CN211101962U

CN211101962U - Arc tooth bevel gear milling cutter

Info

Publication number: CN211101962U
Application number: CN201922020478.1U
Authority: CN
Inventors: 王林
Original assignee: Hubei Hengying Gear Co ltd
Current assignee: Hubei Hengying Gear Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-07-28
Anticipated expiration: 2029-11-21

Abstract

The utility model provides an arc tooth bevel gear milling cutter, it includes the cutter head body, and the outer peripheral side of cutter head body is equipped with the cutter head groove that a plurality of intervals are the same, is provided with the tool bit in the cutter head groove, and the tool bit includes handle of a knife and sword tooth, be provided with first profile of tooth face and second profile of tooth relatively on the sword tooth, first profile of tooth face is towards cutter head body center, and first profile of tooth is personally submitted the arc concave surface, and second profile of tooth is towards the outer periphery of cutter head, and the second profile of tooth is the arc convex surface. The utility model discloses arc tooth bevel gear milling cutter, be the first profile of arc indent and the second profile of arc evagination through setting up relatively on the sword tooth, can be when rough milling or finish milling processing arc tooth and conical tooth, two flank of tooth that obtain arc tooth and conical tooth are protruding type cambered surface and concave type cambered surface respectively, from this when arc tooth and toper mesh each other, its mating surface is the mutual parcel form, be located complete surface contact, therefore can avoid the meshing district deviation too big, thereby improve the transmission precision of hyperboloid gear pair.

Description

Arc tooth bevel gear milling cutter

Technical Field

The utility model relates to a machine tooling cutter field especially relates to an arc tooth bevel gear milling cutter.

Background

The arc-shaped tooth bevel gear milling cutter is an important tool for machining arc-shaped tooth bevel gears, and is widely applied to the machining industries of automobiles, tractors, machine tool gears and the like. In particular, in an aviation transmission system, an arc-shaped bevel gear is a key part of a helicopter main reducer. However, the geometrical topological structure of the arc-shaped bevel gear is complex, and many complex actual production conditions such as high speed, heavy load and the like exist in the using process, so that the safety problems such as transmission performance, reliability and the like of the arc-shaped bevel gear are difficult to thoroughly solve.

The measurement of the meshing performance of a pair of gear pairs mainly refers to a transmission error and a meshing area, the transmission error is a main source of gear vibration and is proved by a large number of previous research results, and the quality of the meshing area directly influences the performance of gear transmission and the noise in the transmission process. At present, the central section of the tooth surface of an arc-shaped tooth bevel gear milling cutter on the market is a straight line, the normal section of an involute gear of a milled arc-shaped tooth is a plane, although the helical angle of the conical tooth is changed by changing the cutter position (or the eccentric angle) during the processing of the conical tooth, so that the conical tooth forms an arc surface, in the meshing process of the conical tooth and the arc-shaped tooth, the meshing of the arc surface of the conical tooth and the plane of the arc-shaped tooth is in line contact, so that the deviation of a meshing area is easy to be overlarge, and the transmission precision of the gear is seriously influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an arc-tooth bevel gear milling cutter to solve the above problems.

The technical scheme of the utility model is realized like this: the utility model provides an arc tooth bevel gear milling cutter, it includes the cutter head body, and the outer peripheral side of cutter head body is equipped with the cutter head groove that a plurality of intervals are the same, is provided with the tool bit in the cutter head groove, and the tool bit includes handle of a knife and sword tooth, be provided with first profile of tooth face and second profile of tooth relatively on the sword tooth, first profile of tooth face is towards cutter head body center, and first profile of tooth is personally submitted the arc concave surface, and second profile of tooth is towards the outer periphery of cutter head, and the second profile of tooth is the arc convex surface.

On the basis of the above technical scheme, preferably, the cutter tooth includes a top tooth surface, the first tooth surface and the second tooth surface are arranged opposite to the top tooth surface, and the distance between the first tooth surface and the second tooth surface is gradually reduced in the direction close to the top tooth surface.

On the basis of the technical scheme, preferably, the top tooth surface and the horizontal plane form an inclination angle of 3-8 degrees.

On the basis of the technical scheme, preferably, the cutter handle is inserted into the cutter head groove, the cutter teeth extend out of the cutter head groove, the root parts of the two sides of the cutter teeth extend outwards to form convex lugs, and the bottom surfaces of the convex lugs are abutted to the upper surface of the cutter head body.

On the basis of the technical scheme, the tool rest further comprises an inclined gasket which is inserted into the cutter head groove, one surface of the inclined gasket abuts against the tool handle, and the other surface of the inclined gasket abuts against the groove bottom of the cutter head groove.

On the basis of the technical scheme, preferably, the groove bottom of the cutter head groove is an inclined surface, and the inclination of the inclined surface is the same as that of the inclined gasket.

On the basis of the technical scheme, the tool changer is preferred to further comprise a tool tightening bolt, and the tool tightening bolt penetrates through the tool holder and the inclined gasket and is in threaded connection with the tool holder body.

On the basis of the technical scheme, preferably, the tool shank, the inclined gasket and the tool body are all provided with threaded holes which incline upwards, and the threaded holes are coaxial with each other.

The utility model discloses following beneficial effect has for prior art:

(1) the utility model discloses an arc tooth bevel gear milling cutter, the second profile surface that is the first profile surface of arc indent and arc evagination through setting up relatively on the sword tooth, can be when rough milling or finish milling processing arc tooth and conical tooth, two flank surfaces that obtain arc tooth and conical tooth are protruding type cambered surface and concave type cambered surface respectively, from this arc tooth and toper when intermeshing, its mating surface is the mutual parcel form, be located complete face contact, therefore can avoid the mating area deviation too big, thereby improve the transmission precision of hyperboloid gear pair.

(2) By adding the inclined gasket and the cutter tightening bolt, the position of the cutter head on the cutter head body in the radius direction can be adjusted, and accurate adjustment can be achieved. Simultaneously, the tool shank, the inclined gasket and the cutter head body are respectively provided with an inclined threaded hole, so that the tool bit and the cutter head body are fixed through the inclined threaded hole by the tool tightening bolt, and the tool bit is provided with a lug, so that the radial runout deviation of the cutter teeth of the whole rough-cutting milling cutter is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of the arc-tooth bevel gear milling cutter of the present invention;

fig. 2 is a top view of the arc-shaped bevel gear milling cutter of the present invention;

fig. 3 is a cross-sectional view of the arc-tooth bevel gear milling cutter of the present invention;

fig. 4 is a schematic structural view of the cutter head disclosed by the present invention;

fig. 5 is a schematic plan view of the cutter head disclosed in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

As shown in fig. 1, combine fig. 2 and 3, the embodiment of the utility model discloses an arc tooth bevel gear milling cutter, including the cutter head body 1 that is circular setting, the outer peripheral side of cutter head body 1 is equipped with the same blade disc groove 2 of a plurality of intervals, be provided with tool bit 3 among the blade disc groove 2, tool bit 3 includes handle of a knife 31 and sword tooth 32, be provided with first tooth face 321 and second tooth face 322 on the sword tooth 32 relatively, first tooth face 321 is towards cutter head body 1 center, and first tooth face 321 is the arc concave surface, second tooth face 322 is towards cutter head body 1 periphery circle, and second tooth face 322 is the arc convex surface.

Referring to fig. 3 and 4, in particular, the cutter tooth 32 includes a top tooth surface 323, the first tooth surface 321 and the second tooth surface 322 are disposed opposite to the top tooth surface 323, and the distance between the first tooth surface 321 and the second tooth surface 322 is gradually reduced in a direction approaching the top tooth surface 323. Therefore, two tooth-shaped surfaces of the cutter tooth 32 are matched with the tooth surfaces of the arc-shaped tooth or the conical tooth to be processed, and the two tooth surfaces of the arc-shaped tooth and the conical tooth are respectively a convex arc surface and a concave arc surface when the arc-shaped tooth and the conical tooth are processed by rough milling or finish milling. Therefore, when the arc-shaped teeth and the cone are meshed with each other, the meshing surfaces of the arc-shaped teeth and the cone are mutually wrapped and are in complete surface contact, so that overlarge deviation of a meshing area can be avoided, and the transmission precision of the hyperboloid gear pair is improved.

In this embodiment, the top tooth surface 323 forms an angle a with the horizontal plane, where the angle a is 3 ° to 8 °. By adopting the structure, when the gear groove is roughly machined, the inclined top tooth surface 323 can cut into a blank piece, so that rough milling is facilitated.

In the present embodiment, the tool shank 31 is inserted into the tool pan groove 2, the cutter tooth 32 extends out of the tool pan groove 2, the root portions of both sides of the cutter tooth 32 extend outward to form a lug 324, and the bottom surface of the lug 324 abuts against the upper surface of the tool pan body 1. The cutter head 3 can cross over the cutter head groove 2 to the cutter body through the lug 324 at the root of the cutter tooth 32, and the clamping and fixing are convenient.

Specifically, an inclined gasket 4 is further inserted into the cutter head groove 2, one surface of the inclined gasket 4 abuts against the cutter handle 31, and the other surface of the inclined gasket 4 abuts against the groove bottom of the cutter head groove 2. Through setting up the inclined shim 4, can adjust the position of tool bit 3 on the cutter head body 1 in the radius direction, be convenient for realize rough milling and finish milling. When the arc gear is roughly machined, the tool bit 3 is enabled to form two concentric circle revolving bodies by adjusting the tool bit 3 to different radius positions on the cutter head body 1, and rough milling and grooving are conveniently carried out. When the arc gear is finely machined, all the cutter heads 3 are adjusted to be consistent with the center of the cutter head body 1, and gear grooves are conveniently finely milled. The position of the tool bit 3 to the center of the cutter head body 1 can be adjusted by replacing the inclined gaskets 4 with different thicknesses.

In this embodiment, the tool holder 31, the inclined washer 4, and the cutter head 1 are provided with threaded holes inclined upward, and the threaded holes are coaxial with each other. Through setting up tight sword bolt 5, can pass the screw hole on handle of a knife 31, the gasket 4 to carry out threaded connection with the screw hole on the cutter head body 1, thereby realize fixing tool bit 3 in blade disc groove 2 through tight sword bolt 5.

In the embodiment, the groove bottom of the cutter head groove 2 is an inclined surface, and the inclination of the inclined surface is the same as that of the inclined gasket 4. By adopting the structure, the cutter head 3 is subjected to the action of radial force of the cutter teeth 32 in the milling process, and the cutter teeth 32 are matched with the cutter head groove 2 with the inclined surface cutter handle 31 and the inclined surface through the inclined gasket 4, so that the cutter teeth 32 are more stable in the milling process, and the cutter head 3 is matched with the cutter head body 1 to prevent radial run-out deviation. Meanwhile, the inclined fastening bolt is adopted, so that the cutter head 3 is pressed downwards in the milling process of the cutter teeth 32 and is limited by the supporting force of the fastening bolt, and the cutter head 3 is more stably matched with the cutter head body 1.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an arc tooth bevel gear milling cutter, its includes cutter head body (1), and the outer peripheral side of cutter head body (1) is equipped with a plurality of interval the same cutter head groove (2), is provided with tool bit (3) in cutter head groove (2), and tool bit (3) are including handle of a knife (31) and sword tooth (32), its characterized in that: the cutter tooth (32) is relatively provided with a first toothed surface (321) and a second toothed surface (322), the first toothed surface (321) faces the center of the cutter head body (1), the first toothed surface (321) is an arc-shaped concave surface, the second toothed surface (322) faces the outer peripheral ring of the cutter head body (1), and the second toothed surface (322) is an arc-shaped convex surface.

2. An arc tooth bevel gear milling cutter according to claim 1 wherein: the cutter tooth (32) comprises a top tooth surface (323), the first tooth surface (321) and the second tooth surface (322) are arranged opposite to the top tooth surface (323), and the distance between the first tooth surface (321) and the second tooth surface (322) is gradually reduced in the direction close to the top tooth surface (323).

3. An arc tooth bevel gear milling cutter according to claim 2 wherein: the top tooth surface (323) and the horizontal plane form an inclination angle of 3-8 degrees.

4. An arc tooth bevel gear milling cutter according to claim 1 wherein: the knife handle (31) is inserted into the knife disc groove (2), the knife teeth (32) extend out of the knife disc groove (2), the roots on two sides of the knife teeth (32) extend outwards to form lugs (324), and the bottom surfaces of the lugs (324) are abutted to the upper surface of the knife disc body (1).

5. An arc tooth bevel gear milling cutter according to claim 4 wherein: the cutter handle is characterized by further comprising an inclined gasket (4), the inclined gasket (4) is inserted into the cutter handle groove, one surface of the inclined gasket (4) is abutted against the cutter handle (31), and the other surface of the inclined gasket (4) is abutted against the groove bottom of the cutter handle groove (2).

6. An arc tooth bevel gear milling cutter according to claim 5 wherein: the bottom of the cutter head groove (2) is an inclined surface, and the inclination of the inclined surface is the same as that of the inclined gasket (4).

7. An arc tooth bevel gear milling cutter according to claim 6 wherein: the cutter tightening bolt is characterized by further comprising a cutter tightening bolt (5), wherein the cutter tightening bolt (5) penetrates through the cutter handle (31) and the inclined gasket (4) and is in threaded connection with the cutter head body (1).

8. An arc tooth bevel gear milling cutter according to claim 7 wherein: all be provided with the screw hole of ascending slope on handle of a knife (31), gasket (4) and the cutter head body (1), and each screw hole is coaxial each other.