CN108581584A - The steel bushing combination unit being pre-stretched convenient for leading screw - Google Patents
The steel bushing combination unit being pre-stretched convenient for leading screw Download PDFInfo
- Publication number
- CN108581584A CN108581584A CN201810849616.4A CN201810849616A CN108581584A CN 108581584 A CN108581584 A CN 108581584A CN 201810849616 A CN201810849616 A CN 201810849616A CN 108581584 A CN108581584 A CN 108581584A
- Authority
- CN
- China
- Prior art keywords
- bearing
- leading screw
- steel bushing
- bushing
- combination unit
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 210000004907 gland Anatomy 0.000 claims description 17
- 229910001018 Cast iron Inorganic materials 0.000 claims description 14
- 230000000694 effects Effects 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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
-
- 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
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The present invention relates to leading screws to be pre-stretched field, disclose the steel bushing combination unit being pre-stretched convenient for leading screw, including the support element being set on leading screw, through-hole is offered in the middle part of support element, and the bearing steel bushing being set on leading screw is installed in through-hole, holding tank is equipped in bearing steel bushing, bearing group is arranged on leading screw, bearing group is located in holding tank, and one end and the bearing steel bushing of bearing group offset, and the other end of bearing group is equipped with regulating mechanism.The technical program solves the problem of both ends in the prior art in leading screw are carried out at the same time pre-stretching, leading screw torsional deformation is easily caused due to both ends unbalance stress.
Description
Technical field
The present invention relates to leading screws to be pre-stretched field, and in particular to the steel bushing combination unit being pre-stretched convenient for leading screw.
Background technology
Leading screw is the basic mechanical driving device in NC machine tool feed system, and the precision of leading screw will have a direct impact on numerical control machine
The machining accuracy of bed.Lead screw will produce high-speed rotation during the work time, and lead screw can generate heat because of rotation at this time.It is cold according to heat expansion
The principle of contracting, leading screw fever can expand deformation, to increase helical pitch, influence the precision of transmission and the positioning of leading screw.
It is thermally expanded to compensate leading screw, usually pre-stretching processing is carried out to leading screw so that when leading screw operational heat,
The pre-stretching amount of leading screw can offset each other with thermal expansion amount so that leading screw length in the case where internal tensile stress declines does not occur
Variation.The fixed mounting means in leading screw generally use both ends is installed in the prior art, by being arranged simultaneously at leading screw both ends
Locking member carries out both ends stretching, but this both ends are carried out at the same time the mode of pre-stretching since stress is distinguished at both ends, can lead to silk
Thick stick both ends unbalance stress easily causes the stretching torsional deformation of leading screw.
Invention content
The invention is intended to provide the steel bushing for being convenient for leading screw to be pre-stretched combination unit, to solve in the prior art in leading screw
Both ends the problem of being carried out at the same time pre-stretching, leading screw torsional deformation is easily caused due to both ends unbalance stress.
In order to achieve the above objectives, technical scheme is as follows：It is combined the unit convenient for the steel bushing that leading screw is pre-stretched,
Including the support element being set on leading screw, through-hole is offered in the middle part of support element, the axis being set on leading screw is installed in through-hole
Steel bushing to be held, holding tank is equipped in bearing steel bushing, bearing group is arranged on leading screw, bearing group is located in holding tank, and the one of bearing group
End offsets with bearing steel bushing, and the other end of bearing group is connected with regulating mechanism.
The steel bushing combination unit being pre-stretched convenient for leading screw using above-mentioned technical proposal, when practical application：Support element is used
In the end of fixed leading screw, the one degree of freedom of leading screw is limited, stable support, support element are provided for subsequent prestretching process
The through-hole that opens up of middle part also function to the effect supported and fixed for accommodating bearing steel bushing, bearing steel bushing, while for accommodating
With the position of limited bearing group, regulating mechanism is used to transmit the abutting power of pre-stretching to leading screw, will push against power and is passed by bearing group
It is delivered on bearing steel bushing and support element so that leading screw generates amount of tension with respect to bearing steel bushing and support element, in the leading screw course of work
In, which offsets each other with thermal expansion amount, is compensated as screw travel.
The advantageous effect of the technical program is：
1. being the prestretching of force side by the way of single-ended pre-stretching in the technical program, when being pre-stretched to leading screw
Stretch is unified, avoids the both ends in the prior art in leading screw and is carried out at the same time pre-stretching, is easily caused due to both ends unbalance stress
The problem of leading screw torsional deformation.
2. on the one hand the technical program will be arranged to support element and bearing steel bushing to the support of leading screw to be supported jointly can reduce
On the other hand the difficulty of processing can make bearing steel bushing and support element share the power of prestretching process jointly, what reduction was respectively subject to
Abrasion, extends the service life of equipment.
Further, regulating mechanism includes the bearing inner race bushing being set on leading screw, one end of bearing inner race bushing and axis
It holds group to offset, the other end of bearing inner race bushing is equipped with the rotating nuts connecting with threads of lead screw, is arranged outside bearing inner race bushing
There are bearing outer ring gland, bearing outer ring gland to offset with bearing steel bushing.
Rotating nuts are rotated, rotating nuts can be rotated relative to leading screw and be moved axially along leading screw, since rotating nuts are turning
It can be limited by bearing inner race bushing during dynamic so that rotating nuts generate axial abutting power, axis to bearing inner race bushing
Remake and use in bearing group to power is pushed against, bearing group will push against in force effect to bearing steel bushing and support element again, bearing steel bushing and
Support element, which has rotating nuts, reversed pushes against power so that rotating nuts can not relative support generate displacement, still, rotate spiral shell
Mother the axial of leading screw can generate displacement relatively, i.e. leading screw can be stretched to the opposite direction of rotating nuts displacement, in the process,
The application of pretightning force is carried out by rotating nuts so that leading screw circumferential direction uniform force, amount of tension are consistent.
Further, the axial section shape of through-hole is ladder-like.
Into a ladder by through-hole setting, on the one hand in order to accommodate bearing steel bushing so that bearing steel bushing and support element cooperation are tight
It is close, ensure the stable delivery of support force, meanwhile, through-hole setting is stepped can be also fixed bearing steel set and clamping, protected
Both cards part is stably connected with.
Further, support element is cast-iron chock.
Due to the technical program support element and the cooperation support of bearing steel bushing, the rigidity of bearing steel bushing supports preload enough
Power, thus support element is arranged to cast-iron chock, cast-iron chock reduces equipment relative to traditional cast-steel chock
Input.
Further, bearing outer ring gland is equipped with the protrusion being stuck in bearing steel bushing, protrusion with one end that bearing steel bushing offsets
It offsets with bearing group.
Bearing outer ring gland, on the one hand can be with bearing inner race bushing and bearing when by the axial abutting power of rotating nuts
Group collective effect pushes against bearing steel bushing so that axial abutting power is uniformly applied to bearing steel and puts on；Another aspect bearing outer ring
Protrusion on gland can squeeze bearing group so that protrusion to the position of bearing group push against admittedly jointly with bearing inner race bushing
It is fixed；Simultaneously as protrusion is stuck in bearing steel bushing, it is also ensured that being stably connected between bearing outer ring gland and bearing steel bushing.
Further, bearing group is two angular contact bearings, and two angular contact bearing directions are opposite.
Angular contact bearing is used for Auxiliary support leading screw, while two angular contact bearing directions are reversed so that in leading screw
Axial abutting power can be also saved in prestretching process, ensure the drawing effect of leading screw.
Further, adjusting pad is equipped between cast-iron chock and bearing steel bushing.
The effect of adjusting pad is to carry out thickness match grinding according to the rigging error of bearing steel bushing and cast-iron chock.
Description of the drawings
Fig. 1 is the structure sectional view for the steel bushing combination unit being pre-stretched convenient for leading screw in the embodiment of the present invention.
Specific implementation mode
It is further described below by specific implementation mode：
Reference numeral in Figure of description includes：Leading screw 1, cast-iron chock 2, bearing steel bushing 3, angular contact bearing 4, axis
Hold inner ring bushing 5, rotating nuts 6, bearing outer ring gland 7, adjusting pad 8, bolt 9, protrusion 10.
Embodiment is substantially as shown in Fig. 1：Convenient for the steel bushing combination unit that leading screw is pre-stretched, including it is set in leading screw
Support element on 1, the support element in the present embodiment are cast-iron chock 2, and the middle part of cast-iron chock 2 offers stair-stepping logical
Hole is equipped with the bearing steel bushing 3 being set on leading screw 1 in through-hole, and adjusting pad is equipped between cast-iron chock 2 and bearing steel bushing 3
8, the effect of adjusting pad 8 is to carry out thickness match grinding according to the rigging error of bearing steel bushing 3 and cast-iron chock 2.Bearing steel bushing 3
It is interior to be equipped with holding tank, bearing group is arranged on leading screw 1, bearing group is two angular contact bearings 4, two 4 directions of angular contact bearing
On the contrary, i.e. two 4 back-to-back settings of angular contact bearing, bearing group are located in holding tank, right end and 3 phase of bearing steel bushing of bearing group
It supports, the left end of bearing group is connected with regulating mechanism.
