CN203635946U - Movable ejector pin for lathe tailstock - Google Patents
Movable ejector pin for lathe tailstock Download PDFInfo
- Publication number
- CN203635946U CN203635946U CN201320725194.2U CN201320725194U CN203635946U CN 203635946 U CN203635946 U CN 203635946U CN 201320725194 U CN201320725194 U CN 201320725194U CN 203635946 U CN203635946 U CN 203635946U
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- Prior art keywords
- outer end
- angular contact
- bearing
- thimble
- urceolus
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- Expired - Lifetime
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- 238000012856 packing Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a movable ejector pin for a lathe tailstock, which comprises an ejector pin body, an ejector pin sleeve, an ejector pin outer cylinder and a bearing set, wherein the bearing mounting shaft neck of the ejector pin sleeve comprises an outer end shaft neck and an inner end shaft neck; the outer end shaft neck is larger than the inner end shaft neck; a shaft shoulder is formed at the exterior of the outer end shaft neck; the bearing set comprises an outer end bearing set and an inner end bearing set; the outer end bearing set comprises three first angular contact bearings; the inner end bearing set comprises two second angular contact bearings; the bearing large ends of the first angular contact bearings on the outer end face outwards; an inner bushing is arranged between the inner end bearing set and the outer end bearing set; the ejector pin outer cylinder comprises an outer cylinder body; the external diameter at the tail section at the rear end of the outer cylinder body is in clearance fit with the inner hole of the lathe tailstock; a step surface supporting the inner rings of the second angular contact bearings is formed in the inner hole of the outer cylinder body; the outer cylinder body is in axial fixed connection with the ejector pin sleeve through a threaded pull rod. The movable ejector pin has the benefits that the structural strength and rigidity are high; the service life is long; the maintenance is convenient; the use cost is low.
Description
Technical field
The utility model relates to a kind of thimble, particularly a kind of tail stock live centre.
Background technology
Tail stock generally comprises thimble urceolus with live centre, thimble urceolus afterbody has the Morse taper shank coordinating with tail stock sleeve mohs tapered bore, in thimble urceolus, be combined with thimble inner core by the bearing group of at least two bearing compositions, thimble inner core is combined with thimble body by Morse's taper, and it is top that thimble body front end has the tapering of ejecting workpiece.Existing movable thimble is installed in barrel of tail stock by the Morse taper shank of thimble urceolus afterbody, and when use, thimble moves with barrel of tail stock, reaches the object of ejecting workpiece, adds man-hour workpiece is carried out to turning, and thimble body rotates in company with workpiece.Due to the restriction of tail stock tube-in-tube structure size, existing movable thimble physical dimension is less; In addition, the bearing of existing thimble adopts radial ball bearing conventionally, and bearing specification is less, and thimble inner core two ends adopt the bearing arrangement mode of same size bearing.Therefore, there is the deficiencies such as intensity is low, poor rigidity in existing movable thimble, and the powerful turning of large specification part that is unsuitable for full depth amount is used.For this reason, need to improve.
Summary of the invention
The purpose of this utility model is exactly for the deficiencies in the prior art, provides that a kind of structural strength is high, the tail stock live centre of good rigidly.
For achieving the above object, the utility model adopts following technical scheme.
A kind of tail stock live centre, comprise thimble body, thimble sleeve, thimble urceolus and bearing group, the bearing of described thimble sleeve is installed axle journal and is formed by forming step-like outer end-journal and interior end-journal, and outer end-journal is greater than interior end-journal, and outer end-journal outside is formed with the shaft shoulder; Described bearing group is made up of inner bearing group and outer end bearing group, and outer end bearing group is made up of three the first angular contact bearings, and the large end of bearing of the first angular contact bearing that is positioned at outer end is outside; Inner bearing group is made up of two second angular contact bearings; Between inner bearing group and outer end bearing group, be provided with neck bush, neck bush is connected between first angular contact bearing and second angular contact bearing in outside of inner side; Described thimble urceolus comprises urceolus body, the rear end tails section of urceolus body has the external diameter that becomes matched in clearance with tail stock endoporus, urceolus body end segment is provided with the circumferential stopper slot that runs through urceolus body tail end, on urceolus body tail end face, be evenly equipped with 3～6 screws, urceolus body endoporus is formed with the step surface that supports described the second angular contact bearing inner ring, and urceolus body forms axial restraint by thread and described tailstock barrel cylinder and is connected.
Adopt the utility model of aforementioned techniques scheme, the suffered axial force of thimble body is successively by the thimble sleeve outer end shaft shoulder, three the first angular contact bearing inner rings, neck bush, the step surface forming on the urceolus body endoporus of two second angular contact bearings and thimble urceolus is delivered on urceolus body, particularly the bearing that adopts is angular contact bearing, and outer end is provided with three the first large angular contact bearings, break the angular contact bearing traditional approach of configuration in pairs, be positioned at the large end of outside the first angular contact bearing outside simultaneously, greatly improve the axial carrying capacity of thimble, live centre directly coordinates installation with the endoporus of the former mounted tailstock sleeve of tailstock by urceolus body, cancel barrel of tail stock, thimble structure size can effectively increase, therefore the mode that can increase by physical dimension improves thimble strength and stiffness, on urceolus body by being evenly equipped with 3～6 screws on tail end face, can be connected with hydraulic cylinder as power section or the piston rod of cylinder by these 3～6 screw urceolus bodies, also can utilize hydraulic pressure or Pneumatic pressure power to promote thimble ejecting workpiece or move with respect to tailstock or.
