CN105479237A - Lead screw prestretching structure - Google Patents
Lead screw prestretching structure Download PDFInfo
- Publication number
- CN105479237A CN105479237A CN201610029319.6A CN201610029319A CN105479237A CN 105479237 A CN105479237 A CN 105479237A CN 201610029319 A CN201610029319 A CN 201610029319A CN 105479237 A CN105479237 A CN 105479237A
- Authority
- CN
- China
- Prior art keywords
- bearing
- screw mandrel
- lead screw
- support assembly
- rear support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
- B23Q5/404—Screw bearings therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention provides a lead screw prestretching structure which comprises a motor, a motor base, a coupler, a lead screw, a lead screw front support assembly and a lead screw rear support assembly. The lead screw is horizontally arranged between the lead screw front support assembly and the lead screw rear support assembly. The motor is horizontally arranged on the motor base. A motor output shaft is connected with a lead screw shaft through the coupler. The lead screw rear support assembly comprises an adjusting gasket, a bearing pedestal, a spacer bush, a bearing front end cover, a lock nut, a bearing, a middle inner spacer bush, a middle outer spacer bush and a bearing rear end cover. The structure is simple, mounting and adjusting are convenient, the maintaining frequency is small, the influence caused by temperature rise extension of the lead screw on precision can be eliminated by means of the prestretching function of the structure, and therefore the precision and reliability of the lead screw are improved, and the rigidity and heat stability of the lead screw are guaranteed.
Description
technical field:
The present invention relates to Digit Control Machine Tool parts and drive field, particularly relate to a kind of screw mandrel prestretched structure.
background technology:
In recent years, manufacturing development is had higher requirement to Digit Control Machine Tool performance, and screw rod transmission precision has important impact to amount of feeding during machine tooling, positioning precision.Because of frictional heat in transmission process, screw mandrel produces elongation phenomenon in the axial direction, causes machine tool drive and positioning precision to reduce.For improving rigidity and the heat endurance of screw mandrel, usually prestretched process is carried out to screw mandrel, existing screw mandrel prestressing mechanism many employings screw mandrel bearing one end is fixed, the other end adopts locking nut locking, make screw mandrel be in pretensioned state, this structure needs to leave certain gap between the shaft shoulder of screw mandrel and the inner ring of bearing, and bearing enclose unbalance stress, easily make bearing wear, reduce screw mandrel rigidity; Part is had to adopt double nut locking, namely after screw mandrel bearing one end fixes, outside bearing block, adopt a locking nut to be strained by screw mandrel, re-use another nut fastening inside bearing block, although such structure can realize the pretension stretching action of screw mandrel, drive because screw mandrel comes and goes for a long time, easily cause nut loosening, thus reduction pretensioning effect, and during mounting and adjusting, need adjustment two nuts, not easy to operate.
summary of the invention:
In order to solve the problem, the invention provides a kind of new structure simple, install with easy to adjust, maintenance frequency is few, its prestretched effect can eliminate screw mandrel because of the impact of temperature rise elongation on precision, thus improve precision and the reliability of screw mandrel, ensure the rigidity of screw mandrel and the technical scheme of heat endurance:
A kind of screw mandrel prestretched structure, comprise mounting assembly, screw mandrel rear support assembly before motor, motor cabinet, shaft coupling, screw mandrel, screw mandrel, screw mandrel level to be installed on before screw mandrel between mounting assembly and screw mandrel rear support assembly, motor level is installed on motor cabinet, motor output shaft is connected by shaft coupling with screw axis, and before screw mandrel, mounting assembly, screw mandrel rear support assembly are coaxially arranged on screw axis.
As preferably, screw mandrel rear support assembly comprises adjusting pad, bearing block, spacer, bearing drive end bearing bracket, locking nut, bearing, middle inner spacing collar, middle outer separator, bearing rear end cap, adjusting pad is arranged between bearing block and bearing rear end cap, bearing is arranged on screw mandrel both sides, and two groups of bearings are arranged on middle inner spacing collar and middle outer separator both sides, bearing two ends are also provided with spacer.
As preferably, in screw mandrel rear support assembly, screw mandrel end is installed locking nut and is locked, and bearing both sides are provided with bearing drive end bearing bracket and bearing rear end cap, and fixedly mount with bearing block.
As preferably, adjusting pad is made up of two pieces of semicircle adjusting pads, and the semicircle adjusting pad of every block is equipped with four screw mounting holes
Beneficial effect of the present invention is:
(1) structure of the present invention is simple, spacer and bearing drive end bearing bracket is adopted to be fixed by bearing one end Internal and external cycle, the other end adopts bearing rear end cap to be fixed by bearing outer ring, bearing inner race adopts locking nut locking, reach pretension stretching action, make bearing enclose stress equalization, ensure bearing service life, and during adjustment, only need the locking nut adjusting side, simple and convenient; Pretension amount of tension is controlled by adjusting pad, makes screw mandrel amount of tension be able to quantified controlling, to adapt to the screw mandrel prestretched amount under different operating environment; Between bearing, spacer is housed, in order to adjust gap between bearing and precompressed.
(2) the present invention installs with easy to adjust, and maintenance frequency is few, and its prestretched effect can eliminate screw mandrel because of the impact of temperature rise elongation on precision, thus improves precision and the reliability of screw mandrel, ensures rigidity and the heat endurance of screw mandrel.
accompanying drawing illustrates:
Fig. 1 is overall structure figure of the present invention;
Fig. 2 is screw mandrel rear support assembly assumption diagram of the present invention;
Fig. 3 is adjusting pad structure chart of the present invention.
detailed description of the invention:
For making goal of the invention of the present invention, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiments of the present invention are described in further detail.
As shown in Figure 1-Figure 3, a kind of screw mandrel prestretched structure, comprise mounting assembly 4, screw mandrel rear support assembly 6 before motor 1, motor cabinet 2, shaft coupling 3, screw mandrel 5, screw mandrel, described screw mandrel 5 level to be installed on before described screw mandrel between mounting assembly 4 and described screw mandrel rear support assembly 6, described motor 1 level is installed on described motor cabinet 2, motor 1 output shaft is connected by described shaft coupling 3 with screw axis, and before described screw mandrel, mounting assembly 4, described screw mandrel rear support assembly 6 are coaxially arranged on screw axis.
In the present embodiment, screw mandrel rear support assembly 6 comprises adjusting pad 601, bearing block 602, spacer 604, bearing drive end bearing bracket 609, locking nut 606, bearing 607, middle inner spacing collar 608, middle outer separator 603, bearing rear end cap 605, described adjusting pad 601 is arranged between described bearing block 602 and described bearing rear end cap 605, and fixedly mounted by the mounting nuts on bearing drive end bearing bracket 609 and bearing block 602, prestretched amount need be used according to actual screw mandrel 5, select the adjusting pad 601 of different-thickness, the quantification realizing screw mandrel prestretched controls, described bearing 607 is arranged on described screw mandrel 5 both sides, and two groups of bearings are arranged on described middle inner spacing collar 608 and described middle outer separator 603 both sides, bearing 607 two ends are also provided with described spacer 604, in screw mandrel rear support assembly 6, screw mandrel 5 end installation locking nut 606 is locked, bearing 607 both sides are provided with described bearing drive end bearing bracket 609 and described bearing rear end cap 605, and fixedly mount with bearing block 602.
In addition, in the present embodiment, adjusting pad 601 is made up of two pieces of semicircle adjusting pads, and the semicircle adjusting pad of every block is equipped with four screw mounting holes, and it is solid and reliable; In actual use procedure, use the adjusting pad 601 of different-thickness, thus realize screw mandrel amount of tension fixing quantity.
Assembly method of the present invention is: be sleeved on screw mandrel 5 successively by bearing drive end bearing bracket 609, spacer 604, bearing 607, middle inner spacing collar 608, middle outer separator 603; The above-mentioned screw mandrel 5 installed is slided together and is inserted in bearing block 602, adjust the geometric accuracy of screw mandrel 5; Adjusting pad 601 is sleeved between bearing drive end bearing bracket 609 and bearing block 602, and with screw, bearing drive end bearing bracket 609 is fixed on bearing block 602 together with adjusting pad 601, and tighten; Spacer 604 is sleeved on screw mandrel 5, installs bearing rear end cap 605; Locking nut loaded screw mandrel and tightens, then tightening bearing rear end cap 605.
Beneficial effect of the present invention is: structure of the present invention is simple, spacer and bearing drive end bearing bracket is adopted to be fixed by bearing one end Internal and external cycle, the other end adopts bearing rear end cap to be fixed by bearing outer ring, bearing inner race adopts locking nut locking, reach pretension stretching action, make bearing enclose stress equalization, ensure bearing service life, and during adjustment, only need the locking nut adjusting side, simple and convenient; Pretension amount of tension is controlled by adjusting pad, makes screw mandrel amount of tension be able to quantified controlling, to adapt to the screw mandrel prestretched amount under different operating environment; Between bearing, spacer is housed, in order to adjust gap between bearing and precompressed; The present invention installs with easy to adjust, and maintenance frequency is few, and its prestretched effect can eliminate screw mandrel because of the impact of temperature rise elongation on precision, thus improves precision and the reliability of screw mandrel, ensures rigidity and the heat endurance of screw mandrel.
Above-described embodiment is preferred embodiment of the present invention; it is not the restriction to technical solution of the present invention; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of patent of the present invention.
Claims (4)
1. a screw mandrel prestretched structure, it is characterized in that: comprise motor (1), motor cabinet (2), shaft coupling (3), screw mandrel (5), mounting assembly (4) before screw mandrel, screw mandrel rear support assembly (6), described screw mandrel (5) level to be installed on before described screw mandrel between mounting assembly (4) and described screw mandrel rear support assembly (6), described motor (1) level is installed on described motor cabinet (2), motor (1) output shaft is connected by described shaft coupling (3) with screw axis, mounting assembly (4) before described screw mandrel, described screw mandrel rear support assembly (6) is coaxially arranged on screw axis.
2. one according to claim 1, it is characterized in that: described screw mandrel rear support assembly (6) comprises adjusting pad (601), bearing block (602), spacer (604), bearing drive end bearing bracket (609), locking nut (606), bearing (607), middle inner spacing collar (608), middle outer separator (603), bearing rear end cap (605), described adjusting pad (601) is arranged between described bearing block (602) and described bearing rear end cap (605), described bearing (607) is arranged on described screw mandrel (5) both sides, and two groups of bearings are arranged on described middle inner spacing collar (608) and described middle outer separator (603) both sides, bearing (607) two ends are also provided with described spacer (604).
3. a kind of screw mandrel prestretched structure according to claim 2, it is characterized in that: in described screw mandrel rear support assembly (6), screw mandrel (5) end installation locking nut (606) is locked, bearing (607) both sides are provided with described bearing drive end bearing bracket (609) and described bearing rear end cap (605), and fixedly mount with bearing block (602).
4. a kind of screw mandrel prestretched structure according to claim 2, is characterized in that: described adjusting pad (601) is made up of two pieces of semicircle adjusting pads, and the semicircle adjusting pad of every block is equipped with four screw mounting holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610029319.6A CN105479237A (en) | 2016-01-18 | 2016-01-18 | Lead screw prestretching structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610029319.6A CN105479237A (en) | 2016-01-18 | 2016-01-18 | Lead screw prestretching structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105479237A true CN105479237A (en) | 2016-04-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610029319.6A Pending CN105479237A (en) | 2016-01-18 | 2016-01-18 | Lead screw prestretching structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105479237A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105922049A (en) * | 2016-07-08 | 2016-09-07 | 江苏元利数控机床有限公司 | Ball screw prestretching mechanism and prestretching method thereof |
| CN106078176A (en) * | 2016-06-30 | 2016-11-09 | 广州市高品机床有限公司 | A kind of screw mandrel prestretched mounting structure |
| CN106312595A (en) * | 2016-11-02 | 2017-01-11 | 四川理工学院 | Lead screw supporting structure and precise pre-stretching method thereof |
| CN108581585A (en) * | 2018-07-28 | 2018-09-28 | 重庆宏钢数控机床有限公司 | Stretching device for leading screw pre-stretching |
| CN109048448A (en) * | 2018-09-10 | 2018-12-21 | 宁波海天精工股份有限公司 | A kind of lead screw support construction |
| CN113560933A (en) * | 2021-07-22 | 2021-10-29 | 上海诺倬力机电科技有限公司 | Screw rod stretching support structure and mounting method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118877A (en) * | 1996-10-22 | 1998-05-12 | Makino Milling Mach Co Ltd | Feed screw mechanism |
| KR20060022791A (en) * | 2004-09-08 | 2006-03-13 | 두산인프라코어 주식회사 | Ball screw pre-pressure device |
| CN201815913U (en) * | 2010-05-21 | 2011-05-04 | 宝鸡忠诚机床股份有限公司 | Feed system of numerically controlled lathe with quantitative pre-tightening function of lead screw |
| CN102139447A (en) * | 2011-03-23 | 2011-08-03 | 纽威数控装备（苏州）有限公司 | Fully-fixed screw rod prestretching mechanism |
| CN202877995U (en) * | 2012-09-14 | 2013-04-17 | 山东大学 | Double nut driven type ball screw assembly feeding mechanism |
| CN103072035A (en) * | 2013-01-24 | 2013-05-01 | 无锡市欧泰数控机床有限公司 | Pre-stretching locking mechanism for ball screw |
| CN205380496U (en) * | 2016-01-18 | 2016-07-13 | 南通国盛机电集团有限公司 | Lead screw pre -stretching structure |
-
2016
- 2016-01-18 CN CN201610029319.6A patent/CN105479237A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10118877A (en) * | 1996-10-22 | 1998-05-12 | Makino Milling Mach Co Ltd | Feed screw mechanism |
| KR20060022791A (en) * | 2004-09-08 | 2006-03-13 | 두산인프라코어 주식회사 | Ball screw pre-pressure device |
| CN201815913U (en) * | 2010-05-21 | 2011-05-04 | 宝鸡忠诚机床股份有限公司 | Feed system of numerically controlled lathe with quantitative pre-tightening function of lead screw |
| CN102139447A (en) * | 2011-03-23 | 2011-08-03 | 纽威数控装备（苏州）有限公司 | Fully-fixed screw rod prestretching mechanism |
| CN202877995U (en) * | 2012-09-14 | 2013-04-17 | 山东大学 | Double nut driven type ball screw assembly feeding mechanism |
| CN103072035A (en) * | 2013-01-24 | 2013-05-01 | 无锡市欧泰数控机床有限公司 | Pre-stretching locking mechanism for ball screw |
| CN205380496U (en) * | 2016-01-18 | 2016-07-13 | 南通国盛机电集团有限公司 | Lead screw pre -stretching structure |
Non-Patent Citations (2)
| Title |
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| 王健民: "《组合机床操作工 基础知识 中级技能》", 31 January 2001 * |
| 赵晶文: "《金属切削机床 第2版》", 30 June 2014 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106078176A (en) * | 2016-06-30 | 2016-11-09 | 广州市高品机床有限公司 | A kind of screw mandrel prestretched mounting structure |
| CN106078176B (en) * | 2016-06-30 | 2018-03-30 | 广州市高品机床有限公司 | A kind of screw mandrel is pre-stretched mounting structure |
| CN105922049A (en) * | 2016-07-08 | 2016-09-07 | 江苏元利数控机床有限公司 | Ball screw prestretching mechanism and prestretching method thereof |
| CN106312595A (en) * | 2016-11-02 | 2017-01-11 | 四川理工学院 | Lead screw supporting structure and precise pre-stretching method thereof |
| CN108581585A (en) * | 2018-07-28 | 2018-09-28 | 重庆宏钢数控机床有限公司 | Stretching device for leading screw pre-stretching |
| CN109048448A (en) * | 2018-09-10 | 2018-12-21 | 宁波海天精工股份有限公司 | A kind of lead screw support construction |
| CN113560933A (en) * | 2021-07-22 | 2021-10-29 | 上海诺倬力机电科技有限公司 | Screw rod stretching support structure and mounting method thereof |
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| C06 | Publication | ||
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| CB02 | Change of applicant information |
Address after: 226000 Jiangsu city of Nantong province Gangzha Yongtong Road Economic Development Zone No. 2 Applicant after: Nantong Guosheng Intelligent Technology Group Limited by Share Ltd Address before: 226000 Jiangsu city of Nantong province Gangzha Yongtong Road Economic Development Zone No. 2 Applicant before: Nantong Guosheng Electromechanical Group Co., Ltd. |
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| COR | Change of bibliographic data | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |