JPH02227310A - Length adjuster for suspension link - Google Patents

Abstract

PURPOSE:To aim at structural simplification, manufacturing easiness and strength improvement by attaching a spacer, providing a clearance between a bolt and link supporting the link pivotally on a body frame, to this link, and making the bolt lockable to an optional position of this clearance part, in the suspension link for automobiles. CONSTITUTION:A link 4 is locked to a bush 1 in the state that each thread part tip of adjusting bolts 23, 24 comes into contact with a side face of the bush 1. When length of the link 4 is adjusted, for example, when it is lengthened, the adjusting bolt 24 is separated from a spacer 2 as long as the specified value, moving the link 4 to the side of the adjusting bolt 23, and the bush 1 is made recontact with the tip of the adjusting bolt 24. Next, the adjusting bolt 23 is screwed forward till its tip comes into contact with the bush 1 and thereby the link 4 is locked again. With this constitution, strength can be improved despite simple in structure.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a length adjusting device for a suspension link that suspends a tire on a frame of an automobile so that it can move vertically.

<Prior Art> As shown in FIG. 6, an automobile suspension (suspension system) uses suspension links 7 to
1 is suspended on the frame 72 of an automobile so that it can move up and down.

This suspension carries the weight of the vehicle, absorbs vibrations and shocks received from the road surface, improves riding comfort, and has the function of ensuring steering performance, which is essential to the handling stability of the vehicle.

Therefore, various suspension alignment adjustment mechanisms have been developed in order to fully utilize such functions.

Conventionally, as this alignment adjustment mechanism, a length adjustment device for a link 7 as shown in FIG. 7 has been adopted.

The conventional device has a structure in which the link 7 is cut in the middle and the cut portion is connected by a connecting member 8 so that the length can be changed.

This connecting member 8 is a rod-shaped body with reverse threads carved on both ends as shown in FIG.
is attached and fitted into a screw hole made in the cut surface of the link 7.

The length of the link 7 is adjusted by rotating the connecting member 8 to move the link 7 closer to or away from each other and fixing it at a predetermined length with a nut 81.

<Object of the present invention> The present invention was made to solve the above-mentioned problems, and provides a suspension link length adjustment device that has a simple structure, can be manufactured at low cost, and can ensure sufficient strength. The purpose is to provide

<Problems to be Solved by the Present Invention> The conventional link length adjustment techniques described above have the following problems.

<A> Since the structure is such that the link 7 is cut in the middle and the cut portion is connected by the connecting member 8, the integrity of the link 7 is impaired and the strength of the link 7 is reduced.

Therefore, it is difficult to ensure the strength of the link 7 against road surface interference and the like.

<Mouth> The cost will be high as it will be necessary to make significant modifications to the links currently in use.

In addition, it is necessary to perform confirmation tests such as strength guarantee again.
It's complicated.

<Configuration of the Present Invention> An embodiment of the present invention will be described below with reference to the drawings.

<B> Bush (Fig. 3) The bush 1 has a hollow cylindrical inner collar 12 located in the center of an outer collar 11 that is a hollow box with both ends open, and an elastic member 13 made of rubber or the like is placed between them. It is welded.

The inner collar 12 has a length that slightly projects from both ends of the outer collar 11, and has a bolt hole 14 with a diameter slightly larger than the bolt 3 in the axial direction.

<Port> Spacer (Fig. 3) The spacer 2 is a hollow tube with both ends open, and may have a structure in which a short tube is pressed from above and below, as shown in Fig. 3, for example.

The height Ll of the hollow portion of this spacer 2 is slightly higher than the height of the bushing 1.

Further, the horizontal width L2 of the hollow portion of the spacer 2 is set so as to provide a predetermined gap 21 between the spacer 2 and the bush 1.

This gap 21 is set in advance so that a sufficient distance of movement of the link 4 can be ensured.

Further, bolt holes 22 are formed in the horizontal direction on both sides of the spacer 2, and screws are carved into the inner circumferential surface of the bolt holes 22.

Then, adjustment bolts 23 and 24 are fitted into both bolt holes 22.

This adjustment bolt 23, 24 has at least spacer 2
It is formed to be longer than the horizontal length of the gap 21.

<C> Link fulcrum part (FIG. 4) At the fulcrum part of one end of the link 4, a mounting window 41 for the spacer 2 is provided which penetrates in a direction orthogonal to the longitudinal direction of the link 4.

2) Assembling each member (Fig. 1.2) First, both ends of the spacer 2, to which the adjustment bolts 23 and 24 are attached, are fixed to the mounting window 41 of the link 4 by welding or adhesive.

Next, the bushing 1 is inserted into the hollow part of the spacer 2 so that the bolt hole 14 is perpendicular to the longitudinal direction of the link 4.

Then, the link 4 is positioned between the frames 5, and the bolt 3 is inserted from the bolt hole 51 of one frame 5, passed through the bolt hole 14 of the bushing 1, and protrudes from the bolt hole 51 of the opposite frame 5. and fix it with nut 31.

When the nut 31 is tightened, the inner collar 1 of the bush 1
Both ends of the frame 5 are pressed against the inner surface of the frame 5, and the fulcrum position is fixed.

Therefore, the elasticity of the elastic member 13 of the bush 1 allows the link 4 to rotate about the inner collar 12 as a fulcrum.

<Action of the present invention> The present invention will now be described in detail with reference to FIG. 1.2.

FIG. 2 shows a state in which the tips of the threaded portions of the adjustment bolts 23 and 24 are in contact with the side surface of the bushing 1.

In this state, the link 4 is attached to the adjustment bolt 23.24.
It is fixed to the bushing 1 via.

When increasing the length of the link 4, turn the adjustment bolt 24 so that it protrudes from the spacer 2 by a predetermined distance.

Then, a gap is created between the threaded end of the adjustment bolt 24 and the bush 1.

The link 4 is moved toward the adjustment bolt 23 (tire side) by the amount of the gap, and the bush 1 is brought into contact with the tip of the threaded portion of the adjustment bolt 24 again.

Next, the adjusting bolt 23 on the opposite side is inserted into the spacer 2, and the tip of the threaded portion is brought into contact with the bushing 1.

As a result, the link 4 is moved toward the tire, that is, the length of the link 4 becomes long, and the bush 1 is fixed again by the adjustment bolts 23 and 24.

On the other hand, if you want to shorten the length of link 4, use adjustment bolt 2.
3 to protrude from the spacer 2, and move the link 4 to the adjustment bolt 24 side.

Then, insert the adjustment bolt 24 into the spacer 2,
The bushing 1 can be fixed by sandwiching it from both sides.

<Other Examples> As another example, as shown in FIG.
A trapezoidal bushing 6 with tapered side surfaces is arranged around the bushing 6, and umbrella-shaped members 61 and 62 having tapered surfaces having complementary angles to the tapered surfaces of the bushing 6 are placed on both tapered surfaces of the bushing 6. A conceivable structure is that an adjustment bolt 64 that is movable in the vertical direction is attached to a frame 63 that is placed in contact with the bushes 6 and provided around the bush 6, and that the adjustment bolt 64 and the umbrella-shaped members 61, 62 are connected.

According to the device with this structure, if the umbrella-shaped member 61 on the opposite side is moved upward while the umbrella-shaped member 62 is positioned downward, the link 4 moves to the umbrella-shaped member 61 side (tire side). death,
The length of Leak 4 is long.

In order to shorten the length of the link 4, the umbrella-shaped member 62 on the opposite side may be moved upward while the umbrella-shaped member 61 is positioned downward.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<B> Conventional link length adjustment devices have a structure in which the link is cut in the middle and the cut portion is connected with a connecting member, which impairs the integrity of the link and reduces the strength of the link. It is difficult to ensure the strength of the link against road surface interference, etc.

In contrast, the device of the present invention has a structure in which a length adjustment device is attached to the fulcrum portion of the link end.

Therefore, the integrity of the link is not impaired.

Therefore, sufficient strength of the link against road surface interference etc. can be ensured.

<Exposure> Conventional equipment requires extensive processing on the links currently in use, which makes them expensive (and also requires re-confirmation tests to ensure strength, etc.), which is complicated.

However, the present invention has a simple structure in which a spacer to which an adjustment bolt is attached is attached around a fulcrum bolt that pivotally supports the link, and manufacturing costs can be reduced.

Furthermore, since there is no need to perform extensive processing on the link, there is no need to perform confirmation tests such as ensuring strength again.

<C> In the present invention, the length of the link can be adjusted simply by rotating the adjustment bolt, so anyone can easily perform the adjustment work.

[Brief explanation of the drawing]

Fig. 1 2 An explanatory diagram of an embodiment of the present invention Figure 2: Plane sectional view of the device of the present invention Figure 3: Exploded view of the device of the invention Figure 4; Explanatory diagram of the link fulcrum part Figure 5: Explanatory diagram of other embodiments Figure 6.7: Illustration of conventional technology

Claims (1)

[Claims] (1) In a suspension link that suspends a tire on a car frame so that it can move up and down, one end of the suspension link is attached to a bolt that pivotally supports the car frame and a link that maintains a gap between the bolt and the link. A length adjusting device for a suspension link, comprising: a spacer; and means for fixing a bolt to the link at an arbitrary position in the gap.