CN203395102U - Worm and gear transmission mechanism capable of automatically eliminating clearance - Google Patents
Worm and gear transmission mechanism capable of automatically eliminating clearance Download PDFInfo
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- CN203395102U CN203395102U CN201320394558.3U CN201320394558U CN203395102U CN 203395102 U CN203395102 U CN 203395102U CN 201320394558 U CN201320394558 U CN 201320394558U CN 203395102 U CN203395102 U CN 203395102U
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Abstract
The utility model relates to a worm and gear transmission mechanism capable of automatically eliminating a clearance. The worm and gear transmission mechanism mainly comprises a worm, a worm gear, a shell body, a press cover, a bearing, a worm box and sliding balls, wherein the worm is mounted in the worm box by two tapered roller bearings; a lower worm box pressing end cover and an upper worm box pressing end cover are respectively arranged at the two ends of the worm box; four prelowing strong springs are arranged at the back, where the worm and the worm gear are meshed, of the worm box; spring force adjusting jackscrews are connected to the strong springs; sliding balls are arranged between the worm box and worm adjusting plates at the left and right sides; the worm adjusting plates are pressed by the adjusting jackscrews through the shell body; a deep groove ball bearing is arranged at each of two shaft heads of the worm. Theoretical zero clearance is realized by the design and the assembly of the worm and the worm gear; the clearance can be automatically adjusted and eliminated after the clearance occurs in the use; the transmission precision can be greatly improved in transmission the direction of which is frequently changed, the structure is simple and compact, and the use, processing and maintenance costs are low.
Description
Technical field
The utility model relates to a kind of driving mechanism, is specifically related to a kind of Worm and worm-wheel gearing that can automatically eliminate backlass.
Background technique
At present, known Worm and worm-wheel gearing often adopts the nonadjustable structural design of centre distance, because worm and worm wheel can not compress, can between the non-contact flank of tooth of worm and worm wheel tooth, produce larger backlass, present stage good worm-gear speed reducer backlass angle 1 ' to 6 ' between, the transmission accuracy that this gap often changes the driving mechanism of sense of rotation to needs has larger impact.If there are 3 ′ gaps, the output shaft of worm and gear impulsion mechanism is as the B axle of lathe, make the main shaft of lathe obtain the motion of yaw, when the cutting edge roundness on main shaft is 500mm to the distance at worm and gear output shaft center, the error producing because of its backlass is π * 2*500*3/60/360 ≈ 0.436mm, therefore can greatly reduce the machining accuracy of lathe.Because centre distance can not be adjusted, in use after break-in, certainly lead to wearing and tearing, backlass is increased, and structure cannot be adjusted compensation automatically, the backlass existing in machine tooling like this can cause the rigidity of lathe not enough, and then affects quality of processing and the precision of workpiece.Especially present stages four axle or the yaw of five-axis machine tool or the Worm Wheel System that revolving table adopts, complex structure, use, maintenance and processing cost are expensive, manufacturing efficiency is low, thus present stages four axle and the machine cost of five axle degree of precision high, price.
Summary of the invention
The deficiency that causes machine tooling quality and precision to reduce for overcoming backlass that existing Worm and worm-wheel gearing can not adjust generation because of centre distance, the utility model provides a kind of automatic anti-backlash worm wheel worm gearing, when gap appears in worm gear and worm screw, centre distance can be adjusted automatically, in order to eliminate backlass, improve process system rigidity, thereby improve lathe transmission accuracy and rigidity.
The utility model solves the technological scheme that its technical problem adopts: a kind of automatic anti-backlash worm wheel worm gearing, its structure is mainly by worm screw, worm gear, housing, gland, bearing, worm screw box, advance ball forms, described worm screw is contained in a worm screw box that can radially slide along worm gear by two tapered roller bearings, one of described worm screw passes from worm screw box, and at axle head, flexible coupling is housed, described worm screw box two ends are respectively equipped with worm screw box and compress lower end cap and worm screw box compression upper end cap, described worm screw box compresses lower end cap and worm screw box compression upper end cap is connected by screw on housing, described worm screw box upper end cap compresses lower end cap by advance ball and worm screw box respectively with worm screw box lower end cap outside and is connected with worm screw box compression upper end cap, described worm screw box has been provided with four pre-pressing brute springs at the back side of worm and wheel engagement, described brute spring is fixed on housing by spring seat, on described brute spring, be connected with spring and adjust power jackscrew, the worm screw of described worm screw box and the right and left is adjusted between plate and is equipped with advance ball, described worm screw is adjusted plate outside and is provided with adjustment jackscrew, described adjustment jackscrew is adjusted plate by housing by worm screw and is compressed, a deep groove ball bearing is respectively equipped with in two shaft head positions of described worm gear, outer ring and the housing of one of them deep groove ball bearing are combined together, outer ring and the gland of another deep groove ball bearing are combined together, the inner ring of described deep groove ball bearing coordinates with the spindle nose of worm gear.
On two spindle noses of described worm gear, an oil sealing is respectively housed.
The utlity model has following beneficial effect: worm and gear guarantees zero clearance in theory in design and fit on, in use, occur automatically adjusting elimination behind gap, while applying, can greatly improve transmission accuracy in the transmission that often changes sense of rotation, and simple and compact for structure, use, processing and maintenance cost are low.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the A-A of Fig. 1 is to sectional view.
In figure, 1, housing, 2, deep groove ball bearing, 3, oil sealing, 4, worm gear, 5, worm screw, 6, worm screw box, 7, advance ball, 8, worm screw is adjusted plate, and 9, adjust jackscrew, 10, brute spring, 11, spring seat, 12, spring is adjusted power jackscrew, and 13, worm screw box lower end cap, 14, worm screw box compresses lower end cap, 15, screw, 16, tapered roller bearing, 17, worm screw box upper end cap, 18, worm screw box compresses upper end cap, and 19, flexible coupling, 20, gland.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated
A kind of automatic anti-backlash worm wheel worm gearing, its structure is mainly by worm screw 5, worm gear 4, housing 1, gland 20, bearing, worm screw box 6, advance ball 7 forms, described worm screw 5 is contained in a worm screw box 6 that can radially slide along worm gear 4 by two tapered roller bearings 16, 5 one of described worm screws pass from worm screw box 6, and at axle head, flexible coupling 19 is housed, described worm screw box 6 two ends are respectively equipped with worm screw box and compress lower end cap 14 and worm screw box compression upper end cap 18, described worm screw box compresses lower end cap 14 and worm screw box compression upper end cap 18 is connected on housing 1 by screw 15, described worm screw box upper end cap 17 compresses lower end cap 14 by advance ball 7 and worm screw box respectively with worm screw box lower end cap 13 outsides and is connected with worm screw box compression upper end cap 18, described worm screw box 6 has been provided with four pre-pressing brute springs 10 at worm screw 5 and the back side of worm gear 4 engagements, described brute spring 10 is fixed on housing 1 by spring seat 11, on described brute spring 10, be connected with spring and adjust power jackscrew 12, the worm screw of described worm screw box 6 and the right and left is adjusted between plate 8 and is equipped with advance ball 7, described worm screw is adjusted plate 8 outsides and is provided with adjustment jackscrew 9, described adjustment jackscrew 9 is adjusted plate 8 by housing 1 by worm screw and is compressed, a deep groove ball bearing 2 is respectively equipped with in two shaft head positions of described worm gear 4, the outer ring of one of them deep groove ball bearing 2 and housing 1 are combined together, the outer ring of another deep groove ball bearing 2 and gland 20 are combined together, the inner ring of described deep groove ball bearing 2 coordinates with the spindle nose of worm gear 4.
