CN202482016U - Diesel fork lift truck hydraulic system with safety protection mechanism - Google Patents
Diesel fork lift truck hydraulic system with safety protection mechanism Download PDFInfo
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- CN202482016U CN202482016U CN2012200953174U CN201220095317U CN202482016U CN 202482016 U CN202482016 U CN 202482016U CN 2012200953174 U CN2012200953174 U CN 2012200953174U CN 201220095317 U CN201220095317 U CN 201220095317U CN 202482016 U CN202482016 U CN 202482016U
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Abstract
The utility model relates to a diesel fork lift truck hydraulic system with a safety protection mechanism. The system comprises a multiple directional control valve, a steering gear, a steering cylinder, two titling cylinders, two lift cylinders, an oil pump and an oil tank, wherein the multiple directional control valve consists of an inlet valve block, a lift change valve block, a titling change valve block and an oil return valve block. The diesel fork lift truck hydraulic system with the safety protection mechanism has the improvements that a plug-in mounting-type hydraulic control one-way valve, an electromagnetic valve, a one-way valve and a manual unloading valve are additionally arranged in the lift change valve block and are used for realizing safety protection when a lift device descends; a pressure unloading valve and a two-position two-way electromagnetic valve are additionally arranged in the oil return valve block and are used for realizing safety protection for the lift and titling functions of a fork lift truck. The safety protection hydraulic system that the working device of the fork lift truck can stop working when an operator of the diesel fork lift truck is not at the correct driving position is realized by the utility model.
Description
Technical field
The utility model belongs to engineering truck hydraulic technique field, is specifically related to be used for the hydraulic efficiency pressure system of diesel fork lift truck.
Background technology
Along with the continuous development of fork truck technology, the security requirement of fork truck is increasingly high.The generally setting of domestic diesel fork lift truck hydraulic efficiency pressure system is that pump fuel feed is given equipment, satisfies fork truck and hoists and front and back bevelled need of work.If oil pump power is cut off, there is not hydraulic oil output, then hoist, tilt operation just is stopped, but forklift door frame leans on the operation of deadweight decline then not to be restricted.So in the carrying operating process; If bending to do other things, chaufeur is not sitting on the driver seat with correct posture; Or the people left the seat, and the fork truck equipment is worked under state out of control, causes the safety misadventure of personal injury and goods damage easily.Common diesel fork lift truck hydraulic efficiency pressure system comprises fuel tank, oil return oil filter, multiple directional control valve, deflector, turns to oil cylinder, dump ram, hoist cylinder, shutoff valve, governor valve and oil pump; On principle, can't realize that the operator of diesel fork lift truck correctly be not in steering position, the fork truck equipment is with out-of-work safety protection function.
Summary of the invention
In order to solve when the operator of diesel fork lift truck is not in correct steering position, realize the out-of-work problem of fork truck equipment, the utility model provides a kind of diesel fork lift truck hydraulic efficiency pressure system with safety protection mechanism.
The improvement technical scheme of the utility model is following:
Diesel fork lift truck with the hydraulic efficiency pressure system with safety protection mechanism comprise multiple directional control valve 3, deflector 5, turn to oil cylinder 6, two dump rams 10, two hoist cylinders 11, oil pump 17, fuel tank 1; Said multiple directional control valve 3 is made up of oil-feed valve block 4, the Reversing valve plate 7 that hoists, inclination Reversing valve plate 8 and oil return valve block 9; The input end of oil pump 17 connects fuel tank 1; The mouth of oil pump 17 connects the oil inlet P of multiple directional control valve 3; The branch hydraulic fluid port PF that turns to of multiple directional control valve 3 connects the oil inlet P 1 of deflector 5; The first actuator port A, the second actuator port B of said deflector 5 are connected to the actuator port that turns to oil cylinder 6 two ends respectively, and the oil return inlet T of oil return inlet T of deflector 51 and multiple directional control valve 3 is connected to fuel tank 1 through three return filters 2 that stimulate the menstrual flow; The first actuator port A1 of multiple directional control valve 3 connects governor valve 13, connects the oil inlet of two hoist cylinders 11 more respectively through three-way pipe, wherein has on the oil circuit of a hoist cylinder 11 to be in series with shutoff valve 12; The second actuator port A2 of multiple directional control valve 3, the 3rd actuator port B2 connect the rod chamber and the rodless cavity of two dump rams 10 respectively; Said oil-feed valve block 4 comprises monostable separating valve 14, main system safety overflow valve 16 and steering swivel system safety overflow valve 15; The said Reversing valve plate 7 that hoists comprises the change-over valve 21 that hoists, and the change-over valve 21 that hoists is three six-way valves, and its first actuator port C place is provided with inlet one-way valve 22.
The first actuator port C of the said Reversing valve plate 7 that hoists is communicated with the first actuator port F; The oil inlet of said inlet one-way valve 22 is being communicated with first four-way piece; Second mouth of pipe of first four-way piece is being communicated with the second oil inlet D of the change-over valve 21 that hoists; Second mouth of pipe of first four-way piece is being communicated with the unstable state oil-feed port CF of oil-feed valve block 4; The 4th mouth of pipe of first four-way piece is being communicated with an end of pressure oil circuit 23, and pressure oil circuit 23 is through inclination Reversing valve plate 8, and the other end of pressure oil circuit 23 is being communicated with the meta oil circuit of oil return valve block 9; Connecting on the pressure oil circuit 23 in the oil return valve block 9 oil inlet P 2 of pressure unloader valve 24; The control port S of pressure unloader valve 24 is connecting the first hydraulic fluid port N of electromagnetic valve 25, and the oil return inlet T 2 of pressure unloader valve 24 and the second hydraulic fluid port R of electromagnetic valve 25 are connected to system oil return road 18 through threeway; Said electromagnetic valve 25 is the unidirectional change-over valves by function of 2/2-way band, and when electromagnetic valve 25 must not be in electricity condition, first hydraulic fluid port N to the second hydraulic fluid port R connected; Electromagnetic valve 25 when electric, first hydraulic fluid port N to the second hydraulic fluid port R is obstructed;
The first actuator port F of the said change-over valve 21 that hoists is being communicated with second four-way piece; Second mouth of pipe of said second four-way piece is being communicated with the change-over valve 21 second actuator port H that hoist; The 3rd mouth of pipe of second four-way piece is being communicated with the oil outlet of second check valve 27, and the 4th mouth of pipe of second four-way piece is being communicated with the oil inlet I of plug-in hydraulic control one-way valve 28; The meta oil circuit 19 of the second return opening G through inclination Reversing valve plate 8 of change-over valve 21 of hoisting is being communicated with oil return line 18 with oil return valve block 9; The first hydraulic fluid port L that the oil inlet of second check valve 27 is connected to second electromagnetic valve 26 connects; The second hydraulic fluid port M of second electromagnetic valve 26 is connecting the oil inlet P 3 of control port K with the manual drain charge valve 29 of plug-in hydraulic control one-way valve 28 respectively through three-way pipe; The oil outlet J of plug-in hydraulic control one-way valve 28 is being communicated with the first actuator port A1 of multiple directional control valve 3, and manually the oil outlet T3 of drain charge valve 29 is connecting system oil return road 18; When the pressure of said plug-in hydraulic control one-way valve 28 oil inlet I was higher than oil outlet J, oil inlet I communicated to oil outlet J; When the pressure of said plug-in hydraulic control one-way valve 28 oil outlet J was higher than oil inlet I, control port K was communicated with oil return line 18, and oil outlet J communicates with oil inlet I, otherwise oil outlet J and oil inlet I break off; Said second electromagnetic valve 26 is the unidirectional change-over valves by function of 2/2-way band, and when second electromagnetic valve 26 was in power failure state, the second hydraulic fluid port M and the first hydraulic fluid port L of second electromagnetic valve 26 were obstructed; When electric, the second hydraulic fluid port M and first hydraulic fluid port L connection; When second electromagnetic valve 26 breaks down, manually be communicated with the oil inlet P 3 and oil outlet T3 of manual drain charge valve 29, make the control port K connected system oil return line 18 of plug-in hydraulic control one-way valve 28.
