US3701303A

US3701303A - Stop ring

Info

Publication number: US3701303A
Application number: US127118A
Authority: US
Inventors: Isamu Kondo
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-03-23
Filing date: 1971-03-23
Publication date: 1972-10-31
Anticipated expiration: 1989-10-31

Abstract

A circular stop ring has hook parts of a L-shape of a circular shape or other shapes which catch nipples of snap pinchers and which is protruded and formed on the base surface of a stop ring body having a gap formed between the hook parts by cutting and separating a part of the circular stop ring.

Description

Umted States Patent 1151 3,701,303

Kondo 1451 Oct. 31, 1972 [541 STOP RING 2,595,787 5/1952 Heimann ..85/8.8 72 Inventor: Isamu Kondo 2 99 Aza Mi i 3,204,991 I Hauk *j zxf 'jlg FOREIGN PATENTS 0R APPLICATIONS 618,117 2/1949 Great Britain ..287/DIG. 7 [22] d' 1971 889,388 9/1953 Germany ..85/8.8 [21] Appl. No.: 127,118 137,832 10/1952 Sweden ..85/8.8

52 .Cl ..85 8.8 81 302 Primary Farms 1511 c1 Flb 2 1/18 Atwmey-wendewth- Lind Pmack [58] Field of Search.....8S/8.8, 8.6; 287/135; 285/39,

285/321 [57] ABSTRACT A circular stop ring has hook parts of a L-shape of a [56] References Cited circular shape or other shapes which catch nipples of P snap pinchers and 1S protruded and formed on the base surface of a stop ring body having a gap 1,328,399 1/1920 Ready ..85/8.8 formed between h hook parts by cutting and gigs? separating a part of the circular stop ring. 2:456:572 12/1948 Wagstaff ..85/8.8 6 Claims, 11 Drawing Figures PATENTEDnm a: ma

SHEU 1 0F 4 Fig 5 PATENIED um 3 I I972 SHEET [1F 4 -FigbA STOP RING The present invention relates to a stop ring for use on both a shaft and a hole and more particularly relates to such' a stop ring which has hook parts protruded and formed on a base surface of the stop ring body in such a manner that they face each other and have a gap formed and disposed therebetween by cutting and separating a part of the stop ring.

Generally speaking, in the case of installing a gear on a shaft, a stop ring is employed for overcoming movement in the axial direction of the gear in order to prevent it from axial directional movement. But the stop ring formerly used was, as shown in FIG. 8, such a ring in which small holes 19 were formed on protruded ends 18 disposed on the both ends of the stop ring with a gap formed therebetween by cutting and separating. Then, by inserting a nipple 21 of snap pinchers 20 into these small holes 19 and by opening the said gap with manipulation of snap pinchers 20, the installing and the removing of the stop ring 17 into and from a circular groove A provided on the circumference of a shaft 15 attached with a gear 16, have been performed.

In this instance an operation for fitting the stop ring 17 into the groove 15A of the shaft 15 is comparatively simple. But, under the condition wherein the stop ring 17 is installed on the shaft 15, the gear 16 is in contact with the side surface of the ring 17, and therefore, nipples 21 of the snap pinchers 20 are prevented by the side surface of the gear 16 from being deeply inserted into the small hole 19. Consequently, although no problem would be confronted with the opening of a gap of the stop ring, it is necessary to depend on a frictional force only between the nipple 21 and the small hole 19 when pulling it in the axial direction. Therefore, the removal operation was performed under extremely troublesome circumstances in the past. Accordingly, in the worst case, there often existed such an instance in which machinery had to be dismembered and a shaft had to be removed from a pillow block in order to remove a single stop ring.

The first object of the present invention is to provide a device wherein the stop ring has protruding hook parts, into which nipples of snap pinchers are inserted to hold it in the circular direction and the axial direction of a shaft.

The second object of the present invention is to provide a device wherein the stop ring is formed by cutting and raising a part of the base surface of the stop ring body in a L-shape to form the hook parts and, further, by facing the open end sides of the cut-raised parts to each other with the gap provided therebetween.

The third object of the present invention is to provide a device wherein the stop ring is obtained by cutting and raising a part of the base surface of the stop ring body in a L-shape to form the hook parts and, further, by forming and facing the open end sides of the said cut-raised parts in the opposite direction away from the gap.

The fourth object of the present invention is to provide a device wherein the cut-raised parts, as shown in the foregoing second and third objects, are provided face to face with each other on each base surface, each part of each cut-raised part being L-shaped, whereby the holding surfaces necessary for expanding and contracting the gap and removing the device in the axial direction by inserting snap pinchers into the interior surface of the both cut-raised parts are formed.

The fifth object of the present invention is to provide a device wherein all of the hook parts formed by the cut-raised parts for the snap pinchers can be formed by press working.

The sixth object of the present invention is to provide a device wherein the hook parts required for inserting the nipples of the snap pinchers could be formed and attached not only by press working but also by studding pins with heads or welding orsoldering a small piece of a L-shape of a U-shape or a half-cut cylindrical shape on the base surfaces of the stop ring body.

The seventh object of the present invention is to provide a device wherein the base surfaces can be protruded and formed either inwardly or outwardly from the circumference of the stop ring body and, having the hook parts formed on such base surfaces, the stop ring being either for use in a shaft or in a hole.

All of these objects are accomplished by configurations, structures and combinations of the respective parts comprising the present invention, the preferred embodiments of which are shown by way of example in the accompanying drawings and hereafter described in detail.

FIG. 1 is a perspective view of a stop ring for use on a shaft, and is a first practical embodiment of the present invention;

FIG. 2 shows a perspective view of a stop ring in accordance with a second practical embodiment of the present invention;

FIG. 3 shows a perspective view of a third practical embodiment of the stop ring of the present invention;

FIG. 4 shows a perspective view of a fourth practical embodiment of the stop ring of the present invention;

FIG. 5 is an enlarged perspective view of the operation of the first embodiment shown in FIG. 1;

FIGS. 6A and 68 respectively show a front view and a side view of the condition under which by using snap pinchers the attaching and removing of the stop ring of FIG. 1 is performed;

FIGS. 7A and 7B respectively show a front view and a side view of the condition under which the inserting and removing of a stop ring such as shown in FIG. 2 may be performed; and

FIGS. 8A and 88 respectively show a front view and a side view of the conventional method for manipulating the attaching and removing a stop ring.

In FIG. 1, a gap 2A is formed by the forming of a notch on a part of the circumference of the stop ring body 1A for use on a shaft. The flat base surface 3A on each side of gap 2A protrudes outwardly from the circumference and has therein acut-raised part 5A formed by the cut-in 4A from the side of gap 2A by press working on base surface 3A. The cut-raised part 5A is formed in a L-shape by bending it in parallel with the base surface 3A, and a hook part 6A is formed between the cut-raised part 5A and the base surface 3A.

FIG. 2 shows a stop ring for use in a hole in which the arrangements in the foregoing practical embodiment are reversed and the cut-raised parts 58 formed by the cut-ins 4B are cut and raised so that the open end sides face away from the gap 2B. As shown in the drawing, the cut-raised parts 5B are formed in a L-shape, and the hook parts 68 are formed.

As for FIG. 3, a pair of cut-raised parts SC in a L- shape section are formed to face each other by press working on each base surface 3C of the stop ring body 1C opposite the gap 2C. Thus, hook parts 6C of ac] shape section with a partly cut-off space between the ends of the two cut-raised parts C are formed.

Each hook part of the stop ring bodies shown in the drawings from FIG. 1 to P16. 3 illustrate examples wherein all of the forming work is performed by press working.

However, FIG. 4 shows one example in which press working is not employed and shows a practical embodiment of a stop ring for use in a hole wherein a pin 9 with a flat head 8 projects from each base surface 3D of the stop ring body 1D with a gap 2D. The hook parts 6D are formed on the both sides of the flat heads 8.

For a different configuration from this practical embodirnent, there might be provided a small piece of semicircular arc shape formed by cutting a ring into half, or a small piece of a L-shape or a1] -shape section could be attached.

FIGS. 2, 3 and 4 described above show examples wherein a stop ring for use in a hole is particularly employed, but it is needless to say that by protruding and forming the cut-raised portion outwardly from the circumference of the stop ring body and, further, by providing a hook part thereon, it could be applied to the stop ring for use in a shaft.

Now, the condition under which a shaft stop ring is inserted and attached on the shaft shall be described in FIGS. 5 and 6 using the stop ring as shown in FIG. 1 as exemplary.

First, in case a shaft stop ring 1A inserted and fitted, as shown in FIG. 68, into a circular groove 11 on the circumference of a shaft so as to hold a gear 22, which is keyed on the circumference of the shaft 10, is to be removed, nipples 13 of a flat shape and with the base parts broadened which are disposed at the tip ends of snap pinchers, are inserted into the hook parts 6A from the outside of the circumference of the stop ring body 1A, that is, from the circumferential direction of the shaft. By tightly holding handles 14 of the snap pinchers and by opening the nipples 13 with a holding pin 15 of the handles 14 serving as the center, the cutraised parts 3A of the shaft stop ring is expanded via the hook parts 6A. Then, the stop ring is withdrawn along the shaft 10 from the circular groove.

in this instance each nipple 13 of the snap pinchers 12 is, as shown in FIG. 5, supported by three holding surfaces, that is, the base surface of cutraised part 3A of the stop ring body 1A and the surfaces made by the L-shape of the cut-raised part 5A. Therefore, the stop ring will be held in a stabilized condition not only during expansion in the circumferential direction but also during movement in the axial direction, and thus, the stop ring can be removed easily.