On 4 two spindle noses of described worm gear, an oil sealing 3 is respectively housed.
As shown in Figure 1, a deep groove ball bearing 2 is respectively equipped with in two shaft head positions of worm gear 4, the outer ring of one of them deep groove ball bearing 2 and housing 1 are combined together, the outer ring of another deep groove ball bearing 2 and gland 20 are combined together, the inner ring of deep groove ball bearing 2 coordinates with the spindle nose of worm gear 4, eliminates the axial movement space of worm gear 4 by compressing gland 20.The worm screw of worm screw box 6 and the right and left is adjusted between plate 8 advance ball 7, is beneficial to the adjustment of centre distance.Adjust jackscrew 9, by housing 1, worm screw is adjusted to plate 8 compressions, guarantee the correctness of worm screw box 6 left and right directions positions.Brute spring 10 and spring seat 11 are for guaranteeing worm gear 4 and worm screw 5 engagement tightly.Spring adjusts power jackscrew 12 for adjusting the pre-pressing force of brute spring 10, guarantees worm gear 4 and worm screw 5 engagement tightly.On 4 two spindle noses of worm gear, an oil sealing 3 is respectively housed, prevents that the lubricant oil in housing 1 from leaking outside.
As shown in Figure 2, worm screw 5 is contained in worm screw box 6 by two tapered roller bearings 16, compresses the axial movement space of lower end cap 14 and worm screw box compression upper end cap 18 compression elimination worm screws 5 by the worm screw box at worm screw box 6 two ends.5 one of worm screws pass from worm screw box 6, and at axle head, flexible coupling 19 are housed, by flexible coupling 19 input powers, flexible coupling 19 can compensate in transmission process compared with small eccentricity.Worm screw box upper end cap 17 has advance ball 7 and worm screw box compression lower end cap 14 to be connected with worm screw box compression upper end cap 18 with worm screw box lower end cap 13 outsides, and fixedly worm screw box 6 left and right directions, are beneficial to the automatic adjustment in gap.Worm screw box compresses lower end cap 14 and worm screw box compression upper end cap 18 is connected on housing 1 by screw 15, and worm screw box compresses lower end cap 14 and worm screw box compresses the axial float that can eliminate worm screw box 6 after upper end cap 18 compresses.Brute spring 10 and spring seat 11, for guaranteeing worm gear 4 and worm screw 5 engagement tightly, are eliminated the gap between worm gear 4 and worm screw 5 automatically, realize the automatic adjustment in gap.
The utility model is not limited to above-mentioned mode of execution, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technological scheme, within all falling into protection domain of the present utility model.
The technology that the utility model is not described in detail, shape, structure are partly known technology.
Claims (2)
1. an automatic anti-backlash worm wheel worm gearing, its structure is mainly by worm screw (5), worm gear (4), housing (1), gland (20), bearing, worm screw box (6), advance ball (7) forms, it is characterized in that, described worm screw (5) is contained in a worm screw box (6) that can radially slide along worm gear (4) by two tapered roller bearings (16), (5) one of described worm screws pass from worm screw box (6), and at axle head, flexible coupling (19) is housed, described worm screw box (6) two ends are respectively equipped with worm screw box and compress lower end cap (14) and worm screw box compression upper end cap (18), described worm screw box compresses lower end cap (14) and worm screw box compression upper end cap (18) is connected on housing (1) by screw (15), described worm screw box upper end cap (17) compresses lower end cap (14) by advance ball (7) and worm screw box respectively with worm screw box lower end cap (13) outside and is connected with worm screw box compression upper end cap (18), described worm screw box (6) has been provided with four pre-pressing brute springs (10) at worm screw (5) and the back side of worm gear (4) engagement, described brute spring (10) is fixed on housing (1) by spring seat (11), on described brute spring (10), be connected with spring and adjust power jackscrew (12), the worm screw of described worm screw box (6) and the right and left is adjusted between plate (8) and is equipped with advance ball (7), described worm screw is adjusted plate (8) outside and is provided with adjustment jackscrew (9), described adjustment jackscrew (9) is adjusted plate (8) by housing (1) by worm screw and is compressed, a deep groove ball bearing (2) is respectively equipped with in two shaft head positions of described worm gear (4), the outer ring of one of them deep groove ball bearing (2) and housing (1) are combined together, the outer ring of another deep groove ball bearing (2) and gland (20) are combined together, the inner ring of described deep groove ball bearing (2) coordinates with the spindle nose of worm gear (4).
