JPS62266229A - Rotation control device - Google Patents

Abstract

PURPOSE:To reduce the abrasion of a bearing due to the excessive-speed rotation by allowing steel balls to be removed from a truncated cone face when the rotating speed of a drive member exceeds. CONSTITUTION:When the rotating speed of a drive member 1 exceeds the predetermined rotating speed N, steel balls 7 are moved in recessed grooves in the radial direction of the drive member 1 by the centrifugal force. But the steel balls are guided to the left against the tensile force of a spring 8 via the slant bottom face of the recessed groove 6 of a truncated cone face 4 and are removed from the left end of the recessed groove 5 of the first truncated cone face 3, then a driven member 2 is rotated relatively to the drive member 1 together with the steel balls 7. That is, when a rotary machine such as a generator reaches the predetermined rotating speed N, it is cut off from the drive member 1 to block the rotation at an excessive speed. Accordingly, the excessive rotation of the rotary machine is prevented, and the excessive energy consumption and the abrasion of a bearing can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotation control device. More specifically, the present invention relates to a rotation control device that is attached to a rotating device such as a generator that is rotatably mounted on a rotating shaft connected to a drive source.

Previous technology and its problems Patent Application No. 1987-297.971 (December 28, 1985)
Japanese Patent Application) discloses a rotation control device that is attached to a generator or the like driven by an automobile engine. The device of this invention is effective in preventing overspeeding of the generator and reducing energy loss and damage to bearings and the like. However, since the rotation control device of the present invention is equipped with a clutch made of a friction plate such as an asbestos sheet, a considerable amount of time and labor is unavoidably consumed in replacing consumables and maintaining and inspecting the clutch.

OBJECT OF THE INVENTION The object of the present invention is to provide an economical system that can be attached to rotating equipment such as an automobile generator that is connected to the output shaft of an engine through a belt-driven continuously variable transmission to withstand long-term use and simplify maintenance and inspection. The purpose of this invention is to obtain a rotation control device.

The above object of the present invention is to provide a rotation control device that is attached to a rotating device that is rotatably mounted on a rotating shaft that is connected to a drive source, the rotation control device including a cylinder that is coaxially attached to an end of the rotating shaft. a driving member having a first truncated conical surface whose diameter gradually decreases on the outer periphery of the end thereof; a passive member having a second truncated conical surface opposite and parallel to the first truncated conical surface; a respective truncated conical surface at mutually opposing points on the first and second truncated conical surfaces; A steel ball is fitted into a pair of concave grooves bored in the generatrix direction of the surface, and a steel ball is disposed in a cavity defined between the driving member and the passive member, and one end is attached to the end wall of the rotating device. This is achieved by the rotation control device of the present invention, which is characterized in that it is equipped with a spring whose opposite end is brought into contact with each steel ball.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the apparatus of the present invention will be described below with reference to an embodiment shown in the accompanying drawings.

Referring to FIG. 1, a rotating passive shaft 11 with a driving member 1 attached to the right end, and a rotating device such as a generator rotatably mounted on the rotating passive shaft 11 (see FIG. (not shown) is shown attached to the end wall 9.

The passive shaft 11 is driven by an output shaft (not shown) of an engine via a belt-driven pulley 15 attached to the right end of the drive member l. Reference numeral 13 indicates a screw for attaching the pulley 15 to the drive member 1, and reference numeral 14 indicates a fan blade for cooling a generator or the like attached to the outer periphery of the boot IJ15.

The device 10 of the present invention includes the driving member 1 and the driving member 1.
a passive member 2 disposed concentrically outside with a predetermined gap from the outer periphery of the driving member 1; It consists of two steel balls 7 and a spring member 8 inserted between the end wall 9 and each steel ball 7. The driving member 1 is a passive shaft 11
It consists of a cylinder fixed coaxially to the right end of the truncated conical surface 3 (
(hereinafter referred to as the first truncated conical surface).

As shown in FIG. 2, the first truncated conical surface 3 has a plurality of pieces (in the figure, 4 ) grooves 5 are provided. The drive member 1 is provided with a leg portion 17 adjacent to the left end and on the outer periphery of which a bearing 16 is seated. The passive member is a tubular portion 2T that extends outward from the drive member 1.
The inner diameter of the tubular portion 2T is made considerably larger than the outer diameter of the driving member 1, and the inner diameter of the tubular portion 2T and the driving member 1
A cavity 12 is formed between the outer surface of the The passive member 2 is provided with a second truncated conical surface 4 arranged parallel to the first truncated conical surface 3 at a predetermined distance from the right end of the tubular portion 2T.

As shown in FIG. 2, the second truncated conical surface 4 is provided with the same number of concave grooves 6 arranged in the same manner as the first truncated conical surface 3 and cut in the generatrix direction. and four grooves 5 provided on the outer periphery of the first truncated conical surface 3.

When the four grooves 6 of the second truncated conical surface 4 are placed in positions facing each other, the four pairs of grooves (5a, 6a)
, (5b, 6b)% (5c, 6c).

A steel ball 7 of a predetermined size is fitted into each of (5d, 6d), drivingly connecting the first and second truncated conical surfaces. The bottom surfaces of the grooves provided in each of the truncated conical surfaces 3 and 4 are parallel to the respective truncated conical surfaces.

A spring 8 is inserted into the cavity 12, and its left end is brought into pressure contact with an end wall 9 that is attached to a rotating device, and its right end is brought into pressure contact with each of the four steel balls 7. An adjusting mechanism such as a screw is provided to adjust the tension of the spring 8 as necessary. During operation, the drive pulley 15 and the drive member l rotate at a predetermined rotation speed (
For example, when rotating at a speed lower than 3000 rpm, each steel ball 7 has both grooves (5a, 6a), (5b16b), (5c
, 6c), (5d.

6d), the driving member 1 transmits torque to the passive member 2 and rotates rotating equipment such as a generator at the same speed as the driving member 1. However, when the number of revolutions of the driving member 1 exceeds the predetermined number of revolutions N, each steel ball 7 moves in the groove in the radial direction of the driving member 1 due to centrifugal force. It is guided to the left by the inclined bottom surface of the groove 6 against the tension of the spring 8, and separates from the left end of the groove 5 of the first truncated conical surface 3.
The passive member 2 rotates together with the steel ball 7 relative to the driving member 1. That is, when a rotating device such as a generator reaches a predetermined rotation N, it is cut off from the drive member 1 and prevented from rotating at an excessive speed. When the rotation speed of the passive shaft 11 decreases by a predetermined value N, the steel ball 7 is returned to the groove 5 of the first truncated conical surface 3 by the spring 8, and the driving member 1 transmits torque to the passive member 2. .

Effects of the Invention The effect of the device of the present invention is that it not only prevents overspeed rotation of rotating equipment, reduces excessive energy consumption and wear of bearings, but also prevents the drive member 1. By manufacturing the passive member 2° and the steel ball 7 that connects these two members using a metal material with high layer resistance, an economical rotation control device that improves durability and facilitates maintenance and inspection can be obtained. It is something that can be done.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing the device of the present invention, and FIG. 2 is a sectional view taken along the line π-π in FIG. 1 driving member 2 passive member 3 frustoconical surface 4 frustoconical surface 5 concave groove 6 concave groove 7 steel ball 8 spring member 9 end wall 10 attached to rotating equipment
Device of the present invention 11 Rotating passive shaft 12 Cavity 13 Mounting with screws 14 Fan blade 15 Pulley 16 Bearing 17 Strap portion

Claims (1)

[Claims] A rotation control device that is attached to a rotating device that is rotatably mounted on a rotating shaft connected to a drive source, and consists of a cylinder that is coaxially attached to the end of the rotating shaft, and has a diameter on the outer periphery of the end. a drive member having a tapering first frustoconical surface;
It consists of a tubular body of a predetermined size that is attached to the end of the rotating device and extends outside of the drive member, and has a second truncated conical surface facing and parallel to the first truncated conical surface on the inner surface of the end. a passive member, a steel ball fitted into a pair of concave grooves bored in mutually opposing points on the first and second truncated conical surfaces in the generatrix direction of each truncated conical surface, and the driving member. A rotating device characterized in that the spring is disposed in a cavity defined between the member and the passive member, and has one end in contact with the end wall of the rotating device and the opposite end in contact with each steel ball. Control device.