JP5561608B2 - Vehicle torque rod mounting structure - Google Patents

Description

  The present invention relates to a torque rod mounting structure for connecting an engine and an aluminum suspension member in order to suppress swinging of the engine in a vehicle.

  The engine, which is a drive source arranged in the engine room in the front part of the vehicle, is elastically supported by the vehicle body by a plurality of engine mounts, but the engine tends to swing due to torque fluctuations, rotation fluctuations, etc. accompanying throttle operation, etc. In order to oscillate with respect to the vehicle body by the amount of elastic deformation of the engine mount arranged so as not to transmit vibration to the vehicle body, the engine and suspension arm are connected by a connecting rod to suppress the engine oscillation. Yes.

  By the way, the suspension member to which one end of the torque rod is connected is disposed below the engine room of the vehicle, supports the left and right suspension arms so as to be able to swing up and down, and extends along the vehicle longitudinal direction on both the left and right sides of the engine room. This is a member for connecting a pair of apron side members arranged in order to increase the rigidity of the vehicle body.

  Conventionally, the suspension member is formed by welding a press-formed product of sheet metal, and a structure for attaching a torque rod to the suspension member has been proposed in, for example, Patent Document 1. That is, in Patent Document 1, an opening is formed between upper and lower plate members of a suspension member made of sheet metal formed in a hollow shape by upper and lower plate members, a reinforcing body is provided in the vicinity of the opening, and a torque rod is provided. There has been proposed an attachment structure in which one end of a (connector) is fitted into an opening and connected to a reinforcing body via a bush. According to this mounting structure, since both ends of the bolt for fixing the inner cylinder of the bush are supported in a supported state by the upper and lower plate members of the suspension member, the mounting rigidity of the torque rod to the suspension member is kept high.

  In Patent Document 2, as a structure for mounting a suspension member to a vehicle body, a lower end portion of a connecting bolt that connects an inner cylinder of a bush (mount insulator) that elastically supports the suspension member to a vehicle body side member is provided via a reinforcing stay. A configuration has been proposed in which the mounting bolt is supported at both ends by being fixed to the vehicle body side member.

  Incidentally, in recent years, for the purpose of reducing the weight and improving the productivity, the suspension member is integrally formed by casting (die casting or the like) with a lightweight aluminum alloy. Such an aluminum suspension member is integrally formed into a substantially horizontal upper wall and a cross-sectional shape in which the lower part is opened by a front wall and a rear wall extending downward from the front end edge and the rear end edge of the upper wall, respectively.

JP 2007-253642 A JP 2001-097241 A

  An aluminum suspension member that is integrally formed by a molding die cannot be formed into a closed cross-sectional structure like a sheet metal suspension member, and must have a cross-sectional shape with an open bottom. The bush attached to the suspension member must be fastened and fixed to the lower surface of the suspension member, and the bolt for fastening and fixing the inner cylinder of the bush is supported in a cantilevered state on the upper wall of the suspension member. There is a possibility that the bolt may fall down due to power, and it is difficult to keep the support rigidity high.

  The present invention has been made in view of the above problems, and an object thereof is to provide a torque rod mounting structure for a vehicle capable of improving workability and mounting rigidity of a torque rod to a suspension member. It is in.

In order to achieve the above object, the invention according to claim 1
An aluminum suspension member integrally formed of an aluminum alloy and having a substantially horizontal upper wall, and a cross-sectional shape having a lower portion opened by a front wall and a rear wall extending downward from front and rear edges of the upper wall;
An engine disposed in front of the aluminum suspension member;
A torque rod connecting the engine and the suspension member;
As a torque rod mounting structure for connecting the engine side end portion and suspension member side end portion of the torque rod of the vehicle having the above to the engine and the suspension member via an elastic bush,
The end of the torque rod on the suspension member side is disposed in the suspension member through a through hole formed in the front wall of the suspension member, and the end of the suspension member on the lower side of the bush provided on the suspension member. The bolt that is inserted from the fastening member is fastened and fixed to the upper wall of the suspension member, and the lower end portion of the bolt and the lower end portion of the front wall of the suspension member are connected by a connecting plate,
The connection plate is formed in a substantially triangular shape in plan view in which the front wall side of the suspension member is wide, and a plurality of locations on the front wall side are fixed to a lower end portion of the front wall of the suspension member;
The torque rod is arranged so as to intersect the side extending in the vehicle width direction on the front wall side among the sides constituting the triangle in plan view,
A front wall side end portion of the connecting plate is fastened and fixed to the left and right side positions of the through hole formed in the front wall of the suspension member .
The invention according to claim 2
An aluminum suspension member integrally formed of an aluminum alloy and having a substantially horizontal upper wall, and a cross-sectional shape having a lower portion opened by a front wall and a rear wall extending downward from front and rear edges of the upper wall;
An engine disposed in front of the aluminum suspension member;
A torque rod connecting the engine and the suspension member;
As a torque rod mounting structure for connecting the engine side end portion and suspension member side end portion of the torque rod of the vehicle having the above to the engine and the suspension member via an elastic bush,
The end of the torque rod on the suspension member side is disposed in the suspension member through a through hole formed in the front wall of the suspension member, and the end of the suspension member on the lower side of the bush provided on the suspension member. The bolt that is inserted from the fastening member is fastened and fixed to the upper wall of the suspension member, and the lower end portion of the bolt and the lower end portion of the front wall of the suspension member are connected by a connecting plate,
The front end edge of the connecting plate is bent upward, and the bent portion is disposed in front of the suspension member.

According to a third aspect of the present invention, in the second aspect of the present invention, the connecting plate is formed in a substantially triangular shape in plan view in which the front wall side of the suspension member is wide, and a plurality of locations on the front wall side are formed on the suspension member. It is characterized by being fixed to the lower end of the front wall.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the front wall side end of the connection plate is fastened and fixed to the left and right side positions of the through hole formed in the front wall of the suspension member. Features.

The invention according to claim 5 is the invention according to any one of claims 1 to 4 , wherein the front wall side end of the connecting plate is overlapped from below and tightened from below on the lower end mounting surface of the front wall of the suspension member. It is characterized by being attached.

According to the first aspect of the present invention, even in the case of an aluminum suspension member whose bottom is open, one end of the torque rod is passed through the through hole formed in the front wall of the suspension member so that the inside of the suspension member (upper wall) The torque rod is fixed to the upper wall of the suspension member by tightening a bolt inserted from below into the bush provided on the suspension rod. At the same time, since the lower end of the bolt and the lower end of the front wall of the suspension member are connected by a connecting plate, the bolt is securely supported in a state of being supported by both ends, and the fall of the bolt is prevented. The mounting rigidity of the engine is increased, and the swing of the engine is effectively suppressed by the torque rod. Further, since the torque rod and the connecting plate are attached by tightening from below, their attachment workability is improved. Furthermore, since the torque rod and the connecting plate are attached to the suspension member opened downward, it is not necessary to remove the torque rod from the bag-like attachment part to the engine side like a sheet metal suspension member having a hollow cross-sectional structure. Detachability of torque rod is improved.

According to the third aspect of the present invention, the connecting plate is formed in a substantially triangular shape in plan view with its front end side (suspension member front wall side) wide, and a plurality of locations on the front wall side are formed on the front wall of the suspension member. Since it is fixed to the lower end, the force acting on the torque rod from the engine side can be reliably received by the connecting plate and transmitted to the suspension member.

According to the fourth aspect of the present invention, the connecting plate is fastened and fixed to both the left and right positions of the through hole formed in the front wall of the suspension member to connect the left and right of the through hole. The front wall portion of the suspension member that is lowered is reinforced by the connection plate, and the front wall portion of the suspension member with increased rigidity can receive a force acting on the connection plate, and one end is attached to the suspension member having high rigidity. The torque rod effectively suppresses the swing of the engine.

According to the fifth aspect of the present invention, the front wall side end portion of the connecting plate is formed at the lower end of the front wall of the suspension member from below that is perpendicular to the vehicle longitudinal direction, which is the direction of transmission of force from the engine to the torque rod. Since the bolts that are the fasteners are prevented from being loosened by being overlapped and fixed on the mounting surface, the coupling plate is securely tightened and the durability thereof is improved. In particular, aluminum suspension members cannot withstand large tightening torques, but even with relatively small tightening torques, the connection plate can be securely tightened and fixed to the suspension members with high reliability. The transmitted force can be efficiently received by the connecting plate.

According to the second aspect of the present invention, the front end edge of the connecting plate extends forward, bends upward after passing through the lower portion of the front wall portion of the suspension member, and the bent portion is disposed in front of the suspension member. The front surface as well as the lower surface of the lower end of the front wall of the suspension member made of an aluminum alloy that is softer than the iron material and easily damaged can be protected by the bent portion of the connecting plate.

It is a side view which shows the vehicle body front part structure of a vehicle. It is a disassembled perspective view which shows the structure of the suspension system of a vehicle. It is a top view of a suspension member. It is a bottom view of a suspension member. It is a front view of a suspension member. It is a left view of a suspension member. It is a disassembled perspective view which shows a suspension arm attachment structure. It is the perspective view which looked at the attaching part which shows the assembly point of a suspension arm from diagonally downward. It is a fragmentary sectional side view which shows a suspension arm attachment structure. It is a perspective view which shows the assembly direction to the suspension member of a torque rod. It is a disassembled perspective view which shows the torque rod mounting structure which concerns on this invention. It is a sectional side view which shows the torque rod mounting structure which concerns on this invention. It is a perspective view of the connection plate which concerns on another form. FIG. 14 is a partial cross-sectional side view illustrating a relationship between a front end edge portion of the connection plate shown in FIG. 13 and a front wall lower end portion of a suspension member.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a side view showing a vehicle body front structure, FIG. 2 is an exploded perspective view showing the structure of a suspension system of the vehicle, FIG. 3 is a plan view of the suspension member, and FIG. 4 is a bottom view of the suspension member. 5 is a front view of the suspension member, FIG. 6 is a left side view of the suspension member, FIG. 7 is an exploded perspective view showing the suspension arm mounting structure, and FIG. FIG. 9 is a partial side cross-sectional view showing the suspension arm mounting structure, FIG. 10 is a perspective view showing the direction in which the torque rod is assembled into the suspension member, and FIG. 11 shows the torque rod mounting structure according to the present invention. FIG. 12 is a side sectional view showing the torque rod mounting structure.

  As shown in FIG. 1, a pair of left and right apron side members 1 (only one is shown in FIG. 1) are arranged in the engine room S in the front part of the vehicle along the vehicle front-rear direction (left-right direction in FIG. 1). A pair of left and right apron lower members 2 (only one is shown in FIG. 1) are disposed below the apron side members 1 along the vehicle front-rear direction. A radiator support lower member 3 arranged in the vehicle width direction (perpendicular to the plane of FIG. 1) is installed at the front ends of the pair of left and right apron lower members 2, and the apron side member 2 has a rear end at the rear end. A suspension member 4 disposed in the lower part of the engine room S is connected.

  Each apron side member 1 is composed of front and rear first and second horizontal portions 1A, 1B and an inclined inclined portion 1C that connects both horizontal portions 1A, 1B. A crash box 5 that absorbs impact is attached. An upper bumper member 7 having a pair of upper and lower pipe members 6 extending in the vehicle width direction is connected to the front ends of the left and right crash boxes 5, and a bumper fascia 8 is provided in front of the upper bumper member 7 in the vehicle. It is arranged.

  Further, lamp support braces 9 extending vertically are respectively attached to the inner surfaces of the pair of left and right crash boxes 5 in the vehicle width direction, and a pair of upper and lower pipe members along the vehicle width direction are attached to the front ends of both lamp support braces 9. A lower bumper member 11 having 10 is connected, and a bumper fascia 12 is disposed in front of the lower bumper member 11 in the vehicle. Here, the bumper fascia 8 and the bumper fascia 12 are integrally formed with a radiator air intake port interposed therebetween.

  Next, the structure of the suspension member will be described below with reference to FIGS.

  The suspension member 4 is a member integrally formed by casting with an aluminum alloy (die casting or the like), and extends substantially vertically downward from a substantially horizontal upper wall 4A and front and rear edges of the upper wall 4A. The front wall 4B and the rear wall 4C have a cross-sectional shape opened downward. Here, as shown in FIGS. 2 and 5, a rectangular through hole 14 through which the torque rod 13 (see FIG. 2) passes is formed in the center of the front wall 4 </ b> B of the suspension member 4 in the vehicle width direction. Near the right side of the wall 4B, a semicircular cutout 16 is formed through which an exhaust pipe 15 extending from an unillustrated engine to the rear of the vehicle passes. A reinforcing rib 17 is integrally formed on the periphery of the notch 16 of the suspension member 4.

  In addition, on the front side of both left and right ends of the upper wall 4A of the suspension member 4 made of aluminum, a support column 4b that constitutes a vehicle body mounting portion is provided upright, and as shown in FIGS. 3 and 4, at the upper end of each support column 4b. A circular hole-shaped bolt insertion hole 18 is provided in the vertical direction. Also, mounting seats 4c (see FIG. 3) constituting the vehicle body mounting portions are formed at the rear end corners of the left and right ends of the upper wall 4A of the suspension member 4, and each mounting seat 4c has a circular hole shape. Bolt insertion holes 19 are respectively provided in the vertical direction.

  Thus, the suspension member 4 has a bolt 20 (see FIG. 2) inserted from below into the bolt insertion holes 18 formed in the left and right support columns 4b, and the first of the pair of left and right apron side members 1 shown in FIG. A pair of left and right apron side members 1 as shown in FIG. 1 are bolts 21 (see FIG. 2) which are tightened to the lower surface of the rear end of the horizontal portion 1A and inserted from below into a bolt insertion hole 19 formed in the mounting seat 4c. It is attached to the left and right apron side members 1 by tightening to the rear end of the slope portion 1C.

  Meanwhile, the stabilizer 22 and the steering gear box 23 shown in FIG. 2 are attached to the upper part of the suspension member 1, but the stabilizer 22 is provided on the left and right sides of the upper wall 4A of the suspension member 4 as shown in FIGS. Mounting seats 4d and 4d for mounting are formed, and mounting seats 4e and 4f for mounting the steering gear box 23 are formed on the left and right of the front of the vehicle. Each mounting seat 4d, 4d is formed with two screw holes 24, and each mounting seat 4e, 4f is formed with two screw holes 25, respectively.

  Thus, as shown in FIG. 2, the stabilizer 22 is configured by screwing the two bolts 27 inserted through the holding member 26 into the screw holes 24 of the mounting seat 4 d formed on the upper wall 4 </ b> A of the suspension member 4. The left and right portions are attached to the upper wall 4A of the suspension member 4 along the vehicle width direction. In the steering gear box 23, two bolts 28 are screwed into the screw holes 25 of the mounting seat 4e of the suspension member 4, and two bolts 29 are mounted on the mounting wall 4f formed on the upper wall 4A of the suspension member 4. The left and right portions are attached to the upper surface of the upper wall 4A of the suspension member 4 along the vehicle width direction.

  As shown in FIGS. 2, 7, and 8, the left and right ends of the suspension member 4 are front and rear of the inner end of a pair of left and right suspension arms 30 (only one is shown in the figure) that are Y-shaped in plan view. Is attached so that it can swing up and down. The outer end portions of the left and right suspension arms 30 are pivotally attached to a front wheel knuckle (not shown) via ball joints 31, and the left and right front wheels (not shown) are respectively attached to the front wheel knuckles. End portions of tie rods 32 that are rotatably supported and extend from the steering gear box 23 to the left and right are connected via a ball joint 33.

  Here, the attachment structure of the suspension arm 30 will be described.

  As shown in FIGS. 6 to 9, two front and rear bosses 4g are integrally formed on each front portion of the left and right end portions of the suspension member 4, and the bottom surface of each boss 4g is a flat downward mounting surface 4g. -1. Each boss 4g has a screw hole 34 extending vertically. As shown in FIG. 9, a recess 35 is formed between the front and rear mounting surfaces 4 g-1 at the front left and right ends of the suspension member 4. Ribs 4h extending in a direction perpendicular to 4g-1 are provided. Here, as shown in FIGS. 4 and 6, the left and right attachment surfaces 4 g-1 of the suspension member 4 are formed in the vicinity of the left and right support columns 4 b that are attachment portions of the suspension member 4 to the vehicle body. .

  Further, as shown in FIGS. 6 to 8, flat rectangular cylindrical mounting portions 4D are formed at the rear portions of the left and right ends of the suspension member 4, respectively. As shown in FIG. A circular bolt insertion hole 36 is formed on the bottom surface of 4D, and a cylindrical boss 4i is erected integrally on the top surface. Each boss 4i has a screw hole 37 extending vertically.

  On the other hand, as shown in FIG. 7, a cylindrical boss 30a that opens in the vehicle front-rear direction is integrally formed on the front side of the inner end of the left and right suspension arms 30 (only one is shown in FIG. 7). A bush 38 is press-fitted in the lateral direction into the boss 30a. Here, as shown in FIG. 9, the bush 38 includes a shaft 38A and an outer cylinder 38B fixed to the suspension member 4, and an elastic member 38C such as rubber filled between the shaft 38A and the outer cylinder 38B. Flat fastening and fixing portions 38a are formed at both ends of the shaft 38A protruding from the outer cylinder 38B. A circular bolt insertion hole 39 is formed in each tightening fixing portion 38a of the shaft 38A.

  A circular fitting hole 30b is formed on the rear side of the vehicle width direction inner end portion of each suspension arm 30, and a bush 40 is press-fitted in the fitting hole 30b in the vertical direction. Although not shown, the bush 40 is configured by filling an elastic member such as rubber between an inner cylinder and an outer cylinder of an inner / outer double cylinder like the bush 38.

  Thus, each suspension arm 30 is attached to the suspension member 4 so as to be swingable up and down in the following manner.

  That is, as shown in FIGS. 8 and 9, a boss 30a formed on the front side in the vehicle width direction inner end portion of each suspension arm 30 and a bush 38 press-fitted into the boss 30a are arranged between the two front and rear mounting surfaces 4g-1. The flat fastening fixing portions 38a formed at both ends of the shaft 38A of the bush 38 are pressed into the front and rear mounting surfaces 4g-1 of the suspension member 4 from below to fit into the formed concave portions 35, and the fastening fixing portions 38a. The bolt 41 inserted from below into the bolt insertion hole 39 formed in the screw is screwed into the screw hole 34 formed in the mounting surface 4g-1 of the suspension member 4, so that the front end in the vehicle width direction of each suspension arm 30 is The side is attached so as to be swingable up and down around the shaft 38A of the bush 38.

  Further, the bush 40 press-fitted into the fitting hole 30b formed on the rear side of the inner end portion in the vehicle width direction of each suspension arm 30 is inserted into the rectangular cylindrical mounting portion 4D formed in the suspension member 4. A bolt 42 inserted from below into a bolt insertion hole 36 formed on the bottom surface of the mounting portion 4D is passed through the inner cylinder of the bush 40, and the tip of the bolt 42 is a screw of a boss 4i erected on the upper surface of the mounting portion 4D. By screwing into the hole 37, the rear side of the vehicle width direction inner end portion of each suspension arm 30 is attached so as to be able to swing up and down by elastic deformation of the elastic member of the bush 40.

  Next, a structure for attaching the torque rod 13 to the suspension member 4 will be described with reference to FIGS.

  The torque rod 13 is a member arranged along the front-rear direction at the center in the vehicle width direction, and suppresses engine swing by connecting the suspension member 4 and an engine (not shown) arranged in front of the suspension member 4. The front end is attached to the engine, and the rear end is attached to the suspension member 4. More specifically, the torque rod 13 is formed by binding a small-diameter cylindrical boss 13B to the front end of a round pipe-shaped rod main body 13A in the direction of opening in the vehicle width direction, and at the rear end of the rod main body 13A than the cylindrical boss 13B. A large-diameter cylindrical boss 13C is connected in the direction of opening in the vertical direction. A bush 43 is press-fitted into the small-diameter cylindrical boss 13B on the front end side, and the large-diameter cylindrical boss 13C on the rear end side is pressed. The bush 44 is press-fitted.

  Although not shown, the bush 43 pressed into the small-diameter cylindrical boss 13B on the front end side of the torque rod 13 is configured by filling an elastic member between the inner cylinder and the outer cylinder arranged concentrically. As shown in FIG. 12, the bush 44 press-fitted into the large-diameter cylindrical boss 13C connects the inner cylinder 44A and the outer cylinder 44B concentrically connected by a V-shaped elastic member 44C in plan view. Configured. The small-diameter bush 43 on the front end side has a small diameter and a high spring constant, and the large-diameter bush 44 on the rear end side has a large diameter and a low spring constant.

