JP2004301228A - Coupling part structure for joint member and arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coupling part structure for a joint member and an arm capable of reducing transmission of vibration into a car without impairing steering stability of an automobile. <P>SOLUTION: This coupling part structure is for a joint member having a cylindrical enclosure part to enclose an elastic part of an elastic member, and an arm of sheet metal having a mounting hole provided with a holding part for holding the enclosure part of the joint member opened in a sheet part to be coupled with the joint member. A reinforcement ring is installed around the enclosure part of the joint member, and the reinforcement ring is brought into contact with the peripheral part of the mounting hole. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
[Industrial applications]
The present invention relates to a structure of a joint portion between a joint member used for a suspension system of an automobile and a sheet metal arm.
[0002]
[Prior art]
One of sheet metal arms used for automobile suspensions, one of which is connected to the wheel side via a joint member such as a ball joint, and the other is connected to the vehicle body side via a joint member such as a bush. was there.
[0003]
In the arm having the above structure, the structure of the joint between the arm 111 and the bush 151 connected to the vehicle body will be described with reference to FIG. 151 is a bush which is a joint member. The bush 151 is made of metal and has a cylindrical inner cylinder 153, and a metal cylindrical outer cylinder 152, which is a holding portion, which is arranged concentrically with the inner cylinder 153 outside the inner cylinder 153, and an inner cylinder 153. It comprises an elastic portion 154 made of an elastic member such as rubber filled between the outer cylinders 152. Reference numeral 111 denotes a sheet metal arm, and a mounting hole 113 is formed by burring at the vehicle body side end of an arm 112 made of a single plate. The bush 151 was press-fitted into the mounting hole 113, and the arm 111 and the bush 151 were connected.
[0004]
[Problems to be solved by the invention]
Here, there is a problem that vibration generated by road surface stimulus while the vehicle is running is transmitted to the vehicle body via a suspension device and the like, which hinders the comfort of the ride as vibration and noise. Is required. In order to absorb vibration and reduce transmission to the vehicle body, a bush 151 which is a joint member having an elastic portion 154 made of an elastic member is used at a connecting portion of the arm 151. The arm 111 having the above-described structure is used. Since the mounting hole 113 of the bush 151 is formed in one plate, the rigidity of the burring portion 114 protruding by burring and the rigidity around the mounting hole 113 are low. Therefore, the holding force of the bush 151 in the arm 111 is weak, and the bush 151 itself is easily shaken when the vibration is transmitted. Therefore, when the vibration from the wheel is transmitted to the arm 111 via the ball joint 161, the entire arm 111 is Was easily shaken, and the vibration transmitted to the vehicle body increased accordingly. Therefore, it is conceivable to increase the axial length of the burring portion 114 in order to increase the holding force of the bush 151 in the arm 111 and suppress the swing. However, if the axial length is increased, the burring portion 114 becomes thinner. Therefore, the strength may not be maintained. Further, it is conceivable to reduce the spring constant of the elastic portion 154 of the bush 151 in order to enhance the absorption of vibration. However, the steering stability of the automobile may be impaired by reducing the spring constant.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems and to provide a joint structure between a joint member and an arm that can reduce the transmission of vibration into a vehicle without impairing the steering stability of the vehicle.
[0006]
[Means for Solving the Problems]
The configuration of the present invention is as follows.
[0007]
1. An attachment hole is provided in the plate-shaped portion having a joint member having a cylindrical holding portion for holding an elastic portion made of an elastic member, and a holding portion for connecting the joint member and holding the holding portion of the joint member. This is a joint structure with a sheet metal arm, in which a reinforcing ring is attached to the outer periphery of the holding portion of the joint member, and the reinforcing ring contacts the peripheral portion of the mounting hole.
[0008]
2. The reinforcing ring is mounted on the outer periphery of the holding portion of the joint member by press fitting.
[0009]
3. The reinforcing ring has a substantially L-shaped cross section and abuts on the side opposite to the mounting hole of the arm.
[0010]
4. The mounting hole of the arm is formed by burring.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
[0012]
FIG. 1 shows an arm 11 made of sheet metal according to an embodiment of the present invention. As shown in FIG. 1A, an arm 11 is an A-shaped arm formed by a single plate having a substantially U-shape in plan view, and one end which is a vertex of an arm portion 12 extending to both sides in a U-shape. As shown in FIG. 1A, the wheel-side mounting hole 15 is opened by downward burring, and a ball joint 61, which is a joint member connected to the wheel-side member, is connected thereto. Further, the arm portion 12 extending on both sides in a U-shape is provided with a mounting hole 13 on the other end side in a single plate-like portion by inward burring, and a joint member for connecting the body side member and the arm 11. Are connected.
[0013]
The structure of the joint between the bush 51 and the arm 11 will be described in detail with reference to FIG. Reference numeral 51 denotes a bush, which is a metal inner cylinder 53, an outer cylinder 52, which is a metal cylinder holding part disposed concentrically with the inner cylinder 53 outside the inner cylinder 53, and an inner cylinder 53. And an elastic portion 54 made of an elastic member such as rubber filled between the outer cylinder 52 and the outer cylinder 52. The bush 51 is held by a burring portion 14 protruding from the arm portion 12. The reinforcing ring 1 having an L-shaped cross section is press-fitted into the outer cylinder 52 of the bush 51 opposite to the protruding burring portion 14. The reinforcing ring 1 includes a cylindrical portion 3 having an inner diameter slightly smaller than the outer diameter of the bush 51 and a flange portion 2 extending outward from one end of the cylindrical portion 3. The two-side end is in contact with the periphery of the mounting hole 13 of the arm 12 opposite to the burring 14.
[0014]
Next, a step of connecting the bush 51, the arm 11, and the reinforcing ring 1 will be described with reference to FIG. First, the bush 51 is pressed into the mounting hole 13 from the opposite side of the burring portion 14 of the arm 11 to a predetermined position. Subsequently, the reinforcing ring 1 is pressed into the outer periphery of the outer cylinder 52 of the bush 51 from the flange portion 2 side, and the flange portion 2 and the end portion of the cylindrical portion 3 on the flange portion 2 side abut against the arm portion 12 to complete the connection. I do.
[0015]
Therefore, in the structure of the joint between the bush 51 and the arm 11 as described above, the reinforcing ring 1 attached to the outer cylinder 52 of the bush 51 is in contact with the peripheral portion of the mounting hole 13 of the bush 51 in the arm 11. The rigidity of the periphery of the mounting hole 13 of the arm 11 increases, and the holding force of the bush 51 on the arm 11 increases, so that the bush 51 itself does not easily shake. Therefore, when the vibration from the wheel is transmitted via the ball joint 61, the entire arm 11 can be prevented from largely shaking. Further, since the reinforcing ring 1 is mounted on the outer cylinder 52 of the bush 51 by press-fitting, assembly is easy and deformation of the arm 11 and the bush 51 due to heat as in the case where the reinforcing ring is adhered to the arm by welding is performed. Do not give. Further, in the reinforcing ring 1, an L-shaped ring composed of a cylindrical portion 3 and a flange portion 2 extending outward from one end of the cylindrical portion 3 is provided on a side opposite to the holding portion 14 of the mounting hole 13 of the arm 11. When they are in contact with each other, the outer cylinder 52 of the bush 51 is held by the holding portion 14 and the cylindrical portion 3, so that the holding force of the bush 51 is further increased. In addition, since the periphery of the mounting hole 13 of the arm 11 is made thicker by the flange portion 2, the rigidity around the mounting hole 13 of the arm 11 is increased. In addition, since the mounting hole 13 of the arm 11 is formed by burring, the hole is punched in the plate portion, and then the holding portion holding the joint member is joined by welding to form the mounting hole. Is easy.
