Automobile model and tail diffuser for wind tunnel test

Abstract

The utility model discloses a tail diffuser for a wind tunnel test, which comprises a sliding plate and a rotating plate, the rotating plate is in running fit with the sliding plate, the rotating plate can rotate around a rotating shaft relative to the sliding plate, and the sliding plate is provided with an angle adjusting mechanism for driving the rotating plate to rotate so as to adjust the angle of the rotating plate; the angle adjusting mechanism comprises an adjusting motor fixedly installed on the sliding plate, and a connecting rod mechanism is arranged between an output shaft of the adjusting motor and the rotating shaft. The connecting rod mechanism comprises a first connecting rod and a second connecting rod, the first connecting rod and an output shaft of the adjusting motor synchronously rotate, and the two ends of the second connecting rod are hinged to the first connecting rod and the rotating plate respectively. The utility model further provides an automobile model which comprises a chassis, the tail diffuser used for the wind tunnel test is installed at the tail of the chassis, and the rotating shaft is located in the width direction of the chassis. According to the automobile model and the tail diffuser used for the wind tunnel test, the angle can be steplessly adjusted so as to meet the requirements of the wind tunnel test.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile models, in particular to an automobile model and a rear diffuser used for a wind tunnel test. Background Art

[0002] With the continuous improvement of automobile power performance and the continuous improvement of road infrastructure, the average speed of vehicles has gradually increased, which has put forward higher requirements for the high-speed handling stability of vehicles. Rear diffusers have appeared more and more on various types of vehicles. Rear diffusers, which were often used in high-performance models such as racing cars and sports cars in the past, are now gradually used in daily household models. This functional component is mainly installed on the rear bumper skin of the vehicle. By combing and guiding the airflow at the rear of the vehicle, it reduces the air lift at the rear of the vehicle and improves the high-speed handling stability of the vehicle.

[0003] The working principle of the rear diffuser is mainly based on fluid dynamics, which utilizes the principle of gas or liquid flow. The main function of the rear diffuser is to increase the downforce of the car when it is driving at high speed, thereby improving the vehicle's grip and stability. The diffuser combs the airflow under the car chassis and quickly guides it out, thereby forming a low-pressure area under the car chassis. This design utilizes the inverse relationship between fluid velocity and pressure. When the airflow velocity increases, according to the Bernoulli equation, the pressure will decrease, forming a low-pressure area. In this way, the airflow pressure on the top of the car will be greater than the airflow pressure at the bottom, thereby generating an air pressure difference, causing the car to generate a pressure toward the ground.

[0004] In addition, the efficiency of the diffuser is also affected by its installation position (such as ground clearance and airflow inlet and outlet height). The lower the ground clearance, the greater the downforce generated by the diffuser and the higher the efficiency; conversely, the higher the ground clearance, the smaller the downforce generated and the lower the efficiency. The height difference of the airflow inlet and outlet will also affect the suction effect of the diffuser, and thus affect its working efficiency.

[0005] The design of the diffuser also considers the optimal angle to achieve the best downforce effect. If the angle is too large or too small, it may reduce the effectiveness of the diffuser. The internal structure of the diffuser, such as multiple deflectors, also helps to enhance its effect by guiding the airflow to maximize the generation of downforce. In general, the rear diffuser is an aerodynamic device that generates strong downforce by accelerating the airflow under the car chassis and reducing the air pressure on the upper part of the chassis, thereby improving the stability and grip of the car at high speeds.

[0006] In order to study the impact of different angles on vehicle performance, it is necessary to conduct wind tunnel tests on diffusers at different angles when designing diffusers. However, existing diffusers cannot achieve stepless adjustment of angles, and each different angle requires separate corresponding parts, which not only increases costs, but also requires constant disassembly and assembly testing, reducing test efficiency. Summary of the invention

[0007] In view of this, the purpose of the utility model is to provide a car model and a tail diffuser for wind tunnel testing, wherein the diffuser angle can be adjusted steplessly to meet the wind tunnel test requirements of diffusers at different angles.

[0008] In order to achieve the above object, the utility model provides the following technical solutions:

[0009] The utility model firstly proposes a tail diffuser for wind tunnel test, comprising a sliding plate and a rotating plate, wherein the rotating plate is rotationally matched with the sliding plate, and the rotating plate can rotate around a rotating shaft relative to the sliding plate, and an angle adjustment mechanism for driving the rotating plate to rotate so as to adjust the angle of the rotating plate is provided on the sliding plate;

[0010] The angle adjustment mechanism includes an adjusting motor fixedly mounted on the sliding plate, and a connecting rod mechanism is provided between the output shaft of the adjusting motor and the rotating plate; the connecting rod mechanism includes a first connecting rod and a second connecting rod, the first connecting rod rotates synchronously with the output shaft of the adjusting motor, and the two ends of the second connecting rod are respectively hingedly connected to the first connecting rod and the rotating plate.

[0011] Furthermore, a hinge is provided between the sliding plate and the rotating plate.

[0012] Furthermore, the output shaft of the adjusting motor is parallel to the rotating shaft.

[0013] Furthermore, the number of the angle adjustment mechanisms is two, and the two angle adjustment mechanisms are symmetrically arranged between the sliding plate and the two ends of the rotating plate.

[0014] The utility model also provides a car model, comprising a chassis, wherein the rear diffuser for wind tunnel test as described above is installed at the rear of the chassis, and the rotating shaft is located in the width direction of the chassis.

[0015] Furthermore, the chassis is provided with a sliding drive mechanism for driving the sliding plate to move along a direction perpendicular to the rotating shaft.

[0016] Furthermore, the sliding drive mechanism comprises an electric push rod, an outer sleeve of the electric push rod is fixedly connected to the chassis, and a push-pull rod of the electric push rod is connected to the sliding plate.

[0017] Furthermore, a fixing bracket is provided on the chassis, and the outer sleeve of the electric push rod is fixedly installed on the fixing bracket.

[0018] Furthermore, the number of the electric push rods is two, and the two electric push rods are symmetrically arranged at two ends of the sliding plate.

[0019] Furthermore, the sliding plate is parallel to the chassis.

[0020] The beneficial effects of the utility model are:

[0021] The utility model is used for a tail diffuser for a wind tunnel test. By installing an angle adjustment mechanism on a sliding plate, the angle of the rotating plate relative to the sliding plate can be steplessly adjusted by using the angle adjustment mechanism when conducting a wind tunnel test. Specifically, an adjustment motor drives the first connecting rod to rotate. Under the driving action of the first connecting rod, the second connecting rod drives the rotating plate to rotate relative to the sliding plate around the rotating axis, thereby achieving the technical purpose of adjusting the rotation angle of the rotating plate. In this way, when conducting a wind tunnel test, wind tunnel tests of different angles can be conveniently carried out by adjusting the angle of the rotating plate, without the need to separately manufacture matching parts for each angle. At the same time, the diffuser can achieve stepless angle adjustment after a one-time installation, without the need for multiple disassembly and assembly, which can effectively reduce the test cost and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0023] Figure 1 It is a structural schematic diagram of the automobile model of the utility model;

[0024] Figure 2 A top view of the rear diffuser used in wind tunnel testing.

[0025] Description of reference numerals:

[0026] 10-chassis; 11-sliding plate; 12-rotating plate; 13-rotating shaft; 14-adjusting motor; 15-first connecting rod; 16-second connecting rod; 17-hinge; 18-outer sleeve; 19-push-pull rod; 20-fixed bracket. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] like Figure 1As shown, the automobile model of this embodiment includes a chassis 10, and a rear diffuser for wind tunnel testing is installed at the rear of the chassis 10. Specifically, Figure 2 As shown, the tail diffuser for wind tunnel test in this embodiment includes a sliding plate 11 and a rotating plate 12, the rotating plate 12 is rotatably matched with the sliding plate 11, and the rotating plate 12 can rotate relative to the sliding plate 11 around a rotating shaft 13. The sliding plate 11 of this embodiment is provided with an angle adjustment mechanism for driving the rotating plate 12 to rotate to adjust the angle of the rotating plate 12. The angle adjustment mechanism of this embodiment includes an adjustment motor 14 fixedly mounted on the sliding plate 11, and a connecting rod mechanism is provided between the output shaft of the adjustment motor 14 and the rotating plate 12. The connecting rod mechanism of this embodiment includes a first connecting rod 15 and a second connecting rod 16, the first connecting rod 15 rotates synchronously with the output shaft of the adjustment motor 14, and the two ends of the second connecting rod 16 are respectively hingedly connected to the first connecting rod 15 and the rotating plate 12. Specifically, in this embodiment, the rotating shaft 13 is located in the width direction of the chassis 10. In this embodiment, a hinge 17 is provided between the sliding plate 11 and the rotating plate 12, and the rotating shaft of the hinge 17 is the rotating shaft 13. The adjusting motor 14 of this embodiment is a stepping motor, and the output shaft of the adjusting motor 14 is parallel to the rotating shaft 13 .

[0029] In the preferred implementation of this embodiment, there are two angle adjustment mechanisms, which are symmetrically arranged between the two ends of the sliding plate 11 and the rotating plate 12, and the adjustment motors 14 of the two angle adjustment mechanisms rotate synchronously, so that the rotation of the rotating plate 12 and the position of the rotating plate 12 after rotating to the right position can be made more stable. The two ends of the output shaft of the adjustment motor 14 of this embodiment are respectively installed with connecting rod mechanisms, so that the connection points of the rotating plate 12 can be increased and the connection strength of the rotating plate 12 can be improved.

[0030] In this embodiment, the chassis 10 is provided with a sliding drive mechanism for driving the sliding plate 11 to move in a direction perpendicular to the rotating shaft 13. The sliding drive mechanism of this embodiment includes an electric push rod, the outer sleeve 18 of the electric push rod is fixedly connected to the chassis 10, and the push-pull rod 19 of the electric push rod is connected to the sliding plate 11. In this way, the position of the rotating plate 12 at the rear of the car can be adjusted by using the electric push rod to push the sliding plate 11 to move. When the wind tunnel test of the rear diffuser is not required, the sliding plate 11 can be driven to move toward the head direction of the car so that the rotating plate 12 is stored in the chassis 10. Specifically, the sliding plate 11 is parallel to the chassis 10, and a fixed bracket 20 is provided on the chassis 10. The outer sleeve 18 of the electric push rod is fixedly installed on the fixed bracket 20. Specifically, the electric push rods of this embodiment are set to two, and the two electric push rods are symmetrically arranged at both ends of the sliding plate 11, so that the sliding of the sliding plate 11 can be more stable.

[0031] In the automobile model of this embodiment, a rear diffuser for wind tunnel test is installed at the rear of chassis 10. By installing an angle adjustment mechanism on the sliding plate 11, the angle of the rotating plate 12 relative to the sliding plate 11 can be adjusted steplessly by using the angle adjustment mechanism during the wind tunnel test. Specifically, the adjustment motor 14 drives the first connecting rod 15 to rotate. Under the driving action of the first connecting rod 15, the second connecting rod 16 drives the rotating plate 12 to rotate relative to the sliding plate 11 around the rotating shaft 13, thereby achieving the technical purpose of adjusting the rotation angle of the rotating plate 12. In this way, when conducting a wind tunnel test, wind tunnel tests at different angles can be conveniently performed by adjusting the angle of the rotating plate 12, without the need to manufacture matching parts for each angle. At the same time, the diffuser can achieve stepless angle adjustment after one-time installation, without the need for multiple disassembly and assembly, which can effectively reduce the test cost and improve the test efficiency.

[0032] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A tail diffuser for wind tunnel testing, characterized in that: It comprises a sliding plate and a rotating plate, wherein the rotating plate is rotatably matched with the sliding plate, and the rotating plate can rotate relative to the sliding plate around a rotating axis, and the sliding plate is provided with an angle adjustment mechanism for driving the rotating plate to rotate so as to adjust the angle of the rotating plate; The angle adjustment mechanism includes an adjusting motor fixedly mounted on the sliding plate, and a connecting rod mechanism is provided between the output shaft of the adjusting motor and the rotating plate; the connecting rod mechanism includes a first connecting rod and a second connecting rod, the first connecting rod rotates synchronously with the output shaft of the adjusting motor, and the two ends of the second connecting rod are respectively hingedly connected to the first connecting rod and the rotating plate.

2. The tail diffuser for wind tunnel testing according to claim 1, characterized in that: A hinge is arranged between the sliding plate and the rotating plate.

3. The tail diffuser for wind tunnel testing according to claim 1, characterized in that: The output shaft of the adjusting motor is parallel to the rotating shaft.

4. The tail diffuser for wind tunnel testing according to any one of claims 1 to 3, characterized in that: The angle adjustment mechanisms are provided in two numbers, and the two angle adjustment mechanisms are symmetrically arranged between the sliding plate and two ends of the rotating plate.

5. A car model, characterized in that: It comprises a chassis, a rear diffuser for wind tunnel test as claimed in any one of claims 1 to 4 is installed at the rear of the chassis, and the rotating shaft is located in the width direction of the chassis.

6. The automobile model according to claim 5, characterized in that: The chassis is provided with a sliding drive mechanism for driving the sliding plate to move along a direction perpendicular to the rotating shaft.

7. The automobile model according to claim 6, characterized in that: The sliding drive mechanism comprises an electric push rod, an outer sleeve of the electric push rod is fixedly connected to the chassis, and a push-pull rod of the electric push rod is connected to the sliding plate.

8. The automobile model according to claim 7, characterized in that: A fixing bracket is arranged on the chassis, and the outer sleeve of the electric push rod is fixedly mounted on the fixing bracket.

9. The automobile model according to claim 7, characterized in that: There are two electric push rods, and the two electric push rods are symmetrically arranged at two ends of the sliding plate.

10. The automobile model according to claim 5, characterized in that: The sliding plate is parallel to the bottom chassis.

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