CN114001065A - Connecting structure of top cover and oil cylinder of hydraulic oil cylinder - Google Patents
Connecting structure of top cover and oil cylinder of hydraulic oil cylinder Download PDFInfo
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- CN114001065A CN114001065A CN202111425390.3A CN202111425390A CN114001065A CN 114001065 A CN114001065 A CN 114001065A CN 202111425390 A CN202111425390 A CN 202111425390A CN 114001065 A CN114001065 A CN 114001065A
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- top cover
- bolt
- oil cylinder
- cylinder body
- trapezoidal tooth
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- 239000003921 oil Substances 0.000 title claims abstract description 29
- 239000010720 hydraulic oil Substances 0.000 title claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 60
- 238000013016 damping Methods 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000035939 shock Effects 0.000 claims description 3
- 230000006378 damage Effects 0.000 abstract description 20
- 238000001125 extrusion Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 description 14
- 230000033001 locomotion Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
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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
- F15B15/1423—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
- F15B15/1442—End cap sealings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of hydraulic cylinders, in particular to a connecting structure of a top cover and an oil cylinder of a hydraulic oil cylinder; the cylinder body is fixedly connected with the top cover through the bolt; a groove is formed in the inner wall of the cylinder body, a first tooth-shaped block is arranged in the groove, the top cover comprises an upper top cover and a lower top cover, a spring is fixedly connected between the upper top cover and the lower top cover, a second tooth-shaped block matched with the first tooth-shaped block is arranged at the bottom end of the bolt, and a first sealing ring is arranged between the upper top cover and the lower top cover; through sealing washer extrusion deformation, thereby the sealing washer that warp promotes in the recess that No. one tooth profile piece cooperatees with No. two tooth profile pieces on the bolt and further fixes cylinder body and top cap to this reaches the pressure that shares bolt and threaded connection part received, prevents that hydraulic pressure and thermal energy in the cylinder body from to the top cap application of force too big, and then causes the harm to bolt and threaded connection part, leads to connecting difficult dismantlement or dismantlement back damage screw thread and joint department surface purpose.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a connecting structure of a top cover and an oil cylinder of a hydraulic oil cylinder.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. When the reciprocating motion is realized by using the reciprocating motion device, a speed reducing device can be omitted, no transmission gap exists, and the reciprocating motion is stable, so that the reciprocating motion device is widely applied to 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 the two sides of the effective area; the hydraulic cylinder is basically composed of a cylinder barrel, a cylinder cover, a piston rod and a sealing device.
In the prior art, the gland and the joint surface of the oil cylinder are fixed by using the threaded holes and the bolts, and the fixing mode causes damage to the connecting parts of the bolts and the threads after being influenced by factors such as hydraulic pressure, thermal expansion and the like in the oil cylinder and the top cover, so that the connection is not easy to detach or the surfaces of the threads and the joint part are damaged after detachment, and the service life of the top cover is shortened. And too big difficult dismantlement of pneumatic cylinder internal pressure when the pneumatic cylinder is dismantled, it can be ejecting by pressure to lead to the fact personnel to harm to break down pneumatic cylinder top cap and bolt with the trade.
In view of this, in order to overcome the above technical problems, a connection structure of a hydraulic cylinder top cover and a cylinder is provided, which solves the above technical problems.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder can solve the problems that after the inside of the oil cylinder and the top cover is influenced by factors such as hydraulic pressure, thermal expansion and the like, the connecting part of a bolt and a thread is damaged, the connection is not easy to disassemble, or the surface of the thread and a joint part is damaged after the disassembly, and the service life of the top cover is shortened; and when can avoid when too big pneumatic cylinder internal pressure when dismantling the pneumatic cylinder, the hydro-cylinder top cap is difficult for dismantling, and hydraulic cylinder top cap and bolt are dismantled in trade and the circumstances that can be ejecting by pressure and cause personnel's damage.
The invention provides a connecting structure of a top cover and an oil cylinder of a hydraulic oil cylinder, which comprises a cylinder body, a top cover, a bolt, a piston rod and a damping unit, wherein threaded holes with the same size and the same axis are formed in the wall of the cylinder body and the top end of the top cover, and the cylinder body and the top cover are fixedly connected through the bolt; the inner wall of the cylinder body is provided with a groove, the groove is communicated with the threaded hole, a trapezoidal tooth block is arranged in the groove, the top cover comprises an upper top cover and a lower top cover, the lower surface of the upper top cover and the upper surface of the lower top cover are respectively fixedly connected with two ends of the spring, a through hole is formed in the middle of the top cover, and a piston rod is arranged in the through hole; the bottom end of the bolt is provided with a trapezoidal tooth bolt matched with the trapezoidal tooth block, the outer surface of the trapezoidal tooth bolt is provided with a thread groove matched with the trapezoidal tooth block, the diameter of the trapezoidal tooth bolt is smaller than that of the bolt, a first sealing ring is arranged between the upper top cover and the lower top cover, and the first sealing ring is in contact with the trapezoidal tooth block; the edge of the lower top cover is provided with a second sealing ring, and the contact part of the lower top cover and the piston rod is provided with a third sealing ring.
Preferably, the first sealing ring is internally provided with a hollow structure.
Preferably, the springs are arranged uniformly and are rigid springs, and the springs are matched with the lower top cover to achieve a buffering effect.
Preferably, the shock attenuation unit includes bullet pad and circular seal, the lower surface of going up the top cap and the upper surface of lower top cap respectively with the upper and lower fixed surface connection of bullet pad, the top of bullet pad is equipped with circular seal.
Preferably, a plurality of connecting rods are fixedly connected to the lower surface of the lower top cover, a filter screen is fixedly connected to the bottom end of each connecting rod, the filter screen is connected with the inner wall of the cylinder body in a sliding mode, and the filter screen is made of a good material and has good impact resistance.
Preferably, a scraper is arranged at one end of the filter screen, which is in contact with the piston rod.
The invention has the following beneficial effects:
1. according to the connecting structure of the hydraulic cylinder top cover and the oil cylinder, when the hydraulic cylinder works, the sealing ring is extruded and deformed, the deformed sealing ring pushes the trapezoidal tooth block in the groove to be matched with the trapezoidal tooth bolt on the bolt so as to further fix the cylinder body and the top cover, so that the aims of sharing the pressure on the bolt and the threaded connecting part, preventing the excessive force applied to the top cover by the hydraulic pressure and the thermal expansion in the cylinder body, further damaging the bolt and the threaded connecting part and causing the difficulty in disassembly of connection or damaging the threads and the surface of the joint after disassembly are fulfilled; and when can avoid when too big pneumatic cylinder internal pressure when dismantling the pneumatic cylinder, the hydro-cylinder top cap is difficult for dismantling, and hydraulic cylinder top cap and bolt are dismantled in trade and the circumstances that can be ejecting by pressure and cause personnel's damage.
2. According to the connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder, the filter screen and the inclined-thorn scraper on the filter screen are arranged, so that impurities in oil in the hydraulic oil cylinder are filtered and collected, the impurities in the oil are prevented from being accumulated and blocked at the connecting part of the cylinder body, the top cover and the piston rod, the disassembly difficulty is increased, the movement of the piston rod is influenced, and the working efficiency of the hydraulic oil cylinder is reduced;
drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the internal structure of another embodiment of the present invention;
FIG. 4 is an enlarged view of the invention at B in FIG. 3;
fig. 5 is a schematic view of the structure of the filter screen of the present invention.
