CN1041996A - Hovekov toothed gearing - Google Patents
Hovekov toothed gearing Download PDFInfo
- Publication number
- CN1041996A CN1041996A CN 88107595 CN88107595A CN1041996A CN 1041996 A CN1041996 A CN 1041996A CN 88107595 CN88107595 CN 88107595 CN 88107595 A CN88107595 A CN 88107595A CN 1041996 A CN1041996 A CN 1041996A
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- CN
- China
- Prior art keywords
- tooth
- tooth top
- hovekov
- changeover portion
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The Hovekov transmission device, it comprises at least two gear parts, and the tooth of each gear part has tooth top, tooth root and is connected tooth top and the changeover portion of tooth root, and the profile of tooth top on the Normal section is made of crest curve (ab).The part of the changeover portion that is connected with tooth top (be) has convex on the Normal section, its radius of curvature (ρ
2) less than the radius of curvature (ρ of tooth top
l).
Description
The present invention relates to machinery manufacturing technology field, more particularly, relate to Hovekov toothed gearing
At the manufacturing retarder of universal machine, and in Transport Machinery manufacturing industry and heavy machinery manufacturing industry, be suitable for most and adopt gear drive of the present invention.
At present, in the use reality of gear drive, exist bearing capacity that improves gear drive and the problem that reduces its consumption of materials.This problem can be with solving with technologic method on the various structures, and one of them is exactly a geometrical shape of improving tooth.
Hovekov toothed gearing is known.It comprises at least two gear parts, profile of tooth on each part is by tooth top, tooth root and be connected tooth top and the changeover portion of tooth root is formed, the profile of tooth top constitutes (" the Hovekov Cylindrical gear actuator of two-wire engagement " by crest curve on its Normal section, russian national standard 15023-76,1976).Changeover portion has the surface of involute shape, and it makes between the intermeshing tooth surface that in the pitch circle surface segment of gear part, the gap is quite little.
This gear drive only could improve its contact strength for the lower tooth of the hardness ratio of mating surface.
For the tooth of high hardness, it is unfavorable adopting this gear drive, because, because the gap is little, changeover portion enters working state faster, and the contact strength of changeover portion is low, so degrading that the pitch circle surface area of gear part just is subjected to aggravate gradually.The thickness low LCL of tooth root has also limited its resistance to flexure in addition.
Another kind of Hovekov toothed gearing also is known, it also comprises at least two gear parts, the profile of tooth of each tooth on the gear part is by tooth top, tooth root and be connected tooth top and the changeover portion of tooth root is formed, the profile of tooth top is formed (SU by crest curve on its normal cross section, A, 735855).Changeover portion has the profile of spill on normal cross section, like this, when employing has the gear part of high hardness tooth, can guarantee to have desired gap in the pitch circle surface segment of gear part.Two sections profiles of tooth of tooth top and tooth root are made with respect to symmetry axis and are removed a segment distance, make the thickness of tooth root widely greater than the thickness of tooth top, and the result has just improved the resistance to flexure of root, so the bulk strength of tooth has also improved.
But the tooth top resistance to flexure of gear is not enough, has hindered the further raising of the bearing capacity of tooth.
Basic task of the present invention is exactly to create a kind of Hovekov toothed gearing with such tooth-shape structure, it keeps having between the mating surface of tooth under the situation in necessary gap in transition zone, can also guarantee to improve the resistance to flexure of tooth top, thereby improve the bearing capacity of gear integral body than the highland.
Being proposed of task is such determining: in the Hovekov gearing of at least two gear parts, each tooth of gear part is by tooth top, tooth root and be connected tooth top and the changeover portion of tooth root is formed, the profile of tooth top is made of crest curve on its normal cross section, according to the present invention, the changeover portion part that is connected with tooth top has convex on normal cross section profile, its radius of curvature is less than the radius of curvature of tip curve.
Constitute the part of changeover portion according to the present invention, can increase the thickness of tooth top dangerous section, thereby under the situation in the gap that keeps on the pitch circle surface segment of gear part being necessary between the intermeshing tooth surface, can improve its resistance to flexure.
Set forth with reference to the accompanying drawings in the accompanying drawings according to instantiation of the present invention:
Fig. 1 represents the engagement situation of gear part on the section of end;
Fig. 2 is the tooth of gear part;
Fig. 3 is the profile of tooth on normal cross section;
Fig. 4-the 6th meshes the segment of situation on out of phase according to Hovekov toothed gearing of the present invention.
The Hovekov transmission device comprises at least two gear parts 1 and 2(Fig. 1).Each tooth 3 in these two parts 1,2 all has tooth top 4(Fig. 2), tooth root 5 and the changeover portion 6 that is connected tooth top and tooth root.
The tooth top 4 of tooth 3 on the Normal section has the profile (Fig. 3) that is made of crest curve ab, the radius of curvature ρ of this section crest curve
1Normally change.
Tooth root 5(Fig. 2) have Fig. 3 by concave curve cd() profile that constituted.
Changeover portion 6(Fig. 2) has bc section profile (Fig. 3).Changeover portion 6(Fig. 2) be connected with tooth top one section has crest curve be(Fig. 3) profile that constituted.Crest curve be has the radius of curvature ρ of variation usually
2, this radius of curvature is all the time less than ρ
1Because ρ
2＜ρ
1, tooth top 4(Fig. 2) thickness compare with the thickness of prototype (dotting among Fig. 3) and increased by the amount of 2 △ (Fig. 3).This just makes tooth top 4(Fig. 2) and the resistance to flexure of the integral body of tooth 3 improved, simultaneously, at gear part 1,2 pitch circle surfaces 7,8(Fig. 1) on, between the surface of the changeover portion 6 of intermeshing tooth 3, in all Fig. 4-6, all keep desired gap on the represented mesh phase, so just can on Hovekov toothed gearing provided by the invention, adopt the tooth of high hardness.
From gear part 1(Fig. 1) to gear part 2, moment of torsion transmits in the following manner.Driving gear part 1 rotates to counterclockwise.On the arbitrary end cross section of being investigated, driving gear part 1(Fig. 1) tooth root 5(Fig. 4 of tooth 3) begin be and driven gear part 2(Fig. 1) tooth top 4(Fig. 4 of a son 3) be meshed.
Then, paired tooth 3(Fig. 5) by neutral position, at this moment the gap minimum between the changeover portion 6 in pitch circle surface region 7,8.
Then, tooth top 4(Fig. 6 of tooth 3) with gear part 2(Fig. 1 of pairing) tooth root 5 engagement of tooth 3.So driven gear just rotates towards clockwise direction.Because the thickness of tooth top 4 (Fig. 4-6) has been thickeied 2 △ (Fig. 3), the stress that produces in the tooth top is little than in the tooth top that adopts prototype just, so just can improve the moment of torsion that is transmitted.
The Hovekov toothed gearing of making according to the present invention can improve its load of transmitting under the constant prerequisite of the size that keeps transmission device and weight, perhaps, under specified load, compare with existing technical merit, can reduce the consumption of materials of transmission device.
Claims (1)
- A kind of Hovekov toothed gearing, it comprises at least two gear parts (1,2), the tooth of each gear part (3) has tooth top (4), tooth root (5) and the changeover portion that is connected tooth top and tooth root (6), profile on the tooth top Normal section is made of crest curve (ab), this device is characterised in that the part (be) of the changeover portion that is connected with tooth top (4) has convex on the Normal section, its radius of curvature (ρ 2) less than the radius of curvature (ρ of tooth top 4 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107595 CN1041996A (en) | 1988-10-08 | 1988-10-08 | Hovekov toothed gearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88107595 CN1041996A (en) | 1988-10-08 | 1988-10-08 | Hovekov toothed gearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1041996A true CN1041996A (en) | 1990-05-09 |
Family
ID=4834699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88107595 Pending CN1041996A (en) | 1988-10-08 | 1988-10-08 | Hovekov toothed gearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1041996A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976316A (en) * | 2015-06-10 | 2015-10-14 | 宁夏大学 | Gear with multiple arc tooth profiles |
| CN107407393A (en) * | 2015-03-30 | 2017-11-28 | 新日铁住金株式会社 | High-strength gear |
-
1988
- 1988-10-08 CN CN 88107595 patent/CN1041996A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107407393A (en) * | 2015-03-30 | 2017-11-28 | 新日铁住金株式会社 | High-strength gear |
| CN107407393B (en) * | 2015-03-30 | 2019-08-16 | 日本制铁株式会社 | High-strength gear |
| CN104976316A (en) * | 2015-06-10 | 2015-10-14 | 宁夏大学 | Gear with multiple arc tooth profiles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |