SU491241A3 - Freewheel clutch - Google Patents

Description

The wedge mechanism (see Fig. 3) contains two helical cylindrical irugs 21 and a support plate 22. Springs 21 are placed in a glass 23, the internal cavity of which is provided with guides 24 and 25 for orientation of the springs, and the blind end of the glass interacts with the roller.

The support plate also contains two rods 26 v (27 - for better fixation of the spring.

Drive and clutch are as follows:

The impact on the fork controlling the drive (not shown) through the control sleeve // and the spring 13 causes the drive to move to the right (see Fig. 1) so that gear 4 engages the flywheel of the engine being started (not shown) .

If, with the electric motor turned off, the engagement did not occur (the teeth abut against the ends), the fork continues to push the control cuff evenly, compressing the spring until the electric motor turned on by the same fork begins to rotate. When the motor rotates, the gear wheel engages with the flywheel of the engine being started due to the action of the compressed spring and the screw thread on the sleeve.

Thereafter, the engine gear prevents the rotation of gear 4 and the driven ring 5 associated with it, while the drive wheel 3 under the action of the electric motor tends to rotate in the direction of arrow a (Fig. 2).

Therefore, the rollers 19 are wedged between the curvilinear surface 18 and the driven ring associated with the gear. After starting the engine, gear 4 tends to rotate faster than the starter motor.

The gear begins to rotate in the opposite direction to the sleeve, as a result of which the rollers move in the direction of arrow a. The drive and driven rings are being decoupled, and the starter electric motor no longer rotates when the engine starts, although gear 4 remains in engagement with the flywheel until the fork returns to its original position.

In the proposed drive, the springs are housed in a glass, the blind end of which rests on the roller. Thanks there is a uniform pressure on the generator.

roller, even if the latter tends to move with a bias due to irregularities on the surfaces with which it is in contact. At the same time, there is no need to use oval-shaped springs, which improves manufacturability, since cylindrical springs are easier to manufacture.

Subject invention

1. Freewheel, for example, a starter motor for an internal combustion engine, containing drive and follower rings, respectively connected to the drive shaft

and a starter gear, and a wedge mechanism with rollers, each of which interacts at least with two parallel springs, characterized in that, in order to increase its reliability and

the manufacturability of the coupling, the springs are placed in a glass, the blind end of which rests on the roller.

2..1 a lining of io p. 1, characterized in that the inner cavity of the cup is provided with guides for orienting the springs.

Aa

L, 22

aae and e and p iid .- -

ll liipl ii 4 - :; - ::;: - ± .ВЙ,;

2d

, four