CN114017415A

CN114017415A - Hydraulic oil cylinder

Info

Publication number: CN114017415A
Application number: CN202111286289.4A
Authority: CN
Inventors: 陈金祥; 王克宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-02-08

Abstract

The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder, which comprises a double-lug ring, an end cover, a cylinder barrel, a damping spring and a base, wherein the double-lug ring is arranged at the top of the end cover, the cylinder barrel is fixed in the middle of the end cover, the damping spring is wound outside the cylinder barrel, the lower end of the damping spring is fixed on the bottom of the end cover, the lower end of the end cover is fixedly welded above the base, a pressure rod transmits external downward pressure which can be transmitted to a piston sleeve, a plug on the piston sleeve can be extruded downwards, oil can flow into an oil storage tank, flows through an oil discharge port and then flows into a lower half pipeline through the transportation of an upper part pipeline, then converges into the bottom of the cylinder through an oil delivery valve, flows into the top of the cylinder again through an oil return pipeline and then flows back again, in the process, the inner wall of the cylinder can be lubricated through an oil delivery pipeline network which is complicated in the cylinder, the pressure is reduced, the inner wall of the cylinder body is protected, and the service life of the cylinder body is prolonged.

Description

Hydraulic oil cylinder

Technical Field

The invention relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion; the hydraulic oil cylinder has the advantages of simple structure, reliable work, no transmission clearance, stable movement and the like, is widely applied to hydraulic systems of various machines, has a plurality of advantages, but also has certain problems when in use, and is particularly shown to have the following problems when in use: a. when the hydraulic oil cylinder works, when an external mechanism extrudes downwards, the wall of the oil cylinder causes the instability of the cylinder body of the oil cylinder during extrusion and is easy to sideslip; b. when the external ear ring of the support at the top of the oil cylinder is connected with an external object, the external ear ring is easy to shake after specific practical operation, and potential safety hazards are easy to cause; c. the inner wall of the cylinder body cannot be effectively lubricated at any time due to long-time work, so that the phenomenon of dry grinding is caused, and the service life of the oil cylinder is influenced by long-time work.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a hydraulic oil cylinder.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a hydraulic cylinder, includes earrings, end cover, cylinder, damping spring and base, its characterized in that: the double lug rings are arranged at the top of the end cover, the cylinder barrel is fixed in the middle of the end cover, the damping spring winds the outside of the cylinder barrel, the lower end of the damping spring is fixed on the bottom of the end cover, and the lower end of the end cover is fixedly welded above the base;

two side surfaces of the double-ear ring are respectively provided with symmetrical outer ear rings, the two symmetrical outer ear rings are connected through a rotating shaft, the middle part of the rotating shaft penetrates through the other symmetrical inner ear ring, the inner ear rings are fixedly connected to the rotating shaft, the middle part of each inner ear ring is locked on the rotating shaft through a fixing ring, similarly, the outer ear rings are also used for locking the rotating shaft by using the same principle, the side surfaces of the outer ear rings are connected with guide rings, and piston rods are arranged below the guide rings;

a limiting ring is arranged above the limiting mechanism, the lower end of the limiting ring is connected with a moving rod, the bottom of the moving rod is soaked in the oil tank and is in an inverted triangle shape, and oil pipelines are symmetrically arranged on two sides of the oil tank;

the connecting rod is arranged above the oil seal block, the sliding teeth are arranged on the right side of the connecting rod, the locking teeth meshed with the sliding teeth are arranged on the pull rod on the right side of the sliding teeth, the lower end of the pull rod is welded with an extension rod, a row of corrugated pipes are arranged below the connecting rod, and the right lower end of each corrugated pipe is connected with a pipe orifice.

Preferably, the end cover is divided into an upper part and a lower part, and is connected with the upper end face and the lower end face, the upper end face of the end cover is connected with the double-lug ring, the lower part of the cylinder barrel is connected with the upper part of the cylinder barrel, the lower end face of the end cover is connected with the lower support column of the damping spring and the lower part of the cylinder barrel, the lower part of the end cover is connected with the base, the outermost side of the end cover is provided with a cover wall, a shaft seat is arranged around the inner part of one circle of the cover wall, and a movable cylinder is arranged in the middle of the shaft seat.

Preferably, the transmission mechanism is arranged above the upper half part inside the transverse cutting plane of the cylinder barrel, the limiting mechanism is connected below the transmission mechanism, the piston sleeve is arranged in the middle of the lower portion of the transmission mechanism, the oil storage pipe is connected above the piston sleeve, the oil storage tanks are installed on two sides of the cylinder barrel, the oil discharge port is arranged at the upper pipe orifice of each oil storage tank, each oil path pipe is arranged on the lower half portion of the cylinder barrel, the oil delivery valve is arranged in the middle of each oil path pipe, and the oil return pipeline is arranged at the bottom of each oil path pipe.

Preferably, the top of the transmission mechanism is provided with a pressure rod, return springs are arranged on two sides below the pressure rod, long rods are inserted into the return springs, inflation cylinders are arranged below the return springs on two symmetrical sides, an air bag is connected below the inflation cylinders, a transmission rod is arranged in the middle of the air bag, the pressure rod is connected above the transmission rod, the rod head is connected below the transmission rod, and a bayonet is arranged at a position below the rod head.

Preferably, the inner cavity of the upper surface of the piston sleeve is an oil cavity, an extension rod is arranged below the oil cavity, the lower end of the extension rod is connected with a plug head, and the plug head penetrates through two ends of the extension rod.

Preferably, damping spring is located the outside of cylinder, and around cylinder a week, and the below of end cover is being connected to the pillar of damping spring bottom, and the lower part of end cover is fixed in the top of base, and the base mid portion is equipped with the shrinkage pool, and the lateral wall of its shrinkage pool is fixed with the support.

The invention has the beneficial effects that:

(1) after the upper port and the lower port of the oil cylinder are connected to an object, after the concrete actual work, the outer ear ring is connected to the upper port of the object, the position of the inner ear ring is adjusted, the fixing ring is screwed, the fixing base is connected to the concave hole of the other object on the base, then when the object at the upper port begins to extrude the oil cylinder, the outer ear ring begins to be stressed and move downwards, the downward transmission rod is pushed to push through the downward transmission rod to swell the air bag, oil in the oil cavity is released, the oil is released from the pipe orifice, the oil pressure pushes the movable rod to begin to move upwards, the limiting ring clamps the outer ear ring, the oil cylinder can be kept to play a buffering role, then the oil cylinder at the outer part can be kept not to incline, the oil cylinder can play a role at any position, the practicability is improved, and the object can be protected to the greatest extent.

(2) The inner ear ring is pressed by an external object through a transmission mechanism, the inner ear ring is fixed on the rotating shaft through the fixing ring at the groove of the inner ear ring, when the external object is extruded downwards, the inner ear ring can be extruded downwards through the transmission rod, the return springs on the left side and the right side can be pressed in the process that the pressure rod is pressed downwards, the return springs can also touch the lower inflating cylinder to inflate the inflating cylinder, at the moment, the air bag can be opened and can be opened along a section of the lower air bag, the oil liquid cavity below the air bag is pressed to release the oil liquid, the limiting mechanism is promoted to start to move upwards, and the integrity of the object is ensured.

(3) According to the invention, external downward pressure can be transmitted through the pressure rod, the pressure can be transmitted to the piston sleeve, the plug head on the piston sleeve can be extruded downwards, oil can flow into the oil storage tank, flows through the oil discharge port, flows into the lower half part pipeline through the transportation of the upper part pipeline, then converges into the bottom of the oil cylinder through the oil delivery valve, flows into the top of the oil cylinder again through the oil return pipeline, and reflows again.

Drawings

The invention is further illustrated in the following figures and examples.

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

FIG. 2 is a schematic view of the end cap mechanism shown in FIG. 1;

FIG. 3 is a schematic view of the structure of the binaural shown in FIG. 2;

FIG. 4 is a sectional view taken along line A-A of FIG. 2;

FIG. 5 is an enlarged view of FIG. 4 at B;

FIG. 6 is an enlarged view at C of FIG. 4;

FIG. 7 is a schematic view of the closure block mechanism shown in FIG. 4;

FIG. 8 is an enlarged view at D of FIG. 4;

in the figure: 1. a double-earring; 11. an outer earring; 12; a rotating shaft; 13. an inner ear ring; 14. a fixing ring; 15. a guide ring; 16. a piston rod; 2. an end cap; 21. a cover wall; 22. a shaft seat; 23. a movable cylinder; 3. a cylinder barrel; 30. an oil seal block; 301. a connecting rod; 302. a bellows; 303. a pull rod; 304. sliding the teeth; 305. a pipe orifice; 31. a transmission mechanism; 311. a pressure lever; 312. a return spring; 313. an inflation cylinder; 314. an air bag; 315. a transmission rod; 316. a club head; 317. a bayonet; 32. a limiting mechanism; 321. a limiting ring; 322. an oil tank; 323. a travel bar; 324. an oil pipeline; 33. an oil discharge port; 34. an oil storage tank; 35. an oil storage tube; 36. a piston sleeve; 361. an oil chamber; 362. stretching the rod; 363. a plug head; 37. an oil delivery valve; 38. an oil return conduit; 4. a damping spring; 41. a pillar; 5. a base; 51. concave holes; 52. and (4) a bracket.

Detailed Description

In order to achieve the technical means, the creation features, the achievement purposes and the effects of the invention, which are easy to understand, the following description is further combined with the specific embodiments.

As shown in fig. 1-8, the hydraulic cylinder of the present invention comprises a double-earring 1, an end cover 2, a cylinder 3, a damping spring 4 and a base 5, and is characterized in that: the double-lug ring 1 is arranged at the top of the end cover 2, the cylinder barrel 3 is fixed in the middle of the end cover 2, the damping spring 4 winds the outside of the cylinder barrel 3, the lower end of the damping spring is fixed on the bottom of the end cover 2, and the lower end of the end cover 2 is fixedly welded above the base 5;

two side surfaces of the double-earring 1 are respectively provided with symmetrical outer earrings 11, the two symmetrical outer earrings 11 are connected through a rotating shaft 12, the middle part of the rotating shaft 12 penetrates through the other symmetrical inner earring 13, the inner earring 13 is fixedly connected to the rotating shaft 12, the middle part of the inner earring 13 is locked on the rotating shaft 12 through a fixing ring 14, similarly, the outer earring 11 is also locked on the rotating shaft 12 by using the same principle, the side surface of the outer earring 11 is connected with a guide ring 15, and a piston rod 16 is arranged below the guide ring 15; in operation, after the two guide rings 15 of the outer ear ring 11 are connected, the piston rod 16 on the upper side can be connected to a specific object hole, and the piston rod 16 on the other lower side is connected to the transmission mechanism 31, when an external object starts to move mechanically, at this time, due to the action of the fixing ring 14, the integral mechanism of the inner ear ring 13 can be ensured to be fixed on the rotating shaft 12, the left and right swing on the rotating shaft 12 along with the up and down reciprocating motion of the lower piston rod 16 can be ensured not to occur, meanwhile, the tightness of the fixing ring 14 can be adjusted, at the moment, the inner ear ring 13 mechanism can be adjusted left and right, so that the piston rod 16 on the upper side can be aligned to a proper position of the connecting hole, then the fixing ring 14 is screwed down, and the damping effect of the oil cylinder can be utilized to protect the object from being damaged in the transportation process.

A limiting ring 321 is arranged above the limiting mechanism 32, the lower end of the limiting ring 321 is connected with a moving rod 323, the bottom of the moving rod 323 is soaked in the oil tank 322 and is in an inverted triangle shape, and oil pipelines 324 are symmetrically arranged on two sides of the oil tank 322; in specific operation, when the transmission mechanism 31 starts to squeeze downwards, oil on both sides of the transmission rod 315 starts to flow outwards through the nozzle 305 under the squeezing of the air bag 314 and enters the oil tank 322, and as the transmission rod 315 of the transmission mechanism 31 continues to squeeze downwards, oil can continuously seep into the oil tank 322, under the full state of the inside of the oil tank 322, the movable rod 323 in the oil tank 322 starts to move upwards under the action of oil pressure, and because the bottom shape of the movable rod 323 immersed in the oil tank 322 is an inverted triangle, the contact area with the oil in the oil tank 322 is large, and a row of dense mesh-shaped structures are arranged above the inverted triangle at the bottom, a strong structure is formed at the bottom to meet the pressure caused by strong oil pressure, when the oil slowly enters the oil tank 322, the oil pressure inside starts to increase, the movable rod 323 moves upwards along with the rise of the internal oil pressure, the limiting ring 321 is fixed at the top of the movable rod 323, after the movable rod 323 moves, the limiting ring 321 starts to move upwards, the limiting ring 321 pushes against the groove at the bottom of the outer ear ring 11 after moving for a certain height, the outer ear ring 11 is firmer and more stable, and the oil tank 322 can pour more oil along with the higher downward extrusion force of the transmission rod 315, so that the higher pressure is generated inside the oil tank 322, the pressure can lift the movable rod 323 more powerfully upwards, and the limiting ring 321 can push against the outer ear ring 11 more tightly.

The oil seal block 30 top is equipped with connecting rod 301, connecting rod 301 right side is equipped with smooth tooth 304, be equipped with on the pull rod 303 of smooth tooth 304 right side and slide the tooth 304 meshing lock and pull rod 303 lower extreme welding has an extension rod, a row of bellows 302 is installed to connecting rod 301 below, bellows 302 right side lower extreme is connected with mouth of pipe 305. In specific operation, when the transmission rod 315 begins to be pressed downwards, the air bags 314 at both sides begin to be pressed downwards, the oil in the oil storage body at the lower part of the air bag 314 is pressed under pressure, the oil inside the oil storage body is released through the nozzle 305, because the oil is released from the inside of the oil storage body to the outside, a large amount of oil is gushed out from the nozzle 305 at the nozzle 305, and an externally applied force is added, so that the flow rate of the oil is increased, secondly, because the bellows 302 is arranged below the connecting rod 301, the left part of the bellows 302 is unblocked, the bellows 302 can move on the left, so when the oil in the inner cavity begins to gush outwards, at the moment, the transverse area of the cross rod below the pull rod 303 is pressed on the oil to cause a certain downward pressure, the pull rod 303 can move under the pressure of the oil, the pull rod 303 can start to move downwards on the left sliding tooth 304 until moving to the lowest point, then the bellows 302 on the left side starts to incline towards the left side under the impact of the oil in the inner cavity, and at the same time, the nozzle 305 at the lower end of the bellows 302 starts to incline towards the left side under the inclination of the bellows 302, so that the nozzle 305 at this time faces towards the bottom of the cavity, and when the transmission rod 315 is pressed to the bottom end, the transmission rod 315 starts to recover upwards under the dual action of the external damping spring 4 and the return spring 312 at the lower end of the pressure rod 311, at this time, the air pressure in the inner cavity will be reduced, however, the air pressure in the oil tank 322 will be the same as the external atmospheric pressure, which will form the difference of the internal and external air pressures, so that the oil will flow into the inner cavity from the oil tank 322, and the nozzle 305 will return to the original transverse state due to the interference of the bellows 302, the oil can smoothly enter the inner cavity, due to the existence of the pull rod 303, the bellows 302 can be prevented from being further pressed rightwards, the pull rod 303 can move upwards along with the reduction of the air pressure of the upper part of the inner cavity, but when the pull rod 303 rises to the highest position along with the sliding tooth 304, the bottom of the pull rod 303 is still lower than the highest position of the bellows 302, and the trend that the bellows 302 moves rightwards can be prevented.

Specifically, the end cover 2 is divided into an upper part and a lower part, and is connected to the upper end surface and the lower end surface, the upper end surface of the end cover is connected with the double-lug ring 1, the lower end surface of the end cover is connected with the upper part of the cylinder barrel 3, the lower end surface of the end cover is connected with the lower support 41 of the damping spring 4 and the lower part of the cylinder barrel 3, the lower end surface of the end cover is connected with the base 5, the outermost side of the end cover 2 is provided with a cover wall 21, a circle of the cover wall 21 is internally provided with a shaft seat 22, and the middle part of the shaft seat 22 is provided with a movable cylinder 23. When the oil cylinder is in specific work, when the upper part of the end cover 2 is connected to the double-lug ring 1, the lower part of the end cover is connected to the lower end of the cylinder barrel 3, the outer side of the upper part of the end cover 2 is surrounded by a cylinder wall, the inner shaft seat 22 is mainly protected, a circle of shaft seat 22 is arranged on the periphery of the cover wall 21, a movable cylinder 23 is sleeved inside the shaft seat 22, the movable cylinder 23 is mainly arranged to enable the downward pressure of the double-lug ring 1 to rise and fall through the height of the movable cylinder 23 and shake with the shaft seat 22, the internal downward pressure of the cylinder barrel 3 can be properly relieved, and the service life of the oil cylinder can be effectively prolonged.

Specifically, the inside top of first half of cylinder 3 crosscut plane is drive mechanism 31, stop gear 32 is being connected to drive mechanism 31 below, there is a piston sleeve 36 in drive mechanism 31 below middle position, piston sleeve 36 top is connected with oil storage pipe 35, batch oil tank 34 is installed to 3 both sides of cylinder, and the top mouth of pipe department that is located batch oil tank 34 is equipped with oil discharge port 33, the cylinder 3 the latter half is provided with oil circuit pipe at all levels, and the middle part is provided with oil delivery valve 37, and the bottom sets up oil return pipe 38. During specific work, when the transmission mechanism 31 starts to bear downward pressure, when the transmission rod 315 in the pressure mechanism 31 starts to move downward, the transmission rod 315 finally abuts against the bayonet 317, the oil storage pipe 35 is pressed to move downward along the bayonet 317, at this time, oil in the oil storage pipe 35 drives the piston sleeve 36 to move downward, so that the plug 363 at the front end of the plug sleeve downwards extrudes the oil in the oil storage tank 34, when the oil is accumulated to a certain height, the oil is conveyed out through the oil discharge port 33, the oil in the oil cylinder flows to the lower half part of the oil cylinder through the oil conveying pipeline 324, flows into the central inner cavity through the oil conveying valve 37, is temporarily stored, and then flows into the upper half part of the oil cylinder again through the oil return pipeline 38.

Specifically, a pressure rod 311 is arranged at the top of the transmission mechanism 31, return springs 312 are arranged on two sides below the pressure rod 311, a long rod is inserted into the return springs 312, inflation cylinders 313 are arranged below the symmetrical return springs 312 on two sides, an air bag 314 is connected below the inflation cylinders 313, a transmission rod 315 is arranged in the middle of the air bag 314, the pressure rod 311 is connected above the transmission rod 315, a rod head 316 is connected below the transmission rod 315, and a bayonet 317 is arranged below the rod head 316. When the top of the transmission mechanism 31 is pressed downwards, the pressure rod 311 can be pressed downwards, meanwhile, the return spring 312 can be pressed downwards and contracted, the central rod in the return spring 312 presses the lower inflation cylinder 313 downwards, so that the inflation cylinder 313 starts to inflate towards the interior of the air bag 314, because the shape of the air bag 314 is one section by one section, the air bag is required to inflate from the position close to the inflation cylinder 313, the adjacent air bag 314 starts to swell, then the next section of air bag 314 is swelled, so as to push inwards, when the air bag 314 swells, the inner cavity is also sunken downwards, oil in the cavity can be discharged, the oil can flow out towards the pipe orifices 305 on two sides, the transmission rod 315 in the middle of the transmission mechanism 31 is connected with the rod head 316 at the lowest end, when the rod head 316 moves downwards, the rod head 316 can touch the bayonet 317 and tightly fit together with the bayonet 317 and move downwards, the oil pressing the oil reservoir pipe 35 pushes the other mechanism in the cylinder to rotate, and when the rod end 316 presses the lowest end, the contraction starts, and the contraction starts under the combined action of the internal return spring 312 and the damper spring 4.

Specifically, an inner cavity of the upper surface of the piston sleeve 36 is an oil cavity 361, a rod 362 is installed below the oil cavity 361, a plug 363 is connected to the lower end of the rod 362, and the plug 363 penetrates through two ends of the rod 362. In specific operation, when the rod end 316 pushes the bayonet 317 to press the oil storage tube 35 downwards, the oil storage is located in the oil chamber 361 inside the oil storage tube 35, when the bayonet 317 is pushed slowly, the extension rod 362 inside the piston sleeve 36 begins to extend downwards to push the plug 363 to move downwards, and the top of the plug 363 is a latex cushion and has strong pressure resistance and sealing performance.

Specifically, damping spring 4 is located the outside of cylinder 3, and around cylinder 3 a week, and the below of end cover 2 is being connected to the pillar 41 of damping spring 4 bottom, the lower part of end cover 2 is fixed in the top of

base

5, 5 mid portion of base is equipped with shrinkage pool 51, and the lateral wall of its shrinkage pool 51 is fixed with support 52. During specific work, when the double-earring 1 begins to extrude downwards, the upper half part of the end cover 2 can be driven to start to move downwards vertically downwards at the moment, a part of the upper half part of the end cover 2 can be kept under the action of the damping spring 4, the lower half part of the strut 41 of the lower half part of the end cover 2 is circumferentially connected with the lowest part of the damping spring 4, the lower part of the end cover 2 is connected with the base 5, and the base 5 is connected with an object at the bottom through the concave hole 51.

The working principle of the hydraulic oil cylinder provided by the invention is as follows:

an external mounting process: at first link to each other outer earrings 11 and interior earrings 13, later link to each other interior earrings with object spare through the recess on the last piston rod 16 again, through removing interior earrings 13 to suitable position along pivot 12, later can screw up the solid fixed ring 14 of interior earrings 13 inslot, the purpose is when being convenient for object spare extrudees, interior earrings 13 can not be along pivot lateral shifting, the base in the inslot also can pass on the shrinkage pool 51 of base is fixed in the object of lower part through the connecting piece, guarantee that whole hydro-cylinder body can normally work.

After the oil cylinder starts to work: when the external upper object starts to be acted by external force, the external force is transmitted from the inner earring 13 to the outer earring 11 and then turns into the pressure rod 311, so that the power can be transmitted downwards by the upper pressure rod 311, the pressure rod 311 starts to press the return spring 312 downwards, so that the vertical rod in the middle of the return spring 312 presses the inflating cylinder 313 downwards, at this time, the inflating cylinder 313 will downwards swell the air bag 314, push the air bag 314 to swell one section by one section, and then press the oil cavity downwards, so that the oil in the oil cavity is flushed out from the pipe orifice 305 and enters the oil tank 322, when the oil is stored at the bottom of the moving rod 323, the oil pushes the moving rod 323 to start moving upwards, the limiting ring 321 is pushed into the clamping groove of the external ear ring 11, so that the outer earring 11 will be more secure and will also ensure that the upper part of the article will be supported more effectively by the lower base. Secondly, as the driving rod 315 at the lower end of the pressure rod 311 continues to be pressed downward, the rod head 316 at the front end thereof moves to the bayonet 317 and pushes the oil storage tube 35 downward, the oil inside pushes the piston sleeve 36 to move downward, the oil in the oil storage tank 34 is pressed by the plug 363 and moves toward the oil discharge port 33, the internal oil will flow to the internal pipe in the cylinder, will start to swim in the oil pipe of the upper half of the cylinder, and then will enter the lower half of the cylinder, and flows along the pipeline of the lower half part of the oil cylinder and then converges to the top of the lower half part of the oil cylinder, by opening the oil delivery pipe 37, the oil is discharged into the bottom, and then flows into the top of the cylinder through the oil return pipe 38, and the cycle is repeated, in the process of pipeline oil transportation, the oil pipe is tightly attached to the inner wall of the oil cylinder, so that the inner wall of the oil cylinder can be lubricated.

After the cylinder is contracted, when the pressure rod 311 begins to extrude, the pressure rod extrudes to the bottom once, the external force extruded to the cylinder is absorbed by the damping spring 4 which is arranged around the cylinder barrel 3 and the oil in the cylinder barrel, pressure is released, after the extrusion is completed once, the internal transmission rod 315 rebounds under the internal oil pressure, contraction work is carried out, the transmission rod 315 starts to move upwards under the reverse pushing of the oil pressure, at the moment, the external structure and the internal structure are required to release pressure, at the moment, the plug head moves upwards, the air pressure in the oil storage tank 34 is reduced, the oil in the lower half part of the internal cylinder flows back to enter the oil storage tank 34 again, the air bag 314 stops working along with the stop of the inflation cylinder 313, the oil cavity swells again along with the loss of the extrusion effect of the air bag 314, and at the moment, the oil in the oil tank 322 enters the oil cavity again, when the oil pressure in the oil tank 322 is lost, the movable rod 323 descends, the limiting ring 321 falls off from the slot, but the return spring 312 releases the pressure of the contracted transmission rod 315, the damping spring 4 outside the cylinder 3 also releases the pressure, and the cylinder wall is kept stable.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a hydraulic cylinder, includes earrings (1), end cover (2), cylinder (3), damping spring (4) and base (5), its characterized in that: the double-lug ring (1) is arranged at the top of the end cover (2), the cylinder barrel (3) is fixed in the middle of the end cover (2), the damping spring (4) winds the outside of the cylinder barrel (3), the lower end of the damping spring is fixed on the bottom of the end cover (2), and the lower end of the end cover (2) is fixedly welded above the base (5);

two symmetrical outer earrings (11) are respectively arranged on two side faces of the double-earring (1), the two symmetrical outer earrings (11) are connected through a rotating shaft (12), the middle of the rotating shaft (12) penetrates through the other symmetrical inner earring (13), the inner earring (13) is fixedly connected to the rotating shaft (12), the middle of the inner earring (13) is locked on the rotating shaft (12) through a fixing ring (14), similarly, the outer earring (11) is also locked on the rotating shaft (12) by using the same principle, the side faces of the outer earring (11) are connected with a guide ring (15), and a piston rod (16) is arranged below the guide ring (15);

a limiting ring (321) is arranged above the limiting mechanism (32), the lower end of the limiting ring (321) is connected with a moving rod (323), the bottom of the moving rod (323) is soaked in the oil tank (322) and is in an inverted triangle shape, and oil pipelines (324) are symmetrically arranged on two sides of the oil tank (322);

oil seal piece (30) top is equipped with connecting rod (301), connecting rod (301) right side is equipped with smooth tooth (304), be equipped with on smooth tooth (304) right side pull rod (303) with lock tooth and pull rod (303) lower extreme welding of smooth tooth (304) meshing have an extension rod, one row of bellows (302) are installed to connecting rod (301) below, bellows (302) right side lower extreme is connected with mouth of pipe (305).

2. A hydraulic cylinder as claimed in claim 1, characterized by: the end cover (2) is divided into an upper part and a lower part, the upper part and the lower part are connected with the upper end face and the lower end face, the upper end face of the upper end face is connected with the double-lug ring (1), the lower part of the cylinder barrel (3) is connected with the upper part of the cylinder barrel, the lower end face of the upper end face is connected with the lower pillar (41) of the damping spring (4) and the lower part of the cylinder barrel (3), the lower part of the lower end face is connected with the base (5), the outermost side of the end cover (2) is provided with a cover wall (21), a circle of the cover wall (21) is internally provided with a shaft seat (22), and the middle part of the shaft seat (22) is provided with a movable cylinder (23).

3. A hydraulic cylinder as claimed in claim 1, characterized by: the cylinder (3) transecting the inside top of the first half in plane is drive mechanism (31), stop gear (32) is being connected to drive mechanism (31) below, drive mechanism (31) below middle part is placed one piston sleeve (36), piston sleeve (36) top is connected with oil storage pipe (35), batch oil tank (34) are installed to cylinder (3) both sides, and the top mouth of pipe that is located batch oil tank (34) is located and is equipped with oil discharge opening (33), cylinder (3) the latter half is provided with oil circuit pipe at all levels, and the middle part is provided with defeated oil valve (37), and the bottom sets up oil return pipe (38).

4. A hydraulic cylinder as claimed in claim 3, characterized by: the pneumatic transmission mechanism is characterized in that a pressure rod (311) is arranged at the topmost part of the transmission mechanism (31), return springs (312) are installed on two sides below the pressure rod (311), long rods are inserted into the return springs (312), inflation cylinders (313) are arranged below the symmetrical return springs (312) on two sides, an air bag (314) is connected below the inflation cylinders (313), a transmission rod (315) is installed in the middle of the air bag (314), the pressure rod (311) is connected above the transmission rod (315), a rod head (316) is connected below the transmission rod (315), and a bayonet (317) is arranged at a position below the rod head (316).

5. A hydraulic cylinder as claimed in claim 3, characterized by: an oil cavity (361) is formed in an inner cavity of the upper surface of the piston sleeve (36), an extension rod (362) is installed below the oil cavity (361), a plug head (363) is connected to the lower end of the extension rod (362), and the plug head (363) penetrates through two ends of the extension rod (362).

6. A hydraulic cylinder as claimed in claim 1, characterized by: damping spring (4) are located the outside of cylinder (3), and around cylinder (3) a week, and the below of end cover (2) is being connected in pillar (41) of damping spring (4) bottom, the lower part of end cover (2) is fixed in the top of base (5), base (5) mid portion is equipped with shrinkage pool (51), and the lateral wall of its shrinkage pool (51) is fixed with support (52).