CN203936696U - A kind of helical gear anti-backlash mechanism - Google Patents
A kind of helical gear anti-backlash mechanism Download PDFInfo
- Publication number
- CN203936696U CN203936696U CN201420399472.4U CN201420399472U CN203936696U CN 203936696 U CN203936696 U CN 203936696U CN 201420399472 U CN201420399472 U CN 201420399472U CN 203936696 U CN203936696 U CN 203936696U
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- Prior art keywords
- gear
- driven gear
- tapered sleeve
- driven
- backlash mechanism
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Abstract
The utility model provides a kind of helical gear anti-backlash mechanism that utilizes tapered sleeve to install, and this mechanism is meshed by a gear of two coaxial mounted gears and another axle, and it is fixing that gear adopts accurate elastic conical drogue to install.Its gap principle that disappears is to utilize the clamping frictional force of elastic conical drogue and axle to make a slice in two plate gears move axially that the Gear Helix having rigidly fixed with another sheet produces dislocation and the gap that disappears finally will move axially the fastening formation rigidity of the gear putting in place anti-backlash mechanism.The utility model helical gear anti-backlash mechanism adopts the rigidity gap that disappears, and during work, the flank of tooth is not subject to spring pressure, and gear wear is little, and lathe energy consumption is low, and when gear wear needs adjusting play, method of adjustment is simple and reliable, can meet various working condition requirements; Installation accuracy is high, good rigidly, installation site are not affected by axial step, has reduced spindle processing difficulty, and two plate gears of rigidity anti-backlash mechanism finally all rigidly fix, thereby not affected by main shaft rotating during work.
Description
Technical field
The utility model relates to a kind of helical gear anti-backlash mechanism, particularly a kind ofly for lathe precision drive, utilizes helical gear rigidity that tapered sleeve the is installed gap transmission mechanism that disappears.
Background technology
Gear drive is widely used in Machine Tool design and in manufacturing, along with the requirements at the higher level of lathe to precision, rigidity, speed and energy consumption, to machine tool gears transmission mechanism, especially the gear drive of machine tool chief axis is also had higher requirement, wherein one is requirement gear drive gapless, be that gear drive possesses the gap of disappearing function, to meet the instructions for use of precision drive and high-performance cutter, this just need to carry out the design of gear drive anti-backlash mechanism.Traditional gear clearance elimination mechanism design adopts split gear elastic gap-eliminating mode, consult Fig. 1, figure middle gear 1 ' is installed on axle 4 ', by key 2 ' and back-up ring 3 ', form and being fixedly connected with of axle, another is installed on axle 7 ' specifications parameter identical gear 8 ' and gear 9 ', master gear 8 ' forms and being fixedly connected with of axle with key 12 ' and back-up ring 6 ', pinion 9 ' kink is contained on axle and can rotates around axle, two gear faces are processed with and the stagger decile groove 10 ' of certain angle of helix, spring 11 ' is housed in groove, pin 5 ' restriction staggered positions, when gear 1 ' and gear 8 ', during gear 9 ' engagement, spring makes gear 8 ', gear 9 ' produces relative rotation displacement and the gap that disappears.This technical scheme adopts the coaxial installation of major and minor two plate gears and meshes with another gear, master gear is fixed on axle, pinion kink is on axle, can pivot, on the end face that two plate gears are close to, be processed with the groove for mounting spring, the helix that groove and two plate gears align (being straight line during spur gear) dislocation processing, after spring fitting, spring promotes pinion rotation, and the helix of two gears is misplaced in the left and right flank of tooth close contact of the different teeth of the gear being engaged with and the gap that disappears.In this kind of elastic gap-eliminating mode, spring pressure is selected, and its pressure also acts on the flank of tooth always, and this just makes this kind gap mode that disappears have limitation and not enough.During lathe work, because processing object is different, strength of gear alters a great deal, the fixing spring gap power that disappears can not adapt to the variation of external force, if adopt the larger spring gap power that disappears, the friction that obviously can increase the gear field of conjugate action, aggravation gear wear, increases lathe power consumption, reduces transmission efficiency simultaneously.In addition, this type of anti-backlash mechanism adopts the gap mode that disappears of pinion, therefore only has master gear to be applicable to carry-over moment, and transmission direction when mechanism works is limited.
Utility model content
(1) technical problem that will solve
The technical problems to be solved in the utility model is to overcome deficiency of the prior art, a kind of accurate seamless connectivity that utilizes accurate elastic conical drogue to carry out gear and axle is provided, improve gear installation accuracy and rigidity, by repeatedly adjusting the mode of gear clearance, adapt to helical gear anti-backlash mechanism and the gap method that disappears of the variation of external force.
(2) technical scheme
For solving the problems of the technologies described above, the utility model provides a kind of helical gear anti-backlash mechanism, comprise active rotating shaft 4, driven spindle 7, driving gear 1, simultaneously with the first driven gear 8 and second driven gear 9 of described driving gear 1 engagement, described driving gear 1 is fixed on described active rotating shaft 4 by the first tapered sleeve 3 and screw, described the first driven gear 8 is fixed on described driven spindle 7 by the second tapered sleeve 6 and screw, described the second driven gear 9 is fixed on described driven spindle 7 by the 3rd tapered sleeve 11 and screw, the gear teeth of described the first driven gear and described the second driven gear stagger mutually, and described the first driven gear and described the second driven gear are engaged in a left side for the different gear teeth of described driving gear 1, the right flank of tooth, on the end face of described the second driven gear, be circumferentially evenly equipped with adjustment screw 10, the end contact of the head of described adjustment screw 10 and described the first driven gear 8.
Further, the upper surface of the upper surface of described the first driven gear 8 and described driving gear 1 is positioned at same plane.
Further, the lower surface of the lower surface of described the second driven gear 9 and described driving gear 1 is positioned at same plane.
Further, the end of described the first tapered sleeve, described the second tapered sleeve and described the 3rd tapered sleeve is equipped with backstop step 15, and the end face of described backstop step 15 is circumferentially evenly equipped with installing hole 14.
Further, the jacket wall of described the first tapered sleeve, described the second tapered sleeve and the 3rd tapered sleeve offers straight trough 13 along axis direction.
Further, offer cannelure 12 on the gear teeth of described driving gear 1, described cannelure 12 is between described the first driven gear and described the second driven gear.
The utility model also provides a kind of gap method that disappears, and comprises the following steps:
A, by the first tapered sleeve, driving gear is fixed on active rotating shaft 4, by the second tapered sleeve, the first driven gear is fixed on driven spindle 7 simultaneously, described the first driven gear and the engagement of described driving gear;
B, by the reverse kink of the second driven gear 9 with the 3rd tapered sleeve on driven spindle 7, the end face laminating of described the second driven gear and the first driven gear 8, rotate the screw that third hand tap puts, force the 3rd tapered sleeve distortion and driven spindle 7 in not locking but have the state rubbing, adjustment screw 10 on turn the second driven gear axially moves described the second driven gear, the now helix of described the first driven gear and described the second driven gear dislocation the gap that disappears from the left and right flank of tooth close contact of the different teeth of driving gear;
C, continue to turn adjustment screw and make the second driven gear 9 concordant with the lower surface of driving gear 1, finally tighten the screw that third hand tap puts, the second driven gear is fixed on driven spindle.
(3) beneficial effect
Compare with traditional elastic gap-eliminating mechanism, the utility model helical gear anti-backlash mechanism adopts the rigidity gap that disappears, and during work, the flank of tooth is not subject to spring pressure, gear wear is little, and lathe energy consumption is low, when gear wear needs adjusting play, method of adjustment is simple and reliable, can meet various working condition requirements; Tapered sleeve is installed the hub portion size that has been equivalent to lengthen gear, tapered sleeve is connected tight gapless with axle and gear hole, thereby installation accuracy is high, installation site is not affected by axial step, reduced spindle processing difficulty, two plate gears of rigidity anti-backlash mechanism finally all rigidly fix, thereby work time is not affected by main shaft rotating.
