A mast type self-propelled aerial work vehicle power unit

Abstract

The utility model discloses a kind of power units for mast type self-walking aerial working truck, including alternating current permanent magnet motor, hydraulic gear pump, oil return filter in tank, oil suction filter, oil tank and function valve group;The alternating current permanent magnet motor, hydraulic gear pump, oil suction filter, oil tank are sequentially connected;The hydraulic gear pump is connected with function valve group;The oil tank is connected with oil return filter in tank.The utility model has the characteristics of small size, light weight, high power density and strong adaptability, can meet the demand under different working conditions, improve the flexibility and work efficiency of operation vehicle.

Description

Technical Field

[0001] This utility model relates to aerial work platforms, and more particularly to a power unit for a mast-type self-propelled aerial work platform. Background Technology

[0002] As the core component of aerial work platforms, the power unit's performance directly affects the platform's stability and work efficiency. Traditional aerial work platform power units are often bulky, occupying a significant amount of space and limiting their operation in confined or complex working environments. This is especially true for mast-type self-propelled aerial work platforms, where the unique mast structure places even higher demands on the power unit's size, weight, and power density.

[0003] Most existing power units use a single hydraulic or electric system, which is insufficient to meet the flexibility and efficiency requirements of mast-type self-propelled aerial work platforms under various working conditions.

[0004] Therefore, it is necessary to develop a new type of power unit for mast-type self-propelled aerial work platforms to meet the usage requirements. Utility Model Content

[0005] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a power unit for a mast-type self-propelled aerial work platform vehicle, which is characterized by small size, light weight, high power density and strong adaptability, and can meet the needs of different working conditions, thereby improving the flexibility and work efficiency of the work platform vehicle.

[0006] Technical solution: The present invention relates to a power unit for a mast-type self-propelled aerial work platform, characterized in that it includes an AC permanent magnet motor, a hydraulic gear pump, an in-tank return oil filter, an in-tank suction filter, an oil tank, and a functional valve group; the AC permanent magnet motor, the hydraulic gear pump, the in-tank suction filter, and the oil tank are connected in sequence; the hydraulic gear pump is connected to the functional valve group; and the oil tank is connected to the in-tank return oil filter.

[0007] The AC permanent magnet motor and the hydraulic gear pump are connected by a coupling to convert electrical energy into hydraulic energy to drive the device.

[0008] The AC permanent magnet motor is equipped with a speed sensor and a temperature sensor.

[0009] The functional valve group includes a check valve, an electro-proportional relief valve, a 2-position 4-way cartridge solenoid valve, a 2-position 2-way cartridge solenoid valve, a 2-position 4-way cartridge solenoid valve assembly one, a 2-position 4-way cartridge solenoid valve assembly two, an adjustable flow valve, and a check valve.

[0010] The oil tank is equipped with a liquid level sensor.

[0011] The one-way valve is connected to the hydraulic gear pump, the electro-proportional relief valve, the 2-position 4-way cartridge solenoid valve, and the 2-position 2-way cartridge solenoid valve, respectively.

[0012] The 2-position 4-way cartridge solenoid valve is connected to the 2-position 4-way cartridge solenoid valve assembly one and the 2-position 4-way cartridge solenoid valve assembly two, respectively.

[0013] The adjustable flow valve and the one-way throttle valve are connected respectively.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention is characterized by small size, light weight, high power density and strong adaptability, which can meet the needs of different working conditions, improve the flexibility and work efficiency of the work vehicle, meet the dual requirements of mast-type aerial work vehicles for space and performance, and at the same time simplify the system structure and reduce maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the principle and structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] In the diagram, 1 is an AC permanent magnet motor; 2 is a hydraulic gear pump; 3 is a check valve; 4 is an electro-proportional relief valve; 5 is a 2-position 4-way cartridge solenoid valve; 6 is a 2-position 2-way cartridge solenoid valve; 7 is a 2-position 4-way cartridge solenoid valve assembly one; 8 is a 2-position 4-way cartridge solenoid valve assembly two; 9 is an adjustable flow valve; 10 is a one-way throttle valve; 11 is an internal return oil filter; 12 is a suction oil filter; and 13 is an oil tank. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] This utility model discloses a power unit for a mast-type self-propelled aerial work platform, comprising an AC permanent magnet motor 1, a hydraulic gear pump 2, an internal return oil filter 11, a suction oil filter 12, an oil tank 13, and a functional valve assembly. The AC permanent magnet motor 1, hydraulic gear pump 2, suction oil filter 12, and oil tank 13 are connected sequentially. The hydraulic gear pump 2 is connected to the functional valve assembly. The oil tank 13 is connected to the internal return oil filter 11. The AC permanent magnet motor 1 and hydraulic gear pump 2 are connected via a coupling, converting electrical energy into hydraulic energy to drive the device. The AC permanent magnet motor 1 is equipped with a speed sensor and a temperature sensor. The functional valve assembly includes a one-way valve 3, an electro-proportional relief valve 4, a 2-position 4-way cartridge solenoid valve 5, a 2-position 2-way cartridge solenoid valve 6, a first 2-position 4-way cartridge solenoid valve assembly 7, a second 2-position 4-way cartridge solenoid valve assembly 8, an adjustable flow valve 9, and a one-way throttle valve 10. The oil tank 13 is equipped with a level sensor. One-way valve 3 is connected to hydraulic gear pump 2, electro-proportional relief valve 4, 2-position 4-way cartridge solenoid valve 5, and 2-position 2-way cartridge solenoid valve 6 respectively. 2-position 4-way cartridge solenoid valve 5 is connected to 2-position 4-way cartridge solenoid valve assembly 7 and 2-position 4-way cartridge solenoid valve assembly 8 respectively. Adjustable flow valve 9 and one-way throttle valve 10 are connected respectively.

[0020] like Figure 1 The hydraulic circuit design of this utility model is compact and reasonable, reducing the number of oil pipes and joints. The hydraulic gear pump 2 draws hydraulic oil from the oil tank 13 and provides hydraulic power to various parts of the work vehicle through the functional valve group. At the same time, an overload protection device - an electro-proportional relief valve 4 - is provided at the output end of the functional valve group to protect the power unit from overload damage.

[0021] like Figure 2 The power unit of this utility model is installed on the chassis of the mast-type self-propelled aerial work platform and connected to various parts of the platform via oil pipes. During operation, the AC permanent magnet motor 1 is precisely controlled by signals received from the speed and temperature sensors integrated in the AC permanent magnet motor 1, providing stable hydraulic power to the platform.

[0022] In practice, the structure and parameters of the power unit can be adjusted and optimized according to the specific needs of the work vehicle and the working environment. For example, appropriate motor and hydraulic pump models can be selected based on the weight and height requirements of the work vehicle; and an oil tank heating device can be added according to the temperature range of the working environment.

[0023] The electro-proportional relief valve 4 of this invention controls the relief pressure of the relief valve by inputting the current to the solenoid coil. The one-way valve 3 protects the hydraulic gear pump 2, preventing backflow of oil that could cause the hydraulic gear pump to reverse and damage it. The 2-position 4-way cartridge solenoid valve 5 has an emergency manual control function, allowing manual operation to lower the working platform in case of power failure or circuit malfunction. The 2-position 2-way cartridge solenoid valve 6 also has an emergency manual control function, allowing manual operation to lower the working platform in case of power failure or circuit malfunction. The 2-position 4-way cartridge solenoid valve assembly 7 has both emergency manual control and electro-proportional functions. The emergency function allows manual operation to lower the working platform in case of power failure or circuit malfunction, while the electro-proportional function controls the oil flow rate of the valve by controlling the current to the solenoid coil, thereby controlling the speed of mast raising and lowering. The adjustable flow valve 9 can be fully closed; when manual operation of the turntable is required, this valve is opened to create a passage, allowing manual operation of the turntable. The one-way throttle valve 10 controls the flow rate during oil return, thereby controlling the speed of mast lowering.

[0024] This utility model has the following advantages: 1. Small size and light weight: Through integrated design and compact layout, the size and weight of the power unit are greatly reduced, making it easier to install and use on mast-type self-propelled aerial work platforms. 2. Compact oil circuit design: The compact oil circuit design reduces the risk of leakage and improves the working efficiency and stability of the power unit. 3. Functional integration: The integrated design improves system stability and reliability and reduces maintenance costs. 4. Overload protection device: The overload protection device protects the power unit from overload damage and extends its service life.

[0025] This utility model features small size, light weight, high power density, and strong adaptability, which can meet the needs of different working conditions, improve the flexibility and work efficiency of the work vehicle, meet the dual requirements of mast-type aerial work platforms for space and performance, and at the same time simplify the system structure and reduce maintenance costs.

Claims

1. A power unit for a mast-type aerial platform, characterized by: Including alternating current permanent magnet motor (1), hydraulic gear pump (2), tank oil return filter (11), oil suction filter (12), oil tank (13) and function valve group, alternating current permanent magnet motor (1), hydraulic gear pump (2), oil suction filter (12), oil tank (13) are sequentially connected, hydraulic gear pump (2) is connected with function valve group, oil tank (13) is connected with tank oil return filter (11).

2. The mast-type aerial platform vehicle power unit of claim 1, wherein: Alternating current permanent magnet motor (1), hydraulic gear pump (2) are connected by shaft coupling.

3. The mast-type aerial platform vehicle power unit of claim 1, wherein: Alternating current permanent magnet motor (1) is equipped with speed sensor and temperature sensor.

4. The mast-type aerial platform vehicle power unit of claim 1, wherein: Function valve group includes check valve (3), electric proportional overflow valve (4), 2-position 4-way plug-in electromagnetic valve (5), 2-position 2-way plug-in electromagnetic valve (6), 2-position 4-way plug-in electromagnetic valve assembly one (7), 2-position 4-way plug-in electromagnetic valve assembly two (8), adjustable flow valve (9) and check throttle valve (10).

5. The mast-type aerial platform vehicle power unit of claim 1, wherein: Oil tank (13) is equipped with liquid level sensor.

6. The mast-type aerial platform vehicle power unit of claim 4, wherein: Check valve (3) is connected with hydraulic gear pump (2), electric proportional overflow valve (4), 2-position 4-way plug-in electromagnetic valve (5), 2-position 2-way plug-in electromagnetic valve (6) respectively.

7. The mast-type aerial platform vehicle power unit of claim 6, wherein: 2-position 4-way plug-in electromagnetic valve (5) is connected with 2-position 4-way plug-in electromagnetic valve assembly one (7), 2-position 4-way plug-in electromagnetic valve assembly two (8) respectively.

8. The mast-type aerial platform vehicle power unit of claim 7, wherein: Adjustable flow valve (9) and check throttle valve (10) are connected respectively.

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