  Thus, as shown in FIG. 10, the torque rod 13 is inserted into the through hole 14 formed in the front wall 4 </ b> B of the suspension member 4 with the front end side to which the small-diameter cylindrical boss 13 </ b> B is bound first. The large-diameter cylindrical boss 13 </ b> C passing through the rear end is disposed inside the suspension member 4 (the space portion of the suspension member 4 below the upper wall and behind the front wall). Here, as shown in FIG. 12, a boss 4j is erected integrally with a front portion of the upper wall 4A of the suspension member 4 in the vehicle width direction, and a screw hole 45 penetrating vertically is provided in the boss 4j. Is formed. The boss 4j is formed at a position between the left and right mounting seats 4d and 4d for mounting the stabilizer 22, and is formed slightly rearward between the mounting seats 4e and 4f for mounting the steering gear box 23. That is, the upper wall near the boss 4j is reinforced by the stabilizer 22 and the steering gear box 23. Reinforcing beads extending in the left-right direction of the vehicle are formed before and after the boss 4j.

  As shown in FIGS. 10 and 11, lower end mounting surfaces in which screw holes 46 are formed in the vertical direction are formed on the left and right sides of the through hole 14 at the lower end portion of the front wall 4 </ b> B of the suspension member 4. The lower end mounting surface is substantially the same height as the lower end of the inner cylinder 44 </ b> A of the large-diameter bush 44. The through hole 14 is formed in such a size that the small-diameter cylindrical boss 13B into which the small-diameter bush 43 is press-fitted can pass but the large-diameter cylindrical boss 13C into which the large-diameter bush 44 is press-fitted cannot pass. Thus, the decrease in the strength of the front wall 4B is minimized. Further, bosses with screw holes 46 formed on the left and right sides of the through hole 14 are arranged in the vertical direction to reinforce the periphery of the through hole 14, and the strength of the front wall 4 </ b> B due to the formation of the through hole 14. As much as possible, the decline is reduced.

  By the way, the front end portion of the torque rod 13 is attached to the lower portion of the engine by a bolt (not shown) that is inserted in the inner cylinder of the bush 43 press-fitted into the cylindrical boss 13B at the front end. Further, a connecting plate 47 shown in FIGS. 11 and 12 is used to attach the rear end portion of the torque rod 13 to the suspension member 4.

  The connecting plate 47 is formed in a substantially triangular shape in plan view with the front end side (the front wall 4B side of the suspension member 4) being wide, and has two width direction end portions on the front end side and the rear end (the apex portion of the triangle). A circular bolt insertion hole 48 is vertically penetrated in a total of three places, and a mounting surface is formed. Here, a flange 47a bent downward is formed on the periphery of the connection plate 47, and the rigidity of the connection plate 47 is enhanced by the flange 47a. Further, the central portion of the connecting plate 47 is formed with a concave portion 47b that is one step lower than the mounting surface, thereby forming a vertical wall around the concave portion 47b to increase the rigidity of the connecting plate 47. A triangular hole 47c is formed in the bottom surface of 47b. By forming the triangular hole 47c in the central portion of the connecting plate 47 in this way, the connecting plate 47 can be reduced in weight, and mud and foreign matters can be prevented from accumulating on the connecting plate 47 and staying in water. . That is, the connecting plate 47 is a triangular frame-shaped reinforcing member that connects the three bolt insertion holes 48 with the flange 47a, the mounting surface, the vertical wall around the recess 47b, and the triangular hole 47c.

  Thus, as shown in FIG. 12, the cylindrical boss 13C bonded to the rear end portion of the torque rod 13 is formed by a screw in which the inner cylinder 44A of the bush 44 is formed on the boss 4j of the upper wall 4A of the suspension member 4. Positioned to coincide with hole 45. Then, the mounting surface of the connecting plate 47 is overlapped with the lower end mounting surface of the front wall 4B of the suspension member 4 from below, and bolt insertion holes formed at two left and right positions on the front end side of the connecting plate 47 as shown in FIG. Bolts 49 are passed through 48 from below, and these bolts 49 are screwed into screw holes 46 formed in the vertical direction at two locations on the left and right sides of the lower end mounting surface of the front wall 4B of the suspension member 4, respectively. The side portion is fastened and fixed to the lower end mounting surface of the front wall 4B of the suspension member 4.

  When the front end side portion of the connecting plate 47 is attached to the lower end mounting surface of the front wall 4B of the suspension member 4 as described above, the connecting plate 47 is formed at one place at the rear end of the connecting plate 47 as shown in FIG. The bolt insertion hole 48 coincides with the inner cylinder 44A of the bush 44, and the bolt 50 is passed through the bolt insertion hole 48 of the connecting plate 47 and the inner cylinder 44A of the bush 44 from below, and the upper thread portion of the bolt 50 is connected to the suspension member 4. By screwing into the screw hole 45 of the boss 4j erected on the upper wall 4A, the rear end portion of the torque rod 13 is fastened and fixed to the lower surface of the suspension member 4 via the bush 44. When the rear end portion of the torque rod 13 is attached to the suspension member 4 by fastening together with the connecting plate 47 with the bolt 50 in this way, the upper and lower ends of the bolt 50 are both supported by the upper wall 4A of the suspension member 4 and the connecting plate 47. Supported by That is, since the lower end (head) of the bolt 50 and the front wall 4B of the suspension member 4 are connected by the connecting plate 47, the bolt 50 is attached to the suspension member 4 in a both-sided state, and the fall of the bolt 50 is suppressed. To be supported reliably.

  As described above, in the present embodiment, even if the suspension member 4 is made of aluminum and is opened downward, one end of the torque rod 13 is passed through the through hole 14 formed in the front wall 4B of the suspension member 4. The bolt 50 is disposed in the suspension member 4, and one end of the torque rod 13 is fixed to the upper wall 4 </ b> A of the suspension member 4 by fastening a bolt 50 inserted from below into a bush 44 provided on the torque rod 13. Since the lower end portion and the lower end portion of the front wall 4B of the suspension member 4 are connected by the connecting plate 47, the bolt 50 is securely supported in a both-sided state to prevent its falling, and the suspension member of the torque rod 13 is prevented. 4 is increased in rigidity, and the swing of the engine is effectively suppressed by the torque rod 13. That.

  Further, since the torque rod 13 and the connecting plate 47 are attached by tightening from below, their attachment workability is improved. Further, since the torque rod 13 and the connecting plate 47 are attached to the suspension member 4 that is opened downward, there is no need to remove the part from the bag-like attachment part like a sheet metal suspension member having a hollow cross-sectional structure. Desorption workability is improved.

  Furthermore, in the present embodiment, the connecting plate 47 is formed in a substantially triangular shape in plan view with the front end side (the front wall 4B side of the suspension member 4) being wide, and a plurality of locations on the front wall side of the suspension member 4 are formed. Since it is fixed to the lower end of the front wall 4B, the force acting on the torque rod 13 from the engine side can be reliably received by the connecting plate 47 and transmitted to the suspension member 4.

  In the present embodiment, the connecting plate 47 is fastened and fixed to the left and right sides of the through hole 14 formed in the front wall 4B of the suspension member 4 so as to connect the left and right of the through hole 14. 14, the front wall 4B portion of the suspension member 4 whose rigidity is lowered is reinforced by the connecting plate 47, and the torque rod 13 having one end attached to the suspension member 4 having high rigidity effectively suppresses the swing of the engine. The

  In this embodiment, the front end of the connecting plate 47 is connected to the front wall 4B of the suspension member 4 from below, which is perpendicular to the vehicle longitudinal direction, which is the direction of transmission of force from the engine to the torque rod 13. Since the bolts 49, which are fasteners, are tightened and fixed on the lower end mounting surface, the loosening of the bolts 49, which are fasteners, is prevented, and the connecting plate 47 is securely tightened. In particular, the aluminum suspension member 4 cannot withstand a large tightening torque, but the coupling plate 47 can be securely tightened and fixed to the suspension member 4 with a high reliability even with a relatively small tightening torque. The force transmitted through the rod 13 can be efficiently received by the connecting plate 47.

  In addition, in the present embodiment, the connecting plate 47 is disposed on the side of the substantially semicircular cutout 16 formed in the front wall 4B of the suspension member 4, and the bush 44 having the elastic member 44C is removed from the exhaust pipe 15. Therefore, the bushing 44 is prevented from being deteriorated by heat, and its durability is enhanced.

  Next, another embodiment of the present invention will be described below with reference to FIGS.

  FIG. 13 is a perspective view of a connecting plate according to another embodiment, and FIG. 14 is a partial side sectional view showing the relationship between the front end edge portion of the connecting plate shown in FIG. 13 and the lower end portion of the front wall of the suspension member. Then, as shown in the figure, it extends forward from the lower end of the flange 47a formed at the front end edge of the connecting plate 47, passes below the lower end portion of the front wall 4B of the suspension member 4 and then bends upward. A portion 47 d is formed, and the bent portion 47 d is disposed in front of the lower end of the suspension member 4. That is, the lower end of the suspension member 4 is covered with the connection plate. For this reason, not only the lower surface of the lower end of the front wall 4B of the suspension member 4 made of an aluminum alloy that is softer and more easily damaged than iron material, but also the front surface can be protected from flying stones and the like by the bent portion 47d of the connecting plate 47. Durability is improved.

DESCRIPTION OF SYMBOLS 1 Apron side member 4 Aluminum suspension member 4A Upper wall of suspension member 4B Front wall of suspension member 4C Rear wall of suspension member 13 Torque rod 14 Through hole 43, 44 Bush 45, 46 Screw hole of suspension member 47 Connection plate 47d Connection Plate bent part 48 Connection plate bolt insertion hole 49,50 Bolt

Claims (5)

An aluminum suspension member integrally formed of an aluminum alloy and having a substantially horizontal upper wall, and a cross-sectional shape having a lower portion opened by a front wall and a rear wall extending downward from front and rear edges of the upper wall;
An engine disposed in front of the aluminum suspension member;
A torque rod connecting the engine and the suspension member;
A torque rod mounting structure for connecting an engine side end portion and a suspension member side end portion of the torque rod of the vehicle having an elastic force to the engine and the suspension member via a bush having elasticity,
The end of the torque rod on the suspension member side is disposed in the suspension member through a through hole formed in the front wall of the suspension member, and the end of the suspension member on the lower side of the bush provided on the suspension member. The bolt inserted through from the upper wall of the suspension member is fastened and fixed, and the lower end of the bolt and the lower end of the front wall of the suspension member are connected by a connecting plate ,
The connection plate is formed in a substantially triangular shape in plan view in which the front wall side of the suspension member is wide, and a plurality of locations on the front wall side are fixed to a lower end portion of the front wall of the suspension member;
The torque rod is arranged so as to intersect the side extending in the vehicle width direction on the front wall side among the sides constituting the triangle in plan view,
A torque rod mounting structure for a vehicle , wherein the front wall side end portions of the connection plate are fastened and fixed to the left and right side positions of the through hole formed in the front wall of the suspension member . An aluminum suspension member integrally formed of an aluminum alloy and having a substantially horizontal upper wall, and a cross-sectional shape having a lower portion opened by a front wall and a rear wall extending downward from front and rear edges of the upper wall;
An engine disposed in front of the aluminum suspension member;
A torque rod connecting the engine and the suspension member;
A torque rod mounting structure for connecting an engine side end portion and a suspension member side end portion of the torque rod of the vehicle having an elastic force to the engine and the suspension member via a bush having elasticity,
The end of the torque rod on the suspension member side is disposed in the suspension member through a through hole formed in the front wall of the suspension member, and the end of the suspension member on the lower side of the bush provided on the suspension member. The bolt inserted through from the upper wall of the suspension member is fastened and fixed, and the lower end of the bolt and the lower end of the front wall of the suspension member are connected by a connecting plate,
A torque rod mounting structure for a vehicle, wherein a front end edge of the connecting plate is bent upward, and the bent portion is disposed in front of the suspension member . The connection plate is formed in a substantially triangular shape in a plan view in which the front wall side of the suspension member is wide, and a plurality of positions on the front wall side are fixed to a lower end portion of the front wall of the suspension member. 3. A torque rod mounting structure for a vehicle according to 2. 4. The torque rod mounting structure for a vehicle according to claim 3, wherein the front wall side end portions of the connecting plate are fastened and fixed to the left and right side positions of the through hole formed in the front wall of the suspension member . The vehicle torque according to any one of claims 1 to 4 , wherein a front wall side end portion of the connection plate is overlapped with a lower end mounting surface of a front wall of the suspension member from below and tightened and fixed from below. Rod mounting structure.

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