阅读说明：本技术 一种采用油水介质的无密封圈液压缸 (Seal-ring-free hydraulic cylinder adopting oil-water medium ) 是由 陈海燕 于 2019-11-19 设计创作，主要内容包括：本发明提供一种采用油水介质的无密封圈液压缸,包括：缸筒体；缸盖固定安装于缸筒体的一端,缸盖上开设有第一进出液孔。本发明提供的采用油水介质的无密封圈液压缸具有通过在缸盖、活塞块之间设置密封布,使进入缸筒体内部的液体始终在密封布、缸筒体、缸盖和活塞块之间形成的腔体中,液体不会与活塞杆进行接触,即不需要在活塞杆与缸盖之间设置密封圈,不会存在密封圈在长期使用后损坏没出现液体漏出的问题,且通过在密封布的外侧与缸筒体的内壁之间设置多个限位组件,对密封布进行支撑,减小密封布对液体承载的力,且配合折横,防止密封布在跟随往复移动的过程中内侧不会与活塞杆接触,产生摩擦,延长密封布的使用寿命。(The invention provides a seal-ring-free hydraulic cylinder adopting an oil-water medium, which comprises: a cylinder body; the cylinder cover is fixedly arranged at one end of the cylinder body, and a first liquid inlet and outlet hole is formed in the cylinder cover. The sealing cloth is arranged between the cylinder cover and the piston block, so that liquid entering the cylinder body is always in a cavity formed by the sealing cloth, the cylinder body, the cylinder cover and the piston block, the liquid cannot contact with the piston rod, namely, the sealing cloth does not need to be arranged between the piston rod and the cylinder cover, the problem that the sealing cloth is damaged and does not leak the liquid after long-term use is solved, the sealing cloth is supported by arranging the plurality of limiting assemblies between the outer side of the sealing cloth and the inner wall of the cylinder body, the force of the sealing cloth on the liquid is reduced, the sealing cloth is folded transversely in a matching mode, the inner side of the sealing cloth cannot contact with the piston rod in the process of moving back and forth, friction is generated, and the service life of the sealing cloth is prolonged.)

1. The utility model provides an adopt no sealing washer pneumatic cylinder of profit medium which characterized in that includes:

a cylinder body;

the cylinder cover is fixedly arranged at one end of the cylinder body, a first liquid inlet and outlet hole is formed in the cylinder cover, and a second liquid inlet and outlet hole is formed in the other end of the cylinder body;

the piston block is connected to the inner wall of the cylinder body in a sliding mode, and a piston rod is fixedly connected to one side of the piston block;

the sealing assembly is fixedly connected with the cylinder cover and the piston block, and one side of the sealing assembly is in sliding connection with the inner surface of the cylinder body through a limiting assembly.

2. The sealless hydraulic cylinder using oil-water media according to claim 1, wherein a first fixing groove is formed in one side of the cylinder cover located inside the cylinder body, a second fixing groove is formed in one side of the piston block, and the first fixing groove and the second fixing groove are both annular grooves.

3. The seal-ring-free hydraulic cylinder adopting an oil-water medium as claimed in claim 2, wherein the sealing assembly comprises a sealing cloth, connecting pieces are fixedly connected to both ends of the sealing cloth, the sealing cloth is cylindrical, and the two connecting pieces are respectively fixed inside the first fixing groove and the second fixing groove through glue.

4. The sealless hydraulic cylinder according to claim 3, wherein the sealing cloth has a fold-over cross.

5. The seal-ring-free hydraulic cylinder adopting the oil-water medium is characterized in that the limiting assembly comprises four sliding grooves, the four sliding grooves are arranged on the inner wall of the cylinder body in a centrosymmetric manner, and a first sliding block is connected to the inner parts of the sliding grooves in a sliding manner.

6. The sealless hydraulic cylinder according to claim 5, wherein a connecting rod is fixedly connected to the bottom of the first sliding block, a connecting ring is fixedly connected to the bottom end of the connecting rod, and the connecting ring is fixedly connected to the sealing cloth through a fixing band.

7. The sealless hydraulic cylinder according to claim 1, wherein a second slide block is disposed on the surface of the piston block at a position corresponding to the slide groove.

Technical Field

The invention relates to the field of hydraulic cylinders, in particular to a seal-ring-free hydraulic cylinder adopting an oil-water medium.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When it is used to implement reciprocating motion, it can omit speed-reducing device, and has no transmission gap, and its motion is stable, so that it can be extensively used in various mechanical hydraulic systems. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device. The damping device and the exhaust device are determined according to specific application occasions, and other devices are necessary.

The variety of pneumatic cylinder is multiple, including the pneumatic cylinder that uses oil water medium, and the piston rod of current pneumatic cylinder all is provided with the sealing washer with the cylinder cap department of running through, seals it, prevents that oil water medium from flowing, but the piston rod is using for a long time, produces friction many times between sealing washer and the piston rod, and after the friction many times, the sealing washer damages easily, leads to oil water medium to spill.

Therefore, it is necessary to provide a sealless hydraulic cylinder using an oil-water medium to solve the above problems.

Disclosure of Invention

The invention provides a seal ring-free hydraulic cylinder adopting an oil-water medium, which solves the problems that the oil-water medium is leaked due to the fact that friction is generated between a seal ring and a piston rod for many times when the hydraulic cylinder is used for a long time, and the seal ring is easy to damage after the friction is generated for many times.

In order to solve the technical problem, the invention provides a seal-ring-free hydraulic cylinder using an oil-water medium, which comprises:

a cylinder body;

the cylinder cover is fixedly arranged at one end of the cylinder body, a first liquid inlet and outlet hole is formed in the cylinder cover, and a second liquid inlet and outlet hole is formed in the other end of the cylinder body;

the piston block is connected to the inner wall of the cylinder body in a sliding mode, and a piston rod is fixedly connected to one side of the piston block;

the sealing assembly is fixedly connected with the cylinder cover and the piston block, and one side of the sealing assembly is in sliding connection with the inner surface of the cylinder body through a limiting assembly.

Preferably, a first fixing groove is formed in one side, located inside the cylinder body, of the cylinder cover, a second fixing groove is formed in one side of the piston block, and the first fixing groove and the second fixing groove are both annular grooves.

Preferably, seal assembly includes sealed cloth, the equal fixedly connected with connecting piece in both ends of sealed cloth, sealed cloth is cylindric, two the connecting piece is fixed in respectively through glue inside first fixed slot and the second fixed slot.

Preferably, the sealing cloth is provided with a folding cross.

The transverse-matching limiting assembly is arranged on the sealing cloth, so that the sealing cloth is prevented from contacting with the piston rod at the inner side of the process of following the reciprocating movement, friction is generated, and the service life of the sealing cloth is prolonged.

Preferably, the limiting assembly comprises four sliding grooves which are arranged on the inner wall of the cylinder body in a centrosymmetric manner, and a first sliding block is connected to the inner parts of the sliding grooves in a sliding manner.

Preferably, the bottom of the first sliding block is fixedly connected with a connecting rod, the bottom end of the connecting rod is fixedly connected with a connecting ring, and the connecting ring is fixedly connected with the sealing cloth through a fixing band.

Preferably, a second sliding block is arranged on the surface of the piston block corresponding to the sliding groove.

Compared with the prior art, the seal-ring-free hydraulic cylinder adopting the oil-water medium has the following beneficial effects:

the invention provides a seal-ring-free hydraulic cylinder adopting an oil-water medium, wherein seal cloth is arranged between a cylinder cover and a piston block, so that liquid entering the cylinder body is always in a cavity formed by the seal cloth, the cylinder body, the cylinder cover and the piston block, the liquid can not contact with a piston rod, namely, a seal ring is not required to be arranged between the piston rod and the cylinder cover, the problem that the seal ring is damaged and the liquid does not leak after long-term use is solved, the seal cloth can be supported by arranging a plurality of limiting assemblies between the outer side of the seal cloth and the inner wall of the cylinder body, the bearing capacity of the seal cloth on the liquid is reduced, the seal cloth is matched with a transverse folding structure, the inner side of the seal cloth can not contact with the piston rod in the process of following reciprocating movement, friction is generated, and the service life of the.

Drawings

FIG. 1 is a schematic structural diagram of a preferred embodiment of a sealless hydraulic cylinder using an oil-water medium according to the present invention;

FIG. 2 is a schematic view of the exterior of the cylinder body shown in FIG. 1;

figure 3 is a cross-sectional view of the cylinder body shown in figure 1.

Reference numbers in the figures: 1. the cylinder body, 2, a cylinder cover, 3, a first liquid inlet and outlet hole, 4, a second liquid inlet and outlet hole, 5, a sealing component, 51, sealing cloth, 52, a folding cross piece, 53, a connecting piece, 6, a limiting component, 61, a sliding groove, 62, a first sliding block, 63, a connecting rod, 64, a connecting ring, 7, a piston rod, 8, a second sliding block, 9, a first fixing groove, 10, a second fixing groove, 11 and a piston block.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Please refer to fig. 1, fig. 2 and fig. 3 in combination, wherein fig. 1 is a schematic structural diagram of a seal-ring-free hydraulic cylinder using an oil-water medium according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of the exterior of the cylinder body shown in FIG. 1; figure 3 is a cross-sectional view of the cylinder body shown in figure 1. Adopt no sealing washer pneumatic cylinder of profit medium includes:

a cylinder body 1;

the cylinder cover 2 is fixedly arranged at one end of the cylinder body 1, a first liquid inlet and outlet hole 3 is formed in the cylinder cover 2, and a second liquid inlet and outlet hole 4 is formed in the other end of the cylinder body 1;

the piston block 11 is connected to the inner wall of the cylinder body 1 in a sliding mode, and one side of the piston block 11 is fixedly connected with a piston rod 7;

the sealing assembly 5 is fixedly connected to the cylinder cover 2 and the piston block 11, and one side of the sealing assembly 5 is in sliding connection with the inner surface of the cylinder body 1 through the limiting assembly 5.

The number of the limiting assemblies 5 is provided with a plurality of limiting assemblies, the specific number can be specifically set according to the length of the cylinder body 1, and the spacing distance between the adjacent limiting assemblies 5 is preferably two centimeters.

The cylinder cover 2 is located a first fixing groove 9 is formed in one side of the inside of the cylinder body 1, a second fixing groove 10 is formed in one side of the piston block 11, and the first fixing groove 9 and the second fixing groove 10 are both annular grooves.

By providing the first fixing groove 9 and the second fixing groove 10 for fixing the sealing member 5, the sealing property and the firmness of the fixing portion can be improved.

The sealing assembly 5 comprises a sealing cloth 51, connecting pieces 53 are fixedly connected to two ends of the sealing cloth 51 respectively, the sealing cloth is cylindrical, and the connecting pieces 53 are fixed inside the first fixing groove 9 and the second fixing groove 10 through glue.

The thickness of two connecting pieces 53 is less than the inner cavity width of first fixed slot 9 and second fixed slot 10, and the size of two fixed slots 10 is the same, and two connecting pieces 53 are fixed through filling glue in two fixed slots.

The sealing cloth 51 is provided with a folding cross part 52.

The number of the folding cross pieces 52 is provided with a plurality, and each folding cross piece is positioned between two limiting assemblies 5.

The limiting assembly 5 comprises four sliding grooves 61, the four sliding grooves 61 are arranged on the inner wall of the cylinder body 1 in a centrosymmetric mode, and a first sliding block 62 is connected to the inside of each sliding groove 61 in a sliding mode.

The sliding groove 61 is a T-shaped sliding groove, the first sliding block 62 and the second sliding block 8 are both adaptive T-shaped sliding blocks, and the contact surface of the inner surface of the sliding groove 61 and the T-shaped sliding blocks is smoothly arranged.

The bottom of the first sliding block 62 is fixedly connected with a connecting rod 63, the bottom end of the connecting rod 63 is fixedly connected with a connecting ring 64, and the connecting ring 64 is fixedly connected with the sealing cloth 51 through a fixing band.

The bottom end of the connecting rod 63 is fixed with the connecting ring 64 by a fixing band.

The surface of the piston block 11 is provided with a second slide block 8 at a position corresponding to the slide groove 61.

The piston block 11 is provided with the second sliding block 8 correspondingly, so that the sealing performance of the piston block 11 can be improved, meanwhile, the first sliding block 62 can be pushed through the second sliding block 8, the sealing cloth 51 is driven to be folded or unfolded, and the bearing capacity of the joint of the sealing cloth 51 and the piston block 11 under tension is reduced.

The working principle of the seal-ring-free hydraulic cylinder adopting the oil-water medium is as follows:

by arranging the sealing cloth 51 between the piston block 11 and the cylinder cover 2 and outside the piston rod 7, after an oil-water medium enters the cylinder body 1 through the first liquid inlet and outlet hole 3 and the second liquid inlet and outlet hole 4, the oil-water medium is positioned in a cavity formed among the sealing cloth 51, the cylinder body 1, the cylinder cover 2 and the piston block 11, and the liquid cannot contact with the piston rod 1;

the sealing cloth 51 can be supported through the plurality of limiting assemblies, meanwhile, when the piston rod 7 extends outwards, the piston block 11 drives the sealing cloth 51 to be folded, the piston block 11 pushes the first slide block 62 to be folded towards one side along with the sealing cloth 51 through the second slide block 8 on the side, the folding cross part 52 is arranged on the sealing cloth 51, the outer side of the folding cross part is folded, and the sealing cloth is folded towards the outer side at the folding cross part when being folded;

when the piston rod 7 moves towards the inner side of the cylinder body 1, the piston block 11 drives the sealing cloth 51 to expand;

meanwhile, the transverse folding and limiting assembly 5 is arranged, so that the sealing cloth 51 is prevented from being contacted with the piston rod 7 at the inner side in the process of following reciprocating movement, friction is generated, and the service life of the sealing cloth 51 is prolonged.

Compared with the prior art, the seal-ring-free hydraulic cylinder adopting the oil-water medium has the following beneficial effects:

through at cylinder cap 2, set up sealed cloth between piston block 11, make the liquid that gets into cylinder body 1 inside all the time sealed cloth 51, cylinder body 1, in the cavity that forms between cylinder cap 2 and the piston block 11, liquid can not contact with piston rod 1, need not set up the sealing washer between piston rod 1 and cylinder cap 2 promptly, there is not the problem that the sealing washer damages after long-term the use and does not appear liquid and spill, and through set up a plurality of spacing subassemblies 5 between the outside of sealed cloth 51 and the inner wall of cylinder body 1, can support sealed cloth, reduce the power that sealed cloth 51 bore to liquid, and the cooperation is rolled over violently 52, can prevent sealed cloth 51 can not contact with piston rod 7 at the in-process inboard of following reciprocating motion, produce the friction, prolong sealed cloth 51's life.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.