CN103824503A - Experimental device and method for mechanisms - Google Patents
Experimental device and method for mechanisms Download PDFInfo
- Publication number
- CN103824503A CN103824503A CN201410085232.1A CN201410085232A CN103824503A CN 103824503 A CN103824503 A CN 103824503A CN 201410085232 A CN201410085232 A CN 201410085232A CN 103824503 A CN103824503 A CN 103824503A
- Authority
- CN
- China
- Prior art keywords
- driven shaft
- traffic cycle
- fixed
- crank
- cam
- 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.)
- Granted
Links
Images
Landscapes
- Transmission Devices (AREA)
Abstract
The invention provides an experimental device and method for mechanisms. The device is matched with a corresponding locking device by utilizing one-way drive characteristics of flywheels, and clockwise and anticlockwise rotation of different parts on the same shaft is realized; different parts, such as a center wheel, a planet carrier and a cam, are replaced and mounted on a large turntable, so that three experimental devices can be formed. According to the experimental method, the large turntable serves as a reference system, a relative movement state and a relative still state of components are formed by configuring different parts such as the center wheel, the planet carrier and the cam, rotating the components in the reference system and reversely rotating the reference system, and three reversal-process experiments such as epicyclic gear train transmission ratio reversal-process calculation, cam outline reversal-process design and connecting rod mechanism tempering reversal-process can be realized. The experimental device for realizing the reversal process is invented at first in the mechanism theory, and drawing and abstract analysis can be intuitively realized through the experimental device and method.
Description
Technical field
The present invention relates to a kind of experimental provision and experimental technique of Machine Design, relate to more specifically a kind of experimental provision and experimental technique of theory of mechanisms, can realize epicyclic gearing than experimental provision and the experimental technique of " reversal process " calculating, cam profile " reversal process " design and linkage assembly tempering " reversal process " design 3 kinds " reversal processes ".
Background technology
In a kind of " theory of mechanisms ", for realizing device and the experimental technique of " reversal process " experiment, belong to teaching experimental equipment and experimental technique.In institution of higher education's " theory of mechanisms " (mechanical principle, Fundamentals of Machine Design etc.) course, relate to " reversal process " in have that epicyclic gearing calculates than " reversal process ", the content such as cam profile " reversal process " design and linkage assembly tempering " reversal process " design, " reversal process " is to adopt relative motion principle, be reference system when getting different objects in mechanism, the relative motion relation between member remains unchanged.In existing teaching, all explain by drawing and abstract analysis, lack experimental provision intuitively.Therefore be necessary to design one and can realize epicyclic gearing than experimental provision and the experimental technique of " reversal process " calculating, cam profile " reversal process " design and linkage assembly tempering " reversal process " design 3 kinds " reversal processes ".
Summary of the invention
The object of the invention is to propose a kind of experimental provision and experimental technique of theory of mechanisms, can realize epicyclic gearing than experimental provision and the experimental technique of " reversal process " calculating, cam profile " reversal process " design and linkage assembly tempering " reversal process " design 3 kinds " reversal processes ".
Adopt for achieving the above object following technical scheme:
An experimental provision for theory of mechanisms, comprises station rack, foot pad, bearing, main drive shaft, crank, crossbeam, traffic cycle drive sprocket, driven shaft drive sprocket, driven shaft, driven shaft fixed bar, driven shaft fixed pin, traffic cycle, axle head screw, index dial, axle journal, flat key, traffic cycle driving chain, driven shaft driving chain, traffic cycle fixed pin, forward transmission flywheel, reversion transmission flywheel, is characterized in that:
Station rack, foot pad, crossbeam three are connected to form a door-shaped frame structure, and main drive shaft and driven shaft are arranged on top, framework both sides by bearing,
Forward transmission flywheel is installed on main drive shaft, and forward transmission flywheel adopts bicycle freewheel, and its inside is an overrunning clutch being made up of handle ratchet wheel mechanism,
Reversion transmission flywheel is also installed on main drive shaft, and reversion transmission flywheel is identical with forward transmission flywheel structure, but is oppositely arranged on main drive shaft,
Main drive shaft rear end fixed installation crank,
Main drive shaft front end is provided with center pit, for traffic cycle fixed pin is inserted wherein, wherein can fix traffic cycle when traffic cycle fixed pin inserts, and prevents that traffic cycle from rotating,
On driven shaft, be installed with driven shaft drive sprocket,
Traffic cycle drive sprocket and traffic cycle are fixed together, and overall empty set is on driven shaft, and traffic cycle is marked with scale, for reflecting the rotational angle of traffic cycle,
Driven shaft rear end is installed with driven shaft fixed bar, and there is perforate driven shaft fixed bar end, correspondingly with driven shaft fixed bar position of opening on crossbeam goes out also to have perforate, driven shaft fixed pin inserts corresponding aperture on crossbeam through the perforate of driven shaft fixed bar, for fixing driven shaft, prevent that driven shaft from rotating
In the anterior keyway of driven shaft, lay flat key, driven shaft front end has screwed hole of centre, is threaded connection index dial is fixed on driven shaft with axle head screw, and index dial is used for reflecting the rotational angle of driven shaft,
Reversion transmission flywheel is connected with driven shaft drive sprocket by driven shaft driving chain, when crank clockwise rotates main drive shaft, drives 8 driven shaft drive sprockets and driven shaft to clockwise rotate by driven shaft driving chain;
Forward transmission flywheel is connected with traffic cycle drive sprocket by traffic cycle driving chain, when crank rotates counterclockwise main drive shaft, drives traffic cycle drive sprocket and traffic cycle to rotate counterclockwise by traffic cycle driving chain,
Axle journal is for installing not with the part of driven shaft rotation, and as centre wheel, flat key is for connect the part that rotates together with driven shaft, as planet carrier, cam etc.
It is configuration like this than the experimental provision of " reversal process " calculating that the present invention realizes epicyclic gearing:
On traffic cycle, with annular wheel gib screw, annular wheel is fixed thereon, on driven shaft, be fixed with planet carrier by flat key, on the axle of planet carrier, planet wheel is installed, planet carrier turns clockwise with driven shaft, the axle journal position of driven shaft is set with centre wheel, and centre wheel rotation direction and velocity of rotation are not subject to the impact of driven shaft.
The experimental provision that the present invention realizes cam profile " reversal process " design is configuration like this:
On traffic cycle, with guide rail gib screw, driven member guide rail is fixed thereon, cam follower is through driven member guide rail, cam follower end is installed roller, be used for reducing friction, on roller center hole, there is a pencil fixed muffle, pencil can be inserted in sleeve, for drawing cam profile, on driven shaft, be fixed with cam by flat key, cam turns clockwise with driven shaft.
The experimental provision that the present invention realizes linkage assembly tempering " reversal process " design is configuration like this:
On traffic cycle, be fixed with four-bar mechanism frame with frame gib screw through guide groove, another section of empty set of four-bar mechanism frame is at the axle journal position at driven shaft, four-bar mechanism frame couples together by hinge and rocking bar, rocking bar couples together by hinge and connecting rod, connecting rod couples together by hinge and crank, crank is connected on driven shaft by flat key
Another kind of configuration is:
On driven shaft by the flat key crank that is connected, crank couples together by hinge and connecting rod, connecting rod couples together by hinge and rocking bar, rocking bar couples together by hinge and four-bar mechanism frame, on the guide groove of connecting rod and rocking bar, be fixed with configuration tempering connecting link with configuration tempering attachment screw, make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant.
A kind of experimental technique of theory of mechanisms:
The present invention realizes epicyclic gearing:
1. with annular wheel gib screw, annular wheel is fixed thereon on traffic cycle, on driven shaft, be fixed with planet carrier by flat key, on the axle of planet carrier, planet wheel is installed, planet carrier turns clockwise with driven shaft, the axle journal position of driven shaft is set with centre wheel, and centre wheel rotation direction and velocity of rotation are not subject to the impact of driven shaft.
2. insert in the center pit of main drive shaft with traffic cycle fixed pin, traffic cycle is fixed;
3. extract driven shaft fixed pin from crossbeam,
4. clockwise rotate crank one week, the computing formula according to epicyclic gearing ratio:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, N
1centered by wheel speed, N
hfor planet carrier rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, in the time that planet carrier clockwise rotates 1 week, centre wheel will clockwise rotate 4 weeks, can find out by 14 index dials direction and all numbers that centre wheel rotates; Record driven shaft rotational angle
5. traffic cycle fixed pin is extracted in the center pit of main drive shaft, driven shaft fixed pin is come in and gone out in crossbeam,
6. rotate counterclockwise crank one week, the computing formula according to fixed shaft gear train ratio of gear:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, Z
2for the planet wheel number of teeth, N
1centered by wheel speed, N
hfor planet carrier rotating speed, N
3for annular wheel rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, star gear tooth number Z
2=20, in the time that annular wheel rotates counterclockwise 1 week with rotating disk, centre wheel will clockwise rotate 3 weeks, can find out by 14 index dials direction and all numbers that centre wheel rotates; Record driven shaft rotational angle, can find out, the relative velocity of annular wheel and centre wheel is all 4 weeks.
The experimental technique that the present invention realizes cam profile " reversal process " design is:
1. on traffic cycle, with guide rail gib screw, driven member guide rail is fixed thereon, cam follower is through driven member guide rail, cam follower end is installed roller, be used for reducing friction, on roller center hole, there is a pencil fixed muffle, pencil can be inserted in sleeve, for drawing cam profile, on driven shaft, be fixed with cam by flat key, cam turns clockwise with driven shaft.
2. insert in the center pit of main drive shaft with traffic cycle fixed pin, traffic cycle is fixed;
3. extract driven shaft fixed pin from crossbeam,
4. clockwise rotate crank one week, can observe cam dextrorotation circles, driven member moves up and down once, and at the actuating travel section of cam, driven member moves upward, in the far section of stopping of cam, driven member is slack at peak, and at the reverse-running section of cam, driven member moves downward, in the closely section of stopping of cam, driven member is slack in minimum point;
5. traffic cycle fixed pin is extracted in the center pit of main drive shaft,
6. driven shaft fixed pin is come in and gone out in crossbeam,
7. on cam, cover a cardboard,
8. rotate counterclockwise crank one week, cam follower, driven member guide rail, pencil fixed muffle all will rotate counterclockwise with traffic cycle, cam follower simultaneously, and pencil fixed muffle also moves along driven member guide rail, pencil will be drawn next closed curve on cardboard, it is shaped as the equal space line of cam profile, and distance is the radius of roller, and this curve is the pitch curve of cam.
The experimental technique that the present invention realizes linkage assembly tempering " reversal process " design is such:
1. on traffic cycle, be fixed with four-bar mechanism frame with frame gib screw through guide groove, another section of empty set of four-bar mechanism frame is at the axle journal position at driven shaft, four-bar mechanism frame couples together by hinge and rocking bar, rocking bar couples together by hinge and connecting rod, connecting rod couples together by hinge and crank, and crank is connected on driven shaft by flat key;
2. insert in the center pit of main drive shaft with traffic cycle fixed pin, traffic cycle is fixed, extract driven shaft fixed pin from crossbeam;
3. on traffic cycle, cover a cardboard, on cardboard, draw the initial orientation angle of lower crank and rocking bar;
4. clockwise rotate angle of crank, then the position angle of drawing lower crank and rocking bar on cardboard;
5. on driven shaft by the flat key crank that is connected, crank couples together by hinge and connecting rod, connecting rod couples together by hinge and rocking bar, rocking bar couples together by hinge and four-bar mechanism frame, on the guide groove of connecting rod and rocking bar, be fixed with configuration tempering connecting link with configuration tempering attachment screw, make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant.
5. take off frame gib screw from traffic cycle,
6. stir counterclockwise by the four-bar mechanism of " tempering ", make crank get back to initial position, the position of rocking bar under drawing on cardboard;
7. pull down configuration tempering attachment screw, four-bar mechanism frame is pulled back to initial position, four-bar mechanism frame is fixed on traffic cycle with frame gib screw;
8. again clockwise rotate new angle of crank, repeat 4. to step 7., until draw the position of 3 rocking bars; Take off cardboard, cross the individual location point at the hinge center, two ends of rocking bar and draw respectively two circles, the center of circle of these two circles is respectively the center of revolute pair between crank center of rotation and crank and connecting rod, the distance of center circle of two circles is crank length, the center of circle of two circles is respectively four-bar mechanism frame length and length of connecting rod with the distance at hinge center, rocking bar two ends respectively, like this, realize known two side link corresponding angles, asked the problem of length of connecting rod and a side link length.
Tool of the present invention has the following advantages and beneficial effect:
Device of the present invention utilizes the unidirectional drive characteristic of flywheel, coordinates corresponding locking device, realized different parts on same axle clockwise and rotate counterclockwise; By changing different parts are installed, can form three kinds of experimental provisions on traffic cycle; Method of the present invention, using traffic cycle as reference system, by member and reverse rotation reference system in rotation reference system, makes member form relative motion with relative static, can realize three kinds of " reversion is sent out " experiments.The apparatus structure of invention is ingenious, the careful uniqueness of method of invention.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is teaching aid transmission principle figure of the present invention.
Fig. 2 is teaching aid main structure chart of the present invention.
Fig. 3 is the fundamental diagram of the present invention while calculating than " reversal process " for testing epicyclic gearing.
The principle of work sketch that Fig. 4 is the present invention when testing cam profile " reversal process " design.
Principle of work sketch before the tempering that Fig. 5 a is the present invention when testing linkage assembly tempering " reversal process " design.
Principle of work sketch after the tempering that Fig. 5 b is the present invention when testing linkage assembly tempering " reversal process " design
In figure: 1-station rack, 2-foot pad, 3-bearing, 4-main drive shaft, 5-crank, 6-crossbeam, 7-traffic cycle drive sprocket, 8-driven shaft drive sprocket, 9-driven shaft, 10-driven shaft fixed bar, 11-driven shaft fixed pin, 12-traffic cycle, 13-axle head screw, 14-index dial, 15-axle journal, 16-flat key, 17a-traffic cycle driving chain, 17b-driven shaft driving chain, 18-traffic cycle fixed pin, 19-forward transmission flywheel, 20-reversion transmission flywheel, 21-annular wheel gib screw, 22-annular wheel, 23-planet wheel, 24-planet carrier, 25-centre wheel, 26-cam follower, 27-driven member guide rail, 28-guide rail gib screw, 29-roller, 30-pencil fixed muffle, 31-cam, 32-crank, 33-connecting rod, 34-hinge, 35-rocking bar, 36-guide groove, 37-four-bar mechanism frame, 38-frame gib screw, 39-configuration tempering connecting link, 40-configuration tempering attachment screw.
Embodiment
An experimental provision for theory of mechanisms, comprises station rack 1, foot pad 2, bearing 3, main drive shaft 4, crank 5, crossbeam 6, traffic cycle drive sprocket 7, driven shaft drive sprocket 8, driven shaft 9, driven shaft fixed bar 10, driven shaft fixed pin 11, traffic cycle 12, axle head screw 13, index dial 14, axle journal 15, flat key 16, traffic cycle driving chain 17a, driven shaft driving chain 17b, traffic cycle fixed pin 18, forward transmission flywheel 19, reversion transmission flywheel 20, is characterized in that:
On driven shaft 9, be installed with driven shaft drive sprocket 8,
Traffic cycle drive sprocket 7 is fixed together with traffic cycle 12, and overall empty set is on driven shaft 9, and traffic cycle 12 is marked with scale, for reflecting the rotational angle of traffic cycle 7,
Driven shaft 9 rear ends are installed with driven shaft fixed bar 10, there is perforate driven shaft fixed bar 10 ends, correspondingly with driven shaft fixed bar 10 position of opening on crossbeam 6 go out also to have perforate, driven shaft fixed pin 11 inserts corresponding aperture on crossbeam 6 through 10 perforates of driven shaft fixed bar, for fixing driven shaft 9, prevent that driven shaft 9 from rotating
In the anterior keyway of driven shaft 9, lay flat key 16, driven shaft 9 front ends have screwed hole of centre, be threaded connection index dial 14 is fixed on driven shaft 9 with axle head screw 13, and index dial 14 is for reflecting the rotational angle of driven shaft 9,
It is configuration like this than the experimental provision of " reversal process " calculating that the present invention realizes epicyclic gearing:
On traffic cycle 12, with annular wheel gib screw 21, annular wheel 22 is fixed thereon, on driven shaft 9, be fixed with planet carrier 24 by flat key 16, planet wheel 23 is installed on the axle of planet carrier 24, planet carrier 24 turns clockwise with driven shaft 9, axle journal 15 positions of driven shaft 9 are set with centre wheel 25, and centre wheel 25 rotation directions and velocity of rotation are not subject to the impact of driven shaft.
The experimental provision that the present invention realizes cam profile " reversal process " design is configuration like this:
On traffic cycle 12, with guide rail gib screw 28, driven member guide rail 27 is fixed thereon, cam 26 driven members are through driven member guide rail 27, cam follower 26 ends are installed roller 29, be used for reducing friction, on roller 29 center pits, there is a pencil fixed muffle 30, pencil can be inserted in sleeve, for drawing cam profile, on driven shaft 9, be fixed with cam 31 by flat key 16, cam 31 turns clockwise with driven shaft 9.
The experimental provision that the present invention realizes linkage assembly tempering " reversal process " design is configuration like this:
On traffic cycle 12, be fixed with four-bar mechanism frame 37 with frame gib screw 38 through guide groove 36, another section of empty set of four-bar mechanism frame 37 is at axle journal 15 positions at driven shaft 9, four-bar mechanism frame 37 couples together by hinge 34 and rocking bar 35, rocking bar 35 couples together by hinge 34 and connecting rod 33, connecting rod 33 couples together by hinge 34 and crank 32, crank 32 is connected on driven shaft 9 by flat key 16
Another kind of configuration is:
On driven shaft 9 by flat key 16 crank 32 that is connected, crank 32 couples together by hinge 34 and connecting rod 33, connecting rod 33 couples together by hinge 34 and rocking bar 35, rocking bar 35 couples together by hinge 34 and four-bar mechanism frame 37, on the guide groove 36 of connecting rod 33 and rocking bar 35, be fixed with configuration tempering connecting link 39 with 40 configuration tempering attachment screws, make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant.
A kind of experimental technique of theory of mechanisms:
The present invention realizes epicyclic gearing:
1. with annular wheel gib screw 21, annular wheel 22 is fixed thereon on traffic cycle 12, on driven shaft 9, be fixed with planet carrier 24 by flat key 16, planet wheel 23 is installed on the axle of planet carrier 24, planet carrier 24 turns clockwise with driven shaft 9, axle journal 15 positions of driven shaft 9 are set with centre wheel 25, and centre wheel 25 rotation directions and velocity of rotation are not subject to the impact of driven shaft.
2. insert in the center pit of main drive shaft 4 with traffic cycle fixed pin 18, traffic cycle 12 is fixed;
3. extract driven shaft fixed pin 11 from crossbeam 6,
4. clockwise rotate crank 5 one weeks, the computing formula according to epicyclic gearing ratio:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, N
1centered by wheel speed, N
hfor planet carrier rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, in the time that planet carrier clockwise rotates 1 week, centre wheel will clockwise rotate 4 weeks, can find out by index dial 14 direction and all numbers that centre wheel rotates; Record driven shaft rotational angle
5. traffic cycle 18 fixed pins are extracted in the center pit of main drive shaft 4, driven shaft fixed pin 11 are come in and gone out in crossbeam 6,
6. rotate counterclockwise crank 5 one weeks, the computing formula according to fixed shaft gear train ratio of gear:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, Z
2for the planet wheel number of teeth, N
1centered by wheel speed, N
hfor planet carrier rotating speed, N
3for annular wheel rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, star gear tooth number Z
2=20, in the time that annular wheel rotates counterclockwise 1 week with rotating disk, centre wheel will clockwise rotate 3 weeks, can find out by 14 index dials direction and all numbers that centre wheel rotates; Record driven shaft rotational angle, can find out, the relative velocity of annular wheel and centre wheel is all 4 weeks.
The experimental technique that the present invention realizes cam profile " reversal process " design is:
1. on traffic cycle 12, with guide rail gib screw 28, driven member guide rail 27 is fixed thereon, cam follower 26 is through driven member guide rail 27, cam follower 26 ends are installed roller 29, be used for reducing friction, on roller 29 center pits, there is a pencil fixed muffle 30, pencil can be inserted in sleeve, for drawing cam profile, on driven shaft 9, be fixed with cam 31 by flat key 16, cam 31 turns clockwise with driven shaft 9.
2. with inserting with traffic cycle fixed pin 18 in the center pit of main drive shaft 4, traffic cycle 12 is fixed;
3. extract driven shaft fixed pin 11 from crossbeam 6,
4. clockwise rotate crank 5 one weeks, can observe cam dextrorotation circles, driven member moves up and down once, and at the actuating travel section of cam, driven member moves upward, in the far section of stopping of cam, driven member is slack at peak, and at the reverse-running section of cam, driven member moves downward, in the closely section of stopping of cam, driven member is slack in minimum point;
5. traffic cycle fixed pin 18 is extracted in the center pit of main drive shaft 4,
6. driven shaft fixed pin 11 is come in and gone out in crossbeam 6,
7. on cam, cover a cardboard,
8. rotate counterclockwise crank 5 one weeks, cam follower 26, driven member guide rail 27, pencil fixed muffle 30 all will rotate counterclockwise with traffic cycle 12, cam follower 26 simultaneously, and pencil fixed muffle 30 also moves along driven member guide rail 27, pencil will be drawn next closed curve on cardboard, it is shaped as the equal space line of cam profile, and distance is the radius of roller, and this curve is the pitch curve of cam.
