JP3111760B2 - Reinforcement structure for vehicle body members of vehicles equipped with axle beam suspension - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body member reinforcing structure for a vehicle equipped with an axle beam suspension.

[0002]

2. Description of the Related Art A stable vehicle with little change in behavior when traveling straight or turning on an uneven road or the like, while suppressing a change in scuffing on the road surface with or without a body roll and eliminating the occurrence of a jack-up force due to a lateral force action. An arrangement structure of an axle beam suspension capable of realizing traveling has already been proposed (Japanese Patent Application No. 4-243).
No. 589). That is, a body member that is provided between a pair of rear side members disposed on the left and right along the vehicle body front-rear direction and that has a convex shape facing the vehicle body downward, one end is attached to the body member, and the other end is left and right. A panal rod attached to an axle beam connecting the rear wheels, one end attached to an intermediate position of the panal rod, the other end attached to the axle beam, an assist link attached to the axle beam, and the other end of the panal rod An absorbing member interposed between the axle beam and an axially displaceable member of the Panal rod.

[0003]

However, in such a conventional technique, since the body member has a hollow structure and low rigidity, it is easily deformed in the front-rear direction due to an external force. Further, the low rigidity of the vehicle body member means that the resonance frequency is low, and noise may be generated during traveling.
Further, the mounting strength of the Panal rod connected to the vehicle body member is reduced, which is disadvantageous in terms of steering stability.

The present invention has been made by paying attention to such a conventional technique, and provides a vehicle body member reinforcing structure of an axle beam type suspension-equipped vehicle capable of increasing the rigidity of a vehicle body member.

[0005]

According to the present invention, there is provided a vehicle body member reinforcing structure for an axle beam type suspension-equipped vehicle.
In order to achieve the above object, a reinforce having a width corresponding to the front-rear width of the inside of the vehicle body member and having overlapping portions joined at both ends in a superposed state to the vehicle body member is provided in the vehicle body member.

[0006]

According to the present invention, since the reinforce having a width corresponding to the front-rear width of the inside of the vehicle body member is provided in the vehicle body member, the cross-sectional deformation in the front-rear direction becomes difficult even when the vehicle body member receives an external force. Therefore, the vehicle body member is not deformed in the front-rear direction and does not interfere with surrounding vehicle body accessories.

Further, since the overlapping portions at both ends of the reinforce are joined to the vehicle body member in a superposed state, the front and rear of the vehicle body member are connected by the reinforcement, thereby increasing the overall rigidity of the vehicle body member. Therefore, generation of noise is suppressed, and the mounting strength of the Panal rod is improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 to 6 are views showing a first embodiment of the present invention. First, a vehicle body structure according to the present invention will be described. Reference numeral 1 denotes a rear side member, which is joined to the lower surface on each of the left and right sides of the floor panel 2 in a state along each of the front and rear directions. At the middle position of the rear side member 1, bent portions 3 facing each other are formed. Also,
The rear end of the rear side member 1 is provided with a tie-down 5 for hooking a hook (not shown) for fixing the vehicle body during transportation of the vehicle.

At the rear side of the bent portion 3 of the rear side member 1, an axle beam 18 having rear wheels 17 at both ends is disposed along the left and right direction of the vehicle body. Both ends of the axle beam 18 are connected to the rear side member 1 via a trailing arm 19, and the trailing arm 19 receives a front-rear force input from the rear wheel 17.

The lower end 9b of the strut 9 is connected to front projections 18a at both ends of the axle beam 18. The upper end 9a of the strut 9 is fixed to the upper part of the strut housing 8 as described above.
In other words, the upper end 9a of the strut 9 is located slightly inside the lower end 9b due to the demand for suspension performance, and both struts 9 are shaped like "C" when viewed from the rear. Therefore, the strut 9 receives an input from the rear wheel 17 in the vertical direction.

Left and right bent portions 3 of the rear side member 1
The two members are connected by a cross member 12 having an inverted hat shape in cross section. A panal rod bracket 13 having a substantially inverted triangular portion 4 is attached to the cross member 12, and a body member 14 is configured by the panal rod bracket 13 and the cross member 12.

