A crane power take-off system

Abstract

The utility model discloses a kind of crane power take-off system, including electromagnetic clutch motor, engine and power take-off transmission connection;The power take-off is connected with the torque input end of the electromagnetic clutch motor, and the torque output end of the electromagnetic clutch motor is connected oil pump;The electromagnetic clutch motor includes driving motor, first transmission shaft and second transmission shaft;The driving motor is connected the first transmission shaft by electromagnetic clutch transmission;The first transmission shaft is connected by gear transmission between the second transmission shaft;The torque input end and torque output end of the electromagnetic clutch motor are respectively second transmission shaft both ends;Engine and motor can be independently driven in the utility model, and various energy supply modes can reduce fuel consumption, improve the working time length and working efficiency of on-board operation, effectively reduce the use cost of vehicle.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission technology, specifically relating to a crane power take-off system. Background Technology

[0002] With the rapid development of hybrid power technology, engineering cranes are also moving towards low emissions, electrification, and intelligence, which places higher demands on the overall layout and performance of cranes. Traditional cranes use diesel engines for travel and operation, requiring high-power engines to meet travel and driving needs. However, the power required for onboard operations is relatively small, and diesel engines cannot operate in their high-efficiency range for extended periods, leading to increased operating costs. Using pure electric power for cranes, while balancing chassis travel and onboard operations, cannot solve the problems of poor range and high operating costs, and also struggles to meet the demands of special environments.

[0003] Currently, hybrid power systems are an effective way to solve the problems associated with a single drive unit. Existing technologies propose dual-fuel (oil and electric) power take-off systems, but if the engine drives the oil pump alone, the electric motor will idle, increasing rotational inertia, reducing system efficiency, and thus affecting the motor's lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide a crane power take-off system that provides an engine-only working state and a motor-only working state for the crane power take-off system. When the engine is driven independently, the problem of motor idling can be avoided by controlling the on and off of the electromagnetic clutch.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, this utility model provides a crane power take-off system, including an electromagnetic clutch motor, with an engine and a power take-off device connected in transmission; the power take-off device is connected to the torque input end of the electromagnetic clutch motor, and the torque output end of the electromagnetic clutch motor is connected to an oil pump; The electromagnetic clutch motor includes a drive motor, a first transmission shaft, and a second transmission shaft; the drive motor is connected to the first transmission shaft via an electromagnetic clutch; the first transmission shaft and the second transmission shaft are connected via gear transmission; the torque input end and torque output end of the electromagnetic clutch motor are respectively the two ends of the second transmission shaft; The crane's power take-off system has two modes: one where the engine operates alone and the other where the motor operates alone. When the engine operates alone, the electromagnetic clutch disengages, and the engine's power drives the oil pump through the power take-off unit and the second drive shaft. When the drive motor operates alone, the power take-off unit disengages, and the drive motor's power drives the oil pump through the first and second drive shafts.

[0006] Furthermore, flanges are provided on the torque input end and the torque output end.

[0007] Furthermore, the drive motor, electromagnetic clutch, first drive shaft, and second drive shaft are integrated into the mounting housing; the first drive shaft and the second drive shaft are rotatably connected to the mounting housing via bearings.

[0008] Furthermore, the engine is connected to the input shaft of the gearbox via a clutch, and the output shaft of the gearbox is connected to the power take-off (PTO).

[0009] Furthermore, the drive motor is electrically connected to the motor controller, the motor controller is electrically connected to the power battery, and the power battery is used to supply power to the drive motor; The motor controller obtains the SOC value of the power battery and controls the conduction or interruption of the circuit between the drive motor and the power battery based on the SOC value.

[0010] Furthermore, the electromagnetic clutch is initially in an open state; the motor controller obtains the real-time SOC value of the power battery, and when the SOC value is less than a set threshold, the crane power take-off system is set to pure fuel mode; when the SOC value is greater than or equal to a certain preset value, the crane power take-off system is set to pure electric mode.

[0011] Furthermore, the motor controller is electrically connected to the charger, the motor controller, and the body controller; When using a charger for plug-in operation, the motor controller obtains the operation energy consumption through the operation system controller; if the operation energy consumption is less than the preset energy consumption value, the motor controller controls the charger to supply power to the drive motor and charge the power battery at the same time; if the operation energy consumption is greater than or equal to the preset energy consumption value, the motor controller controls the charger and the power battery to supply power to the drive motor at the same time.

