Self-pressure-relief oil cylinder

Abstract

The utility model discloses a self pressure relief oil cylinder, which relates to the technical field of oil cylinders and comprises a cylinder head, an oil cylinder body is fixedly mounted on one side of the cylinder head, a piston rod is arranged in the oil cylinder body, a spring is sleeved on the piston rod, a piston sleeve is further arranged at the joint of the cylinder head and the oil cylinder body, and the piston sleeve is sleeved on the piston rod. The piston rod is inserted into the piston sleeve, one end of the piston rod is fixedly connected with a square cutter, a circular cutter is further arranged in the cylinder head, and a gland is arranged at the bottom of the circular cutter and fixedly installed on the cylinder head. According to the utility model, the stroke of the piston rod is limited, so that the pressure is automatically released after the use effect is achieved; the noise and the impact force are improved; in addition, the outer piston rod automatically relieves pressure after reaching a limit position, so that the spring is prevented from being crushed, and the maintenance and replacement frequency is reduced; and finally, after the pressure of the oil cylinder is relieved, the continuous high-pressure state of an oil way is relieved, and the service life of the oil cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to a self-decompression oil cylinder. Background Art

[0002] Disadvantages of traditional oil cylinder:

[0003] ① The cylinder piston rod extends too long and hits the piston sleeve, commonly known as bottoming, which can easily damage parts.

[0004] ② After primer application, loud noise is generated and there is great impact stress, which damages the cylinder head.

[0005] ③ When the piston rod exceeds the rated stroke, the spring is subjected to pressure that exceeds its bearing capacity, causing fatigue and physical damage to the spring, causing it to break.

[0006] ④ The longer the piston rod is extended, the greater the oil pressure inside it, and the greater the impact on the entire oil system.

[0007] Therefore, the utility model proposes a self-pressure relief cylinder. Utility Model Content

[0008] Technical issues solved

[0009] The purpose of the utility model is to make up for the deficiencies of the prior art and provide a self-depressurizing oil cylinder.

[0010] Technical Solution

[0011] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-pressure relief cylinder, comprising a cylinder head, a cylinder body fixedly installed on one side of the cylinder head, a piston rod arranged inside the cylinder body, a spring sleeved on the piston rod, a piston sleeve also arranged at the connection between the cylinder head and the cylinder body, the piston rod inserted into the piston sleeve, a square knife fixedly connected to one end of the piston rod, a round knife also arranged inside the cylinder head, a pressure cover arranged at the bottom of the round knife, the pressure cover fixedly installed on the cylinder head, an H joint threadedly connected at the center of one side of the cylinder body, and a straight joint threadedly connected on the side of the cylinder body where the H joint is installed.

[0012] Preferably, there are two straight-through connectors, and the two straight-through connectors are symmetrically arranged about the H connector.

[0013] Preferably, a threaded hole 1 is opened inside the cylinder head, a through hole 1 is opened on one side of the cylinder body, a fixing stud 1 is inserted into the through hole 1, and the fixing stud 1 is threadedly connected to the inside of the threaded hole 1.

[0014] Preferably, a second threaded hole is provided at the bottom of the cylinder head, a second through hole is provided inside the gland, a second fixing stud is inserted inside the second through hole, and the second fixing stud is threadedly connected inside the second threaded hole.

[0015] Preferably, a through hole three is opened at one end of the piston rod, a threaded hole three is opened inside the square knife, a fixing stud three is inserted into the through hole three, and the fixing stud three is threadedly connected to the inside of the threaded hole three.

[0016] Preferably, a threaded hole for installing an H-joint and a through-joint is provided on one side of the cylinder body.

[0017] Beneficial effects:

[0018] Compared with the prior art, the self-depressurized oil cylinder has the following beneficial effects:

[0019] The utility model limits the stroke of the piston rod, so that the pressure is automatically released after the use effect is achieved; and the noise and impact force of the utility model are improved; in addition, the outer piston rod of the utility model automatically releases pressure after reaching the limit position, which ensures that the spring is not crushed and reduces the frequency of maintenance and replacement; finally, after the oil cylinder of the utility model releases pressure, the continuous high pressure state of the oil circuit is alleviated, thereby increasing its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0022] Figure 3 This is a schematic diagram of the installation structure of the gland of the utility model;

[0023] Figure 4 It is a cross-sectional structural schematic diagram of the utility model;

[0024] Figure 5 It is a schematic diagram of the structure of the utility model when viewed from above.

[0025] In the figure:

