CN110388352B

CN110388352B - Multi-stage hydraulic cylinder

Info

Publication number: CN110388352B
Application number: CN201910722650.XA
Authority: CN
Inventors: 陈大山
Original assignee: Yangzhou Dashan Hydraulic And Pneumatic Manufacturing Co ltd
Current assignee: Yangzhou Dashan Hydraulic And Pneumatic Manufacturing Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-07-28
Anticipated expiration: 2039-08-06
Also published as: CN110388352A

Abstract

The invention relates to the technical field of mechanical manufacturing, and discloses a multistage hydraulic cylinder, which comprises a hydraulic rod and a cylinder body, wherein the hydraulic rod is movably arranged in the cylinder body, a first sealing column and a second sealing column are arranged in the cylinder body, the second sealing column is sleeved in the first sealing column, a fixing sleeve is fixedly arranged at the left side of the cylinder body, the hydraulic rod penetrates through the fixing sleeve and is sleeved in the second sealing column, a telescopic sleeve is fixedly arranged at the bottom of the right side of the cylinder body, a spring is fixedly arranged in the telescopic sleeve, two first through holes with the same size are formed in a circle enclosed by the telescopic sleeve in the first sealing column, a first sealing plug is arranged in the first sealing column, the multistage hydraulic cylinder adopts the first sealing column, the second sealing column and the hydraulic rod to carry out multistage hydraulic pressure, and when the installation space is limited to form an occasion with a long requirement, the multistage hydraulic cylinder can provide higher output, better effect can be achieved during construction, and the using effect of the hydraulic cylinder is improved.

Description

Multi-stage hydraulic cylinder

Technical Field

The invention relates to the technical field of machine manufacturing, in particular to a multi-stage hydraulic cylinder.

Background

The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. It has simple structure and reliable operation. When the reciprocating motion is realized by using the hydraulic cylinder, a speed reducer can be omitted, no transmission gap exists, and the reciprocating motion is stable, so that the hydraulic cylinder is widely applied to hydraulic systems of various machines. The pneumatic cylinder can extrude cylinder body inner wall downwards because the hydraulic stem can extrude when the extrusion is first, can collide the cylinder body, but the buffer that sets up in the current cylinder body can only absorb the impact force subtotal that the hydraulic stem produced in the cylinder body, most power still can act on cylinder body inner wall, make pneumatic cylinder body life shorten for a long time, the cylinder body damages more easily, and current pneumatic cylinder is mostly single-stage pneumatic cylinder usually, receive the restriction and form when requiring very long occasion at installation space, excellent in use effect.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides the multistage hydraulic cylinder which has the advantages of completely absorbing the impact force received in the cylinder body and the like, and solves the problems.

(II) technical scheme

In order to achieve the above purpose, the invention provides the following technical scheme: the multistage hydraulic cylinder comprises a hydraulic rod and a cylinder body, wherein the hydraulic rod is movably arranged in the cylinder body, a first sealing column and a second sealing column are arranged in the cylinder body, the second sealing column is sleeved in the first sealing column, the first sealing column is a cylinder with a through left side, the size of one end, close to the tail end of the cylinder body, of the first sealing column is the same as that of an inner cavity of the cylinder body, a fixing sleeve is fixedly arranged on the left side of the cylinder body, the hydraulic rod penetrates through the fixing sleeve and is sleeved in the second sealing column, a telescopic sleeve is fixedly arranged at the bottom of the right side of the cylinder body, a plurality of springs are fixedly arranged in the telescopic sleeve at equal intervals, one end of each spring is fixedly connected with the inner wall of the cylinder body, the other end of each spring is fixedly arranged on the left wall of the telescopic sleeve, a circle of the telescopic sleeve is fixedly arranged along, the size of a ring formed by enclosing the first sealing column and the second sealing column in a telescopic way corresponds to the diameter of the inner cavity of the first sealing column and the second sealing column respectively, two first through holes with the same size are formed in a circle enclosed by the telescopic way in the first sealing column, the first through holes are symmetrically formed in the first sealing column from front to back, the first through holes penetrate through the first sealing column, a first sealing plug is arranged in the first sealing column and consists of a round cake and a cylinder, the diameter of the cylinder of the first sealing plug is smaller than that of the first through holes by one centimeter, the diameter of the round cake of the first sealing plug is twice that of the first through holes, the first sealing plug is sleeved in the first through holes, the first sealing plugs are sleeved in the two first through holes, the two first sealing plugs are arranged on the left side and the right side of the first sealing column respectively, one side of the round cake of the first sealing plug, which is close to the first sealing column, is provided with a blocking spring, the resistance spring is sleeved on the first sealing plug cylinder, the two ends of the resistance spring are respectively and fixedly installed on one side, close to the first sealing column, of the first sealing column and the first sealing plug round cake, two telescopic rods are arranged in the resistance spring, the two ends of each telescopic rod are respectively and fixedly installed on one side, close to the first sealing column, of the first sealing column and the first sealing plug round cake, the two telescopic rods are symmetrically installed in the front-back direction by taking the first sealing plug as a middle point, a second through hole is formed in the position, corresponding to the first sealing column, of the second sealing column, the size ratio between the second through hole and the second sealing column is the same as the ratio between the first sealing column and the first through hole, and the second sealing column and the second through hole are provided with a second sealing plug, a stop spring and a telescopic rod which are the same as those between the first sealing column and the first through hole, and the proportion of the devices on the second sealing column corresponds to the proportion of the devices on the first sealing column.

Preferably, the side wall of the telescopic sleeve is of a soft telescopic structure, the left wall of the telescopic sleeve is of a hard structure, and the telescopic sleeve is cuboid.

Preferably, three springs are fixedly arranged in the telescopic sleeve.

Preferably, a circle with the diameter being one third of the inner diameter of the cylinder body is reserved at the midpoint of the bottom of the cylinder body of the telescopic sleeve.

Preferably, the telescopic rod is a multi-section telescopic rod.

(III) advantageous effects

Compared with the prior art, the invention provides a multistage hydraulic cylinder, which has the following beneficial effects:

1. this multistage pneumatic cylinder adopts first sealed post, the sealed post of second and hydraulic stem to carry out multistage hydraulic pressure, receives the restriction and when forming the very long occasion of requirement at installation space, multistage pneumatic cylinder can provide the power with ordinary pneumatic cylinder isodynamic size in the little space, can reach better effect when letting the construction, has improved the result of use of pneumatic cylinder.

2. The multistage hydraulic cylinder is characterized in that the telescopic sleeve is arranged to buffer the impact force received in the cylinder body, the telescopic sleeve is arranged at the bottom of the cylinder body for one circle, so that the pressure applied to the whole surface of the first sealing column can be decomposed when the first sealing column is pressed to the bottommost part in the cylinder body, the telescopic sleeve arranged in the first sealing column and the second sealing column can perform proportion conversion according to the size of the first sealing column and the second sealing column, the telescopic sleeve in the first sealing column and the second sealing column can decompose the pressure with corresponding size according to the corresponding position of the telescopic sleeve, meanwhile, the telescopic sleeve and the spring can absorb the impact force received at the bottom of the cylinder body by the telescopic sleeve when the first sealing column moves towards the bottom of the cylinder body, then the telescopic sleeve absorbs the impact force and shrinks towards the bottom of the cylinder body, and the telescopic sleeve can decompose and dilute a part of the absorbed force through the side wall of the telescopic sleeve, and a part of force can be directly transmitted to the bottom of the cylinder body from the telescopic sleeve, so that the phenomenon that the inside of the cylinder body is directly impacted by the hydraulic rod to reduce the service life of the hydraulic cylinder is avoided, and the service life of the device is prolonged.

3. This multistage hydraulic cylinder, it comes supplementary telescope tube to cushion to have set up the spring in the telescope tube, the design of telescope tube appearance can let sealed post press the telescope tube when moving, the telescope tube can reduce as far as, pressure is sufficient when guaranteeing hydraulic pressure, simultaneously when the telescope tube absorbs the impact force and contracts to cylinder body bottom, the spring can carry out the secondary with the power that the telescope tube received and decompose, then the impact force with remaining is transmitting to the cylinder body, the spring has also reduced the speed of first sealed post and cylinder body bottom collision simultaneously, the impact force size that the cylinder body received has been reduced, the service life of device has been increased.

4. This multistage pneumatic cylinder, use and hinder spring and first sealing plug, the second sealing plug carries out the flow of the oil body, the oil body in the cylinder body receives the extrusion back, the oil body can flow in to first sealed post from first through-hole, promote first sealing plug simultaneously and move to the direction of second sealed post, and hinder the spring and also can absorb the bounce-back with the impact force that the second sealed post that just received gave, thereby let between the oil body can the first sealed post of easier entering and the second sealed post, the oil body also can protect hindering the spring simultaneously, thereby prevent to hinder the spring and rust and influence device result of use, the result of use of device has been increased.

5. This multistage pneumatic cylinder uses the telescopic link to cooperate and hinders spring and first sealing plug, the second sealing plug uses, when the oil body gets into between first sealing post and the second sealing post, the telescopic link can be through self flexible come first sealing plug to be fixed in original position, and the telescopic link also can reduce area of space's occupation through self flexible when withdrawing, has increased the result of use of device.

Drawings

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

FIG. 2 is a sectional view of the main structure of the present invention;

FIG. 3 is a partial structural view of a first sealing post according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 3 according to the present invention;

FIG. 5 is a left side view of a first seal post configuration of the present invention;

FIG. 6 is a partial structural view of the main body of the present invention;

FIG. 7 is an enlarged view of the structure at B in FIG. 6 according to the present invention;

FIG. 8 is a partial structural view of the main body of the present invention.

In the figure: the hydraulic cylinder comprises a hydraulic rod 1, a cylinder body 2, a first sealing column 3, a second sealing column 4, a fixing sleeve 5, a telescopic sleeve 6, a spring 7, a first through hole 8, a first sealing plug 9, a blocking spring 10, an expansion rod 11, a second through hole 12 and a second sealing plug 13.

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. 1-8, the multistage hydraulic cylinder includes a hydraulic rod 1 and a cylinder body 2, the hydraulic rod 1 is movably installed in the cylinder body 2, a first sealing column 3 and a second sealing column 4 are arranged in the cylinder body 2, the second sealing column 4 is sleeved in the first sealing column 3, the first sealing column 3 is a cylinder with a through left side, the end of the first sealing column 3 close to the end of the cylinder body 2 has the same size as the inner cavity of the cylinder body 2, the specific shape of the second sealing column 4 is as shown in fig. 2, a fixing sleeve 5 is fixedly installed on the left side of the cylinder body 2, the hydraulic rod 1 is sleeved in the second sealing column 4 through the fixing sleeve 5, the fixing sleeve 5 ensures that the hydraulic rod 1 cannot be dislocated during operation, so as to prevent the device from being damaged due to the dislocation of the hydraulic rod 1 during operation, a telescopic sleeve 6 is fixedly installed at the bottom of the right side of the cylinder body 2, the side, the telescopic sleeve 6 is cuboid, three springs 7 are fixedly installed in the telescopic sleeve 6, the springs 7 are arranged in the telescopic sleeve 6 at equal intervals, one end of each spring 7 is fixedly connected with the inner wall of the cylinder body 2, the other end of each spring 7 is fixedly installed on the left wall of the telescopic sleeve 6, the telescopic sleeve 6 is fixedly installed in a circle along the bottom of the cylinder body 2, a circle with the diameter being one third of the inner diameter of the cylinder body 2 is reserved at the midpoint of the bottom of the cylinder body 2 of the telescopic sleeve 6, the telescopic sleeve 6 and the springs 7 can absorb impact force applied to the bottom of the cylinder body 2 when the first sealing column 3 moves towards the bottom of the cylinder body 2, then the telescopic sleeve 6 shrinks towards the bottom of the cylinder body 2 after absorbing the impact force, so as to extrude the springs 7, and the telescopic sleeve 6 can decompose and dilute a part of the absorbed force through the side wall of the telescopic sleeve 6, and a part of component of the, the rest force is transmitted to the spring 7, simultaneously, after the spring 7 absorbs the impact force absorbed by the telescopic sleeve 6 again, the spring 7 transmits the impact force which is absorbed for many times and diluted to the bottom of the cylinder body 2, thereby the cylinder body 2 transmits all the impact force for many times, the impact force which can be received by the cylinder body 2 when being impacted is reduced, simultaneously, the spring 7 can also reduce the collision speed of the first sealing column 3 and the bottom of the cylinder body 2, the telescopic sleeve 6 and the spring 7 which are the same as the above are fixedly arranged in the first sealing column 3 and the second sealing column 4, simultaneously, the size of the circle which is formed by the telescopic sleeve 6 on the first sealing column 3 and the second sealing column 4 is respectively corresponding to the diameter of the inner cavity of the first sealing column 3 and the diameter of the inner cavity of the second sealing column 4, two first through holes 8 which are the same as the size are arranged in the circle which is formed by the telescopic sleeve 6 in the first sealing column 3, the first through holes 8 are symmetrically arranged in the first sealing column 3 in a front-back manner, the first through holes 8 penetrate through the first sealing column 3, first sealing plugs 9 are arranged in the first sealing column 3, each first sealing plug 9 consists of a round cake and a cylinder, the diameter of the cylinder of each first sealing plug 9 is one centimeter smaller than that of the corresponding first through hole 8, the diameter of the round cake of each first sealing plug 9 is twice that of the corresponding first through hole 8, the first sealing plugs 9 are sleeved in the first through holes 8, the first sealing plugs 9 are sleeved in the two first through holes 8, the two first sealing plugs 9 are respectively arranged on the left side and the right side of the first sealing column 3, one side, close to the first sealing column 3, of the round cake of each first sealing plug 9 is provided with a blocking spring 10, the blocking spring 10 is sleeved on the cylindrical sealing plug of the first sealing plug 9, and two ends of the blocking spring 10 are respectively fixedly arranged on one sides, close to the first sealing column 3 and the first sealing plug 9, close to the first, two telescopic rods 11 are arranged in the blocking spring 10, the telescopic rods 11 are multi-section telescopic rods, two ends of each telescopic rod 11 are respectively fixedly installed at one side, close to the first sealing column 3, of the first sealing column 3 and one side, close to the first sealing column 3, of the circular cakes of the first sealing column 3 and the first sealing plug 9, the two telescopic rods 11 are symmetrically installed front and back with the first sealing plug 9 as a midpoint, when the first sealing column 3 is extruded by the second sealing column 4, the second sealing column 4 firstly extrudes the telescopic sleeve 6 and the spring 7 on the first sealing column 3, then the second sealing column 4 continuously extrudes the first sealing column 3, the first sealing column 3 is further extruded after the first sealing column 9 is extruded, the first sealing column 3 is extruded to the cylinder body 2 after being impacted, meanwhile, oil in the cylinder body 2 flows into the first sealing column 3 from the first through hole 8, and simultaneously pushes the first sealing plug 9 to move towards the direction of the second sealing column 4, the blocking spring 10 can absorb the impact force given by the second sealing column 4, so that the oil body can more easily enter between the first sealing column 3 and the second sealing column 4, meanwhile, the oil body can also protect the blocking spring 10, the blocking spring 10 is prevented from rusting, the use effect of the device is influenced, the two telescopic rods 11 prevent the oil body from dropping the first sealing plug 9 when entering between the first sealing column 3 and the second sealing column 4, so that the device cannot be used continuously, when the device is retracted, the other first sealing plug 9 arranged can move opposite to the first sealing plug 9, so that the oil body normally flows back into the cylinder body 2, the second sealing column 4 is provided with a second through hole 12 at a position corresponding to the first sealing column 3, and the size ratio between the second through hole 12 and the second sealing column 4 is the same as the ratio between the first sealing column 3 and the first through hole 8, and the second sealing column 4 and the second through hole 12 are provided with a second sealing plug 13, a stop spring 10 and an expansion link 11 which are the same as those between the first sealing column 3 and the first through hole 8, and the proportion of the device on the second sealing column 4 corresponds to that on the first sealing column 4.

When in use, the utility model is used,

in the first step, when the telescopic sleeve 6 and the spring 7 can move towards the bottom of the cylinder body 2 at the first sealing column 3, the impact force to be applied to the bottom of the cylinder body 2 is absorbed by the telescopic sleeve 6, then the telescopic sleeve 6 absorbs the impact force and then contracts towards the bottom of the cylinder body 2, thereby pressing the spring 7, and the telescopic sleeve 6 can decompose and dilute part of the absorbed force through the side wall of the telescopic sleeve 6, part of the force can be directly transmitted to the bottom of the cylinder body 2 from the telescopic sleeve 6, and the force can be transmitted to the spring 7, meanwhile, after the spring 7 absorbs the impact force absorbed by the telescopic sleeve 6 again, the spring 7 transmits the impact force which is absorbed for many times and diluted to the bottom of the cylinder body 2, therefore, the cylinder body 2 transmits all impact force for multiple times, the impact force which can be received when the cylinder body 2 is impacted is reduced, and meanwhile, the spring 7 can also reduce the collision speed of the first sealing column 3 and the bottom of the cylinder body 2.

Secondly, when the second sealing column 4 extrudes the first sealing column 3, the second sealing column 4 will extrude the telescopic sleeve 6 and the spring 7 on the first sealing column 3 first, then the second sealing column 4 will continue to extrude into the first sealing column 3, and extrude the first sealing column 3 after extruding the first sealing plug 9, and the first sealing column 3 will extrude the cylinder body 2 after receiving impact force, and simultaneously the oil body in the cylinder body 2 will flow into the first sealing column 3 from the first through hole 8, and simultaneously push the first sealing plug 9 to move towards the direction of the second sealing column 4, and the blocking spring 10 can also absorb and rebound the impact force given by the second sealing column 4, so that the oil body can more easily enter between the first sealing column 3 and the second sealing column 4, and simultaneously the oil body can also protect the blocking spring 10, thereby preventing the blocking spring 10 from rusting and affecting the use effect of the device, the two telescopic rods 11 prevent the oil body from rushing down the first sealing plug 9 when entering between the first sealing column 3 and the second sealing column 4, so that the device cannot be used continuously.

