Spiral gear key groove machining and positioning device

Abstract

The utility model relates to a spiral gear key groove machining and positioning device which comprises a bottom plate, a supporting and positioning table installed on the bottom plate and used for containing a spiral gear and a positioning mechanism located on the outer side of the supporting and positioning table. The supporting and positioning table comprises a supporting table and a positioning boss installed on the top of the supporting table. The spiral gear is placed on the supporting table, and the positioning boss is embedded into a center hole of the spiral gear. The positioning mechanism comprises two first positioning assemblies and a second positioning assembly. The first positioning assembly comprises a first insertion rod used for being inserted into a spiral gear tooth groove and an installation base used for installing the first insertion rod. The second positioning assembly comprises a second inserting rod used for being inserted into a spiral gear tooth groove and a driving air cylinder driving the second inserting rod to be close to or away from the supporting positioning table. The key groove machining precision is improved, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of helical gear manufacturing technology, and in particular to a positioning device for machining keyways of helical gears. Background Technology

[0002] During the production and processing of helical gears, a keyway needs to be machined on the inner wall of its central hole. The positional accuracy of the keyway machining is high, and it needs to be aligned with one of the teeth of the helical gear. Therefore, the helical gear blank needs to be positioned during machining.

[0003] Currently, there is no dedicated positioning fixture for machining keyways of helical gears. During machining, workers need to place the helical gear on the workbench and judge the keyway slotting position based on experience. The keyway is then slotted by a keyway machine, resulting in low slotting accuracy and affecting product quality.

[0004] Based on the above problems, the inventors designed a positioning device for keyway machining of helical gears. After the helical gear is positioned by this device, the keyway opened by the keyway machine blade after it moves down is aligned with one of the teeth of the helical gear, which improves the accuracy of keyway machining and meets the work requirements. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a positioning device for machining keyways in helical gears.

[0006] This utility model is achieved through the following technical solution: a positioning device for machining keyways of a helical gear is provided, including a base plate, a support positioning platform mounted on the base plate for placing the helical gear, and a positioning mechanism located outside the support positioning platform; the support positioning platform includes a support base and a positioning boss mounted on the top of the support base, the helical gear is placed on the support base and the positioning boss is embedded in the central hole of the helical gear; the positioning mechanism includes two sets of first positioning components and one set of second positioning components; the first positioning components include a first insert rod for inserting into the helical gear tooth groove and a mounting seat for mounting the first insert rod; the second positioning components include a second insert rod for inserting into the helical gear tooth groove and a drive cylinder for driving the second insert rod closer to or away from the support positioning platform.

[0007] Preferably, a collection groove is provided in the middle of the support platform, and a through hole is provided in the middle of the positioning boss. The through hole communicates with the collection groove through an opening at the top of the collection groove. A chip removal hole is provided on the side wall of the support platform, which communicates with the collection groove and is used for chip removal. During keyway machining, after the keyway machine blade moves down, it opens the keyway for the helical gear. Waste chips fall into the collection groove and are discharged through the chip removal hole.

[0008] Preferably, a clearance notch is provided on the positioning boss. The clearance notch facilitates the avoidance of the downward-moving keyway machine blade, and also facilitates the placement and removal of the helical gear.

[0009] Preferably, the two sets of first positioning components and the one set of second positioning components are circumferentially distributed along the outer side of the support positioning platform.

[0010] Preferably, the mounting base includes a rotating block and a connecting block fixed on the rotating block, and the first insertion rod is mounted on the connecting block.

[0011] Preferably, an arc-shaped through hole is provided on the rotating block, and a locking screw for passing through the arc-shaped through hole is fixed on the base plate. A locking nut is connected to the locking screw above the rotating block. The rotating block is fixed by the cooperation of the locking screw and the locking nut. The position and orientation of the first insertion rod can be easily adjusted by adjusting the rotating block. The position and orientation of the first insertion rod can be easily adjusted according to different models of helical gears, so that the first insertion rod is inserted into the tooth groove of the helical gear to meet the working requirements.

[0012] Preferably, a horizontal mounting hole is provided on the connecting block for the first insert rod to pass through. After the first insert rod is inserted into the mounting hole, it is tightened and fixed by a vertically set tightening bolt. When it is necessary to adjust the first insert rod to move closer to or further away from the support positioning platform, loosen the tightening bolt and adjust the first insert rod. After adjustment, tighten the tightening bolt to fix the first insert rod.

[0013] Preferably, the second insert rod is connected to the piston rod of the drive cylinder, and the outer cylinder of the drive cylinder is mounted on the base plate. The extension or retraction of the piston rod of the drive cylinder controls the insertion or removal of the second insert rod into the helical gear tooth groove.

[0014] Preferably, to ensure the stability of the helical gear positioning, a clamping mechanism for clamping the helical gear is also installed on the base plate outside the support positioning platform.

[0015] Preferably, the clamping mechanism includes a pressure plate for clamping the helical gear and a rotary cylinder for driving the pressure plate to move. The pressure plate moves up and down while rotating 90° around the rotary cylinder. The outer cylinder of the rotary cylinder is mounted on a base plate, and the piston rod of the rotary cylinder is connected to the pressure plate by bolts. When clamping the helical gear, the piston rod of the rotary cylinder moves down and rotates 90°, causing the pressure plate to move down from one side of the helical gear to clamp it. When releasing the clamping, the piston rod of the rotary cylinder moves up and rotates 90°, causing the pressure plate to move to the side of the helical gear.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. This utility model has a simple structure and a good positioning effect on the helical gear. After positioning the helical gear, the keyway opened by the keyway cutting machine blade is aligned with one of the teeth of the helical gear, which improves the precision of keyway processing, improves product quality, and meets the work requirements.

[0018] 2. This utility model can adjust the position and orientation of the two first insert rods according to different models of helical gears, and can be applied to the keyway processing of different models of helical gears, with a wide range of applications. Attached Figure Description

[0019] Figure 1 This is a top view of the structure of this utility model;

[0020] Figure 2 This is a top view of the structure of the present invention when positioning the gear;

[0021] Figure 3 This is a schematic diagram of the structure of the mounting base of this utility model;

[0022] Figure 4 This is a top view of the positioning boss of this utility model.

[0023] As shown in the figure:

[0024] 1. Base plate, 2. Helical gear, 3. Support platform, 4. Positioning boss, 5. Collection groove, 6. Clearance notch, 7. First insert rod, 8. Rotating block, 9. Connecting block, 10. Arc-shaped through hole, 11. Locking screw, 12. Locking nut, 13. Tightening bolt, 14. Second insert rod, 15. Drive cylinder, 16. Pressure plate, 17. Rotary cylinder. Detailed Implementation

[0025] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0026] like Figure 1-4 As shown, this utility model includes a base plate 1, a support and positioning platform mounted on the base plate 1 for placing the helical gear 2, and a positioning mechanism located outside the support and positioning platform.

[0027] The support positioning platform includes a support platform 3 and a positioning boss 4 installed on the top of the support platform 3. The helical gear 2 is placed on the support platform 3, and the positioning boss 4 is embedded in the central hole of the helical gear 2. A collection groove 5 is provided in the middle of the support platform 3, and a through hole is provided in the middle of the positioning boss 4. The through hole communicates with the collection groove 5 through an opening at the top of the collection groove 5. A chip removal hole is provided on the side wall of the support platform 3, communicating with the collection groove 5 and used for chip removal. An avoidance notch 6 is provided on the positioning boss 4, which facilitates the avoidance of the downward-moving keyway cutting tool and facilitates the placement and removal of the helical gear 2. During keyway machining, after the keyway cutting tool moves down, it cuts the keyway in the helical gear 2, and the waste chips fall into the collection groove 5 and are discharged through the chip removal hole.

[0028] The positioning mechanism includes two sets of first positioning components and one set of second positioning components, which are circumferentially distributed along the outer side of the supporting positioning platform.

[0029] The first positioning assembly includes a first insert rod 7 for insertion into the tooth groove of a helical gear and a mounting base for mounting the first insert rod 7. The mounting base includes a rotating block 8 and a connecting block 9 fixed on the rotating block 8. The first insert rod 7 is mounted on the connecting block 9. An arc-shaped through hole 10 is provided on the rotating block 8. A locking screw 11 for passing through the arc-shaped through hole 10 is fixed on the base plate 1. A locking nut 12 is connected to the locking screw 11 above the rotating block 8. The rotating block 8 is fixed by the cooperation of the locking screw 11 and the locking nut 12. The position and orientation of the first insert rod 7 can be easily adjusted by adjusting the rotating block 8. The position and orientation of the first insert rod 7 can be easily adjusted according to different models of helical gears 2 so that the first insert rod 7 can be inserted into the tooth groove of the helical gear 2 to meet the working requirements.

[0030] A horizontal mounting hole is provided on the connecting block 9 for the first insertion rod 7 to pass through. After the first insertion rod 7 is inserted into the mounting hole, it is tightened and fixed by the vertically set top bolt 13. When it is necessary to adjust the first insertion rod 7 to be closer to or further away from the support positioning platform, loosen the top bolt 13 and adjust the first insertion rod 7. After the adjustment is completed, tighten the top bolt 13 to fix the first insertion rod 7.

[0031] The second positioning assembly includes a second insert rod 14 for inserting into the tooth groove of the helical gear and a drive cylinder 15 for driving the second insert rod 14 closer to or away from the support positioning platform. The second insert rod 14 is connected to the piston rod of the drive cylinder 15. The outer cylinder of the drive cylinder 15 is mounted on the base plate 1. The extension or retraction of the piston rod of the drive cylinder 15 controls the insertion of the second insert rod 14 into or out of the tooth groove of the helical gear 2.

[0032] To ensure the stability of the positioning of the helical gear 2, a clamping mechanism for pressing the helical gear 2 is also installed on the base plate 1 outside the support positioning platform. The clamping mechanism includes a pressure plate 16 for pressing the helical gear 2 and a rotary cylinder 17 for driving the pressure plate 16 to move. While the pressure plate 16 moves up and down, it rotates 90° around the rotary cylinder 17. The outer cylinder of the rotary cylinder 17 is installed on the base plate 1, and the piston rod of the rotary cylinder 17 is connected to the pressure plate 16 by bolts.

[0033] When it is necessary to press the helical gear 2, the piston rod of the rotary cylinder 17 moves down and rotates 90°, causing the pressure plate 16 to move down from one side of the helical gear 2 to press the helical gear 2. When it is necessary to release the pressure, the piston rod of the rotary cylinder 17 moves up and rotates 90°, causing the pressure plate 16 to move to one side of the helical gear 2. In this embodiment, the pressing mechanism consists of two symmetrically arranged sets.

[0034] In practical use, the spiral gear 2 model to be processed needs to be debugged in advance. The rotating blocks 8 of the two first positioning components are adjusted to ensure that the positions and orientations of the two first insert rods 7 are correct, so that the ends of the two first insert rods 7 and the second insert rod 14 can be accurately inserted into the tooth grooves of the spiral gear 2. At this time, the keyway machine blade moves down and processes the keyway, which is aligned with one of the teeth of the spiral gear 2. In subsequent processing, the spiral gear 2 to be processed with the keyway is placed on the support positioning table, so that the ends of the two first insert rods 7 are respectively inserted into one tooth groove of the spiral gear 2. Then, the piston rod of the drive cylinder 15 is controlled to extend so that the end of the second insert rod 14 is also inserted into one tooth groove of the spiral gear 2. Then, the piston rod of the rotary cylinder 17 is controlled to move down and rotate 90° so that the pressure plate 16 presses the spiral gear 2. Finally, the keyway machine blade is controlled to move down and process the keyway.

[0035] This utility model has a simple structure and a good positioning effect on the helical gear 2. After positioning the helical gear 2, the keyway opened by the keyway cutting machine blade is aligned with one of the teeth of the helical gear 2, which improves the precision of keyway processing and meets the working requirements. The position and orientation of the two first insert rods 7 can be adjusted according to different models of helical gear 2, making it applicable to keyway processing of different models of helical gear 2, with a wide range of applications.

[0036] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A helical gear keyway machining positioning device, characterized by: The device comprises a base plate, a supporting positioning table for placing a helical gear mounted on the base plate, and a positioning mechanism located outside the supporting positioning table; the supporting positioning table comprises a supporting table and a positioning boss mounted on the top of the supporting table, the helical gear is placed on the supporting table and the positioning boss is embedded in the central hole of the helical gear; the positioning mechanism comprises two groups of first positioning components and one group of second positioning components; the first positioning component comprises a first inserting rod for inserting into the tooth slot of the helical gear and a mounting seat for mounting the first inserting rod; the second positioning component comprises a second inserting rod for inserting into the tooth slot of the helical gear and a driving cylinder for driving the second inserting rod to approach or move away from the supporting positioning table.

2. A helical gear keyway machining positioning device according to claim 1, characterized in that: A collecting groove is arranged in the middle of the supporting table, a through hole is arranged in the middle of the positioning boss, the through hole is communicated with the collecting groove through an opening in the top of the collecting groove, and a chip removal hole for removing chips is arranged in the side wall of the supporting table and communicated with the collecting groove.

3. A helical gear keyway machining positioning device according to claim 1, characterized in that: An avoiding gap is arranged on the positioning boss.

4. A helical gear keyway machining positioning device according to claim 1, characterized in that: The two groups of first positioning components and the group of second positioning components are distributed in a circumferential direction outside the supporting positioning table.

5. A helical gear keyway machining positioning device according to claim 1, characterized in that: The mounting seat comprises a rotating block and a connecting block fixed on the rotating block, and the first inserting rod is mounted on the connecting block.

6. A helical gear keyway machining positioning device according to claim 5, characterized in that: An arc-shaped through hole is arranged on the rotating block, a locking screw for penetrating through the arc-shaped through hole is fixed on the base plate, and a locking nut is connected on the locking screw above the rotating block.

7. A helical gear keyway machining positioning device according to claim 6, characterized in that: A mounting hole for the first inserting rod to penetrate through is horizontally arranged on the connecting block, and the first inserting rod is fixed by being inserted into the mounting hole and then being tightly fixed by a vertically arranged jacking bolt.

8. A helical gear keyway machining positioning device according to claim 1, characterized in that: The second inserting rod is connected with the piston rod of the driving cylinder, and the outer cylinder of the driving cylinder is mounted on the base plate.

9. A helical gear keyway machining positioning device according to claim 1, characterized in that: A pressing mechanism for pressing the helical gear is also mounted on the base plate outside the supporting positioning table.

10. A helical gear keyway machining positioning device according to claim 1, characterized in that: The pressing mechanism comprises a pressing plate for pressing the helical gear and a rotating cylinder for driving the pressing plate to move, the pressing plate rotates by 90° around the rotating cylinder while moving up and down, the outer cylinder of the rotating cylinder is mounted on the base plate, and the piston rod of the rotating cylinder is connected with the pressing plate through a bolt.

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