SU35504A1 - Kulachkovoy clutch - Google Patents

Description

Of the cam and friction clutches that are commonly used in industry, the first ones have the disadvantage that when they are carelessly turned on, they are often broken, and the installation of the clutches is not always possible according to the overall conditions. Switching off (disengaging) the cam clutches requires great efforts.

With the aid of the proposed coupling, it is proposed to eliminate the above-mentioned drawbacks of the ordinary type of cam clutches by replacing the sliding friction with a rolling stroke. To this end, the clutch cams are made in the form of roller or ball bearings, which make it possible to significantly reduce the required force when uncoupling on the move against conventional cam clutches and to achieve safe separation of the clutches by means of a spring.

In FIG. 1 shows a section through an ABC coupling in FIG. 2; FIG. 2 is a view along arrow LE in FIG. one; FIG. 3 is a section along ab in FIG. one; FIG. 3 is a view along arrows C7, I and / in FIG. one.

The clutch consists of two halves 1 and 8. Half of the clutch has the shape of a toothed disk with a series of nests of a rectangular profile located around the disk (Fig. 4, arrow view (488)

not O). The disc is freely mounted on a bronze bushing 15 worn on the shaft 18.

The second half of the coupling 8 has the form of a cross (Fig. 2), loosely mounted on the sleeve 5, which sits on the main shaft 18 on two keys 6, fastened to the shaft with screws 13. bearing the cams, made in the form of rollers to replace the sliding friction with rolling friction. As the rollers can be used in ordinary ball bearings of 10 appropriate sizes. The inner rings of the ball bearings 10 are clamped between the rings 11 (FIGS. 1, 2 and 3). The ball bearings of the movable cross 8 with the clutch are included in the corresponding socket of the disc (half of the coupling) 1.

The transfer of rotation from the shaft 18 to the freely movable half of the clutch sitting on it is carried out by the following device. At right angles to the above-mentioned roller platforms, the movable half of the coupling 8 has two radial protrusions (Fig. 2), at the ends of which the boxes 17 are reinforced. The sleeve 5 also has two radially located protrusions with reinforced

at their ends, columns 16, provided with guide grooves for balls 9 placed between columns 16 and the walls of boxes 17.

From the longitudinal movement, the sleeve 5 is held on one side by the shoulder of the main shaft, on the other by the disk 1 of the coupling and the stop rings 7 and 14.

Between the disk 1 and the crosspiece (half of the coupling) 8 there is a helical spring 3, which presses the crossbar 8 to the said ring 14 on the main shaft 18; In order to prevent the spring from twisting, as the disc 1 rotates, the spring sits in the brass guide sleeves 2 and 4.

Clutch coupling is made on a quiet run and can be manual and automatic; the release is made on the run by the spring 3. The reverse structure can also be applied, i.e. the spring will engage the clutch and the machine disengages. Thus, the sliding friction is replaced by rolling friction in the clutch, whereby axial forces for coupling and disengaging the clutch are negligible as compared to an ordinary cam clutch, which can be seen from the following approximate calculation.

Denote by

M-torque on the coupling shaft,

R-average radius of couplings,

g - the radius of the main shaft,

F-gain for tripping on

the course of the proposed coupling, FI is the same for an ordinary cam coupling,

p is the sliding friction coefficient of 0.15 (steel for steel), and A is the coefficient of rolling friction 0.0015.

Then for the proposed coupling

1- for cam

. (f + f) ..

Ber for this clutch ratio is 5,

as a minimum, and inserted digital; s data, we get

-. -

one

200

{+)

four . 0.15

those. To disengage the proposed clutch on the fly, an effort is required ten times less than when disengaging a similar cam clutch, which gives ease of control of the clutch and reliability of its operation.

The subject matter of the invention.

Claims (3)

1. The cam clutch with cams on the movable half of the clutch and the corresponding depressions — on the stationary half using a spring between both halves, characterized in that in order to replace the sliding friction by rolling friction, the cams are made in the form of rollers rotatable on radial axes mounted on the frontal surface of the movable half of the coupling, which half and the shaft carrying it transmit to each other the rotation through the balls placed between the radial projections of this half of the coupling and the radial projections rigidly mounted on the same shaft bushings. 2. The form of the coupling under item 1, characterized in that as the cams, made in the form of rollers, used ball bearings 10, the inner rings of which are rigidly mounted on the axis 12, 3. The form of execution of the muffle according to Claim boxes 17, mounted on the ends of the radial protrusions of the movable half of the coupling.