CN104766529A - Gear drive type gear meshing instrument without pressure angle - Google Patents
Gear drive type gear meshing instrument without pressure angle Download PDFInfo
- Publication number
- CN104766529A CN104766529A CN201510169954.XA CN201510169954A CN104766529A CN 104766529 A CN104766529 A CN 104766529A CN 201510169954 A CN201510169954 A CN 201510169954A CN 104766529 A CN104766529 A CN 104766529A
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- CN
- China
- Prior art keywords
- gear
- pressure angle
- tooth bar
- teeth
- zero
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- 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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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention discloses a gear drive type gear meshing instrument without a pressure angle. The gear drive type gear meshing instrument is composed of a zero pressure angle simulation rack slotting tool, a fifth gear, a fourth gear, a third gear, a second gear, a first gear, a bottom plate, a supporting paper round disc and a connecting ring, wherein the first gear on a first shaft can be directly meshed with the fifth gear for transmission; or the first gear on the first shaft is not directly meshed with the fifth gear, instead, through the transmission of a series of gears, the first gear and the second gear are meshed, the second gear and the third gear can realize coaxial corotation, and the third gear and the fifth gear are in mutual transmission and movement through the fourth gear; the first shaft and a second shaft can vertically slide in a groove in the bottom plate, and the correctly meshed center distance of each pair of transmission gears is guaranteed; the transmission ratio of the first gear and the fifth gear is changed; the first gear, the second gear and the third gear can be rapidly replaced with gears with different gear numbers, and by adjusting the distance between two tool teeth, the involute gear outlines with different modulus can be drawn.
Description
Technical field
The present invention relates to a kind of instruments used for education, particularly a kind of gearing type gear model for demonstration purpose of zero-pressure angle.
Background technology
Gear model for demonstration purpose at present for imparting knowledge to students passes through gear and the tooth bar engaged transmission of the fixing number of teeth, forms rolling movement, usually can only do a kind of gears generating experiment of reference diameter.When needing simulating cutting difference gear, need to change simulation rack cutter.
Summary of the invention
Fundamental purpose of the present invention is to solve the problem, and provides a kind of gearing type gear model for demonstration purpose can drawing the involute profile of the different number of teeth, modulus and non-standard pressure angle.
The present invention simulates tooth bar slotting tool by zero-pressure angle, 5th gear (tooth bar), 4th gear, 3rd gear, second gear, first gear, base plate, tray paper disk and coupling ring composition, first axle is fixed on base plate, its position can adjust up and down as required in groove, first gear and coupling ring are fixed together and are set on the first axle, sheathed bearing between coupling ring and the first axle, the sheathed fixing tray paper disk in card periphery of coupling ring, the column of coupling ring has external thread, sheathed platen dish on coupling ring also screws with knob, 3rd gear is positioned on the second gear, 3rd gear and the second gear are articulated on base plate with the second axle, 3rd gear and the second gear are fixed together, 4th gear is articulated on base plate with the 3rd axle, first gear is together with the second gears meshing, 3rd gear is together with the 4th gears meshing, base plate offers dovetail groove, ram is slidably installed in dovetail groove, ram is fixed the 5th gear (tooth bar), zero-pressure angle simulation tooth bar slotting tool is fixed on tooth bar by self chute and set nut, 4th wheel and rack meshes together.
Described base plate offers groove, and the first axle and the second axle wear and are fixed in the groove of base plate, and the first axle and the second axle can move up and down in the groove of base plate, and the 3rd axle is fixed on base plate.
Base plate has circular hole and spring is housed and steel ball forms spring-loaded plunger, the edge of ram has bar tooth, the steel ball of spring-loaded plunger and the bar tooth contact at ram edge, spring-loaded plunger position ensures that steel ball can contact with ram always, thus when making tooth bar move a protrusion distance, steel ball is arranged in bar tooth, locates, ram evenly to draw profile of tooth.
The course of work of the present invention and principle are:
When the present invention uses, first adjust zero-pressure angle simulation tooth bar slotting tool according to the modulus and pressure angle that will describe involute profile gear.Calculating according to base tangent length:
and rounding is to nearest integer.
K---institute is across the number of teeth;
W
k---common normal nominal length;
α---be the pressure angle of processed gear;
Z
x---be the gear number of teeth;
Distance between heteropleural two tooth of adjustment zero-pressure angle simulation tooth bar slotting tool, makes its value be W
k.Then the middle transmission gear number of teeth is selected according to the number of teeth of processed gear, as the number of teeth of the first gear, the second gear and the 3rd gear, the middle transmission gear number of teeth, the first gear, relation between the second gear and the number of teeth of the 3rd gear, drawn by following formula:
M
x, z
x---be respectively modulus and the number of teeth of processed gear;
M---is the modulus of the first gear, the second gear, the 3rd gear, the 4th gear, the 5th gear (tooth bar);
Z
1---be the number of teeth of the first gear.
Can be calculated the gear ratio of the second gear and the 3rd gear, in the middle of the equipment gear provided, select the first gear, the second gear and the 3rd gear according to this gear ratio.Second gear and the 3rd gear are installed on the second axle and realize coaxial corotation, the position adjusting the first axle ensures on the first gear and the second gears meshing, on the 3rd gear and the 4th gears meshing, in the 4th gear and the 5th gear (tooth bar) engagement.Unclamp set nut and knob, pick up platen dish, wheel uncoated paper is placed on below simulation tooth bar slotting tool, puts platen dish, then screw on knob contact roller uncoated paper.Adjustment zero-pressure angle simulation tooth bar slotting tool, zero-pressure angle is simulated reference radius that tooth bar slotting tool reticule and the distance of the wheel blank centre of gyration are drawn gear, now zero-pressure angle simulate tooth bar slotting tool center line and wheel blank reference circle tangent.Zero-pressure angle is simulated tooth bar slotting tool and move to the position starting to engage, promote simulation tooth bar slotting tool or rotate tray paper disk, just can start the involute profile drawing gear, describe the profile of simulation tooth bar slotting tool blade with pencil along blade.
If the first direct geared and the 5th meshed transmission gear, following formula draws the first gear number of teeth:
m
xz
x＝m
1z
1
M
x, z
x---be respectively modulus and the number of teeth of processed gear;
M
1z
1modulus and the number of teeth of----be the first gear.
Modulus and the number of teeth of the first gear is selected according to the modulus of processed gear and the number of teeth, even if the reference diameter of the first gear is equal with the reference diameter of processed gear, the position adjusting the first axle ensures in the first gear and the 5th gear (tooth bar) engagement.Repeat said process, describe the profile of simulation tooth bar slotting tool blade with pencil along blade.
The distance of answering re-adjustments to simulate tooth bar slotting tool reticule and the wheel blank centre of gyration can describe the involute profile of normal shift and negative addendum modification.
Beneficial effect of the present invention:
1, the distance between two cutters tooth can regulate, and depicts the involute gear tooth profile of different modulus.
2, the principle of roll flute processing in gear working method can be simulated, understand a pair involute gear theory of engagement better.
3, the process that the modulus of the first gear and the number of teeth can simulate multiple gear is only changed, convenient and swift.
Accompanying drawing explanation
Fig. 1 is first embodiment of the present invention front view.
Fig. 2 is first embodiment of the present invention cut-open view.
Fig. 3 is the enlarged diagram at A place in Fig. 2.
Fig. 4 is the first axle enlarged diagram of the present invention.
Fig. 5 is the second axle enlarged diagram of the present invention.
Fig. 6 the 3rd axle enlarged diagram of the present invention.
Fig. 7 is second embodiment of the present invention front view.
Fig. 8 is first embodiment of the present invention cut-open view.
Embodiment
First embodiment of the present invention working method: the first gear 6 to be engaged with the 5th gear 2 by the second gear 5, the 3rd gear 4, the 4th gear 3 and realizes transmission.
Second embodiment of the present invention working method: the first gear 6 directly engages with the 5th gear 2 and realizes transmission.
Refer to shown in Fig. 1 and Fig. 2, first embodiment simulates tooth bar slotting tool 17 by zero-pressure angle, 5th gear (tooth bar) 2, 4th gear 3, 3rd gear 4, second gear 5, first gear 6, base plate 8, tray paper disk 9 and coupling ring 12 form, first axle 13 is fixed on base plate 8, first gear 6 and coupling ring 12 are fixed together and are set on the first axle 13, sheathed bearing 14 between coupling ring 12 and the first axle 13, the sheathed fixing tray paper disk 9 in card periphery of coupling ring 12, the column of coupling ring 12 has external thread, sheathed platen dish 10 on coupling ring 12 also screws with knob 11, 3rd gear 4 is positioned on the second gear 5, 3rd gear 4 and the second gear 5 are articulated on base plate 8 with the second axle 15, 3rd gear 4 and the second gear 5 are fixed together, 4th gear 3 is articulated on base plate 8 with the 3rd axle 16, first gear 6 and the second gear 5 mesh together, 3rd gear 4 and the 4th gear 3 mesh together, base plate 8 offers dovetail groove 18, ram 19 is slidably installed in dovetail groove 18, ram 19 is fixed the 5th gear (tooth bar) 2, simulation tooth bar slotting tool 17 is fixed on the 5th gear (tooth bar) 2 by self chute 20 and set nut 1, 4th gear 3 and the 5th gear (tooth bar) 2 mesh together.
Described base plate 8 offers groove 7, and the first axle 13 and the second axle 15 wear and are fixed in the groove 7 of base plate 8, and the first axle 13 and the second axle 15 can move up and down in the groove 7 of base plate 8, and the 3rd axle 16 is fixed on base plate 8.
Refer to Fig. 7 and Fig. 8, second embodiment is fixed on base plate 8 by the first axle 13, first gear 6 and coupling ring 12 are fixed together and are set on the first axle 13, sheathed bearing 14 between coupling ring 12 and the first axle 13, the sheathed fixing tray paper disk 9 in card periphery of coupling ring 12, the column of coupling ring 12 has external thread, sheathed platen dish 10 on coupling ring 12 also screws with knob 11, first gear 6 and the 5th gear (tooth bar) 2 mesh together, and simulation tooth bar slotting tool 17 is fixed on the 5th gear (tooth bar) 2 by self chute 20 and set nut 1.
As shown in Figures 2 and 3, base plate 8 has circular hole and spring 81 is housed and forms spring-loaded plunger with steel ball 82, the edge of ram 19 has bar tooth, the steel ball 82 of spring-loaded plunger and the bar tooth contact at ram 19 edge, spring-loaded plunger position ensures that steel ball 82 can contact with ram 19 always, thus when making the 5th gear (tooth bar) 2 move a protrusion distance, steel ball 82 is arranged in bar tooth, ram 19 is located, evenly to draw profile of tooth.
Inventive point of the present invention is:
1, the first gear 6 on the first axle 13 does not directly engage with tooth bar 2, but by a series of gear drive, such as: be contained in the first gear 6 on the first axle 13 and the second gear 5 engages, second gear 5 and the 3rd gear 4 can realize coaxial corotation, and the 3rd gear 4 transmits motion mutually through the 4th gear 3 and the 5th gear (tooth bar) 2.
2, the first axle 13 and the second axle 15 wear and are fixed in the groove 7 of base plate 8, and the first axle 13 and the second axle 15 can move up and down in the groove 7 of base plate 8, and the 3rd axle 16 is fixed on base plate 8.
3, on tray paper disk 9, coupling ring 12 and the first gear 6 be fixed together, and rotates around the first axle 13 with identical angular velocity.
4, the pressure angle of zero-pressure angle simulation tooth bar slotting tool 17 is 0 °.
5, the first gear directly engages with the 5th gear (tooth bar), and adjustment is quick.
The course of work and the principle of the first embodiment are:
When the present invention uses, first adjust zero-pressure angle simulation tooth bar slotting tool 17 according to the modulus and pressure angle that will describe involute profile gear.According to a pair involute gear correct engagement condition:
and rounding is to nearest integer.
K---institute is across the number of teeth;
W
k---common normal nominal length;
α---be the pressure angle of processed gear;
Z
x---be the number of teeth of processed gear;
Distance between homonymy two tooth of adjustment zero-pressure angle simulation tooth bar slotting tool, makes its value be W
k.According to the first scheme, then select the middle transmission gear number of teeth according to the number of teeth of processed gear, as the number of teeth of the first gear 6, second gear 5 and the 3rd gear 4, the middle transmission gear number of teeth, as the relation between the first gear 6, second gear 5 and the number of teeth of the 3rd gear 4, drawn by following formula:
M
x, z
x---be respectively modulus and the number of teeth of processed gear;
M---is the modulus of the first gear 6, second gear 5, the 3rd gear 4, the 4th gear 3, the 5th gear (tooth bar) 2;
Z
1---be the number of teeth of the first gear 6.
Can be calculated the gear ratio of the second gear 5 and the 3rd gear 4, in the middle of the equipment gear provided, select the first gear 6, second gear 5 and the 3rd gear 4 according to this gear ratio.Second gear 5 and the 3rd gear 4 are installed on the second axle 15 and realize coaxial corotation, the position adjusting the first axle 13 ensures in the first gear 6 and the engagement of the second gear 5,3rd gear 4 and the 4th gear 3 engage, and the 4th gear 3 and the 5th gear (tooth bar) 2 engage.Unclamp set nut 1 and knob 11, pick up platen dish 10, drawing is placed on below simulation tooth bar slotting tool 17, puts platen dish 10, then screw on knob 11 and compress drawing.Adjustment simulation tooth bar slotting tool 17, makes the distance of simulation tooth bar slotting tool 17 reticule and the wheel blank centre of gyration be the reference radius of drawn gear, now simulation tooth bar slotting tool 17 center line and wheel blank reference circle tangent.Simulation tooth bar slotting tool 17 is moved to the position starting to engage, then promote simulation tooth bar slotting tool 17 or rotate tray paper disk 9, simulate tooth bar slotting tool 17 1 segment distance to the right or left at every turn, such as 3 ~ 5mm, spring-loaded plunger is stuck between ram 19 two teeth, starts the tooth curve drawing analogsimulation tooth bar slotting tool 17 along simulation tooth bar slotting tool 17 edge, draws a cutter tooth-profile curve, a mobile ram 19, until draw 2 ~ 3 complete flank profils.The envelope of these flank profils is the flank profil of standard involute gear.
The course of work and the principle of the second embodiment are:
Modulus and the number of teeth of the first gear is selected according to the modulus of processed gear and the number of teeth, make the reference diameter of the first gear equal with the reference diameter of processed gear, the position adjusting the first axle ensures in the first gear and the 5th gear (tooth bar) engagement.
m
xz
x＝m
1z
1
M
x, z
x---be respectively modulus and the number of teeth of processed gear;
M
1z
1modulus and the number of teeth of----be the first gear.
First axle 13 is fixed on base plate 8, first gear 6 and coupling ring 12 are fixed together and are set on the first axle 13, sheathed bearing 14 between coupling ring 12 and the first axle 13, the sheathed fixing tray paper disk 9 in card periphery of coupling ring 12, the column of coupling ring 12 has external thread, sheathed platen dish 10 on coupling ring 12 also screws with knob 11, first gear 6 and the 5th gear (tooth bar) 2 mesh together, and simulation tooth bar slotting tool 17 is fixed on the 5th gear (tooth bar) 2 by self chute 20 and set nut 1.Repeat the drawing step of the first scheme, the envelope drawing flank profil is the flank profil of standard involute gear.
If desired when cutting goes out X-gear, unclamp set nut 1, according to described by the requirement of cutting gear side potential coefficient, the position of adjustment zero-pressure angle simulation tooth bar slotting tool 17, screws set nut 1, promotes zero-pressure angle simulation tooth bar slotting tool 17 or rotates tray paper disk 9, the profile of zero-pressure angle simulation tooth bar slotting tool 17 blade is drawn with pencil, finally depict involute gear tooth profile, then according to calculating the size of point circle and root diameter, draw dedendum circle and point circle.
Claims (3)
1. the gearing type gear model for demonstration purpose of a zero-pressure angle, it is characterized in that: be by zero-pressure angle tooth bar slotting tool (17), 5th gear (tooth bar) (2), 4th gear (3), 3rd gear (4), second gear (5), first gear (6), base plate (8), tray paper disk (9) and coupling ring (12) composition, first gear (6) is by the second gear teeth (5), 3rd gear (4) and the 4th gear (3) pass motion to the 5th gear (2), or the first gear (6) directly engages with the 5th gear (2), the more number of teeth of gear changing, the involute gear tooth profile of the different number of teeth can be depicted, by regulating the distance between two cutters tooth, the involute gear tooth profile of different modulus can be depicted.
2. the gearing type gear model for demonstration purpose of a kind of zero-pressure angle according to claim 1, is characterized in that: described zero-pressure angle tooth bar slotting tool (17) to be pressure angle the be simulation rack cutter cutter of 0 °.
3. the gearing type gear model for demonstration purpose of a kind of zero-pressure angle according to claim 1, it is characterized in that: the circular pitch of described zero-pressure angle tooth bar slotting tool (17) is adjustable, by regulating the distance between two cutters tooth, depict the involute gear tooth profile of different pressures angle or different modulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510169954.XA CN104766529A (en) | 2015-04-12 | 2015-04-12 | Gear drive type gear meshing instrument without pressure angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510169954.XA CN104766529A (en) | 2015-04-12 | 2015-04-12 | Gear drive type gear meshing instrument without pressure angle |
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| Publication Number | Publication Date |
|---|---|
| CN104766529A true CN104766529A (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510169954.XA Pending CN104766529A (en) | 2015-04-12 | 2015-04-12 | Gear drive type gear meshing instrument without pressure angle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131379A (en) * | 2019-06-05 | 2019-08-16 | 儒拉玛特自动化技术(苏州)有限公司 | A kind of rotary motion driving device |
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| CN110131379A (en) * | 2019-06-05 | 2019-08-16 | 儒拉玛特自动化技术(苏州)有限公司 | A kind of rotary motion driving device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150708 |
|
| RJ01 | Rejection of invention patent application after publication |