CN102490076A - Method for unloading ball screw for synchronous belt transmission - Google Patents
Method for unloading ball screw for synchronous belt transmission Download PDFInfo
- Publication number
- CN102490076A CN102490076A CN2011103935873A CN201110393587A CN102490076A CN 102490076 A CN102490076 A CN 102490076A CN 2011103935873 A CN2011103935873 A CN 2011103935873A CN 201110393587 A CN201110393587 A CN 201110393587A CN 102490076 A CN102490076 A CN 102490076A
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- ball screw
- driven pulley
- synchronous belt
- bearing
- cover
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- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention discloses a method for unloading a ball screw for synchronous belt transmission. An unloading sleeve is arranged in a motor base at a rear bearing additionally in a coupling structure of a synchronous belt and the ball screw; a deep groove ball bearing is arranged on the unloading sleeve; an inner hole of a driven pulley is enlarged and is sleeved on a bearing; and a force transfer sleeve is arranged at the tail end of the ball screw, is in rigid connection with the ball screw by an expanded sleeve and is in rigid connection with the driven pulley by a positioning pin. The invention has the advantages that: the method is simple and practicable, the main body of the original synchronous belt and ball screw transmission structure is kept constant, and the structure is changed slightly; and compared with the high cost of the ball screw of a numerical control machine, the implementation cost of the ball screw is low. By the method, the service life of the ball screw is prolonged, and the efficiency is improved.
Description
Technical field
The invention belongs to the transmission field in drive technology field, particularly ball screw.
Background technology
In the mechanical transmission structure of numerical control machine feed movement, it is not to adopt servomotor and ball screw directly to connect to come transferring power that a lot of structures are arranged, but comes to connect with ball screw through synchronous band transmission, transmits the power of servomotor, sees Fig. 1.Driven pulley 5 is directly installed on the rearmost end of ball screw 2; Connect through swelling cover 6, this " cantilever " structure that is a kind of is synchronously with 7 tensionings the time (band just has a horizontal pulling force to screw mandrel synchronously); Just received the effect of bending stress at the ball screw 2 axle journal roots that driven pulley 5 places are installed; Simultaneously, when ball screw 2 rotates, transmit the moment of torsion of servomotor 8 again.So the axle journal root that driven pulley 5 places are installed in ball screw 2 rear ends has just received the double reaction plus of moment of torsion and moment of flexure; Axle journal root in cantilevered axle has produced alternate stress; Ball screw 2 very easily because of tired fracture herein, has also repeatedly run into this situation in the real work.Ball screw is not a consumable accessory, and its fracture has directly caused the lathe shut-down.
Summary of the invention
" cantilever " formula is with in the transmission ball screw structure synchronously, because of band tensioning synchronously produces moment of flexure, bending load " is laid down " problem that solves the ball screw fracture.
The present invention is a kind of to be used for synchronously the ball screw unloading method with transmission: at band and ball screw connecting structure synchronously, in the motor cabinet of back supporting place, increase an off-load cover; Put the installation deep groove ball bearing in off-load; The driven pulley endoporus is enlarged, be sleeved on the bearing; At the ball screw tail end power transmission cover is installed, through swelling cover and ball screw rigid connection; Power transmission cover and driven pulley are through the alignment pin rigid connection.
The effect of ball screw is the rectilinear motion that rotatablely moving of servomotor is transformed into moving-member, and it mainly bears moment of torsion, and the bending load that receives must " be laid down ", could guarantee that ball screw continues to run well.Through the inventive method original structure is just improved and to realize " off-load ", the moment of flexure that is applied on the leading screw is transferred on off-load cover and the lathe base.
Like this, driven pulley is not to be directly installed on the ball screw just, puts but be installed in off-load through deep groove ball bearing, connects through the power transmission cover with ball screw, and all the other frame modes are constant.
The present invention has following advantage:
Simple, keep the main body of original synchronous band and ball screw drive mechanism constant, change gets final product a little; With respect to the expensive price of Digit Control Machine Tool ball screw, the present invention realizes that cost is low; Through the present invention, prolonged the lathe life-span, improved efficient.
Description of drawings
Fig. 1 is band and ball screw drive mechanism sketch map synchronously
Synchronous band and ball screw drive mechanism sketch map after Fig. 2 improves.
The specific embodiment
(see figure 2) in the present embodiment, the structure of the preceding supporting 1 of ball screw 2, back supporting 3 all remains unchanged, and in the motor cabinet 4 at back supporting 3 places, increases off-load cover 13 of design; On off-load cover 13, deep groove ball bearing 14 is installed; Driven pulley 5 designs again, and endoporus enlarges, and is sleeved on the bearing 14; At ball screw 2 tail ends power transmission cover 15 is installed, through swelling cover 6 and ball screw 2 rigid connections; Power transmission cover 15 passes through alignment pin 12 rigid connections with driven pulley 5.Like this, driven pulley 5 is not to be directly installed on the ball screw 2 just, but is installed on the off-load cover 13 through deep groove ball bearing 14, connects through power transmission cover 15 with ball screw 2.
Work as assembled, when needing tensioning to be with synchronously, motor 8 outwards moves under the pulling of bolt 10 together with installing plate 9, driving pulley 11, and is fixed because of driven pulley 5, and will be with 7 tensions synchronously.Synchronously with 7 tension that produce on driven pulley 5, act on the off-load cover 13 through deep groove ball bearing 14 again, thereby act on the motor cabinet 4, just act on the lathe base.Like this, ball screw 2 does not receive horizontal pulling force, and the moment of flexure of coming 7 tensionings of motor synchronizing band to produce " has been laid down ".Simultaneously, through driving pulley 11, be with 7 to be delivered on the driven pulley 5 synchronously, be delivered on the power transmission cover 15 through alignment pin 12 again, be delivered on the ball screw 2 through swelling cover 6 again from the moment of torsion (rotatablely moving) of motor 8 output.Ball screw 2 has just obtained the power of rotation, has only received torsional interaction.
" cantilever " formula through the such scheme repacking is with transmission ball screw structure synchronously; Effectively " laid down " because of being with tensioning to act on the bending load on the ball screw synchronously; Make ball screw only transmit the moment of torsion of motor, guaranteed the service life of ball screw.
Claims (1)
1. ball screw unloading method that is used for synchronously with transmission in band synchronously and ball screw connecting structure, increases an off-load cover in the motor cabinet of back supporting place; Put the installation deep groove ball bearing in off-load; The driven pulley endoporus is enlarged, be sleeved on the bearing; At the ball screw tail end power transmission cover is installed, through swelling cover and ball screw rigid connection; Power transmission cover and driven pulley are through the alignment pin rigid connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103935873A CN102490076A (en) | 2011-12-02 | 2011-12-02 | Method for unloading ball screw for synchronous belt transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103935873A CN102490076A (en) | 2011-12-02 | 2011-12-02 | Method for unloading ball screw for synchronous belt transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102490076A true CN102490076A (en) | 2012-06-13 |
Family
ID=46181959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103935873A Pending CN102490076A (en) | 2011-12-02 | 2011-12-02 | Method for unloading ball screw for synchronous belt transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102490076A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773753A (en) * | 2012-08-14 | 2012-11-14 | 中传重型机床有限公司 | Horizontal feeding device of numerical control vertical lathe with maximum machining diameter of 2.5m |
-
2011
- 2011-12-02 CN CN2011103935873A patent/CN102490076A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773753A (en) * | 2012-08-14 | 2012-11-14 | 中传重型机床有限公司 | Horizontal feeding device of numerical control vertical lathe with maximum machining diameter of 2.5m |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120613 |