JPH01220762A - Monolithic construction and connecting mechanism of pulley, shaft and bearing - Google Patents

Abstract

PURPOSE:To make assembling of torque transmission mechanism efficient by making a mechanism to be fixed to a supporting object with a pulley, a rotary shaft thereof and an inner race of a bearing, and further providing with a connecting portion on top end of the rotary shaft. CONSTITUTION:This mechanism is of a parts formed as one body of a pulley 1, a rotary shaft 2 thereof and an inner race 8a of a bearing pivotally supporting the rotary shaft 2, and this can be used as a pulley with a bearing (pulley bearing) as a single body as it is when the bearing is fixed on its outer race 8b. Again, when a torque transmission mechanism is constituted, two pairs of integral construction of bearings 8-1, 8-2 are fixed on outer races to a fixture 4 with screws, and the fixture 4 is fixed to a supporting object 5. Connecting portions 2a having semicircular cross sections of two rotary shafts 2-1, 2-2 are abutted to each other for connecting together. Thereby, torque on one pulley is transmitted to the other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mechanism in which a pulley, a rotating shaft, and a bearing used for transmitting rotational force are integrally formed, and a coupling mechanism thereof.

[Prior Art] In the semiconductor manufacturing apparatus π, workpieces are moved at various locations. A rotational force transmission mechanism using a belt is used for the movement, an example of which is shown in FIG.

2 booleyts 1. The rotary shaft 2 is fixed to both ends of the rotating shaft 2, and the rotating shaft is pivotally supported by bearings 3-1, 3-2, and the bearings are supported by a support 6 via a fixture 4. Usually, belts 8-1 and 6-2 are wound around each pulley, and the rotational force of one belt is transmitted to the other belt.

11 To assemble and set up the above transmission mechanism in the manufacturing department of conductors, etc., insert two bearings into the rotating shaft, fit two pulleys onto both ends of the rotating shaft, and tighten the screws. do. Next, the outer rings of the two bearings are supported on a support using fixtures, but since there are nine separate parts, such as two pulleys, two bearings, and a rotating shaft of the required length, there are nine separate parts. Assembling these components takes about 1 hour, and since accurate parallelism between the rotating shaft and the bearing is required, the holes must be machined with good accuracy when installing the fixtures, which is surprisingly difficult. Simple 11: It's not easy. In addition, what is called a pulley bearing is commercially available in which a bearing is attached to a pulley with a P116 component ball, and this is shown in FIG. In the figure, a bearing 3 is attached to a pulley 1, into which a central shaft 7a is fitted and fixed for free rotation with a +l ring 7b. The method of using a pulley bearing is to fix the center shaft to a support 5 using a fixture 4 and rotate the pulley, and the structure is such that the center shaft cannot be used for force transmission. It cannot be used as is.

[Problems to be solved] In order to solve the difficulties in assembling the rotational force transmission mechanism using the belt described in [-], we have developed a method that can be easily performed on site by reducing the number of parts as much as possible. It is desirable to do so. It is an object of the present invention to provide an integrated pulley shaft bearing IJing mechanism and a coupling mechanism used therewith, which will improve the efficiency of assembling such a rotational force transmission mechanism.

[Means for Solving the Problems] The present invention has a pulley rotated by a belt, a rotating shaft that transmits the rotational force of the pulley, and an inner ring of a bearing that pivotally supports the rotating shaft, and an outer ring of the bearing. A mechanism that can be fixed to a support by a mechanism, and a coupling part is provided at the tip of the rotating shaft, and the coupling part is coupled to the coupling part of the rotating shaft of a companion mechanism fixed to a common base to generate rotational force. It is possible to configure a transmission mechanism.

The coupling mechanism for the above is a mechanism in which the inner ring of a bearing that supports the rotary shaft of an appropriate length is integrally formed with the rotating shaft having the above-mentioned coupling portions H at both ends, and can be fixed to a support by the outer ring of the bearing. (Installed in the middle of two sets of integral mechanisms of pulley shaft bearings of letter L installed on the common base, identifying the outer ring of the bearings to the above common base and connecting the rotating shafts of the above integral mechanisms on both sides. A rotational force transmission mechanism can be constructed by using the following.

In the above-mentioned joint portion, the tip of each rotating shaft is formed to have an 11-circular cross section.

[Function] The integral mechanism of the pulley shaft bearing according to the configuration described in +1 is a component in which the pulley, its rotating shaft, and the inner ring of the bearing that pivotally supports the rotating shaft are integrally formed, and this is a component that fixes the outer ring of the bearing. Then, the 91 unit will be a pulley with a bearing (pulley bearing).
It can be used as In addition, when configuring a rotational force transmission mechanism, two sets of this integrated mechanism are arranged, and the outer ring of each bearing is screwed into a common base using an identification tool, and the cross section formed at the tip of the rotating shaft is゛i
It is easy to assemble the circular parts by overlapping them and joining them together.

Next, - the action of the above-mentioned coupling mechanism is such that when the distance between the pulleys is large and the length of the rotating shaft of the integral mechanism is insufficient, the coupling mechanism is interposed between the two sets of integral mechanisms. Connect each rotating shaft in the same way as in Section 11-1 and extend it to the required length. In the coupling mechanism, the inner ring of the bearing is integrally formed with the rotating shaft, and is screwed to a common base using the same fixing tool as described above.Assembling is fm't' and the spacing of the pulleys can be freely changed. It is something that can be done.

