JPH0141933Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is used for the suspension arm and the mounting part on the vehicle body side in the suspension of a vehicle, and is used for adjusting the wheel alignment of the first member. Equipped with an eccentric wheel that moves the shaft of the bolt in the radial direction by rotating the bolt that has the eccentric wheel engaged in the guide groove to adjust the mounting position of the second member into which the shaft is inserted. This invention relates to a mounting position adjustment mechanism using bolts.

[Prior art]

An example of a conventional mounting position adjustment mechanism using an eccentric bolt is a wheel alignment adjustment mechanism used for a vehicle suspension, which is disclosed in US Pat. No. 3,526,413.

The mounting position adjustment mechanism includes a shaft portion of a bolt with an eccentric ring passing through an elongated hole provided in the first member and a hole provided in the second member, and the eccentric ring being provided in the first member. It is engaged with the guide groove. And the first
The elongated holes and guide grooves provided in the member are formed such that the longitudinal direction of the elongated holes and the direction in which the guide grooves extend are perpendicular to each other.

Therefore, when the nut is loosened and the bolt with an eccentric ring is rotated by applying rotational force to the head with a spanner, etc., the eccentric ring of this bolt is engaged with the guide groove, and the shaft portion is engaged with the elongated hole. Since the movable direction is specified, the shaft portion moves in the longitudinal direction of the elongated hole in accordance with the amount of rotation of the eccentric wheel. As a result, the second member into which the shaft of the bolt is inserted moves together with the shaft, thereby making it possible to adjust the mounting position of the second member relative to the first member.

[Problem that the invention attempts to solve]

However, in such a conventional mounting position adjustment mechanism using a bolt with an eccentric ring, the bolt with an eccentric ring and the first member are configured to be movable relative to each other, and Since the structure was such that it could be installed regardless of the rotational position of the bolt with an eccentric ring, for example, even if no adjustment was required at the initial stage of installation, the distance between the bolt with an eccentric ring and the first member could be adjusted. Some kind of positioning is required, which poses the problem of poor workability during assembly or adjustment.

[Means for Solving the Problems] This invention was made by focusing on such conventional problems, and the shaft portion of the bolt having an eccentric ring is connected to a long hole provided in the first member. A guide groove is provided in the first member that penetrates through the hole provided in the second member and extends in a direction substantially perpendicular to the direction in which the elongated hole extends, and the eccentric wheel is engaged with the guide groove. , a mechanism for adjusting the attachment position of the second member to the first member by moving the shaft portion in the direction in which the elongated hole extends through the rotation of the eccentric wheel; Along with creating a gap,
It is an object of the present invention to solve the above-mentioned problems by providing a structure in which an engaging portion that engages with this notch is provided on the first member side.

[Effect]

Therefore, in cases where no adjustment is required, such as at the initial stage of installation, this invention proposes that the notch provided on the outer periphery of the eccentric ring of the bolt with an eccentric ring be inserted into the engaging portion provided on the first member side. The bolt with the eccentric ring can be positioned with respect to the first member only by the engagement.

〔Example〕

This invention will be explained below based on illustrated embodiments.

1 to 4 are diagrams showing an embodiment of this invention.

First, to explain the structure, 1 shown in Figs. 1, 2, and 4 is a bolt with an eccentric ring. It consists of an eccentric ring 3 and a shaft part 4 that is continuous with the bottom surface of the eccentric ring 3, and the head part 2 and the shaft part 4 are formed on the same axis O, and with respect to this axis O. The axes P of the eccentric wheels 3 are eccentric by a distance L and are parallel to each other. And eccentric wheel 3
A notch 5 is provided on the outer periphery of the shaft centering line P on the side opposite to the axis line O side, and extends in a direction perpendicular to the direction in which both the axis lines O and P are connected. A scale 2a for position adjustment is provided on the end surface on the head 2 side on the axis O side.

The eccentric bolt 1 has a suspension arm attached to the shaft portion 4 via a bushing, and a stopper plate 6 of a suspension member as a vehicle body side member, which is a specific example of the first member.
It is tightened by a nut 11 that passes through an elongated hole 7 provided in the arm bush 8 and a hole 9 of an arm bush 8, which is a specific example of the second member, and is screwed into a threaded portion 10 provided at the tip thereof. Fixed.

As shown in FIGS. 1 and 3, the stopper plate 6 has an elongated hole 7 provided in the center and guide pieces 12 and 1 formed on both sides of the elongated hole 7 in the direction X.
3, and an engagement piece 14 which is a joint formed on one side of the direction Y perpendicular to the direction X in which the elongated hole 7 extends, and these guide pieces 12, 13 and the engagement piece 14,
The guide pieces 12 and 13 are bent to stand up in the same direction, and the pair of guide pieces 12 and 13 form a guide groove 15. During assembly, the eccentric wheel 3 is engaged with the guide groove 15, and the entire surface of the notch 5 of the eccentric wheel 3 is covered with the engaging piece 14.
installed facing the inner surface of the

The stopper plate 6 is fixed, for example, to a suspension member 16 of a vehicle, and the arm bush 8 is fixed, for example, to a suspension arm (not shown), thereby forming a semi-trailing arm independent suspension.

Note that 14a in the figure is an index provided corresponding to the scale 2a.

Next, the effect will be explained.

During factory assembly, the stopper plate 6 is fixed to the suspension member 15 in advance and set in a predetermined positional relationship. Therefore, the shaft part 2 of the bolt 1 with an eccentric ring is inserted into the long hole 7 of the stopper plate 6 and the hole 9 of the arm bush 8, and the notch 5 provided in the eccentric ring 3 of this bolt 1 is inserted into the engagement piece 14. When the eccentric wheel 3 is inserted into the guide groove 15 so as to face each other (the state shown in FIG. 1), the mounting position of the arm bush 8 with respect to the suspension member 16 including the stopper plate 6 is moved to a predetermined position. It is inevitably set at the mounting position. Furthermore, the positioning can be performed without adjustment by simply making the notch 5 face the engaging piece 14, so that the operator does not have to position the eccentric bolt and the stopper plate as in the conventional case. This is not necessary, and work efficiency during assembly can be greatly improved. moreover,
Since the engaging piece 14 also serves as a rotation stopper, it becomes easier to tighten the nut 11, and the workability of assembly can be further improved.

After that, when it becomes necessary to adjust the mounting position of the arm bush 8 at a small factory due to a change in the suspension characteristics due to changes over time in the elastic properties of the rubber-like elastic body used in the arm bush 8, for example. When you want to change the suspension characteristics, first loosen the nut 11 and pull out the bolt 1 with the eccentric wheel until the eccentric wheel 3 can avoid the guide pieces 12, 13 and the engagement piece 14. Next, as shown in FIG. 4, the bolt 1 is turned 180 degrees and pushed in again to engage the eccentric wheel 3 with the guide groove 15, and then the nut 11 is loosely tightened.

From this state, when the head 2 of the bolt 1 is rotated using a wrench or the like, the locking state of the engagement piece 14 that engages with the notch 5 is released by releasing the locking state, but the locking state is released. Since the eccentric ring 3 remains locked by the guide groove 15 of the plate 6, the bolt 1 can rotate within the guide groove 15. In this case, apart from the guide groove 15 with which the eccentric wheel 3 engages, the shaft portion 4 engages with the elongated hole 7 extending in the direction X perpendicular to the direction Y in which the guide groove 15 extends. The rotational movement is restricted by the guide groove 15 and the elongated hole 7. Therefore, the axis O of the shaft portion 4, which is displaced by the eccentric amount L with respect to the axis P of the eccentric ring 3, is limited by the elongated hole 7. is displaced in the extending direction X according to the amount of rotation.

As a result, the arm bush 8 fitted onto the shaft portion 4
The mounting positions of the two will move in the same direction, and the mounting positions can be adjusted in this way.

In the above embodiment, the engaging portion is provided on the stopper plate 6, but the engaging portion may be provided directly on the suspension member. Further, the eccentric ring 3 may be formed separately from the bolt body, and these may be fixed by fitting to prevent rotation.

[Effect of idea]

As explained above, in this idea, the first
A bolt with an eccentric ring, the shaft of which passes through an elongated hole provided in the first member and a hole provided in the second member, and an eccentric ring engages with a guide groove extending in a direction substantially perpendicular to the direction in which the elongated hole extends. A notch is provided on the outer periphery of the eccentric ring, and an engaging portion that engages with the notch is provided on the first member side. Therefore, in the early stages of assembly, simply inserting the eccentric bolt with the notch of the eccentric facing the engagement part provided on the first member side inevitably requires no adjustment in the positioning of the eccentric bolt. It can be done with Furthermore, since the engaging portion serves to prevent the eccentric bolt from rotating, the tightening work efficiency is also improved. Therefore, it is possible to significantly improve the workability during assembly of the mounting position adjustment mechanism using the eccentric bolt.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of this invention, Fig. 2 is a partially sectional side view, Fig. 3 is a front view of the stopper plate according to this invention, and Fig. 4 is when adjusting the mounting position. FIG. 1... Bolt with eccentric ring, 2... Head, 3... Eccentric ring, 4... Shaft, 5... Notch, 6... Stopper plate (first member), 7... Oblong hole , 8...
Arm bush (second member), 12, 13...Guide piece, 14...Engagement piece (engagement part), 15...Guide groove, O, P...Axis center line, L...Eccentricity amount.

Claims (1)

[Scope of utility model registration request] A shaft portion of a bolt having an eccentric ring is passed through an elongated hole provided in the first member and a hole provided in the second member,
A guide groove extending in a direction substantially perpendicular to the direction in which the elongated hole extends is provided in the first member, and the eccentric wheel is engaged with the guide groove, and rotation of the eccentric wheel causes the shaft portion to extend the length. In the mechanism for adjusting the attachment position of the second member to the first member by moving in the direction in which the hole extends, a notch is provided on the outer periphery of the eccentric ring, and an engagement member that engages with the notch. A mounting position adjustment mechanism using a bolt with an eccentric ring, characterized in that a portion is provided on the first member side.