JPH0637936B2 - Boot fixing structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot fixing structure, and more particularly to a tapered taper formed at a tip end portion of a shaft main body on an open end side of an elastically deformable elastic boot. The present invention relates to a boot fixing structure in which a portion is inserted and fixed.

(Prior Art) In the conventional boot fixing structure, the tip of the shaft body is inserted into the open end side of the boot, and then the coupling band is fixed while being reduced in diameter.

(Problems to be Solved by the Invention) According to such a conventional boot fixing structure, the shaft and the boot can be fixed, but it is difficult to quickly fix the shaft and the boot.

For this reason, the conventional boot fixing structure cannot be adopted in the current various machine assembly processes in which simplification and speedup are strongly required.

Therefore, an object of the present invention is to propose a boot fixing structure capable of quickly fixing the shaft and the boot.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present inventor has reached the present invention as a result of studying that a boot fixing structure capable of fixing the shaft and the boot with one touch is advantageous. .

That is, a first aspect of the present invention is a boot fixing structure in which a tapered taper portion formed at a tip end portion of a shaft body is inserted and fixed to an opening end side of an elastically deformable elastic boot. On the side, the outer peripheral surface in the vicinity of the boundary with the tapered portion is provided with a recessed groove, and a notch groove extending in the axial direction of the shaft and reaching the recessed groove is provided on the peripheral surface of the tapered portion. On the other hand, on the inner wall surface on the opening end side of the elastic boot, it is possible to tightly fit with a concave groove provided around the shaft body, and when the tapered portion is inserted into the elastic boot, the tapered portion is formed. A coupling band, which has a convex portion that is guided by the cutout groove and is introduced into the concave groove, is formed on the outer wall surface of the elastic boot corresponding to the convex portion, and the diameter of which is previously reduced to a predetermined diameter. Fixed boots that are characterized by There is an elephant.

A second aspect of the present invention is a boot fixing structure in which a tapered taper portion formed at a distal end portion of a shaft body is inserted and fixed to an opening end side of an elastically deformable elastic boot. On the side, the outer peripheral surface in the vicinity of the boundary with the tapered portion is provided with a protruding portion, and on the other hand, on the inner wall surface of the elastic boot on the open end side, the protruding portion provided with the protruding portion on the shaft body is closely packed. A concave groove that can be fitted is provided around the convex portion of the shaft main body when the tapered portion is inserted into the elastic boot across the opening end of the elastic boot and the concave groove. A notched groove is formed, and at least on the outer wall surface of the elastic boot on the opening end side of the concave groove,
The boot fixing structure is also characterized in that a coupling ring having a diameter reduced in advance is mounted.

(Operation) As in the boot fixing structure according to the first aspect of the present invention, the convex portion formed on the inner wall surface of the elastic boot on the open end side is applied to the taper portion formed at the distal end portion of the shaft main body to move the shaft. When the tapered portion of the main body is inserted into the elastic boot, the convex portion of the elastic boot is guided by the notch groove provided in the tapered portion and introduced into the concave groove of the shaft main body to be tightly fitted.

Alternatively, as in the boot fixing structure according to the second aspect of the present invention, the convex portion formed on the shaft body side is brought into contact with the notch groove formed on the inner wall surface of the elastic boot on the open end side, and When the tapered portion is inserted into the elastic boot, the convex portion on the shaft body side passes through the notch groove of the elastic boot and is tightly fitted into the concave groove formed on the inner wall surface of the elastic boot.

After that, in any of the boot fixing structures, the elastic boot is sufficiently detented with the shaft body by rotating the elastic boot by a predetermined angle. It can be done with one touch without performing the fastening work.

Further, since the convex portion of the elastic boot is introduced into the concave groove of the shaft body and tightly fitted thereto, a sealing effect can be exhibited together.

(Example) The present invention will be described in more detail with reference to the drawings.

In FIG. 1, a tapered portion 12 is formed at the right end side tip portion of a shaft body 10 that extends horizontally in the left-right direction and that gradually decreases in diameter in the tip direction.

The left end position of the tapered portion 12, that is, the shaft body 1
On the outer peripheral surface on the 0 side and near the boundary with the tapered portion 12, there is formed a groove 14 which is slightly wider than the depth.

Further, as shown in FIG. 3, a notch groove 16 that extends in the axial direction of the shaft and that communicates with the concave groove 14 has a tapered portion 12.
Four pieces are cut in positions that evenly divide the peripheral surface of the.

On the other hand, the elastic boot 18 into which the taper portion 12 formed at the tip of the shaft body 10 is inserted is a flexible and elastic boot having a tubular shape extending horizontally to the right of the taper portion 12. Form the body. The left end open end side 20 of the tubular body is formed with an outer diameter of the shaft main body 10 and an inner diameter that is an interference fit, and projections 22 are provided around the intermittently.

The convex portion 22 is formed at a position corresponding to the cutout groove 16 formed in the taper portion 12, and its cross-sectional shape is closely fitted by engaging with the concave groove 14 formed in the shaft body 10. In addition to being formed in a shape, its side surface shape is also formed to be able to pass through the cutout groove 16 of the tapered portion 12.

Further, in this embodiment, a shallow groove 24 is formed on the outer peripheral surface of the elastic boot 18 at a position corresponding to the convex portion 22 formed on the inner wall surface of the elastic boot 18, and the ring-shaped coupling band 26 is fixed. Has been done.

Before the shaft is attached to the elastic boot 18, the ring-shaped coupling band 26 is fixed to the elastic boot 18 with a diameter reduced in advance to a tightening margin when the elastic boot 18 is fastened. As described above, by fixing the ring-shaped coupling band 26 to the elastic boot 18 in a reduced diameter state in advance, when the elastic boot 18 is attached to the shaft, the elastic boot 18 and the shaft main body 10 are not attached to each other, as will be described later. There is sufficient detent between them.

Since the ring-shaped coupling band 26 is worn when the elastic boot 18 has sufficient flexibility and elasticity, as long as the elastic boot 18 can be uniformly reduced in diameter, Not only joint type and joint type joint bands, but also perfect circular ring made by welding the end faces of steel strips to each other, steel pipe cutting perfect circular ring, hard engineering, etc. be able to.

Next, the procedure for mounting the elastic boot 18 on the shaft as shown in FIG. 2 using the boot fixing structure shown in FIG. 1 will be described.

First, the convex portion 22 formed on the inner wall surface of the elastic boot 18 on the open end side 20 is applied to the tapered portion 12 formed at the tip of the shaft body 10, and the tapered portion 12 of the shaft body 10 is inserted into the elastic boot 18. To do.

At that time, the convex portion 22 of the elastic boot 18 is
The left end surface 28 of the convex portion 22 is guided by the cutout groove 16 provided in the left inner wall surface 30 of the concave groove 14 of the shaft body 10.
Abut.

When the left end surface 28 of the convex portion 22 and the left inner wall surface 30 of the concave groove 14 are brought into contact with each other in this manner, the ring-shaped coupling band 26 having a reduced diameter is fixed to the outer peripheral surface corresponding to the convex portion 22. Therefore, the convex portion 22 is tightly fitted in the concave groove 14.

Then, the elastic boot 18 is rotated about 45 ° while rotating in the hour hand rotation direction or the counter hour hand rotation direction, whereby the elastic boot 18 and the shaft body 10 are sufficiently detented.

As described above, according to the boot fixing structure of the present embodiment, the shaft body 10 and the elastic boot 18 can be fixed with one touch without performing the fastening operation of the coupling band.

In addition, such mounting work can be performed without deforming the elastic boot 18, the time required for the work is only a few seconds, and it is possible to sufficiently cope with high-speed construction and flow work.

The taper portion 12 of the shaft body 10 is attached to the elastic boot 18 to which the ring-shaped coupling band 26 having a reduced diameter is fixed.
When inserting, the insertion of the tapered portion 12 becomes hard, but there is no influence on the time required for the insertion.

In the boot fixing structure shown in FIG. 1, the groove 14 is formed in the shaft body 10, but as shown in FIG. 4, even if the groove 32 is formed in the inner wall surface of the elastic boot 18 on the open end side. Good.

In this case, on the shaft body 10 side, the convex portions 22 are formed intermittently on the outer peripheral surface in the vicinity of the boundary with the tapered portion 12 formed at the tip portion of the shaft body 10,
A notched groove 16 through which each of the protrusions 22 can pass is formed between the open end of the elastic boot 18 and the recessed groove 32.

Further, a linear ring 36 as a coupling ring, which has a diameter reduced in advance to a predetermined diameter, is mounted on at least the outer wall surface of the elastic boot 18 on the opening end side of the groove 32.

