JP2013237412A - Vehicle-body front structure of automobile - Google Patents

Abstract

An object of the present invention is to reduce unpleasant noise generated in a vehicle interior due to vibration transmitted from a front suspension to a vehicle body side through a front subframe.
In a front structure of a vehicle body in which a suspension arm is supported via a front subframe 5 on left and right front side frames 4 extending forward from the dashboard panel from a dashboard panel, the front subframe includes left and right The vertical member 21 and the front and rear horizontal members 22 and 23 are formed in a substantially rectangular shape in plan view, and the left and right vertical members have arm support portions 46 for supporting the suspension arms, and connecting portions 55 and 55 for the front side frame. 56 and 57, the rear end side connecting part 57 of the left and right vertical members extends rearward from the rear side member, and the left and right rear end side connecting parts are connected to each other in the left and right direction. A brace 65 extending in the direction is provided.
[Selection] Figure 5

Description

  The present invention relates to a vehicle body front structure in which a suspension arm is supported via front subframes on left and right front side frames extending forward from a dashboard panel.

  As a vehicle front structure of an automobile, there is a structure in which a front subframe is attached below the left and right front side frames extending forward from the dashboard panel and a suspension arm is supported on the front subframe. .

  In such a configuration, when the vehicle travels, vibration is input to the arm support portion that supports the suspension arm in the front subframe, and this vibration constitutes the vehicle body skeleton including the front side frame from the front subframe. It is transmitted to the dashboard panel via a member that causes the dashboard panel to vibrate in the front-rear direction, and further, the vibration is transmitted to a surface member such as a floor panel or a window glass, thereby generating noise (road noise) in the vehicle interior. Cause it to occur. Especially when driving on rough roads, low- and medium-frequency (about 100-500 Hz) vibrations are transmitted, and the noise generated in the passenger compartment gives passengers discomfort. However, there is a problem in improving the merchantability.

  In order to reduce the noise in the passenger compartment when the vehicle is traveling, a technique is known in which a bead serving as an elastic bending point is provided at a position near the vehicle body side member in the front cowl. In this technique, the vibration transmitted from the vehicle body side member to the front cowl is blocked by the bead, whereby the vibration transmitted from the vehicle body side member to the dashboard panel via the front cowl can be suppressed.

JP 2010-228718 A

  However, in the conventional technique, the transmission of vibration on a specific vibration transmission path can be blocked by the bead, but the dashboard panel includes a side frame in addition to the upper member arranged on the side of the vehicle body. Vibration is input through the vibration transmission path, and the vibration transmission path that does not pass through the bead cannot be interrupted. In addition, even if a bead is provided, the state where the steel plate member is connected is not changed, and vibration energy is transmitted except for a specific frequency, so that the noise in the passenger compartment is sufficiently reduced. There was a problem that could not.

  The present invention has been devised to solve such problems of the prior art, and its main purpose is to bring the vehicle interior into the vehicle compartment by vibrations transmitted from the front suspension to the vehicle body via the front subframe. An object of the present invention is to provide a front body structure of an automobile configured to reduce unpleasant noise that occurs.

  A first invention made to solve the above problems includes a dashboard lower panel that partitions a vehicle compartment and an engine room, left and right front side frames that extend forward from the dashboard lower panel, and the front side frame. In a vehicle body front structure that includes a front subframe that is supported by a frame and that supports a suspension arm, the front subframe includes left and right vertical members that extend in the longitudinal direction of the vehicle body, and a left and right vertical member that extends in the lateral direction of the vehicle body. The left and right vertical members have arm support portions for supporting the suspension arm, and at least the connecting portion for the front side frame is at the front end side. And the rear end side of the left and right vertical members. Connecting portions, extending rearwardly from the horizontal member of the rear brace extending in the lateral direction of the vehicle body in a manner that connects the connecting portions of the left and right of the rear end side to each other and configured provided.

  According to this, since the left and right connecting portions of the front subframe with respect to the left and right front side frames are connected to each other by the brace, it is possible to increase the rigidity of both the front subframe and the front side frame that supports the front subframe. For this reason, vibration energy input from the suspension arm to the vehicle body side is reduced, and at the same time, vibrations transmitted to the surface members such as the dashboard lower panel, the floor panel and the window glass through the front side frame are suppressed. Since vibration of the surface member can be suppressed, unpleasant noise generated in the passenger compartment can be reduced.

  According to a second aspect of the present invention, the dashboard lower panel has a tunnel front end portion that is substantially U-shaped when viewed from the front with the lower side open at the center in the left-right direction of the vehicle body, and the brace includes the tunnel front end portion. It is set as the structure arrange | positioned more downward.

  According to this, the brace suppresses the tunnel front end from causing expansion deformation due to the vibration transmitted from the suspension arm via the front subframe and the front side frame. For this reason, since the volume change in the passenger compartment due to the deformation of the tunnel portion can be suppressed, the noise in the passenger compartment caused by running vibration can be further reduced.

  According to a third aspect of the present invention, the vertical member has a ridge line portion formed by a side wall portion and a lower wall portion on the inner side in the left-right direction of the vehicle body in the connecting portion on the rear end side. And a lower wall portion, which is formed in a substantially straight rod shape having a substantially L-shaped cross section, and has a ridge line portion formed by the side wall portion and the lower wall portion, and a connecting portion at the left and right ends of the brace The side wall portion on the brace side is bent in a direction along the side wall portion on the vertical member side so that the ridge line portion of the brace is continuous with the ridge line portion of the vertical member. In addition, the side wall portion and the lower wall portion on the brace side are joined to the side wall portion and the lower wall portion on the vertical member side, respectively.

  According to this, the rigidity in the left-right direction of the vehicle body of the connecting portion on the rear end side of the vertical member can be improved. Since the brace has a substantially L-shaped cross section, the rigidity in the vertical direction of the vehicle body and the longitudinal direction of the vehicle body can be increased, thereby suppressing vibrations in the three directions of the vertical direction of the vehicle body, the horizontal direction of the vehicle body, and the longitudinal direction of the vehicle body. can do.

  According to a fourth aspect of the present invention, the left and right vertical members have connecting portions for the front side frame at three locations, a front end side, a rear end side, and an intermediate portion thereof, Arm support portions are provided, and the lateral member on the rear side has widened portions that are widened in the longitudinal direction of the vehicle body on both the left and right sides, and the widened portion is disposed on the rear end side from the intermediate connecting portion in the vertical member. It is set as the structure joined in the area | region which reaches a connection part.

  According to this, the strength of the arm support portion of the vertical member can be increased and the support rigidity can be improved. The widened portion of the horizontal member is formed so that the width gradually increases toward the outer side in the left-right direction of the vehicle body, so that the cross-section becomes small at the tip portion located in the vicinity of the connecting portion on the rear end side. Since the front end portion is reinforced with braces, the rigidity of the entire front sub-frame can be improved, and further, the rigidity of the vehicle body side supporting the front sub-frame can be improved.

  According to a fifth aspect of the present invention, the left and right vertical members have connecting portions for the front side frame at three positions, that is, the front end side, the rear end side, and the middle thereof. Is provided with a bracket projecting upward toward the front side frame, and the front side frame is provided with a bracket projecting downward toward the vertical member. The bracket on the vertical member side and the front The brackets on the side frame side are connected to each other by being fitted to each other.

  According to this, since the bracket on the front subframe side and the bracket on the front side frame side are fitted and connected at the intermediate connecting portion of the vertical member, it is easy to assemble the front subframe on the vehicle body side. At the same time, the rigidity at the connecting portion is improved to reduce the input of vibration energy, and at the same time, vibration transmission from the front subframe to the vehicle body can be suppressed.

  In a sixth aspect of the present invention, the left and right vertical members have a bent portion that is concave in the lateral direction of the vehicle body, and the rear side member is joined to the bent portion.

  According to this, since the arrangement space of another member related to the suspension is defined outside the bent portion of the vertical member, the degree of freedom in designing the suspension can be improved. Further, since the rear side member joined to the bent portion of the vertical member and the brace connected to the rear end portion of the vertical member support the bent portion of the vertical member, the rigidity is reduced by the bent portion. Can be suppressed.

  Further, according to a seventh aspect of the present invention, the brace is formed in a substantially straight rod shape having a substantially L-shaped cross section by a side wall portion and a lower wall portion, and at the edge portions of the side wall portion and the lower wall portion, A bent portion that is bent into a substantially L shape is formed.

  According to this, the rigidity of the brace can be increased.

  As described above, according to the present invention, since the left and right connecting portions of the front sub-frame with respect to the left and right front-side frames are connected to each other by the brace, the rigidity of both the front sub-frame and the front side frame that supports the front sub-frame is increased. be able to. As a result, vibration energy input from the suspension arm to the vehicle body side is reduced, and at the same time, vibrations transmitted to the dashboard lower panel, floor panel, window glass, and other surface members via the front side frame are suppressed. Since vibration of the surface member can be suppressed, unpleasant noise generated in the passenger compartment can be reduced.

It is a perspective view which shows the vehicle body front part structure of the motor vehicle based on this embodiment. It is a bottom view of the vehicle body front part structure shown in FIG. 4 is a bottom view of the front subframe 5 and the front suspension 6. FIG. 2 is a perspective view of a front subframe 5 and a front suspension 6. FIG. 4 is a perspective view showing a connecting portion of the front sub-frame 5 with respect to the front side frame 4. FIG. It is the front view which looked at the dashboard lower panel 3 from the vehicle body front. 4 is a perspective view showing a connecting portion 81 of a brace 65 with respect to a front subframe 5. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing a front body structure of an automobile according to the present embodiment. 2 is a bottom view of the vehicle body front part structure shown in FIG.

  As shown in FIG. 1, this vehicle body front structure includes a dashboard lower panel 3 that partitions the engine room 1 and the vehicle compartment 2, and left and right front side frames 4 that extend from the dashboard lower panel 3 to the front of the vehicle body. A front subframe 5 supported by the front side frame 4 is provided, and a front suspension 6 is supported on the front subframe 5.

  Left and right upper frames 7 extending in the longitudinal direction of the vehicle body are provided outside the front side frame 4 in the vehicle width direction. A damper housing 8 and a wheel house 9 are provided between the front side frame 4 and the upper frame 7. A damper 33 for the front suspension 6 is accommodated in the damper housing 8. An attachment bracket 12 for attaching a bumper beam (not shown) is joined to each front end portion of the front side frame 4 and the upper frame 7. As shown in FIG. 2, a floor frame 15 extending rearward of the vehicle body is provided on the rear side of the front side frame 4.

  FIG. 3 is a bottom view of the front sub-frame 5 and the front suspension 6. FIG. 4 is a perspective view of the front sub-frame 5 and the front suspension 6.

  As shown in FIG. 3, the front sub-frame 5 has a substantially rectangular shape in a plan view by left and right vertical members 21 extending in the vehicle body front-rear direction and front and rear horizontal members 22 and 23 extending in the vehicle body left-right direction. It is configured.

  As shown in FIG. 4, the front suspension 6 is of a so-called strut type, and includes a knuckle 31 that holds wheels (not shown), a suspension arm 32 that rotatably supports the knuckle 31, and a knuckle 31 that is supported. In addition, a damper (strut damper) 33 that generates a required damping force and a spring 34 that biases the damper 33 are provided.

  The knuckle 31 is provided with a damper connecting portion 35 to which a damper 33 is connected, a caliper support portion 36 for supporting a brake caliper (not shown), and a tie rod connecting portion 37 to which a tie rod (not shown) is connected. It has been. The upper end of the damper 33 is supported by the top wall portion of the damper housing 8. The damper 33 is provided with a stabilizer bracket 38, to which an end of the stabilizer 40 is connected via a stabilizer link 39. The stabilizer 40 is supported by the rear side member 23 in the front sub-frame 5 via the bracket 41.

  As shown in FIG. 3, the suspension arm 32 is a so-called A-type arm that is bifurcated from the pivotal support portion 42 of the knuckle 31, and has a front arm portion 43 and a rear arm portion 44. The left and right vertical members 21 in the front subframe 5 have arm support portions 45 and 46 that respectively support the front arm portion 43 and the rear arm portion 44 of the suspension arm 32.

  The front arm support portion 45 is provided at an intermediate position of the joint portion of the vertical member 21 with the front and rear horizontal members 22 and 23. The rear arm support portion 46 is provided at a position where the vertical member 21 is joined to the rear lateral member 23. The front arm part 43 and the rear arm part 44 are connected to arm support parts 45 and 46 via elastic bushes 47 and 48, respectively (see FIG. 4).

  FIG. 5 is a perspective view showing a connecting portion of the front subframe 5 with respect to the front side frame 4. FIG. 5 shows the right side of the vehicle body of the front side frame 4 and the front subframe 5, and the left side of the vehicle body appears substantially symmetrically.

  The front side frame 4 has an inclined portion 52 that extends obliquely upward from the rear end portion 51 on the rear side, and a horizontal portion 53 that extends in a substantially horizontal direction on the front side. A drooping portion 54 extending downward is provided at the front end of the horizontal portion 53.

  The front subframe 5 has connecting portions 55, 56, and 57 for the front side frame at a total of three locations, that is, the front end side and the rear end side of the left and right vertical members 21 and the middle thereof.

  The connecting portion 55 on the front end side is connected to a hanging portion 54 provided at the front end of the front side frame 4. The connecting portion 57 on the rear end side is connected to the rear end portion 51 of the front side frame 4. Each of the connecting portions 55 and 57 has a substantially horizontal mounting surface (see FIG. 4), and a substantially horizontal mounting surface is also formed on the side of the front side frame 4 facing this. The front subframe 5 and the front side frame 4 are fastened by, for example, screwing a bolt in a substantially vertical direction from the lower surface side of the front subframe 5 after abutting the mounting surfaces.

  On the other hand, the intermediate connecting portion 56 is provided with a bracket 58 that protrudes upward toward the front side frame 4, and the front side frame 4 has a bracket 59 that protrudes downward toward the vertical member 21. The front sub frame 5 and the front side frame 4 are connected via the bracket 58 on the front sub frame 5 side and the bracket 59 on the front side frame 4 side.

  The brackets 58 and 59 are formed in a substantially square-shaped closed cross section or a substantially U-shaped open cross section, and both are fitted to each other. In particular, here, the bracket 58 is fitted into the bracket 59. The brackets 58 and 59 are fastened to each other by screwing the bolts 60 in a substantially horizontal direction with the brackets 58 and 59 fitted.

  In this way, the intermediate connecting portion 56 in the front subframe 5 is connected by fitting the bracket 58 on the front subframe 5 side and the bracket 59 on the front side frame 4 side. As a result, the rigidity of the connecting portion 56 is improved, the input of vibration energy is reduced, and at the same time, vibration transmission from the front subframe 5 to the vehicle body side can be suppressed.

  Here, as shown in FIG. 2, the rear end side connecting portion 57 of the left and right front subframes 5 extends rearward from the rear side member 23, and the left and right rear end side connecting portions are connected. A brace 65 extending in the left-right direction of the vehicle body is provided in such a manner that the portions 57 are connected to each other.

  Thus, since the left and right connecting portions 57 of the front subframe 5 with respect to the left and right front side frames 4 are connected to each other by the brace 65, both the rigidity of the front subframe 5 and the front side frame 4 that supports the front subframe 5 are supported. Can be increased. For this reason, vibration energy input from the suspension arm 32 to the vehicle body side is reduced, and vibration transmitted to the dashboard lower panel 3 and the surface members such as a floor panel and a window glass (not shown) via the front side frame 4 is suppressed. And since the vibration of those surface members can be suppressed, the low middle frequency road noise (100-500 Hz) which is the unpleasant noise which generate | occur | produces in a vehicle interior can be reduced.

  In particular, in order to reduce the noise in the passenger compartment when the vehicle is running, as shown in FIG. 3, it is transmitted from the rear arm support portion 46 close to the dashboard lower panel 3 to the vehicle body side in the front subframe 5. Although vibration becomes a problem, in this embodiment, the connecting portions 57 on the left and right rear end sides are connected to each other by the brace 65 so that the rear arm support portion 46 passes through the connecting portion 57 on the rear end side. Since the rigidity on the vibration transmission path through which the vibration is transmitted to the front side frame 4 can be increased, the vibration transmitted to the dashboard lower panel 3 can be effectively suppressed.

  Further, the rear side member 23 has a widened portion 67 widened in the longitudinal direction of the vehicle body on both the left and right sides. The widened portion 67 is formed so that the width gradually increases toward the outside in the left-right direction of the vehicle body. Further, as shown in FIG. 5, the widened portion 67 is joined in a region from the intermediate connecting portion 56 to the connecting portion 57 on the rear end side in the vertical member 21. A rear arm support portion 46 that supports the suspension arm 32 is provided in the vicinity of the intermediate coupling portion 56 in the vertical member 21.

  Thereby, the strength of the arm support portion 46 of the vertical member 21 can be increased and the support rigidity can be improved. The widened portion 67 of the horizontal member 23 is formed so as to gradually increase in width toward the outer side in the left-right direction of the vehicle body, so that the front end portion 68 located in the vicinity of the connecting portion 57 on the rear end side has a small cross section. However, since the front end portion 68 is reinforced by the brace 65, the rigidity of the entire front subframe 5 can be improved, and further, the rigidity of the vehicle body side that supports the front subframe 5 can be improved.

  Further, as shown in FIG. 3, the left and right vertical members 21 have a bent portion 71 that is concave on the outer side in the left-right direction of the vehicle body, and another member related to the front suspension 6 is outside the bent portion 71. A placement space is defined. Thereby, the design freedom of the front suspension 6 can be improved. In addition, the bent portion 71 is provided with an arm support portion 46 that supports the suspension arm 32. For this reason, the arm length of the suspension arm 32 can be ensured. Further, an arrangement space for the stabilizer 39 is defined outside the bent portion 71.

  Further, as described above, the lateral member 23 on the rear side has the widened portions 67 on both the left and right sides, and the end of the widened portion 67 is an area that extends over substantially the entire bent portion 71 of the vertical member 21. It is joined. Accordingly, the rear horizontal member 23 joined to the bent portion 71 of the vertical member 21 and the brace 65 connected to the rear end of the vertical member 21 support the bent portion 71 of the vertical member 21. Therefore, a decrease in rigidity due to the bent portion 71 can be suppressed.

  FIG. 6 is a front view of the dashboard lower panel 3 as viewed from the front of the vehicle body. In FIG. 6, the front subframe 5 is cut at a position immediately before the brace 65, so that cross sections of the vertical member 21 and the rear side member 23 of the front subframe 5 appear.

  A rear end portion 51 of the front side frame 4 is joined to the dashboard lower panel 3. The dashboard lower panel 3 is provided with a dash cross member 73 extending in the left-right direction of the vehicle body. Further, the dashboard lower panel 3 has a tunnel front end portion 74 having a substantially U shape with a lower side opened at a center portion in the left-right direction of the vehicle body. The tunnel front end 74 is joined to a tunnel portion (not shown) provided so as to extend in the vehicle longitudinal direction at the center of the floor panel (not shown) in the vehicle lateral direction.

  The brace 65 is disposed below the tunnel front end 74 of the dashboard lower panel 3. Accordingly, since the brace 65 restrains the displacement of the tunnel front end portion 74 on the opened lower end portion 74a side, the tunnel front end portion 74 is prevented from being deformed so as to expand as shown by an arrow in FIG. be able to.

  Here, the vibration from the suspension arm 32 is transmitted to the dashboard lower panel 3 via the front sub-frame 5 and the front side frame 4, so that the tunnel front end 74 is expanded and deformed by the vibration generated in the dashboard lower panel 3. However, the brace 65 prevents the tunnel front end 74 from being expanded and deformed. For this reason, since the volume change in the passenger compartment due to the deformation of the tunnel portion can be suppressed, the noise in the passenger compartment caused by running vibration can be further reduced.

  FIG. 7 is a perspective view showing the connecting portion 81 of the brace 65 with respect to the front subframe 5. FIG. 7 shows the vehicle body right side of the brace 65, and the vehicle body left side appears substantially symmetrically.

  The brace 65 is formed in a straight bar shape having a substantially L-shaped cross section by a side wall portion 82 and a lower wall portion 83 extending in a substantially orthogonal direction, and the side wall portion 82 is located behind the lower wall portion 83. Are arranged as follows. Further, the brace 65 is formed with bent portions 84 and 85 which are bent in a substantially L shape at the end edges of the side wall portion 82 and the lower wall portion 83. Thereby, the rigidity of the brace 65 can be increased.

  The connecting portion 57 on the rear end side of the vertical member 21 of the front sub-frame 5 with respect to the front side frame 4 has a substantially rectangular cross section by inner and outer side wall portions 86, 87, an upper wall portion 88 and a lower wall portion 89. On the inner side of the connecting portion 57 in the left-right direction of the vehicle body, a ridge line portion 90 formed by a side wall portion 86 and a lower wall portion 89 extending in a substantially orthogonal direction is formed.

  The connecting portion 81 of the brace 65 is also formed with a ridge line portion 91 formed by the side wall portion 82 and the lower wall portion 83, and the ridge line portion 91 of the brace 65 is continuous with the ridge line portion 90 of the vertical member 21. Thus, the side wall 82 of the brace 65 is formed in a shape bent in a direction along the side wall 86 of the vertical member 21. Further, the lower wall portion 83 of the brace 65 is arranged along the lower wall portion 89 of the vertical member 21. Thereby, the cross-sectional center line C of the brace 65 is bent backward so as to be directed to the connecting portion 57 on the rear end side from the left-right direction of the vehicle body.

  Moreover, in this connection part 81, the side wall part 82 and the lower wall part 83 of the brace 65 are joined to the inner side wall part 86 and the lower wall part 89 of the vertical member 21 which respectively oppose. In particular, here, the widened portion 67 of the rear side member 23 is extended to the connecting portion 57 on the rear end side of the vertical member 21, and the front end portion 92 of the horizontal member 23 is located inside the vertical member 21. While being joined to the side wall portion 86 and the lower wall portion 89, the side wall portion 82 and the lower wall portion 83 of the brace 65 are joined to the distal end portion 92 of the lateral member 23. Thereby, the connection part 81 of the brace 65 is joined to the vertical member 21 via the horizontal member 23.

  By configuring the connecting portion 81 of the brace 65 in this manner, the rigidity in the left-right direction of the vehicle body of the connecting portion 57 on the rear end side of the vertical member 21 can be improved. Since the brace 65 has a substantially L-shaped cross section, the rigidity in the vertical direction of the vehicle body and the longitudinal direction of the vehicle body can be increased. Can be suppressed.

  In the present embodiment, the strut type front suspension 6 has been described as an example. However, the present invention is not limited to such a type of front suspension, and other types of front suspensions such as a wishbone type are used. It is also possible to apply to.

  In this embodiment, the brace 65 has a substantially L-shaped cross section. However, the present invention is not limited to such a brace, and for example, has a circular or rectangular cross section. Things are also possible.

1 Engine compartment 2 Car compartment 3 Dashboard lower panel 4 Front side frame 5 Front subframe 6 Front suspension 21 Vertical member 22 Front side member 23 Rear side member 32 Suspension arm 43 Front arm part 44 Rear arm parts 45, 46 Arm support part 55 Front end side connection part 56 Intermediate connection part 57 Rear end side connection part 58, 59 Bracket 65 Brace 67 Widening part 71 Bending part 74 Tunnel front end part 81 Connection part 82 Side wall part 83 Lower wall part 84, 85 Bent part 90 Ridge part 91 Ridge part

Claims (7)

A dashboard lower panel that partitions the vehicle compartment and the engine room, left and right front side frames that extend forward from the dashboard lower panel, and a front subframe that is supported by the front side frame and supports the suspension arm In the front body structure of an automobile equipped with
The front sub-frame is configured in a substantially rectangular shape in plan view by left and right vertical members extending in the vehicle body front-rear direction and front and rear horizontal members extending in the vehicle body left-right direction,
The left and right vertical members have arm support portions for supporting the suspension arm, and have connecting portions for the front side frame at least on the front end side and the rear end side,
The rear end connecting portion of the left and right vertical members extends rearward from the rear lateral member, and extends in the left-right direction of the vehicle body in such a manner as to connect the left and right rear end connecting portions to each other. An automobile body front structure characterized in that a brace is provided. The dashboard lower panel has a tunnel front end portion that is substantially U-shaped in a front view in which a lower side is opened at a center portion in a vehicle body left-right direction,
The vehicle body front structure according to claim 1, wherein the brace is disposed below the tunnel front end. The vertical member has a ridge line portion formed by a side wall portion and a lower wall portion on the vehicle body left-right direction inner side in the connecting portion on the rear end side,
The brace is formed in a substantially straight rod shape having a substantially L-shaped cross section by a side wall portion and a lower wall portion, and has a ridge line portion formed by the side wall portion and the lower wall portion,
In the connecting portions at the left and right ends of the brace, the side wall portion on the brace side is connected to the side wall portion on the vertical member side so that the ridge line portion of the brace is continuous with the ridge line portion of the vertical member. The side wall portion and the lower wall portion on the brace side are joined to the side wall portion and the lower wall portion on the vertical member side, respectively, and are formed in a shape bent along the direction. The vehicle body front part structure according to claim 1 or 2. The left and right vertical members have connecting portions for the front side frame at three locations, the front end side and the rear end side, and the middle thereof, and the arm support portion is provided in the vicinity of the intermediate connecting portion,
The lateral member on the rear side has a widened portion that is widened in the longitudinal direction of the vehicle body on both the left and right sides, and the widened portion is joined in a region from the intermediate connecting portion to the connecting portion on the rear end side in the vertical member. The vehicle body front part structure according to any one of claims 1 to 3, wherein the vehicle body front part structure is provided. The left and right vertical members have connecting portions for the front side frame at three locations, the front end side and the rear end side, and the middle thereof.
The intermediate connecting portion of the vertical member is provided with a bracket that protrudes upward toward the front side frame, and the front side frame is provided with a bracket that protrudes downward toward the vertical member, The vehicle body according to any one of claims 1 to 4, wherein the bracket on the vertical member side and the bracket on the front side frame side are connected to each other by being fitted to each other. Front structure. The left and right vertical members have bent portions that are concave on the outside in the left-right direction of the vehicle body,
The vehicle body front structure according to any one of claims 1 to 5, wherein the rear lateral member is joined to the bent portion. The brace is formed in a substantially straight rod shape having a substantially L-shaped cross section by a side wall portion and a lower wall portion,
The body of the automobile according to any one of claims 1 to 6, wherein a bent portion that is bent in a substantially L shape is formed at end edges of the side wall portion and the lower wall portion. Front structure.

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