CN212020751U - Circle center positioning tool - Google Patents
Circle center positioning tool Download PDFInfo
- Publication number
- CN212020751U CN212020751U CN202020576898.8U CN202020576898U CN212020751U CN 212020751 U CN212020751 U CN 212020751U CN 202020576898 U CN202020576898 U CN 202020576898U CN 212020751 U CN212020751 U CN 212020751U
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- arm
- fixing base
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- driving arm
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Abstract
The utility model provides a centre of a circle positioning tool, includes fixing base, pilot pin, a pair of driving arm and a pair of driven arm and the gangbar that can move about from top to bottom, the pilot pin is located the below of fixing base, its upper end with the fixing base is fixed, a pair of driving arm and a pair of driven arm are all followed the location is symmetrical arrange in the both sides of fixing base, the stiff end of driving arm and driven arm all with the fixing base is articulated, and interval arrangement about the two, and the driving arm and the driven arm of homonymy are through being connected with both articulated connecting rods, and the connecting rod of both sides is symmetrical each other, the gangbar passes the connecting rod of both sides, and with the pilot pin is perpendicular. The utility model discloses positioning tool can find accurate centre of a circle position on the work piece to convenient operation.
Description
Technical Field
The utility model belongs to the technical field of the centre of a circle location, especially, relate to a centre of a circle positioning tool.
Background
After some workpieces are machined, the position of the circle center needs to be found out on the workpieces, so that subsequent machining is carried out. For example, after the spinneret is processed, the position of the center of a circle needs to be found on the spinneret surface, so as to punch the spinneret hole.
The position of the centre of a circle is often found through artifical measurement to traditional mode, and is accurate inadequately.
SUMMERY OF THE UTILITY MODEL
Based on this, to the above technical problem, a circle center positioning tool is provided.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a centre of a circle positioning tool, includes fixing base, pilot pin, a pair of driving arm and a pair of driven arm and the gangbar that can move about from top to bottom, the pilot pin is located the below of fixing base, its upper end with the fixing base is fixed, a pair of driving arm and a pair of driven arm are all followed the location is symmetrical arrange in the both sides of fixing base, the stiff end of driving arm and driven arm all with the fixing base is articulated, and interval arrangement about the two, and the driving arm and the driven arm of homonymy are through being connected with both articulated connecting rods, and the connecting rod of both sides is symmetrical each other, the gangbar passes the connecting rod of both sides, and with the pilot pin is perpendicular.
The driving arm and the driven arm on the same side are arranged in parallel from top to bottom, the driven arm is shorter than the driving arm, the connecting rod is parallel to the positioning needle, one end of the connecting rod is hinged to the free end of the driven arm, and the other end of the connecting rod is hinged to the middle of the driving arm.
The driving arm is positioned at the lower side of the driven arm.
The positioning needle is fixed on the fixed seat in an adjustable manner in the vertical position.
The upper end of the positioning needle is in threaded connection with the fixed seat.
The lower end of the positioning needle forms a tip.
The fixing seat is in a block shape.
The positioning needle is provided with a groove for the linkage rod to move up and down, and the linkage rod penetrates through the groove.
The utility model discloses positioning tool can find accurate centre of a circle position on the work piece to convenient operation.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the present invention.
Detailed Description
As shown in fig. 1, a circle center positioning tool includes a fixing base 110, a positioning needle 120, a pair of driving arms 130, a pair of driven arms 140, and a linkage rod 150.
The positioning pin 120 is located below the fixing base 110, and the upper end thereof is fixed to the fixing base 110.
The pair of driving arms 130 and the pair of driven arms 140 are symmetrically arranged at two sides of the fixing base 110 along the positioning pin 120, the fixed ends of the driving arms 130 and the driven arms 140 are hinged to the fixing base 110, so that the driving arms 130 and the driven arms 140 can move up and down, the driving arms 130 and the driven arms 140 are arranged at intervals up and down, the driving arms 130 and the driven arms 140 at the same side are connected through connecting rods 160 hinged to the driving arms 130 and the driven arms 140, and the connecting rods 160 at two sides are symmetrical to each other.
The linkage rod 150 passes through the links 160 at both sides and is perpendicular to the positioning pin 120.
As shown in fig. 1 and 2, when in use, the driving arm 130 on one side is opened, and the driving arm 130 on the other side is opened by the same angle under the action of the linkage rod 150, so that the distance from the lower end of the positioning needle 120 to the free ends of the two driving arms 130 can be controlled to be equal, and at this time, the position where the lower end of the positioning needle 120 contacts with the workpiece is the center of a circle.
In the embodiment, the fixing base 110 has a block shape.
In this embodiment, the driving arm 130 and the driven arm 140 on the same side are arranged in parallel up and down, the driven arm 140 is shorter than the driving arm 130, the connecting rod 160 is parallel to the positioning pin 120, and one end thereof is hinged to the free end of the driven arm 140, and the other end thereof is hinged to the middle of the driving arm 130.
Specifically, the master arm 130 is located on the lower side of the slave arm 140.
In this embodiment, the positioning pin 120 is fixed on the fixing base 110 in a vertically adjustable manner.
Specifically, the upper end of the positioning pin 120 is in threaded connection with the fixing seat 110, so that the up-down position is adjustable.
Preferably, in order to further locate the circle center, the lower end of the positioning pin 120 forms a tip 121, and after the circle center position is determined, the positioning pin 120 can be forced downwards to mark the workpiece through the tip 121.
In this embodiment, the positioning pin 120 has a slot 122 for the linkage rod 150 to move up and down, and the linkage rod 150 passes through the slot 122.
However, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention and not used as a limitation of the present invention, and that the changes and modifications to the above embodiments are within the scope of the appended claims as long as they are within the true spirit of the present invention.
Claims (8)
1. The utility model provides a centre of a circle positioning tool, its characterized in that includes fixing base, pilot pin, a pair of driving arm and a pair of driven arm and the gangbar of activity from top to bottom, the pilot pin is located the below of fixing base, its upper end with the fixing base is fixed, a pair of driving arm and a pair of driven arm are all followed the location is symmetrical arrange in the both sides of fixing base, the stiff end of driving arm and driven arm all with the fixing base is articulated, and interval arrangement about the two, and the driving arm and the driven arm of homonymy are through being connected with both articulated connecting rods, and the connecting rod of both sides is symmetrical each other, the gangbar passes the connecting rod of both sides, and with the pilot pin is perpendicular.
2. The tool of claim 1, wherein the driving arm and the driven arm are parallel to each other, the driven arm is shorter than the driving arm, the connecting rod is parallel to the positioning pin, and one end of the connecting rod is hinged to a free end of the driven arm while the other end is hinged to a middle portion of the driving arm.
3. A tool as claimed in claim 2 wherein the master arm is located on the underside of the slave arm.
4. The tool of claim 1 or 3, wherein the positioning pin is fixed on the fixing base in a vertically adjustable manner.
5. The tool of claim 4, wherein the upper end of the positioning pin is threadedly connected to the fixing base.
6. The tool of claim 5, wherein the lower end of the positioning pin forms a tip.
7. The tool of claim 6, wherein the holder is block-shaped.
8. The tool of claim 7, wherein the positioning pin has a slot for the linkage rod to move up and down, and the linkage rod passes through the slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020576898.8U CN212020751U (en) | 2020-04-17 | 2020-04-17 | Circle center positioning tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020576898.8U CN212020751U (en) | 2020-04-17 | 2020-04-17 | Circle center positioning tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212020751U true CN212020751U (en) | 2020-11-27 |
Family
ID=73493850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020576898.8U Active CN212020751U (en) | 2020-04-17 | 2020-04-17 | Circle center positioning tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212020751U (en) |
-
2020
- 2020-04-17 CN CN202020576898.8U patent/CN212020751U/en active Active
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