[0026] 1. Cylinder head; 2. Cylinder body; 3. Piston rod; 4. Spring; 5. Piston sleeve; 6. Square knife; 7. Round knife; 8. Gland; 9. H joint; 10. Straight joint; 11. Fixing stud 1; 12. Fixing stud 2; 13. Fixing stud 3. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1 to Figure 5 As shown, the utility model provides a technical solution: a self-pressure relief cylinder, including a cylinder head 1, a carrier of all its parts, a cylinder body 2 is fixedly installed on one side of the cylinder head 1, the cylinder body 2 is an important component of the self-pressure relief function, the tail car has an annular groove and an "oil leakage hole" and an "oil supply hole", and cooperates with the "piston rod" to achieve its function, a piston rod 3 is arranged inside the cylinder body 2, the piston rod 3 acts as an active switch relative to the self-pressure relief function, and is an actuator relative to the shear part, a spring 4 is sleeved on the piston rod 3, the spring 4 is used to make the "piston rod 3" return quickly, a piston sleeve 5 is also arranged at the connection between the cylinder head 1 and the cylinder body 2, the piston rod 3 is inserted into the inside of the piston sleeve 5, the piston sleeve 5 is used to limit, support and seal the "piston rod 3", and one end of the piston rod 3 is fixedly connected with Square knife 6, when the linear material enters the knife hole, "square knife 6" and "round knife 7" are relatively displaced to cause shearing. A round knife 7 is also arranged inside the cylinder head 1. When the linear material enters the knife hole, "square knife 6" and "round knife 7" are relatively displaced to cause shearing. A pressure cover 8 is arranged at the bottom of the round knife 7. The pressure cover 8 is used to fix the axial displacement of the "round knife 7". The pressure cover 8 is fixedly installed on the cylinder head 1. An H joint 9 is threadedly connected at the center of one side of the cylinder body 2. The H joint 9 is a through hole for oil supply. A threaded hole 202 for installing the H joint 9 and the straight joint 10 is opened on one side of the cylinder body 2. The side of the cylinder body 2 where the H joint 9 is installed is also threadedly connected with a straight joint 10. The straight joint 10 is a through hole for oil leakage. There are two straight joints 10, and the two straight joints 10 are symmetrically arranged about the H joint 9.

[0029] A threaded hole 1 is provided inside the cylinder head 1 of the present application, a through hole 1 is provided on one side of the cylinder body 2, a fixing stud 11 is inserted into the through hole 1, and the fixing stud 11 is threadedly connected to the inside of the threaded hole 1.

[0030] The bottom of the cylinder head 1 of the present application is provided with a threaded hole 2, the interior of the pressure cover 8 is provided with a through hole 2, the interior of the through hole 2 is plugged with a fixing stud 2 12, and the fixing stud 2 12 is threadedly connected to the interior of the threaded hole 2.

[0031] A through hole three is formed at one end of the piston rod 3 of the present application, a threaded hole three is formed inside the square knife 6, a fixing stud three 13 is inserted into the through hole three, and the fixing stud three 13 is threadedly connected to the inside of the threaded hole three.

[0032] Working principle: The present invention is an oil cylinder which automatically releases pressure after the oil cylinder rod is extended to a certain length, referred to as "self-pressure relief oil cylinder", the main body is a cast "cylinder head 1", the front of which is equipped with a "circular knife 7", "pressure cover 8" and the like, and the back is equipped with a "cylinder body 2", inside of which is a "piston rod 3" and a "spring 4" for resetting, and the front end of the "piston rod 3" is fixed with a "square knife 6" and a "piston sleeve 5".

[0033] When the oil enters the special "oil cylinder rigid body 2" from the "H joint 9", it pushes the "piston rod 3" forward, and the "square knife 6" and "circular knife 7" are relatively displaced, producing a shearing effect. However, when the "piston rod 3" moves forward to the designed position, the two holes at the end of the "oil cylinder body 2" will be opened, and the pressurized oil will flow out from the holes and the "straight joint 10", that is, the pressure is released.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-depressurizing oil cylinder, comprising a cylinder head (1), characterized in that: A cylinder body (2) is fixedly mounted on one side of the cylinder head (1), a piston rod (3) is arranged inside the cylinder body (2), a spring (4) is sleeved on the piston rod (3), a piston sleeve (5) is also arranged at the connection between the cylinder head (1) and the cylinder body (2), the piston rod (3) is inserted into the piston sleeve (5), one end of the piston rod (3) is fixedly connected to a square knife (6), a round knife (7) is also arranged inside the cylinder head (1), a pressure cover (8) is arranged at the bottom of the round knife (7), and the pressure cover (8) is fixedly mounted on the cylinder head (1), an H-joint (9) is threadedly connected at the center of one side of the cylinder body (2), and a straight-through joint (10) is also threadedly connected to the side of the cylinder body (2) where the H-joint (9) is installed.

2. The self-pressure relief cylinder according to claim 1, characterized in that: There are two straight-through connectors (10), and the two straight-through connectors (10) are symmetrically arranged with respect to the H connector (9).

3. The self-depressurizing cylinder according to claim 1, characterized in that: A threaded hole is provided inside the cylinder head (1), a through hole is provided on one side of the oil cylinder body (2), a fixing stud (11) is inserted into the through hole, and the fixing stud (11) is threadedly connected to the inside of the threaded hole.

4. The self-depressurizing cylinder according to claim 1, characterized in that: The bottom of the cylinder head (1) is provided with a second threaded hole, the interior of the pressure cover (8) is provided with a second through hole, the interior of the second through hole is plugged with a second fixing stud (12), and the second fixing stud (12) is threadedly connected to the interior of the second threaded hole.

5. The self-depressurizing cylinder according to claim 1, characterized in that: A through hole three is formed at one end of the piston rod (3), a threaded hole three is formed inside the square knife (6), a fixing stud three (13) is inserted into the through hole three, and the fixing stud three (13) is threadedly connected to the inside of the threaded hole three.

6. The self-depressurizing cylinder according to claim 1, characterized in that: A threaded hole for installing an H-joint (9) and a straight-through joint (10) is provided on one side of the oil cylinder body (2).

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