CN210423218U

CN210423218U - Hydraulic oil cylinder

Info

Publication number: CN210423218U
Application number: CN201920983530.0U
Authority: CN
Inventors: 张宏生
Original assignee: Jiangsu Tieyoude Hydraulic Technology Co ltd
Current assignee: Jiangsu Tieyoude Hydraulic Technology Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-28
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a hydraulic cylinder, which comprises an upper cylinder cover arranged at the upper end, a lower blocking cover arranged at the lower end and a hollow cylinder barrel arranged inside, wherein the cylinder barrel is internally provided with a piston rod with the upper end extending out of the upper cylinder cover and capable of moving up and down and a piston fixedly arranged at the bottom end of the piston rod and moving along with the piston rod in the cylinder barrel in a sealing way, the upper end and the lower end of one side of the cylinder barrel are respectively provided with an oil outlet nozzle and an oil inlet nozzle communicated with an inner cavity, a sealing element, a guiding device and an upper cylinder cover are sequentially arranged in the cylinder barrel above the oil inlet nozzle from bottom to top, and a detachable dust removing device is arranged at the top end of the upper cylinder cover, the guiding device arranged by the utility model can effectively slow down the unilateral abrasion of the piston rod, and the dust removing device can clear away the dust, the problem that the cylinder barrel is deformed and fails due to high pressure of the hydraulic oil cylinder can be effectively solved.

Description

Hydraulic oil cylinder

Technical Field

The utility model relates to a hydraulic cylinder, especially a hydraulic cylinder for rerailer belongs to railway equipment technical field.

Background

The hydraulic oil cylinder is a kind of executing device in a hydraulic transmission system and can convert hydraulic energy into mechanical energy. The re-railing device is usually provided with a hydraulic oil cylinder which can realize reciprocating linear motion, so that the vehicle which falls off the rail can be lifted and transversely moved to the rail and then descended to the rail, and the re-railing process of the vehicle which falls off the rail is completed. However, the adhesion of dust and dirt on the piston rod during the operation of the hydraulic cylinder can cause the reciprocating movement of the piston rod in the cylinder barrel to be unsmooth, and even more, the piston rod can be completely blocked. Simultaneously the hydraulic cylinder that plays elevating system and sideslip effect in rerailer can appear unilateral wearing and tearing after long-term work to hydraulic cylinder's superhigh pressure environment easily leads to the cylinder to warp inefficacy, can take the thickness of increase cylinder to prevent that the cylinder warp among the prior art usually, and this weight that leads to hydraulic cylinder can be very big, and it is inconvenient to remove.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a hydraulic cylinder, which can effectively remove dust and dirt on the piston rod and prevent the piston rod from being blocked in reciprocating motion; the arranged guide device can effectively slow down the unilateral abrasion of the piston rod; meanwhile, the weight of the hydraulic oil cylinder can be reduced, and the overall compressive strength is improved.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

a hydraulic cylinder comprises a cylinder barrel, wherein the upper end of the cylinder barrel is provided with an upper cylinder cover, the lower end of the cylinder barrel is provided with a lower blocking cover and is hollow inside, the inside of the cylinder barrel is provided with a piston rod, the upper end of the piston rod extends out of the upper cylinder cover and can move up and down, and a piston which is fixedly arranged at the bottom end of the piston rod and can move in a sealing manner along with the piston rod inside the cylinder barrel;

the guide device comprises a guide sleeve provided with a central hole through which a piston rod can pass, the upper end and the lower end of the guide sleeve are provided with convex edges which are rotatably arranged on the inner wall of the cylinder barrel, a plurality of longitudinal ball grooves are uniformly distributed on the inner wall of the guide sleeve, and a plurality of balls are longitudinally arranged in each ball groove;

the dust removal device comprises a dust removal cover which is sleeved on the piston rod and is provided with an inner cavity, a rubber layer is arranged above a sponge layer arranged at the bottom of the inner cavity of the dust removal cover, and a plurality of compression springs which tightly attach the top end of the rubber layer to the piston rod are evenly arranged at the position, corresponding to the top end of the rubber layer, of the upper end of the inner cavity.

The utility model discloses technical scheme's further improvement lies in: the number of the ball grooves is six or eight, and the number of the balls in each ball groove is more than four.

The utility model discloses technical scheme's further improvement lies in: the dust hood is made of engineering plastics.

The utility model discloses technical scheme's further improvement lies in: the compression springs are arranged in four or six.

The utility model discloses technical scheme's further improvement lies in: the dust hood is evenly provided with two halves along the bus position and is sleeved on the piston rod in an opening and closing manner.

The utility model discloses technical scheme's further improvement lies in: the cylinder barrel comprises an inner cylinder barrel and an outer cylinder barrel, and the outer cylinder barrel is made of carbon fiber composite materials.

The utility model discloses technical scheme's further improvement lies in: the oil inlet nozzle is connected with an oil inlet pipeline, and a hydraulic lock and an emergency unloading valve are arranged on the oil inlet pipeline.

