CN210499356U - Straight bevel gear flank of tooth positioning fixture - Google Patents
Straight bevel gear flank of tooth positioning fixture Download PDFInfo
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- CN210499356U CN210499356U CN201921154283.XU CN201921154283U CN210499356U CN 210499356 U CN210499356 U CN 210499356U CN 201921154283 U CN201921154283 U CN 201921154283U CN 210499356 U CN210499356 U CN 210499356U
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- bevel gear
- straight bevel
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Abstract
The utility model belongs to the technical field of clamps, in particular to a tooth surface positioning clamp for a straight bevel gear; the clamp comprises a clamp body, wherein a plurality of tooth grooves are formed in the clamp body, each tooth groove is formed in a gear tooth shape on a straight bevel gear, two tooth surfaces of each tooth groove are planes, an alignment cylinder with the diameter smaller than that of the clamp body is arranged above the clamp body, a pull rod through hole is formed in the middle of the clamp body, and a plurality of clamp fixing holes are uniformly distributed on the clamp body around the pull rod through hole; the positioning fixture has the advantages of high positioning precision, firm clamping and convenience in assembly and disassembly, and effectively solves the problem that the positioning precision is not high by using a steel ball positioning fixture and an involute tooth surface positioning fixture.
Description
Technical Field
The utility model belongs to the technical field of anchor clamps, concretely relates to straight-tooth bevel gear flank of tooth positioning fixture.
Background
The straight bevel gear is an important part of an automobile differential, and the straight bevel gear for the automobile generally adopts a manufacturing process of firstly precisely forging gear teeth and then machining installation reference surfaces (end surfaces and inner holes) by using a tooth surface positioning clamp positioning machine. The precision of the tooth surface positioning clamp directly influences the machining precision of the installation reference surface of the straight bevel gear, and the machining precision of the installation reference surface of the gear adversely influences the gear precision. At present, a steel ball positioning fixture or an involute tooth surface positioning fixture is usually used for positioning and clamping when a straight bevel gear mounting reference surface is machined by manufacturers, and the positioning accuracy of the two fixtures is not high, so that the gear accuracy of the straight bevel gear is directly reduced.
In the prior art, patent document 1 with publication number CN304570067U discloses a grinding half-axle gear clamp, and patent document 2 with publication number CN304699996U discloses a bevel gear tooth surface positioning clamp, wherein patent document 1 uses 4 steel balls to position a half-axle gear, and has the disadvantages that the gear teeth are in point contact with the tooth surface of the steel balls, the contact area is small, the number of positioning points is small, and the positioning accuracy of the half-axle gear is not high. Patent document 2 uses ball head locating pin location bevel gear, and the teeth of a cogwheel and ball head locating pin point contact, though the setpoint is more, still have the problem that area of contact is little and the location is not enough, and this kind of body structure's anchor clamps precision is difficult to guarantee moreover, and bevel gear's positioning accuracy is not high.
Disclosure of Invention
In order to overcome the problem, the utility model provides a straight bevel gear flank of tooth positioning fixture, this positioning fixture adopt integral many tooth structures, and the both sides face of anchor clamps tooth's socket is the plane, has solved the not high problem of current straight bevel gear flank of tooth positioning fixture positioning accuracy.
A tooth surface positioning clamp for a straight bevel gear comprises a clamp body 1, wherein a plurality of tooth grooves 2 are formed in the clamp body, each tooth groove 2 is formed in a gear shape on a straight bevel gear 9, two tooth surfaces 3 of each tooth groove 2 are both planes, and the number of the tooth grooves 2 is equal to the number of teeth of the straight bevel gear 9;
the top of the anchor clamps body 1 is equipped with the alignment cylinder 4 that the diameter is less than anchor clamps body 1, and the middle part of the anchor clamps body 1 is equipped with pull rod through-hole 5, and anchor clamps body 1 goes up around pull rod through-hole 5 evenly distributed has a plurality of anchor clamps fixed orifices 6.
The utility model has the advantages that:
when the positioning fixture is used for positioning the straight bevel gear, the contact mode between the gear teeth on the straight bevel gear and the gear grooves on the positioning fixture is linear contact and multi-tooth contact, so that the positioning fixture has the advantages of high positioning precision, firm clamping and convenience in assembly and disassembly, and the problem that the positioning precision is low when a steel ball positioning fixture and an involute tooth surface positioning fixture are used is effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the assembly schematic diagram of the present invention and a straight bevel gear.
Fig. 3 is a cross-sectional view of the tooth space of the present invention in contact with the teeth of a straight bevel gear.
Fig. 4 is a partially enlarged schematic view of fig. 3.
Wherein: 1 fixture body, 2 tooth grooves, 3 tooth surfaces, 4 alignment cylinders, 5 pull rod through holes, 6 fixture fixing holes, 7 tooth crests, 8 tooth roots and 9 straight bevel gears.
Detailed Description
As shown in fig. 1, a positioning fixture for tooth surfaces of a straight bevel gear comprises a fixture body 1, wherein 14 tooth grooves 2 are formed in the fixture body, each tooth groove 2 is formed in a shape of a gear tooth on a straight bevel gear 9, two tooth surfaces 3 on two sides of each tooth groove 2 are planes, and the number of the tooth grooves 2 is equal to the number of teeth of the straight bevel gear 9;
the top of the clamp body 1 is provided with an alignment cylinder 4 with the diameter smaller than that of the clamp body 1, and the alignment cylinder is used for alignment and centering when the clamp is used, the middle part of the clamp body 1 is provided with a pull rod through hole 5 and used as a channel for clamping a pull rod, and three clamp fixing holes 6 are uniformly distributed on the clamp body 1 around the pull rod through hole 5 and used for fixing the clamp body 1 on a chuck of a numerical control machine.
As shown in fig. 2, 3 and 4, when the spur bevel gear 9 is mounted to the chuck body 1, the tooth crest 7 of each tooth space 2 of the chuck body 1 is spaced from the tooth root of the corresponding tooth on the spur bevel gear 9 by a distance of 1 to 3mm, and the tooth root 8 of each tooth space 2 of the chuck body 1 is spaced from the tooth crest of the corresponding tooth on the spur bevel gear 9 by a distance of 1 to 3 mm.
The fixture body 1 is a cylinder.
The clamping and processing process of the straight bevel gear 9 on the clamp body 1 is to utilize a hydraulic clamping system of a numerical control machine tool to drive a pressure plate on the hydraulic clamping system to compress a non-processing surface of the straight bevel gear 9 through retraction of a pull rod on the hydraulic clamping system. And then, machining the installation reference of the straight bevel gear 9, and when the machining is finished, extending the pull rod to detach the workpiece.
Because the fixture body 1 is of an integral structure, the tooth surfaces 3 of the tooth grooves 2 are planes, and the number of the tooth grooves 2 is equal to that of the straight bevel gear 9, the contact modes between the involute tooth surfaces of the straight bevel gear 9 and the tooth surfaces 3 of the tooth grooves 2 corresponding to the fixture body 1 are line contact and multi-tooth contact, the positioning mode has no over-positioning or under-positioning, and the positioning precision is high.
Claims (1)
1. A tooth surface positioning clamp for a straight bevel gear is characterized by comprising a clamp body (1), wherein a plurality of tooth grooves (2) are formed in the clamp body, each tooth groove (2) is formed in a groove shape according to the shape of a gear tooth on the straight bevel gear (9), two tooth surfaces (3) of each tooth groove (2) are planes, and the number of the tooth grooves (2) is equal to the number of the tooth surfaces of the straight bevel gear (9); the top of the fixture body (1) is provided with an alignment cylinder (4) with a diameter smaller than that of the fixture body (1), the middle of the fixture body (1) is provided with a pull rod through hole (5), and a plurality of fixture fixing holes (6) are uniformly distributed on the fixture body (1) around the pull rod through hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921154283.XU CN210499356U (en) | 2019-07-23 | 2019-07-23 | Straight bevel gear flank of tooth positioning fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921154283.XU CN210499356U (en) | 2019-07-23 | 2019-07-23 | Straight bevel gear flank of tooth positioning fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210499356U true CN210499356U (en) | 2020-05-12 |
Family
ID=70584616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921154283.XU Active CN210499356U (en) | 2019-07-23 | 2019-07-23 | Straight bevel gear flank of tooth positioning fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210499356U (en) |
-
2019
- 2019-07-23 CN CN201921154283.XU patent/CN210499356U/en active Active
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