JP2003072337A - Suspension for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a strut type suspension for an automobile allowing camber control. SOLUTION: This suspension for the automobile comprises a holding part 11 that holds the tip of a rod 5 and is dampably disposed on the inner surface of an insulator 14 of a car body mounting part via a mount rubber 13 and an upper cover 7 that is disposed on the lower surface of the holding part 11 and holds a coil spring 2 and a lower cover 8. A first rod 16 for camber control projects downwardly from the insulator 14 and on the outside of the coil spring 2 in parallel with the rod 5, a second rod 17 for camber control is pivoted a the tip of the first rod 16 for camber control, and the other end of the second rod 17 for camber control is pivoted at the upper end of a cylinder 4 through the clearance of the coil spring 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle suspension, and more particularly to a strut suspension.

[0002]

2. Description of the Related Art Since strut suspensions have a wider engine room than high mount upper arms and double wishbones, most FF vehicles use strut suspensions for the front suspension. Also, FR vehicles are often used for cost reasons.

A strut type suspension 101 of a conventional example shown in FIG. 3 includes an upper insulator 103 provided on a vehicle body 102 and the upper insulator 10.
The upper insulator 103 is provided with a shock absorber 104 fixed to the outer cylinder portion 105, the outer cylinder portion 105 fixed to the vehicle body 102, the mount rubber 106 provided along the inner side surface of the outer cylinder portion 105, This mount rubber 10
The inner cylinder portion 107 is formed of a bottomed cylinder body that is open upward and is provided inside the inner cylinder 6. This inner cylinder portion 107
The buffer 104 is fixed to the lower surface 108 of the.

The shock absorber 104 is fixed in a state of being in contact with the lower surface 108 of the inner cylindrical portion 107 in the upper cover 1.
11, a coil spring 113 provided on the upper cover 111 via a rubber sheet 112, and a lower cover 114 provided on the lower end of the coil spring 113. A shock absorber 115 is provided inside the coil spring 113. It is provided on the same axis.
The shock absorber 115 has a cylinder 116 fixed in a state of being inserted into the lower cover 114, a rod 117 extending upward from a piston accommodated in the cylinder 116, and an externally fitted state on an upper end side of the rod 117. The guide member 118 is fixed and houses the cylinder 116. The shock absorber 115 is fixed to the upper insulator 103 by fastening a nut 119 to the upper end portion of the rod 117 that passes through the upper cover 111 and the inner cylinder portion 107 of the upper insulator 103. Cylinder 116
At a lower end portion thereof, a fixing portion 120 fixed to an axle beam, a suspension arm, a link or the like (not shown) is provided.

[0005]

However, in all of the strut suspensions up to now, the nuts are attached to the rod 117 through which the upper cover 111 and the inner cylinder portion 107 of the upper insulator 103 are inserted, as in the conventional example described above. Since 119 is fastened and fixed, it is difficult to balance the alignment change, and the tread change and the ground camber change have a trade-off relationship. That is, it is desirable that the lower arm be close to horizontal in order to reduce the tread change,
Then, the change of the outer wheel to the ground camber becomes large at the time of rolling, while on the other hand, if the strut is tilted inward, both the tread change and the ground camber change at the time of rolling can be made small, but then the strut tower will overhang in the engine room. become.

Therefore, an object of the present invention is to solve the above-mentioned problems of the strut system and to provide a strut type vehicle suspension which enables a camber control.

[0007]

As a result of intensive studies to solve the above-mentioned problems, the present inventor utilized the linear displacement of the shock absorber in the strut suspension to force the entire shock absorber inside the vehicle body during rolling. It was found that the camber control can be favorably carried out by moving it to, and the present invention has been completed. That is, the strut type automobile suspension of the present invention is as follows.

<1> A coil spring, and a shock absorber provided inside the coil spring, the shock absorber having a rod provided with a piston at a lower end thereof, and the piston being inserted therein and a vehicle. A vehicle suspension comprising a cylinder having a fixing portion attached to the tire side, and a holding portion that is attached to the inner surface of the vehicle body attaching portion insulator via the mount rubber and has a tip end of the rod held by the holding portion. An upper cover that is provided on a lower surface of the holding portion and holds the coil spring together with a lower cover that is provided at a lower portion of the cylinder, and a rod provided below the vehicle body mounting portion insulator, in the vehicle suspension. Parallel to the outside of the coil spring, the camber controller The first rod for camber projecting, the second rod for camber control is pivotally supported at the tip of the first rod for camber control, and the other end of the second rod for camber control passes through the gap of the coil spring. A suspension for an automobile, wherein the suspension is pivotally supported on an upper end of a cylinder, and the second rod for camber control pushes or pulls the entire shock absorber inward of the vehicle body when the cylinder rises.

<2> In the vehicle suspension of <1> above, the first camber control rod projects from the vehicle body outer region of the vehicle body mounting portion insulator and is pivotally supported at the tip of the first camber control rod. The angle formed by the second camber control rod and the first camber control rod is maintained at 90 ° or more even when the cylinder is maximally raised, and when the cylinder is raised, the camber control second rod is made. A rod is an automobile suspension that pushes the entire shock absorber toward the inside of the vehicle body.

<3> In the vehicle suspension of <1>, the first camber control rod projects from the vehicle body inner region of the vehicle body mounting portion insulator and is pivotally supported at the tip of the first camber control rod. An angle formed by the second camber control rod and the first camber control rod is maintained to be substantially 90 ° at rest, and when the cylinder is raised, the second camber control rod causes the shock to occur. This is an automobile suspension that pulls the entire absorber inside the vehicle body.

<4> The vehicle suspension according to any one of the above <1> to <3>, wherein a curb is provided in a region inside the vehicle body of the mount rubber.

<5> A coil spring and a shock absorber provided inside the coil spring. The shock absorber includes a rod having a piston at its lower end, and a piston inserted therein and a vehicle body. A vehicle suspension comprising a cylinder having a fixed portion attached to a tire side, the outer cylinder body being vibration-isolatedly installed on an inner surface of a vehicle body attachment section insulator via a mount rubber, and an inner surface of the outer cylinder body. In an automotive suspension comprising an inner cylindrical body rotatably supported via a radial ball bearing, a lower surface of an annular plate formed inside along an inner peripheral edge of an upper end of the inner cylindrical body, and The upper surface of the upper cover that holds the coil spring together with the lower cover provided in the lower part of the cylinder is coaxial with the cylindrical guide. And a camber control first rod projects downward from the inner cylinder outside the coil spring, and a camber control second rod is pivotally supported at the tip of the camber control first rod. The other end of the second camber control rod is pivotally supported on the upper end of the cylinder through the gap of the coil spring, and whether the second camber control rod pushes the entire shock absorber inward of the vehicle body when the cylinder rises. Or, it is an automobile suspension characterized by being pulled.

<6> In the automobile suspension according to <5>, the camber control first rod projects from the vehicle body outer region of the inner cylinder and is pivotally supported at the tip of the camber control first rod. The angle formed by the second control rod and the first camber control rod is maintained at 90 ° or more even when the cylinder is maximally raised, and the second camber control rod is raised when the cylinder is raised. Is an automobile suspension that pushes the entire shock absorber inside the vehicle body.

<7> In the automobile suspension according to <5>, the camber control first rod projects from the vehicle body inner side region of the inner cylinder and is pivotally supported at the tip of the camber control first rod. The angle formed by the second control rod and the first camber control rod is substantially 90 ° at rest.
Is maintained, and the second camber control rod pulls the entire shock absorber toward the inside of the vehicle body when the cylinder is raised.

<8> The automobile suspension according to any one of <5> to <7>, wherein the cylindrical guide is a vibration-proof rubber alone or a laminated body of a vibration-proof rubber and a metal plate. .

According to the inventions <1> to <7>, the vertical linear displacement due to the stroke of the cylinder of the shock absorber is forcibly changed into a displacement for moving the entire shock absorber left and right while receiving the vertical load. This makes it possible to reduce both the tread change and the ground camber change during roll without overhanging the strut tower in the engine room.

In particular, in the invention of the above item <4>, the presence of the currant can favorably move the entire shock absorber to the left and right. Further, in the invention of the above item <8>, it is possible to smoothly move the entire shock absorber to the inside of the vehicle body by favorable shear deformation of the cylindrical guide.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be specifically described below. FIG. 1 shows a suspension 1 according to an embodiment of the present invention. The suspension 1 includes a coil spring 2 and a shock absorber 3 provided inside the coil spring 2.

The shock absorber 3 includes a cylinder 4
And a rod 5 extending upward from a piston (not shown) housed in the cylinder 4,
A screw part to which the nut 6 is fixed is formed at the upper end of the.

The coil spring 2 is arranged between the upper cover 7 coaxially provided on the upper end of the coil spring 2 and the lower cover 8 coaxially provided on the lower end of the coil spring 2, and is coaxially provided inside the coil spring 2. A lower cover 8 is externally fitted and fixed to the lower end of the cylinder 4 of the shock absorber 3. The lower end of the cylinder 4 is provided with a fixing portion (not shown) fixed to other members of the suspension such as an axle beam, a suspension arm and a link, or an axle. The coil spring 2 is locked to the peripheral portions of the upper cover 7 and the lower cover 8 via the rubber sheet 9, and the rubber sheet 9 can also perform a good shock absorbing function.

The mount 1 is mounted on the upper surface of the upper cover 7.
The radial ball bearing 12 is fixedly mounted on the outer peripheral surface of the radial ball bearing 12, and the inner peripheral surface of the cylindrical holding portion 11 is externally fitted and fixed to the outer peripheral surface of the radial ball bearing 12. As a result, the coil spring 2 and the shock absorber 3 provided inside thereof can rotate integrally with the holding portion 11.

A nut 6 is fastened to the upper end of the rod 5 which is inserted into the radial ball bearing 12 through the upper cover 7 and the mount 10. In this way the rod 5
The holding portion 11 holding the tip of the
It is installed on the inner surface of the vehicle body mounting portion insulator 14 via the so as to be capable of vibration isolation. In addition, by forming the flange 15 on the outer side along the outer peripheral edge of the lower end of the holding portion 11, it becomes possible to widen the joint surface by vulcanization adhesion or the like with the mount rubber 13.

In the preferred embodiment of the present invention shown in FIG. 1, the first camber control rod 16 projects downward from the outer side region of the vehicle body mounting portion insulator 14 outside the coil spring 2 in parallel with the rod 5. A second camber control rod 17 is pivotally supported at the tip of the first camber control rod 16 via, for example, a knuckle joint 18. The first camber control rod 16 is fixed in the vehicle body mounting region of the vehicle body mounting portion insulator 14 by means such as screwing or welding.

Second rod 17 for camber control
The other end of is passed through an arbitrary gap of the coil spring 2 and is pivotally supported on the upper end 19 of the cylinder 4. Specifically, a bifurcated shaft is projected to the upper end of the outer side of the vehicle body of the cylinder 4, the end of the flattened second camber control rod 17 is inserted between them, and a knuckle pin is inserted through these ends, thereby favorably supporting the pivot. can do.

First rod 16 for camber control
The angle between the camber control second rod 17 and the camber control second rod 17 is set to maintain 90 ° or more even when the cylinder 4 is maximally raised. As a result, when the second rod 17 for camber control rotates about the knuckle joint 18 as a fulcrum when the cylinder rises in the arrow direction due to shock absorption, the entire shock absorber 3 is pushed inside the vehicle body in the arrow direction. .

In order to carry out such movement more smoothly, it is preferable to provide the mount rubber 13 with the curls 20. The size of the currant 20 is preferably large unless the supporting function of the mount rubber 13 is impaired. As a movement amount of the entire shock absorber 3 inward of the vehicle body, it is preferable to secure about 30 mm in order to perform good camber control.

FIG. 2 shows a suspension 21 according to another embodiment of the present invention. Suspension 2 shown in FIG.
1 has basically the same structure as that shown in FIG. 1 except that the location of the camber control rod is different from that shown in FIG. That is, in another preferred embodiment of the present invention shown in FIG. 2, the first camber control rod 3 is provided in parallel with the rod 25 downward from the inside of the vehicle body of the vehicle body mounting portion insulator 34 to the outside of the coil spring 22.
6 protrudes, and at the tip of the first camber control rod 36, the second camber control rod 3
7 are pivoted. The other end of the second camber control rod 37 is pivotally supported on the upper end of the cylinder 24 through an arbitrary gap of the coil spring 22 as in the case of the preferred example shown in FIG.

Here, the angle formed by the first camber control rod 36 and the second camber control rod 37 is set to maintain substantially 90 ° when stationary. As a result, when the cylinder rises in the arrow direction due to shock absorption, the second camber control rod 37 pulls the entire shock absorber 23 in the arrow direction inside the vehicle body due to its action.

FIG. 3 shows a suspension 41 according to still another embodiment of the present invention. Suspension 41
Includes a coil spring 42 and a shock absorber 43 provided inside the coil spring 42. The mounting structure of the shock absorber 43 and the coil spring 42 is the same as that of the above-described preferred example, but other than that. The basic structure of is different.

That is, the suspension 41 has an outer cylindrical body 51 installed on the inner surface of the vehicle body mounting portion insulator 54 via a mount rubber 53 in a vibration-proof manner, and the outer cylindrical body 51.
Inner cylindrical body 50 rotatably supported via a radial ball bearing 52 fitted on the inner surface of the inner cylindrical body 50.
The lower surface of the annular plate 55 formed inside along the inner peripheral edge of the upper end of the above and the upper surface of the upper cover 47 are coaxially connected via the cylindrical guide 60. By allowing the outer cylinder body 51 and the inner cylinder body 50 to rotate freely, the entire strut can rotate while receiving a vertical load,
It is possible to prevent the steering force from becoming heavy during steering.
The cylindrical guide 60 is formed of a vibration proof rubber alone or a laminated body of a vibration proof rubber and a metal plate in order to favorably shear and deform the coil spring 42 and the shock absorber 43 to move inside the vehicle body. Is preferred.

The first rod 5 for camber control is located below the inner cylinder 50 and outside the coil spring 42.
6 protrudes, and at the tip of the first camber control rod 56, the second camber control rod 5
7 is pivotally supported, and second camber control rod 5
The other end of 7 passes through the gap of the coil spring 42 and is pivotally supported on the upper end of the cylinder 44. The structure and operation of the first camber control rod 56 and the second camber control rod 57 are similar to those of the preferred example shown in FIG.

That is, the angle formed by the first camber control rod 56 and the first camber control rod 57 is 90 even when the cylinder 44 is maximally raised.
By setting so as to maintain at least °, the second camber control rod 57 pushes the entire shock absorber 43 inward in the vehicle body in the arrow direction when the cylinder 44 moves upward in the arrow direction due to shock absorption. It will be. At this time, the mount rubber 53 is not deformed, but the cylindrical guide 60 is sheared and deformed as shown in the figure, whereby the entire shock absorber is moved to the inside of the vehicle body.

A suspension according to still another embodiment of the present invention is the suspension shown in FIG. 2 as the structure and operation of the first camber control rod and the second camber control rod in the preferable example shown in FIG. It is the case of incorporating. In this case, the angle formed by the first camber control rod and the second camber control rod is substantially 9 when stationary.
When the cylinder is set to maintain 0 ° and the cylinder is lifted in the direction of the arrow due to shock absorption, the second camber control rod pulls the entire shock absorber body inward in the direction of the arrow due to its action.

[0034]

As described above, according to the present invention, the vertical linear displacement due to the stroke of the cylinder is forcibly changed into the displacement for moving the entire shock absorber left and right while receiving the vertical load. You can As a result, both the tread change and the ground camber change at the time of rolling can be reduced without the strut tower projecting into the engine room, and a strut suspension capable of camber control can be obtained.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a strut suspension which is a preferred example of the present invention.

FIG. 2 is an explanatory view showing a strut suspension which is another preferred example of the present invention.

FIG. 3 is an explanatory view showing a strut suspension which is still another preferred example of the present invention.

FIG. 4 is a cross-sectional view showing a conventional strut suspension.

[Explanation of symbols]

1, 21, 41 Suspension 2, 22, 42 Coil spring 3, 23, 43 Shock absorber 4, 24, 44 Cylinder 5, 25 Rod 6 Nut 7, 47 Upper cover 8 Lower cover 9 Rubber sheet 10 Mount 11 Holding part 12, 52 Radial ball bearings 13,53 Mount rubber 14,34,54 Insulator 15 Flange 16,36,56 Camber control first rod 17,37,57 Camber control second rod 18 Knuckle joint 19 Upper end 20 Curb 50 Inner cylinder 51 Outer cylinder 55 Annular plate 60 Cylindrical guide

Claims (8)

[Claims] 1. A coil spring, and a shock absorber provided inside the coil spring,
The shock absorber is an automobile suspension including a rod having a piston provided at a lower end thereof and a cylinder having a fixing portion into which the piston is inserted and which is attached to a tire side of a vehicle, and a tip of the rod is held by the shock absorber. And a holding portion that is installed on the inner surface of the vehicle body mounting portion insulator via a mount rubber so as to be vibration-proof, and an upper portion that is provided on the lower surface of the holding portion and that holds the coil spring together with a lower cover that is provided below the cylinder. In a vehicle suspension including a cover, a first camber control rod protrudes downward from the vehicle body mounting portion insulator outside the coil spring in parallel with the rod, and the camber control first rod 2nd lock for camber control at the tip Is pivotally supported, and the other end of the second camber control rod is pivotally supported by the upper end of the cylinder through the gap of the coil spring, and the second camber control rod is lifted by the cylinder to move the camber control second rod. Or push the whole thing inside the car,
Alternatively, an automobile suspension characterized by being pulled. 2. A camber control second rod and a camber control second rod, wherein the camber control first rod projects from the vehicle body outer region of the vehicle body mounting portion insulator and is pivotally supported at the tip of the camber control first rod. The angle formed by the first rod is maintained at 90 ° or more even when the cylinder is maximally raised, and when the cylinder is raised, the second camber control rod pushes the entire shock absorber inside the vehicle body. The vehicle suspension according to claim 1. 3. A camber control second rod and a camber control second rod, wherein the camber control first rod projects from a vehicle body inner region of the vehicle body mounting portion insulator and is pivotally supported at the tip of the camber control first rod. The angle formed by the first rod is maintained to be substantially 90 ° at rest, and when the cylinder is raised, the second camber control second is provided.
The vehicle suspension according to claim 1, wherein a rod pulls the entire shock absorber toward the inside of the vehicle body. 4. The vehicle suspension according to claim 1, wherein a curl is provided in a vehicle body inner region of the mount rubber. 5. A coil spring, and a shock absorber provided inside the coil spring,
The shock absorber is a vehicle suspension comprising a rod having a piston at a lower end thereof and a cylinder having a fixing portion into which the piston is inserted and which is attached to the tire side of the vehicle. In an automotive suspension comprising an outer cylinder body that is installed on the inner surface of the mounting portion insulator in a vibration-proof manner, and an inner cylinder body that is rotatably supported on the inner surface of the outer cylinder body via radial ball bearings, The lower surface of the annular plate formed inside along the inner peripheral edge of the upper end of the inner tubular body, and the upper surface of the upper cover that holds the coil spring together with the lower cover provided in the lower portion of the cylinder, through a cylindrical guide. Coaxially connected, and the first camber control rod projects downward from the inner cylinder outside the coil spring. The second camber control rod is pivotally supported at the tip of the first camber control rod, and the other end of the second camber control rod is pivotally supported at the upper end of the cylinder through the gap of the coil spring. The second suspension rod for camber control pushes or pulls the entire shock absorber toward the inside of the vehicle body when the cylinder is raised. 6. A camber control second rod and a camber control second rod, wherein the camber control first rod projects from the vehicle body outer region of the inner cylinder, and is pivotally supported at the tip of the camber control first rod. An angle formed by one rod is maintained at 90 ° or more even when the cylinder is maximally raised, and when the cylinder is raised, the second camber control rod pushes the entire shock absorber toward the inside of the vehicle body. Item 5. The automobile suspension according to item 5. 7. A camber control second rod and a camber control second rod, wherein the camber control first rod projects from a vehicle body inner side region of the inner cylinder, and is pivotally supported at a tip of the camber control first rod. The angle formed by one rod is substantially 90 when stationary.
6. The vehicle suspension according to claim 5, wherein the second rod for camber control pulls the entire shock absorber toward the inside of the vehicle body when the cylinder is raised so that the angle is maintained. 8. The suspension for an automobile according to claim 5, wherein the cylindrical guide is a vibration proof rubber alone or a laminated body of a vibration proof rubber and a metal plate.