In the figure: the cylinder body 1, the groove 11, the trapezoidal tooth block 12, the top cover 2, the upper top cover 21, the lower top cover 22, the spring 23, the first sealing ring 24, the second sealing ring 25, the third sealing ring 26, the bolt 3, the trapezoidal tooth bolt 31, the piston rod 4, the damping unit 5, the elastic pad 51, the circular sealing ring 52, the filter screen 6 and the scraper 61.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The invention provides a connecting structure of a top cover and an oil cylinder of a hydraulic oil cylinder, which comprises a cylinder body 1, a top cover 2, a bolt 3, a piston rod 4 and a damping unit 5, wherein threaded holes with the same size are formed in the upper surface of the top end of the cylinder body 1 and the corresponding position of the top cover 2, and the cylinder body 1 and the top cover 2 are fixedly connected through the bolt 3; the inner wall of the cylinder body 1 is provided with a groove 11, the groove 11 is communicated with a threaded hole, a trapezoidal tooth block 12 is connected in the groove 11 in a sliding mode, the top cover 2 comprises an upper top cover 21 and a lower top cover 22, a damping unit 5 is arranged between the upper top cover 21 and the lower top cover 22, the damping unit 5 comprises a spring 23 and a first sealing ring 24, the lower surface of the upper top cover 21 and the upper surface of the lower top cover 22 are fixedly connected with two ends of the spring 23 respectively, the first sealing ring 24 is arranged between the upper top cover 2 and the lower top cover 22, a through hole is formed in the middle of the top cover 2, and a piston rod 4 is connected in the through hole in a sliding mode; the bottom end of the bolt 3 is fixedly connected with a trapezoidal tooth bolt 31 matched with the trapezoidal tooth block 12, a thread groove matched with the trapezoidal tooth block 12 is formed in the outer surface of the trapezoidal tooth bolt 31, the diameter of the trapezoidal tooth bolt 31 is smaller than that of the bolt 3, a first sealing ring 24 is arranged between the upper top cover 21 and the lower top cover 22, and the trapezoidal tooth block 12 is in contact with the first sealing ring 24; the edge of the lower top cover 22 is provided with a second sealing ring 25, and the contact part of the lower top cover 22 and the piston rod is provided with a third sealing ring 26.
When the hydraulic oil cylinder works, the cylinder body 1 and the top cover 3 are fixedly connected through the bolt 3; the thread groove on the surface of the trapezoidal tooth bolt 31 at the lower end of the bolt 3 is matched with the top end of the trapezoidal tooth block 12, the trapezoidal tooth block 12 is in sliding connection with the cylinder body 1, so that a gap exists between the trapezoidal tooth block 12 and the thread groove, a spring 23 is arranged between the lower top cover 22 and the upper top cover 21 to enable the lower top cover 22 and the upper top cover 21 to leave a gap, the lower top cover 22 in the cylinder body 1 is impacted by factors such as piston and thermal expansion, and therefore the first sealing ring 24 between the lower top cover 22 and the upper top cover 21 is extruded, the first sealing ring 24 is extruded and deformed, the deformed first sealing ring 24 pushes the trapezoidal tooth block 12 in the groove 11 to be tightly matched with the trapezoidal tooth bolt 31 on the bolt 3 so as to further fix the cylinder body 1 and the top cover 2, the trapezoidal tooth block 12 is matched with the trapezoidal tooth bolt 31 to share the pressure borne by the bolt 3 and the threaded connection part in the cylinder body, and prevent the hydraulic pressure and thermal expansion in the cylinder body 1 from exerting excessive force on the top cover 2, further damage is caused to the connection part of the bolt 3 and the internal thread of the cylinder body, which can cause that the connection is not easy to be disassembled or the surface of the thread and the joint is damaged after the disassembly; when the pressure in the cylinder body 1 is too large, the trapezoidal tooth block 12 is tightly matched with the trapezoidal tooth bolt 31, the top cover 2 cannot be detached, when the pressure in the cylinder body 1 is reduced, the lower top cover 22 does not extrude the first sealing ring 24, the first sealing ring 24 returns to the original state, when the hydraulic cylinder works, vibration can be generated to enable the trapezoidal tooth block 12 to be separated from the trapezoidal tooth bolt 31 to be in a tight contact state, and the top cover 2 can be detached, so that the situation that when the pressure in the hydraulic cylinder is too large during detaching the hydraulic cylinder, the top cover of the hydraulic cylinder is not easy to detach, and the top cover and the bolts of the hydraulic cylinder are accidentally detached and ejected by the pressure to cause personnel damage can be avoided; and the second sealing ring 25 that is equipped with down top cap 22 edge can prevent that impurity in the fluid from getting into in the recess 11 and then influencing the cooperation of trapezoidal tooth piece 12 and trapezoidal tooth bolt 31, and lower top cap 22 is equipped with No. three sealing ring 26 with piston rod 4 contact department and prevents that impurity in the fluid from getting into the contact site of piston rod 4 and top cap 2 and causing the heap influence piston rod 4 motion.
In an embodiment of the present invention, the first sealing ring 24 has a hollow structure inside.
When the lower top cover 22 in the cylinder body 1 is impacted by factors such as hydraulic pressure, thermal expansion and the like, the first sealing ring 24 is extruded by the lower top cover 22 and the upper top cover 21, so that the first sealing ring 24 is extruded and deformed, the first sealing ring 24 is internally provided with a hollow structure, the deformation degree of the first sealing ring 24 can be larger, the trapezoidal tooth block 12 in the groove 11 is further better pushed to be matched with the trapezoidal tooth bolt 31 on the bolt 3, and the deformation degree of the first sealing ring 24 is larger when being extruded, so that a better sealing effect can be achieved;
in one embodiment of the present invention, the spring 23 is provided in a plurality and uniformly arranged, and the spring 23 is matched with the lower top cover 22 to achieve a buffering effect.
When the lower top cover 22 is impacted by factors such as hydraulic pressure and thermal expansion in the cylinder body 1, the spring 23 of fixed connection between the upper top cover 21 and the lower top cover 22 is stressed and compressed, the spring 23 is provided with a plurality of and is uniformly arranged, and the impact of hydraulic pressure and thermal expansion can be buffered and the force is removed in the compression process, so that the impact of the top cover 2 is reduced, the damage to the top cover 2 is reduced, and the service life of the top cover 2 is prolonged.
As an embodiment of the present invention, the damping unit 5 includes an elastic pad 51 and a circular sealing ring 52, the lower surface of the upper top cover 21 and the upper surface of the lower top cover 22 are respectively fixedly connected to the upper and lower surfaces of the elastic pad 51, and the circular sealing ring 52 is disposed at the top end of the elastic pad 51.
The lower top cover 22 in the cylinder body 1 is impacted by factors such as piston and thermal expansion, so that the elastic pad 51 between the lower top cover 22 and the upper top cover 21 is extruded, the elastic pad 51 is extruded and deformed, the deformed elastic pad 51 drives the circular sealing ring 52 to push the trapezoidal tooth block 12 in the groove 11 to be tightly matched with the trapezoidal tooth bolt 31 on the bolt 3, so that the cylinder body 1 and the top cover 2 are further fixed, the trapezoidal tooth block 12 is matched with the trapezoidal tooth bolt 31 to share the pressure on the bolt 3 and the threaded connection part in the cylinder body, and the phenomenon that the hydraulic pressure and the thermal expansion in the cylinder body 1 apply excessive force on the top cover 2, further damage to the connection part of the bolt 3 and the internal thread of the cylinder body is avoided, and the connection is difficult to disassemble or the thread and the surface of the joint part are damaged after the disassembly; when the pressure in the cylinder body 1 is too large, the trapezoidal tooth block 12 is tightly matched with the trapezoidal tooth bolt 31, the top cover 2 cannot be detached, when the pressure in the cylinder body 1 is reduced, the lower top cover 22 does not extrude the elastic pad 51 any more, the elastic pad 24 and the circular sealing ring 52 return to the original state, when the hydraulic cylinder works, vibration is generated to enable the trapezoidal tooth block 12 to be separated from the trapezoidal tooth bolt 31 to be in a tight contact state, and the top cover 2 can be detached, so that the situation that when the pressure in the hydraulic cylinder is too large during detaching the hydraulic cylinder, the top cover of the hydraulic cylinder is not easy to detach, and the top cover and the bolts of the hydraulic cylinder are accidentally detached and are ejected by the pressure to cause personnel damage can be avoided; and when the lower top cover 22 in the cylinder body 1 is impacted by factors such as hydraulic pressure, thermal expansion and the like, the elastic pad 51 fixedly connected between the upper top cover 21 and the lower top cover 22 is compressed under stress, and the impact of the hydraulic pressure and the thermal expansion can be buffered and the force is removed in the compression process of the elastic pad 51, so that the impact on the top cover 2 is reduced, the damage on the top cover 2 is reduced, and the service life of the top cover 2 is prolonged.
As a specific embodiment of the present invention, a plurality of connecting rods are fixedly connected to the lower surface of the lower top cover 22, the bottom ends of the connecting rods are fixedly connected with a filter screen 6, and the filter screen 6 is slidably connected to the inner wall of the cylinder body 1. The material used for the filter screen 6 has good impact resistance.
When oil in the cylinder body 1 rolls up and down under the action of the piston rod 4, the oil passes through the filter screen 6 fixedly connected with the lower top cover 22 through the connecting rod, the filter screen 6 is arranged, impurities in the oil are reduced to be close to the joint of the top cover 2 and the cylinder body 1, the impurities in the oil are prevented from entering the groove 11 to further influence the matching of the trapezoidal tooth block 12 and the trapezoidal tooth bolt 31, excessive oil stains are prevented from being deposited at the joint of the top cover 2 and the cylinder body 1 to increase the disassembly difficulty, the filter screen 6 is made of a material with good impact resistance like MC nylon, and therefore the pressure in the cylinder body 1 and the damage of the piston to the filter screen 6 can be prevented;
in an embodiment of the present invention, a scraper 61 is disposed at one end of the filter screen 6 contacting the piston rod 4.
When the piston rod 4 moves up and down in the cylinder body 1, the scrapers 52 on the filter screen 5 have a function of clearing and collecting more impurities deposited on the piston rod 4, so that the impurities are prevented from being brought into the contact part of the piston rod 4 and the top cover 2 to cause accumulation and blockage, the movement difficulty of the piston rod 4 is increased, and the working efficiency of the hydraulic oil cylinder is reduced;
the working principle is as follows:
when the hydraulic oil cylinder works, the cylinder body 1 and the top cover 3 are fixedly connected through the bolt 3; the thread groove on the surface of the trapezoidal tooth bolt 31 at the lower end of the bolt 3 is matched with the top end of the trapezoidal tooth block 12, the trapezoidal tooth block 12 is in sliding connection with the cylinder body 1, so that a gap exists between the trapezoidal tooth block 12 and the thread groove, a spring 23 is arranged between the lower top cover 22 and the upper top cover 21 to enable the lower top cover 22 and the upper top cover 21 to leave a gap, the lower top cover 22 in the cylinder body 1 is impacted by factors such as piston and thermal expansion, and therefore the first sealing ring 24 between the lower top cover 22 and the upper top cover 21 is extruded, the first sealing ring 24 is extruded and deformed, the deformed first sealing ring 24 pushes the trapezoidal tooth block 12 in the groove 11 to be tightly matched with the trapezoidal tooth bolt 31 on the bolt 3 so as to further fix the cylinder body 1 and the top cover 2, the trapezoidal tooth block 12 is matched with the trapezoidal tooth bolt 31 to share the pressure borne by the bolt 3 and the threaded connection part in the cylinder body, and prevent the hydraulic pressure and thermal expansion in the cylinder body 1 from exerting excessive force on the top cover 2, further damage is caused to the connection part of the bolt 3 and the internal thread of the cylinder body, which can cause that the connection is not easy to be disassembled or the surface of the thread and the joint is damaged after the disassembly; when the pressure in the cylinder body 1 is too large, the trapezoidal tooth block 12 is tightly matched with the trapezoidal tooth bolt 31, the top cover 2 cannot be detached, when the pressure in the cylinder body 1 is reduced, the lower top cover 22 does not extrude the first sealing ring 24, the first sealing ring 24 returns to the original state, when the hydraulic cylinder works, vibration can be generated to enable the trapezoidal tooth block 12 to be separated from the trapezoidal tooth bolt 31 to be in a tight contact state, and the top cover 2 can be detached, so that the situation that when the pressure in the hydraulic cylinder is too large during detaching the hydraulic cylinder, the top cover of the hydraulic cylinder is not easy to detach, and the top cover and the bolts of the hydraulic cylinder are accidentally detached and ejected by the pressure to cause personnel damage can be avoided; and the second sealing ring 25 that is equipped with down top cap 22 edge can prevent that impurity in the fluid from getting into in the recess 11 and then influencing the cooperation of trapezoidal tooth piece 12 and trapezoidal tooth bolt 31, and lower top cap 22 is equipped with No. three sealing ring 26 with piston rod 4 contact department and prevents that impurity in the fluid from getting into the contact site of piston rod 4 and top cap 2 and causing the heap influence piston rod 4 motion.
In another embodiment, the lower top cover 22 inside the cylinder 1 is impacted by factors such as piston and thermal expansion, so as to extrude the elastic pad 51 between the lower top cover 22 and the upper top cover 21, so that the elastic pad 51 is extruded and deformed, the deformed elastic pad 51 drives the circular sealing ring 52 to push the trapezoidal tooth block 12 in the groove 11 to be tightly matched with the trapezoidal tooth bolt 31 on the bolt 3, so as to further fix the cylinder 1 and the top cover 2, the trapezoidal tooth block 12 is matched with the trapezoidal tooth bolt 31 to share the pressure on the bolt 3 and the threaded connection part inside the cylinder, and prevent the hydraulic pressure and the thermal expansion inside the cylinder 1 from applying too large force on the top cover 2, further damage the threaded connection part inside the bolt 3 and the cylinder, which can cause the connection to be difficult to disassemble or damage the thread and the surface of the joint after the disassembly; when the pressure in the cylinder body 1 is too large, the trapezoidal tooth block 12 is tightly matched with the trapezoidal tooth bolt 31, the top cover 2 cannot be detached, when the pressure in the cylinder body 1 is reduced, the lower top cover 22 does not extrude the elastic pad 51 any more, the elastic pad 24 and the circular sealing ring 52 return to the original state, when the hydraulic cylinder works, vibration is generated to enable the trapezoidal tooth block 12 to be separated from the trapezoidal tooth bolt 31 to be in a tight contact state, and the top cover 2 can be detached, so that the situation that when the pressure in the hydraulic cylinder is too large during detaching the hydraulic cylinder, the top cover of the hydraulic cylinder is not easy to detach, and the top cover and the bolts of the hydraulic cylinder are accidentally detached and are ejected by the pressure to cause personnel damage can be avoided; and when the lower top cover 22 in the cylinder body 1 is impacted by factors such as hydraulic pressure, thermal expansion and the like, the elastic pad 51 fixedly connected between the upper top cover 21 and the lower top cover 22 is compressed under stress, and the impact of the hydraulic pressure and the thermal expansion can be buffered and the force is removed in the compression process of the elastic pad 51, so that the impact on the top cover 2 is reduced, the damage on the top cover 2 is reduced, and the service life of the top cover 2 is prolonged.
When the lower top cover 22 in the cylinder body 1 is impacted by factors such as hydraulic pressure, thermal expansion and the like, the first sealing ring 24 is extruded by the lower top cover 22 and the upper top cover 21, so that the first sealing ring 24 is extruded and deformed, the first sealing ring 24 is internally provided with a hollow structure, the deformation degree of the first sealing ring 24 can be larger, the trapezoidal tooth block 12 in the groove 11 is further better pushed to be matched with the trapezoidal tooth bolt 31 on the bolt 3, and the deformation degree of the first sealing ring 24 is larger when being extruded, so that a better sealing effect can be achieved;
when the lower top cover 22 in the cylinder body 1 is impacted by factors such as hydraulic pressure, thermal expansion and the like, the springs 23 fixedly connected between the upper top cover 21 and the lower top cover 22 are stressed and compressed, a plurality of springs 23 are uniformly arranged, and a buffering and force-unloading effect can be realized on the impact of the hydraulic pressure and the thermal expansion in the compression process, so that the impact on the top cover 2 is reduced, the damage on the top cover 2 is reduced, and the service life of the top cover 2 is prolonged; the use of a stiff spring for spring 23 can improve the overall life of the invention.
When oil in the cylinder body 1 rolls up and down under the action of the piston rod 4, the oil passes through the filter screen 5 fixedly connected with the lower top cover 22 through the connecting rod, and by arranging the filter screen 5, impurities in the oil are reduced to be close to the joint of the top cover 2 and the cylinder body 1, the impurities in the oil are prevented from entering the groove 11 to further influence the matching of the trapezoidal tooth block 12 and the trapezoidal tooth bolt 31, and excessive oil stains are prevented from being deposited at the joint of the top cover 2 and the cylinder body 1 to increase the difficulty in dismounting;
when the piston rod 4 moves up and down in the cylinder body 1, the scrapers 52 on the filter screen 5 have a function of clearing and collecting more impurities deposited on the piston rod 4, so that the impurities are prevented from being brought into the contact part of the piston rod 4 and the top cover to cause accumulation and blockage, the movement difficulty of the piston rod 4 is increased, and the working efficiency of the hydraulic oil cylinder is reduced;
the foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a connection structure of hydraulic cylinder top cap and hydro-cylinder, includes cylinder body (1), top cap (2), bolt (3), piston rod (4) and shock attenuation unit (5), its characterized in that: threaded holes with the same size and the same axis are formed in the inner wall of the cylinder body (1) and the top end of the top cover (2), and the cylinder body (1) and the top cover (2) are fixedly connected through bolts (3); the inner wall of the cylinder body (1) is provided with a groove (11), the groove (11) is communicated with a threaded hole, a trapezoidal tooth block (12) is arranged in the groove (11), the top cover (2) comprises an upper top cover (21) and a lower top cover (22), a damping unit (5) is arranged between the upper top cover (21) and the lower top cover (22), the damping unit (5) comprises a spring (23) and a first sealing ring (24), the lower surface of the upper top cover (21) and the upper surface of the lower top cover (22) are respectively fixedly connected with two ends of the spring (23), the first sealing ring (24) is arranged between the upper top cover (2) and the lower top cover (22), the middle of the top cover (2) is provided with a through hole, and a piston rod (4) is arranged in the through hole; the bottom end of the bolt (3) is provided with a trapezoidal tooth bolt (31) matched with the trapezoidal tooth block (12), the outer surface of the trapezoidal tooth bolt (31) is provided with a thread groove matched with the trapezoidal tooth block (12), the diameter of the trapezoidal tooth bolt (31) is smaller than that of the bolt (3), and the trapezoidal tooth block (12) is in contact with the first sealing ring (24); the edge of the lower top cover (22) is provided with a second sealing ring (25), and the contact part of the lower top cover (22) and the piston rod is provided with a third sealing ring (26).
2. The connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder according to claim 1, characterized in that: the first sealing ring (24) is internally provided with a hollow structure.
3. The connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder according to claim 1, characterized in that: the springs (23) are arranged in a plurality of and uniformly, the springs (23) are rigid springs, and the springs (23) are matched with the lower top cover (22) to achieve a buffering effect.
4. The connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder according to claim 4, characterized in that: shock attenuation unit (5) are including bullet pad (51) and circular seal (52), go up the lower surface of top cap (21) and the upper surface of lower top cap (22) respectively with the upper and lower fixed surface connection of bullet pad (51), the top of bullet pad (51) is equipped with circular seal (52).
5. The connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder according to claim 1, characterized in that: the lower surface of the lower top cover (2) is fixedly connected with a plurality of connecting rods, the bottom ends of the connecting rods are fixedly connected with a filter screen (6), the filter screen (6) is connected with the inner wall of the cylinder body (1) in a sliding mode, and the filter screen (6) is made of a good material and has good impact resistance.
6. The connecting structure of the top cover and the oil cylinder of the hydraulic oil cylinder according to claim 5, characterized in that: and a scraper (61) is arranged at one end of the filter screen (6) contacted with the piston rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425390.3A CN114001065A (en) | 2021-11-27 | 2021-11-27 | Connecting structure of top cover and oil cylinder of hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111425390.3A CN114001065A (en) | 2021-11-27 | 2021-11-27 | Connecting structure of top cover and oil cylinder of hydraulic oil cylinder |
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| CN114001065A true CN114001065A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111425390.3A Pending CN114001065A (en) | 2021-11-27 | 2021-11-27 | Connecting structure of top cover and oil cylinder of hydraulic oil cylinder |
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