CN2129194Y - Variable pitch tooth-shaped chain sprocket hob - Google Patents
Variable pitch tooth-shaped chain sprocket hob Download PDFInfo
- Publication number
- CN2129194Y CN2129194Y CN 92226376 CN92226376U CN2129194Y CN 2129194 Y CN2129194 Y CN 2129194Y CN 92226376 CN92226376 CN 92226376 CN 92226376 U CN92226376 U CN 92226376U CN 2129194 Y CN2129194 Y CN 2129194Y
- Authority
- CN
- China
- Prior art keywords
- tooth
- profile
- apart
- basic
- silent chain
- 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.)
- Expired - Fee Related
Links
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Landscapes
- Gear Processing (AREA)
Abstract
The utility model belongs to a variable pitch tooth-shaped chain wheel processing cutter, the basic tooth-shape of which is composed of a tooth side straight-line tooth-shape, a tooth top arc-straight-line tooth-shape and a tooth root arc-straight-line tooth-shape; the reference tooth profile parameter is related only to the nominal pitch of the sprocket being machined and is independent of the number of teeth. The tooth root circular arc-straight tooth form of the hob is also a cutting edge. A hobbing cutter is used, so that the series products of the variable-pitch toothed chain and chain wheel with the same nominal pitch and different tooth numbers can be processed, and the universality is high. The hobbing cutter can ensure that the tooth top tooth profile of the chain wheel and the tooth side involute tooth profile of the chain wheel have the same coaxiality precision.
Description
The utility model belongs to switches political loyalty apart from silent chain sprocket wheel process tool.
The used cutter of processing and the sprocket wheel that is complementary apart from silent chain of switching political loyalty is switches political loyalty apart from the silent chain sprocket hob.Switch political loyalty apart from the cutting processing of silent chain sprocket, just be meant and use this class cutter on the general hobbing machine bed, the tooth base is carried out gear hobbing processing.
Switch political loyalty apart from silent chain, belong to the patented product of U.S. Mo Si company originally.It adopts and rolls pin formula linkage, has to switch political loyalty apart from performance.With the sprocket wheel of switching political loyalty and being complementary, be involute gear with specific tooth profile parameter apart from silent chain.Mo Si company is from underground traitorous apart from the tooth profile parameter of silent chain sprocket wheel series of products and the manufacturing technology of the gear teeth.
The purpose of this utility model is to provide a kind of universal hobboing cutter of switching political loyalty apart from silent chain sprocket wheel series of products that can be used for processing.
For with a kind of traitorous sprocket wheel that is complementary apart from silent chain of nominal pitch, no matter the number of teeth what, all can adopt the universal hobboing cutter of same specification to process.Form by cutter hub and cutter tooth and it is characterized in that: 1, switch political loyalty apart from the basic tooth profile of silent chain sprocket hob, see Fig. 1, by flank straight line profile of tooth (1), tooth top circular arc---straight line profile of tooth (2) and tooth root circular arc---straight line profile of tooth (3) is formed, 2, this hobboing cutter basic tooth profile parameter, only relevant with the nominal pitch of processed sprocket wheel, irrelevant with its number of teeth.3, the tooth root circular arc of this hobboing cutter---straight line profile of tooth (3) also is a cutting edge.4, the basic tooth profile parameter of this hobboing cutter also is simultaneously traitorous basic tooth profile parameter apart from silent chain sprocket wheel rack type cutter and plate-like pinion cutter.5, other structure of this hobboing cutter is identical with gear hob.
Switching political loyalty apart from the basic tooth profile of silent chain sprocket hob, is exactly plane tooth bar profile of tooth.For the sprocket wheel of same nominal pitch, no matter the number of teeth what, all can realize the generating motion relation with this plane tooth bar.This is to determine traitorous basic principle apart from silent chain sprocket wheel cutter (comprising hobboing cutter, rack type cutter and pinion cutter etc.) basic tooth profile parameter.
Switch political loyalty and derive as follows apart from silent chain sprocket hob basic tooth profile determination method for parameter and computing formula:
One, switch political loyalty apart from silent chain sprocket hob basic tooth profile parameter, see Fig. 1, wherein the following parameters data that can be directly provide according to Mo Si company product sample are definite.They are:
t
0＝p
α
0＝30°
S
0＝0.5p
h
0＝0.5（d
e－d
f）
Wherein:
P---switch political loyalty apart from silent chain sprocket wheel nominal pitch
t
---hobboing cutter basic tooth profile tooth pitch (5)
α
---hobboing cutter basic tooth profile profile angle (9)
S
0---hobboing cutter basic tooth profile transverse tooth thickness (6)
h
---hobboing cutter basic tooth profile tooth depth (7)
d
---switch political loyalty apart from silent chain sprocket outside diameter circle (25), see Fig. 3
d
f---switch political loyalty apart from silent chain sprocket tooth root circular diameter (26), see Fig. 3
Two, switch political loyalty apart from profile of tooth sprocket hob basic tooth profile height of teeth top (8), can calculate by following theoretical formula:
1, the location dimension of enclosing with sprocket wheel behind the chain apart from silent chain carrier bar (27) of switching political loyalty is calculated:
Switch political loyalty and to enclose positioning relation behind the chain with sprocket wheel, see Fig. 4 apart from silent chain carrier bar (27).As seen from the figure, carrier bar working face (13) and sprocket wheel flank involute profile (19) are tangent contact of C point.The diagram relation also is the generating motion relation of plane tooth bar and this sprocket wheel.Plane pitch line (30) is tangent at the P point with sprocket wheel pitch circle (31), makes pure rolling, and therefore, some P is the working pitch point of plane tooth bar and sprocket wheel.Size PC(42) is location dimension after carrier bar encloses chain.Size OC is the setting circle radius of sprocket wheel, and diameter is d
c(38).Orientation angle is γ (40).They have following geometrical relationship respectively:
PC＝（f＋0.5P COS30°）－（0.5d
0COS (π)/(Z) －0.5d
0）sin30°
d
c＝ (2·PC·COS30°)/(sinγ)
γ＝arc tg（ (PC·COS30°)/(0.5d
0-PC·sin30°) ）
d
0＝ (PZ)/(π)
Wherein:
F---carrier bar working face size (14) is seen Fig. 2
d
---switch political loyalty apart from silent chain sprocket wheel reference diameter (24), see Fig. 3, look the teeth number of sprocket difference, in product sample, list.
d
e---switch political loyalty apart from silent chain sprocket wheel pitch diameter (35)
Z---switch political loyalty apart from the silent chain teeth number of sprocket
2, switch political loyalty and to calculate apart from silent chain sprocket wheel transverse tooth thickness:
As shown in Figure 4, on sprocket wheel setting circle (32), corresponding central angle is the arc length in 2 γ (40) scope, equals tooth pitch and gear teeth teeth groove (17) width sum.So sprocket wheel setting circle transverse tooth thickness S
C(43) can be calculated as follows:
S
C＝ (2d
cπ)/(Z) －d
cγ
3, switch political loyalty apart from silent chain sprocket hob basic tooth profile height of teeth top h
(8), can be calculated as follows:
X＝－（ (0.5P－S)/(2tg30°) ）
h
＝0.5（d
e－d
f）＋X
Wherein:
X---switch political loyalty apart from silent chain sprocket wheel addendum modification
S---switch political loyalty and can calculate by the thick formula of any knuckle-tooth of involute gear apart from silent chain sprocket wheel thickness on pitch circle (44)
Three, switch political loyalty apart from silent chain sprocket hob basic tooth profile radius at tooth tip r
10(10) and tooth fillet radius r
20(11) definite principle:
Switch political loyalty apart from silent chain sprocket hob basic tooth profile tooth root circular arc---straight line profile of tooth (3) also is a cutting edge, use the sprocket tooth form of this hobboing cutter processing, see Fig. 3, form by tooth root profile of tooth (20), involute profile (19) and tooth top profile of tooth (18).The generate profile of tooth of straight line profile of tooth (3) that they are respectively hobboing cutter tooth top circular arcs---straight line profile of tooth (2), flank straight line profile of tooth (1) and tooth root circular arc---.In Fig. 3, some K, some H are respectively the initial point and the terminal point of involute profile.The contact point C that carrier bar, sprocket wheel enclose behind the chain should be between profile of tooth K, H.Guaranteeing that sprocket wheel has under the prerequisite of enough involute profile segment length, considering hobboing cutter basic tooth profile radius at tooth tip r from improving sprocket tooth root intensity angle
10(10) span is 1.0～4.5mm.Consider hobboing cutter basic tooth profile tooth fillet radius r from improving cutter tooth root intensity angle
20(11) span is 1.0～4.5mm.
The utlity model has following advantage:
1, identical for nominal pitch, different traitorous apart from silent chain sprocket wheel series of products of the number of teeth all can be used a universal hobboing cutter processing, fully implemented cutter generalization principle.
2, the hobboing cutter basic tooth profile parameter that the utility model proposes also is traitorous basic tooth profile parameter apart from silent chain sprocket wheel rack type cutter and plate-like pinion cutter.
3, owing to switch political loyalty apart from the basic tooth profile of silent chain sprocket hob, only tooth profile parameter is different with involute gear cutter basic tooth profile, and therefore, it is identical apart from the processing of the process technology of silent chain sprocket wheel and involute gear to switch political loyalty.
4, since hobboing cutter the tooth root circular arc---straight line profile of tooth (3) also is a cutting edge, use this hobboing cutter to add man-hour, can guarantee sprocket apical tooth shape (18) and its flank involute profile (19) to have identical coaxial accuracy.
5, known hobboing cutter basic tooth profile parameter is then switched political loyalty apart from the tooth Shape Design parameter of silent chain sprocket wheel series of products, and is also definite.
Description of drawings:
Fig. 1 is for switching political loyalty apart from the basic tooth profile schematic diagram of silent chain sprocket hob.Wherein:
1 is flank straight line profile of tooth; 2 is the tooth top circular arc---the straight line profile of tooth; 3 is the tooth root circular arc---the straight line profile of tooth; 4 is the profile of tooth center line; 5 is tooth pitch; 6 is transverse tooth thickness; 7 is tooth depth; 8 is height of teeth top; 9 is profile angle; 10 is the tooth top arc radius; 11 is fillet radius.
Fig. 2 is for switching political loyalty apart from silent chain carrier bar schematic diagram.Wherein:
V is the plate hole center; 12 is hole heart distance; 13 is working face; 14 is the working face size; 15 is working face angle (60 °).
Fig. 3 is for switching political loyalty apart from silent chain sprocket wheel schematic diagram.Wherein:
16 is the gear teeth; 17 is teeth groove; 18 is the tooth top profile of tooth; 19 is the flank involute profile; 20 is the tooth root profile of tooth; 21 is reference circle; 22 is outside circle; 23 is root circle; 24 is reference diameter; 25 is tip diameter; 26 is root diameter; K is a flank involute profile initial point; H is a flank involute profile terminal point; 0 is centre of sprocket.
Fig. 4 locatees schematic diagram for switching political loyalty after silent chain carrier bar and sprocket wheel enclose chain, also be simultaneously the generate relation principle figure of hobboing cutter basic tooth profile (plane tooth bar) and sprocket wheel.Wherein:
V is the plate hole center; 27 is carrier bar; 13 is the carrier bar working face, also is hobboing cutter basic tooth profile flank straight line profile of tooth (1) simultaneously; 30 is hobboing cutter basic tooth profile nodel line; 31 is the sprocket wheel pitch circle; 32 is setting circle; 33 is the sprocket wheel basic circle; 21 is the sprocket wheel reference circle; 35 is the sprocket wheel pitch diameter; 24 is the sprocket wheel reference diameter; 37 is the sprocket wheel base circle diameter (BCD); 38 is the setting circle diameter; 39 is the pressure angle that sprocket wheel flank involute is ordered at C; 40 is orientation angle; P is a working pitch point; C is the contact point of carrier bar working face and sprocket wheel flank involute profile; K is the initial point of sprocket wheel flank involute profile; H is a flank involute profile terminal point; 0 is centre of sprocket; 42 is location dimension; 43 is sprocket wheel setting circle transverse tooth thickness; 44 is the sprocket wheel thickness on pitch circle.
Embodiment:
Below with processing nominal pitch P=38.1(mm) traitorous be example apart from the silent chain sprocket wheel, the relevant data that how provides according to Mo Si company sample is described, the theoretical calculation formula of deriving by the utility model is determined traitorous apart from silent chain sprocket hob basic tooth profile parameter.
1, initial data
P＝38.1mm
f＝14.95mm
Z
1＝20
Z
2＝39
2, the data of tabling look-up
（mm）
Z
1Z
2
d
n244.7798 475.7674
d
e240.0808 472.5416
d
f192.2808 424.7416
3, the following basic tooth profile parameter data that can directly provide according to sample provide.
Symbolic result (mm)
t
038.1
S
019.05
h
023.9
4, determine h
Calculation procedure and result
5, following basic tooth profile parameter, can choose by experience:
r
10＝3.5mm
r
20＝2.5mm
6, other structural parameters of this hobboing cutter can design with reference to involute gear hob.
7, the manufacturing technology condition of this hobboing cutter can be formulated with reference to gear general technical specifications (GB6084-85).
Claims (4)
1, a kind of by cutter hub and cutter tooth form traitorous apart from the silent chain sprocket hob, it is characterized in that: the basic tooth profile of this hobboing cutter is made up of flank straight line profile of tooth (1), tooth top circular arc-straight line profile of tooth (2) and tooth root circular arc-straight line profile of tooth (3); This hobboing cutter basic tooth profile parameter: tooth pitch t
0(5), profile angle α
0(9), transverse tooth thickness S
0(6), tooth depth h
0(7), height of teeth top h
0(8), radius at tooth tip r
10(10) and tooth fillet radius r
10(11), only relevant with processed sprocket wheel nominal pitch P, irrelevant with its tooth number Z; This hobboing cutter tooth root circular arc-straight line profile of tooth (3) also is a cutting edge; This hobboing cutter basic tooth profile parameter also is simultaneously traitorous basic tooth profile parameter apart from silent chain sprocket wheel rack type cutter and plate-like pinion cutter.
2, described traitorous by claim 1 apart from the silent chain sprocket hob, it is characterized in that: this hobboing cutter basic tooth profile parameter: tooth pitch t
8(5), profile angle α
8(9), transverse tooth thickness S
0(6) and tooth depth h
0(7), be calculated as follows respectively:
t
0＝P
α
0＝30°
S
0＝0.5P
h
0＝0.5（d
e－d
f）
3, described traitorous by claim 1 apart from the silent chain sprocket hob, it is characterized in that: this hobboing cutter basic tooth profile parameter: height of teeth top h
(8), calculate by following theoretical formula:
PC＝（f＋0.5P COS30°）－（0.5d
COS (π)/(Z) －0.5d
8）sin30°
S
C＝ (2d
cπ)/(Z) －d
Cγ
X＝－（ (0.5P－S)/(2tg30°) ）
h
＝0.5（d
e－d
f）＋X
4, described traitorous by claim 1 apart from the silent chain sprocket hob, it is characterized in that: this hobboing cutter basic tooth profile parameter: radius at tooth tip r
10(10) and tooth fillet radius r
10(11), its span is 1.0～4.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226376 CN2129194Y (en) | 1992-06-29 | 1992-06-29 | Variable pitch tooth-shaped chain sprocket hob |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226376 CN2129194Y (en) | 1992-06-29 | 1992-06-29 | Variable pitch tooth-shaped chain sprocket hob |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2129194Y true CN2129194Y (en) | 1993-04-07 |
Family
ID=33770695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92226376 Expired - Fee Related CN2129194Y (en) | 1992-06-29 | 1992-06-29 | Variable pitch tooth-shaped chain sprocket hob |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2129194Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335815C (en) * | 2004-09-15 | 2007-09-05 | 山东大学 | Unequal pitch high speed transmission gear chain and chain wheel |
| CN101015872B (en) * | 2006-02-08 | 2010-12-15 | 黄世发 | Hobbing-cutter gear form capable of solving 'undercut' problem of Z<17 involute gear |
| CN101344160B (en) * | 2007-07-11 | 2011-06-08 | 闵德仁 | Chain sprocket wheel with variable pitch |
| CN103056456A (en) * | 2011-10-24 | 2013-04-24 | 王乐琳 | Electric bicycle double-circular-arc-tooth-shaped harmonic gear hobbing cutter |
-
1992
- 1992-06-29 CN CN 92226376 patent/CN2129194Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100335815C (en) * | 2004-09-15 | 2007-09-05 | 山东大学 | Unequal pitch high speed transmission gear chain and chain wheel |
| CN101015872B (en) * | 2006-02-08 | 2010-12-15 | 黄世发 | Hobbing-cutter gear form capable of solving 'undercut' problem of Z<17 involute gear |
| CN101344160B (en) * | 2007-07-11 | 2011-06-08 | 闵德仁 | Chain sprocket wheel with variable pitch |
| CN103056456A (en) * | 2011-10-24 | 2013-04-24 | 王乐琳 | Electric bicycle double-circular-arc-tooth-shaped harmonic gear hobbing cutter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101774048B (en) | Bevel gear machining method | |
| CN102151909B (en) | Large-scale numerical control gear machining machine tool | |
| CN101033788A (en) | Worm reducer and electric power steering apparatus | |
| CN1036290C (en) | Engagement type rotor | |
| CN2129194Y (en) | Variable pitch tooth-shaped chain sprocket hob | |
| CN203738162U (en) | Biarc correction cycloid gear hob | |
| CN1781637A (en) | Method for shaping gear shaver | |
| CA2430004C (en) | Rotary positive-displacement pump with meshing gear wheels without encapsulation, and gear wheel for such a positive-displacement pump | |
| CN2698505Y (en) | Oblique gear bilateral chamfering tool | |
| CN203477198U (en) | High tooth form harmonic reducer | |
| CN103447628A (en) | Numerical control hobbing method for five-axis linkage oblique tooth non-circular gear | |
| CN2300468Y (en) | Step cutting type high effect gear hobbing cutter | |
| CN1018341B (en) | Circular arc gear hob | |
| CN110977054A (en) | Machining and manufacturing method of gear rack gear shaping with variable transmission ratio | |
| CN2753496Y (en) | Universal helical gear shaping machine | |
| CN86200498U (en) | Involute planetary reducing gears with small difference in teeth | |
| CN104625244A (en) | Cutter for machining spiral arc face enveloping worm | |
| CN2238695Y (en) | Sprocket hob | |
| CN1224787C (en) | Fish-shaped gear and infinitely gearbox for bicycle | |
| CN2214860Y (en) | Device of making flexible gear tooth | |
| CN1045446A (en) | Large-diameter oil culvert worm gear pair | |
| CN205078732U (en) | Powder metallurgical gear | |
| CN201913326U (en) | Sprocket hob | |
| CN202479622U (en) | Disk-shaped slotting cutter | |
| CN103148194A (en) | Plastic gearwheel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |