CN103848374A - Hydraulic safety system for manual fork truck - Google Patents
Hydraulic safety system for manual fork truck Download PDFInfo
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- CN103848374A CN103848374A CN201410108004.1A CN201410108004A CN103848374A CN 103848374 A CN103848374 A CN 103848374A CN 201410108004 A CN201410108004 A CN 201410108004A CN 103848374 A CN103848374 A CN 103848374A
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Abstract
The invention discloses a hydraulic safety system for a manual fork truck. A pressure compensation speed governing assembly is arranged. The hydraulic safety system for the manual fork truck comprises a manual pump, an oil chamber and an ejector assembly, and also comprises the pressure compensation speed governing assembly used for preventing the occurrence of an accident to instantaneously fall, a manual operation reversing assembly which is provided with a locking function and is used for adjusting the liquid flow direction to change the working state of the system and an overflow assembly used for preventing overload; the pressure compensation speed governing assembly is respectively communicated with the ejector assembly and the manual operation reversing assembly; the manual pump is respectively communicated with the manual operation reversing assembly and the overflow assembly; the overflow assembly is communicated with the manual operation reversing assembly. The hydraulic safety system for the manual fork truck has the effects of automatically limiting speed and flow, the descent speed is automatically limited to a set value, even if misoperation carelessly happens, an oil cylinder cannot drop rapidly, the slow descent effect is realized, and the system is safe; due to the adoption of the manual operation reversing assembly, the descent speed is controllable, the flow of a cone-shaped one-way valve can be manually controlled, and the aim of controllable speed is achieved; the design of the overflow assembly is capable of preventing overload, a vehicle is prevented from being damaged under the overload, and the service life of the device is ensured. The hydraulic safety system for the manual fork truck belongs to the technical field of mechanical equipment.
Description
Technical field
The invention belongs to hand-hydraulic forklift technical field, also claim hand-hydraulic carrier-and-stacker, or claim manual hydraulic tray forklift, also have title hand fork lifter, be commonly called as manual forklift, relate in particular to its core liquid pressing system safety method of this type of manual forklift.
Background technology
Manually forklift is taking manpower as propulsion source, possesses and hoists, stacking and closely carry function, belongs to a kind of non-powered industrial truck, and its work that hoists is mainly to drive hydraulic hoist unit to complete by manpower, the similar and hydraulic jack of this hydraulic efficiency gear, and this hydraulic efficiency gear is generally by fuel tank, pump, valve, oil cylinder is waited until composition, and the principle of work of pump is: hand or foot-operated pump rod is depressed, pump rod return relies on spring, and it is a stroke that pump rod makes a round trip, and arranges, once, this hydraulic power source that is this hydraulic efficiency pressure system, if operate the wherein valve rod of control cock, the rising of feasible system in oil suction, suspend, decline wait until operating mode, if again in conjunction with vehicle other zero, parts, as: wheel, chassis door frame, goods shelf, pallet fork, chain, rollers etc., form a set of complete machinery, hydraulic pressure lift mobile device, realization hoists, decline and mobile function, due to without extra power, be widely used, bearing capacity is large, economy is sturdy again, is the general a kind of stacking of application, handbarrow vehicle.
But in the hydraulic efficiency pressure system of existing manual forklift without any current limliting, speed-limit device, when goods is by fluid power jacking during to eminence, unless you give your whole attention to it or occur when maloperation, hydraulic oil in oil cylinder is back to rapidly fuel tank, oil cylinder is now owing to losing the support of fluid power, there is potential energy now to act on oil cylinder and hold in the weight of the certain altitude that originally hoisted, weight can push oil cylinder tenesmus with free falling body state, goods immediately falls downwards from eminence, gently damage goods or facility, heavy fatal accident occurs, there is very large potential safety hazard.
Governor valve technology in fork truck is exactly the device that prevents accidental falling, as the China Patent No. Chinese patent that is CN2009201190510, a kind of governor valve, it includes valve body, spool, spring, wherein in valve body, valve pocket is provided with spool and spring, one end of valve body is set to connect the oil inlet of oil cylinder, the other end of valve body is sealedly connected with joint, spool outside is set with valve pocket, valve pocket is opened center cavity near one end of oil inlet, center cavity side-wall hole, be communicated with by the supermedial valve port of the diversion cavity between valve pocket and valve pocket and valve pocket, valve port is by the fuel feed hole on spool face, be communicated with the center cavity of spool, the center cavity of spool is provided with throttle plate near one end of joint, spring supporting is between spool and joint, its principle by reducing valve and flow regulating valve unites two into one, working stability, flow is subject to load effect little, velocity amplitude can effectively control the decline of fork truck even load time, thereby ensure that fork truck is in the time placing the load promoting, fall reposefully.
The Chinese patent that and for example China Patent No. is CN201320101597X, fork truck safety speed-limit valve, comprise valve body and valve gap, valve gap is spirally connected and is fixed on valve body, is inserted with valve pocket in valve body, in valve pocket, be inserted with spool, spring one end is pressed on valve gap, the other end is pressed on spool, and spool upper sleeve has flow-stopping plate, and collar is fastened on spool, collar is being pressed flow-stopping plate, and flow-stopping plate is pressed on the spool step of spool; The rear portion, center spool hole of spool forms inclined-plane, and steel ball is placed in the rear portion in center spool hole, and the rear portion of spool forms side direction cylindrical void and connects mutually with the valve pocket centre hole of valve pocket; On valve pocket, form valve pocket main oil-hole and connect mutually with the spool main oil-hole of spool, spool main oil-hole connects mutually with center spool hole.It can guarantee that fork truck oil return speed is steady, and the speed of fork truck oil-feed is simultaneously quick.
But a kind of governor valve of the above and fork truck safety speed-limit valve, have 4 weak points: 1, need the check valve of one group of bypass so that forward fluid can proper flow, backflow fluid can be cut off, again and Ling She mono-tunnel for the oil circuit of flow regulating valve; 2, complex structure, the number of components of composition is more, easy break-down; 3, must be external, connect to be applicable to pipeline, also take the limited inner space of vehicle; 4, fork truck is again powered industrial truck, and its hydraulic power source is provided by power system, so such technology is not suitable for non-powered industrial truck, is more not suitable for manual forklift hydraulic efficiency pressure system.
In sum, prior art also cannot reach compact conformation and prevent the generation of accidental falling; Prior art is easily overload by mistake also, fragile device.
Summary of the invention
Technical matters to be solved by this invention is: a kind of manually forklift hydraulic safe system is provided, can realizes automatic current limiting, speed limit, prevent that accidental falling from occurring; Avoid overload, ensure serviceability and the service life of hydraulic efficiency pressure system, also take into account compact conformation simultaneously.
The technical solution used in the present invention is: a kind of manually forklift hydraulic safe system, comprise Manpowered pump, oil cabinet, ejection assembly, also comprise preventing unexpected generation and pressure compensation speed governing assembly that moment falls, possessing the overflow assembly that latch functions and regulator solution flow path direction change the manual reverse of direction assembly of system health and prevent overload; Described pressure compensation speed governing assembly is communicated with ejection assembly and manual reverse of direction assembly respectively; Described Manpowered pump is communicated with manual reverse of direction assembly and overflow assembly respectively, and overflow assembly is communicated with manual reverse of direction assembly.
Described pressure compensation speed governing assembly comprises throttle valve body, throttling valve core, spring, throttling valve core is cup-shaped, throttling valve core right-hand member is provided with an axial cutoff port, and throttling valve core is enclosed within on spring, and throttling valve core and spring are engaged in throttle valve body and can do reciprocating; The flow regulating valve axially extending bore of throttle valve body right-hand member is communicated with ejection assembly; Flow regulating valve body wall is provided with the cutoff port intersecting with throttling valve core sense of motion, and cutoff port is communicated with manual reverse of direction assembly.
Described throttle valve body left end forms the 4th fluid chamber, and described throttle valve body right-hand member forms the 5th fluid chamber.
Described manual reverse of direction assembly, comprise successively from left to right left valve barrel, cone valve spring, poppet valve core, middle valve body, steel ball, right valve barrel, valve rod spring, valve rod composition, be same axis arranged, cone valve spring, poppet valve core and left valve barrel form one group of check valve, middle valve body, steel ball form another group check valve, right valve barrel, valve rod spring, valve rod composition control mechanism; Cone small end and the steel ball of poppet valve core are all arranged in valve body; Poppet valve core and steel ball are for controlling the unlatching at two ends, valve body left and right or closing; Valve rod is used for promoting steel ball motion; Fluid cavity is communicated with Manpowered pump.
Between described steel ball and valve rod, be provided with stroke gap.
Described overflow assembly is the straight ejector half by pass valve of ball formula.
The valve body front portion of described by pass valve is overflow ball, and middle part is overflow spring, and afterbody is provided with the micrometer adjusting screw that regulates pressure.
Described Manpowered pump is single pole or the reciprocating single acting pump of two bar.
Described Manpowered pump application of force form is that hand is pulled, foot-operated two-in-one mechanism, or independent hand trigger structure, or independent footstep mechanism.
Described ejection assembly is oil cylinder, and described cylinder structure is plunger tpe or piston type.
The invention has the beneficial effects as follows: the present invention is provided with pressure compensation speed governing assembly, possess automatic current limiting, speed limit, descending speed is by automatic speed-limiting to setting value, even if accidentally there is maloperation, oil cylinder also can not decline rapidly, play the slow effect of falling, native system is safe, 2, the design of manual reverse of direction assembly, and descending speed is controlled, uninterrupted that can manual control cone shaped one-way valve, the controlled object of the speed that reaches; 3, the design of overflow assembly has anti-overload dress, the lower damage of avoiding overloading of protection car, the service life of assurance device.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention.
In figure, 1, Manpowered pump, 2, middle valve body, 3, cone valve spring, 4, manual reverse of direction assembly, 5, poppet valve core, 6, left valve barrel, 7, throttle valve body, 8, pressure compensation speed governing assembly, 9, spring, 10, throttling valve core, 10.1, flow regulating valve axially extending bore, 11, ejection assembly, 12, oil cabinet, 13, valve rod spring, 14, valve rod, 15, right valve barrel, 16, overflow assembly, 16.1, micrometer adjusting screw, 16.2, overflow spring.16.3 overflow balls, 17, steel ball, a, the first fluid chamber, b, the second fluid chamber, c, the 3rd fluid chamber, d, cutoff port, e, the 4th fluid chamber, f, the 5th fluid chamber.
Detailed description of the invention
Shown in Figure 1, a kind of manually forklift hydraulic safe system, comprise Manpowered pump 1, oil cabinet 12, ejection assembly 11, also comprise preventing unexpected generation and pressure compensation speed governing assembly 8 that moment falls, possessing the overflow assembly 16 that latch functions and regulator solution flow path direction change the manual reverse of direction assembly 4 of system health and prevent overload; Described pressure compensation speed governing assembly 8 is communicated with ejection assembly 11 and manual reverse of direction assembly 4 respectively; Described Manpowered pump 1 is communicated with manual reverse of direction assembly 4 and overflow assembly 16 respectively, and overflow assembly 16 is communicated with manual reverse of direction assembly 4.
Pressure compensation orifice union 8, as its name suggests, is according to the pressure height of internal system adjusting joint hydraulic fluid port size keep a kind of Intelligent throttle valve of constant flow voluntarily, can stop fluid moment to be flow through in a large number, and current limliting speed limit, prevents accidental falling.
Manual reverse of direction assembly 4, not only meet the commutation of liquid stream and change system works filling, and poppet valve core 3 is unidirectional locking spool and flow regulating spool, the displacement that changes poppet valve core 5 can change the size of backflow hydraulic fluid port, and return flow is directly relevant through hydraulic fluid port size with institute, by the adjusting of poppet valve core 5, makes flow and speed reach controlled object, the present invention is simple in structure, easily manufactured.
Described pressure compensation speed governing assembly 8 comprises throttle valve body 7, throttling valve core 10, spring 9, throttling valve core 10 is cup-shaped, throttling valve core 10 right-hand members are provided with a flow regulating valve axially extending bore 10.1, throttling valve core 10 is enclosed within on spring 9, and throttling valve core 10 and spring 9 are engaged in throttle valve body 7 and can do reciprocating; Throttling valve core 10 and spring 9 crank motions refer to, spring 9 one end and throttling valve core 10 offset, and spring 9 other ends and throttle valve body 7 inwalls are inconsistent, under the effect of spring 9, can realize reset function; The flow regulating valve axially extending bore 10.1 of throttling valve core 10 right-hand members is communicated with ejection assembly 11; Throttle valve body 7 walls are provided with the cutoff port d intersecting with throttling valve core 10 sense of motions, and cutoff port d is communicated with manual reverse of direction assembly 4.
Described throttle valve body 7 left ends form the 4th fluid chamber e, and described throttle valve body 7 right-hand members form the 5th fluid chamber f.
Described manual reverse of direction assembly 4, comprise successively that from left to right left valve barrel 6, cone valve spring 3, poppet valve core 5, middle valve body 2, steel ball 17, right valve barrel 15, valve rod spring 13, valve rod 14 form, be same axis arranged, cone valve spring 3, poppet valve core 5 form one group of check valve with left valve barrel 6, middle valve body 2, another group check valve of steel ball 17 compositions, right valve barrel 15, valve rod spring 13, valve rod 14 composition control mechanisms; Cone small end and the steel ball 17 of poppet valve core 5 are all arranged in valve body 2; Poppet valve core 5 and steel ball 17 are for controlling the unlatching at valve body 2 two ends, left and right or closing; Valve rod 14 moves for promoting steel ball 17; Fluid cavity is communicated with Manpowered pump 1.
Between described steel ball 17 and valve rod 14, be provided with stroke gap.Described gap is the distance between B, 2 instructions of C as shown in Figure 1.Distance between described B, C two indication points can specify according to actual needs voluntarily.
Described overflow assembly 16 is the straight ejector half by pass valve of ball formula, be followed successively by from left to right the straight ejector half by pass valve of ball formula that overflow ball 16.3, overflow spring 16.2, micrometer adjusting screw 16.1 form, front portion is overflow ball 16.3, middle part is overflow spring 16.2, make overflow ball 16.3 be close to all the time on valve body sealing surface at ordinary times and be sealing state, overflow spring 16.2 afterbodys are provided with the micrometer adjusting screw 16.1 that regulates pressure.By regulating the position of micrometer adjusting screw 16.1, change the balancing force of overflow spring 16.2 in valve, thereby set the value of response pressure.
Described Manpowered pump 1 is single pole or the reciprocating single acting pump of two bar.Manpower oil extraction of lower time, the oil suction when spring at Manpowered pump 1 place drives pump rod to reset, it is a stroke that pump rod makes a round trip, and arrange, oil suction once, its application of force form is preferably hand and pulls, rides two-in-one mechanism, can be also to adopt single hand-operated mechanism, can be also single footstep mechanism.
Described Manpowered pump 1 application of force form is that hand is pulled, foot-operated two-in-one mechanism.
Described ejection assembly 11 is oil cylinder, and described cylinder structure is plunger tpe or piston type.
Principle of work of the present invention is:
One, the process that hoists:
1, under initial condition, valve rod 14 resets under the effect of its valve rod spring 13, and left end is in B position, and prerequisite is non-contravention steel ball 17, in the time that Manpowered pump 1 is made oil suction operating mode, form negative pressure in the second fluid chamber b, poppet valve core 5 is in closed condition under its cone valve spring 3 effects, and steel ball 17 is because suction function is opened automatically, hydraulic oil is from the oil cabinet 12 first fluid chamber a that flows through, through the second fluid chamber b, finally suck in Manpowered pump 1 again, complete oil-absorbing process.
2, in the time that Manpowered pump 1 is made oil extraction operating mode, the second fluid chamber b pressure raises, being promoted steel ball 17 by forward hydraulic oil moves to right until close, and poppet valve core 5 is open, hydraulic oil flows to into the 3rd fluid chamber c, again through cutoff port d, the 4th fluid chamber e, flow regulating valve axially extending bore 10.1 and the 5th fluid chamber f, finally be delivered in ejection assembly 11 (oil cylinder), make ejection assembly 11 (oil cylinder) motion that hoists, thereby drive external loading to rise together, this crosses intermediate range throttling valve core 10 by relying on the right under spring and the double acting of liquid stream, d fuel-economizing hole is in full-gear, without throttling action, Manpowered pump 1 due to what match, discharge oil mass is few, flow regulating valve axially extending bore 10.1 is under less flow and works, do not play equally throttling action.
Two, tentative process:
Promote in the direction of arrows valve rod 14, when left end is during in C position, steel ball 17 is micro-steel ball sealing face that moves and leave middle valve left, but do not touch poppet valve core 5, now the first fluid chamber a, the second b bis-chambeies, fluid chamber communicates, thereby Manpowered pump 1 is communicated with oil cabinet 12, the hydraulic oil that Manpowered pump 1 sucks is drained back to oil cabinet 12 by Manpowered pump 1 again, simultaneously poppet valve core 5 under the effect of cone valve spring 3 still in closing lock status, the interior hydraulic pressure oil mass of ejection assembly 11 (oil cylinder) does not does not also increase and decrease, ejection assembly 11 (oil cylinder) attonity, and make external loading also keep quiescence.
Three, decline and speed are controlled
Press the direction of arrow in figure and continue to promote valve rod 14, left end props up steel ball 17 and promotes steel ball 17 and continues to be moved to the left until touch the right-hand member of poppet valve core 5, now poppet valve core 5 is opened, ejection assembly 11 (oil cylinder) does return motion under the effect of external loading potential energy, hydraulic oil in its ejection assembly 11 (oil cylinder) flows back into oil cabinet 12 through the 5th fluid chamber f, flow regulating valve axially extending bore 10.1, the 4th fluid chamber e, cutoff port d, the 3rd fluid chamber c, the second fluid chamber b, the first fluid chamber a, completes decline process.
Descending speed is to open relevantly with displacement left with poppet valve core 5, and namely displacement is more, and hydraulic fluid port is also large, and flow is just more, and speed is just faster, and vice versa, and the displacement of poppet valve core 5 can reach by the displaced position of manual control valve rod 14.
Four, falling proof device
Automatic speed-limiting is automatically to be completed by pressure compensation speed governing assembly 8, pressure compensation speed governing assembly 8 is made up of throttling valve core 10 and spring 9, the 5th fluid chamber f directly communicates with ejection assembly 11 (oil cylinder), and the interior pressure size of ejection assembly 11 (oil cylinder) is determined by external loading size, in oil return process, to there is difference of pressure in flow regulating valve axially extending bore 10.1 both sides, thereby promoting throttling valve core 10 moves to left, impel cutoff port d to diminish, flow velocity is slack-off, be fed back to again the 4th fluid chamber e and the 5th f two chambeies, fluid chamber, so the power on throttling valve core 10 both sides produces new equilibrium point, make throttling valve core 10 keep current relative position, the area of cutoff port d is also stabilized in suitable size simultaneously, displacement and hydraulic fluid port no longer change, thereby make flow keep invariable and not affected by load weight or pressure size, finally make ejection assembly 11 (oil cylinder) do slow decreasing motion and speed keeps invariable, stop the possibility declining rapidly, reach fall arrest object.
Five, overload protection:
Pressure in the time that goods overloads in ejection assembly 11 (oil cylinder) also increases, through system oil-way, the 3rd fluid chamber c internal pressure is also increased, the application force that acts on poppet valve core 5 back sides also increases, and when working, Manpowered pump 1 inputs the insufficient pressure of the second fluid chamber b generation to push poppet valve core 5 open, but overcome the application force of the interior overflow ball 16.3 back overflow springs 16.2 of overflow assembly 16, so overflow ball 16.3 leaves valve body sealing surface, overflow assembly 16 is opened, hydraulic oil is back to oil cabinet 12 through the first fluid chamber a, reach system protection object, the large I of protection domain is set and is regulated by the micrometer adjusting screw 16.1 in overflow assembly 16.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be limited to these embodiment shown in this article, but will accord with principle disclosed herein and features of novelty the widest consistent scope.
Claims (10)
1. a manual forklift hydraulic safe system, comprise Manpowered pump (1), oil cabinet (12), ejection assembly (11), also comprise preventing unexpected generation and pressure compensation speed governing assembly (8) that moment falls, possessing latch functions and regulator solution flow path direction changes the manual reverse of direction assembly (4) of system health and prevents the overflow assembly (16) overloading; Described pressure compensation speed governing assembly (8) is communicated with ejection assembly (11) and manual reverse of direction assembly (4) respectively; Described Manpowered pump (1) is communicated with manual reverse of direction assembly (4) and overflow assembly (16) respectively, and overflow assembly (16) is communicated with manual reverse of direction assembly (4).
2. manual forklift hydraulic safe system according to claim 1, it is characterized in that: described pressure compensation speed governing assembly (8) comprises throttle valve body (7), throttling valve core (10), spring (9), throttling valve core (10) is cup-shaped, throttling valve core (10) right-hand member is provided with a flow regulating valve axially extending bore (10.1), it is upper that throttling valve core (10) is enclosed within spring (9), and throttling valve core (10) and spring (9) are engaged in throttle valve body (7) and can do reciprocating; The flow regulating valve axially extending bore (10.1) of throttling valve core (10) right-hand member is communicated with ejection assembly (11); Throttle valve body (7) wall is provided with the cutoff port (d) intersecting with throttling valve core (10) sense of motion, and cutoff port (d) is communicated with manual reverse of direction assembly (4).
3. manual forklift hydraulic safe system according to claim 2, it is characterized in that: described throttle valve body (7) left end forms the 4th fluid chamber (e), described throttle valve body (7) right-hand member forms the 5th fluid chamber (f).
4. manual forklift hydraulic safe system according to claim 1, it is characterized in that: described manual reverse of direction assembly (4), comprise successively from left to right left valve barrel (6), cone valve spring (3), poppet valve core (5), middle valve body (2), steel ball (17), right valve barrel (15), valve rod spring (13), valve rod (14) composition, be same axis arranged, cone valve spring (3), one group of check valve of poppet valve core (5) and left valve barrel (6) composition, middle valve body (2), steel ball (17) forms another group check valve, right valve barrel (15), valve rod spring (13), valve rod (14) composition control mechanism, the cone small end of poppet valve core (5) and steel ball (17) are all arranged in valve body (2), poppet valve core (5) and steel ball (17) are for controlling the unlatching at valve body (2) two ends, left and right or closing, valve rod (14) is for promoting steel ball (17) motion, fluid cavity is communicated with Manpowered pump (1).
5. manual forklift hydraulic safe system according to claim 4, is characterized in that: between described steel ball (17) and valve rod (14), be provided with stroke gap.
6. manual forklift hydraulic safe system according to claim 1, is characterized in that: described overflow assembly (16) is the straight ejector half by pass valve of ball formula.
7. manual forklift hydraulic safe system according to claim 6, it is characterized in that: the valve body front portion of described by pass valve is overflow ball (16.3), middle part is overflow spring (16.2), and afterbody is provided with the micrometer adjusting screw (16.1) that regulates pressure.
8. manual forklift hydraulic safe system according to claim 7, is characterized in that: described Manpowered pump (1) is single pole or the reciprocating single acting pump of two bar.
9. according to the manual forklift hydraulic safe system described in claim 6,7,8 any one, it is characterized in that: described Manpowered pump (1) application of force form is that hand is pulled, foot-operated two-in-one mechanism, or independent hand trigger structure, or independent footstep mechanism.
10. manual forklift hydraulic safe system according to claim 1, is characterized in that: described ejection assembly (11) is oil cylinder, and described cylinder structure is plunger tpe or piston type.
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| CN201410108004.1A CN103848374B (en) | 2014-03-19 | 2014-03-19 | Manual forklift hydraulic safe system |
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| CN201410108004.1A CN103848374B (en) | 2014-03-19 | 2014-03-19 | Manual forklift hydraulic safe system |
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| CN103848374B CN103848374B (en) | 2016-08-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105819374A (en) * | 2016-06-03 | 2016-08-03 | 宁海佰成机械有限公司 | Hydraulic device of tray carriage |
| CN108679028A (en) * | 2018-08-15 | 2018-10-19 | 罗弦 | A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application |
| CN109259704A (en) * | 2018-10-19 | 2019-01-25 | 珠海格力电器股份有限公司 | Dish-washing machine consumptive material delivery device and dish-washing machine |
| CN111547648A (en) * | 2020-04-24 | 2020-08-18 | 安徽合力股份有限公司 | Stacker load holding hydraulic system |
| CN112875456A (en) * | 2021-01-26 | 2021-06-01 | 重庆大学 | Self-adaptive buffer hydraulic speed-limiting cutting device, system and method |
| CN114030595A (en) * | 2021-11-18 | 2022-02-11 | 庆安集团有限公司 | Time-controllable differential motion actuating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105819374A (en) * | 2016-06-03 | 2016-08-03 | 宁海佰成机械有限公司 | Hydraulic device of tray carriage |
| CN108679028A (en) * | 2018-08-15 | 2018-10-19 | 罗弦 | A kind of hydraulic power unit valve block structure and hydraulic power unit and the fork truck of application |
| CN109259704A (en) * | 2018-10-19 | 2019-01-25 | 珠海格力电器股份有限公司 | Dish-washing machine consumptive material delivery device and dish-washing machine |
| CN111547648A (en) * | 2020-04-24 | 2020-08-18 | 安徽合力股份有限公司 | Stacker load holding hydraulic system |
| CN111547648B (en) * | 2020-04-24 | 2024-05-03 | 安徽合力股份有限公司 | Hydraulic system for load maintenance of stacker |
| CN112875456A (en) * | 2021-01-26 | 2021-06-01 | 重庆大学 | Self-adaptive buffer hydraulic speed-limiting cutting device, system and method |
| CN114030595A (en) * | 2021-11-18 | 2022-02-11 | 庆安集团有限公司 | Time-controllable differential motion actuating device |
| CN114030595B (en) * | 2021-11-18 | 2024-06-18 | 庆安集团有限公司 | Time-controllable differential actuating device |
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