CN115158158A - Automobile horn and bracket matching method - Google Patents

Abstract

The invention discloses a matching method of an automobile horn and a bracket, which comprises the following steps: s1, avoiding the excitation direction of a horn and the sensitive direction of a vehicle body mounting point; and S2, matching and mounting the bracket and the vehicle body. According to the automobile horn and the bracket matching method, vibration caused by the operation of the horn is reduced by performing frequency avoiding matching on the mounting point of the horn, the bracket and the automobile body.

Description

Automobile horn and bracket matching method

Technical Field

The invention belongs to the field of automobile horn frequency matching, and particularly relates to an automobile horn based on vibration-avoiding and frequency-avoiding design and a bracket matching method.

Background

Vehicle body, pedal, steering wheel and other shakes caused by the operation of the automobile horn are common NVH problems and are important factors for evaluating the comfort of the automobile. Generally, the main causes of car horns causing jitter are: 1. the mounting bracket of the automobile horn fails to effectively isolate the excitation of the horn; 2. the excitation frequency and the sensitive area of the car body cannot be effectively avoided.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an automobile horn and a bracket matching method, and aims to reduce vibration caused by the operation of the horn.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the automobile horn and bracket matching method comprises the following steps:

s1, avoiding the excitation direction of a horn and the sensitive direction of a vehicle body mounting point;

and S2, matching and mounting the bracket and the vehicle body.

The step S1 includes:

s101, confirming the excitation direction of the loudspeaker;

s102, setting the force transmission direction of the support.

In step S101, the excitation direction of the horn is a normal direction of the largest cross section where the horn basin is located.

In step S102, the force transmission direction between the bracket and the vehicle body attachment point and the excitation direction of the horn are avoided.

In the step S102, an included angle between a force transmission direction of the bracket and the vehicle body mounting point and an excitation direction of the horn is 90 degrees.

The step S2 includes:

s201, identifying an excitation frequency curve of a system where the horn and the bracket are located when the horn works, and setting the excitation frequency curve as a first curve;

s202, identifying an original point dynamic stiffness curve of a vehicle body mounting point, and setting the original point dynamic stiffness curve as a second curve;

s203, matching the first curve with the second curve;

and S204, selecting a vehicle body mounting point.

In step S203, the frequency corresponding to the peak of the first curve does not correspond to the valley frequency of the second curve.

In step S203, the frequency bandwidth is set according to the half-power bandwidth interval.

In step S202, the horn and the bracket need to be removed during testing.

According to the automobile horn and the bracket matching method, vibration caused by the operation of the horn is reduced by performing frequency avoiding matching on the mounting point of the horn, the bracket and the automobile body.

Drawings

FIG. 1 is a schematic diagram of the basic structure of a horn;

FIG. 2 is a schematic view of the main excitation direction of the horn and the main direction of the mounting point of the bracket to the vehicle body;

FIG. 3 is a schematic diagram of a system excitation curve;

FIG. 4 is a schematic view of a dynamic stiffness curve;

FIG. 5 is a schematic view of the installation point transfer excitation direction;

the labels in the above figures are: 1. a horn; 2. a support; 3. a vehicle body mounting point; 4. a first measuring point; 5. a first curve; 6. a second measuring point; 7. a second curve; 8. the dynamic stiffness curve corresponds to a valley value; 8. a horn actuation direction; 9. the force transmission direction of the bracket and the installation point of the car body; 10. along the direction of high rigidity; 11. along the direction of small rigidity; 12. in the direction of less stiffness.

Detailed Description

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "up", "down", and the like are used herein for descriptive purposes only.

It should be noted that, in the following embodiments, the "first" and "second" do not represent an absolute distinction relationship in structure and/or function, nor represent a sequential execution order, but merely for convenience of description.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the use of such term knowledge in the specification of the invention is for the purpose of describing particular embodiments and is not intended to be limiting of the invention, and the use of the term "and/or" herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the invention provides a matching method of an automobile horn and a bracket, which comprises the following steps:

s1, avoiding the excitation direction of a horn and the sensitive direction of a vehicle body mounting point;

and S2, matching and mounting the bracket and the vehicle body.

Specifically, a vehicle horn and bracket matching method based on vibration and frequency avoidance design is provided: and frequency avoiding matching is carried out on the mounting points of the horn, the bracket and the vehicle body.

1. The bracket-horn is designed to avoid the main excitation (vibration in the direction of the horn basin) of the horn and the sensitive direction of a mounting point by designing the force transmission direction of the bracket;

2. and (horn + bracket) -vehicle body mounting point, recognizing the main excitation frequency of the (horn + bracket), recognizing the sensitive frequency of the vehicle body mounting point, and performing frequency avoiding matching on the two.

As shown in FIG. 1, the vehicle horn is mounted on a bracket mounted on the vehicle body.

The step S1 includes:

s101, confirming the excitation direction of the horn;

s102, setting the force transmission direction of the support.

In the above step S101, the excitation direction of the horn is generally normal to the largest cross section of the horn basin, and can also be determined through testing.

As shown in fig. 2, in step S102, the force transmission direction between the bracket and the vehicle body attachment point and the excitation direction of the horn are avoided. Preferably, an included angle between a force transmission direction of the bracket and a vehicle body mounting point and an excitation direction of the horn is 90 degrees, at the moment, excitation transmitted by the horn to the mounting point is the minimum, and the vehicle body mounting point is a connecting point of the bracket and a vehicle body.

The step S2 includes:

s201, identifying an excitation frequency curve of a system where the horn and the bracket are located when the horn works, and setting the excitation frequency curve as a first curve;

s202, identifying a dynamic stiffness curve of a vehicle body mounting point, and setting the curve as a second curve;

s203, matching the first curve with the second curve;

and S204, selecting a vehicle body mounting point.

In step S202, the horn and the bracket are removed during the test, that is, the bracket is not mounted on the vehicle body.

As shown in fig. 4, in the step S203, when performing matching, it is necessary that the frequency corresponding to the peak of the first curve does not correspond to the valley frequency of the second curve. The frequency bandwidth is set according to a half-power bandwidth interval.

The present invention has been described in detail with reference to the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, and that various insubstantial modifications of the inventive concepts and solutions, or their direct application to other applications without modification, are intended to be covered by the scope of the invention.

Claims (9)

1. The automobile horn and bracket matching method is characterized by comprising the following steps:

s1, avoiding the excitation direction of a horn and the sensitive direction of a vehicle body mounting point;

and S2, matching and mounting the bracket and the vehicle body.

2. The automobile horn and bracket matching method according to claim 1, wherein the step S1 comprises:

s101, confirming the excitation direction of the loudspeaker;

s102, setting the force transmission direction of the support.

3. The automobile horn and bracket matching method according to claim 2, wherein in the step S101, the excitation direction of the horn is a normal direction of a largest cross section where a horn basin is located.

4. The automobile horn and bracket matching method according to claim 2, wherein in step S102, a force transmission direction of the bracket and body mounting point and an excitation direction of the horn are avoided.

5. The automobile horn and bracket matching method according to claim 4, wherein in the step S102, an included angle between a force transmission direction of the bracket and a vehicle body mounting point and an excitation direction of the horn is 90 degrees.

6. The automobile horn and bracket matching method according to any one of claims 1 to 5, wherein the step S2 comprises:

s201, identifying an excitation frequency curve of a system where the horn and the bracket are located when the horn works, and setting the excitation frequency curve as a first curve;

s202, identifying an original point dynamic stiffness curve of a vehicle body mounting point, and setting the original point dynamic stiffness curve as a second curve;

s203, matching the first curve with the second curve;

and S204, selecting a vehicle body mounting point.

7. The method as claimed in claim 6, wherein in step S203, the frequency corresponding to the peak of the first curve does not correspond to the valley frequency of the second curve.

8. The automobile horn and bracket matching method according to claim 7, wherein in the step S203, the frequency bandwidth is set according to a half-power bandwidth interval.

9. The method as claimed in claim 6, wherein in step S202, the horn and the bracket are removed during the test.

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