CN110792654B - Static pressure support guide hydraulic cylinder - Google Patents
Static pressure support guide hydraulic cylinder Download PDFInfo
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- CN110792654B CN110792654B CN201911054730.9A CN201911054730A CN110792654B CN 110792654 B CN110792654 B CN 110792654B CN 201911054730 A CN201911054730 A CN 201911054730A CN 110792654 B CN110792654 B CN 110792654B
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- 230000003068 static effect Effects 0.000 title claims abstract description 16
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 claims abstract description 7
- 239000003921 oil Substances 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 11
- 238000001125 extrusion Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 229910000906 Bronze Inorganic materials 0.000 claims description 8
- 239000010974 bronze Substances 0.000 claims description 8
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 8
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 12
- 239000010720 hydraulic oil Substances 0.000 description 11
- 230000008093 supporting effect Effects 0.000 description 5
- 230000008602 contraction Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 235000009537 plain noodles Nutrition 0.000 description 1
Images
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
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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
-
- 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
- F15B15/1433—End caps
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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
- F15B15/1471—Guiding means other than in the end cap
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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
-
- 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)
- Actuator (AREA)
Abstract
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a static pressure support guide hydraulic cylinder; comprises a cylinder body; an upper oil pipe and a lower oil pipe are arranged at the upper end and the lower end of the cylinder body, and an oil cavity is formed in the cylinder body; a hydraulic rod is arranged in the oil cavity in a sliding manner, and a sealing plug is arranged at the bottom end of the hydraulic rod; the upper end of the cylinder body is provided with an upper end cover, and the lower end of the cylinder body is provided with a lower end cover; the sealing plug and the upper end cover are both provided with damping holes for static pressure support; a cross guide groove is formed in the piston rod in the vertical direction, and a cross guide strip is fixedly inserted in the cross guide groove; a cross sliding cavity is formed in the vertical direction of the cross guide strip, and a guide sliding rod is inserted in the cross sliding cavity in a sliding manner; the bottom end of the guide sliding rod is fixed on the lower end cover; the hydraulic rod is formed by mutually splicing a plurality of guide columns; the guide slide bar can play an axial rotation limiting role for the cross guide bar, so that the extended hydraulic rod can only slide in the cylinder body in a reciprocating mode, and cannot rotate axially in the cylinder body.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a static pressure support guide hydraulic cylinder.
Background
Hydraulic drives and their control technology are widely used in the mechanical industry with their unique advantageous properties, hydraulic cylinders being the most commonly used element in hydraulic technology to achieve reciprocating motion.
The hydraulic cylinder is an industrial automation device with wide application, and the structure of the hydraulic cylinder is generally that a guide sleeve is arranged in a cylinder barrel, and then components such as a piston, a piston rod and the like are arranged in the guide sleeve.
