A vehicle testing aid based on a rotating drum vehicle cooling fan

CN224731535UActive Publication Date: 2026-09-08JIANGLING MOTORS
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202521476860.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-15
Publication Date
2026-09-08
Estimated Expiration
2035-07-15

AI Technical Summary

Technical Problem

但是司机助安装在车辆的内部时会占用车辆内部的空间,不方便测试人员对车辆的调整且车辆内部的空间有限不方便司机助角度的调整,在进行极限温度的测试时,司机助容易受到温度的影响无法正常工作

Benefits of technology

1、本实用新型通过伸缩杆伸缩调整安装架高度,调整机构调整安装架横向和纵向的角度,且伸缩架安装在冷却风扇的上表面,从而达到了能够自由调整司机助的角度,方便测试人员进行观察,且不占用车内空间,方便测试人员操作车辆。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224731535U_ABST
    Figure CN224731535U_ABST
Patent Text Reader

Abstract

The utility model provides a kind of vehicle test auxiliary device based on drum vehicle cooling fan, it is related to vehicle test equipment technical field, including cooling fan, the upper end of cooling fan is fixedly connected with telescopic link, the inside of telescopic link is equipped with limit slot, the side of telescopic link close to limit slot is equipped with limit pin, the upper end of telescopic link is equipped with adjusting mechanism, the upper end of adjusting mechanism is equipped with mounting bracket, the inside of mounting bracket is fixedly connected with metal plate, the side of mounting bracket is equipped with baffle, the adjusting mechanism includes support frame, arc slot is opened in the both sides of support frame surface, mounting bracket height is adjusted by telescopic link, adjusting mechanism adjusts the angle of mounting bracket transverse and longitudinal, and telescopic frame is installed on the upper surface of cooling fan, to reach the angle of driver assistant can be freely adjusted, it is convenient for test personnel to observe, and it does not occupy the space in car, it is convenient for test personnel to operate vehicle's effect.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of vehicle testing equipment technology, and in particular to a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan. Background Technology

[0002] During vehicle testing, various data need to be transmitted and recorded, and fed back to the test personnel in the vehicle in a timely manner. This device is called a driver aid. Nowadays, driver aids are generally installed inside the vehicle by hand or by a mounting bracket, allowing the driver to observe the data while the test is being conducted. However, when the driver assistance system is installed inside the vehicle, it occupies interior space, making it inconvenient for testers to adjust the vehicle. Furthermore, the limited interior space makes it difficult to adjust the angle of the driver assistance system. During extreme temperature tests, the driver assistance system is easily affected by temperature and may not function properly. Utility Model Content

[0003] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, this application provides a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan, which allows testers to easily observe data through multi-angle adjustments and can automatically adjust the temperature.

[0005] The first aspect of this application provides a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan, comprising: Telescopic pole; An adjustment mechanism is located at the top of the telescopic rod; A support frame, the bottom of which is welded to the top of the telescopic rod; Arc-shaped grooves are formed on both sides of the surface of the support frame; A rotating frame, which is rotatably connected inside the support frame; A connecting post, which is threadedly connected to the surfaces on both sides of the rotating frame; A friction block, which is movably connected to the inner surface of the connecting column; Mounting plate, which is fixedly connected to the upper surface of the rotating frame; A circular groove is formed at the center of the upper surface of the mounting plate; A tapered groove is formed around the upper surface of the mounting plate; A cylinder, which is rotatably connected inside a circular groove; A connecting plate, which is fixedly connected to the upper end of the cylinder; A limiting block, which is movably connected to the lower end of the connecting plate; A pressure spring is fixedly connected to the upper surface of the limiting block.

[0006] Preferably, the telescopic rod; A cooling fan, which is fixedly connected to the upper end of the telescopic rod; A limiting groove is formed inside the telescopic rod; A limiting pin is engaged with the side of the telescopic rod near the limiting groove. Mounting bracket, which is fixedly connected to the upper surface of the connecting plate; A metal plate, which is fixedly connected inside the mounting frame; A stop bar, which is fixedly connected to the side of the mounting bracket; A triggering mechanism is located on the back of the metal plate; A power supply, which is fixedly connected to the top of the mounting bracket inside the mounting frame; A control switch, which is fixedly connected to the top of the mounting bracket surface; A fan, which is fixedly connected to the back of the mounting bracket; A heating wire, which is fixedly connected to the back of a metal plate; A display, which is movably connected to the mounting bracket on the side near the stop bar; Preferably, the triggering mechanism; A bimetallic strip, one end of which is fixedly connected to the surface of a metal plate; A sliding groove is provided on both sides of the bimetallic sheet; A pull cord, which is fixedly connected to the end of the bimetallic strip; A pressure switch is fixedly connected to the other end of the pull rope.

