CN118088520B - Bidirectional double-stroke hydraulic device - Google Patents
Bidirectional double-stroke hydraulic device Download PDFInfo
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- CN118088520B CN118088520B CN202410464887.3A CN202410464887A CN118088520B CN 118088520 B CN118088520 B CN 118088520B CN 202410464887 A CN202410464887 A CN 202410464887A CN 118088520 B CN118088520 B CN 118088520B
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- 230000002457 bidirectional effect Effects 0.000 title abstract description 7
- 230000007246 mechanism Effects 0.000 claims abstract description 52
- 230000006835 compression Effects 0.000 claims description 27
- 238000007906 compression Methods 0.000 claims description 27
- 238000007789 sealing Methods 0.000 claims description 18
- 230000007423 decrease Effects 0.000 claims description 3
- 208000002991 Ring chromosome 4 syndrome Diseases 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 230000008569 process Effects 0.000 description 14
- 230000009471 action Effects 0.000 description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 4
- 230000004308 accommodation Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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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
- F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
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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
- F15B15/1447—Pistons; Piston to piston rod assemblies
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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
- F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
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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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Actuator (AREA)
Abstract
The invention discloses a bidirectional double-stroke hydraulic device, which comprises a shell body and a telescopic mechanism, wherein a cavity, a first pipeline and a second pipeline which are communicated with the cavity are arranged in the shell body; the tensioning ring is sleeved on the outer wall of one end, close to the second telescopic shaft, of the first telescopic shaft, the inner wall of the tensioning ring is abutted with the outer wall of the first telescopic shaft, and the outer wall of the tensioning ring is abutted with the inner wall of the second telescopic shaft; the first pipeline is used for introducing a medium into the cavity, so that the first telescopic shaft and the second telescopic shaft are mutually far away at the same time, and the telescopic mechanism is converted from a retracted state to an extended state; the second pipeline is used for introducing media into the cavity, so that the first telescopic shaft and the second telescopic shaft are mutually close at the same time, and the telescopic mechanism is converted from an extended state to a retracted state. The hydraulic device can amplify the output tension of the telescopic mechanism and ensure the running stability, so that the hydraulic device can meet the working occasion with higher load requirement.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a bidirectional double-stroke hydraulic device.
Background
At present, in the structures of various known hydraulic mechanisms, the strokes of the hydraulic cylinders are single-stroke and double-stroke in one direction; the pulling force of the hydraulic cylinder is only determined by the cylinder diameter and the pressure, and the hydraulic cylinder is unstable in operation when being stressed radially, so that the working occasion with higher load requirement can not be met.
Disclosure of Invention
In view of the above, in order to overcome the defects of the prior art, the present invention aims to provide a bidirectional double-stroke hydraulic device, which can amplify the output tension of the hydraulic device and ensure the running stability thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides a two-way double-stroke hydraulic means, includes shell body and telescopic machanism, first pipeline, second pipeline and cavity have been seted up in the shell body, first pipeline and second pipeline all with the cavity intercommunication, telescopic machanism includes tension ring, first telescopic shaft and second telescopic shaft, the cavity is used for holding tension ring, first telescopic shaft is close to the tip of second telescopic shaft and the second telescopic shaft is close to the tip of first telescopic shaft, the axial lead of tension ring, the axial lead of first telescopic shaft and the axial lead coincidence of second telescopic shaft; the tensioning ring is sleeved on the outer wall of one end, close to the second telescopic shaft, of the first telescopic shaft, the inner wall of the tensioning ring is abutted with the outer wall of the first telescopic shaft, and the outer wall of the tensioning ring is abutted with the inner wall of the second telescopic shaft;
The telescopic mechanism is provided with an extending state and a retracting state, the first pipeline is used for introducing media into the cavity, so that the first telescopic shaft and the second telescopic shaft move in directions away from each other at the same time, and the telescopic mechanism is changed from the retracting state to the extending state; and the second pipeline is used for introducing media into the cavity, so that the first telescopic shaft and the second telescopic shaft move towards the directions close to each other at the same time, and the telescopic mechanism is changed from the extending state to the retracting state. The moving directions of the first telescopic shaft and the second telescopic shaft are parallel to the length direction of the cavity.
The first telescopic shaft and the second telescopic shaft are controlled to retract or extend simultaneously by adding media into the first pipeline and the second pipeline, and the first telescopic shaft and the second telescopic shaft act in opposite directions simultaneously; the structure in the shell body and the telescopic mechanism are matched with each other to amplify the output tension of the hydraulic device, so that the hydraulic device can meet the working occasion with higher load requirement. The output tension of the first telescopic shaft is less than or equal to 100kN.
According to some preferred embodiments of the invention, the cavity comprises a first cavity, a second cavity and a third cavity, the first cavity is communicated with the first pipeline, and the third cavity is communicated with the second pipeline; the second cavity is formed by encircling the tensioning ring, the end part of the first telescopic shaft, which is close to the second telescopic shaft, and the end part of the second telescopic shaft, which is close to the first telescopic shaft; the tensioning ring comprises a plurality of tensioning blocks which are uniformly arranged at intervals, and gaps are reserved between every two adjacent tensioning blocks; when the telescoping mechanism transitions between the retracted and extended states, the medium is circulated between the first and second chambers through a gap between adjacent ones of the tensioning blocks. Specifically, when the telescopic mechanism is changed from a retracted state to an extended state, a medium enters the first cavity from the first pipeline and enters the second cavity through a gap between adjacent tensioning blocks, and the volumes of the first cavity and the second cavity in the process are continuously increased; when the telescopic mechanism is converted from the extending state to the retracting state, media in the second cavity can enter the first cavity through gaps between adjacent tensioning blocks and then flow out of the first pipeline, and the volumes of the first cavity and the second cavity in the process are continuously reduced. In some embodiments of the invention, the gap between adjacent tensioning blocks of the tensioning ring is 2-4.2 mm, whether the tensioning ring is contracted or expanded, medium circulation between the first cavity and the second cavity can be ensured, telescopic clamping is prevented, and smooth action of the telescopic mechanism is ensured.
According to some preferred embodiments of the present invention, the first telescopic shaft includes a compression bar, an outer wall of the compression bar near one end of the second telescopic shaft is provided with a first conical surface, and a diameter of the first conical surface gradually increases from one end far from the second telescopic shaft to the other end; the inner wall of the tensioning ring is provided with a second conical surface, and the first conical surface is matched with the second conical surface. In some embodiments of the present invention, the included angle between the first conical surface and the end surface of the compression rod, which is close to the second telescopic shaft, is 45-60 °, preferably 55 °.
According to some preferred embodiments of the present invention, the second telescopic shaft includes a fixed seat, a first accommodating cavity is formed in the fixed seat, when the telescopic mechanism is in the extended state, an end of the compression rod, which is close to the second telescopic shaft, and an end of the tension ring, which is close to the fixed seat, are accommodated in the first accommodating cavity, and when the telescopic mechanism is in the retracted state, an end of the compression rod, which is close to the second telescopic shaft, and the tension ring are accommodated in the first accommodating cavity; the inner wall of the fixed seat is provided with a third conical surface, and the diameter of the third conical surface gradually decreases from one end close to the first telescopic shaft to the other end; the outer wall of the tensioning ring is provided with an arc-shaped surface, and the third conical surface is matched with the arc-shaped surface. The diameter of the third conical surface is gradually reduced from one end close to the first telescopic shaft to the other end, namely, the diameter of the first accommodating cavity is gradually reduced from one end close to the first telescopic shaft to the other end, and the design is used for matching with the tensioning ring, so that the tensioning ring can be contracted or expanded in the first accommodating cavity under the driving action of a medium, and the second telescopic shaft can move in the cavity of the shell body. In some embodiments of the present invention, the acute included angle between the inner wall of the third conical surface and the outer wall of the third conical surface of the fixing seat is 5 ° to 10 °, preferably 6 °.
According to the invention, the first telescopic shaft and the second telescopic shaft are matched through the tensioning ring, and the first telescopic shaft and the second telescopic shaft are driven to simultaneously complete reverse stretching or shrinking actions by means of the contraction or expansion of the tensioning ring and medium passing through the first pipeline and the second pipeline. The operation of the telescopic mechanism is driven through hydraulic control, so that the operation precision of the hydraulic device is improved, and the hydraulic device is still stable during high-load operation; the capacity of the telescopic mechanism for outputting larger pulling force is realized by utilizing low-pressure control, so that the functions and the application range of the hydraulic device are expanded.
According to some preferred embodiments of the present invention, the first telescopic shaft further includes a pull rod fixedly connected to the compression rod, the pull rod includes a first portion, a connecting portion, and a second portion, two ends of the connecting portion are fixedly connected to one end of the first portion and one end of the second portion, respectively, and an outer diameter of the connecting portion gradually increases from one end close to the first portion to the other end; the compression bar comprises a third part, a stop ring and a fourth part, one end of the third part is fixedly connected with one end of the fourth part, the stop ring is fixedly sleeved on the outer wall of the third part, which is close to one end of the fourth part, the inner wall of the tensioning ring is in butt joint with the outer wall of the fourth part, and the end face, which is close to the second part, of the stop ring is in butt joint with the end face of the second part. In some embodiments of the present invention, the first telescopic shaft is provided with a separate compression bar and tension bar, which can be installed conveniently. The outer wall of the fourth part of the compression bar is set to be a first conical surface.
According to some preferred embodiments of the present invention, a second accommodating cavity for accommodating the third portion is formed inside the second portion, the outer diameter of the stop ring is larger than the diameter of the second accommodating cavity and smaller than or equal to the outer diameter of the second portion, and the outer diameter of the stop ring is larger than the outer diameter of the end, close to the third portion, of the fourth portion. The second part of the pull rod is fixedly connected with the third part of the compression rod, in some embodiments of the invention, the inner wall of the second part is provided with internal threads, the outer wall of the third part is provided with external threads, and when the third part is accommodated in the second accommodating cavity of the second part, the second part and the third part are in threaded connection; in addition, a locking jackscrew is further arranged between the second part and the third part and used for preventing loosening between the pull rod and the compression rod. The setting of stopping ring is used for carrying out spacingly to the position of pull rod behind fixed connection between depression bar and the pull rod, further prevents that the pull rod from continuing inwards moving behind pull rod and the depression bar fixed connection.
According to some preferred embodiments of the invention, the outer diameter of the fourth portion gradually increases from one end near the stopper ring to the other end, and the outer diameter of the fourth portion near the end of the second telescopic shaft is smaller than the diameter of the first accommodation chamber at the end far from the first telescopic shaft; one end of the fourth part, which is far away from the stop ring, is provided with a first chamfer. The arrangement of the first chamfer can avoid the interference of the fourth part with the bottom of the first accommodating cavity of the fixing seat when the fourth part is arranged at the bottom of the first accommodating cavity; and the damage to workers in the processing and mounting processes of the compression bar can be prevented.
According to some preferred embodiments of the invention, the holder is located in the cavity, the diameter of the cavity is equal to the outer diameter of the holder, the depth of the cavity is greater than the length of the holder, and the depth of the first receiving cavity is less than the length of the holder; the fixing base is far away from the one end of first telescopic shaft is provided with the second chamfer, first holding chamber is far away from the one end of first telescopic shaft is provided with the third chamfer. The depth of setting up the cavity is greater than the length of fixing base, is in order to guarantee under the driving action of medium that the fixing base can take place to remove in the cavity to make the second telescopic shaft also can take place to remove. In some embodiments of the present invention, the first chamfer and the third chamfer are rounded, and the arrangement of the first chamfer in combination with the third chamfer is beneficial to further avoiding interference between the fourth portion when the fourth portion gradually approaches the bottom of the first accommodating cavity of the fixing seat.
According to some preferred embodiments of the invention, a fourth chamfer is provided at an end of the cavity remote from the first telescopic shaft, a buffer is formed between the second chamfer and the fourth chamfer when the telescopic mechanism is in the extended state, and the second pipeline is communicated with the buffer. In some embodiments of the present invention, the second chamfer is a chamfer, the fourth chamfer is a chamfer, and a buffer area is formed between the second chamfer and the fourth chamfer, so that when the telescopic mechanism is in an extended state, the medium can enter the buffer area when the medium is introduced from the second pipeline, and thereby the fixing seat is pushed to move in a direction close to the first telescopic shaft, that is, the buffer area can prevent operation from being blocked.
According to some preferred embodiments of the present invention, the sealing base is fixedly connected to the housing body, the sealing base sequentially includes a first base, a second base and a third base, which are fixedly connected, the outer diameter of the first base is larger than the outer diameter of the second base, the outer diameter of the second base is larger than the outer diameter of the third base and is equal to the diameter of the cavity, axial leads of the first base, the second base and the third base are coincident, one end of the first base is flush with one end of the housing body, which is close to the first telescopic shaft, and an end face of the third base, which is far away from the second base, is abutted to an end face of the tensioning ring, which is close to the compression rod. The third pedestal is always abutted with the tensioning ring, and the outer wall of the tensioning ring is always abutted with the inner wall of the fixed seat, so that the tensioning ring can be ensured not to move left and right in the horizontal direction when the telescopic mechanism stretches.
According to some preferred embodiments of the present invention, the second telescopic shaft further includes an extension shaft fixedly connected to an end of the fixing base remote from the first telescopic shaft; the shell body is further provided with a first through hole and a second through hole, the first through hole and the second through hole are communicated with the cavity, the first seat body is located in the first through hole, the second seat body and the third seat body are located in the cavity, the diameter of the first through hole is equal to the outer diameter of the first seat body, the diameter of the second through hole is equal to the outer diameter of the extension shaft and smaller than the diameter of the cavity, and the depth of the second through hole is smaller than the length of the extension shaft. The setting of the external diameter of seal base's first pedestal, second pedestal and third pedestal combines the setting of the diameter of first perforation and cavity, can guarantee seal base at the internal fixation joint of shell, can not take place to rock between seal base and the shell body.
According to some preferred embodiments of the invention, a third receiving cavity is formed in the sealing base, the diameter of the third receiving cavity is equal to the outer diameter of the second portion, the depth of the third receiving cavity is greater than the length of the second portion, and the second portion is located in the third receiving cavity. In some embodiments of the present invention, the first telescopic shaft may slide in the third accommodating cavity of the sealing base, specifically, the second portion of the first telescopic shaft is always located in the third accommodating cavity, and the diameter of the third accommodating cavity is set to be equal to the outer diameter of the second portion, so as to ensure that the whole first telescopic shaft cannot shake or tilt relative to the sealing base. The depth that sets up the third and hold the chamber is greater than the length of second portion, guarantees that the second portion has the space that removes in the third holds the chamber to make first telescopic shaft can take place to stretch out and draw back.
According to some preferred embodiments of the invention, the first pipeline comprises a first branch and a second branch which are communicated, the first branch is parallel to the depth direction of the cavity, the first branch is perpendicular to the second branch, and the second branch is communicated with the first cavity.
In the invention, when the telescopic mechanism is in an extending state, one end of the fixed seat, which is close to the extension shaft, is abutted with one end of the cavity, which is close to the second through hole, and the end of the tensioning ring, which is close to the second telescopic shaft, is positioned in the first accommodating cavity; when the telescopic mechanism is in a retracted state, the third seat body, the tensioning ring, the fourth part and the end part of the third part, which is close to the fourth part, are all positioned in the first accommodating cavity.
