CN2258822Y

CN2258822Y - Multifunctional sinusoid drawing instrument

Info

Publication number: CN2258822Y
Application number: CN 96213492
Authority: CN
Inventors: 孙祥伟; 孙皞
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-08
Filing date: 1996-07-08
Publication date: 1997-08-06
Anticipated expiration: 2006-07-08

Abstract

The utility model relates to a multifunctional sinusoid instrument. A vibration guiding plate [13] fixed on a machine frame [1] of a parallel double crank mechanism is vertical to a connecting rod [8]; a pen [11] is arranged on a slide block vibrator [10] connected between slide troughs of the vibration guiding plate and the connecting rod; a crank synchronizing wheel [3] which is coaxial with a crank [4] is butted on an orbit plate [17], and the crank synchronizing wheel can be selected from a spare crank synchronizing wheel set [15] according to the value of a diameter; the useful length of the crank is adjusted by positioning nuts [7] on a connecting shaft of the crank and a connecting shaft of the connecting rod. When the machine frame moves along the orbit plate, the various types of images of sinusoid (cosine) functions and oscillograph traces can be drawn exactly on a piece of drawing paper or a blackboard. The utility model is also a physics teaching apparatus for demonstrating harmonic vibration.

Description

Multi-functional sine curve instrument

The utility model relates to a kind of drawing apparatus, a kind of specifically plotter that can just accurately make (surplus) chord curve on drawing or blackboard.

In teaching and engineering, often just to run into the mapping problem of (surplus) string functional picture.As describe object and do phenomenons such as simple harmonic oscillation and alternating current.Existing drawing method is trace-point method or binding curve plate described point normally, and the visual accuracy that work comes out is not high.And the plotter that can directly just accurately make (surplus) chord curve on drawing or blackboard does not occur in the prior art.

The purpose of this utility model provides a kind of plotter that can just accurately make (surplus) string functional picture on drawing or blackboard.

This sine curve instrument comprises: one by parallel double crank mechanism, the resonance device of leading the produced simple harmonic oscillation that vibration plate and slide block oscillator constitute, wherein, lead vibration plate and pasting the connecting rod of translation and perpendicular being fixed on the frame, the slide block oscillator is connected in connecting rod and leads intersection point place between the vibration plate, can promote the slide block oscillator when making the connecting rod translation and reciprocatingly slide leading on the vibration plate; Be connected with pen on the slide block oscillator; Also be provided with drive unit on above-mentioned frame, this device can change the displacement of relative drawing of this frame or blackboard the gyration of crank into, and makes the displacement of frame become certain proportional relation with the revolution number of times that crank is obtained.Crank up makes the connecting rod translation, and then promotes the slide block oscillator and slide leading on the vibration plate, and the displacement of slide block oscillator in sliding stroke changes with the change of the anglec of rotation of crank, and variation relation is deferred to the SIN function relation.And the crank anglec of rotation is proportional with the displacement of relative drawing of frame or blackboard, thereby the displacement of above-mentioned slide block oscillator is also deferred to SIN function with the relation of the displacement of frame.Therefore, the slide block oscillator is exactly sensu lato simple harmonic oscillation in the slip of leading on the vibration plate.The track of pen on drawing or blackboard on it is exactly smooth and (surplus) chord curve accurately just.

The above-mentioned displacement one that is provided with in the drive unit in frame regularly can make crank obtain the structure of different revolution number of times.The vibration frequency that in fact this changed the slide block oscillator makes this sine curve instrument can make just (surplus) chord curve of different cycles.

Crank is provided with the structure that can change its effective length, but the length of the sliding stroke of adjusting slider oscillator is to play the effect of regulating its amplitude.This make this just (surplus) chord curve instrument can make just (surplus) chord curve of various amplitude.

Because adopted resonance device and frequency modulation, modulation structure in the technical scheme, the utility model both can accurately have been made dissimilar just (surplus) chord curves on drawing or blackboard, be again a kind of physics educational apparatus that is used for demonstrating simple harmonic oscillation.It is simple in structure, uses very convenient.

Below in conjunction with accompanying drawing most preferred embodiment of the present utility model is elaborated.

Fig. 1 is a structure chart of the present utility model.

In Fig. 1, an end of crank [4] is connected on the frame [1] with straight pin [2].The geometrical axis of two cranks [4] all has a groove [5] in central authorities, its straight pin [6] that connects with connecting rod [8] is located in this groove removable, one end of this straight pin [6] is provided with screw thread and is furnished with setscrew nut [7], can be located in this groove [5] on the optional position.Distance between the straight pin [2] on the same frame of distance [1] two ends between the straight pin [6] on connecting rod [8] two ends equates that two cranks [4] are gone up straight pin [2] and regulated equal all the time with the distance between [6].This motion that has guaranteed connecting rod [8] is translation.Lead vibration plate [13] and pasting connecting rod [8] that translation and perpendicular, symmetry be fixed in the central authorities of frame [1], constitute firm cross structure.Be respectively equipped with chute [9] and [14] at the connecting rod and the geometrical axis of leading vibration plate to central authorities, slide block oscillator [10] is connected on the intersection point between two chutes, can slide therein.There is a sleeve [12] in central authorities on the slide block oscillator, and pen [11] wherein is housed, and can be pencil or chalk as required.Can establish a tension spring between pen and sleeve, to regulate the contact of pen [11] with drawing or blackboard.Drive unit is to be made of the crank synchronizing wheel [3] of a pair of identical size and a track plate [17].The shared straight pin of the same crank of crank synchronizing wheel [3] [4] [2] is connected on the two sides of frame [1], and is synchronous during their runnings.Track plate [17] is fixed in mapping on the drawing, and the cradle on it [18] makes itself and drawing keep appropriate space length, so that frame [1] can flatly move thereon by cursor slide [16] lift-launch of stretching and the tip of pen [11] is contacted with drawing.The periphery of crank synchronizing wheel [3] is conflicted on the limit of track plate [17], does not have thereon when frame [1] is mobile with skidding and rolls, thereby drive crank [4] and the motion of whole resonance device, and make pen [11] just make accurately (surplus) chord curve on drawing or blackboard.Crank synchronizing wheel [3] can be made gear mass, and track plate [17] is gone up correspondence and is provided with tooth bar; The rubber tire body that it is also wear-resisting does not have the rolling of skidding to obtain enough friction on the track plate.

