Portable power unit and crane

Abstract

The utility model discloses a portable power unit and a crane, the portable power unit comprises a shell, the shell is internally provided with a power battery, a PDU, an all-in-one controller, a motor, a transmission shaft, a first hydraulic oil pump, an OBC and a first controller; the all-in-one controller is connected with the PDU, the motor, the OBC and the first controller, the PDU is connected with the power battery, the motor is connected with the first hydraulic oil pump through a transmission shaft, the motor provides power for the first hydraulic oil pump, and the first controller is used for communicating with external equipment. The utility model designs a power unit, the power unit can be independent of the whole machine, is convenient to disassemble, assemble and carry, can drive a hydraulic oil pump through electric energy, provides hydraulic energy for the operation of the whole machine, and can realize electric operation and reduce fuel consumption and emission only by simply transforming a hydraulic system of a traditional crane.

Description

Technical Field

[0001] The utility model discloses a portable power unit and a crane, and relates to the technical field of engineering machinery. Background Art

[0002] Traditional cranes are powered by diesel engines. Limited by the efficiency of fuel-powered engines, they have low fuel efficiency and poor economic benefits. Especially with the implementation of the China VI emission standards, the engines often require frequent parking and regeneration during extended engine operation. With increasingly stringent emission standards and rising fuel costs, electric-powered cranes are gaining popularity due to their energy-saving and environmentally friendly features, low noise levels, fast response times, and low operating costs. Electrification has become a new trend in the crane industry. Currently, the mainstream technology paths for crane electrification include hybrid, pure electric, and plug-in. Hybrid and pure electric cranes have relatively high incremental costs, making it difficult for users to quickly recoup the purchase price, and thus have yet to be widely adopted. Plug-in cranes offer relatively low incremental costs and significant market sales, but are only suitable for newly developed models. Retrofitting and modification of aftermarket vehicles is complex, and some models lack the necessary space for installation. Given the enormous crane market, further promotion of electrification is necessary. Summary of the Invention

[0003] In response to the defects in the above-mentioned background technology, the present invention provides a portable power unit and a crane, which drives a hydraulic oil pump through electric energy to provide hydraulic energy for the operation of the entire crane, realize electric operation, and reduce fuel consumption and emissions.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a portable power unit, comprising: a housing, wherein the housing is provided with: a power battery, a PDU, an all-in-one controller, a motor, a transmission shaft, a first hydraulic oil pump, an OBC, and a first controller;

[0005] The all-in-one controller is connected to the PDU, motor, OBC and the first controller respectively.

[0006] The PDU is connected to the power battery and is used to achieve pure electric operation through the power battery energy.

[0007] The motor is connected to the first hydraulic oil pump via a transmission shaft, and the motor provides power to the first hydraulic oil pump.

[0008] The first controller is used for communicating with an external device.

[0009] Furthermore, it also includes a display screen, and the first controller is connected to the display screen and the first hydraulic oil pump.

[0010] Furthermore, the OBC is connected to an AC charging socket via a line, and is used to realize plug-in operation by connecting to the mains.

[0011] The PDU is connected to the DC charging socket via a line.

[0012] The all-in-one controller is connected to the first 24V DC output interface via a line.

[0013] The first controller is connected to the first low-voltage signal interface via a line,

[0014] The AC charging socket, DC charging socket, first 24V DC output interface, and first low-voltage signal interface are all arranged on the surface of the shell.

[0015] Furthermore, the first hydraulic oil pump is provided with a first hydraulic oil inlet interface and a first hydraulic oil outlet interface through pipelines, and the first hydraulic oil inlet interface and the first hydraulic oil outlet interface are respectively provided on the surface of the housing.

[0016] Furthermore, the motor is a three-phase permanent magnet synchronous motor.

[0017] Furthermore, a tool box is provided inside the housing for storing external cables.

[0018] A crane adapted for a portable power unit comprises: a low-voltage battery, a second controller, a second hydraulic oil pump, a second hydraulic oil tank, and an action system, wherein the oil outlet of the second hydraulic oil tank is connected to the oil inlet of the second hydraulic oil pump, the oil outlet of the second hydraulic oil pump is connected to the oil inlet of the action system, and the oil outlet of the action system is connected to the oil return port of the second hydraulic oil tank.

[0019] The second controller is connected to the second low-voltage signal interface via a line, and the second low-voltage signal interface is used to be correspondingly connected to the first low-voltage signal interface;

[0020] The low-voltage battery is connected to the second 24V DC input interface through a line, and the second 24V DC input interface is used to be connected to the first 24V DC output interface accordingly;

[0021] The first hydraulic oil inlet interface at the power unit end is connected to the second hydraulic oil inlet interface at the whole machine end through a hydraulic pipeline, and the hydraulic oil inlet interface at the whole machine end is connected in parallel with the second hydraulic oil inlet pipeline at the whole machine end through a hydraulic pipeline. The second hydraulic oil inlet pipeline is connected to the oil outlet of the second hydraulic oil tank to provide hydraulic oil for the operation of the first hydraulic oil pump at the power unit end;

[0022] The first hydraulic oil outlet interface at the power unit end is connected to the second hydraulic oil outlet interface at the whole machine end through a hydraulic pipeline. The second hydraulic oil outlet interface at the whole machine end is connected in parallel with the hydraulic oil outlet pipeline at the whole machine end through a hydraulic pipeline to provide hydraulic energy for the operation of the motion system at the whole machine end.

[0023] Furthermore, a one-way valve is provided at the front end of each hydraulic oil outlet pipeline of the first hydraulic oil pump and the second hydraulic oil pump.

[0024] Beneficial effects: The present invention designs a power unit, which can be independent of the whole machine and is easy to disassemble and carry. The hydraulic oil pump can be driven by electricity to provide hydraulic energy for the operation of the whole machine. Only a simple modification of the hydraulic system of the traditional crane is required to realize electric operation and reduce fuel consumption and emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the present utility model. DETAILED DESCRIPTION

[0026] The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are not intended to limit the scope of protection of the present invention.

[0027] like Figure 1 An embodiment shown, this embodiment includes: a portable power unit, including: a power battery 1, a PDU 2, an all-in-one controller 3, a motor 4, a transmission shaft 5, a first hydraulic oil pump 6, an OBC 7, and a first controller 8;

[0028] The all-in-one controller 3 is connected to the PDU 2, the motor 4, the OBC 7 and the first controller 8 respectively.

[0029] The all-in-one controller 3 integrates three functional modules: a high-voltage power distribution unit, a motor controller, and a high-voltage to low-voltage conversion unit. The high-voltage power distribution unit distributes and manages the high-voltage DC power provided by the power battery and the OBC. The motor controller converts DC power into three-phase AC power to drive the motor 4. The high-voltage to low-voltage conversion unit converts high-voltage DC power into 24V DC power.

[0030] The PDU 2 is connected to the power battery 1. The PDU 2 integrates a BMS, which can realize power distribution, charge and discharge control, safety protection, status monitoring, fault diagnosis and management of the power battery, and is used to realize pure electric operation through the power battery energy.

[0031] The motor 4 is connected to the first hydraulic oil pump 6 via a transmission shaft 5, and the motor 4 provides power for the first hydraulic oil pump 6.

[0032] The first controller 8 is used to communicate with external devices.

[0033] It also includes: a display screen 9, the first controller 8 is connected to the display screen 9 and the first hydraulic oil pump 6, and the display screen 9 can display information such as the power of the power battery 1, the speed of the motor 4, and the fault code.

[0034] The OBC 7 is connected to the AC charging socket 26 via a line, and is used to connect to the mains to achieve plug-in operation. The OBC 7 can convert the three-phase AC power from the grid into DC power.

[0035] The PDU2 is connected to the DC charging socket 27 via a line.

[0036] The all-in-one controller 3 is connected to the first 24V DC output interface 23 via a line.

[0037] The first controller 8 is connected to the first low-voltage signal interface 20 via a line.

[0038] The AC charging socket 26 , the DC charging socket 27 , the first 24V DC output interface 23 , and the first low-voltage signal interface 20 are all arranged on the surface of the housing.

[0039] The first hydraulic oil pump 6 is provided with a first hydraulic oil inlet interface 12 and a first hydraulic oil outlet interface 15 through pipelines. The first hydraulic oil inlet interface 12 and the first hydraulic oil outlet interface 15 are respectively provided on the surface of the housing.

[0040] The motor 4 is a three-phase permanent magnet synchronous motor.

[0041] A tool box 10 is provided inside the housing for storing external cables 11 .

[0042] A crane adapted for a portable power unit comprises: a low-voltage battery 25, a second controller 22, a second hydraulic oil pump 18, a second hydraulic oil tank, and an action system, wherein the oil outlet of the second hydraulic oil tank is connected to the oil inlet of the second hydraulic oil pump 18, the oil outlet of the second hydraulic oil pump 18 is connected to the oil inlet of the action system, and the oil outlet of the action system is connected to the oil return port of the second hydraulic oil tank.

[0043] The second controller 22 is connected to the second low-voltage signal interface 21 through a line, and the second low-voltage signal interface 21 is used to be connected to the first low-voltage signal interface 20; the second controller 22 on the whole machine side can communicate with the first controller 8, and control the power unit motor speed and hydraulic oil pump displacement according to the control signal transmitted by the second controller 22 on the whole machine side, and adjust the speed of the whole machine side operation. At the same time, it can also return information such as the power unit motor speed, hydraulic oil pump displacement and power battery power to the whole machine side controller 22.

[0044] The low-voltage battery 25 is connected to the second 24V DC input interface 24 through a line, and the second 24V DC input interface 24 is used to connect to the first 24V DC output interface 23;

[0045] The first hydraulic oil inlet interface 12 on the power unit end is connected to the second hydraulic oil inlet interface 13 on the whole machine end through a hydraulic pipeline, and the hydraulic oil inlet interface 13 on the whole machine end is connected in parallel with the second hydraulic oil inlet pipeline 14 on the whole machine end through a hydraulic pipeline. The second hydraulic oil inlet pipeline 14 is connected to the oil outlet of the second hydraulic oil tank to provide hydraulic oil for the operation of the first hydraulic oil pump 6 on the power unit end;

[0046] The first hydraulic oil outlet interface 15 at the power unit end is connected to the second hydraulic oil outlet interface 16 at the whole machine end through a hydraulic pipeline. The second hydraulic oil outlet interface 16 at the whole machine end is connected in parallel with the hydraulic oil outlet pipeline 17 at the whole machine end through a hydraulic pipeline to provide hydraulic energy for the operation of the motion system at the whole machine end.

[0047] A one-way valve 19 is provided at the front end of each hydraulic oil outlet pipeline of the first hydraulic oil pump 6 and the second hydraulic oil pump 18 to prevent the hydraulic oil from flowing between the first hydraulic oil pump 6 at the power unit end and the second hydraulic oil pump 18 at the whole machine end.

[0048] During operation of this embodiment, the power unit end is docked with the whole machine end to complete the connection of the oil circuit and the line. The first low-voltage signal interface 20 of the power unit is connected to the second low-voltage signal interface 21 of the whole machine end through a low-voltage signal line. The second low-voltage signal interface 21 of the whole machine end is connected to the whole machine end controller 22 through a low-voltage signal line to realize mutual communication between the whole machine end controller and the power unit controller. The first 24V DC output interface 23 of the power unit end is connected to the second 24V DC input interface 24 of the whole machine end through a low-voltage DC wiring harness. The second 24V DC input interface 24 of the whole machine end is connected to the low-voltage battery 25 of the whole machine end through a low-voltage DC wiring harness to provide 24V DC power for the whole machine, avoiding the low-voltage battery feeding during long-term operation of the whole machine. The charging gun at one end of the external cable 11 is connected to the AC charging socket 26, and the terminal at the other end is connected to the power grid end. 380V AC power is obtained from the power grid end to power the power unit for long-term operation. When DC charging conditions are met, the DC charging gun is connected to the DC charging socket 27 to quickly replenish the power battery.

[0049] The present invention designs a power unit, which is independent of the whole machine and is easy to disassemble, assemble and carry. The power unit has two operating modes: plug-in and pure electric. When the construction site has the conditions for plugging in, the external cable is connected to the AC charging socket of the power unit and the power distribution facilities at the construction site, and the plug-in operating mode is selected through the operating mode selection switch on the whole machine end. In this mode, the power grid and the power battery jointly provide power for the power unit motor to operate; when the construction site does not have the conditions for plugging in, the pure electric operating mode is selected through the operating mode selection switch on the whole machine end. In this mode, the power battery alone provides power for the power unit motor to operate, and the motor drives the hydraulic oil pump through the transmission shaft to provide hydraulic energy for the operation of the whole machine.

[0050] The present invention only requires simple additions and modifications to traditional cranes to enable them to achieve electric operation, reduce fuel consumption and emissions, and the increased cost is relatively low, so users can quickly recover the cost. This is of great significance for promoting the electrification of cranes.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A crane, characterized in that , using a portable power unit, the portable power unit comprises: a housing, wherein the housing is provided with: a power battery (1), a PDU (2), an all-in-one controller (3), a motor (4), a transmission shaft (5), a first hydraulic oil pump (6), an OBC (7), and a first controller (8); The all-in-one controller (3) is connected to the PDU (2), motor (4), OBC (7) and first controller (8) respectively. The PDU (2) is connected to the power battery (1) and is used to realize pure electric operation through the energy of the power battery (1). The motor (4) is connected to the first hydraulic oil pump (6) via a transmission shaft (5), and the motor (4) provides power to the first hydraulic oil pump (6). The first controller (8) is used to communicate with external devices; The crane comprises: a low-voltage battery (25), a second controller (22), a second hydraulic oil pump (18), a second hydraulic oil tank and an action system, wherein the oil outlet of the second hydraulic oil tank is connected to the oil inlet of the second hydraulic oil pump (18), the oil outlet of the second hydraulic oil pump (18) is connected to the oil inlet of the action system, and the oil outlet of the action system is connected to the oil return port of the second hydraulic oil tank. The second controller (22) is connected to the second low-voltage signal interface (21) via a line, and the second low-voltage signal interface (21) is used to be correspondingly connected to the first low-voltage signal interface (20); The low-voltage battery (25) is connected to the second 24V DC input interface (24) via a line, and the second 24V DC input interface (24) is used to be connected to the first 24V DC output interface (23) accordingly; The first hydraulic oil inlet interface (12) at the power unit end is connected to the second hydraulic oil inlet interface (13) at the whole machine end through a hydraulic pipeline, and the second hydraulic oil inlet interface (13) at the whole machine end is connected in parallel to the second hydraulic oil inlet pipeline (14) at the whole machine end through a hydraulic pipeline. The second hydraulic oil inlet pipeline (14) is connected to the oil outlet of the second hydraulic oil tank to provide hydraulic oil for the operation of the first hydraulic oil pump (6) at the power unit end. The first hydraulic oil outlet interface (15) at the power unit end is connected to the second hydraulic oil outlet interface (16) at the whole machine end through a hydraulic pipeline, and the second hydraulic oil outlet interface (16) at the whole machine end is connected in parallel to the hydraulic oil outlet pipeline (17) at the whole machine end through a hydraulic pipeline, thereby providing hydraulic energy for the operation of the motion system at the whole machine end.

2. The crane according to claim 1, characterized in that It also includes a display screen (9), and the first controller (8) is connected to the display screen (9) and the first hydraulic oil pump (6).

3. The crane according to claim 1, wherein: The OBC (7) is connected to the AC charging socket (26) via a line, and is used to realize plug-in operation by connecting to the mains. The PDU (2) is connected to the DC charging socket (27) via a line. The all-in-one controller (3) is connected to the first 24V DC output interface (23) via a line. The first controller (8) is connected to the first low-voltage signal interface (20) via a line. The AC charging socket (26), the DC charging socket (27), the first 24V DC output interface (23), and the first low-voltage signal interface (20) are all arranged on the surface of the housing.

4. The crane according to claim 3, characterized in that The first hydraulic oil pump (6) is provided with a first hydraulic oil inlet interface (12) and a first hydraulic oil outlet interface (15) through pipelines, and the first hydraulic oil inlet interface (12) and the first hydraulic oil outlet interface (15) are respectively provided on the surface of the housing.

5. The crane according to claim 1, wherein: The motor (4) is a three-phase permanent magnet synchronous motor.

6. The crane according to claim 1, wherein: A tool box (10) is provided inside the housing for storing external cables.

7. The crane according to claim 1, wherein: A one-way valve (19) is provided at the front end of each hydraulic oil outlet pipeline of the first hydraulic oil pump (6) and the second hydraulic oil pump (18).

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