JP5144702B2 - Mounting structure for vehicle collision detection sensor - Google Patents

Description

  The present invention relates to a mounting structure of a vehicle collision detection sensor, and more particularly to a mounting structure of a collision detection sensor for an air bag device with respect to a vehicle body.

  A vehicle such as an automobile equipped with an airbag device is provided with a collision detection sensor called a satellite sensor that detects a frontal collision and outputs a signal for controlling the operation of the airbag device at the front of the vehicle body.

  The airbag apparatus receives a signal related to collision acceleration from the collision detection sensor, and operates to inflate the airbag when the collision acceleration detected by the collision detection sensor exceeds a preset threshold value.

  As the mounting structure of the collision detection sensor, from the front end of the left and right front side frames that extend in the vehicle longitudinal direction on both sides in the vehicle width direction of the front part of the vehicle body, and from the left and right front pillars on the outside of the front side frame in the vehicle width direction There is one in which a collision detection sensor is fixedly mounted on a connecting frame that connects the front end portions of the left and right upper members that extend forward in the forward direction in the vehicle width direction (for example, Patent Document 1).

Japanese Patent No. 3930004

  The collision detection sensor does not inflate the airbag in a light collision, and in the case of a high-speed collision, the collision detection sensor is applied to the vehicle body so that the collision acceleration exceeding the airbag operation threshold is quickly applied. Must be installed. In order to satisfy this, a bumper beam or a bumper beam extension member, which is a crush member that connects the bumper beam to the front end portion of the front side frame, collides with a vehicle body front member that is disposed in front of the vehicle body from the position where the collision detection sensor is disposed. The distance in the longitudinal direction of the vehicle body from the detection sensor needs to be set to an appropriate value.

  On the other hand, when the collision detection sensor is directly attached to the skeleton member of the vehicle body such as the connection frame as in the conventional structure for mounting the collision detection sensor, the degree of freedom in selecting the position of the collision detection sensor is increased. Therefore, if the separation distance is set to an appropriate value, the arrangement of the front members of the vehicle body such as the bumper beam and the bumper beam extension member, the degree of freedom in designing the structure, and the degree of freedom in designing the front portion of the vehicle body are reduced.

  Further, it is necessary to determine the arrangement and configuration of the vehicle body front member that is most suitable for the collision detection sensor for each vehicle body having a different configuration and size of the vehicle body front portion, and the versatility of the vehicle body front member arrangement and configuration design is low. There are also challenges.

  The problem to be solved by the present invention is that the distance in the longitudinal direction of the vehicle body between the vehicle body front member such as the bumper beam and the bumper beam extension member and the collision detection sensor is set to an appropriate value, and a collision that causes the airbag to inflate has occurred. In this case, the collision acceleration exceeding the threshold value of the airbag operation to the collision detection sensor is ensured to obtain a state in which the collision acceleration sensor can be quickly and quickly applied, and is disposed in front of the vehicle body from the position where the collision detection sensor is disposed. This is to improve the degree of freedom in designing the arrangement and configuration of the vehicle body front member.

  The vehicle collision detection sensor mounting structure according to the present invention includes left and right side frames (10) extending in the vehicle longitudinal direction on both sides in the vehicle width direction of the front portion of the vehicle body,

  Left and right bumper beam extension members (20) fixedly connected to the front ends of the left and right side frames (10) and extending forward, and extending in the vehicle width direction, the left and right bumper beam extension members (20 And a bumper beam (22) fixedly connected to the front end of the side frame (10), and a mounting structure for attaching a collision detection sensor (30) to the side of the side frame (10). A bracket (34) extending to the vehicle body is provided, and the collision detection sensor (30) is attached to a front body extending portion of the bracket (34).

  According to the mounting structure of the collision detection sensor, the bumper beam (22) and the bumper beam extension member (by adjusting the mounting position of the collision detection sensor (30) relative to the vehicle body front extension dimension of the bracket (34) and the vehicle body front extension portion ( The separation distance in the longitudinal direction of the vehicle body between the vehicle body front member such as 20) and the collision detection sensor (30) can be set to an appropriate value.

  The vehicle collision detection sensor mounting structure according to the present invention is, as a preferred embodiment, the collision detection sensor (30), as viewed in the longitudinal direction of the vehicle body, of the bumper beam (22) and the bumper beam extension member (20). The upper member (14) is disposed at a position corresponding to the outer side in the vehicle width direction of the upper member (14) when viewed in the longitudinal direction of the vehicle body, which is disposed at a position corresponding to the outer side in the vehicle width direction.

  According to the mounting structure of the collision detection sensor, the bumper face member (24) attached to the front bumper beam (22) can easily hit the collision detection sensor (30) even in an oblique collision, and the oblique collision can be accurately detected.

  According to another preferred embodiment of the vehicle collision detection sensor mounting structure according to the present invention, the bracket (34) includes a first piece (38) extending forward of the vehicle body and the first piece. And a second piece (40) extending in the vehicle width direction from the tip of (38) to form an L-shaped cross section, and the surface of the second piece (40) on the vehicle rear side Further, the collision detection sensor (30) is attached.

  According to the mounting structure of the collision detection sensor, interference of other members with the collision detection sensor (30) during assembly is reduced, and protection of the collision detection sensor (30) during assembly is achieved.

  The vehicle collision detection sensor mounting structure according to the present invention is, as another preferred embodiment, a corner portion formed by a connection portion between the first piece portion (38) and the second piece portion (40). 39) and a bead (44) extending continuously from the first piece (38) to the second piece (40).

  According to the mounting structure of the collision detection sensor, the rigidity of the bracket (34) can be adjusted by the bead (44), and erroneous detection due to vibration of the bracket (34) due to running vibration can be prevented.

  As another preferred embodiment of the vehicle collision detection sensor mounting structure according to the present invention, the second piece (40) is an electrical connector for harness connection provided in the collision detection sensor (30). (30A) The connector protection piece part (42) located in the vehicle body front is included.

  According to the mounting structure of the collision detection sensor, the electrical connector (30A) can be protected during assembly.

  According to the mounting structure of the vehicle collision detection sensor according to the present invention, the collision detection sensor is attached to the vehicle body front extension portion of the bracket extending from the upper member to the vehicle body front. By adjusting the mounting position of the collision detection sensor with respect to the forward extension portion, the distance in the longitudinal direction of the vehicle body between the vehicle body front member such as the bumper beam and the bumper beam extension member and the collision detection sensor can be set to an appropriate value.

  As a result, if the bumper beam or the bumper beam extension member is completely crushed and deformed due to high-speed collision, the collision detection sensor will receive a collision acceleration exceeding the threshold value of the airbag operation, and the bracket design will be applied quickly. Just get it.

The perspective view which shows one Example of the vehicle body front part structure of the vehicle to which the attachment structure of the collision detection sensor by this invention was applied. The perspective view which shows one Example of the attachment structure of the collision detection sensor by this invention. The top view which shows the attachment structure of the collision detection sensor by a present Example. The perspective view which looked at the principal part of the attachment structure of the collision detection sensor by a present Example from the vehicle body front. The perspective view which looked at the principal part of the attachment structure of the collision detection sensor by a present Example from the vehicle body back.

  Below, the Example of the attachment structure of the collision detection sensor by this invention is described with reference to FIGS.

  As shown in FIG. 1, the vehicle body front portion of the automobile includes, as a skeleton member, left and right front side frames 10 extending in the vehicle front-rear direction on both sides in the vehicle width direction of the vehicle body front portion, and the front side frame 10. Left and right upper members (wheel house upper members) 14 that extend outward from the left and right front pillars 12 in the vehicle width direction outside.

  The front end portions of the left and right front side frames 10 and the front end portions of the left and right upper members 14 are respectively connected to each other by a connecting member 16 (see FIGS. 2 and 3) disposed therebetween. Further, a connecting plate 18 provided so as to bridge between the front end surfaces of the left and right front side frames 10 and the front end surfaces of the left and right upper members 14 is fixed by welding or the like.

  Left and right bumper beam extension members 20 are fixedly connected to front ends of the left and right front side frames 10 with a connecting plate 18 interposed therebetween. The bumper beam extension member 20 is a cylindrical crush member, has a lower withstand pressure load in the longitudinal direction of the vehicle body than the front side frame 10 and the upper member 14, and extends forward from the front end portion of the front side frame 10 to the vehicle body.

  Near the left and right end portions of the bumper beam 22 extending in the vehicle width direction are connected to the front end portions of the left and right bumper beam extension members 20 by welding or the like. A front bumper face member 24 (see FIG. 3) made of an elastomer material or the like is attached to the front portion of the bumper beam 22.

  Next, details of the mounting structure of the collision detection sensor 30 will be described with reference to FIGS. The connecting plate 18 has a flange portion 18A that protrudes outward in the vehicle width direction from the outer edge portion of the upper member 14 in the vehicle width direction. An attachment piece 36 of the bracket 34 is fixedly attached to the front surface of the flange portion 18A by a bolt 50 and a nut 52 that pass through the attachment piece 36 and the flange portion 18A.

  The bracket 34 is a press-molded product, and is bent 90 degrees from the mounting piece 36 and extends forward from the connecting plate 18 to the vehicle body, and 90 degrees from the tip of the first piece 38. The second piece 40 is bent and extends outward in the vehicle width direction, and the first piece 38 and the second piece 40 have an L-shaped cross-sectional shape. The second piece 40 is integrally provided with a tongue-like connector protection piece 42 extending downward.

  The bracket 34 includes a corner 39 that is a connection portion between the first piece 38 and the second piece 40, and extends continuously to the first piece 38 and the second piece 40. The existing protruding bead 44 is press-molded. The bead 44 adjusts the rigidity of the bracket 34 and avoids the bracket 34 swinging due to running vibration.

  The collision detection sensor 30 is attached to the surface of the second piece 40 on the rear side of the vehicle body with screws 54 and nuts 56. The collision detection sensor 30 is also called a satellite sensor, and includes an acceleration sensor that detects a collision acceleration in order to control the operation of the airbag apparatus. Thereby, the collision detection sensor 30 is arranged at a position corresponding to the outside in the vehicle width direction of the bumper beam extension member 20 and the bumper beam 22 in the vehicle width direction when viewed in the longitudinal direction of the vehicle body.

  An electrical connector portion 30A for power supply / signal output is provided at the bottom of the collision detection sensor 30. An electrical connector 60 to which a wire harness 58 for power and signal lines is connected is detachably engaged with the electrical connector portion 30A. A connector protection piece 42 is provided in front of the connection portion between the electrical connector portion 30A and the electrical connector 60, and the front side of the connection portion in the vehicle body is hidden by the connector protection piece portion 42.

  As described above, the collision detection sensor 30 is attached to the vehicle body front extension portion of the bracket 34 that extends forward of the vehicle body from the connecting plate 18 positioned at the front end portion of the front side frame 10. The vehicle body front extension dimension of one piece 38 allows the separation distance between the bump detection beam 30 and the collision detection sensor 30 in the longitudinal direction of the vehicle body to be freely changed without changing the arrangement of the front body members such as the bumper beam 22 and the bumper beam extension member 20. Can be set.

  Thus, when the bumper beam 22 and the bumper beam extension member 20 are completely crushed and deformed due to high-speed collision, the front bumper face member 24 hits the collision detection sensor 30 and the collision load is directly transmitted to the collision detection sensor 30. Can be set to an appropriate value.

  As a result, with the design of the bracket 34 alone, the airbag does not inflate in a light collision, and in the case of a high-speed collision, the collision detection sensor 30 is given a collision acceleration that exceeds the threshold value of the airbag operation quickly and quickly. State is obtained. Thereby, in order to optimize the separation distance, it is avoided that the arrangement of the front members of the vehicle body such as the bumper beam 22 and the bumper beam extension member 20, the degree of freedom in designing the structure, and the degree of freedom in designing the front part of the vehicle body are impaired. Is done.

  Further, it is not necessary to determine the optimal arrangement and configuration of the vehicle body front member for the collision detection sensor 30 for each vehicle body having a different configuration and size of the front portion of the vehicle body only by the design of the bracket 34. The versatility of the design is improved.

  Further, when the bumper beam 22 and the bumper beam extension member 20 are completely crushed and deformed, the front bumper face member 24 hits the collision detection sensor 30 and the collision load is directly transmitted to the collision detection sensor 30 to reliably detect the collision. can do.

  In the present embodiment, the collision detection sensor 30 is disposed at a position corresponding to the outside in the vehicle width direction of the bumper beam extension member 20 and the bumper beam 22 when viewed in the longitudinal direction of the vehicle body. The front bumper face member 24 to be hit easily hits the collision detection sensor 30, and an oblique collision can also be detected.

  In addition, since the collision detection sensor 30 is attached to the surface of the second piece 40 on the rear side of the vehicle body, it is possible to reduce interference of the other members with the collision detection sensor 30 at the time of assembly. The collision detection sensor is protected.

  Further, the second piece 40 includes a connector protection piece 42 located in front of the vehicle body of the electrical connector 30A for harness connection provided in the collision detection sensor 30, so that the electrical connector at the time of assembly is provided. The part 30A is protected.

  In the above-described embodiment, the connecting plate 18 is attached to the front end surfaces of the front side frame 10 and the upper member 14, and the bracket 34 is attached to the front surface of the connecting plate 18, but the connecting plate 18 is omitted. The bracket 34 may be attached to the front end surface of the front side frame 10 or the upper member 14.

  Note that the collision detection sensor 30 and the bracket 34 are symmetrically arranged on the left and right connecting plates 18, and can also detect a streak collision and an oblique collision on the left and right sides.

DESCRIPTION OF SYMBOLS 10 Front side frame 12 Front pillar 14 Upper member 16 Connecting member 18 Connecting plate 20 Bumper beam extension member 22 Bumper beam 24 Front bumper face member 30 Collision detection sensor 34 Bracket 38 First piece 40 Second piece 42 Connector protection piece 44 bead 60 electrical connector

Claims (6)

Left and right side frames extending in the vehicle longitudinal direction on both sides in the vehicle width direction of the front of the vehicle body;
Left and right bumper beam extension members fixedly connected to the front ends of the left and right side frames and extending forward;
A bumper beam extending in the vehicle width direction and fixedly connected to the front ends of the left and right bumper beam extension members;
A mounting structure for attaching a collision detection sensor to the side of the side frame,
Left and right upper members extending outside in the vehicle longitudinal direction of the left and right side frames in the vehicle width direction ; and
A flange portion at the front end of the upper member and protruding outward in the vehicle width direction from the outer edge portion of the upper member in the vehicle width direction;
A bracket is fixedly attached to the flange portion,
The bracket has a portion extending forward of the vehicle body and extending outward in the vehicle width direction, and the collision detection sensor is attached to the portion, and the collision detection sensor is forward of the vehicle body from the front end of the upper member and the vehicle body. A vehicle collision detection sensor mounting structure disposed at a position corresponding to an outer side of an outer edge portion of the upper member in the vehicle width direction when viewed in the front-rear direction . The bumper beam extension member is fixedly connected to the front end of the side frame with the connecting plate interposed between the front end surface of the side frame and the front end surface of the upper member. The attachment structure for a collision detection sensor for a vehicle according to claim 1, wherein the connecting plate integrally has the flange portion. The collision detection sensor, viewed in the longitudinal direction of the vehicle body, the mounting structure of the collision detection sensor for a vehicle according to claim 1 or 2 is disposed at a position corresponding to the outside in the vehicle width direction of the bumper beam. The bracket includes a first piece part and, said first L-shaped cross section and a second piece portion extending in the vehicle width direction outer side from the tip portion of the support sections extending in front of the vehicle body ,
The structure for mounting a collision detection sensor for a vehicle according to any one of claims 1 to 3 , wherein the collision detection sensor is mounted on a surface of the second piece on the rear side of the vehicle body. A bead that continuously extends to the first piece and the second piece is formed including a corner portion that is a connection portion between the first piece and the second piece. The vehicle collision detection sensor mounting structure according to claim 4 . The attachment of the collision detection sensor according to claim 4 or 5 , wherein the second piece includes a connector protection piece located in front of a vehicle body of an electrical connector for harness connection provided in the collision detection sensor. Construction.

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