Mold for fabricating starting gear in gear-reduction starter

A starting gear and starter technology, applied in the field of machinery, can solve the problems of poor mechanical performance of the starting gear, low utilization rate of raw materials, and low service life, and achieve the effects of stable performance, ingenious structural design, and long service life.

Active Publication Date: 2012-10-10
YUHUAN PUTIAN UNIDIRECTIONAL DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are the following defects in the production of starting gears using the above-mentioned manufacturing method: 1. The diameter of the bar required for production is relatively large, that is, the requirements for the raw materials required for production are relatively high, which inevitably increases the cost of the required raw materials; 2. The middle part of the bar Being cut into waste, there is obviously a low utilization rate of raw materials, which also causes a waste of resources; 3. The production efficiency of gear processing machine tools is low, that is, the required production cost is high; 4. The starting gear processed by this method Gears also have the problems of poor mechanical properties and low service life

Method used

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  • Mold for fabricating starting gear in gear-reduction starter
  • Mold for fabricating starting gear in gear-reduction starter
  • Mold for fabricating starting gear in gear-reduction starter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 and figure 2 As shown, the starting gear in the deceleration starter includes a cylindrical body 1, the outer side of the body 1 has a convex shoulder 1c and several straight teeth 1d evenly distributed in the circumferential direction, and the inner side of the body 1 has a concave shoulder 1b and several teeth. Helical teeth 1a evenly distributed in the circumferential direction. The body 1 is made of alloy structural steel material, and the alloy structural steel is 20CrMo or 20Cr.

[0035] The manufacturing method of the starting gear in the deceleration starter mainly includes blanking, cold extrusion and surface treatment steps. Specifically, according to the materials used for making the starting gear, it is determined that the reduction of area should be controlled to be 81%-88% in the cold extrusion step, and the preferred value of the reduction of area is 84%-85%.

[0036]Select the bar stock that adopts the required material of making sta...

Embodiment 2

[0044] Such as Figure 6 As shown, the structure and principle of the present embodiment are basically the same as those of the first embodiment, except that the other end of the pressing rod 74 directly abuts against the pressing plate 72 . The pressing sleeve 75 is directly fixed on the mold base 71 .

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Abstract

The invention provides a mold for fabricating a starting gear in a gear-reduction starter, belonging to the technical field of machines. The mold solves the problems that the existing starting gear has high requirements on raw materials, the utilization ratio is low and the production cost is high. A method for fabricating the starting gear in the gear-reduction starter comprises the following steps of: blanking, phosphorization and saponification treatment, cold extrusion forming and surface treatment. The mold for fabricating the starting gear in the gear-reduction starter comprises a lower mold and an upper mold. The lower mold is provided with a mold cavity which corresponds to the external structure and the position of the starting gear one to one. The upper mold comprises a pressing rod and an external pressing sleeve assembly. One end of the pressing rod is arranged in the external pressing sleeve assembly and is axially and fixedly connected with the external pressing sleeve assembly. The other end part of the pressing rod is provided with a groove. The fabricating method has the advantages of raw material saving and low production cost. The fabricating mold has the advantages of stable performance, convenience in use and long service life.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a deceleration starter, in particular to a method for manufacturing a starting gear in the deceleration starter. The invention also relates to a mold for making the starting gear in the reduction starter, which also belongs to the technical field of machinery. Background technique [0002] The deceleration starter is a starter with a gear reducer between the armature shaft of the starter and the drive gear. It converts the electrical energy of the battery into mechanical energy in the car starting system, and then starts the engine. The gear reducer of the deceleration starter has three different forms: external meshing type, internal meshing type, and planetary gear type. The starting gear is one of the most important parts in the reduction starter. [0003] The starting gear of the deceleration starter includes a cylindrical body made of metal material. The outside of the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02
Inventor 吴树建
Owner YUHUAN PUTIAN UNIDIRECTIONAL DEVICE CO LTD
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