Compared with the prior art, the invention has the following advantages: according to the bidirectional double-stroke hydraulic device, through the structural arrangement of the telescopic mechanism and the shell body and the mutual coordination among the structures, the first telescopic shaft and the second telescopic shaft can be controlled to retract or extend simultaneously by adding the medium into the first pipeline and the second pipeline, namely, the first telescopic shaft and the second telescopic shaft can extend or retract simultaneously in double-stroke motions, and the first telescopic shaft and the second telescopic shaft can move (bidirectionally) in opposite directions simultaneously, so that the output tension of the hydraulic device is amplified and the running stability of the hydraulic device is ensured, the hydraulic device can meet the working occasion with higher load requirements, the application range of the hydraulic device is enlarged, and the working efficiency of the hydraulic device is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic perspective view of a hydraulic device according to a preferred embodiment of the present invention;
FIG. 2 is an exploded view of a hydraulic device in a preferred embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of the hydraulic device with the telescoping mechanism in an extended state in accordance with the preferred embodiment of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the hydraulic device with the telescoping mechanism in a retracted state in accordance with the preferred embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a housing body in a preferred embodiment of the invention;
wherein, the reference numerals are as follows:
The anti-loosening device comprises a shell body-1, a first through hole-11, a cavity-12, a first cavity-121, a second cavity-122, a third cavity-123, a fourth chamfer-R4, a second through hole-13, a first pipeline-14, a first branch-141, a second branch-142, a second pipeline-15, a first telescopic shaft-2, a pull rod-21, a first part-211, a connecting part-212, a second part-213, a second containing cavity-2131, a compression rod-22, a third part-221, a stop ring-222, a fourth part-223, a first conical surface-2231, a first chamfer-R1, a second telescopic shaft-3, a fixed seat-31, a first containing cavity-311, a third conical surface-312, a second chamfer-R2, a third chamfer-R3, an extension shaft-32, a tightening ring-4, a tightening block-41, a second conical surface-42, an arc surface-43, a first plane-44, a sealing base-5, a third containing cavity-51, a third containing cavity-52, a second conical surface-2231, a first conical surface-541, a second conical surface-3, a sealing base-52, a third conical surface-54, a top surface-541, a buffer component-8, a top surface-541.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1 to 6, the bidirectional double-stroke hydraulic device comprises a shell body 1, a telescopic mechanism and a sealing base 5, wherein all components are processed by adopting high-strength alloy so as to ensure high-precision mutual matching among all structures and be beneficial to improving the operation stability of the hydraulic device.
Further, as shown in fig. 6, the first pipeline 14, the second pipeline 15 and the cavity 12 are formed in the shell body 1 through finish machining, the first pipeline 14 and the second pipeline 15 are communicated with the cavity 12, and the telescopic mechanism can slide along the depth direction of the cavity 12. The first conduit 14 and the second conduit 15 are both used for introducing medium into the cavity 12, so as to ensure that the extension and retraction of the telescopic mechanism are controlled under the driving action of the medium.
The shell body 1 is also provided with a first through hole 11 and a second through hole 13, the first through hole 11 and the second through hole 13 are communicated with the cavity 12, the diameter of the first through hole 11 is larger than that of the cavity 12, and the diameter of the cavity 12 is larger than that of the second through hole 13. The axes of the first through hole 11, the cavity 12 and the second through hole 13 are coincident with each other, and also coincident with the axis of the case body 1. A fourth chamfer R4 is disposed at one end of the cavity 12 near the second through hole 13, and the fourth chamfer R4 in this embodiment is a round corner. In addition, the first pipeline 14 comprises a first branch 141 and a second branch 142 which are communicated, the first branch 141 is parallel to the depth direction of the cavity 12, the first branch 141 is perpendicular to the second branch 142, and one end of the first branch 141, which is far away from the second branch 142, penetrates through the outer wall of one side of the shell body 1, so that a medium can be conveniently introduced from one end of the first branch 141; one end of the second branch 142 far away from the cavity 12 also passes through the outer wall of the other side of the shell body 1, and a plug 8 is arranged at one end of the second branch 142 to prevent medium leakage; one end of the second pipeline 15 far away from the cavity 12 penetrates through the outer wall of one side of the shell body 1, so that a medium can be conveniently introduced from one end of the second pipeline 15. In this embodiment, one end of the first branch 141 and one end of the second pipeline 15 are located in the same vertical direction.
Further, the telescopic mechanism of the present invention has an extended state and a retracted state, as shown in fig. 1 to 5, the telescopic mechanism includes a first telescopic shaft 2, a second telescopic shaft 3 and a tension ring 4, and the axis of the first telescopic shaft 2 coincides with the axis of the second telescopic shaft 3 and the axis of the tension ring 4, and also coincides with the axis of the housing body 1. The first telescopic shaft 2 and the second telescopic shaft 3 are mutually matched through the tensioning ring 4, and medium is introduced into the cavity 12 through the first pipeline 14, so that the first telescopic shaft 2 and the second telescopic shaft 3 move in the direction away from each other at the same time, and the telescopic mechanism can be converted from a retracted state to an extended state; the second pipeline 15 is used for introducing media into the cavity 12, so that the first telescopic shaft 2 and the second telescopic shaft 3 can move towards each other at the same time, and the telescopic mechanism can be changed from an extended state to a retracted state. In the process of simultaneously extending or contracting the first telescopic shaft 2 and the second telescopic shaft 3, the moving directions of the first telescopic shaft 2 and the second telescopic shaft 3 are parallel to the depth direction of the cavity 12.
