Anti-leakage oil cylinder

Abstract

The utility model provides an anti-leakage type oil cylinder which comprises an oil cylinder body, a piston rod, a piston and a cylinder cover, threads are arranged on the surface of the oil cylinder body, the piston rod, the piston and the cylinder cover are arranged in the oil cylinder body, a pair of first sealing rings is arranged to seal the piston, after one sealing ring is abraded, the other sealing ring can complete sealing, and therefore the sealing performance of the oil cylinder is improved. The sealing performance of the piston is effectively guaranteed, oil liquid is prevented from leaking out of the piston, the connecting position of the piston rod and the cylinder cover is sealed through the second sealing ring, the two sides of the cylinder cover are clamped into the sealing ring grooves of the cylinder cover through the clamping parts, the sealing rings can be supported and clamped through the clamping parts, and therefore the sealing performance of the piston is improved. According to the oil cylinder, the oil cylinder is effectively prevented from shaking or falling off, the sealing performance of the oil cylinder is improved, oil liquid is effectively prevented from leaking out of the connecting position, meanwhile, the clamping part is located in the middle of the second sealing ring and supports the sealing ring, pressure borne by the sealing ring can be effectively reduced, and therefore the service life of the sealing ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinders, in particular to an anti-leakage oil cylinder. Background Art

[0002] Patent document CN217539171U discloses a hydraulic cylinder with an anti-leakage function, which relates to the technical field of anti-leakage hydraulic cylinder equipment. The existing hydraulic oil flows into the hydraulic cylinder through the oil inlet pipe, but foreign matter in the hydraulic oil blocks the oil inlet pipe, which is easy to cause blockage and hydraulic oil leakage. The hydraulic cylinder comprises a cylinder body and a connecting cover. The connecting cover is fixedly installed at one end of the cylinder body, and a mounting ring is fixedly provided at one end of the connecting cover. The two ends of the cylinder body are respectively fixedly provided with an oil return pipe and an oil inlet pipe, and a locking end cover is sleeved and installed at the other end of the cylinder body. A piston rod is plug-inly installed at one end of the cylinder body, and a connecting end is provided at one end of the piston rod. Through the provided sealing tube and locking end cover, when in use, the inner sealing ring and the outer sealing ring provided inside and outside the sealing tube are used to ensure the sealing of the piston rod and the cylinder body when performing reciprocating motion, thereby avoiding hydraulic oil leakage. At the same time, the provided locking end cover cooperates with the fastening bolts to reinforce the sealing of the sealing tube to avoid hydraulic oil leakage.

[0003] However, after working for a long time, the sealing ring at the connection between the piston rod and the connection cover of the oil cylinder will shake, thereby affecting the sealing effect and causing oil leakage. Therefore, it is necessary to improve such a structure to overcome the above defects. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-leakage oil cylinder to solve the problems raised in the above background technology.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A leak-proof oil cylinder comprises an oil cylinder body, the surface of which is provided with threads, and also comprises a piston rod, a piston and a cylinder cover arranged in the oil cylinder body. A threaded hole is arranged inside the cylinder cover, and the cylinder cover is connected to the surface of the oil cylinder by threads. An assembly hole is arranged in the cylinder cover, and the assembly hole passes through the cylinder cover. A sealing ring groove is arranged in the cylinder cover, and a accommodating space is arranged in the sealing ring groove. The shape of the piston rod is matched with the assembly hole of the cylinder cover, and the piston rod is movably connected to the assembly hole of the cylinder cover. The piston is sleeved on one end of the piston rod, and the piston is driven to move by the piston rod. A first sealing ring is arranged on the surface of the piston.

[0007] The utility model is further configured that an oil filling hole is arranged on one side of the oil cylinder body, and a thread is arranged in the oil filling hole.

[0008] The utility model is further configured that a second sealing ring is arranged in the sealing ring groove of the cylinder cover, a clamping portion is arranged on the side of the second sealing ring, and the clamping portion is located in the middle of the second sealing ring.

[0009] The utility model is further configured that the cross-section of the clamping portion is in the shape of a rectangle, and the clamping portion is symmetrically arranged on both sides of the second sealing ring, so that the clamping portion prevents the second sealing ring from shaking.

[0010] The utility model is further configured that a limiting portion is arranged inside the oil cylinder body, and the limiting portion extends toward the inside of the oil cylinder body.

[0011] The utility model is further configured such that the axis of the piston rod coincides with the axis of the oil cylinder body.

[0012] The utility model is further configured that a pair of first sealing rings are provided, and the first sealing rings are symmetrically sleeved on the piston surface respectively.

[0013] The advantages of the utility model are:

[0014] 1. The utility model seals the piston by arranging a pair of first sealing rings. When one of the sealing rings is worn, the other sealing ring can also complete the sealing, thereby effectively ensuring the sealing of the piston and preventing oil from leaking from the piston.

