CN116838665A - Hydraulic cylinder with guiding device - Google Patents

Hydraulic cylinder with guiding device Download PDF

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Publication number
CN116838665A
CN116838665A CN202310859924.6A CN202310859924A CN116838665A CN 116838665 A CN116838665 A CN 116838665A CN 202310859924 A CN202310859924 A CN 202310859924A CN 116838665 A CN116838665 A CN 116838665A
Authority
CN
China
Prior art keywords
piston rod
cylinder body
groove
ring
annular
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310859924.6A
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Chinese (zh)
Inventor
张力钧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Hongjin Hydraulic Technology Co ltd
Original Assignee
Wuxi Hongjin Hydraulic Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Hongjin Hydraulic Technology Co ltd filed Critical Wuxi Hongjin Hydraulic Technology Co ltd
Priority to CN202310859924.6A priority Critical patent/CN116838665A/en
Publication of CN116838665A publication Critical patent/CN116838665A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F15B15/1438—Cylinder to end cap assemblies
    • F15B15/1442—End cap sealings
    • 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
    • F15B15/1457—Piston rods
    • F15B15/1461—Piston rod sealings
    • 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
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • 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
    • F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
    • F15B2215/30—Constructional details thereof

Abstract

The hydraulic cylinder with the guide device comprises a cylinder body and a piston rod which is connected in the cylinder body in a sliding and sealing mode, wherein a guide mechanism is arranged on the cylinder body and used for guiding the piston rod; the end part of the cylinder body is also provided with a leakage-proof mechanism which is used for sealing and leakage-proof the end parts of the piston rod and the cylinder body. In order to solve the problem that the piston rod cannot stably drive an object due to unstable axial movement between the piston rod and the cylinder body and the problem of abrasion of the cylinder body, the invention is provided with the guide mechanism on the cylinder body so as to guide the piston rod during movement and support the piston rod, thereby correcting the movement path of the piston rod and reducing the abrasion between the piston rod and the cylinder body caused by bending; meanwhile, the leakage-proof mechanism is arranged at the contact position of the cylinder body and the piston rod, so that the leakage of hydraulic oil from the contact position of the cylinder body and the piston rod is prevented, and the stability of the hydraulic oil cylinder is enhanced.

Description

Hydraulic cylinder with guiding device
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a guiding device.
Background
The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). The device has simple structure and reliable operation. When it is used to realize reciprocating motion, it can eliminate speed reducer, and has no transmission clearance and smooth motion, so that it can be widely used in hydraulic systems of various machines. The output force of the hydraulic cylinder is in direct proportion to the effective area of the piston and the pressure difference between two sides of the effective area of the piston; the hydraulic cylinder basically consists of a cylinder barrel, a cylinder cover, a piston rod, a sealing device and the like.
However, in the actual production process, after the hydraulic oil cylinder is used for a period of time, the problem that the axial movement between the piston rod and the cylinder body is unstable easily occurs in the running process of the hydraulic oil cylinder, so that the piston rod cannot stably drive an object, and the problem of abrasion of the cylinder body is caused.
In order to solve the above problems, the present invention proposes a hydraulic cylinder having a guide device.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects of the prior art, adapt to the actual needs, and provide a hydraulic cylinder with a guiding device so as to solve the technical problems.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the hydraulic cylinder with the guide device comprises a cylinder body and a piston rod which is connected in the cylinder body in a sliding and sealing mode, wherein a guide mechanism is arranged on the cylinder body and used for guiding the piston rod; the end part of the cylinder body is also provided with a leakage-proof mechanism which is used for sealing and leakage-proof the end parts of the piston rod and the cylinder body.
Further, the guide mechanism includes:
the sliding rail is fixedly arranged on the outer side wall of the cylinder body;
the support plate is slidably mounted on the sliding rail;
the connecting sleeve is fixedly connected with the supporting plate through a connecting frame, the connecting sleeve is detachably fixed on the bottom surface of the mounting block, and the mounting block is fixed on the top of the piston rod;
the telescopic rods are arranged in a plurality, one end of each telescopic rod is fixedly connected to the bottom of the connecting sleeve, the other end of each telescopic rod is fixedly arranged on the end face of the cylinder body, and the telescopic rods are uniformly distributed along the circumference.
Further, the leakage preventing mechanism includes:
the sealing groove is arranged at the contact position of the cylinder body and the piston rod and is annular;
the sealing ring is embedded into the sealing groove, and the inner surface of the sealing ring is in contact with the piston rod;
the outer ring of the reinforcing sleeve is detachably fixed on the cylinder body and is concentrically arranged with the piston rod; the inner top surface of the reinforcing sleeve and the sealing groove form an installation space of the sealing ring.
Further, the leakage-proof mechanism further comprises a reinforcing component, the reinforcing component comprises an arc-shaped groove, two symmetrical arc-shaped grooves are formed in the reinforcing sleeve, inserting blocks are connected in the arc-shaped grooves in a sliding mode, annular notch grooves are formed in the sealing ring, and the thickness of the inserting blocks is gradually decreased from top to bottom; the sealing ring can be extruded from the annular notch groove through the downward movement of the inserting block.
Further, insert the fixed setting in annular ring jointly in piece top, the U type barrel of inversion is installed to annular ring top, two sections of equal sliding seal of U type barrel are connected with the vice pole of piston, one of them the vice pole of piston is fixed to be set up on the annular ring, another the vice pole of piston is inconsistent with the ejector pad upper surface, ejector pad swing joint is in the spout of seting up in the backup pad, be equipped with supporting spring in the spout.
Further, lubricating oil is filled in the annular incision groove, an oil hole is formed in one side, facing the piston rod, of the annular incision groove, and the oil hole is used for connecting the annular incision groove and a rod body of the piston rod; the oil hole is located at one end of the annular notch groove, the height of the oil hole is larger than that of one end, close to the piston rod, of the annular notch groove, and an expansion hole is formed in one end, close to the piston rod, of the annular notch groove.
Further, the bottom of the annular incision groove is provided with an oil containing groove which is communicated with the annular incision groove, and an interval is arranged between the oil hole and the oil containing groove.
Further, the fixed sleeve is fixedly provided with an oil injection pipe, the bottom end of the oil injection pipe is communicated with the annular notch groove, and the top end of the oil injection pipe is connected with an external oil injection device.
Further, be provided with the detection component on the inner circle of fixed cover, the detection component includes a plurality of circumference distributed's recess, be connected with a plurality of probes through supporting pressing spring elastic connection in the recess, the probe deviates from the one end of recess sets up to arc structure, and the other end is fixed with the extrusion ring, the extrusion ring is in with the fixed sensor contact that sets up on the recess lateral wall.
(3) The beneficial effects are that:
A. the guide mechanism is arranged on the cylinder body, so that the guide mechanism is used as a guide when the piston rod moves and supports the piston rod to correct the moving path of the piston rod and reduce the abrasion between the piston rod and the cylinder body after the piston rod is bent; meanwhile, a leakage-proof mechanism is arranged at the contact position of the cylinder body and the piston rod, so that the leakage of hydraulic oil from the contact position of the cylinder body and the piston rod is prevented, and the stability of the hydraulic oil cylinder is enhanced;
B. according to the invention, the leakage-proof mechanism is arranged at the end part of the cylinder body, and the gap between the cylinder body and the piston rod is filled by the action of the sealing ring in the leakage-proof mechanism, so that the tightness between the cylinder body and the piston rod is enhanced; in the extending and retracting process of the piston rod, the sealing ring can be extruded through the reinforcing component, so that the contact degree between the sealing ring and the piston rod is enhanced, the sealing performance is further improved, and the possibility of oil leakage is reduced; the guide mechanism is matched with the leakage-proof mechanism, so that the larger the outward extension distance of the guide mechanism is, the larger the extrusion effect of the insertion block on the sealing ring in the matched leakage-proof mechanism is, the larger the contact tightness between the sealing ring and the rod body of the piston rod is, and the better the leakage-proof effect of hydraulic oil is in positive correlation.
C. According to the invention, the insert block moves downwards in the annular notch groove, so that the annular notch groove is extruded to deform outwards towards one side of the piston rod, lubricating oil at the bottom can gradually enter the contact position of the sealing ring and the rod body of the piston rod along the oil hole, so that the rod body of the piston rod is uniformly smeared and lubricated, on one hand, friction between the rod body and the cylinder body and between the rod body and the sealing ring are reduced, and the abrasion degree of the sealing ring and the cylinder body is reduced; on the other hand, in the process of extending and contracting the piston rod, the sealing ring deforms after being extruded by the inserting block, so that the defect of the sealing ring after being worn can be compensated, and the failure time of the sealing ring can be prolonged; and lubricating oil can also be adhered to the surface of the insert block, so that the insert block and the side wall of the annular notch groove are lubricated, and the insert block moves downwards more smoothly.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of the partial enlarged structure of FIG. 2A;
FIG. 4 is a top view of the reinforcement sleeve of the present invention;
fig. 5 is a schematic view of a partial enlarged structure at B in fig. 3.
The reference numerals are as follows:
1. a cylinder; 2. a piston rod; 3. a guide mechanism; 31. a slide rail; 32. a support plate; 33. connecting sleeves; 34. a telescopic rod; 35. a mounting block; 36. a connecting frame; 4. a leakage prevention mechanism; 41. sealing grooves; 42. a seal ring; 43. reinforcing the sleeve; 44. a reinforcing component; 441. an arc-shaped groove; 442. inserting blocks; 443. an annular slit groove; 444. an annular ring; 445. a U-shaped cylinder; 446. a piston auxiliary rod; 447. a pushing block; 5. an oil hole; 6. rong Youcao; 7. a filler pipe; 8. expanding the hole; 9. a chute; 10. a support spring; 11. a detection assembly; 12. a groove; 13. pressing the spring; 14. a probe; 15. a pressing ring; 16. the sensor contacts.
Detailed Description
The invention is further illustrated by the following examples in connection with figures 1-5:
the hydraulic cylinder with the guide device comprises a cylinder body 1 and a piston rod 2 which is connected in the cylinder body 1 in a sliding and sealing manner, wherein a guide mechanism 3 is arranged on the cylinder body 1, and the guide mechanism 3 is used for guiding the piston rod 2; the end part of the cylinder body 1 is also provided with a leakage-proof mechanism 4, and the leakage-proof mechanism 4 is used for sealing and leakage-proof the end parts of the piston rod 2 and the cylinder body 1.
The guide mechanism 3 includes:
a slide rail 31, wherein the slide rail 31 is fixedly arranged on the outer side wall of the cylinder body 1;
a support plate 32, the support plate 32 being slidably mounted on the slide rail 31;
the connecting sleeve 33 is fixedly connected with the supporting plate 32 through a connecting frame 36, the connecting sleeve 33 is detachably fixed on the bottom surface of a mounting block 35, and the mounting block is fixed on the top of the piston rod 2;
the telescopic links 34, telescopic links 34 are equipped with a plurality of, telescopic links 34 one end fixed connection is in adapter sleeve 33 bottom, the other end is fixed to be set up on the cylinder body 1 terminal surface, a plurality of telescopic links 34 are along circumference evenly distributed. In order to solve the problems that in the prior art, after a period of use of a hydraulic oil cylinder, the piston rod 2 is easy to move unstably with the cylinder body 1 in the axial direction in the running process, so that the piston rod 2 cannot stably drive an object and the cylinder body 1 is worn, the guide mechanism 3 is arranged on the cylinder body 1 so as to serve as a guide when the piston rod 2 moves and support the piston rod 2, so that the moving path of the piston rod 2 is corrected, and the situation of abrasion with the cylinder body 1 caused by bending of the piston rod 2 is reduced; meanwhile, the leakage-proof mechanism 4 is arranged at the contact position of the cylinder body 1 and the piston rod 2, so that the leakage of hydraulic oil from the contact position of the cylinder body 1 and the piston rod 2 is prevented, and the stability of the hydraulic oil cylinder is enhanced;
the specific operation of the guide mechanism 3 is as follows: when the mounting block 35 at the end part of the piston rod 2 moves outwards, the connecting sleeve 33 is driven to synchronously move, the connecting sleeve 33 drives the connecting support plate 32 to slide outwards along the sliding rail 31, meanwhile, the telescopic rods 34 arranged in multiple sections also extend along with the connecting sleeve 33, and the plurality of telescopic rods 34 and the supporting plate 32 support and connect the connecting sleeve 33, so that the support for the extended rear end part of the piston rod 2 is formed, on one hand, the situation that the extended rear end part of the piston rod 2 is stressed and bent too much to cause abrasion due to friction with the cylinder body 1 in each telescopic movement is prevented, and the oil leakage caused by the abrasion can also be prevented; on the other hand, the multipoint support formed by the plurality of telescopic rods 34 forms the support and limit of the piston rod 2, and the probability of axial deflection of the piston rod 2 in the telescopic process can be effectively reduced.
The leak prevention mechanism 4 includes:
a seal groove 41, wherein the seal groove 41 is arranged at the contact position of the cylinder body 1 and the piston rod 2, and the seal groove 41 is arranged in an annular shape;
a seal ring 42, wherein the seal ring 42 is embedded into the seal groove 41, and the inner surface of the seal ring 42 is contacted with the piston rod 2;
the outer ring of the reinforcing sleeve 43 is detachably fixed on the cylinder body 1 and is concentrically arranged with the piston rod 2; the inner top surface of the reinforcing sleeve 43 and the sealing groove 41 form an installation space of the sealing ring 42.
The leakage-proof mechanism 4 further comprises a reinforcing component 44, the reinforcing component 44 comprises an arc-shaped groove 441, two symmetrical arc-shaped grooves 441 are formed in the reinforcing sleeve 43, the arc-shaped grooves 441 are connected with an insert block 442 in a sliding manner, an annular notch groove 443 is formed in the sealing ring 42, and the thickness of the insert block 442 is gradually decreased from top to bottom; the seal ring 42 is pressed from the ring slit 443 by the downward movement of the insert 442.
The top of the plug 442 is fixedly arranged on the annular ring 444, an inverted U-shaped cylinder 445 is arranged above the annular ring 444, two sections of the U-shaped cylinder 445 are connected with piston auxiliary rods 446 in a sliding and sealing mode, one piston auxiliary rod 446 is fixedly arranged on the annular ring 444, the other piston auxiliary rod 446 is in contact with the upper surface of the push block 447, the push block 447 is movably connected in a sliding groove 9 formed in the supporting plate 32, and a supporting spring 10 is arranged in the sliding groove 9. The piston rod 2 is extended outwards only under the action of hydraulic oil in the hydraulic oil cylinder, so that in order to reduce the situation that oil leakage occurs at the contact part of the cylinder body 1 and the piston rod 2 in the telescopic movement process of the piston rod 2, the end part of the cylinder body 1 is provided with the leakage-proof mechanism 4, and the gap between the cylinder body 1 and the piston rod 2 is filled under the action of the sealing ring 42 in the leakage-proof mechanism 4, so that the tightness between the cylinder body 1 and the piston rod 2 is enhanced; in the extending and retracting process of the piston rod 2, the sealing ring 42 can be extruded through the reinforcing component 44, so that the contact degree between the sealing ring and the piston rod 2 is enhanced, the sealing performance is further improved, and the possibility of oil leakage is reduced;
specifically, when the piston rod 2 extends outwards, the guide mechanism 3 is driven to operate, so that the push block 447 on the telescopic rod 34 moves outwards, the push block 447 extrudes the abutting piston auxiliary rod 446, so that the piston auxiliary rod 446 moves upwards, compresses hydraulic oil or air in the U-shaped cylinder 445, the piston auxiliary rod 446 at the other end moves downwards and presses the connected annular ring 444 to move downwards, the annular ring 444 extrudes the insert block 442 below downwards, and as the thickness of the insert block 442 gradually decreases from top to bottom, the more the insert block 442 gradually moves downwards into the annular slot 443 on the sealing ring 42, the greater the extrusion degree is for the sealing ring 42 to exceed the side of the piston rod 2, the contact tightness between the sealing ring 42 and the piston rod 2 is gradually enhanced from the upper side to the lower side, the purpose of enhancing the sealing performance of the contact position in the extending process of the piston rod 2 is achieved, the leakage-proof performance in the extending process of the piston rod 2 is further enhanced, meanwhile the conditions of insufficient pressure caused by the hydraulic oil and insufficient extending length are reduced.
The guide mechanism 3 is matched with the leakage-proof mechanism 4, so that the larger the outward extension distance of the guide mechanism 3 is, the larger the extrusion effect of the insert 442 in the matched leakage-proof mechanism 4 on the sealing ring 42 is, the larger the contact tightness between the sealing ring 42 and the rod body of the piston rod 2 is, and the better the leakage-proof effect of hydraulic oil is in positive correlation.
The annular incision groove 443 is filled with lubricating oil, an oil hole 5 is formed in one side of the annular incision groove 443 facing the piston rod 2, and the oil hole 5 is used for connecting the annular incision groove 443 and a rod body of the piston rod 2. The oil hole 5 is positioned at one end of the annular incision groove 443, which is higher than one end close to the piston rod 2, and an expansion hole 8 is arranged at one end close to the piston rod 2; the obliquely arranged oil holes 5 can accelerate the guiding-out action of the lubricating oil and improve the lubricating efficiency, and the arrangement of the expansion holes 8 can increase the basic areas of the lubricating oil and the rod body and accelerate the oiling speed;
the fixed sleeve is fixedly provided with an oil filler pipe 7, the bottom end of the oil filler pipe 7 is communicated with the annular incision groove 443, and the top end of the oil filler pipe is connected with an external oil filler device. The lubricating oil in the oil containing groove 6 is supplemented through the oil injection pipe 7 by an externally connected oil injection device, so that the sufficient state of the lubricating oil can be maintained. In this embodiment, the insert 442 is moved downward in the ring slot 443, so as to squeeze the ring slot 443 to deform outwards towards one side of the piston rod 2, so that the lubricating oil at the bottom can gradually enter the contact position between the sealing ring 42 and the rod body of the piston rod 2 along the oil hole 5, thereby uniformly smearing and lubricating the rod body of the piston rod 2, and on one hand, the friction between the rod body and the cylinder body 1 and between the rod body and the sealing ring 42 are reduced, thereby reducing the abrasion degree of the sealing ring 42 and the cylinder body 1; on the other hand, in the expansion and contraction process of the piston rod 2, the sealing ring 42 deforms after being extruded by the insert block 442, so that the defect of the sealing ring 42 after being worn can be compensated, and the failure time of the sealing ring 42 can be prolonged; and lubricating oil can also be adhered to the surface of the insert 442, so that the side walls of the insert 442 and the annular incision groove 443 are lubricated, and the insert 442 moves downwards more smoothly.
The bottom of the annular slot 443 is provided with a communicated oil containing groove 6, and a space is arranged between the oil hole 5 and the oil containing groove 6. The thickness of the insert 442 gradually increases upwards, so that the side provided with the oil hole 5 is pressed to gradually incline, so that the interval between the oil hole 5 and the bottom of the groove gradually reduces until the lubricating oil in the oil containing groove 6 can enter the oil hole 5 for lubrication, thus forming the oil outlet lubrication of the lubricating oil in the outwards extending state of the piston rod 2, enabling the lubricating oil to be smeared on the outwards extending piston rod 2, and wiping the lubricating oil on the rod body and the surface of the sealing ring 42 when the piston rod 2 contracts, so as to form a uniformly smeared state, and effectively reduce abrasion when contacting with the cylinder body 1; and in a state of not lubricating in a static state, the lubricating oil can be effectively saved, and the service life of the lubricating oil is prolonged.
The inner ring of the fixed sleeve is provided with a detection assembly 11, the detection assembly 11 comprises a plurality of circumferentially distributed grooves 12, a plurality of probes 14 are elastically connected in the grooves 12 through pressing springs 13, one ends of the probes 14, which deviate from the grooves 12, are arranged into an arc-shaped structure, the other ends of the probes are fixed with extrusion rings 15, and the extrusion rings 15 are in contact with sensors 16 fixedly arranged on the side walls of the grooves 12. The detection assembly 11 is arranged to detect local pits and cracks on the rod body of the piston rod, the probe 14 is always attached to the rod body of the piston rod under the action of the abutting spring 13 in an initial state, the extrusion ring 15 keeps a normal pressure state of the sensor, once the crack or pit appears on the rod body, the probe 14 can enter the cracks and the pits, at the moment, the extrusion ring 15 moves along with the probe 14 so as to separate from the sensor, and then signals are transmitted, so that the defect at the rod body of the piston rod can be judged, the use range of the hydraulic cylinder is required to be reduced, the load is reduced so as to prevent the piston rod from being broken, and the use safety of the hydraulic cylinder can be effectively improved through the arrangement of the detection assembly 11; meanwhile, when the probe 14 extends out, the friction between the end part of the probe 14 and the rod body can be reduced by smearing the lubricating oil, so that the abrasion of the probe 14 is reduced, and the service life of the probe 14 is prolonged.
The invention has the beneficial effects that:
the invention solves the problems that in the prior art, after a period of time of use of a hydraulic oil cylinder, the piston rod 2 is easy to move unstably with the cylinder body 1 in the axial direction in the running process, so that the piston rod 2 cannot stably drive an object and the cylinder body 1 is worn; meanwhile, the leakage-proof mechanism 4 is arranged at the contact position of the cylinder body 1 and the piston rod 2, so that the leakage of hydraulic oil from the contact position of the cylinder body 1 and the piston rod 2 is prevented, and the stability of the hydraulic oil cylinder is enhanced;
the specific operation of the guide mechanism 3 is as follows: when the mounting block 35 at the end part of the piston rod 2 moves outwards, the connecting sleeve 33 is driven to synchronously move, the connecting sleeve 33 drives the connecting support plate 32 to slide outwards along the sliding rail 31, meanwhile, the telescopic rods 34 arranged in multiple sections also extend along with the connecting sleeve 33, and the plurality of telescopic rods 34 and the supporting plate 32 support and connect the connecting sleeve 33, so that the support for the extended rear end part of the piston rod 2 is formed, on one hand, the situation that the extended rear end part of the piston rod 2 is stressed and bent too much to cause abrasion due to friction with the cylinder body 1 in each telescopic movement is prevented, and the oil leakage caused by the abrasion can also be prevented; on the other hand, the multipoint support formed by the plurality of telescopic rods 34 forms the support and limit of the piston rod 2, so that the probability of axial deflection of the piston rod 2 in the telescopic process can be effectively reduced;
the piston rod 2 is extended outwards only under the action of hydraulic oil in the hydraulic oil cylinder, so that in order to reduce the situation that oil leakage occurs at the contact part of the cylinder body 1 and the piston rod 2 in the telescopic movement process of the piston rod 2, the end part of the cylinder body 1 is provided with the leakage-proof mechanism 4, and the gap between the cylinder body 1 and the piston rod 2 is filled under the action of the sealing ring 42 in the leakage-proof mechanism 4, so that the tightness between the cylinder body 1 and the piston rod 2 is enhanced; in the extending and retracting process of the piston rod 2, the sealing ring 42 can be extruded through the reinforcing component 44, so that the contact degree between the sealing ring and the piston rod 2 is enhanced, the sealing performance is further improved, and the possibility of oil leakage is reduced;
specifically, when the piston rod 2 extends outwards, the guide mechanism 3 is driven to operate, so that the push block 447 on the telescopic rod 34 moves outwards, the push block 447 extrudes the abutting piston auxiliary rod 446, so that the piston auxiliary rod 446 moves upwards, compresses hydraulic oil or air in the U-shaped cylinder 445, so that the piston auxiliary rod 446 at the other end moves downwards and presses the connected annular ring 444 to move downwards, the annular ring 444 extrudes the insert block 442 below downwards, and as the thickness of the insert block 442 gradually decreases from top to bottom, the more the insert block 442 gradually moves downwards into the annular slot 443 on the sealing ring 42, the greater the extrusion degree is for the sealing ring 42 to exceed the side of the piston rod 2, the contact tightness between the sealing ring 42 and the piston rod 2 is gradually enhanced from top to bottom, the purpose of enhancing the sealing performance of the contact part in the extension process of the piston rod 2 is achieved, the leakage-proof performance in the extension process of the piston rod 2 is further enhanced, meanwhile, the conditions of insufficient pressure and insufficient extension length caused by the hydraulic oil are reduced; the guide mechanism 3 is matched with the leakage-proof mechanism 4, so that the larger the outward extension distance of the guide mechanism 3 is, the larger the extrusion effect of the insert 442 in the matched leakage-proof mechanism 4 on the sealing ring 42 is, the larger the contact tightness between the sealing ring 42 and the rod body of the piston rod 2 is, and the better the leakage-proof effect of hydraulic oil is in positive correlation;
the insert 442 moves downwards in the annular notch groove 443, so that the annular notch groove 443 is extruded to deform outwards towards one side of the piston rod 2, lubricating oil at the bottom can gradually enter the contact position of the sealing ring 42 and the rod body of the piston rod 2 along the oil hole 5, so that the rod body of the piston rod 2 is uniformly smeared and lubricated, on one hand, friction between the rod body and the cylinder body 1 and between the rod body and the sealing ring 42 is reduced, and the abrasion degree of the sealing ring 42 and the cylinder body 1 is reduced; on the other hand, in the expansion and contraction process of the piston rod 2, the sealing ring 42 deforms after being extruded by the insert block 442, so that the defect of the sealing ring 42 after being worn can be compensated, and the failure time of the sealing ring 42 can be prolonged; the lubricating oil can also be adhered to the surface of the insert 442, so that the side walls of the insert 442 and the annular incision groove 443 are lubricated, and the insert 442 moves downwards more smoothly; the thickness of the insert 442 gradually increases upwards, so that the side provided with the oil hole 5 is pressed to gradually incline, so that the interval between the oil hole 5 and the bottom of the groove gradually reduces until the lubricating oil in the oil containing groove 6 can enter the oil hole 5 for lubrication, thus forming the oil outlet lubrication of the lubricating oil in the outwards extending state of the piston rod 2, enabling the lubricating oil to be smeared on the outwards extending piston rod 2, and wiping the lubricating oil on the rod body and the surface of the sealing ring 42 when the piston rod 2 contracts, so as to form a uniformly smeared state, and effectively reduce abrasion when contacting with the cylinder body 1; the state of not lubricating in the static state can effectively save the lubricating oil and prolong the service life of the lubricating oil;
the detection assembly 11 is arranged to detect local pits and cracks on the rod body of the piston rod, the probe 14 is always attached to the rod body of the piston rod under the action of the abutting spring 13 in an initial state, the extrusion ring 15 keeps a normal pressure state of the sensor, once the crack or pit appears on the rod body, the probe 14 can enter the cracks and the pits, at the moment, the extrusion ring 15 moves along with the probe 14 so as to separate from the sensor, and then signals are transmitted, so that the defect at the rod body of the piston rod can be judged, the use range of the hydraulic cylinder is required to be reduced, the load is reduced so as to prevent the piston rod from being broken, and the use safety of the hydraulic cylinder can be effectively improved through the arrangement of the detection assembly 11; meanwhile, when the probe 14 extends out, the friction between the end part of the probe 14 and the rod body can be reduced by smearing the lubricating oil, so that the abrasion of the probe 14 is reduced, and the service life of the probe 14 is prolonged.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.

Claims (9)

1. The hydraulic cylinder with the guide device comprises a cylinder body (1) and a piston rod (2) which is connected in the cylinder body (1) in a sliding and sealing manner, and is characterized in that a guide mechanism (3) is arranged on the cylinder body (1), and the guide mechanism (3) is used for guiding the piston rod (2); the end part of the cylinder body (1) is also provided with a leakage-proof mechanism (4), and the leakage-proof mechanism (4) is used for sealing and leakage-proof the end parts of the piston rod (2) and the cylinder body (1).
2. The hydraulic ram with a pilot device of claim 1, wherein: the guide mechanism (3) comprises:
the sliding rail (31) is fixedly arranged on the outer side wall of the cylinder body (1);
a support plate (32), the support plate (32) being slidably mounted on the slide rail (31);
the connecting sleeve (33) is fixedly connected with the supporting plate (32) through a connecting frame (36), the connecting sleeve (33) is detachably fixed on the bottom surface of the mounting block (35), and the mounting block (35) is fixed on the top of the piston rod (2);
the telescopic rods (34) are arranged, one ends of the telescopic rods (34) are fixedly connected to the bottoms of the connecting sleeves (33), the other ends of the telescopic rods are fixedly arranged on the end face of the cylinder body (1), and the telescopic rods (34) are uniformly distributed along the circumference.
3. The hydraulic cylinder with a guide device according to claim 1 or 2, characterized in that: the leakage prevention mechanism (4) comprises:
the sealing groove (41) is arranged at the contact position of the cylinder body (1) and the piston rod (2), and the sealing groove (41) is arranged in an annular shape;
a seal ring (42), wherein the seal ring (42) is embedded into the seal groove (41), and the inner surface of the seal ring (42) is contacted with the piston rod (2);
the outer ring of the reinforcing sleeve (43) is detachably fixed on the cylinder body (1) and is concentrically arranged with the piston rod (2); the inner top surface of the reinforcing sleeve (43) and the sealing groove (41) form an installation space of the sealing ring (42).
4. A hydraulic ram with a pilot device as claimed in claim 3, wherein: the leakage-proof mechanism (4) further comprises a reinforcing component (44), the reinforcing component (44) comprises an arc-shaped groove (441), two symmetrical arc-shaped grooves (441) are formed in the reinforcing sleeve (43), inserting blocks (442) are connected in the arc-shaped grooves (441) in a sliding mode, annular notch grooves (443) are formed in the sealing ring (42), and the thickness of each inserting block (442) is gradually decreased from top to bottom; the sealing ring (42) can be extruded from the annular notch groove (443) by the downward movement of the insert block (442).
5. The hydraulic ram with guide as recited in claim 4, wherein: the top of the plug block (442) is fixedly arranged on the annular ring (444), an inverted U-shaped cylinder body (445) is arranged above the annular ring (444), two sections of the U-shaped cylinder body (445) are connected with a piston auxiliary rod (446) in a sliding sealing mode, one piston auxiliary rod (446) is fixedly arranged on the annular ring (444), the other piston auxiliary rod (446) is in contact with the upper surface of the push block (447), the push block (447) is movably connected in a sliding groove (9) formed in the supporting plate (32), and a supporting spring (10) is arranged in the sliding groove.
6. The hydraulic ram with guide as recited in claim 5, wherein: the annular incision groove (443) is filled with lubricating oil, an oil hole (5) is formed in one side, facing the piston rod (2), of the annular incision groove (443), the oil hole (5) is located at one end of the annular incision groove (443) and is higher than one end, close to the piston rod (2), of the annular incision groove, and an expansion hole (8) is formed in one end, close to the piston rod (2); the oil hole (5) is used for connecting the annular incision groove (443) and a rod body of the piston rod (2).
7. The hydraulic ram with guide as recited in claim 6, wherein: the bottom of the annular incision groove (443) is provided with an oil containing groove (6) which is communicated with the bottom of the annular incision groove, and an interval is arranged between the oil hole (5) and the Rong Youcao (6).
8. The hydraulic ram with guide as recited in claim 7, wherein: the fixed sleeve is fixedly provided with an oil injection pipe (7), the bottom end of the oil injection pipe (7) is communicated with the annular incision groove (443), and the top end of the oil injection pipe is connected with an external oil injection device.
9. A hydraulic ram with a pilot device as claimed in claim 3, wherein: the inner ring of the fixed sleeve is provided with a detection assembly (11), the detection assembly (11) comprises a plurality of circumferentially distributed grooves (12), a plurality of probes (14) are elastically connected in the grooves (12) through pressing springs (13), one ends of the probes (14) deviating from the grooves (12) are arranged into an arc-shaped structure, the other ends of the probes are fixed with a squeezing ring (15), and the squeezing ring (15) is in contact with a sensor (16) fixedly arranged on the side wall of the grooves (12).
CN202310859924.6A 2023-07-12 2023-07-12 Hydraulic cylinder with guiding device Pending CN116838665A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310859924.6A CN116838665A (en) 2023-07-12 2023-07-12 Hydraulic cylinder with guiding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310859924.6A CN116838665A (en) 2023-07-12 2023-07-12 Hydraulic cylinder with guiding device

Publications (1)

Publication Number Publication Date
CN116838665A true CN116838665A (en) 2023-10-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310859924.6A Pending CN116838665A (en) 2023-07-12 2023-07-12 Hydraulic cylinder with guiding device

Country Status (1)

Country Link
CN (1) CN116838665A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117404423A (en) * 2023-12-14 2024-01-16 江苏省盐城技师学院(江苏省盐城市高级技工学校、盐城工业学校) Automobile chassis damping device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117404423A (en) * 2023-12-14 2024-01-16 江苏省盐城技师学院(江苏省盐城市高级技工学校、盐城工业学校) Automobile chassis damping device
CN117404423B (en) * 2023-12-14 2024-02-27 江苏省盐城技师学院(江苏省盐城市高级技工学校、盐城工业学校) Automobile chassis damping device

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