CN106910399A - A kind of novel centripetal force quantitative comparison and demonstration test instrument - Google Patents
A kind of novel centripetal force quantitative comparison and demonstration test instrument Download PDFInfo
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- CN106910399A CN106910399A CN201710155670.4A CN201710155670A CN106910399A CN 106910399 A CN106910399 A CN 106910399A CN 201710155670 A CN201710155670 A CN 201710155670A CN 106910399 A CN106910399 A CN 106910399A
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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
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
- G09B23/08—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics
- G09B23/10—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for statics or dynamics of solid bodies
Abstract
The present invention relates to novel centripetal force quantitative comparison and demonstration test instrument, including casing and rotating part；The beneficial effects of the invention are as follows：Rotating shaft is driven using motor, rotating speed (angular speed) is controlled using electric cabinet, article for rotation quality can be using the sizes of balls of different quality, the spheroid radius of gyration can be controlled by putting ball position to distance (radius of gyration) difference of rotating shaft, and demonstration centripetal force size can move down distance (different color rings or scale) and show by vertical direction sleeve under different situations.Be conducive to making up the relationship experiments device that big, current physics laboratory of middle school still lacks such a quantitative comparison and demonstration centripetal force size and correlative.
Description
Technical field
Patent of the present invention is related to experiment instrument, more particularly to a kind of novel centripetal force quantitative comparison and demonstration test instrument.
Background technology
Centripetal force is a key concept of high school physicses and university physicses mechanics part, the size and object of centripetal force
Quality, the distance of object to rotating shaft and rotation period (or angular speed) have relation, in order to verify centripetal force and this tittle
The relation of size, in the market with big, middle school physical experiment room demonstration centripetal force size and quality, radius and cycle (angle speed
Degree) between relation experiment instrument, be almost the laboratory apparatus that the double rotating shaft modes of hand-rail type are demonstrated.
The content of the invention
The purpose of the present invention is to overcome deficiency of the prior art, there is provided a kind of rational in infrastructure, good new of experiment effect
Centripetal force quantitative comparison and demonstration test instrument.
To realize above-mentioned technical purpose, present invention employs following technical scheme：
Novel centripetal force quantitative comparison and demonstration test instrument, including casing and rotating part；
Casing includes motor fixed case and motor；Rotating part includes scale lateral rotation bar, large radius pivot link branch
Strut, large radius pivot link, large radius pivot link carry ball seat, big minor radius pivot link transverse connecting rod, minor radius
Pivot link support bar, minor radius pivot link, minor radius pivot link carry ball seat, stayed mast, vertically hollow scale column,
Sliding sleeve, stayed mast movement lateral rotation axle chute, spring, scale lateral rotation rod locking bung flange, scale lateral rotation bar
Heelpiece retainer plate and stayed mast mobile chute；
Motor is fixed in motor fixed case, and scale lateral rotation bar heelpiece retainer plate is fixed on motor rotation axis bottom；
Scale lateral rotation rod set on motor rotation axis, positioned at scale lateral rotation bar heelpiece retainer plate top；Vertical hollow scale
Upright post sleeve on motor rotation axis, positioned at scale lateral rotation top；Vertical hollow scale column fixing end laterally turns with scale
Lever contact position is coincide, and scale lateral rotation bar is made with vertical hollow scale column one using scale lateral rotation rod locking bung flange
It is integrally formed with locking；Large radius pivot link support bar and minor radius pivot link support bar are sequentially arranged in scale lateral rotation
On bar；
The large radius that the rotary shaft mobile chute of large radius pivot link is arranged on large radius pivot link support bar is rotated
On connecting rod rotation axis；Minor radius pivot link rotates mobile chute and turns installed in minor radius with the minor radius pivot link of stayed mast
Rotated on axle between the minor radius pivot link and stayed mast of dynamic link supports bar；
The large radius that big minor radius pivot link transverse connecting rod two ends are connected to large radius pivot link rotates company
Bar is connected in rotary shaft with big minor radius pivot link transverse link, and minor radius pivot link minor radius pivot link with it is big
In minor radius pivot link transverse link connection rotary shaft；
Sliding sleeve and spring connector from lower spring end set to vertical hollow scale column, and with scale lateral rotation
Bar is locked using scale lateral rotation rod locking bung flange, and sliding sleeve lower end is provided with pulling force rod end and puts in mouth, and pulling force rod end puts in
Mouth is corresponding with the stayed mast mobile chute of vertical hollow scale column；The stayed mast end points of stayed mast one end is located at the slip cap mouth of pipe
In the interior stayed mast mobile chute of hollow scale column vertically.
As preferred：The casing upper surface is provided with spirit bubble, and body side is provided with drawer, and bottom half is provided with adjustable
Supporting leg.
As preferred：Electric cabinet, electric cabinet and motor connection are additionally provided with the casing.
The beneficial effects of the invention are as follows：Rotating shaft is driven using motor, rotating speed (angular speed) is controlled using electric cabinet, rotate thing
Weight (can be rotated by putting ball position using the sizes of balls of different quality, the spheroid radius of gyration to the distance of rotating shaft
Radius) difference controls, and centripetal force size is demonstrated under different situations can move down distance (different colours by vertical direction sleeve
Ring or scale) show.Be conducive to making up big, current physics laboratory of middle school still to lack such a quantitative comparison and drill
Show the relationship experiments device of centripetal force size and correlative.
Brief description of the drawings
Fig. 1 is front view of the present invention；
Fig. 2 is the figure of uniform circular motion rotation system last current state 1 of the present invention；
Fig. 3 is the figure of uniform circular motion rotation system last current state 2 of the present invention；
Fig. 4 is large radius pivot link structure front view of the present invention；
Fig. 5 is minor radius pivot link of the present invention and pulling force bar linkage structure front view；
Fig. 6 is hollow slide scale column front view vertically of the invention；
Fig. 7 is sliding sleeve of the present invention and spring entirety front view；
Fig. 8 is sliding sleeve of the present invention and spring entirety side view；
Fig. 9 be minor radius pivot link of the invention big, connecting rod rotation axis, stayed mast, vertical scale column, sliding sleeve,
Spring, carry the side views such as small ball seat and big minor radius pivot link support bar base and base fixed screw；
Figure 10 is two kinds of spheroid front views of experiment size of the present invention；
Figure 11 is experiment instrument casing of the present invention, scale rotating horizontal pole, big minor radius rotating bar support frame, the rotation of big minor radius
Connecting rod carries ball seat with stayed mast, big minor radius pivot link, hollow scale column, sliding sleeve and spring etc. are overlooked vertically
Figure；
Figure 12 is motor control box stereogram of the present invention；
Figure 13 is instrument base leveling support leg front view of the present invention.
Specific embodiment
The present invention is described further with reference to embodiment.The explanation of following embodiments is only intended to help and understands this
Invention.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, also
Some improvement and modification can be carried out to the present invention, these are improved and modification also falls into the protection domain of the claims in the present invention
It is interior.
As shown in figure 1, being centripetal force quantitative comparison and demonstration test instrument front view.1st, motor fixed case, 1-0, motor are solid
Determine case leveling support leg, 1-1, tank surface, 1-2, spirit bubble, (as shown in figure 11), 2, electric cabinet, 3, motor, 3-1, motor
Electrical transfer line, 4, experiment instrument repair part storage drawer, 5, scale rotating horizontal pole, 6, large radius pivot link support bar, 6-0,
Large radius pivot link support bar fixed seat, 7, large radius pivot link, 7-0, large radius pivot link rotary shaft are 7-1, more than half
Footpath pivot link is connected rotary shaft with big minor radius pivot link transverse link, and 7-2, the movement of large radius pivot link rotary shaft are slided
Groove, 7-3, large radius pivot link carry ball seat, and 8, big minor radius pivot link transverse link, 9, the support of minor radius pivot link
Bar, 9-0, minor radius pivot link support bar fixed seat, 10, minor radius pivot link, 10-0, minor radius pivot link and pulling force
Bar rotates axle jointly, and 10-1, minor radius pivot link are connected rotary shaft, 10-2 with big minor radius pivot link transverse link
Minor radius pivot link and stayed mast common rotation axis mobile chute, 11, minor radius pivot link carry ball seat, 12, stayed mast,
12-1, stayed mast end points, 12-2, stayed mast end points vertical shift rotary shaft (as shown in Figure 9), 13, vertically hollow scale column,
13-1, millimeter graduated scale (as shown in Figure 6), vertically 13-2, hollow scale column fixing end (as shown in Figure 6), 14, slip cap
Pipe, 14-0, sliding sleeve fix stayed mast vertical shift lateral rotation axis hole, and 14-1, pulling force rod end put in mouth (such as Fig. 8 institutes
Show), 15, stayed mast movement lateral rotation axle chute, 16, spring, 17, scale lateral rotation bar, vertically hollow scale column with
Spring fastening spiro loop, 18, scale lateral rotation bar heelpiece retainer plate；
It is big minor radius pivot link, connecting rod rotation axis, stayed mast, vertical scale column, slip cap as shown in figure (9)
Pipe, spring, carry the side views such as small ball seat and big minor radius pivot link support bar base and base fixed screw.5th, scale
Rotating horizontal pole, 5-1, scale rotating horizontal pole sectional view, 6-0, large radius pivot link support bar fixed seat, 7, large radius rotate connect
Bar, 7-0, large radius pivot link rotary shaft, 7-1, large radius pivot link are connected with big minor radius pivot link transverse link
Rotary shaft, 8, big minor radius pivot link transverse connecting rod, 9-0, minor radius pivot link support bar base, 9-0, big minor radius
Pivot link support bar base fixed screw, 10, minor radius pivot link, moved between 10-0, minor radius pivot link and stayed mast
Dynamic rotary shaft, 10-1, minor radius pivot link are connected rotary shaft with big minor radius pivot link transverse link, and 12, stayed mast,
12-1, stayed mast end points, 12-2, stayed mast end points vertical shift lateral rotation axle, 13, vertical scale column, 14, slip cap
Pipe, 16, spring, 17, scale lateral rotation rod locking bung flange, 19, stayed mast end mobile chute.
It is motor control box stereogram as shown in figure (12).2-1, switch, 2-2, indicator lamp, 2-3, setting motor are rotated
All number knobs, 2-4, beginning and conclusion button, 2-5, display motor rotate all digital display display screen, 2-6, display all number total times, 2-
7th, motor accelerates and deceleration knob；
The novel centripetal force quantitative comparison of the present embodiment is divided into experiment instrument control cabinet 2, casing (fixed electricity with demonstration test instrument
The iron chest of machine 3) with rotating part (machine shaft above section), casing is made up of motor fixed case 1, motor 3 and drawer 4,
Motor fixed case 1 is used for fixing motor 3, and experiment instrument control cabinet 2 is arranged in casing (in the chest of fixed motor 3), and scale is horizontal
The rotary shaft bottom of motor 3 is fixed on to rotating bar heelpiece retainer plate 18, scale rotating horizontal pole 5 is enclosed within the rotary shaft of motor 3, is located at
The top of scale lateral rotation bar heelpiece retainer plate 18, vertical hollow scale column 13 is enclosed within the rotary shaft of motor 3, is turned positioned at scale
The top of lever 5, makes vertical hollow scale column fixing end 13-2 be coincide with the contact position of scale rotating horizontal pole 5, using scale transverse direction
Scale rotating horizontal pole 5 is together locked and is integrally formed by rotating bar fastening spiro loop 17 with vertical hollow scale column 13；By large radius
Pivot link support bar 6, minor radius pivot link support bar 9 are sequentially arranged at the relevant position of scale rotating horizontal pole 5, and large radius turns
The rotary shaft mobile chute 7-2 of dynamic connecting rod 7 is arranged on the rotary shaft 7-0 of large radius pivot link support bar 6, and minor radius is rotated
Connecting rod 10 rotates mobile chute 10-2 and is arranged on minor radius pivot link support bar 9 with the minor radius pivot link of stayed mast 12
On rotary shaft 10-0, the large and small two ends of radius pivot link transverse connecting rod 8 are connected to the big of large radius pivot link 7
Radius pivot link is connected on rotary shaft 7-1 with big minor radius pivot link transverse link, and minor radius pivot link 10 is small
Radius pivot link is connected on rotary shaft 10-1 with big minor radius pivot link transverse link；Meanwhile, by sliding sleeve 14 and bullet
The connector of spring 16 covers to vertical hollow scale column 13 from the lower end 17 of spring 16, and it is whole with spring 16 to rotate sliding sleeve 14
Body, the sliding sleeve for being allowed to rotate sliding sleeve 14 fixes vertical shift rotational axis hole 14-0 with vertical hollow scale column 13
Stayed mast movement lateral rotation axle chute 15, and the pulling force rod end of rotation sliding sleeve 14 puts in mouthful 14-1 with vertical hollow mark
The correspondence of stayed mast end mobile chute 19 of chi column 13；The stayed mast end points 12-1 of the one end of stayed mast 12 is put in into sliding sleeve
In mouthfuls 14, vertically in the stayed mast mobile chutes 19 of hollow scale columns 13, then by stayed mast end points vertical shift rotary shaft 12-
2 sequentially pass through the side opening 14-0 of sliding sleeve 14, chute 15, the pulling force rod end of the one end of stayed mast 12 of vertical hollow scale column 13
Point 12-1 holes to the vertical another side chute 15 of hollow scale column 13, the another end hole 14-0 of sliding sleeve 14, and in sliding sleeve 14
Screwed down on stayed mast end points vertical shift rotary shaft 12-2 outside two stomidium 14-0.Constantly fine setting is needed in installation process
Between large radius pivot link support bar 6 and minor radius pivot link support bar 9 and minor radius pivot link support bar is to motor 4
The spacing of rotating shaft.
Laboratory operating procedures and principle
(1) regulating step, is tested
(1) adjusting base level.Three adjustable support leg 1-0 of regulation, are allowed to, and casing 1-1 surfaces are in spirit bubble 1-2
In the middle of circle；
(2) control line between control cabinet 2 and circular motor 3 is connected, and is switched on power；Wherein control cabinet is conventional control
Case, its internal circuit and structure belong to prior art, therefore do not illustrate.
(3) check and connected between " novel centripetal force quantitative comparison and demonstration test instrument ", it is ensured that each rotates between centers and rotates
Flexibly, there is no any problem；
(4) experiment big ball 2m used, bead m are got out, it is standby as testing.
(2) experimental principle, step and operating principle
1st, experimental principle
If the quality of the object that moves in a circle is m, the radius of gyration (i.e. distance of the object to rotating shaft) of object is r, makees even
Fast circular motion angular speed is ω (cycle T), then
F=m ω2R=m (4 π2)/T2r……(1)
From formula (1) as can be seen that object makees the centripetal force of uniform circular motion, it is directly proportional to mass of object m, with circumference
The angular velocity omega square of motion is directly proportional, i.e., with the cycle square T of uniform circular motion2It is inversely proportional, steady circular is made with object
The radius r of motion is directly proportional.We just verify the correctness of the formula (1) by testing below.
2nd, step and operating principle
Experiment one：Radius r, angular velocity omega are identical, different quality miObject centripetal force size compares
1st, it is m to set pellet quality, and big ball quality is 2m；Bead m, big ball 2m are individually placed to minor radius to carry on ball seat 11
Test；
2nd, the switch 2-1 buttons of control cabinet 2 are pressed, indicator lamp 2-2 is bright, rotary electric machine rotates all number knob 2-3 and sets motor
It is 50 circles to rotate all numbers, presses timing and starts to drive scale rotating horizontal pole 5 to rotate with conclusion button 2-4, the rotating shaft of motor 3；As schemed
(12) shown in.
3rd, spheroid m is placed on minor radius and carries on ball seat 11, and spheroid m centrifugal force increases, and minor radius pivot link 10 drives small
The bead m that radius is carried on ball seat 11 is rotated around rotary shaft 10-0 to the direction that radius increases, and is allowed to stayed mast 12 and is synchronously enclosed
In downward direction rotated around the rotate axle 10-0 common with minor radius connecting rod 10, the stayed mast end points 12-1 of stayed mast 12 drives
Vertical shift axle is moved down, and pulls the extrusion spring 16 of sliding sleeve 14 to move down, after stable, corresponding sliding sleeve 14
The amount of moving down is Δ x1, as shown in figure (9), (1), (2)；Same method quality is that the big ball of 2m is tested, and is observed corresponding
The amount of moving down of sliding sleeve 14 is Δ x2, as shown in figure (9), (1), (3).
This it appears that Δ x2＞ Δs x1, it was therefore concluded that it is：Radius r, angular velocity omega are identical, quality for 2m big ball to
Mental and physical efforts are big, and quality is small for the bead centripetal force of m.
Centripetal force size theoretical value is calculated：Quality is carried on ball seat 11 for the bead of m is placed on minor radius, if radius is
r1, centripetal force is f1=m ω2r1；Quality is carried on ball seat 11 for the big ball of 2m according to minor radius is placed on, and radius is according to being r1, centripetal force
It is f2=2m ω2r1；It can thus be appreciated that：f1＜ f2, it is bound to identical with experimental result.Wherein, ω=2 π/T, T=t/50, t are electricity
Machine rotates total time t (as shown in figure 12) that 50 circles read from fluorescent screen 2-6.
Experiment two：Angular velocity omega is identical, radius r different, and quality compares for the identical two articles centripetal force size of m
1st, quality is taken for the spheroid of m identicals two, is individually placed to minor radius and is carried ball seat 11 with large radius carrying ball seat 7-3
On, tested respectively；
2nd, the switch of control cabinet 2 2-1, indicator lamp 2-2 are pressed bright, rotary electric machine rotates all number knob 2-3 and sets motor rotation
All numbers 50 are enclosed, and are pressed timing and are started and conclusion button 2-4；As shown in figure (12).
3rd, motor 3 starts to rotate with angular velocity omega, and the rotating shaft of motor 3 drives scale rotating horizontal pole 5 to rotate, minor radius bearing ball
11 upper sphere m centrifugal force of seat increase, and minor radius pivot link 10 is common around between minor radius pivot link 10 and stayed mast 12
Rotate axle 10-0 to be rotated to the direction that radius increases, stayed mast 12 is common around between minor radius pivot link 10 and stayed mast 12
Rotated down with axle 10-0 is rotated, the stayed mast end points 12-1 of stayed mast 12 pulls vertical transverse shifting axle to move down,
The pressing spring 16 of sliding sleeve 14 is driven to move down, it can be observed that quality is for the corresponding amount of moving down of sliding sleeve 14 of m beads
Δx1, as shown in figure (9), (1), (2)；Then, quality is carried on ball seat 7-3 for m beads are placed on large radius again, motor 3 is adopted
Rotated with same angular velocity omega, drive scale rotating horizontal pole 5 to rotate, large radius carries bead centrifugal force on ball seat 7-3 to be increased,
Large radius pivot link 7 is rotated around axle 7-0 is rotated, and drives large radius to be carried on the back with minor radius pivot link transverse connecting rod 8
Moved to rotating shaft, pull minor radius pivot link 10 to be turned out, minor radius pivot link 10 is around minor radius pivot link 10
The axle 10-0 that rotates jointly between stayed mast 12 is rotated to the direction that radius increases, and stayed mast 12 is rotated around minor radius and connected
The axle 10-0 that rotates jointly between bar 10 and stayed mast 12 is rotated down, and the stayed mast end points 12-1 of stayed mast 12 is pulled vertically
Transverse shifting axle is moved down, and drives the pressing spring 16 of sliding sleeve 14 to move down, it can be observed that quality is that m beads are corresponding
The amount of moving down of sliding sleeve 14 is Δ x2, as shown in figure (9), (1), (3)；
This it appears that：Δx2＞ Δs x1, illustrate that angular velocity omega is identical, different radii two-phase homogenous quantities m objects
Centripetal force is of different sizes, and the big centripetal force of radius is big, and the small centripetal force of radius is small；
The calculating of centripetal force size theoretical value：If angular speed is ω, quality carries ball seat 11 for the spheroid of m is placed on minor radius
On, radius is r1(r1＜ r2) when, centripetal force f1=m ω2r1；Quality is carried on ball seat 7-3 for m spheroids are placed on large radius, radius
It is r2(r2＞ r1) when, centripetal force f2=m ω2r2；Thus, it is possible to draw a conclusion：f1＜ f2, it is bound to identical with experimental result.Its
In, ω=2 π/T, T=t/50, t are that motor rotates the total time t that 50 circles read from fluorescent screen 2-6, (as shown in figure 12).
Experiment three：Radius r, quality m are identical, the comparing of rotational angular velocity ω difference centripetal force sizes
1st, two beads that quality is m are taken, minor radius is put at twice and is carried on ball seat 11；Rotary electric machine accelerates at twice
With deceleration knob 2-7, different angular velocity omegas are respectively provided with1、ω2Tested；
2nd, the switch of control cabinet 2 2-1, indicator lamp 2-2 are pressed bright, rotary electric machine rotates all number knob 2-3 and sets motor rotation
All numbers 50 are enclosed, press timing start with conclusion button 2-4, such as figure (12) shown in；
3rd, the rotating shaft of motor 3 drives scale rotating horizontal pole 5 to rotate, and it is the spheroid of m with angle that minor radius carries ball seat 11 and improves quality
Speed omega1(ω1＜ ω2) rotate, due to spheroid m centrifugal actions, minor radius carries bead centrifugal force on ball seat 11 to be increased, small
Jointly rotate axle 10-0 of the radius pivot link 10 around between minor radius pivot link 10 and stayed mast 12 increases to radius
Direction rotate, jointly rotate axle 10-0 of the stayed mast 12 around between minor radius pivot link 10 and stayed mast 12 turn downwards
Dynamic, the stayed mast end points 12-1 of stayed mast 12 pulls vertical lateral rotation shifting axle 12-2 to move down, and drives sliding sleeve 14
Pressing spring 16 is moved down, it can be observed that quality is that the corresponding amount of moving down of sliding sleeve 14 of m beads is Δ x1, such as figure (9),
(1), shown in (2)；Then, quality is carried on ball seat 11 for m spheroids are placed on minor radius again, motor 3 uses angular velocity omega2(ω2
＞ ω1) rotate, drive scale rotating horizontal pole 5 to rotate, minor radius carries ball centrifugal force on ball seat 11 to be increased, and minor radius is rotated and connected
Jointly rotate axle 10-0 of the bar 10 around between minor radius pivot link 10 and stayed mast 12 is rotated to the direction that radius increases,
Jointly rotate axle 10-0 of the stayed mast 12 around between minor radius pivot link 10 and stayed mast 12 is rotated down, stayed mast 12
Stayed mast end points 12-1 pull vertical transverse shifting rotary shaft 12-2 to move down, drive the pressing spring 16 of sliding sleeve 14 downward
It is mobile, it can be observed that quality is that the corresponding amounts of moving down of sliding sleeve 14 of m are Δ x2, as shown in figure (9), (1), (3)；
This it appears that：Δx2＞ Δs x1, illustrate that two-phase homogenous quantities m spheroids are placed at same Radius r, if angular velocity omegai
Difference, then centripetal force is different, angular velocity omegaiBig centripetal force is big, angular velocity omegaiSmall centripetal force is small；
The calculating of centripetal force size theoretical value：During experiment, with the spheroid that quality is m, it is placed on minor radius and carries ball seat 11
On, if radius r at this1, motor rotational angular velocity is ω1(ω2＞ ω1) when, centripetal forceAngle speed used during experiment
It is ω to spend2(ω2＞ ω1) when, centripetal forceCalculating conclusion is：f1＜ f2, it is bound to and experimental result phase
Together.Change motor speed twice, motor rotates 50 circles respectively, total time respectively t twice can be read from fluorescent screen 2-61、
t2(t2＜ t1), ω=2/T, T=t/50, so ω1＜ ω2；(as shown in figure 12).
Centripetal force f sizes, are embodied by the amount of moving down of sliding sleeve 14, because the reaction force centrifugation of centripetal force
Power passes to the downward component of sliding sleeve one by lever principle, and applying a downward force compresses spring to spring makes spring contract
Short, spring force is directly proportional to the decrement of spring；Spring, by the calculating of elasticity of compression power, is according to Hooke's law F=k Δs
X, then F is exactly that the stayed mast end points 12-1 of stayed mast 12 acts on the size of the downward force of sliding sleeve 14, minor radius pivot link
10 rotate axle 10-2 jointly by minor radius pivot link and stayed mast 12 rotates, the stayed mast end points 12-1 of stayed mast 12
Vertical transverse shifting rotary shaft 12-2 is pulled downward on, downward component is put on sliding sleeve 14, and downward pressing spring is allowed to spring
Generation elastic deformation.
Claims (3)
1. a kind of novel centripetal force quantitative comparison and demonstration test instrument, it is characterised in that：Including casing and rotating part；
Casing includes motor fixed case (1) and motor (3)；Rotating part includes that scale lateral rotation bar (5), large radius are rotated and connects
It is horizontal that bar support bar (6), large radius pivot link (7), large radius pivot link carry ball seat (7-3), big minor radius pivot link
Ball seat is carried to connecting rod (8), minor radius pivot link support bar (9), minor radius pivot link (10), minor radius pivot link
(11), stayed mast (12), vertically hollow scale column (13), sliding sleeve (14), stayed mast movement lateral rotation axle chute
(15), spring (16), scale lateral rotation rod locking bung flange (17), scale lateral rotation bar heelpiece retainer plate (18) and stayed mast
Mobile chute (19)；
Motor (3) is fixed in motor fixed case (1), and scale lateral rotation bar heelpiece retainer plate (18) is fixed on motor (3) and turns
Moving axis bottom；Scale lateral rotation bar (5) is enclosed within motor (3) rotary shaft, positioned at scale lateral rotation bar heelpiece retainer plate
(18) top；Vertical hollow scale column (13) is enclosed within motor (3) rotary shaft, positioned at scale lateral rotation (5) top；Vertically
Hollow scale column (13) fixing end (13-2) is coincide with scale lateral rotation bar (5) contact position, using scale lateral rotation bar
Fastening spiro loop (17) makes scale lateral rotation bar (5) together be locked with vertical hollow scale column (13) to be integrally formed；Large radius
Pivot link support bar (6) and minor radius pivot link support bar (9) are sequentially arranged in scale lateral rotation bar (5)；
The rotary shaft mobile chute (7-2) of large radius pivot link (7) is arranged on the more than half of large radius pivot link support bar (6)
On footpath pivot link rotary shaft (7-0)；Minor radius pivot link (10) is rotated with the minor radius pivot link of stayed mast (12) and moved
Dynamic chute (10)-(2) are installed between the minor radius pivot link (10) and stayed mast (12) of minor radius pivot link support bar (9)
Rotate on axle (10-0)；
The large radius that big minor radius pivot link transverse connecting rod (8) two ends are connected to large radius pivot link (7) is rotated
Connecting rod is connected in rotary shaft (7-1) with big minor radius pivot link transverse link, and minor radius pivot link (10) minor radius
Pivot link is connected in rotary shaft (10-1) with big minor radius pivot link transverse link；
Sliding sleeve (14) is covered to vertical hollow scale column (13) with spring (16) connector from spring (16) lower end, and with
Using scale lateral rotation rod locking bung flange (17) locking, sliding sleeve (14) lower end is provided with pulling force to scale lateral rotation bar (5)
Rod end puts in mouth (14-1), and pulling force rod end puts in the stayed mast mobile chute of mouth (14-1) and vertical hollow scale column (13)
(19) correspondence；The stayed mast end points (12-1) of stayed mast (12) one end vertical hollow scale column in the slip cap mouth of pipe (14)
(13) in stayed mast mobile chute (19).
2. novel centripetal force quantitative comparison according to claim 1 and demonstration test instrument, it is characterised in that：On the casing
End face is provided with spirit bubble (1-2), and body side is provided with drawer (4), and bottom half is provided with adjustable support leg (1-0).
3. novel centripetal force quantitative comparison according to claim 1 and demonstration test instrument, it is characterised in that：In the casing
Electric cabinet (2) is additionally provided with, electric cabinet (2) is connected with motor (3).
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| CN201710155670.4A CN106910399A (en) | 2017-03-16 | 2017-03-16 | A kind of novel centripetal force quantitative comparison and demonstration test instrument |
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| CN201710155670.4A CN106910399A (en) | 2017-03-16 | 2017-03-16 | A kind of novel centripetal force quantitative comparison and demonstration test instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108062890A (en) * | 2018-01-16 | 2018-05-22 | 浙江大学城市学院 | A kind of novel centripetal force quantitative measurment experiment instrument |
| CN109147505A (en) * | 2018-10-12 | 2019-01-04 | 合肥磐石自动化科技有限公司 | A kind of mechanics apparatus for demonstrating |
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| CN109147505A (en) * | 2018-10-12 | 2019-01-04 | 合肥磐石自动化科技有限公司 | A kind of mechanics apparatus for demonstrating |
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