[0015] 2. The utility model seals the connection between the piston rod and the cylinder cover by arranging a second sealing ring, and by arranging a clamping part, the two sides of the cylinder cover are clamped in the sealing ring groove of the cylinder cover. The clamping part can support and clamp the sealing ring, effectively preventing it from shaking or falling off, thereby increasing the sealing performance of the oil cylinder and effectively preventing oil from leaking from the connection. At the same time, the clamping part is located in the middle position of the second sealing ring to support the sealing ring, which can effectively reduce the pressure on the sealing ring, thereby increasing the service life of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an anti-leakage oil cylinder proposed by the utility model.

[0017] Figure 2 It is a cross-sectional view of an anti-leakage oil cylinder proposed by the utility model.

[0018] Figure 3 It is a three-dimensional diagram of an anti-leakage oil cylinder proposed by the utility model.

[0019] Figure 4 It is a three-dimensional diagram of the second sealing ring proposed by the utility model.

[0020] Numeral symbols: oil cylinder body 100, oil filling hole 101, limiter 102, piston rod 110, piston 210, first sealing ring 211, cylinder cover 310, assembly hole 311, sealing ring groove 312, second sealing ring 313, clamping part 314 DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0022] like Figure 1-4 As shown, the utility model proposes a leakage-proof oil cylinder, including an oil cylinder body 100, the surface of which is provided with threads, and also includes a piston rod 110, a piston 210 and a cylinder cover 310 arranged in the oil cylinder body, a threaded hole is arranged inside the cylinder cover, the cylinder cover is connected to the surface of the oil cylinder through threads, an assembly hole 311 is arranged in the cylinder cover, the assembly hole passes through the cylinder cover, a sealing ring groove 312 is arranged in the cylinder cover, and a accommodating space is arranged in the sealing ring groove, the shape of the piston rod is adapted to the assembly hole of the cylinder cover, the piston rod is movably connected to the assembly hole of the cylinder cover, the piston is sleeved on one end of the piston rod, and the piston is driven to move by the piston rod, and a pair of first sealing rings 211 are arranged on the surface of the piston.

[0023] In this embodiment, an oil filling hole 101 is provided on one side of the oil cylinder body, and a thread is provided in the oil filling hole.

[0024] In this embodiment, a second sealing ring 313 is provided in the sealing ring groove of the cylinder head, and a clamping portion 314 is provided on the side of the second sealing ring. The clamping portion is located in the middle of the second sealing ring. Being located in the middle, the second sealing ring can be better supported, reducing the pressure on the second sealing ring, thereby reducing wear and increasing the service life of the second sealing ring.

[0025] In this embodiment, the cross-section of the clamping portion is in the shape of a rectangle. The clamping portion is symmetrically arranged on both sides of the second sealing ring, and the clamping portion prevents the second sealing ring from shaking.

[0026] In this embodiment, a limiting portion 102 is disposed inside the oil cylinder body, and the limiting portion extends toward the inside of the oil cylinder body.

[0027] In this embodiment, the axis of the piston rod coincides with the axis of the cylinder body.

[0028] In this embodiment, a pair of the first sealing rings are provided, and the first sealing rings are symmetrically sleeved on the piston surface respectively.

[0029] In the description of the present utility model, it should be noted that when terms such as "upper", "lower", "inner", "outer", "left", "right" and the like indicating orientation or positional relationship appear, it should be understood that the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, when terms such as "first" and "second" appear, they are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "setting", and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A leak-proof oil cylinder, comprising an oil cylinder body, the surface of which is provided with threads, characterized in that: It also includes a piston rod, a piston and a cylinder head arranged in the cylinder body, a threaded hole is arranged inside the cylinder head, the cylinder head is connected to the surface of the cylinder by threads, an assembly hole is arranged in the cylinder head, the assembly hole passes through the cylinder head, a sealing ring groove is arranged in the cylinder head, and a accommodating space is arranged in the sealing ring groove, the shape of the piston rod is adapted to the assembly hole of the cylinder head, the piston rod is movably connected to the assembly hole of the cylinder head, the piston is sleeved on one end of the piston rod, and the piston is driven to move by the piston rod, a first sealing ring is arranged on the surface of the piston, a second sealing ring is arranged in the sealing ring groove of the cylinder head, a clamping part is arranged on the side of the second sealing ring, and the clamping part is located in the middle of the second sealing ring.

2. The anti-leakage oil cylinder according to claim 1, characterized in that: An oil filling hole is arranged on one side of the oil cylinder body, and a thread is arranged in the oil filling hole.

3. The anti-leakage oil cylinder according to claim 1, characterized in that: The cross section of the clamping portion is in the shape of a rectangle. The clamping portion is symmetrically arranged on both sides of the second sealing ring, and the clamping portion prevents the second sealing ring from shaking.

4. The anti-leakage oil cylinder according to claim 1, characterized in that: A limiting portion is arranged inside the oil cylinder body, and the limiting portion extends toward the inside of the oil cylinder body.

5. The anti-leakage oil cylinder according to claim 1, characterized in that: The axis of the piston rod coincides with the axis of the cylinder body.

6. The anti-leakage oil cylinder according to claim 1, characterized in that: A pair of first sealing rings are provided, and the first sealing rings are symmetrically sleeved on the piston surface respectively.

Images