CN107578676B - A kind of inclined-plane acceleration test device - Google Patents

A kind of inclined-plane acceleration test device Download PDF

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Publication number
CN107578676B
CN107578676B CN201710842936.2A CN201710842936A CN107578676B CN 107578676 B CN107578676 B CN 107578676B CN 201710842936 A CN201710842936 A CN 201710842936A CN 107578676 B CN107578676 B CN 107578676B
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slide plate
electromagnet
trolley
adsorption piece
tilting slide
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CN107578676A (en
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王瀚论
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Abstract

The invention discloses a kind of inclined-plane acceleration test devices, including tilting slide plate, horizontal slide plate, dotted timer, paper tape and trolley;The lower end of tilting slide plate and horizontal slide plate drop-over, dotted timer are mounted on the top of tilting slide plate, and paper tape passes through dotted timer and is connected with the rear end of trolley;Trolley includes car body and arrestment mechanism;The rear portion of car body is equipped with hind axle, and the first adsorption piece is arranged in the middle part of hind axle;Arrestment mechanism includes power supply, the first electromagnet, mercury switch, tension spring and spring base;Power supply, the first electromagnet and mercury switch pass sequentially through conducting wire series connection, the front side of the first adsorption piece is arranged in first electromagnet, the rear portion of first electromagnet is provided with arc groove, and spring base is fixed on the front side of the first electromagnet, and the both ends of tension spring are connect with spring base and the first electromagnet respectively.Automatically by brake when moving of car of the invention to plane slide plate, braking is reliable and safe, efficiently avoids trolley and damages because of collision.

Description

A kind of inclined-plane acceleration test device
Technical field
The present invention relates to physical teaching aid technical fields, more particularly to a kind of experimental provision of inclined-plane acceleration.
Background technique
The acceleration that the purpose verifying trolley of inclined-plane acceleration test moves on inclined-plane, when trolley is placed on inclined-plane, Under gravity, the trolley on inclined-plane is scrolled down through along inclined-plane, and acceleration of gravity is straight down, to be parallel to inclined-plane Gravitational acceleration component is gsin θ, this is that the net acceleration of trolley after ignoring friction makes trolley to measure this acceleration From static starting, according to the rule of uniformly accelerated motion, the displacement difference in adjacent equal time interval is equal, △ S= aT2, can calculate actual since gravity accelerates acceleration caused by g.
Currently, for trolley in slide downward on inclined-plane, trolley can obtain a speed when doing inclined-plane acceleration test, In order to allow trolley to stop, one baffle generally is set in the lower end on inclined-plane, by the barrier effect of baffle so that trolley stops, In the process, trolley can generate a collision with baffle, often will appear the case where trolley is damaged in experiment, increase reality Test the cost of equipment.
Summary of the invention
For the defects in the prior art, the present invention provides a kind of experimental provisions of inclined-plane acceleration, so that trolley is transported Automatically by brake when moving to plane slide plate, braking is reliable and safety, can effectively avoid trolley and damages because of collision.
The present invention provides a kind of inclined-plane acceleration test device, including tilting slide plate, horizontal slide plate, dotted timer, Paper tape and trolley;The lower end of the tilting slide plate and horizontal slide plate drop-over, the dotted timer are mounted on tilting slide plate top Upper side, the paper tape passes through dotted timer and to be connected with the rear end of trolley;The trolley includes car body and arrestment mechanism; The front of the car body is equipped with front axle, and the both ends of the front axle are mounted on front wheel, after the rear portion of car body is equipped with Wheel shaft, the both ends of the hind axle are mounted on rear roller, and can adsorb with the first electromagnet the is arranged in the middle part of hind axle One adsorption piece;The arrestment mechanism includes being mounted on the intracorporal power supply of vehicle, the first electromagnet, mercury switch, tension spring and spring base; The power supply, the first electromagnet and mercury switch pass sequentially through conducting wire head and the tail series connection to be formed into a loop, and the mercury switch is in vehicle It is disconnected when body tilts so that the circuit disconnects, mercury switch is closed in car body level so that the circuit closed;First electricity The front side of the first adsorption piece is arranged in magnet, and it is recessed that the rear portion of the first electromagnet is provided with the arc to match with first adsorption piece Slot, the spring base are fixed on the car body on front side of the first electromagnet, and the both ends of the tension spring are electric with spring base and first respectively Magnet connection.
For trolley of the invention when free to slide on inclined-plane slide plate, dotted timer lays one every 0.02s on paper slip It is a, the displacement difference in mutually equal time interval can be measured by the paper slip got ready, to calculate since gravity adds Acceleration caused by fast g.Because of the relationship of gravity, the mercury droplet of mercury switch can flow away in lower place into container, this When the trolley of invention is located on tilting slide plate, the mercury droplet of mercury switch is at the position for disconnecting it, the first electromagnet In off-position, tension spring is pulled along the first electromagnet, so that the first electromagnet is separated with the first adsorption piece, arrestment mechanism is in Off position, trolley can be free to slide, when moving of car to horizontal slide plate, the angulation change of trolley, so that mercury is opened The mercury droplet of pass flows to the position for being closed it, and the first electromagnet is powered and generates adsorption capacity, the first electromagnet and first Attraction between adsorption piece is greater than the pulling force of tension spring, so that the first electromagnet is moved to the first adsorption piece, the first electromagnet Arc groove is contacted with the first adsorption piece, in this way, can be carried out certainly by the frictional force between arc groove and the first adsorption piece Dynamic, so that trolley slows down and stops, compared to traditional braking method by trolley and stop collision, braking of the invention is reliable And safety, it efficiently avoids trolley and is damaged because of collision.
Further, guide rail is installed, first electromagnet can front and back cunning on the car body of first electromagnet two sides It is mounted between two guide rails dynamicly.Guide rail can limit the first electromagnet left and right sidesing shifting, and the first electromagnet can only be between the guide rails It slides back and forth.
Further, it is covered with one layer of rubber slab in the arc groove of first electromagnet, when absorption, the first electromagnet It is contacted by the rubber slab with the first adsorption piece.Rubber slab can increase the frictional force to the first adsorption piece, promote braking effect Fruit.
Further, first adsorption piece is steel shaft set.
It further, further include bottom plate, the horizontal slide plate is mounted on bottom plate, and the lower end of the tilting slide plate passes through pin Axis is connect with horizontal slide plate, so that tilting slide plate can be rotated around pin shaft, is provided with below the tilting slide plate and is supported on this and inclines Pneumatic linear actuator between taper slide and bottom plate, the upper end of the pneumatic linear actuator and tilting slide plate are hinged, and the lower end of pneumatic linear actuator and bottom plate are cut with scissors It connects.It using the above structure, can be by the flexible tilt angle to control tilting slide plate of pneumatic linear actuator, so as to pass through difference The tilting slide plate of the gradient verifies acceleration, so that the data of experiment are richer.
Further, the side of the pin shaft is provided with protractor, and the center of circle of the protractor is located at the upper table of the bottom plate On the intersecting lens of face and the lower surface of tilting slide plate.By protractor, the tilt angle of tilting slide plate, user can be measured Just.
Further, elasticity transition plate, the elasticity are installed on the upside of the junction of the tilting slide plate and horizontal slide plate The rear side of transition plates is smoothly connected with tilting slide plate, and front side and the horizontal slide plate of elasticity transition plate are smoothly connected.Elasticity transition plate With elasticity, adjust the angle between tilting slide plate and horizontal slide plate anyway, elasticity transition plate can make tilting slide plate with Horizontal slide plate smoothly connects, to ensure that trolley smoothly slides into horizontal slide plate from tilting slide plate.
Further, the front end of the dotted timer is provided with the second electromagnet, and the rear end of the trolley is provided with can With the second adsorption piece of magnet absorption, second electromagnet mutually attracts with the second adsorption piece.Second electromagnet is powered, by beating Trolley is temporarily fixed to the corresponding position of tilting slide plate, the power-off of the second electromagnet by the second electromagnet suction effect of point timer Afterwards, the second adsorption piece loses the suction of the second electromagnet, and trolley is slided along tilting slide plate, convenient for controlling the initial velocity of trolley Degree.
Further, the dotted timer is spark timer.
The beneficial effects of the present invention are embodied in: automatically by brake when moving of car of the invention to plane slide plate, Braking is reliable and safe, effectively prevents trolley and damages because of collision.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Attached drawing needed in embodiment is briefly described.In all the appended drawings, similar device or part are generally by class As appended drawing reference identify.In attached drawing, each device or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of the present embodiment;
Fig. 2 is the schematic diagram of internal structure of the trolley of the present embodiment;
Fig. 3 is the structural schematic diagram of the arrestment mechanism of the present embodiment.
In attached drawing, 1 indicates tilting slide plate;2 indicate horizontal slide plate;3 indicate dotted timer;4 indicate paper tape;5 indicate small Vehicle;51 indicate car body;52 indicate front axle;53 indicate front wheel;54 indicate hind axle;55 indicate rear roller;56 indicate first Adsorption piece;57 indicate power supply;58 indicate the first electromagnet;581 indicate arc groove;582 indicate rubber slab;59 expression mercurys are opened It closes;510 indicate tension spring;511 indicate spring base;512 indicate conducting wire;513 indicate guide rail;6 indicate bottom plate;7 indicate pin shaft;8 tables Show pneumatic linear actuator;9 indicate protractor;10 indicate elasticity transition plate;11 indicate the second electromagnet;12 indicate the second adsorption piece.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation the protection model of limitation this patent It encloses.
As shown in Figure 1-Figure 3, the embodiment of the invention provides a kind of inclined-plane acceleration test device, including tilting slide plate 1, Horizontal slide plate 2, dotted timer 3, paper tape 4, trolley 5 and bottom plate 6, tilting slide plate 1 and horizontal slide plate 2 are installed on bottom plate 6, The lower end of tilting slide plate 1 and 2 drop-over of horizontal slide plate, the dotted timer 3 of the present embodiment are preferably spark timer, are got ready Timer 3 is mounted on the upper side on 1 top of tilting slide plate, and paper tape 4 passes through dotted timer 3 and is connected with the rear end of trolley 5, small For vehicle 5 when free to slide on inclined-plane slide plate, dotted timer 3 beats next point every 0.02s on paper slip, can be by getting ready Paper slip measure the displacement difference in mutually equal time interval, thus calculate due to gravity accelerate g caused by acceleration.
Referring to Fig. 2 and Fig. 3, trolley 5 includes car body 51 and arrestment mechanism, and the front of car body 51 is equipped with front axle 52, preceding The both ends of wheel shaft 52 are mounted on front wheel 53, and the rear portion of car body 51 is equipped with hind axle 54, and the both ends of hind axle 54 are respectively mounted There is rear roller 55, the middle part of hind axle 54 is arranged with the first adsorption piece 56 that can be adsorbed with the first electromagnet 58, the present embodiment First adsorption piece 56 is preferably steel shaft set;Arrestment mechanism includes the power supply 57 being mounted in car body 51, the first electromagnet 58, mercury Switch 59, tension spring 510 and spring base 511;Power supply 57, the first electromagnet 58 and mercury switch 59 pass sequentially through 512 head and the tail of conducting wire Series connection is to be formed into a loop, and mercury switch 59 is disconnected when car body 51 tilts so that the circuit disconnects, and mercury switch 59 is in car body 51 Closure is so that the circuit closed when horizontal;The front side of the first adsorption piece 56, the first 58 liang of electromagnet is arranged in first electromagnet 58 Guide rail 513 is installed, the first electromagnet 58 is mounted between two guide rails 513, leads in this way in which can slide back and forth on the car body 51 of side Rail 513 can limit 58 left and right sidesing shifting of the first electromagnet, and the first electromagnet 58 can only slide back and forth between guide rail 513, and first The rear portion of electromagnet 58 is provided with the arc groove 581 to match with the first adsorption piece 56, and spring base 511 is fixed on the first electromagnetism On the car body 51 of 58 front side of iron, the both ends of tension spring 510 are connect with spring base 511 and the first electromagnet 58 respectively.
Because of the relationship of gravity, the mercury droplet of mercury switch 59 can flow away in lower place into container, the present embodiment Trolley 5 when being located on tilting slide plate 1, the mercury droplet of mercury switch 59 is in the position for disconnecting it, the first electromagnet 58 In off-position, tension spring 510 is pulled along the first electromagnet 58, so that the first electromagnet is separated with the first adsorption piece 56, system Motivation structure is in off position, and trolley 5 can be free to slide, and when trolley 5 moves to horizontal slide plate 2, the angle of trolley 5 changes Become, so that the mercury droplet of mercury switch 59 flows to the position for being closed it, the first electromagnet is powered and generates adsorption capacity, the Attraction between one electromagnet and the first adsorption piece 56 is greater than the pulling force of tension spring 510, so that the first electromagnet is adsorbed to first Part 56 moves, and the arc groove 581 of the first electromagnet contacts with the first adsorption piece 56, in this way, can by arc groove 581 and Frictional force between first adsorption piece 56 carries out automatically, so that trolley 5 slows down and stops.
The present embodiment can cover one layer of rubber slab 582 in the arc groove 581 of the first electromagnet 58, when absorption, first Electromagnet 58 is contacted by rubber slab 582 with the first adsorption piece 56, and rubber slab 582 can increase the friction to the first adsorption piece 56 Power promotes braking effect.
The present embodiment is by the arrestment mechanism braking inside trolley 5, compared to traditional system by trolley 5 and stop collision The braking of dynamic method, the present embodiment is reliable and safe, efficiently avoids trolley 5 and damages because of collision.
The lower end of tilting slide plate 1 is connect by pin shaft 7 with horizontal slide plate 2, so that tilting slide plate 1 can be rotated around pin shaft 7, is inclined The lower section of taper slide 1 is provided with the pneumatic linear actuator 8 being supported between the tilting slide plate 1 and bottom plate 6, the upper end of pneumatic linear actuator 8 and inclination Slide plate 1 is hinged, the lower end of pneumatic linear actuator 8 and bottom plate 6 are hinged, in this way, tilting slide plate 1 can be controlled by the flexible of pneumatic linear actuator 8 Tilt angle, so as to verify acceleration by the tilting slide plate 1 of different gradient so that experiment data it is richer. The side of pin shaft 7 is provided with protractor 9, and the center of circle of the protractor 9 is located at the upper surface of bottom plate 6 and the lower surface of tilting slide plate 1 Intersecting lens on, by protractor 9, the tilt angle of tilting slide plate 1 can be measured, it is easy to use.
Elasticity transition plate 10 is installed on the upside of the junction of tilting slide plate 1 and horizontal slide plate 2, the elasticity transition plate 10 Rear side is smoothly connected with tilting slide plate 1, and front side and the horizontal slide plate 2 of elasticity transition plate 10 are smoothly connected, and elasticity transition plate 10 has It is flexible, the angle between tilting slide plate 1 and horizontal slide plate 2 is adjusted anyway, and elasticity transition plate 10 can make tilting slide plate 1 It is smoothly connect with horizontal slide plate 2, to ensure that trolley 5 smoothly slides into horizontal slide plate 2 from tilting slide plate 1.
The front end of dotted timer 3 is provided with the second electromagnet 11, and the rear end of trolley 5 is provided with can adsorb with magnet the Two adsorption pieces 12, the second electromagnet 11 attract with 12 phase of the second adsorption piece, and the second electromagnet 11 is powered, and pass through dotted timer 3 11 suction of the second electromagnet trolley 5 is temporarily fixed to the corresponding position of tilting slide plate 1, the power-off of the second electromagnet 11 Afterwards, the second adsorption piece 12 loses the suction of the second electromagnet 11, and trolley 5 is slided along tilting slide plate 1, convenient for control trolley 5 Initial velocity.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it is still It is possible to modify the technical solutions described in the foregoing embodiments, or some or all of the technical features is carried out Equivalent replacement;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side The range of case should all cover within the scope of the claims and the description of the invention.

Claims (9)

1. a kind of inclined-plane acceleration test device, it is characterised in that:
Including tilting slide plate, horizontal slide plate, dotted timer, paper tape and trolley;
The lower end of the tilting slide plate and horizontal slide plate drop-over, the dotted timer are mounted on the upside on tilting slide plate top Face, the paper tape pass through dotted timer and are connected with the rear end of trolley;
The trolley includes car body and arrestment mechanism;
The front of the car body is equipped with front axle, and the both ends of the front axle are mounted on front wheel, the rear portion installation of car body There is hind axle, the both ends of the hind axle are mounted on rear roller, and being arranged in the middle part of hind axle can adsorb with the first electromagnet The first adsorption piece;
The arrestment mechanism includes being mounted on the intracorporal power supply of vehicle, the first electromagnet, mercury switch, tension spring and spring base;It is described Power supply, the first electromagnet and mercury switch pass sequentially through conducting wire head and the tail series connection to be formed into a loop, and the mercury switch inclines in car body It is disconnected when tiltedly so that the circuit disconnects, mercury switch is closed in car body level so that the circuit closed;First electromagnet The front side of first adsorption piece is set, the rear portion of the first electromagnet is provided with the arc groove to match with first adsorption piece, The spring base is fixed on the car body on front side of the first electromagnet, the both ends of the tension spring respectively with spring base and the first electromagnet Connection.
2. acceleration test device in inclined-plane according to claim 1, it is characterised in that: the vehicle of first electromagnet two sides Guide rail is installed, first electromagnet is mounted between two guide rails in which can slide back and forth on body.
3. acceleration test device in inclined-plane according to claim 1 or 2, it is characterised in that: the arc of first electromagnet It is covered with one layer of rubber slab in connected in star, when absorption, the first electromagnet is contacted by the rubber slab with the first adsorption piece.
4. acceleration test device in inclined-plane according to claim 3, it is characterised in that: first adsorption piece is steel shaft Set.
5. acceleration test device in inclined-plane according to claim 1, it is characterised in that: it further include bottom plate, it is described horizontal sliding Plate is mounted on bottom plate, and the lower end of the tilting slide plate is connect by pin shaft with horizontal slide plate, so that tilting slide plate can be around pin shaft It rotates, is provided with the pneumatic linear actuator being supported between the tilting slide plate and bottom plate below the tilting slide plate, the pneumatic linear actuator Upper end is hinged with tilting slide plate, and the lower end of pneumatic linear actuator and bottom plate are hinged.
6. acceleration test device in inclined-plane according to claim 5, it is characterised in that: the side amount of being provided with of the pin shaft The center of circle of angle device, the protractor is located on the intersecting lens of the upper surface of the bottom plate and the lower surface of tilting slide plate.
7. acceleration test device in inclined-plane according to claim 5, it is characterised in that: the tilting slide plate and horizontal slide plate Junction on the upside of elasticity transition plate is installed, rear side and the tilting slide plate of the elasticity transition plate are smoothly connected, elasticity transition The front side of plate is smoothly connected with horizontal slide plate.
8. acceleration test device in inclined-plane according to claim 1, it is characterised in that: the front end of the dotted timer is set Be equipped with the second electromagnet, the rear end of the trolley is provided with the second adsorption piece that can be adsorbed with magnet, second electromagnet with Second adsorption piece mutually attracts.
9. acceleration test device in inclined-plane according to claim 8, it is characterised in that: the dotted timer is electric spark Timer.
CN201710842936.2A 2017-09-18 2017-09-18 A kind of inclined-plane acceleration test device Active CN107578676B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107958621A (en) * 2018-01-25 2018-04-24 杨曙铭 A kind of mechanics apparatus for demonstrating
CN108550307B (en) * 2018-07-02 2023-06-23 广东电网有限责任公司 Mobile side-tipping vehicle
CN109118905B (en) * 2018-10-18 2020-06-23 潘天宇 Physical experiment demonstration instrument
CN109859581B (en) * 2019-04-03 2021-02-12 潘洁熙 Contrast tool for high school physics uniform variable speed motion experiment

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CN2413328Y (en) * 1999-12-08 2001-01-03 王郁知 Newton's second law demonstrating device
CN101170273A (en) * 2006-10-24 2008-04-30 陈祖茂 Magnetic force braking device
CN102509495A (en) * 2011-11-25 2012-06-20 长春工业大学 Verification device for Newton second law
JP2012228120A (en) * 2011-04-21 2012-11-15 Railway Technical Research Institute Railway rail brake cum contactless power supply apparatus
CN203773798U (en) * 2014-04-02 2014-08-13 石小明 A ticker timer experiment control device
CN104554415A (en) * 2015-01-26 2015-04-29 昆山威凯儿童用品有限公司 Brake system of stroller

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2413328Y (en) * 1999-12-08 2001-01-03 王郁知 Newton's second law demonstrating device
CN101170273A (en) * 2006-10-24 2008-04-30 陈祖茂 Magnetic force braking device
JP2012228120A (en) * 2011-04-21 2012-11-15 Railway Technical Research Institute Railway rail brake cum contactless power supply apparatus
CN102509495A (en) * 2011-11-25 2012-06-20 长春工业大学 Verification device for Newton second law
CN203773798U (en) * 2014-04-02 2014-08-13 石小明 A ticker timer experiment control device
CN104554415A (en) * 2015-01-26 2015-04-29 昆山威凯儿童用品有限公司 Brake system of stroller

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