CN214661229U - Synchronous oil cylinder using one-way valve for oil supplement - Google Patents

Abstract

The utility model relates to an use synchronous hydro-cylinder of check valve benefit oil, it includes the benefit oil device, the benefit oil device includes the casing, a plurality of oil pockets have been seted up along length direction in the casing, wear to be equipped with a synchronizing bar simultaneously in a plurality of oil pockets, every oil pocket still is provided with a piston, the piston slides along the axial and the oil pocket inner wall of synchronizing bar and seals, piston and synchronizing bar rigid coupling, be provided with adjusting part in the piston, adjusting part is including setting up the check valve at the piston both ends respectively, the direction of opening of check valve is from the piston outside to the piston inboard, oil inlet and oil-out have still been seted up in the oil pocket, oil inlet and oil-out are located the both sides of piston respectively, still be provided with the hydro-cylinder body on the oil-out of benefit oil device. This application has the effect of carrying out automatic mend oil to the hydro-cylinder that lacks oil.

Description

Synchronous oil cylinder using one-way valve for oil supplement

Technical Field

The application relates to the field of hydraulic machinery, in particular to a synchronous oil cylinder using a one-way valve for oil supplement.

Background

The oil cylinder is an actuating element which converts hydraulic energy into kinetic energy and drives a piston rod to do reciprocating linear motion. The device is widely applied to places such as mines, docks, warehouses and the like which need frequent loading and unloading operations, and can also be applied to equipment such as large-scale machine tools and the like. In the driving process of large-scale equipment, a plurality of groups of oil cylinders are often used for supporting at different positions of the equipment, and the plurality of groups of oil cylinders are controlled to work synchronously at the same speed, so that the stability of workpieces is improved.

The oil cylinder in the related field mainly comprises a cylinder barrel and a piston connected in the cylinder barrel in a sliding mode, wherein the piston divides the cylinder barrel into two independent chambers. The piston is fixedly connected with a piston rod, and the opening of the cylinder barrel is covered with a cylinder cover. An extension oil hole and a contraction oil hole are respectively formed in the cylinder barrel and are respectively communicated with the two cavities on two sides of the piston. When the oil cylinder works, hydraulic oil is pumped into the extended oil hole, so that a piston rod of the propping oil cylinder extends out of the cylinder barrel. When the oil cylinder needs to retract, hydraulic oil is pumped into the retracting oil hole, so that the piston rod retracts.

When the hydro-cylinder overhauls the operation such as, cause the inside lack of oil of hydro-cylinder easily, and then lead to the inside entering air of hydro-cylinder, because air and hydraulic oil compression ratio have obvious difference, when the hydro-cylinder of lack of oil and normal hydro-cylinder linkage, during simultaneous working, the sensitivity and the drive power of lack of oil hydro-cylinder are different with normal hydro-cylinder to lead to two hydro-cylinders operation desynchrony.

SUMMERY OF THE UTILITY MODEL

In order to carry out automatic oil supplementation to the hydro-cylinder that lacks oil, this application provides a synchronous hydro-cylinder that uses check valve to mend oil.

The application provides an use synchronous hydro-cylinder of check valve benefit oil adopts following technical scheme:

a synchronous oil cylinder using a one-way valve for oil supplement comprises an oil supplement device, wherein the oil supplement device comprises a shell, a plurality of oil cavities are formed in the shell along the length direction, a synchronizing rod penetrates through the oil cavities at the same time, a piston is further arranged in each oil cavity, the piston slides and seals with the inner wall of each oil cavity along the axial direction of the synchronizing rod, the piston is fixedly connected with the synchronizing rod, an adjusting assembly is arranged in the piston, the adjusting assembly comprises one-way valves respectively arranged at two ends of the piston, the opening direction of the one-way valves is from the outer side of the piston to the inner side of the piston, and the one-way valves are controlled to be opened and closed by the pressure in the oil cavities; an oil inlet and an oil outlet are further formed in the oil cavity, the oil inlet and the oil outlet are respectively located on two sides of the piston, and an oil cylinder body is further arranged on the oil outlet of the oil supplementing device.

By adopting the technical scheme, when the oil supplementing device works, hydraulic oil enters the oil cavity from the oil inlet, and the oil pressure of the piston on one side of the oil inlet rises, so that the hydraulic oil pushes the piston to slide towards the direction of the oil outlet and squeezes the hydraulic oil on one side, facing the oil outlet, of the piston in the oil cavity into the oil cylinder body to drive the oil cylinder body to work. Because the volumes in the oil cavities are equal, the effective areas are equal, and the pistons are fixedly connected with the synchronizing rod at the same time, so that the pistons can synchronously slide at the same speed along the axial direction of the synchronizing rod, hydraulic oil with the same volume is extruded into the oil cylinder body in unit time, and the working stability of the synchronizing oil cylinder is improved. Due to the arrangement of the one-way valve, when oil is lacked in one of the oil cylinder bodies, the oil pressure at the oil cylinder body is reduced after the oil is lacked, so that when the oil cylinder body reaches the maximum stroke or the minimum stroke, the pressure difference between two ends drives the one-way valve to be opened, and the oil supplementing operation is completed.

Optionally, two containing holes used for containing the check valve are respectively formed in two ends of the piston, the two containing holes are coaxially arranged and communicated with each other, the check valve comprises a sealing conical block arranged in the containing hole, a compression spring used for supporting the two sealing conical blocks to be away from each other is arranged between the two sealing conical blocks, the small end of the sealing conical block deviates from the compression spring, and a sealing ring which is mutually abutted and sealed with the conical surface of the sealing conical block is coaxially and fixedly connected to the inner peripheral surface of the containing hole.

Through adopting above-mentioned technical scheme, the setting of check valve, two sealed taper blocks keep away from each other under compression spring's elasticity effect, and the sealing ring is sealed with the mutual butt of the conical surface of sealed taper block to the check valve is closed, has restricted hydraulic oil from the inside to the outside outflow of piston, thereby has played the one-way current effect of restriction hydraulic oil.

Optionally, a snap ring is fixedly connected to the inner wall of the accommodating hole, and a clamping groove fixed to the snap ring in a clamping manner is formed in the corresponding sealing ring.

Through adopting above-mentioned technical scheme, the mutual screens of snap ring and draw-in groove to fix the sealing ring on the inner wall of accommodation hole, made things convenient for the staff to ann tears open the check valve.

Optionally, a small end of the sealing cone block is coaxially and fixedly connected with a feeler lever used for abutting against the inner wall of the oil cavity so as to open the one-way valve.

Through adopting above-mentioned technical scheme, when the piston slided to the one end of oil pocket, the feeler lever contradicts each other with the inner wall of oil pocket to the feeler lever promotes sealed cone block and slides, and opens the check valve, has made things convenient for the operation of mending oil or draining the oil pocket.

Optionally, an annular groove is respectively formed in the side walls of the two ends of the oil cavity in the length direction of the shell, the axis of the feeler lever is parallel to the axis of the annular groove, and the projection of the axis of the feeler lever on the plane where the annular groove is located falls on the circle of the inner circle of the annular groove.

By adopting the technical scheme, when the piston slides to one end of the oil cavity, one part of the feeler lever abuts against the edge of the inner ring of the annular groove, so that hydraulic oil in the annular groove can more conveniently pass through the one-way valve, when the oil cavity high-pressure side is used for oil supplement, the hydraulic oil in the annular groove can more uniformly enter the piston, and the uniformity of the stress of the piston during oil supplement is improved.

Optionally, the casing includes a plurality of coaxial connecting cylinders that set up, sets up the connecting block between two adjacent connecting cylinders, sets up two sealed pieces at a plurality of connecting cylinder head and the tail both ends respectively, and two adjacent connecting cylinders pass through flange joint, and two adjacent connecting cylinders are fixed with the connecting block centre gripping.

By adopting the technical scheme, the split arrangement of the shell simplifies the processing difficulty, improves the processing precision to a certain extent, and also facilitates the disassembly of the parts inside the shell by the workers.

Optionally, the piston includes two semicylinders of splicing each other, and the one side that two semicylinders are in opposite directions respectively sets up one and is used for holding the groove of stepping down of synchronizing bar, and the inslot of stepping down still the rigid coupling has a constant head tank, sets up the constant head tank of holding ring cooperation screens on corresponding the global of synchronizing bar.

Through adopting above-mentioned technical scheme, two semicylinders embrace and close on the synchronizing bar and in the holding ring card goes into the constant head tank, through the mutual screens of constant head tank and holding ring to with piston and synchronizing bar to reciprocal anchorage, and then make a plurality of pistons can be along with the synchronous with fast motion of synchronizing bar, and then improved the stability of piston work. After the piston is divided into the two semicircular rings, the piston can be conveniently fixed on the synchronizing rod by workers, and the one-way valve can be conveniently fixed by the workers.

Optionally, a containing groove is formed in the side face of the piston, a hoop is arranged in the containing groove, and two ends of the hoop are fixedly connected with the two semi-cylinders respectively.

Through adopting above-mentioned technical scheme, the setting of storage tank has accomodate the staple bolt to make the staple bolt can be more stable with two semicylinders reciprocal anchions, improved staple bolt job stabilization nature, reduced the staple bolt that leads to owing to the piston slides and the condition of oil pocket inner wall wearing and tearing.

Optionally, a sealing sleeve is further arranged on the outer side of the hoop, and the outer peripheral surface of the sealing sleeve is abutted and sealed with the inner wall of the connecting cylinder.

Through adopting above-mentioned technical scheme, seal bushing sets up in the outside of staple bolt to further protect the staple bolt, improved staple bolt job stabilization nature, on the other hand seal bushing and the mutual butt of oil pocket inner wall, thereby improved the leakproofness between piston and the oil pocket inner wall.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the plurality of pistons are simultaneously and fixedly connected to the same synchronizing rod, so that the plurality of pistons can synchronously slide along with the synchronizing rod, and the plurality of oil cylinder bodies are supplied with oil in equal quantity, and the working stability of the plurality of synchronizing oil cylinders is improved;

2. the setting of check valve for the oil supplementing device can carry out oil supplementing or draining operation to the hydro-cylinder body that lacks oil or many oils, thereby improves the synchronism of a plurality of hydro-cylinder body work.

Drawings

FIG. 1 is a schematic view of the overall structure of an oil supply device in an embodiment of the present application;

FIG. 2 is a sectional view of the internal structure of the oil compensating device;

FIG. 3 is a schematic view showing the installation relationship of the piston and the synchronizing bar;

FIG. 4 is an enlarged view of detail A of FIG. 2 and showing the check valve;

fig. 5 is a schematic view showing the installation relationship of the piston and the synchronizing rod after the sealing sleeve is removed.

Description of reference numerals: 1. a housing; 11. an oil inlet; 111. a tee joint; 12. an oil outlet; 13. a connecting cylinder; 14. connecting blocks; 141. connecting sheets; 15. a sealing block; 151. a stepped groove; 152. a through hole; 153. a seal ring; 154. an axle tube; 155. a blind plate; 156. sealing the column; 16. a flange sheet; 161. sealing the screw rod; 162. a seal nut; 17. a connecting bolt; 18. a connecting nut; 2. an oil chamber; 21. a synchronization lever; 211. fixing grooves; 212. positioning a groove; 22. a ring groove; 3. a piston; 31. an accommodation hole; 32. a yielding groove; 33. a positioning ring; 4. a one-way valve; 41. sealing the conical block; 42. a snap ring; 43. a seal ring; 431. a card slot; 44. mounting a rod; 45. a compression spring; 46. a feeler lever; 5. a containing groove; 51. hooping; 52. sealing the sleeve; 53. a rubber sleeve.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a synchronous oil cylinder for supplementing oil by using a one-way valve. The synchronous oil cylinder comprises at least two oil cylinder bodies and an oil supplementing device for supplying oil to the oil cylinder bodies simultaneously. This application explains with the benefit oily device of two hydro-cylinder bodies of drive.

As shown in fig. 1 and 2, the oil supplementing device includes a housing 1, two oil inlets 11 are disposed on one side of the housing 1, an oil separating assembly is disposed at each of the two oil inlets 11, the oil separating assembly includes a tee 111, two ends of the tee 111 are respectively communicated with the two oil inlets 11, and the other end of the tee 111 is communicated with an oil pump. One side of the shell 1, which is far away from the oil inlet 11, is provided with two oil outlets 12, and the two oil outlets 12 are respectively connected with the two oil cylinder bodies. The connection between the cylinder body and the oil outlet 12 is known in the art and will not be described herein. Two oil supplementing devices are arranged, wherein two oil outlets 12 of one oil supplementing device are respectively communicated with rodless cavities of the two oil cylinder bodies; two oil outlets 12 of the other oil supplementing device are respectively communicated with rod cavities of the two oil cylinder bodies.

As shown in fig. 1 and 2, the housing 1 includes two connecting cylinders 13 coaxially disposed, a connecting block 14 is disposed between the two connecting cylinders 13, and two sealing blocks 15 are disposed at two ends of the two connecting cylinders 13 facing away from each other. The two ends of the connecting cylinder 13 in the length direction are respectively provided with a flange piece 16, the sealing block 15 is covered on the end part of the connecting cylinder 13, a sealing screw 161 is fixedly connected to the flange piece 16 of the connecting cylinder 13 close to the sealing block 15, the sealing screw 161 penetrates through the sealing block 15 and is in threaded fit with a sealing nut 162, and the sealing block 15 is pressed on the end part of the connecting cylinder 13 through the threaded fit between the sealing nut 162 and the sealing screw 161. Sealed piece 15 still has seted up a ladder groove 151 towards the one side of connecting cylinder 13, and the terminal surface embedding ladder groove 151 of connecting cylinder 13 is in to the stability that connecting cylinder 13 and sealed piece 15 are fixed has been improved. A synchronizing rod 21 is slidably connected in the housing 1.

As shown in fig. 1 and fig. 2, a through hole 152 for accommodating the synchronizing rod 21 to slide is further coaxially formed in the sealing block 15, a sealing ring 153 for sealing with the circumferential surface of the synchronizing rod 21 is disposed on the inner wall of the through hole 152, a shaft tube 154 is disposed on a surface of one of the sealing blocks 15 facing away from the connecting cylinder 13, the shaft tube 154 and the through hole 152 are coaxially disposed, and the shaft tube 154 and the sealing block 15 are fixed to each other by screws; a blind plate 155 for plugging the through hole 152 is arranged on one surface of the other sealing block 15, which is far away from the connecting cylinder 13, a sealing column 156 is fixedly connected to one surface of the blind plate 155, which is fixed to the sealing block 15 through a screw, facing the sealing block 15, of the other sealing block 15, the sealing column 156 is inserted into the through hole 152 and abuts against the sealing ring 153 on the inner wall of the through hole 152 for sealing

Connecting bolts 17 are simultaneously arranged on two flange pieces 16 at opposite ends of two adjacent connecting cylinders 13 in a penetrating manner, a connecting nut 18 is arranged on the connecting bolts 17 in a threaded fit manner, and the two connecting cylinders 13 are coaxially connected and fixed through the threaded fit between the connecting bolts 17 and the connecting nut 18, and the two connecting cylinders 13 clamp and fix the middle connecting block 14. Further still the rigid coupling has connection piece 141 on the global of connecting block 14, and connection piece 141 is provided with two and is close to the both ends setting of connecting block 14 respectively, and connecting bolt 17 passes two connection pieces 141 to the fixed stability of connecting block 14 with connecting cylinder 13 has been improved.

As shown in fig. 2 and 3, the connecting block 14 and the sealing block 15 enclose an oil chamber 2 inside the connecting cylinder 13. The volumes of the oil cavities 2 in the two connecting cylinders 13 are equal, the effective areas are equal, and hydraulic oil is filled in the oil cavities 2. The synchronous rod 21 is simultaneously arranged in the two oil chambers 2 in a penetrating way, and the synchronous rod 21 penetrates through the connecting block 14 and is in sliding seal with the connecting block 14, so that the two oil chambers 2 are isolated from each other. A piston 3 is also arranged in each oil chamber 2, and the piston 3 is fixedly connected to the synchronous rod 21. So that the two pistons 3 can slide synchronously with the synchronizing rod 21 in the respective oil chambers 2 in the axial direction. The two oil inlets 11 are respectively communicated with the two oil chambers 2, and the oil outlets 12 are respectively communicated with the two oil chambers 2 in the same way; two oil inlets 11 are respectively arranged on the same side of the piston 3 in each oil chamber 2, and two oil outlets 12 are arranged on the other side of the piston 3 in each oil chamber 2.

When the oil pump supplies oil to the tee joint 111, hydraulic oil respectively enters the two oil inlets 11 after being shunted by the tee joint 111, so that the oil pressure at the oil inlets 11 pushes the piston 3 to slide towards the oil outlet 12, and at the moment, the piston 3 extrudes the hydraulic oil in the oil cavity 2 into the oil cylinder body connected at the oil outlet 12 and drives the oil cylinder body to work. Because two pistons 3 are simultaneously and the rigid coupling of synchronizing bar 21 to the stroke and the speed of two pistons 3 keep synchronous constantly, again because the volume of two oil pockets 2 is equal, and effective area is also equal, thereby two oil pockets 2 extrude the speed of hydraulic oil and are equal, and the oil pressure that two oil-out 12 departments produced is equal, and then makes two hydro-cylinder bodies can be with fast work simultaneously.

As shown in fig. 2 and 4, each piston 3 is provided with an adjusting assembly for oil supply or oil drainage, two ends of each piston 3 are respectively provided with a receiving hole 31 towards the center, the two receiving holes 31 are coaxially arranged, and the two receiving holes 31 are communicated with each other. A check valve 4 is also provided in each accommodation hole 31. The opening direction of the check valve 4 is directed from the outside of the piston 3 to the inside of the piston 3. Specifically, the check valve 4 includes a sealing cone block 41, the sealing cone block 41 is coaxially disposed in the receiving hole 31, a snap ring 42 is coaxially and fixedly connected to an inner wall of the receiving hole 31, a sealing ring 43 is clamped on the snap ring 42, the sealing ring 43 is coaxially disposed with the receiving hole 31, a clamping groove 431 is formed in an outer peripheral surface of the sealing ring 43 and is matched with the snap ring 42, and the sealing ring 43 is mutually clamped with the clamping groove 431 and the snap ring 42 to be connected with the inner wall of the receiving hole 31. The diameter of the big head end of the sealing conical block 41 is larger than the inner diameter of the sealing ring 43, and the inner diameter of the sealing ring 43 is larger than the diameter of the small head end of the sealing conical block 41. The big end of the sealing cone block 41 of the two one-way valves 4 is oppositely arranged, the big end of the sealing cone block 41 is also coaxially and fixedly connected with a mounting rod 44, a compression spring 45 is arranged between the two sealing cone blocks 41, and two ends of the compression spring 45 are respectively sleeved on the two mounting rods 44. The two seal tapered blocks 41 are separated from each other by the elastic force of the compression spring 45, and the tapered surfaces of the seal tapered blocks 41 are in contact with the seal ring 43 for sealing, thereby achieving sealing from the inside to the outside of the piston 3. When the outside pressure of the piston 3 is greater than the sum of the inside pressure of the piston 3 and the spring force, the sealing conical block 41 is pushed by the outside pressure to slide towards the inside of the piston 3, so that a gap is formed between the conical surface of the sealing conical block 41 and the sealing ring 43, the check valve 4 is opened, and hydraulic oil can enter the inside of the piston 3 through the check valve 4.

As shown in fig. 2 and 4, the small end of the piston 3 is further coaxially and fixedly connected with a contact rod 46, and the contact rod 46 is disposed to protrude from the end surface of the piston 3. The inner walls of the oil chamber 2 at the two axial ends of the synchronizing rod 21 are respectively provided with a ring groove 22, and the ring grooves 22 and the synchronizing rod 21 are coaxially arranged. The axis of the contact rod 46 is arranged parallel to the axis of the ring groove 22, and the projection of the axis of the contact rod 46 in the plane of the ring groove 22 falls on a circle on the inner circle of the ring groove 22. Two ring grooves 22 are provided, and the two ring grooves 22 are respectively located on the side walls of both ends of the oil chamber 2 in the axial direction of the synchronizing rod 21. The oil inlet 11 or the oil outlet 12 communicates with the ring groove 22. Specifically, the annular grooves 22 are formed in the end surfaces of the connecting block 14 and the sealing block 15, respectively.

When the piston 3 slides in the oil chamber 2 and one end of the piston 3 abuts against the corresponding side wall of the oil chamber 2, the contact rod 46 abuts against the inner wall of the oil chamber 2, so that the contact rod 46 pushes the check valve 4 to move towards the inside of the piston 3, and the check valve 4 is opened. The hydraulic oil now located in the ring groove 22 enters the interior of the piston 3. When the oil pressure at one end of an oil inlet 11 of the piston 3 is too high, the oil pressure can push a one-way valve 4 at one side of the oil inlet 11 to open, so that two ends of the piston 3 are communicated with each other, hydraulic oil passes through the piston 3 from one side of the oil inlet 11 of the oil cavity 2 and flows into one side of an oil outlet 12, and the oil supplementing work of the oil cylinder is completed; on the contrary, when the oil pressure in the oil cylinder body is too high, the hydraulic oil at one side of the oil outlet 12 of the oil cavity 2 flows into one side of the oil inlet 11 of the oil cavity 2 through the piston 3, and the oil drainage work of the oil cylinder is completed.

As shown in fig. 5, the piston 3 is formed by splicing two half cylinders, the corresponding receiving hole 31 is equally divided into two half holes, the two half holes are respectively disposed on the two half cylinders, and the snap ring 42 includes two half rings, and the two half rings are respectively fixedly connected in the half holes of the two half cylinders. Piston 3 has made things convenient for the staff to install check valve 4 in accommodation hole 31 by the setting of two semicylinders concatenation each other, has improved the convenience that piston 3 maintained ann and torn open.

A groove 32 of stepping down that is used for holding synchronizing bar 21 is seted up to two semicylinders one side in opposite directions, the cross-section of the groove 32 of stepping down is semi-circular, two back of stepping down the mutual lock of groove 32, form a complete circular, coaxial one of seting up on synchronizing bar 21 global with the fixed slot 211 that the groove 32 of stepping down mutually supported, the length and the 3 thickness of piston of fixed slot 211 equal, and after two mutual locks of semicylinders, the inner peripheral surface of the groove 32 of stepping down laminates with fixed slot 211 global each other. A positioning ring 33 is coaxially and fixedly connected in the receding groove 32, and a positioning groove 212 which is matched with the positioning ring 33 for clamping is coaxially arranged on the bottom wall corresponding to the fixing groove 211. When the two semicylinders are clasped on the synchronizing rod 21, the positioning ring 33 and the positioning groove 212 are mutually clamped, so that the piston 3 and the synchronizing rod 21 are mutually fixed. The stability of the connection between the piston 3 and the synchronizing rod 21 is improved by the matching of the abdicating groove 32 and the fixing groove 211 and the matching of the positioning ring 33 and the positioning groove 212; and facilitates the removal of the piston 3 from the synchronising rod 21 by the personnel involved in the maintenance.

As shown in fig. 5, a containing groove 5 is coaxially disposed on the outer peripheral surface of the piston 3, a hoop 51 for fixing two half-cylinders is disposed in the containing groove 5, the hoop 51 is semicircular and the hoop 51 is provided with two, two ends of the hoop 51 are respectively located on the two half-cylinders, a countersunk hole is respectively disposed at two ends of the hoop 51, a screw is penetrated in the countersunk hole, a screw thread penetrates into the half-cylinders and is connected with the half-cylinders by screw threads, and thus, the two screws at two ends of the hoop 51 are passed through, and the hoop 51 closes the two half-cylinders tightly. The anchor ear 51 is further sleeved with a sealing sleeve 52 (shown in fig. 4), and the outer circumferential surface of the sealing sleeve 52 and the inner circumferential surface of the oil chamber 2 are abutted and sealed with each other. The arrangement of the sealing sleeve 52 protects the anchor ear 51, and reduces the mutual abrasion between the anchor ear 51 and the inner wall of the oil chamber 2 when the piston 3 slides. On the other hand, the sealing sleeve 52 is abutted against the inner wall of the oil chamber 2, so that the sealing performance of the joint between the piston 3 and the oil chamber 2 is improved. The two sides of the outer peripheral surface of the piston 3, which are positioned in the containing groove 5, are respectively embedded with a rubber sleeve 53, and the rubber sleeves 53 are abutted with the inner wall of the oil cavity 2.

