JPS598024Y2 - reversible clutch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a clutch, and more specifically to a reversible clutch.

The clutch, which is an element that transmits the rotational force of the driving shaft to the driven shaft, is a dog clutch that actively engages by engaging teeth, or a dog clutch that makes pressure contact between surfaces and uses the friction between them. It can be roughly divided into friction clutches that perform engagement, and the latter type of friction clutch can be expected to operate more quickly unless the rotation of the main drive shaft is extremely high, and it generates friction on the contact surface so that the contact surface slips when starting with engagement. Since the driven shaft can be accelerated gradually, there is no impact, and even if a certain amount of resistance is generated on the driven shaft, the contact surface will slip and excessive load will not be caused by parts being separated. They can be classified into disc clutches, conical clutches, and circumferential clutches depending on the type of contact friction surface.

However, regarding reversible clutches that selectively connect two driven shafts to a main drive shaft in accordance with the reversible rotation of the main drive shaft, there are a few examples of the above-mentioned friction clutch type, but the structure is complicated. There are few that can be put to practical use in small devices.

This invention aims to eliminate the above-mentioned drawbacks, and its characteristics are that the boss of the driven wheel (described later) fits into both sides of the wheel body, which has a rim with grooves on the outer circumferential surface. A pair of bearing bosses having a concave portion and protruding outward from the rim, and a circular arc having a center at a position dividing the outer periphery of the boss into a plurality of equal parts are connected to the rim inner wall and between the boss and the rim. The outer wall of the guide body is shaped so that a plurality of independent substantially tortoise-shaped roller grooves are provided around the boss in opposite directions on each side of the main driving wheel, and a plurality of roller grooves are arranged in the roller grooves. The main drive is mounted on one surface of the ring body, which has a cylindrical roller mounted on the boss, an annular roller presser plate mounted on the boss, and a rim each having a groove on the outer circumferential surface and a plurality of protrusions on the inner circumferential surface. It consists of a driven wheel with a protruding boss for a bearing that fits into a recess of the wheel, and a roller holding plate and a driven shaft are arranged on both sides of the main driving wheel with rollers interposed between them, and one of the main driving wheels is To provide a reversible clutch in which one driven wheel rotates following the rotation of the main driving wheel, the other rotates idly, and the other driven wheel rotates following the rotation of the other main driving wheel, and the one driven wheel idles. It is something.

An embodiment of this invention shown in the drawings will be described in detail below.

FIG. 1 is an exploded perspective view of the reversible clutch of this invention, which is composed of a main driving wheel 1, rollers 2, a plurality of roller retaining plates 3, a plurality of driven wheels 4, and a shaft 5, each of which will be described later. .

The main driving wheel 1 has a wheel body 13 having a rim 12 with a groove 11 formed on its outer periphery, as shown in FIGS. 2a, l) and 3.
A pair of bearing bosses 15 (indicated by broken circles in FIG. 3) have recesses 14 on both sides of the rim 12 and protrude outward from the rim 12, and a point a1 that divides the outer periphery of the bosses into three equal parts. ~a3
The rim inner walls 121 to 123 have a circular arc having a center at
And by shaping the outer walls 161 to 163 of the guide body 16 integrally connected between the boss 15 and the rim 12, one end is slightly wider than the diameter of the roller to be described later, and the outer walls 161 to 163 of the guide body 16 are integrally connected between the boss 15 and the rim 12. Three independent approximately tome-shaped roller grooves 17 that gradually become narrower are provided in opposite directions on each side, and three locking pins 1 are provided on the boss 15 for locking a roller holding plate to be described later.
It has a structure in which numeral 8 is implanted, and numeral 19 in the figure is a shaft hole.

As shown in FIGS. 1, 5, and 6, the roller 2 is composed of a cylindrical body 21 having a diameter slightly smaller than the wide side width of the roller groove 17 described above and approximately equal to the height of the boss 15. ing.

As shown in FIGS. 1 and 5, the roller presser plate 3 has a hole 31 with a diameter slightly smaller than the inner diameter of the rim 12 and the same diameter as the recess 14.
The annular body 33 has three pin insertion holes 32 having a diameter slightly larger than that of the locking pin 18 at the same position as the locking pin mounting position.

As shown in FIGS. 1 and 5, the driven wheel 4 has a rim 44 having a groove 41 on its outer periphery and a semicylindrical protrusion 43 on its inner circumferential surface 42 at positions dividing the length of the inner circumferential surface into three equal parts. It has a structure in which a bearing boss 46 that fits into the recess 14 of the main drive wheel 1 projects from one surface of a wheel body 45, and 47 in the figure is a shaft hole.

The reversible clutch of this invention is made up of the above-mentioned parts, and as shown in FIGS.
The roller retaining plate 3 was placed on the boss 15 so that the locking pin 18 was inserted into the pin insertion hole 32, and the boss 46 of the driven wheel 4 was placed in the recess 14 of the boss 15. After that, the shaft 5 is inserted into the shaft holes 19, 47, and each of the above-mentioned components is moved in the axial direction by a bearing pusher 62, which is attached to the mounting board 61, and a bearing arm 63, which is attached to the mounting board. The main driving wheel 1 is installed so as not to spread out, and is connected via a V-belt hung between the V-groove 11 and a V-pulley (not shown) attached to the output shaft of a prime mover capable of reversible rotation. The driven wheel 4a is connected via a V-belt that is hung between the V-groove 41 and a V-pulley attached to the input shaft of the driven machine that transmits rotational force in the normal rotation direction when the main driving wheel rotates in the normal direction. The other driven wheel 4b is connected via a belt hung between the groove 41 and a pulley attached to the input shaft of the driven machine that transmits rotational force in the reverse direction when the main driving wheel reverses. are connected.

The operation of the reversible clutch of this invention is shown below in Figures 6a and l.
) will be explained in detail.

As shown in FIG. 6a, the roller 2, which was in the position indicated by the broken line, is moved to the narrow side of the roller groove 17 by the protrusion 43 of the driven wheel 4a, which is not yet connected, as the main driving wheel 1 rotates counterclockwise. The rollers move due to the physical action of mechanical and centrifugal force, and these rollers bite into and frictionally connect between the outer walls 161 to 163 of the guide body 16 of the main driving wheel 1 and the rim inner circumferential surface 42 of the driven wheel 4. The driving wheel 4a rotates in the same counterclockwise direction as the main driving wheel 1.

Next, when the main driving wheel 1 rotates in the clockwise direction as shown in FIG. It is pushed toward the solid line position and enters the groove formed by only the outer walls 161 to 163 of the guide body 16 at the solid line position, and the main driving wheel 1 and the driven wheel 4a are no longer held together and the space between them becomes free. .

The above operation is the relationship between the main driving wheel 1 and one of the driven wheels 4a, and the other driven wheel 4b becomes free when the main driving wheel rotates counterclockwise, and is free when the main driving wheel rotates clockwise. It is frictionally connected to the main drive wheel and rotates in the same clockwise direction as the main drive wheel.

As mentioned above, this invention has a wheel body having a rim with a groove formed on its outer circumferential surface, and a pair of wheels that has concave portions on both sides of which the bosses of the driven wheels (to be described later) fit, and that protrude outward beyond the rim. The inner wall of the rim and the outer wall of the guide body connected between the boss and the rim are shaped to have a bearing boss having a center at a position dividing the outer circumference of the boss into a plurality of equal parts. A main driving wheel having a plurality of independent approximately toe-shaped roller grooves arranged in opposite directions on each surface around the periphery, a cylindrical roller disposed in the roller groove, and an annular roller mounted on the boss. A bearing boss that fits into the recess of the main driving wheel is projected from one surface of the wheel body, which has a roller holding plate and a rim having a V groove on the outer circumferential surface and a plurality of protrusions on the inner circumferential surface. A roller holding plate and a driven wheel are arranged on both sides of the main driving wheel with rollers interposed between them, so that one of the driven wheels rotates following the rotation of one of the main driving wheels, and the other rotates idly. However, since the other driven wheel rotates to follow the rotation of the other of the main driving wheels, and the one driven wheel can idle, one of the two driven wheels can be selectively followed by the reversible rotation of the main driving wheel. Therefore, two different driven members can be driven by a power source capable of reversible rotation, the structure can be simple and compact, and accurate switching operations can be performed.

[Brief explanation of drawings]

The figures all show one embodiment of this invention; Fig. 1 is an exploded perspective view of the reversible clutch, Fig. 2 a is a perspective view showing the structure on one side of the main drive wheel, and Fig. 2 b is the same. FIG. 3 is a plan view showing the configuration of both sides of the main driving wheel; FIG. 4 is a perspective view of the assembled state as a reversible clutch;
Figure 5 is a sectional view of the state installed on the bearing, Figure 6a,
1) are operation explanatory diagrams. 1... Main drive wheel, 11, 41... V groove, 12, 44... Rim, 13, 45...
... ring body, 14 ... recess, 15, 46 ...
...Boss, 16...Guide, 17...
... Roller groove, 18 ... Locking pin, 19, 47
...shaft hole, 2 ... roller, 3 ...
・Roller presser plate, 4... Driven wheel, 42...
・Inner peripheral surface, 43...protrusion.

Claims (1)

[Scope of utility model registration request] A pair of bearing bosses that have concave portions on both sides of a wheel body having a rim with grooves formed on its outer circumferential surface into which the bosses of the driven wheels described below fit, and that protrude outward from the rims, and the outer periphery of the bosses. By forming the inner wall of the rim and the outer wall of the guide body connected between the boss and the rim to have an arc having a center at a position dividing the portion into a plurality of equal parts, a plurality of independent substantially tomb-shaped parts are formed around the boss. a main driving wheel having a plurality of roller grooves arranged in opposite directions on each surface; a cylindrical roller disposed in the roller groove;
An annular roller presser plate attached to the boss, and a wheel body having a rim having a groove on its outer circumferential surface and a plurality of protrusions on its inner circumferential surface are fitted into the recess of the main driving wheel. It consists of a driven wheel with a protruding boss for a bearing, and a roller holding plate and a driven wheel are arranged on both sides of the main driving wheel with rollers interposed between them, so that when one side of the main driving wheel rotates, one of the driven wheels rotates. A reversible clutch characterized in that one of the driven wheels rotates to follow the rotation of the main driving wheel, the other of the driven wheels rotates idly, the other driven wheel rotates to follow the rotation of the other of the main driving wheels, and the one of the driven wheels can idle.