Due to the adoption of the technical scheme, the utility model discloses the technological progress who gains is:

the utility model discloses the guider that sets up can play the guide effect, becomes the sliding friction when reciprocating the piston rod simultaneously and rubs with the rolling of ball, adds in the uide bushing simultaneously and establishes lubricating oil, can effectively slow down the unilateral wearing and tearing of piston rod, and the uide bushing rotates through protruding edge and sets up inside the cylinder, regularly rotates the uide bushing and can prevent only wearing and tearing the ball of one side, guarantees smooth when reciprocating the piston rod; the dust removal device is arranged at the top end of the upper cylinder cover, a rubber layer in the dust removal device is tightly attached to the piston rod through a compression spring and can remove dust on the piston rod, a sponge layer arranged on the lower layer can remove water stains and oil stains on the piston rod and prevent the oil stains and dust on the piston rod from influencing the reciprocating motion of the piston rod, and meanwhile, the dust removal cover can be further provided with two parts which can be opened and closed, so that the dirty rubber layer and the sponge layer can be replaced conveniently in time, and the cleaning effect is prevented from being influenced after the rubber layer and the sponge layer are dirty; the cylinder barrel comprises an inner cylinder barrel and an outer cylinder barrel, the outer cylinder barrel is made of carbon fiber composite materials, the compression strength of equipment is obviously improved under the condition that the thickness of the cylinder barrel is not increased, the weight of the hydraulic oil cylinder can be obviously reduced, and the problem that the cylinder barrel is deformed and fails due to ultrahigh pressure is solved; the hydraulic lock arranged on the oil inlet pipeline can lock the oil cylinder to descend in time when the hydraulic lock is impacted by external load, loses power or the oil pipe bursts suddenly, so that the safety of equipment and personnel is guaranteed, and meanwhile, the emergency unloading valve can be stopped to work to slowly unload pressure when the field power equipment fails, so that the safety of operation is improved.

Drawings

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

FIG. 2 is a partially cut-away schematic view of the present invention;

FIG. 3 is a schematic sectional view of the guide sleeve of the present invention;

the device comprises a dust removal device 1, a dust removal cover 101, a dust removal cover 102, a compression spring 103, a rubber layer 104, a sponge layer 2, an upper cylinder cover 3, a guide device 301, a guide sleeve 302, a ball 4, a sealing element 5, a piston rod 6, a piston 7, a lower plug cover 8, an inner cylinder barrel 9, an outer cylinder barrel 10, an oil inlet nozzle 11 and an oil outlet nozzle.

Detailed Description

The present invention will be described in further detail with reference to the following examples:

example 1:

as shown in fig. 1-3, a hydraulic cylinder comprises a cylinder barrel, wherein an upper cylinder cover 2 is arranged at the upper end of the cylinder barrel, a lower plug cover 7 is arranged at the lower end of the cylinder barrel, an inner cavity is formed in the inner cavity of the cylinder barrel, the cylinder barrel comprises an inner cylinder barrel 8, an outer cylinder barrel 9 and the outer cylinder barrel 9 which are made of carbon fiber composite materials, the compressive strength of equipment is obviously improved under the condition that the thickness of the cylinder barrel is not increased, the weight of the hydraulic cylinder can be obviously reduced, and the problem that the cylinder barrel is deformed and. The cylinder barrel is internally provided with a piston rod 5, the upper end of which extends out of the upper cylinder cover 2 and can move up and down, and the center of the upper cylinder cover 2 is provided with a center hole through which the piston rod 5 can pass. The bottom end of the piston rod 5 is fixedly provided with a piston 6, and the piston 6 can move along with the piston rod 5 in a sealing mode inside the cylinder barrel. The upper end and the lower end of one side of the cylinder barrel are respectively provided with an oil outlet nozzle 11 and an oil inlet nozzle 10 which are communicated with the inner cavity, the oil outlet nozzle 11 and the oil inlet nozzle 10 are respectively connected with an oil outlet pipeline and an oil inlet pipeline, a hydraulic lock and an emergency unloading valve are arranged on the oil inlet pipeline, the hydraulic lock arranged on the oil inlet pipeline can lock the oil cylinder to descend in time when the oil cylinder is impacted by external load, loses power or the oil pipe bursts suddenly, the safety of equipment and personnel is guaranteed, meanwhile, the emergency unloading valve can stop working to slowly unload the pressure when the field power equipment fails, and the safety of the operation is improved.

The sealing element 4, the guiding device 3 and the upper cylinder cover 2 are sequentially arranged in the cylinder barrel above the oil inlet nozzle 10 from bottom to top, and the dust removal device 1 is detachably arranged at the top end of the upper cylinder cover 2. The guiding device 3 comprises a guiding sleeve 301, a center hole through which the piston rod 5 can pass is formed in the center of the guiding sleeve 301, and protruding edges rotatably arranged on the inner wall of the cylinder barrel are arranged at the upper end and the lower end of the center hole, a plurality of longitudinal ball grooves are uniformly distributed on the inner wall of the guiding sleeve 301, and a plurality of balls are longitudinally arranged in each ball groove. The number of the ball grooves is six or eight, and the number of the balls in each ball groove is more than four. Guider 3 can play the guide effect, sliding friction when simultaneously with 5 reciprocating motion of piston rod becomes with the rolling friction of ball, adds in uide bushing 301 simultaneously and establishes lubricating oil, reduces frictional resistance, can effectively slow down 5 unilateral wearing and tearing of piston rod, uide bushing 301 rotates through protruding edge and sets up inside the cylinder, regularly rotates uide bushing 301 and can prevent the ball of only wearing and tearing one side, smoothness when guaranteeing 5 reciprocating motion of piston rod.

Dust collector locates the dust excluding hood 101 on piston rod 5 and be provided with the inner chamber including the cover, dust excluding hood 101 adopts the engineering plastics material, the inner chamber of dust excluding hood 101 is for encircleing the toroidal cavity on piston rod 5, the inner chamber bottom of dust excluding hood 101 sets up sponge layer 104, sponge layer 104 can be clear away the water stain and the greasy dirt on the piston rod 5 totally, the top of sponge layer 104 is provided with rubber layer 103, the position that the inner chamber upper end corresponds rubber layer 103 top evenly sets up a plurality of compression spring 102 of hugging closely piston rod 5 with rubber layer 103 top, compression spring 102 sets up to four or six. The rubber layer 103 is tightly attached to the piston rod 5 through the compression spring 102, so that dust on the piston rod 5 can be removed, and oil stain and dust on the piston rod 5 can be completely removed through the combination of the sponge layer 104 and the rubber layer 103, so that the reciprocating motion of the piston rod 5 is prevented from being influenced by the oil stain and the dust.

Example 2:

the difference of this embodiment and embodiment 1 lies in that dust excluding hood 101 evenly sets up to the cover that two halves and can open and shut along the generating line position and locates the piston rod 5 on, and dust excluding hood 101 passes through the articulated opening and shutting that realizes two halves of hinge, passes through the bolt-up after the closure simultaneously, is convenient for in time change dirty rubber layer 103 and sponge layer 104, prevents to influence clean effect after rubber layer 103 and sponge layer 104 are dirty.

Claims

1. The utility model provides a hydraulic cylinder, sets up cylinder cap (2) including the upper end, the lower extreme sets up blanking cover (7) and inside hollow cylinder down, and cylinder inside is provided with the upper end and stretches out cylinder cap (2) and piston rod (5) that can reciprocate and fixed set up in piston rod (5) bottom and at inside piston (6) of following piston rod (5) sealed removal of cylinder, and the upper and lower end of cylinder one side is provided with respectively and goes out glib (11) and oil feed mouth (10) with the inner chamber intercommunication of cylinder, its characterized in that: a sealing piece (4), a guide device (3) and an upper cylinder cover (2) are sequentially arranged in the cylinder barrel above the oil inlet nozzle (10) from bottom to top, and a detachable dust removal device (1) is installed at the top end of the upper cylinder cover (2);

the guide device (3) comprises a guide sleeve (301) provided with a central hole through which the piston rod (5) can pass, the upper end and the lower end of the guide sleeve (301) are provided with convex edges which are rotatably arranged on the inner wall of the cylinder barrel, a plurality of longitudinal ball grooves are uniformly distributed on the inner wall of the guide sleeve (301), and a plurality of balls are longitudinally arranged in each ball groove;

the dust removal device comprises a dust removal cover (101) which is sleeved on the piston rod (5) and is provided with an inner cavity, a sponge layer (104) is arranged at the bottom of the inner cavity of the dust removal cover (101), a rubber layer (103) is arranged above the sponge layer (104), and a plurality of compression springs (102) which tightly attach the top end of the rubber layer (103) to the piston rod (5) are uniformly arranged at positions, corresponding to the top end of the rubber layer (103), of the upper end of the inner cavity.

2. A hydraulic cylinder as claimed in claim 1, characterized by: the number of the ball grooves is six or eight, and the number of the balls in each ball groove is more than four.

3. A hydraulic cylinder as claimed in claim 1, characterized by: the dust hood (101) is made of engineering plastics.

4. A hydraulic cylinder as claimed in claim 3, characterized by: the compression springs (102) are arranged in four or six.

5. A hydraulic cylinder according to claim 4, characterized in that: the dust hood (101) is evenly arranged into two halves along the bus position and is sleeved on the piston rod (5) in an opening and closing manner.

6. A hydraulic cylinder as claimed in claim 1, characterized by: the cylinder barrel comprises an inner cylinder barrel (8) and an outer cylinder barrel (9), and the outer cylinder barrel (9) is made of carbon fiber composite materials.

7. A hydraulic cylinder as claimed in claim 1, characterized by: the oil inlet nozzle (10) is connected with an oil inlet pipeline, and a hydraulic lock and an emergency unloading valve are arranged on the oil inlet pipeline.