Aerial work platform and electric transformation system and method thereof

Abstract

The invention relates to the technical field of oil-to-electricity, and provides an aerial work platform and an electric transformation system and method.The electric transformation system comprises a motor arranged on a rack and matched with a hydraulic pump of a hydraulic system in installation position so that the power output end of the motor can be connected to the hydraulic pump; the motor controller is connected with the motor, and the motor controller is used for controlling the motor to operate according to the motor control instruction; the main controller is connected to the first controller, the main controller is connected with the motor controller, and the main controller is used for generating a motor control instruction according to the function signal of the first controller; and the power battery is arranged on the rack, or the power battery is arranged on the chassis, and the power battery is connected with the motor controller so as to supply power to the operation of the motor. The method is low in transformation cost, short in transformation period, good in adaptability, high in stability and good in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of oil-to-electricity conversion, and in particular to an aerial work platform and an electrification conversion system and method thereof. Background Art

[0002] Traditional aerial work platforms are mainly powered by diesel engines, but their high fuel consumption leads to high operating costs. To address this issue, as well as to respond to environmental protection policies and trends, pure electric aerial work platforms have gradually appeared on the market. At present, the engines used in the aerial work platforms on the market are mostly National II, National III, or even earlier diesel engines, which are in urgent need of electrification transformation. However, most of the existing oil-to-electric solutions are for manufacturers to replace the original vehicle's control system as a whole (including all controllers, low-voltage lines, hydraulic systems, etc. of the original vehicle), and different vehicle models have different systems and control methods, and manufacturers will only transform their own products. Therefore, the above-mentioned overall replacement transformation method has disadvantages in terms of cost, transformation cycle, adaptability, stability, and safety. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides an aerial work platform and an electrification transformation system and method thereof, which have low transformation cost, short transformation period, good adaptability, high stability and good safety.

[0004] The technical solution adopted by the present invention is as follows: A system for electrifying an aerial work platform, the aerial work platform comprising a chassis, a drive device and a mechanical arm, the drive device being arranged on the chassis, the mechanical arm being connected to the drive device, the drive device comprising a housing and a frame located in the housing, the frame being provided with a hydraulic system, a control box and a low-voltage battery, the control box being provided with a first controller connected to a control bus of the aerial work platform, the electrifying system comprising: a motor, the motor being arranged on the frame, and the motor being adapted to the installation position of a hydraulic pump of the hydraulic system so that a power output end of the motor is connected to the hydraulic pump; a motor controller, the motor controller being connected to the motor, the motor controller being used to control the operation of the motor according to a motor control instruction; a main controller, the main controller being connected to the first controller, and the main controller being connected to the motor controller, the main controller being used to generate the motor control instruction according to a functional signal of the first controller; a power battery, the power battery being arranged on the frame, or the power battery being arranged on the chassis, the power battery being connected to the motor controller, to supply power for the operation of the motor.

[0005] Furthermore, the electrification transformation system of the aerial work platform also includes: a power module, which is connected to the power battery and connected to the low-voltage battery, and the power module is used to provide electrical energy from the power battery to the low-voltage battery.

[0006] Furthermore, the electrification transformation system of the aerial work platform also includes: a charger, which is arranged on the frame, connected to the power battery, and used to charge the power battery through an external power supply.

[0007] Furthermore, the motor controller and the main controller are both arranged on the frame.

[0008] Furthermore, the main controller obtains the corresponding rotation speed according to the function signal of the first controller, and sends the motor control instruction including the rotation speed to the motor controller.

[0009] Furthermore, the motor controller controls the operation of the motor according to the characteristics of the original engine of the aerial work platform by giving the rotational speed and the torque of the original engine running at the same rotational speed.

[0010] Furthermore, the electrification transformation system of the aerial work platform also includes: an alarm, which is connected to the main controller, and the main controller is also used to control the alarm to sound an alarm when the power level of the power battery is lower than a preset value.

[0011] Furthermore, the aerial work platform also includes a control room, which is provided with a control handle and a foot switch, the control handle and the foot switch are both connected to a second controller, and the second controller is connected to the control bus.

[0012] A method for electrification transformation of an aerial work platform comprises: replacing an engine component of the aerial work platform with the electrification transformation system.

