CN109079167B - Self-centering centre - Google Patents
Self-centering centre Download PDFInfo
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- CN109079167B CN109079167B CN201811017431.3A CN201811017431A CN109079167B CN 109079167 B CN109079167 B CN 109079167B CN 201811017431 A CN201811017431 A CN 201811017431A CN 109079167 B CN109079167 B CN 109079167B
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- rack
- movable sleeve
- bearing
- self
- positioning sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B23/00—Tailstocks; Centres
- B23B23/02—Dead centres
- B23B23/025—Dead centres the centres being adjustable
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention relates to a self-centering center, which comprises a mandril shaft, wherein the left side of the mandril shaft is provided with a mandril head, the outer surface of the mandril head is uniformly provided with a second rack and a second chute, the outer side of the mandril head is provided with a movable sleeve, the inner part of the movable sleeve is provided with a gear, the movable sleeve is fixedly provided with a first cylindrical pin and a second cylindrical pin, the outer side of the movable sleeve is provided with a positioning sleeve, the inner side of the positioning sleeve is uniformly provided with a first rack and a first chute, the left side of the positioning sleeve is provided with a shaft part, the left side of the positioning sleeve is provided with an inclined plane, the middle part of the mandril head is provided with a groove, a compression spring is arranged in the groove, one end of the compression spring is connected with the movable sleeve, the other end of the compression spring is connected with the bottom of the, A third bearing; the invention has the advantages of reasonable structure, convenient use, high clamping and aligning speed and high working efficiency.
Description
Technical Field
The invention belongs to the technical field of machining tools, and particularly relates to a self-centering center.
Background
In the turning operation of a machine tool, shaft parts are very common, when the shaft parts are machined, one end of each shaft part is fixed on a chuck of the machine tool, and then the other end of each shaft part is propped against by using a tip at the tail of the machine tool after alignment is carried out, so that the process usually consumes more time, and the machining efficiency of the shaft parts is low; therefore, it is very necessary to provide a self-centering center which is reasonable in structure, convenient to use, high in clamping and aligning speed and high in working efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a self-centering center which is reasonable in structure, convenient to use, high in clamping and aligning speed and high in working efficiency.
The purpose of the invention is realized as follows: the self-centering center comprises a mandril shaft, wherein a mandril head is arranged on the left side of the mandril shaft, a second rack and a second sliding groove are uniformly arranged on the outer surface of the mandril head, a movable sleeve is arranged on the outer side of the mandril head, a gear is arranged in the movable sleeve, a first cylindrical pin and a second cylindrical pin are fixedly arranged on the movable sleeve, a positioning sleeve is arranged on the outer side of the movable sleeve, a first rack and a first sliding groove are uniformly arranged on the inner side of the positioning sleeve, a shaft part is arranged on the left side of the positioning sleeve, an inclined plane is arranged on the left side of the positioning sleeve, a groove is arranged in the middle of the mandril head, a compression spring is arranged in the groove, one end of the compression spring is connected with the movable sleeve, the other end of the compression spring is connected with the bottom of the groove, and a cylinder is arranged on the right side, the right side of cylinder be provided with the cone, the inside of cylinder from left to right set gradually first bearing, spacer, second bearing, third bearing, the left side of cylinder be provided with the end cover, the middle part of cone be provided with the circular port.
The first cylindrical pin is embedded into the first sliding groove and can horizontally move relative to the first sliding groove; the second cylindrical pins are embedded into the second sliding grooves and can horizontally move relative to the second sliding grooves, the number of the first cylindrical pins is three, the number of the second cylindrical pins is three, the number of the first sliding grooves is three, and the number of the second sliding grooves is three.
The first rack and the second rack are both straight racks, the gears are straight gears, and the number of the first rack, the second rack and the gears is three.
The inclined plane and the horizontal line form an included angle of 45 degrees.
The first bearing, the second bearing and the third bearing are all deep groove ball bearings.
The spacer bush is a ring body spacer bush.
The invention has the beneficial effects that: when the lathe tailstock is used, the lathe tailstock is arranged on a lathe tailstock, then a shaft part to be processed is arranged on a lathe chuck, the lathe tailstock is pushed forwards, so that the positioning sleeve centers on the shaft part, the ejector rod head and the ejector rod shaft continue to be pushed, the relative motion of the gear, the first rack and the second rack drives the positioning sleeve and the movable sleeve to move, the positioning sleeve moves backwards relative to the movable sleeve, and after the movable sleeve contacts the shaft part, the ejector rod shaft continues to be pushed till the movable sleeve is tightly pushed, so that the shaft part is tightly pushed; in the machining process, the movable sleeve, the positioning sleeve, the ejector rod shaft and the ejector rod head rotate together with the parts; the invention has the advantages of reasonable structure, convenient use, high clamping and aligning speed and high working efficiency.
Drawings
Fig. 1 is an elevation view of the self-centering point of the present invention in a relaxed state.
Fig. 2 is a front view of the self-centering point of the present invention in a tightened state.
Fig. 3 is a left side view of the self-centering point of the present invention.
In the figure: 1. the shaft type part comprises a shaft type part 2, a positioning sleeve 3, a first rack 4, a gear 5, a second rack 6, a movable sleeve 7, a compression spring 8, a groove 9, a ejector rod head 10, an ejector rod shaft 11, an end cover 12, a first bearing 13, a second bearing 14, a third bearing 15, a cone 16, a spacer bush 17, a cylinder 18, a circular hole 19, a first sliding groove 20, a first cylindrical pin 21, a second cylindrical pin 22, a second sliding groove 23 and an inclined plane.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-3, the self-centering center comprises a jack shaft 10, a jack head 9 is arranged on the left side of the jack shaft 10, a second rack 5 and a second chute 22 are uniformly arranged on the outer surface of the jack head 9, a movable sleeve 6 is arranged on the outer side of the jack head 9, a gear 4 is arranged inside the movable sleeve 6, a first cylindrical pin 20 and a second cylindrical pin 21 are fixedly arranged on the movable sleeve 6, a positioning sleeve 2 is arranged on the outer side of the movable sleeve 6, a first rack 3 and a first chute 19 are uniformly arranged on the inner side of the positioning sleeve 2, a shaft part 1 is arranged on the left side of the positioning sleeve 6, an inclined surface 23 is arranged on the left side of the positioning sleeve 2, a groove 8 is arranged in the middle of the jack head 9, a compression spring 7 is arranged in the groove 8, and one end of the compression spring 7 is connected with the movable sleeve 6, the other end of the compression spring 7 is connected with the bottom of the groove 8, a cylinder 17 is arranged on the right side of the mandril shaft 10, a cone 15 is arranged on the right side of the cylinder 17, a first bearing 12, a spacer 16, a second bearing 13 and a third bearing 14 are sequentially arranged in the cylinder 17 from left to right, an end cover 11 is arranged on the left side of the cylinder 17, and a circular hole 18 is formed in the middle of the cone 15.
When the processing device is used, the processing device is arranged on a tailstock of a machine tool, then a shaft part 1 to be processed is arranged on a chuck of the machine tool, then the tailstock of the machine tool is pushed forwards, so that a positioning sleeve 2 is centered on the shaft part 1, then a push rod head 9 and a push rod shaft 10 are continuously pushed, relative motion of a gear 4, a first rack 3 and a second rack 5 drives the positioning sleeve 2 and a movable sleeve 6 to move, the positioning sleeve 2 moves backwards relative to the movable sleeve 6, after the movable sleeve 6 is contacted with the shaft part 1, the push rod shaft 10 is continuously pushed till the movable sleeve 6 is tightly pushed, and therefore the shaft part 1 is tightly pushed; in the processing process, the movable sleeve 6, the positioning sleeve 2, the ejector rod shaft 10 and the ejector rod head 9 rotate together with the parts; the invention has the advantages of reasonable structure, convenient use, high clamping and aligning speed and high working efficiency.
