CN204127030U - There is the height integrated hydraulic servo-cylinder of buffering and overload protection function - Google Patents

There is the height integrated hydraulic servo-cylinder of buffering and overload protection function Download PDF

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Publication number
CN204127030U
CN204127030U CN201420590203.6U CN201420590203U CN204127030U CN 204127030 U CN204127030 U CN 204127030U CN 201420590203 U CN201420590203 U CN 201420590203U CN 204127030 U CN204127030 U CN 204127030U
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CN
China
Prior art keywords
cylinder
oil
communicated
buffering
low
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CN201420590203.6U
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Chinese (zh)
Inventor
荣学文
宋锐
柴汇
李贻斌
孟健
张国腾
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山东大学
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Priority to CN201420590203.6U priority Critical patent/CN204127030U/en
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Publication of CN204127030U publication Critical patent/CN204127030U/en

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Abstract

The utility model discloses a kind of height integrated hydraulic servo-cylinder with buffering and overload protection function, comprise a cylinder barrel, the end cap that its end face coordinates is provided with before and after described cylinder barrel, cylinder barrel and forward and backward end cap composition have the cylinder body of hollow cavity, the piston rod be processed as one and piston is equiped with in the hollow cavity of cylinder body, offer high-pressure oil passage hole and low pressure oil way hole at cylinder body, rear end cover is provided with pull pressure sensor; The each self-assembly in high-pressure oil passage hole and low pressure oil way hole one is fixed on cylinder barrel upper connection body, and a fittings body is communicated with high tension loop, and another fittings body is communicated with low tension loop; Cylinder body is installed electrohydraulic control, one-way valve, safety valve and hydraulic accumulator, and the hydraulic oil of one-way valve is flowed into end and is communicated with hole, system low-voltage loop by one-way valve oil-way board, and outflow end is communicated with cylinder rod chamber; Hydraulic accumulator is communicated with the rodless cavity of oil cylinder, and the high voltage terminal of safety valve is communicated with the rodless cavity of oil cylinder, low voltage terminal and system low-voltage circuit communication.

Description

There is the height integrated hydraulic servo-cylinder of buffering and overload protection function

Technical field

The present invention is the integrated hydraulic servo oil cylinder of a kind of height, especially has the high-frequency hydraulic servo-cylinder of buffering and overload protection function, belongs to hydraulic servo drive technology field.

Background technique

Hydraulic servo oil cylinder has that thrust is large, quality is light, level of integration is high, dynamic response is fast, control accuracy high, is used widely in fields such as engineering machinery, metallurgical machinery, boats and ships, Aero-Space, robots.But in existing hydraulic servo oil cylinder product; all not there is elastic buffer and over-voltage protecting function, very easily cause the damage in various degree of hydraulic servo oil cylinder Sealing, electrohydraulic control, sensor or start object under the operating mode that, jerk high in operating frequency is large or greatly shorten their operating life.

Chinese patent literature CN101776100B discloses a kind of high-frequency respond integration servo oil cylinder, CN101776099B discloses a kind of high integration servo oil cylinder, CN2058434U discloses a kind of hydraulic servo linear oil cylinder of robot, CN201714733U discloses a kind of hydraulic servo oil cylinder, CN201547056U discloses a kind of high-precision hydraulic servo-cylinder, but all non-integrated resiliency buffer element of above-mentioned hydraulic servo oil cylinder, overload protection element and pull pressure sensor, therefore high in operating frequency, very easily hydraulic servo oil cylinder Sealing is caused under the operating mode that jerk is large, electrohydraulic control, sensor or start object damage in various degree or greatly shorten their operating life.

Summary of the invention

The present invention is directed to that existing hydraulic servo oil cylinder is high in operating frequency, Problems existing under the large operating mode of jerk, provide a kind of height integrated, the height integrated hydraulic servo-cylinder with buffering and overload protection function.

The present invention is by the following technical solutions:

There is the height integrated hydraulic servo-cylinder of buffering and overload protection function, comprise a cylinder barrel, an end cap coordinated with inner wall of cylinder is provided with in described cylinder barrel front end, cylinder barrel and front cover composition have the cylinder body of hollow cavity, the piston rod be processed as one and piston is equiped with in the hollow cavity of cylinder body, cylinder wall is provided with high-pressure oil passage hole and low pressure oil way hole, and cylinder body tail end is provided with pull pressure sensor; The each self-assembly in described high-pressure oil passage hole and low pressure oil way hole fittings body be fixed on cylinder barrel, one of them fittings body is communicated with the high tension loop of oil cylinder outside, and another fittings body is communicated with the low tension loop of oil cylinder outside; Cylinder body is provided with electrohydraulic control, one-way valve, safety valve and micro hydraulic accumulator, and the hydraulic oil of described one-way valve is flowed into end and is communicated with low pressure oil way hole by one-way valve oil-way board, and outflow end is communicated with cylinder rod chamber; Described micro hydraulic accumulator is communicated with the rodless cavity of oil cylinder, and the high voltage terminal of described safety valve is communicated with the rodless cavity of oil cylinder, and low voltage terminal is communicated with system low-voltage oil circuit hole.

Described piston rod afterbody is processed with the piston coordinated with inner cavity of cylinder, piston is provided with combined seal ring I and guide ring I, and cylinder bar front end is processed with the outside thread be connected with cylinder bar earrings.

Be threaded connection rod end earrings in described cylinder bar front end, and be fixed with a fork by two ball bearings on rod end earrings, and ball bearing one end is located by the shaft shoulder, the other end is located by circlip.

Described cylinder barrel is also provided with a displacement transducer, and described displacement transducer is fixed on cylinder barrel by pipe clamp, and the pull bar front end of displacement transducer is threaded connection and is fixed on fork.

Described electrohydraulic control is arranged on the valve seat of cylinder barrel.

Described micro hydraulic accumulator is installed on processing in the mounting hole of cylinder barrel, and is communicated with the rodless cavity of oil cylinder.

Described safety valve is installed on processing in the bore I of cylinder barrel, and high voltage terminal is communicated with the rodless cavity of oil cylinder, low voltage terminal and system low-voltage circuit communication.

Described one-way valve is installed on processing in the bore II of cylinder barrel, and hydraulic oil flows into end by one-way valve oil-way board and system low-voltage circuit communication, and outflow end is communicated with cylinder rod chamber, swollen plug II shutoff of the oil circuit bore ends on one-way valve oil-way board.

Described pull pressure sensor one end connects in the tapped hole of cylinder barrel afterbody, and the other end is connected in the tapped hole of afterbody earrings.

Described front cover is threaded connection and is arranged on inner cavity of cylinder front end, and by the static seal between the realization of O type circle and cylinder barrel, guiding to cylinder bar and supporting is realized by guide ring II, realize the motive sealing between cylinder bar by combined seal ring II, stop the dust in environment to enter cylinder barrel inside by dust-proof seal ring.

Working principle of the present invention is as follows:

The present invention is mainly applicable to the occasion of oil cylinder rodless cavity as effective active chamber.When oil cylinder is without external compressive load, in rodless cavity, hydraulic fluid pressure equals system low-voltage circuit pressure, and usually can think that pressure is zero, the inert gas pressure in accumulator air bag equals inflation pressure.When the increase of oil cylinder external compressive load or when having impact, in rodless cavity, hydraulic fluid pressure raises, and when reaching charging pressure of accumulator, the air bag in accumulator is compressed, and plays the effect of buffering and shock-absorbing.Accumulator is operationally a variation rigidity gas spring, and when load is less outside, rigidity is less, and with the increase of load or impact force, rigidity increases thereupon.Along with the compression of gas in accumulator, cylinder bar creates additional displacement, and rod chamber is by one-way valve repairing from system low-voltage loop.

When generation intense impact; when in rodless cavity, hydraulic fluid pressure exceedes safety valve setting pressure; in rodless cavity, hydraulic oil overflows to system low-voltage oil circuit by safety valve, thus protection cylinder seal part, electrohydraulic control, pull pressure sensor and start object etc. are not damaged.

By the output signal of displacement transducer and pulling force sensor being introduced in control system, the Close loop servo control to hydraulic servo oil cylinder displacement and ouput force can be realized.

Beneficial effect of the present invention is as follows:

1. rodless cavity of the present invention is provided with micro hydraulic accumulator, has buffering, vibration-absorbing function during work.

2. rodless cavity of the present invention is provided with safety valve, when there is intense impact, can available protecting cylinder seal part, electrohydraulic control, pull pressure sensor and start object etc. not be damaged.

3. level of integration of the present invention is high, volume is little, quality is light, can be used for the workplace that operating frequency is high, installing space is narrow and small.

Accompanying drawing explanation

Fig. 1 is schematic three dimensional views of the present invention.

Fig. 2 is longitudinal sectional view of the present invention.

Fig. 3 is main oil circuit place of the present invention section plan.

Fig. 4 is hydraulic work schematic diagram of the present invention.

In figure: 1-electrohydraulic control, 2-micro hydraulic accumulator, 3-safety valve, 4-is swollen plug I, 5-fittings body, 6-afterbody earrings, 7-pull pressure sensor, 8-guide ring I, 9-combined seal ring I, 10-cylinder barrel, 11-cylinder bar, 12-guide ring II, 13-combined seal ring II, 14-O type circle, 15-end cap, 16-dust-proof seal ring, 17-circlip, 18-fork, 19-bearing, 20-rod end earrings, 21-is swollen plug II, 22-one-way valve, 23-one-way valve oil-way board, 24-pipe clamp, 25-displacement transducer, P-high-pressure oil passage hole, R-low pressure oil way hole.

Embodiment

Below in conjunction with accompanying drawing, this patent is described further.

As shown in the figure, the composition with the height integrated hydraulic servo-cylinder of buffering and overload protection function comprises: electrohydraulic control 1, micro hydraulic accumulator 2, safety valve 3, swollen plug I 4, fittings body 5, afterbody earrings 6, pull pressure sensor 7, guide ring I 8, combined seal ring I 9, cylinder barrel 10, cylinder bar 11, guide ring II 12, combined seal ring II 13, O type circle 14, end cap 25, dust-proof seal ring 16, circlip 17, fork 18, bearing 19, rod end earrings 20, swollen plug II 21, one-way valve 22, one-way valve oil-way board 23, pipe clamp 24, displacement transducer 25, high-pressure oil passage hole P, low pressure oil way hole R and ball bearing and some screw-nut standard piece.

Cylinder barrel 10 is processed with and moves with cylinder bar 11 tail end piston the inner chamber coordinated, be processed with and electrohydraulic control 1, one-way valve 22, safety valve 3, micro hydraulic accumulator 4, the interior threaded hole of fittings body 5 and high-pressure oil passage hole P and low pressure oil way hole R are installed, afterbody is processed with the interior threaded hole connecting pull pressure sensor 7, cavity ends is processed with the internal thread installing end cap 15, cylinder barrel 10 does not need oil circuit hole swollen plug 4 shutoff outwards connected.

Cylinder bar 11 afterbody is processed with and moves with cylinder barrel 10 inner chamber the piston coordinated, and piston is provided with combined seal ring 9 and guide ring 8, and cylinder bar 11 front end is processed with the outside thread be connected with rod end earrings 20.Combined seal ring 9 realizes the motive sealing between piston and cylinder barrel 10 inner chamber, and guide ring 8 realizes cylinder barrel 10 inner chamber arm to the guiding of piston and supporting.

Described electrohydraulic control 1 is arranged on the valve seat of cylinder barrel 10.

Described micro hydraulic accumulator 2 is installed on processing in the tapped hole of cylinder barrel 10, and is communicated with the rodless cavity of oil cylinder, is sealed between micro hydraulic accumulator 2 and cylinder barrel 10 by standard O type circle.

Safety valve 3 is installed on processing in the bore of cylinder barrel 10, and its high voltage terminal is communicated with the rodless cavity of oil cylinder, and low voltage terminal is communicated with system low-voltage loop hole R.

One-way valve 22 be installed on processing in the bore of cylinder barrel 10, hydraulic oil flow into end be communicated with system low-voltage loop hole R by one-way valve oil-way board 23, outflow end is communicated with cylinder rod chamber, on one-way valve oil-way board 23 swollen plug 21 shutoff of oil circuit bore ends.

Pull pressure sensor 7 one end connects in the tapped hole of cylinder barrel 10 afterbody, and the other end is connected in the tapped hole of afterbody earrings 6.

End cap 15 is threaded connection and is arranged on cylinder barrel 10 inner chamber front end, and realized by O type circle 14 and static seal between cylinder barrel 10, guiding to cylinder bar 11 and supporting is realized by guide ring 12, realize the motive sealing between cylinder bar 11 by combined seal ring 13, stop the dust in environment to enter cylinder barrel 10 by dust-proof seal ring 16 inner.

Rod end earrings 20 is threaded connection and is fixed on cylinder bar 11 front end.

Fork 18 is fixed on rod end earrings 20 by two ball bearings, and bearing one end is located by the shaft shoulder, and the other end is located by circlip 17.

Displacement transducer 25 is fixed on cylinder barrel 10 by pipe clamp 24, and the pull bar front end of displacement transducer 25 is threaded connection and is fixed on fork 18.

Fittings body 5 is screwed in the interior threaded hole of processing on cylinder barrel 10, one of them fittings body connected system high tension loop, another fittings body connected system low tension loop.

The present invention is mainly applicable to the occasion of oil cylinder rodless cavity as effective active chamber.When oil cylinder is without external compressive load, in rodless cavity, hydraulic fluid pressure equals system low-voltage circuit pressure, and usually can think that pressure is zero, the inert gas pressure in accumulator 2 air bag equals inflation pressure.When the increase of oil cylinder external compressive load or when having impact, in rodless cavity, hydraulic fluid pressure raises, and when reaching the inflation pressure of accumulator 2, the air bag in accumulator 2 is compressed, and plays the effect of buffering and shock-absorbing.Accumulator 2 is operationally a variation rigidity gas spring, and when load is less outside, rigidity is less, and with the increase of load or impact force, rigidity increases thereupon.Along with the compression of gas in accumulator 2, cylinder bar 11 creates additional displacement, and rod chamber is by one-way valve 22 repairing from the hole R of system low-voltage loop.

When generation intense impact; when in rodless cavity, hydraulic fluid pressure exceedes safety valve 3 setting pressure; in rodless cavity, hydraulic oil is overflowed in system low-voltage oil circuit by safety valve 3, thus protection cylinder seal part, electrohydraulic control 1, pull pressure sensor 7 and start object etc. are not damaged.

Introduce in control system by displacement transducer 25 is outputed signal, the Close loop servo control to hydraulic servo oil cylinder displacement can be realized.

Introduce in control system by pull pressure sensor 7 is outputed signal, the Close loop servo control to hydraulic servo oil cylinder ouput force can be realized.

Claims (10)

1. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function, it is characterized in that: comprise a cylinder barrel, an end cap coordinated with inner wall of cylinder is provided with in described cylinder barrel front end, cylinder barrel and front cover composition have the cylinder body of hollow cavity, the piston rod be processed as one and piston is equiped with in the hollow cavity of cylinder body, cylinder wall offers high-pressure oil passage hole and low pressure oil way hole, and cylinder body tail end is provided with pull pressure sensor; The each self-assembly in described high-pressure oil passage hole and low pressure oil way hole one is fixed on cylinder barrel upper connection body, and one of them fittings body is communicated with the high tension loop of oil cylinder outside, and another fittings body is communicated with the low tension loop of oil cylinder outside; Cylinder body is provided with electrohydraulic control, one-way valve, safety valve and micro hydraulic accumulator, and the hydraulic oil of described one-way valve is flowed into end and is communicated with low pressure oil way hole by one-way valve oil-way board, and outflow end is communicated with cylinder rod chamber; Described hydraulic accumulator is communicated with the rodless cavity of oil cylinder, and the high voltage terminal of described safety valve is communicated with the rodless cavity of oil cylinder, and low voltage terminal is communicated with system low-voltage oil circuit hole.
2. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described piston rod afterbody is processed with the piston coordinated with inner cavity of cylinder, piston is provided with combined seal ring I and guide ring I, and cylinder bar front end is processed with the outside thread be connected with cylinder bar earrings.
3. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Be threaded connection rod end earrings in described piston rod front end, and be fixed with a fork by two ball bearings on rod end earrings, and ball bearing one end is located by the shaft shoulder, the other end is located by circlip.
4. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described cylinder barrel is also provided with a displacement transducer, and described displacement transducer is fixed on cylinder barrel by pipe clamp, and the pull bar front end of displacement transducer is threaded connection and is fixed on fork.
5. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described electrohydraulic control is arranged on the valve seat of cylinder barrel.
6. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described micro hydraulic accumulator is installed on processing in the mounting hole of cylinder barrel, and is communicated with the rodless cavity of oil cylinder.
7. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described safety valve is installed on processing in the bore I of cylinder barrel, and high voltage terminal is communicated with the rodless cavity of oil cylinder, low voltage terminal and system low-voltage circuit communication.
8. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described one-way valve is installed on processing in the bore II of cylinder barrel, and hydraulic oil flows into end by one-way valve oil-way board and system low-voltage circuit communication, and outflow end is communicated with cylinder rod chamber, swollen plug II shutoff of the oil circuit bore ends on one-way valve oil-way board.
9. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described pull pressure sensor one end connects in the tapped hole of cylinder barrel afterbody, and the other end is connected in the tapped hole of afterbody earrings.
10. there is the height integrated hydraulic servo-cylinder of buffering and overload protection function as claimed in claim 1, it is characterized in that:
Described front cover is threaded connection and is arranged on inner cavity of cylinder front end, and by the static seal between the realization of O type circle and cylinder barrel, guiding to cylinder bar and supporting is realized by guide ring II, realize the motive sealing between cylinder bar by combined seal ring II, stop the dust in environment to enter cylinder barrel inside by dust-proof seal ring.
CN201420590203.6U 2014-10-13 2014-10-13 There is the height integrated hydraulic servo-cylinder of buffering and overload protection function CN204127030U (en)

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Application Number Priority Date Filing Date Title
CN201420590203.6U CN204127030U (en) 2014-10-13 2014-10-13 There is the height integrated hydraulic servo-cylinder of buffering and overload protection function

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295558A (en) * 2014-10-13 2015-01-21 山东大学 Highly integrated hydraulic servo oil cylinder having buffering and overload protection functions
CN105366406A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Coiled material splitting machine ultrasonic deviation rectifying mechanism with overload protection function
CN105366405A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Coiled material slitting and rectifying mechanism with damping and overload protecting functions
CN105366404A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Photoelectric correcting mechanism with rust protection and overload protection for coiled material splitting machine
CN105383980A (en) * 2015-12-14 2016-03-09 重庆东登科技有限公司 Coiled material splitting machine ultrasonic correcting mechanism with functions of rust prevention, shock absorption and overload protection
CN106545541A (en) * 2016-10-27 2017-03-29 徐州工程学院 A kind of remote control type Suporting structure hydraulic locking apparatus and its method of work
CN107559262A (en) * 2017-08-25 2018-01-09 大连理工大学 A kind of small stroke servo-cylinder of low friction

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104295558A (en) * 2014-10-13 2015-01-21 山东大学 Highly integrated hydraulic servo oil cylinder having buffering and overload protection functions
CN105366406A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Coiled material splitting machine ultrasonic deviation rectifying mechanism with overload protection function
CN105366405A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Coiled material slitting and rectifying mechanism with damping and overload protecting functions
CN105366404A (en) * 2015-12-14 2016-03-02 重庆东登科技有限公司 Photoelectric correcting mechanism with rust protection and overload protection for coiled material splitting machine
CN105383980A (en) * 2015-12-14 2016-03-09 重庆东登科技有限公司 Coiled material splitting machine ultrasonic correcting mechanism with functions of rust prevention, shock absorption and overload protection
CN106545541A (en) * 2016-10-27 2017-03-29 徐州工程学院 A kind of remote control type Suporting structure hydraulic locking apparatus and its method of work
CN107559262A (en) * 2017-08-25 2018-01-09 大连理工大学 A kind of small stroke servo-cylinder of low friction

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Granted publication date: 20150128

Termination date: 20171013