Accompanying drawing explanation
Fig. 1 is the generalized section of traditional elastic gap-eliminating mechanism;
Fig. 2 is the generalized section of the utility model helical gear anti-backlash mechanism;
Fig. 3 is the generalized section of the tapered sleeve in the utility model helical gear anti-backlash mechanism;
Fig. 4 is the installation end view of the tapered sleeve in the utility model helical gear anti-backlash mechanism.
The specific embodiment
Consult Fig. 2～Fig. 4, the utility model provides a kind of helical gear anti-backlash mechanism, comprise active rotating shaft 4, driven spindle 7, driving gear 1, simultaneously with the first driven gear 8 and second driven gear 9 of driving gear 1 engagement, driving gear 1 is fixed on active rotating shaft 4 by the first tapered sleeve 3 and screw, the first driven gear 8 is fixed on driven spindle 7 by the second tapered sleeve 6 and screw, and the second driven gear 9 is fixed on driven spindle 7 by the 3rd tapered sleeve 11 and screw, the gear teeth of the first driven gear and the second driven gear stagger mutually, and the first driven gear and the second driven gear are engaged in a left side for the different gear teeth of driving gear 1, the right flank of tooth (being generally the relative flank of tooth of adjacent two gear teeth), on the end face of the second driven gear, be circumferentially evenly equipped with adjustment screw 10, the end contact of the head of this adjustment screw 10 and the first driven gear 8, in order to reach better transmission effect, the upper surface of the first driven gear 8 in the present embodiment and the upper surface of driving gear 1 are positioned at same plane, the lower surface of the second driven gear 9 and the lower surface of driving gear 1 are positioned at same plane simultaneously, for the ease of location and installation, in the end of the first tapered sleeve, the second tapered sleeve and the 3rd tapered sleeve, be equipped with backstop step 15, at the end face of this backstop step 15, be circumferentially evenly equipped with installing hole 14, in this installing hole, be arranged with screw, in order to make tapered sleeve produce strain, on the jacket wall of the first tapered sleeve, the second tapered sleeve and the 3rd tapered sleeve, along axis direction, offer straight trough 13, accurate engagement for facewidth direction when wearing and tearing are adjusted afterwards offers cannelure 12 on the gear teeth of driving gear 1, and this cannelure 12 is between the first driven gear and the second driven gear.
Below offseting gap method (installation method) elaborates;
Driving gear 1 is connected with the first tapered sleeve 3, tighten the screw 2 on the first tapered sleeve, this driving gear is fixed on active rotating shaft 4, in like manner, the first driven gear 8 and the second tapered sleeve are fixed on driven spindle 7 by tightening screw, during installation, first upper surface of driven gear 8 and the upper surface of driving gear are concordant, by the reverse kink of the second driven gear 9 with the 3rd tapered sleeve on driven spindle 7, end face and the first driven gear 8 laminatings, rotate the screw that third hand tap puts, force the 3rd tapered sleeve distortion to hold tightly and produce friction with axle, rotation adjustment screw 10, this adjustment screw promotes the second driven gear 9 and moves along axis direction, now, the helix of the first driven gear 8 and the second driven gear 9 produces dislocation, and rely on frictional force from the left and right flank of tooth close contact of the different teeth of driving gear the gap that disappears, continue to turn adjustment screw and make the second driven gear 9 concordant with the lower surface of driving gear 1, finally tighten the screw that the third hand tap of the second driven gear puts, the second driven gear is fixed on driven spindle.
Compare with traditional elastic gap-eliminating mechanism, the utility model helical gear anti-backlash mechanism adopts the rigidity gap that disappears, and during work, the flank of tooth is not subject to spring pressure, gear wear is little, and lathe energy consumption is low, when gear wear needs adjusting play, method of adjustment is simple and reliable, can meet various working condition requirements; Tapered sleeve is installed the hub portion size that has been equivalent to lengthen gear, tapered sleeve is connected tight gapless with axle and gear hole, thereby installation accuracy is high, good rigidly, installation site are not affected by axial step, reduced spindle processing difficulty, two plate gears of rigidity anti-backlash mechanism finally all rigidly fix, thereby work time is not affected by main shaft rotating.
The above is only preferred embodiment of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. a helical gear anti-backlash mechanism, comprise active rotating shaft (4), driven spindle (7), driving gear (1), simultaneously with the first driven gear (8) and second driven gear (9) of described driving gear (1) engagement, it is characterized in that: described driving gear (1) is fixed on described active rotating shaft (4) by the first tapered sleeve (3) and screw, described the first driven gear (8) is fixed on described driven spindle (7) by the second tapered sleeve (6) and screw, described the second driven gear (9) is fixed on described driven spindle (7) by the 3rd tapered sleeve (11) and screw, the gear teeth of described the first driven gear and described the second driven gear stagger mutually, and described the first driven gear and described the second driven gear are engaged in a left side for the different gear teeth of described driving gear (1), the right flank of tooth, on the end face of described the second driven gear, be circumferentially evenly equipped with adjustment screw (10), the end contact of the head of described adjustment screw (10) and described the first driven gear (8).
2. helical gear anti-backlash mechanism as claimed in claim 1, is characterized in that: the upper surface of the upper surface of described the first driven gear (8) and described driving gear (1) is positioned at same plane.
3. helical gear anti-backlash mechanism as claimed in claim 2, is characterized in that: the lower surface of the lower surface of described the second driven gear (9) and described driving gear (1) is positioned at same plane.
4. helical gear anti-backlash mechanism as claimed in claim 1, it is characterized in that: the end of described the first tapered sleeve, described the second tapered sleeve and described the 3rd tapered sleeve is equipped with backstop step (15), and the end face of described backstop step (15) is circumferentially evenly equipped with installing hole (14).
5. helical gear anti-backlash mechanism as claimed in claim 4, is characterized in that: the jacket wall of described the first tapered sleeve, described the second tapered sleeve and described the 3rd tapered sleeve offers straight trough (13) along axis direction.
6. the helical gear anti-backlash mechanism as described in claim 1 to 5 any one, it is characterized in that: on the gear teeth of described driving gear (1), offer cannelure (12), described cannelure (12) is between described the first driven gear and described the second driven gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399472.4U CN203936696U (en) | 2014-07-18 | 2014-07-18 | A kind of helical gear anti-backlash mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420399472.4U CN203936696U (en) | 2014-07-18 | 2014-07-18 | A kind of helical gear anti-backlash mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN203936696U true CN203936696U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420399472.4U Expired - Fee Related CN203936696U (en) | 2014-07-18 | 2014-07-18 | A kind of helical gear anti-backlash mechanism |
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| CN (1) | CN203936696U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128835A (en) * | 2014-07-18 | 2014-11-05 | 宁波夏拓机械装备有限公司 | Bevel gear gap eliminating mechanism and gap eliminating method |
| CN108019468A (en) * | 2018-01-15 | 2018-05-11 | 浙江陀曼精密机械有限公司 | Chain digital control gear hobbing machine double bevel gear backlash transmission device |
| CN110193747A (en) * | 2019-06-28 | 2019-09-03 | 环球工业机械（东莞）有限公司 | Ram drive gap eliminates component |
-
2014
- 2014-07-18 CN CN201420399472.4U patent/CN203936696U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104128835A (en) * | 2014-07-18 | 2014-11-05 | 宁波夏拓机械装备有限公司 | Bevel gear gap eliminating mechanism and gap eliminating method |
| CN108019468A (en) * | 2018-01-15 | 2018-05-11 | 浙江陀曼精密机械有限公司 | Chain digital control gear hobbing machine double bevel gear backlash transmission device |
| CN110193747A (en) * | 2019-06-28 | 2019-09-03 | 环球工业机械（东莞）有限公司 | Ram drive gap eliminates component |
| CN110193747B (en) * | 2019-06-28 | 2024-05-10 | 环球工业机械（东莞）有限公司 | Ram transmission clearance elimination assembly |
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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: 20141112 Termination date: 20170718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |