CN103742616A - Single-groove grooved wheel mechanism used for teaching demonstration - Google Patents
Single-groove grooved wheel mechanism used for teaching demonstration Download PDFInfo
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- CN103742616A CN103742616A CN201410019122.5A CN201410019122A CN103742616A CN 103742616 A CN103742616 A CN 103742616A CN 201410019122 A CN201410019122 A CN 201410019122A CN 103742616 A CN103742616 A CN 103742616A
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- sheave
- pin
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
- F16H27/04—Step-by-step mechanisms without freewheel members, e.g. Geneva drives for converting continuous rotation into a step-by-step rotary movement
- F16H27/06—Mechanisms with driving pins in driven slots, e.g. Geneva drives
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Abstract
The invention relates to a single-groove grooved wheel mechanism used for teaching demonstration. The single-groove grooved wheel mechanism comprises a grooved wheel, a connecting rod mechanism, pin shafts and a mechanism frame. Average transmission ratio of a teaching aid is 1:1, and intermittent transmission of the grooved wheel can be realized; an existing teaching tool can realize the function of intermittent transmission through mechanism combining, but the single-groove grooved wheel mechanism is more simpler and more reliable comparatively; the single-groove grooved wheel can be realized through a method of changing groove shape and changing motion form of a cylindrical pin, so that limitation of an original mechanism is broken through, and the single-groove grooved wheel is more simplified; a sample machine of the single-groove grooved wheel can be used as a teaching demonstration tool related to the grooved wheel in a mechanical principle course, and the the single-groove grooved wheel can be further studied and then popularized in work application. The single-groove grooved wheel mechanism has the advantages of being convenient to operate, convenient for demonstration and the like.
Description
Technical field
The present invention relates to a kind of single groove Geneva mechanism, belong to teaching demonstration apparatus field, relate in particular to a kind of single groove Geneva mechanism for teaching demonstration.
Background technique
The intermittent motion mechanism that Geneva mechanism is comprised of sheave and straight pin, claims again Maltese cross.It is often used to by the continuous rotation of driving link convert to driven member with the unidirectional periodic rotary of resting.Geneva mechanism has outer gearing and interior engagement and sphere sheave etc.The sheave of Sheave Device with the External Gear and pivoted arm switched in opposite, interior engagement is identical, and sphere sheave can carry out intermittently-driving between two concurrent aceses.
Geneva mechanism has outer gearing and two kinds of forms of interior engagement.The sheave of Sheave Device with the External Gear and pivoted arm switched in opposite, interior engagement is identical.Single armed Sheave Device with the External Gear is comprised of the pivoted arm with straight pin, the sheave with four radial grooves and frame.When the straight pin on the pivoted arm of continuous rotation enters radial groove, stir sheave turn over 2 toot 2 jiaos; When straight pin produces after radial groove, sheave stops operating.Pivoted arm circles, sheave complete once turning stop transport moving.In order to guarantee that sheave rests, can be on pivoted arm an affixed cutaway disk, the recessed periphery on its circle edge and sheave matches.Like this, neither affect pivoted arm and rotate, can pin sheave again motionless.Moving for turning of sheave energy execution cycle property stopped transport, the radial groove number on sheave can not be less than 3.For fear of impact, straight pin should be tangentially into and out of sheave, and radial groove and pivoted arm are orthogonal at this instantaneous position.When meeting requiring of stopping between difference, can adopt multi-arm and Geneva mechanism asymmetric groove.Geneva mechanism be generally applied in rotating speed not high, require to turn over off and in the indexing mechanism of several angle, as in the cutter indexing mechanism on turret lathe, cine projector in order to intermittent movement film etc.
Existing sheave groove number is at least 3, and kinematic coefficient is coincidence formula also: k=td/t=1/2-1/z is due to k>0, therefore groove is counted z >=3; Again because of k<0.5, therefore the run duration of the sheave of single cotter way wheel mechanism is always less than its quiescent time.If sheave groove number can be less than 3 and break through original moving stop than restriction, sheave will have more wide utilization space, as realizes the different moving different job requirements (k can equal to be even greater than 0.5) that stop recently adapting to.
Summary of the invention
The object of the present invention is to provide a kind of single groove Geneva mechanism for teaching demonstration, by the cooperation of sheave and slidercrank mechanism, design a kind of single groove sheave, the research of traditional sheave and other indexing mechanism is expanded and deepened to this list groove Geneva mechanism, and aspect the classroom teaching of Machine Design, Der Grundsatz der Maschinen, be also a kind of well teaching aid, it is to promoting the application of Geneva mechanism in actual production, has boundless perspective.
For achieving the above object, the technical solution used in the present invention is a kind of single groove Geneva mechanism for teaching demonstration, and this mechanism comprises sheave, linkage mechanism, bearing pin, mechanism rack.
Particularly, sheave comprises sheave kingpin hole, sheave arc notch, sheave groove; Linkage mechanism comprises driving lever, follower lever, throw-out lever; Bearing pin comprises bearing pin a, bearing pin b, bearing pin c; Mechanism rack comprises mechanism rack pin-and-hole a, mechanism rack pin-and-hole b, mechanism rack groove; Driving lever two ends are respectively equipped with driving lever pin-and-hole a, driving lever pin-and-hole b; Follower lever two ends are respectively equipped with follower lever pin-and-hole, straight pin; Throw-out lever one end is provided with throw-out lever pin-and-hole, and the other end is arc and mates with sheave arc notch; Sheave kingpin hole, mechanism rack pin-and-hole b are connected to sheave in mechanism rack by bearing pin b; Driving lever pin-and-hole a, mechanism rack pin-and-hole a, throw-out lever pin-and-hole are connected to driving lever, throw-out lever in mechanism rack by bearing pin a; Driving lever pin-and-hole b, follower lever pin-and-hole link together driving lever, follower lever by bearing pin c; Straight pin on follower lever and sheave groove, mechanism rack groove match.
During this list groove Geneva mechanism motion, the arc tips of throw-out lever does not contact with the sheave arc notch of sheave, and now whole mechanism is working state; Driving lever is driven centered by bearing pin a and is circled by driving mechanism, and follower lever is driven by driving lever by bearing pin c; The straight pin of follower lever drives sheave to circle centered by bearing pin b in sheave groove; When sheave moves to sheave groove and is connected with mechanism rack groove, the straight pin access mechanism frame groove of follower lever, now straight pin moving linearly in mechanism rack groove; Driving lever continues to drive follower lever motion, and now straight pin returns in sheave groove along mechanism rack groove; Then drive sheave to continue to circle, so far complete the circular movement at once intermittence of sheave.
When the arc tips of throw-out lever and the sheave arc notch of sheave contact, sheave can not move, and now whole mechanism is lock state.
The length of described mechanism rack groove be more than or equal to driving lever+follower lever-(mechanism rack pin-and-hole a-mechanism rack pin-and-hole b)-sheave radius.
Throw-out lever can or circle centered by bearing pin a with driving lever for free movable part.
Described driving mechanism can be manual or motor drives.
Described mechanism rack groove can be skewed slot, and now mechanism only has unidirectional movement characteristic.
Compared with prior art, the present invention has following beneficial effect.
1, the average ratios of this teaching aid is 1:1, can realize the intermittently-driving of sheave simultaneously.
2, in the past also can realize this function by Mechanism Combination, but this mechanism is more simple and reliable by contrast; Single groove sheave can be realized by the method for the forms of motion of modification grooved, change straight pin, and the restriction that this has broken through original mechanism, more simplifies it.
3, the model machine of this list groove sheave, can be used as the demonstration teaching aid about sheave in mechanical principle course, also can be for further study to single groove sheave, and then promote in work is used, have easy to operate, be convenient to the advantages such as demonstration.
Accompanying drawing explanation
Fig. 1 is the motion structure schematic diagram of single groove Geneva mechanism.
Fig. 2 is the structural drawing of sheave.
Fig. 3 is the plan view of driving lever.
Fig. 4 is the sectional view of driving lever.
Fig. 5 is the sectional view of follower lever.
Fig. 6 is the sectional view of throw-out lever.
Fig. 7 is the plan view of throw-out lever.
Fig. 8 is the plan view of mechanism rack.
Fig. 9 .1 is movement position I schematic diagram.
Fig. 9 .2 is movement position II schematic diagram.
Fig. 9 .3 is movement position III schematic diagram.
Fig. 9 .4 is movement position IV schematic diagram.
Fig. 9 .5 is movement position V schematic diagram.
Fig. 9 .6 is throw-out lever schematic diagram.
In figure: 1, sheave, 2, driving lever, 3, follower lever, 4, throw-out lever; 5, bearing pin comprises bearing pin a, 6, bearing pin b, 7, bearing pin c; 8, mechanism rack, 1.1, sheave kingpin hole, 1.2, sheave arc notch, 1.3, sheave groove, 2.1, driving lever pin-and-hole a, 2.2, driving lever pin-and-hole b, 3.1, follower lever pin-and-hole, 3.2, straight pin, 4.1, throw-out lever pin-and-hole, 8.1, mechanism rack pin-and-hole a, 8.2, mechanism rack pin-and-hole b, 8.3, mechanism rack groove.
Embodiment
Below with reference to accompanying drawing, the invention will be further described.
As shown in Fig. 1-8, a kind of single groove Geneva mechanism for teaching demonstration, this mechanism comprises sheave 1, linkage mechanism, bearing pin, mechanism rack 8.
Particularly, sheave 1 comprises sheave kingpin hole 1.1, sheave arc notch 1.2, sheave groove 1.3; Linkage mechanism comprises driving lever 2, follower lever 3, throw-out lever 4; Bearing pin comprises bearing pin a5, bearing pin b6, bearing pin c7; Mechanism rack 8 comprises mechanism rack pin-and-hole a8.1, mechanism rack pin-and-hole b8.2, mechanism rack groove 8.3; Driving lever 2 two ends are respectively equipped with driving lever pin-and-hole a2.1, driving lever pin-and-hole b2.2; Follower lever 3 two ends are respectively equipped with follower lever pin-and-hole 3.1, straight pin 3.2; Throw-out lever 4 one end are provided with throw-out lever pin-and-hole 4.1, and the other end is arc and mates with sheave arc notch 1.2; Sheave kingpin hole 1.1, mechanism rack pin-and-hole b8.2 are connected to sheave 1 in mechanism rack 8 by bearing pin b6; Driving lever pin-and-hole a2.1, mechanism rack pin-and-hole a8.1, throw-out lever pin-and-hole 4.1 are connected to driving lever 2, throw-out lever 4 in mechanism rack 8 by bearing pin a5; Driving lever pin-and-hole b2.2, follower lever pin-and-hole 3.1 link together driving lever 2, follower lever 3 by bearing pin c7; Straight pin 3.2 on follower lever 3 matches with sheave groove 1.3, mechanism rack groove 8.3.
During this list groove Geneva mechanism motion, the arc tips of throw-out lever 4 does not contact with the sheave arc notch 1.2 of sheave 1, and now whole mechanism is working state; Driving lever 2 is driven centered by bearing pin a5 and is circled by driving mechanism, and follower lever 3 is driven by driving lever 2 by bearing pin c7; The straight pin 3.2 of follower lever 3 circles centered by bearing pin b6 at the interior driving sheave 1 of sheave groove 1.3; When sheave 1 moves to sheave groove 1.3 and is connected with mechanism rack groove 8.3, the straight pin 3.2 access mechanism frame grooves 8.3 of follower lever 3, now straight pin 3.2 is at the interior moving linearly of mechanism rack groove 8.3; Driving lever 2 continues to drive follower lever 3 to move, and now straight pin 3.2 returns in sheave groove 1.3 along mechanism rack groove 8.3; Then drive sheave 1 to continue to circle, so far complete the circular movement at once intermittence of sheave 1.
When the arc tips of throw-out lever 4 and the sheave arc notch 1.2 of sheave 1 contact, sheave 1 can not move, and now whole mechanism is lock state.
The length of described mechanism rack groove 8.3 is more than or equal to driving lever+follower lever-(mechanism rack pin-and-hole a8.1-mechanism rack pin-and-hole b8.2)-sheave radius.
The center line that is arranged in bearing pin a5, bearing pin b6 in frame 8 and mechanism rack groove 8.3 is in alignment; This device has bidirectional-movement characteristic simultaneously.
Throw-out lever 4 can or circle centered by bearing pin a5 with driving lever 2 for free movable part.
Described driving mechanism can be manual or motor drives.
As shown in Fig. 9 .1-9.5, be respectively movement position I of the present invention, movement position II, movement position III, movement position IV, movement position V schematic diagram, driving lever 2 rotates counterclockwise, drive the straight pin 3.2 on follower lever 3 to move along mechanism rack groove 8.3 at sheave groove 1.3, thereby complete the intermittent movement process of whole mechanism.
As Fig. 9 .6 is depicted as throw-out lever schematic diagram, when sheave 1 is lived in throw-out lever 4 thrusts, whole mechanism is lockable.
Described mechanism rack groove can be skewed slot, and now mechanism only has unidirectional movement characteristic.
Claims (7)
1. for a single groove Geneva mechanism for teaching demonstration, it is characterized in that: this mechanism comprises sheave (1), linkage mechanism, bearing pin, mechanism rack (8);
Particularly, sheave (1) comprises sheave kingpin hole (1.1), sheave arc notch (1.2), sheave groove (1.3); Linkage mechanism comprises driving lever (2), follower lever (3), throw-out lever (4); Bearing pin comprises bearing pin a(5), bearing pin b(6), bearing pin c(7); Mechanism rack (8) comprises mechanism rack pin-and-hole a(8.1), mechanism rack pin-and-hole b(8.2), mechanism rack groove (8.3); Driving lever (2) two ends are respectively equipped with driving lever pin-and-hole a(2.1), driving lever pin-and-hole b(2.2); Follower lever (3) two ends are respectively equipped with follower lever pin-and-hole (3.1), straight pin (3.2); Throw-out lever (4) one end is provided with throw-out lever pin-and-hole (4.1), and the other end is arc and mates with sheave arc notch (1.2); Sheave kingpin hole (1.1), mechanism rack pin-and-hole b(8.2) by bearing pin b(6) sheave (1) is connected in mechanism rack (8); Driving lever pin-and-hole a(2.1), mechanism rack pin-and-hole a(8.1), throw-out lever pin-and-hole (4.1) is by bearing pin a(5) driving lever (2), throw-out lever (4) are connected in mechanism rack (8); Driving lever pin-and-hole b(2.2), follower lever pin-and-hole (3.1) is by bearing pin c(7) driving lever (2), follower lever (3) are linked together; Straight pin (3.2) on follower lever (3) matches with sheave groove (1.3), mechanism rack groove (8.3);
During this list groove Geneva mechanism motion, the arc tips of throw-out lever (4) does not contact with the sheave arc notch (1.2) of sheave (1), and now whole mechanism is working state; Driving lever (2) is driven by bearing pin a(5 by driving mechanism) centered by circle, follower lever (3) is by bearing pin c(7) by driving lever (2), driven; The straight pin (3.2) of follower lever (3) drives sheave (1) by bearing pin b(6 in sheave groove (1.3)) centered by circle; When sheave (1) moves to sheave groove (1.3) and is connected with mechanism rack groove (8.3), straight pin (3.2) the access mechanism frame groove (8.3) of follower lever (3), now straight pin (3.2) moving linearly in mechanism rack groove (8.3); Driving lever (2) continues to drive follower lever (3) motion, and now straight pin (3.2) returns in sheave groove (1.3) along mechanism rack groove (8.3); Then drive sheave (1) to continue to circle, so far complete the circular movement at once intermittence of sheave (1).
2. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, it is characterized in that: when the arc tips of throw-out lever (4) and the sheave arc notch (1.2) of sheave (1) contact, sheave (1) can not move, and now whole mechanism is lock state.
3. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, is characterized in that: the length of described mechanism rack groove (8.3) is more than or equal to driving lever+follower lever-mechanism rack pin-and-hole a(8.1)+mechanism rack pin-and-hole b (8.2)-sheave radius.
4. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, is characterized in that: be arranged in the bearing pin a(5 in frame (8)), bearing pin b(6) in alignment with the center line of mechanism rack groove (8.3); This device has bidirectional-movement characteristic simultaneously.
5. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, is characterized in that: throw-out lever (4) can for free movable part or with driving lever (2) by bearing pin a(5) centered by circle.
6. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, is characterized in that: described driving mechanism can drive for manual or motor.
7. a kind of single groove Geneva mechanism for teaching demonstration according to claim 1, is characterized in that: described mechanism rack groove can be skewed slot, and now mechanism only has unidirectional movement characteristic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410019122.5A CN103742616B (en) | 2014-01-15 | 2014-01-15 | A kind of single groove Geneva mechanism for teaching demonstration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410019122.5A CN103742616B (en) | 2014-01-15 | 2014-01-15 | A kind of single groove Geneva mechanism for teaching demonstration |
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| CN103742616A true CN103742616A (en) | 2014-04-23 |
| CN103742616B CN103742616B (en) | 2016-05-18 |
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| CN201410019122.5A Expired - Fee Related CN103742616B (en) | 2014-01-15 | 2014-01-15 | A kind of single groove Geneva mechanism for teaching demonstration |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217640A (en) * | 2014-09-04 | 2014-12-17 | 浙江大学 | Electronic Geneva wheel type experiment table for teaching |
| CN106763606A (en) * | 2016-12-06 | 2017-05-31 | 昆明理工大学 | It is a kind of with multiple it is dynamic stop than outside geneva mechanism and its application method |
| CN107514875A (en) * | 2017-07-20 | 2017-12-26 | 江苏中聚检测服务有限公司 | A kind of drying effect good electric heating forced air drying equipment and its control system |
| CN107931704A (en) * | 2017-11-16 | 2018-04-20 | 宁波市鄞州堃信工业产品设计有限公司 | A kind of transmission mechanism of pipe cutter |
| CN109826920A (en) * | 2019-02-27 | 2019-05-31 | 长沙理工大学 | A kind of design method for the Geneva mechanism that uniformly distributed slot is not sold uniformly |
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| JPS5334058A (en) * | 1976-09-10 | 1978-03-30 | Fujitsu Ltd | Intermittent motion mechanism |
| US5080636A (en) * | 1991-01-22 | 1992-01-14 | Theodore Weber | Intermittent motion drive assembly |
| CN200996454Y (en) * | 2007-01-13 | 2007-12-26 | 王仲珏 | Differential gear reducer in grinding ball continuous-casting production line |
| CN201973224U (en) * | 2011-02-25 | 2011-09-14 | 上海中科深江电动车辆有限公司 | Gear-shifting execution mechanism for electrically-controlled mechanical type two-gear automatic transmission of electric automobile |
| CN102853049A (en) * | 2012-08-21 | 2013-01-02 | 赵轩 | Two-way intermittent geneva mechanism |
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2014
- 2014-01-15 CN CN201410019122.5A patent/CN103742616B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5334058A (en) * | 1976-09-10 | 1978-03-30 | Fujitsu Ltd | Intermittent motion mechanism |
| US5080636A (en) * | 1991-01-22 | 1992-01-14 | Theodore Weber | Intermittent motion drive assembly |
| CN200996454Y (en) * | 2007-01-13 | 2007-12-26 | 王仲珏 | Differential gear reducer in grinding ball continuous-casting production line |
| CN201973224U (en) * | 2011-02-25 | 2011-09-14 | 上海中科深江电动车辆有限公司 | Gear-shifting execution mechanism for electrically-controlled mechanical type two-gear automatic transmission of electric automobile |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217640A (en) * | 2014-09-04 | 2014-12-17 | 浙江大学 | Electronic Geneva wheel type experiment table for teaching |
| CN104217640B (en) * | 2014-09-04 | 2016-08-17 | 浙江大学 | A kind of teaching electronic sheave laboratory table |
| CN106763606A (en) * | 2016-12-06 | 2017-05-31 | 昆明理工大学 | It is a kind of with multiple it is dynamic stop than outside geneva mechanism and its application method |
| CN106763606B (en) * | 2016-12-06 | 2023-09-26 | 昆明理工大学 | Outer sheave mechanism with multiple stop-and-go ratios and use method thereof |
| CN107514875A (en) * | 2017-07-20 | 2017-12-26 | 江苏中聚检测服务有限公司 | A kind of drying effect good electric heating forced air drying equipment and its control system |
| CN107931704A (en) * | 2017-11-16 | 2018-04-20 | 宁波市鄞州堃信工业产品设计有限公司 | A kind of transmission mechanism of pipe cutter |
| CN109826920A (en) * | 2019-02-27 | 2019-05-31 | 长沙理工大学 | A kind of design method for the Geneva mechanism that uniformly distributed slot is not sold uniformly |
| CN109826920B (en) * | 2019-02-27 | 2021-06-25 | 长沙理工大学 | Design method of sheave mechanism with uniformly distributed grooves and non-uniformly distributed pins |
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| CN103742616B (en) | 2016-05-18 |
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Granted publication date: 20160518 Termination date: 20200115 |