A pure electric vehicle power take-off

Abstract

The utility model discloses a pure electric vehicle power take-off, which relates to the technical field of power transmission equipment, including a driving motor and a reducer, wherein an output flange is provided on the power output end of the reducer, and an oil cooler is provided outside the reducer, and the oil cooler is connected to the reducer. The pure electric power take-off operates independently, has high system efficiency, can reduce the energy consumption of the whole vehicle, and has low noise, thereby realizing zero-emission silent driving. The driving motor works to make the reducer work, and the power output end of the reducer drives the output flange to rotate, driving the external equipment connected to the output flange, and the lubricating oil in the reducer is cooled by the oil cooler, thereby reducing the heat of the lubricating oil, allowing the lubricating oil to work normally, and improving the service life of the entire device.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission equipment, in particular to a power take-off for a pure electric vehicle. Background Art

[0002] With the requirements of energy conservation and emission reduction, the rise in fuel prices, and the requirements for environmental noise in specific scenarios, major OEMs are currently focusing on the layout of pure electric vehicles. In addition to passenger cars, pure electric commercial vehicles have also developed rapidly. Most of them currently use high-power drive motors matched with traditional AMT transmissions. In the field of special vehicles, due to the need to connect external equipment (usually hydraulic pumps), both fuel-powered and pure electric-powered commercial vehicles basically use the traditional power take-off method, that is, an external mechanical power take-off is connected to the AMT intermediate shaft. This power take-off method requires the transmission to keep running all the time, especially in parking conditions, resulting in energy waste.

[0003] For example, a power take-off is disclosed on February 15, 2017 with publication number CN104191970B, including a power take-off housing provided with an inner cavity and an opening, wherein an extended intermediate shaft of a transmission for inputting power and an output gear shaft for outputting power are respectively mounted on the opening of the power take-off housing, and the extended intermediate shaft of the transmission is mounted at the rear end of the output shaft of the transmission; an input driving gear is mounted at the tail end of the extended intermediate shaft of the transmission, and the rear end face of the input driving gear is provided with face teeth; a power take-off input shaft is mounted in the inner cavity of the power take-off housing, an input passive gear is mounted at the head end of the input shaft of the power take-off, and the front end face of the input passive gear is provided with face teeth capable of meshing with the rear end face of the input active gear, and cylindrical teeth capable of meshing with the output gear mounted on the output gear shaft are also arranged on its circumference, and an output flange is mounted at the tail end of the output gear shaft.

[0004] When the power take-off disclosed above is working, when the power source is the engine, the engine and the transmission are required to keep running because of the need to drive external devices. At this time, the engine is in an idling state, the working efficiency is low and the combustion is incomplete, resulting in energy waste and pollution. When the power source is the motor, due to the limitation on the motor speed when parking, the motor basically works in the low-efficiency area, and because the pure electric commercial vehicle uses a high-power motor, the power consumption is high, resulting in energy waste and shortening the mileage of the whole vehicle. After long-term work, especially when parking, the heat generated by the reducer accumulates in the lubricating oil, causing the lubricating oil to age, resulting in the lubricating oil being unable to perform lubrication work normally, thereby reducing the service life of the entire power take-off. Summary of the invention

[0005] The purpose of the utility model is to provide a pure electric vehicle power take-off with longer service life, quietness and low energy consumption. A silent and intelligent solution that achieves zero carbon dioxide emissions provides a new choice for commercial vehicles. The motor-driven power take-off is a standardized, modular, plug-and-play integrated solution, including a motor, a reducer, and an output flange. An independent motor is controlled by a vehicle controller or a separate controller to drive an external device through a reducer and an output flange, thereby achieving complete separation from the vehicle's driving transmission system. It can run independently when parked, achieving the purpose of energy saving and emission reduction, and by reasonably selecting the speed ratio according to the required speed of the driving equipment, the motor always runs in the high-efficiency zone, further reducing energy consumption. At the same time, the oil cooler cools the lubricating oil in the reducer, thereby achieving normal operation of the reducer and increasing the service life of the entire device.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model to solve its technical problem is: a pure electric vehicle power take-off, including a drive motor and a reducer, an output flange is provided on the power output end of the reducer, an oil cooler is provided outside the reducer, and the oil cooler is connected to the reducer.

[0007] As a further solution of the utility model, the reducer includes a housing, an input shaft, an output shaft, a first gear and a second gear. The input shaft, the output shaft and the housing are connected through bearings. The end of the input shaft extending outside the housing is connected to the power output end of the motor, and the end of the output shaft extending outside the housing is connected to the output flange. The input shaft is connected to the first gear, the output shaft is connected to the second gear, and the first gear and the second gear are meshed.

[0008] As a further solution of the utility model, an oil pump is provided in the reducer, the oil inlet end of the oil cooler is connected to the oil pump, the oil outlet end of the oil cooler is connected to the reducer, and a driving mechanism for driving the oil pump is provided in the reducer.

[0009] As a further solution of the utility model, the driving mechanism includes a rotating shaft, a third gear and a fourth gear, one end of the rotating shaft is connected to the oil pump, the rotating shaft is connected to the housing through a bearing, the third gear is connected to the output shaft, the fourth gear is connected to the rotating shaft, and the third gear and the fourth gear are meshed.

[0010] As a further solution of the present invention, the input shaft, the output shaft and the end of the rotating shaft are connected to the housing through bearings.

[0011] As a further solution of the utility model, the oil cooler is communicated with the motor cooling water channel.

[0012] As a further solution of the utility model, the oil pump is a mechanical oil pump or an electronic oil pump.

[0013] The beneficial effects of the utility model are:

[0014] The power take-off is driven by an independent motor, which is separated from the vehicle's driving transmission system and can operate independently. Compared with traditional power take-offs, it is more economical and energy-saving.

[0015] Since this system is an independent drive system, it can realize product universalization and platformization, broaden the application models, and make little changes to the application models;

[0016] The system adopts electric drive, with high system efficiency and low noise, realizing zero-emission silent drive and broadening the application scenarios of the whole vehicle. The motor is used to control the torque and speed, which is simpler to control and more reliable than the traditional power take-off.

[0017] The system can be realized by using a "low-power" motor. By selecting the appropriate speed ratio, the motor efficiency range can be optimized to minimize energy consumption, extend battery life and vehicle cost.

[0018] The drive motor makes the reducer work, and the power output end of the reducer drives the output flange to rotate, driving the external equipment connected to the output flange. The lubricating oil in the reducer is cooled by the oil cooler, thereby reducing the heat of the lubricating oil. Even when the vehicle is parked, it can still dissipate heat normally, thereby increasing the service life of the entire device and improving the environmental adaptability of the entire vehicle.

[0019] The oil pump is driven by the third gear, the fourth gear and the rotating shaft in the reducer to output the oil in the reducer to the oil cooler for cooling. The flow of the lubricating oil is driven by the motor, making the entire device more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a power take-off for a pure electric vehicle of the utility model.

[0021] In the accompanying drawings: 1-driving motor, 2-reducer, 201-housing, 202-input shaft, 203-output shaft, 204-first gear, 205-second gear, 3-output flange, 4-oil cooler, 5-oil pump, 6-rotating shaft, 7-third gear, 8-fourth gear. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0024] like Figure 1 As shown, the power take-off of a pure electric vehicle includes a driving motor 1 and a reducer 2. An output flange 3 is provided on the power output end of the reducer 2. An oil cooler 4 is provided outside the reducer 2. The oil cooler 4 is connected to the reducer 2. Specifically, the driving motor 1 is a pure electric drive, so that the entire power take-off has zero emissions and works silently.

[0025] When in use, the driving motor 1 works to make the reducer 2 work, and the power output end of the reducer 2 drives the output flange 3 to rotate, driving the external equipment connected to the output flange 3, and the lubricating oil in the reducer 2 is cooled by the oil cooler 4, thereby reducing the heat of the lubricating oil, allowing the lubricating oil to work normally, and improving the service life of the entire device.

[0026] Specifically, refer to Figure 1 The reducer 2 includes a housing 201, an input shaft 202, an output shaft 203, a first gear 204 and a second gear 205. The input shaft 202 and the output shaft 203 are connected to the housing 201 through bearings. The end of the input shaft 202 extending outside the housing 201 is connected to the power output end of the motor 1, and the end of the output shaft 203 extending outside the housing 201 is connected to the output flange 3. The input shaft 202 is connected to the first gear 204, the output shaft 203 is connected to the second gear 205, and the first gear 204 and the second gear 2 05 meshing, the driving motor 1 works to make the input shaft 202 rotate, the input shaft 202 rotates to make the first gear 204 rotate, the first gear 204 rotates to make the second gear 205 rotate, the second gear 205 rotates to make the output shaft 203 rotate, the output shaft 203 rotates to make the output flange 3 rotate. Specifically, the power output end of the driving motor 1 is connected to the input shaft 202 through a spline, and the output shaft 203 is connected to the output flange 3 through a spline. In this embodiment, the input shaft 202 and the output shaft 203 are arranged side by side.

[0027] An oil pump 5 is provided in the reducer 2, the oil inlet end of the oil cooler 4 is connected to the oil pump 5, and the oil outlet end of the oil cooler 4 is connected to the reducer 2. A driving mechanism for driving the oil pump 5 is provided in the reducer 2. The operation of the driving mechanism causes the oil pump 5 to work, and then the lubricating oil in the reducer 2 is output to the oil cooler 4 for cooling. Specifically, the oil cooler 4 is connected to the lubricating oil circuit on the shell 201 through an oil pipe, and the oil pump 5 is arranged on the lower side of the shell 201.

[0028] The driving mechanism includes a rotating shaft 6, a third gear 7 and a fourth gear 8. One end of the rotating shaft 6 is connected to the oil pump 5. The rotating shaft 6 is connected to the housing 201 through a bearing. The third gear 7 is connected to the output shaft 203. The fourth gear 8 is connected to the rotating shaft 6. The third gear 7 and the fourth gear 8 are meshed. The output shaft 203 rotates to rotate the third gear 7. The third gear 7 rotates to rotate the rotating shaft 6. The rotation of the rotating shaft 6 rotates the oil pump 5.

[0029] The input shaft 202, the output shaft 203 and the ends of the rotating shaft 6 are connected to the housing 201 through bearings. The rotation of the input shaft 202, the output shaft 203 and the rotating shaft 6 is supported by the setting of the bearings, and a bearing is provided at both ends of the input shaft 202, the output shaft 203 and the rotating shaft 6 respectively.

[0030] The oil cooler 4 is connected to the cooling water channel of the motor 1. The vehicle coolant enters through the water inlet on the oil cooler, dissipates the heat of the lubricating oil, enters the motor water channel to cool the motor, and finally re-enters the vehicle cooling system through the water outlet on the motor housing.

[0031] The oil pump 5 is a mechanical oil pump or an electronic oil pump. In this embodiment, the oil pump 5 is a mechanical oil pump.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pure electric vehicle power take-off, comprising a drive motor (1) and a reducer (2), wherein an output flange (3) is provided on the power output end of the reducer (2), characterized in that: The reducer (2) is provided with an oil cooler (4) outside, and the oil cooler (4) is in communication with the reducer (2); The reducer (2) comprises a housing (201), an input shaft (202), an output shaft (203), a first gear (204) and a second gear (205); the input shaft (202), the output shaft (203) and the housing (201) are connected via bearings; one end of the input shaft (202) extending outside the housing (201) is connected to the power output end of the motor (1); one end of the output shaft (203) extending outside the housing (201) is connected to the output flange (3); the input shaft (202) is connected to the first gear (204); the output shaft (203) is connected to the second gear (205); and the first gear (204) and the second gear (205) are meshed; An oil pump (5) is provided in the reducer (2); an oil inlet end of the oil cooler (4) is in communication with the oil pump (5); an oil outlet end of the oil cooler (4) is in communication with the reducer (2); and a driving mechanism for driving the oil pump (5) is provided in the reducer (2); The driving mechanism comprises a rotating shaft (6), a third gear (7) and a fourth gear (8); one end of the rotating shaft (6) is connected to the oil pump (5); the rotating shaft (6) is connected to the housing (201) via a bearing; the third gear (7) is connected to the output shaft (203); the fourth gear (8) is connected to the rotating shaft (6); and the third gear (7) and the fourth gear (8) are meshed.

2. The pure electric vehicle power take-off according to claim 1, characterized in that: The input shaft (202), the output shaft (203) and the end of the rotating shaft (6) are connected to the housing (201) via bearings.

3. The power take-off device for a pure electric vehicle according to any one of claims 1-2, characterized in that: The oil cooler (4) is in communication with a motor cooling water channel.

4. The pure electric vehicle power take-off according to claim 3, characterized in that: The oil pump (5) is a mechanical oil pump or an electronic oil pump.

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