Material self-discharging and truck-mounted lifting appliance control parallel working hydraulic system

Abstract

The utility model discloses a material self-discharging and truck-mounted lifting appliance control parallel working hydraulic system, which comprises an energy storage unit, a power unit, a control unit and a driving unit, and a gear pump is arranged on a hydraulic oil tank and is connected with a self-discharging valve group through a single oil pipe. According to the material self-discharging and vehicle-mounted lifting appliance control parallel working hydraulic system, the energy storage unit, the power unit, the control unit and the driving unit are matched with one another, so that the self-discharging oil cylinder can be conveniently controlled by one oil pipe, and the parallel connection of the material self-discharging hydraulic system and the lifting appliance control hydraulic system can be realized; therefore, the hydraulic pipeline is simplified, the hydraulic oil remaining amount in the oil pipe is reduced, and then the power output cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to material self -discharging and truck-mounted lifting appliance control system technical field, concretely is a kind of material self -discharging and truck-mounted lifting appliance control parallel working hydraulic system. BACKGROUND

[0002] Airport engineering maintenance comprehensive operation system airport pavement maintenance vehicle is allocated air force station, for pavement minor repair and maintenance, the lifting appliance control and material self -discharging function of airport pavement maintenance vehicle are all powered by gear pump, the system needs to simultaneously satisfy the demand of lifting appliance control and material self -discharging action, current scheme is that material self -discharging hydraulic system and lifting appliance control hydraulic system are independent of each other, and truck compartment self -discharging hydraulic system and lifting appliance control hydraulic system are independent of each other, back to lead to relatively complex hydraulic pipeline, and material self -discharging hydraulic cylinder is controlled by two oil pipes, oil pipe needs to have margin, to further increase the power output cost, simultaneously, hydraulic oil tank reserves sufficient hydraulic oil for entire hydraulic system, ensure that gear pump can continuously obtain oil supply, satisfy the oil demand of material self -discharging and lifting appliance control and so on each execution element under different working conditions, when back oil pipeline carries out hydraulic oil backflow, it is easy to cause more bubbles of hydraulic oil in hydraulic oil tank due to the backflow impact force of hydraulic oil being too large, and bubble enters hydraulic system, can endanger hydraulic system element and accelerate hydraulic oil aging.

[0003] Therefore, a kind of material self -discharging and truck-mounted lifting appliance control parallel working hydraulic system is needed to solve the above problems. INVENTION CONTENTS

[0004] To realize the above object, the utility model provides the following technical scheme: a kind of material self -discharging and truck-mounted lifting appliance control parallel working hydraulic system, including energy storage unit, power unit, control unit and drive unit;

[0005] The energy storage unit includes hydraulic oil tank;

[0006] The power unit includes gear pump;

[0007] The control unit includes self -discharging valve group, seven continuous control valve and three-position four-way valve, the self -discharging valve group is composed of DT1 electromagnetic valve, DT2 electromagnetic valve and DT3 electromagnetic valve, the seven continuous control valve is composed of A1 operating handle, A2 operating handle, A3 operating handle, A4 operating handle, A5 operating handle, A6 operating handle, A7 operating handle;

[0008] The drive unit includes skip cylinder, luffing cylinder, hoisting motor, telescopic cylinder, slewing motor, right support leg cylinder and left support leg cylinder;

[0009] The gear pump is located on the hydraulic oil tank, and is connected with the self -discharging valve group by single oil pipe.

[0010] The hydraulic oil tank is provided with an oil return filter connected with an oil return pipe, and the oil return filter is provided with a speed reduction assembly for reducing the impact force of the returned oil.

[0011] The speed reduction assembly comprises a speed reduction pipe arranged in the hydraulic oil tank, one end of the speed reduction pipe is connected with the oil return filter, a plurality of strip-shaped holes are arranged in the side wall of the end of the speed reduction pipe away from the oil return filter, a float is connected in the speed reduction pipe through a support assembly, a connecting drainage pipe is fixedly connected to one end of the float close to the oil return filter, a speed reduction ring is slidably connected in the float, the end of the speed reduction ring away from the oil return filter is sealed, a plurality of speed reduction holes are arranged in the side wall of the speed reduction ring, and the float is provided with a buffer assembly for buffering the speed reduction ring.

[0012] The diameter of the float is slightly smaller than the inner diameter of the speed reduction pipe, and a plurality of flow guide pipes are fixedly connected to the side wall of the float, and the ends of the flow guide pipes away from each other are located at a distance of not more than mm from the inner wall of the speed reduction pipe.

[0013] The buffer assembly comprises a buffer pipe fixedly connected to the bottom wall of the float, a buffer plate slidably connected to the buffer pipe, a buffer rod fixedly connected to one side of the buffer plate close to the speed reduction ring, the end of the buffer rod away from the buffer plate is connected with the speed reduction ring, a spring is sleeved on the side wall of the buffer rod, the ends of the spring are connected with the speed reduction ring and the buffer pipe respectively, a plurality of buffer holes are arranged in the buffer plate, and the buffer pipe is filled with damping liquid.

[0014] The support assembly comprises a plurality of support plates fixedly connected to the side wall of the float, two adjacent support plates are rotatably connected with a support wheel, and each support wheel is slidably connected to the inner wall of the speed reduction pipe.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] The material self-unloading and truck-mounted lifting appliance control parallel working hydraulic system is convenient to control the self-unloading oil cylinder by adopting one oil pipe, realizes the parallel connection of the material self-unloading hydraulic system and the lifting appliance control hydraulic system, thereby simplifying the hydraulic pipeline, reducing the residual amount of hydraulic oil in the oil pipe, reducing the power output cost, reducing the impact force of the returned oil on the hydraulic oil in the hydraulic oil tank under the action of the speed reduction assembly, reducing the probability of the generation of air bubbles of the hydraulic oil in the hydraulic oil tank, prolonging the service life of the oil product, and reducing the influence of cavitation on the hydraulic system. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1The utility model discloses a material self -discharging and truck-mounted lifting appliance control parallel working hydraulic system schematic diagram.

[0018] Figure 2 The utility model discloses a hydraulic oil tank structure schematic diagram.

[0019] Figure 3 The utility model discloses a speed reduction assembly and hydraulic oil tank structure schematic diagram.

[0020] Figure 4 The utility model discloses a speed reduction assembly internal structure schematic diagram.

[0021] Figure 5 The utility model discloses a support assembly structure schematic diagram.

[0022] Figure 6 The utility model discloses a buffer assembly structure schematic diagram.

[0023] In the drawing: 1, hydraulic oil tank;2, gear pump;3, self -discharging valve group;301, DT1 electromagnetic valve;302, DT2 electromagnetic valve;303, DT3 electromagnetic valve;4, seven -connected control valve;401, A1 operating handle;402, A2 operating handle;403, A3 operating handle;404, A4 operating handle;405, A5 operating handle;406, A6 operating handle;407, A7 operating handle;5, three -position four -way valve;6, tipping bucket oil cylinder;7, amplitude changing oil cylinder;8, hoisting motor;9, telescopic oil cylinder;10, rotary motor;11, right support leg oil cylinder;12, left support leg oil cylinder;13, oil return filter;1401, speed reduction pipe;1402, float;1403, drainage pipe;1404, speed reduction ring;1405, speed reduction hole;1406, flow guide pipe;1407, strip hole;1501, buffer pipe;1502, buffer plate;1503, buffer rod;1504, spring;1505, buffer hole;1601, support plate;1602, support wheel. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0025] Embodiment 1

[0026] Please refer to Figures 1-6 , a kind of material self -discharging and truck-mounted lifting appliance control parallel working hydraulic system in the drawing, including energy storage unit, power unit, control unit and drive unit;

[0027] The energy storage unit comprises a hydraulic oil tank 1;

[0028] The power unit comprises a gear pump 2;

[0029] The control unit comprises a self-unloading valve group 3, a seven-connected control valve 4 and a three-position four-way valve 5, the self-unloading valve group 3 is composed of a DT1 electromagnetic valve 301, a DT2 electromagnetic valve 302 and a DT3 electromagnetic valve 303, the seven-connected control valve 4 is composed of an A1 operation handle 401, an A2 operation handle 402, an A3 operation handle 403, an A4 operation handle 404, an A5 operation handle 405, an A6 operation handle 406 and an A7 operation handle 407;

[0030] The driving unit comprises a tipping bucket oil cylinder 6, an amplitude-changing oil cylinder 7, a lifting motor 8, an extending and retracting oil cylinder 9, a slewing motor 10, a right supporting leg oil cylinder 11 and a left supporting leg oil cylinder 12;

[0031] The gear pump 2 is arranged on the hydraulic oil tank 1 and connected with the self-unloading valve group 3 through a single oil pipe;

[0032] It should be noted that: through the mutual cooperation of the energy storage unit, the power unit, the control unit and the driving unit, the self-unloading oil cylinder can be controlled by using a single oil pipe, that is, the parallel connection of the material self-unloading hydraulic system and the spreader control hydraulic system is realized, so that not only the hydraulic pipeline is simplified, but also the internal hydraulic oil excess of the oil pipe is reduced, thereby reducing the power output cost, and at the same time, under the action of the speed reduction assembly, the impact force of the return oil on the hydraulic oil in the hydraulic oil tank 1 is reduced, thereby reducing the probability of the generation of air bubbles in the hydraulic oil in the hydraulic oil tank 1, thereby prolonging the use time of the oil product and reducing the influence of cavitation on the hydraulic system.

[0033] Please refer to Figure 2 and Figure 3 , the hydraulic oil tank 1 in the figure is provided with a return oil filter 13, the return oil filter 13 is connected with a return oil pipe, and the return oil filter 13 is provided with a speed reduction assembly for reducing the impact force of the return oil;

[0034] It should be noted that: through the setting of the return oil filter 13, the return hydraulic oil is filtered.

[0035] Please refer to Figures 3-5The speed reduction assembly in the drawing includes a speed reduction pipe 1401 arranged in the hydraulic oil tank 1, one end of the speed reduction pipe 1401 is connected with the oil return filter 13, a plurality of strip-shaped holes 1407 are arranged in the side wall of the speed reduction pipe 1401 away from the oil return filter 13, a float 1402 is connected in the speed reduction pipe 1401 through a support assembly, the float 1402 is fixedly connected with a connecting drainage pipe 1403 at one end close to the oil return filter 13, a speed reduction ring 1404 is slidably connected in the float 1402, the speed reduction ring 1404 is arranged in a sealed manner at one end away from the oil return filter 13, a plurality of speed reduction holes 1405 are arranged in the side wall of the speed reduction ring 1404, and the float 1402 is provided with a buffering assembly for buffering the speed reduction ring 1404;

[0036] It should be noted that: through the arrangement of the speed reduction assembly, the impact force of the oil return on the hydraulic oil in the hydraulic oil tank 1 is reduced under the buffering action of the buffering assembly, thereby reducing the probability of the generation of air bubbles in the hydraulic oil in the hydraulic oil tank 1, prolonging the use time of the oil product, and reducing the influence of cavitation on the hydraulic system.

[0037] Please refer to Figure 4 The diameter of the float 1402 is slightly smaller than the inner diameter of the speed reduction pipe 1401, a plurality of flow guide pipes 1406 are fixedly connected to the side wall of the float 1402, and the ends of the flow guide pipes 1406 away from each other are located at a distance of not more than 2 mm from the inner wall of the speed reduction pipe 1401.

[0038] It should be noted that: by making the diameter of the float 1402 slightly smaller than the inner diameter of the speed reduction pipe 1401, the support assembly can be conveniently installed, and the arrangement of the flow guide pipes 1406 enables the buffered oil return to flow along the inner wall of the speed reduction pipe 1401 to the hydraulic oil tank 1.

[0039] Working principle: when the airport material self-unloading and the truck-mounted hoist are controlled, the gear pump 2 provides hydraulic power for the system, the DT1 electromagnetic valve 301, the DT2 electromagnetic valve 302 and the DT3 electromagnetic valve 303 of the self-unloading valve group 3 are not powered, the tipping cylinder 6 is not operated, and the operation handle A1-A7 of the seven-way control valve 4 is not operated, so that the truck-mounted hoist is not operated;

[0040] When the DT1 electromagnetic valve 301 and the DT2 electromagnetic valve 302 of the self-unloading valve group 3 are powered and the DT3 electromagnetic valve 303 is not powered, the tipping cylinder 6 starts to rise, pushing the material transportation platform to reach the self-unloading angle, when the DT1 electromagnetic valve 301 and the DT2 electromagnetic valve 302 of the self-unloading valve group 3 are not powered and the DT3 electromagnetic valve 303 is powered, the tipping cylinder 6 starts to descend, and the material transportation platform finally returns to the horizontal position;

[0041] When the A1 operating handle 401 of the seven-connected control valve 4 is communicated, the boom of the truck-mounted hoist is lifted up, when the A2 operating handle 402 of the seven-connected control valve 4 is communicated, the boom of the truck-mounted hoist is lowered down, when the A3 operating handle 403 of the seven-connected control valve 4 is communicated, the lifting motor 8 starts to work, and the truck-mounted hoist is controlled to ascend or descend as a whole, when the A4 operating handle 404 of the seven-connected control valve 4 is communicated, the boom of the truck-mounted hoist is controlled to stretch or retract, when the A5 operating handle 405 of the seven-connected control valve 4 is communicated, the slewing motor 10 starts to work, and the truck-mounted hoist is controlled to rotate as a whole, when the A6 operating handle 406 of the seven-connected control valve 4 is communicated, the left outrigger oil cylinder 12 is controlled to stretch or retract, and the left outrigger is unfolded, when the A7 operating handle 407 of the seven-connected control valve 4 is communicated, the right outrigger oil cylinder 11 is controlled to stretch or retract, and the right outrigger is unfolded;

[0042] Therefore, under the mutual cooperation of the energy storage unit, the power unit, the control unit and the driving unit, the truck-mounted hoist is controlled by one oil pipe, the parallel connection of the material self-unloading hydraulic system and the hoist control hydraulic system is realized, the hydraulic pipeline is simplified, the residual amount of hydraulic oil in the oil pipe is reduced, and the power output cost is reduced.

[0043] When the hydraulic oil in each unit flows back to the hydraulic oil tank through the oil return pipe, the filtered hydraulic oil will flow into the speed reduction pipe 1401 under the guidance of the flow guide pipe 1403, and the float 1402 in the speed reduction pipe 1401 will float on the hydraulic oil under the buoyancy of the hydraulic oil in the hydraulic oil tank 1, so that the filtered hydraulic oil will flow into the speed reduction ring 1404 in the float 1402.

[0044] When the hydraulic oil flows into the speed reduction ring 1404, the impact force of the oil return is buffered under the buffering effect of the buffering assembly, so that the impact force of the oil return is reduced. When the buffered hydraulic oil accumulates in the speed reduction ring 1404, it will flow out from the speed reduction hole 1405 of the speed reduction ring 1404 and along the inner wall of the float 1402. The hydraulic oil flowing out of the speed reduction ring 1404 will finally flow out of the guide pipe 1406 and along the inner wall of the speed reduction pipe 1401 into the hydraulic oil tank 1, thereby reducing the impact force of the oil return on the hydraulic oil in the hydraulic oil tank 1, further reducing the probability of air bubbles in the hydraulic oil in the hydraulic oil tank 1, thereby prolonging the service life of the oil and reducing the influence of cavitation on the hydraulic system.

[0045] Example 2

[0046] Please refer to Figure 6The embodiment is further illustrated with reference to the embodiment 1. The buffer assembly in the drawing includes a buffer pipe 1501 fixedly connected to the bottom wall of the buoy 1402, a buffer plate 1502 slidably connected to the buffer pipe 1501, a buffer rod 1503 fixedly connected to one side of the buffer plate 1502 close to the speed reduction ring 1404, an end of the buffer rod 1503 away from the buffer plate 1502 connected to the speed reduction ring 1404, a spring 1504 sleeved on the side wall of the buffer rod 1503, both ends of the spring 1504 connected to the speed reduction ring 1404 and the buffer pipe 1501 respectively, and a plurality of buffer holes 1505 formed in the buffer plate 1502. The buffer pipe 1501 is filled with damping liquid, and the damping liquid flows through each buffer hole 1505 when being extruded.

[0047] It should be noted that, when the oil return flows from the speed reduction pipe 1401 to the speed reduction ring 1404, the speed reduction ring 1404 moves away from the oil return filter 13 under the impact force of the oil return, thereby pushing the buffer plate 1502 at one end of the buffer rod 1503 to slide in the buffer pipe 1501. When the buffer rod 1503 shrinks into the buffer pipe 1501, the spring 1504 is extruded, thereby deforming the spring 1504 under stress and forming an elastic force, so as to provide the speed reduction ring 1404 with a first layer of buffer effect.

[0048] When the buffer plate 1502 slides in the buffer pipe 1501, the damping liquid in the buffer pipe 1501 is extruded, so that the damping liquid flows through the buffer holes 1505 in the side wall of the buffer plate 1502, thereby forming a damping buffer mechanism, so as to provide the speed reduction ring 1404 with a second layer of buffer protection, thereby providing the speed reduction ring 1404 with double-layer buffer protection under the action of the two layers of buffer protection, so as to buffer the falling impact force of the oil return and reduce the falling impact force of the oil return.

[0049] Embodiment 3

[0050] Please refer to Figure 5 The embodiment is further illustrated with reference to other embodiments. The support assembly in the drawing includes a plurality of groups of support plates 1601 fixedly connected to the side wall of the buoy 1402, two support plates 1601 in each group being symmetrically arranged with respect to each other, and a support wheel 1602 rotatably connected between two adjacent support plates 1601, each support wheel 1602 being slidably connected to the inner wall of the speed reduction pipe 1401.

[0051] It should be noted that, by the arrangement of the support assembly, the sliding support of the plurality of support wheels 1602 provides support and limiting action for the sliding of the buoy 1402 on the inner wall of the speed reduction pipe 1401.

[0052] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A self-unloading and on-board-hoist control parallel working hydraulic system, characterized in that, It comprises an energy storage unit, a power unit, a control unit and a driving unit; The energy storage unit comprises a hydraulic oil tank (1); The power unit comprises a gear pump (2); The control unit comprises a self-discharging valve group (3), a seven-connected control valve (4) and a three-position four-way valve (5), the self-discharging valve group (3) is composed of DT1 electromagnetic valve (301), DT2 electromagnetic valve (302) and DT3 electromagnetic valve (303), the seven-connected control valve (4) is composed of A1 operating handle (401), A2 operating handle (402), A3 operating handle (403), A4 operating handle (404), A5 operating handle (405), A6 operating handle (406), A7 operating handle (407); The driving unit comprises a skip oil cylinder (6), an amplitude-changing oil cylinder (7), a lifting motor (8), a telescopic oil cylinder (9), a rotating motor (10), a right leg oil cylinder (11) and a left leg oil cylinder (12); The gear pump (2) is arranged on the hydraulic oil tank (1) and connected with the self-discharging valve group (3) through a single oil pipe.

2. The self-unloading and control-hoist parallel working hydraulic system according to claim 1, characterized in that: The hydraulic oil tank (1) is provided with an oil return filter (13) connected with an oil return pipe, and the oil return filter (13) is provided with a speed reduction assembly for reducing the impact force of the oil return.

3. The self-unloading and control-hoist parallel working hydraulic system according to claim 2, characterized in that: The speed reduction assembly comprises a speed reduction pipe (1401) arranged in the hydraulic oil tank (1), one end of the speed reduction pipe (1401) is connected with the oil return filter (13), a plurality of strip-shaped holes (1407) are formed in the side wall of the end of the speed reduction pipe (1401) away from the oil return filter (13), a float (1402) is connected in the speed reduction pipe (1401) through a support assembly, a connecting drainage pipe (1403) is fixedly connected to one end of the float (1402) close to the oil return filter (13), a speed reduction ring (1404) is slidably connected in the float (1402), the speed reduction ring (1404) is provided with a plurality of speed reduction holes (1405) in the side wall thereof, and the float (1402) is provided with a buffer assembly for buffering the speed reduction ring (1404).

4. The self-unloading and control-hoist parallel working hydraulic system according to claim 3, characterized in that: The diameter of the float (1402) is slightly smaller than the inner diameter of the speed reduction pipe (1401), and a plurality of guide pipes (1406) are fixedly connected to the side wall of the float (1402), and the ends of the guide pipes (1406) away from each other are not more than 2mm away from the inner wall of the speed reduction pipe (1401).

5. The self-unloading and control-hoist parallel working hydraulic system of claim 4, wherein: The buffer assembly comprises a buffer pipe (1501) fixedly connected to the bottom wall of the buoy (1402), the buffer pipe (1501) is slidably connected with a buffer plate (1502), the buffer plate (1502) is fixedly connected with a buffer rod (1503) on the side close to the speed reduction ring (1404), the buffer rod (1503) is connected with the speed reduction ring (1404) at the end away from the buffer plate (1502), the buffer rod (1503) is sleeved with a spring (1504) on the side wall, the two ends of the spring (1504) are connected with the speed reduction ring (1404) and the buffer pipe (1501) respectively, the buffer plate (1502) is provided with a plurality of buffer holes (1505), the buffer pipe (1501) is filled with damping liquid, and the damping liquid flows through each buffer hole (1505) when being extruded.

6. The self-unloading and control-hoist parallel working hydraulic system of claim 5, wherein: The support assembly comprises a plurality of groups of support plates (1601) which are symmetrically arranged in pairs, the support plates (1601) are fixedly connected to the side wall of the buoy (1402), adjacent two support plates (1601) are rotatably connected with a support wheel (1602), and each support wheel (1602) is slidably connected to the inner wall of the speed reduction pipe (1401).

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