CN213544819U

CN213544819U - Ultrasonic sensor shell structure

Info

Publication number: CN213544819U
Application number: CN202022659922.7U
Authority: CN
Inventors: 宋福宇; 骆军; 何金
Original assignee: Chengdu Huitong West Electronic Co ltd
Current assignee: Chengdu Huitong West Electronic Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-06-25
Anticipated expiration: 2030-11-17

Abstract

The utility model discloses an ultrasonic sensor shell structure belongs to automobile-used sensor technical field. This shell structure includes: the lower shell is in a bottom cylinder shape, and a vibration area is arranged in the lower shell; the support ring is arranged on the inner side wall of the lower shell; the upper shell is provided with a through cavity, the upper shell is tightly matched on the lower shell, and the bottom end of the upper shell is arranged close to the support ring. The utility model provides an ultrasonic sensor shell structure through the sensor housing with original integrative design, has divided into 3 parts to through structural improvement, realized that the upper casing does not vibrate or the vibration is minimum, so the energy is not by dissipation or dissipation minimum, so vibration energy is concentrated in the casing bottom promptly shell body down, and the energy has heightened test distance just far, finally can reach the test distance of automatic parking more than 5 meters.

Description

Ultrasonic sensor shell structure

Technical Field

The utility model relates to a vehicle sensor technical field, more specifically the utility model relates to an ultrasonic sensor shell structure is related to.

Background

An ultrasonic sensor is a sensor that converts an ultrasonic signal into another energy signal (typically an electrical signal). Ultrasonic waves are mechanical waves with a vibration frequency higher than 20 kHz. It has the features of high frequency, short wavelength, less diffraction, high directivity, directional propagation, etc. The penetration of ultrasonic waves into liquids and solids is great, especially in sunlight-opaque solids. Ultrasonic waves hitting impurities or interfaces can generate significant reflection to form reflection echoes, and hitting moving objects can generate Doppler effect.

Based on the characteristics, the ultrasonic sensor is widely applied to automobile parking, but most of the shells of the existing automobile ultrasonic sensors are made of aluminum alloy and have an integrally-formed smooth side wall structure, and the whole shells are made of the same aluminum alloy. Under the working state, the bottom of the aluminum shell starts to vibrate when working, the upper part of the aluminum alloy shell also vibrates along with the transmission of the vibration to the upper part of the aluminum alloy, and the vibration of the upper part dissipates part of energy, so that the whole energy is weakened. Therefore, the conventional testing distance of about 2 meters can be realized. Simultaneously because the outside lateral wall vibration of aluminum alloy has increaseed the both sides of sensor main angle, so whole sensor angle is great, easily causes to install on the car back because of the great ground detection of angle leads to the sensor misjudgement. The functions of the automobile parking device are limited, and the automobile parking device is not ideal particularly when being applied to automobiles. Automatic parking requires that the ultrasonic sensor can detect distances of more than 5 meters.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultrasonic sensor shell structure to above-mentioned technical problem is solved in hope.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an ultrasonic sensor housing structure comprising: the lower shell is in a bottom cylinder shape, and a vibration area is arranged in the lower shell; the support ring is arranged on the inner side wall of the lower shell; the upper shell is provided with a through cavity, the upper shell is tightly matched on the lower shell, and the bottom end of the upper shell is arranged close to the support ring.

Furthermore, a limiting step is arranged on the inner wall of the top of the lower shell, and the supporting ring is embedded in the limiting step.

Furthermore, the inner wall of the bottom of the upper shell is provided with a close fit boss, and the upper shell is in close fit with the lower shell through the close fit boss and the limit step.

Further, glue is coated or not coated at the position of the limiting step.

Further, the glue is resin glue.

Further, the upper shell and the lower shell are both made of plastic or metal materials.

Furthermore, the metal materials used by the upper shell and the lower shell are aluminum alloys.

Further, the support ring is made of a metal material, and the thickness of the support ring is 1.0mm-6.0 mm.

Further, the metal material is stainless steel.

Furthermore, the outer diameter of the upper shell is the same as that of the lower shell, and a boss capable of positioning the sensor is arranged at the top of the upper shell.

Compared with the prior art, the utility model beneficial effect who has is:

the utility model discloses novel structure, the practicality is strong. The utility model provides an ultrasonic sensor shell structure through the sensor housing with original integrative design, has divided into 3 parts to through structural improvement, realized that the upper casing does not vibrate or the vibration is minimum, so the energy is not by dissipation or dissipation minimum, so vibration energy is concentrated in the casing bottom promptly shell body down, and the energy has heightened test distance just far, finally can reach the test distance of automatic parking more than 5 meters.

Drawings

Fig. 1 is a schematic structural diagram of a housing structure of an ultrasonic sensor according to the present invention.

The labels in the figure are: 1-upper shell, 2-support ring, 3-lower shell, 4-boss, 5-tight fit boss, and 6-limit step.

Detailed Description

The present invention will be further described with reference to the following examples, which are only some, but not all, of the examples of the present invention. Based on the embodiments in the present invention, other embodiments used by those skilled in the art without creative work belong to the protection scope of the present invention.

Example 1:

as shown in fig. 1, an ultrasonic sensor housing structure includes: the piezoelectric device comprises a lower shell 3, a support ring 2 and an upper shell 1, wherein the lower shell 3 is in a bottom cylinder shape, and a vibration area (after a piezoelectric device is adhered to the vibration area) is arranged in the lower shell 3; the support ring 2 is arranged on the inner side wall of the lower shell 3; the upper shell 1 is provided with a through cavity, the upper shell 1 is tightly matched on the lower shell 3, and the bottom end of the upper shell 1 is arranged close to the support ring 2.

Go up the casing 1 in the embedding to the inside wall of inferior valve for go up casing 1 and casing 3 tight fit realize a complete shell structure down. The outer diameter of the upper shell 1 is the same as that of the lower shell 3, so that the outer shapes of the upper shell 1 and the lower shell 3 are not different from the integrally formed structure after being connected, and the assembly is not influenced.

The lower shell 3 is made of plastic, aluminum alloy, copper, stainless steel and the like, preferably aluminum alloy, while the middle support ring 2 is made of aluminum alloy, copper, stainless steel and other metal materials, preferably stainless steel, and the thickness of the support ring 2 is 1.0mm-6.0 mm. The upper shell 1 is made of plastic and metal, and aluminum alloy is preferred. The upper shell 1 has a boss 4 capable of positioning a sensor and having a certain thickness.

In this embodiment, a limiting step 6 is disposed on the inner wall of the top of the lower housing 3, and the support ring 2 is embedded in the limiting step 6. Glue can be coated or not coated at the position of the limit step 6 according to the functional requirements of the user. The glue is preferably a resin glue. Different sound field angles are achieved.

Be equipped with close-fitting boss 5 on the bottom inner wall of last casing 1, go up casing 1 and realize with lower casing 3's close-fitting through the close-fitting of close-fitting boss 5 with spacing step 6. The connecting positions of the upper shell 1, the support ring 2 and the lower shell 3 are all annular, so that the three can be in interference fit with each other through the side wall to realize fixed connection.

By the utility model discloses ultrasonic sensor that ultrasonic sensor shell structure was made, at the during operation: the bottom of the shell starts to vibrate when working, when vibration is transmitted from the lower shell 3 to the upper shell 1, namely, the vibration is transmitted to the other component, the middle support ring 2 and the side wall are in interference fit to forcibly support the side wall, and the vibration is blocked at the joint position of the middle support ring 2 and the side wall and cannot be continuously transmitted to the upper shell 1.

The advantage that brings like this is that, upper casing 1 does not carry out the vibration or the vibration is minimum, so the energy is not dissipated or the dissipation is minimum, so the vibration energy is concentrated in lower casing 3, the bottom of shell body, and the energy is higher the test distance just far away, can reach automatic parking 5 meters more than test distance finally.

Meanwhile, the vibration of the side wall is only the side wall part of the lower shell 3, the vibration area of the side wall is reduced by more than half, and the main angle of the sensor is not increased, so that the integral angle of the sensor is smaller. After the angle is small, the ground detection can not occur at the test distance of more than 5 meters.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An ultrasonic sensor housing structure, comprising:

the lower shell is in a bottom cylinder shape, and a vibration area is arranged in the lower shell;

the support ring is arranged on the inner side wall of the lower shell;

the upper shell is provided with a through cavity, the upper shell is tightly matched on the lower shell, and the bottom end of the upper shell is arranged close to the support ring.

2. The ultrasonic sensor housing structure of claim 1, wherein the top inner wall of the lower housing has a limiting step, and the support ring is embedded in the limiting step.

3. The ultrasonic sensor shell structure of claim 1, wherein the inner wall of the bottom of the upper shell is provided with a close-fit boss, and the upper shell is tightly fitted with the lower shell through the close-fit boss and the limit step.

4. The ultrasonic sensor housing structure of claim 2, wherein the limiting step is coated or not coated with glue.

5. An ultrasonic sensor housing structure according to claim 4, wherein the glue is a resin glue.

6. The ultrasonic sensor housing structure according to claim 1, wherein the upper case and the lower case are made of a plastic or metal material.

7. The ultrasonic sensor housing structure according to claim 6, wherein the metal material used for the upper case and the lower case is aluminum alloy.

8. The housing structure for ultrasonic sensor according to claim 1, wherein said support ring is made of a metal material, and the thickness of said support ring is 1.0mm to 6.0 mm.

9. An ultrasonic sensor housing structure according to claim 8, wherein the metal material is stainless steel.

10. The ultrasonic sensor housing structure according to claim 1, wherein the outer diameter of the upper case and the outer diameter of the lower case are the same, and a boss capable of positioning the sensor is provided on the top of the upper case.