The useful technique effect of the utility model is following:
1. the utility model has been realized diesel fork lift truck when the operator correctly is not in steering position, and the fork truck equipment is with out-of-work safety guard-safeguard hydraulic efficiency pressure system;
2. with respect to the hydraulic efficiency pressure system of common diesel fork lift truck, in the valve block that hoists, increase check valve, 2/2-way electromagnetic valve, plug-in hydraulic control one-way valve, be used to the safety guard-safeguard of realizing that jack up unit descends;
3. with respect to the hydraulic efficiency pressure system of common diesel fork lift truck, in the oil return valve block, increased the hydraulic unloading valve, the 2/2-way electromagnetic valve is used to realize that fork truck hoists, the safety guard-safeguard of tilt function.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the prior art constructions scheme drawing.
Sequence number among the last figure: fuel tank 1; Return filter 2; Multiple directional control valve 3; Oil-feed valve block 4; Deflector 5; Turn to oil cylinder 6; Reversing valve plate 7 hoists; Inclination Reversing valve plate 8; Oil return valve block 9; Two dump rams 10; Two hoist cylinders 11; Shutoff valve 12; Governor valve 13; Monostable separating valve 14; Steering swivel system safety overflow valve 15; Main system safety overflow valve 16; Oil pump 17; System oil return road 18; Meta oil circuit 19; Change-over valve 21 hoists; Inlet one-way valve 22; Pressure oil circuit 23; Pressure unloader valve 24; Electromagnetic valve 25; Second electromagnetic valve 26; Second check valve 27; Plug-in hydraulic control one-way valve 28; Manual drain charge valve 29.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is done explanation further through embodiment.
Embodiment
Referring to Fig. 1, diesel fork lift truck with the hydraulic efficiency pressure system with safety protection mechanism comprise multiple directional control valve 3, deflector 5, turn to oil cylinder 6, two dump rams 10, two hoist cylinders 11, oil pump 17, fuel tank 1; Said multiple directional control valve 3 is made up of oil-feed valve block 4, the Reversing valve plate 7 that hoists, inclination Reversing valve plate 8 and oil return valve block 9; The input end of oil pump 17 connects fuel tank 1; The mouth of oil pump 17 connects the oil inlet P of multiple directional control valve 3; The branch hydraulic fluid port PF that turns to of multiple directional control valve 3 connects the oil inlet P 1 of deflector 5; The first actuator port A, the second actuator port B of said deflector 5 are connected to the actuator port that turns to oil cylinder 6 two ends respectively, and the oil return inlet T 1 of deflector 5 and the oil return inlet T of multiple directional control valve 3 are connected to fuel tank 1 through three-way pipe through return filter 2; The first actuator port A1 of multiple directional control valve 3 connects governor valve 13, connects the oil inlet of two hoist cylinders 11 more respectively through three-way pipe, wherein has on the oil circuit of a hoist cylinder 11 to be in series with shutoff valve 12; The second actuator port A2 of multiple directional control valve 3, the 3rd actuator port B2 connect the rod chamber and the rodless cavity of two dump rams 10 respectively.Oil-feed valve block 4 comprises monostable separating valve 14, main system safety overflow valve 16 and steering swivel system safety overflow valve 15.The Reversing valve plate 7 that hoists comprises the change-over valve 21 that hoists, and the change-over valve 21 that hoists is three six-way valves, and its first actuator port C place is provided with inlet one-way valve 22.
The first actuator port C of Reversing valve plate 7 of hoisting is communicated with the first actuator port F; The oil inlet of said inlet one-way valve 22 is being communicated with first four-way piece; Second mouth of pipe of first four-way piece is being communicated with the second oil inlet D of the change-over valve 21 that hoists; Second mouth of pipe of first four-way piece is being communicated with the unstable state oil-feed port CF of oil-feed valve block 4; The 4th mouth of pipe of first four-way piece is being communicated with an end of pressure oil circuit 23, and pressure oil circuit 23 is through inclination Reversing valve plate 8, and the other end of pressure oil circuit 23 is being communicated with the meta oil circuit of oil return valve block 9; Connecting on the pressure oil circuit 23 in the oil return valve block 9 oil inlet P 2 of pressure unloader valve 24; The control port S of pressure unloader valve 24 is connecting the first hydraulic fluid port N of electromagnetic valve 25, and the oil return inlet T 2 of pressure unloader valve 24 and the second hydraulic fluid port R of electromagnetic valve 25 are connected to system oil return road 18 through threeway; Said electromagnetic valve 25 is the unidirectional change-over valves by function of 2/2-way band, and when electromagnetic valve 25 must not be in electricity condition, first hydraulic fluid port N to the second hydraulic fluid port R connected; Electromagnetic valve 25 when electric, first hydraulic fluid port N to the second hydraulic fluid port R is obstructed.
The first actuator port F of change-over valve 21 of hoisting is being communicated with second four-way piece; Second mouth of pipe of said second four-way piece is being communicated with the change-over valve 21 second actuator port H that hoist; The 3rd mouth of pipe of second four-way piece is being communicated with the oil outlet of second check valve 27, and the 4th mouth of pipe of second four-way piece is being communicated with the oil inlet I of plug-in hydraulic control one-way valve 28; The meta oil circuit 19 of the second return opening G through inclination Reversing valve plate 8 of change-over valve 21 of hoisting is being communicated with system oil return road 18 with oil return valve block 9; The first hydraulic fluid port L that the oil inlet of second check valve 27 is connected to second electromagnetic valve 26 connects; The second hydraulic fluid port M of second electromagnetic valve 26 is connecting the oil inlet P 3 of control port K with the manual drain charge valve 29 of plug-in hydraulic control one-way valve 28 respectively through three-way pipe; The oil outlet J of plug-in hydraulic control one-way valve 28 is being communicated with the first actuator port A1 of multiple directional control valve 3, and manually the oil outlet T3 of drain charge valve 29 is connecting system oil return road 18; When the pressure of said plug-in hydraulic control one-way valve 28 oil inlet I was higher than oil outlet J, oil inlet I communicated to oil outlet J; When the pressure of said plug-in hydraulic control one-way valve 28 oil outlet J was higher than oil inlet I, control port K was communicated with oil return line 18, and oil outlet J communicates with oil inlet I, otherwise oil outlet J and oil inlet I break off; Said second electromagnetic valve 26 is the unidirectional change-over valves by function of 2/2-way band, and when second electromagnetic valve 26 was in power failure state, the second hydraulic fluid port M and the first hydraulic fluid port L of second electromagnetic valve 26 were obstructed; When electric, the second hydraulic fluid port M and first hydraulic fluid port L connection; When second electromagnetic valve 26 breaks down, manually be communicated with the oil inlet P 3 and oil outlet T3 of manual drain charge valve 29, make the control port K connected system oil return line 18 of plug-in hydraulic control one-way valve 28.
