CN103089969A - Double-way transmission gear without gear backlash - Google Patents
Double-way transmission gear without gear backlash Download PDFInfo
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- CN103089969A CN103089969A CN2013100214557A CN201310021455A CN103089969A CN 103089969 A CN103089969 A CN 103089969A CN 2013100214557 A CN2013100214557 A CN 2013100214557A CN 201310021455 A CN201310021455 A CN 201310021455A CN 103089969 A CN103089969 A CN 103089969A
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- fixed gear
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Abstract
The invention discloses a double-way transmission gear without gear backlash. The double-way transmission gear comprises a fixed gear 1, a movable gear 2, an outer wedge-shaped clamping device 3, an inner wedge-shaped clamping device 4, a bolt 6 and a nut 7. The double-way transmission gear has the advantages that the gear is divided into two; when the gear rotates forward, the fixed gear 1 is meshed with a gear to be transmitted in gapless mode; and when the gear rotates reversely, the movable gear 2 with a free rotation angle is adjusted to control an included angle formed by the fixed gear 1 and the movable gear 2 and enable the reversely rotating gear to be meshed with the gear to be transmitted in gapless mode, the outer wedge-shaped clamping device 3 and the inner wedge-shaped clamping device 4 are utilized to enable the fixed gear 1 and the movable gear 2 to be clamped together and fix the position between the fixed gear 1 and the movable gear 2, and friction moment between an outer wall of the fixed gear 1 and an inner wall of the movable gear 2 is utilized to enable the gear to be free of the gear backlash in the forward-rotating and reverse-rotating process. The double-way transmission gear without the gear backlash is simple in structure, convenient to process and few in additional parts, reduces vibration and noise in the transmission process and improves transmission accuracy.
Description
Technical field
The present invention relates to a kind of gear of eliminating backlash, especially for the gear of the accuracy-control system that requires Bidirectional driving.
Background technique
Document " application number is 02284069.9 Chinese utility model patent " discloses a kind of compensation mechanism of eliminating backlash, and this mechanism mainly is made of cover plate, sliding pin, spring and two chutes being positioned on Double-gear; Such mechanism structure is complicated, and its bearing capacity is determined by the pulling force of extension spring, the moment of torsion that the pulling force of extension spring produces must be greater than the Maximum Torque of drive system, like this, no matter be unloaded or fully loaded, this contact stress to the contact pattern of gear always is in the maximum value state, will affect like this contact fatigue life of gear.
Summary of the invention
For the deficiency of the Bidirectional driving gear that overcomes existing auto-compensation backlash, the invention provides a kind of simple in structure, in the situation that zero load or load all do not affect the contact fatigue life of gear and eliminate the Bidirectional driving gear of backlash.By gear is divided into two in the middle of the facewidth, the gear of two and half facewidth is passed through clamp device, reconnect together, by controlling the stagger angle of two and half gear tooths, reach in gear forward and backward process all the purpose without backlash.
The technical solution adopted for the present invention to solve the technical problems:
A kind of Bidirectional driving gear of eliminating backlash comprises fixed gear 1, moving gear 2, outer wedge-shaped clamping device 3, interior wedge-shaped clamping device 4, bolt 6 and nut 7; Described fixed gear connects by key and is fixed together with transmission shaft, and fixed gear 1 one sides are with a circle wedge shape positioning groove 8, and at its homonymy with the penetrating body of boss; Moving gear 2 one sides are with a circle wedge shape positioning boss 9, and opposite side is with the penetrating body of boss; Described fixed gear 1 and moving gear 2 have identical gear parameter; Wedge shape positioning boss 9 axial lengths of described moving gear 2 are greater than wedge shape positioning groove 8 axial lengths of fixed gear 1; Described moving gear 2 is sleeved on fixed gear 1, make the wedge shape positioning groove 8 on fixed gear 1 coordinate with wedge shape positioning boss 9 on moving gear 2, the wedge shape positioning boss 9 that is about to moving gear 2 is installed in the wedge shape positioning groove 8 of fixed gear 1, and the outer wall of the penetrating body of boss of fixed gear 1 coordinates with the penetrating body inwall of moving gear boss; Because wedge shape positioning boss 9 axially slightly is longer than wedge shape positioning groove 8, can guarantee to have certain axial clearance between fixed gear 1 and moving gear 2, prevent in the engagement driving process, because causing fixed gear 1, moving gear 2, meshes simultaneously gear tooth deformation; Described fixed gear 1 guarantees guarantee when reversing and treat the driving gear tight mesh with treating driving gear tight mesh, described moving gear 2 when forward; Outer wedge-shaped clamping device 3 coordinates with interior wedge-shaped clamping device 4, be loaded on the penetrating external wall of boss of moving gear 2, by bolt 6 and nut 7, outer wedge-shaped clamping device 3 and interior wedge-shaped clamping device 4 are compressed, impacting force produces the penetrating body of boss and the fixed gear 1 penetrating body radial compaction of boss that radial component makes moving gear 2, frictional force between the outer wall by the fixed gear 1 penetrating body of boss and the inwall of the moving gear 2 penetrating bodies of boss makes fixed gear 1 drive moving gear 2 reversing drive.
The invention has the beneficial effects as follows: the invention has the beneficial effects as follows: gear is divided into two, during forward, makes fixed gear and treat tight mesh between driving gear; During counter-rotating, by adjusting the moving gear that can rotate freely angle, control the angle of itself and fixed gear, make its when counter-rotating with treat the driving gear tight mesh, and utilize two wedge-shaped clamping devices, fixed gear and moving gear are clamped together, position between fixing both, the friction torque that provides between the inwall of fixed gear outer wall and moving gear is provided, make gear in the forward and backward process all without backlash, this gear structure is simple, be convenient to processing, add-on parts is few, reduce the vibration and noise in the transmission process, improved transmission accuracy.
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
Description of drawings
Fig. 1 eliminates the schematic three dimensional views of the Bidirectional driving gear of backlash in embodiment.
Fig. 2 is the schematic three dimensional views of fixed gear in embodiment.
Fig. 3 is the schematic three dimensional views of moving gear in embodiment.
Fig. 4 is embodiment's schematic three dimensional views of wedge-shaped clamping device at home and abroad.
Fig. 5 is the schematic three dimensional views of interior wedge-shaped clamping device in embodiment.
Fig. 6 is that embodiment's middle gear is along the two-dimentional sectional view of axis.
In figure, the 1-fixed gear; The 2-moving gear; The outer wedge-shaped clamping device of 3-; Wedge-shaped clamping device in 4-; The 5-rectangular recess; The 6-bolt; The 7-nut; 8-wedge shape positioning groove; 9-wedge shape positioning boss; The 10-bolt hole.
Embodiment
With reference to Fig. 1 ~ 6, the Bidirectional driving gear of eliminating backlash in the present embodiment comprises fixed gear 1, moving gear 2, outer wedge-shaped clamping device 3, interior wedge-shaped clamping device 4, bolt 6 and nut 7; Described fixed gear connects by key and is fixed together with transmission shaft, and fixed gear 1 one sides are with a circle wedge shape positioning groove 8, and at its homonymy with the penetrating body of boss, and uniform four rectangular recess 5 of the outer wall of the penetrating body of boss; Moving gear 2 one sides are with a circle wedge shape positioning boss 9, and opposite side is with the penetrating body of boss; Described fixed gear 1 and moving gear 2 have identical gear parameter; Wedge shape positioning boss 9 axial lengths of described moving gear 2 are greater than wedge shape positioning groove 8 axial lengths of fixed gear 1; Described moving gear 2 is sleeved on fixed gear 1, make the wedge shape positioning groove 8 on fixed gear 1 coordinate with wedge shape positioning boss 9 on moving gear 2, the wedge shape positioning boss 9 that is about to moving gear 2 is installed in the wedge shape positioning groove 8 of fixed gear 1, can realize axially locating, can control again two distances between gear, the outer wall of the penetrating body of boss of fixed gear 1 coordinates with the penetrating body inwall of the boss of moving gear 2; Because wedge shape positioning boss 9 axially slightly is longer than wedge shape positioning groove 8, can guarantee to have certain axial clearance between fixed gear 1 and moving gear 2, prevent in the engagement driving process, because causing fixed gear 1, moving gear 2, meshes simultaneously gear tooth deformation; Described fixed gear 1 guarantees guarantee when reversing and treat the driving gear tight mesh with treating driving gear tight mesh, described moving gear 2 when forward; Outer wedge-shaped clamping device 3 coordinates with interior wedge-shaped clamping device 4, be loaded on the penetrating external wall of boss of moving gear 2, by bolt 6 and nut 7, outer wedge-shaped clamping device 3 and interior wedge-shaped clamping device 4 are compressed, impacting force produces the penetrating body of boss and the fixed gear 1 penetrating body radial compaction of boss that radial component makes moving gear 2.
Installation process: the wedge shape positioning boss 9 of moving gear 2 is installed in the wedge shape positioning groove 8 of fixed gear 1; Guarantee fixed gear 1 when forward with treat the driving gear tight mesh; According in esse counter-rotating backlash, adjust moving gear 2 with respect to the rotation angle of fixed gear 1, make moving gear 2 when counter-rotating with treat the driving gear tight mesh, when adjusting rotation angle, utilize four rectangular recess 5 on the moving gear 2 penetrating bodies of boss, using spanner to control respectively distribution angle is two rectangular recess 5 of 180 °, along the same circumference direction application of force simultaneously; Then on the penetrating body of boss that outer wedge-shaped clamping device 3 and interior wedge-shaped clamping device 4 is arranged on moving gear 2, by coordinating of outer wedge-shaped clamping device 3 and interior wedge-shaped clamping device 4, utilize bolt 6 make outer wedge-shaped clamping device 3 and interior wedge-shaped clamping device 4 tightly fixing together, and then fixed gear 1 and the penetrating body of boss of moving gear 2 tightly are combined together.The degree of tightening of bolt 6 determines the clamping degree of Wedge device, and then the penetrating body of the boss that makes fixed gear 1 and the moving gear 2 penetrating bodies of boss, fastening connects together, in the actual transmission process, the size of moving gear 2 driving torques, can determine the degree of tightening of bolt, forward and backward can smooth running in without the sideshake situation to utilize frictional force between the penetrating body of boss to reach gear.
Working procedure: when forward, fixed gear 1 drive that is arranged on transmission shaft treats that the driving gear rotation realizes transmission; During counter-rotating, fixed gear 1 drives moving gear 2 counter-rotatings by the frictional force between the penetrating external wall of its boss and the moving gear 2 penetrating body inwalls of boss, and moving gear 2 drives treats that driving gear rotates to realize transmission; Guaranteed simultaneously owing to installing fixed gear 1 when forward with treat the driving gear tight mesh, and moving gear 2 when counter-rotating with treat the driving gear tight mesh, therefore, this eliminates the Bidirectional driving gear of backlash, forward and backward is all without sideshake.In transmission process, no matter be forward or counter-rotating, all only have half gear transmitting motion, the bearing capacity of the gear teeth is than reducing a lot with whole gear, therefore this type gear is unsuitable for being applied in the transmission system of heavy duty, but be applicable to require in control system that gear Bidirectional driving and transmission accuracy have relatively high expectations.This eliminates the Bidirectional driving gear of backlash, processes easy for installationly, and axially locating is accurate, and transmission is accurate, can be used in the demanding control system of transmission accuracy.
Claims (1)
1. a Bidirectional driving gear of eliminating backlash comprises fixed gear (1), moving gear (2), outer wedge-shaped clamping device (3), interior wedge-shaped clamping device (4), bolt (6) and nut (7); Described fixed gear connects by key and is fixed together with transmission shaft, and fixed gear (1) one side is with a circle wedge shape positioning groove (8), and at its homonymy with the penetrating body of boss; Moving gear (2) one sides are with a circle wedge shape positioning boss (9), and opposite side is with the penetrating body of boss; Described fixed gear (1) and moving gear (2) have identical gear parameter; Wedge shape positioning boss (9) axial length of described moving gear (2) is greater than wedge shape positioning groove (8) axial length of fixed gear (1); Described moving gear (2) is sleeved on fixed gear (1), make on gear (1) wedge shape positioning groove (8) with coordinate with wedge shape positioning boss (9) on moving gear (2), the wedge shape positioning boss (9) that is about to moving gear (2) is installed in the wedge shape positioning groove (8) of fixed gear (1), and the outer wall of the penetrating body of boss of fixed gear (1) coordinates with the penetrating body inwall of moving gear (2) boss; Because wedge shape positioning boss (9) axially slightly is longer than wedge shape positioning groove (8), can guarantee to have certain axial clearance between fixed gear (1) and moving gear (2), prevent in the engagement driving process, mesh simultaneously because gear tooth deformation causes fixed gear (1), moving gear (2); Described fixed gear (1) guarantees guarantee when reversing and treat the driving gear tight mesh with treating driving gear tight mesh, described moving gear (2) when forward; Outer wedge-shaped clamping device (3) coordinates with interior wedge-shaped clamping device (4), be loaded on the penetrating external wall of boss of moving gear (2), by bolt (6) and nut (7), outer wedge-shaped clamping device (3) and interior wedge-shaped clamping device (4) are compressed, impacting force produces the penetrating body of boss and the penetrating body radial compaction of fixed gear (1) boss that radial component makes moving gear (2), frictional force between the outer wall by the penetrating body of fixed gear (1) boss and the inwall of the penetrating body of moving gear (2) boss makes fixed gear (1) drive moving gear (2) reversing drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100214557A CN103089969A (en) | 2013-01-21 | 2013-01-21 | Double-way transmission gear without gear backlash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100214557A CN103089969A (en) | 2013-01-21 | 2013-01-21 | Double-way transmission gear without gear backlash |
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| CN103089969A true CN103089969A (en) | 2013-05-08 |
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| CN2013100214557A Pending CN103089969A (en) | 2013-01-21 | 2013-01-21 | Double-way transmission gear without gear backlash |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103821915A (en) * | 2014-01-28 | 2014-05-28 | 中捷大宇机械有限公司 | Servo-driving anti-backlash gear transmission box of embroidery machine |
| CN107921545A (en) * | 2015-07-02 | 2018-04-17 | 伊利诺斯工具制品有限公司 | The gear drive arrangement of pipe machining equipment |
| US10730120B2 (en) | 2013-01-09 | 2020-08-04 | Illinois Tool Works | Pipe machining apparatuses and methods of operating the same |
| US10835960B2 (en) | 2013-01-09 | 2020-11-17 | Illinois Tool Works Inc. | Pipe machining apparatuses and methods of operating the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113154A (en) * | 1988-10-20 | 1990-04-25 | Mitsutoyo Corp | Backlash eliminating mechanism for driving gear |
| CN1621713A (en) * | 2003-11-25 | 2005-06-01 | 鲍勃斯脱股份有限公司 | Anti-backlash device in a gear |
| CN200978941Y (en) * | 2006-07-21 | 2007-11-21 | 北京理工大学 | Device for eliminating cylindrical gear backlash |
| DE202010016197U1 (en) * | 2010-12-06 | 2011-02-17 | Wmh Herion Antriebstechnik Gmbh | Backlash-free gear |
| CN102466021A (en) * | 2010-11-08 | 2012-05-23 | 王乃芳 | Helical gear and clearance eliminating structure thereof |
| CN102588559A (en) * | 2012-02-13 | 2012-07-18 | 北京波尔通导科技有限公司 | Gapless gear transmission device and method for removing gear transmission gap |
-
2013
- 2013-01-21 CN CN2013100214557A patent/CN103089969A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113154A (en) * | 1988-10-20 | 1990-04-25 | Mitsutoyo Corp | Backlash eliminating mechanism for driving gear |
| CN1621713A (en) * | 2003-11-25 | 2005-06-01 | 鲍勃斯脱股份有限公司 | Anti-backlash device in a gear |
| CN200978941Y (en) * | 2006-07-21 | 2007-11-21 | 北京理工大学 | Device for eliminating cylindrical gear backlash |
| CN102466021A (en) * | 2010-11-08 | 2012-05-23 | 王乃芳 | Helical gear and clearance eliminating structure thereof |
| DE202010016197U1 (en) * | 2010-12-06 | 2011-02-17 | Wmh Herion Antriebstechnik Gmbh | Backlash-free gear |
| CN102588559A (en) * | 2012-02-13 | 2012-07-18 | 北京波尔通导科技有限公司 | Gapless gear transmission device and method for removing gear transmission gap |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10730120B2 (en) | 2013-01-09 | 2020-08-04 | Illinois Tool Works | Pipe machining apparatuses and methods of operating the same |
| US10835960B2 (en) | 2013-01-09 | 2020-11-17 | Illinois Tool Works Inc. | Pipe machining apparatuses and methods of operating the same |
| CN103821915A (en) * | 2014-01-28 | 2014-05-28 | 中捷大宇机械有限公司 | Servo-driving anti-backlash gear transmission box of embroidery machine |
| CN107921545A (en) * | 2015-07-02 | 2018-04-17 | 伊利诺斯工具制品有限公司 | The gear drive arrangement of pipe machining equipment |
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Application publication date: 20130508 |