KR19990019975U - Overrunning Clutch of Automotive Start Motor - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an overrunning clutch of a start motor for automobiles.

2. The technical problem the invention is trying to solve

Conventionally, since a metal washer is used on the inside of the retainer surrounding the outside of the overrunning clutch as a means for preventing the outflow of grease that is injected for lubrication inside the own running clutch assembly, grease due to lack of airtightness There is a high risk of malfunction due to leakage occurs.

3. Summary of solution of design

In the present invention, the inner race 50 having the pinion 19 for connecting the ring gear to the front end and the shell 25 for connecting the actuating lever 26 connected to the plunger 27 are integrally connected to the rear end. The inner race 50 and the outer race 51 are bound to each other by a seal 60 made of a material having excellent sealing property in order to prevent leakage of grease injected into the overrunning clutch 18 including the outer race 52. It is characterized by intervening between the bent portion 54 of the retainer 53 and the washer 55.

4. Important uses of the devise

By preventing grease leakage, the overrunning clutch can be maintained in a stable state, which can contribute to the improvement of the quality and performance of the start motor.

Description

Overrunning Clutch of Automotive Start Motor

The present invention relates to an overrunning clutch of a start motor for an automobile, and more particularly, to the provision of an improved overrunning clutch to prevent the outflow of grease filled for the purpose of lubrication in the overrunning clutch.

Automotive start motor is a part that supplies the energy required for the first suction and compression stroke for engine start. It operates by applying battery power and rotates the ring gear of the flywheel fixed to the outer end of the crankshaft of the engine. The crankshaft allows the first suction and compression strokes to be carried out.

These start motors control the connection between the driver assembly that rotates the engine's ring gear and the connection between the driver assembly and the engine's ring gear on which the armature assembly receives the rotation force of the armature and the armature assembly that generates the torque to drive the ring gear. It consists largely of solenoids.

The overrunning clutch is inserted on the driver shaft and directly connected to the ring gear of the engine to receive the rotational force of the armature assembly. The role of the overrunning clutch is to connect the ring gear to start the engine and of course occur after starting. It can prevent the reverse rotation and can be connected with the actuating lever connected to the solenoid so that it can slide in the longitudinal direction of the driver shaft.

Conventionally, it is comprised by the washer of the metal ring inside the retainer which surrounds the outer side of the overrunning clutch as a means for preventing the outflow of the grease which is injected for the purpose of lubricating an internal component inside the owner running clutch assembly.

In the conventional art as described above, the washer does not have a certain airtightness, so that the grease injected into the interior is concerned, and in particular, when the wear occurs due to the friction between the washer and the internal parts, the degree of increase occurs.

In such a case, there is a high risk of malfunction of the entire overrunning clutch due to wear of each part and lack of lubricity due to grease spillage, and a great influence on the start motor as a whole.

Accordingly, the present invention has been made to solve the above problems, and aims to maintain stable quality and performance of the start motor by preventing the outflow of grease injected into the overrunning clutch to ensure smooth operation. .

1 is a cross-sectional view of the start motor for explaining the present invention.

2 is a cross-sectional view of the overrunning clutch to which the technique of the present invention is applied.

3 is a cross-sectional view of an overrunning clutch to which the prior art is applied.

* Explanation of symbols for main parts of the drawings

10: start motor 18: overrunning clutch

19: Pinion 50: Inner Race

51: Outrace 53: Retainer

55: washer 60: seal

Hereinafter, the configuration and operation of the present invention will be described with reference to the accompanying drawings.

1 is an overall cross-sectional view of a start motor for explaining the present invention, FIG. 2 is an exploded cross-sectional view of the overrunning clutch to which the technique of the present invention is applied, and FIG.

As shown in FIG. 1, the starter for automobile 10 is an armature shaft 12, an armature core 13, an armature coil 14, and a commutator 15 in the inner center of the armature frame 11. ), A brush assembly 16 and the like, the armature assembly 17 for generating a rotational force is provided.

In front of the armature assembly 17 is composed of an overrunning clutch 18 having a pinion 19, a driver shaft 20, etc. to receive the rotational force of the armature assembly 17 to connect with the ring gear of the engine It has a driver assembly 21 for driving it.

Above the armature assembly 17, the spool bobbin 24 which pulls in and holds the holding coil 23 in the inner side of the case 22 and the rear of the overrunning clutch 18 of the driver assembly 21 in its inner side. It is provided with a plunger 27 for moving the operating lever 26 connected to the shell 25 located in;

A switch cover 30 having terminals 28 and 29 is press-fitted to the rear end of the case 22, and the terminals 28 and 29 are plunger (pushed by the force pushed by the plunger 27). 27) It is a configuration having a solenoid 35 that allows the armature assembly 17 to rotate by contacting the contact disc 32 fixed to the rod 31 provided at the rear.

The operation of the start motor 10 is that when the key is set to the start position, the battery power flows to the pull-in and holding coil 23 to generate a magnetic force and sucks the plunger 27 by this magnetic force.

Then, the actuating lever 26 connecting the phase of the shell 25 located behind the pinion 19 inserted into the driver shaft 20 to engage the pinion 19 with the ring gear of the engine. By the suction operation of the plunger 27, the contact disc 32 contacts the terminals 28 and 29.

At the same time, the current flowing to the pull-in and holding coils 23 flows to the armature coil 14 to rotate the armature assembly 17, thereby operating the engine.

The overrunning clutch 18 inserted into the driver shaft 20 of the start motor 10 as described above has an inner race 50 having a pinion 19 connected to a ring gear at its distal end and a plunger at the rear end thereof. 27 is composed of an outer race 51 having an integrated shell 25 for connecting the operating lever 26 to slide the overrunning clutch 18 slidingly.

The outer race 51 is formed with a wedge-shaped groove, the clutch roller 52 is inserted between the groove and the inner race 50, the clutch roller 52 is interrupted by a spring.

The inner race 50 and the outer race 51 are bound by the retainer 53 and the open side of the outer race 51 is prevented from being separated by the bent portion 54 of the retainer 53. The inner side of the bent portion 54 is closed with a metal washer 55 for preventing the outflow of grease injected for lubrication purposes.

In the related art, the overrunning clutch 18 has abrasion due to the friction between the bent portion 54 and the washer 55, the outer race 51 and the clutch roller 52 of the retainer 53 due to frequent operation. The durability of the overrunning clutch 18 is reduced.

In addition to the metal washer 55, there is no separate grease prevention means, and grease injected for lubrication is often leaked between the gap between the washer 55 and the retainer 53. It has the same problems as one.

In consideration of the above problems, the present invention further includes an airtight means capable of completely blocking the outflow of grease injected into the overrunning clutch 18 to solve problems such as durability degradation that may occur due to the outflow of grease.

As an airtight means for preventing grease leakage, a disk-shaped seal 60 made of a material such as rubber or urethane having excellent sealing property is interposed between the bent portion 54 and the washer 55 of the retainer 53. Try to solve.

The outer end of the seal 60 is to be in the same position as the outer diameter of the washer 55 and the inner diameter end has a diameter smaller than the outer diameter of the recess 61 formed in the rear end of the pinion (19) It is good to maintain the airtightness by the compression force (the force to return to the original diameter) generated.

The present invention as described above is that the grease injected for the purpose of lubrication in the overrunning clutch 18 is leaked by the seal 60 further interposed between the washer 55 and the bent portion 54 of the retainer 53. By being excluded, the durability of the overrunning clutch 18 which arises due to lack of lubricity can be prevented.

The present invention as described above can prevent grease leakage and maintain the overrunning clutch in a stable state, thereby contributing to the improvement of the quality and performance of the entire start motor.

Claims (1)

An inner race 50 having a pinion 19 for connecting a ring gear to the front end of the start motor 10 for starting the engine; and an overrunning clutch 18 connected to the rear end of the starter 10 with a plunger 27. An overrunning clutch (18) composed of an outer race (51) integrally having a shell (25) for connecting an actuating lever (26) for sliding movement and inserted into the driver shaft (20); In order to prevent the outflow of grease injected into the overrunning clutch 18, the bent portion of the retainer 53 which binds the inner race 50 and the outer race 51 to the seal 60 made of a material having excellent sealing property ( 54) and an overrunning clutch of a start motor for a vehicle, characterized by intervening between the washers 55 and 54).