[Embodiment] FIG. 1 is a sectional view in the axial direction and at right angles thereto, showing the structure of an embodiment of the integrated mechanism of the pulley shaft bearing according to the present invention. In the figure, a rotary shaft 2 is integrally formed with a pulley 1. The manufacturing method may be to cut from one cylinder or to make them separately and screw them together. The diameter of the pulley shall be of the various diameters required. Next, the surface of the rotating shaft is processed to form the inner ring 8a of the bearing. A bearing ball 8c is fitted into this, and an outer ring 8b is fitted thereinto to form a bearing 8. A mounting hole 8d is provided in the outer ring. The method for assembling the bearing on the rotating shaft in this manner is similar to the method for manufacturing the pulley bearing explained in FIG. 5, and can be easily realized on-site as a part. In short, ↑
For example, in a pulley bearing, the pulley 1 is fixed to the rotating shaft 2, the bearing 3 is moved to another location, and its outer ring is used for fixation. Next, the tip of the rotary shaft 2 is shaped into a circular cross section to form a joint portion 2a.

Since the joint part has a Fm'lj structure with circular butts, alignment of the rotating shafts on both sides does not need to be very precise, and a slight misalignment is allowed, making adjustment easy. However, depending on the magnitude of the rotational force to be transmitted, as shown in the figure, only the diameter d' of the joint part should be replaced by the diameter d' of the rotating shaft.
It may also be made larger than the diameter d. Also, the length l is 1
Since there are multiple bearings, there should be no risk of sideways vibration.

By setting the diameter and length of the joint part in this manner, it is possible to stably transmit a considerable amount of rotational force. It should be noted that the integrated mechanism according to l- below can be used as it is as the above-mentioned pulley bearing, but in that case, a connecting part is not required.

FIG. 2 is an axial cross-sectional view showing the structure of an embodiment of the coupling mechanism according to the invention. In the figure, at both ends of the rotating shaft 2' there are formed connecting portions 2a similar to those marked ①, and at the center of the rotating shaft an inner ring 9a of a bearing similar to that marked F is formed. The bearing 9 is constituted by the bearing balls 9c and the outer ring 9b. 9d is a mounting hole. The length 12 of the rotating shaft is determined to be a necessary length corresponding to the distance between the pulleys on both sides.

FIG. 3(a) shows a rotational force transmission mechanism in which two sets of integrated mechanisms 8 in FIG. The fixture is fixed to the support 5 by screws 11-. Depending on the case, it is also possible to directly fix it to a support without using a fixture. The two rotating shafts 2-1, 2-2 are connected by abutting each other at their connecting portions 2a, and the rotation of one pulley is transmitted to the other.

FIG. 3(b) shows a rotational force transmission mechanism constructed by interposing the coupling mechanism 9 of FIG. 2 between the integral mechanism 8 of FIG. 1, and the outer ring 9b of the bearing of the coupling mechanism is Screw on fixture 4! 1, and each joint portion is butted against each other. When the distance between the pulleys is large, the length 12 of the rotating shaft is determined according to the distance.

[Effects of the Invention] As is clear from the above explanation, in the side of the pulley shaft bearing integrated machine according to the present invention, the pulley, its rotating shaft, and the inner ring of the bearing are integrally formed, and the bearing is assembled as a #11 body. It can be used as a Boo 9- with attached. When assembling the rotational force transmission mechanism, all that is required is to attach the outer ring of the bearing to a support directly or via a fixture. In addition, when the pulleys have a large interval, they can be easily connected by using the coupling mechanism of this invention, contributing to the efficiency of work by assembling the rotational force transmission mechanism, and has excellent applicability as a component. There is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of an embodiment of the pulley shaft bearing integral mechanism according to the present invention, and FIG. 2 shows the structure of a coupling mechanism according to the present invention that connects the pulley shaft bearing integral mechanism of FIG. 1. The cross-sectional view, FIG. 3(a), shows the first
FIG. 3(b) is a sectional view of a rotational force transmission mechanism constituted by the integral mechanism of the pulley shaft bearing shown in FIG. 1, and FIG. Fig. 4 is a sectional view of a conventional rotational force transmission mechanism, and Fig. 5 is a sectional view of a conventional rotational force transmission mechanism.
FIG. 2 is a structural diagram of a pulley bearing. 1... Pulley, 2.2'... Rotating shaft, 3
...Bearing, 4...Fixing tool, 5...
Support, 6... Belt, 7a... Center shaft, 7b... City ring, 8.9... Bearing, 8a, 9a... Inner ring of bearing, 8b, 9b... Bearing. Outer ring, 8c, 9c...bearing ball, 8d, 9d...installation hole.

Claims (3)

[Claims] (1) A mechanism in which a pulley rotated by a belt, a rotating shaft that transmits the rotational force of the pulley, and an inner ring of a bearing that pivotally supports the rotating shaft are integrally formed, and can be fixed to a support by the outer ring of the bearing. , and has a coupling part at the tip of the rotating shaft, and the coupling part can be coupled to a coupling part of a rotating shaft of a counterpart mechanism fixed to a common base to form a rotational force transmission mechanism. , integrated mechanism of pulley shaft bearing. (2) A mechanism in which the inner ring of a bearing that pivotally supports the rotating shaft is formed integrally with a rotating shaft of an appropriate length having the above-mentioned joints at both ends, and can be fixed to a support by the outer ring of the bearing, and a common base is used. The rotary force transmission mechanism is constructed by installing the pulley shaft bearing in the middle of the two sets of integrated mechanisms of the pulley shaft bearings installed in the above, and fixing the outer ring of the bearing to the common base and connecting the rotating shafts of the integrated mechanisms on both sides. A coupling mechanism characterized by the ability to (3) The pulley shaft bearing integral mechanism according to claim 1, or the coupling mechanism according to claim 2, wherein the coupling portion is formed in a semicircular cross section at the tip of the rotating shaft.