CN112780633A

CN112780633A - Double-cylinder hydraulic oil cylinder

Info

Publication number: CN112780633A
Application number: CN202110013249.6A
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: 2021-05-11
Anticipated expiration: 2041-01-06
Also published as: CN112780633B

Abstract

The invention relates to the technical field of hydraulic cylinders and discloses a double-cylinder hydraulic oil cylinder which comprises an oil cylinder and a piston rod, wherein the oil cylinder is movably sleeved with the piston rod, the right end of the oil cylinder is fixedly sleeved with a guide sleeve, a flange is fixedly sleeved on the guide sleeve, and a base is fixedly installed at the left end of the oil cylinder. Through two hydro-cylinders and two piston rod symmetric distribution settings, make to use the hydro-cylinder as the fixed point, two piston rods can carry out reciprocating motion to both sides respectively, increase the output direction of pneumatic cylinder, simultaneously, through the setting of semiring board and half support cover, make the pneumatic cylinder can divide into two kinds of motion forms, one of them, use the hydro-cylinder as the fixed point, two piston rods support the pressure effect to both sides respectively, its two, use the end of two piston rods as the fixed point respectively, make to produce relative displacement between semiring board and the half support cover, and then increase the stroke of pneumatic cylinder, improve the function of pneumatic cylinder, increase the application scope of pneumatic cylinder.

Description

Double-cylinder hydraulic oil cylinder

Technical Field

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

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion, has simple structure and reliable work, can omit a speed reducer when the hydraulic cylinder is used for realizing the reciprocating motion, has no transmission clearance and moves stably, so the hydraulic cylinder is widely applied to various mechanical hydraulic systems, the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston, and in the actual application process, a single piston and a single oil cylinder are used most widely, but the hydraulic cylinder has some defects in the use process, as follows:

one of the two cylinders needs to be relatively fixed when used as a supporting point, and the two cylinders are mutually sleeved, so that the effective stroke of the hydraulic cylinder is greatly shortened, and meanwhile, the hydraulic cylinder can only output in one direction, and the function is single.

Secondly, when the hydraulic cylinder runs, the mass with a large load usually makes a rapid reciprocating motion, the mass has a large momentum, when the piston moves to the terminal, mechanical collision with the oil cylinder often occurs to the piston, and large impact and noise are generated, and the generation of the impact phenomena not only influences the working performance of mechanical equipment, but also causes damage to the hydraulic cylinder and damage to related parts such as piping, valves and instruments in the system, and the hydraulic cylinder has great harmfulness.

Disclosure of Invention

The invention provides a double-cylinder hydraulic oil cylinder which has the advantages of large stroke, multiple functional forms and good damping performance and solves the problems in the background technology.

The invention provides the following technical scheme: a double-cylinder hydraulic oil cylinder comprises an oil cylinder and a piston rod, wherein the oil cylinder is movably sleeved with the piston rod, a guide sleeve is fixedly sleeved at the right end of the oil cylinder, a flange is fixedly sleeved on the guide sleeve, a base is fixedly installed at the left end of the oil cylinder, the base and the piston rod are symmetrically installed in the left-right direction, two symmetrical surfaces of the base are fixedly connected, an impact head is fixedly installed at one end, close to the base, of the piston rod, a buffer device is fixedly installed inside the base, a first oil hole is formed in the top of one end, far away from the base, of the oil cylinder, a second oil hole is formed in the top of the base and communicated with an inner cavity of the oil cylinder, a semi-ring plate is fixedly installed at the bottom of the outer side of the oil cylinder, a semi-ring piston is fixedly installed in the middle of the, hydraulic oil holes are formed in the half supporting sleeve on two sides of the half ring piston, a fixed seat is fixedly mounted at the bottom of the half supporting sleeve, and rib plates are fixedly mounted on the upper surface of the fixed seat on two sides of the half supporting sleeve;

the buffer device comprises a buffer channel and a transmission channel, an oil hole II is communicated with the right end of the buffer channel, the buffer channel is movably sleeved with an impact head, a sealing device is movably mounted on the left side of the buffer channel in the transmission channel, a limiting spring I is movably mounted on the left side of the sealing device in the transmission channel, two ends of the limiting spring I are fixedly connected with the inner wall of the base and the left side of the sealing device respectively, a limiting spring II is movably mounted on two sides of the buffer channel in the transmission channel, the left end of the limiting spring II is fixedly connected with the base, a pressing part is fixedly connected with the right end of the limiting spring II, the pressing part is movably sleeved with the transmission channel, and hydraulic oil is filled between the pressing part and the sealing device in the transmission channel.

Preferably, the pressure sealing device comprises a piston rod, the piston rod is movably sleeved with the transmission channel, a supporting plate is fixedly mounted at the right end of the piston rod, a damping spring is fixedly connected to the right side of the pressure sealing device, and a piston plate is fixedly connected to the right end of the damping spring.

Preferably, the buffering channel consists of a left part and a right part, the right part of the buffering channel is cylindrical and is movably sleeved with the impact head, the left part of the buffering channel is conical, the minimum diameter of the left part of the buffering channel is at the right end, and the minimum diameter of the left part of the buffering channel is the same as the diameter of the piston plate.

Preferably, the length of the inner cavity of the half support sleeve is equal to half of that of the half ring plate, the half support sleeve is filled with hydraulic oil, and the oil pressure of two sides of the half ring piston is the same.

The invention has the following beneficial effects:

1. through two hydro-cylinders and two piston rod symmetric distribution settings, make to use the hydro-cylinder as the fixed point, two piston rods can carry out reciprocating motion to both sides respectively, increase the output direction of pneumatic cylinder, simultaneously, through the setting of semiring board and half support cover, make the pneumatic cylinder can divide into two kinds of motion forms, one of them, use the hydro-cylinder as the fixed point, two piston rods support the pressure effect to both sides respectively, its two, use the end of two piston rods as the fixed point respectively, make to produce relative displacement between semiring board and the half support cover, and then increase the stroke of pneumatic cylinder, improve the function of pneumatic cylinder, increase the application scope of pneumatic cylinder.

2. Through the arrangement of the buffer device and the impact head, when the piston rod returns, the impact head is brought into the buffer channel to be sleeved, hydraulic oil in the buffer channel is pushed to the left, meanwhile, the piston rod presses the pressing piece to the left, the hydraulic oil in the transmission channel pushes the pressing device to the right, the hydraulic oil in the buffer channel is blocked, the hydraulic oil collides with the piston plate, the damping spring is compressed, the oil discharge channel is opened, the hydraulic oil in the buffer channel is throttled, the hydraulic oil in the buffer channel generates pressure due to throttling action, at the moment, the mechanical kinetic energy of the impact head which continues to move is absorbed by the hydraulic oil in the buffer channel, the internal pressure generated in the buffer channel collides with the inertia force of the impact head, the piston rod is buffered and decelerated, the impact collision of the piston rod is effectively reduced, and the impact noise is reduced.

Drawings

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

FIG. 2 is a schematic front view of the structure of the present invention;

FIG. 3 is a schematic view of the invention at A-A in FIG. 1;

FIG. 4 is an enlarged view of the point B in FIG. 1.

In the figure: 1. an oil cylinder; 2. a base; 3. a piston rod; 4. an impact head; 5. a buffer device; 51. a buffer channel; 52. a sealing and pressing device; 521. a piston rod; 522. a support plate; 523. a damping spring; 524. a piston plate; 53. a transmission channel; 54. a first limiting spring; 55. a pressing member; 56. a second limiting spring; 6. a guide sleeve; 7. a flange; 8. a first oil hole; 9. an oil hole II; 10. a semi-annular plate; 11. a semi-ring piston; 12. a support sleeve; 13. a fixed seat; 16. a rib plate.

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. 1-4, a double-cylinder hydraulic cylinder comprises a cylinder 1 and a piston rod 3, the cylinder 1 is movably sleeved with the piston rod 3, a guide sleeve 6 is fixedly sleeved at the right end of the cylinder 1, a flange 7 is fixedly sleeved on the guide sleeve 6, a base 2 is fixedly installed at the left end of the cylinder 1, the base 2 and the piston rod 3 are symmetrically installed in the left and right directions, the symmetric surfaces of the two bases 2 are fixedly connected, an impact head 4 is fixedly installed at one end of the piston rod 3 close to the base 2, a buffer device 5 is fixedly installed inside the base 2, an oil hole I8 is installed at the top of one end of the cylinder 1 far away from the base 2, an oil hole II 9 is installed at the top of the base 2, the oil hole II 9 is communicated with an inner cavity of the cylinder 1, a semi-ring plate 10 is fixedly installed at the bottom of the outer side of the cylinder 1, the semi-ring piston 11 is movably connected with a semi-support sleeve 12, hydraulic oil holes are formed in the semi-support sleeve 12 and located on two sides of the semi-ring piston 11, a fixed seat 13 is fixedly installed at the bottom of the semi-support sleeve 12, and rib plates 16 are fixedly installed on the upper surface of the fixed seat 13 and located on two sides of the semi-support sleeve 12;

the buffer device 5 comprises a buffer channel 51 and a transmission channel 53, the oil hole two 9 is communicated with the right end of the buffer channel 51, the buffer channel 51 is movably sleeved with the impact head 4, a pressure sealing device 52 is movably mounted in the transmission channel 53 and on the left side of the buffer channel 51, a limit spring one 54 is movably mounted in the transmission channel 53 on the left side of the pressure sealing device 52, two ends of the limit spring one 54 are fixedly connected with the inner wall of the base 2 and the left side of the pressure sealing device 52 respectively, a limit spring two 56 is movably mounted in the transmission channel 53 and on two sides of the buffer channel 51, the left end of the limit spring two 56 is fixedly connected with the base 2, a pressing piece 55 is fixedly connected with the right end of the limit spring two 56, the pressing piece 55 is movably sleeved with the transmission channel 53, and hydraulic oil is filled between the pressing piece 55 and the pressure sealing device 52 in the transmission.

Wherein, the pressure sealing device 52 includes a piston rod 521, the piston rod 521 is movably sleeved with the transmission channel 53, a support plate 522 is fixedly installed at the right end of the piston rod 521, a damping spring 523 is fixedly connected to the right side of the pressure sealing device 52, and a piston plate 524 is fixedly connected to the right end of the damping spring 523, when the piston rod 3 returns, the impact head 4 is brought into the buffer channel 51 to be sleeved, hydraulic oil in the buffer channel 51 is pushed to the left, and meanwhile, the piston rod 3 presses the pressing part 55 to the left, so that the hydraulic oil in the transmission channel 53 pushes the pressure sealing device 52 to the right, hydraulic oil in the buffer channel 51 is sealed, the hydraulic oil impacts on the piston plate 524 to compress the damping spring 523, the oil discharge channel is opened, hydraulic oil in the buffer channel 51 is throttled, pressure is generated by the hydraulic oil in the buffer channel 51 due to throttling action, at this time, mechanical kinetic energy of the impact head 4 which continues to move is absorbed, the internal pressure generated in the buffer passage 51 collides with the inertia force of the impact head 4, so that the piston rod 3 is buffered and decelerated, the impact collision of the piston rod 3 is effectively reduced, and the impact noise is reduced.

Wherein, buffer channel 51 has two parts of left and right sides to constitute, buffer channel 51's right part is cylindrical and cup joints with the activity of impact head 4, buffer channel 51's left part is conical and minimum diameter at the right-hand member, buffer channel 51's left part minimum diameter size is the same with the diameter size of piston plate 524, when making the inside hydraulic oil of buffer channel 51 meet and collide with piston plate 524, for better buffering throttle, piston plate 524 is under the impact of hydraulic oil, piston plate 524 removes to the left, open the hydraulic oil outflow passageway, change along with the change of percussion pressure, and then gradually subduct the impact force to piston rod 3, reduce the vibrations of pneumatic cylinder.

The length of the inner cavity of the half supporting sleeve 12 is equal to half of that of the half ring plate 10, the half supporting sleeve 12 is filled with hydraulic oil, and the oil pressures on the two sides of the half ring piston 11 are the same, so that the half ring piston 11 is kept still under the fixation of the hydraulic oil, when the relative displacement between the half ring plate 10 and the half supporting sleeve 12 needs to be carried out, the oil pressure between the half ring plate 10 and the half supporting sleeve 12 can be changed, the half supporting sleeve moves under the pressing of the piston rod 3, and the stroke of the hydraulic cylinder is enlarged.

The working principle includes that firstly, a fixed seat 13 is used as a fixed point, hydraulic oil can be respectively injected into a first oil hole 8 and a second oil hole 9 through a hydraulic pump, oil pressure on two sides of a piston is changed, extension and retraction of a piston rod 3 are further controlled, meanwhile, the hydraulic oil can be injected into a half support sleeve 12, the semi-ring piston 11 is moved by adjusting the oil pressure on two sides of the semi-ring piston 11, the oil cylinder 1 is driven by a semi-ring plate 10 to move, the position is adjusted, the action range of the hydraulic cylinder is adjusted, and secondly, the end head of one piston rod 3 is used as the fixed point, the hydraulic oil is injected into a second oil hole 9 close to the fixed point, the hydraulic cylinder is moved, at the moment, the semi-ring piston 11 can move in the half support sleeve 12, and attention is paid to the need of controlling the pressure of the hydraulic; thirdly, when the piston rod 3 returns, the impact head 4 is brought into the buffer channel 51 to be sleeved, hydraulic oil in the buffer channel 51 is pushed to the left, the pressing piece 55 is pressed to the left by the piston rod 3, so that the hydraulic oil in the transmission channel 53 pushes the sealing device 52 to the right to seal the hydraulic oil in the buffer channel 51, the hydraulic oil collides with the piston plate 524 to compress the damping spring 523, the oil discharge channel is opened to throttle the hydraulic oil in the buffer channel 51, the hydraulic oil in the buffer channel 51 generates pressure due to throttling action, at this time, the mechanical kinetic energy of the impact head 4 which continues to move is absorbed by the hydraulic oil in the buffer channel 51, the internal pressure generated in the buffer channel 51 collides with the inertia force of the impact head 4, when the impact head 4 is pulled out of the buffer channel 51, the first limit spring 54 pulls the sealing device 52 back, the second limit spring 56 pushes the pressing piece 55 out, waiting for the next buffering action.

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 double-cylinder hydraulic cylinder, includes hydro-cylinder (1) and piston rod (3), hydro-cylinder (1) cup joints with piston rod (3) activity, the fixed uide bushing (6) that has cup jointed of right-hand member of hydro-cylinder (1), the fixed flange (7) that has cup jointed on uide bushing (6), its characterized in that: the left end of the oil cylinder (1) is fixedly provided with a base (2), the oil cylinder (1), the base (2) and a piston rod (3) are symmetrically installed in a left-right mode, two symmetrical surfaces of the base (2) are fixedly connected, one end, close to the base (2), of the piston rod (3) is fixedly provided with an impact head (4), the inner portion of the base (2) is fixedly provided with a buffering device (5), the top portion, far away from the base (2), of one end of the oil cylinder (1) is provided with an oil hole I (8), the top portion of the base (2) is provided with an oil hole II (9), the oil hole II (9) is communicated with an inner cavity of the oil cylinder (1), the bottom portion of the outer side of the oil cylinder (1) is fixedly provided with a semi-ring plate (10), the middle portion of the semi-ring plate (10) is fixedly provided with a piston (11), and a semi, the semi-ring piston (11) is movably connected with a semi-support sleeve (12), hydraulic oil holes are formed in the semi-support sleeve (12) and located on two sides of the semi-ring piston (11), a fixed seat (13) is fixedly installed at the bottom of the semi-support sleeve (12), and rib plates (16) are fixedly installed on the upper surface of the fixed seat (13) and located on two sides of the semi-support sleeve (12);

the buffer device (5) comprises a buffer channel (51) and a transmission channel (53), an oil hole II (9) is communicated with the right end of the buffer channel (51), the buffer channel (51) is movably sleeved with an impact head (4), a pressure sealing device (52) is movably mounted in the transmission channel (53) and positioned on the left side of the buffer channel (51), a limit spring I (54) is movably mounted in the transmission channel (53) and positioned on the left side of the pressure sealing device (52), two ends of the limit spring I (54) are respectively fixedly connected with the inner wall of the base (2) and the left side of the pressure sealing device (52), limit springs II (56) are movably mounted in the transmission channel (53) and positioned on two sides of the buffer channel (51), the left ends of the limit springs II (56) are fixedly connected with the base (2), a pressing piece (55) is fixedly connected with the right end of the limit springs II (56), the pressing piece (55) is movably sleeved with the transmission channel (53), and hydraulic oil is filled in the transmission channel (53) and between the pressing piece (55) and the sealing device (52).

2. The dual cylinder hydraulic ram of claim 1, wherein: the sealing and pressing device (52) comprises a piston rod (521), the piston rod (521) is movably sleeved with the transmission channel (53), a supporting plate (522) is fixedly mounted at the right end of the piston rod (521), a damping spring (523) is fixedly connected to the right side of the sealing and pressing device (52), and a piston plate (524) is fixedly connected to the right end of the damping spring (523).

3. The dual cylinder hydraulic ram of claim 1, wherein: the buffer passage (51) is composed of a left part and a right part, the right part of the buffer passage (51) is cylindrical and is movably sleeved with the impact head (4), the left part of the buffer passage (51) is conical, the minimum diameter of the left part of the buffer passage (51) is at the right end, and the minimum diameter of the left part of the buffer passage (51) is the same as that of the piston plate (524).

4. The dual cylinder hydraulic ram of claim 1, wherein: the length of an inner cavity of the half support sleeve (12) is equal to half of that of the half ring plate (10), hydraulic oil is filled in the half support sleeve (12), and oil pressure of two sides of the half ring piston (11) is the same.