[0012] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: In this utility model, the crane power take-off system has an engine-only working state and a motor-only working state; both the engine and the motor can be driven independently, and multiple power supply methods can reduce fuel consumption, increase the working time and efficiency of on-board operations, and effectively reduce the vehicle's operating costs.

[0013] In this invention, when the engine is working alone, the electromagnetic clutch disengages, and the engine's power drives the oil pump through the power take-off and the second transmission shaft. This avoids the problem of the motor running idle, improves the engine's working efficiency, and effectively ensures the motor's service life, the system's reliability, and safety. Attached Figure Description

[0014] Figure 1This is a structural diagram of the crane power take-off system provided in Embodiment 1; Figure 2 This is a structural diagram of the electromagnetic clutch motor provided in Embodiment 1.

[0015] In the diagram, 1 is the drive motor, 2 is the electromagnetic clutch, 3 is the first transmission shaft, 5 is the bearing, 6 is the input flange, 7 is the output flange, and 8 is the mounting box. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0017] It should be noted that in the description of this utility model, the terms "front," "rear," "left," "right," "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "front," "rear," "left," "right," "upper," and "lower" used in the description of this utility model refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0018] like Figure 1 and Figure 2 As shown, this embodiment provides a crane power take-off system, including an electromagnetic clutch motor. An engine is connected to the input shaft of a gearbox via a clutch, and the output shaft of the gearbox is connected to the power take-off unit. The power take-off unit is connected to the torque input terminal of the electromagnetic clutch motor, and the torque output terminal of the electromagnetic clutch motor is connected to an oil pump. The electromagnetic clutch motor includes a drive motor 1, a first transmission shaft 3, and a second transmission shaft 4. The drive motor 1 is connected to the first transmission shaft 3 via an electromagnetic clutch 2. The first transmission shaft 3 and the second transmission shaft 4 are connected via gear transmission. The torque input end and torque output end of the electromagnetic clutch motor are respectively located at the two ends of the second transmission shaft 4. An input flange 6 is provided on the torque input end, and an output flange 7 is provided on the torque output end. This embodiment changes the direction of power transmission by changing the internal gear configuration of the electromagnetic clutch motor. It offers flexible arrangement, simple control method, and the ability to change the direction of power transmission through the electromagnetic clutch motor, facilitating vehicle layout.

[0019] The crane's power take-off (PTO) system can operate in two modes: engine-only and motor-only. The drive mode can be switched according to the crane's operational needs, enabling efficient energy utilization and solving problems such as high energy consumption, severe emissions, and poor economy associated with relying solely on a single engine. When the engine operates alone, the electromagnetic clutch 2 disengages, and the engine's power drives the oil pump via the PTO and the second drive shaft. This solves the problem of motor idling when the engine is driving alone, resulting in high efficiency and improved system reliability and safety. When the drive motor operates alone, the PTO disengages, and the drive motor's power drives the oil pump via the first and second drive shafts.

[0020] The drive motor 1, electromagnetic clutch 2, first drive shaft 3 and second drive shaft 4 are integrated into the mounting housing 8; the first drive shaft 3 and second drive shaft 4 are rotatably connected to the mounting housing 8 through bearings 5.

[0021] The drive motor 1 is electrically connected to the motor controller, and the motor controller is electrically connected to the power battery. The power battery is used to supply power to the drive motor. The motor controller acquires the SOC value of the power battery and controls the connection or disconnection of the circuit between the drive motor and the power battery based on the SOC value, specifically including: The electromagnetic clutch is initially in the disengaged state; the motor controller obtains the SOC value of the power battery in real time. When the SOC value is less than a set threshold, the crane power take-off system is set to pure fuel mode; when the SOC value is greater than or equal to a certain preset value, the crane power take-off system is set to pure electric mode.

[0022] The motor controller is electrically connected to the charger, the motor controller, and the body controller; When using a charger for plug-in operation, the motor controller obtains the operating energy consumption through the operating system controller. If the operating energy consumption is less than the preset energy consumption value, the motor controller controls the charger to supply power to the drive motor and simultaneously charge the power battery. If the operating energy consumption is greater than or equal to the preset energy consumption value, the motor controller controls both the charger and the power battery to supply power to the drive motor simultaneously. The system can flexibly switch between plug-in operation and power battery drive mode, selecting the optimal energy utilization method according to the operating environment and energy consumption situation, accurately controlling energy consumption, and avoiding energy waste.

[0023] The control process of the crane's power take-off system includes: When the target working mode is pure fuel mode, only the engine works. To start the engine, if the transmission is manual, you need to depress the clutch pedal, press the power take-off switch, engage the transmission in the specified gear, and release the clutch pedal to complete the power take-off operation (if the transmission is automatic, press the power take-off switch to complete the power take-off operation). The engine speed responds to the load demand, and the power is transmitted to the oil pump through the transmission, power take-off, and drive shaft, thereby driving the vehicle to work. At this time, the electromagnetic clutch is in the initial disengaged state, and the motor will not idle with the drive shaft.

[0024] When the target mode is pure electric working mode, press the pure electric drive working mode switch. At this time, the engine is turned off and the power take-off switch is turned off. After the body controller receives the feedback signal, the motor controller controls the electromagnetic clutch motor to start working. The electromagnetic clutch is closed, and the power is directly transmitted to the oil pump through the drive motor, the first drive shaft and the second drive shaft, thereby driving the vehicle to work.

[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A power take-off system for a crane, characterized in that, It includes an electromagnetic clutch motor, with the engine and power take-off (PTO) connected in a transmission; the PTO is connected to the torque input end of the electromagnetic clutch motor, and the torque output end of the electromagnetic clutch motor is connected to an oil pump; The electromagnetic clutch motor includes a drive motor, a first transmission shaft, and a second transmission shaft. The drive motor is connected to the first drive shaft via an electromagnetic clutch. The first drive shaft and the second drive shaft are connected by a gear transmission. The torque input end and torque output end of the electromagnetic clutch motor are respectively the two ends of the second transmission shaft; The crane's power take-off system can operate in two modes: engine-only and motor-only. When the engine is operating alone, the electromagnetic clutch disengages, and the engine's power drives the oil pump through the power take-off unit and the second drive shaft. When the drive motor operates independently, the power take-off is disconnected, and the power of the drive motor drives the oil pump through the first and second drive shafts.

2. The crane power take-off system according to claim 1, characterized in that, Flanges are provided on the torque input end and the torque output end.

3. The crane power take-off system according to claim 1, characterized in that, The drive motor, electromagnetic clutch, first drive shaft, and second drive shaft are integrated into the mounting housing; the first drive shaft and the second drive shaft are rotatably connected to the mounting housing via bearings.

4. The crane power take-off system according to claim 1, characterized in that, The engine is connected to the input shaft of the gearbox via a clutch, and the output shaft of the gearbox is connected to the power take-off (PTO).

5. The crane power take-off system according to claim 1, characterized in that, The drive motor is electrically connected to the motor controller, and the motor controller is electrically connected to the power battery. The power battery is used to supply power to the drive motor. The motor controller obtains the SOC value of the power battery and controls the conduction or interruption of the circuit between the drive motor and the power battery based on the SOC value.

6. The crane power take-off system according to claim 1, characterized in that, The electromagnetic clutch is initially in the disengaged state; the motor controller obtains the SOC value of the power battery in real time. When the SOC value is less than a set threshold, the crane power take-off system is set to pure fuel mode; when the SOC value is greater than or equal to a certain preset value, the crane power take-off system is set to pure electric mode.

7. The crane power take-off system according to claim 1, characterized in that, The motor controller is electrically connected to the charger, the motor controller, and the body controller; When using a charger for plug-in operation, the motor controller obtains the operation energy consumption through the operation system controller; if the operation energy consumption is less than the preset energy consumption value, the motor controller controls the charger to supply power to the drive motor and charge the power battery at the same time; if the operation energy consumption is greater than or equal to the preset energy consumption value, the motor controller controls the charger and the power battery to supply power to the drive motor at the same time.

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