When the existing hydraulic cylinder is used, if a hydraulic rod of the hydraulic cylinder is connected with a connected piece, the connected piece only needs to reciprocate horizontally or vertically, and meanwhile, when a rotating device can drive a cylinder body and the hydraulic rod to synchronously rotate, the hydraulic rod or the cylinder body generates a separation rotation phenomenon because a rotation limiting device is not arranged between the hydraulic rod and the cylinder body, so that the installation and use effects of the hydraulic cylinder body on the connected piece are influenced;
meanwhile, the hydraulic rod terminal can reach a higher speed, and can generate mechanical collision with the cylinder bottom under the action of inertia force and hydraulic pressure, so that impact vibration and noise are generated, adverse influence is generated on the whole hydraulic system, and the service life of the hydraulic system is shortened.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides the static pressure support guide hydraulic cylinder which is mainly used for solving the problem that the hydraulic rod or the cylinder body generates separation rotation due to the fact that no rotation limiting device is arranged between the hydraulic rod and the cylinder body, and further the installation and use effects of the hydraulic cylinder body on a connected piece are influenced; the hydraulic rod can generate mechanical collision with the cylinder bottom under the action of inertia force and hydraulic pressure, so that impact vibration and noise are generated.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a static pressure support guide hydraulic cylinder which comprises a cylinder body, an upper oil pipe and a lower oil pipe; an upper oil pipe and a lower oil pipe are arranged at the upper end and the lower end of the cylinder body, and an oil cavity is formed in the cylinder body; a hydraulic rod is arranged in the oil cavity in a sliding mode, and a sealing plug is arranged at the bottom end of the hydraulic rod; the upper end of the cylinder body is provided with an upper end cover, and the lower end of the cylinder body is provided with a lower end cover; the sealing plug and the upper end cover are both provided with damping holes for static pressure support; a cross-shaped guide groove is formed in the hydraulic rod in the vertical direction, and a cross-shaped guide strip is fixedly inserted in the cross-shaped guide groove; a cross sliding cavity is formed in the vertical direction of the cross guide strip, and a guide sliding rod is inserted in the cross sliding cavity in a sliding manner; the bottom end of the guide sliding rod is fixed on the lower end cover; the hydraulic rod is formed by splicing a plurality of guide columns; when the hydraulic cylinder works, when a hydraulic rod needs to extend out, hydraulic oil enters an oil cavity of the cylinder body through the lower oil pipe, along with the continuous entering of the hydraulic oil in the oil cavity, the hydraulic rod can extend out to the outside of the cylinder body by the thrust of the hydraulic oil, the extension of the hydraulic rod can drive the guide cross bar to slide upwards along the guide slide bar, the bottom end part of the guide slide bar is fixed on the lower end cover, and the guide slide bar can play a role in limiting the axial rotation of the cross guide bar, so that the extended hydraulic rod can only slide in the cylinder body in a reciprocating manner but can not rotate in the cylinder body, further the hydraulic cylinder is prevented from reciprocating in the horizontal or vertical direction only by the connecting piece, and when the rotating device can drive the cylinder body and the hydraulic rod to rotate synchronously, the phenomenon of the hydraulic rod or the cylinder body is caused because no rotation limiting device is arranged between the hydraulic rod and the cylinder body, the installation and use effects of the hydraulic cylinder body on the connected piece are further influenced, and the damping holes are formed, so that a static pressure supporting effect can be formed between the hydraulic rod and the cylinder body and the upper end cover in the movement process; the hydraulic rod formed by splicing the guide columns can replace a piston rod which is exposed outside for a long time and seriously abraded.
Preferably, the top ends of the guide posts are provided with convex posts, and the convex posts are provided with external threads; the lower end of the guide post is provided with an installation groove, and an internal thread is arranged in the installation groove; the last guide column is installed on the next protruding column through threads; the guide posts are all provided with cross guide grooves and are connected in series through cross guide strips; when the hydraulic rod splicing device works, the guide rods are connected through threads, so that the hydraulic rods are convenient to disassemble and replace, and meanwhile, connecting devices used among the guide columns spliced with each other are reduced, and the used materials of the spliced hydraulic rods are further reduced; simultaneously a plurality of guide posts establish ties through the cross gib block, prevent effectively that when the hydraulic stem rotates, mutual threaded connection's a plurality of guide posts when the hydraulic stem rotates, the phenomenon that the rotation drops takes place for the guide post, and then influences the hydraulic stem and by the stable connection of connecting piece, influence the hydraulic stem simultaneously and to being supported by the stable of connecting piece.
