CN112855653A

CN112855653A - Sealed double-acting single-piston-rod hydraulic cylinder

Info

Publication number: CN112855653A
Application number: CN202110013251.3A
Authority: CN
Inventors: 徐杰; 张艺峰
Original assignee: Anhui Dingtu Hydraulic Equipment Co ltd
Current assignee: Anhui Dingtu Hydraulic Equipment Co ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-05-28
Anticipated expiration: 2041-01-06
Also published as: CN112855653B

Abstract

The invention relates to the technical field of hydraulic cylinders and discloses a sealed double-acting single-piston-rod hydraulic cylinder which comprises a cylinder body, wherein a limiting groove is formed in the inner side surface of the cylinder body at an equal angle, a movable block is movably sleeved in the cylinder body, a limiting block is fixedly arranged on the outer side surface of the movable block at an equal angle, and the movable block is movably clamped with the limiting groove through the limiting block. The sealed double-acting single-piston-rod hydraulic cylinder has the advantages that the sliding block is movably clamped in the sliding groove, when the piston rod is subjected to lateral impact force, the supporting block above the fixed block is subjected to pressure immediately, the supporting spring positioned at the bottom end of the supporting block is subjected to pressure immediately and is compressed correspondingly at the moment, the upper movable frame is driven to move downwards, the upper movable frame can be driven to rotate relative to the lower movable frame under the driving of the rotating shaft, the sliding block is driven to move relative to the sliding groove to offset partial impact force, the impact force on the piston rod is relieved, and the impact force can be reduced when the piston rod is subjected to lateral impact.

Description

Sealed double-acting single-piston-rod hydraulic cylinder

Technical Field

The invention relates to the technical field of hydraulic cylinders, in particular to a sealed double-acting single-piston-rod hydraulic cylinder.

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 hydraulic cylinder is an actuating element in a hydraulic transmission system and is an energy conversion device for converting hydraulic energy into mechanical energy. The hydraulic motor performs a continuous rotary motion, while the hydraulic cylinder performs a reciprocating motion. The hydraulic cylinder has three types, namely a piston cylinder, a plunger cylinder and a swing cylinder, wherein the piston cylinder and the plunger cylinder realize reciprocating linear motion and output speed and thrust, and the swing cylinder realizes reciprocating swing and outputs angular speed (rotating speed) and torque. The hydraulic cylinder may be used in combination of two or more or in combination with other mechanisms, in addition to being used singly. To accomplish a particular function. The hydraulic cylinder has simple structure and reliable work and is widely applied to a hydraulic system of a machine tool. The hydraulic cylinder has various structural forms, and the classification method thereof also has various types: the motion mode can be divided into a linear reciprocating motion type and a rotary swinging type; the hydraulic pressure can be divided into a single-acting type and a double-acting type according to the action condition of the hydraulic pressure; according to the structural form, the device can be divided into a piston type, a plunger type, a multi-stage telescopic sleeve type, a rack and pinion type and the like; the device can be divided into a pull rod, an earring, a bottom foot, a hinge shaft and the like according to the installation form.

The single piston rod hydraulic cylinder used at present is simple in structure, the interior of the single piston rod hydraulic cylinder is mainly composed of the single piston rod and the cylinder body, the piston rod can be driven to stretch and retract relative to the cylinder body through pushing of hydraulic oil, and when the structure is in actual use and the interior of the hydraulic cylinder is not filled with the hydraulic oil, the hydraulic cylinder is subjected to lateral impact force, and collision between the hydraulic rod and the cylinder body is easily caused due to the fact that the interior of the hydraulic cylinder is not provided with a device for buffering the lateral impact force, and the phenomenon of damage to the hydraulic rod or the cylinder body is easily caused.

Meanwhile, the hydraulic cylinder mainly utilizes hydraulic oil to push the piston rod to move relatively, when the cylinder body is filled with hydraulic oil, the piston rod can be driven to move continuously relative to the cylinder body through frequent filling and reduction of the content of the hydraulic oil, when the hydraulic oil is frequently introduced, the phenomenon of overheating inside the cylinder body is easily caused, and when the temperature of metal is too high, the phenomenon of thermal attenuation is easily caused, so that the movement stroke of the hydraulic cylinder is influenced to a certain degree.