Regulating mechanism includes the bearing inner race bushing 5 being set on leading screw 1, the right end and bearing group of bearing inner race bushing 5
It offsets, the left end of bearing inner race bushing 5 is connected with the rotating nuts 6 being threadedly coupled with leading screw 1, is arranged outside bearing inner race bushing 5
There are bearing outer ring gland 7, bearing outer ring gland 7 to offset with bearing steel bushing 3, and leads between bearing outer ring gland 7 and bearing steel bushing 3
The fixation of bolt 9 is crossed, one end that bearing outer ring gland 7 offsets with bearing steel bushing 3 is integrally formed with the protrusion being stuck in bearing steel bushing 3
10, protrusion 10 offsets with bearing group.
Use the concrete operations that the technical program is pre-stretched leading screw 1 for：Rotate rotating nuts 6 so that rotation spiral shell
Mother 6 axially to the right, when the right end of rotating nuts 6 offsets with bearing inner race bushing 5, is rotated further rotation spiral shell along leading screw 1
Mother 6 can then make the axial direction that rotating nuts 6 apply to the right bearing inner race bushing 5 push against power, and bearing inner race bushing 5 squeezes to the right
Bearing group makes bearing group be stably fixed in holding tank, since two 4 directions of angular contact bearing are on the contrary, axial direction can be saved
Push against power so that axial abutting power was not consumed acts on bearing steel bushing 3.
Meanwhile rotating nuts 6 can also apply bearing outer ring gland 7 axial abutting power to the right so that bearing outer ring pressure
Lid 7 and the left part for pushing against bearing steel bushing 3 to the right, the protrusion 10 on bearing outer ring gland 7 understand with bearing inner race bushing 5 jointly to
Right extruding bearing group carries out abutting fixation so that bearing group forms surely bearing steel bushing 3 to the position of two angular contact bearings 4
Fixed inside support, ensures the uniform force of bearing steel bushing 3.
It, can be to bearing group and bearing outer ring gland after bearing steel bushing 3 and cast-iron chock 2 are pushed against power by axial direction to the right
7 apply axial support force to the left, and rotating nuts 6 can not opposite cast-iron chock 2 under the action of axial support force to the left
Displacement is generated to the right, and still, since rotating nuts 6 are threaded on leading screw 1, rotating nuts 6 leading screw 1 can generate to the right relatively
Displacement, i.e. leading screw 1 are stretched to the left by rotating nuts 6, generate pre-stretching amount.
The present embodiment is pre-stretched leading screw 1 by rotating rotating nuts 6, and the force side of pre-stretching is unique, and passes through
When bearing inner race bushing 5 and bearing steel bushing 3 stretch leading screw 1 so that the circumferential uniform force of leading screw 1 avoids leading screw 1 from existing
Generate crooked in prestretching process, leading screw 1 generates pre-stretching amount after pre-stretching, when leading screw 1 is during the work time due to high speed
When rotation generates heat and generates thermal expansion, which offsets each other with thermal expansion amount, is compensated as 1 stroke of leading screw, ensures silk
The precision of transmission and the positioning of thick stick 1.
Above-described is only the embodiment of the present invention, the common sense such as well known specific technical solution and/or characteristic in scheme
It does not describe excessively herein.It should be pointed out that for those skilled in the art, before not departing from technical solution of the present invention
It puts, several modifications and improvements can also be made, these should also be considered as protection scope of the present invention, these all do not interfere with this
Invent the effect and patent practicability implemented.The scope of protection required by this application should be based on the content of the claims,
The records such as the specific implementation mode in specification can be used for explaining the content of claim.
Claims (7)
1. the steel bushing combination unit being pre-stretched convenient for leading screw, it is characterised in that：Including the support element being set on leading screw, branch
Through-hole is offered in the middle part of support member, and the bearing steel bushing being set on leading screw is installed in through-hole, holding tank is equipped in bearing steel bushing,
Bearing group is arranged on the leading screw, bearing group is located in holding tank, and one end and the bearing steel bushing of bearing group offset, bearing group
The other end is connected with regulating mechanism.
2. the steel bushing combination unit according to claim 1 being pre-stretched convenient for leading screw, it is characterised in that：The adjusting
Mechanism includes the bearing inner race bushing being set on leading screw, and one end and the bearing group of bearing inner race bushing offset, bearing inner race lining
The other end of set is equipped with the rotating nuts being connect with threads of lead screw, and bearing outer ring gland, bearing are arranged with outside bearing inner race bushing
Outer ring gland offsets with bearing steel bushing.
3. the steel bushing combination unit according to claim 1 being pre-stretched convenient for leading screw, it is characterised in that：The through-hole
Axial section shape be it is ladder-like.
4. being combined the unit according to any steel bushings being pre-stretched convenient for leading screw of claim 1-3, it is characterised in that：Institute
It is cast-iron chock to state support element.
5. the steel bushing combination unit according to claim 4 being pre-stretched convenient for leading screw, it is characterised in that：The bearing
Outer ring gland is equipped with the protrusion being stuck in bearing steel bushing with one end that bearing steel bushing offsets, and the protrusion offsets with bearing group.
6. the steel bushing combination unit according to claim 5 being pre-stretched convenient for leading screw, it is characterised in that：The bearing
Group is two angular contact bearings.
7. the steel bushing combination unit according to claim 4 being pre-stretched convenient for leading screw, it is characterised in that：The cast iron
Adjusting pad is equipped between bearing block and bearing steel bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849616.4A CN108581584A (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for leading screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810849616.4A CN108581584A (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for leading screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108581584A true CN108581584A (en) | 2018-09-28 |
Family
ID=63618426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810849616.4A Pending CN108581584A (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for leading screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108581584A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927350A (en) * | 2021-11-18 | 2022-01-14 | 江苏大卫精工科技有限公司 | Screw rod supporting bearing installation assembly with integrally-stretched bearing sleeve |
| CN116021322A (en) * | 2023-03-29 | 2023-04-28 | 湖南中大创远数控装备有限公司 | Ball screw prestretching structure convenient for secondary assembly, machine tool and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377145A2 (en) * | 1988-03-14 | 1990-07-11 | Institut Für Produktionstechnik Karlsruhe Gmbh | Axial pretension-adjusting device for roller bearings and spindle nuts |
| KR20110070934A (en) * | 2009-12-19 | 2011-06-27 | 두산인프라코어 주식회사 | Pre-load structure of damage prevention by heat displacements for the bearing of transfer shaft |
| CN103143971A (en) * | 2013-03-01 | 2013-06-12 | 江苏松野数控科技有限公司 | Pre-drawing structure of ball screw |
| CN203712385U (en) * | 2014-03-04 | 2014-07-16 | 浙江迎泰机床有限公司 | Machine tool screw rod fixing end structure |
| CN105817940A (en) * | 2016-05-24 | 2016-08-03 | 深圳市创世纪机械有限公司 | Transmission assembly and numerical control machine tool |
| CN106312595A (en) * | 2016-11-02 | 2017-01-11 | 四川理工学院 | Lead screw supporting structure and precise pre-stretching method thereof |
| CN206500915U (en) * | 2017-03-06 | 2017-09-19 | 常州铸鼎机械有限公司 | The pre-stretching structure of Ball Bearing Lead Screw Fit |
| CN208681084U (en) * | 2018-07-28 | 2019-04-02 | 重庆宏钢数控机床有限公司 | The steel bushing combination unit being pre-stretched convenient for lead screw |
-
2018
- 2018-07-28 CN CN201810849616.4A patent/CN108581584A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0377145A2 (en) * | 1988-03-14 | 1990-07-11 | Institut Für Produktionstechnik Karlsruhe Gmbh | Axial pretension-adjusting device for roller bearings and spindle nuts |
| KR20110070934A (en) * | 2009-12-19 | 2011-06-27 | 두산인프라코어 주식회사 | Pre-load structure of damage prevention by heat displacements for the bearing of transfer shaft |
| CN103143971A (en) * | 2013-03-01 | 2013-06-12 | 江苏松野数控科技有限公司 | Pre-drawing structure of ball screw |
| CN203712385U (en) * | 2014-03-04 | 2014-07-16 | 浙江迎泰机床有限公司 | Machine tool screw rod fixing end structure |
| CN105817940A (en) * | 2016-05-24 | 2016-08-03 | 深圳市创世纪机械有限公司 | Transmission assembly and numerical control machine tool |
| CN106312595A (en) * | 2016-11-02 | 2017-01-11 | 四川理工学院 | Lead screw supporting structure and precise pre-stretching method thereof |
| CN206500915U (en) * | 2017-03-06 | 2017-09-19 | 常州铸鼎机械有限公司 | The pre-stretching structure of Ball Bearing Lead Screw Fit |
| CN208681084U (en) * | 2018-07-28 | 2019-04-02 | 重庆宏钢数控机床有限公司 | The steel bushing combination unit being pre-stretched convenient for lead screw |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113927350A (en) * | 2021-11-18 | 2022-01-14 | 江苏大卫精工科技有限公司 | Screw rod supporting bearing installation assembly with integrally-stretched bearing sleeve |
| CN116021322A (en) * | 2023-03-29 | 2023-04-28 | 湖南中大创远数控装备有限公司 | Ball screw prestretching structure convenient for secondary assembly, machine tool and method |
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