The Panal rod bracket 12 is formed by combining a front member 10 and a rear member 11 having a substantially symmetrical shape in front and rear, and attached to the cross member 12. 20a
Are formed respectively. The lower end 15 of this Panal rod bracket 13
Is located slightly to the left of the left and right central portions of the vehicle body with respect to the entire vehicle body, but is located substantially at the center of the spare tire pan 16 recessed in the floor panel 2.

From the left and right ends of the front member 10 and the rear member 11 constituting the Panard rod bracket 13,
Horizontal portions 39 and 40 joined to the lower surface of cross member 12
Are formed in directions facing each other. Front member 10
The right and left end portions of the substantially inverted triangular portion 4 of the rear member 11 are formed with bent side portions 41 and 42, respectively, except for the vicinity of the lower end portion 15. The portions other than the side surface portions 41 and 42 are portions that become openings 43 for attaching the panal rod 20 when the front member 10 and the rear member 11 are attached to the cross member 12 together. Panhard rod 2
Since 0 extends rightward from the lower end portion 15, this opening 43 is also wide open on the right side. The left and right side surfaces 4
The semi-circular cutouts 44, which together form a circular mounting hole, are formed at the end of the left side surface portion 42 of the first and second side portions 42.

Reference numeral 45 denotes a reinforcement. The reinforcement 45 includes a front member 10 and a rear member 11.
Widths W corresponding to the front and rear widths between the right and left sides, and upward and downward overlapping portions 46 and 47 which are joined to the left and right side portions 41 and 42 of the substantially inverted triangular portion 4 in an overlapping state are formed at the left and right ends. Have been. The reinforcement 45 has an overlapping portion 4 in order to increase the overall rigidity of the reinforcement 45.
Upward flanges 45 at front and rear ends including 6, 47
f is formed. A mounting hole 48 with a welding nut 48a is provided at a position corresponding to the semicircular cutout 44 of the left overlapping portion 47 in the reinforcement 45. This reinforcement 45 is formed by overlapping portions 4 at both ends.
6 and 47 are welded to the left and right side portions 41 and 42 of the Panhard rod bracket 13 respectively, so that the left and right side portions 41 and 42 are located at the upper and lower intermediate positions of the substantially inverted triangular portion 4.
Will be connected to each other.

Reference numeral 20 denotes a Panard rod, which has a large vertical portion only at an intermediate portion and a double structure portion 21 which is divided into front and rear portions. The double structure portion 21 is formed with a substantially vertical elliptical opening 22 that penetrates back and forth. This Panhard rod 2
0 of the Panal rod bracket 13
Is attached to the lower end 15 of the base through a bush 23.

The right end 20b of the Panard rod 38
Is mounted on a support pin 25 of a bracket 24 provided on the right side of the axle beam 18 via an anisotropic bush 26 as an “absorbing member”.

On the other hand, of the upper surface of the axle beam 18,
Another bracket 27 is provided at a position corresponding to the opening 22 of the Panal rod 20, and a left end 28 a of the assist link 28 is attached thereto via a bush 29. The right end 28b of the assist link 28 is attached via a bush 30 at a position on the right side of the double structure portion 21 of the Panal rod 20.

Next, other structures will be described. 3
An exhaust pipe 1 extends rearward along the right rear side member 1. A parking brake cable 32 is disposed outside the trailing arm 19. On the right, the parking brake cable 32
And the exhaust pipe 31 approach each other, but since the trailing arm 19 is interposed therebetween, the trailing arm 19 serves as a heat shield plate, and protects the parking brake cable 32 from the heat of the exhaust pipe 31. ing.

Reference numeral 33 denotes a filler tube.
Is connected via a hose 36 to a connection port 35 at the rear end on the left side. The filler tube 33 is used for the vehicle body member 1.
After passing under 4, it bends outward and extends. The filler tube 33 is fixed from below with a bracket 37 in the vicinity of the connection to the hose 36. That is, the right end of the bracket 37 is a “mounting hole” in which the semicircular cutout portion 44 at the joint portion between the left side surface portion 42 of the Panal rod bracket 13 and the corresponding overlapping portion 47 of the reinforce 45 is combined. , Welding nut 48a
It is fixed to a mounting hole 48 with a bolt 38.
The left end of the bracket 37 is also fixed to the joint between the rear side member 1 and the vehicle body member 14 with a bolt 38.

Next, the advantages of this embodiment will be described. Prevent deformation of vehicle body members (see FIGS. 4 and 5).
The reinforcement 45 having a width W corresponding to the front-rear width of the panal rod bracket 13 is provided at an upper and lower middle position of the panal rod bracket 13.
In addition, even if a forward external force F is applied, the cross section of the Panal rod bracket 13 is not easily deformed due to the presence of the reinforce 45. Therefore, the amount of deformation of the Panal rod bracket 13 to the front side is small, and there is no possibility of interference with the fuel tank 34 and the like arranged on the front side.

Noise suppression (see FIG. 6) Reinforce 4 into the Panal rod bracket 13
By adding 5, the rigidity of the entire vehicle body member 14 is improved and the resonance frequency is increased, so that it is possible to suppress the generation of noise during traveling. FIG. 6 shows noise generation data when the rain force 45 is actually provided and when it is not provided. In the drawing, the solid line is the data of the present embodiment in which the reinforcement 45 is provided, the dotted line is the data of the comparative example in which the reinforcement 45 is not provided, and the hatched portion indicates the noise reduction amount. The results are shown in FIG.
Significant noise reduction was observed in the range of ~ 300 dB.

The rigidity of the entire vehicle body member 14 is improved by the addition of the reinforcement 45 for the Panal rod mounting rigidity.
Since the attachment of the Panal rod 20 attached to the fifth member 5 is increased, the steering stability is improved as a result.

For mounting rigidity of bracket for filler tube
Since the right end of the bracket 37 for fixing the upper filler tube 33 was attached to the joint between the left side surface 42 of the Panhard rod bracket 13 and the corresponding overlapping portion 47, the mounting rigidity of the bracket 37 at this portion was established. And the attachment of the filler tube 33 is ensured.

Improvement of Suspension Performance In the suspension of this embodiment, the Panal rod 20
The assist link 28 is provided in the double structure portion 21 in the middle of the above, so that the vehicle body member 14 is supported at one point and the axle beam 18 is supported at two points, and the right end 20b of the Panal rod 20 is laterally displaced. Since the anisotropic bush 20 that absorbs the vibration is interposed, the displacement itself in the left-right direction of the vehicle body member 14 due to the road surface input can be suppressed. Further, the fact that the structure itself of the Panhard rod 20 is supported at one point on the vehicle body member 14 side and is supported at two points on the axle beam 18 side as described above means that the axle beam on the side supported at two points is provided. By maintaining the positional relationship of the axle beam 18 (that is, the road surface) as a reference, it is possible to suppress the scuff change with respect to the road surface to be small irrespective of the vehicle body posture. Therefore, the amount of scuffing when the wheels bounce and rebound with respect to the road surface is suppressed to a small value regardless of the presence or absence of the body roll, and when the rear wheels 17 bounce and rebound even in the body roll state, the rear wheels 17 Even if a lateral force is applied to the contact point, there is no change in the link arrangement regardless of the body roll.
No jack-up force is generated to lift the vehicle body member 14 from above.

Further, since the body member 14 to which the Panal rod 20 is attached has an inverted triangular shape and the width of the base portion with respect to the cross member 12 is sufficiently large, the Panal rod 2
The input added from 0 can be effectively transmitted to the rear side member 1. In addition, the lower end 9b of the strut 9
Is mounted at a position outside the trailing arm 19 of the axle beam 18, the distance between the left and right lower ends 9b can be widened, and stable vehicle running with little change in behavior when the vehicle body rolls can be realized.

FIGS. 7 and 8 show a second embodiment of the present invention. The reinforcement 45 'according to this embodiment has a shorter left and right length than the reinforcement 45 according to the first embodiment.
It is joined to the front and rear surfaces of. The width W of the reinforcement 45 'is the same as that of the first embodiment, and a flange 45f' is formed at a side end. Like the reinforcement 45 of the first embodiment, the reinforcement 45 'of this embodiment also exhibits a function of preventing deformation of the vehicle body member 14, a function of suppressing noise, a function of increasing the mounting rigidity of the Panal rod 20, and the like. Can be. However, with the reinforcement 45 'of the second embodiment, the mounting rigidity of the bracket 37 for the filler tube 33 cannot be increased. In addition, the lower surfaces 14a and 14b corresponding to the exhaust pipe 31 and the filler tube 33 of the vehicle body member 14 of the second embodiment are curved upward, respectively. The structure is such that interference with the motor 33 can be avoided more reliably.

In the above description, the vehicle body member 14 is constituted by combining the two members of the cross member 12 and the Panal rod bracket 13. However, the cross member 12 and the Panal rod bracket 13 may be integrally formed in advance. Further, as long as it is provided between the rear side members 1, the cross member 12 may not be provided and only the Panal rod bracket 13 may be used.

[0028]

According to the vehicle body member reinforcing structure for an axle beam type suspension-equipped vehicle according to the present invention, since a reinforcement having a width corresponding to the front-rear width of the inside of the vehicle body member is provided in the vehicle body member, the vehicle body member is subjected to an external force. Even if it receives, it becomes difficult to deform the cross section in the front-back direction. Therefore, the vehicle body member is not deformed in the front-rear direction and does not interfere with surrounding vehicle body accessories.

Further, since the overlapping portions at both ends of the reinforcement are joined to the vehicle body member in a superposed state, the left and right ends are connected by the reinforcement, and the overall rigidity of the vehicle body member is increased. Therefore, generation of noise is suppressed, and the mounting strength of the Panal rod is improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a vehicle body reinforcement structure of an axle beam type suspension-equipped vehicle according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view showing a state viewed from a direction indicated by an arrow DA in FIG.

FIG. 3 is an exploded perspective view of a vehicle body member.

FIG. 4 is a cross-sectional view taken along the line SA-SA shown in FIG. 1 and shows a state before receiving an external force.

FIG. 5 is a diagram showing a state after receiving an external force.

FIG. 6 is a graph comparing noise generation states depending on the presence or absence of a reinforcement.

FIG. 7 is a side view corresponding to FIG. 2 showing a second embodiment of the present invention.

FIG. 8 is an exploded perspective view corresponding to FIG. 3 showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rear side member 14 Body member 18 Axle beam 20 Panal rod 28 Assist link 26 Anisotropic bush 37 Filler tube bracket 41, 42 Left and right side surfaces 45, 45 'Reinforce 46, 46', 47, 47 'Rain Force overlap W Reinforce width

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60G 7/00 B60G 9/04

Claims (2)

(57) [Claims] 1. A vehicle body member which is provided between a pair of rear side members disposed on the left and right sides along a vehicle body front-rear direction and has a convex shape toward the vehicle body downward, and one end is attached to a lower end portion of the vehicle body member. A Panal rod having the other end attached to an axle beam connecting the left and right rear wheels; an assist link having one end attached to a middle position of the panal rod, and the other end attached to the axle beam; An axle beam type suspension-equipped vehicle comprising: an absorbing member interposed between the other end of a rod and the axle beam, the absorbing member being capable of being displaced in an axial direction of the Panal rod, An axle having a width corresponding to the front-rear width of the inside of the member and a reinforce having an overlapped portion joined to the body member in an overlapped state at both ends. Body member reinforcing structure over arm type suspension equipped vehicle. 2. The vehicle body member reinforcing structure for an axle beam type suspension-equipped vehicle according to claim 1, wherein a filler tube bracket is bolted to a joint between the overlapping portion of the reinforcement and the corresponding side surface of the vehicle body member.