CN201796526U - Multifunctional frictional force demonstrating apparatus - Google Patents
Multifunctional frictional force demonstrating apparatus Download PDFInfo
- Publication number
- CN201796526U CN201796526U CN2010205567788U CN201020556778U CN201796526U CN 201796526 U CN201796526 U CN 201796526U CN 2010205567788 U CN2010205567788 U CN 2010205567788U CN 201020556778 U CN201020556778 U CN 201020556778U CN 201796526 U CN201796526 U CN 201796526U
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- friction
- box body
- upper plate
- friction block
- cartridge body
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Abstract
The utility model relates to an auxiliary teaching apparatus, in particular to a multifunctional frictional force demonstrating apparatus which aims at solving the problems that the physics teaching quality is influenced and the like since the existing teaching apparatus is hard to operate and low in visibility. The multifunctional frictional force demonstrating apparatus comprises an upper box body, a lower box body, a movable box cover, a front case cover and a back case cover, wherein a frictional faceplate is embedded on a top plate of the upper box body; one end of the frictional faceplate is provided with a small speed-reducing electrical machine and a clutch assembly, and the other end is provided with a friction block, a spring scale and an elastic touch piece, wherein a metal touch piece is fixed at the rear part of the friction block, the elastic touch piece is connected with a power supply loop of the small speed-reducing electrical machine in series, and the spring scale is connected with the small speed-reducing electrical machine by a traction pulling rope; the upper box body is internally provided with a conveyor belt driven by a speed-regulating electrical machine; and the top plate of the upper box body is provided with a through hole, which is equal with the conveyor belt in size and parallel with the conveyor belt, and a pointer type dynamometer is movably fixed on the top plate. The multifunctional frictional force demonstrating apparatus provides a demonstrating effect which is intuitional and visualized as well as vivid and interesting, has complete functions, is simple in structure, reasonable in design, convenient to operate, and low in manufacturing cost, and can be widely applied to the physics teaching.
Description
Technical field
The utility model relates to a kind of aided education instrument, is specially a kind of multi-functional friction force demonstration instrument.
Background technology
At present, in the physics lesson of middle school, the content of relevant friction force factor, it is gruelling that teachers feel if you tell it, because there is not visual in image instrument demonstration, the particularly demonstration of static friction is badly especially done experiment.When existing instrument is demonstrated, be on a plank, to move with the wood particle that hauling of spring balance level has a constant weight, read the reading on the spring balance again, thereby the friction force of drawing, the relation of weight and friction factor, in the above-mentioned presentation process, pulling force with pulling moving spring balance will remain level, and just can be constantly equal to friction force when wanting uniform motion, be difficult to handle and grasp, and the visual degree of spring balance scale is very low, does not a little further just see slightly, is not easy to operation and observation of students on the dais, in addition, its function singleness can't be demonstrated related experiment such as stiction, so many defectives of existing friction force demonstration instrument greatly influence the raising of physics quality of instruction.
Summary of the invention
Existing friction force demonstration instrument is difficult to handle grasp owing to unreasonable structure exists to the utility model, visual degree is low in order to solve, and influences problems such as physics quality of instruction, and a kind of multi-functional friction force demonstration instrument is provided.
The utility model is to adopt following technical scheme to realize: multi-functional friction force demonstration instrument, comprise respectively by upper plate, lower roof plate, the upper cartridge body that side shield constitutes, lower box body, with last, the movable lid that lower box body cooperatively interacts, preceding case lid and back box lid, offer storage tank on the upper plate of upper cartridge body, the embedded intrinsic friction panel of storage tank, friction panel one end is movably installed with deceleration small machine and the clutch assembly that is connected with external power source, the other end is placed with the friction block of rear portion fixing metal contact, the spring balance that is connected with friction block and being serially connected with on the deceleration small machine current supply circuit, and with the corresponding elastic contact blade in metal contact position, spring balance is connected with the deceleration small machine by the traction stay cord; The travelling belt that is driven by buncher is installed in the upper cartridge body, is had on the upper plate of upper cartridge body and travelling belt equal and opposite in direction, the equal through hole in position, on the upper plate and be positioned at driving-belt one side activity and be fixed with pointer dynamometer.
Adopt structural design of the present utility model, deceleration small machine and clutch assembly, spring balance, friction block are on the upper plate that is movably arranged on upper cartridge body, can arbitrarily dismantle, assemble, can be placed in the lower box body after the dismounting, can carry out static friction experiment and kinetic friction experiment after assembling, for the ease of picking and placeing these experiment annexes, can make the side shield of lower box body one end movable, and, can carry out the relation experiment of object smooth degree and friction force by changing the different various friction panels of smooth degree; In addition, friction block is placed on the travelling belt, also can carries out the experiment of object of which movement speed and friction force magnitude relationship by pointer dynamometer, not only easy and simple to handle, presentation process is visual in image, and function is more.
In order further to optimize the structure of this instrument, improve its function, the utility model has also carried out following structural design, the upper plate of described upper cartridge body and one of them side shield are hinged, hinged end is positioned at the end that friction block is installed, movable lid is vertical mutually with the hinged end of side shield with hinged end, the upper plate of upper cartridge body, and active box covers and is provided with upper plate inclined-plane number of degrees sign; The lower box body internal frame is provided with bull stick, is fixed with back up pad on the bull stick, and bull stick one end stretches out the lower box body sidewall, and gradient adjusting knob and lock nut are installed on the external part.This structural design, it is adjustable that the upper plate of upper cartridge body is designed to the gradient, rotate to an angle by gradient adjusting knob, bull stick rotation in this process, drive back up pad and rotate up equal angular,, make upper plate be tilting upper plate jack-up and fixing, and stand vertically the gradient that upper plate inclined-plane number of degrees sign that the active box in upper plate one side covers can show upper plate intuitively this moment, but in relation with demonstration friction and the rubbing surface gradient on the upper plate of certain slope.
Have pilot hole on the described upper plate, pointer dynamometer activity is plugged in the pilot hole, is convenient to installation and removal, and the time spent can not be placed in the lower box body pointer dynamometer.
The case lid bottom is hinged with lower box body before described, preceding case lid inside surface is equipped with sliding friction switch, static friction switch and the friction block speed governing knob that is serially connected with on the deceleration small machine current supply circuit, and the travelling belt motor switch and the travelling belt speed governing knob that are serially connected with on the travelling belt current supply circuit also are housed.These switches, speed governing knob respectively with the design of the physical circuit of motor current supply circuit, be that those of ordinary skills realize easily, when this preceding case lid is opened as handling platen.
Described clutch assembly comprises the stop pin that interts on deceleration small machine output shaft and is sleeved on sleeve on the output shaft that the sleeve wall front end offers the stop socket that cooperatively interacts with stop pin; The sleeve below is fixed with the separation fork, and the traction stay cord is wrapped on the sleeve.On the stop socket that utilizes barrel forward end and the motor output shaft combination of stop pin with separate, make experimental implementation very convenient, promote sleeve by separating fork before and after being convenient to.
Have groove on the described friction block, can be used for placing counterweight, the relation of plus-minus weights demonstration weight of object and friction force.
Compared with prior art, the utility model has solved all defect of existing friction force demonstration instrument, and demonstration effect visual pattern, vivid and interesting, multiple functional, can demonstrate whole experiments of relevant friction force knowledge with it, can excite the strong learning interest of student, the existing instruments used for education of its teaching efficiency order are too far behind to catch up, and simple in structure, reasonable in design, easy and simple to handle, cost of manufacture is low, can be widely used in the physics teaching.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation that draws small machine and clutch assembly thereof among Fig. 1;
Among the figure: the 1-upper plate; The 2-side shield; The 3-upper cartridge body; The 4-lower box body; The movable lid of 5-; Case lid before the 6-; The 7-storage tank; The 8-panel that rubs; The 9-external power source; 10-deceleration small machine; 11-metal contact; The 12-friction block; The 13-spring balance; The 14-elastic contact blade; 15-draws stay cord; The 16-travelling belt; The 17-through hole; 18-pointer-type dynamometer; 19-upper plate inclined-plane number of degrees sign; The 20-bull stick; The 21-back up pad; 22-gradient adjusting knob; The 23-pilot hole; 24-sliding friction switch; 25-static friction switch; 26-friction block speed governing knob; 27-travelling belt motor switch; 28-travelling belt speed governing knob; The 29-stop pin; The 30-sleeve; 31-stop socket; 32-separates fork; The 33-groove.
Embodiment
Multi-functional friction force demonstration instrument, as shown in Figure 1, comprise respectively by upper plate 1, lower roof plate, the upper cartridge body 3 that side shield 2 constitutes, lower box body 4, with last, the movable lid 5 that lower box body cooperatively interacts, preceding case lid 6 and back box lid, offer storage tank 7 on the upper plate 1 of upper cartridge body, the embedded intrinsic friction panel 8 of storage tank, friction panel one end is movably installed with deceleration small machine 10 and the clutch assembly that is connected with external power source 9, is furnished with speed adjusting resistance on the motor, regulate the movement velocity of friction block by friction block speed governing knob, allow relation between student's object of which movement speed directly perceived and the friction force, the other end is placed with the friction block 12 of rear portion fixing metal contact 11, the spring balance 13 that is connected with friction block and being serially connected with on the deceleration small machine current supply circuit, and with the corresponding elastic contact blade 14 in metal contact 11 positions, spring balance 13 is connected with deceleration small machine 10 by traction stay cord 15, have groove 33 on the friction block 12, be used to place counterweight, weldering one high post look light emitting diode on the zero degree groove of spring balance, weld an emitting red light diode at spring pointer center, it is luminous to connect the circuit diode during use, strengthened visual degree, the student also can see clearly from afar, and spring balance is erected on the upper plate by support; The travelling belt 16 that is driven by buncher is installed in the upper cartridge body 3, have on the upper plate 1 of upper cartridge body and travelling belt equal and opposite in direction, the equal through hole 17 in position, on the upper plate and be positioned at driving-belt one side activity and be fixed with pointer dynamometer 18, have pilot hole 23 on the upper plate 1, pointer dynamometer 18 activities are plugged in the pilot hole.
The upper plate 1 of upper cartridge body is hinged with one of them side shield 2, hinged end is positioned at the end that friction block 12 is installed, movable lid 5 is vertical mutually with the hinged end of side shield 2 with hinged end, the upper plate 1 of upper cartridge body 3, and movable lid 5 is provided with upper plate inclined-plane number of degrees sign 19; The lower box body internal frame is provided with bull stick 20, is fixed with back up pad 21 on the bull stick, and bull stick one end stretches out the lower box body sidewall, and gradient adjusting knob 22 and lock nut are installed on the external part.Above-mentioned hinged place all can adopt hinge to connect.
Preceding case lid 6 bottoms and lower box body 3 are hinged, preceding case lid inside surface is equipped with sliding friction switch 24, static friction switch 25 and the friction block speed governing knob 26 that is serially connected with on the deceleration small machine current supply circuit, and the travelling belt motor switch 27 and the travelling belt speed governing knob 28 that are serially connected with on the travelling belt current supply circuit also are housed.
As shown in Figure 2, clutch assembly comprises the stop pin 29 that interts on deceleration small machine output shaft and is sleeved on sleeve 30 on the output shaft that the sleeve wall front end offers the stop socket 31 that cooperatively interacts with stop pin; The sleeve below is fixed with separates fork 32, and traction stay cord 15 is wrapped on the sleeve 30.
Concrete use is as follows:
1, static friction experiment
Open movable lid on the instrument, take out annex one friction block and spring balance in the lower box body, allow the metal contact at friction block rear portion be against on the elastic contact blade gently, form closed circuit, and link mutually with spring balance, the pusher clutch sleeve makes it to separate with motor, and dragline stay cord one end catches on spring balance, the other end is wound on the sleeve, connect external power source, press the static friction switch, experiment effect: the deceleration small machine at the uniform velocity rotates, drag spring scale uniform motion, after spring extends certain-length, overcome stiction, friction block begins displacement, thereafter metal contact and elastic contact blade disconnect, and motor is stall at once.Data presented is the stiction data on the spring balance, and design has cleverly solved the difficult problem that can't carry out the static friction experiment on the physics lesson.
2, movable frictional experiment
Press the sliding friction switch, friction block is uniform motion on panel, and by following three kinds of methods experiment, experiment effect: weight of object, body surface smooth degree are the factors that influences the friction force size afterwards, and be irrelevant with the object contact area
A, on friction block, add counterweight, demonstration weight of object and friction force relation
The different friction panel of smooth degree below B, the replacing friction block, the relation of demonstration object smooth degree and friction force
C, put the relation of demonstration object contact area and friction force with friction block is perpendicular
Above-mentioned these three experiments also can demonstration in the static friction experiment.
3, the experiment of object of which movement speed and friction force magnitude relationship
Take out pointer dynamometer, be fixed in the pilot hole, friction block is put on the travelling belt, colluded the dynamometer stay cord, press the lower conveyor belt motor switch, the travelling belt setting in motion, record data, carousel speed governing knob, line speed is accelerated, record data.
4, the experiment of inclined-plane and friction force magnitude relationship
The instrument removable cover is vertically locked, according to movable frictional experiment each experiment annex is installed on the upper plate, press the sliding friction switch, friction block is uniform motion on the friction panel, rotation gradient adjusting knob, the bull stick rotation, drive back up pad and rotate up equal angular, with upper plate jack-up and fixing, make upper plate be tilting, and stand vertically the gradient that upper plate inclined-plane number of degrees sign that the active box in upper plate one side covers can show upper plate intuitively this moment, make upper plate form the inclined-plane of different gradient, record spring balance data.
Claims (6)
1. multi-functional friction force demonstration instrument, comprise respectively by upper plate (1), lower roof plate, the upper cartridge body (3) that side shield (2) constitutes, lower box body (4), with last, the movable lid (5) that lower box body cooperatively interacts, preceding case lid (6) and back box lid, it is characterized in that offering storage tank (7) on the upper plate (1) of upper cartridge body, the embedded intrinsic friction panel of storage tank (8), friction panel one end is movably installed with deceleration small machine (10) and the clutch assembly that is connected with external power source (9), the other end is placed with the friction block (12) of rear portion fixing metal contact (11), the spring balance that is connected with friction block (13) and being serially connected with on the deceleration small machine current supply circuit, and with the corresponding elastic contact blade in metal contact (11) position (14), spring balance (13) is connected with deceleration small machine (10) by traction stay cord (15); The travelling belt (16) that is driven by buncher is installed in the upper cartridge body (3), have on the upper plate of upper cartridge body (1) and travelling belt equal and opposite in direction, the equal through hole (17) in position, on the upper plate and be positioned at driving-belt one side activity and be fixed with pointer dynamometer (18).
2. multi-functional friction force demonstration instrument according to claim 1, the upper plate (1) that it is characterized in that upper cartridge body is hinged with one of them side shield (2), hinged end is positioned at the end that friction block (12) is installed, movable lid (5) is vertical mutually with the hinged end of side shield (2) with hinged end, the upper plate (1) of upper cartridge body (3), and movable lid (5) is provided with upper plate inclined-plane number of degrees signs (19); The lower box body internal frame is provided with bull stick (20), is fixed with back up pad (21) on the bull stick, and bull stick one end stretches out the lower box body sidewall, and gradient adjusting knob (22) and lock nut are installed on the external part.
3. multi-functional friction force demonstration instrument according to claim 1 and 2 is characterized in that having on the upper plate (1) pilot hole (23), and pointer dynamometer (18) activity is plugged in the pilot hole.
4. multi-functional friction force demonstration instrument according to claim 1 and 2, it is characterized in that preceding case lid (6) bottom is hinged with lower box body (4), preceding case lid inside surface is equipped with sliding friction switch (24), static friction switch (25) and the friction block speed governing knob (26) that is serially connected with on the deceleration small machine current supply circuit, and the travelling belt motor switch (27) and the travelling belt speed governing knob (28) that are serially connected with on the travelling belt current supply circuit also are housed.
5. multi-functional friction force demonstration instrument according to claim 1 and 2, it is characterized in that clutch assembly comprises the stop pin (29) that interts on deceleration small machine output shaft and is sleeved on sleeve (30) on the output shaft, the sleeve wall front end offers the stop socket (31) that cooperatively interacts with stop pin; The sleeve below is fixed with separates fork (32), and traction stay cord (15) is wrapped on the sleeve (30).
6. multi-functional friction force demonstration instrument according to claim 1 and 2 is characterized in that having on the friction block (12) groove (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205567788U CN201796526U (en) | 2010-09-30 | 2010-09-30 | Multifunctional frictional force demonstrating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205567788U CN201796526U (en) | 2010-09-30 | 2010-09-30 | Multifunctional frictional force demonstrating apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN201796526U true CN201796526U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205567788U Expired - Fee Related CN201796526U (en) | 2010-09-30 | 2010-09-30 | Multifunctional frictional force demonstrating apparatus |
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| Country | Link |
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| CN (1) | CN201796526U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578330A (en) * | 2012-07-27 | 2014-02-12 | 郭茂清 | All-purpose friction force exploration instrument |
| CN104064079A (en) * | 2014-07-18 | 2014-09-24 | 李钦琦 | Friction self-locking principle teaching test device and test method thereof |
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
| CN108847092A (en) * | 2018-07-10 | 2018-11-20 | 李明朗 | Experimental provision is used in the study of high school physics frictional force |
-
2010
- 2010-09-30 CN CN2010205567788U patent/CN201796526U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578330A (en) * | 2012-07-27 | 2014-02-12 | 郭茂清 | All-purpose friction force exploration instrument |
| CN103578330B (en) * | 2012-07-27 | 2016-01-20 | 郭茂清 | Friction force exploring instrument |
| CN104064079A (en) * | 2014-07-18 | 2014-09-24 | 李钦琦 | Friction self-locking principle teaching test device and test method thereof |
| CN104064079B (en) * | 2014-07-18 | 2016-03-02 | 李钦琦 | Friction self-locking theory teaching test unit and test method thereof |
| CN106023736A (en) * | 2016-07-30 | 2016-10-12 | 董亚伦 | Physics teaching aid |
| CN106023736B (en) * | 2016-07-30 | 2018-10-12 | 广州迅云教育科技有限公司 | Physics teaching teaching aid |
| CN108847092A (en) * | 2018-07-10 | 2018-11-20 | 李明朗 | Experimental provision is used in the study of high school physics frictional force |
| CN108847092B (en) * | 2018-07-10 | 2020-03-31 | 李明朗 | Experimental device for high school physics friction mechanics is learnt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110413 Termination date: 20120930 |