JP6973350B2 - Fixed structure of radio wave radar device - Google Patents

Description

The present invention relates to a fixed structure of a radio wave radar device for fixing a radio wave radar device that transmits radio waves to the outside of a vehicle and receives radio waves reflected by hitting an object outside the vehicle to the vehicle.

In a vehicle in which a radio wave radar device is installed between the vehicle body and the bumper cover, radio waves such as millimeter waves are transmitted from the device to the outside of the vehicle. The radio wave reflected by hitting an object outside the vehicle is received by the radio wave radar device. The transmitted and received radio waves recognize the object, detect the distance between the vehicle and the object, and detect the relative speed between the vehicle and the object.

In the vehicle, a window is opened in front of the radio wave radar device in the radio wave transmission direction in the bumper cover, and a radio wave transmission cover that hides the radio wave radar device and has radio wave transmission is attached to the window. Will be done.

In a vehicle equipped with the radio wave radar device and the radio wave transmission cover, it is important that the distance from the radio wave radar device to the radio wave transmission cover is appropriately adjusted in order to reduce the amount of radio wave attenuation. This is because the radio waves reflected by the radio wave transmission cover and the radio waves sent from the radio wave radar device interfere with each other, and the radio waves are enhanced or attenuated according to the distance from the radio wave radar device to the radio wave transmission cover. This is because the amount of radio wave attenuation by the radio wave transmission cover changes. Therefore, it is required to fix the radio wave radar device to the radio wave transmission cover at a place separated by a specific distance where the amount of radio wave attenuation is small.

From this point of view, it is desirable that the radio wave radar device is fixed to the radio wave transmission cover. However, neither the radio wave transmission cover nor many parts of the bumper cover to which the radio wave transmission cover is fixed have high rigidity capable of supporting a heavy object such as a radio wave radar device. This is because it is necessary to absorb the impact of the collision. When the radio wave radar device is fixed to the radio wave transmission cover, the weight of the radio wave radar device acts on the radio wave transmission cover, and there is a problem that the radio wave transmission cover comes off from the bumper cover. Therefore, it is difficult to directly fix the radio wave radar device to the radio wave transmission cover.

Therefore, conventionally, as described in Patent Document 1, for example, the radio wave radar device is fixed to a highly rigid component such as a lean force or a front frame via a mounting bracket.

Japanese Patent No. 6032167

However, the lean force and the front frame are welded products made of steel, and the dimensions of each part and the position where the mounting bracket is attached vary greatly. Therefore, it is difficult to accurately fix the radio wave radar device to a place separated from the radio wave transmission cover by a specific distance where the amount of radio wave attenuation is small. As a result, there is a problem that the amount of radio wave attenuation varies between vehicles even in the same vehicle type, and the performance of the radio wave radar device is not stable.

The present invention has been made in view of such circumstances, and an object thereof is to fix a radio wave radar device at a place separated from a radio wave transmission cover by a specified distance and to stabilize the performance of the radio wave radar device. The purpose is to provide a fixed structure for a radio wave radar device.

The fixed structure of the radio wave radar device that solves the above problems is arranged between the vehicle body and the bumper cover fixed to the vehicle body at the flange portion provided on the peripheral portion of the vehicle body, and transmits radio waves toward the outside of the vehicle body. It is equipped with a radio wave radar device that receives radio waves reflected by hitting an object outside the vehicle, has radio wave transmission, and is placed in front of the radio wave radar device in the radio wave transmission direction and fixed to the bumper cover. A radio wave radar frame that is applied to a vehicle provided with a radio wave transmission cover and has a fixed structure for fixing the radio wave radar device to the vehicle, and is fixed to the vehicle body or the flange portion and has a receiving surface. A radar bracket fixed to the radio wave radar device and having a receiving surface is provided, and at least one of the receiving surface and the receiving surface is composed of a surface extending in the transmission / reception direction of the radio wave, and the radar bracket is formed. On the receiving surface, the radar frame is slidably mounted on the receiving surface in the transmission / reception direction, and the radio wave transmission cover is provided with a fastening portion, which is formed on the radar bracket. The fastened portion is fastened to the fastened portion by the fastening force of the fastener toward the front in the transmission direction.

According to the above configuration, the weight of the radio wave radar device and the radar bracket acts on the receiving surface of the radar frame on the receiving surface of the radar bracket. The weight acts on the flange portion of the vehicle body or the bumper cover via the radar frame. These vehicle bodies or flanges have higher rigidity than the parts of the radio wave transmission cover and the bumper cover that absorb the impact at the time of collision. Therefore, the weight of the radio wave radar device and the radar bracket is received by the highly rigid vehicle body or the flange portion via the radar frame.

