TWI222501B - Method for making a planetary gear set of an automatic gear box and product made by same - Google Patents

Abstract

This invention provides a method for making a planetary gear set of an automatic gear box and product made by same. The method includes the steps of casting, gear forming, and steps of forming washer placement plane and an axial bore of the planetary gear. The casting step casts a rack and a disc as an integral unit. The rack and the disc are each formed a washer placement plane for two odd-shaped washers at corresponding locations. The step of forming washer placement plan forms the washer placement planes. The step forming an axial bore of the planetary gear forms an axial bore of the planetary gear. The planetary gear set includes a rack having plural support posts, a support post supported by the rack and a disc integrally cast to the rack. The rack and the disc are defined with a washer placement plane for an odd-shaped washer between the washer placement plane and each of the two posts. Each of the washer placement planes for an odd-shaped washer is provided with a washer placement plane projecting from the disc surface and the rack surface. A chamfered region is joined defined by the washer placement plane and each of the washer placement planes to facilitate machining of the plane or the placement planes for odd-shaped washers, and to facilitate the integral casting of the planetary gear set of an automatic gear box with odd-shaped washers, to facilitate machining of the plane or the placement planes for odd-shaped washers, to reduce the manufacturing cost, to enhance the structural safety, and to enhance the balance performance.

Description

1222501 V. Description of the invention (1) [Field of the invention] The present invention relates to a method and product for manufacturing an automatic transmission planetary gear holder with the effects of reducing manufacturing costs, improving structural safety, and improving dynamic balance performance. [Description of Know-how] Planetary gear sets are widely used in vehicles, ships, aerospace and other transportation tools, as well as industrial machinery, robots, and other products. Planetary gear sets mainly play the role of power transmission and speed change. The structure of a general planetary gear set includes planetary gears, sun gears, ring gears, and planetary gear seats. Parts include washers, needle rollers, bearings, and so on. The planetary gear seat is the main body of the planetary gear set, which can be divided into two parts: the carrier and the disk seat. The planetary gear is installed between the carrier and the disk seat. Washer is placed between the planetary gear and the carrier or the disk seat. Washer's function is mainly to prevent the relatively hard planetary gears from directly abrading the carrier and the disk seat, which will cause the entire planetary gear set or system to fail. Therefore, the flatness of the washer placement area of the planetary gear seat and the amount of clearance after the planetary gear is assembled directly affect the smooth operation of the planetary gear. The washer shape of a general planetary gear set is designed as a circular or square symmetrical shape. As shown in the first figure, on the disk base 11 of the planetary gear base 1, the planetary gear base washer placement area 111 has an arc shape for the arc-shaped washer (not shown in the figure) to be placed; Referring to the second figure, if the washer is square, the planetary gear seat 2 on the disk seat 21, and the planetary gear seat washer placement area 211 is a square for the square washer to place. The shapes of the washers placement areas 111 and 211 of the above two planetary gear seats can be manufactured by integral casting when the planetary gear seats 1 and 2 are manufactured.

1222501 V. Description of the invention (2), and then use a circular end mill to process the plane of the planetary gear seat washer 111. If the number of planetary gears is even, the planetary gear seat can be processed by broaching. The plane of the company's placement area 211 is used to control the flatness of the plane and the amount of clearance after the planetary gears are assembled. However, under special considerations, the washer design of some planetary gear sets has an asymmetrical profiled appearance. Refer to the third figure. If the washer (not shown) has a special shape (unshaped), the planetary gear seat On the disc seat 31 of 3, the washer placement area 3 11 of the planetary gear seat also has a special appearance. This shape is difficult to be manufactured by integral casting and then processed by end milling or broaching. The corresponding position of the bracket (not shown in the figure) also has a washer placement area, which will have the same problem; therefore, for the manufacturing method of the planetary gear seat 3 with a shaped washer, a two-piece type is required. Design, as shown in Figures 4 and 5, the manufacturing method includes a two-piece powder sintering step 41, a combining step 42, a processing step 43, and the like; the powder sintering step 41 is a process in which the carrier 31 of the planetary gear carrier 3 and The disc base 32 is manufactured separately to form the planetary gear base 3 with high accuracy. In this way, the planetary gear base 3 is placed in the Washer placement area 311, and no further machining is required to control the flatness and the gap amount after the gears are assembled. , And the bonding step 42 is made by brazing The bracket 31 and the disk seat 32 are integrated into a single process. In addition, the processing step 4 3 is performed to form the planetary gear shaft hole 3 2 1 to install a planetary gear (not shown in the figure). However, the manufacturing cost of this method is relatively increased, because the manufacturing cost and mold cost of powder metallurgy are much higher than the general casting process. In addition, although powder metallurgy can form precision planetary gear holders, it is difficult to make integrally formed planetary gear holders with similar and complex shapes, and it must still be divided into brackets and disk holders.

