CN113007172B - Integrated plunger motor type double-power hydraulic cylinder - Google Patents
Integrated plunger motor type double-power hydraulic cylinder Download PDFInfo
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- CN113007172B CN113007172B CN202110267616.5A CN202110267616A CN113007172B CN 113007172 B CN113007172 B CN 113007172B CN 202110267616 A CN202110267616 A CN 202110267616A CN 113007172 B CN113007172 B CN 113007172B
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- oil
- slideway
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- motor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
- F15B15/1452—Piston sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
Abstract
The invention discloses an integrated plunger motor type double-power hydraulic cylinder, which relates to the technical field of hydraulic equipment and comprises a cylinder head, wherein a supporting shaft is arranged in the cylinder head, a plunger motor is sleeved on the supporting shaft and can slide along the axial direction of the supporting shaft, the cylinder head is divided into a first oil cavity and a second oil cavity by the plunger motor, the first oil cavity and the second oil cavity are both communicated with the plunger motor, the plunger motor comprises a plunger structure and a swash plate which are oppositely arranged, and the plunger structure and the swash plate interact to generate tangential torque. The hydraulic cylinder has double power sources, the plunger motor not only serves as a power source, but also serves as a piston, hydraulic oil is introduced into the first oil cavity or the second oil cavity to enable the plunger motor to slide, meanwhile, the hydraulic oil enters the plunger motor, the internal structure of the plunger motor rotates to generate torque to enable the plunger motor to slide, and the plunger motor can provide certain torque during the pushing stroke and the return stroke of the hydraulic cylinder. The invention aims to meet the requirements of output force and use space and provides a hydraulic cylinder with small use volume and high output force.
Description
Technical Field
The invention relates to the technical field of hydraulic equipment, in particular to an integrated plunger motor type double-power hydraulic cylinder.
Background
The traditional hydraulic cylinder comprises a cylinder body, a piston and a piston rod, wherein an oil inlet and an oil outlet are formed in the cylinder body, reciprocating motion of the piston and the piston rod is realized through the flow of oil in a closed space connected with the oil outlet, and the thrust of the hydraulic cylinder is in direct proportion to the effective area. Under certain engineering conditions, the traditional hydraulic cylinder which can improve the working area to meet the output force requirement at a glance can not meet the use requirement due to the output force requirement and the limitation of the practical use space position. For example, the multi-stage oil cylinder is commonly adopted to increase the acting area so as to improve the output force of the hydraulic cylinder, but the size of the multi-stage oil cylinder is not reduced, and the requirement of the using space is not met. In addition, the thin-wall hydraulic cylinder with small size and ultrahigh pressure is also commonly used, the small-sized high-pressure oil cylinder can meet the use requirements of high output force and small size, but the wall of the cylinder body is thin, so that the cylinder body is easy to deform and even break, and further harm is caused.
Disclosure of Invention
The invention aims to provide an integrated plunger motor type double-power hydraulic cylinder, which aims to solve the problems in the prior art, and double powers are provided through oil pressure and a plunger motor, so that the requirements of output force and actual use space position are met.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an integrated plunger motor type double-power hydraulic cylinder which comprises a cylinder head, wherein a supporting shaft is arranged in the cylinder head, a plunger motor is sleeved on the supporting shaft and can slide along the axial direction of the supporting shaft, the cylinder head is divided into a first oil cavity and a second oil cavity by the plunger motor, the first oil cavity and the second oil cavity are both communicated with the plunger motor, the plunger motor comprises a plunger structure and a swash plate which are oppositely arranged, and the plunger structure and the swash plate interact to generate tangential torque.
Preferably, the outside cover of back shaft is equipped with ball, ball can follow the axial slip of back shaft, the plunger motor cover is established ball's the outside, the plunger structure with be provided with the ball between the ball.
Preferably, a gap exists between the inner wall of the ball screw and the outer wall of the supporting shaft, and a first sealing ring and a first guide ring are arranged between the inner wall of the ball screw and the outer wall of the supporting shaft.
