CN201553589U

CN201553589U - Low-energy scissor-type hydraulic lifting machine with obliquely-mounted cylinder

Info

Publication number: CN201553589U
Application number: CN2009201800988U
Authority: CN
Inventors: 侯波; 张亚军; 王磊
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2009-10-23
Filing date: 2009-10-23
Publication date: 2010-08-18
Anticipated expiration: 2019-10-23

Abstract

The utility model relates to a low-energy scissor-type hydraulic lifting machine with an obliquely-mounted cylinder, aiming at increasing effective (vertical) thrust and improving energy utilization ratio and the efficiency of a hydraulic system and comprising a chassis, scissor arms, cross beams, a hydraulic cylinder, a connecting piece, a hydraulic system and a working platform; the scissor arms inside and outside the same layer are rotatably connected into a scissor at the center, the two ends of the scissor arms at different layers are respectively hinged, and the upper ends and the lower ends of the scissor arms are respectively connected with the working platform and the base in a rotating and sliding manner; the cylinder is obliquely arranged, the two ends of the cylinder are rotatably connected with a connecting piece which is fixedly arranged on the cross beams of the scissor arms of the adjacent inner side and forms an upward inclined angle with a horizontal coordinate axis, thus reducing the included angle between the cylinder and the longitudinal axis of a machine and increasing effective (vertical) thrust; the hydraulic system realizes loop by using volume-throttling to regulate the speed; and the potential energy released in the falling process of the working platform is recovered by an energy accumulator and can be reused. The low-energy scissor-type hydraulic lifting machine can lift a heavy object without changing the general structure of the machine by only need less thrust of the cylinder, and leads the energy to be fully utilized, thus reducing energy consumption.

Description

The low energy consumption fork hydraulic elevator that a kind of oil cylinder tilts to install

Technical field

The utility model relates to the low energy consumption fork hydraulic elevator that a kind of oil cylinder tilts to install, and can be used for the transportation and the aloft work of material, can be widely used in occasions such as storage, process of factory production, municipal works.

Background technology

The fork hydraulic elevator has oil cylinder to be arranged vertically and is in tilted layout two kinds of structural shapes, in prior art and product that oil cylinder is in tilted layout, bigger angle is arranged between the longitudinal axis of oil cylinder and machine, effective (vertically) thrust when hoisting is less,, energy is underutilized; Constructional feature and mode of operation by the fork hydraulic elevator determined again, when the bench board of elevator carries the weight rising, is that the machinery (hydraulic pressure) that the outside is imported can be transformed into potential energy, during decline, again it discharged.This part energy then can cause energy dissipation as not being used, prior art and product, and to the also not too much consideration of the recovery and reuse of this part energy, the efficient of hydraulic efficiency pressure system is also lower, and energy consumption is higher.

Summary of the invention

The technical problems to be solved in the utility model is: reduce the angle between driving oil cylinder and machine longitudinal axis, increase effective (vertically) component of cylinder thrust when hoisting, make the energy utilization more abundant; Reclaim the potential energy that the elevator bench board is discharged in the decline process, and be used again; Improve the efficient of hydraulic efficiency pressure system.

The beneficial effects of the utility model are: compared with prior art, increased effective (vertically) component of cylinder thrust when hoisting, made the energy utilization more abundant; The potential energy recovery and reuse have been realized; Improve the efficient of hydraulic efficiency pressure system, thereby reduced the energy that is consumed in the elevator working process.

The technical scheme that its technical matters that solves the utility model adopts is: connect oil cylinder and crossbeam with being installed in the oil cylinder attaching parts of cutting on the yoke crossbeam relevant inboard, to reduce the angle between oil cylinder and machine longitudinal axis, increase effectively (vertically) thrust; In hydraulic efficiency pressure system, be provided with energy storage potential energy and reclaim the loop, to realize the recovery and reuse of potential energy; With the kinematic velocity of volume-throttling speed control circuit control oil cylinder, to improve the efficient of hydraulic efficiency pressure system.

Increase oil cylinder effectively the measure of (vertically) thrust be: cutting in the inboard of being correlated with to have fixedly mounted on the crossbeam of yoke with axis of abscissa has certain positive pitch, has the oil cylinder attaching parts in two oil cylinder engaging lug seats and a crossbeam mount pad hole, the engaging lug piece at oil cylinder two ends is with its be rotationally connected (structural principle is seen Figure of description 3), angle between oil cylinder and machine longitudinal axis is reduced, effective (vertically) component of thrust increases, the thrust and the actual working pressure (a.w.p.) of the required output of oil cylinder reduce when overcoming same load, have improved capacity usage ratio.At this moment, the stroke and the installation length of oil cylinder slightly increase, and should take in during design.

Potential energy reclaims and utilizes process to be: when bench board rises for the first time, Hydraulic Pump 4 is through oil filter 2, check valve 3 oil suction from fuel tank 1, the cavity of resorption that the pressure oil liquid of being discharged enters oil cylinder 9 through the position, a left side and the shunting-combiner valve 8 of governor valve 5, check valve 6, two-position four way change valve 7, piston rod stretches out and promotes to cut yoke, and bench board is risen; After bench board arrives the desired location, close hydraulic pump motor, at this moment check valve 6 makes bench board stop in the desired location oil circuit sealing of oil cylinder cavity of resorption; Behind the end-of-job, two-position four way change valve is switched to right position, the bench board by gravity descends, make the piston rod withdrawal of oil cylinder, under the effect of deadweight, fluid in its cavity of resorption has produced certain pressure, right position through two-position four way change valve, check valve 12 and shutoff valve 11 enter energy storage 10, and the while arrives the oil inlet of Hydraulic Pumps through check valve 13, but this moment, the hydraulic pressure delivery side of pump was sealed by check valve 6 (terminal pressure is greater than the lower end on it), make it can not do the running of motor operating mode, the pressure oil liquid that oil cylinder is discharged can not enter fuel tank through check valve 3, can only enter in the energy storage, and mechanical energy is changed into the hydraulic pressure energy, and be stored in the energy storage, realized the recovery of potential energy; When bench board rises once more, two-position four-way valve 7 switches to position, a left side, energy storage has the pressure oil (its effect is equivalent to pressure oil tank) of certain pressure to the Hydraulic Pump supply through its position, left side and check valve 14, reduced the difference of pressure of Hydraulic Pump into and out of hydraulic fluid port, the energy that its drive motor is consumed reduces, and has realized reclaiming the utilization again of potential energy.

For improving the efficient of hydraulic efficiency pressure system, volume-the throttling speed control circuit that adopts variable vane pump and governor valve to form, the kinematic velocity of control oil cylinder makes the delivery rate of pump adapt with the actual needed flow of oil cylinder, operation pressure also by the actual loading decision, has been avoided excess flow loss.

Two-position four-way valve 7 is in order to the sense of motion of control oil cylinder in the system; Flow divider valve 8 is in order to improve the precision that is synchronized with the movement of two oil cylinders; The response pressure of check valve 14 is big (0.2-0.3MPa), makes back pressure valve usefulness, to guarantee having certain minimum operating pressure in the energy storage, satisfies need of work; Fluid deficiency in energy storage, in the time of can not making bench board arrive predetermined altitude, Hydraulic Pump can make bench board continue to rise (at this moment, because the effect of check valve 14 still can keep certain minimal pressure in the energy storage) through check valve 3 from the fuel tank oil suction; By pass valve 13 is made the safety valve of system and is used; During emergency situation, two-position four-way valve 7 can be switched to right position, two position two-way valve 15 switches to position, a left side, makes the fluid in the oil cylinder cavity of resorption directly enter fuel tank through the right position of flow divider valve 8, two-position four-way valve 7, and bench board is realized descending fast.

The main components of machine has the chassis, cuts yoke and bench board.Base adopts rectangular frame structure, the both sides, top have been welded hinge pin shaft stool and slide rail respectively, running wheel and steering hardware are installed in its underpart, and telescopic legs (in order to guarantee the working stability of machine) has been installed at two ends, and they have formed the chassis of machine jointly; The inboard cut yoke serve as reasons before and after the rectangular frame that is welded into of scissors rod and crossbeam, it is monomer that yoke is cut in the outside; The length of scissors rod requires to determine according to adjustable height, adopts the shaped steel of square-section, and cross-sectional sizes can be determined according to force analysis; Cut yoke with a layer medial and lateral and rotate to be connected at the middle part and cut fork, different layer two ends are hinged respectively; The upper and lower end that yoke is cut in both sides becomes to rotate with the chassis with workplatform respectively and is slidingly connected; Oil cylinder is rotationally connected with attaching parts, attaching parts is to be fixedly mounted on the crossbeam middle part that yoke is cut in the inboard, with becoming certain positive pitch between axis of abscissa, both reduced the oil cylinder axis with the angle between the machine longitudinal axis, make oil cylinder in lifting process, can change the position flexibly again; Bench board also adopts rectangular frame structure, the guardrail that has been welded at an upper portion thereof, and the both sides, bottom have been welded hinge pin shaft stool and slide rail respectively.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the hydraulic system principle figure of utility model, 1. fuel tanks among the figure; 2. oil filter; 3,6,12,14. check valves; 4. Hydraulic Pump; 5. governor valve; 7. two-position four way change valve; 8. shunting-combiner valve; 9. oil cylinder; 10. energy storage; 11. shutoff valve; 13. by pass valve; 15. two position two-way valve.

Fig. 2 is the overall construction drawing of utility model, 1. bases among the figure; 2. hydraulic power unit; 3. play oil cylinder; 4. yoke is cut in the outside; 5. upper cylinder; 6. bench board; 7. crossbeam; 8. yoke is cut in oil cylinder attaching parts 9. inboards; 10. energy storage 11 supporting legs.

Fig. 3 is the mounting structure enlarged drawing of oil cylinder and attaching parts, and yoke is cut in 4. outsides among the figure; 5. upper cylinder; 7. crossbeam; 8. yoke is cut in oil cylinder attaching parts 9. inboards.

The specific embodiment

Among the embodiment shown in Figure 2, earlier yoke 4 is cut in base 1, the outside, the inboard is cut framing members such as yoke 9 and bench board 6 and is assembled by designing requirement, again running wheel, steering hardware and telescopic outrigger 11 are installed in the base below, bottom being cut yoke is installed on the base again, order is installed all the other each layers and is cut yoke then, cut yoke with a layer medial and lateral and rotate to be connected at the center and cut fork, different layer two ends are hinged respectively, and bench board rotates respectively and sliding block joint with the two ends that yoke is cut by the superiors; The piston rod and the cylinder ends of following oil cylinder 3 and upper cylinder 5 are rotationally connected with the ears of attaching parts respectively, attaching parts 9 is fixedly mounted on upper and lower adjacent inboard and cuts on the crossbeam 8 of yoke, and the line (longitudinal axis) at its axis hole center, two ends can be determined according to designing requirement with the angle between the axis of abscissa; The turnover oil pipe of oil cylinder adopts high pressure rubber hose and is installed in the inside of rectangle hollow scissors rod; Fuel tank is bigger with the length and width size, and height small construction pattern is installed in the base below with it; Bladder accumulator 10 is vertically mounted on the base top; Hydraulic Pump is fixed on the frame, frame is fixed on the base again, and the drive motor of pump directly is fixed on the base; Hydraulic valve adopts board-like configuration, earlier each hydraulic valve is installed in the desired location on the port plate, with bolt port plate is fixed on the middle part of base upper surface again, with oil pipe Hydraulic Pump, port plate, energy storage, fuel tank and oil cylinder is connected according to the annexation shown in the hydraulic system principle figure then; Each Hydraulic Elements except that energy storage are all installed the middle part at base upper surface concentratedly, after installing and fixing, with a rectangular case they are covered, with protection and dustproof; The starting switch of Hydraulic Pump and the master cock of electromagnetic valve are installed in the edge of worktable upper surface, make the staff can control lifting and control position voluntarily.

Claims

1. the oil cylinder low energy consumption fork hydraulic elevator that tilts to install, mainly by the chassis, cut yoke, bench board and hydraulic efficiency pressure system and form, overall is multiple-structure, a layer medial and lateral are cut to be rotationally connected between yoke and are become to cut fork together, it is hinged respectively that yoke is cut in adjacent different layer medial and lateral, the same respectively bench board of upper and lower end, the base of cutting yoke rotate and sliding block joint, and it is characterized in that: oil cylinder is for being in tilted layout.

2. the low energy consumption fork hydraulic elevator that oil cylinder according to claim 1 tilts to install is characterized in that: oil cylinder drives crossbeam and cuts yoke by attaching parts; The oil cylinder attaching parts is fixedly mounted on the middle part that the yoke crossbeam is cut in relevant inboard, becomes an inclination angle that makes progress with axis of abscissa, and respectively there is an oil cylinder engaging lug axis hole both sides on it, and there is an axis hole that is used to install crossbeam at the middle part.