3 sleeved on the outside of the piston rod 2 is installed at the front end of the hydraulic cylinder body 1, an inner sheath 4 is movably arranged on the inner wall of the outer sheath 3, a circular plate 6 is arranged inside the outer end of the inner sheath 4, the circular plate 6 can be fixedly connected to the outer end of the inner sheath 4 by screws, a through hole matched with the piston rod 2 is arranged at the center of the circular plate 6, scraper rings 5 ​​are arranged at the upper and lower ends of the inner side of the through hole of the circular plate 6, the scraper ring 5 is an arc-shaped structure with a blade on the inner wall, and a sliding column 14 is arranged on the side away from the scraper ring 5, and a positioning block 13 which is slidably connected with the sliding column 14 is arranged at the upper and lower ends of the inner side of the circular plate 6. The positioning block 13 is slidably connected to the inner side of the circular plate 6, and a spring 15 is provided on the outer sleeve of the inner end of the sliding column 14. The two ends of the spring 15 are respectively connected to the corresponding sides of the positioning block 13 and the scraper ring 5. The hydraulic cylinder body 1 of this structure can be pre-installed with an outer sleeve 3 on the outside of the piston rod 2 when in use, and the outer sleeve 3 can extend the inner sleeve 4 outward to a suitable length. When the hydraulic cylinder body 1 is driven, the piston rod 2 can pass through the perforation on the circular plate 6 to reciprocate, so that the outer sleeve 3 and the inner sleeve 4 can form a barrier protection for the piston rod 2, and the two scraper rings 5 ​​can slide on the positioning block 13 through the sliding column 14 to make the spring 15 move, so that the blade on the inner wall of the scraper ring 5 can elastically press against the blade attached to the surface of the piston rod 2. The dust and fine impurities on the surface can be scraped off, thereby effectively preventing external dust and foreign matter from invading the interior of the hydraulic cylinder body 1, and avoiding the problem that the hydraulic cylinder body 1 is often invaded by foreign matter such as dust, debris, moisture, etc. when used in some harsh environments, which seriously affects the normal operation, thereby helping to improve the service life of the hydraulic cylinder body 1. The outer end of the positioning block 13 is interspersed with an adjusting column 12 through a threaded structure, and the ends of the adjusting columns 12 that are away from each other are connected to the inner wall of the inner sleeve 4 through a bearing. When the adjusting column 12 of this structure rotates, the positioning block 13 can be driven to shift through the threaded structure. When the positioning block 13 shifts, the scraper ring 5 can be adjusted to a more precise position, so as to more effectively scrape off the dust and fine impurities on the surface of the piston rod 2. In order to avoid the problem that the scraper ring 5 does not contact the surface of the piston rod 2 properly or causes scratches on the surface of the piston rod 2, a sponge ring 7 is bonded and fixed on the inner wall of the perforation of the circular plate 6, and a cover 8 is hinged on the outer side of the perforation of the circular plate 6 through a pin. The sponge ring 7 of this structure can play a preliminary wiping role for the dust and fine impurities attached to the surface of the piston rod 2, and the cover 8 can conveniently seal the perforation of the circular plate 6. A fixing ring 9 is provided on the outer side of the cylinder body of the hydraulic cylinder body 1. The fixing ring 9 can be fixed to the outer side of the cylinder body of the hydraulic cylinder body 1 by welding or screws, and the inside of the fixing ring 9 is provided with an annular groove that matches the inner end structure of the outer sheath 3. The inner end of the outer sheath 3 of this structure can be embedded in the annular groove inside the fixing ring 9 and limited by a locking screw.In this way, the outer sleeve 3 and the inner sleeve 4 can be easily disassembled and assembled at the outer end of the hydraulic cylinder body 1 for regular inspection and cleaning. The inner wall of the outer end of the outer sleeve 3 is symmetrically connected to the rolling connection with the balls 11, and the outer walls of the upper and lower sides of the inner sleeve 4 are provided with ball grooves 10 that match the balls 11. The inner sleeve 4 of this structure can be flexibly extended by rolling along the balls 11 through the ball grooves 10, so as to quickly adjust the inner sleeve 4 and the outer sleeve 3 as a whole to a suitable protective length. The front and rear sides of the outer end of the outer sleeve 3 are welded and fixed with mounting ears, and the mounting ears at the outer end of the outer sleeve 3 are interspersed with tightening bolts 16 through threaded structures. After the outer end of the outer sleeve 3 is extended to a suitable length, the inner sleeve 4 of this structure can be quickly limited by the tightening bolts 16 to ensure the stability of the inner sleeve 4 and the outer sleeve 3 when used together.

[0019] Working principle: When using the hydraulic cylinder with a protective mechanism, first, the inner end of the outer sleeve 3 is embedded in the annular groove inside the fixing ring 9 and the locking screw is used to limit the position so that the outer sleeve 3 is installed on the outside of the piston rod 2. Then, the inner sleeve 4 is extended at the outer end of the outer sleeve 3 according to the stroke of the piston rod 2. When the inner sleeve 4 is extended, it can roll along the outside of the ball 11 through the ball groove 10 until the inner sleeve 4 is adjusted to a suitable length for the use of the piston rod 2 at the outer end of the outer sleeve 3. Then, the tightening bolt 16 is rotated to press the inner end of the inner sleeve 4 against the corresponding outer wall of the inner sleeve 4 for limiting the position. When the hydraulic cylinder body 1 is driven, the piston rod 2 will pass through the perforation on the circular plate 6 to reciprocate, and the piston rod 2 will be recovered. When the piston rod 2 is retracted to the inner side of the circular plate 6, it will rub against the inner wall of the sponge ring 7, so that the sponge ring 7 can preliminarily wipe the dust and fine impurities attached to the surface of the piston rod 2, and when the piston rod 2 is recovered to the inner side of the circular plate 6, it will contact with the two scraper rings 5. When the scraper ring 5 is subjected to force, it can slide on the positioning block 13 through the sliding column 14 to make the spring 15 move. At this time, the blade on the inner wall of the scraper ring 5 will generate an elastic force to scrape off the dust and fine impurities attached to the surface of the piston rod 2, and prevent external dust and foreign matter from invading the interior of the hydraulic cylinder body 1. When the outer sheath 3 is removed, the adjusting column 12 is rotated, and the adjusting column 12 can adjust the position of the scraper ring 5 by driving the positioning block 13 to move up and down, thereby completing a series of tasks.

[0020] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder with a protection mechanism, comprising a hydraulic cylinder body (1), wherein a piston rod (2) is provided at the front end of the hydraulic cylinder body (1), and characterized in that: The front end of the hydraulic cylinder body (1) is provided with an outer sleeve (3) sleeved on the outside of the piston rod (2); an inner sleeve (4) is movably provided on the inner wall of the outer sleeve (3); a circular plate (6) is provided inside the outer end of the inner sleeve (4); a through hole matching the piston rod (2) is provided at the center of the circular plate (6); scraper rings (5) are provided at both upper and lower ends of the inner side of the through hole of the circular plate (6); a sliding column (14) is provided on the side away from the scraper ring (5); positioning blocks (13) are provided at both upper and lower ends of the inner side of the circular plate (6) and are slidably connected to the sliding column (14); and a spring (15) is sleeved on the outer side of the inner end of the sliding column (14).

2. A hydraulic cylinder with a protection mechanism according to claim 1, characterized in that: An adjustment column (12) is inserted through the outer end of the positioning block (13) via a threaded structure, and the ends of the adjustment columns (12) that are away from each other are connected to the inner wall of the inner sleeve (4) via a bearing.

3. The hydraulic cylinder with a protection mechanism according to claim 1, characterized in that: A sponge ring (7) is provided on the perforated inner wall of the circular plate (6), and a sealing cover (8) is hingedly connected to the perforated outer side of the circular plate (6).

4. The hydraulic cylinder with a protection mechanism according to claim 1, characterized in that: A fixing ring (9) is provided on the outside of the cylinder body of the hydraulic oil cylinder body (1), and an annular embedding groove which matches the inner end structure of the outer sleeve (3) is provided inside the fixing ring (9).

5. The hydraulic cylinder with a protection mechanism according to claim 1, characterized in that: Balls (11) are symmetrically rollingly connected to the inner wall of the outer end of the outer sleeve (3), and ball grooves (10) matching with the balls (11) are provided on the outer walls of the upper and lower sides of the inner sleeve (4).

6. The hydraulic cylinder with a protection mechanism according to claim 1, characterized in that: The outer end of the outer sleeve (3) is provided with mounting ears on both the front and rear sides, and the mounting ears at the outer end of the outer sleeve (3) are inserted with tightening bolts (16) through threaded structures.

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