Power switching device of overhead working truck and overhead working truck

Abstract

The utility model discloses a power switching device of an overhead working truck and the overhead working truck, which are applied to the field of vehicle design. The system comprises a multi-gear key switch, a first relay, a second relay and a third relay, the multi-gear key switch is connected with the second-class chassis key, the first relay, the second relay and the third relay; the first relay is connected with the loading control system, the motor control system, the third relay and the second-class chassis battery; the second relay is connected with the DC module, the loading control system and the motor control system; and the third relay is connected with the DC module and the second-class chassis battery. According to the invention, rapid and independent switching of the two modes is realized through an interlocking function between the multi-gear key switch and the three relays, and the two modes share one set of motor control system, so that the economical efficiency and the cost performance are higher; the power switching device of the overhead working truck, provided by the invention, realizes a mode switching process, and is simple to operate on the whole.

Description

Technical Field

[0001] The utility model relates to the field of vehicle design, in particular to a power switching device for an aerial work vehicle and the aerial work vehicle. Background Art

[0002] In recent years, hybrid aerial work vehicles on the market have performed different work tasks through their own Class II chassis' electronic control system (low-voltage 12V battery, engine control system, low-voltage low-power generator) or additional three-electric system (high-voltage 48-72V battery, motor, motor controller). When performing aerial work under diesel-powered mode, since the operating voltage of the Class II chassis' electronic control system and the control system that controls aerial work are the same, in the current mode, the control system that controls aerial work is powered by the Class II chassis' electronic control system. When performing aerial work under electric mode, due to the current technology of the Class II chassis' electronic control system and the design and use standards of aerial work vehicles, the Class II chassis' electronic control system cannot meet the requirements of aerial work vehicles to perform work tasks in electric mode. Therefore, an additional three-electric system is needed to power the control system that controls aerial work so that it can perform work tasks.

[0003] However, due to the large voltage gap between the electronic control system of the second-class chassis itself and the additional three-electric system, both the electronic control system of the second-class chassis itself and the additional three-electric system can only perform work tasks in the corresponding mode, otherwise it will cause damage to the aerial work vehicle, and in severe cases, the engine may not be able to start. In this case, it is necessary to manually disconnect the additional three-electric system, the chassis electronic control system, and the control system for controlling aerial work through multiple manual switches or software control. However, the disconnection process needs to be operated according to a set of standard disconnection procedures. The overall operation process is cumbersome and requires high requirements on the operator. Once an incorrect operation occurs, it will cause damage to the aerial work vehicle and cause irreversible losses to the user.

[0004] In view of the above technology, seeking a power switching device for an aerial work vehicle is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] The utility model aims to provide a power switching device for an aerial work vehicle and an aerial work vehicle, which can solve the problems in the prior art of cumbersome operation and high requirements on operators when realizing power switching of the aerial work vehicle.

[0006] In order to solve the above technical problems, the utility model provides a power switching device for an aerial work vehicle, comprising: a multi-position key switch, a first relay, a second relay and a third relay;

[0007] The input end of the multi-position key switch is connected to the first output end of the second type chassis key, the first output end of the multi-position key switch is connected to the first normally closed terminal of the first relay, and the second output end of the multi-position key switch is connected to the first normally closed terminal of the second relay and the first normally closed terminal of the third relay;

[0008] The second normally closed terminal of the first relay is connected to the negative electrode of the body control system, the negative electrode of the motor control system and the switch terminal of the third relay, the first normally open terminal of the first relay is connected to the positive electrode of the second-class chassis battery, and the second normally open terminal of the first relay is connected to the positive electrode of the body control system and the positive electrode of the motor control system;

[0009] The second normally closed terminal of the second relay is connected to the negative pole of the DC module, the first normally open terminal of the second relay is connected to the positive pole of the DC module, and the second normally open terminal of the second relay is connected to the positive pole of the upper control system and the positive pole of the motor control system;

[0010] The second normally closed terminal of the third relay is connected to the negative pole of the DC module, the third normally closed terminal of the third relay is connected to the negative pole of the second-class chassis battery, and the first normally open terminal of the third relay is connected to the negative pole of the DC module.

