JPS6014009Y2 - Shaft support device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a support device that restricts the axial movement of a shaft.

In general, there are various types of shaft support devices that prevent the shaft from falling out of the bearing or restrict sliding in the axial direction. remote control 2
For items that do not receive much load, such as the shaft 3 in the section, consideration is usually given to improving workability in assembly and processing in relation to the surrounding structure rather than strength. It is.

An example of a support device for the inner shaft 3 built into the remote control 2 is shown in FIG. 2.

A bearing hole 4B for the inner shaft 3 is provided so as to pass through an end portion 4A of a remote control cover 4 installed on the upper part of the transmission 1.

The inner shaft 3 has a C-shaped retaining ring 5 and an O to prevent oil leakage.
Circumferential groove 5A for attaching ring 6.

6A is machined.

Then, attach the O-ring 6 to this inner shaft 3, insert it into the bearing hole 4B so that the shaft end 3A protrudes from the remote control cover 4, fit the spacer 7, and then use the C-shaped retaining ring 5 for positioning and removal. Make a stop.

However, when stopping the shaft with the C-shaped retaining ring 5,
It is normal to have some play between the C-shaped retaining ring 5 and the spacer 7, and furthermore, the movement of the shaft can only be restricted in one direction.

Furthermore, when disassembling and reassembling, the C-shaped retaining ring 5 is often deformed, so it is often impossible to reuse it.

FIG. 3 shows another conventional example of the support device for the inner shaft 3, in which a pin 8 is drilled from the bottom of the remote control cover 4 to penetrate the center of the bearing hole 4B and stand on the opposite side of the bearing hole 4B. A pin insertion hole 4C and a pin hole 4D are provided.

In the inner shaft 3, a circumferential groove 9A having the same width as the pin 8 is installed near the shaft end 3A, and also a circumferential groove 9A having the same width as the pin 8 is installed from the shaft end 3A to be orthogonal to this circumferential groove 9A. A vertical axis 9B is provided.

When inserting the inner shaft 3 into the bearing hole 4B, first insert the pin 8 through the pin insertion hole 4C on the bottom of the remote control cover 4, and then insert the pin 8 and the inner shaft
While inserting the longitudinal groove i9B as a guide, insert the circumferential groove 9A.
At this point, rotate the inner shaft 3 to position it.

Oil leakage is prevented by plugging the bearing hole 4B from the outside of the remote control cover 4 with a plug 10.

In this way, when using the positioning pin 8,
This has the advantage of reducing the number of parts and improving positioning accuracy, but the pin insertion hole 4 on the bottom of the remote control cover 4
From C, it is difficult work to set the short pin 8 in the pin hole 4D on the opposite side of the bearing hole 4B, and furthermore, there is a price process for machining the vertical groove 9B of the inner shaft 3, so there is no loss in assembly. The disadvantage is that the number of processing steps increases and the cost increases.

Therefore, from this point of view, the present invention uses a pin with a small number of parts and high positioning accuracy, and has a structure that makes assembly easy and eliminates the relatively expensive milling process, thereby reducing costs. The purpose is to measure.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 5, a bearing hole 4B is provided so as to pass through the end portion 4A of the remote control cover 4.

A circumferential groove 9A having approximately the same width as the outer diameter of the pin 8 is provided on the outer circumference near the shaft end 3A of the inner shaft 3, and then the inner shaft, which is slightly larger than the outer diameter of the pin 8, passes through the circumferential groove 9A. A through hole 9C passing through the center is made to penetrate.

A pin insertion hole 4C is made to pass through the bottom surface of the remote control cover 4 by drilling, and a pin hole 4D in which the pin 8 is erected is provided at the same time by passing it through to the opposite side of the bearing hole 4B.

Then, insert the inner shaft 3 into the bearing hole 4B, align the center lines of the waist through hole 9C and the pin insertion hole 4C, and insert the pin (or ball) 8 into the inner shaft from the pin insertion hole 4C on the bottom of the remote control cover 4. Using the through hole 9C of the shaft 3 as a guide, drop it and stand it in the bottle hole 4D.

After that, rotate the inner shaft 3 some and pin 8
Support it so that it does not fall out.

Like this, the pin insertion hole 4C, bottle hole 4D, and through hole 9C are on the same line, so the pin 8 can be easily erected by simply dropping it from above, making assembly work easier. , the number of processing steps can be reduced and costs can be reduced.

As explained above, in this invention, the bearing hole is provided with a pin insertion hole and a pin hole, and the inner shaft is provided with a circumferential groove and a through hole that serves as a guide for the pin, making assembly easy. At the same time, the number of processing steps can be reduced, leading to cost reduction.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the external shape of the remote control, Fig. 2 is a sectional view of a conventional device, Fig. 3 is a sectional view of another conventional device, and Fig. 4 is a cross-sectional view of the inner shaft of Fig. 3. FIG. 5 is a sectional view showing an embodiment of the present invention, and FIG. 6 is a side view showing an embodiment of the present invention. 3...Inner shaft, 3A...Shaft end, 4...Remote control cover, 4A...
End, 4B...Bearing hole, 4C...Zen charging hole, 4D...In hole, 8...Pin, 9
A: Circumferential groove, 9C: Through hole, 1°: Plug.

Claims (1)

[Scope of utility model registration request] A pin insertion hole and a pin hole are provided perpendicularly to the bearing hole of the shaft provided in the bearing, and a circumferential groove and a through hole passing through the circumferential groove are penetrated and shaped in the shaft, and the bearing A shaft support device characterized in that a pin or ball for positioning the shaft inserted into the hole is dropped from the pin insertion hole into the pin hole using the through hole as a guide.