Horizontal supporting leg multi-stage detection device and overhead working truck

Abstract

The multi-stage detection device comprises a plurality of horizontal supporting legs used for supporting the overhead working truck, and the outer portion of each horizontal supporting leg is correspondingly connected with a supporting leg box body in a sliding mode. The detection device comprises a plurality of detection strips and a detection proximity switch, the detection strips are uniformly distributed in the telescopic range of the horizontal supporting leg, the detection proximity switch is arranged on the supporting leg box body, and the detection proximity switch is connected to conduct electricity once every time the detection proximity switch passes through one detection strip; the detection device further comprises an extension detection switch, a retraction detection switch and a controller; the extension detection switch and the retraction detection switch are electrically connected with the controller and are used for starting the controller; when the controller is started, the number of times of connection and conduction of the detection proximity switch can be recorded; according to the utility model, the level of the corresponding telescopic state of the horizontal supporting leg is calculated by means of the number of times of conduction connection, so that the effects of improving the detection accuracy of the horizontal supporting leg and simplifying the system complexity are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerial work vehicles, in particular to a multi-stage detection device for horizontal outriggers and an aerial work vehicle. Background Art

[0002] As a typical aerial work device, the safety and stability of aerial work vehicles are the most basic requirements. However, with the development of technology, the working height of aerial work vehicles is getting higher and higher, and the working range is getting larger and larger; therefore, in order to improve the working stability of the whole equipment, the horizontal leg span is also getting wider and wider.

[0003] In the traditional control mode, most of them only set a travel switch or proximity switch to detect the full extension state of the horizontal leg. Only when the horizontal leg is in the full extension state, the upper arm is allowed to move within the set maximum operating parameter range. Otherwise, the upper arm will be prohibited from moving, or it will be limited to a very small operating range. However, this control mode is very limited in actual operation, especially in narrow road conditions.

[0004] To this end, the existing horizontal leg detection technology is achieved by setting detection strips or detection holes on the horizontal movable legs and setting detection switches on the horizontal leg fixed square box. If graded detection is to be achieved, each leg needs to add a corresponding number of detection strips and detection switches; for example: the aerial work vehicle horizontal leg graded control device with patent publication number CN203920707U, which configures 4 pairs of detection devices for each leg to respectively detect the level of the extension range of the leg; however, if it is necessary to increase the level of detection detail, it is necessary to increase the number of detection devices; for example, if the extension range needs to be divided into 16 levels, then the horizontal leg needs to be configured with 16 detection switches, which greatly increases the design cost and assembly difficulty; at the same time, for vehicles with small vertical dimensions of the horizontal legs, there is not enough space to stagger the arrangement spacing of the detection strips, so only a limited number of graded detections can be achieved. Summary of the invention

[0005] In view of the above technical problems, the utility model provides a multi-level detection device for horizontal legs and an aerial work vehicle. A detection proximity switch is arranged on the leg box, and detection strips are evenly arranged on the leg. The detection strips can make the detection proximity switch passing through connected and conductive. The controller monitors the number of times the detection proximity switch is connected and conductive, and calculates the level of the corresponding extension and retraction state of the horizontal leg based on the number of times. In this way, the extension and retraction range of the horizontal leg can be accurately judged while simplifying the structure of the device, thereby improving the detection accuracy of the horizontal leg and simplifying the complexity of the system.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical means:

[0007] A multi-stage detection device for horizontal legs, comprising a plurality of horizontal legs for supporting an aerial work vehicle, wherein the outside of each horizontal leg is correspondingly and slidably connected with a leg box;

[0008] The detection device includes a plurality of detection bars evenly arranged within the telescopic range of the horizontal legs and a detection proximity switch arranged on the leg box, wherein the detection proximity switch is connected and conductive once each time it passes through a detection bar;

[0009] The detection device also includes an extension detection switch, a retraction detection switch and a controller; the extension detection switch and the retraction detection switch are both electrically connected to the controller and are used to turn on the controller; wherein, when the controller is turned on, the number of times the detection proximity switch is turned on and conductive is recorded.

[0010] The plurality of detection bars are evenly arranged within the telescopic range of the horizontal leg, and the first and last two detection bars are respectively located at positions where the detection proximity switch is connected and conductive when the horizontal leg is in a fully retracted state and a fully extended state.

[0011] The spacing between adjacent detection bars is greater than the on-off distance of the detection proximity switch.

[0012] The controller adopts a signal processor with a power-off data preservation function to avoid data loss due to power off.

[0013] The controller comprises:

[0014] A first data input port, which is electrically connected to the detection proximity switch;

[0015] a second data input port, which is electrically connected to the extension detection switch;

[0016] A third data input port is electrically connected to the retraction detection switch.

[0017] An aerial work vehicle, comprising the above-mentioned horizontal outrigger multi-stage detection device, is characterized in that:

[0018] It includes an upper control unit, which is electrically connected to the controller and is used to receive the level of the horizontal leg extension amplitude sent by the controller, and control the expansion amplitude of the boom on the aerial work vehicle according to the level of the horizontal leg extension amplitude.

[0019] Beneficial effects:

[0020] The utility model arranges a detection proximity switch on the support leg box, and evenly arranges detection strips on the support leg that can make the detection proximity switch connected and conductive, monitors the number of times the detection proximity switch is connected and conductive by means of a controller, and calculates the level of the corresponding extension and retraction state of the horizontal support leg according to the number of times the detection proximity switch is connected and conductive; thereby, the utility model can accurately judge the extension and retraction range of the horizontal support leg on the premise of simplifying the device structure, thereby improving the detection accuracy of the horizontal support leg and simplifying the complexity of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the multi-stage detection device for horizontal legs of the utility model;

[0022] Figure 2 It is a schematic diagram of the installation of the extension detection switch and the retraction detection switch of the multi-stage detection device of the horizontal leg of the utility model on the valve frame;

[0023] Figure 3 This is the electrical schematic diagram of the multi-stage detection device for horizontal legs of the utility model.

[0024] In the figure: 1. outrigger box; 2. detection proximity switch; 3. detection bar; 4. horizontal outrigger; 5. extension detection switch; 6. retraction detection switch; 7. controller. DETAILED DESCRIPTION

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] The schematic diagram of a multi-stage detection device for horizontal legs of the utility model is shown in FIG. Figure 1-3 As shown, it is assumed that the horizontal legs are divided into 10 levels for specific description. The multi-level detection device includes a plurality of horizontal legs for supporting the aerial work vehicle, wherein each of the horizontal legs is slidably connected to a leg box on the outside;

[0027] The detection device also includes a plurality of detection bars evenly arranged within the extension and retraction range of the horizontal leg and a detection proximity switch arranged on the leg box, and the detection proximity switch is connected and conductive once each time it passes through a detection bar. The detection device also includes an extension detection switch, a retraction detection switch and a controller; the extension detection switch and the retraction detection switch are both electrically connected to the controller and are used to turn on the controller; wherein, when the controller is turned on, the number of times the detection proximity switch is connected and conductive is recorded.

[0028] In order to ensure that the complete extension and retraction state of the horizontal leg can be detected, the detection proximity switch is set at a fixed position on the leg box, which should be able to detect the full retraction and full extension state of the horizontal leg. Specifically, a plurality of the detection bars are evenly arranged within the extension and retraction range of the horizontal leg, and the first and last two detection bars are respectively located at the positions where the detection proximity switch is connected and conductive when the horizontal leg is in the full retraction state and the full extension state.

[0029] In order to ensure the detection accuracy of the detection proximity switch, the spacing between adjacent detection bars should be greater than the on-off distance of the detection proximity switch.

[0030] In order to avoid data loss due to power failure, the controller adopts a signal processor with a power failure data preservation function.

[0031] The specific connection method of the controller is:

[0032] A first data input port, referred to as DI1, which is electrically connected to the detection proximity switch;

[0033] A second data input port, referred to as DI2, which is electrically connected to the extension detection switch;

[0034] The third data input port, referred to as DI3, is electrically connected to the retraction detection switch.

[0035] The multi-level detection device of the horizontal outrigger designed by the utility model can be applied to many aerial work vehicles; wherein the aerial work includes an upper control unit; specifically, the upper control unit is electrically connected to the controller, and is used to receive the level of the extension amplitude of the horizontal outrigger sent by the controller, and control the expansion amplitude of the boom on the aerial work vehicle according to the level of the extension amplitude of the horizontal outrigger. In this way, the utility model can accurately determine the expansion amplitude of the boom according to the extension amplitude of the horizontal outrigger, thereby improving the working flexibility of the aerial work vehicle.

[0036] The working process of this application is as follows, wherein the method for calculating the extension range of the utility model is as follows: Figure 3 As shown:

[0037] When operating the horizontal outriggers to extend:

[0038] S1: The horizontal legs extend outward, the extension detection switch is conductively connected, and the controller starts to start; that is, at this time, the second data input port of the controller - DI2 is in the conducting state;

[0039] S2: The detection proximity switch is driven by the horizontal leg and moves outward along the horizontal leg;

[0040] S3: Every time the proximity switch passes through a detection bar, it is connected and conductive once, and a signal is sent to the controller once, specifically, the proximity switch signal is detected from off to on; that is, every time the signal at the first data input port—DI1 port changes from 0 to 1, the controller increases the amplitude level of the leg extension once;

[0041] S4: The controller determines the extension level of the horizontal leg according to the number of signals received from the detection proximity switch; that is, the controller determines the extension level according to the data recorded by the DI1 port at this time.

[0042] When operating the horizontal outriggers to retract:

[0043] s1: The horizontal legs retract inwards, the retraction detection switch will be conductively connected, and then the controller starts to start; that is, at this time, the third data input port of the controller - DI3 is in the conductive state;

[0044] s2: The detection proximity switch is driven by the horizontal leg and moves inward along the horizontal leg;

[0045] s3: The detection proximity switch is connected and conductive once every time it passes a detection bar, and sends a signal to the controller once, specifically, the detection proximity switch signal changes from on to off; that is, every time the signal at the first data input port—DI1 port changes from 1 to 0, the controller reduces the amplitude level of the leg extension once;

[0046] s4: The controller determines the extension level of the horizontal leg according to the number of signals received from the detection proximity switch; that is, the controller determines the extension level according to the data recorded by the DI1 port at this time.

Claims

1. A multi-level detection device for horizontal legs, wherein a plurality of horizontal legs are used to support an aerial work vehicle, wherein a leg box is slidably connected to the outside of each horizontal leg; Features: The detection device comprises a plurality of detection bars evenly arranged within the telescopic range of the horizontal legs and a detection proximity switch arranged on the leg box, wherein the detection proximity switch is connected and conductive once each time it passes through a detection bar; The detection device also includes an extension detection switch, a retraction detection switch and a controller; the extension detection switch and the retraction detection switch are both electrically connected to the controller and are used to turn on the controller; wherein, when the controller is turned on, the number of times the detection proximity switch is turned on and conductive is recorded.

2. The multi-stage detection device for horizontal legs according to claim 1, characterized in that: The spacing between adjacent detection bars is greater than the on-off distance of the detection proximity switch.

3. The multi-stage detection device for horizontal legs according to claim 1, characterized in that: The plurality of detection bars are evenly arranged within the telescopic range of the horizontal leg, and the first and last two detection bars are respectively located at positions where the detection proximity switch is connected and conductive when the horizontal leg is in a fully retracted state and a fully extended state.

4. The multi-stage detection device for horizontal legs according to claim 1, characterized in that: The controller adopts a signal processor with a power-off data preservation function to avoid data loss due to power off.

5. The multi-stage detection device for horizontal legs according to claim 4, characterized in that: The controller comprises: A first data input port, which is electrically connected to the detection proximity switch; a second data input port electrically connected to the extension detection switch; A third data input port is electrically connected to the retraction detection switch.

6. An aerial work vehicle, comprising the horizontal outrigger multi-stage detection device according to any one of claims 1 to 5, characterized in that: It includes an upper control unit, which is electrically connected to the controller and is used to receive the level of the horizontal leg extension amplitude sent by the controller, and control the expansion amplitude of the boom on the aerial work vehicle according to the level of the horizontal leg extension amplitude.

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