CN213764923U

CN213764923U - Production tool for cutting gear key grooves in batches

Info

Publication number: CN213764923U
Application number: CN202021558962.6U
Authority: CN
Inventors: 张师源; 马明睿; 王梓鑫; 舒康; 马建华
Original assignee: Shaanxi Changkong Gear Co ltd
Current assignee: Shaanxi Changkong Gear Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-07-23
Anticipated expiration: 2030-07-31

Abstract

A production tool for cutting gear key grooves in batches comprises a base and a cover plate which are fixedly connected; the base is a cuboid and is provided with a plurality of through and parallel mounting holes, and gears to be processed can be overlapped and placed in the mounting holes; a bottom ring is pressed at the bottom of the mounting hole, and the radius of a central hole of the bottom ring is greater than the distance from the top of the semicircular key groove of the gear to be processed to the axis of the shaft hole; the cover plate is a rectangular plate, the width of the cover plate is consistent with that of the base, and the cover plate is provided with a plurality of screw holes corresponding to the mounting holes; an inner hexagonal fastening screw is screwed in the screw hole, a hexagonal through hole is formed in the axis position of the inner hexagonal fastening screw, and the distance from the hexagonal through hole to the axis of the inner hexagonal fastening screw is greater than the distance from the top of the semi-circular key groove of the gear to be processed to the axis of the shaft hole. The utility model discloses can place the overlapping of waiting to process the gear with the same specification in the mounting hole, the clamping only needs alignment at every turn, can be to its processing of unifying in batches. Not only guaranteed the machining precision of semicircle keyway, very big improvement machining efficiency moreover.

Description

Production tool for cutting gear key grooves in batches

Technical Field

The utility model belongs to the technical field of gear production frock, a production frock for cutting gear keyway in batches is related to.

Background

As shown in fig. 1, in a gear having a semicircular key groove, the machining accuracy of the key groove is required to be high, but it is difficult to ensure the dimensional machining requirement in general key groove milling. If the size is out of tolerance, the stability of gear transmission can be greatly influenced, and the performance of a product is further influenced. If the size is seriously out of tolerance, the parts can not be even assembled.

In order to solve the problem of low milling precision, the method adopted at present is to process a semicircular key groove by utilizing linear cutting. The specific operation is that the gear is arranged on a machine tool, and the wire cutting of the semicircular key groove is completed through a copper wire penetrating out of the shaft hole. The machining mode can effectively improve the size precision of the key groove. However, due to the fact that no proper tool is provided, the semicircular key groove machined by wire cutting can only be machined for a single gear at a time, and machining efficiency is very low. Particularly, in the preparation stage, the parts need to be mounted and dismounted every time of processing, and the parts need to be aligned again, so that the time and labor are wasted, the cost is greatly increased, and the method is not suitable for batch production of products.

Disclosure of Invention

In view of this, the utility model provides a production frock for cutting gear keyway in batches can carry out batch processing to the gear that has the semicircle keyway, has not only guaranteed the machining precision of semicircle keyway, very big improvement machining efficiency moreover.

The utility model adopts the technical proposal that: the utility model provides a production frock for cutting gear keyway in batches which characterized in that: comprises a base and a cover plate which are fixedly connected through a connecting piece; the base is a cuboid, a plurality of through mounting holes are formed in the base, the axes of the mounting holes are parallel to each other, and the aperture of each mounting hole is matched with the top circle of a gear to be machined; a bottom ring is pressed at the bottom of the mounting hole, and the radius of a central hole of the bottom ring is greater than the distance from the top of the semicircular key groove of the gear to be processed to the axis of the shaft hole; the cover plate is a rectangular plate, the width of the cover plate is consistent with that of the base, a plurality of screw holes are formed in the cover plate, the positions of the screw holes correspond to those of the mounting holes in the base, and the aperture of each screw hole is larger than that of each mounting hole; an inner hexagonal fastening screw is screwed in the screw hole, a hexagonal through hole is formed in the axis position of the inner hexagonal fastening screw, and the distance from the hexagonal through hole to the axis of the inner hexagonal fastening screw is larger than the distance from the top of the semi-circular key groove of the gear to be processed to the axis of the shaft hole.

Further, the outer edge of the pressing end of the bottom ring is provided with a pressing guide angle theta which is 20 degrees +/-2 degrees.

Further, the mounting holes of the base are arranged in a matrix form.

Furthermore, the side of the base is provided with a weight reduction groove.

The utility model has the advantages that: the utility model discloses a production frock can place the overlapping of the gear of treating of the same specification in the mounting hole, and the clamping only needs alignment at every turn, can be to its processing of unifying in batches. Not only guaranteed the machining precision of semicircle keyway, very big improvement machining efficiency moreover.

Drawings

FIG. 1 is a schematic view of a gear having a semi-circular keyway.

Fig. 2 is a schematic view of the combination of the present invention.

Fig. 3 is a longitudinal partial sectional view of fig. 2.

FIG. 4 is a schematic view of the mounting hole with the gear to be machined therein.

Fig. 5 is a schematic structural view of the base.

Fig. 6 is a schematic structural view of the cover plate.

Fig. 7 is a structural schematic diagram of a hexagonal internal set screw.

Fig. 8 is a schematic structural view of the under-ring.

In the figure: 1. the gear to be processed comprises a gear 2, a base 3, a bottom ring 4, a mounting hole 5, a cover plate 6, a screw hole 7, an inner hexagonal fastening screw 8, a hexagonal through hole 9, a cylindrical pin 10, a screw 11, a positioning pin hole 12, a screw hole 13, a weight reduction groove 14, a copper wire 15 and a positioning hole, wherein theta is a pressing guide angle.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2, a production tool for batch cutting of gear keyways comprises a base 2, a cover plate 5 and a connecting piece.

As shown in fig. 3, 4 and 5, the base 2 is a rectangular parallelepiped, a plurality of through mounting holes 4 are provided on the base 2, the axes of the mounting holes 4 are parallel to each other, and the aperture of the mounting hole 4 is adapted to the addendum circle of the gear 1 to be processed. The bottom of each mounting hole 4 is pressed with a bottom ring 3, and the radius of the central hole of the bottom ring 3 is larger than the distance from the top of the semicircular key groove of the gear 1 to be processed to the axis of the shaft hole. The side surface of the bottom ring 3 does not exceed the end surface of the bottom of the base 2. Under the supporting and blocking effects of the bottom ring 3, a plurality of gears 1 to be machined with the same specification can be overlapped and placed in the mounting holes 4. As shown in fig. 8, in order to facilitate the pressing of the foundation ring 3 in the mounting hole 4, a pressing guide angle θ is provided at the outer edge of the pressing end of the foundation ring 3, and the pressing guide angle θ is 20 ° ± 2 °.

As shown in fig. 5, the mounting holes 4 of the chassis 2 are arranged in a matrix form. The length of the mounting hole 4 is determined by the thickness of the base 2, and the size of the base 2 can be adjusted according to the specification of the gear 1 to be processed.

Because base 2 needs the location to install on the processing platform, so base 2 still is equipped with locating hole 15, and the processing platform passes through the connecting piece to be connected with locating hole 15.

The side of the base 2 is provided with a lightening groove 13 which is used for lightening the weight of the parts on one hand and can be used as a handle to facilitate the taking of the parts on the other hand.

As shown in fig. 6, the cover plate 5 is a rectangular plate, the width of the rectangular plate is consistent with that of the base 2, the cover plate 5 is provided with a plurality of screw holes 6, and the positions of the screw holes 6 correspond to the positions of the mounting holes 4 on the base 2 one by one. The aperture of the screw hole 6 is larger than that of the mounting hole 4.

As shown in fig. 3, the connection between the cover plate 5 and the base plate 2 comprises a cylindrical pin 9, a screw 10 and an internal hexagonal set screw 7. The cylindrical pin 9 is used for positioning the cover plate 5 and the base 2, so that the screw hole 6 coincides with the axis of the mounting hole 4. Corresponding positioning pin holes 11 are provided in both the cover plate 5 and the base 2. Screws 10 are used to fix the cover plate 5 to the base plate 2. Corresponding screw holes 12 are provided in both the cover plate 5 and the base 2. As shown in fig. 5 and 6, the positioning pin hole 11 and the screw hole 12 are located at positions that are not required to be provided with the mounting hole 4 and the screw hole. The structure of the hexagonal internal set screw 7 is specifically described. As shown in fig. 7, the hexagonal internal set screw 7 is a cylindrical body whose set end is a flat end. The external thread of the internal hexagonal fastening screw 7 is matched with the screw hole 6, and a hexagonal through hole 8 is arranged at the axial center position of the internal hexagonal fastening screw 7. As shown in fig. 4, the internal hexagonal set screw 7 is screwed into the screw hole 6 of the cover plate 5 to abut against the side surface of the gear 1 to be processed in the mounting hole 4. The distance from the hexagonal through hole 8 to the axis of the screw 10 is larger than the distance from the top of the semicircular key groove of the gear 1 to be processed to the axis of the shaft hole.

As shown in fig. 4, during machining, the gear 1 to be machined is placed in the mounting hole 4 of the base 2 in an overlapping manner, the cover plate 5 is fixed on the base 2, and the side face of the gear 1 to be machined in the mounting hole 4 is pressed by the hexagonal internal fastening screw 7. The base 2 is provided with a bottom ring 3 positioned in the mounting hole 4, a gear 1 to be processed, and the cover plate 5 is provided with an internal hexagonal set screw 7 for compression, so that a channel capable of penetrating through a copper wire 14 is formed. The copper wire 14 is a wire cutting component. The base 2 is positioned on the mount table. The copper wire 14 passes through the same way and then batch wire cutting of the semicircular key groove is carried out on the gear 1 to be processed. Through the structure, the utility model discloses the clamping only needs alignment once at every turn, can carry out the processing unified in batches to the semicircle keyway of a plurality of gears. Not only guaranteed the machining precision of semicircle keyway, very big improvement machining efficiency moreover.

Claims

1. The utility model provides a production frock for cutting gear keyway in batches which characterized in that: comprises a base and a cover plate which are fixedly connected through a connecting piece; the base is a cuboid, a plurality of through mounting holes are formed in the base, the axes of the mounting holes are parallel to each other, and the aperture of each mounting hole is matched with the top circle of a gear to be machined; a bottom ring is pressed at the bottom of the mounting hole, and the radius of a central hole of the bottom ring is greater than the distance from the top of the semicircular key groove of the gear to be processed to the axis of the shaft hole; the cover plate is a rectangular plate, the width of the cover plate is consistent with that of the base, a plurality of screw holes are formed in the cover plate, the positions of the screw holes correspond to those of the mounting holes in the base, and the aperture of each screw hole is larger than that of each mounting hole; an inner hexagonal fastening screw is screwed in the screw hole, a hexagonal through hole is formed in the axis position of the inner hexagonal fastening screw, and the distance from the hexagonal through hole to the axis of the inner hexagonal fastening screw is larger than the distance from the top of the semi-circular key groove of the gear to be processed to the axis of the shaft hole.

2. The production tooling for batch cutting of gear keyways of claim 1, wherein: the outer edge of the pressing end of the bottom ring is provided with a pressing guide angle theta which is 20 degrees +/-2 degrees.

3. The production tooling for batch cutting of gear keyways of claim 1, wherein: the mounting holes of the base are arranged in a matrix form.

4. The production tooling for batch cutting of gear keyways of claim 1, wherein: and a weight reduction groove is formed in the side surface of the base.