CN102788134A - Device for eliminating meshing back lash of worm gear and worm and increasing output torque - Google Patents
Device for eliminating meshing back lash of worm gear and worm and increasing output torque Download PDFInfo
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- CN102788134A CN102788134A CN2012103157867A CN201210315786A CN102788134A CN 102788134 A CN102788134 A CN 102788134A CN 2012103157867 A CN2012103157867 A CN 2012103157867A CN 201210315786 A CN201210315786 A CN 201210315786A CN 102788134 A CN102788134 A CN 102788134A
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- worm gear
- worm
- arm
- gear sheet
- sheet
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
- F16H55/18—Special devices for taking up backlash
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
- F16H55/24—Special devices for taking up backlash
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a device for eliminating meshing back lash of a worm gear and a worm and increasing output torque. The device comprises a main worm gear sheet, an auxiliary worm gear sheet and a torque arm structure and is characterized in that the torque arm structure comprises a fulcrum, a dynamic arm and a resisting arm, wherein the fulcrum is arranged on the main worm sheet, the resisting arm is connected onto the auxiliary worm sheet, and a boss is arranged at the end of the resisting arm and inserted into a key groove of the auxiliary worm sheet. The length of the dynamic arm is larger than that of the resisting arm. When small external force is exerted at the end of the dynamic arm, large force can be generated at the end of the resisting arm, the boss at the end of the resisting arm pushes the auxiliary worm sheet in the key groove, accordingly, the main worm sheet and the auxiliary worm sheet generate relative rotation, and the torque output by the worm is increased. The device for eliminating meshing back lash of the worm gear and the worm and increasing output torque conveniently eliminates the meshing back lash of the worm gear and the worm, increases the output torque, improves rigidity of the system and is simple in structure and convenient to adjust.
Description
Technical field
The invention belongs to the mechanical transmission class, specifically is a kind of device of eliminating the worm and gear back lash and increasing output torque.
Background technique
Worm and gear is the mechanical part that arrives commonly used in the mechanical transmission, can realize big speed ratio, and the characteristic of self-locking is arranged; But in precision drive; Worm geared backlash is a very serious problem, and it has caused the return difference of system, even influences the stability of control system.
People adopt several different methods to reduce backlash, and for example method 1, use two worm gears and usefulness, and a worm gear is close to the left side of worm tooth, and another then is close to the right side of worm tooth, and is as shown in Figure 1.The size that two worm gears are clamped the power of worm tooth confirmed by an extension spring, because extension spring pulls to two worm gears together all the time, so backlash just is always zero.But the shortcoming of this method is: when moment that worm gear transmitted during greater than the pulling force of spring, spring needs bigger stretching, extension produce bigger pulling force, and this moment, backlash just produced.
Another kind method is seen Fig. 2, is the worm screw of having adopted two helical pitches.Backlash can be eliminated in the worm and worm wheel engagement position of the two helical pitches of adjustment, fixes this position and can keep not having backlash operation a period of time, but along with the increase of mechanical wear, adjust the axial position of a worm screw after a period of time again again again.Needing repeatedly to adjust the worm screw position repeatedly is again a shortcoming.
Also having a method 3, is to adopt two worm gear sheets to add cam pin, sees patent No. ZL200820217119.4, and its shortcoming also is need adjust once at a distance from a period of time.
Summary of the invention
In view of this; The objective of the invention is to overcome the little problem of driving torque described in the worm and gear back lash and method 1 in the mechanical transmission; Overcome the deficiency of above three kinds of technology, a kind of device of eliminating the worm and gear back lash and increasing output torque is provided.
Technological scheme of the present invention is following:
A kind of device of eliminating the worm and gear back lash and increasing output torque comprises main worm gear sheet, secondary worm gear sheet, arm structure, and it is characterized in that: main worm gear sheet and secondary worm gear sheet are provided with one heart, so that main worm gear sheet, secondary worm gear sheet can relatively rotate; Arm structure comprises a fulcrum; One power arm and a resistance arm, said fulcrum are located on the main worm gear sheet, and resistance arm is connected on the secondary worm gear sheet; Said power arm length is greater than said resistance arm length; Power arm is applied very little power, will produce very big power, thereby can produce very big output torque around fulcrum at the resistance arm end.One end of said resistance arm comprises a boss; Said secondary worm gear sheet is provided with a long keyway on the radial direction; Said boss is inserted in the said keyway; On the main worm gear sheet corresponding with keyway, be provided with a through hole greater than keyway, so that main worm gear sheet and secondary worm gear sheet be when relatively rotating, keyway is exposed to this through hole all the time.
Further, the force side of said power arm connects a spring, and the other end of spring is connected in main worm gear sheet or secondary worm gear sheet.The force side of the power arm elastic force through spring is applied external force, impel the boss on the resistance arm in keyway, to promote secondary worm gear sheet, major and minor worm gear sheet is produced relative rotation, and then eliminate the gap.
Further, can also be provided with bolt pedestal or nut on said main worm gear sheet or the secondary worm gear sheet, its corresponding bolt withstands the force side of power arm.The position of adjustment bolt on pedestal or nut; So that there is certain roof pressure power the power arm force side; Then it is tightened and be fixed on pedestal or the nut, the roof pressure through bolt is that power arm applies external force, impels the boss on the resistance arm in keyway, to promote secondary worm gear sheet; Major and minor worm gear sheet is produced relative rotation, and then eliminate the gap.
Further, said power arm material can be processed by latten or spring steel plate elastomeric material, and the force side of power arm is fixed on main worm gear sheet or the secondary worm gear sheet with certain prestressing force.Elastic deformation force by the power arm material provides to power arm end externally applied forces; After adjusting about power arm; Its end is fixed on main worm gear sheet or the secondary worm gear sheet, is relied on the elasticity predeformation of power arm material that external force is provided, impel the boss on the resistance arm in keyway, to promote secondary worm gear; Major and minor worm gear sheet is produced relative rotation, and then eliminate the gap.
Major and minor worm gear sheet among the present invention can exchange appellation and not influence enforcement.
The invention has the beneficial effects as follows: the present invention adopts arm structure, and the force side of power arm is applied external force, impels the boss on the resistance arm in keyway, to promote secondary worm gear sheet; Major and minor worm gear sheet is relatively rotated; And then eliminate the worm and gear back lash, simultaneously because power arm length greater than resistance arm length, has increased output torque; Thereby improved the rigidity of transmission accuracy and system's transmission, can be suitable for precision drive and heavily loaded power transmission field.Simple in structure, easy to adjust.
Description of drawings
Fig. 1 is that two worm gears of existing technology are eliminated backlash device schematic representation.
Fig. 2 is that two helical pitch worm screws of existing technology are eliminated backlash device schematic representation.
Fig. 3 is the structural representation of the preferred embodiment of the present invention.
Fig. 4 is that the A of Fig. 3 is to sectional view.
Fig. 5 is that the B of Fig. 3 is to partial sectional view.
Fig. 6 is the local enlarged diagram of the embodiment of the invention 1.
Fig. 7 is the local enlarged diagram of the embodiment of the invention 2.
Fig. 8 is the local enlarged diagram of the embodiment of the invention 3.
Fig. 9 is the another kind of form schematic representation of arm structure.
