CN212191584U - Tooth profile chamfering device for shaft gear - Google Patents
Tooth profile chamfering device for shaft gear Download PDFInfo
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- CN212191584U CN212191584U CN202020586468.4U CN202020586468U CN212191584U CN 212191584 U CN212191584 U CN 212191584U CN 202020586468 U CN202020586468 U CN 202020586468U CN 212191584 U CN212191584 U CN 212191584U
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- profile structure
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Abstract
The utility model discloses a tooth profile chamfering device for shaft gear, including the first lower mould that has the first upper mould of first tooth profile structure and second tooth profile structure, the first upper mould and the first lower mould of coaxial superpose, with the tooth top department fixed connection of first tooth profile structure and second tooth profile structure, first upper mould and lower mould are provided with the clearance, first upper mould and lower mould form the chamber of placing of gear; the utility model discloses a profile of tooth chamfering device will go up mould one and mould one forms a whole down, ingenious through first profile of tooth structure and second profile of tooth structure is arranged, will whole treat that processing shaft gear surrounds in the chamfering device, the teeth of a cogwheel part that will need the chamfer exposes in the device outside, implement comprehensive protection to the flank of tooth and the adjacent step of the teeth of a cogwheel, make the chamfer in-process can not harm other positions, and can accurately fall the exposed profile of a cogwheel part that needs the chamfer, the chamfer is efficient, and the chamfer uniformity is good.
Description
Technical Field
The utility model relates to a gear machining field specifically relates to a flank profile chamfering device for shaft gear.
Background
In the gear production, in the high-precision gear industry, tooth profiles at two ends of a gear tooth of a gear and a tooth edge between the tooth surface of the gear tooth and a tooth top are required to be chamfered, so that the edge stress concentration or thermal crack is avoided, the influence of scraping the tooth surface by edge meshing is avoided, particularly the influence of scraping the tooth surface by edge interference after the gear tooth is deformed under load is avoided, the gear quality can be improved, and the meshing impact is reduced; noise is reduced, and if chamfering is carried out along the end face of the gear, the generation of noise and damage to the tooth surface of the meshing, which are caused by tooth surface protrusion due to small collision damage, can be prevented; the meshing precision is improved, the meshing impact is reduced, and the vibration during meshing is reduced; and the gear stripping can be reduced, the generation of edge hot cracks and fatigue cracks is avoided, and the service life of the gear is prolonged.
The existing chamfering process method comprises the following steps: chamfering by a bench worker, chamfering by hobbing, chamfering by a special machine tool, chamfering by a robot and the like.
For chamfering of shaft gear tooth profiles for small batches or trial production of sample pieces, manual chamfering is often required because no special chamfering equipment or special equipment suitable for large-batch processing is customized. However, as the tooth profile of the shaft gear is often close to the step, the adjacent step and the tooth surface can be damaged by manual chamfering, particularly when the tooth root part with small size space is chamfered, the manual chamfering is often different in size and uneven, secondary damage to the product is caused, the consistency of the product is poor, and the quality stability of the product is influenced.
Generally, in order to solve the above problems, a tapered rotary file or a tapered grinding wheel head with a suitable size needs to be selected according to the size of the gear teeth and the chamfering. However, this solution does not completely solve the problem of damage to adjacent steps and tooth flanks during chamfering.
Therefore, it is necessary to develop a chamfering device for shaft gear tooth profile suitable for small lot or sample trial production.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome not enough and the defect mentioned in the above background art, provide a low cost, work efficiency is high, be fit for the axle gear flank profile's of small batch or sample trial-manufacturing chamfering device.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the tooth profile chamfering device for the shaft gear comprises an upper die I with a first tooth profile structure and a lower die I with a second tooth profile structure, wherein the upper die I and the lower die I are coaxially overlapped to fixedly connect the tooth tops of the first tooth profile structure and the second tooth profile structure; the upper die I and the lower die I enclose a placing cavity for forming a gear;
the first upper die is a first hollow sleeve, and the first tooth profile structure is arranged on the outer circumferential surface of one end of the first hollow sleeve; the first tooth-profile structure has a tooth-profile dimension less than the normal modulus or the end modulus of the shaft gear;
the lower die is a hollow cylindrical sleeve I, the second tooth profile structure is arranged on the inner circumferential surface of one end of the cylindrical sleeve I, and the tooth profile size of the first tooth profile structure is equal to the normal modulus or the end face modulus of the shaft gear.
The utility model discloses a tooth profile chamfering device for shaft gear will go up mould one and mould one forms a whole down, arrange through first tooth profile structure and second tooth profile structure are ingenious, will whole treat that processing shaft gear surrounds in the chamfering device, will need the shaft gear tooth part of chamfer to expose in the device outside, implement comprehensive protection to the flank of tooth of the teeth of a cogwheel and adjacent step, make the chamfer in-process can not harm other positions, and can accurately fall the exposed tooth profile part that needs the chamfer, chamfer is efficient, and the chamfer uniformity is good.
The utility model discloses a profile of tooth chamfering device for shaft gear utilizes gear profile of tooth profile profiling technique, can follow the even profile of tooth chamfer of device pouring size to can not harm adjacent step and flank of tooth, effectively improve work efficiency.
Furthermore, the gear is a shaft gear, and the hollow sleeve I of the upper die I is step-shaped and is sleeved outside the shaft part of the shaft gear.
Further, the difference that the tooth profile dimension of the first tooth profile structure is smaller than the normal modulus or the end modulus of the shaft gear is a chamfer dimension coefficient.
Further, the number of teeth of the first tooth profile structure is the same as that of the second tooth profile structure, and is equal to that of the gear to be chamfered.
The utility model discloses a tooth profile chamfering device for shaft gear is applicable to different types of gears, for example to the spur gear, the second profile of bed die one designs into the tooth's socket profile according to the normal modulus of product, and the first tooth profile structure of bed die one sets up into the tooth profile according to the modulus that reduces chamfer size coefficient than the normal modulus of product; for the bevel gear, the second profile of the first lower die is designed into a tooth space profile according to the end face modulus of the product, and the first tooth profile structure of the first upper die is designed into a tooth profile according to a modulus which is reduced by a chamfer size coefficient compared with the end face modulus of the product.
The size of the chamfering device is adjusted according to the difference of the gear product structure, the adaptability is strong, and the chamfering device is easy to popularize and use.
Further, the longitudinal length of the first lower die is smaller than the tooth width of the gear to be chamfered. The gear tooth part of the shaft gear to be machined can be exposed out of the gap between the first tooth profile structure and the second tooth profile structure, and chamfering machining operation is facilitated.
Furthermore, an edge of the lower die is provided with an installation groove embedded along the axial direction.
In order to more facilitate chamfering, the tooth profile chamfering device further comprises a pressing sleeve structure arranged at one end far away from the second tooth profile structure, the pressing sleeve structure is provided with a protruding portion, the protruding portion is matched with the mounting groove of the first lower die, and the first lower die is locked through threads.
Furthermore, the pressing sleeve structure is a step-shaped protective sleeve, and the inner wall of the protective sleeve is abutted to the outer wall of the shaft part of the shaft gear.
The pressing sleeve structure can effectively lock the upper die and the lower die, after the gear teeth at one end of the gear are subjected to edge grinding, threads of the pressing sleeve structure and the lower die are opened, the gear is placed in the tooth profile chamfering device in an inverted mode, and the gear teeth at the other end are subjected to edge grinding.
In order to make things convenient for the operation of chamfering to the gear both ends more, the utility model provides another kind of scheme, this profile chamfering device still can dismantle the bed die second that has the fourth profile structure and the last mould two of third profile structure of being connected including setting up with bed die one, bed die one and bed die two radially be face clearance fit of cylinder, bed die one passes through the bolt location with the axial of bed die two.
Further, the structure of the second upper die with the third tooth profile structure and the structure of the second lower die with the fourth tooth profile structure are respectively the same as the structure of the first upper die with the first tooth profile structure and the structure of the first lower die with the second tooth profile structure, and the structures are arranged in a central symmetry mode.
The gear tooth profiles at the two ends of the gear can be exposed outside the device through the arrangement, and the chamfering of the profiles at the two ends of the gear can be finished without multiple times of installation and disassembly.
Compared with the prior art, the utility model discloses beneficial effect as follows:
the utility model discloses a tooth profile chamfering device for shaft gear will go up mould one and lower mould one and form a whole, through the ingenious arrangement of first tooth profile structure and second tooth profile structure, will whole treat that processing shaft gear surrounds in the chamfering device, the teeth of a cogwheel part that will need the chamfer exposes in the device outside, implement comprehensive protection to the flank of tooth and the adjacent step of the teeth of a cogwheel, make the chamfer in-process can not harm other positions, and can accurately fall the exposed tooth profile part that needs the chamfer, the chamfer is efficient, and the chamfer uniformity is good.
The utility model discloses a profile of tooth chamfering device for shaft gear utilizes right gear profile of tooth profile profiling technique, can follow the even profile of tooth chamfer of device pouring size to can not damage adjacent step and flank of tooth, effectively improve work efficiency.
The utility model discloses a tooth profile chamfering device for shaft gear is applicable to the gear of different types different specifications, for example to the spur gear, the second profile of bed die one designs into the tooth's socket profile according to the normal modulus of product, and the first tooth profile structure of bed die one sets into the tooth profile according to the modulus that reduces chamfer size coefficient than the normal modulus of product; for the bevel gear, the second profile of the first lower die is designed into a tooth space profile according to the end face modulus of the product, and the first tooth profile structure of the first upper die is designed into a tooth profile according to a modulus which is reduced by a chamfer size coefficient compared with the end face modulus of the product.
In addition, in order to more conveniently chamfer the two ends of the gear, the tooth profile chamfering device for the shaft gear has the advantages that through structural design, the tooth profiles of the gear teeth at the two ends of the gear can be exposed outside the device, and the chamfering of the profiles at the two ends of the gear can be completed without multiple times of installation and disassembly.
The size of the chamfering device is adjusted according to the difference of the gear product structure, the adaptability is strong, and the chamfering device is easy to popularize and use.
Drawings
Fig. 1 is a schematic sectional structure view of a tooth profile chamfering device for a shaft gear according to embodiment 1.
Fig. 2 is a structural plan view of the tooth profile chamfering device for the shaft gear according to embodiment 1.
Fig. 3 is a schematic structural view of the tooth profile chamfering device for the shaft gear according to embodiment 2.
Fig. 4 is a schematic structural view of the second cylindrical sleeve in embodiment 2.
The structure comprises a hollow sleeve I, a first tooth profile structure, a cylindrical sleeve I; 1 ' -hollow sleeve II, 11 ' -third tooth profile structure, 2 ' -cylindrical sleeve II, 21 ' -fourth tooth profile structure, 22 ' -groove-shaped structure, 23 ' -positioning clamping groove, 24 ' -outer groove-shaped structure, 4-bolt and 5-spring.
Detailed Description
To facilitate understanding of the present invention, the present invention will be described more fully and specifically with reference to the accompanying drawings and preferred embodiments, but the scope of the present invention is not limited to the specific embodiments described below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by an existing method.
Example 1
As shown in fig. 1 and 2, the tooth profile chamfering device for a shaft gear in the present embodiment includes a first upper mold having a first tooth profile structure 11 and a first lower mold having a second tooth profile structure 21, the first upper mold and the first lower mold being coaxially stacked, the first tooth profile structure 11 and the second tooth profile structure 21 being fixedly connected at tooth tips by welding, and the first upper mold and the second lower mold being provided with a gap configured to position teeth of the shaft gear to be processed; the upper die I and the lower die I enclose a placing cavity for forming the gear.
Specifically, the first upper die is a hollow sleeve I1 with a step shape, and the first tooth profile structure 11 is arranged on the outer circumferential surface of one end of the hollow sleeve I1; the tooth profile dimension of the first tooth profile structure 11 is smaller than the normal modulus or the end modulus of the shaft gear; the lower die is a hollow cylindrical sleeve I2, the second tooth profile structure 21 is arranged on the inner circumferential surface of one end part of the cylindrical sleeve I2, and the tooth profile size of the first tooth profile structure 11 is equal to the normal modulus or the end surface modulus of the shaft gear; the first tooth profile structure 11 and the second tooth profile structure 21 have the same number of teeth, which is equal to the number of teeth of the gear to be chamfered.
The stepped hollow sleeve I1 of the upper die I is sleeved outside the shaft part of the shaft gear, and the tooth profile size of the first tooth profile structure 11 is smaller than the normal modulus or the end face modulus of the shaft gear and is a chamfering size coefficient.
In order to completely surround the shaft gear to be chamfered by the chamfering device, the longitudinal length of the first lower die is set to be smaller than the tooth width of the shaft gear to be chamfered, and the tooth profile of the gear tooth of the shaft gear to be chamfered is exposed from the gap between the first upper die and the first lower die after assembly, so that chamfering is convenient to process.
In order to facilitate chamfering, the tooth profile chamfering device further comprises a pressing sleeve structure 3 arranged at one end far away from the second tooth profile structure 21, wherein the pressing sleeve structure 3 is provided with a protruding portion 31 which is matched with the mounting groove 22 of the first lower die and locks the first lower die through threads.
Furthermore, the pressing sleeve structure 3 is a step-shaped protecting sleeve 32, and the inner wall of the protecting sleeve 32 is abutted with the outer wall of the shaft part of the shaft gear.
The pressing sleeve structure 3 can effectively lock the upper die and the lower die, after the gear teeth at one end of the gear are subjected to edge grinding, the threads of the pressing sleeve structure 3 and the lower die are opened, the gear is placed in the tooth profile chamfering device in an inverted mode, and the gear teeth at the other end are subjected to edge grinding.
The utility model discloses a tooth profile chamfering device for shaft gear is applicable to different types of gears, for example to the spur gear, the second profile of bed die one designs into the tooth's socket profile according to the normal modulus of product, and the first tooth profile structure of bed die one sets up into the tooth profile according to the modulus that reduces chamfer size coefficient than the normal modulus of product; for the bevel gear, the second profile of the first lower die is designed into a tooth space profile according to the end face modulus of the product, and the first tooth profile structure of the first upper die is designed into a tooth profile according to a modulus which is reduced by a chamfer size coefficient compared with the end face modulus of the product. The size of the chamfering device is adjusted according to the difference of the gear product structure, the adaptability is strong, and the chamfering device is easy to popularize and use.
Example 2
As shown in fig. 3 and 4, in order to more conveniently chamfer two ends of a gear, the present embodiment provides another solution, on the basis of embodiment 1, the tooth profile chamfering device is provided with a second lower die and a second upper die having a third tooth profile structure 11' and detachably connected with the first lower die, the second lower die and the second lower die have a radial cylindrical surface clearance fit, the axial directions of the first lower die and the second lower die are positioned by a bolt 4, and a spring 5 is provided at the end of the bolt 4 for tightening.
Specifically, the inner wall of a hollow sleeve II 1 ' of a lower die II is provided with a groove-shaped structure 22 ', and the hollow sleeve II 1 ' is step-shaped and is sleeved outside a shaft part of a shaft gear; the outer wall of the groove-shaped structure 22 'is provided with a positioning clamping groove 23'; meanwhile, an outer groove type structure 24 'with a positioning hole is arranged on the outer wall of the columnar sleeve II 2' of the lower die II, and the groove type structure 22 'and the outer groove type structure 24' are in clearance fit with each other in the radial direction and are fixed through the bolt 4.
The structure of the second upper die with the third tooth profile structure 11 'and the structure of the second lower die with the fourth tooth profile structure 21' are respectively the same as the structure of the first upper die with the first tooth profile structure 11 and the structure of the first lower die with the second tooth profile structure 21, and the structures are arranged in a centrosymmetric manner. The second upper die and the second lower die are coaxially superposed, the tooth tops of the third tooth profile structure 11 'and the fourth tooth profile structure 21' are fixedly connected through welding, and a gap is formed between the second upper die and the second lower die and is used for positioning gear teeth of a shaft gear to be machined; and the upper die II and the lower die II enclose a placing cavity for forming the gear.
The gear tooth profiles at the two ends of the gear can be exposed outside the device through the arrangement, and the chamfering of the profiles at the two ends of the gear can be finished without multiple times of installation and disassembly.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A tooth profile chamfering device for an axle gear is characterized by comprising a first upper die with a first tooth profile structure and a first lower die with a second tooth profile structure, wherein the first upper die and the first lower die are coaxially overlapped to fixedly connect the tooth tops of the first tooth profile structure and the second tooth profile structure; the upper die I and the lower die I enclose a placing cavity for forming a gear;
the first upper die is a first hollow sleeve, and the first tooth profile structure is arranged on the outer circumferential surface of one end of the first hollow sleeve; the first tooth-profile structure has a tooth-profile dimension less than the normal modulus or the end modulus of the shaft gear;
the lower die is a hollow cylindrical sleeve I, the second tooth profile structure is arranged on the inner circumferential surface of one end of the cylindrical sleeve I, and the tooth profile size of the first tooth profile structure is equal to the normal modulus or the end face modulus of the shaft gear.
2. The tooth profile chamfering apparatus for an axial gear according to claim 1, wherein the hollow sleeve one of the upper die one has a step shape fitted over the shaft portion of the axial gear.
3. The tooth profile chamfering apparatus for an axial gear according to claim 1, wherein the difference in the tooth profile dimension of the first tooth profile structure being smaller than the normal module or the end module of the axial gear is a chamfering dimension factor.
4. The tooth profile chamfering apparatus for an axle gear according to claim 1, wherein the first tooth profile structure and the second tooth profile structure have the same number of teeth as that of the axle gear to be chamfered.
5. The tooth profile chamfering apparatus for an axial gear according to claim 1, wherein the longitudinal length of the first lower die is smaller than the tooth width of the axial gear to be chamfered.
6. The tooth profile chamfering apparatus for an axis gear according to claim 1, wherein an edge of the lower mold is provided with a mounting groove embedded in an axial direction.
7. The tooth profile chamfering apparatus for shaft gears according to any one of claims 1 to 6, further comprising a pressing sleeve structure provided at an end away from the second tooth profile structure, the pressing sleeve structure being provided with a convex portion which is engaged with the mounting groove of the first lower mold and locks the first lower mold by a screw thread.
8. The tooth profile chamfering apparatus for an axle gear according to claim 7, wherein the press bushing structure is a stepped protective bushing, an inner wall of which abuts against an outer wall of the shaft portion of the axle gear.
9. The tooth profile chamfering device for the shaft gear according to any one of claims 1 to 6, further comprising a second lower mold having a fourth tooth profile structure and a second upper mold having a third tooth profile structure, which are detachably connected to the first lower mold, wherein the first lower mold and the second lower mold have a cylindrical surface in a radial direction and are in clearance fit, and the first lower mold and the second lower mold are axially positioned by a pin.
10. The apparatus according to claim 9, wherein the second upper die and the second lower die having the third tooth-profile structure are respectively identical in structure and arranged centrosymmetrically to the first upper die and the second lower die having the first tooth-profile structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020586468.4U CN212191584U (en) | 2020-04-20 | 2020-04-20 | Tooth profile chamfering device for shaft gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020586468.4U CN212191584U (en) | 2020-04-20 | 2020-04-20 | Tooth profile chamfering device for shaft gear |
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| Publication Number | Publication Date |
|---|---|
| CN212191584U true CN212191584U (en) | 2020-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020586468.4U Active CN212191584U (en) | 2020-04-20 | 2020-04-20 | Tooth profile chamfering device for shaft gear |
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| Country | Link |
|---|---|
| CN (1) | CN212191584U (en) |
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2020
- 2020-04-20 CN CN202020586468.4U patent/CN212191584U/en active Active
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