KR101337953B1 - Remanufacturing method for bush of starter - Google Patents

Abstract

The present invention secures the through-hole to the management dimension by using a boring device for the damaged bushing to support the pinion inside the front bracket, and made a female thread using a tab in the through hole, there is a pre-fabricated male thread By combining the replacement bushings with screws on the front bracket, the number of remanufactures is infinite, unlike the method of shaving bushes for conventional dimension management, and the production cost of remanufactured products is remarkable by increasing the recycling rate of remanufactured bushes. The purpose of the present invention is to provide a method for remanufacturing a bushing for a starter motor.

To this end, the present invention comprises the steps of forming a through-hole larger in size by using a boring device in the non-uniformly worn bush; Forming a female thread using a tab on an inner circumferential surface of the through hole; And it provides a method for re-manufacturing the bushing for the starter motor comprising the step of fastening the replacement bush is formed with a pre-made male thread to the female thread formed bush.

Motor, Bush, Front Bracket, Thread

Description

Remanufacturing method for bush of starter

The present invention relates to a method for remanufacturing a bushing for a starter motor, and more particularly, to remove a worn bush, to form a through hole larger than a conventional dimension, and to make a screw thread therein. The present invention relates to a method for remanufacturing a bushing for a starter motor, by maintaining a conventional bushing dimension.

In general, an automobile engine cannot start by itself, so the first crankshaft must be turned by an external force to cause the engine to explode and rotate the engine for the first time, and this is the starting device.

The starting device includes a starting motor for generating torque for engine cranking, a battery for providing driving power for the starting motor, an ignition switch for applying battery power to the starting motor, and the like.

Here, the starter motor is a component that provides rotational force to the flywheel of the engine. When the operator operates the ignition switch to the start position, the battery power is applied to the starter motor, and the starter motor supplied with the battery power starts to rotate. As a result, the rotational force of the starting motor is transmitted to the ring gear of the flywheel, and the engine is started while the flywheel and the crank shaft are rotated.

As shown in FIG. 3, the starter motor 100 installed to start an automobile engine includes an armature 102 in the motor housing 101 and a planetary gear in the axis line of the armature 102. Ring gears, planetary gear shafts and pinion shafts 106 coupled to the shafts are installed, and the pinion shafts 106 have an overrunning clutch 107 and a pinion gear for preventing overrun of the starting motor 100 after the engine is started. It is comprised by installing 108 respectively.

The starter motor 100 operates the pinion gear 108 forward and backward with the magnetic switch 109 installed on the upper side, and is engaged or disengaged from the ring gear of the flywheel, and is driven by the pinion gear 108. Therefore, the engine is to be started.

However, in case of starter motor, if it is used for a certain period of time, abrasion occurs in the bush of the starter motor made of copper, and noise, which is the main cause of the claim, is generated, and the amateur and the yoke wear out by the dimensional change caused by bushing wear. This damages the starting motor.

Such worn starter motors must be replaced with new ones. Due to problems such as the age of the car and the price of parts, remanufactured products are not widely used. Therefore, the starting motor is basically simple in structure, limited in main wear parts (bush, brush, etc.) and easy to re-manufacture. Therefore, it should be used again when the wear is not greatly progressed through the dimensional control of the worn part. .

However, since the starting motor remanufactured in this way is not uniformly worn at the time of the initial core state, when the starting motor is replaced with a remanufactured part, it may cause the clam due to the noise, and the remanufactured This results in a significant drop in the durability of the starting motor.

In addition, if a remanufactured part is produced through a method such as polishing for dimensional management according to the existing method, wear occurs so that it can not be remanufactured again after using the remanufactured part, so that only one remanufacturing is required. If the degree of wear is severe, the peripheral accessories, i.e., the pinion, may be severely damaged, resulting in lower productivity and increased costs.

The present invention has been made in view of the above, as the through-hole to secure the through-hole to the management dimension by using a boring device for the damaged bushing to support the pinion inside the front bracket, using a thread in the through-hole tab After manufacturing, the replacement bushing with a male thread manufactured in advance is screwed to the front bracket using a screw, so that the number of remanufactured bushes is infinite. The purpose of the present invention is to provide a method for remanufacturing a bushing for a starter motor that can significantly reduce the production cost of remanufactured products by increasing the recycling rate.

The present invention for achieving the above object is a step of forming a through-hole larger in a certain size by using a boring device in a non-uniformly worn bush;

Forming a female thread using a tab on an inner circumferential surface of the through hole; And

And a step of fastening a replacement bush in which a male thread acid is formed in advance to the bush in which the female thread acid is formed.

In a preferred embodiment, the male thread acid of the replacement bush is characterized in that the iron material.

As a more preferred embodiment, the rotation cross groove is formed on the upper end of the replacement bush, it is characterized in that the rotation by using the rotation cross groove by the rotation means to be fastened.

As described above, according to the method for remanufacturing the bushing for the starter motor according to the present invention, after removing the worn portion of the bush, forming a through hole larger than the existing dimension, the thread is processed inside, and separately By replacing the manufactured replacement bushing, the existing bushing dimensions can be maintained.

In addition, if the bush is worn in a certain part, the front bracket can be replaced with a replacement bush without having to touch it. Therefore, unlike the method of directly cutting the bush for dimensional management, the number of possible remanufacturing is infinite.

In addition, in the existing remanufacturing method, the degree of abrasion is severe and the front bracket is discarded to increase the recycling rate of the remanufacturing core, which showed low recycling rate, thereby significantly reducing the production cost of remanufactured products. The claim for remanufactured products can be reduced.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a process diagram showing a method for remanufacturing a bushing for a starter motor according to the present invention, and FIG. 2 is a perspective view showing a replacement bushing according to an embodiment of the present invention.

In order to re-manufacture the starting motor 100, the main parts of the starting motor 100 must be disassembled.

However, since the front bracket 10 portion having the bush 11, which is a target component for application of the present invention, can be dismantled separately from the disassembly of other components, the disassembly process of other components is omitted, and the front bracket 10 is omitted. The dismantling process will be described first.

First, in order to disassemble the front bracket 10, after removing the two through bolts on the rear bracket side and removing the magnetic switch 109, the yoke, the amateur 102 and the overrunning clutch 107 are easily separated. The front bracket 10 which is a target part of the invention can be dismantled.

In the inner side of the dismantled front bracket 10, the part of the bush 11 worn by the pinion 108 is secured to the management dimension by using the primary boring equipment, and then, the tab is used. To make a female thread.

Subsequently, the bushing 12 is a series of processes in which a replacement bush 12 having a male thread 14, which is manufactured in advance, is joined to the front bracket 10, which is made in the previous step, using a screw by a bolting method. Remanufacture.

At this time, by forming the rotation cross groove 15 in the upper end of the replacement bush 12, by rotating the rotation cross groove 15 by the rotating means through the replacement bush 12 worn through the bush 11 It is easy to fasten to the hole (13).

Here, the size of the starter motor 100 and the bush 11 is different according to the vehicle type, and accordingly, the dimensions of the bush 11 are also different. Therefore, if the replacement bush 12 is mass-produced and supplied for each dimension of the front bracket 10, it is possible to re-manufacturing for all models regardless of the vehicle type. In addition, since the replacement bush 12 simply needs to be replaced with the front bracket 10, the work speed can not be compared with the present, and productivity can be increased even with fewer personnel.

The material of the replacement bushing 12 may be selected from the existing copper series in consideration of the strength of the pinion and the front bracket 10, and the Susannasan 14 portion may be iron-based, and the inner through hole 13 may be copper. It can be determined by the heterogeneous materials of the series.

As a method of attaching the bush 11 to the front bracket 10, a screw joint may be used in the same manner as a bolt and a nut.

As described above, the bush 11 remanufacturing method of the present invention removes the worn portion of the bush 11, forms a through hole 13 larger than the existing dimension, and processes the internal thread in the inside to separately prepare it. By replacing one replacement bush 12, the existing bush 11 dimensions can be maintained.

In addition, when the bushing 11 is worn in a certain part, the front bracket 10 may be replaced with a replacement bushing 12 without having to touch it, and thus, unlike the method of directly cutting the bushing for dimensional management, the number of possible remanufacturing is possible. Is infinite.

In addition, since the degree of wear is severe in the existing remanufacturing method, the front bracket 10 may be discarded to increase the recycling rate of the remanufacturing core, which showed a low recycling rate, thereby significantly lowering the production cost of the remanufactured product. Claims for remanufactured products due to reduced durability can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

1 is a process chart showing a method for remanufacturing a bushing for a starting motor according to the present invention;

2 is a perspective view showing a replacement bushing according to an embodiment of the present invention;

3 is a configuration diagram showing the configuration of a conventional starting motor.

<Description of the symbols for the main parts of the drawings>

10: front bracket 11: worn bush

12: replacement bush 13: through hole

14: male thread 15: rotating cross groove

Claims (3)

Forming a through hole in the non-uniformly worn bush by using a boring device to a larger size. Forming a female thread using a tab on an inner circumferential surface of the through hole; And And a step of fastening a replacement bush in which a male thread is formed in advance to the bush in which the female thread is formed. The method according to claim 1, The male thread of the replacement bushing is a steel material, characterized in that the bushing for the starting motor. The method according to claim 1 or 2, Rotating cross groove is formed on the upper end of the replacement bush, the manufacturing method of the bushing for the starting motor, characterized in that the rotation by means of the rotation cross groove by the rotation means.

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