CN2502032Y - Eccentric direct speed-reducing starter - Google Patents

Abstract

The utility model relates to an eccentric direct speed-reducing starter for internal combustion engine, consisting essentially of a DC electric motor, an electromagnetic switch, a unilateral drive, a drive gear and an eccentric end closure. On the condition of keeping the original structure of an engine, the utility model decreases the number of the teeth of the drive gear to realize the increasing of the torque of a starting engine and changes the shape of the eccentric end closure accordingly to make the eccentric end closure coordinate with the position of the starting engine on the original starter. The utility model is beneficial to simplify the structure of the starting engine, increase the torque and making the starting of the starter more reliable. The utility model adapts to the starting devices of varieties of internal combustion engines.

Description

The direct retarding starter of eccentric

The utility model relates to a kind of starter motor of explosive motor, especially the direct retarding starter of being made up of direct current generator, magnetic switch, ratchet, eccentric end cap of eccentric.

Common retarding starter is made up of several parts such as direct current generator, magnetic switch, reducing gear, ratchet, end caps, in order to reach the purpose of slowing down and increasing moment of torsion by reducing gear, the rotating shaft of motor can not be shared with the ratchet positioning shaft, so just must cause rolling up and the increase of gear train of rigid bearing, bearing support, thereby correspondingly increased the starter motor volume and weight, also increased its complexity and manufacture cost simultaneously greatly.High pulling torque when starting for direct current generator can be adapted to, the speed ratio of reducing gear is generally all very big, and simultaneously in order to satisfy the requirement of engine start rotating speed, rotating speed of motor should design very highly, generally should be more than 10000 rev/mins when unloaded.The high rotating speed of motor, add highdensity current of electric, make the commutation of motor increase difficulty, because the existence of the big speed ratio of reducing gear, make the dynamo-electric machine rotation of the anti-tape starting of motor cause the motor fishing line, the danger of driving increases substantially, and in addition, mechanism's requirement of strength of machine shaft is very high.

In sum, common retarding starter has defectives such as complex structure, poor reliability, required precision height, price be more expensive.

The purpose of this utility model is intended to provide a kind of volume eccentric little, in light weight, easy to use, that driving torque is big, requirement on machining accuracy is low direct retarding starter for explosive motor.

The technical solution of the utility model is such: because the starting gear (flywheel ring gear) of explosive motor is subjected to the restriction of motor complete machine size and can not does too greatly, but the size that can not do the number of teeth ratio of big flywheel gear and starter driving gear directly affects the size of starting motor torque and the performance of starter motor electromagnetic power again, make starter motor have high rotating speed, high pulling torque, and it is simple in structure low with reliability height and cost, must correspondingly cancel reducing gear, reduce the number of teeth of starter driving gear simultaneously, and for the starter driving gear that reduces can be coupled with the engine flywheel gear, must change the shape of the circular fixed base of end cap, make it to the reverse translation of engine flywheel direction, thereby the actuation gear that has dwindled can be matched well with flywheel gear.

Compared with prior art, characteristics of the present utility model are:

The starter motor structure is simpler, and moment of torsion is bigger, and reliability is higher, and cost is lower.

Fig. 1 is the direct retarding starter structural front view of eccentric;

Fig. 2 is the A-A sectional view of the direct retarding starter of eccentric;

Below in conjunction with annexed drawings set forth structure of the present utility model and working principle.

As shown in the figure, the utility model includes direct current motor 2, magnetic switch 1, machine shaft 6, unidirectional drive device 4, under the situation of the various parameter constants of motor and starter motor, reduce the number of teeth of starter driving gear 5, starter motor directly slows down, thereby reach the effect of increase to the engine flywheel moment of torsion, so the number of gears of actuation gear 5 must be reduced to 9-5, meanwhile, certainly will dwindle the diameter of actuation gear, like this under the constant situation of the structure of motor, for the actuation gear 5 that makes minimizing can match with the engine flywheel gear, correspondingly reduce the distance between end cap 3 central positions (being motor driving shaft 6) and engine flywheel axial direction, the circular fixed base of end cap 3 with respect to the reverse translation of engine flywheel, also will be changed the position of fixing threaded hole on the end cap 3 to satisfy the requirement of original retaining screw hole site on the flywheel shell of engine simultaneously.

Working principle is as follows: be contained on the engine casing above-mentioned starter motor fixing, end cap 3 is packed in the other ending cover hole of engine flywheel, open magnetic switch 1, starting electrical machinery 2, unidirectional drive device 4 is gone up actuation gear 5 top with the engine flywheel gear along machine shaft 6 and is coupled, and rotates and makes engine start thereby drive engine flywheel.Owing to reduced the number of teeth of actuation gear 5, made that the moment of torsion of starter motor ato unit flywheel is bigger, more reliable.

Claims (2)

1. direct retarding starter of eccentric, it includes direct current motor (2), magnetic switch (1), unidirectional drive device (4), actuation gear (5), machine shaft (6), it is characterized in that: the number of teeth of actuation gear (5) is 9～5;

2. the direct retarding starter of eccentric according to claim 1 is characterized in that: end cap (3) is an eccentric configuration, promptly central point to engine flywheel opposite direction translation certain displacement.

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