[0011] Preferably, it further comprises a second-class chassis engine and a second-class chassis control system, wherein the second-class chassis engine, the second-class chassis control system, the second-class chassis battery and the second-class chassis key together constitute a second-class chassis electronic control system;

[0012] The control end of the second-category chassis engine is connected to the first control end of the second-category chassis control system;

[0013] The output terminal of the second-type chassis battery is connected to the input terminal of the second-type chassis key;

[0014] The second output terminal of the second type chassis key is connected to the input terminal of the second type chassis control system;

[0015] The second control end of the second type chassis control system is connected to the control end of the upper body control system.

[0016] Preferably, it also includes: an AC / DC charger, a high-voltage battery and a main power switch, wherein the AC / DC charger, the high-voltage battery, the main power switch and the DC module together constitute a three-electric system;

[0017] The output of the AC / DC charger is connected to the input of the high-voltage battery;

[0018] The output terminal of the high voltage battery is connected to the input terminal of the main power switch;

[0019] The first output end of the main power switch is connected to the input end of the DC module, the second output end of the main power switch is connected to the motor control system, and the third output end of the main power switch is connected to the motor driver.

[0020] Preferably, it also includes: a power take-off, a first oil pump and a turntable actuator;

[0021] The input end of the power take-off is connected to the output end of the second-class chassis engine, and the output end of the power take-off is connected to the input end of the first oil pump;

[0022] The output end of the first oil pump is connected to the control end of the rotary table actuator;

[0023] The input end of the rotary table actuator is connected to the output end of the upper body control system.

[0024] Preferably, it also includes: a second oil pump and a subframe actuator;

[0025] The input end of the second oil pump is connected to the output end of the motor control system, and the output end of the second oil pump is connected to the input end of the sub-frame actuator and the input end of the turntable actuator;

[0026] and the input end of the sub-frame actuator is connected to the output end of the first oil pump;

[0027] The input end of the subframe actuator is connected to the output end of the motor control system.

[0028] Preferably, it also includes: a negative electrode equipotential resistor;

[0029] The first end of the negative electrode equal potential resistor is connected to the second output end of the main power switch, and the second end of the negative electrode equal potential resistor is connected to the first normally open terminal of the second relay and the positive pole of the DC module.

[0030] Preferably, it also includes: a first fuse;

[0031] The first end of the first fuse is connected to the positive electrode of the second-category chassis battery, and the second end of the first fuse is connected to the first normally open terminal of the first relay.

[0032] Preferably, it also includes: a second fuse;

[0033] The first end of the second fuse is connected to the first output end of the second type chassis key, and the second end of the second fuse is connected to the input end of the multi-position key switch.

[0034] Preferably, it further comprises: a third fuse;

[0035] The first end of the third fuse is connected to the second control end of the second-class chassis control system, and the second end of the third fuse is connected to the control end of the body control system.

[0036] In order to solve the above technical problems, the present application also provides an aerial work vehicle, including the above-mentioned aerial work vehicle power switching device.

[0037] The utility model provides a power switching device for an aerial work vehicle, comprising: a multi-position key switch, a first relay, a second relay and a third relay; wherein the input end of the multi-position key switch is connected to the first output end of the second type chassis key, the first output end of the multi-position key switch is connected to the first normally closed terminal of the first relay, the second output end of the multi-position key switch is connected to the first normally closed terminal of the second relay and the first normally closed terminal of the third relay; the second normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay, the first normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay, and the first normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay. A normally open terminal is connected to the positive pole of the second-class chassis battery, and the second normally open terminal of the first relay is connected to the positive pole of the upper control system and the positive pole of the motor control system; the second normally closed terminal of the second relay is connected to the negative pole of the DC module, the first normally open terminal of the second relay is connected to the positive pole of the DC module, and the second normally open terminal of the second relay is connected to the positive pole of the upper control system and the positive pole of the motor control system; the second normally closed terminal of the third relay is connected to the negative pole of the DC module, the third normally closed terminal of the third relay is connected to the negative pole of the second-class chassis battery, and the first normally open terminal of the third relay is connected to the negative pole of the DC module. In this application, the fast and independent switching of the diesel-powered mode and the electric mode is realized through the interlocking function between a multi-position key switch and three relays, which better protects the two different control systems, and in this application, the diesel-powered mode and the electric mode share a motor control system, so that both working modes can fully exert their functions, and the economy and cost performance are higher; and the power switching device for aerial work vehicles provided in this application realizes the process of mode switching, which is simple to operate as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A circuit diagram of a power switching device for an aerial work vehicle provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of a complete aerial work vehicle power switching device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0042] The core of the utility model is to provide a power switching device for an aerial work vehicle and the aerial work vehicle.

[0043] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] Figure 1 A circuit diagram of a power switching device for an aerial work vehicle provided in an embodiment of the present application, as shown in the figure, includes: a multi-position key switch Key, a first relay K1, a second relay K2 and a third relay K3.

[0045] The input end of the multi-position key switch Key is connected to the first output end of the second-class chassis key, the first output end (03a) of the multi-position key switch Key is connected to the first normally closed terminal (85) of the first relay K1, and the second output end (03b) of the multi-position key switch Key is connected to the first normally closed terminal (85) of the second relay K2 and the first normally closed terminal (85) of the third relay K3;

[0046] The second normally closed terminal (86) of the first relay K1 is connected to the negative electrode of the body control system, the negative electrode of the motor control system and the switch terminal (30) of the third relay K3, the first normally open terminal (30) of the first relay K1 is connected to the positive electrode (BAT+) of the second-class chassis battery, and the second normally open terminal (87) of the first relay K1 is connected to the positive electrode of the body control system and the positive electrode of the motor control system (05);

[0047] The second normally closed terminal (86) of the second relay K2 is connected to the negative pole (DC12-) of the DC module, the first normally open terminal (30) of the second relay K2 is connected to the positive pole (25) of the DC module, and the second normally open terminal (87) of the second relay K2 is connected to the positive pole of the upper control system and the positive pole of the motor control system (05);

[0048] The second normally closed terminal (86) of the third relay K3 is connected to the negative electrode (DC12-) of the DC module, the third normally closed terminal (87a) of the third relay K3 is connected to the negative electrode (BAT-) of the second-type chassis battery, and the first normally open terminal (87) of the third relay K3 is connected to the negative electrode (DC12-) of the DC module.

[0049] In a specific embodiment, when the multi-position key switch Key rotates clockwise, that is, the cab key switch signal (the second-class chassis key) is the ON position signal, the signal is output from the first output terminal (03a) of the multi-position key switch Key, flows through the first normally closed terminal (85) of the first relay K1 and the second normally closed terminal (86) of the first relay K1, and the coil of the first relay K1 is energized, causing the normally open terminals (30 and 87) of the first relay to close, and the positive electrode of the second-class chassis battery is connected to the positive electrode of the upper control system and the positive electrode (05) of the motor control system. At this time, the power mode of the aerial work vehicle is the diesel-powered mode, and it works normally in the diesel-powered mode and executes relevant operation instructions.

[0050] When the multi-position key switch Key rotates counterclockwise, the signal is output from the second output terminal (03b) of the multi-position key switch Key, flows through the first normally closed terminal (85) of the second relay K2 and the second normally closed terminal (86) of the second relay K2, and flows through the first normally closed terminal (85) of the third relay K3 and the second normally closed terminal (86) of the third relay K3 at the same time. At this time, the coil of the second relay K2 is energized, and the coil of the third relay K3 is energized. The energization of the coil of the second relay K2 causes the normally open terminals (30 and 87) of the second relay K2 to close, and the energization of the third coil K3 causes the negative electrode of the upper control system and the negative electrode of the motor control system to be disconnected from the normally closed terminals (85, 86, 87) of the third relay K3, and the negative electrode (BAT-) of the second-class chassis battery is disconnected from the negative electrode of the upper control system and the negative electrode of the motor control system. When the normally closed terminal of the second relay K2 is closed, the positive pole (25) of the DC module is connected to the positive pole of the upper control system and the positive pole (05) of the motor control system. At this time, the power mode of the aerial work vehicle is the electric mode, and it works normally in the electric mode and executes relevant operation instructions.

[0051] It can be seen that when the multi-position key switch Key rotates clockwise, the first relay K1 is used to change the power mode of the aerial work vehicle at this time to the diesel-powered mode. When the multi-position key switch Key rotates counterclockwise, the first relay K1 is disconnected, and the second relay K2 and the third relay K3 are used to change the power mode of the aerial work vehicle at this time to the electric mode. The present application adopts the interlocking function between a switch and three relays as a whole to realize the switching of the two modes, which reduces the number of switches and operation procedures operated by humans. The operation is simple, and the misoperation protection device is realized. Even if the misoperation is performed, there will be no loss to the equipment. At the same time, the diesel-powered mode and the electric mode share a set of motor control systems, so that both working modes can fully exert their functions, and the economy and cost performance are higher. In addition, the hardware connection fully realizes the independent switching of the two modes, and even various misoperations (including when the engine is not turned off) will not cause any damage to the upper control system, the second-class chassis battery, etc.

[0052] The utility model provides a power switching device for an aerial work vehicle, comprising: a multi-position key switch, a first relay, a second relay and a third relay; wherein the input end of the multi-position key switch is connected to the first output end of the second type chassis key, the first output end of the multi-position key switch is connected to the first normally closed terminal of the first relay, the second output end of the multi-position key switch is connected to the first normally closed terminal of the second relay and the first normally closed terminal of the third relay; the second normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay, the first normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay, and the first normally closed terminal of the first relay is connected to the negative electrode of the upper control system, the negative electrode of the motor control system and the switch terminal of the third relay. A normally open terminal is connected to the positive pole of the second-class chassis battery, and the second normally open terminal of the first relay is connected to the positive pole of the upper control system and the positive pole of the motor control system; the second normally closed terminal of the second relay is connected to the negative pole of the DC module, the first normally open terminal of the second relay is connected to the positive pole of the DC module, and the second normally open terminal of the second relay is connected to the positive pole of the upper control system and the positive pole of the motor control system; the second normally closed terminal of the third relay is connected to the negative pole of the DC module, the third normally closed terminal of the third relay is connected to the negative pole of the second-class chassis battery, and the first normally open terminal of the third relay is connected to the negative pole of the DC module. In this application, the fast and independent switching of the diesel-powered mode and the electric mode is realized through the interlocking function between a multi-position key switch and three relays, which better protects the two different control systems, and in this application, the diesel-powered mode and the electric mode share a motor control system, so that both working modes can fully exert their functions, and the economy and cost performance are higher; and the power switching device for aerial work vehicles provided in this application realizes the process of mode switching, which is simple to operate as a whole.

[0053] Based on the above embodiment, as a preferred embodiment, the schematic diagram of the complete aerial work vehicle power switching device is as follows: Figure 2As shown, it includes: a multi-gear key switch Key, a first relay K1, a second relay K2, a third relay K3, a second-class chassis key 1, a body control system 2, a motor control system 3, a second-class chassis battery 4, a DC module 5, a second-class chassis engine 6, a second-class chassis control system 7, an AC / DC charger 8, a high-voltage battery 9, a main power switch 10, a power take-off 11, a first oil pump 12, a turntable actuator 13, a second oil pump 14, a subframe actuator 15, a negative electrode equal potential resistor 16, and a motor driver 17. Among them, the second-class chassis engine 6, the second-class chassis control system 7, the second-class chassis battery 4 and the second-class chassis key 1 together constitute the second-class chassis electronic control system; the AC / DC charger 8, the high-voltage battery 9, the main power switch 10 and the DC module 5 together constitute the three-electric system.

[0054] The specific connection relationship of its components is: the control end of the second-class chassis engine 6 is connected to the first control end of the second-class chassis control system 7; the output end of the second-class chassis battery 4 is connected to the input end of the second-class chassis key 1; the second output end of the second-class chassis key 1 is connected to the input end of the second-class chassis control system 7; the second control end of the second-class chassis control system 7 is connected to the control end of the upper control system 2.

[0055] The output end of the AC / DC charger 8 is connected to the input end of the high-voltage battery 9; the output end of the high-voltage battery 9 is connected to the input end of the main power switch 10; the first output end of the main power switch 10 is connected to the input end of the DC module 5, the second output end of the main power switch 10 is connected to the motor control system 3, and the third output end of the main power switch 10 is connected to the motor driver 17.

[0056] The input end of the power take-off 11 is connected to the output end of the second-class chassis engine 6, and the output end of the power take-off 11 is connected to the input end of the first oil pump 12; the output end of the first oil pump 12 is connected to the control end of the turntable actuator 13; the input end of the turntable actuator 13 is connected to the output end of the upper control system 2.

[0057] The input end of the second oil pump 14 is connected to the output end of the motor control system 3, and the output end of the second oil pump 14 is connected to the input end of the subframe actuator 15 and the input end of the turntable actuator 13; and the input end of the subframe actuator 15 is connected to the output end of the first oil pump 12; the input end of the subframe actuator 15 is connected to the output end of the motor control system 3.

[0058] A first end of the negative electrode equalizing resistor 16 is connected to the second output end of the main power switch 10 , and a second end of the negative electrode equalizing resistor 16 is connected to a first normally open terminal of the second relay K2 and the positive electrode of the DC module 5 .

[0059] Among them, as a preferred embodiment, the voltage of the second-class chassis battery 4 is 12V, the operating voltage of the upper control system 2 and the motor control system 3 is 12V, and the operating voltage of the DC module 5 is DC48V-72V-DC12V.

[0060] Among them, according to the above embodiments, it can be known that the present application realizes mode switching as a whole, and the process of performing operations under mode switching is: when the multi-speed key switch Key rotates clockwise, the first relay K1 changes the power mode of the aerial work vehicle at this time to the diesel-powered mode. At this time, the source of power is the second-class chassis electronic control system, and after the positive electrode of the second-class chassis battery is connected to the positive electrode of the upper control system and the positive electrode (05) of the motor control system, the power mode of the aerial work vehicle is the diesel-powered mode, and it works normally in the diesel-powered mode and executes relevant operation instructions, that is, controls the first oil pump 12 to start working, thereby prompting the turntable actuator 13 and the subframe actuator 15 to start working.

[0061] When the multi-position key switch Key rotates counterclockwise, the second relay K2 and the third relay K3 change the power mode of the aerial work vehicle to the electric mode. At this time, the open source of the power supply is the three-electric system. After the positive pole (25) of the DC module is connected to the positive pole of the upper control system and the positive pole (05) of the motor control system, the power mode of the aerial work vehicle is the electric mode, and it works normally in the electric mode and executes relevant operation instructions, that is, controls the second oil pump 14 to start working, thereby prompting the turntable actuator 13 and the subframe actuator 15 to start working.

[0062] It should be noted that the embodiment provided in the present application is only one possible implementation method, but is not limited to only this implementation method and can be set according to the needs of the user.

[0063] The present application provides a complete power switching device for aerial work vehicles. Under the device, the interlocking between the multi-position key switch, the first relay, the second relay and the third relay realizes the perfect operation of two batteries with different voltages (Class II chassis battery and high-voltage battery), realizes the switching of different modes, reduces the difficulty of operation, and realizes misoperation and self-protection.

[0064] Based on the above embodiments, as a preferred embodiment, Figure 1 As shown, it also includes a first fuse F1, a second fuse F2 and a third fuse F3;

[0065] Wherein, the first end of the first fuse F1 is connected to the positive electrode (BAT+) of the second-type chassis battery 4, and the second end of the first fuse F1 is connected to the first normally open terminal of the first relay K1;

[0066] A first end of the second fuse F2 is connected to a first output end of the second type chassis key 1, and a second end of the second fuse F2 is connected to an input end of the multi-position key switch Key;

[0067] A first end of the third fuse F3 is connected to a second control end of the second-type chassis control system 7 , and a second end of the third fuse F3 is connected to a control end of the bodywork control system 2 .

[0068] It should be noted that the embodiment of the present application is only a way to improve the safety of using the power switching device of the aerial work vehicle, but it is not limited to only this implementation method and can be set according to the needs of the user.

[0069] The utility model provides a power switching device for an aerial work vehicle, which realizes fast and independent switching between a diesel-powered mode and an electric mode through an interlocking function between a multi-position key switch and three relays, thereby better protecting two different control systems. In addition, the diesel-powered mode and the electric mode share a set of motor control systems in the present application, so that both working modes can fully exert their functions, with higher economy and cost-effectiveness. In addition, the power switching device for an aerial work vehicle provided by the present application realizes simple operation during mode switching, thereby reducing the difficulty of operation.

[0070] To solve the above technical problems, the present application also provides an aerial work vehicle, including the above aerial work vehicle power switching device, and having the same technical effects. The specific embodiments are the same as the above embodiments, and the present application will not repeat them here.

[0071] The above is a detailed introduction to a power switching device for an aerial work vehicle and an aerial work vehicle provided by the utility model. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0072] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A power switching device for an aerial work vehicle, characterized in that: include: A multi-position key switch, a first relay, a second relay and a third relay; wherein the input end of the multi-position key switch is connected to the first output end of the second type chassis key, the first output end of the multi-position key switch is connected to the first normally closed terminal of the first relay, and the second output end of the multi-position key switch is connected to the first normally closed terminal of the second relay and the first normally closed terminal of the third relay; The second normally closed terminal of the first relay is connected to the negative electrode of the body control system, the negative electrode of the motor control system and the switch terminal of the third relay, the first normally open terminal of the first relay is connected to the positive electrode of the second-class chassis battery, and the second normally open terminal of the first relay is connected to the positive electrode of the body control system and the positive electrode of the motor control system; The second normally closed terminal of the second relay is connected to the negative pole of the DC module, the first normally open terminal of the second relay is connected to the positive pole of the DC module, and the second normally open terminal of the second relay is connected to the positive pole of the upper control system and the positive pole of the motor control system; The second normally closed terminal of the third relay is connected to the negative pole of the DC module, the third normally closed terminal of the third relay is connected to the negative pole of the second type chassis battery, and the first normally open terminal of the third relay is connected to the negative pole of the DC module.

2. The power switching device for aerial work vehicles according to claim 1, characterized in that: It also includes a second-class chassis engine and a second-class chassis control system, wherein the second-class chassis engine, the second-class chassis control system, the second-class chassis battery and the second-class chassis key together constitute a second-class chassis electronic control system; The control end of the second type chassis engine is connected to the first control end of the second type chassis control system; The output end of the second type chassis battery is connected to the input end of the second type chassis key; The second output end of the second type chassis key is connected to the input end of the second type chassis control system; The second control end of the second type chassis control system is connected to the control end of the upper body control system.

3. The power switching device for aerial work vehicles according to claim 1, characterized in that: Also includes: An AC / DC charger, a high-voltage battery and a main power switch, wherein the AC / DC charger, the high-voltage battery, the main power switch and the DC module together constitute a three-electric system; The output end of the AC / DC charger is connected to the input end of the high voltage battery; The output end of the high-voltage battery is connected to the input end of the main power switch; The first output end of the main power switch is connected to the input end of the DC module, the second output end of the main power switch is connected to the motor control system, and the third output end of the main power switch is connected to the motor driver.

4. The power switching device for aerial work vehicles according to claim 2, characterized in that: Also includes: Power take-off, first oil pump and rotary table actuator; The input end of the power take-off is connected to the output end of the second-type chassis engine, and the output end of the power take-off is connected to the input end of the first oil pump; The output end of the first oil pump is connected to the control end of the turntable actuator; The input end of the turntable actuator is connected to the output end of the upper installation control system.

5. The power switching device for aerial work vehicles according to claim 4, characterized in that: Also includes: a second oil pump and a subframe actuator; The input end of the second oil pump is connected to the output end of the motor control system, and the output end of the second oil pump is connected to the input end of the sub-frame actuator and the input end of the turntable actuator; and the input end of the sub-frame actuator is connected to the output end of the first oil pump; The input end of the sub-frame actuator is connected to the output end of the motor control system.

6. The power switching device for aerial work vehicles according to claim 3, characterized in that: Also includes: Negative electrode equipotential resistance; The first end of the negative electrode equal potential resistor is connected to the second output end of the main power switch, and the second end of the negative electrode equal potential resistor is connected to the first normally open terminal of the second relay and the positive pole of the DC module.

7. The power switching device for aerial work vehicles according to any one of claims 1 to 6, characterized in that: Also includes: First fuse; The first end of the first fuse is connected to the positive electrode of the second-type chassis battery, and the second end of the first fuse is connected to the first normally open terminal of the first relay.

8. The power switching device for aerial work vehicles according to any one of claims 1 to 6, characterized in that: Also includes: Second fuse; The first end of the second fuse is connected to the first output end of the second type chassis key, and the second end of the second fuse is connected to the input end of the multi-position key switch.

9. The power switching device for aerial work vehicles according to claim 2, characterized in that: Also includes: The third fuse; The first end of the third fuse is connected to the second control end of the second-type chassis control system, and the second end of the third fuse is connected to the control end of the body control system.

10. An aerial work vehicle, characterized in that: The invention comprises the power switching device for an aerial work vehicle as described in any one of claims 1 to 9.

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