Four-shaft rack for testing longitudinally-arranged hybrid gearbox of hybrid power system automobile

Abstract

The utility model relates to a four-shaft rack for testing a longitudinally-arranged hybrid gearbox of a hybrid power system automobile, which can be arranged on the basis of a three-shaft electric drive assembly test room, namely, a 250kW high-speed input motor is additionally arranged outside an original input motor, two output motors and temperature control equipment on a T-shaped iron flat plate, and a three-shaft electric drive assembly is arranged on the other end of the three-shaft electric drive assembly test room. Therefore, the power input of the engine and the driving motor can be simulated on the same rack. Therefore, when the gearbox needs to be tested independently in the early development stage, the dynamic coupling state of the motor and the engine of the hybrid gearbox can be simulated by utilizing the three-shaft rack, and the structural design and the working efficiency of the gearbox can be verified.

Description

TECHNICAL FIELD

[0001] The utility model relates to a test bench for automobile gearbox, specifically, the utility model relates to a four-axle test bench for longitudinal hybrid power system automobile longitudinal hybrid gearbox test. BACKGROUND

[0002] At present, the powertrain of the new energy automobile market is mainly divided into two structures of pure electric and hybrid power. With the rapid development of the new energy automobile industry, in addition to the rapid progress of electric vehicle technology, hybrid power technology is gradually valued and favored by more manufacturers, and evolves from a transitional stage to an important part of the new energy market, and the related research and development demand also rapidly grows.

[0003] Due to the multiple technical routes of the hybrid power system, the power output system includes series, parallel and various hybrid structures, and the power output strategy of the engine and the motor is complex, therefore, higher requirements are put forward for the structural design of the gearbox, and the design scheme of the gearbox needs to be verified early through the test bench.

[0004] Among them, the longitudinal hybrid gearbox has larger overall arrangement space, greater torque bearing capacity and better heat dissipation efficiency, and therefore is welcomed by SUV and high-end markets.

[0005] The longitudinal gearbox refers to the gearbox perpendicular to the front axle of the automobile, and the gearbox is longitudinally placed behind the engine. This layout makes the power output direction parallel to the automobile running direction, and the power is longitudinally transmitted to the transmission shaft through the gearbox. The longitudinal gearbox is usually used in large displacement vehicles. The application of the longitudinal gearbox makes the front and rear weights of the vehicle more balanced, which is beneficial to reducing energy consumption, and is commonly used in rear-wheel drive vehicles.

[0006] At present, the longitudinal gearbox verification test is usually carried out on a three-motor test bench, but the three-motor test bench can only verify a single power source of the gearbox assembly, such as engine output power or motor output power, to verify the transmission of different power sources, and cannot verify the gearbox working mode of engine and driving motor driving together or engine driving generator.

[0007] The existing gearbox test room is equipped with two high-power output motors and one medium-speed input motor. Through software self-definition, the input motor is used to simulate the engine to provide torque input, and the two output motors are used to control the speed to simulate the two sides of the wheel end, forming an input and output gearbox test room.

[0008] Power transmission direction: the input motor provides power torque, and then the gearbox and the reducer are used, and the two output motors are used to control the speed as the load.

[0009] However, the three-axle gearbox test bench has the following disadvantages:

[0010] With the existing triaxial test system, only the simulation test of the hybrid electric drive assembly can be met. When the transmission needs to be tested alone, the existing triaxial bench cannot simulate the driving motor and engine power coupling state of the hybrid transmission, and cannot verify the transmission structure design and working efficiency.

[0011] The final purpose of the utility model is to analyze the gear and bearing structure design of the transmission, and the transmission efficiency, drag torque and vibration order of the transmission. Utility model content

[0012] In order to overcome the above problems, the utility model aims at providing a four-axis bench for hybrid power system automobile longitudinal hybrid transmission test,

[0013] The four-axis bench for hybrid power system automobile longitudinal hybrid transmission test can be set on the basis of a triaxial electric drive assembly test room, that is,

[0014] In addition to the original one input motor and two output motors on the T-shaped iron plate, a 250kW high-speed input motor is arranged, and the high-speed input motor is connected to the motor input end of the transmission through a shaft coupling and a spline shaft, so as to realize the power input of the engine and the driving motor on the same bench.

[0015] Therefore, when the transmission needs to be tested alone in the early development stage, the triaxial bench can simulate the motor and engine power coupling state of the hybrid transmission, and can verify the transmission structure design and working efficiency in the early stage.

[0016] The technical scheme of the utility model is as follows:

[0017] A four-axis bench for hybrid power system automobile longitudinal hybrid transmission test, characterized in that,

[0018] The four-axis bench for hybrid power system automobile longitudinal hybrid transmission test can be set on the basis of a triaxial electric drive assembly test room, that is,

[0019] In addition to the original one input motor and two output motors on the T-shaped iron plate, a 250kW high-speed input motor is arranged, and the high-speed input motor is connected to the motor input end of the transmission through a shaft coupling and a spline shaft, so as to realize the power input of the engine and the driving motor on the same bench.

[0020] Therefore, when the transmission needs to be tested alone in the early development stage, the triaxial bench can simulate the motor and engine power coupling state of the hybrid transmission, and can verify the transmission structure design and working efficiency.

[0021] The utility model discloses a hybrid power system automobile longitudinal mixed motion gearbox test four axle test bench, its characterized in that,

[0022] High speed input motor maximum speed: 18000r / min~20000r / min.

[0023] The utility model discloses a hybrid power system automobile gearbox test four axle test bench, its characterized in that,

[0024] The front end of the gearbox prototype is arranged with a medium speed motor on the iron flat plate in the laboratory, the medium speed motor rotates at 7000r / min~8000r / min, and the medium speed motor is connected to the engine input end of the gearbox through a transmission shaft to simulate the engine input.

[0025] The utility model discloses a hybrid power system automobile gearbox test four axle test bench, its characterized in that,

[0026] Two output motors are connected to two output ends of the gearbox through half shafts.

[0027] The utility model discloses a hybrid power system automobile gearbox test four axle test bench, its characterized in that,

[0028] The two output motors are large torque output motors, and the maximum torque of the output motor is 3000Nm~3600Nm.

[0029] The utility model discloses a hybrid power system automobile gearbox test four axle test bench, its characterized in that,

[0030] The input motors are torque modes, can also be changed into torque mode / speed mode according to test demand, and the two motors are independently controllable.

[0031] Therefore, the demand of various function tests of the longitudinal mixed motion gearbox is met, that is, after arranging the high speed input motor, the test ability of the electric drive route, series route, parallel route and power generation route is increased on the basis of the original engine route test ability.

[0032] The utility model discloses a hybrid power system automobile longitudinal mixed motion gearbox test four axle test bench, its characterized in that,

[0033] Without changing the test bench arrangement structure, the input shafts of the medium speed motor and the high speed input motor have the same coaxial degree with the prototype.

[0034] The utility model discloses a hybrid power system automobile longitudinal mixed motion gearbox test four axle test bench, its characterized in that,

[0035] The high speed input motor has the coaxial degree precision requirement with the input shaft of the prototype, and the coaxial degree precision requirement is 0.03mm.

[0036] The four-axle bench for longitudinal hybrid power system automobile gearbox test is characterized in that,

[0037] The four-axle bench for gearbox test is provided with motor control, and according to the specific positions of the gearbox driving motor and the generator, the high-speed driving motor height is adjusted to achieve the high-speed input motor access to the driving motor end or the generator input end.

[0038] Therefore, engine single driving, motor single driving, engine and driving motor common driving, engine driving generator power generation and other working conditions can be realized respectively. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 The four-axle bench for gearbox test is provided with motor control, and according to the specific positions of the gearbox driving motor and the generator, the high-speed driving motor height is adjusted to achieve the high-speed input motor access to the driving motor end or the generator input end.

[0040] Figure 2 It is a series / parallel mode driving diagram;

[0041] Figure 3 It is a direct drive mode driving diagram;

[0042] Figure 4 It is an electric drive mode driving diagram;

[0043] Figure 5 It is a direct drive mode driving diagram.

[0044] Figure 6 It is a four-axle bench for longitudinal hybrid power system automobile gearbox test according to the utility model.

[0045] Figure 7 It is a four-axle bench for longitudinal hybrid power system automobile gearbox test according to the utility model.

[0046] In the figure, 1 is an output motor, 2 is an input motor (medium speed), 3 is a measured sample machine, 4 is an iron plate, and 5 is a high-speed input motor. DETAILED DESCRIPTION

[0047] Embodiment

[0048] A four-axle bench for longitudinal hybrid power system automobile gearbox test utilizes an original input motor and two output motors of a three-axle electric drive assembly test room, and a 250kW (maximum speed 20000rpm) high-speed input motor is added to realize the power input of the engine and the driving motor on the same bench.

[0049] Thus, when the gearbox needs to be tested separately in the early development stage, the three-axis bench can simulate the motor and engine power coupling state of the hybrid gearbox, and the gearbox structure design and working efficiency can be verified in the early stage.

[0050] According to the four-axis bench for testing the longitudinal hybrid gearbox of the hybrid power system automobile, a medium-speed motor is arranged at the front end of the gearbox prototype on the iron flat plate in the test room, an engine input is simulated, and two large-torque output motors are arranged at the two sides of the gearbox prototype.

[0051] A high-speed input motor is arranged at the rear end of the gearbox prototype and connected to the input end of the driving motor, corresponding to the electric drive mode and the parallel mode, or the high-speed input motor is connected to the input end of the generator, corresponding to the power generation mode and the direct drive power generation mode, so that the needs of various function tests of the longitudinal hybrid gearbox are met.

[0052] In the embodiment, the four-axis bench utilizes the space of the T-shaped iron flat plate and reduces the vibration of the bench through tooling design.

[0053] In the embodiment, without changing the arrangement structure of the bench, the input shafts of the medium-speed motor and the high-speed input motor have the same good coaxiality as the prototype.

[0054] In the embodiment, the four-axis bench for testing the gearbox is implemented by motor control, the motor control mode can be self-defined, and various control mode working conditions such as the electric drive mode, the direct drive mode and the parallel mode are respectively completed without changing the arrangement of the bench.

[0055] In the embodiment, the two input motors of the test room can be torque mode, or can be changed to torque mode / speed mode according to the test needs, and the two motors are independently controllable.

[0056] According to the four-axis bench for testing the longitudinal hybrid gearbox of the hybrid power system automobile, in the complete process of verifying the gearbox structure design and working efficiency,

[0057] Firstly, the medium-speed motor is connected to the engine input end of the gearbox through a transmission shaft, the high-speed input motor is connected to the driving motor input end or the generator input end of the gearbox through a shaft coupling and a spline shaft, and the accuracy is 0.03mm. Secondly, the two output motors are connected to the two output ends of the gearbox through half shafts. In addition to the original one input motor and two output motors and the temperature control equipment on the T-shaped iron flat plate, a 250kW high-speed input motor is added to simulate the power input of the engine and the driving motor on the same bench.

[0058] Thus, when the gearbox needs to be tested separately in the early development stage, the three-axis bench can simulate the motor and engine power coupling state of the hybrid gearbox, and the gearbox structure design and working efficiency can be verified

[0059] According to the application, the original triaxial laboratory equipment is fully utilized, the original test capacity of the laboratory is retained, the test equipment upgrading cost is low, and the test requirements of the hybrid variable speed gearbox are met; after the high-speed input motor is added, the test requirements of various power routes of the longitudinal variable speed gearbox can be fully met, the test capacity of the electric drive route, the series route, the parallel route and the power generation route is increased on the basis of the original engine route test capacity; the software control self-definition can be standardized, the triaxial laboratory can be standardized and upgraded in batches, the laboratory can be flexibly upgraded according to the test quantity of the longitudinal variable speed gearbox, and more test requirements of the longitudinal hybrid variable speed gearbox can be met. A medium-speed motor is arranged at the front end of the sample machine on the laboratory iron flat plate to simulate the engine input, a high-speed input motor is arranged at the rear end of the variable speed gearbox sample machine to simulate the driving motor input or the generator input, and two large-torque output motors are arranged on both sides of the sample machine to realize various working modes of the longitudinal variable speed gearbox sample machine and meet the test requirements of various functions of the longitudinal hybrid variable speed gearbox.

Claims

1. A four-axle test bench for testing a longitudinal hybrid transmission of a hybrid vehicle, characterized in that The hybrid system automobile longitudinal hybrid transmission test four axle test bench can be set up on the basis of three axle electric drive assembly test room, namely, In addition to the original one input motor and two output motors on the T-shaped iron flat plate, a 250kW high-speed input motor is arranged, which is connected to the motor input end of the transmission through a shaft coupling and a spline shaft, so as to realize the power input of the engine and the driving motor on the same test bench.

2. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, The maximum speed of the high-speed input motor is 18000r / min-20000r / min.

3. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, A medium-speed motor is arranged at the front end of the transmission sample on the test room iron flat plate, the speed of the medium-speed motor is 7000r / min-8000r / min, and the medium-speed motor is connected to the engine input end of the transmission through a transmission shaft to simulate the engine input.

4. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, The two output motors are connected to the two output ends of the transmission through half shafts.

5. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1 or 4, wherein, The two output motors are large torque output motors, and the maximum torque of the output motor is 3000Nm-3600Nm.

6. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, The input motors are torque mode, or are changed to torque mode / speed mode according to test requirements, and both motors are independently controllable.

7. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, Without changing the arrangement structure of the test bench, the input shafts of the medium-speed motor and the high-speed input motor have the same coaxiality as the sample.

8. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 5, wherein, The coaxiality precision requirement of the high-speed input motor with the input shaft of the sample is 0.03mm.

9. The hybrid system automobile longitudinal hybrid transmission test four axle test bench of claim 1, wherein, The four axle test bench for transmission test is provided with motor control, and according to the specific position of the transmission driving motor and the generator, the height of the high-speed driving motor is adjusted to achieve the connection of the high-speed input motor to the driving motor end or the generator input end.

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