TW536596B - Method for manufacturing differential device - Google Patents

Abstract

The present invention provides a method for manufacturing differential device. The method comprises forming external teeth on a thick steel tube by milling, fixing the thick steel tube that has the external teeth formed by milling, an aluminum casting portion and two differential bevel gear shafts together by aluminum casting to form a blank for a drive gear, mounting and positioning a first pair of bevel gears on the differential bevel gear shafts, and fitting flanges of left and right bevel gear covers that support a second pair of bevel gear shafts in shallow circular recesses formed on opposite sides of the drive gear whereby the drive gear, the two pair of differential bevel gear, left and right bevel gear covers and left and right wheel axles can be mounted to a central axis precisely and readily while the two axles that are securely assembled together generate no noise due to vibration. The quality for manufacturing differential device can thus be significantly enhanced. It is indeed a breakthrough in the technology of differential device.

Description

536596

The invention relates to a method for manufacturing a differential. Check the known case of the differential, there are new patent application number 8 9 2 0 3 0 2 7 and patent publication number 4 2 9 〇 丨 "structure improvement of electric speeder" (refer to No. 1 Figures, that is, "Y, ·" and 8 9 2 〇 3 7 3 6 in the case, "4, 3, 1 3" and "good structure" of patent publication No. 4 3 3 1 9 3 (refer to Figure 2) (That is, figure 5 of the case plan). As for the driving wheel (丨) in the previous case, the driving wheel train was formed by pressing and forming into a hollow square groove (la), and a locking hole (1 f) (1 g) was provided on each of the left and right sides. ) Grooves (丨 b) (丨 c) (丨 d) (丨 e), followed by 2 insert two umbrella-shaped differential wheels (5) (6) into the left too of the positioning shaft (7) + / ~ After the two sides of the stone are put into the recessed grooves on the left and right sides of the driving wheel (1), the positioning pieces (/ .ν ό) and the screws (2) are fixed in the locking circular holes for fixing. As far as the above-mentioned active wheel is concerned, it includes a joint receiving jewel 6 1 and a ring gear 6 2 fixed to the outer peripheral edge of the joint receiving body 6 1, and? β 彳 a, 叩 置 定 置 体 b 1 has a central hole 613 and a wheel groove 614 and 614 on each side. The differential bevel gears 7 and 7 shaft holes are sleeved with bearings 7 2 of wear-resistant material. After being inserted into the wheel grooves 6 1 4 and 6 1 4 ′ of the bearing body, a pin 6 61 is inserted into the pin hole 61 5 from the outer periphery of the bearing body 6 1 to the center to pass through the bearing hole 721 of the bearing 72. It can be known from the driving wheel structure of the conventional differential that the previous case requires that the driving wheel (丨) be made by powder forming punching, and an umbrella-shaped differential wheel (f6 / after the positioning shaft (7) on both sides, Then, the positioning piece (3) is locked into the driving wheel (1) with screws (2) and fixed in the recessed structure of the driving wheel (1). The number of parts is large, and the centering is not easy; in the latter case, it needs to be combined with the bearing. The body 6 1 has a center hole garment 6 1 3 and two wheel grooves 6 丨 4, 6 丨 4 on both sides, and pin holes 6 丨 5, which are symmetrically arranged.

536596 V. Description of the invention (2) " ~ 5 "The outer ring gear 6 2 and the flange 6 2 1 with a roughly square hole on one side in the axial direction need to strictly control the processing quality and careful assembly of each part, In order to achieve the desired speed, the manufacturing cost is high. Therefore, the number of parts required in the two previous cases is large, the processing and assembly is complicated, the manufacturing cost is high, and the correct determination of each component is difficult. It is easy to shift and shake large% sounds when the differential is running. ::, The main purpose of the present invention is to break through the traditional differential manufacturing method for a new differential, which can ensure that the differential drives the centerline of the return shaft. Those who are accurate and reliable in operation ^ < The quality of the manufacturing process. "Another objective of the present invention is to provide a" number of structural parts "to reduce the manufacturing cost and the ease of installation of the differential manufacturing component. In order to achieve the above-mentioned objects and effects, the present invention includes: (a) taking a thick steel pipe with a certain width to first teeth on its outer circumferential surface to form an initial embryo of a driving gear; and (b) driving a large gear The two sides of the initial embryo of the gear are divided into two sections: Intermediate wall; ⑺turned 'to form a figure (C) Perforate a number of holes in the intermediate wall. (D) Place the wheel shaft with the C-shaped retaining ring groove in the drive wall, and use the fixture cover. The fixed differential small helical gear is finely positioned from the original embryo of the caster wheel, and then the aluminum shaft is cast into the body of the driving ring gear by the cast aluminum method; ^ (E) in the driving ring gear. _ J early cut a concave surface on each side of the embryo;

6052-7A.ptd Page 5 536596 V. Description of the invention (3) (F) Insert the holes of the plurality of fixing screws on the concave surface of the driving embryo's initial embryo; (G) Install the first pair of differential small helical gears After entering the above-mentioned axle and inserting the C-shaped retaining ring, the second pair of left and right differential small helical gears are respectively engaged with the second pair of left and right differential small helical gears to the first pair of differential small helical gear covers. The helical gear and the helical gear cover are fixed on the concave surfaces on both sides of the driving gear. The above and other objects, effects, and features of the present invention will be made clear by the description of the specific embodiments shown in the following drawings. The figure numbers are explained as follows: 1 1 丨 Zone moving large gear 11 1 1 1 External teeth 112 113 Intermediate wall 114 115 、 11 5 'Concave surface 116 12 Differential small helical gear shaft 121 13 Cast aluminum section 131 2, 3 Differential small bevel Gear 21 thick steel pipe, 1 1 2 'recessed holes on both sides, 116' C-shaped ring groove fixing screw hole at right angle to the concave surface] type ring 31 left axle 31 'right axle 4 oblique #wheel cover 41 bearing 4 2 Flange 4 3 Fixing screw 41 1 Flange outer circle 4 1 2 Flange side 4 1 3 Wheel cover fixing screw through hole For manufacturing method of the differential according to the present invention, please refer to FIGS. 3 to 9 for differential speed The manufacturing process of the drive big gear (1) of the device is described as follows: The manufacturing process includes:

6052-7A.ptd Page 6 536596 V. Description of the invention (4) (A) Take a thick steel pipe (1 1) with a suitable width dimension w and a thickness T of 12 ~ 15 mm, and mill an external tooth on its outer circumference. (1 1 1) to form an initial embryo of a driving large gear (1), as shown in FIG. 3; (B) turning the first and second round concaves on the two sides of the original embryo of the driving large gear (1), respectively The groove (1 1 2, 11 2,), as shown in FIG. 4, has a depth less than 1/2 of the width W, and thus forms an intermediate wall (丨 丨 3) between the two circular grooves; (C) in the middle A plurality of holes (1 1 4) are drilled at regular intervals on the wall (丨 丨 3) as shown in Figure 5; (D) will have the difference between the C-shaped ring grooves (1 2 1, 1 2 1) Move the small helical gear shaft (12, i2) 'By using a jig (not shown), it is placed in the inner peripheral space of the intermediate wall (Π 3) inside the primary embryo of the driving large gear (1) and uses the differential small helical gear After the C-shaped retaining ring grooves (丨 2 丨, 1 2 丨) of the shaft (1 2, 1 2) also serve as positioning grooves, each of the two parts (1 3) 'is made using the cast ginger method to make the two differentials slightly inclined. The gear shaft (1 2, 1 2) is reliably centered in the casting mold to drive the large gear (丨The initial embryo, the cast aluminum part (13) and the differential small helical gear shaft (12, 12) are fixed into one. During the casting process, the intermediate wall (丨 丨 3) of the primary embryo of the large gear (1) is driven. The majority of holes (11 4) formed at equal intervals are used in the casting process to inject cast aluminum into these holes (1 1 4) so as to surely drive the cast aluminum portion (1 3) with the drive. The primary embryos of the large gear (1) are integrated into one body, as shown in Figure 6; (E) The CNC then uses a CNC lathe to make shallow circular concave surfaces on both sides of the primary embryo of the driving large gear (1) (11 5, 1 1 5,), as shown in Figure 7; (F) On the shallow round concave surface (lb, 115,) of the primary embryo of the driving gear (1), a plurality of holes (丨3 1), 俾 is convenient for fixing the bevel wheel cover (4) on it, as shown in Figure 8, and the drive large gear (!) System is completed.

6〇52-7A.ptd Page 7 536596 Jade and invention description (5) Manufacturing process; and (G) In order to make the two sides of the rotating gear of the differential (1) set diagonally on both sides, then drive the big wheel The cover (4) has a convex of the correct size: 2), as shown in FIG. 9, the L of the round concave surface (115, 115,), and the flange (42) is provided with a flange (42) The outer periphery (43) is a through hole (44) corresponding to 1 ^ 31, and the shallow circular concave surface (115, 115, 112, k) of the wheel (1) is tightly fitted to a plurality of fixing screw holes for driving the large tooth Hole (131) 'Yes. The driving large gear S = The wheel cover ⑷ has support and differential small helical gears (3'3) as the left and right wheel shafts (31, 31,) shown in Figure 9. J Yoshimoto lx > The driving large gear (1) in the monthly differential mode is made into a semi-product as shown in Figure 10A according to the above process, and the differential small helical gears (2, 2) are respectively installed in the differential small helical gears. After the shafts (12, 12), insert the C-shaped retaining ring (21) into the C-shaped retaining ring groove (121) to complete the assembly of the two differential small helical gears (2, 2), as shown in Figure ι〇Β. The 'shown' will then be combined with the differential pinion gears (3, 3) respectively The left and right wheel axles (3 1, 3 1 ') of the body are supported by bearings (4 1) of the helical gear cover (4), respectively.' The flange (4 3) of the wheel cover (4) is externally connected to the drive shaft. Inside the shallow circular concave surface (11 5, 11 5,) of the gear (1), at this time, the two differential small helical gears (3, 3) are sprayed on the two differential small helical gears (2, 2), respectively, and finally Use the through hole (44) of the wheel cover (4) to insert the screw bolt into the screw hole (丨 31) of the driving gear (丨) to fix the differential small helical gear (3, 3) to the driving gear (1) Within this, the assembly of the differential is completed as shown in Fig. IOC. After the assembly of the differential is completed by the present invention, the assembly is shown in Fig. 11

6052-7A.ptd Page 8 536596 V. Explanation of the invention (6) The body decomposition diagram shows that the differential of the present invention has been simplified into a large gear (1) and a second pair of differential small helical gear shafts and a second pair The left and right helical gear covers (4, 4) of the differential pinion gear. Therefore, the invention has the characteristics of simplified structure, reduced manufacturing cost and easy installation. From the above, it can be seen that the manufacturing method of the differential according to the present invention is to reduce the number of parts and reduce the cost. The thick steel pipe is used to mill the external teeth and the fixture is used to fix the differential small helical gear shaft as the positioning groove. The C-shaped buckle groove is used for positioning, and the thick steel pipe with milled external teeth, the casted part and the two differential small helical gear shafts are fixed by the cast inscription to form the driving large gear (1), and then the first pair of differentials The moving small helical gear is inserted into the differential small helical gear shaft by positioning the C-shaped retaining ring into its C-shaped retaining ring groove. Then, the flanges of the left and right helical gear covers supporting the second pair of differential small helical gear shafts are positioned outside. The edge fits tightly into the shallow circular concave surface of the rain side of the driving gear, so that the driving gear primary embryo, two pairs of differential small helical gears, left and right helical gear covers, and left and right wheel axles are easily assembled in a very accurate center Online and make it firmly assembled without any shaking or noise between the two shafts, which greatly improves the quality of manufacturing differentials. This section is actually a major breakthrough in the differential technology of the present invention. Meet the requirements for applying for an invention patent.

6052-7A.ptd Page 9 536596 Brief description of the drawing Figure 1 is a front perspective view of the combined structure of "Structure improvement of the differential of an electric scooter". Fig. 2 is a sectional view of a structural combination of a conventional "differential structure improvement". FIG. 3 is a schematic diagram of the first process of the “method for manufacturing a differential” according to the present invention. FIG. 4 is a schematic diagram of the second manufacturing process of the “method for manufacturing a differential” according to the present invention. FIG. 5 is a schematic diagram of the third process of the “method of manufacturing a differential” according to the present invention. FIG. 6 is a schematic diagram of the fourth process of the “method for manufacturing a differential” according to the present invention. FIG. 7 is a schematic diagram of the fifth process of the “method for manufacturing a differential” according to the present invention. FIG. 8 is a schematic diagram of a sixth process of the “method for manufacturing a differential” according to the present invention. FIG. 9 is a schematic diagram of a wheel cover of the present invention. Figures 10A-10C are assembly schematic diagrams of the differential of the present invention. FIG. 11 is a three-dimensional exploded view of the differential of the present invention after assembly.

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Claims (1)

536596 VI. Application for Patent Scope 1 · A manufacturing method for differential speed 'characterized by' The method includes: (A) taking a thick steel pipe of a certain width (11) milling an external tooth (1 1) on its outer circumferential surface 1) to form a primary embryo of the driving large gear (1); (B) turning on both sides of the primary embryo of the driving large gear (1) to form an intermediate wall (1 1 3) of a T-shaped section; C) a plurality of holes (1 1 4) are formed in the intermediate wall (1 1 3); (D) a differential small helical gear shaft (1 2) having a C-shaped ring groove is placed on the driving gear (1) In the middle wall of the primary embryo (1 1 3), the primary embryo of the driving large gear and the differential small helical gear shaft are accurately cast into one body by casting aluminum; (E) In the driving large gear (1) A concave surface (151, 151,) is turned on each side of the initial embryo; (F) a plurality of holes (1 3 1) for fixing screws are drilled on the concave surface of the driving large gear (1); (G) After the first pair of differential small helical gears (2-2 ') are installed in the axles (12, 12') and embedded in the C-shaped retaining ring, the left and right helical gear covers ( 4) respectively Left and right second differential bevel pinion engaged with the helical gear and the two are fixed to the cover on both sides of the concave surface of the large gear driven by the first pair of differential bevel pinion. 2. The manufacturing method of the differential according to item 1 of the scope of patent application, wherein the plurality of holes provided in the middle wall of the driving embryo's primary embryo are injection materials for the aluminum casting part used for aluminum casting. Within the plurality of holes, the cast aluminum portion and the two differential small helical gear shafts and the driving large gear primary embryo are consolidated into one body. 6052-7A.ptd Page 11 536596 6052-7A.ptd Page 12