Starter output shaft and processing technology thereof

[0023] The present invention will be further described in detail below in conjunction with the drawings.

[0024] Such as Figure 1 ~ Figure 4 As shown in the figure, 1. planetary gear shaft; 2. output shaft; 3. shunt boss; 501, electromagnetic switch; 502, gear; 503, shift fork; 504, DC motor; 505, planetary gear clutch; 505a, Unidirectional device; 505b, output shaft; 505c, ring gear; 505d, planetary gear; 505b 1 , Output shaft; 505b 2 , Planetary gear shaft.

[0025] The "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or selectively mutually exclusive embodiments with other embodiments.

[0026] In the description of the present invention, the terms "up", "down", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely In order to facilitate the description of the present invention, it is not required that the present invention must be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0027] Such as figure 1 As shown, figure 1 It is a schematic diagram of the output shaft of the starter of the present invention. In this embodiment, the output shaft of the starter includes a plurality of planetary gear shafts 1, wherein the planetary gear shaft 1 is formed at the front end of the output shaft 2; and an output shaft 2 in a cylindrical shape. The shaft 1 and the output shaft 2 are integrated into an integrated structure. In this embodiment, such an integrated structure can effectively eliminate the hidden danger of the planetary gear shaft 1 falling off.

[0028] Preferably, there are 3 or 4 planetary gear shafts 1.

[0029] Such as figure 2 As shown, figure 2 It is a left view of the output shaft of the starter of the present invention. In this embodiment, there are four planetary gear shafts 1 distributed on the coaxial line of the output shaft flange (not shown in the figure). The output shaft 2 is formed on the other end of the output shaft flange, and the planetary gears The shaft 1, the output shaft flange and the output shaft 2 form an integral structure.

[0030] Such as image 3 As shown, image 3 It is a schematic diagram of the forged blank structure of the starter output shaft during the processing process of the starter output shaft of the present invention. The processing technology of the output shaft of the starter includes

[0031] (1) Cutting, that is, cutting by sawing or forging;

[0032] (2) For the first spheroidizing annealing, heat the blank of the output shaft of the starter to 20-30°C above Ac1 (727°C), keep it for a period of time, and then slowly cool down to obtain a spherical shape uniformly distributed on the ferrite matrix;

[0033] (3) Shot blasting to remove surface oxide scale and other impurities to improve appearance quality. Shot blasting is to use high-speed moving shot streams to continuously impact the surface of the strengthened workpiece, forcing the surface and surface of the target to undergo the following changes during cyclic deformation;

[0034] (4) For the first surface treatment, phosphorous saponification or coating of polymer lubricant on the blank of the starter output shaft;

[0035] (5) Forging, forging two or three times;

[0036] (6) For the second spheroidizing annealing, heat the blank of the output shaft of the starter to 20-30°C above Ac1, hold it for a proper time, and then slowly cool it with the furnace, and cool it down to about 500°C.

[0037] (7) Shot blasting again to make the surface of the workpiece reach a certain roughness and make the workpiece beautiful;

[0038] (8) The second surface treatment is to artificially form a surface layer on the surface of the raw material of the output shaft of the starter that is different from the mechanical, physical and chemical properties of the substrate;

[0039] (9) The boss 3 is forged, and the boss 3 is forged in the middle of the output shaft to reduce the forging deformation and is suitable for forging processing;

[0040] (10) Cutting, removing the boss;

[0041] (11) Spline processing, use the spline hob to process the spline shaft milling machine according to the growth method;

[0042] (12) Quenching treatment, heating the blank of the output shaft of the starter to an appropriate temperature and keeping it for a period of time, and then immersing it in the quenching medium for rapid cooling;

[0043] (13) Grinding and forming, using an abrasive tool to cut off the excess material on the blank of the output shaft of the starter for forming.

[0044] Such as Figure 4 As shown, Figure 4 It is the left view of the forged blank of the starter output shaft during the processing process of the starter output shaft of the present invention. In this embodiment, four planetary gear shafts 1 are formed by the starter output shaft processing technology, and the output shaft and the output shaft flange are concentric circular shafts; at the same time, the boss 3 is forged in the middle of the output shaft to make The forging deformation is reduced, which is suitable for forging processing.

[0045] Therefore, in the actual processing, the shunt forging method is used to change the structure of the blank, that is, a boss 3 is added in the middle of the blank of the output shaft of the forging starter. The specific structure is as Figure 4 As shown, the forging deformation is reduced, which is suitable for forging processing, and then the boss is removed by the machining method to process products that meet the product characteristics. The main processes are as follows: blanking (saw or forging) → first spheroidizing annealing → shot blasting → first surface treatment (phosphorus saponification or coating with polymer lubricant) → forging (2 times or 3 times) → first Secondary spheroidizing annealing → second shot blasting → second surface treatment → boss forging → cutting → spline machining → product quenching → grinding, etc. This solution solves the forging forming of the planetary gear shaft 1, greatly improves the processing efficiency, and reduces the processing cost.

[0046] To sum up, the improved structure of the output shaft of the starter changes the output shaft from the existing split structure to the integral structure. The output shaft is changed from the split structure to the integral structure and the product performance is stable. The hidden danger of planetary gear shaft falling off; at the same time, in terms of processing technology, the material distribution boss is added to reduce the forging deformation, so that the planetary gear shaft on the output shaft is suitable for forging. The forging method is used to process the integral output shaft, and the split forging principle is used to increase The material diverging boss makes forging processing feasible, greatly improving processing efficiency and reducing product processing costs.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be implemented Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution of the present invention, shall be covered by the scope of the claims of the present invention.