JP2004130936A - Suspension device of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve strength of a suspension member in a suspension device of an automobile with a simple constitution. <P>SOLUTION: The suspension device 4 is equipped with a suspension member 20, a brace 22 and a jack receiving part 36. In the suspension member 20 extends to the width direction of the vehicle body 2, with a middle part 17 in the longitudinal direction convexly curved and with respective end parts 18 in the longitudinal direction connected to a vehicle body frame 13. The brace 22 is extended to the width direction of the vehicle body 2 under the suspension member 20, mounted to both ends parts 18, 18 of the suspension member 20, and connected to these. The jack receiving part 36 is projectedly provided downward from the middle part 17 of the suspension member 20, and a projection end part 33 can be vertically opposed to an elevating part 35 of a jack 34 placed on a traveling surface 8. The jack receiving part 36 is jointed with the middle part 37 in the longitudinal direction of the brace 22. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a suspension system for a vehicle, which is provided with a jack receiving portion for supporting an external force from the jack when the vehicle is lifted by a jack, and the suspension member is reinforced by the jack receiving portion.
[0002]
[Prior art]
[0003]
[Patent Document 1] Japanese Patent Application Laid-Open No. 11-268662
Conventionally, there is a suspension apparatus for an automobile described in Patent Document 1 described above.
[0005]
According to the above-mentioned Patent Document 1, the vehicle suspension system extends in the width direction of the vehicle body, and is curved so that a middle portion in the longitudinal direction becomes a convex shape upward, and each end in the longitudinal direction is formed on the vehicle body frame. A suspension member to be connected, a brace extending in the width direction of the vehicle body below the suspension member, being mounted on both ends of the suspension member, and being connected to these ends; And a support that protrudes and supports the traveling drive unit and is coupled to the brace.
[0006]
The suspension member is reinforced by a brace and a support, thereby improving the strength of the suspension member that suspends each wheel. The space between the suspension member and each halfway of the brace is used for piping of an exhaust pipe.
[0007]
In general, the drive unit generates vibrations when driven. Therefore, in order to prevent the vibration from being transmitted to the suspension member, the support usually includes a buffer capable of absorbing the vibration.
[0008]
[Problems to be solved by the invention]
By the way, in the above-mentioned prior art, the brace is located below the suspension member and may come into contact with the running surface when the vehicle is traveling on a rough road. In this case, a large impact force is generated when the brace comes into contact. May be transmitted to the support connected to the brace and may damage the buffer of the support.
[0009]
Therefore, it is conceivable to release the connection of the support to the brace to separate them from each other, and to provide a separate reinforcing member for connecting the suspension member and the brace to each other. With this configuration, since the impact force from the brace is not transmitted to the buffer of the support, the disadvantage of damage to the buffer is prevented, and the suspension member is provided with a predetermined strength by the reinforcing member. Strength is ensured.
[0010]
However, if the reinforcing member for reinforcing the suspension member is separately provided as described above, the number of components of the suspension device increases, and there is a problem that the configuration is complicated.
[0011]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to improve the strength of a suspension member in a vehicle suspension system with a simple configuration.
[0012]
Another object of the present invention is to allow a vehicle to be lifted by a jack in a stable state.
[0013]
[Means for Solving the Problems]
A vehicle suspension system according to the present invention for solving the above problems is as follows. Note that the reference numerals added to the terms in this section do not limit the technical scope of the present invention to the contents of the “Embodiments of the Invention” described below.
[0014]
The invention according to claim 1 is a suspension member which extends in the width direction of the vehicle body 2 and has a longitudinal middle portion 17 curved so as to have an upwardly convex shape, and the longitudinal ends 18 are connected to the vehicle body frame 13. A suspension system for a motor vehicle comprising a suspension member 20 and a brace 22 extending in the width direction of the vehicle body 2 below the suspension member 20, extending over both end portions 18 of the suspension member 20, and connected to the respective end portions 18. At
[0015]
A jack receiving portion 36 protruding downward from the middle portion 17 of the suspension member 20 and having a protruding end portion 33 capable of vertically opposing the lifting portion 35 of the jack 34 mounted on the running surface 8. The jack receiving portion 36 is connected to a longitudinally intermediate portion 37 of the brace 22.
[0016]
According to a second aspect of the present invention, in addition to the first aspect, the suspension member 20 and the brace 22 are overlapped with each other in the vertical direction over substantially the entire length of the brace 22 in the longitudinal direction.
[0017]
According to a third aspect of the present invention, in addition to the first or second aspect of the invention, the suspension member 20 further includes a support member 7 protruding downward from the middle portion 17 of the suspension member 20 and supporting the traveling drive unit 5 and the like. In cars,
[0018]
The upper surface of the intermediate portion 37 of the brace 22 and the lower surface of the support 7 face each other, and a gap is formed between the upper surface of the intermediate portion 37 of the brace 22 and the lower surface of the support 7 in the free state of the brace 22. When the vehicle 1 is lifted by raising the elevating portion 35 of the jack 34 from below each of the intermediate portions 37 of the support 7 and the brace 22, the intermediate portion 37 of the brace 22 is Is pushed up.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0020]
2 to 4, reference numeral 1 denotes an automobile, and an arrow Fr indicates the front of the automobile 1.
[0021]
The automobile 1 has a vehicle body 2, a suspension device 4 for suspending left and right front wheels 3, 3 at a front portion of the vehicle body 2, and a traveling drive unit 5 supported across the vehicle body 2 and the suspension device 4. The vehicle body 2 includes front and rear supports 6 and 7, and a front portion of the vehicle body 2 is supported on a running surface 8 by the wheels 3 and a suspension device 4. The drive unit 5 includes an internal combustion engine 9 and a power transmission device 10, and the wheels 3 are connected to the power transmission device 10 of the drive unit 5 by a universal joint shaft (not shown). Reference numeral 11 indicates a central portion of the vehicle body 2 in the width direction.
[0022]
The vehicle body 2 includes a vehicle body frame 13 forming a skeleton thereof, and a vehicle body body 14 supported on the vehicle body frame 13 and having a vehicle interior. The vehicle body frame 13 includes left and right sides of the vehicle body frame 13. A pair of left and right side members 15, 15 that form side portions and extend in the front-rear direction, and a cross member (not shown) that connects the left and right side members 15, 15 to each other are provided. The front of the drive unit 5 is supported by the body 6.
[0023]
In all the drawings, the suspension device 4 extends in the width direction of the vehicle body 2, and its middle portion 17 in the longitudinal direction is curved so as to have an upwardly convex shape, and each end portion 18 in the longitudinal direction is each of the vehicle body frame 13. A suspension member 20 coupled to the side member 15 by a fastener 19, and extends substantially linearly below the suspension member 20 in the width direction of the vehicle body 2 and is mounted on both ends 18, 18 of the suspension member 20 and A brace 22 is connected to the end portion 18 by a fastener 21 and reinforces the suspension member 20. A rear portion of the drive unit 5 is supported by the rear support member 7 at an intermediate portion 17 of the suspension member 20.
[0024]
The brace 22 is made of sheet metal and includes a pair of plate members 23, 23 which are overlapped in the vertical direction and are connected to each other by spot welding. The brace 22 has a closed cross-section in each of its longitudinal sections to ensure sufficient strength and rigidity. The wheels 3 are suspended from left and right sides of the suspension member 20 via link mechanisms (not shown).
[0025]
Each of the supports 6 and 7 has a cylindrical buffer body 25 having an axis 24 extending in the horizontal direction and called an insulator. The buffer body 25 penetrates the buffer body 25 on the axis 24 and is mutually connected to the buffer body 25. A support shaft 26 to be fixed, and a bracket which is fitted to the shock absorber 25 and is fixed to the shock absorber 25 and is supported on one of the vehicle body 2 including the suspension device 4 and the drive unit 5. 27, and another bracket 28 for supporting the support shaft 26 on the other side. In other words, the drive unit 5 is supported on the vehicle body 2 side via the buffer 25, and is provided between the vehicle body 2 side and the drive unit 5. Vibration to be transmitted by the damper 25 is absorbed by the elastic deformation of the buffer 25.
[0026]
In the above case, in each of the front supports 6, the axis 24 extends in the front-rear direction, and in the rear support 7, the axis 24 extends in the width direction of the vehicle body 2. Further, the buffer 25, the support shaft 26, and the bracket 27 of the rear support member 7 project downward from the middle portion 17 of the suspension member 20.
[0027]
The suspension device 4 protrudes downward from the middle portion 17 of the suspension member 20, and a protruding end portion 33 of the suspension device 4 is capable of vertically facing a lifting / lowering portion 35 of a jack 34 mounted on the running surface 8. The protruding end portion 33 of the jack receiving portion 36 is joined to the upper surface of the intermediate portion 37 in the longitudinal direction of the brace 22, and is connected to the intermediate portion 37 by a fastener 38. In this case, the rear support 7 and the jack receiving portion 36 are arranged side by side in the width direction with the center portion 11 in the width direction of the vehicle body 2 interposed therebetween.
[0028]
At the center portion 11 in the width direction of the vehicle body 2, an engagement piece 41 protrudes downward from the lower plate member 23 of the brace 22, and the engagement piece 41 is disposed below the support 7. The lifting portion 35 of the jack 34 can be engaged with the engagement piece 41 (two-dot chain line in FIGS. 1, 3, and 7).
[0029]
According to the above-described configuration, the suspension device 4 is formed so as to protrude downward from the middle portion 17 of the suspension member 20, and the protruding end portion 33 of the suspension device 4 is in contact with the elevating portion 35 of the jack 34 placed on the running surface 8. The protruding end portion 33 of the jack receiving portion 36 is joined to the upper surface of the intermediate portion 37 in the longitudinal direction of the brace 22, and is connected to the intermediate portion 37.
[0030]
Therefore, the suspension member 20 and the intermediate portions 17 and 37 of the brace 22 are connected to each other by the jack receiving portion 36, so that the suspension member 20 is more reliably connected to the suspension member 20 by the brace 22 via the jack receiving portion 36. It will be reinforced and its strength will be improved.
[0031]
Since the reinforcement of the suspension member 20 is achieved by using the jack receiving portion 36, the strength of the suspension member 20 can be improved by a simple configuration by the use.
[0032]
In particular, as shown in FIGS. 4 and 5, the suspension member 20, the brace 22, and the jack receiving portion 36 are vertically overlapped with each other in the longitudinal direction of the brace 22 and in the front-rear direction of the vehicle body 2, respectively, substantially entirely. ing.
[0033]
For this reason, the suspension member 20, the brace 22, and the jack receiving portion 36 for connecting the suspension member 20 and the intermediate portions 17, 37 of the brace 22 to each other are arranged on a virtual vertical plane extending in the width direction of the vehicle body 2. As a result, the strength of the suspension member 20 against external force directed in the vertical direction is more reliably improved, that is, the strength of the suspension member 20 against external force from the wheel 3 suspended on the suspension member 20 during traveling is more reliably improved. I do.
[0034]
In particular, as shown in FIGS. 1, 3 to 5, and 8, the upper surface of the middle portion 37 of the brace 22 and the lower surface of the rear support 6 are opposed to each other. A gap 43 is provided between the upper surface of the intermediate portion 37 and the lower surface of the rear support 6 (solid line in each drawing).
[0035]
When the vehicle 1 is raised by engaging the lifting portion 35 of the jack 34 disposed below the support 7 and the brace 22 with the engagement piece 41 and raising the lifting portion 35, the brace 22 Is bent and the halfway portion 37 pushes the lower surface of the rear support member 7 upward (indicated by a dashed line in FIGS. 1 and 8).
[0036]
For this reason, when the brace 22 comes into contact with the running surface 8 when the vehicle 1 is traveling on a rough road, even if a large impact force is transmitted from the brace 22 to the rear support member 7, the transmission of the impact force is as described above. The gap 43 prevents this. Therefore, it is possible to prevent the buffer 25 of the rear support 7 from being damaged by the impact force.
[0037]
On the other hand, when the vehicle 1 is lifted by the jack 34 as described above, the middle part 37 of the brace 22 is bent upward and pushes the lower surface of the rear support 7, so that the suspension member 20 is attached to each end of the brace 22. The external force which is directed upward is given by the part side and the rear support member 7 and is raised. Therefore, as compared with the case where the suspension member 20 is lifted by applying an external force only from the brace 22, the external force applied to the suspension member 20 is dispersed and the deformation of the suspension member 20 is prevented, and accordingly, the vehicle The increase of 1 is made in a stable state.
[0038]
The lower surface of the brace 22 is linearly formed substantially horizontally in a front view of the vehicle body 2 (FIG. 1), and a part of the upper surface of the middle portion 37 of the brace 22 bulges upward to form the gap having a predetermined size. 43 are formed.
[0039]
For this reason, the gap 43 is provided below the brace 22 in a state where a ground clearance of a predetermined size is secured over the entire width of the vehicle body 2.
[0040]
Further, the middle part 37 of the brace 22 has a larger section modulus due to an increase in the cross-sectional area due to the bulging than the end side thereof, and therefore, the bending of the middle part 37 of the brace 22 is increased. Is suppressed to a small value. Therefore, the middle portion 37 of the brace 22 is prevented from vibrating up and down during traveling of the automobile 1, and the gap 43 is maintained at a predetermined size.
[0041]
A rubber or resin buffer 44 is provided in the gap 43, and the buffer 44 is supported by the brace 22 which is at least one of the brace 22 and the rear support 7. More specifically, the buffer 44 is supported by one of the braces 22, and a slight gap is provided between the lower surface of the other rear support 7 and the buffer 44. .
[0042]
Therefore, even if the brace 22 vibrates and collides with the lower surface of the rear support member 7 to generate a large impact force when the vehicle 1 is traveling on a rough road, the impact force is absorbed by the buffer 44. You.
[0043]
Although the above description is based on the illustrated example, when the automobile 1 is a front-rear wheel drive type (4WD) and a long propulsion shaft is provided before and after the drive unit 5 is interlockedly connected to the rear wheels, the vehicle body 2 When viewed from the front (FIG. 1), a space surrounded by the suspension member 20, the brace 22, the rear support 7, and the jack receiving portion 36 may be used for disposing the propulsion shaft.
[0044]
When the vehicle 1 is lifted by the jack 34, the lifting part 35 of the jack 34 is disposed below the middle part 37 of the brace 22 and the projecting end 33 of the jack receiving part 36, and the lifting part 35 is raised. Then, the suspension member 20 may be raised by the elevating part 35 via the midway part 37 of the brace 22 and the jack receiving part 36.
[0045]
In addition, the buffer 44 may be supported by the rear support 7 or may be supported so as to straddle the brace 22 and the rear support 7, and the buffer 44 is provided in the entire space 43. You may.
[0046]
【The invention's effect】
The effects of the present invention are as follows.
[0047]
The invention according to claim 1 is a suspension member which extends in the width direction of the vehicle body, is curved so that a middle part in the longitudinal direction thereof has a convex shape upward, and each end in the longitudinal direction is connected to the vehicle body frame; A vehicle suspension system comprising a brace extending below the member in the width direction of the vehicle body, being provided at both ends of the suspension member, and being connected to each of these ends,
[0048]
A jack receiving portion projecting downward from a middle portion of the suspension member and having a protruding end portion capable of vertically opposing a lifting / lowering portion of a jack placed on a running surface; Are connected to a middle part in the longitudinal direction of the brace.
[0049]
For this reason, since the suspension member and each halfway portion of the brace are connected to each other by the jack receiving portion, the suspension member is more reliably reinforced by the brace via the jack receiving portion, and its strength is reduced. improves.
[0050]
Since the suspension member is reinforced by use of the jack receiving portion, the strength of the suspension member can be improved by a simple configuration for this use.
[0051]
According to a second aspect of the present invention, the suspension member and the brace are overlapped with each other in the vertical direction over substantially the entire length of the brace.
[0052]
Therefore, the suspension member, the brace, and the jack receiving portion for connecting the suspension member and the brace to each other are arranged on a virtual vertical plane extending in the width direction of the vehicle body. The strength with respect to the external force in the vertical direction is more reliably improved, that is, the strength with respect to the external force from the wheel suspended on the suspension member during traveling is more reliably improved.
[0053]
According to a third aspect of the present invention, there is provided an automobile having a support member projecting downward from a middle portion of the suspension member and supporting a driving unit for traveling and the like,
[0054]
The upper surface of the middle part of the brace and the lower surface of the support body face each other, and in the free state of the brace, a gap is provided between the upper surface of the middle part of the brace and the lower surface of the support body. When the vehicle is lifted by raising the lifting section of the jack from below each of the middle portions of the brace, the middle portion of the brace pushes up the lower surface of the support.
[0055]
Therefore, when the brace comes into contact with the running surface when the vehicle is traveling on a rough road, even if a large impact force is transmitted from the brace to the support, the transmission of the impact force is prevented by the gap. Therefore, it is possible to prevent the shock absorber from damaging the buffer of the support.
[0056]
On the other hand, when the vehicle is lifted by the jack as described above, the middle part of the brace pushes up the lower surface of the support, so that the suspension member exerts an external force directed upward by each end of the brace and the support. Given and raised. Therefore, as compared with the case where the suspension member is lifted by applying an external force only from the brace, the external force applied to the suspension member is dispersed and the suspension member is prevented from being deformed, and the rise of the vehicle is correspondingly stable. It is done in the state where it was done.
[Brief description of the drawings]
FIG. 1 is a partially enlarged detailed view of FIG. 3;
FIG. 2 is a front side view of the automobile.
FIG. 3 is a front view of the front part of the automobile.
FIG. 4 is a front plan view of the vehicle.
FIG. 5 is a partially enlarged detailed view of FIG. 4;
FIG. 6 is a sectional view taken along line 6-6 of FIG. 5;
7 is a sectional view taken along line 7-7 in FIG. 5;
8 is a sectional view taken along line 8-8 in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automobile 2 Body 3 Wheel 4 Suspension device 5 Drive unit 6 Support body 7 Support body 8 Running surface 11 Center part 13 Body frame 17 Midway part 18 End part 20 Suspension member 22 Brace 25 Buffer body 33 Protruding end part 34 Jack 35 Elevating part 36 jack receiving part 37 halfway part 43 gap 44 cushioning body

Claims (3)

A suspension member that extends in the width direction of the vehicle body and is curved so that a middle portion in the longitudinal direction thereof has a convex shape upward and each end in the longitudinal direction is connected to the vehicle body frame; and a width of the vehicle body below the suspension member. And a brace extending at both ends of the suspension member and being connected to the ends of the suspension member.
A jack receiving portion projecting downward from a middle portion of the suspension member and having a protruding end portion capable of vertically opposing a lifting / lowering portion of a jack placed on a running surface; A suspension system for a motor vehicle, wherein the vehicle is connected to a middle part in the longitudinal direction of the brace. 2. The vehicle suspension according to claim 1, wherein the suspension member and the brace are overlapped with each other in a vertical direction over substantially the entire length of the brace. In an automobile provided with a support member that protrudes downward from a middle portion of the suspension member and supports a driving unit for traveling and the like,
The upper surface of the middle part of the brace and the lower surface of the support body face each other, and in the free state of the brace, a gap is provided between the upper surface of the middle part of the brace and the lower surface of the support body. 3. The vehicle according to claim 1, wherein when the vehicle is lifted by lifting the lifting portion of the jack from below each halfway portion of the brace, the middle portion of the brace pushes up the lower surface of the support. Suspension system.

Images