CN103321987A - Hydraulic motor buffer control mechanism - Google Patents
Hydraulic motor buffer control mechanism Download PDFInfo
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- CN103321987A CN103321987A CN2013102392830A CN201310239283A CN103321987A CN 103321987 A CN103321987 A CN 103321987A CN 2013102392830 A CN2013102392830 A CN 2013102392830A CN 201310239283 A CN201310239283 A CN 201310239283A CN 103321987 A CN103321987 A CN 103321987A
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- overflow valve
- buffer overflow
- buffering
- buffer
- oil
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Abstract
The invention relates to a hydraulic motor buffer control mechanism, which comprises a first main oil way and a second main oil way, wherein one end of the first main oil way is communicated with a main oil way unit; the hydraulic motor buffer control mechanism is characterized by also comprising two buffer overflow valves with same structures and with conical valve cores, i.e., a first buffer overflow valve and a second buffer overflow valve, wherein each buffer overflow valve is provided with at least one oil inlet and outlet, an overflow oil port and a buffer oil port; when each buffer overflow valves is closed, the oil inlet and outlet is communicated with the buffer oil port; after each buffer overflow valve is opened, the oil inlet and outlet is communicated with the overflow oil port. The hydraulic motor buffer control mechanism has the advantages of a compact structure, quick response, small pressure pulsation, obvious buffer effects, stable starting of a hydraulic motor and capabilities of absorbing the pressure pulsation during stop and brake, so that the operation comfort is increased, and the service life of a hydraulic element is improved.
Description
Technical field
The present invention relates to a kind of oil hydraulic motor buffering control mechanism, the walking that is used for medium-and-large-sized crawler hypraulic excavator drives, and belongs to technical field of hydraulic elements.
Background technique
The machine of medium-and-large-sized crawler excavator is heavy generally all more than 20t, the inertia of machine is very large, can bring larger impact to hydraulic system at machine startup with when stopping, operation comfort is affected, easily cause the hydraulic system element damage, shorten working life of hydraulic element, the most structure of more existing buffering control mechanisms complexity, lags in response, cushioning effect is not obvious.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of compact structure, is quick on the draw, pressure pulsation is little, the obvious oil hydraulic motor buffering of cushioning effect control mechanism.
In order to solve the problems of the technologies described above, technological scheme of the present invention has provided a kind of oil hydraulic motor buffering control mechanism, comprise the first working connection and the second working connection that an end is connected with the working connection unit, it is characterized in that: comprise also that two structures are identical and have the buffer overflow valve of taper valve core, i.e. the first buffer overflow valve and the second buffer overflow valve, each buffer overflow valve has oil inlet and outlet at least, overflow hydraulic fluid port and buffering hydraulic fluid port, when buffer overflow valve is closed, oil inlet and outlet and the conducting of buffering hydraulic fluid port, after buffer overflow valve is opened, oil inlet and outlet and the conducting of overflow hydraulic fluid port;
The two ends of buffering oil circuit control are connected with the buffering hydraulic fluid port of the first buffer overflow valve and the second buffer overflow valve respectively, are provided with damping mechanism at the buffering oil circuit control; The oil inlet and outlet of the first buffer overflow valve and the second buffer overflow valve is connected with the first working connection and the second working connection respectively; The other end of the first working connection and the second working connection is connected with the overflow hydraulic fluid port of the second buffer overflow valve and the first buffer overflow valve respectively.
Preferably, described damping mechanism comprises the buffering grease chamber that is connected with described buffering oil circuit control, but in the buffering grease chamber, be provided with the damper piston of two move left and right, between the piston wall of two damper piston opposite sides, be provided with damping spring, form respectively a buffering oil pocket between the inwall of the piston wall of two damper piston opposite sides and buffering grease chamber.
Preferably, be provided with throttle orifice at described taper valve core, when described buffer overflow valve was closed, described oil inlet and outlet was by throttle orifice and the conducting of described buffering hydraulic fluid port.
Advantage of the present invention is: compact structure, be quick on the draw, pressure pulsation is little, cushioning effect is obvious, and oil hydraulic motor is started steadily, absorb to stop and the pressure pulse when braking, thereby increased operation comfort, improved hydraulic element working life.
Description of drawings
The structural representation of the disclosed a kind of oil hydraulic motor buffering control mechanism of Fig. 1 embodiment.
Embodiment
For the present invention is become apparent, hereby with preferred embodiment, and cooperate accompanying drawing to be described in detail below.
As shown in Figure 1, the disclosed a kind of oil hydraulic motor buffering control mechanism of the present embodiment comprises working connection and buffering oil circuit control.For the convenience on narrating, working connection is split as the first working connection 6-1, the second working connection 6-2 and working connection unit, the end of the first working connection 6-1 and the second working connection 6-2 is connected with the working connection unit.Be provided with buffer overflow valve two parallel connections and that structure is identical at working connection, respectively called after the first buffer overflow valve 1-1 and the second buffer overflow valve 1-2.Be provided with movable cone spool 2 in each buffer overflow valve, be provided with throttling pore in the taper valve core 2, each buffer overflow valve has oil inlet and outlet, overflow hydraulic fluid port and buffering hydraulic fluid port.When buffer overflow valve was closed, oil inlet and outlet was by throttling pore and cushion the hydraulic fluid port conducting, after buffer overflow valve is opened, and oil inlet and outlet and the conducting of overflow hydraulic fluid port.
The two ends of buffering oil circuit control 7 are connected with the buffering hydraulic fluid port of the first buffer overflow valve 1-1 and the second buffer overflow valve 1-2 respectively, are provided with buffering grease chamber 3 at buffering oil circuit control 7.But in buffering grease chamber 3, be provided with the damper piston 4 of two move left and right, between the inwall of the piston wall that is provided with 5, two damper piston 4 opposite sides of damping spring between the piston wall of two damper piston 4 opposite sides and buffering grease chamber 3, form respectively a buffering oil pocket.The oil inlet and outlet of the first buffer overflow valve 1-1 and the second buffer overflow valve 1-2 is connected with the first working connection 6-1 and the second working connection 6-2 respectively; The other end of the first working connection 6-1 and the second working connection 6-2 is connected with the overflow hydraulic fluid port of the second buffer overflow valve 1-2 and the first buffer overflow valve 1-1 respectively.
During work, suppose by chamber A oil-feed, chamber B oil return, motor starting rotation, the throttling pore that hydraulic oil is established in taper valve core 2 by the oil inlet and outlet a of the first buffer overflow valve 1-1, enter the right-hand member of buffering grease chamber 3 by buffering hydraulic fluid port b, damper piston 4 is promoted left, form the buffering oil pocket, the pressure of this buffering oil pocket can progressively rise, owing to the effect of damping spring 5, delayed the rise time of pressure.If this moment, system pressure surpassed the one-level setting pressure of buffer overflow valve, act on the pressure oil of oil inlet and outlet a and will push taper valve core 2 open in moment this moment, pressure oil overflows to chamber B by overflow hydraulic fluid port c, thereby plays buffer function, the impact when having reduced motor starting.
When motor begins to stop operating, under the effect of working connection control valve, chamber A and chamber B close, because the motor that affects of machine inertia continues rotation, the function of motor is converted to pump, cause the pressure of chamber B to raise, the pressure-acting of chamber B is at the oil inlet and outlet d of the second buffer overflow valve 1-2, and pressure oil enters buffering grease chamber 3 left ends by the throttling pore on the taper valve core 2 of the second buffer overflow valve 1-2 by buffering hydraulic fluid port e, damper piston 4 is promoted to the right, in this process, damping spring 5 plays the effect of time-delay buffering, after damper piston 4 is pushed into low order end, oil inlet and outlet d pressure rise, when surpassing the one-level setting pressure of the second buffer overflow valve 1-2, the taper valve core 2 of the second buffer overflow valve 1-2 will be open, and pressure oil overflows to chamber A by overflow hydraulic fluid port f, because the diameter of taper valve core 2 is poor, under relief valve spring force and differential pressure action, the taper valve core 2 of the second buffer overflow valve 1-2 will be closed very soon, and this process is very of short duration, purpose is to eliminate chamber B pulsating pressure, prevents that chamber A from inhaling empty.After the second buffer overflow valve 1-2 closes fully, chamber B pressure continues rising and acts on the flow-off e of the first buffer overflow valve 1-1, when chamber B pressure rise is the maximum service pressure of motor to the first buffer overflow valve 1-1 secondary pressure, hydraulic oil produces different difference force by the active area difference, upwards push the taper valve core 2 of the first buffer overflow valve 1-1 open overflow, fluid is let out oil inlet and outlet a, stop and absorption pressure pulse and buffer function when braking thereby play.
Claims (3)
1. an oil hydraulic motor cushions control mechanism, comprise the first working connection (6-1) and the second working connection (6-2) that an end is connected with the working connection unit, it is characterized in that: comprise also that two structures are identical and have the buffer overflow valve of taper valve core (2), i.e. the first buffer overflow valve (1-1) and the second buffer overflow valve (1-2), each buffer overflow valve has oil inlet and outlet at least, overflow hydraulic fluid port and buffering hydraulic fluid port, when buffer overflow valve is closed, oil inlet and outlet and the conducting of buffering hydraulic fluid port, after buffer overflow valve is opened, oil inlet and outlet and the conducting of overflow hydraulic fluid port;
The two ends of buffering oil circuit control (7) are connected with the buffering hydraulic fluid port of the first buffer overflow valve (1-1) and the second buffer overflow valve (1-2) respectively, are provided with damping mechanism at buffering oil circuit control (7); The oil inlet and outlet of the first buffer overflow valve (1-1) and the second buffer overflow valve (1-2) is connected with the first working connection (6-1) and the second working connection (6-2) respectively; The other end of the first working connection (6-1) and the second working connection (6-2) is connected with the overflow hydraulic fluid port of the second buffer overflow valve (1-2) and the first buffer overflow valve (1-1) respectively.
2. a kind of oil hydraulic motor as claimed in claim 1 cushions control mechanism, it is characterized in that: described damping mechanism comprises the buffering grease chamber (3) that is connected with described buffering oil circuit control (7), in buffering grease chamber (3) but in be provided with the damper piston (4) of two move left and right, between the piston wall of two damper pistons (4) opposite side, be provided with damping spring (5), form respectively a buffering oil pocket between the inwall of the piston wall of two damper pistons (4) opposite side and buffering grease chamber (3).
3. a kind of oil hydraulic motor as claimed in claim 1 cushions control mechanism, and it is characterized in that: be provided with throttle orifice at described taper valve core (2), when described buffer overflow valve was closed, described oil inlet and outlet was by throttle orifice and the conducting of described buffering hydraulic fluid port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102392830A CN103321987A (en) | 2013-06-17 | 2013-06-17 | Hydraulic motor buffer control mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102392830A CN103321987A (en) | 2013-06-17 | 2013-06-17 | Hydraulic motor buffer control mechanism |
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| CN103321987A true CN103321987A (en) | 2013-09-25 |
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| CN2013102392830A Pending CN103321987A (en) | 2013-06-17 | 2013-06-17 | Hydraulic motor buffer control mechanism |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742486A (en) * | 2014-01-07 | 2014-04-23 | 龙工（上海）精工液压有限公司 | Anti-reversal valve for excavator rotary motor |
| CN104895860A (en) * | 2015-04-27 | 2015-09-09 | 徐工集团工程机械股份有限公司科技分公司 | Rotation buffering assembly of hydraulic backhoe loader |
| CN108050119A (en) * | 2017-12-29 | 2018-05-18 | 常熟华威履带有限公司 | A kind of excavator buffer overflow valve |
| CN109026888A (en) * | 2018-10-18 | 2018-12-18 | 宁波文泽机电技术开发有限公司 | A kind of rotary buffering valve |
| CN109578298A (en) * | 2019-01-23 | 2019-04-05 | 宋丽丽 | The full-automatic anticollision fan motor of hydraulic control start and stop |
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| JPH07243402A (en) * | 1994-03-04 | 1995-09-19 | Kubota Corp | Hydraulic pressure gradually varying mechanism |
| US5979862A (en) * | 1995-01-20 | 1999-11-09 | Mannesman Rexroth Ag | Pilot-operated proportional pressure limiting valve |
| CN2711433Y (en) * | 2004-07-16 | 2005-07-20 | 胡世璇 | Integration of control component and hydraulic motor in oil distributor |
| CN101260970A (en) * | 2007-11-15 | 2008-09-10 | 四川新川航空仪器有限责任公司 | Constant temperature constant pressure oil cylinder |
| CN103016435A (en) * | 2012-12-27 | 2013-04-03 | 宁波广天赛克思液压有限公司 | Valve for preventing hydraulic motor from reversing |
| CN203412852U (en) * | 2013-06-17 | 2014-01-29 | 龙工（上海）精工液压有限公司 | Hydraulic motor buffer control mechanism |
-
2013
- 2013-06-17 CN CN2013102392830A patent/CN103321987A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07243402A (en) * | 1994-03-04 | 1995-09-19 | Kubota Corp | Hydraulic pressure gradually varying mechanism |
| US5979862A (en) * | 1995-01-20 | 1999-11-09 | Mannesman Rexroth Ag | Pilot-operated proportional pressure limiting valve |
| CN2711433Y (en) * | 2004-07-16 | 2005-07-20 | 胡世璇 | Integration of control component and hydraulic motor in oil distributor |
| CN101260970A (en) * | 2007-11-15 | 2008-09-10 | 四川新川航空仪器有限责任公司 | Constant temperature constant pressure oil cylinder |
| CN103016435A (en) * | 2012-12-27 | 2013-04-03 | 宁波广天赛克思液压有限公司 | Valve for preventing hydraulic motor from reversing |
| CN203412852U (en) * | 2013-06-17 | 2014-01-29 | 龙工（上海）精工液压有限公司 | Hydraulic motor buffer control mechanism |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742486A (en) * | 2014-01-07 | 2014-04-23 | 龙工（上海）精工液压有限公司 | Anti-reversal valve for excavator rotary motor |
| CN104895860A (en) * | 2015-04-27 | 2015-09-09 | 徐工集团工程机械股份有限公司科技分公司 | Rotation buffering assembly of hydraulic backhoe loader |
| CN108050119A (en) * | 2017-12-29 | 2018-05-18 | 常熟华威履带有限公司 | A kind of excavator buffer overflow valve |
| CN109026888A (en) * | 2018-10-18 | 2018-12-18 | 宁波文泽机电技术开发有限公司 | A kind of rotary buffering valve |
| CN109578298A (en) * | 2019-01-23 | 2019-04-05 | 宋丽丽 | The full-automatic anticollision fan motor of hydraulic control start and stop |
| CN109578298B (en) * | 2019-01-23 | 2024-03-19 | 宋丽丽 | Hydraulic control start-stop full-automatic anti-collision fan motor |
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Application publication date: 20130925 |