The implementation principle of the synchronous oil cylinder using the check valve for oil supplement is as follows: when the staff uses two hydro-cylinder bodies of oil supply device drive synchronous working, hydraulic oil gets into two oil inlets 11 from tee bend 111, and hydraulic oil promotes piston 3 and slides to the direction of oil-out 12, and two pistons 3 are synchronous with fast motion under the drive of synchronizing bar 21 to make the oil output of two oil-out 12 the same, order about the hydro-cylinder body synchronous working who installs respectively in two oil-out 12 departments. When one of the cylinder bodies is in an oil-out state, the contact rod 46 is pressed against the inner wall of the end part of the oil cavity 2, so that the one-way valve 4 on one side of the piston 3 is opened; at the moment, the one-way valve 4 on the other side of the piston 3 is opened under the action of hydraulic oil pressure, so that the two ends of the piston 3 are communicated, the oil supplementing device performs oil supplementing operation on the oil cylinder body which is lack of oil, and the synchronism of the two synchronous oil cylinders during operation is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. The utility model provides an use synchronous hydro-cylinder of check valve benefit oil which characterized in that: the oil supplementing device comprises a shell (1), a plurality of oil cavities (2) are formed in the shell (1) along the length direction, a synchronizing rod (21) penetrates through the oil cavities (2) simultaneously, a piston (3) is further arranged in each oil cavity (2), the piston (3) slides and seals with the inner wall of each oil cavity (2) along the axial direction of the synchronizing rod (21), the piston (3) is fixedly connected with the synchronizing rod (21), an adjusting assembly is arranged in the piston (3), the adjusting assembly comprises one-way valves (4) respectively arranged at two ends of the piston (3), the opening direction of each one-way valve (4) is from the outer side of the piston (3) to the inner side of the piston (3), and the one-way valves (4) are controlled to be opened and closed by the pressure in the oil cavities (2); an oil inlet (11) and an oil outlet (12) are further formed in the oil cavity (2), the oil inlet (11) and the oil outlet (12) are respectively located on two sides of the piston (3), and an oil cylinder body is further arranged on the oil outlet (12) of the oil supplementing device.

2. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 1, wherein: two accommodation holes (31) that are used for holding check valve (4) are seted up respectively at the both ends of piston (3), two accommodation holes (31) are coaxial to be set up and communicate each other, check valve (4) are including setting up sealed awl piece (41) in accommodation hole (31), be provided with between two sealed awl pieces (41) and be used for the top to hold compression spring (45) that two sealed awl pieces (41) kept away from each other, the microcephaly end of sealed awl piece (41) deviates from compression spring (45) and sets up, the coaxial rigid coupling of accommodation hole (31) inner peripheral surface has one and sealed awl piece (41) conical surface mutual butt sealed sealing ring (43).

3. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 2, wherein: the inner wall of the accommodating hole (31) is fixedly connected with a clamping ring (42), and a clamping groove (431) clamped and fixed with the clamping ring (42) is formed in the corresponding sealing ring (43).

4. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 2, wherein: the small end of the sealing conical block (41) is coaxially and fixedly connected with a feeler lever (46) which is used for being abutted against the inner wall of the oil cavity (2) so as to open the one-way valve (4).

5. The synchronous oil cylinder for supplementing oil by using the one-way valve according to claim 4, is characterized in that: an annular groove (22) is formed in the oil cavity (2) along the side walls of the two ends of the length direction of the shell (1), the axis of the feeler lever (46) is parallel to the axis of the annular groove (22), and the projection of the axis of the feeler lever (46) on the plane where the annular groove (22) is located falls on the circle of the inner circle of the annular groove (22).

6. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 1, wherein: the shell (1) comprises a plurality of coaxially arranged connecting cylinders (13), connecting blocks (14) arranged between every two adjacent connecting cylinders (13), and two sealing blocks (15) respectively arranged at the head end and the tail end of the connecting cylinders (13), the two adjacent connecting cylinders (13) are connected through flanges, and the connecting blocks (14) are clamped and fixed by the two adjacent connecting cylinders (13).

7. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 1, wherein: piston (3) respectively offer a groove of stepping down (32) that is used for holding synchronizing rod (21) including two semicylinders of splicing each other, two semicylinders one side in opposite directions, and it has a constant head tank (33) to go back the rigid coupling in groove of stepping down (32), offers constant head tank (212) of constant head tank (33) cooperation screens on corresponding the global of synchronizing rod (21).

8. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 7, wherein: a containing groove (5) is formed in the side face of the piston, an anchor ear (51) is arranged in the containing groove (5), and two ends of the anchor ear (51) are fixedly connected with the two semi-cylinders respectively.

9. The synchronous oil cylinder for supplementing oil by using the check valve as claimed in claim 8, wherein: and a sealing sleeve (52) is further arranged on the outer side of the hoop (51), and the outer peripheral surface of the sealing sleeve (52) is in abutting and sealing contact with the inner wall of the connecting cylinder (13).

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