CN219715741U - Radar sensor - Google Patents

Abstract

The utility model discloses a radar sensor in the technical field of sensors, and aims to solve the problems that in the prior art, a decoupling ring is usually composed of an inner decoupling ring and an outer decoupling ring, a resonator needs to be extruded when being fixed, the resonator easily falls off in the transportation and assembly processes, and the water inlet phenomenon of the resonator easily occurs in rainy days and the like. The sensor comprises a sensor base and a decoupling ring, wherein a base is arranged on the sensor base, the outer wall of the base is detachably connected with a cover body, the decoupling ring comprises a main body and an annular block sleeved on the periphery of the main body, and the main body and the annular block are coaxially arranged; the cavity matched with the resonator is arranged at the top of the main body, and the resonator is detachably connected with the cavity through a limiting mechanism. According to the utility model, the decoupling ring is not required to be extruded and fixed through the bumper bracket, and the main body is an integral body, so that the decoupling ring is not easy to fall off, the decoupling ring is not contacted with the bumper bracket, and the influence of extrusion on the resonator is reduced.

Description

Radar sensor

Technical Field

The utility model relates to a radar sensor, and belongs to the technical field of sensors.

Background

It is known to mount an ultrasonic sensor in the front or rear bumper of a vehicle, with which the surrounding situation of the vehicle can be grasped and at the same time detected surrounding information of the driver assistance device can be provided. To prevent the transmission of bumper vibrations to the ultrasonic sensor, a decoupling ring, typically of elastomeric material, typically silicone, is typically mounted to the ultrasonic sensor. Typically this decoupling ring surrounds the membrane cavity resonator of the ultrasonic sensor and simultaneously serves to seal the membrane cavity resonator from water ingress. Since the decoupling ring is generally not permanently and firmly connected to the diaphragm cavity resonator, it is necessary to firmly fix the decoupling ring to the ultrasonic sensor.

The decoupling rings in the prior art are generally composed of an inner decoupling ring and an outer decoupling ring, the inner decoupling ring and the outer decoupling ring are fixed through supporting elements which are arranged at intervals and a bumper, the bumper is used for fixing, the decoupling rings are necessarily extruded by the bumper when the bumper extrudes the elements which are arranged at intervals, so that the resonator is extruded further, the normal operation of the resonator is easy to be influenced, meanwhile, the decoupling rings in the prior art are sleeved and are easy to fall off in the transportation and assembly process, the inner decoupling ring and the outer decoupling ring in the decoupling rings are mutually separated, the resonator cannot be completely surrounded during installation, sealing work of the resonator is difficult, and water inflow phenomenon of the resonator is easy to occur in rainy weather and the like, so that the using effect of the device is influenced.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides a radar sensor which solves the problems that a decoupling ring in the prior art is generally composed of an inner decoupling ring and an outer decoupling ring, a resonator needs to be extruded during fixing, the normal operation of the resonator is easy to be influenced, the decoupling ring adopts an outer sleeve type, the decoupling ring is easy to fall off in the transportation and assembly processes, the decoupling ring cannot completely surround the resonator, the resonator is difficult to seal, and the resonator is easy to enter water in rainy weather.

In order to solve the technical problems, the utility model is realized by adopting the following technical scheme:

the utility model provides a radar sensor, which comprises a sensor base and a decoupling ring, wherein a base is arranged on the sensor base, a cover body is detachably connected to the outer wall of the base, the decoupling ring comprises a main body and an annular block sleeved on the periphery of the main body, and the main body and the annular block are coaxially arranged;

the top of the main body is provided with a cavity matched with the resonator, and the resonator is detachably connected with the cavity through a limiting mechanism;

during installation, the annular block is located between the base and the cover body, and the base is matched with the cover body and used for limiting the annular block.

Further, the inner wall of the base is provided with a limiting block, and the outer wall of the main body is provided with a limiting groove matched with the limiting block.

Further, the body and the annular block are integrally formed.

Further, the body and the annular block are both of an elastic material.

Further, the limiting mechanism comprises a protruding block arranged on the periphery of the resonator, a groove matched with the protruding block is formed in the inner wall of the cavity, and the protruding block is matched with the groove and used for fixing the positions of the cavity and the resonator;

the height of the cavity is larger than that of the resonator, the cavity is cylindrical, and the cavity can completely surround the side wall of the resonator when the lug is positioned in the groove.

Further, an elastic ring is integrally connected to the periphery of the main body below the annular block, the outer diameter of the elastic ring is smaller than the inner diameter of the base, and the diameter of the cavity is smaller than the diameter of the resonator;

when the resonator is detachably connected to the inside of the cavity, the resonator can push the elastic ring to be attached to the inner wall of the base.

