Multifunctional hub motor test bench

Abstract

The utility model relates to a multifunctional hub motor test bench, belongs to the field of motor testing, and solves the problem that the existing test bench occupies a large area. The test bench comprises a bench device and a test device arranged on the bench device, the test device comprises a wheel hub motor, a belt transmission device and a resistance simulation device, the wheel hub motor and the resistance simulation device are arranged on the same side of the belt transmission device, and the wheel hub motor and the resistance simulation device are adjusted through the belt transmission device. A transmission shaft of the hub motor is parallel to a transmission shaft of the resistance simulation device, the area of the rack is effectively utilized, and the function that a small laboratory can carry out testing is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor test field, especially related to a test bench of in -wheel motor. BACKGROUND

[0002] In -wheel motor and wheel -side motor distributed drive has become the important drive form of electric vehicle, its effective improvement vehicle's controllability and transmission efficiency, improved chassis structure. But because its in thermal stability, vehicle control stability, reliability, research and development cost etc. Technology is not mature, at present, there is no mass production in -wheel motor drive electric vehicle on the market. To solve the above problem needs a large number of tests, and real vehicle test cost is high, not easy to control, test efficiency is low, domestic and foreign scholars use test bench to research, test. However, the scale of the current test bench is still very large, needs in the laboratory with very large area can be carried out, and installation and removal are difficult. UTILITY MODEL CONTENTS

[0003] The utility model provides a multifunctional in -wheel motor test bench, and the volume is small, installation is simple, safety is high and has higher experimental value, overcomes the defect that only in the large laboratory can carry out test.

[0004] A multifunctional in -wheel motor test bench, including test device and rack device that sets up on rack device, the test device includes in -wheel motor, belt drive and resistance simulation device, the in -wheel motor and resistance simulation device set up in the same side of belt drive, and through the adjustment of belt drive, the transmission shaft of in -wheel motor and the transmission shaft of resistance simulation device are parallel to each other.

[0005] Further, the rack device includes support steel sheet and multiple supports that set up on support steel sheet, the long hole is opened on support steel sheet, the support is connected on support steel sheet by bolt through long hole, and the position of support can be adjusted through long hole.

[0006] Further, the belt drive includes pulley A, pulley B and belt that is sleeved on pulley A and pulley B, the test device further includes tensioning device, and the tensioning device is arranged between pulley A and pulley B.

[0007] Further, the tensioning device includes tensioning motor and lead screw, and the lead screw is arranged at the two output ends of tensioning motor.

[0008] Further, the transmission ratio of belt drive is 1:1.

[0009] Further, the resistance simulation device includes flywheel and magnetic powder brake, and the flywheel is connected with magnetic powder brake through shaft coupling C.

[0010] Further, the flywheel is composed of a plurality of flywheel pieces, and the number of the flywheel pieces and the weight of each piece are adjustable.

[0011] Further, the testing device further comprises a pedal A and a pedal B, the pedal A adjusts the driving force of the hub motor, and the pedal B adjusts the braking force of the magnetic powder brake.

[0012] Further, four universal wheels are arranged at four corners below the support steel plate, and the height of the universal wheels is adjustable.

[0013] Further, a bottom support steel frame is further arranged below the support steel plate.

[0014] Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

[0015] (1) The utility model discloses a belt transmission device is arranged between the hub motor and the resistance simulation device, the coaxial condition of traditional hub motor and resistance simulation device is changed, and the two can be converted into the setting of having mutual parallel axis and being located at the same side of the belt transmission device, so that the rack does not need so long to accommodate the whole testing device.

[0016] (2) The combination of the bottom support steel frame and the adjustable height universal wheel arranged below the support steel plate makes the whole rack have the function of short distance movement, and the universal wheel is retracted during the testing process, and the bottom support steel frame can stably support the whole support steel plate and the testing device above.

[0017] (3) The belt tensioning device is arranged between the two belt pulleys of the belt transmission device, which avoids the slipping of the belt and guarantees the transmission efficiency.

[0018] In the utility model, the above-mentioned technical schemes can be combined with each other to realize more optional combination schemes. Other features and advantages of the utility model will be described in the following content, and part of the advantages can become apparent from the description or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the content specially pointed out in the description and the drawings. DRAWINGS:

[0019] Figure 1 It is a three-dimensional structure schematic view of a multifunctional hub motor test bench.

[0020] REFERENCE SIGNS:

[0021] 1 - universal wheel; 2 - support steel plate; 3 - pedal A; 4 - pedal B; 5 - corner sensor; 6 - controller; 7 - bottom support steel frame; 8 - controller support; 9 - hub motor support; 10 - hub motor; 11 - pulley A support; 12 - temperature sensor; 13 - pulley A; 14 - lead screw; 15 - tensioning motor; 16 - belt; 17 - pulley B support; 18 - pulley B; 19 - coupling A; 20 - sensor support; 21 - torque sensor; 22 - coupling B; 23 - flywheel support; 24 - flywheel; 25 - coupling C; 26 - magnetic powder brake; 27 - magnetic powder brake support. DETAILED DESCRIPTION

[0022] The utility model relates to a kind of multifunctional hub motor test bench, including rack device and testing device, the components of testing device are set on rack device, rack device is reformed, it has easy operation performance while guaranteeing supporting function;The components on testing device are reasonably arranged, so that it can complete as many test items as possible while effectively utilizing rack area. The following is explained in conjunction with specific embodiment.

[0023] As shown in Figure 1 Rack device includes support steel plate 2, the lower surface of support steel plate 2 is provided with universal wheel 1, universal wheel 1 has four, respectively set in the four corners of support steel plate 2;The upper surface of support steel plate 2 is provided with a plurality of supports, for supporting the components of testing device, each support is connected with support steel plate 2 by bolt;Long hole is separately provided on the bolt connection part of support steel plate 2, each support can move within the length range of long hole before fixed connection with support steel plate 2, so that installation adjustment degree is reserved for the installation of testing device.

[0024] Rack device is installed with universal wheel 1, so the whole rack device does not need to be simply fixed in a position of laboratory, and short distance movement of rack can be realized according to needs. At the same time because universal wheel 1 has lockable function, four universal wheels 1 are locked before test starts, so that the positioning of the whole rack is realized. Long hole is opened on support steel plate 2, so that independent assembly between each support on support steel plate 2 and the components of testing device can be realized, each support or part of support can be linearly movably connected in each long hole in advance, then the components of testing device are assembled in support respectively to corresponding support, and the distance between each support is flexibly adjusted according to needs, so that the components of testing device are effectively fixed and connected;When disassembling, it is also the same, testing device components do not need to be removed to obtain disassembly space, only need to loosen the connection relationship between corresponding support and support steel plate 2, and disassembly space can be obtained by sliding support on support steel plate 2.

[0025] Further, in order to avoid the problem of instability of the overall gantry caused by the unevenness of the four corners of the universal wheel, the bottom support steel frame 7 is arranged at the position avoiding the universal wheel 1 on the lower surface of the support steel plate 2, and the universal wheel 1 is arranged as a universal wheel with height adjustment function. When moving, the height of the universal wheel 1 is adjusted to be high, so that the bottom support steel frame 7 is lifted off the ground, avoiding the knocking and friction of the bottom support steel frame 7 with the ground during movement; when not moving, the universal wheel 1 is adjusted to be low, and all the universal wheels are retracted, so that the bottom support steel frame 7 completely falls on the ground, avoiding the shaking of the gantry caused by the height error between the universal wheels 1.

[0026] As shown in Figure 1 The test device includes a control part and a device part, the control part transmits preset information to the device part to realize the operation of the device part according to the preset mode, and collects the working parameters of the device part through the feedback signals of the sensors.

[0027] The device part includes a driving part, an adjusting part and a load part, the adjusting part is arranged in a straight line at one end of the gantry, the driving part and the load part are arranged on the same side of the adjusting part, and the transmission axes of the two parts are parallel to each other. The function of the adjusting part is to adjust the axial relationship of the driving part and the load part, that is, to change the continuous transmission along an axis to parallel transmission along two axes, to realize the folding of the transmission path without changing the transmission torque, thereby effectively utilizing the area of the gantry.

[0028] The driving part includes a hub motor 10 for driving the load part, which is also the object to be tested by the test bench. Further, the driving part further includes a pedal A3, which is manually operated to simulate the action of stepping on the accelerator when driving, thereby driving the rotation of the hub motor 10.

[0029] The load part is a resistance simulation device, which is sequentially provided with a shaft coupling A19, a shaft coupling B22, a flywheel 24, a shaft coupling C25 and a magnetic powder brake 26 from the position close to the adjusting part to the position away from the adjusting part.

[0030] The flywheel 24 simulates the rotational inertia of the test target of the automobile. Since the automobile steering is not considered in the test, only the rotational inertia generated in the driving direction of the automobile needs to be considered. According to the different simulation of the rotational inertia of the vehicle, the corresponding rotational inertia can be calculated in advance, and the number of flywheels installed and the weight of each flywheel are adjusted to make the rotational inertia generated by the flywheel 24 in the test consistent with the rotational inertia generated by the test target in the driving of the automobile. Of course, in order to improve the simulation accuracy, the calculation range of the rotational inertia of the automobile can be expanded.

[0031] The magnetic powder brake 26 simulates the braking force of the car, i.e. the working condition of the brake. When braking is not needed, the voltage data of the magnetic powder brake 26 can be zeroed, so that the test device is not affected by the magnetic powder brake 26; when braking is needed, the magnetic powder brake 26 is set to the corresponding voltage according to the braking needs, so as to simulate the braking effect in the test.

[0032] Further, the load part further comprises a pedal B4, which simulates the action of stepping on the brake when driving by manually operating the pedal B4, so as to control the braking degree of the magnetic powder brake 26.

[0033] Each coupling can realize the connection between the shafts of each component in the load device, and in the case of not affecting the driving torque and coaxiality, the components are independent of each other, so as to facilitate the flexible adjustment of the entire load device.

[0034] The adjusting device is an automatic belt tensioning device, as shown in the figure. Figure 1 As shown, the belt tensioning device comprises, from left to right, a pulley A13, a lead screw 14, a tensioning motor 15, a belt 16 and a pulley B17. The belt transmission device composed of the pulley A13, the belt 16 and the pulley B17 is the core of the entire adjusting device. It can receive the rotating torque output by the hub motor 10 through the pulley A13, transmit the rotating torque to the pulley B17 through the operation of the belt transmission device, and then transmit the rotating torque to the driving shaft line of the load device through the connection of the pulley B17 and the load device.

[0035] Further, in order to ensure the effective transmission of the rotating torque in the hub motor 10 by the belt transmission device, the tensioning motor 15 and the two lead screws 14 are arranged between the two pulleys, which can ensure the tensioning force of the belt in the belt device, thereby avoiding the situation of belt slip.

[0036] Further, in order to ensure the effective transmission of the rotating torque while restoring other factors such as the output shaft speed, the transmission ratio of the belt transmission device is set to 1:1, which can effectively restore the output of the hub motor 10.

[0037] The control part comprises a controller 6 and a plurality of sensors. The controller 6 is used to collect the signals transmitted by the sensors, and the signals converted by the individual sensors are transmitted as the preset signals of the test device. Specifically, the sensors include a rotation angle sensor 5, a temperature sensor 12 and a torque sensor 21.

[0038] Torque sensor 21 is arranged between the shaft coupling A 19 and the shaft coupling B 22, for collecting the torque generated by the wheel hub motor 10; the temperature sensor 12 is arranged on the wheel hub motor 10, for collecting the real-time temperature of the wheel hub motor 10 in operation; two angle sensors collect the respective angles of the two pedals A 3 and B 4 respectively, and convert the signals into preset information to control the power of the wheel hub motor 10 and the magnetic powder brake 26 respectively.

[0039] The controller 6 is arranged on the controller support 8, and the controller support 8 is arranged in the blank area of the parallel shafts of the driving device and the load device, and the pedals A 3 and B 4 are fixed outside the controller support 8 through bolts, and the angle sensor 5 is installed on the upper end of the pedal.

[0040] In addition to the controller 6 arranged on the controller support 8, the components of the test device are also arranged on the corresponding supports. The wheel hub motor 10 is arranged on the wheel hub motor support 9, the pulley A 13 is arranged on the pulley A support 11, the pulley B 18 is arranged on the pulley B support 17, the torque sensor 21 is arranged on the sensor support 20, the flywheel 24 is arranged on the flywheel support 23, and the magnetic powder brake 26 is arranged on the magnetic powder brake support 27.

[0041] The utility model can test the characteristics such as wheel hub motor braking, driving and efficiency, simulate vehicle test of automobile resistance and rotational inertia, and test motor temperature control under different loads.

[0042] The working principle of the whole test bench will be described in combination with specific data as follows:

[0043] Connect 12V, 72V and 220V power supply to the controller 6, the controller 6 provides 72V three-phase voltage to the wheel hub motor 10, 220V voltage to the magnetic powder brake 26, 12V direct current voltage to the tensioning motor 15, and 5V voltage to each sensor. The controller 6 transmits information with each sensor and motor by CAN message. The torque sensor 21 collects the torque generated by the wheel hub motor 10, the temperature sensor 12 collects the real-time temperature of the wheel hub motor 10 in operation, and the angle sensor 5 collects the respective angles of the two pedals and sends the signals to the total controller module in real time.

[0044] After starting the power supply, the magnetic powder brake 26, the wheel hub motor 10 and the tensioning motor 15 are all in power-off state, and the controller 6 controls their opening and closing and torque size respectively. The tensioning motor 15 is powered on, the tensioning torque is preset by the controller, the servo motor pushes the two screw rods 14, and then pushes the two pulley supports (11, 17) to a reasonable position, and then completely fixes the support position to ensure the safety of the test.

[0045] The hub motor 10 is powered on, and small torque can be taken first to ensure that the whole system is error-free before increasing the torque. The controller 6 corresponds the pedal A3 rotation angle to the hub motor 10 torque, and when the pedal rotation angle increases, the hub motor 10 torque increases; the pedal B4 rotation angle corresponds to the magnetic powder brake 26 braking force, and when the pedal rotation angle increases, the magnetic powder brake 26 braking force increases. The flywheel device simulates the rotational inertia of the automobile, and since the automobile turning is not considered in the experiment, only the rotational inertia generated in the automobile driving direction needs to be considered. In this example, a commercial vehicle JIEFANG 151K is selected as a model, and the rotational inertia thereof is approximately 1.18 kg·m 2 , so the rotational inertia corresponding to the flywheel 24 simulation test target is selected. When the hub motor 10 is accelerated, braked, and idled, the values of each sensor need to be observed and recorded in real time to perform the required test.

[0046] At the end of the test, the controller 6 stops supplying power to the hub motor 10, the magnetic powder brake 26, the tensioning motor 15, and each sensor, saves and organizes the test data, and then turns off the power.

[0047] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A multifunctional hub motor test bench, characterized in that: The invention comprises a bench device and a test device arranged on the bench device, wherein the test device comprises a hub motor (10), a belt transmission device and a resistance simulation device, wherein the hub motor (10) and the resistance simulation device are arranged on the same side of the belt transmission device, and through adjustment of the belt transmission device, the transmission shaft of the hub motor (10) and the transmission shaft of the resistance simulation device are parallel to each other.

2. The multifunctional hub motor test bench according to claim 1, characterized in that: The platform device comprises a supporting steel plate (2) and a plurality of brackets arranged on the supporting steel plate (2); a long hole is opened on the supporting steel plate (2); the supporting steel plate (2) is connected to the bracket by bolts passing through the long hole, and the position of the supporting steel plate (2) can be adjusted through the long hole.

3. The multifunctional hub motor test bench according to claim 2, characterized in that: The belt transmission device includes a pulley A (13), a pulley B (18) and a belt (16) sleeved on the pulley A (13) and the pulley B (18); the testing device also includes a tensioning device, which is arranged between the pulley A (13) and the pulley B (18).

4. The multifunctional hub motor test bench according to claim 3, characterized in that: The tensioning device comprises a tensioning motor (15) and a lead screw (14), wherein the lead screw (14) is arranged at two output ends of the tensioning motor (15).

5. The multifunctional hub motor test bench according to claim 4, characterized in that: The transmission ratio of the belt drive is 1:

1.

6. The multifunctional hub motor test bench according to claim 5, characterized in that: The resistance simulation device comprises a flywheel (24) and a magnetic powder brake (26), and the flywheel (24) and the magnetic powder brake (26) are connected via a coupling C (25).

7. The multifunctional hub motor test bench according to claim 6, characterized in that: The flywheel (24) is composed of a plurality of flywheel plates, and the number of the flywheel plates and the weight of each plate are adjustable.

8. The multifunctional hub motor test bench according to claim 7, characterized in that: The testing device further comprises a pedal A (3) and a pedal B (4), wherein the pedal A (3) adjusts the driving force of the hub motor (10), and the pedal B (4) adjusts the braking force of the magnetic powder brake (26).

9. The multifunctional hub motor test bench according to claim 8, characterized in that: Four universal wheels (1) are provided at the four corners under the supporting steel plate (2), and the universal wheels (1) are height-adjustable.

10. The multifunctional hub motor test bench according to claim 9, characterized in that: A bottom supporting steel frame (7) is also provided under the supporting steel plate (2).

Images