CN202356870U - Numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table - Google Patents
Numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table Download PDFInfo
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- CN202356870U CN202356870U CN2011204602223U CN201120460222U CN202356870U CN 202356870 U CN202356870 U CN 202356870U CN 2011204602223 U CN2011204602223 U CN 2011204602223U CN 201120460222 U CN201120460222 U CN 201120460222U CN 202356870 U CN202356870 U CN 202356870U
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Abstract
The utility model relates to a numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table which comprises a worktable body, as well as a hollow main shaft and a worm gear hub arranged on the worktable body, wherein an encoder is arranged on the hollow main shaft, the worm gear hub can rotate around the hollow main shaft through a radial support, a worm gear is fixedly connected to the worm gear hub, a worm, a planetary gear box and a servomotor which are connected sequentially are respectively arranged on each of the two sides of the worktable body, and the worms on the two sides of the worktable body are meshed with the worm gear, so as to form a dual drive structure capable of providing driving torque, or a dual drive clearance-eliminating structure capable of providing driving torque and moment of resistance respectively. The utility model has the benefits as follows: the problem of low transmission accuracy of the large-scale rotary table can be solved, the transmission stationarity can be effectively improved, and the service life of the rotary table is prolonged.
Description
Technical field
The utility model belongs to Digit Control Machine Tool and makes the equipment technology field with the basis, relates to large-scale precision Metal Cutting Machine Tool technological equipment, particularly relates to the two crack rotary tables that disappear that drive of a kind of numerical control large-scale precision.
Background technology
The large-sized numerical control rotary table is the big specification digital-control boring-milling machine of all kinds of top grades, gantry machining center, numerical control gear milling machine, gear shapping machine, the indispensable functional part of gear grinding machines; Can under the driving of related system, carry out numerical control scale-division, or workpiece turned round cut continuously with the lathe interlock to workpiece.In working angles NC rotary table stressed be unidirectional, two-way having concurrently; And a lot of situation are dynamically to realize the continuous cut to workpiece down; The corner accuracy of part to be processed (like wind-powered electricity generation gear, cam etc.), surface roughness etc. are very high to the requirement of lathe and rotary table, and the transmission accuracy of current large-sized numerical control rotary table is still undesirable.
Before the torque motor direct driving technologies was come out, the driving of large-sized numerical control rotary table was the world of gear-wheel gear-ring transmission and worm and gear transmission always.Comparatively speaking; Torque motor direct driving technologies cost higher (direct driving motor, digital control system, supporting driver price very expensive); Rotating speed is very fast; Relatively be fit to combined machine and use, therefore, gear-wheel gear-ring transmission and worm and gear transmission are still large-scale and the important type of drive heavy type numerical control rotary table.As everyone knows; The worm and gear transmission has higher transmission accuracy and transmission stability; But receive the influence of factors such as existing process equipment, assembling and setting and variations in temperature; Inevitably there is the gap in the worm gear of existing large-sized numerical control rotary table in transmission process, to such an extent as to influence transmission accuracy.And in high-precision transmission system, the effective measures that improve transmission accuracy reduce driving error and drive gap exactly; Driving error can adopt modes such as encoder or magnetic railings ruler are installed to reduce, and drive gap then can be eliminated through anti-backlash mechanism.Basically all be to adopt the disappear method in crack of machinery to drive gap before this, as: the crack mode that disappears of two-section worm screw, the two helical pitch worm gears crack mode that disappears, the eccentric shell type worm gear crack mode that disappears.
In long-term processing and manufacturing and use, we find the not enough problem of worm and gear transmission geared surface contact stiffness in the above-mentioned crack mode that disappears, and are suitable for usually in the precision drive of underload; Shake when chatter when being used for high pulling torque, the fashionable meeting in heavy load field and having caused the continuous working angles worm gear output of large-sized numerical control rotary table and fast rotation, machine can't operate as normal when serious, and then machine is scrapped ahead of time; And the above-mentioned machinery crack mode that disappears can only reduce drive gap and can not eliminate fully, is applied in that (like the accurate digital control gear grinding machines) have significant limitation in the large-scale precision transmission system.
The utility model content
The utility model is to solve the problems of the technologies described above a kind of two crack rotary tables that disappear that drive of numerical control large-scale precision with higher transmission accuracy, transmission stability are provided.
The technical scheme that the utility model solves the problems of the technologies described above is following: the two crack rotary tables that disappear that drive of a kind of numerical control large-scale precision; Comprise the workbench body; And be arranged on hollow spindle and the worm gear hub on the said workbench body; Said hollow spindle is provided with encoder, and said worm gear hub can be fixedly connected with worm gear on the said worm gear hub around said hollow spindle rotation through radial support; The both sides of said workbench body are respectively equipped with worm screw, epicyclic gearbox and the servomotor that connects successively; The worm screw of said workbench body both sides all meshes with said worm gear, forms two Drive Structure that driving moment is provided simultaneously, and two gap-eliminating structures that drive of driving moment, the moment of resistance perhaps are provided respectively.
Further, the engagement of the worm screw of said workbench body both sides and said worm gear can provide vary in size, moment in the opposite direction.
Further, the worm screw of said workbench both sides respectively with the central point of the cross section of said worm gear position engaged and said hollow spindle on same straight line.
The beneficial effect of the utility model is: the utility model is through installing bi-motor, twin worm formula double driving mechanism in rotary table body both sides; Make when two servomotors rotate; Double driving mechanism all can provide the driving moment or the moment of resistance; Thereby make that twin worm provides driving moment simultaneously when the needs driven in common, when normals operation needs elimination drive gap the Dual-motors Driving twin worm provide vary in size, moment in the opposite direction is used to eliminate the drive gap between the worm gear, thereby solved the low problem of huge revolving table transmission accuracy; And can improve transmission stability effectively, prolong the service life of rotary table.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model structural representation.
The specific embodiment
Below in conjunction with accompanying drawing the principle and the characteristic of the utility model are described, institute gives an actual example and only is used to explain the utility model, is not the scope that is used to limit the utility model.
As depicted in figs. 1 and 2; The two crack rotary tables that disappear that drive of a kind of numerical control large-scale precision; Comprise workbench body 1, and be arranged on hollow spindle 6 and worm gear hub 4 on the said workbench body 1, said hollow spindle 6 is provided with encoder 5; Said worm gear hub 4 can be around said hollow spindle 6 rotations through radial support 7; Be fixedly connected with worm gear 3 on the said worm gear hub 4, the both sides of said workbench body 1 are respectively equipped with worm screw 11, epicyclic gearbox 10 and the servomotor 9 that connects successively, and the worm screw 11 of said workbench body 1 both sides all meshes with said worm gear 3; Form two Drive Structure that driving moment is provided simultaneously, two gap-eliminating structures that drive of driving moment, the moment of resistance perhaps are provided respectively.
The worm screw 11 of said workbench both sides respectively with the central point of the cross section of said worm gear 3 position engaged and said hollow spindle 6 on same straight line.
When the rotary table normal operation needs to eliminate the worm gear drive gap; The servomotor 9 of workbench body both sides drives two worm screws 11 respectively moment in the opposite direction is provided; Workbench is to the big direction revolution of moment; Provide moment big worm drive worm gear revolution, the worm screw that moment is little stops the worm gear revolution, thereby eliminates the drive gap that single worm-drive is difficult to avoid; When rotary table needed high pulling torque, the servomotor 9 of workbench body both sides drove two worm screw 11 providers to identical moment, the revolution of driven in common worm gear.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (3)
1. two crack rotary tables that disappear that drive of a numerical control large-scale precision; Comprise the workbench body; And be arranged on hollow spindle and the worm gear hub on the said workbench body, and said hollow spindle is provided with encoder, and said worm gear hub can be around said hollow spindle rotation through radial support; Be fixedly connected with worm gear on the said worm gear hub; It is characterized in that: the both sides of said workbench body are respectively equipped with worm screw, epicyclic gearbox and the servomotor that connects successively, and the worm screw of said workbench body both sides all meshes with said worm gear, form two Drive Structure that driving moment is provided simultaneously; Perhaps, the worm screw of said workbench body both sides provides two gap-eliminating structures that drive of driving moment, the moment of resistance respectively.
2. the two crack rotary tables that disappear that drive of numerical control large-scale precision according to claim 1 is characterized in that: the worm screw of said workbench body both sides and the engagement of said worm gear can provide and vary in size, moment in the opposite direction is used to eliminate the worm gear gap.
3. the two crack rotary tables that disappear that drive of numerical control large-scale precision according to claim 1 is characterized in that: the worm screw of said workbench both sides respectively with the central point of the cross section of said worm gear position engaged and said hollow spindle on same straight line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204602223U CN202356870U (en) | 2011-11-18 | 2011-11-18 | Numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204602223U CN202356870U (en) | 2011-11-18 | 2011-11-18 | Numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202356870U true CN202356870U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204602223U Expired - Lifetime CN202356870U (en) | 2011-11-18 | 2011-11-18 | Numerically-controlled large-scale precision dual-drive clearance-eliminating rotary table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202356870U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121168A (en) * | 2011-11-18 | 2013-05-29 | 烟台环球数控装备有限公司 | Numerical-control large-scale precise dual-drive gap removing rotating working table |
| CN107414510A (en) * | 2017-08-31 | 2017-12-01 | 宜宾学院 | A kind of NC rotary table of adjustable gearratio |
| CN108799439A (en) * | 2018-07-20 | 2018-11-13 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of worm and gear gear composite driving mechanism that large torque is provided |
-
2011
- 2011-11-18 CN CN2011204602223U patent/CN202356870U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103121168A (en) * | 2011-11-18 | 2013-05-29 | 烟台环球数控装备有限公司 | Numerical-control large-scale precise dual-drive gap removing rotating working table |
| CN107414510A (en) * | 2017-08-31 | 2017-12-01 | 宜宾学院 | A kind of NC rotary table of adjustable gearratio |
| CN108799439A (en) * | 2018-07-20 | 2018-11-13 | 中国航空工业集团公司北京航空精密机械研究所 | A kind of worm and gear gear composite driving mechanism that large torque is provided |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: YANTAI UNIVERSAL MACHINE TOOL EQUIPMENT CO., LTD. Free format text: FORMER NAME: YANTAI UNIVERSAL CNC EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Fushan District, Shandong city of Yantai province 265500 poly Road No. 563 Patentee after: Yantai Universal Machine Tool Equipment Co., Ltd. Address before: Fushan District, Shandong city of Yantai province 265500 poly Road No. 563 Patentee before: Yantai Universal CNC Equipment Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |