JPH0311443Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an expansion staggered sleeve that fastens a member to be fastened by being used in combination with a fastening bolt.

For example, when tightening two fastened members using a plurality of fastening bolts, if the bolt mounting holes of the two fastened members are machined separately for each fastened member, bolt installation will be difficult during assembly. A slight error may occur in the pitch of the holes, and the tightening bolt may not fit into the bolt mounting hole, or a positional shift may occur between the two members to be fastened.

SUMMARY OF THE INVENTION The object of the present invention is to provide an expansion staggered sleeve that can be used in combination with a fastening bolt to overcome the above-mentioned drawbacks.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

In FIG. 1, a thin cylindrical sleeve 1 is made of metal, for example, and has a flange 1a formed at its upper end. One location of the cylindrical sleeve 1 is cut away in the direction of the axis 2 and obliquely relative to this axis. One side edge 1b and the other side edge 1c that are separated from each other are in contact with each other.

The sleeve end surface portion 1d forming an acute angle with respect to one side edge 1b and the sleeve end surface portion 1e forming an obtuse angle with respect to the other side edge 1c are elastically offset from each other in the direction of the axis 2. . Similarly, the lower end sides of the separated cylindrical sleeves 1 are also made to be different from each other.

The outer peripheral part 3 of the staggered sleeve 1 constructed in this way is fitted into the mounting holes of the pair of fixing members 5 and 6, as shown in FIG. Insert.

In this state, when the nut 8 is tightened as shown in the figure, the staggered sleeve 1 is compressed in the axis 2 direction. expands in the radial direction.

Here, in FIG. 2, if the mounting holes of the fastened member 5 and the other fastened member 6 are machined separately, and these mounting holes are misaligned, this mounting hole will not be directly connected to the fastened member 5. When fitting a tightening bolt, the bolt may not fit into the mounting hole depending on the amount of deviation. Furthermore, if the bolt is forced into place, there is a risk that the two fastened members 5 and 6 will be misaligned.

Therefore, in order to allow for the positional deviation of the mounting hole, the mounting hole is made larger and relatively rough, and the above-mentioned staggered sleeve 1 is fitted into such a mounting hole and tightened with the nut 8. If this is done, the sleeve 1 will be expanded, and at this time, the sleeve 1 will be firmly crimped into the mounting hole.

That is, by using such staggered sleeves, there is no risk of misalignment between the fastened members 5 and 6, and the fastening bolt 7 can also be fitted smoothly and easily.

In this embodiment, the staggered sleeve is provided with a flange as shown by reference numeral 1a, so that it can also function as a washer. However, such a flange is not necessarily necessary, and the basic functions described above can be achieved even without such a flange.

FIG. 3 shows an example of a fastening method that does not use the nut 8 shown in FIG.
It is designed to be screwed onto another member 9 to be fastened. Even in such a method, the members to be fastened 5,
6 and the member to be fastened 9 can be prevented from shifting relative to each other.

In addition, in the example shown in FIGS. 2 and 3,
Now, if we were to use a system in which the fastening bolts 7 directly fasten the fastened members without using the staggered sleeve 1, if the tightening torque of the fastening bolts fluctuates, each fastened member would be tightened according to this fluctuation. The amount of displacement of the fastening member will change. However, when this staggered sleeve is used, even if the tightening torque fluctuates, it is possible to constantly align the fastened members regardless of this. Regarding the staggered sleeve shown in Fig. 1, before use, the both end edges 1b and 1c are kept separated from each other, and the sleeve is fitted into the mounting hole of the member to be fastened. In this case, the sleeve may be configured such that both side edges touch each other.

FIG. 4 shows an example of a structure in which the fastening method using staggered sleeves of the present invention can be adopted, and is a structural example for fastening a trunnion base 10 and a side rail 11 of a large vehicle or the like.

In this example, if the mounting hole portions of the side rail 11 and the trunnion base 10 are processed separately, as indicated by symbol A, the mounting holes may be misaligned. In such a case, the mounting hole should be machined into a larger hole that can tolerate the misalignment, and the staggered sleeve should be installed in this hole and tightened as shown in Figure 2. If the side rail 11 and the trunnion base 10 are fastened in this manner, no misalignment occurs between them, and the fastening bolt can be easily inserted.

As described above, according to the present invention, it is possible to avoid misalignment of the members to be fastened with each other, and the fastening can be performed extremely easily.

[Brief explanation of the drawing]

FIG. 1 shows the constituent fibers of the expansion staggered sleeve according to an embodiment of the present invention, and FIGS. 2 and 3 are diagrams each showing the manner in which the expansion staggered sleeve is used in each example.
FIG. 4 is a partial cross-sectional configuration diagram of a trunnion base structure of a large vehicle to which the fastening method using the expansion staggered sleeves described above can be adopted. 1... Expansion offset sleeve, 2... Axis line, 1
b, 1c... side edge, 3... outer peripheral surface, 4... inner peripheral surface, 5, 6, 9... member to be fastened, 7... tightening bolt.

Claims (1)

[Scope of Claim for Utility Model Registration] A cylindrical sleeve that is inserted into a bolt mounting hole of a fastened member and positions the fastened member by tightening a tightening bolt that is inserted inward, the sleeve One point on the circumference is separated in the axial direction and at an angle to the axis, and one side end surface and the other side end surface of the separated circumferential surface are formed so as to be offset from each other while being in elastic contact with each other. and an expansion staggered sleeve configured such that when the tightening bolt is tightened, the circumferential surface of the sleeve expands in the radial direction and is crimped onto the inner circumferential surface of the bolt mounting hole.