CN113548612A

CN113548612A - Omnidirectional movement aerial working platform and lifting transfer system thereof

Info

Publication number: CN113548612A
Application number: CN202111006515.9A
Authority: CN
Inventors: 肖求辉; 邹立叶; 于传强; 马长林; 胡彩凤; 贺鸿达
Original assignee: Hengyang Heli Industrial Vehicle Co Ltd
Current assignee: Hengyang Heli Industrial Vehicle Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-10-26

Abstract

The invention discloses an omnidirectional mobile aerial work platform and a lifting transfer system thereof, wherein the lifting transfer system comprises a lifting driving part, a slide rail, a slide block matched with the slide rail and an auxiliary wheel connected to the bottom of the slide block, the top end of the lifting driving part is used for connecting a platform to be transferred, and the bottom end of the lifting driving part is connected with the slide block; the slide rail is used for being fixed in the platform that waits to shift. The lifting transfer system solves the problem that the aerial work platform is inconvenient to transfer or difficult to transfer due to faults.

Description

Omnidirectional movement aerial working platform and lifting transfer system thereof

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a lifting transfer system. The invention also relates to an omnidirectional mobile aerial work platform with the lifting transfer system.

Background

The Mecanum wheel trolley intelligently controls the rotating speed and the rotating direction of at least 2 pairs of Mecanum wheels through an electric control and servo motor to realize the omnibearing movement of the whole vehicle.

Compared with other types of omnidirectional steering vehicles, the omnidirectional steering vehicle has the advantages that the wheat wheels do not need to deflect left and right when steering, only the rotation speed and the rotation direction (clockwise rotation or anticlockwise rotation) of each wheat wheel need to be controlled, the occupied space is small, the linear driving precision is high when moving, the omnidirectional steering vehicle is particularly suitable for various narrow spaces to operate, the integrated Mecanum wheel driving module of the aerial work platform is favorable for realizing the omnidirectional movement of the aerial work platform in a limited space, and the omnidirectional steering vehicle has the following defects:

the Mecanum wheel trolley has high requirements on the ground flatness, weak over-threshold capability, low driving speed (generally the maximum speed is 2km/h) and low self-transfer speed. At present, the brake of a Mecanum wheel trolley generally adopts a structure of braking a power-off motor shaft and a special Mecanum wheel, once a driving fault occurs or the Mecanum wheel needs to be quickly transferred, the friction force of the Mecanum wheel is large, and the whole machine cannot be pulled and transferred. When the trolley breaks down or needs to be transferred quickly, hoisting or forking is generally adopted for realizing, but a large transfer space is needed when the crane and the forklift are transferred, and the high-altitude operation platform which usually works in a narrow space is difficult to realize.

Therefore, how to solve the problem of inconvenient transfer of the mecanum wheel type omnidirectional moving work platform becomes a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a lifting transfer system, which solves the problem that an aerial work platform is inconvenient to transfer or difficult to transfer due to faults. The invention also aims to provide an omnidirectional mobile aerial work platform applying the lifting transfer system.

In order to achieve the purpose, the invention provides a lifting transfer system, which comprises a lifting driving part, a slide rail, a slide block matched with the slide rail and an auxiliary wheel connected to the bottom of the slide block, wherein the top end of the lifting driving part is used for connecting a platform to be transferred, and the bottom end of the lifting driving part is connected with the slide block; the slide rail is used for being fixed in the platform that waits to shift.

Optionally, the lifting driving part is a hydraulic cylinder, and further includes a hydraulic control module for driving the hydraulic cylinder to extend and retract.

Optionally, the hydraulic control module comprises an oil tank, an oil pump, an oil outlet pipe, an oil return pipe, a first pipeline without rod cavities and a second pipeline with rod cavities, wherein the first pipeline is connected with all the hydraulic cylinders; the first pipeline and the second pipeline are provided with hydraulic control one-way valves which are matched with each other to form a hydraulic lock, and the electromagnetic directional valve is connected with the first pipeline, the second pipeline, the oil outlet pipe and the oil return pipe.

Optionally, the hydraulic control system further comprises a manual hydraulic pump and a manual reversing valve, wherein the manual hydraulic pump is connected with the first pipeline and the second pipeline through the manual reversing valve.

Optionally, the slide rails are arranged oppositely, a sliding chute is arranged on the inner side of the slide rail, the slide block comprises a bottom plate, side slide plates and a pair of middle fixing plates, the side slide plates are arranged on two sides of the bottom plate oppositely and matched with the sliding chute, the middle fixing plates are arranged on the inner sides of the side slide plates and the bottom plate in parallel, and the bottom end of the lifting driving part is fixed between the middle fixing plates.

Optionally, the oil outlet pipe is connected with a first overflow valve, and an oil outlet of the manual hydraulic pump is connected with a second overflow valve.

Optionally, the auxiliary wheels comprise directional wheels and universal wheels.

The invention also provides an omnidirectional mobile aerial work platform which comprises a mobile chassis, a lifting work platform and the lifting transfer system.

Optionally, a traction seat is arranged at the front end of the movable chassis, and the sliding rails are welded to two sides of the movable chassis.

Optionally, the moving chassis is provided with a servo motor, a reducer connected with the servo motor, and a mecanum wheel connected with the reducer.

Compared with the prior art, the lifting transfer system provided by the invention has the advantages that when the wheel part of the Mecanum wheel type omnidirectional moving operation platform is locked due to failure or needs to be transferred quickly, the lifting driving part is only needed to drive the sliding block to lift along the sliding rail, the auxiliary wheel at the bottom of the sliding block is driven to contact the ground, the lifting driving part is used for jacking, the Mecanum wheel is separated from the ground, then the omnidirectional moving high-altitude operation platform is pulled or pushed by the outside to be transferred, the conventional auxiliary wheel is used for assisting the transfer, the transfer resistance is reduced, and the transfer speed is increased.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic installation diagram of a lift transfer system according to an embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a schematic view of the slider of FIG. 2;

FIG. 4 is a schematic diagram of a hydraulic control module;

FIG. 5 is a schematic view of the operating state of the omni-directional mobile aerial work platform;

fig. 6 is a schematic diagram of a transition state of the omni-directional mobile aerial work platform.

Wherein:

1-moving a chassis, 2-a servo motor, 3-a speed reducer, 4-Mecanum wheels, 5-sliding rails, 6-sliding blocks, 7-upper pin shafts, 8-hydraulic cylinders, 9-lower pin shafts, 10-a hydraulic control module, 11-universal wheels, 12-directional wheels and 13-a traction seat;

61-bottom plate, 62-side sliding plate, 63-middle fixing plate;

101-oil tank, 102-oil pump, 103-first overflow valve, 104-oil outlet pipe, 105-oil return pipe, 106-electromagnetic directional valve, 107-first pipeline, 108-second pipeline, 109-hydraulic control one-way valve, 1010-manual directional valve, 1011-manual hydraulic pump and 1012-second overflow valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, fig. 1 is a schematic installation diagram of a lifting transfer system according to an embodiment of the present invention, fig. 2 is a side view of fig. 1, fig. 3 is a schematic diagram of a slider in fig. 2, fig. 4 is a schematic diagram of a hydraulic control module, fig. 5 is a schematic diagram of an operation state of an omnidirectional moving aerial work platform, and fig. 6 is a schematic diagram of a transfer state of the omnidirectional moving aerial work platform.

The lifting transfer system comprises a lifting driving part, a sliding rail 5, a sliding block 6 and auxiliary wheels, wherein the sliding rail 5 is vertically arranged on a platform to be transferred, the top end of the lifting driving part is arranged on the platform to be transferred, the bottom end of the lifting driving part is connected with the sliding block 6, the sliding block 6 is pushed to extend downwards by virtue of the lifting driving part, so that the auxiliary wheels fixed at the bottom of the sliding block 6 are in contact with the ground, the platform to be transferred is conveniently pulled, and the rapid transfer is realized by virtue of the auxiliary wheels.

The present invention provides a lift transfer system that is described in more detail below with reference to the figures and the embodiments.

In the specific embodiment provided in the present application, the lifting driving portion specifically employs a hydraulic cylinder 8. The slide rail 5, the slide block 6, the hydraulic cylinder 8 and the auxiliary wheel are arranged in a one-to-one correspondence manner. Referring to fig. 1-4 specifically, the slide rails 5 are provided with slide grooves, each set of slide rails 5 includes two slide rails 5 disposed opposite to each other by the slide grooves, and a plurality of sets (at least four sets) of slide rails 5 are welded on two sides of the platform to be transferred, i.e., the illustrated moving chassis 1, respectively. The sliding block 6 comprises a bottom plate 61 and side sliding plates 62 arranged on two sides of the bottom plate 61, the side sliding plates 62 are matched with sliding grooves of the sliding rail 5, a pair of middle fixing plates 63 which are oppositely arranged in parallel are arranged on the inner sides of the bottom plate 61 and the side sliding plates 62, the shapes of the middle fixing plates 63 are concave, the bottom plate 61 and the side sliding plates 62 are reinforced through the pair of middle fixing plates 63, and the connection strength and the connection reliability are improved. The bottom of the middle fixing plate 63 is provided with a pin hole, the bottom end of the hydraulic cylinder 8 extends into the space between the bottom ends of the pair of middle fixing plates 63 and is fixedly connected with the sliding block 6 by virtue of the lower pin shaft 9, and the top end of the hydraulic cylinder 8 is fixed on the platform to be transferred by virtue of the upper pin shaft 7. The bottom plate 61 is provided with a fixing hole so that the auxiliary wheel is mounted on the bottom plate 61.

All the hydraulic cylinders 8 are driven to synchronously move by the aid of the hydraulic control module 10, piston rods of the hydraulic cylinders 8 synchronously extend out, the auxiliary wheels support the platform to be transferred to be separated from the ground, so that the platform to be transferred is pulled or pushed to be transferred, and rapid transfer is achieved by the aid of the auxiliary wheels. The principle of the hydraulic control module 10 is as follows:

in one embodiment, the hydraulic control module 10 includes a tank 101, an oil pump 102, an oil outlet line 104, an oil return line 105, a solenoid directional valve 106, a first line 107, and a second line 108. The first pipeline 107 is used for parallelly collecting rodless cavities of all the hydraulic cylinders 8, the second pipeline 108 is used for parallelly collecting rod cavities of all the hydraulic cylinders 8, the first pipeline 107 and the second pipeline 108 are provided with hydraulic control one-way valves 109, and the hydraulic control one-way valves 109 of the first pipeline 107 and the second pipeline are matched with each other to form a hydraulic lock. An oil outlet of the oil pump 102 is connected with an oil outlet pipe 104, and the oil outlet pipe 104 and an oil return pipe 105 are communicated with a first pipeline 107 and a second pipeline 108 through an electromagnetic directional valve 106.

As shown in fig. 4, when the left side of the electromagnetic directional valve 106 is energized, the left side of the electromagnetic directional valve 106 communicates with the oil passage, so that the first pipe 107 communicates with the oil outlet pipe 104, and the second pipe 108 communicates with the oil return pipe 105. The high-pressure oil pressurized by the oil pump 102 flows to the pilot check valve 109 of the first pipeline 107 through the oil outlet pipe 104 and the electromagnetic directional valve 106, the pilot check valve 109 is opened, and the high-pressure oil flows to the rodless chambers of all the hydraulic cylinders 8 through all the first pipelines 107 synchronously. Meanwhile, the high-pressure oil in the first pipeline 107 acts on the pilot-operated check valve 109 of the second pipeline 108, the pilot-operated check valve 109 of the second pipeline 108 is switched to be in reverse conduction, and the low-pressure oil in the rod cavity of all the hydraulic cylinders 8 synchronously flows to the second pipeline 108 and flows back to the oil tank 101 through the second pipeline 108, the electromagnetic directional valve 106 and the oil return pipe 105, so that the piston rods of the hydraulic cylinders 8 extend out.

When the right side of the electromagnetic directional valve 106 is electrified, the right side of the electromagnetic directional valve 106 is communicated with the oil circuit in a reversing way, at the moment, the first pipeline 107 is communicated with the oil return pipe 105, and the second pipeline 108 is communicated with the oil outlet pipe 104. The high-pressure oil pressurized by the oil pump 102 flows to the pilot operated check valve 109 of the second pipeline 108 through the oil outlet pipe 104 and the electromagnetic directional valve 106, the pilot operated check valve 109 is turned on, and the high-pressure oil flows to the rod chambers of all the hydraulic cylinders 8 through the second pipeline 108 synchronously. Meanwhile, the high-pressure oil in the second pipeline 108 acts on the pilot-operated check valve 109 of the first pipeline 107, the pilot-operated check valve 109 of the first pipeline 107 is conducted reversely, the low-pressure oil in the rodless cavity synchronously flows to the first pipeline 107 and flows back to the oil tank 101 through the first pipeline 107, the electromagnetic directional valve 106 and the oil return pipe 105, and the retraction of the piston rod of the hydraulic cylinder 8 is realized.

When the electromagnetic directional valve 106 is powered off, the electromagnetic directional valve 106 is in a neutral position, the oil path of the oil pump 102 is disconnected from the first pipeline 107 and the second pipeline 108, the hydraulic control one-way valve 109 of the first pipeline 107 and the second pipeline 108 is triggered because of no high-pressure oil at the oil inlet end, the hydraulic control one-way valve 109 and the hydraulic control one-way valve form a hydraulic lock, the hydraulic control one-way valve 109 is in a reverse cut-off state, the pressure oil in the rod cavity and the pressure oil in the rodless cavity cannot flow out through the first pipeline 107 or the second pipeline 108, and the piston of the hydraulic cylinder 8 is in an extending holding state.

It should be noted that the above-mentioned opposite directions all refer to the case where the pressure oil flows out of the rodless chamber or the rod chamber of the hydraulic cylinder 8 along the first pipe 107 or the second pipe 108 and the pilot operated check valve 109. The one-way conduction of the pilot check valve 109 means that the pilot check valve 109 is in a state of flowing to the first pipe 107 (the rodless chamber of the hydraulic cylinder 8) or the second pipe 108 (the rod chamber of the hydraulic cylinder 8) when not subjected to the pilot oil pressure of the adjacent pipe of the hydraulic lock.

The hydraulic cylinder 8 is arranged with a piston rod downward, the electromagnetic directional valve 106 is respectively connected with the ascending button and the descending button, when the descending button is pressed, the left side of the electromagnetic directional valve 106 is electrified, the electromagnetic directional valve 106 is switched to a left side communication oil path, the piston rod descends, and the auxiliary wheel contacts the ground; when the up button is pressed, the right side of the electromagnetic directional valve 106 is energized, and the electromagnetic directional valve 106 is switched to the right side communication oil passage. When the up button and the down button are both in the non-pressed state, the electromagnetic directional valve 106 is de-energized and is in the neutral position.

In another preferred embodiment provided by the present invention, the hydraulic control module 10 further includes a manual oil supply circuit connected in parallel with the oil path of the oil pump 102 for supplying oil to the first pipeline 107 or the second pipeline 108, the manual oil supply circuit includes a manual hydraulic pump 1011 and a manual directional control valve 1010, and the first pipeline 107 and the second pipeline 108 are connected to the oil outlet of the manual hydraulic pump 1011 and the oil return pipe 105 via the manual directional control valve 1010. The manual directional valve 1010 also includes a left valve position, a right valve position, and a neutral position. When the manual directional valve 1010 is in the neutral position, the oil path of the manual hydraulic pump 1011 is disconnected from the first pipe 107 and the second pipe 108.

This application is through setting up manual hydraulic pump 1011 and manual switching-over valve 1010 to be in the trouble at solenoid directional valve 106 or oil pump 102, or when the system outage, for pneumatic cylinder 8 provides pressure oil, in order to avoid under special condition, oil pump 102 return circuit trouble, pneumatic cylinder 8 can't normally work and cause the accident. It should be noted that when the oil pump 102 circuit is in the working state, the manual direction valve 1010 is in the neutral position, and the state of the plurality of hydraulic cylinders 8 can be controlled only by pressing the up button or the down button. When the oil pump 102 is in fault or the system is powered off, the electromagnetic directional valve 106 is in the middle position, the manual directional valve 1010 is manually switched, and the handle switch of the manual hydraulic pump 1011 is repeatedly pressed, so that all the hydraulic cylinders 8 can be synchronously controlled to normally work.

On the basis of the above embodiments, the present application further specifically connects the first relief valve 103 to the oil outlet of the oil pump 102, that is, the oil outlet pipe 104, and performs overpressure protection on the oil outlet pipe 104 through the first relief valve 103, and the overflow port of the first relief valve 103 is connected to the oil tank 101, and when the oil outlet pipe 104 is overpressurized, the pressure at the outlet of the oil pump 102 is reduced by means of the overflow discharge part of the pressure oil of the first relief valve 103. Further, a second overflow valve 1012 may be disposed at an oil outlet of the manual hydraulic pump 1011, and the manual oil supply circuit may be protected from excess pressure by the second overflow valve 1012.

In the above embodiments, the auxiliary wheels of the lift transfer system provided by the present application specifically include at least one pair of directional wheels 12 and one pair of universal wheels 11, so that steering is achieved through the universal wheels 11, and rapid transfer is achieved by means of cooperation of the universal wheels 11 and the directional wheels 12.

The application also provides an omnidirectional mobile aerial work platform which comprises a mobile chassis 1, a lifting work platform arranged above the mobile chassis 1 and lifting transfer systems arranged on two sides of the mobile chassis 1 and described in the embodiments. The hydraulic control module 10 of the lifting transfer system can be arranged at the top of the movable chassis 1, so that the lifting operation of the lifting operation platform is not influenced; the slide rails 5 are welded on two sides of the movable chassis 1, and the top end of the hydraulic cylinder 8 is fixed on the movable chassis 1 through an upper pin shaft 7. Mecanum wheels 4 of the moving chassis 1 are driven and controlled by a reducer 3 and a servo motor 2 to realize omnidirectional movement.

When the mobile chassis 1 is locked due to power failure or the mobile chassis 1 needs to be quickly transferred, all the hydraulic cylinders 8 can be driven to extend through the hydraulic control module 10, the hydraulic cylinders 8 continue to lift after the auxiliary wheels contact the ground, the Mecanum wheels 4 are supported from the ground, resistance between the mobile chassis 1 and the ground is reduced, and therefore the Mecanum wheel type omnidirectional mobile aerial work platform can be conveniently and quickly transferred by dragging or pushing the mobile chassis 1. The transfer state and the normal operation state are shown in fig. 5 and 6, that is, the normal operation of the omnidirectional moving aerial work platform is not affected by the arrangement of the lifting transfer system, and the omnidirectional moving aerial work platform can be quickly transferred only by descending the auxiliary wheels when the transfer is needed. In order to facilitate traction, the traction seat 13 is arranged at the front end or even the rear end of the movable chassis 1. The arrangement of the lifting platform and the mobile chassis 1 can refer to the prior art, and the application is not particularly limited.

The omnidirectional moving aerial work platform and the lifting transfer system provided by the application are matched with the directional wheel 12 through the arrangement of the liftable universal wheel 11, and the transfer can be realized by means of the auxiliary wheel even in a narrow and uneven passageway; meanwhile, the arrangement of two hydraulic driving circuits, namely the oil pump 102 and the manual hydraulic pump 1011, can ensure that the auxiliary wheel can be lifted normally.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above provides a detailed description of the omnidirectional mobile operation platform and the lifting transfer system thereof. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A lifting transfer system is characterized by comprising a lifting driving part, a slide rail, a slide block matched with the slide rail and an auxiliary wheel connected to the bottom of the slide block, wherein the top end of the lifting driving part is used for connecting a platform to be transferred, and the bottom end of the lifting driving part is connected with the slide block; the slide rail is used for being fixed in the platform that waits to shift.

2. The lift transfer system of claim 1, wherein said lift drive is a hydraulic cylinder, further comprising a hydraulic control module that drives said hydraulic cylinder to telescopically retain.

3. The lift transfer system of claim 2, wherein said hydraulic control module comprises an oil tank, an oil pump, an oil outlet pipe, an oil return pipe, a first conduit connecting rodless chambers of all said hydraulic cylinders, a second conduit connecting rod chambers of all said hydraulic cylinders; the first pipeline and the second pipeline are provided with hydraulic control one-way valves which are matched with each other to form a hydraulic lock, and the electromagnetic directional valve is connected with the first pipeline, the second pipeline, the oil outlet pipe and the oil return pipe.

4. The lift transfer system of claim 3, further comprising a manual hydraulic pump and a manual directional valve, said manual hydraulic pump being connected to said first and second conduits via said manual directional valve.

5. The lifting and transferring system according to any one of claims 1-4, wherein the sliding rails are disposed oppositely, and sliding grooves are disposed on inner sides of the oppositely disposed sliding rails, the sliding block includes a bottom plate, side sliding plates disposed oppositely on two sides of the bottom plate and engaged with the sliding grooves, and a pair of middle fixing plates disposed in parallel on inner sides of the side sliding plates and the bottom plate, and a bottom end of the lifting driving part is fixed between the pair of middle fixing plates.

6. The lift transfer system of claim 4, wherein said outlet line is connected to a first overflow valve, and an outlet port of said manual hydraulic pump is connected to a second overflow valve.

7. The lift transfer system of claim 5, wherein said auxiliary wheels comprise directional wheels and universal wheels.

8. An omni-directional mobile aerial work platform comprising a mobile chassis, a lift work platform and a lift transfer system according to any one of claims 1 to 7.

9. The omnidirectional moving aerial work platform of claim 8, wherein a traction base is arranged at the front end of the moving chassis, and the sliding rails are welded on two sides of the moving chassis.

10. The omnidirectional mobile aerial work platform of claim 8, wherein the mobile chassis is provided with a servo motor, a speed reducer connected to the servo motor, and mecanum wheels connected to the speed reducer.