Preferably, ball's outside cover is equipped with the slide sleeve, ball's front end with the front end of back shaft all stretches into in the slide sleeve, the back shaft with slide sleeve sliding connection, the rear end of back shaft with the cylinder end fixed connection of cylinder head rear end, the telescopic rear end of slide stretches into the sloping cam plate with between the ball, the telescopic outside of slide is provided with the baffle, the baffle is used for the restriction the position of sloping cam plate, the telescopic front end of slide with the cylinder cap sliding connection of cylinder head front end.
Preferably, the plunger structure comprises an oil distribution disc, a plurality of first through holes are formed in the oil distribution disc, a cylinder body is arranged on the front side of the oil distribution disc, the ball is located between the cylinder body and the ball screw, a plurality of plungers are arranged on the cylinder body along the circumferential direction of the cylinder body, and the front ends of the plungers are embedded into the swash plate.
Preferably, a second sealing ring, a thrust bearing and a plurality of springs are arranged between the cylinder body and the swash plate, the second sealing ring is located on the inner side of the plurality of plungers, the thrust bearing and the plurality of springs are located on the outer sides of the plurality of plungers, the plurality of springs are arranged along the circumferential direction of the swash plate, one end of each spring is abutted against the swash plate, the other end of each spring is abutted against one end of the thrust bearing, and the other end of each thrust bearing is abutted against the cylinder body.
Preferably, the swash plate comprises an upper distribution slideway, a lower distribution slideway and a slideway outer ring, the upper distribution slideway is sleeved on the outer side of the slideway sleeve, the lower distribution slide way is fixedly connected with the rear end of the slide way sleeve, the outer ring of the slide way is positioned at the outer side of the lower distribution slide way, one end of the outer ring of the slide way is contacted with the outer ring of the upper distribution slide way, one side of the lower distribution slide way and one side of the outer ring of the slide way are all wavy surfaces, the wavy surface of the lower distribution slideway and the wavy surface of the outer ring of the slideway are both arranged opposite to the wavy surface of the upper distribution slideway, the upper flow distribution slideway, the lower flow distribution slideway and the outer ring of the slideway form a slideway slot, the front end of the plunger is positioned in the slideway slot, and the upper flow distribution slide way is provided with a plurality of second through holes, and the second through holes are communicated with the second oil cavity.
Preferably, the plunger comprises a plunger body, one end of the plunger body is provided with a plunger head, the plunger head comprises two symmetrical cylindrical wheels, the two wheels rotate around a mounting shaft which is perpendicular to the axial direction of the plunger head, the plunger body is located in the cylinder body, and the plunger head is located in the chute.
Preferably, a hydraulic cylinder sleeve is arranged on the outer sides of the plunger structure and the swash plate, the hydraulic cylinder sleeve is fixedly connected with the swash plate through a mounting pin, and a third sealing ring and a second guide ring are arranged between the hydraulic cylinder sleeve and the cylinder head.
Preferably, the side wall of the cylinder head is provided with a first oil port and a second oil port, the first oil port is communicated with the first oil cavity, and the second oil port is communicated with the second oil cavity.
Compared with the prior art, the invention has the following technical effects:
according to the hydraulic cylinder, hydraulic oil is introduced into the first oil cavity or the second oil cavity to serve as a first power source, the plunger motor serves as a second power source to form double power, the plunger motor serves as a power source and also serves as a piston, the hydraulic oil is introduced into the first oil cavity or the second oil cavity to enable the plunger motor to slide, meanwhile, the hydraulic oil enters the plunger motor, the internal structure of the plunger motor rotates to generate torque to enable the plunger motor to slide, and a certain torque can be provided during the pushing stroke and the returning stroke of the hydraulic cylinder through the ingenious design of the plunger motor. The invention aims to meet the requirements of output force and the limitation of use space under certain engineering conditions, and a hydraulic cylinder with small volume and high output force is required to be used.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of an integrated plunger motor type dual power hydraulic cylinder of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is an exploded view of the plunger construction of the present invention;
FIG. 5 is a schematic view of the swash plate and the chute sleeve of the present invention
FIG. 6 is a schematic view of the swash plate of the present invention;
FIG. 7 is a cross-sectional view B-B of FIG. 6;
FIG. 8 is a schematic view of an upper distribution chute of the present invention;
FIG. 9 is a schematic view of the plunger of the present invention;
FIG. 10 is a schematic view of the oil distribution pan of the present invention;
wherein: 100-integrated plunger motor type double-power hydraulic cylinder, 1-cylinder body, 2-plunger, 3-oil distribution disc, 4-swash plate, 5-ball screw, 6-first oil port, 7-second oil port, 8-first oil chamber, 9-second oil chamber, 10-spring, 11-cylinder bottom, 12-cylinder head, 13-cylinder cover, 14-hydraulic cylinder sleeve, 15-third sealing ring, 16-ball, 17-slideway sleeve, 18-lower flow distribution slideway, 19-upper flow distribution slideway, 20-slideway outer ring, 21-bolt, 22-thrust bearing, 23-mounting pin, 24-support shaft, 25-second sealing ring, 26-first sealing ring, 27-second guide ring, 28-first guide ring, 29-plunger motor, 30-plunger structure, 31-baffle, 32-plunger body, 33-plunger head, 34-wheel, 35-slide groove, 36-first through hole, 37-second through hole, 38-groove.
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 obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide an integrated plunger motor type double-power hydraulic cylinder, which aims to solve the problems in the prior art, and double powers are provided through oil pressure and a plunger motor, so that the requirements of output force and actual use space position are met.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-10: the embodiment provides an integrated plunger motor type double-power hydraulic cylinder 100 which comprises a cylinder head 12, wherein a supporting shaft 24 is arranged in the cylinder head 12, a plunger motor 29 is sleeved on the supporting shaft 24, the plunger motor 29 can slide along the axial direction of the supporting shaft 24, the plunger motor 29 plays a role of a piston, the cylinder head 12 is divided into a first oil cavity 8 and a second oil cavity 9 by the plunger motor 29, the first oil cavity 8 and the second oil cavity 9 are communicated with the plunger motor 29, the plunger motor 29 comprises a plunger structure 30 and a swash plate 4 which are arranged oppositely, and the plunger structure 30 and the swash plate 4 interact to generate tangential torque. In the embodiment, hydraulic oil is introduced into the first oil chamber 8 or the second oil chamber 9 to serve as a first power source, the plunger motor 29 serves as a second power source to form double power, the plunger motor 29 serves as a power source and a piston, hydraulic oil is introduced into the first oil chamber 8 or the second oil chamber 9 to slide the plunger motor 29, meanwhile, the hydraulic oil enters the plunger motor 29, the internal structure of the plunger motor 29 rotates to generate torque to slide the plunger motor 29, and through the ingenious design of the plunger motor 29, certain torque can be provided when the hydraulic cylinder is pushed and returned. The embodiment aims to meet the requirements of certain engineering conditions, and the hydraulic cylinder with small volume and high output force is required to be used due to the limitation of the output force requirement and the use space.
Specifically, in the present embodiment, the ball screw 5 is sleeved on the outer side of the supporting shaft 24, the ball screw 5 can slide along the axial direction of the supporting shaft 24, the plunger motor 29 is sleeved on the outer side of the ball screw 5, and the balls 16, specifically steel balls, are arranged between the plunger structure 30 and the ball screw 5.
In this embodiment, the support shaft 24 is provided with a long key, the long key is located in a long groove of the ball screw 5 to ensure that the ball screw 5 and the support shaft 24 do not rotate, a gap exists between an inner wall of the ball screw 5 and an outer wall of the support shaft 24, the ball screw 5 can slide along the axial direction of the support shaft 24, two first seal rings 26 and two first guide rings 28 are arranged between the inner wall of the ball screw 5 and the outer wall of the support shaft 24, the two first seal rings 26 are respectively located at positions 10mm away from two ends of the ball screw 5, and the first guide rings 28 are located inside the first seal rings 26.
In this embodiment, the outer side cover of ball 5 is equipped with slide sleeve 17, ball 5's front end and back shaft 24's front end all stretch into slide sleeve 17, back shaft 24's front end passes through long key and slide sleeve 17 sliding connection, back shaft 24's rear end and the cylinder end 11 of cylinder head 12 rear end pass through welded fastening and are connected, prevent rotating, slide sleeve 17's rear end stretches into between sloping cam plate 4 and ball 5, slide sleeve 17's the outside is provided with baffle 31, baffle 31 is used for restricting the position of sloping cam plate 4, slide sleeve 17's front end nestification is in the cylinder cap 13 of cylinder head 12 front end and with cylinder cap 13 sliding connection, slide sleeve 17's front end is the solid pole.
In this embodiment, the plunger structure 30 includes an oil distribution disc 3, the oil distribution disc 3 is provided with a plurality of first through holes 36 and a plurality of grooves 38, the grooves 38 are disposed on the inner side of the oil distribution disc 3, the grooves 38 and the first through holes 36 are alternately disposed, the embodiment includes 4 first through holes 36 and grooves 38, the front side of the oil distribution disc 3 is provided with a cylinder body 1, the grooves 38 are the same as the gap between the cylinder body 1 and the cylinder sleeve 14, thereby forming a communicated oil path inside the cylinder sleeve 14, a ball 16 is disposed between the cylinder body 1 and the ball screw 5, the ball 16 forms an internal circulation in the ball screw 5 and the cylinder body 1, the cylinder body 1 can freely rotate on the ball screw 5, the cylinder body 1 is provided with a plurality of plungers 2 along the circumferential direction of the cylinder body 1, the embodiment has 9 plungers 2, each plunger 2 is disposed in a plunger cavity of the cylinder body 1, the front end of the plunger 2 is embedded in a swash plate 4, the first oil cavity 8, The first through hole 36, the plunger chamber, the swash plate 4, and the second oil chamber 9 are all communicated.
In this embodiment, a second sealing ring 25, a thrust bearing 22 and a plurality of springs 10 are arranged between the cylinder block 1 and the swash plate 4, 9 springs 10 are arranged in this embodiment, the second sealing ring 25 is arranged between the cylinder block 1 and the lower distribution slide way 18 and the second sealing ring 25 is arranged on the inner side of the plurality of plungers 2, a stop block is arranged on the lower distribution slide way 18 to support the second sealing ring 25, the thrust bearing 22 and the plurality of springs 10 are arranged on the outer side of the plurality of plungers 2, the plurality of springs 10 are arranged along the circumferential direction of the swash plate 4, one end of the spring 10 abuts against the swash plate 4, the other end of the spring 10 abuts against one end of the thrust bearing 22, and the other end of the thrust bearing 22 abuts against the cylinder block 1. The thrust bearing 22 and the swash plate 4 are pre-stressed by the spring 10, and the cylinder body 1 and the oil distribution disc 3 are tightly matched together under the action of the thrust bearing 22.
In this embodiment, the swash plate 4 is designed as a slide way, the swash plate 4 includes an upper distribution slide way 19, a lower distribution slide way 18 and a slide way outer ring 20, the upper distribution slide way 19 is all sleeved on the outer side of the slide way sleeve 17, the lower distribution slide way 18 is fixedly connected with the rear end of the slide way sleeve 17 through a bolt 21, the slide way outer ring 20 is located on the outer side of the lower distribution slide way 18, one end of the slide way outer ring 20 is in contact with the outer ring of the upper distribution slide way 19, one side of the lower distribution slide way 18 and one side of the slide way outer ring 20 are both wavy surfaces, the wavy surface of the lower distribution slide way 18 and the wavy surface of the slide way outer ring 20 are both arranged opposite to the wavy surface of the upper distribution slide way 19, the lower distribution slide way 18 and the slide way outer ring 20 form a slide way groove 35, the front end of the plunger 2 is located in the slide way groove 35, the upper distribution slide way 19 is provided with a plurality of second through holes 37, in this embodiment includes 6 second through holes 37, the second through hole 37 communicates with the second oil chamber 9.
In this embodiment, the plunger 2 includes a plunger body 32, a plunger head 33 is arranged at one end of the plunger body 32, the plunger head 33 includes two symmetrical cylindrical wheels 34, the two wheels 34 rotate around an installation shaft perpendicular to the axial direction of the plunger head 33, the plunger body 32 is located in the cylinder body 1, and the plunger head 33 is located in the slide groove 35.
In this embodiment, a cylinder sleeve 14 is disposed outside the plunger structure 30 and the swash plate 4, a gap exists between the cylinder sleeve 14 and the cylinder block 1, the cylinder sleeve 14 and the swash plate 4 are fixedly connected by a mounting pin 23, and a third seal ring 15 and a second guide ring 27 are disposed between the cylinder sleeve 14 and the cylinder head 12.
In this embodiment, a first oil port 6 and a second oil port 7 are formed in a side wall of the cylinder head 12, the first oil port 6 is disposed at the cylinder bottom 11, the second oil port 7 is disposed at the cylinder head 13, the first oil port 6 is communicated with the first oil chamber 8, and the second oil port 7 is communicated with the second oil chamber 9.
The working process of the embodiment is as follows: when the plunger motor 29 works as a piston, when hydraulic oil is introduced into the first oil port 6, the first oil chamber 8 is filled with high-pressure hydraulic oil, the plunger motor 29 which can move freely in the axial direction is pushed by the pressure of the hydraulic oil, meanwhile, the high-pressure hydraulic oil enters the plunger chamber of the high-pressure area of the cylinder body 1 through the first through hole 36 of the oil distribution disc 3, an axial acting force is applied to the plunger 2, the wheel 34 of the plunger is in contact with the wavy surface of the upper distribution slideway 19, and because the contact surface of the wavy surface and the plunger wheel 34 is always inclined, the force analysis is carried out on the wheel 34 with the inclination angle smaller than 90 degrees, which can be shown that the direction of the circumferential force generated by the contact surface of each wheel 34 and the swash plate 4 is consistent, so that the plunger motor 29 generates tangential torque, under an ideal state, the normal direction of the side circular surface of the wheel 34 is perpendicular to the tangential direction of the swash plate 4, and the low-pressure hydraulic oil of the plunger motor 29 passes through the inner groove 38 of the oil distribution disc 3, An oil path formed by a gap between the cylinder body 1 and the hydraulic cylinder sleeve 14 and a second through hole 37 of the swash plate 4 is communicated with the second oil chamber 9, specifically, when the first oil chamber 8 is filled with high-pressure oil, the high-pressure oil is communicated with the first through hole 36 to push the plunger 2 to reach the lowest position of the wave surface of the swash plate 4, at the moment, the plunger 2 rotates to the position of the groove 38 in the circumferential direction, the wheel 34 of the plunger ascends on the wave surface relatively, the plunger 2 returns, and the high-pressure oil in the plunger chamber is communicated with the groove 38; the low-pressure oil way is as follows: a channel formed by a groove 38 of the oil distribution disc 3 and the cylinder body 1, a gap formed by the cylinder body 1 and the hydraulic cylinder sleeve 14, a gap between the cylinder body 1 and the slideway outer ring 20, and a circular slideway formed by the slideway outer ring 20 and the lower distribution slideway 18 are finally communicated with a second through hole 37 of the upper distribution slideway 19, and the rotation of the cylinder body 1 on the ball screw 5 further pushes the swash plate 4 to move; when hydraulic oil is fed from the second oil port 7, the swash plate 4 is pushed first to enable the plunger motor 29 to perform piston motion, and simultaneously, the hydraulic oil flows back through the oil path of the low-pressure hydraulic oil, so that the plunger motor 29 rotates in the opposite direction, and the rotation of the cylinder body 1 on the ball screw 5 pushes the cylinder sleeve 14 to drive the plunger motor 29 to perform piston motion.
The double-power hydraulic power generation device is compact and exquisite in structure and ingenious in design, double power of the double-power hydraulic power generation device is generated by converting pure rotary motion provided by hydraulic oil and the plunger motor 29 into thrust generated by axial translation, and the double power increases output force, so that the requirements of the output force and the actual use space position are met. In the embodiment, the hydraulic oil in the cavity of the plunger motor 29 is distributed according to high-low pressure oil paths through the oil distribution disc 3 and the like, so that the hydraulic motor outputs torque when high-pressure hydraulic oil acts, and high-pressure oil in the plunger cavity stopping outputting the torque is discharged when low-pressure hydraulic oil returns, so that the wheels 34 of each plunger 2 generate the same circumferential force.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (5)
1. The utility model provides an integrated plunger motor formula double dynamical pneumatic cylinder which characterized in that: the cylinder head is internally provided with a supporting shaft, a plunger motor is sleeved on the supporting shaft and can slide along the axial direction of the supporting shaft, the cylinder head is divided into a first oil cavity and a second oil cavity by the plunger motor, the first oil cavity and the second oil cavity are both communicated with the plunger motor, the plunger motor comprises a plunger structure and a swash plate which are oppositely arranged, and the plunger structure and the swash plate interact to generate tangential torque;
a ball screw is sleeved on the outer side of the supporting shaft and can slide along the axial direction of the supporting shaft, the plunger motor is sleeved on the outer side of the ball screw, and balls are arranged between the plunger structure and the ball screw;
the outer side of the ball screw is sleeved with a slide way sleeve, the front end of the ball screw and the front end of the supporting shaft both extend into the slide way sleeve, the supporting shaft is connected with the slide way sleeve in a sliding manner, the rear end of the supporting shaft is fixedly connected with the cylinder bottom at the rear end of the cylinder head, the rear end of the slide way sleeve extends into a position between the swash plate and the ball screw, a baffle is arranged on the outer side of the slide way sleeve and used for limiting the position of the swash plate, and the front end of the slide way sleeve is connected with a cylinder cover at the front end of the cylinder head in a sliding manner;
a hydraulic cylinder sleeve is arranged on the outer sides of the plunger piston structure and the swash plate;
the plunger structure comprises an oil distribution disc, wherein a plurality of first through holes and a plurality of grooves are formed in the oil distribution disc, the grooves are formed in the inner side of the oil distribution disc, the grooves and the first through holes are alternately arranged, a cylinder body is arranged on the front side of the oil distribution disc, the grooves are the same as the gaps between the cylinder body and a hydraulic cylinder sleeve, a communicated oil circuit is formed in the hydraulic cylinder sleeve, balls are located between the cylinder body and the ball screws, the balls form internal circulation in the ball screws and the cylinder body, the cylinder body can freely rotate on the ball screws, a plurality of plungers are arranged on the cylinder body along the circumferential direction of the cylinder body, and the front ends of the plungers are embedded into the swash plate;
the swash plate comprises an upper distribution slideway, a lower distribution slideway and a slideway outer ring, the upper distribution slideway is sleeved on the outer side of the slideway sleeve, the lower distribution slide way is fixedly connected with the rear end of the slide way sleeve, the outer ring of the slide way is positioned at the outer side of the lower distribution slide way, one end of the outer ring of the slideway is contacted with the outer ring of the upper distribution slideway, one side of the lower distribution slideway and one side of the outer ring of the slideway are all wavy surfaces, the wavy surface of the lower distribution slideway and the wavy surface of the outer ring of the slideway are both arranged opposite to the wavy surface of the upper distribution slideway, the upper flow distribution slideway, the lower flow distribution slideway and the outer ring of the slideway form a slideway slot, the front end of the plunger is positioned in the slideway slot, a plurality of second through holes are formed in the upper flow distribution slide way, and the second through holes are communicated with the second oil cavity;
the plunger comprises a plunger body, a plunger head is arranged at one end of the plunger body and comprises two symmetrical cylindrical wheels, the two wheels rotate around an installation shaft which is vertical to the axial direction of the plunger head, the plunger body is positioned in the cylinder body, and the plunger head is positioned in the slide way groove.
2. The integrated-plunger-motor-type dual-power hydraulic cylinder according to claim 1, characterized in that: a gap exists between the inner wall of the ball screw and the outer wall of the supporting shaft, and a first sealing ring and a first guide ring are arranged between the inner wall of the ball screw and the outer wall of the supporting shaft.
3. The integrated-plunger-motor-type dual-power hydraulic cylinder according to claim 1, characterized in that: the cylinder body with be provided with second sealing washer, thrust bearing and a plurality of spring between the sloping cam plate, the second sealing washer is located a plurality of the inboard of plunger, thrust bearing and a plurality of the spring all is located a plurality of the outside of plunger, a plurality of the spring is followed the circumference of sloping cam plate sets up, the one end of spring with the sloping cam plate offsets, the other end of spring with thrust bearing's one end offsets, thrust bearing's the other end with the cylinder body offsets.
4. The integrated-plunger-motor-type dual-power hydraulic cylinder according to claim 1, characterized in that: the hydraulic cylinder sleeve is fixedly connected with the swash plate through a mounting pin, and a third sealing ring and a second guide ring are arranged between the hydraulic cylinder sleeve and the cylinder head.
5. The integrated-plunger-motor-type dual-power hydraulic cylinder according to claim 1, characterized in that: the side wall of the cylinder head is provided with a first oil port and a second oil port, the first oil port is communicated with the first oil cavity, and the second oil port is communicated with the second oil cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110267616.5A CN113007172B (en) | 2021-03-12 | 2021-03-12 | Integrated plunger motor type double-power hydraulic cylinder |
| JP2022036996A JP7102046B1 (en) | 2021-03-12 | 2022-03-10 | Integrated plunger motor dual power hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110267616.5A CN113007172B (en) | 2021-03-12 | 2021-03-12 | Integrated plunger motor type double-power hydraulic cylinder |
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Citations (7)
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| GB1003400A (en) * | 1962-03-09 | 1965-09-02 | Parker Hannifin Corp | Improvements in and relating to fluid pressure motors |
| SU710866A1 (en) * | 1978-03-02 | 1980-01-25 | Предприятие П/Я А-1097 | Hydraulic power actuator |
| CN2603871Y (en) * | 2003-02-04 | 2004-02-18 | 张书奇 | Hydraulic automatic reciprocating hydrocylinder |
| JP4918614B1 (en) * | 2010-12-27 | 2012-04-18 | 株式会社ロブテックス | Actuator |
| CN106640514A (en) * | 2016-12-05 | 2017-05-10 | 太原理工大学 | Swash plate type high-pressure plunger motor with spherical surface distribution swash cylinder holes |
| CN208518997U (en) * | 2018-05-10 | 2019-02-19 | 四川大学 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
| CN111794898A (en) * | 2020-08-06 | 2020-10-20 | 山河智能装备股份有限公司 | Hydraulic power device with double oil inlet and outlet ports |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2597114B2 (en) * | 1987-11-21 | 1997-04-02 | 株式会社ナブコ | Hydraulic booster |
| FR2932539B1 (en) * | 2008-06-17 | 2010-07-30 | Messier Dowty Sa | ELECTROHYDRAULIC ACTUATOR WITH INTEGRATED PUMP IN THE PISTON |
| CN110035933B (en) * | 2016-12-26 | 2021-09-03 | 日立安斯泰莫株式会社 | Electric booster |
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2021
- 2021-03-12 CN CN202110267616.5A patent/CN113007172B/en active Active
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- 2022-03-10 JP JP2022036996A patent/JP7102046B1/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1003400A (en) * | 1962-03-09 | 1965-09-02 | Parker Hannifin Corp | Improvements in and relating to fluid pressure motors |
| SU710866A1 (en) * | 1978-03-02 | 1980-01-25 | Предприятие П/Я А-1097 | Hydraulic power actuator |
| CN2603871Y (en) * | 2003-02-04 | 2004-02-18 | 张书奇 | Hydraulic automatic reciprocating hydrocylinder |
| JP4918614B1 (en) * | 2010-12-27 | 2012-04-18 | 株式会社ロブテックス | Actuator |
| CN106640514A (en) * | 2016-12-05 | 2017-05-10 | 太原理工大学 | Swash plate type high-pressure plunger motor with spherical surface distribution swash cylinder holes |
| CN208518997U (en) * | 2018-05-10 | 2019-02-19 | 四川大学 | A kind of external friction mechanical self-locking hydraulic cylinder based on ball-screw |
| CN111794898A (en) * | 2020-08-06 | 2020-10-20 | 山河智能装备股份有限公司 | Hydraulic power device with double oil inlet and outlet ports |
Also Published As
| Publication number | Publication date |
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| CN113007172A (en) | 2021-06-22 |
| JP2022140395A (en) | 2022-09-26 |
| JP7102046B1 (en) | 2022-07-19 |
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