JPH0227203Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a C-shaped eccentric stopper with eccentric outer and inner circumferences that is inserted into a groove formed on the outer circumference of a shaft or on the inner circumference of a hole to prevent a mating member from slipping out. Concerning rings.

(Prior art) As shown in Fig. 3, the conventional eccentric retaining ring shifts the center _O1 of the outer circumference downward from the center _O2 of the outer circumference by 0.26≦
The shape was surrounded by two circles such that e/B≦0.38.

(Problem to be solved by the invention) By the way, in the above-mentioned conventional technology, when the opening 1 is pulled or pressed in the tangential direction P for insertion into the shaft or the groove of the hole, the bending stress distribution on the inner and outer peripheries is As shown in Figure B, there was a problem in that it was not equalized and deformed into an elliptical shape when a load was applied.

The present invention aims to solve the above problem, that is, to make the bending stress distribution on the inner and outer peripheries as uniform as possible, and to make the deformation as close to a perfect circle as possible.

(Means for Solving the Problems) The present invention was made by focusing on the above-mentioned problems. Or, the inner circular arc makes the upper half with the opening eccentric to the left and right, respectively,
The lower half is characterized by a series of circular arcs that are eccentric in the vertical direction so that the thickness is greatest at the lower center and gradually becomes narrower toward the end of the opening.

(Example) Hereinafter, a detailed explanation will be given based on the illustrated example. FIG. 1 shows an eccentric retaining ring for a shaft. The inner circumference is
It is a circular arc 1a with a diameter Di centered at _O3 . The outer periphery is centered on the upper left and right parts having the opening 1b, respectively.
Eccentric point O ₄ with f eccentricity on the opposite side and e eccentricity downward from O ₃
An arc 1c with a radius R′ ₀ centered on , and an arc 1d with a radius R ₀ centered on an eccentric point O ₅ whose lower half is eccentric below the center O ₃ are connected. There is. And 0.26≦e/B≦0.38.

FIG. 2 shows an eccentric retaining ring for holes. The outer circumference is O ₆
It is an arc 2a with a diameter D ₀ centered at . The inner circumference is
The upper half left and right parts having the opening 2b are respectively e above the center O ₆ and f eccentric to the same side. An arc 2c with a radius R'i centered on the eccentric point O ₇ , and the lower half is the center O ₆
Both circular arcs 2c and 2d of a circular arc 2d having a radius Ri centered on an eccentric point O ₈ which is eccentrically e-centered upward are arranged in series. Then, 0.13≦f/B≦0.19.

Next, the effect will be explained. When the opening 1b or 2b is pulled or pressed in the tangential direction P for insertion into the shaft or the groove of the hole, the bending stress distribution on the inner and outer peripheries is the fourth.
As shown in Figure A, the deformation is approximately uniform and the deformation is close to a perfect circle.

(Effect) According to the present invention, the inner circumference inserted into the groove on the outer circumference of the shaft or the outer circumference inserted into the groove on the inner circumference of the hole is a perfect circle, and the arc of the outer circumference or inner circumference is eccentric to the left and right, respectively, with the upper half having the opening. The lower half is made up of circular arcs that are eccentric in the vertical direction, with the maximum thickness at the lower center and gradually narrowing towards the opening edge, making it possible to equalize the distribution of bending stress on the inner and outer circumferences. The deformation becomes close to a perfect circle, and the inner periphery or outer periphery can be uniformly crimped onto the shaft or the groove of the hole, thereby ensuring a locking effect.

[Brief explanation of the drawing]

Fig. 1 is a front view of an eccentric retaining ring for a shaft according to an embodiment of the present invention, Fig. 2 is a front view of an eccentric retaining ring for a hole according to an embodiment of the present invention, Fig. 3 is a front view of a conventional eccentric retaining ring, and Fig. 4 is a front view of an eccentric retaining ring for a hole according to an embodiment of the present invention. The figure is a comparison diagram showing the inner and outer peripheral stress ratios with respect to the center angle of the product of the present invention and the conventional product. 1...Eccentric retaining ring for shaft, 1a...Inner circumference arc,
1b...opening, 1c, 1d...circular arc of outer periphery, 2
... Eccentric retaining ring for hole, 2a ... Circular arc of outer periphery, 2b
...Aperture, 2c, 2d...Inner circumference arc.

Claims (1)

[Scope of utility model registration request] The inner periphery to be inserted into the groove on the outer circumference of the shaft or the outer periphery to be inserted into the groove on the inner periphery of the hole is a perfect circle, and the arc of the outer periphery or inner periphery is such that the upper half with the opening is eccentric to the left and right, and the lower half is in the vertical direction. An eccentric retaining ring with eccentric circular arcs arranged in series so that the thickness is greatest at the lower center and gradually becomes narrower towards the opening end.