New energy automobile load rotating speed testing device

Abstract

The application discloses a new energy automobile load rotating speed testing device, which comprises a testing plate and an engine body, an axle is installed at the end of the engine body, an environmental control mechanism and a rotating speed sensor for monitoring the rotating speed of the axle are installed at the outer side of the engine body, an inner wall of the testing plate is installed with a carrier driven by a driving screw rod, an inner part of the carrier is installed with a pitch adjusting module, two symmetrically arranged brake modules are in transmission connection with the circumferential surface of the pitch adjusting module, an outer sleeve is in rotary connection with the inner wall of the carrier, a brake disc matched with the brake module is fixedly installed on the circumferential surface of the outer sleeve, and an eccentric weight assembly is installed at the tail of the outer sleeve. The application has the constant temperature and constant power testing mode, the constant power and variable temperature testing mode, the variable power and constant temperature testing mode and the variable power and variable temperature testing mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a load speed testing device for new energy vehicles. BACKGROUND

[0002] The existing load speed testing device for new energy vehicles is usually fixedly connected with the driving shaft of the vehicle motor for testing, which is relatively cumbersome and affects the testing efficiency of the vehicle motor. Moreover, it has high use limitations and can only test single type of vehicle motor, which is difficult to meet the testing needs of different types of vehicle motors

[0003] To solve the problems in the background art, the patent document with publication number CN115307937B discloses a load speed testing device for new energy vehicles. The device connects the connecting head and the movable shaft together through clamping, which makes the connecting head easier to disassemble and assemble, so as to replace the connecting head according to the type of vehicle motor to be tested, and better meet the testing needs of different types of vehicle motors. When the connecting head and the movable shaft are clamped together, the hollow movable block is in contact with the inner side of the four clamping hooks under the influence of the spring A thrust, preventing the clamping hooks from bending inward and ensuring the firmness of the connection between the connecting head and the movable shaft. However, the device has single testing mode and function when testing the load speed of the vehicle. Therefore, the present application provides a load speed testing device for new energy vehicles to solve the problems in the background art. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the prior art, the present application aims to provide a load speed testing device for new energy vehicles. The device has constant temperature and constant power testing mode, constant power and variable temperature testing mode, variable power and constant temperature testing mode, and variable power and variable temperature testing mode.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme, the technical scheme is: respectively including test plate and engine body, the end of the engine body is provided with an axle, the outer side of the engine body is respectively provided with an environmental control mechanism and a rotating speed sensor for monitoring the rotating speed of the axle, the inner wall of the test plate is provided with a carrier driven by a driving screw rod, the inside of the carrier is provided with a distance adjusting module, the peripheral side surface of the distance adjusting module is drivingly connected with two symmetrically arranged brake modules, the inner wall of the carrier is rotatably connected with an outer sleeve, the peripheral side surface of the outer sleeve is fixedly provided with a brake disc matched with the brake module, the tail of the outer sleeve is provided with an eccentric weight assembly, the tail of the carrier is fixedly provided with a distance measuring probe coaxially arranged with the outer sleeve, the inner wall of the outer sleeve is slidingly connected and drivingly matched with an inner shaft tube, the end of the inner shaft tube is provided with a clamping assembly for clamping the axle, the surface of the test plate is fixedly provided with an axial load assembly matched with the axle.

[0008] As a preferred scheme, the distance adjusting module comprises an adjusting motor fixed to the top surface of the carrier and a distance adjusting screw rod rotatably connected between the inner surface of the carrier, the output shaft end of the adjusting motor is fixedly connected with the distance adjusting screw rod, the axis of the distance adjusting screw rod is perpendicular to the axis of the inner shaft tube, the peripheral side surface of the distance adjusting screw rod is symmetrically provided with a forward thread part and a reverse thread part, and the peripheral side surfaces of the forward thread part and the reverse thread part are respectively drivingly connected with the two brake modules.

[0009] As a preferred scheme, the brake module comprises a pressing clamp, the peripheral side surface of the pressing clamp is slidingly connected with the carrier, the inner wall of the pressing clamp is drivingly connected with the distance adjusting screw rod, the bottom surface of the pressing clamp is slidingly connected with a brake arc block matched with the brake disc, and a group of pressure sensors a are arranged between the opposite surfaces of the pressing clamp and the brake arc block.

[0010] As a preferred scheme, the environmental control mechanism comprises an environmental box sleeved on the outer side of the engine body, a single-chip microcomputer and a monitoring host connected with the engine body in data are fixedly arranged on the surface of the environmental box, the port of the single-chip microcomputer is electrically connected with a temperature probe, the port of the distance measuring probe is electrically connected with the single-chip microcomputer, the bottom of the environmental box is fixedly and communicatively provided with a ventilation pipe, the inner wall of the ventilation pipe is sequentially fixedly provided from top to bottom with an electric heating wire and an axial flow fan, and the inside of the ventilation pipe is provided with a group of regularly distributed semiconductor refrigerating fins.

[0011] As a preferred scheme, the outer sleeve and the inner shaft tube are both hollow tubular structures with open ends, and the cross sections of the outer sleeve and the inner shaft tube are regular polygons.

[0012] As a preferred scheme, the eccentric weight assembly comprises a weight frame fixed to the lateral surface of the outer sleeve, a plurality of weight guide grooves in a circumferential array are arranged in the weight frame, a position adjusting screw is rotatably connected between the inner surface of the weight frame and the position corresponding to the inner part of each weight guide groove, a weight seat driven by the position adjusting screw is slidably connected to the inner wall of the weight guide groove, a plurality of positioning rods are fixedly arranged on the top surface of the weight seat, a plurality of weight counterweights are sleeved on the lateral surface of each positioning rod, a locking nut for limiting the position of the weight counterweight is threadedly connected to the lateral surface of the positioning rod, and a scale mark is arranged on the surface of the weight frame and adjacent to the position of each weight guide groove.

[0013] As a preferred scheme, the axes of the position adjusting screw and the positioning rod are perpendicular to the axis of the outer sleeve, and a handle is fixedly arranged on the end of the position adjusting screw.

[0014] As a preferred scheme, the clamping assembly comprises two symmetrical half-arc pipe clamps fixed to the end of the inner shaft tube, a support plate rotatably connected to the lateral surface of the inner shaft tube and connected with the axial load assembly, a clamping screw horizontally arranged and rotatably connected to the inner wall of the support plate, a clamping ring slidably connected to the lateral surface of the inner shaft tube, and a pressing plate rotatably connected to the lateral surface of the clamping ring, and the lateral surface of the clamping screw is in transmission connection with the pressing plate.

[0015] As a preferred scheme, the outer side of the half-arc pipe clamp is fixedly provided with a guide ring surface matched with the clamping ring, the whole arc of the half-arc pipe clamp is 150°, and the inner wall of the half-arc pipe clamp is uniformly provided with friction lines.

[0016] As a preferred scheme, the axial load assembly comprises a pressure providing seat slidably connected with the test plate and a plurality of pressure providing push rods, the movable end of the pressure providing push rod is fixedly connected with the pressure providing seat, a plurality of guide rods slidably connected with the support plate are arranged on the end surface of the pressure providing seat, a pressure sensor b is arranged between the opposite surfaces of the pressure providing seat and the support plate, the cross section of the guide rod is T-shaped, and the axes of the guide rod and the pressure providing push rod are parallel to the axis of the inner shaft tube.

[0017] (Three) beneficial effects

[0018] Compared with the prior art, the new energy automobile load speed test device has the following beneficial effects:

[0019] The eccentric weight assembly, the environmental control mechanism, the axial load assembly and the brake module are arranged, so that the device can efficiently complete the speed test of the new energy vehicle load, and the device has the constant temperature and constant power test mode, the constant power and variable temperature test mode, the variable power and constant temperature test mode and the variable power and variable temperature test mode during the test operation, and the device can realize the longitudinal load test item test, the eccentric load test item test and the axial load test item test in each mode, so that the functionality of the device is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the new energy vehicle load speed test device of the application.

[0021] Figure 2 It is a structure schematic view of the new energy vehicle load speed test device of the application. Figure 1

[0022] Figure 3 It is a structure schematic view of the new energy vehicle load speed test device of the application. Figure 1

[0023] Figure 4 It is a structure schematic view of the new energy vehicle load speed test device of the application. Figure 3

[0024] Figure 5 It is a front view structure schematic view of the new energy vehicle load speed test device of the application. Figure 3

[0025] Figure 6 It is a front view structure schematic view of the new energy vehicle load speed test device of the application. Figure 5

[0026] Figure 7 It is a cross-sectional structure schematic view of the sleeve pipe and the inner shaft pipe of the application.

[0027] Figure 8 It is a structure schematic view of the carrier and the distance adjusting module of the application.

[0028] Figure 9 It is a structure schematic view of the new energy vehicle load speed test device of the application. Figure 8

[0029] ​​​​​​In the figure: 1, test board; 2, engine body; 3, wheel shaft; 4, rotating speed sensor; 5, driving screw rod; 6, carrier frame; 7, distance adjusting module; 8, outer sleeve tube; 9, brake disc; 10, distance measuring probe; 11, inner shaft tube; 12, pressing clamp; 13, brake arc block; 14, pressure sensor a; 15, environmental box; 16, single-chip microcomputer; 17, monitoring host computer; 18, ventilation pipe; 19, counterweight frame; 20, counterweight guide groove; 21, position adjusting screw rod; 22, counterweight seat; 23, positioning rod; 24, counterweight weight; 25, locking nut; 26, pressure providing seat; 27, pressure providing push rod; 28, guide rod; 29, pressure sensor b; 30, half-arc pipe clamp; 31, support plate; 32, pressure applying plate; 33, clamping screw rod; 34, clamping ring. Embodiment

[0030] The application will be further described and illustrated in connection with specific embodiments and the accompanying drawings of the specification:

[0031] Please refer to Figures 1-9 The application: a new energy automobile load rotating speed testing device, the technical scheme adopted is: respectively comprising a test board 1 and an engine body 2, the end of the engine body 2 is provided with a wheel shaft 3;

[0032] The engine body 2 comprises a motor driven by new energy, and the output shaft end of the motor is fixedly connected with the wheel shaft 3 through a gearbox;

[0033] The outer side of the engine body 2 is respectively provided with an environmental control mechanism and a rotating speed sensor 4 for monitoring the rotating speed of the wheel shaft 3;

[0034] The environmental control mechanism comprises an environmental box 15 sleeved on the outer side of the engine body 2, the surface of the environmental box 15 is respectively fixedly provided with a single-chip microcomputer 16 and a monitoring host computer 17 in data connection with the engine body 2, the port of the single-chip microcomputer 16 is electrically connected with a temperature probe, the bottom of the environmental box 15 is fixedly communicated with a ventilation pipe 18, the inner wall of the ventilation pipe 18 is sequentially fixedly provided from top to bottom with an electric heating wire and an axial flow fan, and a group of regularly distributed semiconductor refrigerating pieces are arranged in the inside of the ventilation pipe 18;

[0035] The semiconductor refrigerating pieces are used for realizing refrigeration operation in the inside of the environmental box 15, and when the semiconductor refrigerating pieces work, the axial flow fan blows air into the inside of the environmental box 15;

[0036] The electric heating wire cooperates with the axial flow fan to realize hot air supply into the inside of the environmental box 15;

[0037] The monitoring host computer 17 comprises a PC and an encoder arranged in the motor, the data end of the PC is in data connection with the motor through a dynamic power load monitor, and the encoder is used for controlling the rotating speed in the motor testing mode and the working mode;

[0038] The dynamic power load monitor is used for monitoring the power of the motor, the current input value of the motor and the voltage input value of the motor in real time, and feeds back the detected real-time signals to the PC, and the PC displays the data signals of the dynamic power load monitor in real time;

[0039] The single-chip microcomputer 16 is used for receiving the data feedback of the temperature probe and the ranging probe 10 in real time, and feeds back the received real-time signals to the monitoring host computer 17;

[0040] The temperature probe is used for monitoring the temperature data of the environment box 15 and the motor in real time;

[0041] The models of the single-chip microcomputer 16, the encoder, the dynamic power load monitor, the ranging probe 10 and the temperature probe can be customized according to actual requirements;

[0042] The inner wall of the test board 1 is provided with a carrier 6 driven by a driving screw 5, and the driving screw 5 is arranged to quickly adjust the layout position of the carrier 6;

[0043] The inside of the carrier 6 is provided with a distance adjusting module 7, and the circumferential side of the distance adjusting module 7 is drivingly connected with two symmetrical brake modules;

[0044] The distance adjusting module 7 comprises an adjusting motor fixed to the top surface of the carrier 6 and a distance adjusting screw rotatably connected between the carrier 6 and the inner surface of the carrier 6, the output shaft end of the adjusting motor is fixedly connected with the distance adjusting screw, the axis of the distance adjusting screw is perpendicular to the axis of the inner shaft tube 11, the circumferential side of the distance adjusting screw is symmetrically provided with a forward thread part and a reverse thread part, and the circumferential sides of the forward thread part and the reverse thread part are respectively drivingly connected with the two brake modules;

[0045] The arrangement of the forward thread part and the reverse thread part enables the two brake modules to be synchronously close to or away from each other, the mutual close or away of the two brake modules quickly changes the distance between the two brake modules, and the adjustment of the distance between the two brake modules adjusts the load degree of the brake module to the wheel shaft 3;

[0046] The inner wall of the carrier 6 is rotatably connected with an outer sleeve 8, and the circumferential side of the outer sleeve 8 is fixedly provided with a brake disc 9 matched with the brake module;

[0047] The brake module comprises a pressing clamp 12, the circumferential side of the pressing clamp 12 is slidingly connected with the carrier 6, the inner wall of the pressing clamp 12 is drivingly connected with the distance adjusting screw, the bottom surface of the pressing clamp 12 is slidingly connected with a brake arc block 13 matched with the brake disc 9, a group of pressure sensors a 14 are arranged between the opposite surfaces of the pressing clamp 12 and the brake arc block 13, the arrangement of the pressure sensors enables the brake pressure of the brake arc block 13 to the brake disc 9 to be accurately adjusted, and the pressure sensors a 14 feed back the monitored real-time signals to the single-chip microcomputer 16 when working.

[0048] The tail of the outer sleeve 8 is provided with an eccentric weight assembly;

[0049] The eccentric weight assembly comprises a weight frame 19 fixed to the lateral surface of the outer sleeve 8, a group of weight guide grooves 20 in a circumferential array is arranged in the inner part of the weight frame 19, a positioning screw 21 is rotationally connected between the inner surface of the weight frame 19 and the position corresponding to the inner part of each weight guide groove 20, a weight seat 22 driven by the positioning screw 21 is slidingly connected to the inner wall of the weight guide groove 20, a group of positioning rods 23 is fixedly installed on the top surface of the weight seat 22, a group of weight counterweights 24 is sleeved on the lateral surface of each positioning rod 23, a locking nut 25 for limiting the position of the weight counterweight 24 is threadedly connected to the lateral surface of the positioning rod 23, and a scale mark is arranged on the surface of the weight frame 19 and adjacent to the position of each weight guide groove 20;

[0050] The axes of the positioning screw 21 and the positioning rod 23 are perpendicular to the axis of the outer sleeve 8, and a handle is fixedly installed on the end of the positioning screw 21;

[0051] In use, the eccentric load degree of the eccentric weight assembly in a specified direction can be adjusted by adjusting the position of the weight seat 22 and controlling the number of weight counterweights 24;

[0052] Through the adjustment of the eccentric load degree in each direction, the eccentric load test of the engine body 2 during operation can be realized;

[0053] The tail of the carrier 6 is fixedly installed with a distance measuring probe 10 coaxially arranged with the outer sleeve 8, and the port of the distance measuring probe 10 is electrically connected with the single-chip microcomputer 16;

[0054] The distance measuring probe 10 is used for real-time monitoring of the distance between the tail end of the outer sleeve 8 and the wheel shaft 3, and the distance measuring probe 10 feeds back the monitored real-time data to the single-chip microcomputer 16 during operation;

[0055] The inner wall of the outer sleeve 8 is slidingly connected and transmissionally matched with an inner shaft tube 11, both the outer sleeve 8 and the inner shaft tube 11 are hollow tubular structures with open ends, and the cross sections of the outer sleeve 8 and the inner shaft tube 11 are regular polygons;

[0056] The cross sections of the outer sleeve 8 and the inner shaft tube 11 are arranged to ensure that the outer sleeve 8 and the inner shaft tube 11 can be slidingly connected and transmissionally matched;

[0057] The end of the inner shaft tube 11 is provided with a clamping assembly for clamping the wheel shaft 3, and the surface of the test plate 1 is fixedly installed with an axial load assembly matched with the wheel shaft 3.

[0058] The clamping assembly respectively comprises two symmetrical half-arc clamping pipes 30 fixed to the end of the inner shaft pipe 11, a support plate 31 rotatably connected to the lateral surface of the inner shaft pipe 11 and connected with the axial load assembly, a clamping screw rod 33 horizontally arranged and rotatably connected to the inner wall of the support plate 31, a clamping ring 34 slidably connected to the lateral surface of the inner shaft pipe 11 and a pressing plate 32 rotatably connected to the lateral surface of the clamping ring 34, the lateral surface of the clamping screw rod 33 is drivingly connected with the pressing plate 32, the outer side of the half-arc clamping pipe 30 is fixedly provided with a guide ring surface matched with the clamping ring 34, the whole arc of the half-arc clamping pipe 30 is 150°, and the inner wall of the half-arc clamping pipe 30 is uniformly provided with friction lines.

[0059] The axial load assembly respectively comprises a pressure seat 26 slidably connected with the test plate 1 and a group of pressure pushing rods 27, the active end of the pressure pushing rod 27 is fixedly connected with the pressure seat 26, the end surface of the pressure seat 26 is provided with a group of guide rods 28 slidably connected with the support plate 31, a pressure sensor b29 is arranged between the opposite surfaces of the pressure seat 26 and the support plate 31, the cross section of the guide rod 28 is T-shaped, and the axes of the guide rod 28 and the pressure pushing rod 27 are parallel to the axis of the inner shaft pipe 11.

[0060] The working principle of the present application is that the present application is mainly suitable for the rotation speed test operation of the engine body 2 under different loads, and a plurality of measurement modes are provided in the device during the test.

[0061] Before measurement, the two half-arc clamping pipes 30 sufficiently clamp the wheel shaft;

[0062] The first measurement mode is a constant temperature and constant power test mode, in which the internal environment of the engine body 2 is kept constant by the environmental box 15, and the input power of the engine body 2 is kept constant, and a plurality of test operations are carried out in this test mode.

[0063] The first test item is a longitudinal load test item, in which the brake arc block 13 outputs a plurality of brake loads of different pressures to the wheel shaft 3, and the rotation speed change of the wheel shaft 3 under a plurality of pressures is monitored.

[0064] The second test item is an eccentric load test item, in which the tester adjusts the arrangement position of the counterweight seat 22 in each counterweight guide groove 20 and the installation number of the weight on the counterweight seat 22 in advance, so as to realize the eccentric load when the wheel shaft 3 rotates, and the rotation speed sensor 4 monitors the rotation speed change in the eccentric complex test item in real time during the test.

[0065] In the first test item and the second test item, the relative position of the outer sleeve pipe 8 and the inner shaft pipe 11 can be adjusted by driving the driving screw rod 5, so as to adjust the influence of different wheel shaft 3 lengths and different loads on the rotation speed of the wheel shaft 3.

[0066] The third test item is an axial load test item, under which the push rod applies a set pressure to the wheel shaft 3, and the rotational speed sensor 4 monitors the rotational speed change of the wheel shaft 3 under different pressures in real time;

[0067] The second measurement mode is a constant power variable temperature test mode, the third measurement mode is a variable power constant temperature test mode, and the fourth measurement mode is a variable power variable temperature test mode. Under each test mode, the influence of the engine body 2 load on the rotational speed of the wheel shaft 3 can be tested by the control variable test method.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the scope of protection of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A new energy vehicle load speed test device, comprising a test plate (1) and an engine body (2), respectively, and the end of the engine body (2) is provided with an axle (3), characterized in that: The outer side of the engine body (2) is respectively provided with an environmental control mechanism and a rotating speed sensor (4) for monitoring the rotating speed of the wheel shaft (3), the inner wall of the test plate (1) is provided with a carrier (6) driven by a driving screw rod (5), the inside of the carrier (6) is provided with a pitch adjusting module (7), the circumferential side of the pitch adjusting module (7) is drivingly connected with two symmetrically arranged brake modules, the inner wall of the carrier (6) is rotatably connected with an outer sleeve tube (8), the circumferential side of the outer sleeve tube (8) is fixedly provided with a brake disc (9) matched with the brake module, the tail of the outer sleeve tube (8) is provided with an eccentric counterweight assembly, the tail of the carrier (6) is fixedly provided with a distance measuring probe (10) coaxially arranged with the outer sleeve tube (8), the inner wall of the outer sleeve tube (8) is slidingly connected and drivingly matched with an inner shaft tube (11), the end of the inner shaft tube (11) is provided with a clamping assembly for clamping the wheel shaft (3), the surface of the test plate (1) is fixedly provided with an axial load assembly matched with the wheel shaft (3); The pitch adjusting module (7) respectively comprises an adjusting motor fixed to the top surface of the carrier (6) and a pitch adjusting screw rod rotatably connected between the inner surface of the carrier (6), the output shaft end of the adjusting motor is fixedly connected with the pitch adjusting screw rod, the axis of the pitch adjusting screw rod is perpendicular to the axis of the inner shaft tube (11), the circumferential side of the pitch adjusting screw rod is symmetrically provided with a forward thread part and a reverse thread part, the circumferential sides of the forward thread part and the reverse thread part are respectively drivingly connected with the two brake modules; The brake module comprises a pressing clamp (12), the circumferential side of the pressing clamp (12) is slidingly connected with the carrier (6), the inner wall of the pressing clamp (12) is drivingly connected with the pitch adjusting screw rod, the bottom surface of the pressing clamp (12) is slidingly connected with a brake arc block (13) matched with the brake disc (9), a group of pressure sensors a (14) are arranged between the opposite surfaces of the pressing clamp (12) and the brake arc block (13); The eccentric counterweight assembly comprises a counterweight frame (19) fixed to the circumferential side of the outer sleeve tube (8), a group of counterweight guide grooves (20) in circumferential array are arranged in the inside of the counterweight frame (19), a position adjusting screw rod (21) is rotatably connected between the inner surface of the counterweight frame (19) and the inside of each counterweight guide groove (20), a counterweight seat (22) driven by the position adjusting screw rod (21) is slidingly connected to the inner wall of the counterweight guide groove (20), a group of positioning rods (23) are fixedly arranged on the top surface of the counterweight seat (22), a group of counterweight weights (24) are sleeved on the circumferential side of each positioning rod (23), a locking nut (25) for limiting the position of the counterweight weight (24) is threadedly connected to the circumferential side of the positioning rod (23), a scale mark is arranged on the surface of the counterweight frame (19) and adjacent to each counterweight guide groove (20). The axial load assembly respectively comprises a pressure seat (26) in sliding connection with the test plate (1) and a group of pressure push rods (27), the movable end of the pressure push rod (27) is fixedly connected with the pressure seat (26), the end surface of the pressure seat (26) is provided with a group of guide rods (28) in sliding connection with the support plate (31), the pressure sensor b (29) is installed between the opposite surfaces of the pressure seat (26) and the support plate (31), the cross section of the guide rod (28) is T-shaped, and the axis of the guide rod (28) and the pressure push rod (27) is parallel to the axis of the inner shaft tube (11).

2. The new energy vehicle load rotation speed testing device according to claim 1, characterized in that: The environmental control mechanism comprises an environmental box (15) sleeved outside the engine body (2), the surface of the environmental box (15) is fixedly provided with a single-chip microcomputer (16) and a monitoring host computer (17) in data connection with the engine body (2), the port of the single-chip microcomputer (16) is electrically connected with a temperature probe, the port of the distance measuring probe (10) is electrically connected with the single-chip microcomputer (16), the bottom of the environmental box (15) is fixedly and communicatively provided with a ventilation pipe (18), the inner wall of the ventilation pipe (18) is fixedly and sequentially provided, from top to bottom, with an electric heating wire and an axial flow fan, and the inside of the ventilation pipe (18) is provided with a group of regularly distributed semiconductor refrigerating fins.

3. The new energy vehicle load rotation speed testing device according to claim 1, characterized in that: The outer sleeve tube (8) and the inner shaft tube (11) are both hollow tubular structures with open ends, and the cross sections of the outer sleeve tube (8) and the inner shaft tube (11) are regular polygons.

4. The new energy vehicle load rotation speed testing device according to claim 1, characterized in that: The axes of the position adjusting screw rod (21) and the positioning rod (23) are perpendicular to the axis of the outer sleeve tube (8), and the end of the position adjusting screw rod (21) is fixedly provided with a handle.

5. The new energy vehicle load rotation speed testing device according to claim 1, characterized in that: The clamping assembly respectively comprises two symmetrical half-arc pipe clamps (30) fixed to the ends of the inner shaft tube (11), a support plate (31) rotatably connected to the circumferential surface of the inner shaft tube (11) and connected with the axial load assembly, a clamping screw rod (33) horizontally arranged and rotatably connected to the inner wall of the support plate (31), a clamping ring (34) slidingly connected to the circumferential surface of the inner shaft tube (11), and a pressing plate (32) rotatably connected to the circumferential surface of the clamping ring (34), and the circumferential surface of the clamping screw rod (33) is in transmission connection with the pressing plate (32).

6. The new energy vehicle load rotation speed testing device according to claim 5, characterized in that: The outer side of the half-arc pipe clamp (30) is fixedly provided with a guide ring surface matched with the clamping ring (34), the whole arc degree of the half-arc pipe clamp (30) is 150°, and the inner wall of the half-arc pipe clamp (30) is uniformly provided with friction lines.

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