SU1361367A1 - Manual starting mechanism for internal combustion engine - Google Patents

Abstract

The invention improves the durability of the manual trigger mechanism. For this, a safety coupling 10 with gland springs 11 is housed in housing 1 and made in the form of a ratchet wheel 12, rigidly 15 mounted on a shaft 8, a bearing disc 13 mounted on an axis 14 of a cover 2, and hinged on axles 15 fixed in eyelets disk 13, the latch. The catenary of the latter has a tooth and bevels that interact with the protrusions 21 of the pulley 3. The latch tooth is meshed with the teeth of the ratchet wheel 12. After starting the engine, gear 6 is disengaged from the intermediate gear. Tooth wheels 12 slip on the latches 16, pushing them in the radial direction. When overloaded, the clutch 10 is activated. In this case, the springs 11 are compressed and the protrusions 21 of the interactions are. with the bevels of the latches 16. The latter are thus disengaged from the wheel 12, thereby protecting the parts of the device from overload. 3 il. (L oo 05 CO O5

Description

The invention relates to downgrading, in particular to starting devices activated by muscular force.

The purpose of the invention is to increase the reliability and durability of the manual start mechanism.

Figure 1 shows the manual start mechanism for an internal combustion engine; FIG. 2 is the same longitudinal section; on fig.Z - section aa on fig, 2,

The manual start mechanism for an internal combustion engine includes a housing 1 with a cover 2, a pulley 3 with a starting cord 4 and a return spring 5, and a drive gear 6 with an open screw groove 7 mounted on the shaft 8 with a leading pin 9, safety clutch 10 with compression springs 11 housed in housing 1 and made in the form of a ratchet wheel 12 rigidly mounted on the shaft 8, a support disk 13 mounted on the axis 14 of the kryppka 2, and pivotally mounted on the axles 15 fixed in the eyes of the support disk 13, latches 16, each of which has a tooth 1 7 and bevels 18 and 19, the support disk 13 and the pulley 3 are provided with projections 20 and 21, respectively, between which gland springs 11 are placed, the bevels 18 and 19 of the latches 16 interact with the projections 21 of the pulley 3, and the teeth 17 of the latches 16 engage with the teeth 22 ratchet wheel 12. The return spring 5 at one end is fixed on the pulley 3, and the other with the pin 23 is fixed on the kryppke 2.

The start cord is connected at one end to the pulley 3, and its other end is led outside the housing 1 and is provided with a start handle 24. The manual start mechanism is fixed on the carriage 25 of the flywheel of the engine being started. On the housing 1 is fixed brake element 26 in contact with the hub of the drive gear 6.

The mechanism works as follows.

When the starting cord 4 is pulled out by the starting handle 24 on the pulley 3, a torque is generated which is transmitted from the protrusions 21 made on the pulley 3 by the pressing springs 11 to the projections 20 made on the supporting disk 13. At this moment the projections 21 the action of the pre-compressed springs 11 abuts against the bevels 19 of the latches 16 and keeps them in alignment with the ratchet wheel 12. Thus, through the latches 16 fixed to the lugs of the support disc 13 by means of the axles 15, the torque is transmitted to the ratchet wheel 12 rigidly established a shaft 8, the pulley 3 and the supporting disk 13 rotate around the axis 14, return spring 5 to swirl, .hrapovoe wheel 12 with the shaft 8 is rotated in the bearings of the housing 1

5 and the engine flywheel carriage cover 25 mounted on the drive shaft 8, the pin 9 moves along the screw slot 7 of the drive gear 6 and moves it to the left (FIG. 2). Gear 6

0 engages with an intermediate gear (not shown), which is permanently engaged with the flywheel (engine) crown. From turning on the shaft 8, the gear 6 holds the brake element 26. After the gear 6 has been put into engagement with a jerk, the starting cord 4 is unwound, together with the flywheel of the engine, a rotary motion. After starting the engine when

0, the rotational motion is transmitted already i from the flywheel of the engine to gear 6, the latter, moving with a screw groove 7 on the pin 9, disengages from the intermediate gear. At this point in time, the ratchet wheel 12 rotates with greater frequency than the pulley 3 and the bearing disk 13, therefore the teeth of the ratchet wheel 12 slip through the latches 16, pushing them apart in the radial direction, which eliminates the overload in the manual start mechanism.

If an overload in the proposed mechanism does occur (for example ,.

5 when the handle is too sharply jerked, when the blow is reversed, etc.), the safety clutch 10 is activated. In this case the pressure springs 11, installed between the projections 21 and 20, respectively, of the pulley 3 and the support disk 13, compress the protrusions 21 of the pulley 3 begin to interact with the bevels of 18 latches 16, the latter at the same time coming out of engagement with the ratchet

5 wheel 12, thus protecting the parts of the device from overload.

When the release handle 24 is released, the return spring 5 begins to unwind, the pulley 3 rotates and 5

0

0

Mats on the start cord 4. The device is ready for the next start, the engine.

The proposed technical solution makes it possible to increase the reliability and durability of the starting mechanism, so that when the safety clutch is triggered, the return spring is not warped, which eliminates the uneven distribution of the load over the width of the spring coil, moreover, the parts of the safety clutch do not experience axial displacements. the dimensions of the device in the axial direction.

Formulas of the invention

A manual start mechanism for an internal combustion engine, comprising a housing with a bolt, a pulley with a starting cord and a return spring, a drive gear with an open screw groove mounted on the shaft With a driving pin, and a safety coupling with pressure springs, which is that, in order to increase reliability and durability, the safety clutch is made in the form of a ratchet wheel rigidly mounted on the shaft, a support disk and pawns mounted on the support disk of latches with a tooth and bevels, and the supporting disk and the pulley is provided with protrusions, between which gland springs are placed, the bevels bevels are made to interact with the pulley projections, and the teeth of the latches are hooked with the teeth of the ratchet wheel.

hertz

23

/five,

19 21

sixteen

21

20

15

2f 19

Editor H, dumb

Sost avitel V.Chekmazov

Tehred M. Khodanich Proofreader-A.T sko

Order 6210/39 Circulation 504Subscription

VNRSHPI State Committee of the USSR

for inventions and discoveries: 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Fig.Z

Claims (1)

Claim Manual start mechanism for an internal combustion engine, comprising a housing with a cover, a pulley with a start cord and a return spring, a drive gear with an open screw groove 5 mounted on a shaft with a drive pin, and a safety clutch with compression springs, characterized in that , in order to increase reliability and durability, the safety clutch is made in the form of a ratchet wheel, rigidly mounted on the shaft, a support disk and latches with teeth and bevels pivotally mounted on the support disk, 15, wherein the support disk and the pulley are provided with protrusions between which the compression springs are placed, the bevels of the latches are adapted to interact with the protrusions of the pulley, and the teeth of the lock are engaged with the teeth of the ratchet wheel.