CN103115136B - Rotary reducer - Google Patents
Rotary reducer Download PDFInfo
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- CN103115136B CN103115136B CN201310072523.2A CN201310072523A CN103115136B CN 103115136 B CN103115136 B CN 103115136B CN 201310072523 A CN201310072523 A CN 201310072523A CN 103115136 B CN103115136 B CN 103115136B
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- output gear
- rotary reducer
- inner race
- pivoting support
- tooth
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Abstract
The invention discloses a kind of rotary reducer, belong to speed reducer technical field.The present invention includes rotary reducer and pivoting support, pivoting support comprises inner race and outer race, between inner race and outer race, rolling element is housed, described rotary reducer is fixed on mounting bracket, mounting bracket and described outer race are rigidly connected, the bottom of rotary reducer is extended with output gear, being meshed with described inner race of output gear, the upper-end surface of output gear exceeds the upper-end surface of described inner race, the profile of tooth of described output gear is thinning gradually from lower end to upper end, and tooth top to slope inwardly formation slight taper in upper half part.The present invention improves output gear, avoids the local tooth force phenomenon occurred when output gear and pivoting support run-off the straight, ensure that output gear engages with pivoting support and is tending towards uniformity.
Description
Technical field
The present invention relates to a kind of rotary reducer that output gear is improved, belong to rotary reducer technical field.
Background technique
Its swirl gear of existing engineering machinery works under long-term overburdening environment; the output gear of rotary reducer often there will be broken teeth phenomenon; and institute's fracture location major part is all in output gear upper end; fracture initiation position is near tooth root; fracture cause is that gear teeth local pressure is excessive, exceeds permissible bending stress and rigidly fractureing of producing.Analyze the output gear of broken teeth, find that the gear teeth of output gear are uneven along the wearing and tearing of teeth directional direction, present upper end serious wear, lower end only produces mild wear.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art part, the invention provides a kind of rotary reducer, output gear is improved, avoids the local tooth force phenomenon occurred when output gear and pivoting support run-off the straight, ensure that output gear engages with pivoting support and be tending towards uniformity.
The present invention is achieved through the following technical solutions: a kind of rotary reducer, it comprises rotary reducer and pivoting support, pivoting support comprises inner race and outer race, between inner race and outer race, rolling element is housed, described rotary reducer is fixed on mounting bracket, mounting bracket and described outer race are rigidly connected, the bottom of rotary reducer is extended with output gear, being meshed with described inner race of output gear, the upper-end surface of output gear exceeds the upper-end surface of described inner race, the profile of tooth of described output gear is thinning gradually from lower end to upper end, namely the slightly little tip relief amount of profile of tooth upper end common normal line numerical value of output gear is slightly large, and common normal line numerical value slightly large tip relief amount in lower end is slightly little, tooth top to slope inwardly formation slight taper in upper half part.
The tooth top of described output gear starts intilted position at distance facewidth place, 0.4 ~ 0.5, lower end surface, and the distance of 0.25 modulus is inwardly shunk in the tooth top upper end of described output gear.
The invention has the beneficial effects as follows: the present invention improves output gear, avoid the local tooth force phenomenon occurred when output gear and pivoting support run-off the straight, ensure that output gear engages with pivoting support and be tending towards uniformity.When output gear after adjusting can ensure to work under speed reducer is in underloading situation, output gear lower end is meshed with pivoting support inner race, along with rotary reducer transmitting torque increases gradually, output gear upper end is drawn close the phenomenon of outwards drawing close lower end inwards and is also increased gradually, and the structure of teeth directional thickness-tapered ensure that the engagement of the whole gear teeth, greatly increase area of contact and reduce contact stress, thus ensure that the uniform force of the whole flank of tooth, prevent the gear teeth from rupturing, substantially increase the working life of speed reducer.
Accompanying drawing explanation
The present invention is further described according to drawings and embodiments below.
Fig. 1 is general structure schematic diagram of the present invention;
Fig. 2 is output gear structural representation of the present invention;
Fig. 3 is output gear profile of tooth stereogram of the present invention;
Fig. 4 is the A direction view of Fig. 3.
In figure, 1, rotary reducer, 2, output gear, 3, inner race, 4, rolling element, 5, outer race, 6, mounting bracket.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, Figure 2, Figure 3, Figure 4,
A kind of rotary reducer, it comprises rotary reducer 1 and pivoting support, pivoting support comprises inner race 3 and outer race 5, rolling element 4 is housed between inner race 3 and outer race 5, described rotary reducer 1 is fixed on mounting bracket 6, mounting bracket 6 and described outer race 5 are rigidly connected, the bottom of rotary reducer 1 is extended with output gear 2, being meshed with described inner race 3 of output gear 2, the upper-end surface of output gear 2 exceeds the upper-end surface of described inner race 3, the profile of tooth of described output gear 2 is thinning gradually from lower end to upper end, namely the slightly little tip relief amount of profile of tooth upper end common normal line numerical value of output gear 2 is slightly large, and common normal line numerical value slightly large tip relief amount in lower end is slightly little, tooth top to slope inwardly formation slight taper in upper half part.
The tooth top of described output gear 2 starts intilted position at distance facewidth place, 0.4 ~ 0.5, lower end surface, and the distance of 0.25 modulus is inwardly shunk in the tooth top upper end of described output gear 2.
Work of the present invention is originally: the swivel gear of engineering machinery is primarily of pivoting support and rotary reducer two part composition, pivoting support is also known as turntable bearing, primarily of inner race 3, outer race 5, rolling element 4 three part composition, play and support the whole turntable ensure that whole turntable of getting on the bus can carry out 360 degree of effects rotated freely around the center of pivoting support of getting on the bus; Rotary reducer is fixed by screws on mounting bracket 6, the outer race 5 of mounting bracket 6 and pivoting support adopts screw to be rigidly connected (as shown in Figure 1), rotary reducer play the moment of torsion that oil hydraulic motor is passed over carry out slowing down increasing turn round and be delivered to the inner race 3(gear ring of pivoting support by output gear) on, drive the spinning movement of pivoting support and whole turntable of getting on the bus.
During rotary reducer work, output gear is meshed with pivoting support, normal force F suffered during engagement
na tangential component F can be decomposed into
twith a radial component F
r, and F
t=2000T/d; F
r=F
t* tan α; F
n=F
t/ cos α, the moment of torsion that in formula, T transmits for output gear, larger from formula visible output gear transmitting torque value T, tangential component F
tlarger, the radial component F that it produces
rlarger, simultaneously because the mounting type of output gear on swivel gear is that cantilever type is installed, so output gear axis and pivoting support axis will inevitably occur tilting in practical work process, and output gear upper end tilts inward, lower end, toward outer incline (as shown in Figure 1), now just there will be output gear and pivoting support upper-end contact, the phenomenon that lower end is thrown off, the moment of torsion that output gear transmits is larger, radial component F
rlarger, this tilt phenomenon is more serious, and whole teeth directional unbalance stress is more obvious, when output gear upper end local pressure exceedes actual allowable stress, will inevitably occur local, output gear upper end broken teeth phenomenon.
Occur when working for avoiding overburden that gear upper-end contact lower end is thrown off initiation stress and concentrated, rotary reducer output gear common normal line numerical value is carried out trace adjustment along teeth directional direction, and tooth top tip relief amount is also adjusted accordingly, make the slightly smaller tip relief amount of the common normal line numerical value of upper end larger, the slightly larger tip relief amount of common normal line numerical value of lower end is smaller, namely upper end transverse tooth thickness is thinner, lower end transverse tooth thickness thicker (as shown in Figure 3, Figure 4).When output gear after adjusting can ensure to work under speed reducer is in underloading situation, (about 10 ~ 15mm) is meshed with pivoting support gear ring in output gear lower end, along with rotary reducer transmitting torque increases gradually, output gear upper end is drawn close the phenomenon of outwards drawing close lower end inwards and is also increased gradually, and the design of teeth directional thickness-tapered just ensure that the engagement of the whole gear teeth, greatly increase area of contact and reduce contact stress, thus ensure that the uniform force of the whole flank of tooth, substantially increase the working life of speed reducer.
Claims (2)
1. a rotary reducer, it is characterized in that: it comprises rotary reducer (1) and pivoting support, pivoting support comprises inner race (3) and outer race (5), rolling element (4) is housed between inner race (3) and outer race (5), described rotary reducer (1) is fixed on mounting bracket (6), mounting bracket (6) and described outer race (5) are rigidly connected, the bottom of rotary reducer (1) is extended with output gear (2), output gear (2) is meshed with described inner race (3), the upper-end surface of output gear (2) exceeds the upper-end surface of described inner race (3), the profile of tooth of described output gear (2) is thinning gradually from lower end to upper end, namely the slightly little tip relief amount of profile of tooth upper end common normal line numerical value of output gear (2) is slightly large, and common normal line numerical value slightly large tip relief amount in lower end is slightly little, tooth top to slope inwardly formation slight taper in upper half part.
2. rotary reducer according to claim 1, it is characterized in that: the tooth top of described output gear (2) starts intilted position at distance facewidth place, 0.4 ~ 0.5, lower end surface, and the distance of 0.25 modulus is inwardly shunk in the tooth top upper end of described output gear (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072523.2A CN103115136B (en) | 2013-03-06 | 2013-03-06 | Rotary reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310072523.2A CN103115136B (en) | 2013-03-06 | 2013-03-06 | Rotary reducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103115136A CN103115136A (en) | 2013-05-22 |
| CN103115136B true CN103115136B (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310072523.2A Active CN103115136B (en) | 2013-03-06 | 2013-03-06 | Rotary reducer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157550A (en) * | 1984-01-28 | 1985-08-17 | Hitachi Constr Mach Co Ltd | Reduction gear |
| RU2206492C2 (en) * | 2001-04-26 | 2003-06-20 | Марийский государственный технический университет | Ogger manipulator slewing circle |
| DE20218078U1 (en) * | 2002-11-21 | 2004-04-01 | Liebherr-Werk Biberach Gmbh | Slewing gear brake of a crane slewing gear |
| CN201485205U (en) * | 2009-07-20 | 2010-05-26 | 江苏赛富隆重工有限公司 | Gantry crane rotating mechanism |
| CN102218572A (en) * | 2011-05-31 | 2011-10-19 | 中国航空动力机械研究所 | Shaping method and manufacturing method for involute straight tooth planetary transmission gear |
| CN202220061U (en) * | 2011-09-13 | 2012-05-16 | 三一集团有限公司 | Slewing drive device and engineering machinery with same |
| CN203146767U (en) * | 2013-03-06 | 2013-08-21 | 徐州科源液压股份有限公司 | Rotation reducer |
-
2013
- 2013-03-06 CN CN201310072523.2A patent/CN103115136B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157550A (en) * | 1984-01-28 | 1985-08-17 | Hitachi Constr Mach Co Ltd | Reduction gear |
| RU2206492C2 (en) * | 2001-04-26 | 2003-06-20 | Марийский государственный технический университет | Ogger manipulator slewing circle |
| DE20218078U1 (en) * | 2002-11-21 | 2004-04-01 | Liebherr-Werk Biberach Gmbh | Slewing gear brake of a crane slewing gear |
| CN201485205U (en) * | 2009-07-20 | 2010-05-26 | 江苏赛富隆重工有限公司 | Gantry crane rotating mechanism |
| CN102218572A (en) * | 2011-05-31 | 2011-10-19 | 中国航空动力机械研究所 | Shaping method and manufacturing method for involute straight tooth planetary transmission gear |
| CN202220061U (en) * | 2011-09-13 | 2012-05-16 | 三一集团有限公司 | Slewing drive device and engineering machinery with same |
| CN203146767U (en) * | 2013-03-06 | 2013-08-21 | 徐州科源液压股份有限公司 | Rotation reducer |
Non-Patent Citations (1)
| Title |
|---|
| 齿轮噪声与齿轮修形;袁野;《机械研究与应用》;20061031;第19卷(第5期);第2页第1栏最后一段及图2 * |
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| Publication number | Publication date |
|---|---|
| CN103115136A (en) | 2013-05-22 |
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