JPH06264921A - Radial ball bearing integral with rotating member and assembling method thereof - Google Patents

Abstract

PURPOSE:To reduce the size of a rotating member by integrating the rotating member with a radial ball bearing. CONSTITUTION:A raceway groove 16 for steel balls 14 is provided in a pulley 10. An inner ring 18 is provided with a flange part 26 which is expanded along the outer surface of the steel balls 14 and a lock ring groove 30. The lateral movement of the steel balls 14 is suppressed by the flange part 26 and an CS- type lock ring 32. Because both ends of the inner ring 18 are protruded from the side surface 11 of the pulley 10, the side surface 11 of the pulley 10 is not made in contact with the inner wall 62 of a frame 60. Thus a smooth rotation of the pulley 10 is assured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing mechanism of a lightly loaded rotary member incorporated in a limited space, and more specifically, to a mechanical member of a smoke proof / exhaust facility, particularly a smoke exhaust window, a smoke exhaust port, The present invention relates to a pulley or the like that guides a wire rope that operates a smoke exhaust damper or the like.

[0002]

2. Description of the Related Art Smoke control equipment installed in a building depends on the structure and aesthetics of the building and is spatially restricted, as well as a smoke exhaust window, a smoke exhaust port, a smoke exhaust damper and its operating members. The position related to and does not necessarily have a spatially and mechanically advantageous arrangement. Therefore, for example, when transmitting an operating force, it is often necessary to go through a path bent by a wire rope. Moreover, such smoke-proof and smoke-proof equipment is required not to operate all the time but to function reliably only in an emergency. Therefore, the pulley that guides the wire rope must be stationary at all times, rotate lightly reliably in an emergency, and transmit the operating force to the terminal equipment of the smoke prevention / emission control system without delay.

Therefore, a conventional pulley mainly used for this purpose is, for example, a pulley 400 as shown in FIG.
A commercially available radial ball bearing 402 was incorporated in it. However, the radial ball bearing 402 on the market has a higher dimensional accuracy than necessary for the purpose of use, and is inevitably expensive. Further, since it itself has standard dimensions, it cannot be incorporated in a pulley having a smaller outer shape than that, and a member for fixing the radial ball bearing 402 to the pulley is required. For this reason, the size of the pulley was inevitably large.

[0004]

In order to fix the radial ball bearing 402 in the axial direction with respect to the pulley 400 upon installation, for example, at least the collar 404 at the inner diameter of the pulley is used.
Must be provided to contact one surface of the outer ring 406 of the radial ball bearing 402, and a retaining ring groove 408 must be provided on the inner diameter of the pulley to press the opposite outer ring surface with the C-shaped retaining ring 410. This means that the entire width of the pulley 400 is increased by the processing width of the collar 404 and the retaining ring groove 408. Besides,
Since both end surfaces of the inner ring 412 of the radial ball bearing 402 are located inside the both side surfaces of the pulley 400, the mounting frame of the pulley 400 is attached.
Spacers 416 and 417 must be provided on the fixed shaft 414 to prevent both sides of the pulley 400 from contacting the 401.

An object of the present invention is to make a rotating member and a radial ball bearing integrally, which enables miniaturization, has a function in conformity with the purpose of use within a necessary range, and is a cost-effective rotating member. And an assembling method thereof. Therefore, although the embodiment describes a pulley, it is needless to say that it can be applied to rotating members such as gears, sprockets, pulleys, friction wheels, and door wheels as long as the load is light.

[0006]

In order to achieve the above object, a radial ball bearing integral with a rotating member of the present invention has a hollow disk-shaped rotating member as an outer ring of a radial ball bearing, which is formed along the inner circumference. Provide a raceway groove for steel balls. In addition, the outer peripheral body is used as the raceway surface of the steel ball, and on one side of this raceway surface is provided a flange part that expands along the outer shape of the steel ball, and on the other side is a hollow stepped part with a reduced diameter body part. The cylinder is the inner ring. A step between the body portion of the raceway surface and the reduced diameter body portion is formed to be almost equal to the depth of the raceway groove of the outer ring, and the position of the inner ring side revolution surface is coaxial with the position of the outer ring side revolution surface on a coaxial line. When you shift
The steel ball is held at a position where the steel ball passes between the shoulder of the step and the shoulder of the outer raceway groove in the inner ring.

Therefore, a steel ball 1 is formed on the entire circumference of the raceway groove.
After arranging and supporting a plurality of steel balls of the same diameter between the inner ring and the outer ring with a gap less than the number of balls, move relatively parallel so that the position of the inner ring side revolution surface matches the position of the outer ring side revolution surface. Then, the steel ball is supported by the raceway groove of the outer ring and the surface of the inner ring flange portion along the outer shape of the steel ball. On the other hand, a retaining ring groove is provided in the reduced diameter body portion of the inner ring, and a thin plate-shaped endless ring is provided with a plurality of axle-shaped pawls protruding in the radial direction from the inner diameter. It is mounted in a retaining ring groove provided in the inner ring to prevent the steel balls from coming off the track on the surface of the thin plate ring. The outer diameter of the bottom of the retaining ring groove is such that the tips of the claws protruding inward of the retaining ring are loosely fitted. The entire length of the inner ring is set such that the end surface of the flange portion and the end surface of the reduced diameter body portion project from both surfaces of the rotating member.

[0008]

In this structure, the steel ball is held by the raceway groove of the outer ring, the flange of the inner ring and the retaining ring, and the rotating member, such as the pulley, becomes the outer ring itself, so that the size can be reduced. It can be easily applied to the assembling in the enclosed space, and can be assembled very easily without requiring a special device for assembling and assembling the steel balls. Also, by providing a space less than one steel ball around the entire circumference in the raceway groove, it is possible to roll steel balls without interfering with each other without providing a steel ball retainer, which is extremely light. Rotation is possible. Further, the overall length of the inner ring is set such that the end surface of the flange portion and the end surface of the reduced diameter body portion project from both sides of the rotating member, so that the side surface of the pulley and the side surface of the mounting frame are prevented from contacting each other. Can be omitted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a radial ball bearing according to the present invention, and 10 is a wire rope guide groove 12 and a steel ball 1.
A rotating member provided with the outer ring raceway groove 16 of No. 4 is, for example, a pulley. Reference numeral 18 is an inner ring, which is a through hole 20 through which the fixed shaft is inserted.
The outer periphery is a body portion 22 which is a raceway surface of the steel ball 14, and a flange portion 26 formed by expanding a diameter by forming a contact surface 24 along the outer diameter of the steel ball 14 at one end and inserting the steel ball 14. A reduced diameter body portion 28 is provided as an escape to facilitate the above. The step S ₁ between the body 22 and the reduced diameter body 28 is almost equal to the depth S ₂ of the outer ring raceway groove 16. Further, reference numeral 30 is a retaining ring groove provided in the reduced diameter body portion.

Reference numeral 32 denotes a CS type retaining ring (trade name), which has a plate-shaped endless ring 34 on the outer circumference, and a plurality of claws 36 project radially from the inner diameter. The outer diameter d ₂ of the bottom of the retaining ring groove 30 is loosely fitted to the diameter d ₁ of the circle passing through the tip of the claw 36.

In assembling these, as shown in cross section in FIG. 2, the outer race side revolution surface 38 and the inner race side revolution surface 40.
Are arranged so as to be displaced on the coaxial line 42, and are held at a position where the steel ball 14 can pass between the shoulder 44 of the step on the inner ring and the shoulder 46 of the outer ring raceway groove.

Next, a predetermined number of steel balls 14 having the same diameter are inserted into the outer ring raceway groove 16 through the gap 48 formed by shifting the revolution surfaces 38 and 40 in parallel. The steel balls 14 are arranged along the outer ring raceway groove 16 along the entire circumference, including a void 15 less than one steel ball. Steel ball 14
It is stably held by the outer raceway groove 16 and the shoulder 44 of the inner ring step. Reference numeral 80 designates a holding base used for assembling the radial ball bearing according to the present invention, which holds the pulley 10 and has a sliding base 82 for holding the inner ring 18 in a predetermined position in the center thereof.
8 and the inner ring side revolution surface 40 are displaced and held at the position shown in the figure, or moved to the position shown by the chain double-dashed line to move both revolution surfaces 3
8,40 can be matched. 84 is a stopper.

Then, the pulley 10 on the outer ring side and the inner ring 18 are moved in parallel so that the outer race side revolution surface 38 and the inner race side revolution surface 40 coincide with each other. The tip of the claw 36 of the CS type snap ring 32 is brought into contact with the outer periphery of the end of the collar 50 of the snap ring groove 30 of the inner ring 18, and a strong pressure is applied toward the snap ring groove 30. By this operation, the tip of the pawl 36 gets over the brim 50 and fits into the retaining ring groove 30, and the side surface of the endless ring 34 of the CS type retaining ring 32 lightly contacts the steel ball 14. Since the tip of the pawl 36 of the CS retaining ring 32 is blocked by the collar 50, the CS retaining ring 32 does not fall out of the retaining ring groove 30, and the endless ring 34 does not hinder the movement of the steel ball 14. Claws of commercially available CS retaining ring 3
No. 6 has all its tips bent in one direction, so when the CS type snap ring 32 is press-fitted into the snap ring groove 30, the pawl 36
Due to the warp, the press-fitting is easy, but in the pulling-out direction, it becomes a reverse claw and the check function works, making the pulling-out difficult.