Further, the bottom of the main body is integrally connected with an annular bulge, and the bottom of the inner side of the base is provided with an annular groove matched with the annular bulge;

when the annular bulge is installed, the annular bulge is positioned on the inner side of the annular groove and is used for sealing the base and the main body.

Further, a damping mechanism is arranged on one side of the outer wall of the cover body, which is close to the free end of the cover body.

Further, a through hole for placing sound absorbing cotton is formed in the bottom of the main body, the through hole is communicated with the cavity, the sound absorbing cotton is detachably connected with the resonator, and the diameter of the through hole is smaller than that of the cavity.

Further, a clamping ring is arranged on the periphery of the base, and a clamping groove matched with the clamping ring is formed in the inner side of the cover body.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the radar sensor, the resonator is firstly arranged in the main body through the cooperation of the main body, the annular block and the cover body, then the main body is placed on the inner side of the base, the positions of the annular block are limited through the cooperation of the cover body and the base, so that the positions of the main body and the sensor base are fixed, the positions of the resonator and the sensor base are fixed, the decoupling ring is not required to be extruded and fixed through the bumper bracket, the main body is integrated and fixedly connected with the annular block, the decoupling ring is not easy to fall off in the transportation and assembly processes, the decoupling ring is not contacted with the bumper bracket, the influence of extrusion on the resonator is reduced, and the working effect of the device is ensured;

2. according to the utility model, the main body and the annular block are integrally formed, when the resonator is fixed in the main body, the cavity is tightly attached to the resonator, so that water is prevented from entering the cavity, and the tightness of the device is ensured; the main body and the annular block are integrally formed, and the annular block is fixed by the cover body and the base after the installation is completed, so that the decoupling ring is prevented from falling off, and the using effect of the device is ensured; after the whole installation of the device is finished, the main body and the annular block are integrally formed, so that the sealing effect between the base and the decoupling ring is ensured, water is prevented from entering the space between the base and the decoupling ring in rainy days, and the stability of the device in operation is ensured;

3. the height of the cavity is larger than that of the resonator, when the bottom of the resonator is contacted with the bottom of the inner side of the main body, the cavity can completely surround the side part of the resonator, the resonator is better protected, the diameter of the through hole is smaller than that of the resonator, so that the bottom of the main body can surround the resonator, and the main body is hollow and cylindrical and is matched with sound-absorbing cotton, the resonator can be protected from the bottom and the side part, and the influence of clutter on the resonator is reduced;

4. the diameter of the cavity is smaller than that of the resonator, so that the resonator can push the main body to elastically deform outwards when in the main body, and the main body drives the elastic ring to elastically deform outwards, so that the diameter of the elastic ring is increased, the elastic ring is attached to the inner wall of the base, the base and the main body are matched for further sealing, water is prevented from entering the base when in rainy days, and the stability of the device when in operation is ensured;

5. when the sensor base cannot be completely fixed on the bumper support, the damping mechanism can be arranged on the outer wall of the cover body, the damping mechanism is positioned between the cover body and the bumper support, the sensor base is extruded and fixed through the bumper support, the extrusion influence of the bumper support on the resonator is reduced, and the working stability of the device is ensured.

Drawings

Fig. 1 is a schematic view of an explosion structure of a radar sensor according to an embodiment of the present utility model;

fig. 2 is a schematic perspective view of a radar sensor according to an embodiment of the present utility model when the installation is completed;

fig. 3 is a schematic front view in cross section of a decoupling ring according to an embodiment of the present utility model when a resonator is installed;

fig. 4 is a schematic front view in cross section of a decoupling ring provided according to an embodiment of the present utility model without a resonator installed;

FIG. 5 is a schematic cross-sectional front view of a cover provided in accordance with an embodiment of the present utility model when a shock absorbing mechanism is installed;

FIG. 6 is a schematic view of an explosion structure of a radar sensor according to an embodiment of the present utility model when a damping mechanism is installed;

fig. 7 is a schematic perspective view of a decoupling ring according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of a front view structure of a decoupling ring according to an embodiment of the present utility model;

fig. 9 is a schematic perspective view of another angle of a decoupling ring according to an embodiment of the present utility model.

In the figure: 1. a sensor base; 2. a decoupling ring; 21. a main body; 22. an annular block; 3. a base; 4. a cover body; 5. a resonator; 6. a cavity; 7. a limit groove; 8. a limiting block; 9. a bump; 10. a groove; 11. sound absorbing cotton; 12. a damping mechanism; 13. a through hole; 14. an elastic ring; 15. an annular protrusion; 16. an annular groove.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1-4, the utility model provides a radar sensor, which comprises a sensor base 1 and a decoupling ring 2, wherein a base 3 is arranged on the sensor base 1, a cover body 4 is detachably connected to the outer wall of the base 3, the decoupling ring 2 comprises a main body 21 and an annular block 22 sleeved on the periphery of the main body 21, and the main body 21 and the annular block 22 are coaxially arranged; a cavity 6 matched with the resonator 5 is formed in the top of the main body 21, and the resonator 5 and the cavity 6 are detachably connected through a limiting mechanism; when the device is installed, the annular block 22 is positioned between the base 3 and the cover body 4, and the base 3 is matched with the cover body 4 and used for limiting the annular block 22; the through hole 13 for placing the sound absorbing cotton 11 is formed in the bottom of the main body 21, the through hole 13 is communicated with the cavity 6, the sound absorbing cotton 11 is detachably connected with the resonator 5, and the diameter of the through hole 13 is smaller than that of the cavity 6.

Specifically, when the installation work is performed, the resonator 5 is fixed in the cavity 6 through the limiting mechanism, when the resonator 5 is fixed in the cavity 6, the side wall of the resonator 5 is tightly combined with the inner wall of the cavity 6, so that water is prevented from entering the cavity 6 in rainy days, the decoupling ring 2 is placed on the sensor base 1 and is placed on the inner side of the base 3, when the bottom of the main body 21 is jointed with the bottom of the inner side of the base 3, the bottom of the annular block 22 is jointed with the top of the base 3, the cover 4 is installed on the outer wall of the base 3, when the cover 4 is jointed with the top of the annular block 22 after the installation of the base 3 is completed, the cover 4 is jointed with the upper side and the lower side of the annular block 22 respectively, and the cover 4 is matched with the base 3 to fix the positions of the annular block 22, so that the positions of the base 3 and the main body 21 are fixed, and the installation work of the whole device is completed; optionally, when the resonator 5 is installed in the cavity 6, the sound absorbing cotton 11 is placed in the through hole 13, and the sound absorbing cotton 11 is bonded with the resonator 5 through glue, and because the diameter of the through hole 13 is smaller than that of the resonator 5, the bottom and the side of the main body 21 surround the resonator 5 and are matched with the sound absorbing cotton 11, the resonator 5 can be protected from the bottom and the side, thereby reducing the influence of clutter on the resonator 5, and ensuring the working effect of the device.

According to the utility model, the resonator 5 is firstly arranged in the main body 21 through the matching of the main body 21, the annular block 22 and the cover body 4, then the main body 21 is placed on the inner side of the base 3, the cover body 4 is matched with the base 3, and the position of the annular block 22 is limited, so that the positions of the main body 21 and the sensor base 1 are fixed, the positions of the resonator 5 and the sensor base 1 are fixed, the decoupling ring 2 is not required to be extruded and fixed through a bumper bracket, and the main body 21 is an integral body and is fixedly connected with the annular block 22, so that the decoupling ring 2 is not easy to fall off in the transportation and assembly processes, the decoupling ring 2 is not contacted with the bumper bracket, the influence of extrusion on the resonator 5 is reduced, and the working effect of the device is ensured.

In one embodiment, as shown in fig. 1 and fig. 7-9, a limiting block 8 is disposed on the inner wall of the base 3, and a limiting groove 7 matched with the limiting block 8 is formed on the outer wall of the main body 21.

Specifically, when the main body 21 needs to be placed, after the positions of the limiting block 8 and the limiting groove 7 are aligned, the main body 21 is placed on the inner side of the base 3, at the moment, the limiting block 8 is positioned in the limiting groove 7, and the limiting block 8 and the base 3 are matched, so that the relative rotation between the main body 21 and the base 3 is limited, the resonator 5 is prevented from rotating during working, and the working stability of the device is ensured; optionally, the limiting groove 7 penetrates the annular block 22 and the elastic ring 14 and extends to the bottom of the outer wall of the main body 21.

In one embodiment, as shown in fig. 1, 3-4 and 7-9, the body 21 and the annular block 22 are integrally formed.

Specifically, when the resonator 5 is fixed in the main body 21, the main body 21 is an integral body, so that the cavity 6 is tightly attached to the resonator 5, water is prevented from entering the cavity 6, and the tightness of the device is ensured; the main body 21 and the annular block 22 are integrally formed, and the annular block 22 is fixed by the cover body 4 and the base 3 after the installation is completed, so that the main body 21 is prevented from falling off in the transportation and assembly processes, the decoupling ring 2 is prevented from falling off, and the using effect of the device is ensured; after the device is integrally installed, the main body 21 and the annular block 22 are integrally formed, and the base 3 and the cover body 4 are matched to clamp two sides of the annular block 22, so that the sealing effect between the base 3 and the decoupling ring 2 is guaranteed, water is prevented from entering the space between the base 3 and the decoupling ring 2 in rainy days, and the stability of the device in operation is guaranteed.

3-4, the main body 21 and the annular block 22 are made of elastic materials, the limiting mechanism comprises a bump 9 arranged at the periphery of the resonator 5, a groove 10 matched with the bump 9 is formed in the inner wall of the cavity 6, and the bump 9 is matched with the groove 10 and used for fixing the positions of the cavity 6 and the resonator 5; the height of the cavity 6 is larger than the height of the resonator 5, the cavity 6 is cylindrical, and the cavity 6 can completely surround the side wall of the resonator 5 when the bump 9 is located inside the groove 10.

Specifically, the main body 21 and the annular block 22 are made of elastic materials, when the resonator 5 is required to be fixed in the cavity 6, after the positions of the lug 9 and the groove 10 are aligned, the resonator 5 is plugged into the cavity 6 from above the main body 21, the lug 9 moves along with the resonator 5, when the lug 9 moves in the main body 21, the position of the main body 21 on one side of the lug 9 is elastically deformed, when the lug 9 passes by one side of the annular block 22, the annular block 22 is elastically deformed, the movement of the lug 9 is prevented from being influenced, when the bottom of the resonator 5 contacts with the inner bottom of the main body 21, the placement of the resonator 5 is completed, at the moment, the lug 9 moves into the groove 10, the main body 21 is restored to be in the same state, the lug 9 is matched with the groove 10, the resonator 5 is fixed in the interior of the decoupling ring 2, and because the height of the cavity 6 is larger than the height of the resonator 5, when the bottom of the resonator 5 contacts with the inner bottom of the main body 21, the cavity 6 can completely surround the side wall of the resonator 5, and better protection and sealing functions are achieved for the resonator 5; alternatively, the cavity 6 is cylindrical, so that the body 21 is hollow cylindrical and matches the shape of the resonator 5; alternatively, the body 21 and the annular block 22 are made of a silicone material.

1-4 and 7-9, an elastic ring 14 is integrally connected to the periphery of the main body 21 below the annular block 22, the outer diameter of the elastic ring 14 is smaller than the inner diameter of the base 3, and the diameter of the cavity 6 is smaller than the diameter of the resonator 5; when the resonator 5 is detachably connected to the inside of the cavity 6, the resonator 5 can push the elastic ring 14 to be attached to the inner wall of the base 3.

When the resonator 5 is not placed in the main body 21 in use, the elastic ring 14 is not contacted with the inner wall of the base 3, so that the main body 21 is convenient to be taken out of the base 3; when the resonator 5 is placed in the main body 21, the diameter of the cavity 6 is smaller than that of the resonator 5, so that the resonator 5 can push the main body 21 to elastically deform outwards when in the main body 21, the main body 21 drives the elastic ring 14 to elastically deform outwards, the diameter of the elastic ring 14 is increased, the elastic ring 14 is attached to the inner wall of the base 3, the base 3 and the main body 21 are further sealed by matching the elastic ring 14 with the inner wall of the base 3, water is prevented from entering the base 3 when in rainy days, the stability of the device when in operation is ensured, and the positions of the base 3 and the main body 21 are further fixed; optionally, the elastic ring 14 is made of silica gel; meanwhile, since the diameter of the cavity 6 is smaller than that of the resonator 5, when the resonator 5 is placed inside the cavity 6, the main body 21 is required to be elastically deformed, and the two are mutually pressed, so that the sealing effect between the cavity 6 and the resonator 5 is further ensured.

3-4, the bottom of the main body 21 is integrally connected with an annular protrusion 15, and the bottom of the inner side of the base 3 is provided with an annular groove 16 matched with the annular protrusion 15; the annular projection 15 is located inside the annular groove 16 when installed, for sealing the base 3 and the body 21.

Specifically, when main part 21 is placed in the inboard of base 3, and the bottom of main part 21 contacts with the inboard bottom of base 3, and annular bulge 15 is located the inside of ring channel 16, and after base 3 and lid 4 detachable connection, fix the position of annular bulge 15 and ring channel 16, the cooperation of both plays further sealed effect to base 3 and decoupling ring 2, has guaranteed the stability of device during operation.

5-6, when the sensor base 1 cannot be completely fixed on the bumper bracket in use, the damping mechanism 12 can be installed on the outer wall of the cover 4, the damping mechanism 12 is located between the cover 4 and the bumper bracket, the sensor base 1 is extruded and fixed through the bumper bracket, and the extrusion influence of the bumper bracket on the resonator 5 is reduced through the damping mechanism 12, so that the working stability of the device is ensured; alternatively, the damping mechanism 12 may be an annular rubber block, or a plurality of discrete rubber blocks; optionally, the cover 4 is manufactured by a two-shot molding technique.

In one embodiment, as shown in fig. 3-4, a snap ring is arranged on the periphery of the base 3, and a clamping groove matched with the snap ring is arranged on the inner side of the cover body 4.

Specifically, when the relative positions of the base 3 and the cover 4 need to be fixed, the cover 4 is sleeved on the outer side of the base 3 and is pushed to approach each other, the contact position of the cover 4 and the clamping ring is elastically deformed, when the bottom of the cover 4 is attached to the outer wall of the base 3, the clamping ring is positioned in the clamping groove, the cover 4 is restored to the original state, and the two are matched to fix the relative positions of the base 3 and the cover 4; optionally, the cover 4 is made of plastic.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims (10)

1. The radar sensor is characterized by comprising a sensor base (1) and a decoupling ring (2), wherein a base (3) is arranged on the sensor base (1), a cover body (4) is detachably connected to the outer wall of the base (3), the decoupling ring (2) comprises a main body (21) and an annular block (22) sleeved on the periphery of the main body (21), and the main body (21) and the annular block (22) are coaxially arranged;

a cavity (6) matched with the resonator (5) is formed in the top of the main body (21), and the resonator (5) is detachably connected with the cavity (6) through a limiting mechanism;

when the device is installed, the annular block (22) is located between the base (3) and the cover body (4), and the base (3) is matched with the cover body (4) and used for limiting the annular block (22).

2. The radar sensor according to claim 1, characterized in that the inner wall of the base (3) is provided with a limiting block (8), and the outer wall of the main body (21) is provided with a limiting groove (7) matched with the limiting block (8).

3. The radar sensor according to claim 1, characterized in that the body (21) and the annular block (22) are integrally formed.

4. The radar sensor according to claim 1, characterized in that the body (21) and the annular block (22) are both of an elastic material.

5. The radar sensor according to claim 4, wherein the limiting mechanism comprises a protruding block (9) arranged at the periphery of the resonator (5), a groove (10) matched with the protruding block (9) is formed in the inner wall of the cavity (6), and the protruding block (9) is matched with the groove (10) and used for fixing the positions of the cavity (6) and the resonator (5);

the height of the cavity (6) is larger than that of the resonator (5), the cavity (6) is cylindrical, and the cavity (6) can completely surround the side wall of the resonator (5) when the lug (9) is positioned in the groove (10).

6. Radar sensor according to claim 4, characterized in that the body (21) is integrally connected with an elastic ring (14) around the periphery below the annular block (22), the outer diameter of the elastic ring (14) is smaller than the inner diameter of the base (3), and the diameter of the cavity (6) is smaller than the diameter of the resonator (5);

when the resonator (5) is detachably connected to the inside of the cavity (6), the resonator (5) can push the elastic ring (14) to be attached to the inner wall of the base (3).

7. The radar sensor according to claim 1, characterized in that the bottom of the main body (21) is integrally connected with an annular protrusion (15), and an annular groove (16) matched with the annular protrusion (15) is formed at the bottom of the inner side of the base (3);

when installed, the annular protrusion (15) is positioned inside the annular groove (16) and is used for sealing the base (3) and the main body (21).

8. The radar sensor according to claim 1, characterized in that the outer wall of the cover (4) is provided with a damping mechanism (12) on the side close to the free end of the cover (4).

9. The radar sensor according to claim 1, characterized in that the bottom of the main body (21) is provided with a through hole (13) for placing sound absorbing cotton (11), the through hole (13) is communicated with the cavity (6), the sound absorbing cotton (11) is detachably connected with the resonator (5), and the diameter of the through hole (13) is smaller than the diameter of the cavity (6).

10. The radar sensor according to claim 1, characterized in that a clamping ring is arranged on the periphery of the base (3), and a clamping groove matched with the clamping ring is arranged on the inner side of the cover body (4).