Specifically, as shown in fig. 2 to 5, the first telescopic shaft 2 includes a fixedly connected pull rod 21 and a compression rod 22, wherein the pull rod 21 includes a first portion 211, a connecting portion 212 and a second portion 213, and a second accommodating cavity 2131 is formed in the second portion 213. The two ends of the connecting portion 212 are fixedly connected with one end of the first portion 211 and one end of the second portion 213 respectively, and the outer diameter of the connecting portion 212 gradually increases from one end close to the first portion 211 to the other end, so that the first telescopic shaft 2 can be conveniently transited from the first portion 211 to the second portion 213 when passing through the end of the first through hole 11 in the extending process, or transited from the second portion 213 to the first portion 211 when passing through the end of the first through hole 11 in the retracting process, and the moving smoothness of the first telescopic shaft 2 is ensured.
The compression bar 22 comprises a third part 221, a stop ring 222 and a fourth part 223, one end of the third part 221 is fixedly connected with one end of the fourth part 223, the stop ring 222 is fixedly sleeved on the outer wall of one end, close to the fourth part 223, of the third part 221, and one side, close to the second part 213, of the stop ring 222 is abutted with the end face, far from the first part 211, of the second part 213; the second accommodation chamber 2131 of the second portion 213 is for accommodating the third portion 221. In this embodiment, the inner wall of the second portion 213 of the pull rod 21 is provided with an internal thread, the outer wall of the third portion 221 of the compression rod 22 is provided with an external thread, and when the third portion 221 is accommodated in the second accommodating cavity 2131 of the second portion 213, the two are in threaded connection. A locking jackscrew 7 is also arranged between the second part 213 and the third part 221, so as to prevent looseness between the pull rod 21 and the compression rod 22. In addition, the outer diameter of the stop ring 222 is greater than the outer diameter of the third portion 221 and greater than the outer diameter of the end, close to the third portion 221, of the fourth portion 223, the outer diameter of the stop ring 222 is also greater than the diameter of the second accommodating cavity 2131 and less than or equal to the outer diameter of the second portion 213, and by combining the setting of the locking jackscrew 7 and the stop ring 222, the position of the pull rod 21 after being fixedly connected between the compression rod 22 and the pull rod 21 can be limited, and further the pull rod 21 is prevented from continuously moving inwards after being fixedly connected with the compression rod 22.
As shown in fig. 3 and 5, the end of the fourth portion 223 away from the stop ring 222 is provided with a first chamfer R1, and the first chamfer R1 in this embodiment is a rounded corner, so that injury to workers during processing and installation of the first telescopic shaft 2 can be prevented. The tensioning ring 4 is sleeved on the outer wall of the fourth portion 223, and the inner wall of the tensioning ring 4 is abutted against the outer wall of the fourth portion 223, wherein the outer wall of the fourth portion 223 is set to be a first conical surface 2231, and an included angle between the first conical surface 2231 and the end face, close to the second telescopic shaft 3, of the compression rod 22 in the embodiment is preferably 55 degrees. The diameter of the first tapered surface 2231 (i.e., the outer diameter of the fourth portion 223) gradually increases from one end away from the second telescopic shaft 3 to the other end; the inner wall of the tension ring 4 is provided with a second conical surface 42, and the first conical surface 2231 is matched with the second conical surface 42. As shown in fig. 2, the tension ring 4 of the embodiment includes a plurality of tension blocks 41 that are uniformly spaced, and the gaps between adjacent tension blocks 41 are 2-4.2 mm, so that the tension ring 4 can be contracted or expanded under the action of external force, and the inner diameter of the tension ring is gradually changed, so that the mutual abutting with the outer wall of the fourth portion 223 is ensured.
Further, the second telescopic shaft 3 includes a fixed seat 31 and an extension shaft 32 fixedly connected, the fixed seat 31 is located in the cavity 12 of the shell body 1, the axial lead of the fixed seat 31 coincides with the axial lead of the extension shaft 32, a first accommodating cavity 311 is formed in the fixed seat 31, the first accommodating cavity 311 is formed from one end of the fixed seat 31 close to the first telescopic shaft 2 to the other end, and the depth of the first accommodating cavity 311 is smaller than the length of the fixed seat 31; the outer wall of the tensioning ring 4 is always abutted with the inner wall of the fixing seat 31. Specifically, the inner wall of the fixing seat 31 is set to be a third conical surface 312, in this embodiment, the acute included angle between the inner wall of the fixing seat 31 set to be the third conical surface 312 and the outer wall thereof is preferably 6 °, and the diameter of the third conical surface 312 (i.e. the diameter of the first accommodating cavity 311) gradually decreases from one end close to the first telescopic shaft 2 to the other end; the outer wall of the tensioning ring 4 is provided with an arc-shaped surface 43, and the third conical surface 312 is matched with the arc-shaped surface 43.
