JPH07269532A - Mounting device for stationary shaft - Google Patents

Abstract

PURPOSE:To provide the mounting device for a stationary shaft, which can surely support a stationary shaft by a center impeller type structure without performing simultaneous working low in working efficiency. CONSTITUTION:A stationary shaft 3 the base end of which is positioned so as to be fitted in one structural member 1 out of paired opposite structural members 1 and 7, is fastened so as to be fixed on the structural member 1 by a main bolt 5. An adapter 9 fitted in the tip end of the stationary shaft 3 is piled up over the other structural member 7 in such a way as to be freely slidable. Fixedly fastening the adapter 9 to the other structural member 7 by auxiliary bolts 10 enables the stationary shaft 3 to be surely supported by a center impeller type structure high in support stiffness without performing simultaneous working low in working efficiency, and concurrently the detachable installation of the main bolt 5 and the auxiliary bolts 10 permits the stationary shaft 3 to be easily mounted/demounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed shaft mounting device, and more particularly to a device for removably mounting a fixed shaft between a pair of opposed structures.

[0002]

2. Description of the Related Art When mounting a fixed shaft for supporting an idle gear or an idle pulley, conventionally, for example, as shown in FIG.
It was sometimes tightened and fixed. D is an idle gear attached to the fixed shaft A via a bearing E, F and G are thrust plates, and a fitting portion H provided at the base end of the fixed shaft A is provided in a structure C in a fitting hole I. To secure the mounting accuracy of the shaft A. However, since the supporting rigidity cannot be obtained only by mounting the fixed shaft A in a cantilever state as described above, there is a problem that the load of the fixed shaft is limited.

Therefore, when support rigidity is required, for example, as shown in FIG. 3, a fitting hole K is provided in the structure J facing the structure C, and a fitting portion provided at the tip of the fixed shaft A. If L is fitted into the fitting hole K and is supported on both sides, the bending of the fixed shaft A can be prevented. However, in this case, since it is necessary to secure the positional accuracy of both holes H and L by co-machining both fitting holes H and L in a state where both structures C and J are assembled in advance, processing efficiency is improved. There was a problem that was low.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a fixed shaft mounting device capable of reliably supporting a fixed shaft with a double-sided structure without performing co-processing with low processing efficiency. The challenge is to provide.

[0005]

In order to solve the above-mentioned problems, the present invention mainly provides a fixed shaft having a base end positioned and fitted to one of a pair of structures facing each other. After tightening with a bolt, the adapter fitted to the tip of the fixed shaft is slidably superposed on the other structure, and then the adapter is tightened and fixed to the other structure with an auxiliary bolt. Is characterized by.

[0006]

The adapter fitted to the tip of the fixed shaft which is positioned on one structure and fixed by tightening the main bolt is fixed on the other structure by the auxiliary bolt. Therefore, the fixed shaft is supported in a so-called both-supported state at the base end portion and the tip end portion, and the support rigidity is increased.

Further, since the adapter fitted to the tip of the fixed shaft is slidably superposed on the other structure, and both are tightened and fixed by the auxiliary bolt, the position of the fixed shaft is fixed. The fixing position of the adapter with respect to the structure may be adjusted correspondingly. For this reason, there is no need to perform the co-machining to secure the accuracy of the hole position as in the conventional case.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fixed shaft mounting device according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view in which a fixed shaft mounting device according to the present invention is applied to an idle gear shaft of an engine, and a fitting hole 2 is formed on a surface of a cylinder block 1 of an engine that functions as one of the opposing structures.
Is provided.

A fitting portion 4 which fits into the fitting hole 2 is provided at the base end of the fixed shaft 3, and the fitting portion 4 is fitted into the fitting hole 2 and fixed to the cylinder block 1. The shaft 3 is positioned and fitted. Further, the fixed shaft 3 is a hollow shaft, and the tip of the main bolt 5 inserted into the fixed shaft 3 is screwed into the screw hole 6 of the cylinder block 1 so that the fixed shaft 3 is cantilevered in the cylinder block 1. It is fixed by tightening.

On the other hand, the cover 7 functioning as the other structure facing each other is tightened and fixed to the cylinder block 1 with a bolt (not shown) to form a space for mounting a gear on the surface of the cylinder block 1. Then, the tip of the fixed shaft 3 is exposed to the outside of the cover 7 through a window hole 8 provided in the cover 7, and an adapter 9 that covers the window hole 8 is slidably overlapped with the outer surface of the cover 7 to assist both. It is fastened with bolts 10.

Further, a protrusion 11 provided on the inner surface of the adapter 9
Is inserted into the fitting hole 12 at the tip of the fixed shaft 3 to positionally connect the tip of the fixed shaft 3 to the cover 7 via the adapter 9. A gap 13 is secured between the window hole 8 provided in the cover 7 and the outer peripheral surface of the tip portion of the fixed shaft 3, and a bolt hole 14 having a larger diameter than the outer diameter of the auxiliary bolt 10 is formed in the adapter 9 to cover the cover 9. 7
The mounting position of the adapter 9 with respect to is adjustable.

Reference numeral 15 is a thrust plate sandwiched between the cylinder block 1 and the fixed shaft 3, and 16 is a thrust receiving flange provided on the outer peripheral surface of the tip end of the fixed shaft 3. In addition, the idle gear 1 is mounted on the fixed shaft 3 via the bearing 17.
8, the idle gear 18 is engaged with a drive-side gear 19 and a driven-side gear (not shown) so that the rotation of the drive-side gear 19 is transmitted to the driven-side gear.

In the fixed shaft mounting device constructed as described above, the fixed shaft 3 is mounted because the base end of the fixed shaft 3 is positioned on the cylinder block 1 and fastened by the main bolt 5. Position accuracy is ensured. Further, the adapter 9 fitted to the tip of the fixed shaft 3 which is clamped and fixed to the cylinder block 1 in this manner is clamped and fixed to the cover 7 by the auxiliary bolt 10.

Therefore, the fixed shaft 3 is supported in a so-called both-supported state at the base end portion and the tip end portion, and the support rigidity is increased. Further, the adapter 9 fitted to the tip of the fixed shaft 3 is slidably superposed on the cover 7, and both are fastened and fixed by the auxiliary bolt 10.

Therefore, even when the cylinder block 1 and the cover 7 are assembled with low accuracy, the accuracy of the mounting position of the fixed shaft 3 can be improved by adjusting the fixed position of the adapter 9 in accordance with the position of the fixed shaft 3. Since the height can be increased, it is not necessary to perform the co-processing to secure the mounting accuracy as in the conventional case.

The adapter 9 can be removed by removing the auxiliary bolt 10, and the main bolt 5 can be removed.
Since the fixed shaft 3 can be easily removed by removing, the attaching / detaching workability of the fixed shaft 3 does not deteriorate despite the double-support structure having high support rigidity.

In the above embodiment, the present invention is applied to the attachment device of the idle gear shaft of the engine, but any attachment device of a fixed shaft that supports a high-load rotating body may be used. Instead of the idle gear, the idle pulley The present invention can also be applied to a fixed shaft for attaching such as.

[0018]

As is apparent from the above description, according to the fixed shaft mounting device of the present invention, the fixed shaft is securely supported by the double-supported structure having a high supporting rigidity without performing co-processing with low processing efficiency. Can be made. Further, since the fixed shaft can be easily attached / detached by attaching / detaching the main bolt and the auxiliary bolt, the workability of attaching / detaching the fixed shaft does not deteriorate despite the double-supported structure having high support rigidity.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in which a fixed shaft attachment device according to the present invention is applied to an idle gear shaft of an engine.

FIG. 2 is a cross-sectional view showing an example of a conventional fixed shaft attachment device.

FIG. 3 is a cross-sectional view showing another example of a conventional fixed shaft attachment device.

[Explanation of symbols]

 1 Structure (cylinder block) 2 Fitting hole 3 Fixed shaft 4 Fitting part 5 Main bolt 7 Other structure (cover) 8 Window hole 9 Adapter 10 Auxiliary bolt 11 Projection part 12 Fitting hole 13 Gap 14 Bolt Hole 15 Thrust plate 16 Flange 17 Bearing 18 Idle gear 19 Gear on drive side

Claims (1)

[Claims] 1. A mounting device for removably mounting a fixed shaft between a pair of opposing structures, the fixed shaft having a base end positioned and fitted to one structure, and the fixed shaft. A main bolt for tightening and fixing to the structure, an adapter that fits on the tip of the fixed shaft and slideably overlaps with the other structure, and an auxiliary bolt for tightening and fixing the adapter to the other structure. A fixed shaft mounting device comprising.