Change the crank synchronizing wheel of different radii on the drive unit, can be when the displacement of frame [1] on track plate [17] be identical and the revolution number of times difference of crank [4].This has just changed the frequency of (surplus) chord curve of just doing.Therefore, the crank synchronizing wheel that can prepare some is right, and the radius of every centering is identical, and indicates radius value, and the radius between every pair is all different.Be located on the frame the synthetic a pair of identical synchronous wheels of tower crank [15] of their separate groups standby.The a pair of crank synchronizing wheel of required certain radius is from wherein selecting for use in the drawing.The crank synchronizing wheel is gone up available splined at straight pin [2], not only can rotate synchronously but also be convenient to change.

The effective length of crank [4] is that straight pin on it [6] can regulate the location of groove [5] lining straight pin [6] thereon by setscrew nut [7] with the distance between [2].This can change the amplitude of (surplus) chord curve of just doing.For this amplitude modulation is accomplished intuitively, quantitatively, can be 0 starting point with straight pin [2] on groove [5] next door, the highest distance position that can reach in groove [5] lining with straight pin [6] is that terminal point is put on length scale numerical value.The scale position at setscrew nut [7] place promptly is the value of the effective length of crank [4].

Before plotting, mix up this sine curve instrument earlier.As make the image of y=sinx, and the crank effective length is equated with the radius value of selected crank synchronizing wheel, can all be decided to be 1 unit length.Make the slide block oscillator be in the equilbrium position again and make the pen [11] be against on the origin of coordinates, moving frame can obtain the image of some cycles on the track plate.To put on coordinate system more then faster as making curve earlier.Make the visual the same of y=cosx, just the position difference in coordinate system.Make the visual the same of y=3sin (2x+ π), just the effective length of crank is decided to be 3 units, and select radius value for use is that the crank synchronizing wheel of  unit is right, the pen [11] that is in the equilbrium position is against on the x axle-pi/2 point on.Compare with trace-point method, simple and direct and accurate.

This sine curve instrument is except that can making all kinds of just (surplus) chord curves and oscillogram, owing to itself be a simple harmonic oscillation device, thereby still a kind of physics educational apparatus of demonstrating simple harmonic oscillation.Be exactly the vibration figure line of slide block oscillator as curve, i.e. displacement---time figure line.

The utility model is not subjected to the restriction of embodiment among the figure, all can change in many places.As connecting rod with lead vibration plate and can be designed to the guide rod shape, on the slide block oscillator to two vertical slide openings should be arranged; Crank also can be designed to discoid, by having dug many holes from the distance in the center of circle, also plays the amplitude modulation effect with coupler link on it; Can directly settle the synchronous wheels of tower crank [15] or other stepless frequency modulation structure on the straight pin [2].

Claims

1, a kind of sine curve instrument, it comprises: a parallel double crank mechanism, on the frame [1] of this mechanism, be fixed with the connecting rod [8] of this mechanism vertical and parallel with its translation face lead vibration plate [13], at connecting rod [8] with lead and be connected with slide block oscillator [10] on the vibration plate [13], this connection can promote slide block oscillator [10] and reciprocatingly slide leading on the vibration plate [13] when making connecting rod [8] translation; Be connected with pen [11] on the slide block oscillator [10]; Also be provided with the drive unit of the gyration of the crank [4] that the displacement of relative drawing of this frame [1] or blackboard can be changed into this mechanism by certain proportional relation on the frame of this mechanism [1].

2, sine curve instrument according to claim 1, connecting rod [8] and lead a chute [9], [14] are arranged respectively on the vibration plate [13], slide block oscillator [10] is connected between above-mentioned two chutes.

3, sine curve instrument according to claim 1, drive unit are to be made of an a pair of identical crank synchronizing wheel [3] and a track plate [17], and crank synchronizing wheel [3] is gone up coaxial the connection and rotational synchronization with crank [4] in frame [1]; Frame [1] goes up to stretch cursor slide [16], can carry at track plate [17] and upward move; Crank synchronizing wheel [3] is conflicted on track plate [17], makes frame [1] not have the rolling of skidding when mobile thereon along track plate [17].

4, sine curve instrument according to claim 3, crank synchronizing wheel [3] is the roller gear body, track plate [17] is gone up correspondence and is provided with rack structure.

5, sine curve instrument according to claim 3 is gone up standbyly by a pair of identical synchronous wheels of being made up of the crank synchronizing wheel of different radii respectively of crank [15] in frame [1], the crank synchronizing wheel on the drive unit is to from wherein selecting for use.

6, sine curve instrument according to claim 1, is the same crank of connecting rod [8] [4] connection the straight pin [6] that one end is provided with screw thread, is furnished with setscrew nut [7] on it, on crank [4], be provided with a groove [5], this straight pin [6] is located at groove [5] lining, and setscrew nut [7] can be located on the optional position of this groove [5] lining.