Auxiliary clamp for milling oil groove in gear

Abstract

The utility model discloses an auxiliary fixture for milling an oil groove in a gear, which comprises a base, and an elastic mandrel and a positioning component are mounted on the base; the elastic core shaft comprises a core shaft part, a limiting disc and an elastic expansion sleeve which are coaxially arranged, the core shaft part and the limiting disc are provided with communicated threaded through holes in the axial direction, a pressing assembly is installed in the elastic core shaft, the core shaft part is inserted into an installation through hole formed in the base, and the positioning assembly comprises a supporting seat installed on the upper surface of the base; a positioning pin base is installed at the top of the supporting seat, a turning plate parallel to the base is installed on the positioning pin base, a positioning pin is movably installed on the turning plate, the pressing assembly presses the elastic expansion sleeve to enable the elastic expansion sleeve to expand a shaft hole of the gearbox gear, and the outer circle of the bottom of the positioning pin is in tangent clamping connection with an inner spline tooth groove of the gearbox gear. The auxiliary clamp provides symmetric reference points for milling oil grooves, can quickly and accurately machine symmetric oil grooves on the end face of a gearbox gear, and is quick in machining, good in quality consistency, high in rate of finished products and suitable for batch production and machining.

Description

Technical Field

[0001] This utility model belongs to the field of gear processing technology, and relates to an auxiliary fixture, specifically an auxiliary fixture for milling oil grooves in gears. Background Technology

[0002] To ensure the normal operation and extend the service life of automotive transmissions, symmetrical oil grooves, based on the internal spline grooves, need to be machined on the end faces of the transmission gears during the transmission gear manufacturing process. In existing processes, the transmission gears are typically clamped in a fixture, and then the corresponding positions of the symmetrical oil grooves are manually aligned above the internal spline grooves before milling. During this process, the manual clamping of the transmission gears lacks a reference point, leading to inconsistent clamping and easy misalignment of the transmission gear end faces with the horizontal direction. Manually aligning the oil grooves not only results in poor consistency in the machining quality but is also time-consuming, labor-intensive, and inefficient. Furthermore, misalignment can damage the tooth thickness of the internal spline grooves during machining, resulting in a high defect rate. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an auxiliary fixture for milling oil grooves in gears, which can solve the technical problems of poor processing quality consistency, high defect rate, and time and labor cost in the existing oil groove milling process.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An auxiliary fixture for milling oil grooves in gears includes a base on which a longitudinally arranged elastic mandrel and a positioning assembly are mounted.

[0006] The elastic mandrel includes a mandrel part, a limiting plate, and an elastic expansion sleeve arranged coaxially. The top of the mandrel part is fixedly connected to the limiting plate, and the elastic expansion sleeve is fixedly installed on the top of the limiting plate. The mandrel part and the limiting plate are provided with a connected threaded through hole along the axial direction. A clamping component is installed in the threaded through hole. The top of the clamping component is in contact with the elastic expansion sleeve, and the bottom of the clamping component is set in the base. The elastic expansion sleeve is used to clamp the shaft hole of the gearbox gear.

[0007] The base has a stepped mounting through hole in the middle, the spindle is inserted into the mounting through hole, the limiting plate covers the top of the mounting through hole, the edge of the limiting plate has a limiting slot in the radial direction, the upper surface of the base has a limiting groove at the position corresponding to the limiting slot, an anti-rotation flat key is installed in the limiting groove, and one end of the anti-rotation flat key is inserted into the limiting slot.

[0008] The positioning component includes a support base, a positioning pin base, a flap, and a positioning pin. The bottom of the support base is mounted on the upper surface of the base, the positioning pin base is mounted on the top of the support base, the flap is parallel to the upper surface of the base, one end of the flap is rotatably mounted on the positioning pin base, the other end of the flap is located above the elastic spindle, the top of the positioning pin is movably mounted on the flap, and the bottom outer circle of the positioning pin engages with the internal spline groove of the gearbox gear.

[0009] This utility model also includes the following technical features:

[0010] The clamping assembly includes a pressure plate and a washer coaxially arranged with the elastic mandrel. The pressure plate is disposed inside the elastic expansion sleeve, and the washer is disposed inside the mounting through hole. Both the pressure plate and the washer are provided with clamping through holes coaxially arranged with the threaded through hole. A stud screw is disposed in the clamping through hole, and the end of the stud screw passes through the clamping through hole and is threadedly connected to the threaded through hole.

[0011] The pressure plate is in the shape of an inverted frustum cone, and the elastic expansion sleeve is cylindrical. The inner surface of the elastic expansion sleeve is machined with a conical surface that matches the outer surface of the pressure plate. An annular groove is formed at the bottom of the conical surface along the circumference. Multiple opening slots are formed at equal intervals along the radial direction on the side wall of the elastic expansion sleeve. The top of the opening slot penetrates the top of the elastic expansion sleeve. A circular through hole is integrally connected to the bottom of the opening slot. The circular through hole is located at the junction of the conical surface and the annular groove.

[0012] The flap is vertically provided with a strip groove that passes through the other end of the flap. The positioning pin includes a long screw and a positioning rod arranged coaxially. The top end of the long screw passes through the strip groove, and the bottom end of the long screw is fixedly connected to the top end of the positioning rod. The bottom end of the positioning rod is chamfered.

[0013] A pair of nuts are installed on the long screw, and the pair of nuts are respectively set at the vertical ends of the strip groove to install the positioning pin on the flip plate.

[0014] The positioning pin base includes a pair of vertically arranged mounting plates. The longitudinal rear ends of the pair of mounting plates are fixedly connected to a fixing block connected to the support base. A limiting plate is connected between the longitudinal front ends of the pair of mounting plates. One end of the flip plate is rotatably installed between the pair of mounting plates, and the lower surface of the flip plate is in contact with the upper surface of the limiting plate.

[0015] The base has an inverted T-shaped structure. The elastic spindle and positioning assembly are installed on the top of the base. U-shaped grooves are provided at both ends of the base. Fixing bolts are installed in the U-shaped grooves. Multiple cylindrical positioning blocks are installed at the bottom of the base.

[0016] The taper of the cone surface is 1:3.

[0017] The width of the anti-rotation key matches the width of the limiting slot.

[0018] The diameter of the positioning rod is 6-10 mm.

[0019] Compared with the prior art, this utility model has the following technical effects:

[0020] The auxiliary clamp in this invention, through the cooperation of anti-rotation flat key and limiting buckle, prevents the elastic mandrel from rotating relative to the base on its axis. The clamping component fixes the elastic mandrel on the base from both vertical ends, preventing the elastic mandrel from moving vertically relative to the base and keeping the elastic mandrel stable during use. The pressure plate deforms and tightens the elastic expansion sleeve to the shaft hole of the gearbox gear, so that the gearbox gear is horizontally and stably installed on the elastic mandrel. The positioning pin in the positioning component is engaged with the tooth root of the internal spline groove of the gearbox gear, providing a symmetrical reference point for milling the oil groove. It can quickly and accurately process symmetrical oil grooves with the tooth groove as the reference on the end face of the gearbox gear without damaging the tooth thickness of the internal spline groove. The processing is fast and the quality is consistent, with a high yield, making it suitable for mass production. Attached Figure Description

[0021] Figure 1 This is a top view of the overall structure of this utility model.

[0022] Figure 2 yes Figure 1 AA sectional view.

[0023] Figure 3 yes Figure 2 A three-dimensional image.

[0024] Figure 4 This is a schematic diagram of the structure of the elastic mandrel of this utility model.

[0025] Figure 5 This is a structural schematic diagram of the positioning pin base of this utility model.

[0026] Figure 6 This is a schematic diagram of the positioning pin of this utility model.

[0027] Figure 7 This is a schematic diagram of the structure of the flip plate of this utility model.

[0028] Figure 8 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Base; 2. Flexible spindle; 3. Positioning assembly; 4. Clamping assembly; 5. Gearbox gear.

[0031] 11. Mounting through hole; 12. Limiting groove; 13. Anti-rotation flat key; 14. U-shaped groove; 15. Fixing bolt; 16. Positioning block;

[0032] 21. Mandrel section; 22. Limiting plate; 23. Elastic expansion sleeve; 24. Threaded through hole; 25. Limiting bayonet.

