SU4260A1 - Safe start-up handle - Google Patents

Description

The proposed safe start-up is intended for automotive, tractor, etc., lightweight internal combustion engines and has as its goal, without complicating the handling and reducing reliability, as compared with an ordinary starting handle, to prevent the engine from hitting the handle backwards.

FIG. 1 handle depicted in longitudinal section; in fig. 2 - front view of the handle with a partially open cover.

The sleeve 1 of the handle, the passage through the frame of the car or tractor with its cylindrical part, is attached to the frame by a flange and two bolts. At the front, the sleeve has a box for the ratchet mechanism, closed by a cover 2. Inside the sleeve 1, a bronze sleeve 5 is pressed in, in which the ratchet wheel 4, having a cylindrical box at the front, rotates. In the latter is placed the ball bearing bearing, closed in front

steel ring 6 so that it does not recede or become frustrated when the shoulder of the handle 7 leaves. The sleeve 7 of the handle 7 and the ratchet wheel 4 are cut right inside and screwed onto the hollow screw inside which the coupling roller 9 runs. Between screw 8 and the roller 9 has a tongue / 5 preventing the rotation of the roller relative to the screw 8 and allowing it to move easily along the screw. At the rear end of the roller 9, a clutch 10 is engaged, engaging with a similar one sitting at the end of the main motor shaft. At the front end of the said roller there is a head with a knurled surface intended for assembly, namely: by gripping it and turning it to the right, you can screw a hollow screw sitting on the key on the key into the ratchet 4, and that the latter does not rotate at the same time fixed at this time specifically for this

designed clamping screw 11, passing through the tide to the cover of the ratchet box. In the ratchet box, around the ratchet wheel there are six dogs 12 arranged in such a way that they enter the clutch one by one. This is done in order to minimize the dead stroke of the ratchet mechanism, and thereby minimizes the danger of a back stroke.

The arm of the handle 7 is connected to the coupling roller 9 not tightly, as is done with an ordinary automobile crank, and in such a way that between them there is the possibility of two mutual relative movements. The first is the movement of the roller along its axis inside the core screw on the key. When it moves toward the motor, clutch 10 engages with the motor shaft, and when it moves in the opposite direction, clutch disengages. The second is the rotational movement of the handle arm along helical cutting, which is harmful and unacceptable when the motor is started up and is useful and necessary only during a backlash, as it prevents the danger of the latter.

When the handle is rotated to the right, the shoulder with its chopped head will be screwed onto the hollow screw, will approach the ball bearing and, through it, will press the ratchet wheel. Since friction in balls will always be less than in cutting between a screw and a ratchet wheel, the latter, remaining in place, will suspend further screwing of the shoulder, i.e. Between them there will be a tightening, like between a nut and a lock nut. Thus, the relative rotational movement between the shoulder and the hollow screw, and consequently, the coupling roller sitting in it on the key, will stop, and the mechanism will then act as a simple clockwork handle, plant motor. The ratchet dogs jump at this time along the teeth of the ratchet wheel, rotating with the roller and screw to the right.

In the event of a kickback, the resulting force will tend to turn the coupling roller in the direction opposite to that in which the driver’s hand rotates, i.e. to the left side, and now, when the roller rotates to the left, the pawns, resting on the teeth of the ratchet wheel, stop the latter, and the roller with the screw 8 mounted on it will be screwed into the fixed ratchet wheel. The arm of the handle will remain at rest, since it is already unrelated to the screw rotating at the moment, the former connection from tightening is disturbed by the fact that one of the components of this connection — the ratchet wheel — has become fixed. Screwing will continue until the roller, which is carried along by the rotating screw, disengages from the motor shaft.

The subject of the patent.

A safety knob is safe using a ratchet mechanism that eliminates the back stroke of the engine, characterized in that the coupling roller 9 with the key 13 can slide in the sleeve 8, provided inside with a keyway and outside - with a screw thread, which is included in the same cutting in the sleeves ratchet wheel 4 and handles 7.

to patent R. S. KOVRLEVSKY No. 4260