In this embodiment, the ridge 34 is provided around the outer peripheral surface of the elastic boot 18 corresponding to the groove 32, and the ridge 3 is formed.
Wire rod rings 36, 36 are fixed to each of both end edges of the wire rod 4.

Using the boot fixing structure shown in FIG. 4 and attaching the elastic boot 18 to the shaft as shown in FIG.
Each of the protrusions 22 of the shaft body 10 is brought into contact with the notch groove 16 formed in the inner wall surface of the elastic boot 18 on the open end side, and the tapered portion 12 of the shaft body 10 is inserted into the elastic boot 18.

At this time, the convex portion 22 is formed in the cutout groove 16 of the elastic boot 18.
Groove 3 formed on the inner wall surface of the elastic boot 18 by passing through
2 is tightly fitted.

Then, by rotating the elastic boot 18 by a predetermined angle, the elastic boot 18 is detented between the elastic boot 18 and the shaft body 10. The detent is made more reliable because the inner diameter of the elastic boot 18, which is closer to the opening end than the concave groove 32, is reduced by mounting the wire rod 36, which has been previously reduced to a predetermined diameter. be able to.

Therefore, similarly to the boot fixing structure shown in FIG. 1, the shaft main body 10 and the elastic boot 18 can be fixed by one-touch without the need for fastening the coupling band.
In addition, since it is introduced into the convex groove 22 of the shaft body 10 and closely fitted in the concave groove 32 of the elastic boot 18, a sealing effect can also be exhibited.

In addition, when the groove 14 is provided around the shaft body 10, the width, depth, shape, etc. of the groove 14 are changed every ⅛ circumference so that the convex portion 22 that has passed through the notch groove 16 is The taper shape or the like can be processed in advance so that it becomes an interference fit as it rotates and serves as a detent.
As such an example, the right inner wall surface of the concave groove 14 may be formed in a curved shape or a sawtooth shape, or the concave groove 14 may be narrower than the lateral width of the convex portion 22.

(Effects of the Invention) According to the present invention, the shaft and the elastic boot can be fixed extremely quickly, and can be used in various machine assembly processes that operate at high speed.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing an embodiment of a boot fixing structure according to the present invention, and FIG. 2 is a partial sectional view showing a state in which a shaft and elastic boots are fixed by using the boot fixing structure shown in FIG. FIGS. 3 and 4 are side views of the tapered portion, FIG. 4 is a partial cross-sectional view showing another embodiment, and FIG. 5 is the boot fixing structure shown in FIG. Each of the partial cross-sectional views showing the state is shown. In the figure, 10 ... Shaft body, 12 ... Tapered portion, 14 ... Recessed groove, 16 ... Notched groove, 18 ... Elastic boot, 20 ... Open end side, 22 ... Convex portion, 26 ... Ring-shaped coupling band, 28 ... left end face, 30 ... right end face, 32 ... concave groove, 34 ... ridge, 36 ... linear ring.

Claims (2)

[Claims] 1. An elastically deformable elastic boot on the open end side,
In a boot fixing structure in which a tapered taper portion formed at a tip end portion of a shaft body is inserted and fixed, a concave groove is circumferentially provided on an outer peripheral surface of the shaft body side near a boundary with the taper portion. In addition, a cutout groove extending in the shaft axial direction and extending to the recessed groove is formed on the peripheral surface of the tapered portion, while the inner wall surface of the elastic boot on the open end side is provided around the shaft main body. It is possible to tightly fit with the recessed groove, and when the tapered portion is inserted into the elastic boot, a convex portion is formed which is guided by the notch groove provided in the tapered portion and is introduced into the concave groove, A boot fixing structure characterized in that a coupling band having a diameter reduced in advance is attached to an outer wall surface of the elastic boot corresponding to the convex portion. 2. An elastic boot that is elastically deformable is provided on the open end side.
In a boot fixing structure in which a tapered taper portion formed at the tip of the shaft body is inserted and fixed, a protrusion is provided on the outer peripheral surface of the shaft body side near the boundary with the taper portion. On the other hand, on the inner wall surface on the opening end side of the elastic boot, there are provided a convex groove protrudingly provided on the shaft body and a concave groove capable of tight fitting, and the opening end and the concave groove of the elastic boot are formed. A notch groove through which the convex portion of the shaft main body can pass when the taper portion is inserted into the elastic boot, and at least the opening end side of the concave groove of the elastic boot. A boot fixing structure characterized in that a coupling ring whose diameter has been reduced in advance is attached to an outer wall surface.