CN108278244B - Hydraulic cylinder for discharging device - Google Patents
Hydraulic cylinder for discharging device Download PDFInfo
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- CN108278244B CN108278244B CN201810276491.0A CN201810276491A CN108278244B CN 108278244 B CN108278244 B CN 108278244B CN 201810276491 A CN201810276491 A CN 201810276491A CN 108278244 B CN108278244 B CN 108278244B
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- cylinder body
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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
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1414—Characterised by the construction of the motor unit of the straight-cylinder type with non-rotatable piston
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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
- F15B15/1457—Piston rods
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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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- 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
- F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention belongs to an actuating element in a hydraulic system, and particularly discloses a hydraulic cylinder for a discharging device, which comprises a cylinder body, wherein a piston and a piston rod are arranged in the cylinder body; an upper oil inlet channel and a lower oil inlet channel are arranged on the cylinder body; an outer cylinder is arranged outside the cylinder body, an oil duct is arranged between the cylinder body and the outer cylinder, and an annular sliding plate is connected in the oil duct in a sliding manner; a telescopic rod is arranged in the lower oil cavity, and the upper end of the telescopic rod is connected with the annular sliding plate; the upper part of the cylinder body is provided with a one-way oil discharge valve, the lower part of the cylinder body is connected with an oil pipe, and the oil pipe is provided with a one-way oil inlet valve; a concave cavity is formed in the piston rod, a plunger is connected in the concave cavity in a sliding mode, and a spring is connected between the plunger and the piston rod; the upper part of the piston rod is sleeved with an air bag; the upper part of the cylinder body is provided with a sleeve, and the piston rod penetrates through the sleeve; a rigid corrugated pipe is connected between the piston and the bottom of the cylinder body, and a connecting pipe is connected on the cylinder body. By using the technical scheme, the problem that the workpiece is damaged by overlarge impact force suddenly caused by the fact that the hydraulic cylinder stretches out at an excessively high speed can be effectively solved.
Description
Technical Field
The invention belongs to an actuating element in a hydraulic system, and particularly relates to a hydraulic cylinder for a discharging device.
Background
The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion), has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, and 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 and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device.
In industrial production, since the hydraulic cylinder can make linear reciprocating motion, the hydraulic cylinder is usually used in a discharging device. The existing discharging device generally comprises a conveyor belt and a hydraulic cylinder arranged at the radial position of the conveyor belt, and the hydraulic cylinder pushes out a processed workpiece from the conveyor belt by operating the hydraulic cylinder so as to achieve the purpose of discharging. When the pneumatic cylinder released the conveyer belt with the work piece, the stretching out speed of pneumatic cylinder piston rod should not be too fast, especially to fragile article such as glass, avoids the work piece to receive too big impact force suddenly and takes place to damage. However, the reduction of the driving speed can cause the extension of the driving and return cycles of the hydraulic oil cylinder, which leads to the reduction of the discharging efficiency and can not well meet the requirements of the process production.
Disclosure of Invention
The invention aims to provide a hydraulic cylinder for a discharging device, which aims to solve the problem that a workpiece is damaged by sudden overlarge impact force due to the fact that the hydraulic cylinder is too fast in extension speed.
In order to achieve the purpose, the basic scheme of the invention is as follows: the hydraulic cylinder for the discharging device comprises a cylinder body, wherein the two ends of the cylinder body are respectively a cylinder bottom and a cylinder head; a piston and a piston rod are arranged in the cylinder body, one end of the piston rod is fixed with the piston, and the other end of the piston rod extends out of the cylinder head; the piston divides the cylinder body into a rod cavity and a rodless cavity, and the cylinder body is provided with an upper oil inlet channel communicated with the rod cavity and a lower oil inlet channel communicated with the rodless cavity; the method is characterized in that: an outer cylinder is arranged outside the cylinder body, an oil duct is arranged between the cylinder body and the outer cylinder, and an annular sliding plate which divides the oil duct into an upper oil cavity and a lower oil cavity is connected in the oil duct in a sliding mode; a telescopic rod with a cavity is arranged in the lower oil cavity, and the upper end of the telescopic rod is connected with the annular sliding plate; the upper part of the cylinder body is provided with a one-way oil discharge valve which can be communicated with the rod cavity and the upper oil cavity, the lower part of the cylinder body is connected with an oil pipe which can be communicated with the rodless cavity and the upper oil cavity, and the oil pipe is provided with a one-way oil inlet valve; a concave cavity is formed in the piston rod, a plunger with the lower part positioned below the piston is connected in the concave cavity in a sliding mode, and a spring is connected between the plunger and the piston rod; the upper part of the piston rod is sleeved with an air bag, and the piston rod is provided with a through hole for communicating the concave cavity with the air bag; the upper part of the cylinder body is provided with a sleeve with an opening at the upper end and a funnel-shaped section, and the piston rod passes through the sleeve; a rigid corrugated pipe is connected between the piston and the bottom of the cylinder body, and a connecting pipe for communicating the rigid corrugated pipe with the cavity of the telescopic rod is connected to the cylinder body.
The working principle of the basic scheme is as follows: when a workpiece needs to be pushed out of the conveyor belt by using a hydraulic cylinder, hydraulic oil is introduced into the downward oil inlet channel, the piston and the piston rod move upwards along the cylinder body under the pushing action of the hydraulic oil, meanwhile, the plunger also receives the acting force exerted by the hydraulic oil, overcomes a part of acting force exerted by the spring and slides upwards for a certain distance along the concave cavity, the plunger extrudes gas in the concave cavity, the air bag expands due to the fact that the concave cavity is communicated with the air bag, and when the piston rod pushes the workpiece, the air bag has a protection effect on the workpiece and buffers the stress between the workpiece and the piston rod. In the process that the piston moves upwards, the piston stretches the rigid corrugated pipe, so that the volume of the rigid corrugated pipe is continuously increased, the pressure in the rigid corrugated pipe is reduced, the rigid corrugated pipe is communicated with the cavity of the telescopic rod, the pressure in the cavity of the telescopic rod is reduced, the telescopic rod is compressed under the action of pressure difference, and the telescopic rod drives the annular sliding plate to slide downwards along the oil duct. The annular slide board slides down, and the pressure that oils the intracavity reduces, and one-way fuel inlet valve is opened, and the hydraulic oil of rodless intracavity can get into the intracavity that oils through oil pipe. In the process of introducing hydraulic oil into the rodless cavity through the lower oil inlet channel, part of the hydraulic oil in the rodless cavity is discharged through the oil pipe, the upward movement speed of the piston is low, and the extending speed of the piston rod of the hydraulic cylinder is effectively controlled. After a piston rod of the hydraulic cylinder pushes the workpiece out of the conveying belt, hydraulic oil is introduced into the upward oil inlet channel, and the lower piston and the piston rod are driven to move downwards along the cylinder body. When the piston moves downwards, pressure is applied to the rigid corrugated pipe, the rigid corrugated pipe is compressed, gas in the rigid corrugated pipe enters a cavity of the telescopic rod through the connecting pipe, the telescopic rod is stretched, and the telescopic rod drives the annular sliding plate to slide upwards along the oil duct. The annular slide plate extrudees the hydraulic oil in the upper oil cavity, and the pressure increase in the oil cavity, one-way oil drain valve are opened, and the hydraulic oil in the oil cavity gets into there is the pole chamber through one-way oil drain valve, and hydraulic oil gets into there is the pole chamber from last oil inlet channel and one-way oil drain valve simultaneously this moment for the descending speed of piston is accelerated. Piston and piston rod continue down, the upper portion of piston rod moves near the sleeve, the plunger on the piston rod contacts with the bottom of cylinder body this moment, the bottom of cylinder body exerts ascending effort to the plunger, make the plunger overcome the effort of spring and further stretch into in the cavity, the plunger further extrudes the gas in the cavity, make the gasbag continue the inflation, the gasbag of inflation contacts with telescopic inner wall, under the hindrance of gasbag, piston rod and piston continue descending speed and slow down, avoid the impact force between piston and the cylinder body bottom too big and lead to the cylinder body to damage.
The beneficial effect of this basic scheme lies in:
1. by using the hydraulic cylinder in the scheme, the extension speed of the piston rod of the hydraulic cylinder is low, so that the workpiece is prevented from being damaged due to sudden overlarge impact force caused by overhigh extension speed of the piston rod; during the return stroke, the retraction speed of the hydraulic cylinder is increased, and the reduction of the discharging efficiency caused by the overlong return stroke period is avoided.
2. The piston can collide with the bottom of the cylinder body in the reciprocating motion process, if the impact force is too large, the piston and the cylinder body are easily damaged, and in the scheme, the plunger and the spring are arranged to buffer the impact between the piston and the cylinder body for one time; and the gasbag contacts with the sleeve inner wall after expanding, and the gasbag has restricted piston rod and the descending speed of piston, avoids the impact force between piston and the cylinder body bottom too big, is equivalent to have the secondary cushioning effect to the impact between piston and the cylinder body. And the two times of buffering effectively avoids the occurrence of damage between the piston and the bottom of the cylinder body due to overlarge impact force.
3. When the piston rod of the hydraulic cylinder pushes the processed workpiece out of the conveyor belt, the air bag expands to a certain degree, and the air bag has a protection effect on the workpiece and can buffer the stress between the workpiece and the piston rod.
Furthermore, the telescopic rod comprises a fixed rod and a sliding rod which is connected to the fixed rod in a sliding manner, and cavities are formed in the fixed rod and the sliding rod; the annular sliding plate is fixed at the upper end of the sliding rod. The telescopic rod has simple structure and easy regulation of telescopic length.
Furthermore, the inner wall of the piston rod is provided with a limiting groove communicated with the concave cavity, and the plunger is provided with a bulge clamped with the limiting groove. The setting of spacing groove has restricted the motion of plunger for the plunger can only be in fixed position activity, and the range of avoiding the plunger to follow piston rod upward movement is too big, extrudes the gas in the cavity, and leads to the gasbag excessive inflation, reduces the risk of gasbag explosion.
Furthermore, the limiting grooves are two and are uniformly distributed along the circumferential direction of the piston rod. The two limiting grooves are arranged to enable the plunger plate to move more stably.
Further, a sealing ring attached to the inner wall of the cylinder body is arranged on the piston. The setting of sealing washer can increase the leakproofness of cylinder body, avoids hydraulic oil to reveal and leaks.
Further, a cushion pad is adhered to the bottom of the plunger. When the plunger collides with the bottom of the cylinder body, the cushion pad can buffer the stress between the plunger and the cylinder body, and the plunger and the cylinder body are prevented from being damaged.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a hydraulic cylinder for a discharge device according to the present invention;
fig. 2 is a schematic structural view of an embodiment of the hydraulic cylinder for the discharging device of the invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numerals in figures 1 to 2 of the specification include: the oil cylinder comprises a cylinder body 10, an upper oil inlet channel 11, a lower oil inlet channel 12, a one-way oil discharge valve 13, an outer cylinder 20, an annular sliding plate 21, a fixed rod 22, a sliding rod 23, a piston rod 30, a cavity 31, a through hole 32, an air bag 33, a sleeve 40, a piston 50, a rigid corrugated pipe 60, a connecting pipe 61, an oil pipe 70, a one-way oil inlet valve 71, a plunger 80 and a spring 81.
As shown in fig. 1 and 2, the hydraulic cylinder for the discharging device includes a cylinder body 10, a cylinder bottom and a cylinder head are respectively disposed at two ends of the cylinder body 10, a piston 50 is slidably and hermetically connected in the cylinder body 10, and a sealing ring attached to an inner wall of the cylinder body 10 is fixed on a side portion of the piston 50. The piston 50 is fixed with a piston rod 30, and the other end of the piston rod 30 extends out of the cylinder head. A cavity 31 is formed in the piston rod 30, a plunger 80 is connected in the cavity 31 in a sliding and sealing mode, and a cushion pad is adhered to the lower surface of the plunger 80; a spring 81 is connected between the upper surface of the plunger 80 and the inner wall of the piston rod 30, and the lower portion of the plunger 80 can be extended out of the piston 50 by the urging force of the spring 81. The inner wall of piston rod 30 is opened has two spacing grooves that all distribute along the direction of height, and two spacing grooves are along piston rod 30's circumference evenly distributed, are fixed with the arch with the spacing groove block on the plunger 80. The limiting groove limits the movement of plunger 80 so that plunger 80 can only move in a fixed position, and when plunger 80 moves to an upper limit position, plunger 80 can be completely placed in cavity 31. The upper part of the piston rod 30 is sleeved with an air bag 33, a through hole 32 is formed in the piston rod 30, and the cavity 31 is communicated with the air bag 33 through the through hole 32. The upper part of the cylinder body 10 is welded with a sleeve 40 with an open upper end and a funnel-shaped section, and the piston rod 30 can freely pass through the sleeve 40. The piston 50 divides the cylinder body 10 into a rod cavity and a rodless cavity, an upper oil inlet channel 11 and a lower oil inlet channel 12 are formed in the cylinder body 10, the upper oil inlet channel 11 is communicated with the rod cavity, and the lower oil inlet channel 12 is communicated with the rodless cavity. The outer cylinder 20 is arranged outside the cylinder body 10, an oil channel is arranged between the cylinder body 10 and the outer cylinder 20, an annular sliding plate 21 is connected in the oil channel in a sliding and sealing mode, the oil channel is divided into an upper oil cavity and a lower oil cavity by the annular sliding plate 21, and the upper oil cavity is close to one side of the cylinder head. The telescopic rod is welded in the lower oil cavity and comprises a fixed rod 22 and a sliding rod 23, cavities are formed in the fixed rod 22 and the sliding rod 23, the sliding rod 23 is connected in the fixed rod 22 in a sliding mode, and the annular sliding plate 21 is welded at the upper end of the sliding rod 23. The upper portion of cylinder body 10 is equipped with one-way oil drain valve 13 that can communicate there is the pole chamber with last oil pocket, and when the pressure increase in the last oil pocket, one-way oil drain valve 13 opened, and the hydraulic oil in the last oil pocket can get into there is the pole chamber through one-way oil drain valve 13. The lower part of the cylinder body 10 is connected with an oil pipe 70, one end of the oil pipe 70 is communicated with the rodless cavity, and the other end of the oil pipe 70 is communicated with the upper oil cavity; the oil pipe 70 is provided with a one-way oil inlet valve 71, when the pressure in the upper oil cavity is reduced, the one-way oil inlet valve 71 is opened, and the hydraulic oil in the rodless cavity can enter the upper oil cavity through the oil pipe 70. A rigid bellows 60 is connected between the piston 50 and the bottom of the cylinder 10, a connection pipe 61 is connected to the lower portion of the cylinder 10, one end of the connection pipe 61 is communicated with the rigid bellows 60, and the other end is communicated with the cavity of the fixing rod 22.
The specific implementation process is as follows: when a hydraulic cylinder is needed to push a workpiece out of a conveyor belt, hydraulic oil is introduced into the downward oil inlet channel 12, the piston 50 and the piston rod 30 move upwards along the cylinder body 10 under the pushing action of the hydraulic oil, meanwhile, the plunger 80 is also under the action force exerted by the hydraulic oil, the plunger 80 overcomes a part of action force exerted by the spring 81 and slides upwards for a certain distance along the concave cavity 31, the plunger 80 extrudes gas in the concave cavity 31, the concave cavity 31 is communicated with the air bag 33, the air bag 33 expands, and when the piston rod 30 pushes the workpiece, the air bag 33 has a protection effect on the workpiece, and the stress between the workpiece and the piston rod 30 is buffered. In the process that the piston 50 moves upwards, the piston 50 stretches the rigid corrugated pipe 60, so that the volume of the rigid corrugated pipe 60 is continuously increased, the pressure in the rigid corrugated pipe 60 is reduced, the pressure in the cavity of the telescopic rod is reduced due to the fact that the rigid corrugated pipe 60 is communicated with the cavity of the telescopic rod, the telescopic rod is compressed under the action of the pressure difference, and the telescopic rod drives the annular sliding plate 21 to slide downwards along the oil channel. The annular slide plate 21 slides downwards, the pressure in the upper oil cavity is reduced, the one-way oil inlet valve 71 is opened, and the hydraulic oil in the rodless cavity can enter the upper oil cavity through the oil pipe 70. In the process of introducing hydraulic oil into the rodless cavity through the lower oil inlet channel 12, part of the hydraulic oil in the rodless cavity is discharged through the oil pipe 70, the upward speed of the piston 50 is slow, and the extending speed of the rod 30 of the hydraulic cylinder piston 50 is effectively controlled. After the piston rod 30 of the hydraulic cylinder pushes the workpiece out of the conveyor belt, hydraulic oil is introduced into the upper oil inlet channel 11, and the lower piston 50 and the piston rod 30 are driven to move downwards along the cylinder body 10. When the piston 50 moves downwards, pressure is applied to the rigid corrugated pipe 60, so that the rigid corrugated pipe 60 is compressed, gas in the rigid corrugated pipe 60 enters a cavity of the telescopic rod through the connecting pipe 61, the telescopic rod is stretched, and the telescopic rod drives the annular sliding plate 21 to slide upwards along the oil channel. Annular slide 21 extrudes the hydraulic oil in the upper oil chamber, and the pressure increase in the upper oil chamber, one-way oil drain valve 13 is opened, and the hydraulic oil in the upper oil chamber has the pole chamber through one-way oil drain valve 13 entering, and this moment hydraulic oil gets into from last oil inlet channel 11 and one-way oil drain valve 13 simultaneously and has the pole chamber for the speed that piston 50 descends accelerates. The piston 50 and the piston rod 30 continue to descend, the upper portion of the piston rod 30 moves to the vicinity of the sleeve 40, at the moment, the plunger 80 on the piston rod 30 is in contact with the bottom of the cylinder 10, the bottom of the cylinder 10 exerts an upward acting force on the plunger 80, the plunger 80 overcomes the acting force of the spring 81 and further extends into the cavity 31, the plunger 80 further presses the gas in the cavity 31, the airbag 33 continues to expand, the expanded airbag 33 is in contact with the inner wall of the sleeve 40, the descending speed of the piston rod 30 and the piston 50 is slowed down under the obstruction of the airbag 33, and the damage to the cylinder 10 caused by the overlarge impact force between the piston 50 and the bottom of the cylinder 10 is avoided.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The hydraulic cylinder for the discharging device comprises a cylinder body, wherein the two ends of the cylinder body are respectively a cylinder bottom and a cylinder head; a piston and a piston rod are arranged in the cylinder body, one end of the piston rod is fixed with the piston, and the other end of the piston rod extends out of the cylinder head; the piston divides the cylinder body into a rod cavity and a rodless cavity, and the cylinder body is provided with an upper oil inlet channel communicated with the rod cavity and a lower oil inlet channel communicated with the rodless cavity; the method is characterized in that: an outer cylinder is arranged outside the cylinder body, an oil duct is arranged between the cylinder body and the outer cylinder, and an annular sliding plate which divides the oil duct into an upper oil cavity and a lower oil cavity is connected in the oil duct in a sliding mode; a telescopic rod with a cavity is arranged in the lower oil cavity, and the upper end of the telescopic rod is connected with the annular sliding plate; the upper part of the cylinder body is provided with a one-way oil discharge valve which can be communicated with the rod cavity and the upper oil cavity, the lower part of the cylinder body is connected with an oil pipe which can be communicated with the rodless cavity and the upper oil cavity, and the oil pipe is provided with a one-way oil inlet valve; a concave cavity is formed in the piston rod, a plunger with the lower part positioned below the piston is connected in the concave cavity in a sliding mode, and a spring is connected between the plunger and the piston rod; the upper part of the piston rod is sleeved with an air bag, and the piston rod is provided with a through hole for communicating the concave cavity with the air bag; the upper part of the cylinder body is provided with a sleeve with an opening at the upper end and a funnel-shaped section, and the piston rod passes through the sleeve; a rigid corrugated pipe is connected between the piston and the bottom of the cylinder body, and a connecting pipe for communicating the rigid corrugated pipe with the cavity of the telescopic rod is connected to the cylinder body.
2. The hydraulic cylinder for a discharge device of claim 1, wherein: the telescopic rod comprises a fixed rod and a sliding rod which is connected to the fixed rod in a sliding manner, and cavities are formed in the fixed rod and the sliding rod; the annular sliding plate is fixed at the upper end of the sliding rod.
3. The hydraulic cylinder for a discharge device of claim 1, wherein: the inner wall of the piston rod is provided with a limiting groove communicated with the concave cavity, and the plunger is provided with a bulge clamped with the limiting groove.
4. The hydraulic cylinder for a discharge device of claim 3, wherein: the limiting grooves are two and are uniformly distributed along the circumferential direction of the piston rod.
5. The hydraulic cylinder for a discharge device of claim 1, wherein: the piston is provided with a sealing ring which is attached to the inner wall of the cylinder body.
6. The hydraulic cylinder for a discharge device of claim 1, wherein: the bottom of the plunger is stuck with a buffer pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276491.0A CN108278244B (en) | 2018-03-30 | 2018-03-30 | Hydraulic cylinder for discharging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810276491.0A CN108278244B (en) | 2018-03-30 | 2018-03-30 | Hydraulic cylinder for discharging device |
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| CN108278244A CN108278244A (en) | 2018-07-13 |
| CN108278244B true CN108278244B (en) | 2020-03-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108637754A (en) * | 2018-07-17 | 2018-10-12 | 重庆辉海科技有限公司 | Motorcycle auto parts machinery punch device |
| CN110848201A (en) * | 2019-11-19 | 2020-02-28 | 衡阳市林肯液压设备有限公司 | Seal-ring-free hydraulic cylinder adopting oil-water medium |
| CN110864026A (en) * | 2019-11-21 | 2020-03-06 | 衡阳市林肯液压设备有限公司 | Buffering hydraulic cylinder with good sealing performance |
| CN112108599A (en) * | 2020-08-19 | 2020-12-22 | 孙路涵 | Large-tonnage cold forging hydraulic press |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1144268A (en) * | 1966-09-07 | 1969-03-05 | Paschke Hanns Dieter | Fluid operated apparatus for producing reciprocatory movement |
| SU1541425A1 (en) * | 1988-05-03 | 1990-02-07 | Воронежское высшее военное авиационное инженерное училище | Accumulating pneumatic cylinder |
| JPH094606A (en) * | 1995-06-21 | 1997-01-07 | Ishikawajima Harima Heavy Ind Co Ltd | Air cylinder device used in liquid |
| CN203868027U (en) * | 2014-06-10 | 2014-10-08 | 吕金昌 | Pneumatic pipe hole positioning cylinder |
| CN205331109U (en) * | 2015-10-29 | 2016-06-22 | 重庆迎瑞升压铸有限公司 | Quick detach cylinder for die casting machine |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
-
2018
- 2018-03-30 CN CN201810276491.0A patent/CN108278244B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1144268A (en) * | 1966-09-07 | 1969-03-05 | Paschke Hanns Dieter | Fluid operated apparatus for producing reciprocatory movement |
| SU1541425A1 (en) * | 1988-05-03 | 1990-02-07 | Воронежское высшее военное авиационное инженерное училище | Accumulating pneumatic cylinder |
| JPH094606A (en) * | 1995-06-21 | 1997-01-07 | Ishikawajima Harima Heavy Ind Co Ltd | Air cylinder device used in liquid |
| CN203868027U (en) * | 2014-06-10 | 2014-10-08 | 吕金昌 | Pneumatic pipe hole positioning cylinder |
| CN205331109U (en) * | 2015-10-29 | 2016-06-22 | 重庆迎瑞升压铸有限公司 | Quick detach cylinder for die casting machine |
| CN107676331A (en) * | 2017-10-31 | 2018-02-09 | 重庆维庆液压机械有限公司 | A kind of hydraulic jack for being used to discharge |
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| Publication number | Publication date |
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| CN108278244A (en) | 2018-07-13 |
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