The concrete principle of work of the utility model is following: when the operator correctly is in steering position; Start vehicle; The electromagnetic valve 25 and second electromagnetic valve 26 get electric, and oil pump 17 pumps into the multiple directional control valve oil inlet P from fuel tank 1 oil suction with hydraulic oil; Fluid is supplied with deflector 5 work, all the other flow supply pressure oil circuits 23 with the fluid about 12ml through turning to shunting hydraulic fluid port PF through monostable separating valve 14.When the operator did not operate multiple directional control valve 3, pressure oil circuit 23 had been communicated with system oil return road 18, got back to fuel tank 1 through return filter 2 again.When fork truck need carry out equipment when hoisting; Operator's change-over valve 21 that will hoist switches to left side position; Pressure oil is through the first oil inlet C of inlet one-way valve 22 to the change-over valve 21 that hoists, and the first actuator port F through the change-over valve 21 that hoists connects the second actuator port H of the change-over valve 21 that hoists, the oil outlet of second check valve 27 and the oil inlet I of plug-in hydraulic control one-way valve 28 respectively to four-way piece again.The second actuator port H mouth of change-over valve 21 of hoisting this moment breaks off; Second check valve 27 is owing to be that oil outlet bears pressure; It also is closed condition; Pressure oil is communicated with the first actuator port A1 of oil outlet J to multiple directional control valve 3 through plug-in hydraulic control one-way valve 28 oil inlet I, arrives the oil inlet of two hoist cylinders 11 again through governor valve 13, shutoff valve 12, has realized that the equipment of fork truck hoists.When needs carry out the equipment step-down operation; Operator's change-over valve 21 that will hoist switches to right position; The second oil inlet D of pressure oil this moment through the change-over valve 21 that hoists connects the second oil outlet G and is connected to system oil return road 18 again; The pressure oil of two hoist cylinders 11 arrives the oil outlet J of plug-in hydraulic control one-way valve 28 through shutoff valve 12, governor valve 13; The control port K of plug-in hydraulic control one-way valve 28 is connected the first actuator port F and the second actuator port H of the change-over valve 21 that hoists through second electromagnetic valve 26 with second check valve 27, the first actuator port F of the change-over valve 21 that hoists this moment is communicated with the first return opening E with the second actuator port H mouth and is being connected system oil return road 18; Pressure oil backs down plug-in hydraulic control one-way valve 28 and carries out oil return through system oil return road 18, accomplishes the decline of the equipment of fork truck.
When the operator correctly was not in steering position, no matter whether vehicle started, electromagnetic valve 25 and second electromagnetic valve, 26 equal dead electricity.When vehicle is not activated; Because hydraulic efficiency pressure system does not have the pressure oil supply, equipment hoists, tilts and all can't operate, when carrying out step-down operation; The pressure oil of two hoist cylinders 11 arrives the oil outlet J mouth of plug-in hydraulic control one-way valve 28 through governor valve 13; The control port K of plug-in hydraulic control one-way valve 28 connects the second hydraulic fluid port M mouth of second electromagnetic valve 26, because second electromagnetic valve, 26 dead electricity, the M mouth is obstructed to the L mouth; The J mouth of plug-in hydraulic control one-way valve 28 and I mouth break off, so step-down operation also can't be carried out.When vehicle is in starting state, when the operator correctly is not in steering position, because electromagnetic valve 25 dead electricity; N mouth to R mouth is connected, the control mouth S connected system oil return line 18 of pressure unloader valve 24, and the P2 mouth of pressure unloader valve 24 is communicated with for 2 mouthfuls with oil return inlet T; Cause pressure oil circuit 23 to be communicated with system oil return road 18; The whole off-loads of the fuel feeding of Hydraulic Pump are so even the operator operates multiway valve, its equipment also can't be worked.
In sum, the hydraulic efficiency pressure system of the utility model diesel fork lift truck is worked if desired, must possess two conditions: the first, and operating personal must correct being on the steering position.The second, vehicle has been in the state of startup.
Claims (1)
1. the diesel fork lift truck hydraulic efficiency pressure system that has safety protection mechanism comprises multiple directional control valve (3), deflector (5), turns to oil cylinder (6), two dump rams (10), two hoist cylinders (11), oil pump (17), fuel tank (1); Said multiple directional control valve (3) is made up of oil-feed valve block (4), the Reversing valve plate that hoists (7), inclination Reversing valve plate (8) and oil return valve block (9); The input end of oil pump (17) connects fuel tank (1); The mouth of oil pump (17) connects the oil inlet P of multiple directional control valve 3; The branch hydraulic fluid port PF that turns to of multiple directional control valve (3) connects the oil inlet P 1 of deflector (5); The first actuator port A, the second actuator port B of said deflector (5) are connected to the actuator port that turns to oil cylinder (6) two ends respectively, and the oil return inlet T of the oil return inlet T 1 of deflector (5) and multiple directional control valve (3) is connected to fuel tank (1) through three return filters (2) that stimulate the menstrual flow; The first actuator port A1 of multiple directional control valve (3) connects governor valve (13), connects the oil inlet of two hoist cylinders (11) more respectively through three-way pipe, wherein has on the oil circuit of a hoist cylinder (11) to be in series with shutoff valve (12); The second actuator port A2 of multiple directional control valve (3), the 3rd actuator port B2 connect the rod chamber and the rodless cavity of two dump rams (10) respectively; Said oil-feed valve block (4) comprises monostable separating valve (14), main system safety overflow valve (16) and steering swivel system safety overflow valve (15); The said Reversing valve plate that hoists (7) comprises the change-over valve that hoists (21), and the change-over valve that hoists (21) is three six-way valves, and its first actuator port C place is provided with inlet one-way valve (22); It is characterized in that:
The first actuator port C of the said Reversing valve plate that hoists (7) is communicated with the first actuator port F; The oil inlet of said inlet one-way valve (22) is being communicated with first four-way piece; Second mouth of pipe of first four-way piece is being communicated with the second oil inlet D of the change-over valve that hoists (21); Second mouth of pipe of first four-way piece is being communicated with the unstable state oil-feed port CF of oil-feed valve block (4); The 4th mouth of pipe of first four-way piece is being communicated with an end of pressure oil circuit (23), and pressure oil circuit (23) is through inclination Reversing valve plate (8), and the other end of pressure oil circuit (23) is being communicated with the meta oil circuit of oil return valve block (9); Connecting on the pressure oil circuit (23) in the oil return valve block (9) oil inlet P 2 of pressure unloader valve (24); The control port S of pressure unloader valve (24) is connecting the first hydraulic fluid port N of electromagnetic valve (25), and the second hydraulic fluid port R of the oil return inlet T 2 of pressure unloader valve (24) and electromagnetic valve (25) is connected to system oil return road 18 through threeway; Said electromagnetic valve (25) is the unidirectional change-over valve by function of 2/2-way band, and when electromagnetic valve (25) must not be in electricity condition, first hydraulic fluid port N to the second hydraulic fluid port R connected; Electromagnetic valve (25) when electric, first hydraulic fluid port N to the second hydraulic fluid port R is obstructed;
The first actuator port F of the said change-over valve that hoists (21) is being communicated with second four-way piece; Second mouth of pipe of said second four-way piece is being communicated with change-over valve (21) the second actuator port H that hoist; The 3rd mouth of pipe of second four-way piece is being communicated with the oil outlet of second check valve (27), and the 4th mouth of pipe of second four-way piece is being communicated with the oil inlet I of plug-in hydraulic control one-way valve (28); Meta oil circuit (19) and the oil return valve block (9) of the second return opening G through inclination Reversing valve plate (8) of change-over valve (21) of hoisting is being communicated with oil return line (18); The first hydraulic fluid port L that the oil inlet of second check valve (27) is connected to second electromagnetic valve (26) connects; The second hydraulic fluid port M of second electromagnetic valve (26) is connecting the oil inlet P 3 of control port K with the manual drain charge valve (29) of plug-in hydraulic control one-way valve (28) respectively through three-way pipe; The oil outlet J of plug-in hydraulic control one-way valve (28) is being communicated with the first actuator port A1 of multiple directional control valve (3), and manually the oil outlet T3 of drain charge valve (29) is connecting system oil return road (18); When the pressure of said plug-in hydraulic control one-way valve (28) oil inlet I was higher than oil outlet J, oil inlet I communicated to oil outlet J; When the pressure of said plug-in hydraulic control one-way valve (28) oil outlet J was higher than oil inlet I, control port K was communicated with oil return line (18), and oil outlet J communicates with oil inlet I, otherwise oil outlet J and oil inlet I break off; Said second electromagnetic valve (26) is the unidirectional change-over valve by function of 2/2-way band, and when second electromagnetic valve (26) when being in power failure state, the second hydraulic fluid port M and the first hydraulic fluid port L of second electromagnetic valve (26) are obstructed; When electric, the second hydraulic fluid port M and first hydraulic fluid port L connection; When second electromagnetic valve (26) when breaking down, manually be communicated with the oil inlet P 3 and oil outlet T3 of manual drain charge valve (29), make the control port K connected system oil return line (18) of plug-in hydraulic control one-way valve (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200953174U CN202482016U (en) | 2012-03-14 | 2012-03-14 | Diesel fork lift truck hydraulic system with safety protection mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200953174U CN202482016U (en) | 2012-03-14 | 2012-03-14 | Diesel fork lift truck hydraulic system with safety protection mechanism |
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| CN202482016U true CN202482016U (en) | 2012-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200953174U Expired - Lifetime CN202482016U (en) | 2012-03-14 | 2012-03-14 | Diesel fork lift truck hydraulic system with safety protection mechanism |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996553A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN105711577A (en) * | 2016-04-27 | 2016-06-29 | 齐世勇 | Hydraulic assistant device of automobile brake and oil separation valve |
| CN107053980A (en) * | 2017-04-21 | 2017-08-18 | 石家庄铁道大学 | Combined snow removing vehicle hydraulic system |
| CN107059753A (en) * | 2017-04-21 | 2017-08-18 | 石家庄铁道大学 | Combined snow sweeper |
| CN108298475A (en) * | 2018-02-10 | 2018-07-20 | 刘剑 | The pallet fork control device of fork truck |
| CN113371646A (en) * | 2020-02-25 | 2021-09-10 | 林德（中国）叉车有限公司 | Safety control method and device for forklift |
| CN115898987A (en) * | 2022-12-22 | 2023-04-04 | 杭叉集团股份有限公司 | Multi-working-condition safety pressure-adjustable forklift hydraulic system |
-
2012
- 2012-03-14 CN CN2012200953174U patent/CN202482016U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996553A (en) * | 2012-11-27 | 2013-03-27 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN102996553B (en) * | 2012-11-27 | 2015-06-10 | 三一重工股份有限公司 | Support leg hydraulic system and engineering machinery |
| CN105711577A (en) * | 2016-04-27 | 2016-06-29 | 齐世勇 | Hydraulic assistant device of automobile brake and oil separation valve |
| CN107053980A (en) * | 2017-04-21 | 2017-08-18 | 石家庄铁道大学 | Combined snow removing vehicle hydraulic system |
| CN107059753A (en) * | 2017-04-21 | 2017-08-18 | 石家庄铁道大学 | Combined snow sweeper |
| CN107059753B (en) * | 2017-04-21 | 2018-07-24 | 石家庄铁道大学 | Combined snow sweeper |
| CN108298475A (en) * | 2018-02-10 | 2018-07-20 | 刘剑 | The pallet fork control device of fork truck |
| CN113371646A (en) * | 2020-02-25 | 2021-09-10 | 林德（中国）叉车有限公司 | Safety control method and device for forklift |
| CN115898987A (en) * | 2022-12-22 | 2023-04-04 | 杭叉集团股份有限公司 | Multi-working-condition safety pressure-adjustable forklift hydraulic system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20121010 |