Preferably, the depth of the mounting groove is greater than the height of the protruding column; a spiral spring is fixed in the mounting groove and is positioned in a thread groove of the internal thread; a sealing ring is arranged between the adjacent guide columns; when the guide post is driven by the connecting piece to rotate, the torsion force of the guide post can enable the spiral spring to generate torsion force, and meanwhile, the reaction force of the spiral spring can offset the torsion force, the helical spring can reduce the torsion force applied to the next guide post, and the helical spring arranged between the two adjacent guide posts, can effectively reduce the problem that when the hydraulic rod is driven by the connecting piece to rotate, the hydraulic rod is rigidly connected with the guide slide rod, thereby causing the instant torsion force of the hydraulic rod to cause the axial torsion phenomenon of the guide slide rod, the phenomenon that the guide sliding rod is broken due to repeated instant torsional force not only influences the effect of the guide sliding rod on the rotation limit of the hydraulic rod, but also influences the service life of the guide hydraulic rod.
Preferably, a sealing slide block is arranged at the top end of the guide slide rod, the sealing block is positioned in the cross-shaped slide cavity, and a gas guide cavity is formed in the guide slide rod; the top end of the air guide cavity is communicated with the cross sliding cavity, and the bottom end of the air guide cavity is provided with an air control valve; when the cross guide bar moves upwards, air is sucked into a gap between the top end of the guide slide bar and the inside of the cross slide cavity through the air guide cavity, and the air control valve is controlled to be closed by the control unit; when the hydraulic rod supports the connected piece, the gas in the guide slide rod and the cross slide cavity can support the hydraulic rod, so that the supporting force of the hydraulic rod on the connected piece is further increased; meanwhile, when the hydraulic rod contracts, the control unit controls the air control valve to be opened firstly, the air control valve slowly discharges air in the air guide cavity, and meanwhile, the oil discharging pipe discharges oil below the sealing plug, so that the hydraulic rod can realize slow static pressure reduction, and the phenomenon that the contraction speed of the hydraulic rod is too high to cause vibration of a connected piece is avoided.
Preferably, the guide sliding strips arranged on the outer side walls of the guide sliding rods are all smooth surfaces, and bronze materials are coated on the outer walls of the guide sliding strips; the cross guide strip is formed by splicing, and bronze materials are uniformly coated on the wall of a cross sliding cavity in the cross guide strip; the guide slide bar is set to plain noodles and bronze material, can effectively reduce the frictional force between guide slide bar and the cross gib block, when preventing that the cross gib block from reciprocating sliding on the guide slide bar, the phenomenon that guide slide bar and cross gib block take place wearing and tearing, and then leads to hydraulic oil to enter into the top in cross sliding chamber along the guide slide bar, and then influences the sealed effect between guide slide bar and the cross gib block.
Preferably, an extrusion cavity is formed in the sealing ring, and lubricating oil is filled in the extrusion cavity; the intensity and the hardness that the packing can improve the sealing washer in the extrusion chamber, prevent that the holding power of hydraulic stem is too big, lead to the sealing washer to take place the phenomenon of extrusion deformation, and then influence coil spring and protruding post stable connection.
The invention has the following beneficial effects:
1. the guide slide bar can play a role in axial rotation limiting on the cross guide bar, so that the extended hydraulic rod can only slide in a reciprocating manner in the cylinder body but cannot rotate in the cylinder body in an axial manner, the hydraulic cylinder is prevented from reciprocating in the horizontal or vertical direction of the connected piece, and when the rotating device can drive the cylinder body and the hydraulic rod to rotate synchronously, the phenomenon that the hydraulic rod or the cylinder body rotates separately due to the fact that the rotation limiting device is not arranged between the hydraulic rod and the cylinder body is avoided, and the installation and use effects of the hydraulic cylinder body on the connected piece are further influenced.
2. When the hydraulic rod contracts, the control unit firstly controls the air control valve to open, the air control valve slowly discharges air in the air guide cavity, and the oil discharge pipe discharges oil below the sealing plug, so that the hydraulic rod can slowly decrease in static pressure, and the phenomenon that the connected piece vibrates due to overlarge contraction speed of the hydraulic rod is prevented; prevent that the hydraulic stem from under the effect of inertial force and hydraulic pressure, can produce mechanical collision with the cylinder bottom, not only reduce the life of cylinder body, reduce the stable support effect of hydraulic stem to being connected simultaneously.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an assembly view of the cross guide bar and guide slide bar of the present invention;
FIG. 4 is an assembly view of the hydraulic ram of the present invention;
in the figure: the hydraulic cylinder comprises a cylinder body 1, an oil cavity 11, an upper oil pipe 2, a lower oil pipe 3, a hydraulic rod 4, a cross guide groove 41, a guide column 42, a protruding column 43, a mounting groove 44, an upper end cover 5, a damping hole 51, a lower end cover 6, a cross guide strip 7, a cross sliding cavity 71, a guide sliding rod 8, an air guide cavity 81, a spiral spring 9, a sealing ring 10, an extrusion cavity 101, a sealing slide block 20 and an air control valve 30.
Detailed Description
A hydrostatic support pilot cylinder according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1-4, the hydrostatic support guide hydraulic cylinder of the present invention comprises a cylinder body 1, an upper oil pipe 2 and a lower oil pipe 3; an upper oil pipe 2 and a lower oil pipe 3 are arranged at the upper end and the lower end of the cylinder body 1, and an oil cavity 11 is formed in the cylinder body 1; a hydraulic rod 4 is arranged in the oil cavity 11 in a sliding mode, and a sealing plug is arranged at the bottom end of the hydraulic rod 4; the upper end of the cylinder body 1 is provided with an upper end cover 5, and the lower end of the cylinder body 1 is provided with a lower end cover 6; the sealing plug and the upper end cover 5 are both provided with damping holes 51 supported by static pressure; a cross-shaped guide groove 41 is formed in the hydraulic rod 4 in the vertical direction, and a cross-shaped guide strip 7 is fixedly inserted in the cross-shaped guide groove 41; a cross sliding cavity 71 is formed in the cross guide strip 7 in the vertical direction, and a guide sliding rod 8 is inserted in the cross sliding cavity 71 in a sliding manner; the bottom end of the guide slide bar 8 is fixed on the lower end cover 6; the hydraulic rod 4 is formed by splicing a plurality of guide columns 42; when the hydraulic cylinder works, when the hydraulic rod 4 needs to extend out, hydraulic oil enters the oil cavity 11 of the cylinder body 1 through the lower oil pipe 3, the hydraulic oil in the oil cavity 11 continuously enters, the hydraulic rod 4 can extend out to the outside of the cylinder body 1 under the thrust of the hydraulic oil, the extension of the hydraulic rod 4 can drive the guide cross bar to slide upwards along the guide slide bar 8, the bottom end part of the guide slide bar 8 is fixed on the lower end cover 6, and the guide slide bar 8 can play a role of axial rotation limit on the cross guide bar 7, so that the extended hydraulic rod 4 can only slide in the cylinder body 1 in a reciprocating manner and cannot rotate in the cylinder body 1 in the axial direction, the hydraulic cylinder is prevented from being used in a reciprocating manner only in the horizontal or vertical direction by a connecting piece, and when the rotating device can drive the cylinder body 1 and the hydraulic rod 4 to synchronously rotate, because no rotation limit device is arranged between the hydraulic rod 4 and the cylinder body 1, the phenomenon that the hydraulic rod 4 or the cylinder body 1 rotates is caused, the installation and use effects of the hydraulic cylinder body 1 on a connected part are further influenced, and meanwhile, the damping hole 51 is formed, so that a static pressure supporting effect can be formed between the hydraulic rod 4 and the cylinder body 1 and the upper end cover 5 in the movement process; the hydraulic rod 4 formed by splicing the guide columns 42 can replace a piston rod which is exposed outside for a long time and seriously worn.