[0013] An aerial work platform comprises an electrification transformation system of the aerial work platform.

[0014] Beneficial effects of the present invention: The electrification transformation system of the present invention, through the structure and function of its various devices, can achieve electrification control by only replacing the engine components of the original vehicle, while the control box and internal control program, hydraulic system, main low-voltage lines, etc. of the original vehicle do not need to be replaced or relocated. The transformation cost is low, the transformation cycle is short, the adaptability is good, the stability is high, and the safety is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the control system of the aerial work platform before the electrification transformation; Figure 2 It is a structural schematic diagram of the electrification transformation system of the aerial work platform according to an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a control system of a modified aerial work platform according to an embodiment of the present invention; FIG. 4 ( a ) is a specific electrical topology diagram of a part of the electrification transformation system of an aerial work platform according to an embodiment of the present invention; FIG4( b ) is a specific electrical topology diagram of another part of the electrification transformation system of the aerial work platform according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The aerial work platform of an embodiment of the present invention (refer to existing models, such as XCMG GTBZ18A1, etc.) includes a chassis, a drive device and a mechanical arm. The drive device is arranged on the chassis, and the mechanical arm is connected to the drive device. The drive device includes a casing and a frame located in the casing. A hydraulic system, a control box and a low-voltage battery are arranged on the frame. A first controller connected to a control bus of the aerial work platform is arranged in the control box.

[0018] In one embodiment of the present invention, the aerial work platform may further include a control room, which is provided with a control handle and a foot switch, the control handle and the foot switch are both connected to the second controller, and the second controller is connected to the control bus.

[0019] Generally, the drive device and the control room as a whole can constitute a turntable located on the chassis.

[0020] like Figure 1 As shown, before the electrification transformation, the control system of the aerial work platform includes, in addition to the above-mentioned first controller, hydraulic system, low-voltage battery, second controller, control handle and foot switch, an engine assembly, wherein the hydraulic system may include a hydraulic pump, a main valve and a motor, and the hydraulic pump may be a closed pump; the engine assembly may include an engine and an engine electronic control unit.

[0021] like Figure 2As shown, the electrification transformation system of the embodiment of the present invention includes a motor 10, a motor controller 20, a main controller 30 and a power battery 40. Among them, the motor 10 is arranged on the frame, and the motor 10 is adapted to the installation position of the hydraulic pump of the hydraulic system, so that the power output end of the motor 10 is connected to the hydraulic pump; the motor controller 20 is connected to the motor 10, and the motor controller 20 is used to control the operation of the motor 10 according to the motor control instruction; the main controller 30 is connected to the first controller, and the main controller 30 is connected to the motor controller 20, and the main controller 30 is used to generate the motor control instruction according to the functional signal of the first controller; the power battery 40 is arranged on the frame, or the power battery 40 is arranged on the chassis, and the power battery 40 is connected to the motor controller 20 to supply power for the operation of the motor 10.

[0022] In one embodiment of the present invention, the motor 10 may be an XYQD series AC variable frequency motor, and its rated power may be 33 kW.

[0023] In one embodiment of the present invention, the motor controller 20 and the main controller 30 may both be arranged on a frame, and may be integrated on a circuit board, or may be integrated in a box.

[0024] In one embodiment of the present invention, the main controller 30 can obtain the corresponding speed according to the function signal of the first controller, and send the motor control instruction containing the speed to the motor controller 20. For example, the speeds corresponding to the functions of the aerial work platform are as follows: high speed walking 2400rmp, low speed walking 1200rmp, lifting 1700rmp, descending 1200rmp, telescopic 1200rmp, and other functions 800rmp. The first controller generates corresponding function signals based on the operator's operation of the control handle, foot switch, etc., and sends them to the main controller 30. The main controller 30 stores the corresponding relationship between each function and the speed, so that the corresponding speed can be obtained according to the function signal of the first controller. When the motor controller 20 receives the motor control instruction containing the speed, it drives the motor 10 to run by executing the instruction.

[0025] Furthermore, the motor controller 20 of the embodiment of the present invention can control the operation of the motor 10 by giving a speed and a torque of the original engine running at the same speed according to the characteristics of the original engine of the aerial work platform. For example, the original engine has a torque of 134N·m at a speed of 2200rpm. When the motor controller 20 receives a motor control instruction with a speed of 2200rpm, it can give a speed of 2200rpm and a torque of 134N·m to control the motor 10.

[0026] Compared with the aerial work platform with only two gears and two speeds before the transformation, the aerial work platform transformed by the electrified transformation system of the embodiment of the present invention utilizes the characteristic that the motor can achieve various speeds, matches the corresponding speeds for different functions, avoids the energy waste and efficiency reduction caused by excessive speed, and is more energy-saving and efficient; and, by matching the speed and torque characteristics with the original vehicle engine, the output characteristics of the motor 10 are made close to the original vehicle engine, ensuring the fit between the electrified transformation system and the unreplaced parts of the original vehicle, thereby improving the reliability of the transformed aerial work platform.

[0027] In one embodiment of the present invention, the power battery 40 may be a lithium battery or a lead-acid battery. In a specific embodiment of the present invention, a 20 / 22 meter boom-type aerial work platform is matched with an 80V350-460Ah lithium battery, which is divided into two battery boxes and placed on both sides of the turntable; a 26 / 28 meter boom-type aerial work platform is matched with an 80V460-520Ah lithium battery, which is divided into two battery boxes and placed on both sides of the turntable; a 14 meter boom-type aerial work platform is matched with an 80V300-350Ah lithium battery, and single-box and double-box solutions are considered according to space, with a single box placed on the turntable and a double box placed on both sides of the chassis.

[0028] Furthermore, the electrification transformation system of the embodiment of the present invention may also include a power module, which is connected to the power battery 40 and the low-voltage battery, and is used to provide the power of the power battery 40 to the low-voltage battery. In a specific embodiment of the present invention, the power module may be a DC / DC module.

[0029] Furthermore, the electrification transformation system of the embodiment of the present invention may also include a charger, which is arranged on the frame and connected to the power battery 40 , and is used to charge the power battery 40 through an external power source.

[0030] Furthermore, the electrification transformation system of the embodiment of the present invention may also include an alarm, which is connected to the main controller 30. The main controller is also used to control the alarm to sound an alarm when the power of the power battery 40 is lower than a preset value. In a specific embodiment of the present invention, when the SOC (State of Charge) of the power battery 40 is lower than 20%, an alarm may be sounded to indicate low power. When the SOC of the power battery 40 is lower than 10%, the function of the aerial work platform may be limited to protect the power battery 40 and increase its service life.

[0031] That is to say, after the electrification transformation, the control system of the aerial work platform replaces the engine components of the original vehicle with the above-mentioned electrification transformation system. The structure of the control system of the transformed aerial work platform is as follows: Figure 3 shown.

[0032] In a specific embodiment of the present invention, the specific electrical topology of the electrification transformation system of the aerial work platform is shown in Figure 4 (a) and Figure 4 (b), and the 5 line endpoints on the right side of Figure 4 (a) are connected one by one with the 5 line endpoints on the left side of Figure 4 (b) from top to bottom. In the figure, U1 is the main controller, the first controller is connected to the left side of U1, U2 is the motor controller, M1 is the motor, U5 is the power battery, U4 is the power module, U7 is the charger, and U8 is the alarm. Other components in the figure are necessary or preferably set to achieve better results. Among them, the main controller U1 can use an ECU of model E6X-V; the motor controller U2 can use the FJ-D1 series controller of Fanji Technology; the first controller can use the Rexroth RC28-14 controller. The multiple input ports of the main controller U1 are connected to the output ports of the first controller one by one. The output ports of the first controller correspond to corresponding functional signals. The voltage value of the signal output by each output port of the first controller is 12V. When the main controller U1 detects that there is a 12V signal at a certain input port, it determines that the corresponding function is started, thereby realizing the recognition of the functional signal and the setting of the corresponding speed.

[0033] According to the electrification transformation system of the aerial work platform according to the embodiment of the present invention, through the structure and function of its various equipment, electrification control can be achieved by only replacing the engine components of the original vehicle, and the control box and internal control program, hydraulic system, main low-voltage lines, etc. of the original vehicle do not need to be replaced or relocated, and the transformation cost is low, the transformation cycle is short, the adaptability is good, the stability is high, and the safety is good.