2. a kind of automatic anti-backlash worm wheel worm gearing according to claim 1, is characterized in that, on (4) two spindle noses of described worm gear, an oil sealing (3) is respectively housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394558.3U CN203395102U (en) | 2013-07-04 | 2013-07-04 | Worm and gear transmission mechanism capable of automatically eliminating clearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320394558.3U CN203395102U (en) | 2013-07-04 | 2013-07-04 | Worm and gear transmission mechanism capable of automatically eliminating clearance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203395102U true CN203395102U (en) | 2014-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320394558.3U Expired - Fee Related CN203395102U (en) | 2013-07-04 | 2013-07-04 | Worm and gear transmission mechanism capable of automatically eliminating clearance |
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| CN (1) | CN203395102U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104913006A (en) * | 2015-05-12 | 2015-09-16 | 江阴尚爵机械制造有限公司 | Novel high-precision slewing support |
| CN105782422A (en) * | 2014-12-26 | 2016-07-20 | 中日龙(襄阳)机电技术开发有限公司 | Gear engagement gap eliminating device |
| CN106438971A (en) * | 2016-10-20 | 2017-02-22 | 中国科学院光电技术研究所 | Automatic clearance mechanism that disappears of worm gear |
| WO2017211175A1 (en) * | 2016-06-06 | 2017-12-14 | 舍弗勒技术股份两合公司 | Worm gear mechanism |
| CN109322979A (en) * | 2018-11-05 | 2019-02-12 | 兰州万里航空机电有限责任公司 | For eliminating the device in Worm Wheel System gap |
| CN110219945A (en) * | 2019-06-26 | 2019-09-10 | 南通斯密特森光电科技有限公司 | A kind of turbine and worm |
| CN116025669A (en) * | 2023-03-30 | 2023-04-28 | 济南汉江光电科技有限公司 | Flexible-support worm and gear mechanism |
-
2013
- 2013-07-04 CN CN201320394558.3U patent/CN203395102U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105782422A (en) * | 2014-12-26 | 2016-07-20 | 中日龙(襄阳)机电技术开发有限公司 | Gear engagement gap eliminating device |
| CN104913006A (en) * | 2015-05-12 | 2015-09-16 | 江阴尚爵机械制造有限公司 | Novel high-precision slewing support |
| WO2017211175A1 (en) * | 2016-06-06 | 2017-12-14 | 舍弗勒技术股份两合公司 | Worm gear mechanism |
| CN106438971A (en) * | 2016-10-20 | 2017-02-22 | 中国科学院光电技术研究所 | Automatic clearance mechanism that disappears of worm gear |
| CN109322979A (en) * | 2018-11-05 | 2019-02-12 | 兰州万里航空机电有限责任公司 | For eliminating the device in Worm Wheel System gap |
| CN109322979B (en) * | 2018-11-05 | 2021-08-20 | 兰州万里航空机电有限责任公司 | Device for eliminating transmission clearance of worm and gear |
| CN110219945A (en) * | 2019-06-26 | 2019-09-10 | 南通斯密特森光电科技有限公司 | A kind of turbine and worm |
| CN116025669A (en) * | 2023-03-30 | 2023-04-28 | 济南汉江光电科技有限公司 | Flexible-support worm and gear mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20150704 |
|
| EXPY | Termination of patent right or utility model |