[0016]
In the above embodiment, the reinforcing ring 1 has a substantially L-shaped cross section. However, the shape is not limited, and any shape may be used as long as it can reinforce the periphery of the mounting hole 13 of the bush 51 in the arm 11. Further, the joint member is not limited to the bush 51, and a spherical convex portion is formed on an outer periphery of a central portion of the inner cylinder in the axial direction, and the bearing holds the spherical convex portion in a swingably rotatable manner. Even when a pillow ball bush or the like composed of a housing and an elastic portion formed by filling an elastic member between the housing and the outer cylinder is used, the same effect can be obtained by the joint portion structure with the arm described above. it can.
[0017]
【The invention's effect】
As described above, according to the present invention, a joint member having a cylindrical holding portion for holding an elastic portion made of an elastic member, and a holding portion for connecting the joint member and holding the holding portion of the joint member are provided. Since the mounting hole is a joint structure with a sheet metal arm opened in the plate-like portion, a reinforcing ring is attached to the outer periphery of the holding portion of the joint member, and the reinforcing ring comes into contact with a peripheral portion of the mounting hole, The rigidity of the periphery of the mounting hole formed in the arm is increased, and the holding force of the joint member on the arm is increased, so that the joint member is less likely to swing. Therefore, when the vibration from the wheels is transmitted, it is possible to suppress the entire arm from swinging greatly, so that the transmission of the vibration to the vehicle body is suppressed, and the riding comfort is improved. In addition, when the reinforcing ring is mounted on the outer periphery of the holding portion of the joint member by press fitting, assembly is easy, and the arm or bush is not deformed by heat unlike the case where the reinforcing ring is bonded to the arm by welding. Therefore, high quality can be maintained. Further, when the reinforcing ring is a reinforcing ring having a substantially L-shaped cross section and is in contact with the opposite side of the holding portion of the mounting hole of the arm, the holding portion of the joint member is held by the holding portion of the arm and the cylindrical portion of the reinforcing ring. Therefore, the holding force of the joint member is further increased. In addition, since the peripheral portion of the mounting hole of the arm becomes thicker, the rigidity of the peripheral portion of the mounting hole is increased, so that transmission of vibration to the vehicle body is further suppressed and riding comfort is improved. In addition, since the mounting hole of the arm is formed by burring, manufacturing is easier than in the case where the mounting portion for holding the joint member is joined by welding after the hole is punched out of the plate portion to form the mounting hole. Yes, an increase in the number of processing steps can be suppressed.
[Brief description of the drawings]
1A and 1B show an arm according to an embodiment of the present invention, wherein FIG. 1A is a plan view and FIG. 1A is a front view.
FIG. 2 is a partial cross-sectional plan view illustrating a structure of a joint part between a joint member and an arm according to an embodiment of the present invention.
FIG. 3 is a partial cross-sectional plan view illustrating a process of connecting a joint member, an arm, and a reinforcing ring according to an embodiment of the present invention.
FIG. 4 is a partial cross-sectional plan view showing a conventional joint structure of a joint member and an arm.
[Explanation of symbols]
DESCRIPTION OF REFERENCE NUMERALS 1 reinforcing ring 11 arm 13 mounting hole 14 holding part 51 reinforcing ring 52 holding part 54 elastic part

Claims (4)

A joint member (51) having a cylindrical holding part (52) for holding an elastic part (54) made of an elastic member; and a joint part (52) of the joint member by connecting the joint member (51). A mounting hole (13) provided with a holding portion (14) for holding the joint member with a sheet metal arm (11) formed in a plate-like portion, and a holding portion (11) of the joint member (51). 52) A joint structure between a joint member and an arm, wherein a reinforcing ring (1) is mounted on an outer periphery, and the reinforcing ring (1) is in contact with a peripheral portion of the mounting hole (13). The joint part structure of a joint member and an arm according to claim 1, wherein the reinforcing ring (1) is mounted by press-fitting on an outer periphery of a holding part (52) of the joint member (51). 3. The armature according to claim 1, wherein the reinforcing ring has a substantially L-shaped cross section and abuts on a side opposite to a holding portion of the mounting hole of the arm. 4. Structure of the joint between the joint member and the arm. 4. A joint structure between a joint member and an arm according to claim 1, wherein the mounting hole (13) of the arm (11) is formed by burring.

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