JP2000009110A - Shaft-fastening structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To materialize a shaft-fastening structure positively allowing separation form a shaft in removal even if a color body has plastic deformation or a screw part has deformation. SOLUTION: A recessed part 15 having two internal wall surfaces run in parallel with a slit 12 is formed on one side of a color body 10 disconnected through the slit 12. A loose hole 13 is formed between the slit 12 and the recessed part 15. A screw hole 14 is formed on the other side relative to the slit 12. A bolt 2 is inserted toward the loose hole 13 from the screw hole 14 side. A retaining ring groove is formed at the given position of the threads of the bolt 2. After inserting the bolt 2, a retaining ring 22 is placed in the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft fastening structure for attaching a collar or a part used in equipment to a rotary shaft or the like.

[0002]

2. Description of the Related Art Conventionally, an example of a shaft fastening structure which is attached to a rotary shaft or the like used in equipment will be described with reference to FIGS. FIG. 6 is a plan view showing the shaft fastening collar, FIG. 7 is a BB sectional view thereof, 1 is a substantially circular collar as viewed from the axial direction,
10 is a color body processed from steel, light metal, etc., 11 is a color 1
Shaft fastening hole corresponding to the inside diameter of the collar, 12 is a slit formed in one place in the collar body 10 in the radial direction, 13 is a slit
A `` loose hole '' formed at substantially the center of one side of the collar body 10 separated at 12 and perpendicular to the slit surface, 14 is a slit surface at the approximate center of the other side of the collar body 10 separated at the slit 12. Screw holes formed at right angles to the holes 2 are loose holes 13
And a bolt inserted into the screw hole 14.

[0003] That is, this shaft fastening collar is provided with a slit.
Slit of circular collar body 10 slightly open in 12 parts
Loose holes 13 (gap holes) and screw holes formed on both sides of 12
By inserting and tightening the bolt 2 from the loose hole 13 side to the screw hole 14 side, the slit 12 is drawn by the screw, the shaft fastening hole 11 is tightened, and the collar 1 is fastened to the shaft or the like. Shaft fastening structure.

FIG. 8 is a perspective view showing an example of the use of such a shaft fastening collar. FIG. 8 (a) shows a collar 1 having two shafts S ₁ and S 2.
Allowed span _second end, a case where the axis S _1, S ₂ of the two was coupled to secured together by tightening the bolt 2. (B) shows a case in which an axial bolt 3 is attached to the collar 1 fixed to the shaft S and screwed to the flange or pulley P, and the flange or pulley P is fixed to the shaft S via the collar 1. (C) shows a case where the collar 1 is fixed to the shaft S, and is used as a stopper of the slide table T which is inserted through the shaft S and reciprocates in the axial direction.

As described above, the shaft fastening collar has a simple structure and requires only a simple operation of tightening one bolt. Therefore, the collar is easily used for shafts of various devices. If the color body 10 is too large or if it is used repeatedly
Plastic deformation or deformation of the screw hole or the threaded portion of the bolt often causes a phenomenon that the collar 1 does not separate from the shaft even if the bolt 2 is loosened.

[0006]

SUMMARY OF THE INVENTION The present invention solves such a problem, and not only can one bolt be used for easy fastening, but also by loosening the bolt, the slit portion of the collar body can open the mouth securely. It is an object of the present invention to realize a shaft fastening structure in which the fastening is released.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a radial slit is provided at one position of a substantially circular collar body as viewed from the axial direction, and one side of the collar body separated by the slit is parallel to the slit. Forming a concave portion having two inner wall surfaces, and forming a loose hole perpendicular to the slit surface between the slit and the slit-side inner wall surface of the concave portion, while forming a loose hole on the other side of the collar body separated by the slit. Form a screw hole perpendicular to the slit surface, insert a bolt through the screw hole from the outside of this screw hole toward the loose hole, form a retaining ring groove at a predetermined position below the neck of the bolt, and after inserting the bolt A shaft fastening structure characterized in that a retaining ring is driven into the retaining ring groove. Alternatively, a radial slit is provided at one place of a substantially circular boss portion of the shaft mounting part, and the shaft is separated by the slit. On one side of the boss portion, a concave portion having two inner wall surfaces parallel to the slit is formed, and a loose hole perpendicular to the slit surface is formed between the slit and the slit-side inner wall surface of the concave portion, A screw hole perpendicular to the slit surface is formed on the other side of the boss portion separated by the slit, a bolt is inserted from the outside of the screw hole through the screw hole toward the loose hole, and a predetermined portion under the neck of the bolt is provided. A retaining ring groove is formed at a position, and a retaining ring is driven into the retaining ring groove after a bolt is inserted.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the shaft fastening structure of the present invention,
Regardless of whether the collar or boss is tightened or loosened with respect to the shaft, the force of the screw is used to forcibly perform this operation. Can be separated.

[0009]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the shaft fastening collar, and FIG. 2 is an AA cross-sectional view thereof. Reference numeral 15 denotes a concave portion formed in parallel with the slit 12 of the collar body 10, and reference numeral 22 denotes an E-shaped retaining ring inserted into the bolt 2. The retaining ring 22 will be described later.

The collar body 10 is substantially the same as that shown in FIG. 7, except that the loose holes 13 and
The position of the screw hole 14 is reversed, and a recess 15 having two inner wall surfaces parallel to the slit 12 is formed at the tip of the loose hole. A perspective view of the bolt 2 and the retaining ring 22 is shown in FIG. 3, and a front view of the bolt 2 is shown in FIG. The bolt 2 is provided with a retaining ring groove 21 at a predetermined position under the neck corresponding to the sum of the length of the loose hole 13 of the collar body 10, the width of the slit 12, and the length of the screw hole 14. After being inserted,
An E-shaped retaining ring 22 is driven into the retaining ring groove 21. The retaining ring 22 is a commercially available product made of an elastic material such as spring steel.

FIG. 5 is an enlarged partial sectional view showing the vicinity of the concave portion 15 in FIG.
Is the opposite wall. As can be seen from FIGS. 5 and 2, when the collar 1 is tightened with respect to the shaft or the like, the bolt 2 is rotated counterclockwise, which is opposite to the usual, and the screw hole 14 pulls the bolt 2 rightward. Since the retaining ring 22 presses the wall surface 151 of the concave portion 15 on the loose hole 13 side (slit 12 side), the tightening is achieved. To loosen the collar 1, if the bolt 2 is rotated clockwise, the retaining ring 22 separates from the wall surface 151 on the loose hole 13 side, and at the same time,
Since the tip of the bolt 2 pushes the wall surface 152 on the opposite side of the concave portion 15, the collar body 10 is opened. That is, in the shaft fastening collar of the present invention, since both the tightening and the loosening are forcibly performed with the force of the "screw", there is a problem that the collar does not separate from the shaft even if the bolt is loosened as in the past. Absent.

Although the present invention has been described with reference to the example of the collar for fastening the shaft, for example, if the same structure as this collar is adopted in the boss portion of the shaft coupling which is attached to the end of the drive shaft, attachment and detachment can be performed. The present invention is a pulley to be attached to a shaft, such as realizing a shaft coupling that can be reliably performed,
It can be widely applied as a fastening structure for bosses of flanges, gears and other parts.

[0013]

According to the present invention, even if some deformation or the like is caused by repeatedly using the shaft fastening collar, the inner diameter portion is forcibly expanded by the force of the screw, so that the collar is not separated. Therefore, there is an effect that the disassembling operation of the device can be efficiently performed in an overhaul or the like.

[Brief description of the drawings]

FIG. 1 is a plan view of a shaft fastening collar showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view showing a bolt and a retaining ring in the embodiment of the present invention.

FIG. 4 is a front view showing a bolt according to the embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing a part of FIG. 2 in an enlarged manner.

FIG. 6 is a plan view of a shaft fastening collar showing a conventional technique.

FIG. 7 is a sectional view taken along the line BB of FIG. 6;

FIG. 8 is a perspective view showing an example of use of a shaft fastening collar according to the present invention.

[Explanation of symbols]

 1 Collar 2 Bolt 10 Collar body 11 Shaft fastening hole 12 Slit 13 Loose hole 14 Screw hole 15 Recess 21 Retaining ring groove 22 Retaining ring

Claims (2)

[Claims] 1. A radial slit (12) is provided at one location of a substantially circular collar body (10) as viewed from the axial direction, and one side of the collar body (10) separated by the slit (12) is provided. Two inner walls parallel to the slit (12) (151,
152), a recess (15) having a slit (1) is formed.
2) and the inner wall surface (151) on the slit (12) side of the recess (15)
) And a loose hole (13) perpendicular to the slit surface, and a screw hole (14) perpendicular to the slit surface on the other side of the collar body (10) separated by the slit (12) A bolt (2) is inserted from the outside of the screw hole (14) through the screw hole (14) toward the loose hole (13), and a retaining ring groove ( twenty one)
And a driving ring (22) is driven into the retaining ring groove (21) after the bolt (2) is inserted. 2. A substantially cylindrical boss portion of a shaft mounting part is provided with a radial slit at one place, and one side of the boss portion separated by the slit has two inner wall surfaces parallel to the slit. A recess is formed, and a loose hole perpendicular to the slit surface is formed between the slit and the inner wall surface on the slit side of the recess, while a screw hole perpendicular to the slit surface is formed on the other side of the boss portion separated by the slit. A bolt is inserted from the outside of the screw hole through the screw hole toward the loose hole, a retaining ring groove is formed at a predetermined position below the neck of the bolt, and a retaining ring is inserted into the retaining ring groove after the bolt is inserted. A shaft fastening structure characterized by driving.