JP2002333010A - Attaching structure for ball joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching structure for a ball joint capable of improving workability during attachment and detachment of the ball joint. SOLUTION: A bolt hole 7 is provided in a stud 6 of the ball joint. A fitting hole part 8 for fitting in the stud 6 is provided in a stud attaching part 2A. The stud 6 pressed in the fitting hole part 8 is fastened by a bolt 10 and it is fixed to the stud attaching part 2A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a ball joint used when a suspension link is swingably mounted.

[0002]

2. Description of the Related Art A mounting structure of a ball joint for connecting a lower link to a knuckle spindle (wheel supporting member) is a structure described in, for example, Japanese Patent Application Laid-Open No. 10-258622. That is, as shown in FIG. 5, a socket member 51 having a socket portion 51a opened downward is provided at a wheel-side end portion of the lower link 50, and a spherical guide portion 52 fitted into the socket portion 51a is provided. The stud 53 protrudes downward. A male screw is provided at a tip end (lower end) of the stud 53. Note that the stud 53 is tapered so that the tip end has a smaller diameter.

Further, a stud mounting portion 54A formed on the lower leg of the knuckle spindle 54 is provided with a through hole 55 whose axis is directed up and down. The through hole 55 is provided with the stud 53 from above. The stud 53 is tapered so that it can engage with the stud 53 when inserted. And
The stud 53 is passed through the through-hole 55 from above, the tip of the stud 53 is projected downward from the lower surface of the stud mounting portion 54A, and the nut 60 is fastened to the tip of the stud 53. It is fixed to the stud mounting portion 54A. Since the stud 53 and the through hole 55 are tapered, the stud 53
Are easily fitted into the through holes 55 and positioned.

In FIG. 5, reference numeral 56 denotes a dust cover, reference numeral 57 denotes a drive shaft, and reference numeral 58 denotes a disk rotor.

[0005]

However, in the above-mentioned mounting structure, the stud 53 is provided with the knuckle spindle 5.
4 penetrates the stud mounting portion 54A up and down.
It is required to have a length that protrudes downward from the stud mounting portion 54A so that the nut 60 can be screwed into the tip portion. For this reason, when the ball joint is attached to and detached from the knuckle spindle 54, the ball joint is connected to the stud mounting portion 5 by the length of the stud 53.
It is necessary to insert the stud 53 into the through hole 55 after being positioned above the upper surface of the 4A, or to pull the stud 53 upward from the through hole 55 by the length of the stud 53.
That is, when attaching and detaching the ball joint, it is necessary to secure a space above the through hole 55 by the length of the stud 53. Therefore, when the drive shaft 57 is arranged as shown in FIG. 5, the drive shaft 57 and the detachable ball joint interfere as shown in FIG. Therefore, it is necessary to perform the mounting operation of the ball joint while the drive shaft 57 is removed, and the workability at the time of attaching and detaching the ball joint is not good.

Further, by engaging the tapered surface (outer peripheral surface) of the stud 53 with the tapered surface (inner diameter surface) of the through hole 55,
Although the position of the stud 53 with respect to the knuckle spindle 54 is defined, when the tightening torque of the nut 60 becomes larger than the designed torque, the stud 53 is
5 may be guided by the tapered surface 5 and may be drawn into the nut 60 side (downward).

Further, since the stud 53 and the through hole 55 and the rotation axis of the nut 60 are set to be coaxial (see reference numeral P3 in FIG. 5), the tapered surface (inner diameter surface) of the through hole 55 and the stud 53 Depending on the variation in the processing accuracy of the tapered surface (outer peripheral surface), the stud 53 and the nut 60 may rotate together when the nut 60 is tightened, making it difficult to apply a predetermined tightening torque.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a ball joint mounting structure capable of improving the workability at the time of attaching and detaching the ball joint. .

[0009]

In order to solve the above-mentioned problems, the invention described in claim 1 of the present invention is one of a wheel supporting member for rotatably supporting a wheel and a vehicle body side member. A mounting structure of a ball joint for connecting a first member and a suspension link, wherein a socket portion is provided on one of the first member and the suspension link, and a spherical guide portion rotates on the socket portion. In a ball joint mounting structure for fixing a stud, which is freely fitted and protrudes from the spherical guide portion, to the other member of the first member and the suspension link, the stud provided on the other member is provided with the stud. A fitting hole to be fitted, a bolt hole provided in the stud, and a bolt hole provided in the other member and extending toward the bolt hole. A through hole which opens into Goana unit and is characterized by comprising a bolt for fastening screwed the studs to the other member in the bolt hole through the through hole.

Next, a second aspect of the present invention is characterized in that the fitting hole has an abutting surface for abutting an end surface of the stud, in contrast to the configuration of the first aspect. Things. Next, according to a third aspect of the present invention, in the configuration according to the first or second aspect, the outer peripheral surface of the stud has a taper having a small diameter at the tip end and an inner diameter of the fitting hole. The surface is also tapered to engage with the outer peripheral surface of the stud.

According to a fourth aspect of the present invention, in the configuration according to any one of the first to third aspects, the axis of the bolt hole provided in the stud is in the same direction as the axis of the stud or The studs are set in substantially the same direction and are offset from the axis of the stud. Next, a fifth aspect of the present invention is characterized in that the through hole has such a size that the bolt can be inserted with a play with respect to the configuration described in the fourth aspect.

According to a sixth aspect of the present invention, the suspension link is a lower link and the first member is a wheel supporting member. Wherein the lower link is provided with a socket portion, and the opening of the socket portion faces downward.

[0013]

According to the first aspect of the present invention, a stud is inserted into a fitting hole provided in another member and the stud is fixed by bolting, so that the length of the stud can be reduced. it can. As a result, the space required for attaching and detaching the ball joint from other members is reduced, and the workability of the attaching and detaching is improved.

Next, according to the second aspect of the present invention, the ball joint is easily positioned by abutting the stud tip end surface against the abutting surface of the fitting hole. Further, even if the bolt tightening torque increases, the position of the ball joint can be defined by the abutting surface. Next, according to the third aspect of the present invention, the stud is easily inserted (press-fitted) into the fitting hole by tapering the outer peripheral surface of the stud and the inner diameter surface of the fitting hole.

Next, according to the invention of claim 4, by providing the bolt hole along the axial direction of the stud, the screwing amount between the bolt and the bolt hole can be set large. Furthermore, although the axis of the bolt hole coincides with the rotation axis of the bolt, according to the present invention, by offsetting the axis of the stud and the axis of the bolt hole, co-rotation of the stud at the time of bolt tightening can be prevented, The tightening torque as designed can be given to the bolt.

Here, when the axis of the stud and the axis of the bolt are offset, by changing the circumferential position of the stud, the axial position of the bolt along the circle corresponding to the offset with respect to the axis of the stud is changed. According to the invention according to claim 5, the through hole has a play, thereby absorbing the displacement (variation at the time of mounting) and securely securing the bolt through the through hole. Can be screwed into.

If the positioning between the stud and the fitting hole in the circumferential direction is performed by marking or the like, the diameter of the through hole is larger than the diameter of the shaft of the bolt, and Of the shaft portion + the offset amount × 2). Next, according to the invention according to claim 6, even if the drive shaft is located above the lower link, without removing the drive shaft, the ball joint can be removed from the wheel support member,
Can be assembled.

[0018]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view of a mounting structure of a ball joint according to the present embodiment as viewed from a vehicle front side. In the present embodiment, a description will be given of an example of a ball joint mounting structure when the wheel side end of the lower link 1 is connected to the knuckle spindle 2 (wheel support member).

First, the configuration will be described. In FIG. 1, reference numeral 3 denotes a socket member having a socket portion 3a opened downward and an outward flange 3b formed on the outer peripheral surface. A screw portion 3c is formed on the upper side in the circumferential direction. The socket member 3 is a lower link 1
Of the lower flange 1b of the lower link 1 by pressing the upper surface of the outward flange 3b into contact with the contact surface 1b of the wheel end 1A of the lower link 1. Is determined. Further, the mounting hole 1a
The socket member 3 is fixed to the mounting hole 1a by screwing the nut 4 into the screw portion 3c protruding upward from the socket member 3c.

A spherical guide 5 is fitted into the socket portion 3a of the socket member 3 from below, and the spherical guide 5
A stud 6 integrated with the socket 3 protrudes downward from the socket portion 3a. The stud 6 is provided with a bolt hole 7 extending from the distal end surface along the axis P1 of the stud 6. However, the axis P2 of the bolt hole 7 is
It is offset from the axis P1 of the stud 6 by δ.

In this embodiment, the outer shape of the stud 6 is exemplified by a cylindrical shape. A stud mounting portion 2A is provided at the tip of the lower leg of the knuckle spindle 2.
Is provided. The stud attachment portion 2A is formed with a fitting hole 8 that opens to the upper surface and extends downward.
The fitting hole 8 is a bottomed and cylindrical hole having a bottom surface 8.
a constitutes the abutment surface, and the hole diameter is set to a diameter that allows the stud 6 to be fitted.

The stud 6 and the stud mounting part 2
A is provided with a marking (not shown) for confirming the positioning in the circumferential direction, and the stud 6 is pressed into the fitting hole 8 using the marking as a mark. The shaft P2 is in the bolt hole 7 and the shaft P1 of the stud 6.
It is assumed that it is set so as to be offset by δ to the outside (wheel side) in the vehicle width direction.

A through hole 9 is formed in the bottom surface 8a of the fitting hole 8 so as to be substantially coaxial with the bolt hole 7 provided in the stud 6 with the stud 6 inserted into the fitting hole 8. The diameter of the through hole 9 is set to be slightly larger than the diameter of the shaft of the bolt 10 described later, and the shaft of the bolt 10 can be inserted with play. It is not necessary to form the bolt hole 7 coaxially with the through hole 9, and the shaft P
1 may be formed coaxially. In this case, the hole diameter may be set to be larger than the above diameter.

Here, reference numeral 11 denotes a retaining plate attached to the socket member 3. The retaining plate 11 is fixed to the opening of the socket portion 3a by caulking or the like, so that the spherical guide portion 5 is connected to the socket. It is prevented from getting out of the part 3a. Reference numeral 12 denotes a cylindrical dust cover. Reference numeral 13 denotes a drive shaft, and reference numeral 14 denotes a drive shaft.
Represents disk rotors, respectively.

To attach the stud 6 to the knuckle spindle 2, first, press the stud 6 into the fitting hole 8 from above. At this time, in the present embodiment, the length of the stud 6 can be set shorter than the vertical thickness of the stud mounting portion 2A, so that the drive shaft 13 is mounted above as shown in FIG. The stud 6 without removing the drive shaft 13.
Can be attached to the fitting hole 8.

At the time of press-fitting the stud 6, a marking (not shown) attached to the outer periphery of the stud 6 and the stud mounting portion 2
Positioning of the stud 6 in the circumferential direction (positioning of the bolt hole 7) is performed so that the marking (not shown) attached to A coincides with the marking. As a result, the press-fitted stud 6
And the through hole 9 of the stud mounting portion 2A are arranged substantially coaxially.

Further, the stud 6 is press-fitted until the end surface of the stud 6 comes into contact with the bottom surface 8a (butting surface) of the fitting hole 8, so that the vertical position of the stud 6 can be easily adjusted by the bottom surface 8a. Be regulated. Next, the shaft portion of the bolt 10 is inserted into the through hole 9 from below the stud mounting portion 2A and screwed into the bolt hole 7, so that the seating surface of the bolt 10 contacts the lower surface of the stud mounting portion 2A. Fasten with a predetermined tightening torque. Thus, the stud 6 is fixed to the stud mounting portion 2A by the bolt 10.

At this time, since there is play in the through hole 9,
It is easy to insert the bolt 10, and even if there is an accuracy error in the processing of the fitting hole 8 or the like, or if there is an assembly error in the circumferential direction at the time of press-fitting the stud 6, the bolt 10 can be securely bolted. It can be screwed into the hole 7 and fastened. Also,
Since the axis P2 of the bolt hole 7, that is, the rotation axis at the time of tightening the bolt 10, and the axis P1 of the stud 6 fitted into the fitting hole 8 are offset, the co-rotation of the stud 6 at the time of tightening the bolt 10 is not achieved. Thus, the bolt 10 can be securely fastened with the designed tightening torque.

Further, since the stud 6 is abutted against the bottom surface 8a to regulate the position of the stud 6 in the vertical direction, even if the tightening torque of the bolt 10 is increased, the stud 6 can be positioned on the bolt 10 side (lower side). ) Is prevented from being drawn in. As described above, in the ball joint mounting structure according to the present embodiment, even if the drive shaft 13 and the like are mounted on the ball joint stud 6 without removing the drive shaft 13 and the like.
Not only can be attached to the knuckle spindle 2 side, but also the stud 6, that is, the ball joint can be easily positioned, so that the assembling and removing are easy.

Here, in the above-described embodiment, the case where the stud 6 has a cylindrical shape is exemplified, but the stud 6 may have a rectangular column shape such as a rectangular or hexagonal cross section. In this case, even when the axis P1 of the stud 6 and the axis P2 of the bolt 10 are set to be coaxial, co-rotation of the stud 6 when the bolt 10 is fastened can be prevented. However, there is a possibility that press-fitting of the stud 6 becomes troublesome as compared with the case of the cylindrical shape.

Although the case where the stud 6 has a cylindrical shape with a rectangular vertical section has been exemplified, as shown in FIG. 3, a taper having a small diameter at the tip end may be provided. In this case, the inner diameter surface of the fitting hole 8 is also provided with a taper which engages with the taper of the stud 6. This facilitates the press-fitting of the stud 6 into the fitting hole 8. In this case, the cross section is not limited to a circle, and even if it is rectangular or hexagonal, the tapered portion facilitates press-fitting.

Further, in the above embodiment, the bottom surface 8a of the fitting hole 8 is used as the abutting surface as the bottomed fitting hole 8, but the present invention is not limited to this. For example, the fitting hole 8 is penetrated to the lower side, the lower part of the fitting hole 8 is used as the through hole 9, and 1
Alternatively, two or more protrusions extending in the inner diameter direction may be formed, and the upper surface of the protrusion may be used as the abutting surface.

In the above embodiment, the axis P1 of the stud 6 and the axis P2 of the bolt hole 7 are arranged in the same direction, but the present invention is not limited to this. For example, as shown in FIG. 4, a bolt hole 7 is formed in a direction perpendicular to the axis with respect to the stud 6,
The through hole 9 may be formed from the lateral direction toward the bolt hole 7 and the bolt 10 may be designed to be fastened from the lateral direction.
Although FIG. 4 illustrates the case where the head of the bolt 10 is positioned inward in the vehicle width direction, the bolt 10 is positioned in the vehicle front-rear direction.
May be arranged. At this time, the bolt hole 7 may be formed so as to penetrate the stud 6.

In the above embodiment, the mounting structure of the ball joint for connecting the lower link 1 as the suspension link and the knuckle spindle 2 has been described. However, the mounting structure of the ball joint for connecting the upper link and the knuckle spindle 2 Is also applicable. Further, the present invention is also applicable to a mounting structure of a ball joint that connects another suspension link to a vehicle body-side member (a suspension member, a vehicle body frame, or the like).

In the above embodiment, the stud mounting portion is provided on the knuckle spindle 2 side. However, the mounting structure in which the stud mounting portion is provided on the lower link 1 side can be applied. .

[Brief description of the drawings]

FIG. 1 is a diagram showing a mounting structure of a ball joint according to an embodiment of the present invention, as viewed from a vehicle front side.

FIG. 2 is a view showing a state in which a stud is positioned above a stud mounting portion according to mounting of a ball joint according to an embodiment of the present invention.

FIG. 3 is a view showing another mounting structure of the ball joint according to the embodiment of the present invention, as viewed from the front side of the vehicle.

FIG. 4 is a view showing another mounting structure of the ball joint according to the embodiment of the present invention, as viewed from the front side of the vehicle.

FIG. 5 is a diagram showing a conventional ball joint mounting structure as viewed from the front side of a vehicle.

FIG. 6 is a view for explaining a problem of a conventional ball joint mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower link (suspension link) 1A Wheel side end part 1a Mounting hole 2 Knuckle spindle (wheel supporting member, 1st member) 2A Stud mounting part 3 Socket member 3a Socket part 5 Spherical guide part 6 Stud 7 Bolt hole 8 Fitting Hole 8a Bottom surface (butting surface) 9 Through hole 10 Bolt 13 Drive shaft P1 Stud axis P2 Bolt hole axis

Claims (6)

[Claims] 1. A ball joint mounting structure for connecting a suspension link between a first member, which is one of a wheel support member and a vehicle body-side member, which rotatably supports a wheel, wherein A socket portion is provided on one of the member and the suspension link, and a spherical guide portion is rotatably fitted into the socket portion, and a stud projecting from the spherical guide portion is connected to the first member.
A mounting hole portion provided on the other member to fit the stud, a bolt hole provided on the stud, A through hole that is provided in another member and extends toward the bolt hole and opens to the fitting hole portion; and a bolt that screws into the bolt hole through the through hole and fastens the stud to the other member. A mounting structure for a ball joint, characterized in that: 2. The mounting structure for a ball joint according to claim 1, wherein the fitting hole has an abutting surface for contacting an end surface of the stud. 3. An outer peripheral surface of the stud has a taper having a small diameter on a tip end side, and a taper for engaging with an outer peripheral surface of the stud is also provided on an inner diameter surface of a fitting hole. The mounting structure of the ball joint according to claim 1 or 2. 4. A shaft of a bolt hole provided in the stud,
The ball joint mounting structure according to any one of claims 1 to 3, wherein the ball joint is set in the same direction or substantially the same direction as the axis of the stud, and is offset from the axis of the stud. 5. The ball joint mounting structure according to claim 4, wherein the through hole has a size that allows the bolt to be inserted with play. 6. The suspension link according to claim 1, wherein the suspension link is a lower link, the first member is a wheel support member, and the lower link is provided with a socket, and an opening of the socket is directed downward. The ball joint mounting structure according to any one of claims 1 to 5, wherein