CN220862918U - Pitch circle positioning claw suitable for finish turning of cylindrical gear - Google Patents
Pitch circle positioning claw suitable for finish turning of cylindrical gear Download PDFInfo
- Publication number
- CN220862918U CN220862918U CN202322354683.8U CN202322354683U CN220862918U CN 220862918 U CN220862918 U CN 220862918U CN 202322354683 U CN202322354683 U CN 202322354683U CN 220862918 U CN220862918 U CN 220862918U
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- positioning
- pitch circle
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- gear
- positioning element
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- 210000000078 claw Anatomy 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 5
- 238000003754 machining Methods 0.000 abstract description 3
- 210000001847 jaw Anatomy 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005255 carburizing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 210000003781 tooth socket Anatomy 0.000 description 1
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- Gripping On Spindles (AREA)
- Gear Processing (AREA)
Abstract
The utility model belongs to the technical field of machining, and particularly relates to a pitch circle positioning claw suitable for finish turning of a cylindrical gear. The pitch circle positioning clamping claws are three uniformly distributed along the circumference; each pitch circle positioning claw is provided with an L-shaped body; the body is arranged on a chuck of the numerical control lathe; the method is characterized in that: the body is provided with a through hole for installing the positioning element; the positioning element is arranged in the through hole of the body and can rotate around the axis of the through hole; the lower end of the positioning element protrudes out of the through hole on the body, and the end surface of the positioning element is provided with a rack tooth-shaped positioning bulge protruding downwards; the rack and rack tooth-shaped positioning protrusions are matched with the end face of the gear to realize positioning. The positioning mode adopted by the utility model has simple structure, the positioning is direct and effective, the positioning accords with the pitch circle positioning principle, and the pitch circle positioning of the cylindrical gears with different moduli and helix angles can be realized by changing and adjusting different positioning elements.
Description
Technical Field
The utility model belongs to the technical field of machining, and particularly relates to a pitch circle positioning claw suitable for finish turning of a cylindrical gear.
Background
The high-hardness tooth surface gear generally adopts a heat treatment method such as carburizing and quenching to obtain higher tooth surface hardness; according to the technological requirements, after carburizing and quenching, the gear is finish-machined, and in order to ensure the precision of finish-machining, the pitch circle of the gear is required to be aligned to machine the inner hole and the end face of the gear; in the prior art, the main clamping addendum circle is used for finish turning the inner hole and the end face of the gear, and no direct action relation exists in the meshing transmission of the gear, so that the gear is not suitable for being used as a positioning reference, and the efficiency of the clamping addendum circle is low in a single-piece alignment mode.
The involute gear is in meshing transmission mainly through contact of involute gear surfaces; therefore, the semi-finishing of the inner hole and the end face by adopting the pitch circle positioning is a good method.
It is known that various related industries are continuously updating and optimizing gear clamps, and the design principles of pitch circle clamps are roughly divided into three types: (1) The simple pitch circle clamp mainly utilizes a general four-jaw chuck, a three-jaw chuck and a needle roller matching mode; (2) The method is realized by adopting a curved surface self-locking matching positioning steel ball mode; (3) The elastic sleeve is matched with the steel ball or the rolling pin to realize an effective positioning mode.
The positioning mode is realized by putting a round bar (phi d 1) or a round ball into a tooth socket of a gear and matching with an elastic jacket or a three-jaw chuck, as shown in figure 1. The sphere or the round bar positions the pitch circle, which belongs to tooth-shaped positioning, namely 'approximate pitch circle positioning', in principle, but is not true pitch circle positioning, and the pitch circle can only be generated by meshing in nature.
Disclosure of utility model
The utility model aims to provide a pitch circle positioning claw suitable for finish turning of a cylindrical gear, which adopts a rack profile, namely an involute of a gear with infinite base circle.
The utility model adopts the following technical scheme for accomplishing the purposes:
The pitch circle positioning clamping claws are used for finish turning of the cylindrical gear, and are three uniformly distributed along the circumference; each pitch circle positioning claw is provided with an L-shaped body; the body is arranged on a chuck of the numerical control lathe; the body is provided with a through hole for installing the positioning element; the positioning element is arranged in the through hole of the body and can rotate around the axis of the through hole; the lower end of the positioning element protrudes out of the through hole on the body, and the end surface of the positioning element is provided with a rack tooth-shaped positioning bulge protruding downwards; the rack and rack tooth-shaped positioning protrusions are matched with the end face of the gear to realize positioning.
The positioning element is provided with an annular groove for installing a set screw; the top end of the set screw is screwed into the annular groove.
The body on be provided with square location key and screw hole.
The pitch circle positioning claw suitable for the finish turning of the cylindrical gear adopts the tooth-shaped positioning bulge of the rack, the rack molded line is the involute of the gear with infinite base circle, the claw is meshed with the gear to be processed through the rack, the meshing principle of the involute is met, the true pitch circle positioning is realized, the structure is simple, the pitch circle positioning is direct and effective, and the pitch circle positioning of the cylindrical gears with different diameters, moduli and helix angles can be realized.
Drawings
Fig. 1 is a schematic view of a prior art "pitch circle" positioning structure.
Fig. 2 is a schematic structural view of the present utility model.
Fig. 3 is a side view of fig. 2.
Fig. 4 is a schematic structural view of a positioning element in the present utility model.
Fig. 5 is a use state diagram of the present utility model.
In the figure 1: the body, 2, the location arch, 3, holding screw.
Detailed Description
The present utility model will be described with reference to the accompanying drawings and specific embodiments, in which the three-jaw chuck is referred to, and the structures thereof are all structures existing in the prior art, and will not be described in detail herein.
Pitch circle positioning claw suitable for finish turning of cylindrical gear: the three-jaw chuck is provided with three positioning jaws which are pitch circles; the pitch circle positioning claw is composed of a body 1, a positioning element 2 and a set screw 3 as shown in fig. 1 and 2, wherein the end surface of the positioning element 2 is provided with a rack tooth-shaped positioning bulge, and the size of the rack tooth-shaped positioning bulge is calculated according to the modulus of a gear to be processed; the positioning element 2 is arranged in the hole of the body 1 and can rotate around the axis of the hole so as to realize the cooperation with different helix angle gears; the positioning element 2 is provided with an annular groove, and the top end of the set screw 3 is screwed into the annular groove to prevent the positioning element 2 from falling out.
The three "pitch circle" positioning jaws are mounted on the chuck of the lathe by square positioning keys and screw holes arranged on the body 1 as shown in fig. 1 and using screws as shown in fig. 4. Radial expansion and contraction of a pitch circle positioning claw are controlled through a chuck, and the pitch circle positioning claw is meshed with an involute gear surface of a gear to be processed to form gear pitch circle positioning; the circle center of the geometric circle where the meshing points of the three pitch circle positioning claws and the processed gear are positioned coincides with the circle center of the pitch circle of the processed gear; i.e. coincides with the centre of rotation of the three jaw chuck of the lathe.
The positioning mode adopted by the utility model has a simple structure, and the pitch circle positioning is direct and effective, so that the pitch circle positioning of cylindrical gears with different diameters, moduli and helix angles can be realized. (see FIG. 5)
Claims (3)
1. The pitch circle positioning clamping claws are used for finish turning of the cylindrical gear, and are three uniformly distributed along the circumference; each pitch circle positioning claw is provided with an L-shaped body; the body is arranged on a chuck of the numerical control lathe; the method is characterized in that: the body is provided with a through hole for installing the positioning element; the positioning element is arranged in the through hole of the body and can rotate around the axis of the through hole; the lower end of the positioning element protrudes out of the through hole on the body, and the end surface of the positioning element is provided with a rack tooth-shaped positioning bulge protruding downwards; the rack tooth-shaped positioning protrusion is matched with the end face of the gear to realize positioning.
2. A pitch circle positioning jaw for finish turning of a cylindrical gear as claimed in claim 1, wherein: the positioning element is provided with an annular groove for installing a set screw; the top end of the set screw is screwed into the annular groove.
3. A pitch circle positioning jaw for finish turning of a cylindrical gear as claimed in claim 1, wherein: the body on be provided with square location key and screw hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354683.8U CN220862918U (en) | 2023-08-31 | 2023-08-31 | Pitch circle positioning claw suitable for finish turning of cylindrical gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322354683.8U CN220862918U (en) | 2023-08-31 | 2023-08-31 | Pitch circle positioning claw suitable for finish turning of cylindrical gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220862918U true CN220862918U (en) | 2024-04-30 |
Family
ID=90815795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322354683.8U Active CN220862918U (en) | 2023-08-31 | 2023-08-31 | Pitch circle positioning claw suitable for finish turning of cylindrical gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220862918U (en) |
-
2023
- 2023-08-31 CN CN202322354683.8U patent/CN220862918U/en active Active
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| GR01 | Patent grant | ||
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