Example 2
As shown in fig. 1-3, the self-centering center comprises a jack shaft 10, a jack head 9 is arranged on the left side of the jack shaft 10, a second rack 5 and a second chute 22 are uniformly arranged on the outer surface of the jack head 9, a movable sleeve 6 is arranged on the outer side of the jack head 9, a gear 4 is arranged inside the movable sleeve 6, a first cylindrical pin 20 and a second cylindrical pin 21 are fixedly arranged on the movable sleeve 6, a positioning sleeve 2 is arranged on the outer side of the movable sleeve 6, a first rack 3 and a first chute 19 are uniformly arranged on the inner side of the positioning sleeve 2, a shaft part 1 is arranged on the left side of the positioning sleeve 6, an inclined surface 23 is arranged on the left side of the positioning sleeve 2, a groove 8 is arranged in the middle of the jack head 9, a compression spring 7 is arranged in the groove 8, and one end of the compression spring 7 is connected with the movable sleeve 6, the other end of the compression spring 7 is connected with the bottom of the groove 8, a cylinder 17 is arranged on the right side of the mandril shaft 10, a cone 15 is arranged on the right side of the cylinder 17, a first bearing 12, a spacer 16, a second bearing 13 and a third bearing 14 are sequentially arranged in the cylinder 17 from left to right, an end cover 11 is arranged on the left side of the cylinder 17, and a circular hole 18 is formed in the middle of the cone 15.
For better effect, the first cylindrical pin 20 is embedded in the first sliding slot 19 and can move horizontally relative to the first sliding slot 19; the second cylindrical pins 21 are embedded in the second slide grooves 22 and can move horizontally relative to the second slide grooves 22, the number of the first cylindrical pins 20 is three, the number of the second cylindrical pins 21 is three, the number of the first slide grooves 19 is three, and the number of the second slide grooves 22 is three.
For better effect, first rack 3 and second rack 5 be the straight-tooth rack, gear 4 be the straight-tooth gear, first rack 3, second rack 5, gear 4 the quantity all be three, in actual assembly, the middle part of gear 4 is fixed inside movable sleeve 6 through the pivot, can do relative rotation for movable sleeve 6.
For better effect, the inclined surface 23 and the horizontal line form an included angle of 45 degrees, and the inclined surface 23 forms a conical surface in the positioning sleeve 2, so that the shaft parts can be conveniently aligned and positioned.
For better effect, the first bearing 12, the second bearing 13 and the third bearing 14 are all deep groove ball bearings.
For better effect, the spacer 16 is a ring spacer.
When the processing device is used, the processing device is arranged on a tailstock of a machine tool, then a shaft part 1 to be processed is arranged on a chuck of the machine tool, then the tailstock of the machine tool is pushed forwards, so that a positioning sleeve 2 is centered on the shaft part 1, then a push rod head 9 and a push rod shaft 10 are continuously pushed, relative motion of a gear 4, a first rack 3 and a second rack 5 drives the positioning sleeve 2 and a movable sleeve 6 to move, the positioning sleeve 2 moves backwards relative to the movable sleeve 6, after the movable sleeve 6 is contacted with the shaft part 1, the push rod shaft 10 is continuously pushed till the movable sleeve 6 is tightly pushed, and therefore the shaft part 1 is tightly pushed; in the processing process, the movable sleeve 6, the positioning sleeve 2, the ejector rod shaft 10 and the ejector rod head 9 rotate together with the parts; the shaft part 1 is better in clamping effect by adopting the compression spring 7, and lubricating oil is respectively coated on the first rack, the second rack, the gear, the first cylindrical pin and the second cylindrical pin in the using process of the shaft part, so that the shaft part is convenient to move; the invention has the advantages of reasonable structure, convenient use, high clamping and aligning speed and high working efficiency.
Claims (6)
1. From centering top, it includes the jackrod axle, its characterized in that: the left side of the ejector rod shaft is provided with an ejector rod head, the outer surface of the ejector rod head is uniformly provided with a second rack and a second sliding groove, the outer side of the ejector rod head is provided with a movable sleeve, a gear is arranged in the movable sleeve, a first cylindrical pin and a second cylindrical pin are fixedly arranged on the movable sleeve, the outer side of the movable sleeve is provided with a positioning sleeve, the inner side of the positioning sleeve is uniformly provided with a first rack and a first sliding groove, the left side of the positioning sleeve is provided with a shaft part, the left side of the positioning sleeve is provided with an inclined plane, the middle part of the ejector rod head is provided with a groove, a compression spring is arranged in the groove, one end of the compression spring is connected with the movable sleeve, the other end of the compression spring is connected with the bottom of the groove, the right side of the ejector rod shaft is provided with a cylinder, and the right side of, the cylinder is internally provided with a first bearing, a spacer bush, a second bearing and a third bearing in sequence from left to right, the left side of the cylinder is provided with an end cover, the middle part of the cone is provided with a circular hole, and the first cylindrical pin is embedded into the first sliding groove and can horizontally move relative to the first sliding groove; the second cylindrical pin is embedded into the second sliding groove and can horizontally move relative to the second sliding groove.
2. The self-centering point of claim 1, wherein: the number of the first cylindrical pins is three, the number of the second cylindrical pins is three, the number of the first sliding grooves is three, and the number of the second sliding grooves is three.
3. The self-centering point of claim 1, wherein: the first rack and the second rack are both straight racks, the gears are straight gears, and the number of the first rack, the second rack and the gears is three.
4. The self-centering point of claim 1, wherein: the inclined plane and the horizontal line form an included angle of 45 degrees.
5. The self-centering point of claim 1, wherein: the first bearing, the second bearing and the third bearing are all deep groove ball bearings.
6. The self-centering point of claim 1, wherein: the spacer bush is a ring body spacer bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017431.3A CN109079167B (en) | 2018-09-03 | 2018-09-03 | Self-centering centre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017431.3A CN109079167B (en) | 2018-09-03 | 2018-09-03 | Self-centering centre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109079167A CN109079167A (en) | 2018-12-25 |
| CN109079167B true CN109079167B (en) | 2020-02-21 |
Family
ID=64840467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811017431.3A Active CN109079167B (en) | 2018-09-03 | 2018-09-03 | Self-centering centre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109079167B (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4370907A (en) * | 1980-11-05 | 1983-02-01 | Felice Leo C | Positive stop center |
| US6374713B1 (en) * | 2000-04-10 | 2002-04-23 | Kevin J. Bissett | Facedriver with fully-adaptable workpiece engagement and enhanced centerpoint force |
| CN2834747Y (en) * | 2005-12-03 | 2006-11-08 | 天水星火机床有限责任公司 | A hydraulic clamping device |
| CN201287586Y (en) * | 2008-10-23 | 2009-08-12 | 喻国锋 | Thimble apparatus |
| CN204366068U (en) * | 2014-12-12 | 2015-06-03 | 四川工程职业技术学院 | Floating type end-driver center |
| CN205129484U (en) * | 2015-11-27 | 2016-04-06 | 陕西北方动力有限责任公司 | Axial positioning centring means that floats |
| CN205393689U (en) * | 2016-02-27 | 2016-07-27 | 西安贝吉姆机床股份有限公司 | From centering spring clamping device |
| CN107538089A (en) * | 2017-08-28 | 2018-01-05 | 华星传动科技无锡有限公司 | Axle tooth processing self-locking clamp |
-
2018
- 2018-09-03 CN CN201811017431.3A patent/CN109079167B/en active Active
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| Publication number | Publication date |
|---|---|
| CN109079167A (en) | 2018-12-25 |
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