CN210818525U - Finish machining positioner of sprocket hole - Google Patents
Finish machining positioner of sprocket hole Download PDFInfo
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- CN210818525U CN210818525U CN201921673499.7U CN201921673499U CN210818525U CN 210818525 U CN210818525 U CN 210818525U CN 201921673499 U CN201921673499 U CN 201921673499U CN 210818525 U CN210818525 U CN 210818525U
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Abstract
The utility model belongs to the technical field of sprocket processing, especially, relate to a finish machining positioner of sprocket hole, including four-jaw chuck and four tooth pieces, the tail end of four jack catchs on the chuck is close to the center that the chuck was kept away from to the center setting of chuck, head end of jack catch are provided with the arch along the direction of keeping away from the chuck, protruding tail end tip surface is the arcwall face, the center of the circular arc A that the arcwall face is located coincides with the extension line of the central axis of chuck; the front side of each clamping jaw is movably provided with a tooth block, the surface of the end part of the head end of the tooth block is always parallel to and abutted against the surface of the end part of the tail end of the bulge, and the tail end of the tooth block is provided with a tooth part which is tangent to the tooth surface of the pitch circle of the chain wheel; fastening components are detachably arranged on the front sides of the protrusions and the front sides of the tooth blocks. The utility model discloses it is fixed inconvenient problem when the number of teeth can not divide equally to imitate to send out and fix among the prior art among the finish machining equipment the pitch circle of sprocket fixed inefficiency, error easily among the prior art.
Description
Technical Field
The utility model belongs to the technical field of the sprocket processing, especially, relate to a finish machining positioner of sprocket hole.
Background
The heat treatment of the chain wheel generally adopts high-frequency quenching and integral heat treatment quenching of the tooth part. The sprocket is deformed after heat treatment due to the fact that most of the sprocket is provided with lightening holes, and the pitch circle of the tooth part of the sprocket is jumped greatly. The existing gear hobbing process adopts mandrel positioning, belongs to clearance fit and can cause large pitch circle runout. The pitch circle is jumped greatly, and the phenomenon of tightness when can appear the chain after the loading causes the influence to the life-span of chain, and the transmission is unstable.
At present, the problem of large pitch circle run-out can be solved by finely processing the inner hole of the sprocket subjected to heat treatment, but because the number of teeth on some sprockets cannot be equally divided, when the sprocket is fixed on fine processing equipment through a chuck, a structure matched with the chuck cannot be well matched with the pitch circle of the sprocket; when the clamping jaws on the adjusting chuck are used for fixing chain wheels with different sizes or different tooth numbers, the positions of the clamping jaws need to be adjusted, the clamping errors of the clamping jaws are increased, the clamping jaws are poor in fixation, the size of a machined workpiece is not accurate, time is consumed for replacing the clamping jaws and adjusting the positions of the clamping jaws, and the work efficiency is low.
SUMMERY OF THE UTILITY MODEL
According to the not enough of above prior art, the utility model provides a finish machining positioner of sprocket hole, it can effectively solve among the prior art among the finish machining equipment to the pitch circle fixed inefficiency of sprocket, the error is easily sent out and when the number of teeth of sprocket can not divide equally fixed inconvenient problem through simple effectual structure.
The utility model provides a technical scheme that technical problem adopted does: a fine machining positioning device for inner holes of chain wheels comprises a four-jaw chuck and four same tooth blocks, wherein tail ends of four jaws on the chuck are close to the center of the chuck, head ends of the four jaws on the chuck are far away from the center of the chuck, bulges are arranged at the head ends of the jaws along the direction far away from the front side surface of the chuck, the surfaces of the end parts of the bulges are arc-shaped surfaces, and the centers of circular arcs A where the arc-shaped surfaces are located coincide with the extension lines of the central axis of the chuck;
the front side of each clamping jaw is movably provided with a tooth block, the tooth block is arranged between the bulge and the tail end of the clamping jaw, the surface of the end part of the head end of the tooth block is always parallel to and abutted against the surface of the end part of the tail end of the bulge, the tail end of the tooth block is provided with a tooth part, and the tooth part is meshed with an external gear of the chain wheel; the chain wheels with different sizes correspond to tooth blocks with different sizes; the front side of the protrusion and the front side of the tooth block are detachably provided with fastening components, and the fastening components are used for fixing the tooth block and the protrusion together.
Furthermore, a groove with a square longitudinal section is formed in the surface of the end part of the tail end of the protrusion, the groove extends along an arc B, an arc-shaped boss is arranged on the surface of the end part of the head end of the tooth block, the boss extends along an arc C, the circle center of the arc B and the circle center of the arc C are coincided with the circle center of the arc A, and the boss is arranged in the groove in a sliding mode.
Further, the fastening assembly comprises a fastening bolt and a pressing plate, a plurality of blind holes are formed in the front side wall of the protrusion, internal threads are arranged in the blind holes, a plurality of through holes are formed in the head end of the pressing plate, the fastening bolt penetrates through the through holes to be in threaded connection with the blind holes, and the rear side of the tail end of the pressing plate is abutted to the front side of the tooth block.
Further, the number of the blind holes and the number of the through holes are both 2.
Furthermore, the number of teeth of the tooth part of the tooth block is 2-4.
The utility model discloses following beneficial effect has: (1) the end surface of the tail end raised on the clamping jaw is always parallel to and abutted against the end surface of the head end of the tooth block, so that the tooth block can play a self-centering role at any position on the clamping jaw, and the fastening assembly fixes the tooth block and the clamping jaw together after self-centering clamping, and the relative position is unchanged in the chain wheel machining process, so that the machining precision of a workpiece is ensured; (2) the four corresponding tooth blocks on the four clamping jaws have the same structure, and the tooth parts of the tooth blocks are tangent to the tooth surface at the pitch circle of the chain wheel, so that the precision problem of clamping the chain wheel on the four-jaw chuck is solved, and especially when the tooth number of the chain wheel cannot be even and the like, the pitch circle can be positioned by adjusting the position of the tooth blocks relative to the clamping jaws; (3) the position of jack catch need not be adjusted when changing the sprocket of different number of teeth, and the error of reducible jack catch clamping has improved the machining precision, and the specification through changing the tooth piece can the sprocket of the different number of teeth of fast switch-over, has improved work efficiency.
Drawings
Fig. 1 is a schematic front view of an embodiment provided by the present invention;
fig. 2 is a schematic left-side longitudinal sectional view of an embodiment of the present invention;
fig. 3 is a schematic view of a combination of a pawl and a tooth block in an embodiment of the present invention;
FIG. 4 is an enlarged view of the tooth block;
FIG. 5 is a schematic elevational view of a four jaw arrangement;
in the figure: 11. the clamping jaw 12, the protrusion 121, the groove 2, the tooth block 21, the tooth part 22, the boss 3, the chain wheel 41, the fastening bolt 42 and the pressing plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1-5, the fine machining positioning device for the inner hole of the sprocket wheel comprises a four-jaw chuck and four identical tooth blocks 2, the tail ends of four clamping jaws 11 on the chuck are close to the center of the chuck, the head ends of the four clamping jaws 11 are far away from the center of the chuck, the head ends of the clamping jaws 11 are provided with protrusions 12 along the direction far away from the front side surface of the chuck, the end surface of the tail end of each protrusion 12 is an arc-shaped surface, the center of an arc A where the arc-shaped surface is located coincides with the extension line of the central axis of the chuck, and the central axis of the chuck is coaxial with a main shaft on which the chuck;
the front side of each clamping jaw 11 is movably provided with a tooth block 2, the tooth block 2 is arranged between a bulge and the tail end of the clamping jaw, the surface of the end part of the head end of the tooth block 2 is always parallel to and abutted against the surface of the end part of the tail end of the bulge 12, when the tooth block 2 rotates around the center of an arc A relative to the bulge 12, the contact surface of the tooth block 2 and the bulge 12 is always parallel, the surface of the end part of the head end of the tooth block 2 is also an arc-shaped surface and is matched with the arc-shaped surface on the clamping jaw 11, the self-centering effect can be achieved at any position, the tail end of the tooth block 2 is provided with a tooth part 21, and the tooth; the tooth parts 21 of the tooth blocks 2 are used for being meshed with the tooth parts of the chain wheel 3, the four tooth blocks 2 are uniformly distributed on the outermost side of the chain wheel 3 to clamp the chain wheel 3 from four directions, and the chain wheels 3 with different sizes correspond to the tooth blocks 2 with different sizes; the front side of the protrusion 12 and the front side of the tooth block 2 are detachably provided with fastening components for fixing the tooth block 2 and the protrusion 12 together.
When changing not unidimensional sprocket 3, only need not hard up fastening components, change go up with 3 size assorted tooth pieces 2 of sprocket, then fix tooth piece 2 and arch 12 once more through fastening components, can be in order to realize not moving under the condition of jack catch 11, to the fastening of not unidimensional sprocket 3, prevented because the condition that the error that the position of transform jack catch 11 leads to increases. Because only the specification of the gear block 2 is changed, the rapid switching of the chain wheels with different tooth numbers is realized.
Further, a groove 121 with a square longitudinal section is formed in the surface of the tail end of the protrusion 12, the groove 121 extends along an arc B, an arc-shaped boss 22 is arranged on the surface of the head end of the tooth block 2, the boss 22 extends along an arc C, the circle center of the arc B and the circle center of the arc C coincide with the circle center of the arc a, and the boss 22 is slidably arranged in the groove 121.
The boss 22 moves in the groove 121, so that the tooth block 2 cannot be easily separated from the protrusion 12 when the position of the tooth block relative to the protrusion 12 is adjusted, and the operation is more convenient.
Further, the fastening assembly comprises a fastening bolt 41 and a pressing plate 42, a plurality of blind holes are formed in the front side wall of the protrusion 12, internal threads are arranged in the blind holes, a plurality of through holes are formed in the head end of the pressing plate 42, the fastening bolt 41 penetrates through the through holes to be in threaded connection with the blind holes, and the rear side of the tail end of the pressing plate 42 is abutted to the front side of the tooth block 2.
Further, the number of the blind holes and the number of the through holes are both 2.
Further, the number of teeth of the teeth 21 of the tooth block 2 is 2.
The specific using process is as follows: the tooth block matched with the size of the chain wheel to be processed is selected and used, the tooth block is placed between the tail ends of the lug boss and the clamping jaw, the tooth block is abutted to the tail end arc-shaped surface of the lug boss, the chain wheel is placed on the chuck, the position of the tooth block is adjusted to enable the tooth block to be clamped at the pitch circle of the chain wheel, the chuck is clamped tightly, the tooth block is lightly pressed by a pressing plate and a fastening bolt, after the clamping is conducted repeatedly for several times, the pressing plate is tightly pressed on the front side of the tooth block by rotating the fastening bolt, and the position of the tooth block is fixed.
The adjusted device only needs to clamp a workpiece according to a conventional method, only needs to replace the tooth block with a corresponding specification when the product model is replaced, does not need to move the clamping jaw, reduces the probability of error generation, and improves the speed.
The device and the method are simple to use, convenient to adjust, convenient to assemble and disassemble and high in repeated clamping precision.
The above is the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures or equivalent processes that the contents of the specification and the drawings are used for conversion, or directly or indirectly applied to other related technical fields, all the same principles are included in the patent protection scope of the present invention.
Claims (5)
1. The utility model provides a finish machining positioner of sprocket hole which characterized in that: the clamping device comprises a four-jaw chuck and four same tooth blocks, wherein the tail ends of four clamping jaws on the chuck are close to the center of the chuck, the head ends of the four clamping jaws on the chuck are far away from the center of the chuck, the head ends of the clamping jaws are provided with bulges along the direction far away from the front side surface of the chuck, the surfaces of the tail end parts of the bulges are arc surfaces, and the centers of circular arcs A where the arc surfaces are located coincide with the extension lines of the central axis of the chuck;
the front side of each clamping jaw is movably provided with a tooth block, the tooth block is arranged between the bulge and the tail end of the clamping jaw, the surface of the end part of the head end of the tooth block is always parallel to and abutted against the surface of the end part of the tail end of the bulge, the tail end of the tooth block is provided with a tooth part, and the tooth part is meshed with an external gear of the chain wheel; the chain wheels with different sizes correspond to tooth blocks with different sizes; the front side of the protrusion and the front side of the tooth block are detachably provided with fastening components, and the fastening components are used for fixing the tooth block and the protrusion together.
2. A sprocket hole finishing positioning device as defined in claim 1, wherein: the novel gear rack is characterized in that a groove with a square longitudinal section is formed in the surface of the end part of the tail end of the protrusion, the groove extends along an arc B, an arc-shaped boss is arranged on the surface of the end part of the head end of the gear block, the boss extends along an arc C, the circle center of the arc B and the circle center of the arc C coincide with the circle center of the arc A, and the boss is arranged in the groove in a sliding mode.
3. A sprocket hole finishing positioning device as defined in claim 1 or 2, wherein: the fastening assembly comprises a fastening bolt and a pressing plate, a plurality of blind holes are formed in the front side wall of the protrusion, internal threads are arranged in the blind holes, a plurality of through holes are formed in the head end of the pressing plate, the fastening bolt penetrates through the through holes to be in threaded connection with the blind holes, and the rear side of the tail end of the pressing plate is abutted to the front side of the tooth block.
4. A sprocket hole finishing positioning device as defined in claim 3, wherein: the number of the blind holes and the number of the through holes are both 2.
5. A sprocket hole finishing positioning device as defined in claim 1, wherein: the number of teeth arranged on the tooth part of the tooth block is 2-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921673499.7U CN210818525U (en) | 2019-10-09 | 2019-10-09 | Finish machining positioner of sprocket hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921673499.7U CN210818525U (en) | 2019-10-09 | 2019-10-09 | Finish machining positioner of sprocket hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210818525U true CN210818525U (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921673499.7U Active CN210818525U (en) | 2019-10-09 | 2019-10-09 | Finish machining positioner of sprocket hole |
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| CN (1) | CN210818525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007322A (en) * | 2021-03-04 | 2021-06-22 | 陕西法士特汽车传动集团有限责任公司 | Gear rapid positioning and mounting method based on four-grab |
-
2019
- 2019-10-09 CN CN201921673499.7U patent/CN210818525U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007322A (en) * | 2021-03-04 | 2021-06-22 | 陕西法士特汽车传动集团有限责任公司 | Gear rapid positioning and mounting method based on four-grab |
| CN113007322B (en) * | 2021-03-04 | 2022-04-15 | 陕西法士特汽车传动集团有限责任公司 | Gear rapid positioning and mounting method based on four-grab |
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