CN102390372B - Hydraulic control power cutting device of down-hole trackless rubber-tyred car - Google Patents
Hydraulic control power cutting device of down-hole trackless rubber-tyred car Download PDFInfo
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- CN102390372B CN102390372B CN 201110348085 CN201110348085A CN102390372B CN 102390372 B CN102390372 B CN 102390372B CN 201110348085 CN201110348085 CN 201110348085 CN 201110348085 A CN201110348085 A CN 201110348085A CN 102390372 B CN102390372 B CN 102390372B
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Abstract
The invention belongs to a power cutting device of a down-hole trackless rubber-tyred mine car, particularly relates to a hydraulic control power cutting device of a down-hole trackless rubber-tyred car, and solves the abrasion problem of a brake, a friction plate, a transmission shaft and the like in the travelling brake process of the current down-hole trackless rubber-tyred car. The hydraulic control power cutting device is composed of a valve body I, a valve body II, a valve body III, a directional operating valve, a shift operating valve and a power cutoff valve assembly, wherein the power cutoff valve assembly comprises a pressure adjusting part arranged in the cavity of the valve body VI, power cutoff parts arranged in the cavities of the valve body I and the valve body II, and a reset part. The hydraulic control power cutting device of the down-hole trackless rubber-tyred car in the invention has the beneficial effects that: 1, during travelling brake, components such as a travelling brake, a gearbox friction plate, a transmission shaft and the like can be effectively protected; 2, interlocking of the travelling brake and a gearbox clutch on operation can be realized; 3, output of a pressure with a constant valve from a right end of a hydraulic piston can be realized; and 4, the power cutting device has a more reasonable structure and better generality.
Description
Technical field
The invention belongs to a kind of power cut device of railless free-wheeled vehicle under the coal mine, be specifically related to a kind of down-hole railless free-wheeled vehicle hydraulic control type power cut device.
Background technology
The railless free-wheeled vehicle driving cycle is abominable under the coal mine, often need step on service braking pedal in the process of moving, but when stepping on service braking pedal, the power of change speed gear box does not cut off, engine power is just through tor-con, change speed gear box and the multiple deceleration of drive axle like this, and moment of torsion increases a lot, will increase the wearing and tearing of running brake, increase the wearing and tearing of change speed gear box friction lining and the wearing and tearing of whole drive system, What is more can cause the fracture of transmission shaft etc.
Top, ground adopts the loader of pneumatic jack hydraulic brake system to have service brake power cut function at present, but its brake system belongs to the braking of pneumatic jack liquid, utilize the gas promotion change speed gear box shutoff valve in the pneumatic jack liquid to cut off the shift control oil circuit, thereby cut off the output of change speed gear box power, realized the interlocking that service braking system and gear shift sleeve are handled.
Employed railless free-wheeled vehicle under the coal mine adopts full power hydraulic brake system more than 95%, if will realize the interlocking between running brake and the gear shift sleeve manipulation, just require a kind of change speed gear box power cut device with hydraulic control type function.
The down-hole railless free-wheeled vehicle of domestic production does not at present have change speed gear box power cut function.
Summary of the invention
The present invention is in order to solve the wear problems such as drg, friction lining and transmission shaft that railless free-wheeled vehicle is produced under the existing well in the driving braking procedure; a kind of down-hole railless free-wheeled vehicle hydraulic control type power cut device is provided; be used for when implementing service brake, cutting off the takeoff output of change speed gear box, with guard rows vehicle brake, change speed gear box friction lining and transmission shaft etc.
The present invention adopts following technical scheme to realize:
A kind of down-hole railless free-wheeled vehicle hydraulic control type power cut device, it comprises valve body I, valve body II, valve body III, reversing maneuver valve, shift control valve and power cut valve assembly;
Described power cut valve assembly comprise in pressure regulation part, valve body I and the valve body II chamber that is arranged in the valve body III chamber power cut partly and the part that resets in the valve body I chamber;
Described pressure-regulating portion branch comprises the pressure adjustment nut that is threaded with the valve body III, and the pressure adjustment nut connects an end of pressure spring, and the other end of pressure spring is connected on the limiting stopper of ledge structure,
Described power cut partly comprises the hydraulic valve core of T shape structure, the tail end of hydraulic valve core is threadedly connected on the contiguous block, the contiguous limiting stopper of the opposite side of contiguous block, hermetically-sealed construction is set on the contiguous block, have pressure oil delivery orifice T on the cooresponding valve body in the top of hydraulic valve core, the opposite side of pressure oil delivery orifice is a hydraulic piston, and the other end of hydraulic piston connects the power cut valve rod, is set with banking stop on the hydraulic piston;
Described reset portion branch comprises and the other end bonded assembly retracing spring of power cut valve rod that the other end of retracing spring is connected on the base;
The part of the corresponding hydraulic valve core of valve body III has oil inlet;
Described reversing maneuver valve comprises the commutation valve rod in the chamber II that is arranged at the valve body I,
Described shift control valve comprises the gearshift valve rod in the chamber III that is arranged at the valve body I,
The chamber I that the power cut valve rod is set is communicated with the chamber II by hydraulic fluid port B, hydraulic fluid port C, and the chamber I is communicated with the chamber III by hydraulic fluid port A; Hydraulic fluid port A, B, C are arranged in the stroke range of power cut valve rod, and the power cut valve rod is provided with the convex shoulder that can all cover hydraulic fluid port A, B, C.
The control pattern that the present invention cuts off change speed gear box power adopts fluid control, and promptly the P mouth enters hydraulic oil and controls; Owing to be provided with the pressure regulation part, the T mouth can be exported constant compression force, has guaranteed the normal operation of power cut valve rod 11; When cutting off power, adopt the power that cuts off reversing maneuver valve 12, the power of shift control valve 7 does not cut off.
The relative prior art of the present invention has following beneficial effect:
1, on the railless free-wheeled vehicle of down-hole, uses change speed gear box power cut function, when implementing service brake, effectively protected running brake, change speed gear box friction lining and transmission shaft etc.;
2, adopt fluid control to carry out the change speed gear box power cut, realized the interlocking on walking drg and the change speed gear box clutch control;
3, adopt the structure of pressure spring and pressure adjustment nut, realized the output of hydraulic piston 8 right-hand member definite value pressure;
4, structure of the present invention is more reasonable, and commonality is good, can directly use on existing WC5E, WC8E railless free-wheeled vehicle.
Description of drawings
Fig. 1 is a structural representation of the present invention
Fig. 2 is a schematic diagram of the present invention
Among the figure: 1-pressure adjustment nut, 2-valve body III, 3-pressure spring, 4-limiting stopper, the sealing of 5-Y shape, the 6-hydraulic valve core, 7-sealed nylon, 8-shift control valve, 9-hydraulic piston, the 10-lip packing, 11-banking stop, 12-power cut valve rod, 13-reversing maneuver valve, the 14-retracing spring, 15-base, 16-valve body I, 17-contiguous block, 18-valve body II, 19-drive pump, 20-filter, 21-brake activation valve, the 22-running brake, 23-hydraulic reservoir, T-pressure oil sprocket hole, P-oil inlet.
The specific embodiment
In conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
Hydraulic control type power cut device of the present invention comprises valve body I, valve body II, valve body III, reversing maneuver valve 13, shift control valve 8 and power cut valve assembly;
Described power cut component part, comprise pressure adjustment nut 1, pressure spring 3, limiting stopper 4, Y type sealing 5, sealed nylon 7, hydraulic valve core 6, hydraulic piston 9, banking stop 11, power cut valve rod 12,
Retracing spring 14, base 15, contiguous block 17.
Working process: (gearshift procedure): when declutch shift lever placed 1 P PARK Position P, shift control valve 8 was moved to the left a respective distance, from the transmission oil of drive pump 19 output through filter 20 from
After entering the valve body I, the circle aperture arrives valve stem tip on shift control valve 8, thereby enters the D1 chamber, and the D1 chamber leads to 1 grade of power-transfer clutch of change speed gear box, has realized railless free-wheeled vehicle advancing, retreating 1 grade of speed.When declutch shift lever when 1 grade changes to 2 grades, shift control valve 8 respective distance that moves right, the transmission oil of drive pump 19 outputs through filter 20 from
After entering the valve body I, the circle aperture is to valve stem tip on shift control valve 8, thereby enter the D2 chamber, the D2 chamber leads to 2 grades of power-transfer clutchs of change speed gear box, realized railless free-wheeled vehicle advancing, retreating 2 grades of speed, oil back chamber T1 chamber is connected in the D1 chamber simultaneously, has realized the separation of 1 grade of power-transfer clutch, has guaranteed can only have in gearshift procedure a change speed gear box power-transfer clutch to connect.Conversion principle between other gear is similar with it, adopts the steel ball location between each gear.
Working process: (commutation process): when the reversing maneuver valve rod placed forward position, reversing maneuver valve 13 was in position shown in Figure 1, from the transmission oil of drive pump 19 output through filter 20 from
After entering the valve body I, enter the B chamber through the A chamber, thereby enter the F1 chamber, the F1 chamber leads to the change speed gear box forward gear clutch, has realized the joint of forward gear clutch.When the reversing maneuver valve rod when forward position changes to the backward gear position, reversing maneuver valve 13 is moved to the left a respective distance, from the transmission oil of drive pump 19 outputs through filter 20 from
After entering the valve body I, enter the C chamber through the A chamber, thereby enter the F2 chamber, the F2 chamber leads to change speed gear box backward gear power-transfer clutch, realized the joint of backward gear power-transfer clutch, this moment, the oil suction chamber F1 of forward gear clutch was communicated with oil back chamber C1, had realized the separation of forward gear clutch, and having guaranteed to advance in commutation process and having fallen back to have a power-transfer clutch to connect.The principle that backward gear is transformed to D Drive is similar with it.In the time of in the middle of the reversing maneuver bar places D Drive and backward gear (steel ball location), F1 chamber and C1 chamber are connected, and F2 chamber and C2 chamber are connected, and forward gear clutch and backward gear power-transfer clutch all are in released state, and this moment, change speed gear box was in neutral state.
Working process (glancing impact power cut process): when the down-hole railless free-wheeled vehicle was stepped on brake pedal when driving, the pressure oil part of brake activation valve 21 outlets entered running brake 22, has realized the braking of railless free-wheeled vehicle; A part enters the P mouth (as shown in Figure 2) of power cut device, under the effect of pressure oil, contiguous block 17 moves right, under the effect of contiguous block 17, limiting stopper 4 moves right and compresses pressure spring 3, be threaded owing to adopt between contiguous block 17 and the hydraulic valve core 6, contiguous block 17 also drives hydraulic valve core 6 simultaneously and moves right, this moment T mouth pressure oil output, when hydraulic valve core 6 contacts with sealed nylon 7, this moment, the force value of T mouth also reached maximum, and force value equals the force value that pressure spring 3 sets, and was certain value.If need to adjust the force value of T mouth, can regulate by the amount of compression of rotation adjustment nut 1 and then adjusting pressure spring 3.The pressure oil of T mouth promotes hydraulic piston 9 and is moved to the left, and then propulsion power cuts off valve rod 12 and is moved to the left, and under the effect of power cut valve rod 12, this moment, the transmission oil in A chamber can not enter B chamber or C chamber, reversing maneuver valve 13 is in Neutral Position, has so just cut off the output of change speed gear box power.
Working process (power rejuvenation during brake off): when loosen the brake, the pressure oil in the running brake 22 flows back to hydraulic reservoir 23 through brake activation valve 21, has realized the releasing to the railless free-wheeled vehicle braking; The pressure oil of P mouth flows back to fuel tank rapidly in the device of power cut simultaneously, under the effect of pressure spring 3, hydraulic valve core 6 is moved to the left, gap between hydraulic valve core 6 and the sealed nylon 7 increases rapidly like this, the pressure oil of T mouth also flows back to the P mouth, under the effect of retracing spring 14, power cut valve rod 12 moves right, A chamber and B chamber and C chamber are connected, transmission oil enters B chamber and C chamber, reversing maneuver valve 13 is in D Drive or retreats shelves, the rapid outputting power of change speed gear box like this, and railless free-wheeled vehicle can move on or retreat.
Claims (1)
1. a down-hole railless free-wheeled vehicle hydraulic control type power cut device is characterized in that it comprises valve body I (16), valve body II (18), valve body III (2), reversing maneuver valve (13), shift control valve (8) and power cut valve assembly;
Described power cut valve assembly comprise in pressure regulation part, valve body I (16) and valve body II (18) chamber that is arranged in valve body III (2) chamber power cut partly and the part that resets in valve body I (16) chamber;
Described pressure-regulating portion branch comprises the pressure adjustment nut (1) that is threaded with valve body III (2), and pressure adjustment nut (1) connects an end of pressure spring (3), and the other end of pressure spring (3) is connected on the limiting stopper (4) of ledge structure,
Described power cut partly comprises the hydraulic valve core (6) of T shape structure, the tail end of hydraulic valve core (6) is threadedly connected on the contiguous block (17), the contiguous limiting stopper (4) of the opposite side of contiguous block (17), contiguous block is provided with hermetically-sealed construction on (17), have pressure oil delivery orifice (T) on the cooresponding valve body in top of hydraulic valve core (6), the opposite side of pressure oil delivery orifice (T) is hydraulic piston (9), the other end of hydraulic piston (9) connects power cut valve rod (12), is set with banking stop (11) on the hydraulic piston (9);
Described reset portion branch comprises the other end bonded assembly retracing spring (14) with power cut valve rod (12), and the other end of retracing spring (14) is connected on the base (15);
The part of the corresponding hydraulic valve core of valve body III (2) (6) has oil inlet (P);
Described reversing maneuver valve (13) comprises the commutation valve rod in the chamber II that is arranged at the valve body I,
Described shift control valve (8) comprises the gearshift valve rod in the chamber III that is arranged at the valve body I,
The chamber I that power cut valve rod (12) is set is communicated with the chamber II by hydraulic fluid port B, hydraulic fluid port C, and the chamber I is communicated with the chamber III by hydraulic fluid port A; Hydraulic fluid port A, B, C are arranged in the stroke range of power cut valve rod (12), and power cut valve rod (12) is provided with the convex shoulder that can all cover hydraulic fluid port A, B, C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110348085 CN102390372B (en) | 2011-11-07 | 2011-11-07 | Hydraulic control power cutting device of down-hole trackless rubber-tyred car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110348085 CN102390372B (en) | 2011-11-07 | 2011-11-07 | Hydraulic control power cutting device of down-hole trackless rubber-tyred car |
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| Publication Number | Publication Date |
|---|---|
| CN102390372A CN102390372A (en) | 2012-03-28 |
| CN102390372B true CN102390372B (en) | 2013-07-24 |
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| CN 201110348085 Active CN102390372B (en) | 2011-11-07 | 2011-11-07 | Hydraulic control power cutting device of down-hole trackless rubber-tyred car |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114537348B (en) * | 2022-01-26 | 2024-06-25 | 山东能源重装集团泰装工程装备制造有限公司 | Braking system of trackless rubber-tyred vehicle |
| CN115182941B (en) * | 2022-07-29 | 2024-05-17 | 中国煤炭科工集团太原研究院有限公司 | Self-adjusting power cut-off control device and system for explosion-proof vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1241259B (en) * | 1990-06-15 | 1993-12-29 | Graziano Trasmissioni S.P.A. | SLOW APPROACH VALVE ("INCHING") FOR HYDROKINETIC TRANSMISSIONS ("POWER-SHIFT"), PARTICULARLY FOR FORKLIFTS. |
| CN2617982Y (en) * | 2003-05-13 | 2004-05-26 | 浙江临海海宏集团有限公司 | Two front and one rear electric and hydraulic speed control valve |
| JP2007177821A (en) * | 2005-12-27 | 2007-07-12 | Nachi Fujikoshi Corp | Hydraulic drive unit |
| CN2934777Y (en) * | 2006-07-07 | 2007-08-15 | 浙江省三门江州机电有限公司 | Speed-changing operation valve improvement |
| KR100930118B1 (en) * | 2009-05-22 | 2009-12-07 | (주)엠에스정밀 | Integrated control valve for power shift transmission of forklift |
| CN201475303U (en) * | 2009-07-21 | 2010-05-19 | 杭州萧山叉车配件有限公司 | Variable-speed operation valve employing oil-saving nozzle device with dredging needle valve |
| CN201916475U (en) * | 2011-01-24 | 2011-08-03 | 山东郯工液压件制造有限公司 | Full-power gear-shifting gear box operating valve for loader |
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