Cooling system of dual-motor hybrid gearbox

Abstract

The utility model belongs to the technical field of gearbox cooling, and particularly relates to a dual-motor hybrid gearbox cooling system. A dual-motor hybrid gearbox cooling system comprises a gearbox shell, a first cooling mechanism is arranged in the gearbox shell, and the first cooling mechanism is connected with a second cooling mechanism; lubricating oil cools the first motor stator and the winding through the first oil spraying ring. The lubricating oil cools the second motor stator and the winding through the second oil spraying ring; lubricating oil can cool the first motor rotor shaft through the first oil hole, and the lubricating oil can cool the second motor rotor shaft through the second oil hole. The cooling efficiency of the gearbox is greatly improved, the potential efficiency of the motor is excavated, the power density and the torque density of the motor are improved, and the running reliability and safety of a vehicle are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to a kind of gearbox cooling technical field, specifically, the utility model relates to a kind of double-motor hybrid gearbox cooling system. BACKGROUND

[0002] The gearbox cooling system plays a crucial role in modern vehicles, especially in automatic transmissions. With the advancement of automotive technology and the improvement of vehicle performance, the load and power density of the gearbox are increasing, which makes the thermal management of the gearbox an important research topic. During operation, the gearbox generates a large amount of heat, especially under high load or long-term operation. If this heat cannot be effectively dissipated, it may cause the gearbox oil temperature to be too high, thereby affecting the performance and service life of the gearbox. High temperature not only causes the viscosity of the lubricating oil to decrease, thereby affecting the lubrication effect, but also may accelerate the oxidation and deterioration of the oil. In addition, overheating may cause the plastic and rubber components inside the gearbox to age, accelerating wear and failure. To effectively control the temperature of the gearbox, cooling water passes through a dedicated oil cooler to absorb the heat of the gearbox oil, and then flows back to the vehicle radiator for cooling. In this way, the temperature of the gearbox oil can be maintained within a desired operating range.

[0003] Chinese patent (publication number: 118361522A) discloses a cooling lubrication system and a hybrid gearbox. The cooling lubrication system comprises a valve sleeve, a valve core, an oil tank and an oil cooler. The inside of the valve sleeve has a chamber, a first liquid flow channel and a second liquid flow channel. The oil tank is connected to the inlet end of the oil cooler through the first liquid flow channel, and the oil tank is connected to the outlet end of the oil cooler through the second liquid flow channel. The valve core is at least partially located in the chamber and is movably connected with the valve sleeve. There is a gap between the first end of the valve core and the end wall of the chamber to form a pressure chamber, which is in communication with the oil tank.

[0004] The existing oil cooling structure of the gearbox has low cooling efficiency, resulting in low motor efficiency and low potential energy utilization rate of the motor. UTILITY MODEL CONTENTS

[0005] The utility model is to solve the above-mentioned problem, the purpose is to provide a kind of oil cooling structure for double-motor hybrid gearbox, improve gearbox cooling efficiency, tap the potential energy of motor, improve the power density and torque density of motor, strengthen the operation reliability and safety of vehicle. To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a kind of double-motor hybrid gearbox cooling system, comprising gearbox shell, first cooling mechanism is provided in the gearbox shell, the first cooling mechanism is connected with second cooling mechanism.

[0006] The first cooling mechanism comprises an oil pump and an oil cooler, the oil pump is arranged on a gearbox shell, an oil cooler connecting oil cooler inlet is connected to the oil pump outlet, a shell oil channel is connected to the oil cooler outlet, and a second cooling mechanism is connected to the shell oil channel.

[0007] The second cooling mechanism comprises a first oil shower ring, the first oil shower ring is sleeved on the first motor stator, a second oil shower ring is sleeved on the second motor stator, a first oil hole is arranged on the first motor rotor shaft, a second oil hole is arranged on the second motor rotor shaft, and the first oil shower ring, the second oil shower ring, the first oil hole and the second oil hole are communicated with the shell oil channel.

[0008] A temperature sensor is arranged on one side of the gearbox shell, and the temperature sensor is connected with a controller.

[0009] The second oil shower ring is communicated with a first oil injection pipe and a second oil injection pipe, the first oil injection pipe is arranged on a clutch, and the second oil injection pipe is arranged on a transmission gear bearing.

[0010] The first oil shower ring is provided with a first oil shower hole, and the second oil shower ring is provided with a second oil shower hole.

[0011] The first oil shower hole is arranged on the first oil shower ring in a circumferential symmetry mode, and the second oil shower hole is arranged on the second oil shower ring in a circumferential symmetry mode.

[0012] A first reinforcing rib is arranged at the connection position between the oil pump and the gearbox shell, and the first reinforcing rib is arranged at equal intervals.

[0013] The technical effect of the utility model is that: the lubricating oil is firstly filtered by the gearbox shell, the oil pump delivers the lubricating oil to the oil cooler for cooling, then the lubricating oil is transported to the first oil shower ring through the shell oil channel, the first motor stator and the winding are cooled by the lubricating oil of the first oil shower ring; the second oil shower ring is communicated with the shell oil channel, the lubricating oil is transported to the second oil shower ring through the shell oil channel, and the second motor stator and the winding are cooled by the lubricating oil of the second oil shower ring; the first motor rotor shaft is cooled by the first oil hole, and the second motor rotor shaft is cooled by the second oil hole. The temperature sensor is connected with the controller, and is used for transmitting the detected temperature signal to the controller, and the controller controls the working state of the automobile heat dissipation system according to the received temperature signal; the gearbox cooling efficiency can be improved, the potential efficiency of the motor can be tapped, the power density and torque density of the motor can be improved, and the operation reliability and safety of the vehicle can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present specification comprises the following drawings, and the shown contents are respectively:

[0015] Fig. 1 is a kind of double-motor hybrid gearbox cooling system overall structure diagram of the utility model

[0016] Fig. 2 is the first oil injection pipe and the second oil injection pipe connection position schematic diagram of the utility model a kind of double-motor hybrid gearbox cooling system;

[0017] Fig. 3 is the first motor and the second motor and shell oil channel connection schematic diagram of the utility model a kind of double-motor hybrid gearbox cooling system;

[0018] Fig. 4 is the first motor cooling oil circuit schematic diagram of the utility model a kind of double-motor hybrid gearbox cooling system;

[0019] Fig. 5 is the second motor cooling oil circuit schematic diagram of the utility model a kind of double-motor hybrid gearbox cooling system.

[0020] In the figure, marked: 1, gearbox shell;101, first motor;102, second motor;103, first reinforcing rib;2, first cooling mechanism;201, oil pump;202, oil cooler;203, shell oil channel;3, second cooling mechanism;301, first oil shower ring;302, second oil shower ring;303, first oil hole;304, second oil hole;305, first oil injection pipe;306, second oil injection pipe;307, first oil shower hole;308, second oil shower hole;4, temperature sensor. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application are further described in detail below with reference to the drawings, and the purpose is to help the skilled in the art to have more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help its implementation.

[0022] As Figs. 1-5 shown, a kind of double-motor hybrid gearbox cooling system, including gearbox shell 1, first cooling mechanism 2 is provided in gearbox shell 1, first cooling mechanism 2 is connected with second cooling mechanism 3.Gearbox shell 1 is used to provide the installation position of first motor 101 and second motor 102, the common effect of first cooling mechanism 2 and second cooling mechanism 3 can realize the cooling inside gearbox shell 1.

[0023] The first cooling mechanism 2 comprises an oil pump 201 and an oil cooler 202, the oil pump 201 is arranged on the gearbox housing 1, the oil pump 201 is connected with the oil cooler 202, the oil cooler 202 is connected with the housing oil channel 203, the housing oil channel 203 is connected with the second cooling mechanism 3, the first motor 101 and the second motor 102 are arranged in the gearbox housing 1. The lubricating oil is firstly filtered by the suction filter in the gearbox housing 1, then the lubricating oil is transported to the oil cooler 202 by the oil pump 201 for cooling, and then the lubricating oil is transported to the second cooling mechanism 3 by the housing oil channel 203 for cooling specific parts by the second cooling mechanism 3.

[0024] The second cooling mechanism 3 comprises a first oil shower ring 301, the first oil shower ring 301 is sleeved on the stator of the first motor 101, the second motor 102 is sleeved with a second oil shower ring 302; a first oil hole 303 is arranged on the rotor shaft of the first motor 101, a second oil hole 304 is arranged on the rotor shaft of the second motor 102, the first oil shower ring 301, the second oil shower ring 302, the first oil hole 303, the second oil hole 304 and the third oil hole 305 are communicated with the housing oil channel 203; the first oil shower ring 301 is connected with the housing oil channel 203, the lubricating oil is transported to the first oil shower ring 301 through the housing oil channel 203, and the lubricating oil is cooled by the first oil shower ring 301 for the stator and winding of the first motor 101; the second oil shower ring 302 is communicated with the housing oil channel 203, the lubricating oil is transported to the second oil shower ring 302 through the housing oil channel 203, and the lubricating oil is cooled by the second oil shower ring 302 for the stator and winding of the second motor 102; the lubricating oil can cool the rotor shaft of the first motor 101 through the first oil hole 303, and the lubricating oil can cool the rotor shaft of the second motor 102 through the second oil hole 304.

[0025] A temperature sensor 4 is arranged on one side of the gearbox housing 1, and the temperature sensor 4 is connected with a controller. The temperature sensor 4 is arranged on the gearbox housing 1, and is used for detecting the temperature of the gearbox housing 1; the temperature sensor 4 is connected with the controller, the controller is a DHT controller, the temperature sensor 4 is used for transmitting the detected temperature signal to the controller, and the controller controls the working state of the automobile heat dissipation system according to the received temperature signal.

[0026] A first oil injection pipe 305 is arranged on the clutch, a second oil injection pipe 306 is arranged on the motor transmission gear shaft, and the first oil injection pipe 305 and the second oil injection pipe 306 are communicated with the second oil shower ring 302. The first oil injection pipe 305 can spray oil to cool the clutch, and the second oil injection pipe 306 can spray oil to cool the motor transmission gear bearing.

[0027] The first oiling ring 301 is provided with a first oiling hole 307, and the second oiling ring 302 is provided with a second oiling hole 308. The lubricating oil can be sprayed out of the first oiling hole 307 to cool the stator and winding of the first motor 101, and the second oiling hole 308 can be sprayed out of the second oiling hole 308 to cool the stator and winding of the second motor 102.

[0028] The first oiling hole 307 is circumferentially symmetrically arranged on the first oiling ring 301, so that the oil cooling efficiency is higher, and the stator and winding of the first motor 101 can be completely cooled. The second oiling hole 308 is circumferentially symmetrically arranged on the second oiling ring 302, so that the oil cooling efficiency is higher, and the stator and winding of the second motor 102 can be completely cooled.

[0029] The oil pump 201 is provided with a first reinforcing rib 103 at the connection with the transmission case 1, and the first reinforcing rib 103 is arranged at equal intervals. The equal interval arrangement of the first reinforcing rib 103 can make the connection between the oil pump 201 and the transmission case 1 more stable.

[0030] Effects of the embodiment

[0031] The lubricating oil is first filtered by the suction filter in the transmission case 1, and then the lubricating oil is transported to the oil cooler 202 by the oil pump 201 for cooling. Then the lubricating oil is transported to the first oiling ring 301 by the case oil channel 203, and the lubricating oil is cooled by the first oiling ring 301 to cool the stator and winding of the first motor 101. The second oiling ring 302 is communicated with the case oil channel 203, and the lubricating oil is transported to the second oiling ring 302 by the case oil channel 203, and the lubricating oil is cooled by the second oiling ring 302 to cool the stator and winding of the second motor 102. The lubricating oil can cool the rotor shaft of the first motor 101 through the first oil hole 303, and the lubricating oil can cool the rotor shaft of the second motor 102 through the second oil hole 304. The temperature sensor 4 is connected with the controller, and is used for transmitting the detected temperature signal to the controller. The controller controls the working state of the automobile cooling system according to the received temperature signal.

[0032] The above has been described by way of example with reference to the drawings. Obviously, the specific implementation of the present application is not limited to the above-mentioned manner. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the present application, or the above-mentioned concept and technical scheme of the present application are directly applied to other occasions without improvement, they are all within the protection scope of the present application.

Claims

1. A dual-motor hybrid transmission cooling system, characterized in that, The gearbox housing (1) is provided with a first cooling mechanism (2) inside, the first cooling mechanism (2) is connected with a second cooling mechanism (3); the first cooling mechanism (2) comprises an oil pump (201) and an oil cooler (202), the oil pump (201) is arranged on the gearbox housing (1), the oil outlet of the oil pump (201) is connected with the oil inlet of the oil cooler (202), the oil outlet of the oil cooler (202) is connected with a housing oil channel (203), the housing oil channel (203) is connected with the second cooling mechanism (3), the gearbox housing (1) is provided with a first motor (101) and a second motor (102); the second cooling mechanism (3) comprises a first oil shower ring (301), the first oil shower ring (301) is sleeved on the stator of the first motor (101), the stator of the second motor (102) is sleeved with a second oil shower ring (302); the first oil shower ring (301), the second oil shower ring (302), the first oil hole (303) and the second oil hole (304) are communicated with the housing oil channel (203).

2. The dual-motor hybrid transmission cooling system of claim 1, wherein: The gearbox housing (1) is provided with a temperature sensor (4) on one side, and the temperature sensor (4) is connected with a controller.

3. The dual-motor hybrid transmission cooling system of claim 1, wherein: The second oil shower ring (302) is communicated with a first oil injection pipe (305) and a second oil injection pipe (306), the first oil injection pipe (305) is arranged on the clutch, and the second oil injection pipe (306) is arranged on the transmission gear bearing.

4. The dual-motor hybrid transmission cooling system of claim 1, wherein: The first oil shower ring (301) is provided with a first oil shower hole (307), and the second oil shower ring (302) is provided with a second oil shower hole (308).

5. A dual-motor hybrid transmission cooling system according to claim 4, characterized in that: The first oil shower hole (307) is arranged in a circumferential symmetry on the first oil shower ring (301), and the second oil shower hole (308) is arranged in a circumferential symmetry on the second oil shower ring (302).

6. A dual-motor hybrid transmission cooling system according to claim 1, characterized in that: The oil pump (201) is provided with a first reinforcing rib (103) at the connection with the gearbox housing (1), and the first reinforcing rib (103) is arranged at equal intervals.

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