Page 7 1222501 V. Description of the invention (3) _ The two parts are sintered separately, and then the combination method adopted by Jiang is special; it is combined together, and the overall manufacturing cost is quite high. The synthesis cost is also so high [Summary of the invention] Therefore, the object of the present invention is to provide an efficient automatic transmission planetary gear holder manufacturer h, and to reduce the test cost. Another object of the present invention is to provide a mountain lift An automatic gearbox with balanced performance, equal power, octagonal structure and appetite, and the effectiveness of this temple is effective. Therefore, the automatic gearbox lever hole magpie wheel seat of the present invention. Contains the manufacturing method of casting & ox absorptive phase constellation carousel in sequence and carrying out a sequence of steps: working steps, step of washing and placing plane processing, casting, heart: step. The casting step is to form the bracket and the disk base, and form a two-shaped washer at the position corresponding to the bracket and the disk base. The step is to process the shaped washer placement plane; # 星 轮轴 一 托加 二 一Λ boat is used to process the shaft of the star gear. The planetary gear seat includes a 3-disk seat on the bottom surface. A through hole is provided in the center of the bracket, and in the bracket two, most of the pillars are downwardly protruding, and the cross-section of these pillars is frame-shaped. The tray seat is connected by the pillars of the bracket, and is formed as a single entity with the enlightenment, and the tray seat is defined between each of the two pillars and the bracket ^ f. And, the center of the tray seat is provided with a shaft hole coaxial with the through hole of the bracket, and the tray seat and the bracket have a washer projecting on the surface of the tray flat in each shaped washer placement area. $ " Haiwas placement plane center has a planetary gear car hole, and at the same time, an escape angle zone is defined between the Wasser placement plane and the two pillars.

^ 22501 V. Description of the invention (4) District design, avoiding processing: = force: dead angle, plane processing of Lihuasi placement plane, fine control of flatness and clearance of Wasi placement plane, so The design makes the integrated casting manufacturing method reduce the manufacturing cost, improve the structural safety and increase t 1. The effect of the dynamic balance performance of the enemy [Detailed description of the preferred embodiment] In order to understand the purpose and efficacy of the present invention, a α,, is hereby referred to the preferred embodiment of the present invention. The sixth, seventh, and eighth illustrations, and the illustrations in this post are as follows: The manufacturing method of the seat includes, in order, the step of scale making 61, the processing of the tooth profile; 62, the step of placing and flattening the gear, and the step 64 of processing the gear shaft. . This casting step 6] 疋 and the tray seat 52_body casting molding, the center opening of the bracket 51 'hole inner diameter is processed by the rack as an input and output shaft power transmission? Also, the bottom surface of the bracket 51 is radiated with a plurality of pillars 5 I ff and the like, and the end surfaces of the pillars 511 of the bracket 51 are approximately T-shaped. The pan library 52 is connected by the pillars η of the bracket 51, and is connected to the bracket 5 as a single entity, and a special washer is placed between the pan seat 52 and the bracket 51 between every two pillars 511. An area 520 is provided, and a shaft hole 521 coaxial with the through hole 51 of the bracket 51 is provided in the center of the disk base 52 as a space for placing a sun gear (not shown in the figure). The rack 51 corresponding to each of the shaped washer placement areas 52 has a washer placement plane 522 protruding from the surface of the tray seat 52 for the washer 7 to be placed (only the washer of the tray seat 52 is shown in the figure) Placement plane). In addition, the disk seat 52 is further designed with an appropriate weight reduction groove 524 ′, which can effectively obtain the entire planetary gear seat 5 and better.

Page 9 ^ 250!

ΛΑ balance performance performance can reduce the workload of checking dynamic balance. The tooth profile processing step 62 is to process the tooth profile 525 of the bracket 51 and the disc base 52. Only the disc base tooth profile 5 25 is shown in the figure) for the system torque transmission. At the same time, the Washer placement plane processing step 63 is to process the special-shaped Huahua placement plane 522 of the tray seat 52 and the washer placement plane of the bracket 51; because the corner seat placement plane 522 of the tray seat 52 and the bracket are processed 51 The two pillars 5 and 11 jointly define an escape area 523. With the design of the escape angle area 523, the washer plane 522 of the tray seat 52 and the washer plane of the trailer 51 (not shown in the figure) The flatness of) = processing; thereby controlling the flatness and clearance amount of the washer placement plane 522 of the tray seat 52 and the + set placement plane of the bracket 51. The step 6 4 ′ of the planetary gear shaft hole is directed to the planetary gear shaft holes 5111, 52 2 1 of the bracket 51 and the disk holder 5 2 for the planetary gear (not shown) to be seated. Therefore, when the planetary gear seat 5-body casting is completed, as long as the end = knife is used to process a plane for the + place 7 placement on the washer placement plane 522 of the disc seat 52 and the bracket 51, Placing plane 522 and two pillars 511 = there is an escape angle area 5 23, which can avoid the machining dead angle of the processing tool, and is conducive to the plane processing of the plane 5 22. In this way, the automatic transmission planetary gear seat 5 of the present invention has the following functions: 1. Reduce manufacturing and mold costs: The present invention allows processing tools by designing an escape area between the plane and the two pillars Avoiding the dead angle of processing, so that the planetary gear seat with the special-shaped washer placement area can still be integrally formed ^

Page 101222251 V. Description of the invention (6) = Manufactured, which can effectively reduce the manufacturing cost; At the same time, the sintering method of the material / mouth Meng sintering needs to be divided into two parts, and the molds of powder metallurgy, and powder metallurgy molds The price is also much higher than that of the casting mold :: formula. Therefore, the present invention has the effect of reducing the cost and the cost of the mold and the cost of the mold. The completeness of women in k ,,, and mouth: In terms of powder metallurgy sintering materials for structural use, powder metallurgy materials are mostly low-strength, low-duty materials. The tensile strength of general carbon steel powder metallurgy is 12.6 ~ 40Kgf / mm2, and its elongation is between '', + 7% ~ 0.5%, although the tensile strength of high-strength carbon steel powder metallurgy material is 2 ~ 66Kgf / · 2, but its elongation is below 5% Even though the high-tensile tensile strength of nickel alloy, iron / copper alloy and iron / nickel / copper / molybdenum alloy can reach 49 ~ 137Kgf / mm2, its elongation ^ is below H% Q. For casting materials, The tensile strength of spheroidal graphite cast iron is 38 ~ 82 Kgf / mm2, but its elongation can reach more than 7% when the tensile strength is 51Kgf / mm2 or less, even if the tensile strength is 82Kgf / mm2 Above 2%, the tensile strength of Vos tempered black cast iron (ADI) is 92 ~ 143 Kgf / _2, and its elongation ^ can reach more than 4% when the tensile strength is below 122Kgf / mm2, even if the tensile strength is When it is 143Kgf / mm2, its elongation is ^ 1% or more. Therefore, the performance of the overall mechanical properties is still better with nodular cast iron and Vos tempered nodular cast iron, so the choice of materials is still more flexible with cast materials' and the structural safety can be effectively improved. Improving the dynamic balance performance of the planetary gear seat: Refer to the seventh figure, by setting the appropriate weight reduction groove 524 size

