Hydraulic cylinder sealing structure

Abstract

The utility model discloses a hydraulic cylinder sealing structure, which relates to the technical field of hydraulic cylinders and comprises a cylinder sleeve, an ejector rod is arranged in the cylinder sleeve, a threaded ring is fixedly mounted at the upper end of the outer surface of the cylinder sleeve, a connecting ring is in threaded connection with the surface of the threaded ring, and a sealing mechanism is arranged at the upper end of the connecting ring. The sealing mechanism comprises a fixing ring fixedly installed at the upper end of the connecting ring, cleaning cotton is fixedly installed on the inner surface of the fixing ring, the sealing mechanism further comprises a rubber scraping ring fixedly installed at the upper end of the fixing ring, a dustproof film is fixedly arranged on the outer side of the surface of the rubber scraping ring, and the rubber scraping ring is obliquely arranged upwards to form an annular cone. And the inner circular surface of the upper end of the rubber scraping ring is in sliding fit with the surface of the ejector rod. Compared with an existing common hydraulic cylinder, the hydraulic cylinder sealing structure can effectively prevent flying dust from entering through a gap between the cylinder sleeve and the ejector rod, and the using sealing performance of the whole hydraulic cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder sealing structure. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines.

[0003] The sealing structure of the existing hydraulic cylinder is located on the inner side of the cylinder sleeve to prevent the leakage of internal hydraulic oil. However, the sealing of the joint between the cylinder sleeve and the push rod is ignored. When in use, dust and impurities can easily enter the cylinder sleeve through the joint and adhere to the surface of the push rod, which can also cause damage to the hydraulic cylinder.

[0004] Therefore, in view of this, the shortcomings of the existing structure are studied and improved, and a hydraulic cylinder sealing structure is proposed. Utility Model Content

[0005] The purpose of the present utility model is to provide a hydraulic cylinder sealing structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a hydraulic cylinder sealing structure, comprising a cylinder sleeve, a push rod is provided inside the cylinder sleeve, a threaded ring is fixedly installed on the upper end of the outer surface of the cylinder sleeve, a connecting ring is threadedly connected to the surface of the threaded ring, and a sealing mechanism is provided at the upper end of the connecting ring.

[0007] Preferably, the sealing mechanism comprises a fixing ring fixedly mounted on the upper end of the connecting ring, and a cleaning cotton is fixedly mounted on the inner surface of the fixing ring.

[0008] Preferably, the sealing mechanism further comprises a rubber scraper ring fixedly mounted on the upper end of the fixing ring, and a dustproof film is fixedly provided on the outer surface of the rubber scraper ring.

[0009] Preferably, the rubber scraper ring is tilted upward to form an annular cone, and the inner circular surface of the upper end of the rubber scraper ring is slidably fitted with the surface of the push rod.

[0010] Preferably, a conducting pipe is fixedly installed on the front side below the outer surface of the cylinder sleeve, and a fastening head is fixedly provided at the front end of the conducting pipe.

[0011] Preferably, an anti-slip rubber ring is fixedly installed on the outer surface of the fixing ring, and two anti-slip rubber rings are symmetrically fixed up and down along the middle of the fixing ring.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model is provided with a sealing mechanism, a fixing ring, cleaning cotton, a rubber scraper ring and a dustproof film. When the push rod is retracting, it will contact the cleaning cotton and the rubber scraper ring. The rubber scraper ring will first scrape against the surface of the push rod to scrape off the attached dust or impurities, and use its own inclined surface to roll off to prevent accumulation. At the same time, the dustproof film can prevent dust and impurities from sticking to the rubber scraper ring. The cleaning cotton will wipe the push rod for a second time to effectively remove dust and impurities on the surface of the push rod, preventing dust and impurities from entering the cylinder liner with the push rod and causing damage to the entire hydraulic cylinder. In addition, the rubber scraper ring and the cleaning cotton are in close contact with the push rod, which can effectively prevent flying dust from entering through the gap between the cylinder liner and the push rod, thereby improving the sealing performance of the entire hydraulic cylinder.

[0014] 2. The utility model arranges the threaded ring, the connecting ring and the anti-slip rubber ring, and utilizes the threaded connection between the threaded ring and the connecting ring, so that the entire sealing mechanism can be quickly and conveniently disassembled, assembled and replaced. The anti-slip rubber ring holds the entire sealing mechanism, which can increase the friction coefficient during installation, making installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the cylinder sleeve structure of the utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the sealing mechanism of the present invention.

[0018] In the figure: 1. Cylinder liner; 2. Push rod; 3. Guide tube; 4. Fastening head; 5. Threaded ring; 6. Connecting ring; 7. Sealing mechanism; 701. Fixing ring; 702. Cleaning cotton; 703. Rubber scraper; 704. Dustproof film; 8. Anti-slip rubber ring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 3 As shown, a hydraulic cylinder sealing structure includes a cylinder liner 1, a push rod 2 is provided inside the cylinder liner 1, a threaded ring 5 is fixedly installed on the upper end of the outer surface of the cylinder liner 1, a connecting ring 6 is threadedly connected to the surface of the threaded ring 5, and a sealing mechanism 7 is provided on the upper end of the connecting ring 6.

[0021] By adopting the above technical solution and utilizing the threaded connection between the threaded ring 5 and the connecting ring 6 , the entire sealing mechanism 7 can be quickly and conveniently disassembled, assembled, and replaced.

[0022] Furthermore, the sealing mechanism 7 includes a fixing ring 701 fixedly mounted on the upper end of the connecting ring 6, and a cleaning cotton 702 is fixedly mounted on the inner surface of the fixing ring 701;

[0023] The inner side surface of the cleaning cotton 702 is in sliding contact with the surface of the ejector rod 2 .

[0024] By adopting the above technical solution, the cleaning cotton 702 will wipe and clean the top rod 2 twice, which can effectively remove dust and impurities on the surface of the top rod 2.

[0025] Furthermore, the sealing mechanism 7 further includes a rubber scraper ring 703 fixedly mounted on the upper end of the fixing ring 701 , and a dustproof film 704 fixedly provided on the outer surface of the rubber scraper ring 703 .

[0026] Furthermore, the rubber scraper ring 703 is tilted upward to form an annular cone, and the inner circular surface of the upper end of the rubber scraper ring 703 is slidably fitted with the surface of the push rod 2.

[0027] By adopting the above technical solution, the rubber scraper ring 703 will first adhere to the surface of the top rod 2 and scrape off the attached dust or impurities, and use its own inclined surface to roll down to prevent accumulation. At the same time, the dust-proof film 704 can prevent dust and impurities from sticking to the rubber scraper ring 703.

[0028] Furthermore, a conducting pipe 3 is fixedly installed on the front side of the lower portion of the outer surface of the cylinder liner 1 , and a fastening head 4 is fixedly provided at the front end of the conducting pipe 3 .

[0029] By adopting the above technical solution, the oil supply end can be connected using the conducting pipe 3 to transport the hydraulic oil.

[0030] Furthermore, an anti-slip rubber ring 8 is fixedly installed on the outer surface of the fixing ring 701 , and two anti-slip rubber rings 8 are symmetrically fixed up and down along the middle of the fixing ring 701 .

[0031] By adopting the above technical solution, the anti-slip rubber ring 8 holds the entire sealing mechanism 7, which can increase the friction coefficient during installation and make installation more convenient.

[0032] Working principle: When using the hydraulic cylinder sealing structure, first, use the threaded connection of the threaded ring 5 and the connecting ring 6 to install the entire sealing mechanism 7. During installation, manually hold the anti-slip rubber ring 8 to screw the sealing mechanism 7, which can increase the friction coefficient and make installation more convenient. After installation, the top rod 2 will contact the cleaning cotton 702 and the rubber scraper 703 when performing telescopic work. The rubber scraper 703 will first stick to the surface of the top rod 2 and scrape off the attached dust or impurities, and use its own inclined surface to roll down to prevent accumulation and dustproof at the same time. The membrane 704 can prevent dust and impurities from sticking to the rubber scraper ring 703, and the cleaning cotton 702 will wipe and clean the push rod 2 for the second time, which can effectively remove dust and impurities on the surface of the push rod 2, and prevent dust and impurities from following the push rod 2 into the cylinder sleeve 1, causing damage to the entire hydraulic cylinder. In addition, the rubber scraper ring 703 and the cleaning cotton 702 both fit the push rod 2, which can effectively prevent flying dust from entering through the gap between the cylinder sleeve 1 and the push rod 2, thereby improving the sealing performance of the entire hydraulic cylinder. This is the working principle of the hydraulic cylinder sealing structure.

Claims

1. A hydraulic cylinder sealing structure, comprising a cylinder sleeve (1), characterized in that: A push rod (2) is provided inside the cylinder sleeve (1), a threaded ring (5) is fixedly installed on the upper end of the outer surface of the cylinder sleeve (1), a connecting ring (6) is threadedly connected to the surface of the threaded ring (5), a sealing mechanism (7) is provided on the upper end of the connecting ring (6), the sealing mechanism (7) comprises a fixing ring (701) fixedly installed on the upper end of the connecting ring (6), a cleaning cotton (702) is fixedly installed on the inner surface of the fixing ring (701), and the sealing mechanism (7) further comprises a rubber scraper ring (703) fixedly installed on the upper end of the fixing ring (701), and a dustproof film (704) is fixedly provided on the outer side of the surface of the rubber scraper ring (703).

2. A hydraulic cylinder sealing structure according to claim 1, characterized in that: The rubber scraper ring (703) is tilted upward to form a ring-shaped cone, and the inner circular surface of the upper end of the rubber scraper ring (703) is in sliding contact with the surface of the push rod (2).

3. The hydraulic cylinder sealing structure according to claim 1, characterized in that: A conducting pipe (3) is fixedly mounted on the front side below the outer surface of the cylinder sleeve (1), and a fastening head (4) is fixedly provided at the front end of the conducting pipe (3).

4. The hydraulic cylinder sealing structure according to claim 1, characterized in that: An anti-slip rubber ring (8) is fixedly mounted on the outer surface of the fixing ring (701), and two anti-slip rubber rings (8) are symmetrically fixed up and down along the middle of the fixing ring (701).

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