Specifically, as shown in fig. 3 and 5, the chamber 12 includes a first chamber 121, a second chamber 122, and a third chamber 123, the first chamber 121 communicates with the first pipe 14, and the third chamber 123 communicates with the second pipe 15. The second cavity 122 is formed by enclosing the end of the tensioning ring 4, the end of the fourth part 223, which is close to the second telescopic shaft 3, and the inner wall of the fixed seat 31. When the telescopic mechanism is converted from a retracted state to an extended state, a medium enters the first cavity 121 from the first pipeline 14 and enters the second cavity 122 through a gap between adjacent tensioning blocks 41, and the volumes of the first cavity 121 and the second cavity 122 in the process are continuously increased; when the telescopic mechanism is changed from the extended state to the retracted state, the medium in the second cavity 122 enters the first cavity 121 through the gap between the adjacent tensioning blocks 41 and flows out of the first pipeline 14, and the volumes of the first cavity 121 and the second cavity 122 in the process are continuously reduced.
The outer diameter of the fixing seat 31 is equal to the diameter of the cavity 12, so that the whole second telescopic shaft 3 can be ensured not to shake or incline relative to the shell body 1 in the telescopic process. And the length of fixing base 31 is less than the degree of depth of cavity 12 to guarantee that under the drive effect of medium, fixing base 31 can take place to remove in cavity 12, thereby makes second telescopic shaft 3 also can take place to remove. The fixing seat 31 is provided with the second chamfer R2 near the one end of extension axle 32, and the first one that holds the chamber 311 is provided with the third chamfer R3 near the one end of extension axle 32 still, and in this embodiment, the second chamfer R2 is the right angle, and the third chamfer R3 is the fillet, when telescopic machanism is in the state of stretching out, forms buffer 9 between fourth chamfer R4 and the second chamfer R2, as shown in FIG. 3 to prevent the telescopic machanism card when moving. The engagement between the third chamfer R3 and the first chamfer R1 is advantageous in avoiding interference between the fourth portion 223 of the pressing lever 22 when it gradually approaches the bottom of the first receiving cavity 311. The depth of the second through hole 13 is smaller than the length of the extension shaft 32, and the diameter of the second through hole 13 is equal to the outer diameter of the extension shaft 32 and smaller than the diameter of the cavity 12, so that the second telescopic shaft 3 can be restrained from moving when the telescopic mechanism reaches the extended state.
Further, as shown in fig. 2 to 5, the sealing base 5 includes, in order from one end near the first through hole 11 to the other end, a first base 52, a second base 53, and a third base 54 that are fixedly connected, and axial lines of the first base 52, the second base 53, and the third base 54 overlap. As shown in fig. 4, the end surface of the third seat 54, which is close to the tension ring 4 and the tension ring 4 is close to the compression rod 22, is a first plane 44, the end surface of the third seat 54, which is far from the second seat 53, is a second plane 541, and the first plane 44 abuts against the second plane 541.
The first seat 52 is located in the first through hole 11, and one end of the first seat 52 away from the second seat 53 is flush with one end of the shell body 1 away from the second through hole 13; the second seat 53 and the third seat 54 are both located in the cavity 12. The outer diameter of the first housing 52 is larger than the outer diameter of the second housing 53, and the outer diameter of the second housing 53 is larger than the outer diameter of the third housing 54. The external diameter of the first seat 52 equals to the diameter of the first through hole 11, the external diameter of the second seat 53 equals to the diameter of the cavity 12, and the external diameter of the third seat 54 is smaller than the diameter of the cavity 12, so that the sealing base 5 is fixedly clamped in the shell body 1, and the sealing base 5 cannot shake relative to the shell body 1.
The sealing base 5 is further provided with a third accommodating cavity 51 inside, the second portion 213 is located in the third accommodating cavity 51, and the diameter of the third accommodating cavity 51 is equal to the outer diameter of the second portion 213, so that the whole first telescopic shaft 2 cannot shake or incline relative to the sealing base 5. The depth of the third accommodating chamber 51 is further set to be greater than the length of the second portion 213, ensuring that the second portion 213 has a space to move in the third accommodating chamber 51, so that the first telescopic shaft 2 can slide in the third accommodating chamber 51 of the sealing base 5.
In this embodiment, as shown in fig. 3 and 5, the sealing assembly 6 is disposed between the outer wall of the second seat 53 of the sealing base 5 and the inner wall of the housing body 1, between the inner wall of the sealing base 5 and the outer wall of the second portion 213 of the compression rod 22, between the outer wall of the fixing seat 31 and the inner wall of the housing body 1, and between the outer wall of the extension shaft 32 and the inner wall of the housing body 1, so as to prevent leakage medium of the hydraulic device and avoid affecting normal operation of the hydraulic device. The medium of this embodiment is hydraulic oil.
The working principle of the hydraulic device in this embodiment is briefly described below:
When the telescopic mechanism is in the retracted state, a medium is introduced from the opening of the first branch 141 of the first pipeline 14, enters the second branch 142 from the first branch 141 and then enters the first cavity 121, flows into the second cavity 122 through the gap between the adjacent tensioning blocks 41, pushes the first telescopic shaft 2 and the second telescopic shaft 3 to two sides respectively, and in the process, the tensioning ring 4 is continuously expanded. When the second telescopic shaft 3 is pushed to the end of the fixed seat 31 and the end of the cavity 12 close to the second through hole 13 are abutted, the movement is stopped, at this time, since the third seat 54 is always abutted against one end of the tension ring 4, the outer wall of the tension ring 4 is abutted against the inner wall of the fixed seat 31 again, so that the tension ring 4 cannot be continuously expanded, the first telescopic shaft 2 also stops extending, as shown in fig. 3, and the telescopic mechanism reaches the extending state.
When the telescopic mechanism is in an extending state, a medium is introduced from the opening of the second pipeline 15, the medium enters the buffer zone 9 from the second pipeline 15 and then enters the third cavity 123, the medium can push the fixing seat 31 of the second telescopic shaft 3 to move towards the direction close to the first telescopic shaft 2, in the moving process, the first accommodating cavity 311 of the fixing seat 31 can gradually wrap the tensioning ring 4, the tensioning ring 4 can be continuously contracted in the process, the first telescopic shaft 2 can be driven to move towards the direction close to the second telescopic shaft 3 by the contraction of the tensioning ring 4, and the first cavity 121 can be continuously compressed in the moving process of the first telescopic shaft 2 and the second telescopic shaft 3, so that the medium in the first cavity 121 flows back from the second branch 142 and the first branch 141. In the actual working process, it is necessary to ensure that the first cavity 121 can be communicated with the first pipeline 14, but the fixing seat 31 cannot block the second branch 142, so that the telescopic mechanism stops working in the state shown in fig. 5, and the telescopic mechanism is in the retracted state, and at this time, the third seat 54, the tensioning ring 4, the fourth portion 223 and part of the third portion 221 are all located in the first accommodating cavity 311 of the fixing seat 31. In this state, the tensile force and the radial load strength of the first telescopic shaft 2 are both stronger than those of the second telescopic shaft 3 with respect to the second telescopic shaft 3.
According to the invention, the operation of the telescopic mechanism is controlled by the driving of the medium, so that the operation precision of the hydraulic device is improved, and the hydraulic device is still stable in high-load operation; the capacity of the telescopic mechanism for outputting larger pulling force is realized by utilizing low-pressure control, so that the functions and the application range of the hydraulic device are expanded.
The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. A bi-directional double-stroke hydraulic device, characterized in that: the telescopic mechanism comprises a shell body and a telescopic mechanism, wherein a first pipeline, a second pipeline and a cavity are arranged in the shell body, the first pipeline and the second pipeline are communicated with the cavity, the telescopic mechanism comprises a tensioning ring, a first telescopic shaft and a second telescopic shaft, the cavity is used for accommodating the end part of the tensioning ring, which is close to the second telescopic shaft, and the end part of the second telescopic shaft, which is close to the first telescopic shaft, and the axial lead of the tensioning ring, the axial lead of the first telescopic shaft and the axial lead of the second telescopic shaft are coincident; the tensioning ring is sleeved on the outer wall of one end, close to the second telescopic shaft, of the first telescopic shaft, the inner wall of the tensioning ring is abutted with the outer wall of the first telescopic shaft, and the outer wall of the tensioning ring is abutted with the inner wall of the second telescopic shaft;
The telescopic mechanism is provided with an extending state and a retracting state, the first pipeline is used for introducing media into the cavity, so that the first telescopic shaft and the second telescopic shaft move in directions away from each other at the same time, and the telescopic mechanism is changed from the retracting state to the extending state; the second pipeline is used for introducing media into the cavity, so that the first telescopic shaft and the second telescopic shaft move towards the directions close to each other at the same time, and the telescopic mechanism is changed from the extending state to the retracting state;
The cavity comprises a first cavity, a second cavity and a third cavity, the first cavity is communicated with the first pipeline, and the third cavity is communicated with the second pipeline; the second cavity is formed by encircling the tensioning ring, the end part of the first telescopic shaft, which is close to the second telescopic shaft, and the end part of the second telescopic shaft, which is close to the first telescopic shaft; the tensioning ring comprises a plurality of tensioning blocks which are uniformly arranged at intervals, and gaps are reserved between every two adjacent tensioning blocks; when the telescopic mechanism is switched between the retracted state and the extended state, the medium circulates between the first cavity and the second cavity through a gap between adjacent tensioning blocks;
The first telescopic shaft comprises a pressing rod, the outer wall of one end, close to the second telescopic shaft, of the pressing rod is provided with a first conical surface, and the diameter of the first conical surface gradually increases from one end, far away from the second telescopic shaft, to the other end; the inner wall of the tensioning ring is provided with a second conical surface, and the first conical surface is matched with the second conical surface; the first telescopic shaft further comprises a pull rod fixedly connected with the pressure rod, the pull rod comprises a first part, a connecting part and a second part, two ends of the connecting part are respectively and fixedly connected with one end of the first part and one end of the second part, and the outer diameter of the connecting part gradually increases from one end close to the first part to the other end; the compression bar comprises a third part, a stop ring and a fourth part, one end of the third part is fixedly connected with one end of the fourth part, the stop ring is fixedly sleeved on the outer wall of the third part, which is close to one end of the fourth part, the inner wall of the tensioning ring is abutted with the outer wall of the fourth part, and the end face, which is close to the second part, of the stop ring is abutted with the end face of the second part;
The second telescopic shaft comprises a fixed seat, a first accommodating cavity is formed in the fixed seat, when the telescopic mechanism is in the extending state, one end of the compression rod, which is close to the second telescopic shaft, and one end of the tensioning ring, which is close to the fixed seat, are accommodated in the first accommodating cavity, and when the telescopic mechanism is in the retracting state, one end of the compression rod, which is close to the second telescopic shaft, and the tensioning ring are accommodated in the first accommodating cavity; the inner wall of the fixed seat is provided with a third conical surface, and the diameter of the third conical surface gradually decreases from one end close to the first telescopic shaft to the other end; the outer wall of the tensioning ring is provided with an arc-shaped surface, and the third conical surface is matched with the arc-shaped surface.
2. The hydraulic device of claim 1, wherein: the inside of second portion is offered and is used for holding the second chamber of holding of third portion, the external diameter of backstop ring is greater than the diameter of second chamber of holding just is less than or equal to the external diameter of second portion, the external diameter of backstop ring is greater than the external diameter of the one end that the fourth portion is close to the third portion.
3. The hydraulic device of claim 1, wherein: the outer diameter of the fourth part gradually increases from one end close to the stop ring to the other end, and the outer diameter of one end of the fourth part close to the second telescopic shaft is smaller than the diameter of one end, far away from the first telescopic shaft, of the first accommodating cavity; one end of the fourth part, which is far away from the stop ring, is provided with a first chamfer.
4. The hydraulic device of claim 1, wherein: the fixed seat is positioned in the cavity, the diameter of the cavity is equal to the outer diameter of the fixed seat, the depth of the cavity is larger than the length of the fixed seat, and the depth of the first accommodating cavity is smaller than the length of the fixed seat; the fixing base is far away from the one end of first telescopic shaft is provided with the second chamfer, first holding chamber is far away from the one end of first telescopic shaft is provided with the third chamfer.
5. The hydraulic device of claim 4, wherein: the cavity is far away from one end of the first telescopic shaft is provided with a fourth chamfer, when the telescopic mechanism is in the extending state, a buffer zone is formed between the second chamfer and the fourth chamfer, and the second pipeline is communicated with the buffer zone.
6. The hydraulic device of claim 1, wherein: the sealing base comprises a first base body, a second base body and a third base body which are fixedly connected in sequence, wherein the outer diameter of the first base body is larger than that of the second base body, the outer diameter of the second base body is larger than that of the third base body and equal to that of the cavity, the axial lines of the first base body, the second base body and the third base body coincide, one end of the first base body is flush with one end of the shell body, which is close to the first telescopic shaft, and the end face of the third base body, which is far away from the second base body, is close to the end face butt of the compression rod, of the tension ring.
7. The hydraulic device of claim 6, wherein: the second telescopic shaft further comprises an extension shaft fixedly connected with one end, far away from the first telescopic shaft, of the fixed seat; the shell body is further provided with a first through hole and a second through hole, the first through hole and the second through hole are communicated with the cavity, the first seat body is located in the first through hole, the second seat body and the third seat body are located in the cavity, the diameter of the first through hole is equal to the outer diameter of the first seat body, the diameter of the second through hole is equal to the outer diameter of the extension shaft and smaller than the diameter of the cavity, and the depth of the second through hole is smaller than the length of the extension shaft.
8. The hydraulic device of claim 6, wherein: the inside of seal base has seted up the third and has held the chamber, the diameter in third holds the chamber equals the external diameter of second portion, the degree of depth in third holds the chamber is greater than the length of second portion, the second portion is located in the third holds the chamber.
9. The hydraulic device of claim 1, wherein: the first pipeline comprises a first branch and a second branch which are communicated, the first branch is parallel to the depth direction of the cavity, the first branch is perpendicular to the second branch, and the second branch is communicated with the first cavity.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251240A (en) * | 2013-06-25 | 2014-12-31 | 罗伯特·博世有限公司 | Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same |
| CN104591014A (en) * | 2014-11-25 | 2015-05-06 | 中联重科股份有限公司 | Telescopic cylinder, landing leg control system and crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2498273Y (en) * | 2001-08-23 | 2002-07-03 | 张新华 | Double-direction and double-route actuator |
| US10677271B2 (en) * | 2016-12-05 | 2020-06-09 | Eaton Intelligent Power Limited | Hydraulic cylinder |
| CN218509851U (en) * | 2022-08-22 | 2023-02-21 | 三一重型装备有限公司 | Double-rod oil cylinder and coal mining device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251240A (en) * | 2013-06-25 | 2014-12-31 | 罗伯特·博世有限公司 | Four-chamber cylinder for a hydraulic actuating device with emergency function and hydraulic actuating device employing same |
| CN104591014A (en) * | 2014-11-25 | 2015-05-06 | 中联重科股份有限公司 | Telescopic cylinder, landing leg control system and crane |
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