Preferably, described thimble urceolus also comprises spreading ring set, and spreading ring set is fixedly connected on described urceolus body front end by the first screw, and spreading ring set endoporus is used to form the installing hole of three the first large angular contact bearings of described outer end bearing group.Thimble outer cylindrical becomes combining structure, is convenient to dismounting and maintaining.
Further preferred, described spreading ring set outer end is also fixedly connected with transparent cover by the second screw, between transparent cover and the outer end external cylindrical surface of thimble sleeve, is connected with outside framework oil seal.Contaminated to prevent bearing oil fat, guarantee thimble long service life.
Preferably, described inner bearing group is also connected with packing ring between the second angular contact bearing inner ring of inner end and the step surface of described urceolus body, a part for packing ring is positioned at the inner side, inner end of described thimble sleeve, and the diameter of bore of packing ring is less than the inner end diameter of thimble sleeve.Increase the contact area of the step surface of the second angular contact bearing inner ring and urceolus body by packing ring, further increase the structural rigidity of thimble; Meanwhile, also, in thimble sleeve when dismounting maintenance, thimble sleeve inner face is formed to protection, to extend thimble service life.
Preferably, described thimble body is also provided with dismounting thread segment.To change the top part of thimble body or reconditioning thimble body, can reduce use cost.
The beneficial effects of the utility model are, structural strength is high, good rigidly, and long service life, maintaining is convenient, use cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model front side.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described, but therefore the utility model is not limited among described scope of embodiments.
Referring to Fig. 1, a kind of tail stock live centre, comprise thimble body 1, thimble sleeve 2, thimble urceolus 3 and bearing group, the bearing of described thimble sleeve 2 is installed axle journal and is formed by forming step-like outer end-journal 21 and interior end-journal 22, outer end-journal 21 is greater than interior end-journal 22, and outer end-journal 21 outsides are formed with the shaft shoulder 23; Described bearing group is made up of inner bearing group and outer end bearing group, and outer end bearing group is made up of three the first angular contact bearings 4, and the large end of bearing of the first angular contact bearing 4 that is positioned at outer end is outside; Inner bearing group is made up of 5 of two second angular contact bearings; Between inner bearing group and outer end bearing group, be provided with neck bush 6, neck bush 6 is connected between first angular contact bearing 4 and second angular contact bearing 5 in outside of inner side; Described thimble urceolus 3 comprises urceolus body 31 and spreading ring set 32, the rear end tails section of urceolus body 31 has the external diameter that becomes matched in clearance with tail stock endoporus, urceolus body 31 end segment are provided with the circumferential stopper slot 31a that runs through urceolus body 31 tail ends, on urceolus body 31 tail end faces, be evenly equipped with 3～6 screw 31b, urceolus body 31 endoporus are formed with the step surface 31c that supports described the second angular contact bearing 5 inner rings, and urceolus body 31 forms axial restraint by thread 102 with described thimble sleeve 2 and is connected.Described inner bearing group is also connected with packing ring 101 between the second angular contact bearing 5 inner rings of inner end and the step surface 31c of described urceolus body 31, a part for packing ring 101 is positioned at the inner side, inner end of described thimble sleeve 2, and the diameter of bore of packing ring 101 is less than the inner end diameter of thimble sleeve 2.Described spreading ring set 32 is fixedly connected on described urceolus body 31 front ends by the first screw 7, and spreading ring set 32 endoporus are used to form the installing hole of three the first large angular contact bearings 4 of described outer end bearing group.Described spreading ring set 32 outer ends are also fixedly connected with transparent cover 9 by the second screw 8, between transparent cover 9 and the outer end external cylindrical surface of thimble sleeve 2, are connected with outside framework oil seal 10.Described thimble body 1 is also provided with dismounting thread segment 1a.
Although combine above accompanying drawing, embodiment of the present utility model is described, but those of ordinary skill in the art also can recognize making various variations or modification in the scope of claims, these modifications and variations are interpreted as within scope of the present utility model and intention.
Claims (5)
1. a tail stock live centre, comprise thimble body (1), thimble sleeve (2), thimble urceolus (3) and bearing group, it is characterized in that, the bearing of described thimble sleeve (2) is installed axle journal and is formed by forming step-like outer end-journal (21) and interior end-journal (22), outer end-journal (21) is greater than interior end-journal (22), and outer end-journal (21) outside is formed with the shaft shoulder (23), described bearing group is made up of inner bearing group and outer end bearing group, and outer end bearing group is made up of three the first angular contact bearings (4), and the large end of bearing of the first angular contact bearing (4) that is positioned at outer end is outside, inner bearing group is by two second angular contact bearing (5) individual compositions, between inner bearing group and outer end bearing group, be provided with neck bush (6), neck bush (6) is connected between first angular contact bearing (4) and second angular contact bearing (5) in outside of inner side, described thimble urceolus (3) comprises urceolus body (31), the rear end tails section of urceolus body (31) has the external diameter that becomes matched in clearance with tail stock endoporus, urceolus body (31) end segment is provided with the circumferential stopper slot (31a) that runs through urceolus body (31) tail end, on urceolus body (31) tail end face, be evenly equipped with 3～6 screws (31b), urceolus body (31) endoporus is formed with the step surface (31c) that supports described the second angular contact bearing (5) inner ring, urceolus body (31) forms axial restraint by thread (102) and described thimble sleeve (2) and is connected.
2. tail stock live centre according to claim 1, it is characterized in that, described thimble urceolus (3) also comprises spreading ring set (32), spreading ring set (32) is fixedly connected on described urceolus body (31) front end by the first screw (7), and spreading ring set (32) endoporus is used to form the installing hole of three large the first angular contact bearings (4) of described outer end bearing group.
3. tail stock live centre according to claim 2, it is characterized in that, described spreading ring set (32) outer end is also fixedly connected with transparent cover (9) by the second screw (8), between transparent cover (9) and the outer end external cylindrical surface of thimble sleeve (2), is connected with outside framework oil seal (10).
4. according to the tail stock live centre described in any one claim in claim 1～3, it is characterized in that, described inner bearing group is positioned between the second angular contact bearing (5) inner ring of inner end and the step surface (31c) of described urceolus body (31) and is also connected with packing ring (101), a part for packing ring (101) is positioned at the inner side, inner end of described thimble sleeve (2), and the diameter of bore of packing ring (101) is less than the inner end diameter of thimble sleeve (2).
5. according to the tail stock live centre described in any one claim in claim 1～3, it is characterized in that, described thimble body (1) is also provided with dismounting thread segment (1a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725194.2U CN203635946U (en) | 2013-11-15 | 2013-11-15 | Movable ejector pin for lathe tailstock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320725194.2U CN203635946U (en) | 2013-11-15 | 2013-11-15 | Movable ejector pin for lathe tailstock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203635946U true CN203635946U (en) | 2014-06-11 |
Family
ID=50867226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320725194.2U Expired - Lifetime CN203635946U (en) | 2013-11-15 | 2013-11-15 | Movable ejector pin for lathe tailstock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203635946U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108537A (en) * | 2015-09-14 | 2015-12-02 | 苏州东方模具科技股份有限公司 | Glass mold carrying device for tool clamp |
| CN105328212A (en) * | 2015-11-23 | 2016-02-17 | 重庆欧博特智能机器人科技有限公司 | Machine tool tailstock |
| CN106392105A (en) * | 2016-12-12 | 2017-02-15 | 重庆宏钢数控机床有限公司 | Taper fast adjusting type center structure |
| TWI593485B (en) * | 2015-09-23 | 2017-08-01 | Zhi-Long Zhou | Thimble device |
| CN107442790A (en) * | 2017-08-08 | 2017-12-08 | 庄亮 | The collapsible tailstock of digital control processing |
| CN110039074A (en) * | 2019-05-23 | 2019-07-23 | 浙江杰克机床股份有限公司 | Thimble is stirred in one kind |
| CN112317783A (en) * | 2020-11-11 | 2021-02-05 | 安徽同华新能源动力股份有限公司 | Centre mounting seat |
-
2013
- 2013-11-15 CN CN201320725194.2U patent/CN203635946U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108537A (en) * | 2015-09-14 | 2015-12-02 | 苏州东方模具科技股份有限公司 | Glass mold carrying device for tool clamp |
| TWI593485B (en) * | 2015-09-23 | 2017-08-01 | Zhi-Long Zhou | Thimble device |
| CN105328212A (en) * | 2015-11-23 | 2016-02-17 | 重庆欧博特智能机器人科技有限公司 | Machine tool tailstock |
| CN105328212B (en) * | 2015-11-23 | 2018-02-09 | 重庆欧博特智能机器人科技有限公司 | A kind of tailstock tool |
| CN106392105A (en) * | 2016-12-12 | 2017-02-15 | 重庆宏钢数控机床有限公司 | Taper fast adjusting type center structure |
| CN107442790A (en) * | 2017-08-08 | 2017-12-08 | 庄亮 | The collapsible tailstock of digital control processing |
| CN110039074A (en) * | 2019-05-23 | 2019-07-23 | 浙江杰克机床股份有限公司 | Thimble is stirred in one kind |
| CN112317783A (en) * | 2020-11-11 | 2021-02-05 | 安徽同华新能源动力股份有限公司 | Centre mounting seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |