CN104704248A - Hydraulic cylinder - Google Patents
Hydraulic cylinder Download PDFInfo
- Publication number
- CN104704248A CN104704248A CN201380052248.6A CN201380052248A CN104704248A CN 104704248 A CN104704248 A CN 104704248A CN 201380052248 A CN201380052248 A CN 201380052248A CN 104704248 A CN104704248 A CN 104704248A
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- Prior art keywords
- mentioned
- room
- hydraulic cylinder
- oil hydraulic
- cylinder body
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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
- F15B15/1428—Cylinders
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7052—Single-acting output members
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/864—Failure of an output member, e.g. actuator or motor failure
Abstract
A single-acting hydraulic cylinder (1) is retracted by the pressure of operating liquid guided from a hydraulic pressure source to a rod-side chamber (6) which is one of the rod-side chamber (6) and a bottom-side chamber (5), which are separated by a piston (40). The single-acting hydraulic cylinder (1) is provided with: a cylinder tube (10) in which the piston (40) is received in a slidable manner and which has therein the rod-side chamber (6) and the bottom-side chamber (5); a piston rod (20) which is connected to the piston (40) and which protrudes to the outside from the cylinder tube (10); a tank chamber (7) which connects to the bottom-side chamber (5); a filling port (26) which is used to fill the bottom-side chamber (5) or the tank chamber (7) with a lubricating liquid from the outside; and a sealing section (14) for sealing the filling port (26).
Description
Technical field
The present invention relates to the single-action type oil hydraulic cylinder that a kind of pressurized operation liquid by importing from outside hydraulic power carries out contraction work.
Background technique
As this single-action type oil hydraulic cylinder, the inside of the cylinder body of the oil hydraulic cylinder disclosed in Japanese JP08-135609A is separated into the 2nd grease chamber and air chamber by main piston.
2nd grease chamber is communicated in outside hydraulic power via pipe arrangement.Oil hydraulic cylinder carries out contraction work because the pressure being imported into the working solution of the 2nd grease chamber raises, and on the other hand, if the pressure of working solution reduces, then oil hydraulic cylinder carries out elongation work under the effect of the external force of spring etc.
Air chamber is by air hole and ft connection.When oil hydraulic cylinder carries out flexible work, outside air to be come in and gone out air chamber by air hole.
About the oil hydraulic cylinder disclosed in Japanese JP08-135609A, because air chamber is communicated in outside by air hole, therefore inferior in work halted state situation about continuing for a long time, air chamber is dry sometimes, and the working solution of air chamber becomes dry.If the working solution in air chamber becomes dry, then internal rust, the piston seal being located in main piston is fixed and is attached at the internal face of cylinder body.If piston seal is attached at the internal face of cylinder body, then there is the piston seal when again operating and be out of shape and the sealing of piston seal this problem impaired.
Summary of the invention
The object of the present invention is to provide and a kind ofly prevent internal rust and prevent piston seal from fixing and be attached at the single-action type oil hydraulic cylinder of the internal face of cylinder body.
According to a certain mode of the present invention, a kind of oil hydraulic cylinder is provided, it guides in self-hydraulic source the single-action type oil hydraulic cylinder carrying out contraction work under by the effect of the pressure of the working solution in the bar side room in the separated bar side room of piston and room, bottom side, wherein, this oil hydraulic cylinder comprises: the cylinder body of tubular, it accommodates piston in the mode slid freely, and has bar side room and room, bottom side in inside; Piston seal, it is located in piston, and is slidingly contacted at the internal face of cylinder body; Piston rod, it is linked to piston, and externally gives prominence to from cylinder body; Vessel, it is communicated in room, bottom side; Fill port, it is for filling Lubricants from externally to room, bottom side or vessel; And closure part, its shutoff fill port.
Accompanying drawing explanation
Fig. 1 is the sectional view of the oil hydraulic cylinder of the 1st mode of execution of the present invention.
Fig. 2 is the sectional view of the oil hydraulic cylinder of the 2nd mode of execution of the present invention.
Fig. 3 is the sectional view of the oil hydraulic cylinder of the 3rd mode of execution of the present invention.
Embodiment
Below, with reference to accompanying drawing, embodiments of the present invention are described.
(the 1st mode of execution)
Oil hydraulic cylinder (oil hydraulic cylinder) 1 shown in Fig. 1 is such as installed on the working truck (omit diagram) carrying out mowing, and is used as actuator that mowing machine (mowing rotor) is elevated.In addition, be not limited to the actuator being installed on working truck, also can be used in the actuator being located at other machineries, equipment.
Mechanism's (omitting diagram) that mowing machine is elevated comprising: vehicle body side arm, and it is linked to vehicle body; Mowing machine side arm, it is rotatably linked to vehicle body side arm, and supports mowing machine; Spring 2, its sense of rotation declined to mowing machine exerts a force to mowing machine side arm; And oil hydraulic cylinder 1, its sense of rotation risen to mowing machine drives mowing machine side arm.
Oil hydraulic cylinder 1 is linked between the vehicle body side arm of working truck and mowing machine side arm.Oil hydraulic cylinder 1 carries out flexible work, thus mowing machine side arm rotates, and mowing machine is elevated.
Below, the structure of oil hydraulic cylinder 1 is described.Reduce if oil hydraulic cylinder 1 is the pressure carrying out contraction work working solution under the effect of the pressure of the working solution imported at the hydraulic power from outside, the spring force (external force) by spring 2 carries out the oil hydraulic cylinder of the single-action type of elongation work.
Oil hydraulic cylinder 1 comprises: cylindric cylinder body 10, and it accommodates piston 40 in the mode slid freely; And piston rod 20, it is externally given prominence to from cylinder body 10.
Base (bottom block) 50 is combined with in one end of cylinder body 10.Base 50 has a bracket (eye bracket) portion 51, and is linked to vehicle body side arm by the pin be inserted in a bracket part 51 (omitting diagram).
Being fitted together to the cylinder cap 60 being combined with ring-type at the other end of cylinder body 10, utilizing cylinder cap 60 to support piston rod 20 for sliding freely.
Be formed in the tip portion of piston rod 20 and have a bracket part 21.Piston rod 20 is linked to mowing machine side arm by the pin be inserted in a bracket part 21 (omitting diagram).
Piston 40 is fastened with by nut 49 at the base end part of the piston rod 20 be inserted in cylinder body 10.O type ring 8 is folded with between the base end part periphery and the inner circumferential of piston 40 of piston rod 20.Utilize between this O type ring 8 packed-piston bar 20 and piston 40.
The space of the inner side of cylinder body 10 is separated into bar side room 6 and room, bottom side 5 by piston 40.Bar side room 6 is the spaces between cylinder body 10 and piston rod 20, and division is formed between piston 40 and cylinder cap 60.Room, bottom side 5 is spaces of the inner side of cylinder body 10, and division is formed between piston 40 and base 50.
Cylinder body 10 is such as formed by metals such as steel.
Piston seal 41 is folded with in the periphery of piston 40.By making piston seal 41 contact with the internal face 11 of cylinder body 10, thus between sealing room, bottom side 5 and bar side room 6.
Piston seal 41 is formed by low friction resin material, but is not limited thereto, and also can use the O type ring etc. of rubber.
Cylindric lining (bearing) 61 is folded with in the inner circumferential of cylinder cap 60.Utilize this lining 61 that piston rod 20 is supported on cylinder cap 60 in the mode slid freely.
Primary seal 62 and the dust seal 63 of the outer circumferential face being slidingly contacted at piston rod 20 is folded with in the inner circumferential of cylinder cap 60.Utilize primary seal 62 to seal between cylinder cap 60 and piston rod 20, make bar side room 6 relative to Exterior capsule.In addition, dust seal 63 is utilized to prevent entering of dust etc.
Be combined with the port part 30 of ring-type by weld part 31 in the axial periphery halfway of cylinder body 10.Be formed for the supply and discharge port 32 relative to bar side room 6 supply and discharge working solution at port part 30.The pipe arrangement extended from the not shown hydraulic power being installed on operating vehicle is connected with at supply and discharge port 32.Working solution by hydraulic power supply and discharge is come in and gone out supply and discharge port 32 as shown by arrows in FIG. like that.
Cylindric outer tube 35 is set up between port part 30 and cylinder cap 60.The supply and discharge path 33 in the space as cylindrical shape is marked off between outer tube 35 and cylinder body 10.
If the working hydraulic pressure that self-hydraulic source imports rises, then working solution is such as shown by arrows in FIG. passes through supply and discharge path 33 from supply and discharge port 32, and the through hole 12 that idiomorphism is formed in cylinder body 10 is supplied to bar side room 6.Under the effect of this working hydraulic pressure, piston rod 20 relative to cylinder body 10 centrally axes O move to right direction in figure, thus oil hydraulic cylinder 1 carries out contraction work.Fig. 1 illustrates the state that oil hydraulic cylinder 1 at utmost shrinks.
On the other hand, if the working hydraulic pressure that self-hydraulic source imports reduces, then piston rod 20 moves to the left direction in figure relative to cylinder body 10 based on the active force of spring 2, and oil hydraulic cylinder 1 carries out elongation work.When carrying out this elongation work, the working solution in bar side room 6 is as shown by arrows in FIG. like that by through hole 12, supply and discharge path 33, supply and discharge port 32 and discharging to hydraulic power.
In oil hydraulic cylinder 1, use oil as the working solution of self-hydraulic source supply and discharge, but also can displace oil and use the working solutions such as such as water-soluble replacement liquid.
One end of outer tube 35 is embedded in port part 30, and utilizes weld part 34 to combine.The other end of outer tube 35 screws togather and is incorporated into the screw section, periphery of cylinder cap 60.
O type ring 64 is folded with between outer tube 35 and cylinder cap 60.Utilize between this O type ring 64 sealed outer pipe 35 and cylinder cap 60, make supply and discharge path 33 relative to Exterior capsule.
Spiral helicine spring engagement groove 36 is formed in the periphery of outer tube 35.Spring 2 is formed as helical, and one end of spring 2 is wound in spiral helicine spring engagement groove 36, thus is linked to outer tube 35.The other end of spring 2 is linked to the tip side of piston rod 20.Piston rod 20 exerts a force to the direction outstanding from cylinder body 10 by spring 2 under the effect of its spring force.
Oil hydraulic cylinder 1 possesses the container tube 25 configured round cylinder body 10 between port part 30 and base 50.Vessel 7 is provided with between cylinder body 10 and container tube 25.
The through hole 13 be communicated with vessel 7 room, bottom side 5 is formed at cylinder body 10.As shown in Figure 1, even if through hole 13 also can not by the position opening of piston 40 shutoff being in stroke end at piston rod 20, under state that oil hydraulic cylinder 1 is at utmost contraction state.
Vessel 7 divides and is formed as cylindric space between container tube 25 and cylinder body 10.Base 50 and port part 30 become the wall portion of the ring-type dividing the axial two ends forming vessel 7.
The admissible value of the pressure produced according to the room, bottom side 5 when oil hydraulic cylinder 1 carries out flexible work and at random set the volume ratio of vessel 7 and room, bottom side 5.According to the volume of the internal diameter determination vessel 7 of container tube 25.
Base 50 have be linked to vehicle body side arm have a bracket part 51 and round the lip part 52 having ring-type that a bracket part 51 is outstanding.
Chimeric recess 53 is formed at the middle position of the radial direction of the end face of the lip part 52 of base 50.Cylinder body 10 is fixed with at chimeric recess 53.
Chimeric recess 54 is formed in the outer fix of the radial direction of the end face of the lip part 52 of base 50.In chimeric chimeric one end having container tube 25 of recess 54, and weld part 43 is utilized to combine.The other end of container tube 25 is fitted together to the chimeric recess 39 being formed at port part 30, and utilizes weld part 42 to combine.
Oil hydraulic cylinder 1 comprises and runs through container tube 25 and to the fill port 26 of vessel 7 opening and the closure part 14 of shutoff fill port 26.
Closure part 14 comprises: filling tube 15, and it is incorporated into the periphery of container tube 25 by weld part 16; Adjustment screw 17, it is screwed together in filling tube 15; And ball 18, it is pressed on the inner peripheral surface of the taper of filling tube 15 by adjusting screw 17.Be formed towards the exhaust port 19 of opening between adjustment screw 17 and ball 18 in filling tube 15.In addition, closure part 14 is not limited to said structure, such as, also can be the drain plug (key) of the fill port 26 being screwed together in container tube 25.
When manufacturing oil hydraulic cylinder 1, from fill port 26, the Lubricants of prearranging quatity is filled into vessel 7.This Lubricants employs the oil identical relative to the working solution of oil hydraulic cylinder 1 supply and discharge with self-hydraulic source.In addition, Lubricants is not limited thereto, and also can use the Lubricants different from working solution.
The oil hydraulic cylinder 1 manufactured is assembled between the vehicle body side arm of working truck and mowing machine side arm together with spring 2.
When working truck operates, if oil hydraulic cylinder 1 becomes the state of at utmost shrinking shown in Fig. 1, then mowing machine side arm rotates upward, becomes the state making mowing machine remain on lifting position.
When making mowing machine near ground when making oil hydraulic cylinder 1 extend work, the working hydraulic pressure utilizing the operation of driver to make self-hydraulic source be directed to the bar side room 6 of oil hydraulic cylinder 1 reduces.Thus, oil hydraulic cylinder 1 carries out elongation work under the effect of the spring force of spring 2, and the working solution in bar side room 6 is by through hole 12, supply and discharge path 33, supply and discharge port 32 and flowing out to hydraulic power.
In addition, the spring force that oil hydraulic cylinder 1 is not limited to by spring 2 carries out elongation work, such as, also can make the structure that the external force such as the gravity by applying mowing machine side arm carry out elongation work.When the gravity applied mowing machine side arm is larger, the structure that the spring force that also can do paired mowing machine side arm force application spring 2 rotates to the direction of rising to make mowing machine.
When making mowing machine leave ground when making oil hydraulic cylinder 1 carry out contraction work, the working hydraulic pressure that the operation self-hydraulic source by driver is directed to oil hydraulic cylinder 1 raises.Thus, working solution is by supply and discharge port 32, supply and discharge path 33, through hole 12 and flow into bar side room 6, and the spring force that oil hydraulic cylinder 1 overcomes spring 2 carries out contraction work.
When oil hydraulic cylinder 1 carries out flexible work like this, the sliding contacting part of the Lubricants being present in room, bottom side 5 to the internal face 11 of piston 40 and cylinder body 10 lubricates.Thus, piston 40 slides swimmingly.
Due to room, bottom side 5 by closure part 14 relative to Exterior capsule, therefore along with piston 40 slides, the volume enlargement of room, bottom side 5 reduces, the pressure lifting of room, bottom side 5.Because room, bottom side 5 is communicated in vessel 7 by through hole 13, the volume enlargement therefore along with room, bottom side 5 reduces, the gas discrepancy vessel 7 of room, bottom side 5.Therefore, the pressure oscillation 7 that room, bottom side 5 produces slows down.Thus, the negative pressure that oil hydraulic cylinder 1 can suppress room, bottom side 5 to produce when the work of elongation raises, and the spring force of spring 2 can be leaned on to carry out elongation work swimmingly.In addition, the malleation that oil hydraulic cylinder 1 can suppress room, bottom side 5 to produce when the work of contraction raises, and the pressure of the working solution born by piston 40 carries out contraction work swimmingly.
Fill port 26 by closure part 14 shutoff, thus room, bottom side 5 and vessel 7 airtight relative to outside.Therefore, it is possible to the Lubricants preventing room, bottom side 5 dry, inner becomes dry, and can prevent moisture, dust etc. from entering room, bottom side 5 from outside.Thus, can prevent the internal face 11 of cylinder body 10 from getting rusty.Therefore, it is possible to prevent piston seal 41 from fixing and be attached at the internal face 11 of cylinder body 10.In addition, the antirust treatment that the internal face 11 of cylinder body 10 is implemented can also be cancelled.In addition, inhibit the durability required by piston seal 41 to reduce, the selected scope of piston seal 41 can be expanded.
When keeping working truck, oil hydraulic cylinder 1 is set to the longest elongation state, becomes the posture that central axis O tilts relative to substantially horizontal, room, bottom side 5 is lower than bar side room 6.Under the state that oil hydraulic cylinder 1 obtains this keeping posture, set the loading of Lubricants in the mode be dipped at least partially in the Lubricants being present in room, bottom side 5 of piston seal 41.
Even if when long-time keeping working truck, because a part for piston seal 41 is dipped in Lubricants, therefore, it is possible to prevent piston seal 41 dry and fix and be attached at the internal face 11 of cylinder body 10.Thus, after being taken care of for a long time, when running, piston seal 41 can be suppressed to be attached at the internal face 11 of cylinder body 10 and to be out of shape at working truck.In addition, can prevent the working solution being supplied to bar side room 6 from spilling to room, bottom side 5 via piston seal 41.
When working truck operates, oil hydraulic cylinder 1 carries out flexible work, slides relative to cylinder body 108 along with piston 40, causes micro-working solution to produce sometimes and leaks to the slip of room, bottom side 5 movement from bar side room 6.Leak owing to producing this slip, the lubrication liquid measure being present in room, bottom side 5 or vessel 7 may exceed set amount and increase.Now, fill port 26 can be opened via closure part 14 when maintaining, unnecessary Lubricants is externally discharged by fill port 26.In addition, by unclamping adjustment screw 17 a little, thus ball 18 leaves the inner peripheral surface of the taper of filling tube 15, the air of room, bottom side 5 or Lubricants externally can be discharged from exhaust port 19 by fill port 26.
According to the operating conditions of oil hydraulic cylinder 1, the lubrication liquid measure being present in room, bottom side 5 may be less than set amount a little.Now, opening fill port 26 when maintaining via closure part 14, from outside, Lubricants being added to vessel 7 by fill port 26.
Such as when maintaining, when supplemental lubrication liquid, oil hydraulic cylinder 1 being configured to its central axis O and extending along vertical and become the state (posture) that piston rod 20 extends from the cylinder cap 60 of cylinder body 10 upward.In this condition, when the Lubricants of set amount is filled in room, bottom side 5, the position opening that the liquid level of the Lubricants of fill port 26 in container tube 25 arrives.That is, the position that the liquid level of Lubricants fill port 26 is located at the Lubricants being filled with set amount in room, bottom side 5 arrives.Like this, according to when being to maintain when supplemental lubrication liquid the loading (amount preset) of the posture (posture preset) that obtains of oil hydraulic cylinder 1 and Lubricants determine the position of fill port 26 openings of container tube 25.
When being to maintain from fill port 26 supplemental lubrication liquid when, under the state that oil hydraulic cylinder 1 obtains the posture that central axis O extends along vertical, worker, from fill port 26 supplemental lubrication liquid, is overflowed from vessel 7 at Lubricants and before vessel 7 overflows, stops supplemental lubrication liquid from the moment that fill port 26 externally flows out or horse back.The mode arrived near fill port 26 with the liquid level of Lubricants like this regulates magnitude of recruitment, thus is easy to the Lubricants of room, bottom side 5 being filled to set amount.
In addition, such as, in the large-scale oil hydraulic cylinder being located at fork truck etc., the one-way valve in redundant work liquid (Lubricants) the back bar side room making room, bottom side can be set.But, in contrast to this, in small-sized oil hydraulic cylinder 1, the space that this one-way valve is set can not be guaranteed.Oil hydraulic cylinder 1 is tackled the valve members such as the one-way valve not possessing supply and discharge working solution between bar side room 6 and room, bottom side 5 and is provided with fill port 26 and closure part 14.Thereby, it is possible to enclose appropriate Lubricants to room, bottom side 5.
According to the 1st above mode of execution, play following effect.
In oil hydraulic cylinder 1, utilize the slide part of the Lubricants lube pistons 40 being filled into room, bottom side 5 from fill port 26.Fill port 26 is by closure part 14 shutoff, thus room, bottom side 5 is airtight relative to outside.Thereby, it is possible to prevent Lubricants from becoming dry and internal rust, prevent piston seal 41 from fixing and be attached at the internal face 11 of cylinder body 10.In addition, the antirust treatment that the internal face 11 of cylinder body 10 is implemented can also be cancelled.In addition, the durability required by piston seal 41 can be suppressed to reduce, the selected scope of expansion piston seal 41.
In oil hydraulic cylinder 1, possess the container tube 25 configured round cylinder body 10, and be provided with vessel 7 between cylinder body 10 and container tube 25, the internal diameter therefore by changing container tube 25 at random can set the volume ratio of vessel 7 and room, bottom side 5.
In oil hydraulic cylinder 1, be combined with the port part 30 guided relative to the ring-type of the working solution of bar side room 6 supply and discharge in the periphery of cylinder body 10, the end of container tube 25 is combined with port part 30.Therefore, it is possible at the spatial placement vessel 7 round cylinder body 10 adjacent with port part 30, vessel 7 is utilized to inhibit the maximization of oil hydraulic cylinder 1.
In oil hydraulic cylinder 1, the container tube 25 that outer tube 35 and the division of division formation supply and discharge path 33 form vessel 7 arranges round cylinder body 10 across port part 30, is linked with the spring 2 exerted a force to shrinkage direction by oil hydraulic cylinder 1 at outer tube 35.Therefore, it is possible to configure spring 2 along outer tube 35, spring 2 is utilized to inhibit larger-scale unit.
In oil hydraulic cylinder 1, possess the base 50 of the open end of shutoff cylinder body 10, be formed with the lip part 52 be combined with the end of container tube 25 at base 50.Therefore, it is possible to utilize common base 50 to divide form room, bottom side 5 and vessel 7, inhibit the increase of the number of components forming oil hydraulic cylinder 1.In addition, the rigidity of base 50 is improved by combining the container tube 25 thicker than cylinder body 10 at base 50.
(the 2nd mode of execution)
Next, with reference to Fig. 2, the 2nd mode of execution of the present invention is described.Below, be described centered by the point different from above-mentioned 1st mode of execution, identical reference character marked to the structure identical with the oil hydraulic cylinder of above-mentioned 1st mode of execution and omits the description.
In the oil hydraulic cylinder 1 of above-mentioned 1st mode of execution, be formed with the lip part 52 be combined with the end of container tube 25 at base 50.On the other hand, in the oil hydraulic cylinder 101 of the 2nd mode of execution, be different from base 150 ground in the periphery of cylinder body 10 in conjunction with the external component 110 of ring-type and be combined with the structure this point of the end of container tube 125 at this external component 110 different from the oil hydraulic cylinder 1 of the 1st mode of execution adopting.
The end of cylinder body 10 utilizes weld part 151 to be incorporated into the periphery of base 150.Base 150 is linked to vehicle body side arm by pin (omitting diagram).
External component 110 utilizes weld part 109 to be incorporated into the periphery of cylinder body 10.External component 110 is formed as the ring-type in L-shaped cross section, and is formed as the open-ended through hole 13 of not shutoff at cylinder body 10.
Outer tube 35 is set up between port part 130 and cylinder cap 60, within it divides and forms supply and discharge path 33.
Cylindric container tube 125 is set up in port part 130 and external component 110, within it divides and forms vessel 7.
One end of container tube 125 is embedded in the chimeric recess 131 being formed at port part 130 by O type ring 132.The other end of container tube 125 is embedded in the periphery of external component 110 by O type ring 112.
Be formed with annular slot 113 in the periphery of external component 110, and prevent container tube 125 disengaging vertically by the back-up ring 108 being embedded in annular slot 113.
Oil hydraulic cylinder 101 comprises and runs through container tube 125 and to the fill port 126 of vessel 7 opening and the closure part 114 of this fill port 126 of shutoff.
Closure part 114 comprises and is incorporated into the filling tube 115 of the periphery of container tube 125 by weld part 116 and is screwed together in the drain plug 117 of this filling tube 115.
When being maintenance when supplemental lubrication liquid, oil hydraulic cylinder 101 only carries out elongation work with predetermined stroke, obtains central axis and tilts at a predetermined angle relative to O substantially horizontal and room, bottom side 5 posture lower than bar side room 6.Under the state that oil hydraulic cylinder 101 obtains this posture, when room, bottom side 5 has been filled with the Lubricants of set amount, the position opening that the liquid level of the Lubricants of fill port 126 in container tube 125 arrives.Changing the height and position of fill port 126 by changing container tube 125 relative to the rotational position of cylinder body 10, the setting value of the loading of Lubricants can be changed.
According to the 2nd above mode of execution, play following effect.
In oil hydraulic cylinder 101, utilize the slide part of the Lubricants lube pistons 40 being filled into room, bottom side 5 from fill port 126.Fill port 126 is by closure part 114 shutoff, and room, bottom side 5 is airtight relative to outside thus.Thereby, it is possible to prevent Lubricants from becoming dry and internal rust, prevent piston seal 41 from fixing and be attached at the internal face 11 of cylinder body 10.
In oil hydraulic cylinder 101, possess the external component 110 of the periphery being incorporated into cylinder body 10, be combined with the end of container tube 125 at external component 110.Therefore, it is possible to arrange the vessel 7 of predetermined volumes round cylinder body 10.In addition, according to specification, take off container tube 125 by dismounting back-up ring 108, vessel 7 can be cancelled.
(the 3rd mode of execution)
Next, with reference to Fig. 3, the 3rd mode of execution of the present invention is described.Below, be described centered by the point different from above-mentioned 1st mode of execution, identical reference character marked to the structure identical with the oil hydraulic cylinder of above-mentioned 1st mode of execution and omits the description.
In the oil hydraulic cylinder 1 of above-mentioned 1st mode of execution, it is the structure utilizing the container tube 25 round cylinder body 10 configuration to be provided with vessel 7.On the other hand, in the oil hydraulic cylinder 201 of the 3rd mode of execution, be formed as the tubular of hollow and be provided with the structure this point of vessel 207 in the inner side of piston rod 220 different from the oil hydraulic cylinder 1 of the 1st mode of execution at piston rod 220.
The cylinder body 210 that oil hydraulic cylinder 201 comprises the tubular held in the mode slid freely by piston 240 and the piston rod 220 externally given prominence to from cylinder body 210.Be formed with a bracket part 221 in the tip portion of piston rod 220, have a bracket part 221 and mowing machine side arm 13 to link.Be formed with a bracket part 251 at the base end part of cylinder body 210, have a bracket part 251 and vehicle body side arm to link.The spring (omitting diagram) exerted a force to the direction outstanding from cylinder body 210 by piston rod 220 is provided with round cylinder body 210.
Piston 240 is provided with at the base end part of the piston rod 220 be inserted in cylinder body 210.The space of the inner side of cylinder body 210 is separated into bar side room 206 and room, bottom side 205 by piston 240.Piston seal 241 is folded with in the periphery of piston 240.Piston seal 241 contacts with the internal face 211 of cylinder body 210, thus is sealed between room, bottom side 205 and bar side room 206.
Divide in the inner side of the piston rod 220 of cylindrical shape and be formed with vessel 207.The cardinal extremity of piston rod 220 is to room, bottom side 205 opening.Vessel 207 is communicated with via the cardinal extremity (opening portion) of piston rod 220 with room, bottom side 205.
The supply and discharge port 232 to bar side room 206 opening is formed at cylinder body 210.The pipe arrangement of self-hydraulic source extension is connected with at this supply and discharge port 232.The working solution of hydraulic power supply and discharge is utilized to come in and go out like that as shown by arrows in FIG. supply and discharge port 232.
Be formed with the fill port 226 to room, bottom side 205 opening at cylinder body 210, and be provided with the closure part 214 of this fill port 226 of shutoff.
Closure part 214 comprise the periphery being incorporated into cylinder body 210 filling tube 215 and with the drain plug 217 of this filling tube 215 of mode shutoff that can load and unload.
When being maintenance when supplemental lubrication liquid, oil hydraulic cylinder 201 only carries out elongation work with predetermined stroke, obtains its central axis O and tilts at a predetermined angle relative to substantially horizontal and room, bottom side 205 posture lower than bar side room 206.Under the state that oil hydraulic cylinder 201 obtains this posture, when being the Lubricants being filled with set amount in room, bottom side 205, the position opening that the liquid level of the Lubricants of fill port 226 in cylinder body 210 arrives.
According to the 3rd above mode of execution, play following effect.
In oil hydraulic cylinder 201, utilize the slide part of the Lubricants lube pistons 240 being filled into room, bottom side 205 from fill port 226.Fill port 226 is by closure part 214 shutoff, thus room, bottom side 205 is airtight relative to outside.Thereby, it is possible to prevent Lubricants from becoming dry and internal rust, prevent piston seal 241 from fixing and be attached at the internal face 211 of cylinder body 210.
In oil hydraulic cylinder 201, piston rod 220 is formed as the tubular of hollow, and is provided with vessel 207 in the inner side of piston rod 220.Therefore, compared with situation about arranging round cylinder body with vessel, miniaturization and light is achieved.
Above, describe embodiments of the present invention, but a part for above-mentioned mode of execution only application examples of the present invention, instead of protection scope of the present invention is defined as particularly the meaning of above-mentioned mode of execution.
Also can adopt and form the container of vessel be located at the outside of cylinder body and the structure that is connected via pipe arrangement with the room, bottom side inside cylinder body of the vessel of this container inside by dividing.
Claims (7)
1. an oil hydraulic cylinder (1,101,201), it guides under by the effect of the pressure of the working solution in the above-mentioned bar side room in piston separated bar side room and room, bottom side in self-hydraulic source to carry out contraction work ticket ejector half oil hydraulic cylinder (1,101,201), wherein, this oil hydraulic cylinder (1,101,201) comprising:
The cylinder body (10,210) of tubular, it accommodates piston (40,240) in the mode slid freely, and has above-mentioned bar side room (6,206) and room, above-mentioned bottom side (5,205) in inside;
Piston seal (41,241), it is located in above-mentioned piston (40,240), and is slidingly contacted at the internal face (11,211) of above-mentioned cylinder body (10,210);
Piston rod (20,220), it is linked to above-mentioned piston (40,240), and externally gives prominence to from above-mentioned cylinder body (10,210);
Vessel (7,207), it is communicated in room, above-mentioned bottom side (5,205);
Fill port (26,126,226), it is for filling Lubricants from externally to room, above-mentioned bottom side (5,205) or said vesse room (7,207); And
Closure part (14,114,214), the above-mentioned fill port of its shutoff (26,126,226).
2. oil hydraulic cylinder according to claim 1 (1,101), wherein,
Above-mentioned oil hydraulic cylinder (1,101) also comprises the container tube (25,125) configured round above-mentioned cylinder body (10),
Said vesse room (7) is provided with between above-mentioned cylinder body (10) and said vesse pipe (25,125).
3. oil hydraulic cylinder according to claim 2 (1), wherein,
The port part (30) guiding and carry out the ring-type of the working solution of supply and discharge relative to above-mentioned bar side room (5) is combined with in the periphery of above-mentioned cylinder body (10),
End and the above-mentioned port part (30) of said vesse pipe (25) combine.
4. oil hydraulic cylinder according to claim 3 (1), wherein,
Above-mentioned oil hydraulic cylinder (1) also comprises the base (50) of the open end of the above-mentioned cylinder body of shutoff (10),
The lip part (52) be combined with the end of said vesse pipe (25) is formed at above-mentioned base (50).
5. oil hydraulic cylinder according to claim 3 (101), wherein,
Above-mentioned oil hydraulic cylinder (101) also comprises the external component (110) of the ring-type be combined with the periphery of above-mentioned cylinder body (10),
Said vesse pipe (125) is set up in above-mentioned port part (130) and said external parts (110).
6. oil hydraulic cylinder according to claim 1 (201), wherein,
Above-mentioned piston rod (220) is formed as the tubular of hollow,
Said vesse room (207) is provided with in the inner side of above-mentioned piston rod (220).
7. oil hydraulic cylinder according to any one of claim 1 to 6 (1,101,201), wherein,
Under the state of posture setting above-mentioned oil hydraulic cylinder (1,101,201) with above-mentioned piston rod (20,220) upward from the mode that above-mentioned cylinder body (10,210) extends, the position that the liquid level of the Lubricants that above-mentioned fill port (26,126,226) is located at when the Lubricants of set amount is filled in room, above-mentioned bottom side (5,205) or said vesse room (7,207) arrives.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012222376A JP6166881B2 (en) | 2012-10-04 | 2012-10-04 | Single acting hydraulic cylinder |
| JP2012-222376 | 2012-10-04 | ||
| PCT/JP2013/076142 WO2014054505A1 (en) | 2012-10-04 | 2013-09-26 | Hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104704248A true CN104704248A (en) | 2015-06-10 |
| CN104704248B CN104704248B (en) | 2017-03-01 |
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ID=50434833
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380052248.6A Active CN104704248B (en) | 2012-10-04 | 2013-09-26 | Hydraulic cylinder |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6166881B2 (en) |
| KR (1) | KR101790852B1 (en) |
| CN (1) | CN104704248B (en) |
| WO (1) | WO2014054505A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109058224A (en) * | 2018-07-02 | 2018-12-21 | 河南德佰特机电设备制造有限公司 | A kind of adjustable fluid pressure cylinder |
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| CN109058224A (en) * | 2018-07-02 | 2018-12-21 | 河南德佰特机电设备制造有限公司 | A kind of adjustable fluid pressure cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014074460A (en) | 2014-04-24 |
| JP6166881B2 (en) | 2017-07-19 |
| KR101790852B1 (en) | 2017-10-26 |
| KR20150047610A (en) | 2015-05-04 |
| WO2014054505A1 (en) | 2014-04-10 |
| CN104704248B (en) | 2017-03-01 |
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