The experimental technique that the present invention realizes linkage assembly tempering " reversal process " design is such:
1. on traffic cycle 12, be fixed with four-bar mechanism frame 37 with frame gib screw 38 through guide groove 36, another section of empty set of four-bar mechanism frame 37 is at axle journal 15 positions at driven shaft 9, four-bar mechanism frame 37 couples together by hinge 34 and rocking bar 35, rocking bar 35 couples together by hinge 34 and connecting rod 33, connecting rod 33 couples together by hinge 34 and crank 32, and crank 32 is connected on driven shaft 9 by flat key 16;
2. insert in the center pit of main drive shaft 4 with traffic cycle fixed pin 18, traffic cycle 12 is fixed, extract driven shaft fixed pin 11 from crossbeam 6;
3. on traffic cycle 12, cover a cardboard, the initial orientation angle of drawing lower crank and rocking bar on cardboard;
4. clockwise rotate 5 one angles of crank, then the position angle of drawing lower crank and rocking bar on cardboard;
5. on driven shaft 9 by flat key 16 crank 32 that is connected, crank 32 couples together by hinge 34 and connecting rod 33, connecting rod 33 couples together by hinge 34 and rocking bar 35, rocking bar 35 couples together by hinge 34 and four-bar mechanism frame 37, on the guide groove 36 of connecting rod 33 and rocking bar 35, be fixed with configuration tempering connecting link 39 with configuration tempering attachment screw 40, make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant.
5. take off frame gib screw 38 from traffic cycle 12,
6. stir counterclockwise by the four-bar mechanism of " tempering ", make crank 32 get back to initial position, the position of rocking bar 35 under drawing on cardboard;
7. pull down configuration tempering attachment screw 40, four-bar mechanism frame 37 is pulled back to initial position, four-bar mechanism frame 37 is fixed on traffic cycle 12 with frame gib screw 38;
8. again clockwise rotate 5 one new angles of crank, repeat 4. to step 7., until draw the position of 3 rocking bars 35; Take off cardboard, cross 3 location points at two ends hinge 34 centers of rocking bar 35 and draw respectively two circles, the center of circle of these two circles is respectively the center of revolute pair between crank center of rotation and crank and connecting rod, the distance of center circle of two circles is crank 32 length, the center of circle of two circles is respectively four-bar mechanism frame 37 length and connecting rod 33 length with the distance at rocking bar 35 hinge centers, two ends respectively, like this, realize known two side link corresponding angles, asked the problem of length of connecting rod and a side link length.
Claims (8)
1. the experimental provision of a theory of mechanisms, comprise station rack (1), foot pad (2), bearing (3), main drive shaft (4), crank (5), crossbeam (6), traffic cycle drive sprocket (7), driven shaft drive sprocket (8), driven shaft (9), driven shaft fixed bar (10), driven shaft fixed pin (11), traffic cycle (12), axle head screw (13), index dial (14), axle journal (15), flat key (16), traffic cycle driving chain (17a), driven shaft driving chain (17b), traffic cycle fixed pin (18), forward transmission flywheel (19), reversion transmission flywheel (20), it is characterized in that:
Station rack (1), foot pad (2), crossbeam (6) three are connected to form a door-shaped frame structure, and main drive shaft (4) and driven shaft (9) are arranged on top, framework both sides by bearing (3),
Forward transmission flywheel (19) is installed on main drive shaft (4), and forward transmission flywheel (19) adopts bicycle freewheel, and its inside is an overrunning clutch being made up of handle ratchet wheel mechanism,
Reversion transmission flywheel (20) is also installed on main drive shaft (4), and reversion transmission flywheel (20) is identical with forward transmission flywheel (19) structure, but it is upper to be oppositely arranged on main drive shaft (4),
Main drive shaft (4) rear end fixed installation crank (5),
Main drive shaft (4) front end is provided with center pit, for traffic cycle fixed pin (18) is inserted wherein, wherein can fix traffic cycle (12) when traffic cycle fixed pin (18) inserts, and prevents that traffic cycle (12) from rotating,
On driven shaft (9), be installed with driven shaft drive sprocket (8),
Traffic cycle drive sprocket (7) is fixed together with traffic cycle (12), and overall empty set is upper at driven shaft (9), and traffic cycle (12) is marked with scale, for reflecting the rotational angle of traffic cycle (7),
Driven shaft (9) rear end is installed with driven shaft fixed bar (10), there is perforate driven shaft fixed bar (10) end, upper go out also the have perforate corresponding to driven shaft fixed bar (10) position of opening of crossbeam (6), driven shaft fixed pin (11) inserts the upper corresponding aperture of crossbeam (6) through driven shaft fixed bar (10) perforate, for fixing driven shaft (9), prevent that driven shaft (9) from rotating
In the anterior keyway of driven shaft (9), lay flat key (16), driven shaft (9) front end has screwed hole of centre, be threaded connection index dial (14) is fixed on to driven shaft (9) above with axle head screw (13), index dial (14) is for reflecting the rotational angle of driven shaft (9)
Reversion transmission flywheel (20) is connected with driven shaft drive sprocket (8) by driven shaft driving chain (17b), when crank (5) clockwise rotates main drive shaft (4), drive driven shaft drive sprocket (8) and driven shaft (9) to clockwise rotate by driven shaft driving chain (17b);
Forward transmission flywheel (19) is connected with traffic cycle drive sprocket (7) by traffic cycle driving chain (17a), when crank (5) rotates counterclockwise main drive shaft (4), drive traffic cycle drive sprocket (7) and traffic cycle (12) to rotate counterclockwise by traffic cycle driving chain (17a)
Axle journal (15) is for installing not with the part of driven shaft (9) rotation, and as centre wheel (25), flat key (16) is for connect the part that rotates with driven shaft (9) together with, as planet carrier (24), cam (31).
2. the experimental provision of a kind of theory of mechanisms as claimed in claim 1, is characterized in that:
Described traffic cycle (12) is above fixed thereon annular wheel (22) with annular wheel gib screw (21), driven shaft (9) is upper is fixed with planet carrier (24) by flat key (16), planet wheel (23) is installed on the axle of planet carrier (24), planet carrier (24) turns clockwise with driven shaft (9), axle journal (15) position of driven shaft (9) is set with centre wheel (25), and centre wheel (25) rotation direction and velocity of rotation are not subject to the impact of driven shaft.
3. the experimental provision of a kind of theory of mechanisms as claimed in claim 1, is characterized in that:
Described traffic cycle (12) is above fixed thereon driven member guide rail (27) with guide rail gib screw (28), cam (26) driven member is through driven member guide rail (27), cam follower (26) end is installed roller (29), be used for reducing friction, on roller (29) center pit, there is a pencil fixed muffle (30), pencil can be inserted in sleeve, be used for drawing cam profile, driven shaft (9) is upper is fixed with cam (31) by flat key (16), and cam (31) turns clockwise with driven shaft (9).
4. the experimental provision of a kind of theory of mechanisms as claimed in claim 1, is characterized in that:
Described traffic cycle (12) is above fixed with four-bar mechanism frame (37) with frame gib screw (38) through guide groove (36), another section of empty set of four-bar mechanism frame (37) is at the axle journal in driven shaft (9) (15) position, four-bar mechanism frame (37) couples together by hinge (34) and rocking bar (35), rocking bar (35) couples together by hinge (34) and connecting rod (33), connecting rod (33) couples together by hinge (34) and crank (32), and crank (32) is connected on driven shaft (9) by flat key (16).
5. the experimental provision of a kind of theory of mechanisms as claimed in claim 1, is characterized in that:
Driven shaft (9) is upper by flat key (16) crank (32) that is connected, crank (32) couples together by hinge (34) and connecting rod (33), connecting rod (33) couples together by hinge (34) and rocking bar (35), rocking bar (35) couples together by hinge (34) and four-bar mechanism frame (37), guide groove (36) at connecting rod (33) and rocking bar (35) is above fixed with configuration tempering connecting link (39) with configuration tempering attachment screw (40), make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant.
6. an experimental technique for theory of mechanisms, realizes epicyclic gearing and calculates than " reversal process ", the steps include:
A, annular wheel (22) is fixed thereon on traffic cycle (12) with annular wheel gib screw (21), driven shaft (9) is upper is fixed with planet carrier (24) by flat key (16), planet wheel (23) is installed on the axle of planet carrier (24), planet carrier (24) turns clockwise with driven shaft (9), axle journal (15) position of driven shaft (9) is set with centre wheel (25), centre wheel (25) rotation direction and velocity of rotation are not subject to the impact of driven shaft
B, use traffic cycle fixed pin (18) insert in the center pit of main drive shaft (4), and traffic cycle (12) is fixed;
C, extract driven shaft fixed pin (11) from crossbeam (6),
D, clockwise rotate crank (5) one weeks, the computing formula according to epicyclic gearing ratio:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, N
1centered by wheel speed, N
hfor planet carrier rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, in the time that planet carrier clockwise rotates 1 week, centre wheel will clockwise rotate 4 weeks, can find out by index dial 14 direction and all numbers that centre wheel rotates; Record driven shaft rotational angle,
E, traffic cycle fixed pin (18) is extracted in the center pit of main drive shaft 4, driven shaft fixed pin (11) is come in and gone out in crossbeam (6),
F, rotate counterclockwise crank (5) one weeks, the computing formula according to fixed shaft gear train ratio of gear:
so
z
3for the annular wheel number of teeth, Z
1centered by tooth number, Z
2for the planet wheel number of teeth, N
1centered by wheel speed, N
hfor planet carrier rotating speed, N
3for annular wheel rotating speed, as annular wheel number of teeth Z
3=60, centre wheel tooth number Z
1=20, star gear tooth number Z
2=20, in the time that annular wheel rotates counterclockwise 1 week with rotating disk, centre wheel will clockwise rotate 3 weeks, can find out by index dial (14) direction and all numbers that centre wheel rotates; Record driven shaft rotational angle, can find out, the relative velocity of annular wheel and centre wheel is all 4 weeks.
7. an experimental technique for theory of mechanisms, realizes cam profile " reversal process " design, the steps include:
A, traffic cycle (12) are above fixed thereon driven member guide rail (27) with guide rail gib screw (28), cam follower (26) is through driven member guide rail (27), cam follower (26) end is installed roller (29), be used for reducing friction, on roller (29) center pit, there is a pencil fixed muffle (30), pencil can be inserted in sleeve, be used for drawing cam profile, driven shaft (9) is upper is fixed with cam (31) by flat key (16), cam (31) turns clockwise with driven shaft (9)
B, use traffic cycle fixed pin (18) insert in the center pit of main drive shaft (4), and traffic cycle (12) is fixed;
C, extract driven shaft fixed pin (11) from crossbeam (6),
D, clockwise rotate crank (5) one weeks, can observe cam dextrorotation circles, driven member moves up and down once, and at the actuating travel section of cam, driven member moves upward, in the far section of stopping of cam, driven member is slack at peak, and at the reverse-running section of cam, driven member moves downward, in the closely section of stopping of cam, driven member is slack in minimum point;
E, traffic cycle fixed pin (18) is extracted in the center pit of main drive shaft 4,
F, driven shaft fixed pin (11) is come in and gone out in crossbeam (6),
G, on cam, cover a cardboard,
H, rotate counterclockwise crank (5) one weeks, cam follower (26), driven member guide rail (27), pencil fixed muffle (30) all will rotate counterclockwise with traffic cycle (12), cam follower (26) simultaneously, and pencil fixed muffle (30) is also mobile along driven member guide rail (27), pencil will be drawn next closed curve on cardboard, it is shaped as the equal space line of cam profile, and distance is the radius of roller, and this curve is the pitch curve of cam.
8. an experimental technique for theory of mechanisms, realizes linkage assembly tempering " reversal process " design, the steps include:
A, traffic cycle (12) are above fixed with four-bar mechanism frame (37) with frame gib screw (38) through guide groove (36), another section of empty set of four-bar mechanism frame (37) is at the axle journal in driven shaft (9) (15) position, four-bar mechanism frame (37) couples together by hinge (34) and rocking bar (35), rocking bar (35) couples together by hinge (34) and connecting rod (33), connecting rod (33) couples together by hinge (34) and crank (32), and crank (32) is connected on driven shaft (9) by flat key (16);
B, use traffic cycle fixed pin (18) insert in the center pit of main drive shaft (4), and traffic cycle (12) is fixed, and extract driven shaft fixed pin (11) from crossbeam (6);
C, at a upper cardboard, the initial orientation angle of drawing lower crank and rocking bar on cardboard of covering of traffic cycle (12);
D, clockwise rotate (5) angles of crank, then the position angle of drawing lower crank and rocking bar on cardboard;
E, driven shaft (9) are upper by flat key (16) crank (32) that is connected, crank (32) couples together by hinge (34) and connecting rod (33), connecting rod (33) couples together by hinge (34) and rocking bar (35), rocking bar (35) couples together by hinge (34) and four-bar mechanism frame (37), guide groove (36) at connecting rod (33) and rocking bar (35) is above fixed with configuration tempering connecting link (39) with configuration tempering attachment screw (40), make four-bar mechanism tempering, keep the configuration of whole four connecting rods constant;
F, take off frame gib screw (38) from traffic cycle (12),
G, stir by the four-bar mechanism of " tempering " counterclockwise, make crank (32) get back to initial position, the position of rocking bar (35) under drawing on cardboard;
H, pull down configuration tempering attachment screw (40), four-bar mechanism frame (37) is pulled back to initial position, four-bar mechanism frame (37) is fixed on traffic cycle (12) with frame gib screw (38);
I, again clockwise rotate (5) new angles of crank, repeating step D to G, until draw the position of 3 rocking bars (35); Take off cardboard, cross 3 location points at two ends hinge (34) center of rocking bar (35) and draw respectively two circles, the center of circle of these two circles is respectively the center of revolute pair between crank center of rotation and crank and connecting rod, the distance of center circle of two circles is crank (32) length, the center of circle of two circles is respectively four-bar mechanism frame (37) length and connecting rod (33) length with the distance at hinge center, rocking bar (35) two ends respectively, like this, realize known two side link corresponding angles, asked the problem of length of connecting rod and a side link length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085232.1A CN103824503B (en) | 2014-03-10 | 2014-03-10 | The experimental provision and experimental method of a kind of theory of mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410085232.1A CN103824503B (en) | 2014-03-10 | 2014-03-10 | The experimental provision and experimental method of a kind of theory of mechanisms |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103824503A true CN103824503A (en) | 2014-05-28 |
| CN103824503B CN103824503B (en) | 2017-12-12 |
Family
ID=50759535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410085232.1A Expired - Fee Related CN103824503B (en) | 2014-03-10 | 2014-03-10 | The experimental provision and experimental method of a kind of theory of mechanisms |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103824503B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021720A (en) * | 2014-06-10 | 2014-09-03 | 上海理工大学 | Epicyclic gear train experiment training aid |
| CN104064104A (en) * | 2014-07-08 | 2014-09-24 | 辽宁科技大学 | Reversal method teaching tool of epicyclic gear train |
| CN104123877A (en) * | 2014-07-04 | 2014-10-29 | 龙岩学院 | Displacement-profile generation demonstrator for cam mechanism |
| CN104200708A (en) * | 2014-09-04 | 2014-12-10 | 南昌大学 | Inversion method simulation and pressure angle analysis software platform |
| CN104282218A (en) * | 2014-10-20 | 2015-01-14 | 浙江理工大学 | Multi-mechanism single-model teaching tool for mechanical principle reversal method |
| CN104299508A (en) * | 2014-10-24 | 2015-01-21 | 西安科技大学 | Cam profile curve plotting demonstration instrument |
| CN104332096A (en) * | 2014-09-19 | 2015-02-04 | 杭州电子科技大学 | Direct-acting follower cam-gear train combination teaching aid |
| CN104332094A (en) * | 2014-09-17 | 2015-02-04 | 杭州电子科技大学 | Apparatus for drawing cam motion chart |
| CN104346990A (en) * | 2014-11-23 | 2015-02-11 | 王齐贤 | Novel wheel train training aid |
| CN104952351A (en) * | 2015-07-13 | 2015-09-30 | 刘晓 | Planet gear driven cam inverse rotation demonstration instrument |
| CN105319063A (en) * | 2014-08-05 | 2016-02-10 | 沃德(天津)传动有限公司 | Rotational speed ratio measurement instrument |
| CN106205342A (en) * | 2015-05-05 | 2016-12-07 | 南京农业大学 | Cam mechanism demonstrator |
| CN106875821A (en) * | 2017-04-27 | 2017-06-20 | 大连交通大学 | reversal process demonstration teaching aid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07270550A (en) * | 1994-03-31 | 1995-10-20 | Kikuichi:Kk | Table clock |
| CN2258302Y (en) * | 1996-10-18 | 1997-07-23 | 深圳市恩格劳普工贸有限公司 | Integrated mechanism modular set for experiment |
| CN2394279Y (en) * | 1999-04-01 | 2000-08-30 | 徐剑雄 | Transmission mechanism demonstrator |
| CN202041379U (en) * | 2011-04-21 | 2011-11-16 | 西北工业大学 | Experimental platform for multi-configuration planar link rod mechanisms |
| CN103278905A (en) * | 2013-06-03 | 2013-09-04 | 哈尔滨工业大学 | Mirror bracket mechanism which combines unconstraint driving chain with constraint driven chain |
| CN203759971U (en) * | 2014-03-10 | 2014-08-06 | 武昌工学院 | Experimental device for theory of mechanism |
-
2014
- 2014-03-10 CN CN201410085232.1A patent/CN103824503B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07270550A (en) * | 1994-03-31 | 1995-10-20 | Kikuichi:Kk | Table clock |
| CN2258302Y (en) * | 1996-10-18 | 1997-07-23 | 深圳市恩格劳普工贸有限公司 | Integrated mechanism modular set for experiment |
| CN2394279Y (en) * | 1999-04-01 | 2000-08-30 | 徐剑雄 | Transmission mechanism demonstrator |
| CN202041379U (en) * | 2011-04-21 | 2011-11-16 | 西北工业大学 | Experimental platform for multi-configuration planar link rod mechanisms |
| CN103278905A (en) * | 2013-06-03 | 2013-09-04 | 哈尔滨工业大学 | Mirror bracket mechanism which combines unconstraint driving chain with constraint driven chain |
| CN203759971U (en) * | 2014-03-10 | 2014-08-06 | 武昌工学院 | Experimental device for theory of mechanism |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021720A (en) * | 2014-06-10 | 2014-09-03 | 上海理工大学 | Epicyclic gear train experiment training aid |
| CN104123877A (en) * | 2014-07-04 | 2014-10-29 | 龙岩学院 | Displacement-profile generation demonstrator for cam mechanism |
| CN104064104A (en) * | 2014-07-08 | 2014-09-24 | 辽宁科技大学 | Reversal method teaching tool of epicyclic gear train |
| CN105319063A (en) * | 2014-08-05 | 2016-02-10 | 沃德(天津)传动有限公司 | Rotational speed ratio measurement instrument |
| CN104200708A (en) * | 2014-09-04 | 2014-12-10 | 南昌大学 | Inversion method simulation and pressure angle analysis software platform |
| CN104332094A (en) * | 2014-09-17 | 2015-02-04 | 杭州电子科技大学 | Apparatus for drawing cam motion chart |
| CN104332094B (en) * | 2014-09-17 | 2017-02-15 | 杭州电子科技大学 | Apparatus for drawing cam motion chart |
| CN104332096B (en) * | 2014-09-19 | 2017-02-08 | 杭州电子科技大学 | Direct-acting follower cam-gear train combination teaching aid |
| CN104332096A (en) * | 2014-09-19 | 2015-02-04 | 杭州电子科技大学 | Direct-acting follower cam-gear train combination teaching aid |
| CN104282218A (en) * | 2014-10-20 | 2015-01-14 | 浙江理工大学 | Multi-mechanism single-model teaching tool for mechanical principle reversal method |
| CN104299508A (en) * | 2014-10-24 | 2015-01-21 | 西安科技大学 | Cam profile curve plotting demonstration instrument |
| CN104299508B (en) * | 2014-10-24 | 2016-05-18 | 西安科技大学 | Cam profile curve is drawn demonstrator |
| CN104346990A (en) * | 2014-11-23 | 2015-02-11 | 王齐贤 | Novel wheel train training aid |
| CN104346990B (en) * | 2014-11-23 | 2018-02-13 | 李华良 | Train teaching aid |
| CN106205342A (en) * | 2015-05-05 | 2016-12-07 | 南京农业大学 | Cam mechanism demonstrator |
| CN104952351A (en) * | 2015-07-13 | 2015-09-30 | 刘晓 | Planet gear driven cam inverse rotation demonstration instrument |
| CN106875821A (en) * | 2017-04-27 | 2017-06-20 | 大连交通大学 | reversal process demonstration teaching aid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103824503B (en) | 2017-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103824503A (en) | Experimental device and method for mechanisms | |
| CN203759971U (en) | Experimental device for theory of mechanism | |
| CN202523298U (en) | Mapper for cam gear movement rules | |
| CN204650897U (en) | Mechanical principle multimachine structure interlock combined appliance for teaching | |
| CN104616580B (en) | Cam mechanism profile design and driven member kinetic characteristic Mapping Flat | |
| CN103985307B (en) | A kind of camming movement demonstrator | |
| CN108691436B (en) | A kind of ladder of swimming pool device | |
| CN104008694A (en) | Teaching aid for drawing contour curve of cam | |
| CN112138359A (en) | Automatic tennis ball recycling and launching device | |
| CN203812490U (en) | Teaching demonstration teaching aid for mechanical principle reversal method | |
| CN204010507U (en) | Mechanical principle Mechanism Combination teaching demonstration model | |
| CN103316449A (en) | Back pull-down training machine capable of generating electricity | |
| CN104029545A (en) | Two-dimensional automatic blackboard cleaning device | |
| CN205150148U (en) | Shock attenuation actuating mechanism of bicycle | |
| CN203910151U (en) | Cam contour curve drawing teaching aid | |
| CN205059919U (en) | Pedal type bicycle | |
| CN2366133Y (en) | Mechanical numeral skipping-rope | |
| CN204537606U (en) | Intellectual and interesting type cyclic train Synthetic educational appliance | |
| CN206051469U (en) | A kind of plane translation device | |
| CN104766531B (en) | Planet gear type material feed demonstrates mechanism | |
| CN105216955A (en) | A kind of pedal-type bicycle | |
| CN204189371U (en) | A kind of cam mechanism displacement-profile generates demonstrator | |
| CN203111425U (en) | Hand-cranking bicycle | |
| CN210574637U (en) | Mechanical rhythm demonstration ball jacking device | |
| CN207145565U (en) | A kind of transmission device for converting rotational motion to reciprocal change speed linear motion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171212 Termination date: 20180310 |