Embodiment:
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Like Fig. 3,4, shown in 5; A kind of device of eliminating the worm and gear back lash and increasing output torque; Comprise main worm gear sheet 1, secondary worm gear sheet 2 and an arm structure; Main worm gear sheet 1 and secondary worm gear sheet 2 are installed togather with concentric, on the ladder circle of main worm gear sheet, the back-up ring 3 that prevents axial float are installed; Arm structure comprises power arm 8, and resistance arm 9 and fulcrum 4, fulcrum 4 are located on the main worm gear sheet 1; Arm structure can rotate around fulcrum 4, and the length of power arm 8 is greater than the length of resistance arm 9, and resistance arm 9 one ends comprise a boss 5; On secondary worm gear sheet 2, be provided with a long keyway 6 on the radial direction; Boss 5 is inserted in the keyways 6, on the main worm gear sheet 1 corresponding, be provided with a through hole 7 greater than keyway, so that main worm gear sheet 1 and secondary worm gear sheet 2 can relatively rotate with keyway 6.Power arm 8 force sides also are connected with the device 10 that applies external force, and power arm 8 is applied external force.
Like Fig. 3, shown in 6; A kind of device of eliminating the worm and gear back lash and increasing output torque; Comprise main worm gear sheet 1, secondary worm gear sheet 2, arm structure (comprising power arm 8 and resistance arm 9 and fulcrum 4), for power arm 8 provides the device 10 of external force, it is characterized in that: external force generator 10 is a spring 11, spring 11 1 ends are fixed on the force side of power arm 8; The other end is fixed on main worm gear sheet 1 or the secondary worm gear sheet 2; The fulcrum 4 of arm structure and can be around fulcrum 4 motion on main worm gear sheet 1, and the boss 5 of resistance arm 9 one ends is inserted in the keyway 6 of secondary worm gear sheet 2.
The elastic force of present embodiment through spring 11 applies external force to the force side of power arm 8, makes the boss 5 of resistance arm 9 ends in keyway 6, promote secondary worm gear sheet 2, thereby main worm gear sheet 1 is produced relative rotation with secondary worm gear sheet 2, eliminates the back lash.Because power arm 8 length greater than resistance arm 9, apply very little power to power arm 8 and just can produce very big power at resistance arm 9 ends, thereby exportable very big moment.
Like Fig. 3, shown in 7; A kind of device of eliminating the worm and gear back lash and increasing output torque; Comprise main worm gear sheet 1, secondary worm gear sheet 2, arm structure (comprising power arm 8 and resistance arm 9 and fulcrum 4), for power arm 8 provides the device 10 of external force, it is characterized in that: external force generator 10 also can be bolt 12, and the pedestal 14 or the nut of bolt 12 is fixed on main worm gear sheet 1 or the secondary worm gear sheet 2; Adjustment bolt 12 makes its bottom withstand the force side of power arm 8; The fulcrum 4 of arm structure and can be around fulcrum 4 motion on main worm gear sheet 1, and the boss 5 of resistance arm 9 one ends is inserted in the keyway 6 of secondary worm gear sheet 2.
The roof pressure of present embodiment through bolt 12 applies external force to the force side of power arm 8, and resistance arm 9 is rotated around fulcrum 4, thereby main worm gear sheet 1 is produced relative rotation with secondary worm gear sheet 2, eliminates the back lash.Because the length of power arm 8 greater than the length of resistance arm 9, applies very little power to power arm 8 and just can produce very big power at resistance arm 9 ends, thereby the very big moment of output.
Embodiment 3
Like Fig. 3, shown in 8; A kind of device of eliminating the worm and gear back lash and increasing output torque; Comprise main worm gear sheet 1, secondary worm gear sheet 2, arm structure (comprising power arm 8 and resistance arm 9 and fulcrum 4), for power arm provides the device 10 of external force, it is characterized in that: external force generator 10 also can be fixed on main worm gear sheet 1 or the secondary worm gear sheet 2 with the force side of screw 13 with power arm 8 for power arm 8 self; The fulcrum 4 of arm structure is on main worm gear sheet 1; And can be around fulcrum 4 motions, resistance arm 9 one ends comprise a boss 5, are inserted in the keyway 6 of secondary worm gear sheet 2.
Present embodiment through to adjust to about power arm 8 be fit to the position after; Be fixed on main worm gear sheet 1 or the secondary worm gear sheet 2 with the force side of screw 13 power arm 8; The elasticity predeformation power that relies on power arm 8 self material applies external force to the force side of power arm 8; Resistance arm 9 is rotated around fulcrum 4, thereby main worm gear sheet 1 is produced relative rotation with secondary worm gear sheet 2, eliminate the back lash.Because power arm 8 length greater than the length of resistance arm 9, apply very little power to power arm and just can produce very big power at resistance arm 9 ends, thereby the very big moment of output.
Certainly, the shape of power arm also is not limited to three kinds of structures of above narration, also can be other structures; As shown in Figure 9, the power arm shape also can be an arc, and main worm gear sheet and secondary worm gear sheet are relatively rotated; Eliminate the back lash, all can reach goal of the invention.
Explanation is at last; Above embodiment is only unrestricted in order to technological scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention; And not breaking away from the aim and the scope of technological scheme of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (8)
1. device of eliminating the worm and gear back lash and increasing output torque; Comprise a main worm gear sheet, a secondary worm gear sheet and an arm structure; It is characterized in that: said main worm gear sheet and said secondary worm gear sheet are provided with one heart, so that main worm gear sheet, secondary worm gear sheet can relatively rotate; Said arm structure comprises a fulcrum, and a power arm and a resistance arm, said fulcrum are located on the said main worm gear sheet, and said resistance arm is connected on the said secondary worm gear sheet.
2. the device of elimination worm and gear back lash according to claim 1 and increase output torque, it is characterized in that: said power arm length is greater than said resistance arm length.
3. the device of elimination worm and gear back lash according to claim 1 and increase output torque, it is characterized in that: the force side of said power arm connects a spring, and the other end of spring is connected in said main worm gear sheet or said secondary worm gear sheet.
4. the device of elimination worm and gear back lash according to claim 1 and increase output torque, it is characterized in that: main worm gear sheet or secondary worm gear sheet are provided with bolt pedestal or nut, and its corresponding bolt is brought in the application of force through the application of force of withstanding power arm.
5. the device of elimination worm and gear back lash according to claim 1 and increase output torque; It is characterized in that: said power arm material is processed by latten or spring steel plate elastomeric material, and the force side of power arm is fixed on main worm gear sheet or the secondary worm gear sheet with certain prestressing force.
6. the device of elimination worm and gear back lash according to claim 1 and increase output torque, it is characterized in that: an end of said resistance arm comprises a boss.
7. the device of elimination worm and gear back lash according to claim 6 and increase output torque, it is characterized in that: said secondary worm gear sheet is provided with the long keyway on the radius direction, and said boss is inserted in the said keyway.
8. the device of elimination worm and gear back lash according to claim 7 and increase output torque; It is characterized in that: on the main worm gear sheet corresponding, be provided with a through hole greater than said keyway with said keyway; So that main worm gear sheet and secondary worm gear sheet be when relatively rotating, said keyway is exposed to said through hole.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103157867A CN102788134A (en) | 2012-08-31 | 2012-08-31 | Device for eliminating meshing back lash of worm gear and worm and increasing output torque |
| PCT/CN2013/074422 WO2014032433A1 (en) | 2012-08-31 | 2013-04-19 | Apparatus for eliminating meshing gap between worm gear and worm and increasing output torque |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103157867A CN102788134A (en) | 2012-08-31 | 2012-08-31 | Device for eliminating meshing back lash of worm gear and worm and increasing output torque |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102788134A true CN102788134A (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103157867A Pending CN102788134A (en) | 2012-08-31 | 2012-08-31 | Device for eliminating meshing back lash of worm gear and worm and increasing output torque |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102788134A (en) |
| WO (1) | WO2014032433A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943868A (en) * | 2012-12-14 | 2013-02-27 | 南京中科天文仪器有限公司 | Small-rotation-angle transmission device with gap eliminating mechanism |
| WO2014032433A1 (en) * | 2012-08-31 | 2014-03-06 | Lu Qixiang | Apparatus for eliminating meshing gap between worm gear and worm and increasing output torque |
| CN109854365A (en) * | 2018-12-29 | 2019-06-07 | 昆明云内动力股份有限公司 | A kind of noise-reduction type engine gear transmission system |
| WO2023043664A1 (en) * | 2021-09-15 | 2023-03-23 | Milwaukee Electric Tool Corporation | Maximum power tool startup torque |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838129B (en) * | 2017-04-18 | 2023-09-08 | 上海同驭汽车科技有限公司 | Worm and gear with center distance adjustment and clearance elimination, brake and steering system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB633971A (en) * | 1947-09-12 | 1949-12-30 | Frederick Errington | Improvements in or relating to spur gearing |
| US4781073A (en) * | 1987-06-24 | 1988-11-01 | The United States Of America As Represented By The Secretary Of The Army | Adjustable antibacklash gear system |
| CN101007544A (en) * | 2006-01-27 | 2007-08-01 | 株式会社万都 | Steering apparatus |
| CN201057245Y (en) * | 2007-05-08 | 2008-05-07 | 郭聿耘 | Automatic clearance-eliminating worm-gear drive pair |
| CN201162804Y (en) * | 2008-03-03 | 2008-12-10 | 李旭才 | Worm gear apparatus capable of improving transmission accuracy |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2823688Y (en) * | 2005-08-18 | 2006-10-04 | 无锡开源机床集团有限公司 | Split worm for roll grinder |
| CN201293086Y (en) * | 2008-11-27 | 2009-08-19 | 江苏高精机电装备有限公司 | Device for eliminating worm gear worm backlash |
| CN102788134A (en) * | 2012-08-31 | 2012-11-21 | 南京启湘机电科技有限公司 | Device for eliminating meshing back lash of worm gear and worm and increasing output torque |
-
2012
- 2012-08-31 CN CN2012103157867A patent/CN102788134A/en active Pending
-
2013
- 2013-04-19 WO PCT/CN2013/074422 patent/WO2014032433A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB633971A (en) * | 1947-09-12 | 1949-12-30 | Frederick Errington | Improvements in or relating to spur gearing |
| US4781073A (en) * | 1987-06-24 | 1988-11-01 | The United States Of America As Represented By The Secretary Of The Army | Adjustable antibacklash gear system |
| CN101007544A (en) * | 2006-01-27 | 2007-08-01 | 株式会社万都 | Steering apparatus |
| CN201057245Y (en) * | 2007-05-08 | 2008-05-07 | 郭聿耘 | Automatic clearance-eliminating worm-gear drive pair |
| CN201162804Y (en) * | 2008-03-03 | 2008-12-10 | 李旭才 | Worm gear apparatus capable of improving transmission accuracy |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014032433A1 (en) * | 2012-08-31 | 2014-03-06 | Lu Qixiang | Apparatus for eliminating meshing gap between worm gear and worm and increasing output torque |
| CN102943868A (en) * | 2012-12-14 | 2013-02-27 | 南京中科天文仪器有限公司 | Small-rotation-angle transmission device with gap eliminating mechanism |
| CN102943868B (en) * | 2012-12-14 | 2016-04-13 | 南京中科天文仪器有限公司 | For the little rotation angle transmission device with anti-backlash mechanism of astronomical machinery |
| CN109854365A (en) * | 2018-12-29 | 2019-06-07 | 昆明云内动力股份有限公司 | A kind of noise-reduction type engine gear transmission system |
| WO2023043664A1 (en) * | 2021-09-15 | 2023-03-23 | Milwaukee Electric Tool Corporation | Maximum power tool startup torque |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014032433A1 (en) | 2014-03-06 |
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| PB01 | Publication | ||
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| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121121 |