JP3056707U - Shaft stop mechanism - Google Patents

Abstract

(57) [Problem] To solve the problem of the present invention, a taper of a shaft fixing mechanism composed of an inner and outer ring for fixing a gear or a wheel to a shaft or other shaft by being fixed thereto and a taper ring fitted between the inner and outer rings. The eccentric fixation is prevented by providing the ring with a spring mechanism so that the ring can be reduced and enlarged and follows the error amount of the mating side. According to the present invention, a spring portion (6) is formed on a plate surface of a tapered ring (3.4) at at least two circumferential positions at equal intervals so that it can be reduced and enlarged with a small force and follows an error amount. It helps prevent eccentric sticking.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a shaft fixing mechanism used when a gear or a wheel is fixed to a shaft or another shaft.

[0002]

[Prior art]

 Conventionally, as this kind of shaft stopping mechanism, there is one described in Japanese Utility Model Laid-Open No. 4-2722006 proposed by the present inventors. Japanese Unexamined Utility Model Publication No. Hei 4-27206 has a notch formed by cutting a part of the ring at one place on the inner ring and the outer ring, and one notch on the taper ring (ring nut). The cut notch is formed.

[0003]

[Problems to be solved by the invention]

 In the above-mentioned shaft stop mechanism, when the left and right taper rings approach each other by tightening the screw, the inner ring is displaced inward to reduce the diameter, and the outer ring is greatly displaced outward because the diameter is increased outward. It is tightly fixed to the shaft in the form of a stopper. The inner and outer rings can be deformed by expanding and contracting with a small force because a part of each ring is cut.However, if the taper ring is not cut, it is difficult to reduce and expand. A part is cut and a notch is provided. However, when a part of the tapering is cut, it may be eccentric depending on the position of the cut edge, and there is a problem that the tapering is easily fixed in an eccentric state.

Accordingly, in the present invention, not the conventional cutout portion which is partially cut into a taper ring, but a spring portion formed by cutting, can be reduced and expanded with a small force, and follows the error amount. It is possible to prevent eccentric fixation, and to solve the above-mentioned disadvantage.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention provides an outer ring and an inner ring each having a cutout portion capable of expanding and contracting a diameter, and an axially opposite side between the inner and outer rings. A pair of left and right taper rings that are more wedge-fitted, and a plurality of screw bodies interlocked so as to move the left and right taper rings into and out of perspective by screwing and have a head for rotating operation at one end. In the device provided with the taper ring, at least two or more circumferentially equally spaced spring portions are provided on the tapered ring so as to allow a part of the plate surface to deform in a direction following the expansion or contraction of the inner and outer rings. To solve the problem.

[0006]

[Embodiment of the invention]

 When the screw body is tightened, the inner ring 2 is displaced in the opposite direction and is reduced in diameter at the same time as the outer ring is expanded through the taper ring, so that the displacement of the inner and outer rings causes the gear and the shaft to be connected and fixed. .

After tightening of the screw body, if there is a dimensional error in either or both of the inner and outer races (gears, shafts), the tapered ring has a spring portion formed on a part of its plate surface. Since it is deformed in a direction following the error amount, eccentric fixation is prevented, and there is no so-called fixation mistake.

[0008]

【Example】

 Hereinafter, an embodiment will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the outer ring 1 has a cylindrical split ring shape having a cut-out portion 11 in which a part of an outer peripheral surface is cut, and an inner peripheral surface has a left end and a right end on both sides from a central portion. The diameter increases as you go to the mouth. The second tapered surface 12.13 is formed. The inner ring 2 is a cylindrical split ring having a cutout portion 21 which is also concentrically inside the outer ring 1 and also has a part of the outer peripheral surface cut, and has a smaller diameter in the outer peripheral surface from the center toward the left and right end openings. Third. The fourth tapered ring 22.23 is formed.

As shown in FIGS. 3 and 4, the taper ring 3.4 is fitted between the inner and outer rings 1.2 from the left and right ends of the inner and outer rings 1.2. On the peripheral surface, the first. Tapered surfaces 33.34 and 43.44 corresponding to the second tapered surface are formed, and two parallel cut grooves 31.41 are formed in the inner and outer peripheral portions of the plate surface in opposite directions. The spring portion 6 is formed by the cut grooves 31.41 and the coupling portions 32.42 therebetween. The spring portion 6 is formed by the cut groove 31.41 and the coupling portion 32.34 therebetween. The spring coefficient can be determined to a desired value by adjusting the depth of the cut groove 31.41 and the width of the coupling portion 32.42. The spring portions 6 are formed at least at two or more locations on the plate surface of the tapered ring 3.4 at equal circumferential intervals. In the illustrated embodiment, two spring portions 6 are formed at 180-degree positions, but are formed at 120-degree positions at three-position positions and at 90-degree positions at four-position positions.

The left and right tapered rings 3.4 are formed so that a large number of screw holes are arranged at substantially equal intervals on the circumference of the plate surface, and a screw body 5 is provided one for each screw hole. When the screw is inserted and turned in the tightening direction, the left and right tapered rings 3.4 move in a direction approaching each other, and conversely, when turned in the loosening direction, the tapered rings 3.4 are separated. Each screw body 5 has a head 5a at one end and a square hole 5b for screwdriver on the end face.

As shown in FIGS. 1 and 2, the shaft fixing mechanism of the present invention has a gear 50 attached to a part of a shaft 20 such as a rotating shaft, and an outer peripheral surface 61 of the shaft 60. The gear 50 is incorporated in the annular recess 52 with the inner peripheral surface 51 a of the boss 51.

[0013]

[Effect of the invention]

 As described above, according to the present invention, at least two spring portions are formed at least at equal intervals on a part of the plate surface of the tapered ring interposed between the inner and outer rings, so that the inner and outer rings are tightened after the screw body is tightened. Even if there is a large dimensional error in the mating member of the wheel, the spring of the tapered ring is deformed in the direction following the error amount, eliminating eccentricity and fixing error, and accurately and firmly fastening the shaft with a small force. It becomes possible. Also, the configuration is extremely simple, and the cost is also advantageous.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of an embodiment showing a shaft fixing mechanism of the present invention.

FIG. 2 is a front view taken along line AA of FIG. 1;

FIG. 3 is a front view of the taper ring.

FIG. 4 is a plan view of a tapered ring partially shown in section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3.4 Taper ring 5 Screw body 6 Spring part 31.41 Cut groove 32.42 Coupling part

Claims (2)

[Utility model registration claims] 1. An outer ring (1) and an inner ring (2) each having a cutout portion capable of increasing and decreasing the diameter, and a pair of left and right tapers fitted between the inner and outer rings from both sides in the axial direction. An apparatus comprising: a ring (3.4); and a plurality of screw bodies (5) interlocked to move the left and right taper ring to and away from each other by screwing and having one end with a rotating head. The taper ring (3.4) is provided with at least two or more circular spring portions (6) that allow a part of the plate surface to deform in a direction following the expansion or contraction of the inner and outer rings. A shaft stopping mechanism formed at equal intervals around the circumference. 2. The spring portion (6) is formed by forming two parallel cut grooves (31.41) formed on an outer peripheral surface and an inner peripheral surface of a taper ring (3.4) and a coupling portion (32) therebetween. .42), the shaft stopper mechanism according to claim 1.