JPS604630A - Clutch - Google Patents

Abstract

PURPOSE:To obtain the smooth transmission and easy engagement by allowing a conical roller to be held between a disc having a conical frictional surface on the inside and a polygonal conical cam board having a plurality of projection parts and an arcuate surface. CONSTITUTION:A disc 4 having a conical frictional surface 3 on the inner periphery side is fixed onto a motive shaft 1. Onto the outer periphery of a following shaft 2, a cam board 7 in polygonal conical form which is constituted of several projection parts 5 parallel to the conical frictional surface 3 and a cam surface 6 connecting in arcuate surface form between the projection parts 5 each other is installed in slidable ways in the axial direction through a key 8. Onto the outer periphery side of the cam board, an annular holding device 11 having a conical roller 9 fitted into a pocket 10 corresponding to the cam surface 6 is fitted. The conical roller is returned to the center position in a gradually varying gap 19 formed with the conical frictional surface and the cam surface by the springy force due to the turning displacement of the both edge parts of a spring rod 18, and transmission and engagement are carried-out smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch mechanism that engages and disengages a driving shaft and a driven wheel.

Originally, clutches can be roughly divided into two types: pull-out clutches that engage with teeth, and friction clutches that engage frictionally. It is not suitable for high-speed engagement that involves impact and has a large effect of inertia on the driven body when disengaging, and it is not suitable for high-speed engagement due to the high resistance to release the teeth from engagement during transmission. has drawbacks that require special consideration. On the other hand, friction clutches cannot be said to be reliable in transmitting power, but they cause less shock when engaging and disengaging, and can weaken the effects of inertia, and the sliding stroke of the sliding engager is extremely small, making the locking and unloading mechanism simple. On the other hand, in the case of a friction clutch, there is the inconvenience of having to keep pressing the friction surface to be engaged.
Therefore, it is well known that when a sliding sheath is pressurized by a forked rod, wear and tear on the bottle and the guide groove is considerable.

Therefore, the present invention solves these drawbacks and provides a friction clutch that has the same reliability of power transmission as a removable clutch, can transmit rotation in any direction, and when disengaging, engages to assist the release and release operation. The purpose is to provide a latch in which the combined unit itself returns in the disengagement direction, allowing the clutch to be easily engaged and disengaged with little resistance, and the disengagement mechanism also being simple.

An embodiment of the present invention will be described below with reference to the drawings.

A disk (4) having a conical friction surface (3) on the inner circumference is fixed to the driving shaft (1), and the driven wheel (2) has several convexes parallel to the conical friction surface (3) on the outer circumference. Section (5) (5)...
The cam surface (61 (6)... A polygonal conical (pentagonal in the drawing) cam disk (7) formed in the shape of a cam disk is mounted on a shaft so as to slide left and right through a key (8), and a cam surface (6) is mounted on the outer circumferential side of the cam disk. Correspondingly, fit the annular retainer (b) fitted into the pocket (1ω) with the conical roller (9), and attach the flanges t121afr on both sides of the retainer to the cam disc (
1) Installed on the left and right sides respectively) +131, +14
It is supported on the outer periphery of a sliding body a'71 having a disk α9 and a groove (161) fixed concentrically at 1, and a cam disk (7
) from one end of the protruding strip to the inside of the side, one end of the half bar (IEO) is bent into a U-shape and buried, and the other end is inserted through the flange (121) of the annular retainer (b). do,
Due to the force of the spring rod (due to the rotational displacement of both ends of the fill), the conical roller (91) is formed by the conical friction surface (3) and the cam surface (6) together with the annular retainer (B). An annular retainer (
In addition, springs are installed at several locations inside the cam disc (7), and one end of each spring is connected to the sliding body (17).
A spring adjustment ring screwed into the threaded part +211 of the driven shaft (2) on the inside of the driven shaft (2) allows the spring pressure to be adjusted freely. The lever-equipped fork of the hooking/unhooking device that is linked to the pedal operation or the operating lever is engaged with the lever to slide the polygonal conical cam disc (7) left and right on the driven shaft (2).

In addition, the annular retainer (b) is made of several springs or spiral springs with one end fixed to the cam disk (7) and the other end connected to the annular retainer (b) instead of the spring bar (181). I pulled it,
It may be held so that it returns to a predetermined position.

Figures 1 and 2 show the clutch in the engaged state; when the driving force 1iqlI (1) rotates, its conical friction surface (3) causes the conical roller (91 to
, the annular retainer a9 is slightly rotated with respect to the cam disc (7), and the spring bar (181 is the cam disc (7)). As shown in Fig. 3, the fixing part to the cam surface is tilted from the axial direction of the circumference as a fulcrum, and elasticity is imparted to the circumference. A conical roller (9) is firmly clamped and engaged with the small part, so that the cam disc (7) rotates in the same direction as the disc (4), and power is transmitted from the driving shaft (1) to the driven wheel (2). It is.

However, when the lever-equipped fork (c) is swung in the direction of the arrow in FIG. 1 about point a as a fulcrum in conjunction with the pedal operation or the operating lever, the sliding body t171 springs through the groove that engages with the fork. At the same time as it slides to the right on the adjustment ring, the polygonal conical cam disc (7) and disc 1151 integrally connected thereto also slide to the right along the key (8) of the driven shaft (2). At the moment when the conical roller (9) separates from the conical friction surface (3), that is, at the same time the load on the conical roller (9) by the conical friction surface (3) is reduced, the annular retainer (B) Due to the repulsive restoring force of the applied spring bar to return to its original position, it is slightly rotated with respect to the cam disk (7), and each of the conical rollers (91) is connected to the conical friction surface (3) and cam surface f6+
The conical roller (9
), the conical roller (
Since the pressure on both the conical friction surface (3) and the cam surface (6) of 9) is immediately released, the disc (4) of the driving wheel (1) and the cam disc (7) of the driven wheel (2) The friction transmission is cut off and the clutch is disengaged. In addition, when the spring is pushed forward in the direction of the screw part (211iCG) of the driven wheel (2), the elasticity of the spring is increased, and when it is pushed back, it is decreased and the elasticity of the spring is increased. The force for pressing the drive shaft against the disc side of the driving shaft can be adjusted, and the pressing force between the conical roller (9) interposed on the cam surface (61) and the conical friction surface (3) can be adjusted.

According to this invention, as described above, there is a cam disk between the conical friction surface of the disk on the driving shaft side and the outer surface of the polygonal conical cam disk that is mounted on the driven shaft so as to be able to slide left and right. A gradual gap is formed in which the center position of the cam surface between the convex stripes is at its maximum, and the conical rollers fitted in the pockets of the annular retainer come into contact with the conical friction surface by sliding of the cam disk due to the engagement operation of the clutch. At the same time, the conical rollers move together with the annular retainer in the direction of the gradually changing gap on the cam surface in the direction of rotation, so that the conical rollers are more and more firmly engaged and held by both the conical friction surface and the cam surface. ,
It ensures reliable transmission without worrying about slippage, and can easily engage and transmit rotation in either the left or right direction. Additionally, due to the rotation of the conical rollers and the annular retainer relative to the cam disc when the clutch is engaged, elasticity is imparted to the spring bar, which has one end fixed to the cam disc and the other end inserted through the annular retainer, and the annular retainer Since the force that tries to return the conical roller to the maximum position of the gradual gap is retained through the cam disk, when the clutch is disengaged, the cam disk is slightly slid onto the driven shaft, and the conical roller is moved by the conical friction surface. When the load is reduced, the conical roller automatically returns to the larger position of the gradual gap through the annular retainer due to the elasticity of the spring bar, assisting the clutch's release action, thereby creating a large resistance to disengaging the clutch. The clutch of the present invention has a simple structure and is suitable for high-speed engagement and disengagement, and is suitable for winches and various industrial machines. It is effective as a clutch for a transmission axle, can be used even in oil, and can also be used as a brake, so it has a wide range of uses.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a clutch mechanism embodying the present invention in an engaged state, FIG. 2 is a longitudinal sectional side view of the same, and FIG. 3 is a partially cutaway plan view. (1)... Driving shaft, (2)... Driven shaft, (3)... Conical friction surface, (4)... Disc, (5)... Protruding section, (6)...
・Cam surface, (7n...polygonal conical cam disc, (8)...key, (9)...conical roller, 101...pocket, (b)
・Annular retainer, u2 ・flange, hammered ・groove, 081
・・Spring bar, f191・・Gradual change gap, ■・・Spring, @・・ノ(Ne adjustment item, profit・・Fork with lever.

Claims (1)

[Claims] 1. A disk with a conical friction surface on the inside is fixed to the driving shaft, and the driven shaft has several protrusions parallel to the conical friction surface on the outer periphery, and an arc surface with a large radius is connected between the protrusions. A polygonal conical cam disk is mounted on the shaft, which is wedged so that it can slide left and right, with the cam surfaces equally spaced, and on the outside of the cam disk, conical rollers are placed in each pocket according to the number of cam surfaces. In addition to fitting the retained annular retainer, an appropriate spring is provided with one end fixed to the cam and the other end connected to the annular retainer, and the force of this spring forms a conical roller between the conical friction surface and the cam surface. The annular retainer is controlled so that it moves in conjunction with the center position of the large cam surface of the gradually changing gap,
Furthermore, the compression can be adjusted freely on the drive shaft side by means of springs installed in several places on the cam disk and screwed onto the driven wheel, and a locking device is engaged with a groove provided on the side of the cam disk. A clutch that slides from side to side.