[0034] Based on the electrification transformation system of the aerial work platform in the above-mentioned embodiment, the present invention further proposes an electrification transformation method of the aerial work platform.

[0035] The method for electrifying the aerial work platform of the embodiment of the present invention replaces the engine assembly of the aerial work platform with the electrifying system of any of the above embodiments. For more specific implementations, please refer to the above embodiments, which will not be described in detail here.

[0036] According to the method for electrification transformation of an aerial work platform in an embodiment of the present invention, through the structure and function of each device of the electrification transformation system, electrification control can be achieved by replacing only the engine components of the original vehicle, while the control box and internal control program, hydraulic system, main low-voltage lines, etc. of the original vehicle do not need to be replaced or repositioned, with low transformation cost, short transformation cycle, good adaptability, high stability and good safety.

[0037] Based on the electrification transformation system of the aerial work platform in the above-mentioned embodiment, the present invention further proposes an aerial work platform.

[0038] The aerial work platform of the embodiment of the present invention includes the electrification transformation system of the aerial work platform of any of the above embodiments of the present invention. The specific implementation method thereof can refer to the above embodiments and will not be described in detail here.

[0039] According to the aerial work platform of the embodiment of the present invention, through the structure and function of each device of the electrification transformation system, electric control can be achieved by replacing only the engine components of the original vehicle, and the control box and internal control program, hydraulic system, main low-voltage lines, etc. of the original vehicle do not need to be replaced or relocated, with low transformation cost, short transformation cycle, good adaptability, high stability and good safety.

[0040] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0044] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0045] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0046] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0047] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0048] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0049] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An electric transformation system for an aerial work platform, characterized in that: The aerial work platform comprises a chassis, a drive device and a mechanical arm, wherein the drive device is arranged on the chassis, the mechanical arm is connected to the drive device, the drive device comprises a housing and a frame located in the housing, a hydraulic system, a control box and a low-voltage battery are arranged on the frame, a first controller connected to a control bus of the aerial work platform is arranged in the control box, and the electrification transformation system comprises: A motor, the motor is arranged on the frame, and the motor is adapted to the installation position of the hydraulic pump of the hydraulic system so that the power output end of the motor is connected to the hydraulic pump; A motor controller, the motor controller is connected to the motor, and the motor controller is used to control the operation of the motor according to a motor control instruction; A main controller, the main controller is connected to the first controller, and the main controller is connected to the motor controller, and the main controller is used to generate the motor control instruction according to the function signal of the first controller; A power battery is arranged on the frame, or the power battery is arranged on the chassis, and the power battery is connected to the motor controller to provide power for the operation of the motor.

2. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: Also includes: A power module is connected to the power battery and the power module is connected to the low-voltage battery. The power module is used to provide electrical energy of the power battery to the low-voltage battery.

3. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: Also includes: A charger is arranged on the frame, the charger is connected to the power battery, and the charger is used to charge the power battery through an external power supply.

4. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: The motor controller and the main controller are both arranged on the frame.

5. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: The main controller obtains the corresponding rotation speed according to the function signal of the first controller, and sends the motor control instruction containing the rotation speed to the motor controller.

6. The electrification transformation system for aerial work platforms according to claim 5, characterized in that: The motor controller controls the operation of the motor according to the characteristics of the original engine of the aerial work platform by giving the rotational speed and the torque of the original engine running at the same rotational speed.

7. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: Also includes: An alarm is connected to the main controller, and the main controller is also used to control the alarm to sound an alarm when the power level of the power battery is lower than a preset value.

8. The electrification transformation system for aerial work platforms according to claim 1, characterized in that: The aerial work platform also includes a control room, which is provided with a control handle and a foot switch. The control handle and the foot switch are both connected to a second controller, and the second controller is connected to the control bus.

9. A method for electrification transformation of an aerial work platform, characterized in that: include: The engine assembly of the aerial work platform is replaced by the electrification transformation system described in any one of claims 1 to 8.

10. An aerial work platform, characterized in that: Comprising an electrification transformation system for an aerial work platform according to any one of claims 1-8.

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