The radar bracket mounted on the receiving surface on the receiving surface is slidable on the receiving surface in the direction of transmitting and receiving radio waves.
Therefore, when the fastener is operated, the fastened portion formed on the radar bracket is brought closer to the fastened portion by the fastening force of the fastener toward the front in the transmission direction. The radar bracket is slid on the receiving surface toward the side approaching the radio wave transmission cover together with the radio wave radar device. This sliding is performed while the weight of the radio wave radar device and the radar bracket is received by the vehicle body or the flange portion via the radar frame.

The above sliding is performed regardless of the variation in the position of the radar bracket with respect to the radar frame in the radio wave transmission / reception direction.
Therefore, unlike the conventional technology in which the radio wave radar device is fixed to a highly rigid part such as a lean force or a front frame via a mounting bracket, the radio wave radar device is slid from the radio wave transmission cover to a place separated by a specified distance. , It is possible to hold the same radio wave radar device at that position. As a result, it is possible to stabilize the performance of the radio wave radar device between vehicles of the same vehicle type.

In the fixed structure of the radio wave radar device, the radar frame is formed with a position adjusting hole portion penetrating in the transmission / reception direction, the receiving surface is formed by the bottom wall surface of the position adjusting hole portion, and the radar bracket has a position adjusting hole portion. A plate-shaped portion extending rearward in the transmission direction is formed, the receiving surface is formed by the lower surface of the plate-shaped portion, and the plate-shaped portion is inserted into the position adjusting hole portion from the front side in the transmission direction. It is preferable that the position adjusting hole portion is placed on the receiving surface on the receiving surface, and the vertical dimension of the position adjusting hole portion is set to be larger than the vertical thickness of the plate-shaped portion. ..

According to the above configuration, the plate-shaped portion of the radar bracket is inserted through the position adjusting hole portion of the radar frame and placed on the bottom wall surface. The bottom wall surface of the position adjusting hole portion functions as a receiving surface, and the lower surface of the plate-shaped portion functions as a receiving surface. The weight of the radio wave radar device and the radar bracket acts on the radar frame via the receiving surface of the plate-shaped portion and the receiving surface of the position adjusting hole portion. The weight is received by the flange portion of the vehicle body or the bumper cover via the radar frame.

Then, when the fastener is operated, the radar bracket is slid on the receiving surface of the position adjusting hole portion on the receiving surface of the plate-shaped portion toward the side approaching the radio wave transmission cover together with the radio wave radar device.

Here, the position adjusting hole portion whose vertical dimension is set larger than that of the plate-shaped portion absorbs the variation in the vertical position of the plate-shaped portion. Due to the above absorption, the plate-shaped portion is placed on the receiving surface of the position adjusting hole portion.

Therefore, the above sliding is performed regardless of the variation in the vertical position of the radar bracket with respect to the radar frame.
In the fixed structure of the radio wave radar device, the distance between the plate-shaped portion and the upper wall surface of the position adjusting hole portion is 1 mm in a state where the plate-shaped portion is placed on the receiving surface of the position adjusting hole portion. It is preferably set to ~ 5 mm.

According to the above configuration, when the plate-shaped portion is placed on the receiving surface of the position adjusting hole portion, the plate-shaped portion has a gap of the above-mentioned size between the plate-shaped portion and the upper wall surface of the position adjusting hole portion. There will be a gap. This gap absorbs variations in the vertical position of the plate-shaped portion.

In the fixing structure of the radio wave radar device, the fastener is formed of a screw, a screw insertion hole penetrating in the transmission / reception direction is formed in the fastened portion, and the screw insertion hole is an elongated hole extending in the vertical direction. The screw is preferably inserted into the screw insertion hole and screwed into the fastening portion.

According to the above configuration, when the screw inserted into the screw insertion hole of the fastened portion is rotated in the tightening direction, the fastened portion is brought to the fastened portion by the fastening force of the fastener toward the front in the transmission direction. To be concluded. At the time of this fastening, the screw insertion hole extending in the vertical direction absorbs the variation in the vertical position of the fastened portion and thus the radar bracket. Therefore, regardless of the above variation, the receiving surface comes into contact with the receiving surface. The above fastening does not hinder the weight of the radio wave radar device and the radar bracket when being received by the flange portion of the vehicle body or the bumper cover via the radar frame.

In the fixed structure of the radio wave radar device, when the plate-shaped portion is a horizontal plate-shaped portion, the radar bracket is formed with a vertical plate-shaped portion extending upward or downward from the horizontal plate-shaped portion, and the lateral portion is formed. It is preferable that the vertical plate-shaped portion is arranged behind the radar frame in the transmission direction with the plate-shaped portion inserted through the position adjusting hole portion.

According to the above configuration, the horizontal plate-shaped portion inserted through the position adjusting hole portion can slide on the receiving surface of the same position adjusting hole portion in the radio wave transmission / reception direction. The vertical plate-shaped portion extending upward or downward from the horizontal plate-shaped portion is located behind the radar frame in the transmission direction. When the radar bracket slides forward in the transmission direction, the vertical plate-shaped portion hits the portion of the radar frame around the position adjusting hole so that the radar bracket slides further forward. regulate. This regulation prevents the horizontal plate-shaped portion from coming out of the position adjusting hole portion and the radar bracket from falling off from the radar frame.

In the fixed structure of the radio wave radar device, when the radar bracket is in contact with the front surface of the radar frame in the transmission direction and the radar bracket is farthest from the radio wave transmission cover, the vertical plate in the transmission / reception direction. It is preferable that the distance between the shape portion and the radar frame is set to 1 mm to 5 mm.

According to the above configuration, when the radar bracket is brought into contact with the front surface of the radar frame in the transmission direction so that the radar bracket is farthest from the radio wave transmission cover, the radar frame and the vertical plate-shaped portion are formed. Between them, there is a gap having the above-mentioned size interval. This gap absorbs variations in the position of the vertical plate-shaped portion in the transmission / reception direction.

In the fixed structure of the radio wave radar device, the position adjusting hole portion extends in a direction orthogonal to the transmission direction and the vertical direction, and the radar frame is connected to one end of the position adjusting hole portion. In this state, it is preferable that an insertion hole portion is formed that penetrates in the transmission / reception direction and allows the insertion of the horizontal plate-shaped portion and the vertical plate-shaped portion.

According to the above configuration, the horizontal plate-shaped portion and the vertical plate-shaped portion of the radar bracket are inserted into the insertion hole portion from the front side of the radar frame in the transmission direction, so that the vertical plate-shaped portion is positioned in the transmission direction. It is arranged behind the adjustment hole. In this state, the radar bracket is on the position adjusting hole side with respect to the radar frame and is moved in the extending direction of the position adjusting hole portion, so that the horizontal plate-shaped portion is inserted into the position adjusting hole portion. become.

In the fixed structure of the radio wave radar device, the radio wave radar device is a radio wave radar device for front side monitoring which is arranged on the side of the front part of the vehicle in the vehicle width direction and transmits radio waves diagonally to the front side. Is preferable.

The fixed structure of the radio wave radar device is applicable to a vehicle in which the radio wave radar device for front side monitoring is arranged on the side portion in the vehicle width direction of the front portion, as described above. In this case, the radio wave transmission cover is arranged at a position diagonally to the front side of the vehicle with respect to the radio wave radar device and fixed to the bumper cover. Then, while the weights of the radio wave radar device and the radar bracket are received by the flange portion of the vehicle body or the bumper cover via the radar frame, the radio wave radar device is fixed in a state of being positioned at a predetermined distance from the radio wave transmission cover. Will be done.

According to the fixed structure of the radio wave radar device, the radio wave radar device can be fixed at a place separated from the radio wave transmission cover by a predetermined distance, and the performance of the radio wave radar device can be stabilized.

A partial perspective view showing a front side portion of a vehicle to which a radio wave radar device in one embodiment is fixed. It is a figure which shows one Embodiment, and is the partial rear view which looked at the fixed structure of a radio wave radar device from the inside of a bumper cover. An exploded perspective view of a part of a bumper cover, a radio wave transmission cover, and a radar bracket with a radio wave radar device in one embodiment. An exploded perspective view showing a state before assembling a radar bracket with a radio wave radar device to a radar frame in one embodiment. FIG. 2 is a sectional view taken along line 5-5 of FIG. FIG. 2 is a sectional view taken along line 6-6 of FIG. FIG. 2 is a sectional view taken along line 7-7. (A) is a rear view of the radar bracket fixed to the radio wave radar device in one embodiment, and (b) to (d) are partial rear views showing a part of FIG. 8 (a) in an enlarged manner. (A) is a partial rear view of the radar frame in one embodiment, and (b) and (c) are partial rear views showing a part of FIG. 9 (a) in an enlarged manner. (A) is a partial rear view of the radar assembly in one embodiment, and (b) and (c) are partial rear views showing a part of FIG. 10 (a) in an enlarged manner. (A) corresponds to FIG. 10 (b), and (b) is a diagram corresponding to FIG. 10 (c), both of which show a state in which the horizontal plate-shaped portion is placed on the receiving surface of the position adjusting hole portion. Partial rear view shown.

Hereinafter, an embodiment of the fixed structure of the radio wave radar device will be described with reference to the drawings.
The following description will be described with the forward direction of the vehicle as the front and the reverse direction as the rear. Further, the vertical direction means the vertical direction of the vehicle, and the horizontal direction is the vehicle width direction, which coincides with the horizontal direction when the vehicle moves forward.

As shown in FIGS. 1 and 5, a bumper cover 11 made of a resin material such as polypropylene resin (PP) is arranged at the front portion of the vehicle 10. Flange portions 12 that bend or bend toward the vehicle body 19 of the vehicle 10 are formed on the upper and lower portions of the bumper cover 11. The bumper cover 11 is fixed to the vehicle body 19 by a fastener 9 at the flange portion 12. The rigidity of many parts of the bumper cover 11 except the flange portion 12 is lowered in order to absorb the impact when the vehicle 10 collides. However, the rigidity of the flange portion 12 is higher than that of the above portion by being fixed to the vehicle body 19.

Radio radar devices 18 for front-side monitoring are installed on both sides of the bumper cover 11 and the vehicle body 19 in the vehicle width direction. The radio wave radar device for front-side monitoring is used in, for example, a system for reducing a collision of a head-to-head at an intersection approaching diagonally from the front with a good line of sight, a collision with an oncoming vehicle outside the center line, and the like. Detects lateral or diagonally anterior lateral objects.

The radio wave radar device 18 transmits a radio wave 26 such as a millimeter wave toward the diagonally front side of the outside of the vehicle, and receives the radio wave 26 reflected by hitting an object outside the vehicle. The millimeter wave is a radio wave having a wavelength of 1 mm to 10 mm and a frequency of 30 GHz to 300 GHz. The radio wave radar device 18 recognizes the object outside the vehicle from the time difference between the transmitted radio wave 26 and the received radio wave 26, the intensity of the received wave, and the like, and detects the distance and the relative speed between the vehicle 10 and the object. Or something.

As shown in FIGS. 2 and 3, mounting seats 13 having screw insertion holes 14 are formed at a plurality of locations separated from each other in the circumferential direction of the flange portion 12. Further, in the bumper cover 11, a window portion 15 is opened in front of the bumper cover 11 in the transmission direction of the radio wave 26 from the radio wave radar device 18 (see FIGS. 1, 5 and 7). The window portion 15 is located diagonally to the front side of the radio wave radar device 18. The bumper cover 11 is formed with claw portions 16 projecting rearward in the transmission direction from a plurality of locations (two locations) on the upper edge portion of the window portion 15 and a plurality of locations (two locations) on the lower edge portion, respectively.

A radio wave transmission cover 20 is attached to the window portion 15. The radio wave transmission cover 20 is formed of a resin material having the transparency of the radio wave 26, and is located diagonally to the front side of the radio wave radar device 18. The skeleton portion of the radio wave transmission cover 20 is composed of a cover main body portion 21 that closes the window portion 15. Projecting pieces 22 projecting upward or downward are formed at a plurality of locations separated from each other in the circumferential direction of the upper end portion of the cover main body portion 21 and at a plurality of locations separated from each other in the circumferential direction of the lower end portion. The protruding piece 22 at the upper end protrudes upward from the cover main body 21, and the protruding piece 22 at the lower end protrudes downward from the cover main body 21. An elongated hole 23 is penetrated through each projecting piece 22 in the transmission / reception direction of the radio wave 26.

Then, as shown in FIGS. 2, 3 and 6, the corresponding claw portion 16 is inserted into and locked to each elongated hole 23, so that the window portion 15 is closed by the cover main body portion 21. The radio wave transmission cover 20 is fixed to the bumper cover 11.

As shown in FIGS. 3, 5 and 6, a fastening portion 24 extending in the vertical direction is formed at a portion of the upper end portion and the lower end portion of the cover main body portion 21 which are separated from the protruding piece 22 in the circumferential direction. Has been done. In the present embodiment, the fastening portion 24 (see FIG. 5) is formed at one position on the upper end portion of the cover main body portion 21, and the fastening portion 24 (see FIG. 6) is formed at two locations separated from each other in the circumferential direction of the lower end portion. Has been done.

As shown in FIGS. 3 and 4, a radar bracket 30 and a radar frame 40 are arranged between the bumper cover 11 and the vehicle body 19 in order to fix the radio wave radar device 18 to the vehicle 10. Next, each will be described.

<Radar bracket 30>
As shown in FIGS. 4 and 8 (a) to 8 (d), the radar bracket 30 is formed of a metal plate and is arranged behind the radio wave radar device 18 in the transmission direction. The radar bracket 30 may be molded from a resin.

The radar bracket 30 includes a main body plate portion 31 arranged on the rear side of the radio wave transmission cover 20 in the transmission direction, and a pair of mounting plate portions 32 formed on both sides of the main body plate portion 31 in the horizontal direction. .. The main body plate portion 31 is fixed to the rear surface of the radio wave radar device 18 in the transmission direction by means such as welding and screw fastening. A plate-shaped fastened portion 33 extending in the vertical direction is formed at the upper end portion of the main body plate portion 31 and the lower end portion of each mounting plate portion 32, respectively. The fastened portion 33 in the main body plate portion 31 is formed above the upper end portion of the main body plate portion 31, and the fastened portion 33 in each mounting plate portion 32 is below the lower end portion of the mounting plate portion 32. Is formed in.

Each fastened portion 33 is formed with a screw insertion hole 34 penetrating in the transmission / reception direction of the radio wave 26. The screw insertion hole 34 for each of the fastened portions 33 is composed of elongated holes extending in the vertical direction.

At the four corners of the radar bracket 30, horizontal plate-shaped portions 35 extending to the rear side in the transmission direction are formed as plate-shaped portions. The lower surface of each horizontal plate-shaped portion 35 constitutes a receiving surface 36 extending in the transmission / reception direction. Each of the upper horizontal plate-shaped portions 35 for each mounting plate portion 32, and the vertical plate-shaped portion 37 extends upward from the rear end portion in the transmission direction. In each of the lower horizontal plate-shaped portions 35 of each mounting plate portion 32, the vertical plate-shaped portion 37 extends downward from the rear end portion in the transmission direction (see FIG. 7).

<Radar frame 40>
As shown in FIGS. 3, 4 and 9, the radar frame 40 is made of a resin material. The outer shell portion of the radar frame 40 is composed of a frame body 41 forming an annular shape. Screw bosses 42 having screw holes 43 are formed at a plurality of locations in the circumferential direction of the frame body 41, more specifically, at locations corresponding to the mounting seat 13 in the bumper cover 11.

The radar frame 40 is fixed to the flange portion 12 by tightening the screws 17 inserted into the screw insertion holes 14 in the flange portion 12 to the screw boss 42.

As shown in FIGS. 4 and 9 (a) to 9 (c), the radar frame 40 is located at a position sandwiched between a pair of vertical wall portions 44 extending in the vertical direction in parallel with each other and both vertical wall portions 44. It is provided with a formed opening 45. Mounting holes 46 penetrating in the transmission / reception direction are formed at a plurality of locations (two locations) of the vertical wall portions 44 separated from each other in the vertical direction. The mounting hole 46 for each vertical wall portion 44 includes a position adjusting hole portion 47 and an insertion hole portion 51. The upper mounting holes 46 of each vertical wall portion 44 have the same shape as each other, and the lower mounting holes 46 of each vertical wall portion 44 have the same shape as each other.

The position adjusting hole portion 47 for each mounting hole 46 extends in a direction orthogonal to the transmission direction and the vertical direction (horizontal direction in FIGS. 9A to 9C). The bottom wall surface of each position adjusting hole portion 47 constitutes a receiving surface 48.

As shown in FIGS. 4 and 10 (a) to 10 (c), each of the horizontal plate-shaped portions 35 of the radar bracket 30 is inserted into the corresponding position adjusting hole portion 47. Each horizontal plate-shaped portion 35 is placed on the receiving surface 48 on its own receiving surface 36, and is slidable in the transmission / reception direction.

The vertical dimension of each position adjusting hole portion 47 is set to be larger than the vertical thickness of the horizontal plate-shaped portion 35. Then, in a state where each horizontal plate-shaped portion 35 is placed on the receiving surface 48, a distance D1 of 1 mm to 5 mm is provided between the horizontal plate-shaped portion 35 and the upper wall surface 49 of each position adjusting hole portion 47. It is set so as to generate a gap having a (see FIG. 7).

Further, in a state where each horizontal plate-shaped portion 35 is arranged in the position adjusting hole portion 47, each vertical plate-shaped portion 37 is arranged on the rear side in the transmission direction with respect to the vertical wall portion 44.
Then, as shown in FIG. 7, when the mounting plate portion 32 is in contact with the front surface of the vertical wall portion 44 in the transmission direction and the radar bracket 30 is farthest from the radio wave transmission cover 20, each in the transmission / reception direction. A gap having a gap D2 of 1 mm to 5 mm is set between the vertical plate-shaped portion 37 and the vertical wall portion 44.

As shown in FIGS. 9 (a) to 9 (c), the insertion hole 51 for each mounting hole 46 on the upper side is one of the position adjusting hole 47 at the lower end thereof (FIGS. 9 (b) and 9 (c)). It is connected to the end of each left). The insertion hole 51 for each mounting hole 46 on the lower side is connected to the end of one of the position adjusting hole 47 (on the left side of each of FIGS. 9B and 9C) at the upper end thereof. Each insertion hole 51 penetrates the vertical wall 44 in the transmission / reception direction. Each insertion hole 51 is formed to have a size that allows the horizontal plate-shaped portion 35 and the vertical plate-shaped portion 37 to be inserted in the transmission / reception direction (see FIGS. 11A and 11B).

Then, as shown in FIGS. 5, 6 and 10 (a) to 10 (c), the radar bracket 30 is fastened to the radio wave transmission cover 20 by a screw 25 as a fastener. More specifically, each screw 25 is inserted into each screw insertion hole 34 of the corresponding fastened portion 33 and screwed into the corresponding fastening portion 24. Each fastened portion 33 is fastened to the fastening portion 24 from the rear side in the transmission direction by the fastening force of the screw 25 toward the front side in the transmission direction.

Next, the operation and effect of the present embodiment configured as described above will be described together with the procedure for assembling the constituent members of the fixed structure of the radio wave radar device.
(I) Fixing the radio wave transmission cover 20 to the bumper cover 11 As shown in FIGS. 3 and 6, the radio wave transmission cover 20 is brought closer to the window portion 15 of the bumper cover 11 from the rear side in the transmission direction. The corresponding claw portion 16 is inserted into and locked to the elongated hole 23 of each protruding piece 22. By these locking, the radio wave transmission cover 20 is fixed to the bumper cover 11 in a state where the window portion 15 is closed by the cover main body portion 21.

(Ii) Formation of Radar Assembly 55 As shown in FIG. 4, the radar bracket 30 with the radio wave radar device 18 is brought closer to the radar frame 40 from the front side in the transmission direction.

As shown by the alternate long and short dash line in FIGS. 11A and 11B, the horizontal plate-shaped portion 35 and the vertical plate-shaped portion 37 for each mounting plate portion 32 are the insertion holes of the mounting holes 46 corresponding to the radar frame 40. It is inserted through 51. These insertions are performed until the vertical plate-shaped portion 37 for each mounting plate portion 32 is located behind the vertical wall portion 44 in the transmission direction (see FIG. 7).

The radar bracket 30 is on the side of the position adjusting hole portion 47 (on the right side of FIGS. 11A and 11B) with respect to the radar frame 40, and is moved in the extending direction of the position adjusting hole portion 47. As shown in the cross section in FIGS. 11A and 11B, when the movement is performed until the entire horizontal plate-shaped portion 35 for each mounting plate portion 32 is located in the position adjusting hole portion 47, each lateral portion is performed. The plate-shaped portion 35 is inserted into the corresponding position adjusting hole portion 47. The vertical plate-shaped portion 37 extending upward or downward from each horizontal plate-shaped portion 35 is located behind the vertical wall portion 44 in the transmission direction.

In this way, the radar assembly 55 is formed by assembling the radar bracket 30 with the radio wave radar device 18 to the radar frame 40. In the radar assembly 55, the horizontal plate-shaped portion 35 can move with respect to the position adjusting hole portion 47 in any of the extending direction of the position adjusting hole portion 47, the transmission / reception direction, and the vertical direction.

When the radar bracket 30 moves forward in the transmission direction, each vertical plate-shaped portion 37 is restricted from moving further forward by hitting the rear surface of the radar frame 40 (vertical wall portion 44) in the same transmission direction. do. This regulation prevents each horizontal plate-shaped portion 35 from coming out of the position adjusting hole portion 47 and the radar bracket 30 from falling off from the radar frame 40.

(Iii) Fixing the radar frame 40 to the bumper cover 11 The radar assembly 55 is brought closer to the window portion 15 and the radio wave transmission cover 20 from the rear side of the bumper cover 11 in the transmission direction. As shown in FIGS. 3 and 4, the screw 17 is inserted into the screw insertion hole 14 for each mounting seat 13 in the flange portion 12, and is fastened to the corresponding screw boss 42 of the radar frame 40. By these tightening, the radar frame 40 of the radar assembly 55 is fixed to the flange portion 12.

In this state, as shown in FIGS. 7 and 11 (a) and 11 (b), each horizontal plate-shaped portion 35 has the bottom of the corresponding position adjusting hole portion 47 due to the weight of the radio wave radar device 18 and the radar bracket 30. It is placed on the wall.

The bottom wall surface of each position adjusting hole portion 47 functions as a receiving surface 48, and the lower surface of each horizontal plate-shaped portion 35 functions as a receiving surface 36. The weight of the radio wave radar device 18 and the radar bracket 30 acts on the radar frame 40 via the receiving surface 36 for each horizontal plate-shaped portion 35 and the receiving surface 48 for each position adjusting hole portion 47.

At this stage, each horizontal plate-shaped portion 35 inserted through each position adjusting hole portion 47 is slidable on each receiving surface 48 in the transmission / reception direction.
Here, in many parts of the bumper cover 11 except the flange portion 12, the rigidity is set low in order to absorb the impact of the vehicle 10 at the time of collision. However, the rigidity of the flange portion 12 fixed to the vehicle body 19 is higher than the rigidity of the above-mentioned portions of the radio wave transmission cover 20 and the bumper cover 11. The radar frame 40 is fixed to the flange portion 12 having high rigidity as described above. Therefore, the weights of the radio wave radar device 18 and the radar bracket 30 are received by the flange portion 12 via the radar frame 40.

(Iv) Fixing the radar bracket 30 with the radio wave radar device 18 to the radio wave transmission cover 20 As shown in FIGS. 5, 6 and 10 (a) to 10 (c), screws for each fastened portion 33 of the radar bracket 30. A screw 25 is inserted through the insertion hole 34 from the rear side in the transmission direction, and the screw 25 is rotated in the tightening direction. Then, the radar bracket 30 is slid forward on the receiving surface 48 of each position adjusting hole 47 together with the radio wave radar device 18 by the fastening force of the screw 25 toward the front side in the transmission direction. .. This sliding is performed while the weights of the radio wave radar device 18 and the radar bracket 30 are received by the flange portion 12 via the radar frame 40.

Here, the gap having a distance D1 of 1 mm to 5 mm set between the horizontal plate-shaped portion 35 and the upper wall surface 49 of the position adjusting hole portion 47 absorbs the variation in the vertical position of the horizontal plate-shaped portion 35. .. Therefore, regardless of the above variation, each horizontal plate-shaped portion 35 can be placed on the receiving surface 48 of each position adjusting hole portion 47.

The screw insertion holes 34, each of which is composed of elongated holes extending in the vertical direction, absorb variations in the vertical position of the fastened portion 33 and thus the radar bracket 30. Therefore, regardless of the variation in the vertical position, the receiving surface 36 can be brought into contact with the receiving surface 48. The above fastening does not hinder the weight of the radio wave radar device 18 and the radar bracket 30 when they are received by the flange portion 12 of the bumper cover 11 via the radar frame 40.

Further, the gap having a gap D2 having a size of 1 mm to 5 mm, which is set between each vertical wall portion 44 of the radar frame 40 and each vertical plate-shaped portion 37, is formed in each vertical plate-shaped portion 37 in the transmission / reception direction. Absorbs variations in the position of. As a result, the radar bracket 30 can slide forward on the receiving surface 48 of each position adjusting hole 47 in the transmission direction regardless of the variation in the position.

When the fastening of the fastened portion 33 to the fastening portion 24 by each screw 25 is completed, the radio wave radar device is fixed to a highly rigid component such as a lean force or a front frame via a mounting bracket, unlike the conventional technique. The radio wave radar device 18 is located at a position separated from the radio wave transmission cover 20 by a predetermined distance, and is held at that position. Therefore, the performance of the radio wave radar device 18 can be stabilized among the vehicles 10 of the same vehicle type.

According to this embodiment, the following effects can be obtained in addition to the above.
Each horizontal plate-shaped portion 35 is inserted through the corresponding position adjusting hole portion 47 and placed on the receiving surface 48. The vertical dimension of the position adjusting hole portion 47 is set to be larger than the vertical thickness of the horizontal plate-shaped portion 35. Further, an insertion hole 51 is connected to each position adjusting hole 47.

Therefore, when an impact is applied to the radio wave transmitting cover 20 or the peripheral portion of the bumper cover 11 of the radio wave transmitting cover 20 due to a collision or the like, the horizontal plate-shaped portion 35 moves in the transmission / reception direction with respect to the position adjusting hole portion 47. Or, it moves upward in the position adjusting hole portion 47, or moves in the extending direction of the position adjusting hole portion 47. This movement can alleviate the impact applied to the radio wave radar device 18.

It should be noted that the above embodiment can also be implemented as a modified example in which this is modified as follows.
The radar frame 40 may be fixed directly to the vehicle body 19 or indirectly via a highly rigid member such as a bracket instead of the flange portion 12 of the bumper cover 11.

-A fastener different from the screw 25 may be used provided that each fastened portion 33 of the radar bracket 30 can be fastened to the corresponding fastening portion 24 of the radio wave transmission cover 20.

The target composed of the receiving surface 48 and the receiving surface 36 extending in the transmission / reception direction of the radio wave 26 may be changed from the receiving surface 36 in the above embodiment to the receiving surface 48. It may be changed to both 48 and the receiving surface 36. If at least one of the receiving surface 48 and the receiving surface 36 is composed of a surface extending in the transmission / reception direction, the radar bracket 30 can be slid forward on the receiving surface 48 in the transmission direction of the radio wave 26.

-The fixed structure of the radio wave radar device can also be applied to a vehicle in which a radio wave radar device that transmits radio waves in a direction different from the diagonally front side is arranged as a radio wave radar device. The corresponding radio wave radar device is, for example, a radio wave radar device for front monitoring, rear monitoring, and rear side monitoring.

The radio wave radar device for forward monitoring is the central portion of the front part of the vehicle in the vehicle width direction, and is arranged behind the bumper cover in the front bumper. Has a role to play.

The radio wave radar device for rearward monitoring is a central portion of the rear part of the vehicle in the vehicle width direction, and is arranged in front of the bumper cover in the rear bumper. It plays a role in detecting.

Radio radar devices for rear side monitoring are arranged on both sides of the bumper cover in the rear bumper mounted on the rear of the vehicle in the vehicle width direction, and transmit radio waves diagonally to the rear side, for example, for the driver. It plays a role in detecting vehicles on the diagonally rear side, which tend to be blind spots, and vehicles approaching from the diagonally rear side when reversing.

In a vehicle to which any of the above types of radio wave radar devices is fixed, the radio wave transmission cover is arranged in front of the vehicle in the radio wave transmission direction.
-The radio wave radar devices for front side monitoring and rear side monitoring may be fixed to both sides in the vehicle width direction of the vehicle, or may be fixed to only one side.

-The fixed structure of the radio wave radar device can also be applied to a case where a radio wave radar device that transmits radio waves in a band different from the millimeter wave band and receives radio waves reflected by hitting an object is fixed to a vehicle.

10 ... Vehicle, 11 ... Bumper cover, 12 ... Flange part, 18 ... Radio wave radar device, 19 ... Body, 20 ... Radio wave transmission cover, 24 ... Fastening part, 25 ... Screw (fastener), 26 ... Radio wave, 30 ... Radar Bracket, 33 ... Fastened part, 34 ... Screw insertion hole, 35 ... Horizontal plate-shaped part (plate-shaped part), 36 ... Received surface, 37 ... Vertical plate-shaped part, 40 ... Radar frame, 47 ... Position adjustment hole part , 48 ... receiving surface, 49 ... upper wall surface, 51 ... insertion hole, D1, D2 ... spacing.

Claims (8)

It is arranged between the vehicle body and the bumper cover fixed to the vehicle body at the flange portion provided on the peripheral portion of the vehicle body, transmits radio waves toward the outside of the vehicle, and receives radio waves reflected by hitting an object outside the vehicle body. It is applied to a vehicle having a radio wave radar device, having radio wave transmission, and having a radio wave transmission cover arranged in front of the radio wave radar device in the radio wave transmission direction and fixed to the bumper cover. It is a fixed structure of the radio wave radar device that fixes the radio wave radar device to the vehicle.
A radar frame fixed to the vehicle body or the flange portion and having a receiving surface,
A radar bracket fixed to the radio wave radar device and having a receiving surface is provided, and at least one of the receiving surface and the receiving surface is composed of a surface extending in a transmission / reception direction of the radio wave, and the radar bracket is formed. On the receiving surface, the radar frame is slidably mounted on the receiving surface in the transmission / reception direction.
Further, the radio wave transmission cover is provided with a fastening portion, and the fastened portion formed on the radar bracket is fastened to the fastening portion by the fastening force of the fastener toward the front in the transmission direction. Fixed structure of radar device. The radar frame is formed with a position adjusting hole portion penetrating in the transmission / reception direction, and the receiving surface is formed by the bottom wall surface of the position adjusting hole portion.
The radar bracket is formed with a plate-shaped portion extending rearward in the transmission direction, and the receiving surface is formed by the lower surface of the plate-shaped portion.
The plate-shaped portion is inserted through the position adjusting hole portion from the front side in the transmission direction, and is placed on the receiving surface on the receiving surface.
The fixed structure of the radio wave radar device according to claim 1, wherein the vertical dimension of the position adjusting hole portion is set to be larger than the vertical thickness of the plate-shaped portion. A claim that the distance between the plate-shaped portion and the upper wall surface of the position adjusting hole portion is set to 1 mm to 5 mm in a state where the plate-shaped portion is placed on the receiving surface of the position adjusting hole portion. The fixed structure of the radio wave radar device according to 2. The fastener is composed of screws and is composed of screws.
A screw insertion hole penetrating in the transmission / reception direction is formed in the fastened portion.
The screw insertion hole is composed of an elongated hole extending in the vertical direction.
The fixing structure of the radio wave radar device according to claim 2 or 3, wherein the screw is inserted into the screw insertion hole and screwed into the fastening portion. When the plate-shaped portion is a horizontal plate-shaped portion, the radar bracket is formed with a vertical plate-shaped portion extending upward or downward from the horizontal plate-shaped portion.
Any one of claims 2 to 4 in which the horizontal plate-shaped portion is inserted into the position adjusting hole portion and the vertical plate-shaped portion is arranged behind the radar frame in the transmission direction. Fixed structure of the radio wave radar device described in the section. When the radar bracket is in contact with the front surface of the radar frame in the transmission direction and the radar bracket is farthest from the radio wave transmission cover, the distance between the vertical plate-shaped portion and the radar frame in the transmission / reception direction. The fixed structure of the radio wave radar device according to claim 5, wherein is set to 1 mm to 5 mm. The position adjusting hole portion extends in a direction orthogonal to the transmission direction and the vertical direction.
The radar frame has an insertion hole portion that penetrates in the transmission / reception direction while being connected to one end of the position adjustment hole portion and allows insertion of the horizontal plate-shaped portion and the vertical plate-shaped portion. The fixed structure of the radio wave radar device according to claim 5 or 6, which is formed. 3. Fixed structure of the radio wave radar device described in.

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