As shown in fig. 2-4, a plurality of guide posts 42 are provided with a raised post 43 at the top end thereof, and the raised post 43 is provided with an external thread; the lower end of the guide post 42 is provided with a mounting groove 44, and an internal thread is arranged in the mounting groove 44; the last guide post 42 is mounted on the next projection post 43 through threads; a plurality of guide posts 42 are internally provided with a cross-shaped guide slot 41, and the guide posts 42 are mutually connected in series through a cross-shaped guide strip 7; when the hydraulic rod splicing device works, the plurality of guide rods are connected through threads, so that the hydraulic rods 4 are convenient to disassemble and replace, and meanwhile, connecting devices used among the guide columns 42 spliced with each other are reduced, and the used materials of the spliced hydraulic rods 4 are further reduced; simultaneously a plurality of guide posts 42 establish ties through cross gib block 7, effectively prevent when hydraulic stem 4 rotates, mutual threaded connection's a plurality of guide posts 42 when hydraulic stem 4 rotates, guide post 42 takes place the phenomenon that the rotation drops, and then influences hydraulic stem 4 and by the stable connection of connecting piece, influences hydraulic stem 4 simultaneously and to being supported by the stable of connecting piece.
As shown in fig. 2 to 4, the depth of the mounting groove 44 is greater than the height of the protruding column 43; a spiral spring 9 is fixed in the mounting groove 44, and the spiral spring 9 is positioned in a thread groove of the internal thread; a sealing ring 10 is arranged between the adjacent guide columns 42; when the hydraulic guide device works, the spiral spring 9 arranged between the protruding column 43 and the mounting groove 44, when the guide column 42 at the top end is driven by the connecting piece to rotate, the torsion force of the guide column 42 can enable the spiral spring 9 to generate torsion force, meanwhile, the reaction force of the spiral spring 9 can offset the torsion force, further, the spiral spring 9 can reduce the torsion force applied to the next guide column 42, further, through the spiral spring 9 arranged between two adjacent guide columns 42, the phenomenon that when the hydraulic rod 4 is driven by the connecting piece to rotate, the guide slide rod 8 is axially twisted due to the instant torsion force of the hydraulic rod 4 caused by the rigid connection between the hydraulic rod 4 and the guide slide rod 8 can be effectively reduced, when the guide slide rod 8 is used for a long time, the phenomenon that the guide slide rod 8 is broken due to the instant torsion force for many times can be generated, and the effect of the guide slide rod 8 on the rotation limit of the hydraulic rod 4 is not only influenced, while affecting the service life of the pilot hydraulic ram 4.
As shown in fig. 2 to 4, a sealing slide block 20 is disposed at the top end of the guide slide bar 8, and the sealing block is located in the cross slide cavity 71, and a gas guide cavity 81 is formed inside the guide slide bar 8; the top end of the air guide cavity 81 is communicated with the cross sliding cavity 71, and the bottom end of the air guide cavity 81 is provided with an air control valve 30; when the cross guide bar 7 moves upwards along the guide slide bar 8, the control unit of the control hydraulic cylinder controls the pneumatic control valve 30 to be opened, when the cross guide bar 7 moves upwards, air is sucked into a gap between the top end of the guide slide bar 8 and the inside of the cross slide cavity through the air guide cavity 81, and meanwhile, the control unit controls the pneumatic control valve 30 to be closed; when the hydraulic rod 4 supports the connected piece, the gas in the guide slide rod 8 and the cross slide cavity 71 can support the hydraulic rod 4, so that the supporting force of the hydraulic rod 4 on the connected piece is further increased; meanwhile, when the hydraulic rod 4 contracts, the control unit firstly controls the air control valve 30 to be opened, the air control valve 30 slowly discharges air in the air guide cavity 81, and meanwhile the oil discharging pipe 3 discharges oil below the sealing plug, so that the hydraulic rod 4 can realize slow static pressure reduction, and the phenomenon that the hydraulic rod 4 is contracted at an overlarge speed to cause vibration of a connected piece is prevented.
As shown in fig. 2 to 4, the guide sliding strips arranged on the outer side walls of the guide sliding rods 8 are all smooth surfaces, and the outer walls of the guide sliding strips are coated with bronze materials; the cross guide strips 7 are formed by splicing, and bronze materials are uniformly coated on the wall of the cross sliding cavity 71 in the cross guide strips 7; the guide slide bar 8 is made of smooth surfaces and bronze materials, so that friction force between the guide slide bar 8 and the cross guide strip 7 can be effectively reduced, and the phenomenon that the guide slide bar 8 and the cross guide strip 7 are abraded when the cross guide strip 7 slides on the guide slide bar 8 in a reciprocating mode is prevented, so that hydraulic oil enters the top end of the cross sliding cavity 71 along the guide slide bar 8, and the sealing effect between the guide slide bar 8 and the cross guide strip 7 is influenced.
As shown in fig. 3 and 4, an extrusion chamber 101 is formed in the sealing ring 10, and lubricating oil is filled in the extrusion chamber 101; the lubricating oil filled in the extrusion cavity 101 can improve the strength and hardness of the sealing ring 10, and prevent the phenomenon that the sealing ring 10 is extruded and deformed due to overlarge supporting force of the hydraulic rod 4, thereby influencing the stable connection of the spiral spring 9 and the protruding column 43.
The specific working process is as follows:
when doing, when needing hydraulic stem 4 to stretch out, enter into the oil pocket 11 of cylinder body 1 with hydraulic oil through oil pipe 3 down, along with the continuous entering of hydraulic oil in the oil pocket 11, the thrust of hydraulic oil can make hydraulic stem 4 stretch out to the outside of cylinder body 1, stretching out of hydraulic stem 4 can drive the direction cross strip along the direction slide bar 8 upwards sliding, bottom portion because of the direction slide bar 8 is fixed on lower end cover 6, and direction slide bar 8 can play the spacing effect of axial rotation to cross guide strip 7, and then make the hydraulic stem 4 that stretches out only can be in cylinder body 1 reciprocating sliding.
In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered limiting on the scope of the present invention.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A static pressure support guide hydraulic cylinder comprises a cylinder body (1), an upper oil pipe (2) and a lower oil pipe (3); an upper oil pipe (2) and a lower oil pipe (3) are mounted at the upper end and the lower end of the cylinder body (1), and an oil cavity (11) is formed in the cylinder body (1); the method is characterized in that: a hydraulic rod (4) is arranged in the oil cavity (11) in a sliding mode, and a sealing plug is arranged at the bottom end of the hydraulic rod (4); an upper end cover (5) is arranged at the upper end of the cylinder body (1), and a lower end cover (6) is arranged at the lower end of the cylinder body (1); damping holes (51) supported by static pressure are formed in the sealing plug and the upper end cover (5); a cross guide groove (41) is formed in the hydraulic rod (4) in the vertical direction, and a cross guide strip (7) is fixedly inserted in the cross guide groove (41); a cross sliding cavity (71) is formed in the cross guide strip (7) in the vertical direction, and a guide sliding rod (8) is inserted in the cross sliding cavity (71) in a sliding manner; the bottom end of the guide sliding rod (8) is fixed on the lower end cover (6); the hydraulic rod (4) is formed by mutually splicing a plurality of guide columns (42).
2. A hydrostatic support pilot cylinder as set forth in claim 1, wherein: the top ends of the guide columns (42) are provided with convex columns (43), and the convex columns (43) are provided with external threads; the lower end of the guide post (42) is provided with an installation groove (44), and an internal thread is arranged in the installation groove (44); the last guide post (42) is installed on the next protruding post (43) through threads; a plurality of cross guide grooves (41) are formed in the guide columns (42), and the guide columns (42) are connected in series through cross guide strips (7).
3. A hydrostatic support pilot cylinder as set forth in claim 2, wherein: the depth of the mounting groove (44) is greater than the height of the protruding column (43); a spiral spring (9) is fixed in the mounting groove (44), and the spiral spring (9) is positioned in a thread groove of the internal thread; and a sealing ring (10) is arranged between the adjacent guide columns (42).
4. A hydrostatic support pilot cylinder as set forth in claim 1, wherein: a sealing sliding block (20) is arranged at the top end of the guide sliding rod (8), the sealing sliding block (20) is positioned in the cross sliding cavity (71), and a gas guide cavity (81) is formed in the guide sliding rod (8); the top end of the air guide cavity (81) is communicated with the cross sliding cavity (71), and the bottom end of the air guide cavity (81) is provided with an air control valve (30).
5. A hydrostatic support pilot cylinder as set forth in claim 4, wherein: the guide sliding strips arranged on the outer side walls of the guide sliding rods (8) are all smooth surfaces, and bronze materials are coated on the outer walls of the guide sliding strips; the cross guide strip (7) is formed by splicing, and bronze materials are uniformly coated on the wall of the cross sliding cavity (71) in the cross guide strip (7).
6. A hydrostatic support pilot cylinder as set forth in claim 3, wherein: an extrusion cavity (101) is formed in the sealing ring (10), and lubricating oil is filled in the extrusion cavity (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054730.9A CN110792654B (en) | 2019-10-31 | 2019-10-31 | Static pressure support guide hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911054730.9A CN110792654B (en) | 2019-10-31 | 2019-10-31 | Static pressure support guide hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN110792654A CN110792654A (en) | 2020-02-14 |
| CN110792654B true CN110792654B (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911054730.9A Active CN110792654B (en) | 2019-10-31 | 2019-10-31 | Static pressure support guide hydraulic cylinder |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3718308A1 (en) * | 1987-05-30 | 1989-01-12 | Gerhard Hanik Maschinenbau Ing | Fluid working cylinder |
| CN202040144U (en) * | 2011-03-18 | 2011-11-16 | 台州飞跃双星成衣机械有限公司 | Anti-rotating air cylinder for piston rod |
| CN202326502U (en) * | 2011-11-15 | 2012-07-11 | 吕新 | Air cylinder capable of preventing piston rod from rotating |
| CN102943786A (en) * | 2012-12-11 | 2013-02-27 | 湖南特力液压有限公司 | Hydraulic cylinder |
| CN109958669A (en) * | 2018-08-30 | 2019-07-02 | 哈尔滨理工大学 | A kind of servo hydraulic cylinder hydrostatic seal guide sleeve of diesis shape chamber |
-
2019
- 2019-10-31 CN CN201911054730.9A patent/CN110792654B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3718308A1 (en) * | 1987-05-30 | 1989-01-12 | Gerhard Hanik Maschinenbau Ing | Fluid working cylinder |
| CN202040144U (en) * | 2011-03-18 | 2011-11-16 | 台州飞跃双星成衣机械有限公司 | Anti-rotating air cylinder for piston rod |
| CN202326502U (en) * | 2011-11-15 | 2012-07-11 | 吕新 | Air cylinder capable of preventing piston rod from rotating |
| CN102943786A (en) * | 2012-12-11 | 2013-02-27 | 湖南特力液压有限公司 | Hydraulic cylinder |
| CN109958669A (en) * | 2018-08-30 | 2019-07-02 | 哈尔滨理工大学 | A kind of servo hydraulic cylinder hydrostatic seal guide sleeve of diesis shape chamber |
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| Publication number | Publication date |
|---|---|
| CN110792654A (en) | 2020-02-14 |
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Address after: 264000 No. 6, Beijing South Road, Yantai Development Zone, Yantai District, Yantai City (Shandong) pilot Free Trade Zone, Shandong Province Patentee after: Shandong Xinghui Hydraulic Equipment Co.,Ltd. Address before: 264000 No. 6, Beijing South Road, Yantai Development Zone, Yantai District, Yantai City (Shandong) pilot Free Trade Zone, Shandong Province Patentee before: Yantai Xinghui LOUSBERG Hydraulic Machinery Co.,Ltd. |