In a third step, during retraction, the other first sealing plug 9 is set to move in a direction opposite to the first sealing plug 9, so that the oil is normally returned to the cylinder 2.

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. Multistage pneumatic cylinder, including hydraulic stem (1) and cylinder body (2), its characterized in that: the hydraulic rod (1) is movably arranged in the cylinder body (2), a first sealing column (3) and a second sealing column (4) are arranged in the cylinder body (2), the second sealing column (4) is sleeved in the first sealing column (3), a fixing sleeve (5) is fixedly arranged on the left side of the cylinder body (2), the hydraulic rod (1) penetrates through the fixing sleeve (5) and is sleeved in the second sealing column (4), a telescopic sleeve (6) is fixedly arranged at the bottom of the right side of the cylinder body (2), three springs (7) are fixedly arranged in the telescopic sleeve (6), the same telescopic sleeve (6) and the same spring (7) are also fixedly arranged in the first sealing column (3) and the second sealing column (4), meanwhile, two first through holes (8) with the same size are formed in a circle surrounded by the telescopic sleeve (6) in the first sealing column (3), a first sealing plug (9) is arranged in the first sealing column (3), the first sealing plug (9) is composed of a round cake and a cylinder, the first sealing plug (9) is sleeved in the first through hole (8), one side of the round cake of the first sealing plug (9) close to the first sealing column (3) is provided with a blocking spring (10), two telescopic rods (11) are arranged in the blocking spring (10), the two telescopic rods (11) are symmetrically arranged front and back by taking the first sealing plug (9) as a midpoint, the first through hole (8) is symmetrically arranged front and back in the first sealing column (3), the first through hole (8) penetrates through the first sealing column (3), the first sealing plug (9) is sleeved in the two first through holes (8), the two first sealing plugs (9) are respectively arranged on the left side and the right side of the first sealing column (3), the diameter of the cylinder of the first sealing plug (9) is smaller than one centimeter of the diameter of the first through hole (8), and the diameter of the round cake of the first sealing plug (9) is twice of the diameter of the first through hole (8), a second through hole (12) is formed in the position, corresponding to the first sealing column (3), of the second sealing column (4), the size proportion between the second through hole (12) and the second sealing column (4) is the same as the proportion between the first sealing column (3) and the first through hole (8), a second sealing plug (13), a blocking spring (10) and a telescopic rod (11) which are the same as the first sealing column (3) and the first through hole (8) are arranged on the second sealing column (4) and the second through hole (12), and the device proportion on the second sealing column (4) corresponds to the device proportion on the first sealing column (3).

2. The multi-stage hydraulic cylinder of claim 1, wherein: the first sealing column (3) is a cylinder with a through left side, and the outer diameter of the first sealing column (3) is the same as the inner diameter of the cylinder body (2).

3. The multi-stage hydraulic cylinder of claim 1, wherein: the side wall of the telescopic sleeve (6) is of a soft and telescopic structure, the left wall of the telescopic sleeve (6) is of a hard structure, and the telescopic sleeve (6) is of a cuboid shape.

4. The multi-stage hydraulic cylinder of claim 1, wherein: spring (7) equidistance sets up in flexible cover (6), and spring (7) one end and cylinder body (2) inner wall fixed connection, spring (7) other end fixed mounting in flexible cover (6) left wall, and flexible cover (6) are along cylinder body (2) bottom fixed mounting round, and flexible cover (6) leave the circle that the diameter is cylinder body (2) inside diameter third in cylinder body (2) bottom midpoint position.

5. The multi-stage hydraulic cylinder of claim 4, wherein: the size of the circle enclosed by the telescopic sleeve (6) on the first sealing column (3) and the second sealing column (4) corresponds to the diameter of the inner cavity of the first sealing column (3) and the diameter of the inner cavity of the second sealing column (4).

6. The multi-stage hydraulic cylinder of claim 1, wherein: the resistance spring (10) is sleeved on the cylinder of the first sealing plug (9), and the resistance spring (10) is fixedly connected with one side, close to the first sealing column (3).

7. The multi-stage hydraulic cylinder of claim 1, wherein: the telescopic rod (11) is a rod with multiple sections of telescopic types, and two ends of the telescopic rod (11) are fixedly installed on one side, close to the first sealing column (3), of the first sealing column (3) and one side, close to the first sealing column (3), of the first sealing plug (9) round cake respectively.