The pulley 10 in which the radial ball bearing is integrally incorporated in this way is axially locked to the inner ring 18 through the steel ball 14, and the rolling of the steel ball 14 causes the pulley 10 to move around the inner ring 18. It rotates very lightly. In this embodiment,
The pulley 10, the steel ball 14, and the CS type retaining ring 32 are made of stainless steel, and the inner ring 18 is made of brass, but each member can be made of steel or plastic depending on the place of use and function, and each member can be used. Can be arbitrarily selected.

FIG. 3 illustrates an embodiment in which the pulley 10 thus assembled is mounted on the frame 60. Both ends of the inner ring 18 of the pulley 10 are inserted into the inner wall 62 of the frame 60 in close contact with each other.
4 and the through hole 20 of the inner ring 18 are aligned with each other. Reference numeral 68 denotes a fixed shaft having a head 70 at one end, which is inserted through the shaft hole 66 and the through hole 20 and fixed at the other end 72 by caulking.

Both end surfaces of the inner ring 18 are side surfaces 11 of the pulley 10.
Since it protrudes further, the side surface 11 of the pulley 10 does not come into contact with the inner wall 62 of the frame 60 and become a resistance. Therefore, the light rotation of the pulley 10 is surely guaranteed even after the pulley 10 is mounted on other parts. Reference numeral 74 is a wire rope, and 76 is a protective plate for preventing the wire rope from coming off.

[0017]

As described above, according to the present invention, since the rotary member and the radial ball bearing are integrally assembled, it is possible to obtain a rotary member which is small in size, has a light and reliable rotation function. Therefore, even if the size is unavoidably reduced, the radial ball bearing mechanism can be configured so that the rotation function is not impaired, and it is used in locations where a reliable rotation function is required, such as smoke prevention equipment. Suitable for Furthermore, since no ready-made radial ball bearing is used, the material can be freely selected according to the usage environment.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a radial ball bearing integrated with a rotating member according to the present invention.

FIG. 2 is a vertical cross-sectional view showing an assembling process of a radial ball bearing integrated with a rotating member according to the present invention.

FIG. 3 is a vertical cross-sectional view showing an example of a frame mounting mode of a rotating member according to the present invention.

FIG. 4 is a vertical cross-sectional view showing an example of a frame mounting mode of a rotating member according to a conventional configuration.

[Explanation of symbols]

 10 pulley (rotating member) 14 steel ball 16 outer ring raceway groove 18 inner ring 20 through hole 26 flange part 30 retaining ring groove 32 retaining ring 60 frame 68 fixed shaft

Claims (2)

[Claims] 1. A hollow disk-shaped rotating member having a raceway groove for one steel ball along the inner circumference as an outer ring of a radial ball bearing, and one steel ball for the entire circumference in the raceway groove. A plurality of steel balls of the same diameter arranged with no voids, a retaining ring with a thin plate-shaped endless ring and a plurality of axle-shaped pawls protruding in the radial direction from the inner diameter, and a hollow cylindrical outer cylinder The portion is used as the raceway surface of the steel ball, and a flange portion that expands along the outer shape of the steel ball is provided on one side of this raceway surface, and the other side is reduced in diameter and this reduced diameter body part of the retaining ring A rotating member having an inner ring provided with a groove portion into which the tip of a claw protruding inward is loosely fitted, and a total length of the inner ring having a length such that an end surface of the flange portion and an end surface of the diameter-reducing barrel portion protrude from both surfaces of the rotating member. Integrated radial ball bearing. 2. The step between the body portion of the raceway surface and the reduced diameter body portion is formed to be almost equal to the depth of the raceway groove of the outer ring, and the position of the inner ring side revolution surface is relative to the position of the outer ring side revolution surface. When shifted in parallel on the coaxial line, the steel balls were held at a position where the steel balls pass between the shoulders of the step and the shoulders of the groove of the outer ring, and a predetermined number of steel balls were arranged and supported between the inner ring and the outer ring. After that, the inner ring side revolution surface is relatively translated so that the position of the inner ring side revolution surface coincides with the position of the outer ring side revolution surface, and the steel ball is along the outer raceway groove and the inner ring flange portion. The support according to claim 1, wherein the tip of the protruding claw of the retaining ring is mounted in a retaining ring groove provided in the inner ring to prevent the steel ball from coming off the track on the side surface of the retaining ring. A method for assembling a radial ball bearing integrated with a rotating member.