CN113685393A - Lifting oil cylinder with buffer structure - Google Patents
Lifting oil cylinder with buffer structure Download PDFInfo
- Publication number
- CN113685393A CN113685393A CN202110782196.4A CN202110782196A CN113685393A CN 113685393 A CN113685393 A CN 113685393A CN 202110782196 A CN202110782196 A CN 202110782196A CN 113685393 A CN113685393 A CN 113685393A
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- buffer
- piston rod
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- 239000000872 buffer Substances 0.000 title claims abstract description 81
- 230000003139 buffering effect Effects 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 230000001174 ascending effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 abstract description 9
- 230000000630 rising effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 13
- 239000000945 filler Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000007599 discharging Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 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
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—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 relates to a lifting oil cylinder with a buffer structure, which comprises a cylinder body and a piston assembly, wherein the cylinder body comprises a cylinder cover, a cylinder bottom and a cylinder barrel, the piston assembly comprises a piston and a piston rod, a buffer assembly a is arranged on the piston rod, a buffer assembly b is arranged in the cylinder barrel, the buffer assembly a comprises an oil discharge hole, an exhaust hole, a bottom hole and a liquid flowing groove, and the buffer assembly b comprises a buffer sleeve, a bottom shaft and a conical surface arranged on the inner wall of the buffer sleeve; the buffer assembly a performs deceleration buffering on a rising piston rod in a mode of compressing air volume, and the buffer assembly b performs deceleration buffering on a falling piston rod by throttling oil.
Description
Technical Field
The invention relates to the technical field of engineering vehicles, in particular to a lifting oil cylinder with a buffer structure.
Background
At present, various engineering vehicles can be seen everywhere at storage, factories, facility infrastructure and construction road sections, and different engineering vehicles have different functions, so that a lot of convenience is created for our lives, the operation time is saved, the labor intensity of workers and people is relieved, and great convenience is provided for our urban construction. The oil cylinders are arranged in various engineering vehicles and are important parts, so that the engineering vehicles in operation can be effectively damped and buffered, the loss of heavy objects to the engineering vehicles is reduced, the service life of the engineering vehicles is prolonged, more importantly, the oil cylinders can damp the engineering vehicles and ensure that the engineering vehicles can keep a stable state when in use, and the life and property safety of drivers is protected.
However, the existing engineering truck has the defects that the impact force generated by collision between a piston in an oil cylinder and a cylinder cover and a cylinder bottom when the piston is lifted and lowered, noise pollution of a working area caused by noise generated by lifting collision, large loss of the generated impact force to the oil cylinder and the like cannot be eliminated when the engineering truck is used.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a lifting oil cylinder with a buffer structure, which is provided with a cylinder body and a piston assembly, wherein the cylinder body consists of a cylinder cover, a cylinder bottom and a cylinder barrel, the piston assembly comprises a piston and a piston rod, the buffer assembly a is arranged on the piston rod, and the buffer assembly b is arranged in the cylinder barrel, so that the problems that the piston collides with the cylinder cover and the cylinder bottom when being lifted and the noise is generated, the impact force generated in the lifting process is large in the oil cylinder loss and the like in the prior art are solved.
The technical solution of the invention is as follows:
a lifting oil cylinder with a buffer structure comprises a cylinder body and a piston assembly, wherein the cylinder body comprises a cylinder cover, a cylinder bottom and a cylinder barrel, the piston assembly comprises a piston and a piston rod, a buffer assembly a is arranged on the piston rod, a buffer assembly b is arranged in the cylinder barrel, the buffer assembly a comprises an oil discharge hole and an exhaust hole which are formed in the side edge of the piston rod, a bottom hole which is formed in the bottom of the piston rod and a fluid groove which is formed in the piston and used for communicating the oil discharge hole with the bottom hole, and the buffer assembly b comprises a buffer sleeve which is arranged at the bottom of the piston, a bottom shaft which is fixedly arranged on the cylinder bottom and a conical surface which is formed in the inner wall of the buffer sleeve; the buffer assembly a performs deceleration buffer on the rising piston rod in a mode of compressing air volume, and the buffer assembly b performs deceleration buffer on the falling piston rod by throttling oil.
Preferably, a shaft sealing ring and a dust ring are arranged between the cylinder cover and the piston rod, an O-shaped ring is arranged between the cylinder cover and the cylinder barrel, and the piston divides the cylinder barrel into a rod cavity and a rodless cavity.
Preferably, an oil discharge assembly is arranged in the piston, and the oil discharge assembly comprises an oil discharge pipe, a valve sleeve arranged at the tail end of the oil discharge pipe, a valve core and a spring arranged in the valve sleeve, and a baffle plate and a clamp spring arranged at the tail end of the valve sleeve.
Preferably, a support ring and a hole sealing ring are arranged between the piston and the inner wall of the cylinder barrel.
Preferably, a steel wire retaining ring a is arranged between the piston and the piston rod.
Preferably, a steel wire retaining ring b is arranged between the buffer sleeve and the piston.
Preferably, the upper end of the bottom shaft is provided with a bevel opening.
Preferably, the cylinder barrel is further provided with an oil filling hole, and the oil filling hole is internally provided with a combined pad and a screw.
The invention has the beneficial effects that:
1. the invention is provided with a cylinder body and a piston assembly, the cylinder body comprises a cylinder cover, a cylinder bottom and a cylinder barrel, the piston assembly comprises a piston and a piston rod, a buffer assembly a is arranged on the piston rod, a buffer assembly b is arranged in the cylinder barrel, the buffer assembly a comprises an oil discharge hole and an exhaust hole which are arranged on the side edge of the piston rod, a bottom hole which is arranged on the bottom of the piston rod and a fluid bath which is arranged in the piston and is used for communicating the oil discharge hole and the bottom hole, the buffer assembly b comprises a buffer sleeve which is arranged at the bottom of the piston, a bottom shaft which is fixedly arranged on the cylinder bottom and a conical surface which is arranged on the inner wall of the buffer sleeve, the piston divides the cylinder barrel into a rod cavity and a rodless cavity, air and oil in the rod cavity enter the bottom hole through the oil discharge hole during the rising process of the piston rod, the air returns to the rod cavity from the exhaust hole again, the piston rod continues to rise, and the air can not be discharged from the bottom hole after the exhaust hole is sealed by the cylinder cover, fluid continues to get into the bottom hole through the oil drain hole and produces the impact force to the air in the bottom hole, the air in the bottom hole absorbs the impact force through the mode of compression volume, slow down the speed that the piston rod rises, the piston rod is at the decline in-process, the cushion collar moves down to cooperate the fluid extrusion discharge of no pole intracavity with the bottom shaft along with the piston, the conical surface makes the in-process that the cushion collar moved down, the oil extraction passageway is narrow and small gradually, produce the throttle effect, slow down the piston rod falling speed, each subassembly is mutually supported when having solved among the prior art hydro-cylinder piston lift with the cylinder cap, the impact force that collides at the bottom of the cylinder and produce the noise and the lift in-process produces is to the great scheduling problem of hydro-cylinder loss.
2. The oil discharging assembly is arranged, when the piston rod rises, when excessive oil in the rod cavity enters the bottom hole, the pressure in the rod cavity is excessive, the oil discharging assembly can be opened in one direction, the excessive oil enters the oil discharging pipe under pressure and is discharged through the valve core, under the condition that the pressure is normal, the snap spring seals the tail end of the valve core through the retaining sheet, the piston rod can be buffered and decelerated under normal pressure, the oil discharging assembly is arranged, the oil quantity can be intelligently adjusted and controlled according to the pressure change in the rod cavity, the piston rod can be buffered and decelerated, and the cylinder body can be protected by adjusting the oil quantity.
3. According to the invention, the oil filling hole is formed in the cylinder barrel, so that oil can be more conveniently supplemented to the rod cavity, the combined pad and the screw are arranged in the oil filling hole, when oil needs to be supplemented, the rod cavity can be filled with oil through the oil filling hole by turning the loose screw, and after the oil is filled, the combined pad can well seal the oil filling hole by turning the tight screw, so that the oil in the rod cavity can not flow backwards due to pressure when the oil cylinder works, and can not flow out of the oil filling hole, and the oil can be conveniently supplemented to the rod cavity and can be prevented from flowing backwards due to the arrangement of the oil filling hole.
In conclusion, the piston lifting device has the advantages of being good in noise reduction effect when the piston is lifted, capable of reducing impact force generated in the lifting process of the piston better and capable of adjusting and controlling the amount of oil liquid according to the pressure in the cylinder barrel, and is particularly suitable for the technical field of engineering vehicles.
Drawings
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic structural view of a lifting cylinder with a buffer structure;
FIG. 2 is a schematic cross-sectional view of the rear end of the cylinder;
FIG. 3 is an enlarged view of the buffer assembly a shown at A in FIG. 2;
FIG. 4 is a schematic structural view of a rodless cavity, a support ring, and a hole seal ring;
FIG. 5 is a schematic structural view of a seal ring, a dust seal, an O-ring and a filler hole;
FIG. 6 is a schematic view of the oil drain assembly;
fig. 7 is a schematic structural diagram of the buffer assembly b.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely explained by combining the attached drawings.
Example one
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 to 7, a lifting cylinder with a buffer structure includes a cylinder body 1 and a piston assembly 2, the cylinder body 1 includes a cylinder cover 11, a cylinder bottom 12 and a cylinder barrel 13, the piston assembly 2 includes a piston 21 and a piston rod 22 with one end fixedly disposed on the piston 21, the piston rod 22 is provided with a buffer assembly a3, the cylinder barrel 13 is internally provided with a buffer assembly b4, the buffer assembly a3 includes an oil discharge hole 31 and an exhaust hole 32 disposed at a side of the piston rod 22, a bottom hole 33 disposed at a bottom of the piston rod 22 and a fluid groove 34 disposed inside the piston 21 for communicating the oil discharge hole 31 and the bottom hole 33, the buffer assembly b4 includes a buffer sleeve 41 disposed at a bottom of the piston 21, a bottom shaft 42 fixedly disposed on the cylinder bottom 12 and a conical surface 43 disposed on an inner wall of the buffer sleeve 41; the buffer assembly a3 decelerates and buffers the ascending piston rod 22 by compressing the air volume, the buffer assembly b4 decelerates and buffers the descending piston rod 22 by throttling the oil, during the ascending process of the piston rod 22, air and oil liquid flow through the oil discharge hole 31 through the liquid flow groove 34 and then enter the bottom hole 33 through the liquid flow groove 34, the air is discharged from the bottom hole 33 through the exhaust hole 32, then the piston rod 22 continuously rises, the cylinder cover 11 seals the exhaust hole 32, the oil liquid is continuously injected into the bottom hole 33 and generates impact force on the air in the bottom hole 33, the air remained in the bottom hole 33 absorbs the impact force through the compression volume to slow down the rising speed of the piston rod 22, when the piston rod 22 descends, the buffer sleeve 41 is matched with the bottom shaft 42 to extrude and discharge oil, and the conical surface 43 controls the flow velocity to buffer and decelerate the descending piston rod 22 by throttling the discharged oil.
It should be noted that, in the present embodiment, a cylinder 1 and a piston assembly 2 are provided, the cylinder 1 includes a cylinder cover 11, a cylinder bottom 12 and a cylinder 13, the piston assembly 2 includes a piston 21 and a piston rod 22, a buffer assembly a3 is provided on the piston rod 22, a buffer assembly b4 is provided in the cylinder 13, the buffer assembly a3 includes an oil discharge hole 31 and an air discharge hole 32 provided at a side of the piston rod 22, a bottom hole 33 provided at a bottom of the piston rod 22, and a fluid groove 34 provided inside the piston 21 for communicating the oil discharge hole 31 and the bottom hole 33, the buffer assembly b4 includes a buffer sleeve 41 provided at a bottom of the piston 21, a bottom shaft 42 fixedly provided on the cylinder bottom 12, and a tapered surface 43 provided on an inner wall of the buffer sleeve 41, the piston 21 divides the cylinder 13 into a rod chamber 5 and a rodless chamber 6, during the rising of the piston rod 22, air and fluid in the rod chamber 5 enter the bottom hole 33 through the oil discharge hole 31, and the air returns to the rod chamber 5 from the air discharge hole 32, the piston rod 22 continues to rise, after the cylinder cover 11 seals the exhaust hole 32, air cannot be discharged from the bottom hole 33, oil continues to enter the bottom hole 33 through the oil discharge hole 31 to generate impact force on the air in the bottom hole 33, the air in the bottom hole 33 absorbs the impact force in a volume compression mode, the rising speed of the piston rod 22 is reduced, the buffer sleeve 41 moves downwards along with the piston 21 to be matched with the bottom shaft 42 to extrude and discharge the oil in the rodless cavity 6 in the descending process of the piston rod 22, the conical surface 43 enables the oil discharge channel to be gradually narrow and small in the descending process of the buffer sleeve 41, a throttling effect is generated, the descending speed of the piston rod 22 is reduced, and the problems that in the prior art, when the piston 22 in the oil cylinder rises and falls, the impact force generated by collision with the cylinder cover 11 and the cylinder bottom 12 generates noise, the loss of the oil cylinder in the ascending and descending process is large in impact force generated by the mutual cooperation of all components are solved.
As shown in fig. 1 and 5, a shaft sealing ring 14 and a dust ring 15 are arranged between a cylinder cover 11 and a piston rod 22, an O-ring 16 is arranged between the cylinder cover 11 and the cylinder barrel 13, the piston 21 divides the cylinder barrel 13 into a rod cavity 5 and a rodless cavity 6, the dust ring 15 effectively prevents dust impurities in a working area from entering the rod cavity 5 through a gap, the operation of the piston rod 22 is affected, the shaft sealing ring 14 enables the piston rod 22 to be more attached to the cylinder cover 11 in the lifting process, oil is prevented from flowing out, and the O-ring 16 effectively prevents oil from leaking from a connector between the cylinder cover 11 and the cylinder barrel 13.
As shown in fig. 2 and 6, an oil discharge assembly 7 is disposed inside the piston 21, the oil discharge assembly 7 includes an oil discharge pipe 71, a valve sleeve 72 disposed at a rear end of the oil discharge pipe 71, a valve core 73 and a spring 74 disposed in the valve sleeve 72, a baffle 75 disposed at a rear end of the valve sleeve 72, and a snap spring 76, when the pressure in the rod chamber 5 is too high, the baffle 75 is separated from the seal of the valve core 73 under the action of the pressure, the oil in the bottom hole 33 enters the valve core 73 through the oil discharge pipe 71 to be discharged, and when the pressure returns to a normal value, the baffle 75 is reset under the action of the snap spring 76.
It should be further noted that, in this embodiment, the oil discharge assembly 7 is provided, when the piston rod 22 is in the ascending process, when too much oil in the rod cavity 5 enters the bottom hole 33, the pressure in the rod cavity 5 is too large, the oil discharge assembly 7 is opened in a single direction, so that the excessive oil is pressed into the oil discharge pipe 71 and is discharged through the valve core 73, under the condition that the pressure is normal, the snap spring 76 seals the tail end of the valve core 73 with the baffle 75, the piston rod 22 can be buffered and decelerated under the normal pressure, and the oil discharge assembly 7 is provided, so that the oil amount can be intelligently regulated and controlled according to the pressure change in the rod cavity 5 inside the oil cylinder, and the cylinder body 1 can be protected by regulating the oil amount while the piston rod 22 is buffered and decelerated.
As shown in fig. 4, a support ring 23 and a hole sealing ring 24 are arranged between the piston 21 and the inner wall of the cylinder 13, and the hole sealing ring 24 can well isolate the rod chamber 5 from the rod-free chamber 6, so as to prevent oil in the rod chamber 5 from mixing with oil in the rod-free chamber 6.
As shown in fig. 3, a wire retainer a25 is provided between the piston 21 and the piston rod 22, so that the piston 21 and the piston rod 22 can be better connected to avoid the piston rod 22 from falling off.
As shown in fig. 7, a wire retainer b44 is disposed between the buffer sleeve 41 and the piston 21, so that the buffer sleeve 41 always follows the piston 21 to prevent the buffer sleeve 41 from being dislocated during the movement.
In addition, the upper end of the bottom shaft 42 is provided with the bevel opening 45, the bevel opening 45 can be better matched with the buffer sleeve 41, and the oil liquid throttling effect is more obvious.
Example two
As shown in fig. 1 and 5, wherein the same or corresponding components as in the first embodiment are designated by the same reference numerals as in the first embodiment, only the points of difference from the first embodiment will be described below for the sake of convenience; the second embodiment is different from the first embodiment in that: the cylinder barrel 13 is further provided with an oil filling hole 8, a combined gasket 81 and a screw 82 are arranged in the oil filling hole 8, and the combined gasket 81 can effectively seal the oil filling hole 8 after the screw 82 is screwed down, so that oil leakage is prevented.
Here, this embodiment is provided with tank filler sleeve 8 on cylinder 13, can be more convenient to there being pole chamber 5 to supply fluid, still set up combination pad 81 and screw 82 in tank filler sleeve 8, when needs supply fluid, through changeing loose screw 82 to refuel in having pole chamber 5 through tank filler sleeve 8, after the completion refuels, change tight screw 82 and make combination pad 81 can carry out better sealed to tank filler sleeve 8, make the hydro-cylinder at the during operation, there is the fluid in pole chamber 5 can not take place the refluence because of pressure, flow from tank filler sleeve 8, set up tank filler sleeve 8 and both made things convenient for to there being pole chamber 5 to supply fluid, can prevent the fluid refluence again.
Working process
Buffering and decelerating process in the ascending state of the piston 21: when the oil cylinder starts to work, in the process that the piston rod 22 rises along with the piston 21, air and oil in the rod cavity 5 enter the liquid discharge groove 34 through the oil discharge hole 31, then enter the bottom hole 33 through the liquid discharge groove 34, the air entering the bottom hole 33 returns to the rod cavity 5 through the exhaust hole 32 again, after the piston rod 22 continues to rise, after the exhaust hole 32 is sealed by the cylinder cover 11, the oil in the rod cavity 5 continues to flow into the bottom hole 33, impact force is generated on the air reserved in the bottom hole 33, and the air in the bottom hole 33 absorbs the impact force through a volume compression mode to buffer and decelerate the rising piston rod 22.
Buffering deceleration process in the descending state of the piston 21: the buffer sleeve 41 descends along with the piston 21, the oil in the rodless cavity 6 is extruded and discharged by matching with the bottom shaft 42, the oil way is smooth in the initial stage of extrusion, the oil is rapidly discharged, when the conical surface 43 of the inner wall of the buffer sleeve 41 moves downwards, the oil way space between the conical surface 43 and the bottom shaft 42 is smaller and smaller, the throttling effect on the oil is more and more obvious, the oil discharging speed is slowed down, the flow is gradually reduced, and the descending piston rod 22 is buffered and decelerated.
When the pressure in the rod cavity 5 is too high: when the pressure in the rod cavity 5 is too high, the blocking piece 75 is separated from blocking the tail end of the valve core 73 under the action of the pressure, then oil in the rod cavity 5 enters the valve core 73 through the oil discharge pipe 71 under the action of the pressure and is discharged outwards, the pressure in the rod cavity 5 is reduced, and the normal speed reduction and buffering of the piston rod 22 are ensured.
In the description of the present invention, it is to be understood that the terms "front-back", "left-right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or component must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the invention.
Of course, in this disclosure, those skilled in the art will understand that the terms "a" and "an" should be interpreted as "at least one" or "one or more," i.e., in one embodiment, a number of an element may be one, and in another embodiment, a number of the element may be plural, and the terms "a" and "an" should not be interpreted as limiting the number.
The present invention is not limited to the above-described embodiments, and it should be noted that various changes and modifications can be made by those skilled in the art without departing from the structure of the present invention, and these changes and modifications should be construed as the scope of the present invention, which does not affect the effect and practicality of the present invention.
Claims (8)
1. The utility model provides a take buffer structure's play to rise hydro-cylinder, includes cylinder body (1) and piston assembly (2), cylinder body (1) is including cylinder cap (11), cylinder bottom (12) and cylinder (13), piston assembly (2) are including piston (21) and piston rod (22), its characterized in that: the oil drain cylinder is characterized in that a buffer component a (3) is arranged on the piston rod (22), a buffer component b (4) is arranged in the cylinder barrel (13), the buffer component a (3) comprises an oil drain hole (31) and an exhaust hole (32) which are formed in the side edge of the piston rod (22), a bottom hole (33) which is formed in the bottom of the piston rod (22) and a fluid groove (34) which is formed in the piston (21) and used for communicating the oil drain hole (31) with the bottom hole (33), and the buffer component b (4) comprises a buffer sleeve (41) which is formed in the bottom of the piston (21), a bottom shaft (42) which is fixedly arranged on the cylinder bottom (12) and a conical surface (43) which is formed in the inner wall of the buffer sleeve (41); the buffer assembly a (3) performs deceleration buffering on the ascending piston rod (22) in a mode of compressing air volume, and the buffer assembly b (4) performs deceleration buffering on the descending piston rod (22) by throttling oil.
2. The lifting oil cylinder with the buffer structure as claimed in claim 1, wherein a shaft seal ring (14) and a dust ring (15) are arranged between the cylinder cover (11) and the piston rod (22), an O-ring (16) is arranged between the cylinder cover (11) and the cylinder barrel (13), and the piston (21) divides the cylinder barrel (13) into the rod cavity (5) and the rodless cavity (6).
3. The lifting cylinder with the buffer structure as claimed in claim 1, wherein an oil discharge assembly (7) is arranged inside the piston (21), and the oil discharge assembly (7) comprises an oil discharge pipe (71), a valve sleeve (72) arranged at the tail end of the oil discharge pipe (71), a valve core (73) and a spring (74) arranged in the valve sleeve (72), a baffle plate (75) arranged at the tail end of the valve sleeve (72) and a snap spring (76).
4. The lifting cylinder with the buffer structure as claimed in claim 1, wherein a support ring (23) and a hole sealing ring (24) are arranged between the piston (21) and the inner wall of the cylinder barrel (13).
5. The lifting cylinder with the buffer structure as claimed in claim 1, wherein a steel wire retaining ring a (25) is arranged between the piston (21) and the piston rod (22).
6. The lifting cylinder with the buffer structure as claimed in claim 1, wherein a steel wire retaining ring b (44) is arranged between the buffer sleeve (41) and the piston (21).
7. The lifting cylinder with the buffer structure as claimed in claim 1, wherein the upper end of the bottom shaft (42) is provided with a bevel (45).
8. The lifting oil cylinder with the buffer structure as claimed in claim 1, wherein the cylinder barrel (13) is further provided with an oil filling hole (8), and a combined pad (81) and a screw (82) are arranged in the oil filling hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782196.4A CN113685393B (en) | 2021-07-12 | 2021-07-12 | Lifting oil cylinder with buffer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110782196.4A CN113685393B (en) | 2021-07-12 | 2021-07-12 | Lifting oil cylinder with buffer structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113685393A true CN113685393A (en) | 2021-11-23 |
| CN113685393B CN113685393B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110782196.4A Active CN113685393B (en) | 2021-07-12 | 2021-07-12 | Lifting oil cylinder with buffer structure |
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| JP2000027916A (en) * | 1998-07-15 | 2000-01-25 | Smc Corp | Cushion mechanism of cylinder |
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| WO2013120380A1 (en) * | 2012-02-14 | 2013-08-22 | 宁波亚德客自动化工业有限公司 | Throttling and buffering integrated structure of air cylinder |
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| CN106946192A (en) * | 2017-05-10 | 2017-07-14 | 蚌埠液力机械有限公司 | Fork truck lifting oil cylinder with New Buffering structure |
| CN208778389U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of reach oil cylinder front and back buffer structure |
| CN208778390U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of dump ram front and back buffer structure |
| CN208778392U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of lift oil tank lifting buffering structure |
-
2021
- 2021-07-12 CN CN202110782196.4A patent/CN113685393B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000027916A (en) * | 1998-07-15 | 2000-01-25 | Smc Corp | Cushion mechanism of cylinder |
| EP1435461A1 (en) * | 2002-12-30 | 2004-07-07 | Bosch Rexroth Teknik AB | Pneumatic cylinder with cushioning means |
| JP2004263844A (en) * | 2003-03-04 | 2004-09-24 | Yanagisawa Seiki Mfg Co Ltd | Ram cylinder |
| WO2013120380A1 (en) * | 2012-02-14 | 2013-08-22 | 宁波亚德客自动化工业有限公司 | Throttling and buffering integrated structure of air cylinder |
| CN205823794U (en) * | 2016-06-30 | 2016-12-21 | 蚌埠液力机械有限公司 | There is the lift oil tank of New Buffering structure |
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| CN208778389U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of reach oil cylinder front and back buffer structure |
| CN208778390U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of dump ram front and back buffer structure |
| CN208778392U (en) * | 2018-10-12 | 2019-04-23 | 杭州先力液压机械有限公司 | A kind of lift oil tank lifting buffering structure |
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| CN113685393B (en) | 2024-02-23 |
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