JP2015137034A - suspension frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension frame structure capable of improving rigidity while suppressing increase in weight.SOLUTION: A suspension frame structure 1 includes: a substantially planar body plate 11; an engine mount attachment part 12 disposed on the body plate 11; and left and right body attachment members 13, 14 respectively disposed left and right on the front of the body plate 11, so as to sandwich the engine mount attachment part 12 therebetween, and respectively having body attachment parts 33, 34 to which a vehicle body is to be attached. The body attachment members 13, 14 respectively have plate-like parts 31, 32 with width widening from the engine mount attachment part side toward the body attachment part sides, and the plate-like parts 31, 32 are disposed standing with respect to a surface of the body plate 11. The body attachment parts 33, 34 are provided at top ends on the sides away from the body plate and the engine mount attachment part, in the body attachment members 13, 14.

Description

  The present invention relates to a suspension frame structure that supports a lower arm of a suspension.

  In the suspension frame structure, it is required to improve the rigidity of the main body portion in order to efficiently transmit the force from the lower arm. In order to realize this, as shown in Patent Document 1, for example, a suspension frame structure having a closed cross-sectional structure in which an upper plate and a lower plate are overlapped and a space is provided between the plates has been devised.

  In the suspension frame structure shown in Patent Document 1, an upper plate and a lower plate are overlapped to form a hollow member body. Lower arms are swingably attached to the front left and right and rear left and right of the member body. The front end of the member body is formed in a bow shape. More specifically, the front end of the member main body has a wall surface that constitutes a side surface portion of the upper plate, which is curved and recessed with respect to a straight line connecting two lower arm mounting portions disposed on the front left and right sides of the member main body. It has a curved shape. This is to secure a region where a part of the engine is disposed.

JP 2008-1307 A

  However, when the side surface of the upper plate constituting the front end of the member body is formed in a curved surface shape as in the suspension frame structure described above, the force is transmitted from the lower arm to the member body at the inflection point on the side surface of the curved surface shape. Loss occurs.

  In order to ensure the rigidity of the member body in consideration of such a loss of force transmission, the upper plate and the lower plate are overlapped to constitute the member body as described above, and each plate is further constituted. It is also conceivable to increase the plate thickness of the plate material. However, in such a case, there arises a problem that the weight of the suspension frame structure increases.

  In view of the above problems, the present invention provides a suspension frame structure capable of further improving rigidity while suppressing an increase in weight.

In order to solve the above problems, the suspension frame structure according to the present invention is
A substantially flat body plate;
An engine mount mounting portion disposed on the body plate;
Left and right body mounting members disposed on the front left and right on the main body plate with the engine mount mounting portion in between, and having a body mounting portion to which a vehicle body is mounted;
A suspension frame structure comprising:
The body attachment member has a plate-like portion that increases in width from the engine mount attachment portion side toward the body attachment portion side, and the plate-like portion is erected with respect to the surface of the main body plate. Are arranged,
The body attachment portion is provided at a top end portion of the body attachment member on the side away from the main body plate and the engine mount attachment portion.

  The suspension frame structure of the present invention is attached to a vehicle, supports a lower arm of the suspension, and transmits a force from the lower arm to each member such as a vehicle body. The suspension frame structure of the present invention is provided with a flat plate-shaped main body plate, an engine mount mounting portion disposed on the main body plate, and left and right body mounting members. In the suspension frame structure of the present invention, when mounted on a vehicle, the positions corresponding to the front side, rear side, left side, and right side of the vehicle are the front side, rear side, left side, and These are referred to as the right side.

  In the present invention, the body attachment members are disposed on the front left and right sides of the main body plate with the engine mount attachment portion interposed therebetween. Each body attachment member has a flat plate-like portion whose width increases from the engine mount attachment portion side toward the left and right end portions. And the body attaching part connected with a vehicle body is provided in the top end part of the left side or right side of each plate-shaped part.

  According to the above configuration, since the flat plate-shaped portion is formed from the engine mount mounting portion toward the front left and right ends, the force from the lower arm supported by the suspension frame structure can be reduced. It can be transmitted linearly to each member such as a vehicle body connected via the cable. That is, by transmitting the force from the lower arm linearly through the flat plate-like portion, it is possible to reduce the loss of force during transmission.

  Therefore, even if one main body plate is used as the base of the suspension frame structure, desired rigidity can be ensured. That is, according to the present invention, it is possible to provide a suspension frame structure with improved rigidity while suppressing an increase in weight.

  In the suspension frame structure of the present invention, the plate-like portions of the left and right body attachment members are provided with lower arm attachment portions to which left and right lower arms are respectively attached at corner portions present at positions below the top end portion. May be.

  According to said structure, a body attaching part and a lower arm attaching part are provided in the plate-shaped part which is the same member. Therefore, the force input from the lower arm to the suspension frame structure can be efficiently transmitted from the lower arm attachment portion to the body attachment portion via the plate-like portion. Thereby, the loss of transmission of force from the lower arm can be further reduced.

  In the suspension frame structure of the present invention, a through hole is formed in the lower arm mounting portion, and left and right lower arms for assisting the support of the lower arm with respect to the lower arm mounting portion on the front side of the lower arm mounting portion. An attachment auxiliary member is provided, and a second through hole may be formed in the lower arm attachment auxiliary member at a position facing the through hole of the lower arm attachment portion.

  According to the above configuration, the lower arm swings around the support shaft by passing the support shaft of the lower arm between the through hole of the lower arm mounting portion and the second through hole provided at the corresponding position. It can be supported as possible.

  In the suspension frame structure of the present invention, rear left and right end portions on the main body plate are provided with rear side mounting members to which the vehicle body is mounted, and the rear side mounting members are connected to the engine mount mounting portion. You may provide the linear part extended toward the attachment position of the said vehicle body.

  According to the above configuration, the force transmitted from the lower arm to the engine mount mounting portion via the plate-shaped portion can be efficiently transmitted from the engine mount mounting portion to the vehicle body via the linear portion. . Thereby, the loss of transmission of force from the lower arm can be further reduced, and the rigidity of the suspension frame structure can be further increased.

  In the suspension frame structure of the present invention, left and right reinforcing members are provided on the main body plate from the back side of the plate-shaped portion toward the left and right end portions on the rear side of the main body plate. May include a linear portion extending from the back side of the plate-like portion toward the mounting position of the vehicle body on the rear side of the main body plate.

  According to the above configuration, the force transmitted from the lower arm to the plate-like portion of the body attachment member is efficiently transmitted from the back surface of the plate-like portion to the vehicle body attachment position on the rear side of the body plate via the linear portion. Can be made. Thereby, the loss of transmission of force from the lower arm can be further reduced, and the rigidity of the suspension frame structure can be further increased.

It is a top view which shows the structure of the suspension frame structure concerning one Embodiment of this invention. FIG. 1 is a view of the suspension frame structure as viewed from above. It is a perspective view at the time of seeing the suspension frame structure shown in FIG. 1 from the front left side. It is a perspective view at the time of seeing the suspension frame structure shown in FIG. 1 from back left side. It is a side view at the time of seeing the suspension frame structure shown in FIG. 1 from the front side. It is a side view at the time of seeing the suspension frame structure shown in FIG. 1 from the back side. It is a disassembled perspective view which decomposes | disassembles and shows each component which comprises the suspension frame structure shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, when the suspension frame structure according to the present embodiment is mounted on a vehicle, the positions corresponding to the front side, the rear side, the left side, and the right side of the vehicle are set to the front side of the suspension frame structure. These are referred to as the rear side, the left side, and the right side, respectively.

  As shown in FIGS. 1 to 6, the suspension frame structure 1 includes a main body plate 11, an engine mount mounting member (engine mount mounting portion) 12, a body mounting member 13 (on the left side), a body mounting member 14 (on the right side), (Left side) rear body mounting member 15, (right side) rear body mounting member 16, (left side) lower arm mounting auxiliary member 17, (right side) lower arm mounting auxiliary member 18, (left side) reinforcing member 19, A reinforcing member 20 (on the right side), a back surface mounting member 21 (on the left side), and a back surface mounting member 22 (on the right side) are provided as main components.

  The main body plate 11 constitutes the base of the suspension frame structure 1, and each component is placed on the main body plate. The main body plate 11 is a flat plate-like member having a substantially constant thickness over the entire region, and is formed, for example, by pressing. Further, the shape of the main body plate 11 can be appropriately changed according to the specification of the vehicle on which the suspension frame structure 1 is mounted. In the present embodiment, the outline of the front end of the main body plate 11 has a curved shape that is curved and recessed from the left and right ends toward the center. This is to secure a region where a part of the engine is disposed.

  As shown in FIG. 6, lower arm attachment points 101 and 102 connected to the lower arm 100 schematically shown in FIG. A through hole is formed in the lower arm attachment points 101 and 102, and a support shaft (not shown) formed in the lower arm 100 is inserted into the through hole. Thus, the rear side of the lower arm 100 is supported so as to be swingable about the support shaft. Further, on both the left and right sides on the rear side of the main body plate 11, through holes 103 and 105 are formed at positions connected to the vehicle body, and through holes 104 and 106 are formed at positions connected to a steering (not shown). ing. Pipe-like body support members 103a and 105a through which bolts for connecting the suspension frame structure 1 and the vehicle body pass are respectively attached around the through holes 103 and 105, for example, by welding. In addition, pipe-like steering support members 104a and 106a through which bolts for connecting the suspension frame structure 1 and the steering pass are attached around the through holes 104 and 105, for example, by welding.

  The engine mount mounting member 12 (corresponding to the engine mount mounting portion of the present invention) is a member to which an engine mount (not shown) is mounted, and is disposed at a substantially central portion on the main body plate 11. A nut 81 is disposed at the engine mount mounting position of the engine mount mounting member 12. In addition, the arrangement position of the engine mount mounting member 12 on the main body plate 11 can be appropriately changed according to the specification of the vehicle. The engine mount mounting portion 12 can be formed into a shape having a U-shaped cross section as shown in FIG. The engine mount mounting portion 12 is fixed to the surface of the main body plate 11 by welding. In order to facilitate welding of the engine mount mounting portion 12 to the main body plate 11, an end portion of the engine mount mounting portion 12 (an end portion in contact with the main body plate 11) is connected to an end portion of the engine mount mounting portion 12. A flange portion formed by bending a metal plate may be formed.

  The left and right body attachment members 13 and 14 are arranged on the left and right sides on the front side of the main body plate 11 with the engine mount attachment member 12 interposed therebetween. The left body attachment member 13 and the right body attachment member 14 extend from the engine mount attachment portion 12 toward the left and right ends, respectively. The body attachment members 13 and 14 are provided with body attachment portions 33 and 34 for connection to a vehicle body disposed above the suspension frame structure 1, respectively. The body attachment members 13 and 14 are provided with front lower arm attachment portions 35 and 36 to which lower arms 100 (not shown for the left lower arm) schematically shown in FIG. 1 are attached, respectively.

  As shown in FIGS. 4 and 6, the body attachment members 13 and 14 include plate-like portions 31 and 32 that increase in width from the engine mount attachment member 12 side toward the body attachment portions 33 and 34. It is out. The plate-like parts 31 and 32 are flat plate-like members having a substantially constant thickness over the whole. The body attachment members 13 and 14 can be formed into a shape as shown in FIG. 6 by pressing a plate material, for example.

  FIG. 4 shows a side view of the front side of the suspension frame structure 1. As shown in this figure, the more specific shapes of the plate-like portions 31 and 32 are such that the upper end portions of the plate-shaped portions 31 and 32 are curved as they go from the connection location to the respective engine mount attachment portions 12 to the left and right sides. It has a beautiful outline. That is, the width of the plate-like portions 31 and 32 is larger on the side closer to the body attachment portions 33 and 34 at the left and right top ends than on the side closer to the engine mount attachment portion 12. Thereby, as shown in FIG. 4, a flat wall surface is formed by the plate-like portions 31 and 32 on the front side of the suspension frame structure 1. Further, due to the outline of the upper end portions of the plate-like portions 31 and 32 as described above, the top portion is recessed with the engine mount mounting portion 12 interposed therebetween. Thereby, the arrangement | positioning area | region of an engine can be ensured. In the present embodiment, in the plate-like portion 31 and the plate-like portion 32, the shapes around the body attachment portions 33 and 34 and the shapes around the lower arm attachment portions 35 and 36 are symmetrical. However, the present invention is not limited to such a shape.

  The plate-like portions 31 and 32 are erected and fixed to the main body plate 11 so as to be substantially perpendicular to the surface of the main body plate 11. In order to facilitate welding of the plate-like portions 31 and 32 to the surface of the main body plate 11, a metal is applied from the plate-like portion to one end portion of the plate-like portions 31 and 32 (an end portion in contact with the main body plate 11). A flange portion formed by bending the plate may be formed.

  Further, in the body attachment members 13 and 14, the body attachment portions 33 and 34 are arranged at the top end portion located at the uppermost position when the plate-like portions 31 and 32 are arranged upright with respect to the main body plate 11. . The structure of the body attachment portions 33 and 34 can be appropriately changed according to the structure of the attachment portion on the vehicle body side to be connected. In the present embodiment, the body attachment portions 33 and 34 are configured by forming through holes in flange portions that are bent at substantially right angles from the top ends of the plate-like portions 31 and 32.

  In the body attachment members 13 and 14, the front lower arm attachment portions 35 and 36 are formed at one corner of the plate-like portions 31 and 32. More specifically, the front lower arm attachment portions 35 and 36 form through holes in corner portions of the plate-like portions 31 and 32 that are present at positions below the top end portions where the body attachment portions 33 and 34 are provided. It is formed by doing. The corner portion is in the vicinity of the connection position with the main body plate 11 in the plate-like portion 31 and can also be referred to as the left corner portion. Further, in the plate-like portion 32, the corner portion is in the vicinity of the connection position with the main body plate 11, and can also be called a right end corner portion.

  The left and right lower arm attachment auxiliary members 17 and 18 are attached to the front sides of the left and right body attachment members 13 and 14, respectively. As shown in FIGS. 2 and 6, the lower arm attachment auxiliary members 17 and 18 are attached so as to close the lower arm attachment portions 35 and 36 (that is, through holes) of the body attachment members 13 and 14 from the front side. Yes. The lower arm attachment auxiliary members 17 and 18 can be processed into a shape shown in FIG. 6, for example, by pressing a single plate-like member. The lower arm attachment auxiliary members 17 and 18 are welded and fixed onto the main body plate 11 in the same manner as the body attachment members 13 and 14.

  The lower arm attachment auxiliary members 17 and 18 have second through holes 41 at positions corresponding to the lower arm attachment portions 35 and 36 (that is, the through holes) of the body attachment members 13 and 14 when viewed from the front side. , 42 are formed. A front support shaft (not shown) formed in the left lower arm is inserted into the through hole of the lower arm attachment portion 35 and the second through hole 41. Similarly, a front support shaft (not shown) formed on the right lower arm is inserted into the through hole of the lower arm attachment portion 36 and the second through hole 42. Thereby, the front side of each lower arm is supported so as to be swingable about the support shaft.

  As described above, in the suspension frame structure 1 of the present embodiment, the flat plate portions 31 and 32 are formed from the engine mount mounting portion 12 toward the front left and right ends. As a result, as indicated by the broken line arrow A in FIG. 1, the force from the lower arm can be transmitted linearly to each member connected via the suspension frame structure 1. By transmitting the force linearly through the flat plate portions 31 and 32, it is possible to reduce the loss of force during transmission. In FIG. 1, the transmission of force from the right lower arm 100 is schematically shown, but the force is similarly transmitted from the left lower arm. Therefore, the force transmitted from the lower arm to each member such as the vehicle body via the suspension frame structure 1 as compared with the case where the front side surface of the upper plate is formed in a curved shape as in the conventional suspension frame structure. Loss can be reduced. Therefore, the rigidity of the suspension frame structure 1 can be ensured by the single body plate 11 without forming the member body by two members, that is, the upper plate and the lower plate as in the prior art.

  Furthermore, in the suspension frame structure 1 of the present embodiment, the plate-like portions 31 and 32 are provided with body attachment portions 33 and 34 that are connected to the body, and lower arm attachment portions 35 and 36 that are connected to the lower arm, respectively. Thereby, transmission of force from the lower arm to the vehicle body can be performed more efficiently.

  As shown in FIG. 5, rear mounting members 21 and 22 for reinforcing the body mounting members 13 and 14 are provided on the rear surfaces (rear surfaces) of the plate-like portions 31 and 32 of the body mounting members 13 and 14. May be attached respectively. The back surface mounting members 21 and 22 are disposed so as to cover the periphery of the lower arm mounting portions 35 and 36 particularly on the back surfaces of the plate-shaped portions 31 and 32.

Next, the configuration on the rear side of the suspension frame structure 1 will be described.
Rear body attachment members (rear attachment members) 15 and 16 are respectively provided on the left and right sides of the suspension frame structure 1 with the engine mount attachment portion 12 therebetween.

  Further, as shown in FIG. 3, reinforcing members 19 and 20 are provided on the left and right sides of the suspension frame structure 1 from the back surfaces of the body mounting members 13 and 14 to the rear end portions, respectively. The reinforcing members 19 and 20 are members for further strengthening the rigidity of the suspension frame structure 1. As shown in FIG. 5, the reinforcing members 19 and 20 are disposed on the back side of the plate-like portions 31 and 32 and between the main body plate 11 and the rear body attaching members 15 and 16. As shown in FIG. 3, the reinforcing members 19 and 20 are arranged such that their front end portions are in contact with the back surfaces of the plate-like portions 31 and 32 in the vicinity of the lower arm attachment portions 35 and 36. The reinforcing members 19 and 20 are arranged so that rear end portions thereof cover the through holes 103 and 105 for connecting the vehicle body of the main body plate 11, respectively.

  As shown in FIGS. 4 and 6, the reinforcing members 19 and 20 have upper surfaces 61 and 62 and side surfaces 63 and 64, respectively. The upper surfaces 61 and 62 and the side surfaces 63 and 63 are formed by bending a single metal plate at a substantially right angle. A bent portion between the upper surface 61 and the side surface 63 is a substantially linear line portion 19a. Further, the bent portion between the upper surface 62 and the side surface 64 is a substantially linear line portion 20a.

  Body attachment points 65, 66, steering attachment through holes 67, 68, and stabilizer attachment points 71, 72 are provided on the upper surfaces 61, 62 of the reinforcing members 19, 20, respectively. In the present embodiment, these attachment points are realized in the form of through holes. Body attachment points 65 and 66 are provided at connection positions with a vehicle body (not shown). The body attachment points 65 and 66 are provided at positions corresponding to the body support members 103 a and 105 a disposed on the main body plate 11. The steering attachment through holes 67 and 68 are provided at a connection position with a steering (not shown). The steering attachment through holes 67 and 68 are provided at positions corresponding to the steering support members 104 a and 106 a arranged on the main body plate 11. Steering support members 104a and 106a pass through the steering attachment through holes 67 and 68, respectively. The stabilizer attachment points 71 and 72 are provided at a connection position with a stabilizer (not shown). The arrangement positions of these attachment points can be appropriately changed according to the specification of the vehicle on which the suspension frame structure 1 is mounted.

  In the present embodiment, the linear portion 19a and the linear portion 20a are arranged so that the body mounting position on the rear side from the vicinity of the lower arm mounting portions 35, 36 of the body mounting members 13, 14 (specifically, each body mounting point 65, 66).

  The reinforcing members 19 and 20 are welded and fixed onto the main body plate 11 like the other members. The rear body attachment members 15 and 16 are disposed on the reinforcement members 19 and 20. The rear body attaching members 15 and 16 are fixed by welding on the upper surfaces of the reinforcing members 19 and 20.

  The rear body attachment members 15 and 16 are provided with lower arm attachment points 51 and 52, body attachment points 53 and 54, and steering attachment points 55 and 56, respectively. The lower arm attachment points 51 and 52 are places to which the connecting portions on the rear side of the lower arm are attached, and are realized as through holes, for example. And each said through-hole is arrange | positioned in the position corresponding to each through-hole of the lower arm attachment points 101 and 102 provided on the main body plate 11 mentioned above seeing from the upper side. Thereby, like each through hole of the lower arm attachment points 101 and 102, a support shaft (not shown) formed in the lower arm 100 is inserted into the through hole. Thus, the rear side of the lower arm 100 is supported so as to be swingable about the support shaft.

  Moreover, the body attachment points 53 and 54 are locations where a part of the vehicle body is attached, and are realized as through holes, for example. Each through hole is provided at a position corresponding to the body support members 103 a and 105 a arranged on the main body plate 11. For example, the bolt passes from the through holes 103 and 105 provided in the body plate 11 through the pipes of the body support members 103a and 105a, and the through holes of the body attachment points 65 and 66 of the reinforcing members 19 and 20, The vehicle body can be attached to the suspension frame structure 1 by being fastened to the vehicle body (not shown) through the through holes of the body attachment points 53 and 54 of the rear body attachment members 15 and 16.

  Further, the steering attachment points 55 and 56 are portions connected to the steering of the vehicle, and are realized as through holes, for example. Each through hole is provided at a position corresponding to the steering support members 104 a and 106 a disposed on the main body plate 11. For example, the bolt passes through the pipes of the steering supporting members 104a and 106a from the through holes 104 and 106 provided in the main body plate 11, passes through the steering mounting through holes 67 and 68 of the reinforcing members 19 and 20, and the rear side. The steering can be attached to the suspension frame structure 1 by being fastened to the steering (not shown) through the through holes of the steering attachment points 55 and 56 of the body attachment members 15 and 16.

  Further, the rear body attachment members 15 and 16 are substantially linear linear portions extending from a connection position with the engine mount attachment portion 12 to an attachment position of the vehicle body (in this embodiment, body attachment points 53 and 54). 15a and 16a are provided. As described above, the suspension frame structure 1 may be provided with a member extending linearly from the engine mount mounting portion 12 to the left and right body mounting positions. As a result, as shown in FIG. 1, the force (indicated by the broken arrow A) linearly transmitted from the lower arm 100 to the engine mount mounting portion 12 via the flat plate-like portion 32 of the body mounting member 14 continues. Then, it is transmitted linearly from the engine mount mounting portion 12 to the body mounting point 53 via the linear portion 15a of the rear body mounting member 15 (indicated by a broken line arrow B). By transmitting the force linearly through the linear portion, it is possible to reduce the loss of force during transmission. In FIG. 1, the transmission of force from the right lower arm 100 is schematically shown, but the force is similarly transmitted from the left lower arm.

  With the above configuration, the force input from the lower arm can be more efficiently transmitted to each member such as the vehicle body via the suspension frame structure 1. Therefore, even when the single main body plate 11 is a base of the suspension frame structure 1, desired rigidity can be ensured.

  Further, in the present embodiment, the reinforcing members 19 and 20 include a linear portion 19a and a linear portion 20a, and the linear portions 19a and 20a are arranged from the vicinity of the lower arm attachment portions 35 and 36 to the rear side. Each extends substantially linearly toward the body mounting position. Thereby, as shown by the broken line arrow C in FIG. 1, the force entered from the lower arm can be efficiently transmitted toward the rear body mounting position. FIG. 1 schematically shows the transmission of force from the right lower arm 100 to the rear body attachment position (specifically, the body attachment point 54). Power is transmitted. Thereby, the rigidity of suspension frame structure 1 can be raised more.

  The example of the embodiment of the present invention has been described above. However, the present invention is not limited to the embodiments described above, and can be implemented in various modes without departing from the gist of the present invention. Further, configurations obtained by appropriately combining different embodiments are also included in the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Suspension frame structure, 11 ... Main body plate, 12 ... Engine mount attachment member (engine mount attachment part), 13 ... (Left side) body attachment member, 14 ... (Right side) body attachment member, 15 ... (Left side) Rear body mounting member (rear mounting member), 15a ... linear portion, 16 ... (right side) rear body mounting member (rear side mounting member), 16a ... linear portion, 17 ... (left side) lower arm mounting Auxiliary member, 18 ... (right side) lower arm attachment auxiliary member, 19 ... (left side) reinforcing member, 19a ... linear part of left side reinforcing member, 20 ... (right side) reinforcing member, 20a ... (right side reinforcing member) ) Linear portion, 21... (Left side) back mounting member, 22... (Right side) back mounting member.

  31 ... (left side) plate-like part, 32 ... (right side) plate-like part, 33 ... (left side) body attaching part, 34 ... (right side) body attaching part, 35 ... (left side) lower arm attaching part ( (Through hole), 36 (right side) lower arm attachment part (through hole), 41 ... (left side) second through hole, 42 ... (right side) second through hole, 51 ... (left rear side) Lower arm attachment point, 52 ... (right rear side) lower arm attachment point, 53 ... (left rear side) body attachment point (vehicle body attachment position), 54 ... (right rear side) body attachment point (vehicle body (Mounting position), 55 ... (Left side) steering attachment point, 56 (Right side) steering attachment point, 61 ... (Left side reinforcing member) upper surface, 62 ... (Right side reinforcing member) upper surface, 63 ... (Left side reinforcing member) Side), 64... (Right side reinforcing member) side surface, 65... (Left side reinforcing member) Attachment point, 66 ... body attachment point (for the right side reinforcement member), 67 ... through hole for steering attachment, 68 ... (through the right side reinforcement member) steering attachment through hole, 71 ... (left side reinforcement member) ) Stabilizer mounting point, 72... (Stabilizer mounting point of right side reinforcing member), 81... Nut (engine mount mounting position).

  DESCRIPTION OF SYMBOLS 100 ... Lower arm, 101 ... Lower arm attachment point, 102 ... (Right) lower arm attachment point, 103-106 ... Through-hole, 103a ... (Left side) body support member, 105a ... (Right side) body support member 104a (left side) steering support member, 106a (right side) steering support member.

Claims (5)

A substantially flat body plate;
An engine mount mounting portion disposed on the body plate;
Left and right body mounting members disposed on the front left and right on the main body plate with the engine mount mounting portion in between, and having a body mounting portion to which a vehicle body is mounted;
A suspension frame structure comprising:
The body attachment member has a plate-like portion that increases in width from the engine mount attachment portion side toward the body attachment portion side, and the plate-like portion is erected with respect to the surface of the main body plate. Are arranged,
The suspension frame structure according to claim 1, wherein the body attachment portion is provided at a top end portion of the body attachment member on the side away from the main body plate and the engine mount attachment portion.   The plate-like portions of the left and right body attachment members are provided with lower arm attachment portions to which left and right lower arms are respectively attached at corner portions existing at positions below the top end portion. The suspension frame structure according to 1. A through hole is formed in the lower arm mounting portion,
On the front side of the lower arm mounting portion, left and right lower arm mounting auxiliary members for assisting support of the lower arm with respect to the lower arm mounting portion are provided,
The suspension frame structure according to claim 2, wherein the lower arm attachment assisting member has a second through hole formed at a position facing the through hole of the lower arm attachment portion. Rear left and right end portions on the main body plate are provided with rear attachment members to which the vehicle body is attached,
The suspension frame according to any one of claims 1 to 3, wherein the rear mounting member includes a linear portion extending from the engine mount mounting portion toward a mounting position of the vehicle body. Construction. On the main body plate, left and right reinforcing members are provided from the back side of the plate-shaped portion toward the left and right end portions on the rear side of the main body plate,
The said reinforcement member is equipped with the linear part extended toward the attachment position of the said vehicle body of the back side of the said main body plate from the back side of the said plate-shaped part, The any one of Claim 1 to 4 characterized by the above-mentioned. The suspension frame structure according to claim 1.

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