[0007] Preferably, the center of the arc-shaped groove is the same as the axis of the rotating frame, and the friction block is located between the connecting column and the rotating frame.

[0008] Preferably, the end of the pressure spring away from the limiting block is fixedly connected to the lower surface of the connecting plate. There are ten conical grooves, which are evenly arranged around the center of the mounting plate. There are ten limiting blocks, which are evenly arranged around the center of the mounting plate. The limiting blocks are conical blocks with the same size as the conical grooves.

[0009] Preferably, the baffle is a ring-shaped strip made of rubber, the mounting bracket is a hollow frame with one end open, the baffle is located around the opening of the mounting bracket, the display is located on the inner surface of the mounting bracket, and the baffle is attached to the surface of the display.

[0010] Preferably, the end of the bimetallic strip away from the metal plate is slidably connected inside the groove.

[0011] Preferably, one end of the pressure switch is connected to a power source, and the other end of the pressure switch, away from the power source, is connected to a fan.

[0012] Preferably, one end of the control switch is connected to a power source, and the end of the control switch away from the power source is connected to a heating wire.

[0013] Preferably, the telescopic rod is divided into inner and outer layers. The inner layer has the limiting groove on its surface, and the outer layer has a round hole on its surface. The limiting pin passes through the round hole and is inserted into the limiting groove.

[0014] In some possible embodiments, the vehicle testing auxiliary device based on a rotary drum vehicle cooling fan provided in this application has all the beneficial effects of the fastener, which will not be repeated here.

[0015] Compared with the prior art, the technical solution provided in this application includes at least the following technical effects: 1. This utility model adjusts the height of the mounting frame by telescopic rod extension and retraction, and adjusts the horizontal and vertical angles of the mounting frame by adjustment mechanism. The telescopic frame is installed on the upper surface of the cooling fan, thereby achieving the ability to freely adjust the angle of the driver's assistant, which is convenient for testers to observe, and does not occupy the interior space of the vehicle, making it convenient for testers to operate the vehicle.

[0016] 2. This utility model involves attaching the display to the surface of a metal plate. When the temperature of the metal plate increases, a trigger mechanism starts a fan to dissipate heat from the metal plate. When the temperature is low, a control switch is turned on, and a heating wire heats the metal plate. This achieves the effect of indirectly heating and dissipating heat from the display based on changes in the external temperature, thus maintaining the normal operation of the display.

[0017] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This utility model presents a frontal three-dimensional structural diagram of a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan. Figure 2 This utility model presents a front sectional three-dimensional structural diagram of the mounting bracket and adjustment mechanism of a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan. Figure 3 This invention proposes a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan. Figure 2 A magnified structural diagram at point A; Figure 4 A frontal perspective view of the adjustment mechanism of a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan is provided for this utility model. Figure 5 A front sectional perspective three-dimensional structural schematic diagram of the adjustment mechanism of a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan is provided for this utility model. Figure 6 This invention proposes a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan. Figure 5 A magnified structural diagram at point B; Figure 7 This utility model provides a side sectional three-dimensional structural schematic diagram of the mounting bracket for a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan; Figure 8 This invention presents a three-dimensional structural diagram of the back of a metal plate of a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan.

[0019] Figure label: 1. Cooling fan; 2. Telescopic rod; 3. Limiting groove; 4. Limiting pin; 5. Adjustment mechanism; 501. Support frame; 502. Arc groove; 503. Rotating frame; 504. Connecting column; 505. Friction block; 506. Mounting plate; 507. Circular groove; 508. Conical groove; 509. Cylinder; 510. Connecting plate; 511. Limiting block; 512. Pressure spring; 6. Mounting bracket; 7. Metal plate; 8. Backing strip; 9. Triggering mechanism; 901. Bimetallic strip; 902. Slide groove; 903. Pull rope; 904. Pressure switch; 10. Power supply; 11. Control switch; 12. Fan; 13. Heating wire; 14. Display. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0022] In some embodiments, according to Figure 1 - Figure 6As shown, a vehicle testing auxiliary device based on a rotary drum vehicle cooling fan includes a cooling fan 1. A telescopic rod 2 is fixedly connected to the upper end of the cooling fan 1. The telescopic rod 2 has a limiting groove 3 inside and a limiting pin 4 on the side of the telescopic rod 2 near the limiting groove 3. The telescopic rod 2 is divided into inner and outer layers. The inner layer has a limiting groove 3 on its surface, and the outer layer has a round hole on its surface. The limiting pin 4 passes through the round hole and is inserted into the limiting groove 3. An adjustment mechanism 5 is provided at the upper end of the telescopic rod 2, and a mounting bracket 6 is provided at the upper end of the adjustment mechanism 5, so that the telescopic rod 2 can move up and down and can be fixed by the locking of the limiting pin 4 with the limiting groove 3.

[0023] The adjustment mechanism 5 includes a support frame 501, which is fixedly connected to the top of the telescopic rod 2. Arc-shaped grooves 502 are provided on both sides of the surface of the support frame 501. A rotating frame 503 is rotatably connected inside the support frame 501. Connecting posts 504 are provided on both sides of the rotating frame 503. Friction blocks 505 are provided on the surface of the connecting posts 504. The connecting posts 504 are threadedly connected to the surface of the rotating frame 503. The center of the arc-shaped groove 502 is the same as the axis of the rotating frame 503. The friction blocks 505 are located between the connecting posts 504 and the rotating frame 503. When the connecting posts 504 are tightened, the friction between the friction blocks 505 and the support frame 501 increases, so that the rotating frame 503 can be fixed inside the support frame 501.

[0024] A mounting plate 506 is fixedly connected to the upper surface of the rotating frame 503. A circular groove 507 is provided at the center of the upper surface of the mounting plate 506. A tapered groove 508 is provided around the upper surface of the mounting plate 506. A cylinder 509 is rotatably connected inside the circular groove 507. A connecting plate 510 is fixedly connected to the upper end of the cylinder 509. The connecting plate 510 can be rotatably connected inside the mounting plate 506.

[0025] The lower end of the connecting plate 510 is provided with a limiting block 511. A pressure spring 512 is fixedly connected to the upper surface of the limiting block 511. The end of the pressure spring 512 away from the limiting block 511 is fixedly connected to the lower surface of the connecting plate 510. There are ten conical grooves 508, which are evenly arranged in a circle around the center of the mounting plate 506. There are ten limiting blocks 511, which are evenly arranged in a circle around the center of the mounting plate 506. The limiting blocks 511 are conical blocks with the same size as the conical grooves 508, so that the limiting blocks 511 can mesh with the conical grooves 508 to fix the connecting plate 510 to the surface of the mounting plate 506.

[0026] In this embodiment, the rotating frame 503 rotates longitudinally inside the support frame 501, and the rotating frame 503 is fixed inside the support frame 501 when the connecting column 504 is tightened. The connecting plate 510 is rotatably connected to the inside of the mounting plate 506, and the connecting plate 510 can be interlocked with the tapered groove 508 through the limiting block 511, so that the connecting plate 510 can rotate laterally on the surface of the mounting plate 506 and can be limited. The mounting frame 6 is fixedly connected to the upper surface of the connecting plate 510. The telescopic rod 2 is fixed by moving up and down through the inner layer and by engaging with the limiting pin 4 and the limiting groove 3. This allows for up and down movement and enables multi-angle adjustment of the mounting frame 6, making it convenient for testers to observe the contents of the driver's aid. Example 2: According to Figure 7 - Figure 8 As shown, a metal plate 7 is fixedly connected inside the mounting bracket 6. A baffle 8 is provided on the side of the mounting bracket 6. A trigger mechanism 9 is provided on the back of the metal plate 7. A power supply 10 is provided at the top inside the mounting bracket 6. A control switch 11 is provided at the top of the surface of the mounting bracket 6. One end of the control switch 11 is connected to the power supply 10. The end of the control switch 11 away from the power supply 10 is connected to a heating wire 13, so that when the control switch 11 is turned on, the heating wire 13 starts to work and heats the metal plate 7. The heat can be transferred to the surrounding area of ​​the metal plate 7 through the metal plate 7.

[0027] A fan 12 is provided on the back of the mounting bracket 6, and a heating wire 13 is fixedly connected to the back of the metal plate 7. A display 14 is provided on the side of the mounting bracket 6 near the baffle 8. The baffle 8 is a ring-shaped strip made of rubber. The mounting bracket 6 is a hollow frame with one end open. The baffle 8 is located around the opening of the mounting bracket 6. The display 14 is located on the inner surface of the mounting bracket 6, and the baffle 8 is attached to the surface of the display 14. The baffle 8 can block the display 14, making it convenient for the installation of the display 14.

[0028] The triggering mechanism 9 includes a bimetallic strip 901. The bimetallic strip 901 has grooves 902 on both sides. One end of the bimetallic strip 901 is fixedly connected to the surface of the metal plate 7, and the other end of the bimetallic strip 901 is slidably connected to the inside of the groove 902. When the bimetallic strip 901 is heated to a high temperature, it can deform. At this time, the bimetallic strip 901 bends and deforms.

[0029] A pull rope 903 is fixedly connected to one end of the bimetallic strip 901. A pressure switch 904 is provided at the other end of the pull rope 903. One end of the pressure switch 904 is connected to a power supply 10, and the other end of the pressure switch 904 away from the power supply 10 is connected to a fan 12. When the bimetallic strip 901 is heated and bent and deformed, the pressure switch 904 is pulled by the pull rope 903. The pressure switch 904 controls the fan 12 to start working to cool the metal plate 7.

[0030] In this embodiment, the display 14 is attached to the surface of the metal plate 7. When the extreme temperature test is performed, the ambient temperature is either high or low. When the ambient temperature is low, the control switch 11 is turned on, and the heating wire 13 starts to work to heat the metal plate 7. The heat is transferred to the surface of the display 14 through the metal plate 7 to prevent the display 14 from being damaged due to low temperature. When the ambient temperature is high, the bimetallic strip 901 shrinks due to heat and slides inside the slide groove 902. At this time, the bimetallic strip 901 pulls the pull rope 903 to trigger the pressure switch 904. At this time, the fan 12 starts to work to cool the metal plate 7.

[0031] Working principle: The telescopic rod 2 is installed on the upper surface of the cooling fan 1. A support frame 501 is fixedly connected to the upper end of the telescopic rod 2. A rotating frame 503 is rotatably connected inside the support frame 501. A mounting plate 506 is fixedly connected to the upper end of the rotating frame 503. A cylinder 509 is rotatably connected inside the mounting plate 506. A connecting plate 510 is fixedly connected to the upper end of the cylinder 509. A mounting bracket 6 is fixedly connected to the upper end of the connecting plate 510. A display 14 is installed inside the mounting bracket 6. The display 14 is snapped between the metal plate 7 and the stop strip 8. The telescopic rod 2 is adjusted to a suitable height by pulling it. The height of the telescopic rod 2 is positioned by the limit pin 4 snapping into the limit groove 3. Connect the column 504 and rotate the rotating frame 503 to a suitable angle, then tighten the connecting column 504. At this time, the friction between the friction block 505 and the support frame 501 increases, and the rotating frame 503 is fixed inside the support frame 501, realizing the adjustment of the longitudinal angle. Then rotate the connecting plate 510 to a suitable angle. At this time, the limiting block 511 at the bottom of the connecting plate 510 is engaged inside the conical groove 508 to limit the connecting plate 510, realizing the adjustment of the lateral angle, realizing the free adjustment of the angle of the display 14, and the driver's aid is installed on the outside of the test vehicle, without occupying the space inside the vehicle, which is convenient for the driver to carry out the vehicle test work and convenient for the test personnel to observe the data. The display 14 is attached to the surface of the metal plate 7. During extreme temperature testing, the ambient temperature can be high or low. When the ambient temperature is low, the control switch 11 is turned on, and the heating wire 13 starts working, heating the metal plate 7. The heat is transferred through the metal plate 7 to the surface of the display 14, preventing damage to the display 14 due to low temperature. When the ambient temperature is high, the bimetallic strip 901 contracts due to heat and slides inside the slide groove 902. At this time, the bimetallic strip 901 pulls the pull rope 903, triggering the pressure switch 904. The fan 12 then starts working, cooling the metal plate 7. The temperature of the display 14 is transferred to the surface of the metal plate 7, achieving rapid cooling.

[0032] In this application, it should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. The term "multiple" refers to two or more, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In this application, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A vehicle testing auxiliary device based on a rotary drum vehicle cooling fan, characterized in that, include: Telescopic pole (2); Adjustment mechanism (5), the adjustment mechanism (5) is located at the top of the telescopic rod (2); A support frame (501) is provided, the bottom of which is welded to the top of the telescopic rod (2); Arc-shaped grooves (502) are formed on both sides of the surface of the support frame (501); A rotating frame (503) is rotatably connected inside a support frame (501); A connecting post (504) is threaded to the surfaces on both sides of the rotating frame (503); Friction block (505), which is movably connected to the inner surface of connecting post (504); Mounting plate (506), which is fixedly connected to the upper surface of rotating frame (503); A circular groove (507) is formed at the center of the upper surface of the mounting plate (506); A tapered groove (508) is formed around the upper surface of the mounting plate (506); A cylinder (509) is rotatably connected inside a circular groove (507); A connecting plate (510) is fixedly connected to the upper end of the cylinder (509); A limiting block (511) is movably connected to the lower end of the connecting plate (510); A pressure spring (512) is fixedly connected to the upper surface of the limiting block (511).

2. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 1, characterized in that: The telescopic rod (2). Cooling fan (1), the cooling fan (1) is fixedly connected to the upper end of telescopic rod (2); The limiting groove (3) is formed inside the telescopic rod (2); Limiting pin (4), the limiting pin (4) is engaged with the side of the telescopic rod (2) near the limiting groove (3); Mounting bracket (6), which is fixedly connected to the upper surface of connecting plate (510); Metal plate (7), which is fixedly connected inside the mounting bracket (6); A stop bar (8) is fixedly connected to the side of the mounting bracket (6); A triggering mechanism (9) is provided on the back of the metal plate (7); Power supply (10), which is fixedly connected to the top of the mounting bracket (6); Control switch (11), which is fixedly connected to the top of the surface of the mounting bracket (6); Fan (12), said fan (12) is fixedly connected to the back of mounting bracket (6); Heating wire (13), which is fixedly connected to the back of metal plate (7); The display (14) is movably connected to the mounting bracket (6) on the side near the stop bar (8).

3. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 2, characterized in that: The triggering mechanism (9); A bimetallic strip (901), one end of which is fixedly connected to the surface of a metal plate (7); A groove (902) is provided on both sides of the bimetallic sheet (901); A pull cord (903) is fixedly connected to the end of a bimetallic strip (901); Pressure switch (904), which is fixedly connected to the other end of pull rope (903).

4. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 1, characterized in that: The center of the arc groove (502) is the same as the axis of the rotating frame (503), and the friction block (505) is located between the connecting column (504) and the rotating frame (503).

5. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 1, characterized in that: The end of the pressure spring (512) away from the limiting block (511) is fixedly connected to the lower surface of the connecting plate (510). There are ten conical grooves (508), which are evenly arranged around the center of the mounting plate (506). There are ten limiting blocks (511), which are evenly arranged around the center of the mounting plate (506). The limiting blocks (511) are conical blocks with the same size as the conical grooves (508).

6. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 2, characterized in that: The baffle (8) is a ring-shaped strip made of rubber. The mounting bracket (6) is a hollow frame with one end open. The baffle (8) is located around the opening of the mounting bracket (6). The display (14) is located on the inner surface of the mounting bracket (6), and the baffle (8) is attached to the surface of the display (14).

7. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 3, characterized in that: The end of the bimetallic strip (901) away from the metal plate (7) is slidably connected inside the groove (902).

8. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 3, characterized in that: One end of the pressure switch (904) is connected to a power source (10), and the other end of the pressure switch (904) away from the power source (10) is connected to a fan (12).

9. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 2, characterized in that: One end of the control switch (11) is connected to a power source (10), and the other end of the control switch (11) away from the power source (10) is connected to a heating wire (13).

10. The vehicle testing auxiliary device based on a rotary drum vehicle cooling fan according to claim 2, characterized in that: The telescopic rod (2) is divided into inner and outer layers. The inner layer has the limiting groove (3) on its surface, and the outer layer has a round hole on its surface. The limiting pin (4) passes through the round hole and is inserted into the limiting groove (3).