CN215788427U - Direct-push locking type zero point positioning mechanism - Google Patents
Direct-push locking type zero point positioning mechanism Download PDFInfo
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- CN215788427U CN215788427U CN202122000379.4U CN202122000379U CN215788427U CN 215788427 U CN215788427 U CN 215788427U CN 202122000379 U CN202122000379 U CN 202122000379U CN 215788427 U CN215788427 U CN 215788427U
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- ejector rod
- upper cover
- positioning mechanism
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Abstract
The utility model relates to a direct-push locking type zero point positioning mechanism, which solves the problems that the existing universal clamping tool is poor in precision and the existing zero point positioning mechanism is unstable. This mechanism includes the upper cover of disc type, and the axis department of upper cover is provided with the mesopore that supplies the zero point round pin to insert the location, its characterized in that: the upper cover ring is provided with a plurality of ejector rod holes which are communicated with the middle hole and the outer wall of the upper cover ring, the upper cover is sequentially provided with an annular pressurizing air channel and an annular loosening air channel from outside to inside by taking the middle shaft as an axis, the pressurizing air channel and the loosening air channel are respectively communicated with the ejector rod holes, a step-shaped ejector rod with a large outer part and a small inner part is arranged in each ejector rod hole, the outer end of each ejector rod is a piston section matched with the inner wall of the corresponding ejector rod hole, the piston section is located between the pressurizing air channel and the loosening air channel, and the inner end of each ejector rod extends out to the middle hole to abut against the zero pin. The utility model adopts the annular pressurizing air path to perform the direct-pushing locking on the zero point pin with uniform stress in all directions, and has simple structure and balanced and stable locking force.
Description
Technical Field
The utility model belongs to the field of clamping and positioning tools, relates to a zero point positioning tool, and particularly relates to a direct-push locking type zero point positioning mechanism.
Background
At present, the positioning and clamping for machining are mainly universal clamping and positioning tools, and the special tool is considered to be used only when a product is single. The special tool needs to spend a large amount of time when the product is switched and the model is changed, and needs to be installed in the process of stopping the equipment, so that the efficiency is low. Due to the fact that the positioning accuracy of the universal tool is poor during batch production, measurement and meter-making confirmation are required to be carried out again every time clamping is carried out, the production capacity of equipment is greatly wasted, and production cost is increased. The processing of characteristics on a plurality of faces of a part on a common three-axis or four-axis needs to be clamped for many times and the reference is measured again, so that the efficiency and the quality of a product are directly influenced.
In addition, for precision parts in the machining process, due to the fact that the universal tool is poor in mounting and positioning accuracy, the universal tool cannot be detached for measurement, mounting and machining are carried out again according to measurement data, and the precision and the quality of the machined parts are affected. With the development of machining technology, a zero point positioning system is applied to clamping and positioning of a high-precision workpiece, a zero point pin is arranged after the workpiece to be machined is determined to be zero, and the zero point pin is clamped into the zero point positioning system to quickly find and clamp the workpiece when different machine tools and processes are transferred, so that zero point positioning is completed, positioning time is saved, and production efficiency is improved. The existing zero-point clamping structure generally adopts a clamping mode that a spring pushes a piston, and the piston synchronously pushes balls in all directions, for example, a Chinese patent No. CN207824499U published in 2018, 9, 7 and named as a machining center zero-point positioning system. After the piston is used for a long time, the synchronicity of the piston synchronous driving in all directions is poor, and the locking process and the loosening process are not favorable for stable positioning due to the rolling performance of the balls in all directions in a ball clamping mode.
Disclosure of Invention
The utility model aims to solve the problems that the existing universal clamping tool is poor in precision and the existing zero point positioning mechanism is unstable, and provides a direct-push locking type zero point positioning mechanism which adopts a zero point positioning mode of ejection of an ejector rod, air pressure control locking and loosening, and has the advantages of simple structure, quick control response and good uniformity of clamping force in all directions.
The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a push directly locking formula zero point positioning mechanism, includes the upper cover of disc type, and the axis department of upper cover is provided with the mesopore that supplies the zero point round pin to insert the location, its characterized in that: the upper cover ring is provided with a plurality of ejector rod holes which are communicated with the middle hole and the outer wall of the upper cover ring, the upper cover is sequentially provided with an annular pressurizing air channel and an annular loosening air channel from outside to inside by taking the middle shaft as an axis, the pressurizing air channel and the loosening air channel are respectively communicated with the ejector rod holes, a step-shaped ejector rod with a large outer part and a small inner part is arranged in each ejector rod hole, the outer end of each ejector rod is a piston section matched with the inner wall of the corresponding ejector rod hole, the piston section is located between the pressurizing air channel and the loosening air channel, and the inner end of each ejector rod extends out to the middle hole to abut against the zero pin. The zero point pin is provided with an annular groove, the device is ejected out through the ejector rod to the middle hole to clamp the zero point pin, the middle hole is an upwards-expanded conical opening, and the zero point pin is downwards inserted and positioned once. The annular pressurizing air path can uniformly provide locking force for the ejector rods, and the annular pressurizing air path is communicated with the air path, so that the locking air pressure borne by each ejector rod is the same, and the ejector rods are uniform in all directions. After the machining is finished, the pressurizing air path is deflated, the air path is loosened for air supply, the ejector rod is pushed back outwards, the zero point pin can be easily disengaged, and the workpiece is prevented from being damaged when the workpiece is taken out due to incomplete unloading.
Preferably, the circumference of the piston section of the ejector rod is provided with an ejector rod outer sealing ring, and the circumference of the inner end of the ejector rod is provided with an ejector rod inner sealing ring.
Preferably, the outer end of the ejector rod hole is provided with an internal thread and a threaded plug in a screwed mode, and a compression spring is arranged between the threaded plug and the outer end of the ejector rod in a propping mode. The thread plug can adjust the tightness to control the initial thrust of ejector pin.
Preferably, a threaded plug outer sealing ring is arranged between the outer end of the threaded plug and the wall of the ejector rod hole.
Preferably, the ejector rod hole is a stepped hole with a large outer part and a small inner part, and the inner end of the ejector rod is matched with the small inner end hole of the ejector rod hole.
Preferably, the inner end of the ejector rod is a ball head.
Preferably, the bottom surface of the upper cover is buckled with an annular outer gas path welding cover plate for closing the bottom surface of the pressurization gas path and an annular inner gas path welding cover plate for closing and loosening the bottom surface of the gas path.
Preferably, the side wall of the upper cover is provided with a pressurization external air source interface communicated with the pressurization air path and a loosening external air source interface communicated with the loosening air path.
Preferably, a plurality of through holes are formed between two end faces of the upper cover, the number of the through holes is consistent with that of the ejector rod holes, the through holes are alternately and uniformly arranged, the through holes are arranged around the middle shaft and close to the outer ring of the upper cover, and bolts used for installing the upper cover are arranged in the through holes.
Preferably, the through hole is a counter bore, and the bolt is a hexagon socket head cap screw.
The utility model adopts the annularly communicated pressurizing air passage to match with the ejector rods which are respectively and independently and radially arranged on the circumference, and directly pushes and locks the zero point pin with uniform stress in each direction, the structure is simple, the locking force is balanced and stable, and the workpiece is prevented from being damaged by loosening the air passage to release the force and back the zero point pin after the processing is finished.
Drawings
The utility model is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of the whole of the present invention.
Fig. 2 is a bottom view of the overall structure of the present invention.
Figure 3 is a cut-away view of the structure of the present invention.
Fig. 4 is a sectional view of the pressurizing gas circuit of the structure of the utility model.
FIG. 5 is a cut-away view of the release air path of the inventive structure.
Fig. 6 is an exploded view of the present invention as a whole.
In the figure: 1. an upper cover; 2. a top rod; 3. a compression spring; 4. a threaded plug; 5. welding a cover plate on the outer air passage; 6. welding a cover plate on the inner air path; 7. an inner sealing ring of the ejector rod; 8. the outer sealing ring of the ejector rod; 9. the thread plug is provided with an outer sealing ring; 10. a hexagon socket head cap screw; 11. a zero point pin; 12. loosening an external air source interface; 13. pressurizing and connecting an external air source interface; 14. a pressurization gas circuit; 15. and (5) loosening the air passage.
Detailed Description
The utility model is further illustrated by the following specific examples in conjunction with the accompanying drawings.
Example (b): a direct-push locking type zero point positioning mechanism, as shown in figures 1, 2 and 6. The mechanism comprises a disc-shaped upper cover 1, a middle hole for inserting and positioning a zero point pin 11 is formed in the middle shaft of the upper cover, a plurality of ejector rod holes communicated with the middle hole and the outer wall of the periphery of the upper cover are uniformly formed in the periphery of the upper cover, an annular pressurizing air path 14 and an annular loosening air path 15 are sequentially formed in the upper cover 1 from outside to inside by taking the middle shaft as an axis, and the pressurizing air path 14 and the loosening air path 15 are respectively communicated with the ejector rod holes. The bottom surface of the upper cover 1 is buckled with an annular outer gas path welding cover plate 5 for closing the bottom surface of the pressurizing gas path 14 and an annular inner gas path welding cover plate 6 for closing and loosening the bottom surface of the gas path 15. As shown in fig. 4, 5 and 6, the side wall of the upper cover 1 is provided with a pressurization external air source interface 13 communicated with a pressurization air path 14 and a release external air source interface 12 communicated with a release air path 15.
As shown in fig. 3 and 6, a step-shaped ejector rod 2 with a large outer part and a small inner part is arranged in the ejector rod hole, the outer end of the ejector rod is a piston section matched with the inner wall of the ejector rod hole, the piston section is positioned between a pressurizing air path 14 and a loosening air path 15, the ejector rod hole is a step hole with a large outer part and a small inner part, and the inner end of the ejector rod 2 is matched with the small inner end of the ejector rod hole. The inner end of the ejector rod is a ball head, and the inner end of the ejector rod extends to the middle hole to abut against the zero point pin 11. The outer end of the ejector rod hole is provided with an internal thread and a threaded plug 4 in a screwed mode, and a compression spring 3 is arranged between the threaded plug 4 and the outer end of the ejector rod.
And a top rod outer sealing ring 8 is arranged on the periphery of the piston section of the top rod 2, and a top rod inner sealing ring 7 is arranged on the periphery of the inner end of the top rod. And a threaded plug outer sealing ring 9 is arranged between the outer end of the threaded plug 4 and the wall of the ejector rod hole.
As shown in fig. 6, a plurality of through holes are formed between two end faces of the upper cover 1, the number of the through holes is consistent with that of the ejector rod holes, the through holes are alternately and uniformly arranged, the through holes are arranged around the middle shaft and close to the outer ring of the upper cover, and bolts for installing the upper cover are arranged in the through holes. The through hole is a counter bore, and the bolt is a hexagon socket head cap screw 10.
Claims (10)
1. The utility model provides a push directly locking formula zero point positioning mechanism, includes the upper cover of disc type, and the axis department of upper cover is provided with the mesopore that supplies the zero point round pin to insert the location, its characterized in that: the upper cover ring is provided with a plurality of ejector rod holes which are communicated with the middle hole and the outer wall of the upper cover ring, the upper cover is sequentially provided with an annular pressurizing air channel and an annular loosening air channel from outside to inside by taking the middle shaft as an axis, the pressurizing air channel and the loosening air channel are respectively communicated with the ejector rod holes, a step-shaped ejector rod with a large outer part and a small inner part is arranged in each ejector rod hole, the outer end of each ejector rod is a piston section matched with the inner wall of the corresponding ejector rod hole, the piston section is located between the pressurizing air channel and the loosening air channel, and the inner end of each ejector rod extends out to the middle hole to abut against the zero pin.
2. The direct-push locking type zero-point positioning mechanism of claim 1, wherein: and the periphery of the piston section of the ejector rod is provided with an ejector rod outer sealing ring, and the periphery of the inner end of the ejector rod is provided with an ejector rod inner sealing ring.
3. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: the outer end of the ejector rod hole is provided with an internal thread and a threaded plug in a screwed mode, and a compression spring is arranged between the threaded plug and the outer end of the ejector rod.
4. The direct-push locking type zero-point positioning mechanism of claim 3, wherein: and a threaded plug outer sealing ring is arranged between the outer end of the threaded plug and the wall of the ejector rod hole.
5. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: the ejector rod hole is a stepped hole with a large outer part and a small inner part, and the inner end of the ejector rod is matched with the small inner end hole of the ejector rod hole.
6. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: the inner end of the ejector rod is a ball head.
7. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: the bottom surface of the upper cover is buckled with an annular outer gas path welding cover plate for sealing the bottom surface of the pressurizing gas path and an annular inner gas path welding cover plate for sealing and loosening the bottom surface of the gas path.
8. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: the side wall of the upper cover is provided with a pressurization external air source interface communicated with the pressurization air path and a loosening external air source interface communicated with the loosening air path.
9. The direct-push locking type zero-point positioning mechanism according to claim 1 or 2, wherein: a plurality of through holes are formed between two end faces of the upper cover, the number of the through holes is consistent with that of the ejector rod holes, the through holes are alternately and uniformly arranged, the through holes are arranged around the middle shaft and close to the outer ring of the upper cover, and bolts used for installing the upper cover are arranged in the through holes.
10. The direct-push locking type zero-point positioning mechanism of claim 9, wherein: the through hole is a counter bore, and the bolt is a hexagon socket head cap screw.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122000379.4U CN215788427U (en) | 2021-08-24 | 2021-08-24 | Direct-push locking type zero point positioning mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122000379.4U CN215788427U (en) | 2021-08-24 | 2021-08-24 | Direct-push locking type zero point positioning mechanism |
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CN215788427U true CN215788427U (en) | 2022-02-11 |
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CN202122000379.4U Active CN215788427U (en) | 2021-08-24 | 2021-08-24 | Direct-push locking type zero point positioning mechanism |
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CN (1) | CN215788427U (en) |
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2021
- 2021-08-24 CN CN202122000379.4U patent/CN215788427U/en active Active
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