[0033] 31. Support base; 32. Locating pin base; 33. Flip plate; 34. Locating pin;

[0034] 41. Pressure plate; 42. Washer; 43. Clamping through hole; 44. Head screw;

[0035] 51. Shaft hole; 52. Internal spline groove;

[0036] 231. Conical surface; 232. Annular groove; 233. Opening groove; 234. Circular through hole;

[0037] 321. Mounting plate; 322. Fixing block; 323. Limiting plate

[0038] 331. Slotted groove;

[0039] 341. Long screw, 342. Positioning rod, 343. Nut.

[0040] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0041] Following the above technical solution, the following are specific embodiments of this utility model. It should be noted that this utility model is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solution of this application fall within the protection scope of this utility model.

[0042] In this utility model, unless otherwise stated, directional terms such as "upper", "lower", "left", and "right" are generally defined based on the drawing in the corresponding figure; "inner" and "outer" refer to the inner and outer contours of the corresponding components; and "longitudinal", "transverse", and "vertical" refer to the directions marked in the figure.

[0043] Example:

[0044] This embodiment provides an auxiliary fixture for milling oil grooves in gears, such as... Figures 1 to 8 As shown, it includes a base 1, on which a flexible spindle 2 and a positioning assembly 3 are mounted along the longitudinal direction;

[0045] The elastic mandrel 2 includes a mandrel part 21, a limiting plate 22 and an elastic expansion sleeve 23 arranged coaxially. The top of the mandrel part 21 is fixedly connected to the limiting plate 22, and the elastic expansion sleeve 23 is fixedly installed on the top of the limiting plate 22. The mandrel part 21 and the limiting plate 22 are provided with a threaded through hole 24 connected along the axial direction. A clamping component 4 is installed in the threaded through hole 24. The top of the clamping component 4 is in contact with the elastic expansion sleeve 23, and the bottom of the clamping component 4 is set in the base 1. The elastic expansion sleeve 23 is used to clamp the shaft hole 51 of the gearbox gear 5.

[0046] The base 1 has a stepped mounting through hole 11 in the middle of the vertical direction. The spindle part 21 is inserted into the mounting through hole 11. The limiting plate 22 covers the top of the mounting through hole 11. The edge of the limiting plate 22 has a limiting slot 25 in the radial direction. The upper surface of the base 1 has a limiting groove 12 at the position corresponding to the limiting slot 25. An anti-rotation flat key 13 is installed in the limiting groove 12. One end of the anti-rotation flat key 13 is inserted into the limiting slot 25.

[0047] The positioning component 3 includes a support base 31, a positioning pin base 32, a flap 33, and a positioning pin 34. The bottom of the support base 31 is mounted on the upper surface of the base 1, the positioning pin base 32 is mounted on the top of the support base 31, the flap 33 is parallel to the upper surface of the base 1, one end of the flap 33 is rotatably mounted on the positioning pin base 32, and the other end of the flap 33 is located above the elastic spindle 2. The top of the positioning pin 34 is movably mounted on the flap 33, and the bottom outer circle of the positioning pin 34 engages with the inner spline groove 52 of the gearbox gear 5.

[0048] In this embodiment, the auxiliary clamp is suitable for gearbox gears 5 with an even number of internal spline grooves 52. The shaft hole 51 of the gearbox gear 5 is fitted onto the elastic expansion sleeve 23. The top of the clamping assembly 4 causes the elastic expansion sleeve 23 to deform outward, tightening the shaft hole 51 of the gearbox gear 5 and fixing the gearbox gear 5 onto the elastic mandrel 2. The diameter of the mandrel part 21 matches the diameter of the mounting through hole 11, and the mandrel part 21 is stably inserted into the mounting through hole 11. The anti-rotation flat key 13 and the limiting bayonet 25 cooperate to prevent the elastic mandrel 2 from rotating relative to the base 1 on its axis. The clamping assembly 4 fixes the elastic mandrel 2 onto the base 1 from both vertical ends, preventing the elastic mandrel 2 from rotating relative to the base 1. The base 1 moves vertically, securing the gearbox gear 5 to the elastic spindle 2. The flip plate 33 is flipped so that it is parallel to the upper surface of the base 1. The positioning pin 34 is moved to correspond with the root of the internal spline groove 52 of the gearbox gear 5, so that the bottom of the positioning pin 34 is engaged with the root of the internal spline groove 52 of the gearbox gear 5. Using the positioning pin 34 as a reference point, turning 90° left or right is the operation point for processing the oil groove. Thus, the operator can quickly process symmetrical oil grooves based on the tooth groove on the end face of the gearbox gear 5 without damaging the tooth thickness of the internal spline groove. The processing is fast and the quality is consistent, with a high yield, making it suitable for mass production.

[0049] As a preferred embodiment, the clamping assembly 4 includes a pressure plate 41 and a washer 42 coaxially arranged with the elastic mandrel 2. The pressure plate 41 is disposed inside the elastic expansion sleeve 23, and the washer 42 is disposed inside the mounting through hole 11. The mounting through hole 11 is stepped, with a smaller top and a larger bottom. The washer 42 is engaged with the step. Both the pressure plate 41 and the washer 42 are provided with clamping through holes 43 coaxially arranged with the threaded through hole 24. A stud screw 44 is disposed in the clamping through hole 43. The end of the stud screw 44 on the pressure plate 41 passes through its clamping through hole 43 and is threaded to the top of the threaded through hole 24. The end of the stud screw 44 on the washer 42 passes through its clamping through hole 43 and is threaded to the bottom of the threaded through hole 24. The elastic mandrel 2 is fixed from both vertical ends, so that the elastic mandrel 2 remains fixed in the vertical position relative to the base 1.

[0050] As a preferred embodiment, the pressure plate 41 is in the shape of an inverted frustum cone, and the elastic expansion sleeve 23 is cylindrical. The inner surface of the elastic expansion sleeve 23 is machined with a conical surface 231 that matches the outer surface of the pressure plate 41. The bottom of the conical surface 231 is provided with an annular groove 232 along the circumferential direction. The sidewall of the elastic expansion sleeve 23 is provided with multiple opening slots 233 at equal intervals along the radial direction. The top of the opening slot 233 penetrates the top of the elastic expansion sleeve 23. The bottom of the opening slot 233 is integrally connected with a circular through hole 234. The circular through hole 234 is located at the junction of the conical surface 231 and the annular groove 232. The above structure enables the elastic expansion sleeve 23 to uniformly tighten the shaft hole 51 of the gearbox gear 5 under the force of the pressure plate 41. The gearbox gear 5 will not shift in the horizontal direction due to uneven force. The upper and lower end faces of the gearbox gear 5 are always parallel to the upper surface of the base 1 and the flip plate 33.

[0051] As a preferred embodiment, the flap 33 is provided with a vertically extending slot 331 that passes through the other end of the flap. The positioning pin 34 can move along the length of the slot 331. The positioning pin 34 includes a long screw 341 and a positioning rod 342 arranged coaxially. The top end of the long screw 341 passes through the slot 331, and the bottom end of the long screw 341 is fixedly connected to the top end of the positioning rod 342. The bottom end of the positioning rod 342 is chamfered to prevent the positioning rod 342 from contacting the inner spline groove 52 of the gearbox gear 5 and damaging the inner spline groove due to impact.

[0052] A pair of nuts 343 are installed on the long screw 341. The pair of nuts 343 are respectively set at the vertical ends of the strip groove 331. The positioning pin 34 is installed on the flap 33. When the pair of nuts 343 are loosened, the long screw 341 can move along the strip groove 331. After moving to the target position, the nuts 343 are tightened from the upper and lower ends, and the position of the positioning pin 34 is fixed.

[0053] As a preferred embodiment, the positioning pin base 32 includes a pair of vertically arranged mounting plates 321. The longitudinal rear ends of the pair of mounting plates 321 are fixedly connected to a fixing block 322 connected to the support base 31. A limiting plate 323 is connected between the longitudinal front ends of the pair of mounting plates 321. One end of the flip plate 33 is rotatably installed between the pair of mounting plates 321. The lower surface of the flip plate 33 is in contact with the upper surface of the limiting plate 323, which can ensure that the flip plate 33 is placed horizontally, so that the flip plate 33 and the end face of the gearbox gear 5 remain horizontal, thereby ensuring that the positioning pin 34 is always perpendicular to the end face of the gearbox gear 5, and avoiding collision with the gearbox gear 5.

[0054] As a preferred embodiment, the base 1 in this embodiment has an inverted T-shaped structure. The elastic spindle 2 and the positioning component 3 are installed on the top of the base 1. U-shaped grooves 14 are provided at both ends of the base 1. Fixing bolts 15 are installed in the U-shaped grooves 14. Multiple cylindrical positioning blocks 16 are installed at the bottom of the base 1, which are in clearance fit with the T-shaped groove of the milling machine to securely install the base 1 on the milling machine.

[0055] As a preferred embodiment, the taper of the conical surface 231 of the elastic expansion sleeve 23 is 1:3, and the taper of the corresponding conical surface of the pressure plate 41 is also 1:3. In this embodiment, the surface roughness of the conical surface of the pressure plate 41 is 0.8μm. As the two conical surfaces of the elastic expansion sleeve 23 and the pressure plate 41 gradually approach each other, the included angle becomes smaller, thereby generating a larger preload and fastening force to clamp the gearbox gear 5.

[0056] As a preferred embodiment, the width of the anti-rotation flat key 13 matches the width of the limiting slot 25 to prevent the elastic spindle 2 from rotating relative to the base 1 and improve the stability of clamping.

[0057] As a preferred embodiment, the diameter of the positioning rod 342 in this embodiment is 6-10mm. The outer circle of the positioning rod 342 is tangentially engaged with the inner surface of the inner spline groove 52 of the gearbox gear 5. Positioning pins 34 of different diameters are selected according to the span of different inner splines to realize the replaceability of the positioning pins 34 and improve applicability.

[0058] In actual operation of this embodiment:

[0059] Install the positioning block 16 on the base 1 in accordance with the T-slot of the milling machine. Fix the base 1 on the milling machine with the fixing bolt 15. Install the elastic mandrel 2 and the washer 42 in the mounting through hole 11. Align the limiting groove 12 with the limiting slot 25. Insert the anti-rotation flat key 13 into the limiting slot 25 and fix it. Fix the washer 42 to the threaded through hole 24 of the elastic mandrel 2 from below with the stub screw 44. Put the gearbox gear 5 on the elastic expansion sleeve 23. Press the pressure plate 41 into the elastic expansion sleeve 23. Select a positioning pin 34 that matches the size of the gearbox gear 5. Install the positioning pin 34 on the flip plate 33. Flip the flip plate 33 so that it is aligned with the gearbox gear 5. With the end face of gearbox gear 5 parallel, adjust the position of positioning pin 34, and simultaneously rotate gearbox gear 5 to make the inner spline groove 52 and the outer circle of the end of positioning rod 342 fit together. After the position is determined, fix positioning pin 34 with a pair of nuts 343, and then tighten the spur screw 44 on pressure plate 41. While fixing elastic spindle 2, squeeze elastic expansion sleeve 23. Elastic expansion sleeve 23 deforms and tightens shaft hole 51 of gearbox gear 5, fixing gearbox gear 5 in place. Start machining symmetrical oil grooves of gearbox gear 2. After machining is completed, flip up flap 33, loosen spur screw 44 on pressure plate 41, and remove the machined gearbox gear 5.

[0060] The above operation method can complete the milling of the oil groove of a gearbox gear 5 in just 30 seconds, with good consistency in processing quality, and is suitable for mass production.

Claims

1. An auxiliary fixture for milling oil grooves in gears, comprising a base (1), characterized in that, The base (1) is equipped with a longitudinally arranged elastic spindle (2) and a positioning assembly (3); The elastic mandrel (2) includes a mandrel part (21), a limiting plate (22) and an elastic expansion sleeve (23) arranged coaxially. The top of the mandrel part (21) is fixedly connected to the limiting plate (22), and the elastic expansion sleeve (23) is fixedly installed on the top of the limiting plate (22). The mandrel part (21) and the limiting plate (22) are provided with a threaded through hole (24) along the axial direction. A clamping component (4) is installed in the threaded through hole (24). The top of the clamping component (4) is in contact with the elastic expansion sleeve (23), and the bottom of the clamping component (4) is set in the base (1). The elastic expansion sleeve (23) is used to tighten the shaft hole (51) of the gearbox gear (5). The base (1) has a stepped mounting through hole (11) in the middle of the vertical direction. The spindle part (21) is inserted into the mounting through hole (11). The limiting plate (22) covers the top of the mounting through hole (11). The edge of the limiting plate (22) is radially provided with a limiting slot (25). The upper surface of the base (1) is provided with a limiting groove (12) at the position corresponding to the limiting slot (25). An anti-rotation flat key (13) is installed in the limiting groove (12). One end of the anti-rotation flat key (13) is inserted into the limiting slot (25). The positioning component (3) includes a support base (31), a positioning pin base (32), a flap (33), and a positioning pin (34). The bottom of the support base (31) is installed on the upper surface of the base (1), the positioning pin base (32) is installed on the top of the support base (31), the flap (33) is parallel to the upper surface of the base (1), one end of the flap (33) is rotatably installed on the positioning pin base (32), the other end of the flap (33) is located above the elastic spindle (2), the top of the positioning pin (34) is movably installed on the flap (33), and the bottom outer circle of the positioning pin (34) is engaged with the inner spline groove (52) of the gearbox gear (5).

2. The auxiliary fixture for milling oil grooves in gears as described in claim 1, characterized in that, The clamping assembly (4) includes a pressure plate (41) and a washer (42) coaxially arranged with the elastic mandrel (2). The pressure plate (41) is disposed in the elastic expansion sleeve (23), and the washer (42) is disposed in the mounting through hole (11). Both the pressure plate (41) and the washer (42) are provided with clamping through holes (43) coaxially arranged with the threaded through hole (24). A stud screw (44) is disposed in the clamping through hole (43), and the end of the stud screw (44) passes through the clamping through hole (43) and is threadedly connected to the threaded through hole (24).

3. The auxiliary fixture for milling oil grooves in gears as described in claim 2, characterized in that, The pressure plate (41) is in the shape of an inverted frustum cone, and the elastic expansion sleeve (23) is cylindrical. The inner surface of the elastic expansion sleeve (23) is machined with a conical surface (231) that matches the outer surface of the pressure plate (41). The bottom of the conical surface (231) is provided with an annular groove (232) along the circumferential direction. The side wall of the elastic expansion sleeve (23) is provided with multiple opening slots (233) at equal intervals along the radial direction. The top of the opening slot (233) penetrates the top of the elastic expansion sleeve (23). The bottom of the opening slot (233) is integrally connected with a circular through hole (234). The circular through hole (234) is located at the junction of the conical surface (231) and the annular groove (232).

4. The auxiliary fixture for milling oil grooves in gears as described in claim 1, characterized in that, The flap (33) is provided with a vertically extending slot (331) that passes through the other end of the flap. The positioning pin (34) includes a long screw (341) and a positioning rod (342) arranged coaxially. The top end of the long screw (341) passes through the slot (331), and the bottom end of the long screw (341) is fixedly connected to the top end of the positioning rod (342). The bottom end of the positioning rod (342) is chamfered. A pair of nuts (343) are installed on the long screw (341). The pair of nuts (343) are respectively set at the vertical ends of the strip groove (331) to install the positioning pin (34) on the flap (33).

5. The auxiliary fixture for milling oil grooves in gears as described in claim 1, characterized in that, The positioning pin base (32) includes a pair of vertically arranged mounting plates (321). The longitudinal rear ends of the pair of mounting plates (321) are fixedly connected to a fixing block (322) connected to the support base (31). A limiting plate (323) is connected between the longitudinal front ends of the pair of mounting plates (321). One end of the flip plate (33) is rotatably installed between the pair of mounting plates (321). The lower surface of the flip plate (33) is in contact with the upper surface of the limiting plate (323).

6. The auxiliary fixture for milling oil grooves in gears as described in claim 1, characterized in that, The base (1) is an inverted T-shaped structure. The elastic spindle (2) and the positioning component (3) are installed on the top of the base (1). U-shaped grooves (14) are provided at both ends of the base (1). Fixing bolts (15) are installed in the U-shaped grooves (14). Multiple cylindrical positioning blocks (16) are installed at the bottom of the base (1).

7. The auxiliary fixture for milling oil grooves in gears as described in claim 3, characterized in that, The taper of the conical surface (231) is 1:

3.

8. The auxiliary fixture for milling oil grooves in gears as described in claim 1, characterized in that, The width of the anti-rotation key (13) matches the width of the limiting slot (25).

9. The auxiliary fixture for milling oil grooves in gears as described in claim 4, characterized in that, The diameter of the positioning rod (342) is 6~10mm.

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