The hydraulic cylinder can be provided with the oil blanket in the junction of cylinder body and piston rod in order to guarantee the leakproofness of device and guarantee the leakproofness of cylinder body, nevertheless because the service environment of hydraulic cylinder is comparatively complicated, very easily leads to the surface of piston rod to be infected with certain dust or debris when using under comparatively abominable environment, will lead to debris and dust to get into the inside of hydraulic cylinder when the piston rod withdraws the inside of hydraulic rod this moment, causes great influence easily to the leakproofness of hydraulic cylinder.

Disclosure of Invention

The invention provides a sealed double-acting single-piston-rod hydraulic cylinder which has the advantages of reducing the impact force of a piston rod when the piston rod is impacted laterally, preventing the cylinder body from overheating during working and cleaning the surface of the piston rod, and solves the problems in the background art.

The invention provides the following technical scheme: the utility model provides a two effect single piston rod pneumatic cylinders of canned type, includes the cylinder body, the spacing groove has been seted up to angles such as cylinder body medial surface, the inside activity of cylinder body has cup jointed the movable block, angle fixed mounting such as the lateral surface of movable block has the stopper, the movable block passes through stopper and spacing groove activity joint, the positive fixed mounting of movable block has the piston rod, the bottom of piston rod lateral surface is impartial apart from fixed mounting has the fixed block, the spout has all been seted up at both ends about the fixed block, the top of fixed block is equipped with the supporting shoe, the lateral surface of supporting shoe contacts with the medial surface of cylinder.

Preferably, the condenser pipe is installed in the lateral surface winding of cylinder body, the lateral surface fixed mounting of cylinder body has the protective housing that is located the condenser pipe lateral surface, the top fixed mounting of cylinder body has the water storage box, the other end of condenser pipe and the inside fixed intercommunication of water storage box.

Preferably, the top end of the piston rod penetrates through the bottom end of the cylinder body and is fixedly provided with a piston plate, and the middle part of the top end of the cylinder body is fixedly communicated with an oil filling opening.

Preferably, the bottom of cylinder body is equipped with the clean ring that is located the piston rod left and right sides, two the shape of clean ring is semi-circular, two the mounting groove has all been seted up at the upper and lower both ends of clean ring, two clean ring has magnet through mounting groove adsorption connection.

Preferably, the one end fixed mounting of stopper has the second buffer spring who is located the inside of spacing groove, the bottom of second buffer spring and the bottom fixed connection of spacing groove, the bottom fixed mounting of movable block has the first buffer spring who is located the inside of cylinder body, the bottom of first buffer spring and the bottom fixed connection of cylinder body inner chamber, the bottom fixed mounting of movable block has the blotter.

Preferably, the inside movable mounting of spout has the slider, the one end fixed mounting of slider has lower adjustable shelf, the top of adjustable shelf is equipped with the adjustable shelf down, go up the adjustable shelf and be equipped with the pivot down between the adjustable shelf, go up the adjustable shelf and rotate through the pivot with lower adjustable shelf and connect.

Preferably, the top end of the upper movable frame is fixedly connected with the bottom end of the supporting block, a supporting spring is fixedly mounted at the bottom end of the upper movable frame, and the bottom end of the supporting spring is fixedly connected with the top end of the fixed block.

The invention has the following beneficial effects:

1. the sealed double-acting single-piston-rod hydraulic cylinder is characterized in that a limit groove is arranged in the inner cavity of the cylinder body, a movable block is movably sleeved in the cylinder body, the movable block is movably clamped with the limit groove through the limit block, and a piston rod is fixed at one end of the movable block, a fixed block is fixed on the outer side surface of the piston rod, sliding grooves are arranged at the two ends of the fixed block, sliding blocks are movably clamped in the sliding grooves, when the piston rod is subjected to lateral impact force, the supporting block positioned above the fixed block is subjected to pressure immediately, the supporting spring positioned at the bottom end of the supporting block is subjected to pressure immediately and is compressed correspondingly to drive the upper movable frame to displace downwards, and the upper movable frame can be driven to rotate relative to the lower movable frame under the drive of the rotating shaft so as to drive the sliding block to displace relative to the sliding groove to offset partial impact force, so that the impact force on the piston rod is reduced, and the advantage that the impact force can be reduced when the piston rod is subjected to lateral impact is realized.

2. This two effect single piston rod pneumatic cylinder of canned type, there is the protective housing through lateral surface fixed mounting at the cylinder body, and install the condenser pipe in the lateral surface winding of cylinder body, and then be fixed with the water storage box on the top of cylinder body, fixed intercommunication between condenser pipe and the water storage box simultaneously, can produce a large amount of heats when the cylinder body during operation, the heat just can conduct the lateral surface to the cylinder body this moment, and absorbed by the condenser pipe, carry out the heat transfer and take away most heats with inside comdenstion water, avoid the inside overheat phenomenon of cylinder body to appear, thereby realized can prevent that overheat phenomenon's advantage from appearing in the cylinder body during operation.

3. This two effect single piston rod pneumatic cylinders of canned type, be equipped with clean ring through the front at the cylinder body, and the shape of clean ring is semi-circular, the mounting groove has all been seted up at the upper and lower both ends of two clean rings, and the upper and lower both ends of two clean rings are then connected the installation of accomplishing two clean rings through adsorbing between magnet and the mounting groove, accessible removal piston rod when the surface attachment of piston rod has the dust, at this moment because contact between the medial surface of piston rod surface and clean ring, can clear up the dust of piston rod surface because of the friction promptly at the displacement in-process, can accomplish the dismantlement of two clean rings through dismantling magnet and rinse it, thereby realized and carried out clear advantage to the piston rod surface.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the cleaning ring and magnet arrangement of the present invention;

FIG. 3 is an exploded view of the protective shell and reservoir configuration of the present invention;

FIG. 4 is a cross-sectional view of the internal structure of the present invention;

fig. 5 is an enlarged schematic view of the structure at a in fig. 4.

In the figure: 1. a cylinder body; 2. a protective shell; 3. a condenser tube; 4. a water storage tank; 5. an oil filling port; 6. a piston rod; 7. a piston plate; 8. a limiting groove; 9. a first buffer spring; 10. a second buffer spring; 11. a movable block; 12. a limiting block; 13. cleaning the ring; 14. mounting grooves; 15. a magnet; 16. a fixed block; 17. a chute; 18. a slider; 19. an upper movable frame; 20. a lower movable frame; 21. a support block; 22. a support spring; 23. a rotating shaft; 24. a cushion pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a sealed double-acting single-piston-rod hydraulic cylinder comprises a cylinder body 1, wherein a limiting groove 8 is formed in the inner side surface of the cylinder body 1 at equal angles, a movable block 11 is movably sleeved in the cylinder body 1, a limiting block 12 is fixedly installed on the outer side surface of the movable block 11 at equal angles, the movable block 11 is movably clamped with the limiting groove 8 through the limiting block 12, a piston rod 6 is fixedly installed on the front surface of the movable block 11, a fixed block 16 is fixedly installed at the bottom end of the outer side surface of the piston rod 6 at equal distances, sliding grooves 17 are formed in the left end and the right end of the fixed block 16, a supporting block 21 is arranged at.

Wherein, condenser pipe 3 is installed in the winding of the lateral surface of cylinder body 1, the lateral surface fixed mounting of cylinder body 1 has the protective housing 2 that is located the 3 lateral surfaces of condenser pipe, the top fixed mounting of cylinder body 1 has water storage box 4, the other end of condenser pipe 3 and the fixed intercommunication in inside of water storage box 4, the produced heat of cylinder body 1 during operation just can conduct the lateral surface to cylinder body 1, and absorb by condenser pipe 3, carry out the heat transfer and take away most heat with inside comdenstion water, avoid cylinder body 1's inside overheat phenomenon to appear.

Wherein, the top of piston rod 6 runs through the bottom and the fixed mounting of cylinder body 1 has piston plate 7, and the fixed intercommunication in middle part on cylinder body 1 top has oiling mouth 5, and accessible oiling mouth 5 pours into hydraulic oil into and realizes promoting the relative cylinder body 1 of movable block 11 between the displacement.

Wherein, the bottom of cylinder body 1 is equipped with the clean ring 13 that is located the piston rod 6 left and right sides, the shape of two clean rings 13 is semi-circular, mounting groove 14 has all been seted up at the upper and lower both ends of two clean rings 13, two clean rings 13 are connected with magnet 15 through mounting groove 14 absorption, when piston rod 6 retrieves, because contact is carried out between the medial surface of piston rod 6 surface and clean ring 13, can accomplish the dismantlement of two clean rings 13 and wash it because of the friction promptly at the displacement in-process because the dust of piston rod 6 surface is cleared up, through dismantling magnet 15.

Wherein, the one end fixed mounting of stopper 12 has the second buffer spring 10 that is located the inside of spacing groove 8, the bottom of second buffer spring 10 and the bottom fixed connection of spacing groove 8, the bottom fixed mounting of movable block 11 has the first buffer spring 9 that is located the inside of cylinder body 1, the bottom of first buffer spring 9 and the bottom fixed connection of the 1 inner chamber of cylinder body, the bottom fixed mounting of movable block 11 has blotter 24, when piston rod 6 retrieves, the first buffer spring 9 that is located the 11 bottom of movable block and the second buffer spring 10 that is located the inside of spacing groove 8 are immediately compressed and are cushioned piston rod 6's recovery, simultaneously blotter 24 also continues to absorb the impact force and further cushion it, and the service life is prolonged.

Wherein, the inside movable mounting of spout 17 has slider 18, and the one end fixed mounting of slider 18 has lower movable frame 20, and the top of lower movable frame 20 is equipped with adjustable shelf 19, goes up and is equipped with pivot 23 between adjustable shelf 19 and the lower movable frame 20, goes up adjustable shelf 19 and rotates through pivot 23 with lower movable frame 20 and connect, goes up adjustable shelf 19 and lower movable frame 20 and can rotate relatively, can drive slider 18 and carry out the displacement relative spout 17 when lower movable shelf 20 rotates relatively last adjustable shelf 19.

The top end of the upper movable frame 19 is fixedly connected with the bottom end of the supporting block 21, the bottom end of the upper movable frame 19 is fixedly provided with a supporting spring 22, the bottom end of the supporting spring 22 is fixedly connected with the top end of the fixed block 16, when the piston rod 6 is subjected to lateral impact force, the supporting block 21 above the fixed block 16 is immediately subjected to pressure, the supporting spring 22 at the bottom end of the supporting block 21 is immediately subjected to pressure and correspondingly compressed to drive the upper movable frame 19 to move downwards, at the moment, the upper movable frame 19 can be driven to rotate relative to the lower movable frame 20 under the drive of the rotating shaft 23 so as to drive the sliding block 18 to move relative to the sliding chute 17 to offset partial impact force, and the impact.

When the sealed double-acting single-piston-rod hydraulic cylinder is used, hydraulic oil can be injected through the oil injection port 5 to push the movable block 11 to displace relative to the cylinder body 1 and drive the piston rod 6 to expand and contract, heat generated during the operation of the cylinder body 1 is transferred to the outer side surface of the cylinder body 1 and absorbed by the condenser pipe 3 to exchange heat with internal condensate water and take away most of the heat, so that the phenomenon of overheating inside the cylinder body 1 is avoided, when the piston rod 6 is subjected to lateral impact force, the supporting block 21 positioned above the fixed block 16 is subjected to pressure immediately, the supporting spring 22 positioned at the bottom end of the supporting block 21 is subjected to pressure immediately and is compressed correspondingly to drive the upper movable frame 19 to displace downwards, and at the moment, the upper movable frame 19 can be driven by the rotating shaft 23 to rotate relative to the lower movable frame 20 so as to drive the slide block 18 to displace relative to the chute, the impact force to the piston rod 6 is slowed down, when the piston rod 6 is recovered, because the surface of the piston rod 6 is contacted with the inner side faces of the cleaning rings 13, the dust on the outer surface of the piston rod 6 is cleaned up due to friction in the displacement process, the two cleaning rings 13 can be cleaned by disassembling the magnet 15, meanwhile, the first buffer spring 9 positioned at the bottom end of the movable block 11 and the second buffer spring 10 positioned in the limiting groove 8 are compressed immediately to buffer the recovery of the piston rod 6, meanwhile, the buffer cushion 24 can also continue to absorb the impact force to further buffer the piston rod, and the service life is prolonged.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a two effect single piston rod pneumatic cylinders of canned type, includes cylinder body (1), its characterized in that: spacing groove (8) have been seted up to angles such as cylinder body (1) medial surface, movable block (11) have been cup jointed in the inside activity of cylinder body (1), angle fixed mounting such as lateral surface of movable block (11) has stopper (12), movable block (11) are through stopper (12) and spacing groove (8) activity joint, the positive fixed mounting of movable block (11) has piston rod (6), the impartial distance fixed mounting in bottom of piston rod (6) lateral surface has fixed block (16), spout (17) have all been seted up at both ends about fixed block (16), the top of fixed block (16) is equipped with supporting shoe (21), the lateral surface of supporting shoe (21) contacts with the medial surface of cylinder body (1).

2. A sealed, double-acting, single-piston-rod hydraulic cylinder according to claim 1, wherein: condenser pipe (3) are installed in the lateral surface winding of cylinder body (1), the lateral surface fixed mounting of cylinder body (1) has protective housing (2) that are located condenser pipe (3) lateral surface, the top fixed mounting of cylinder body (1) has water storage box (4), the other end of condenser pipe (3) and the inside fixed intercommunication of water storage box (4).

3. A sealed, double-acting, single-piston-rod hydraulic cylinder according to claim 1, wherein: the top end of the piston rod (6) penetrates through the bottom end of the cylinder body (1) and is fixedly provided with a piston plate (7), and the middle of the top end of the cylinder body (1) is fixedly communicated with an oil filling opening (5).

4. A sealed, double-acting, single-piston-rod hydraulic cylinder according to claim 1, wherein: the bottom of cylinder body (1) is equipped with clean ring (13) that are located piston rod (6) left and right sides, two the shape of clean ring (13) is semi-circular, two mounting groove (14) have all been seted up at the upper and lower both ends of clean ring (13), two clean ring (13) are connected with magnet (15) through mounting groove (14) adsorption.

5. A sealed, double-acting, single-piston-rod hydraulic cylinder according to claim 1, wherein: the one end fixed mounting of stopper (12) has second buffer spring (10) that is located the inside of spacing groove (8), the bottom of second buffer spring (10) and the bottom fixed connection of spacing groove (8), the bottom fixed mounting of movable block (11) has and is located inside first buffer spring (9) of cylinder body (1), the bottom of first buffer spring (9) and the bottom fixed connection of cylinder body (1) inner chamber, the bottom fixed mounting of movable block (11) has blotter (24).

6. A sealed, double-acting, single-piston-rod hydraulic cylinder according to claim 1, wherein: the inside movable mounting of spout (17) has slider (18), the one end fixed mounting of slider (18) has down adjustable shelf (20), the top of adjustable shelf (20) is equipped with adjustable shelf (19) down, it is equipped with pivot (23) to go up between adjustable shelf (19) and lower adjustable shelf (20), it rotates through pivot (23) to go up adjustable shelf (19) and lower adjustable shelf (20) and connects.

7. The sealed, double-acting, single-piston-rod hydraulic cylinder of claim 6, wherein: the top end of the upper movable frame (19) is fixedly connected with the bottom end of the supporting block (21), the bottom end of the upper movable frame (19) is fixedly provided with a supporting spring (22), and the bottom end of the supporting spring (22) is fixedly connected with the top end of the fixed block (16).