Page 11 1222501 V. Description of the invention (7) and position can effectively obtain better dynamic balance performance of the overall planetary gear seat, and can reduce the workload of checking the dynamic balance and reduce the manufacturing cost. In summary, the method for manufacturing the planetary gear seat of the automatic transmission and the products thereof according to the present invention can indeed achieve the effects of cost reduction, structural safety improvement, and dynamic balancing performance optimization, etc., so it can indeed achieve the purpose of the invention. However, the above are only the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited in this way, that is, the simple equivalent changes and modifications made in accordance with the scope of the patent application and the content of the creative specification of the present invention, All should still fall within the scope of the invention patent.

Page 121222501 Brief description of the diagram The first picture shows the shape of the conventional star planetary gear seat washer placement area as shown in the second picture is the figure of the conventional star planetary gear seat washer placement area as the third picture shows The shape of the washer placement area of the known planetary star gear seat is shown in the fourth figure, which is the manufacturing process of the known planet shaped alien washer. The fifth figure shows a conventionally different figure; each of the bracket and the disk seat is illustrated. The sixth figure shows the self-flow of the present invention. The seventh figure shows the present invention. The eighth figure shows the present invention. [Element number comparison] 5 Planetary gear seat 5 1 0 Through hole 5 1 2 Bracket tooth shape // 520 Shaped washer placement area 522 watts Division placement plane 523 Escape angle area 52 5 Disk seat tooth profile 62 Tooth profile machining steps 6 4 Top view of the disk seat of the planet gear shaft hole machining gear seat; the description is circular. Top view of the disk seat of the gear seat; Top view of the disk seat of the gear seat; The schematic diagram of the manufacturing process of the gear seat; A perspective view of a preferred embodiment of a method for manufacturing a planetary gear block of a moving transmission. Top view of the disk seat of the preferred embodiment. 51 Bracket 5 11 Pillar 52 Disk holder 5 2 1 Shaft hole 5 11 1, 5 2 2 1 Gear shaft hole 524 Weight reduction groove 61 Casting step 63 Washer placement plane processing step

Page 13 1222501 Simple illustration 7 Washer Page 14

Claims (1)

1222501 VI. Scope of patent application vy 1 · A method for manufacturing planetary sprocket wheel seat of automatic transmission, including: Casting step, the bracket and the disc seat are integrally formed and manufactured, and a two-shaped washer is formed at the position where the bracket and the disc seat correspond. Placement plane; Tooth profile processing steps, processing bracket and disc seat profile; Wasser placement plane processing step, processing profiled washer placement plane; and Planetary gear shaft hole processing steps, machining gear shaft holes for planets Gear placement. 2 · An automatic transmission planetary gear seat product, including: a bracket, a through hole is opened in the center of the bracket, and a plurality of pillars protruding downward are radiated on the bottom surface of the bracket & The cross section is an approximate T shape; and a disk seat, which is connected by the pillars of the bracket, is integrally cast with the bracket into a single body, and the disk seat is separated from the two pillars corresponding to the bracket. A shaped washer area is defined, and a shaft hole coaxial with the through hole of the bracket is provided in the center of the tray seat, and the tray seat and the bracket have a convex protrusion in each of the shaped washer placement area. Washer placement plane on the surface of the disk seat. The center of the Washer placement plane has a gear shaft hole. At the same time, an escape angle zone is defined between the washer placement plane and the two pillars. The design of the escape angle zone The flat surface processing of the Elivas placement plane. 3 · According to the method for manufacturing an automatic transmission planetary gear seat according to item 1 of the scope of the patent application, the casting materials of the bracket and the disc seat are all grades of nodular cast iron and all grades of Voss tempered nodular cast iron. Page 15 1222501 VI. Scope of patent application 4 · According to the products of the automatic gearbox planetary gear carrier described in item 2 of the scope of patent application, the brackets of the bracket can be even. 5 · According to the product of the automatic transmission planetary gear carrier described in item 2 of the scope of patent application, the brackets of the bracket may be singular. Page 16