In case the stop ring shown in FIG. 2 is installed in a groove in a hole and is to be removed from the groove, snap pinchers 12 as shown in FIG. 7 provided at its tip ends with nipples 13 of a flat shape, with the base part of the tip ends broadened, and with the tip ends bent, are used. The nipples 13 are inserted and fitted into the hook parts 6B of the stop ring 1B which is positioned in the circular groove 11A of the shaft hole 10A and which thus holds a bush 16A. The nipples 13 are held by surfaces made by the hook part 6B of a L-shape and the base surface 313. By grasping the handles 14, the

gap 28 is narrowed by the nipples 13 so that the outer circumferential edge of the stop ring body 18 is removed from the circular groove 11A and, thus, may be removed in the axial direction.

The manipulation described above is entirely the same for the practicalembodiments shown in FIGS. 3 and 4, and the point common to any of the embodiments is that, having arranged the hook part formed with a shape necessary for inserting the nipples of the snap pinchers in parallel with the base surface protruding inwardly or outwardly from the circumference of the stop ring, the nipples 13 may be inserted therein, and the supporting surfaces necessary for expanding and contracting the gap of the stop ring body are provided. By these arrangements the installation and removal of the stop ring may be performed very easily with the employment of the snap pinchers provided with rigid and flat nipples, because the stop ring for use in a shaft or a hole maybe kept under a stabilized condition by pressure produced by these three surfaces during expansion, contraction and movement in the axial direction.

Consequently, in general, it is usual that a stop ring is installed adjacent to a machinery element such as a gear, etc. However, even in such a case the movement of the stop ring shall not be affected by such elements, and its effectiveness is apparent since its use eliminates all troublesome work such as dismembering machinery in order to remove a stop ring as performed formerly.

What is claimed is:

l. A stop ring comprising a circular stop ring body having a radial gap formed therein; a base surface extending radially from each end of said body adjacent said gap; at least one cut-raised part extending perpendicularly from each of said base surfaces; and a holding surface extending from each of said cut-raised parts and being parallel with each of said base surfaces; whereby a hook part is formed between each of said holding surfaces and said base surfaces for receiving the nipple of a tool for insertion and removal of said stop ring.

2. A stop ring as claimed in claim 1, wherein said base surfaces extend radially outwardly from said each end of said body; and wherein said holding surfaces extend from said cut-raised parts toward said gap, each pair of said cut-raised parts and said holding surfaces form an L-shape.

3. A stop ring as claimed in claim 1, wherein said base surfaces extend radially inwardly from said each end of said body.

4. A stop ring as claimed in claim 3, wherein said holding surfaces extend from said cut-raised parts away from said gap, each pair of said cut-raised parts and said holding surfaces form an L-shape.

S. A stop ring as claimed in claim 3, wherein each of said base surfaces have thereon a pair of perpendicularly extending cut-raised parts; and said holding sur faces of said cut-raised parts of each of said base surfaces extend toward each other; said pair of cut-raised parts and respective holding surfaces of each of said base surfaces form an :1 -shape.

6. A stop ring comprising a circular stop ring body having a radial gap formed therein; a base surface extending radially inwardly from each end of said body adjacent said gap; at least one raised part extending perpendicularly from each of said base surfaces; and a holding surface extending from each of said raised parts and being parallel with each of said base surfaces; whereby a hook part is formed between each of said holding surfaces and said base surfaces for receiving

Claims

1. A stop ring comprising a circular stop ring body having a radial gap formed therein; a base surface extending radially from each end of said body adjacent said gap; at least one cut-raised part extending perpendicularly from each of said base surfaces; and a holding surface extending from each of said cut-raised parts and being parallel with each of said base surfaces; whereby a hook part is formed between each of said holding surfaces and said base surfaces for receiving the nipple of a tool for insertion and removal of said stop ring.

5. A stop ring as claimed in claim 3, wherein each of said base surfaces have thereon a pair of perpendicularly extending cut-raised parts; and said holding surfaces of said cut-raised parts of each of said base surfaces extend toward each other; said pair of cut-raised parts and respective holding surfaces of each of said base surfaces form an -shape.

6. A stop ring comprising a circular stop ring body having a radial gap formed therein; a base surface extending radially inwardly from each end of said body adjacent said gap; at least one raised part extending perpendicularly from each of said base surfaces; and a holding surface extending from each of said raised parts and being parallel with each of said base surfaces; whereby a hook part is formed between each of said holding surfaces and said base surfaces for receiving the nipple of a tool for insertion and removal of said stop ring; said raised parts comprising pins extending from said base surfaces, and said holding surfaces comprising heads of said pins.