CN103016625A - Circular arc helical gear pair - Google Patents
Circular arc helical gear pair Download PDFInfo
- Publication number
- CN103016625A CN103016625A CN2011102868975A CN201110286897A CN103016625A CN 103016625 A CN103016625 A CN 103016625A CN 2011102868975 A CN2011102868975 A CN 2011102868975A CN 201110286897 A CN201110286897 A CN 201110286897A CN 103016625 A CN103016625 A CN 103016625A
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- gear
- circular arc
- pair
- gear pair
- helical
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Abstract
The invention relates to the field of spatially vertical staggered gear transmission, in particular to a circular arc helical gear pair, which comprises a gear (1) and a gear (2), wherein central shafts of the gear (1) and the gear (2) are mutually and spatially perpendicular. The circular arc helical gear pair is characterized in that axial sections through the central shafts on the gear (1) and the gear (2) are similar to the axial section of a worm wheel, and all of the axial sections are concave in middle parts; normal modules of the gear (1) and the gear (2) are equal, transverse modules are changed along with self helical angles, but the sum of the helical angles of one gear pair is 90 DEG; and an addendum circle, a pitch circle and a root circle of the axial section of the gear (1) on each cross section along the tooth width direction are respectively matched with the circular arc physical dimension of the transverse section of the gear (2). Compared with the prior art, the circular arc helical gear pair has the beneficial effects that spatial helical lines come into contact and are engaged, interference and retardation due to abnormal engagement during transmission are eliminated, additionally, the circular arc helical gear pair has the advantages of two-way transmission of a cylindrical spiral bevel gear and linear engagement of an enveloping worm wheel and a worm, and the carrying capacity is increased.
Description
Technical field
The present invention relates to spatial vertical staggered gear transmission field, relate in particular to a kind of arc spiral gear pair.
Background technique
Transmit in the gear transmission technology that moves between the spatial vertical alternating axis existing, transmission is smaller between 0.2-5 the time, can use the cylindrical screw Helical gear Transmission; Transmission 8 when above, is then used worm drive more greatly, and its deficiency is the former meshing zone mooring points contact, and easy to wear, when vertical interlaced axle position deflection caused undesired engagement, gear pair may interfere or block; The latter is because the drving sprial angle is less, and self transmission friction loss is large, therefore can only be applied in the little helper drive of load.In various employing spatial vertical staggered transmission devices, have to use enveloping worm wheel worm screw or spiral bevel gear type of belt drive, but make enveloping worm, spiral bevel gear must adopt special use, high-precision working machine tool.
Summary of the invention
The purpose of this invention is to provide a kind of arc spiral gear pair and preparation method thereof, overcome the deficiencies in the prior art, when transmitting the motion of spatial vertical between centers, the gear transmission meshing zone is become the contact of spatially spiral camber line by a contact, reduce the contact stress of tooth section, improve the working state of film lubrication, eliminate undesired engagement occurs in the transmission interference and retardance, improve device load-bearing capability.
For solving the problems of the technologies described above, technological scheme of the present invention is:
A kind of arc spiral gear pair, comprise gear one and gear two, the mutual spatial vertical of central shaft of gear one and gear two, axial section by central shaft on described gear one and the gear two is the recessed form in middle part, gear one equates with the normal module of gear two, transverse module then changes with self helix angle, but the helix angle sum of a pair of gear pair is 90 °, and the axial section of described gear one is mating with the circular arc physical dimension in gear two cross sections respectively along the top circle on each cross section of facewidth direction, pitch circle, root circle.
Recessed both sides, axial section middle part by central shaft on described gear one and the gear two are provided with straight section.
The gear range of described gear one and gear two is 0.2-5.
Described profile of tooth is involute profile, also can be arc toothed or the parabola profile of tooth.
Compared with prior art, the invention has the beneficial effects as follows: the gear pair meshing zone is not some contact but one section spatially spiral line contact, it has reduced the contact stress of tooth section, the interference that undesired engagement occurs in the transmission and retardance have been eliminated, the advantage that possesses simultaneously the wire engagement of the helical gear Bidirectional driving of cylindrical screw and enveloping worm wheel worm screw, improve the working state of film lubrication, improved bearing capacity.
Description of drawings
Fig. 1 is embodiment of the invention structural representation.
Among the figure: 1-gear one 2-gear two
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
See Fig. 1, it is a kind of arc spiral gear pair of the present invention example structure schematic diagram, comprise gear 1 and gear 22, the mutual spatial vertical of central shaft of gear 1 and gear 22, axial section by central shaft on gear 1 and the gear 22 and the axial section of worm gear are similar, be the recessed form in middle part, gear 1 equates with the normal module of gear 22, transverse module then changes with self helix angle, gear one profile of tooth has helix angle one β 1, gear two profiles of tooth have helix angle two β 2, the helix angle sum of a pair of gear pair is 90 °, be 2=90 ° of β 1+ β, the axial section of gear 1 is along the top circle dd1 on each cross section of facewidth direction, joint garden d1, root circle dg1 respectively with the circular arc physical dimension in gear 22 cross sections in root circle rg2, joint garden r2, top circle rg2 coupling.The gear range of gear 1 and gear 22 is 0.2-5; Profile of tooth is involute profile, also can be arc toothed or the parabola profile of tooth.When helix angle is larger, the profile of tooth at gear two ends is sharper, this moment gear one with gear two on axial section middle part by central shaft keep recessed form, and straight section should be established in both sides, the crown that both sides are excessively sharp is outwelled, and is beneficial to guarantee the intensity of crown, but can reduces the length of line of contact.
Among the embodiment, gear one 1 numbers of teeth are 21, and gear 22 numbers of teeth are 14, and calculating two gears according to intensity, to get transverse module be 2, and according to gear pair space geometry size, selecting respectively helix angle one β 1 is 33.7 °, and helix angle two β 2 are 56.3 °, 2=90 ° of β 1+ β.When gear 1 was driving wheel, this gear pair velocity ratio was 1.5, and when gear 22 was driving wheel, this gear pair velocity ratio was 0.67.
Claims (4)
1. arc spiral gear pair, comprise gear one and gear two, the mutual spatial vertical of central shaft of gear one and gear two, it is characterized in that, axial section by central shaft on described gear one and the gear two is the recessed form in middle part, gear one equates with the normal module of gear two, transverse module then changes with self helix angle, but the helix angle sum of a pair of gear pair is 90 °, and the axial section of described gear one is mating with the circular arc physical dimension in gear two cross sections respectively along the top circle on each cross section of facewidth direction, pitch circle, root circle.
2. a kind of arc spiral gear pair according to claim 1 is characterized in that, the recessed both sides, axial section middle part by central shaft on described gear one and the gear two are provided with straight section.
3. a kind of arc spiral gear pair according to claim 1 is characterized in that, the gear range of described gear one and gear two is 0.2-5.
4. a kind of arc spiral gear pair according to claim 1 and 2 is characterized in that, described profile of tooth is involute profile, also can be arc toothed or the parabola profile of tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102868975A CN103016625A (en) | 2011-09-23 | 2011-09-23 | Circular arc helical gear pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102868975A CN103016625A (en) | 2011-09-23 | 2011-09-23 | Circular arc helical gear pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103016625A true CN103016625A (en) | 2013-04-03 |
Family
ID=47965572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102868975A Pending CN103016625A (en) | 2011-09-23 | 2011-09-23 | Circular arc helical gear pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103016625A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6148683A (en) * | 1996-10-16 | 2000-11-21 | Fleytman; Yakov | Worm/worm gear transmission |
| US20050028626A1 (en) * | 2003-08-04 | 2005-02-10 | Yakov Fleytman | Gear reduction unit |
| US20060005653A1 (en) * | 2003-04-21 | 2006-01-12 | Yakov Fleytman | Enveloping worm transmission |
| CN101201094A (en) * | 2007-11-20 | 2008-06-18 | 张目 | Helical line semi-circle gear pair |
| CN101701618A (en) * | 2009-11-30 | 2010-05-05 | 浙江先锋机械有限公司 | None self-locking worm and worm wheel retarding mechanism |
-
2011
- 2011-09-23 CN CN2011102868975A patent/CN103016625A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6148683A (en) * | 1996-10-16 | 2000-11-21 | Fleytman; Yakov | Worm/worm gear transmission |
| US20060005653A1 (en) * | 2003-04-21 | 2006-01-12 | Yakov Fleytman | Enveloping worm transmission |
| US20050028626A1 (en) * | 2003-08-04 | 2005-02-10 | Yakov Fleytman | Gear reduction unit |
| CN101201094A (en) * | 2007-11-20 | 2008-06-18 | 张目 | Helical line semi-circle gear pair |
| CN101701618A (en) * | 2009-11-30 | 2010-05-05 | 浙江先锋机械有限公司 | None self-locking worm and worm wheel retarding mechanism |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130403 |