CN211390745U - Variable base circle follow-up involute demonstration and image drawing instrument - Google Patents

Abstract

The utility model discloses a become base circle follow-up formula demonstration and image drawing appearance of gradually bursting at seams provides one kind and can found the base circle fast, can demonstrate the motion process and the orbit characteristic of moving point through the change of light spot on the circular arc, can draw the result of demonstration into the image in step, can solve different base circles or same base circle arbitrary point's demonstration and image drawing etc. of gradually bursting at seams. Comprises a chassis, a drawing board, a positioning rod, a base circle constructor, a curve lamp, a radial rotating rod, a line generating track plate, a painting brush, a winding wheel disc and a connecting rope with a clamp. The device comprises: the operation is simple, and the demonstration process is real and intuitive; the structure is compact, the cost is low, and the carrying is convenient; the applicability is strong: the method is suitable for teaching, engineering design, machining and the like.

Description

Variable base circle follow-up involute demonstration and image drawing instrument

Technical Field

The utility model relates to a teaching instrument, especially a become base circle follow-up demonstration and image drawing appearance of gradually bursting at seams.

Background

Involutes, which are important for university mathematical derivative applications, are curves that intersect all tangents to a curve at right angles, and are widely used in practice, e.g., circular involutes are a common type of curve in mechanical mapping. In the process of rolling a moving straight line (generating line) along a fixed circle (base circle) on a plane, the track of any point on the straight line forms an involute. Involutes are often involved in teaching processes in the mechanical field. Particularly, when teaching the tooth profile of the involute gear, an involute curve needs to be accurately drawn on a blackboard or a wall map, however, the involute curve is often drawn by a teacher in free hands in the actual teaching process, and a simple tool suitable for drawing the involute curve in a classroom is not provided at present. Manually drawing the involute easily wastes classroom time, and often the shape is not very standard, sometimes can influence the teaching effect. Engineering designers draw drawings, machining personnel process parts and the like, all need fast and convenient drawing tools, and efficiency and precision are improved. Teachers urgently need some scientific teaching aids or measuring tools to assist teaching, and engineering technicians need drawing tools with convenience and high automation.

In order to solve the above problems, a few devices related to the involute aspect appear in the near stage, for example, patent application No. 201720420699.6 discloses an involute plane drawing instrument, which comprises a straight ruler, a positioning pillar, a vertical suspension arm, a horizontal shaft and the like, wherein a plurality of gears are arranged on each horizontal shaft to form a gear transmission pair, a friction wheel is coaxially connected with an input gear of the gear transmission pair, the friction power is transmitted to a rack meshed with an output gear after the transmission of the gear transmission pair, a drawing pen is arranged below the rack, and the pen point of the drawing pen is in circumferential contact with the left end face of the friction wheel. The tangential rolling described in the involute definition is decomposed into circular motion and linear motion tangential to the circular motion, so that a standard involute can be drawn, and the motion composition relation during generation of the involute can be visually embodied. The technology is important to finish drawing by using friction and gears, does not reflect tangential line expansion and synchronous follow-up of circular arcs, and has insufficient applicability that the radius of a base circle is fixed and an involute of any base circle cannot be drawn quickly. "the combination formula plotter that gradually bursts at seams and ellipse" has been given in patent application number 201710379698.6's literature, including gear box, vertical support piece, the drawing device that gradually bursts at seams, oval drawing device, the drawing device that gradually bursts at seams includes bull stick, guide rail pole, synchronous pulley, slider, drawing pen, connecting rod, movable block, overspeed device tensioner, drive synchronous pulley, oval drawing device includes cantilever, fixed axle, lateral shifting piece, dead lever, carriage, synchronous pulley, gear wheel, pinion, painting brush montant, painting brush bull stick, oval painting brush. Although the curve drawing instrument can draw two curves, the forming process and the moving point track characteristic of an involute cannot be demonstrated, an arbitrary base circle cannot be quickly constructed, the change process of an arc is not reflected, and the applicability is not high.

SUMMERY OF THE UTILITY MODEL

For solving the technical problem, the utility model discloses the technical scheme who adopts as follows:

the variable base circle follow-up involute demonstration and image drawing instrument comprises a chassis, a drawing board, a positioning rod, a base circle constructor, a curve lamp, a radial rotating rod, a generating line rail plate, a painting brush, a winding wheel disc and a connecting rope with a clamp, wherein the drawing board is arranged on the chassis, the positioning rod is arranged on the drawing board, the base circle constructor, the radial rotating rod and the winding wheel disc are all arranged on the positioning rod, the curve lamp is arranged on the base circle constructor, the generating line rail plate is arranged on the radial rotating rod, the painting brush is arranged on the generating line rail plate, and the connecting rope with the clamp is used for connecting the painting brush and the base circle constructor into a whole;

the positioning rod comprises a third rectangular plate, a first round pipe, a first round shaft rod, a protractor, a second sliding block and a first circular ring disc, the left end of the third rectangular plate is provided with the first round hole, the first round hole is internally provided with the first round pipe, the first round pipe is internally provided with a cylindrical spotlight, the middle part of the third rectangular plate is provided with the first round shaft rod, the first circular ring disc, the protractor and an isolating pipe sleeve are sequentially arranged on the first round shaft rod from front to back, the protractor comprises a fourth rectangular plate, a first circular ring disc and a first fan ring, the two ends of the fourth rectangular plate are provided with the first fan ring plates, the first fan ring plates are partial circular rings formed by major arcs, the surface of the first fan ring plate is provided with a second scale and a tail end second nail hole, the second scale is a radial angle line, the surface of the fourth rectangular plate is provided with the first scale, the first round shaft rod is symmetrically provided with the protractor from top to bottom, the first fan ring plate can be sleeved outside the first circular pipe, a second rectangular groove is formed in the other end of the fourth rectangular plate, a second sliding block is arranged in the second rectangular groove, and a third rectangular groove is formed in the left side of the second rectangular groove;

according to the further technical scheme, the third rectangular plate is a hard straight plate strip;

according to a further technical scheme, the fourth rectangular plate is a transparent hard thin plate;

compared with the prior art, the utility model has the advantages that:

compared with the prior art, the utility model, its beneficial effect is:

1. the utility model discloses a become base circle follow-up formula demonstration and image drawing appearance of gradually bursting at seams, easy operation as long as push away and change handle and just can accomplish all demonstrations, compositions.

2. The utility model discloses a become base circle follow-up formula demonstration of gradually bursting at seams and image drawing appearance, it is multiple functional: the construction of different base circles can be completed, the arc can be unfolded into a straight line along a tangent line to form a generating line, and the involute trajectory can be synchronously drawn into an involute; the demonstration process is real and intuitive; the applicability is strong: the demonstration and the image drawing can be carried out at any visual angle in various occasions. The method is suitable for teaching, engineering design, machining and the like.

3. At present, no such product is available on the market, and the variable base circle follow-up involute demonstration and image drawing instrument is compact in structure, low in cost, safe, reliable and light.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the middle chassis of the present invention.

Fig. 3 is a schematic structural diagram of the middle drawing board of the present invention.

Fig. 4 is a schematic structural diagram of the middle positioning rod of the present invention.

Fig. 5 is a schematic structural diagram of the middle base circle constructor of the present invention.

Fig. 6 is a schematic structural view of the middle curve lamp of the present invention.

Fig. 7 is a schematic structural view of the middle radial rotating rod of the present invention.

Fig. 8 is a schematic structural view of the line generating rail plate of the present invention.

Fig. 9 is a schematic structural diagram of a painting brush in the present invention.

Fig. 10 is a schematic structural view of the winding wheel disc of the present invention.

Fig. 11 is a schematic structural view of the middle belt buckle connecting rope of the present invention.

In the drawings: 1-a chassis, 11-a first rectangular plate, 12-an upper bottom plate surface, 13-a dovetail groove, 14-a first screw, 15-a first nut and 16-a prismatic table base; 2-a drawing board, 21-a second rectangular plate, 22-dovetail wedge strips, 23-a first rectangular groove, 24-a first sliding block, 25-a first support rod, 26-a paper clamping device and 27-an arc baffle; 3-positioning rod, 31-third rectangular plate, 32-first circular tube, 33-first circular shaft rod, 34-protractor, 35-second slide block, 36-second rectangular groove, 37-third rectangular groove, 38-fourth rectangular plate, 39-first circular disc, 310-first sector plate, 311-first scale, 312-second scale, 313-first nail hole, 314-isolation pipe sleeve, 315-first circular hole and 316-cylindrical spotlight; 4-base circle constructor, 41-second round pipe, 42-second round ring plate, 43-third round pipe, 44-third round ring plate, 45-first pressing bar, 46-first pin, 47-first notch, 48-fourth round pipe, 49-first handle, 410-cuboid wedge, 411-inner inserted rocking pipe and 412-first belt wheel; 5-curve lamp, 51-first soft rope, 52-optical fiber, 53-diode lamp, 54-fifth circular tube, 55-fourth circular ring disc, 56-fifth circular ring disc, 57-sixth circular tube, 58-second pin, 59-first wiring hole, 510-second nut and 511-power interface; 6-radial rotating rod, 61-fifth rectangular plate, 62-seventh circular tube, 63-second handle, 64-third slide block, 65-sixth rectangular plate, 66-fourth rectangular groove, 67-first pulley and 68-seventh rectangular plate; 7-generation track plate, 71-eighth rectangular plate, 72-ninth rectangular plate, 73-fourth sliding block, 74-tenth rectangular plate, 75-second screw, 76-second pulley, 77-ball, 78-second round hole, 79-fifth rectangular groove and 710-third pulley; 8-painting brush, 81-threaded pipe, 82-round pen holder, 83-pen point, 84-first spring, 85-sixth ring disc, 86-third nut, 87-fourth nut, 88-second wiring hole and 89-third wiring hole; 9-a winding wheel disc, 91-a seventh circular tube, 92-a seventh circular disc, 93-an eighth circular disc, 94-a second circular shaft rod, 95-a fifth sliding block, 96-a third handle, 97-a second pressing strip and 98-a second soft rope; 10-connecting rope with clamp, 101-eleventh rectangular plate, 102-first inner inserting pull rod, 103-second inner inserting pull rod, 104-twelfth rectangular plate, 105-square tube barrel, 106-second spring, 107-ninth circular disc, 108-fourth wiring hole and 109-third soft rope.

Detailed Description

The technical solution of the present invention is explained in detail below, but the scope of protection of the present invention is not limited to the embodiments.

As shown in fig. 1-11, the variable base circle follow-up involute demonstration and image drawing instrument comprises a chassis 1, a drawing board 2, a positioning rod 3, a base circle constructor 4, a curve lamp 5, a radial rotating rod 6, a line generating rail plate 7, a painting brush 8, a winding wheel disc 9 and a connecting rope with a clip 10.

Drawing board 2 is arranged in on the chassis 1, and on drawing board 2 was arranged in to locating lever 3, the locating lever 3 was all arranged in to base circle constructor 4, radial bull stick 6 and wire winding rim plate 9 on, base circle constructor 4 was arranged in to curved lamp 5, take place line rail board 7 and arrange in on radial bull stick 6, on line rail board 7 was arranged in to painting brush 8, take the card even cable 10 to link painting brush 8 and base circle constructor 4 as an organic whole.

As shown in fig. 1 and 2, the chassis 1 includes a first rectangular plate 11, a first screw 14, a first nut 15, and a terrace with edge base 16, the first rectangular plate 11 is a flat thick hard plate, a dovetail groove 13 is provided in the middle of an upper base plate surface 12 of the first rectangular plate 11, the cross section of the dovetail groove 13 is trapezoidal, 4 corners of a lower base surface of the first rectangular plate 11 are respectively provided with the first screw 14, the other end of the first screw 14 is provided with the terrace with edge base 16, the first nut 15 is sleeved in the middle of the first screw 14, the first nut 15 can control the vertical displacement of the terrace with edge base 16, and the first screw 14 is respectively located at four corners of the lower base plate surface 17.

As shown in fig. 1 and 3, the drawing board 2 includes a second rectangular board 21, a dovetail strip 22, a first slider 24, a first stay bar 25, and a cardboard fixer 26, where the second rectangular board 21 is a straight rectangular hard board, a lower bottom surface of the second rectangular board 21 is provided with the dovetail strip 22, and the dovetail strip 22 is an isosceles trapezoid regular prism matched with the dovetail groove 13. The right-hand member of second rectangular plate 21 is equipped with first rectangle slot 23, be equipped with the first slider 24 of matching in the first rectangle slot 23, be equipped with pin tool to lock on the first slider 24, be equipped with fixed first vaulting pole 25 of vertically with it on the first slider 24, be equipped with circular arc baffle 27 that can rotate on the arris on the left side of second rectangular plate 21, second rectangular plate 21 surface is equipped with card paper ware 26, card paper ware 26 is the rectangle and distributes, on four angles of rectangle.

The drawing board 2 is formed by inserting a dovetail strip 22 into a dovetail groove 13 of the chassis 1, and the paper clamping device 26 is arranged on the front side.

As shown in fig. 1 and 4, the positioning rod 3 includes a third rectangular plate 31, a first circular tube 32, a first circular shaft rod 33, a protractor 34, a second slider 35, and a first circular ring disk 39, the third rectangular plate 31 is a hard straight plate strip, a first circular hole 315 is disposed at the left end of the third rectangular plate 31, the first circular tube 32 is disposed in the first circular hole 315, a cylindrical spotlight 316 is disposed in the first circular tube 32, and a light beam emitted by the cylindrical spotlight 316 having a switch points rearward. A first round shaft rod 33 is arranged in the middle of the third rectangular plate 31, the first round shaft rod 33 is sequentially provided with a first circular disc 39, a protractor 34 and an isolation pipe sleeve 314 from front to back, the protractor 34 comprises a fourth rectangular plate 38, a first circular disc 39, a first sector ring 310, the fourth rectangular plate 38 is a transparent hard thin plate, two ends of the fourth rectangular plate 38 are provided with first fan-ring plates 310, the first sector ring plate 310 is a partial circular ring formed by a major arc, the surface of the first sector ring plate 310 is provided with a second scale 312 and a second nail hole 313 at the tail end, the second scale 312 is a radial angle line, the surface of the fourth rectangular plate 38 is provided with a first scale 311, the first round shaft rod 33 is provided with a protractor 34 in an up-and-down symmetrical manner, and the upper part rotates anticlockwise and the lower part rotates clockwise, the first ring plate 310 can be sleeved outside the first circular tube 32 and a pin can be inserted through the second pin hole 313 to form a circular ring protractor. The other end of the fourth rectangular plate 38 is provided with a second rectangular groove 36, a second slider 35 is arranged in the second rectangular groove 36, and a third rectangular groove 37 is arranged on the left side of the second rectangular groove 36.

The positioning rod 3 fixes the second slide block 35 to the first stay 25 of the drawing board 2.

As shown in fig. 1 and 5, the base circle constructor 4 includes a second circular tube 41, an inner inserting rocking tube 411, and a first pulley 412, where the second circular tube 41 is a circular shaft tube with smooth inner and outer surfaces, the middle rear portion of the second circular tube 41 is provided with the first pulley 412, the first pulley 412 includes a second circular disc 42, a third circular tube 43, and a third circular disc 44, the front end and the rear end of the third circular tube 43 are sequentially provided with the fixed second circular disc 42 and the fixed third circular disc 44, inner circular holes of the second circular disc 42 and the third circular disc 44 are identical, the first pulley 412 is formed by sleeving inner circular holes of the second circular disc 42 and the third circular disc 44 on the second circular tube 41 and fixing the same, the third circular tube 43 is provided with a rope pressing strip 45, and the front end of the second circular tube 41 is provided with a first pin 46. 41 circumference front end of second pipe is equipped with first opening 47, first opening 47 is the through-hole, be equipped with interpolation in the first opening 47 and shake pipe 411, interpolation is shaken pipe 411 and is included fourth pipe 48, first in command 49, cuboid voussoir 410, fourth pipe 48 is hard straight pipe, 48 right-hand members of fourth pipe are equipped with cuboid voussoir 410, cuboid voussoir 410 symmetry sets up, 48 left end circumferences of fourth pipe are equipped with first in command 49, interpolation is shaken pipe 411 and is inserted two first openings 47 respectively with two cuboid voussoirs 410.

The base circle constructor 4 is characterized in that the second round tube 41 is sleeved on the first round tube 32 of the positioning rod 3, the first pin 46 is loosened to swing the first handle 49, the base circle constructor 4 can freely rotate, and the first pin 46 is screwed to prevent the base circle constructor 4 from freely rotating.

As shown in fig. 1 and 6, the curved line lamp 5 includes a first soft rope 51, an optical fiber 52, a diode lamp 53, a fifth circular tube 54, a fourth circular ring 55, a fifth circular ring 56, a sixth circular tube 57, and a second pin 58, the first soft rope 51 is a non-elastic tensile narrow-band soft rope, the optical fiber 52 is arranged on the first soft rope 51, the optical fiber 52 is a linear light-emitting optical fiber, the diode lamp 53 is arranged at one end of the optical fiber 52, the optical fiber 52 and the diode lamp 53 are both fixed on the surface of the first soft rope 51, a second pin hole 59 is arranged at one end of the diode lamp 53, the fifth circular tube 54 is arranged at the other end of the first soft rope 51, a fifth circular ring 56 and a fourth circular ring 55 are arranged at both ends of the fifth circular tube 54, the fifth circular ring 56 and the fourth circular ring 55 are fixed together and are called as a second pulley, a second pin 58 is arranged on the surface of the fifth circular ring 56, the second pin 58 is a bolt rod, the front end of the second pin is provided with a knob, the rear end of the knob penetrates through the fourth circular ring disc 55, a sixth circular tube 57 is arranged in inner circular holes of the fifth circular ring disc 56 and the fourth circular ring disc 55, the circumferential surface of the rear end of the sixth circular tube 57 is provided with threads, the threads of the sixth circular tube 57 are sleeved with a second nut 510, the rear end of the inside of the sixth circular tube 57 is provided with a power supply interface 511, and the power supply interface 511 is connected with the diode lamp 53 through a conducting wire.

The curved lamp 5 is formed by inserting a sixth round tube 57 into the third rectangular groove 37 of the positioning rod 3, fixing the sixth round tube with a second nut 510, and winding the first flexible cord 51 around the fifth round tube 54 of the second pulley. Rotation of the second pin 58 secures the cord pulley.

As shown in fig. 1 and 7, the radial rotating rod 6 includes a fifth rectangular plate 61, a seventh circular tube 62, a second handle 63, a third slider 64, a sixth rectangular plate 65, a first pulley 67, and a seventh rectangular plate 68, the fifth rectangular plate 61 is a non-deformable straight transparent rigid plate, a fourth rectangular groove 66 is disposed in the middle of the fifth rectangular plate 61, the third slider 64 is disposed in the fourth rectangular groove 66, the sixth rectangular plate 65 perpendicular to the third slider 64 is disposed on the surface of the third slider 64, the sixth rectangular plate 65 is a thin rigid plate, the first pulley 67 is disposed on the edge of the left and right side surfaces of the sixth rectangular plate 65, and the seventh rectangular plate 68 is disposed on the top surface of the sixth rectangular plate 65. The right end of the lower bottom surface of the fifth rectangular plate 61 is provided with a second handle 63, and the left side surface of the fifth rectangular plate 61 is provided with a seventh circular tube 62.

The radial rotating rod 6 is used for sleeving the seventh circular tube 62 between the second circular ring disc 42 and the first pin 46 on the second circular tube 41 of the base circle constructor 4, and the second handle 63 faces forwards.

As shown in fig. 1 and 8, the wire generating rail plate 7 comprises an eighth rectangular plate 71, a ninth rectangular plate 72, a fourth slider 73, a tenth rectangular plate 74, a second screw 75 and a ball 77, the eighth rectangular plate 71 is a non-deformable transparent flat hard plate, a fifth rectangular groove 79 is arranged in the middle of the eighth rectangular plate 71, a fourth sliding block 73 is arranged in the fifth rectangular groove 79, a second round hole 78 is arranged on the fourth sliding block 73, a vertical second screw 75 is arranged at the right end of the eighth rectangular plate 71, a ball 77 is arranged at the rear end of the second screw 75, a second pulley 76 is sleeved at the front end of the second screw 75, a ninth rectangular plate 72 is arranged on the lower bottom surface of the eighth rectangular plate 71, the ninth rectangular plate 72 is a transparent thin hard plate strip, a tenth rectangular plate 74 is arranged at the left end of the front edge of the ninth rectangular plate 72, and a third pulley 710 is arranged at the right end of the bottom surface of the ninth rectangular plate 72.

The generation track plate 7 is formed by fixing a right-angle groove rod formed by an eighth rectangular plate 71, a ninth rectangular plate 72 and a tenth rectangular plate 74 in a right-angle groove formed by a third sliding block 64, a sixth rectangular plate 65 and a seventh rectangular plate 68 on the radial rotating rod 6.

As shown in fig. 1 and 9, the painting brush 8 includes a threaded pipe 81, a round pen holder 82, a pen head 83, a first spring 84, a sixth circular ring disk 85, a third nut 86, and a fourth nut 87, the outer circumferential surface of the threaded pipe 81 is provided with threads, and is provided with a second wiring hole 88, a third wiring hole 89, a fourth nut 87, and a third nut 86 from top to bottom respectively, the second wiring hole 88 and the third wiring hole 89 are symmetrically arranged, the lower bottom surface of the threaded pipe 81 is provided with the first spring 84, and the first spring 84 is a coil spring. The other end of the first spring 84 is fixedly connected with a sixth ring disc 85, the lower bottom surface of the sixth ring disc 85 is provided with a round pen rod 82, the round pen rod 82 can move up and down through the first spring 84, the other end of the round pen rod 82 is provided with a pen point 83,

in the painting brush 8, a threaded pipe 81 is inserted into a second round hole 78 of a fourth sliding block 73 on the line generating rail plate 7, and the front and the back of the fourth sliding block 73 are fixed by a fourth nut 87 and a third nut 86 in sequence.

As shown in fig. 1 and 10, the wire winding wheel disc 9 includes a seventh circular tube 91, a seventh circular disc 92, an eighth circular disc 93, a second circular shaft rod 94, a fifth slider 95, a third handle 96, and a second soft rope 98, a second pressing strip 97 is disposed in the middle of the seventh circular tube 91, the second soft rope 98 is disposed in the second pressing strip 97, the second soft rope 98 is a narrow-band soft rope with a smooth surface, no elasticity, and a uniform thickness, the seventh circular disc 92 and the eighth circular disc 93 are fixed at the front end and the rear end of the seventh circular tube 91 in sequence, the seventh circular disc 91, the seventh circular disc 92, and the eighth circular disc 93 are collectively referred to as a third pulley, the third handle 96 is disposed on the surface of the seventh circular disc 92, the seventh circular tube 91 is disposed in the central hole of the third pulley, and the fifth rectangular slider 95 is disposed at the rear end of the seventh circular tube 91.

The wire winding wheel disc 9 is fixed by placing the fifth sliding block 95 in the third rectangular groove 37 of the positioning rod 3, and the second soft rope 98 can be wound on the third belt wheel by swinging the second handle 96.

As shown in fig. 1 and 11, the belt buckle connecting cable 10 includes an eleventh rectangular plate 101, a first inner inserting pull rod 102, a second inner inserting pull rod 103, and a third flexible cord 104, where the eleventh rectangular plate is a thin and hard plate, a fourth wiring hole 108 is formed in the middle of the eleventh rectangular plate 101, a third flexible cord 109 is arranged in the fourth wiring hole 108, and the third flexible cord 109 is an inelastic stretch-resistant flexible cord. A first inner inserting pull rod 102 and a second inner inserting pull rod 103 are respectively arranged at two ends of the eleventh rectangular plate 101, the first inner inserting pull rod 102 comprises a twelfth rectangular plate 104, a square tube barrel 105, a second spring 106 and a ninth circular disc 107, the ninth circular disc 107 is a hard thin circular disc, a square tube barrel 105 is arranged on the outer circumference of the ninth circular disc 107, the square tube barrel 105 is a bottomed quadrangular barrel, the ninth circular disc 107 is fixed outside the lower bottom surface of the square tube barrel 105, the second spring 106 is arranged on the inner bottom surface of the square tube barrel 105, a twelfth rectangular plate 104 is arranged at the upper end of the second spring 106, part of the twelfth rectangular plate 104 is inserted into the square tube barrel 105, the upper end of the twelfth rectangular plate 104 is vertically fixed on the eleventh rectangular plate 101, and the second inner inserting pull rod 103 is the same as the first inner inserting pull rod 102.

The belt buckle 10 is formed by sleeving the ninth circular ring discs 107 on the first inner inserting pull rod 102 and the second inner inserting pull rod 103 on the second circular tube 41 of the base circle constructor 4, wherein the first inner inserting pull rod 102 is arranged in front of the first belt pulley 412, and the second inner inserting pull rod 103 is arranged behind the first belt pulley 412.

The utility model discloses a become basic circle follow-up formula demonstration and image drawing appearance's theory of operation is, and the circular arc curve according to the constant curvature expandes the straight line for zero curvature, expandes the straight line on expanding into the tangent line with the point on the winding follow-up principle will be the circular arc according to the tangent line of adjacent circular arc. The method is characterized in that: the operation is simple, and the construction, the motion demonstration and the image drawing of the base circle can be completed only by pushing and rotating the handle under the initial condition; the functions are complete: the construction of different base circles can be completed, the arc can be unfolded into a straight line along a tangent line to form a generating line, and the involute trajectory can be synchronously drawn into an involute; the demonstration process is real and intuitive; the structure is compact, the cost is low, and the carrying is convenient; the applicability is strong: the demonstration and the image drawing can be carried out at any visual angle in various occasions. The method is suitable for teaching, engineering design, machining and the like.

The utility model discloses a become base circle follow-up formula demonstration and image drawing appearance of gradually bursting at seams has the function of the arbitrary radial disc of quick structure and circular arc, and operating procedure is:

firstly, assembling instruments, 1] placing a terrace base 16 of the chassis 1 on a stable horizontal plane, and screwing a first nut 15 to enable the chassis 1 to be in a stable state. 2] inserting the dovetail wedge strip 22 of the projection vertical plate 2 into the dovetail groove 13 of the chassis 1. And 3, placing the positioning rod 3 on the drawing board 2, and switching on a power line of the cylindrical spotlight 316 to turn off the spotlight. 4, sequentially detaching the inner inserting rocking tube 411 and the first pin 46 on the base circle constructor 4, sleeving the connecting rope with the clamp 10 on the second circular tube 41, placing the base circle constructor 4 provided with the connecting rope with the clamp 10 on the positioning rod 3, and sleeving the two protractors 34 on the positioning rod 3 in front of the connecting rope with the clamp 10 on the second circular tube 41. 5, the radial rotating rod 6 is sleeved on the second round tube 41 in front of the protractor 34, and the second handle 63 is rotated to fix the radial rotating rod 6 at the arc baffle 27. 6] the inner swing tube 411 and the first pin 46 are replaced on the base circle builder 4, and the base circle builder 4 is fixed to the second circular tube 41 by the first pin 46. 7] the curve lamp 5 is placed on the positioning rod 3, the power cord is connected and closed, the second pin 58 is loosened, the first cord 51 and the optical fiber 52 are wound on the second pulley, and then the cord is fixed by the second pin 58. 8, the winding wheel disc 9 wound with the second soft rope 98 is fixed on the positioning rod 3, and the outer end of the second soft rope 98 is fixed on the base circle constructor 4 by the first pressing strip 45. 9] the generation track plate 7 is placed on the radial rotating rod 6. 10] brush 8 is placed on generation rail plate 7. 11] the sheet with the coordinate system and the circle drawn thereon is placed on the palette 2 and fixed by the cardboard setter 26. 12] the connecting rope with the card 10 is rotated to the radial rotating rod 6, and the outer end of the third flexible rope 109 sequentially passes through the right first pulley 67, the right third pulley 710 and the right second pulley 76 and is fixed on the painting brush 8.

Setting symbols: 1]The coordinate system on the drawing board 2 paper is set as Oxy, and the center of the drawn circle is marked as the point O

O is the base circle of the involute, and the radius is r. 2]The coordinate system of the base circle constructor 4 is set as O1ty1, the circle center of the constructed disc is O1, the circle center is on the center line of the first circular tube 32 on the positioning rod 3, the center of the protractor 34, the zero point of the first scale 311 and the cylindrical spot lamp 316 are all on the center line of the first circular tube 32, and the projection point of the point O1 on the drawing board 2 is O. The 0 ° line on the protractor 34 is a rotation angle initial edge, i.e., an axis O1t, and a projection straight line on the drawing board 2 coincides with the positive direction of the axis Ox.

Thirdly, adjusting the initial position: 1, turning on a cylindrical spotlight 316 to adjust a positioning rod 3 to enable a light column to be fixed after being projected on a base circle center point O, and turning off the cylindrical spotlight 316; 2, fixing an eleventh rectangular plate 101 with a clamping connecting rope 10 on a sixth rectangular plate 65 in the radial rotating rod 6, moving a third slide block 64, and fixing the eleventh rectangular plate 101 and a generation line track plate 7 on the third slide block after the distance from the axis of the base circle constructor 4 to the axis of the base circle constructor is larger than r; 3] rotating the third nut 86 and the fourth nut 87 of the painting brush 8 respectively to separate the pen head 83 from the surface of the drawing board 2

Fourthly, constructing a dynamic disc and an arc: 1] the first pin 46 is opened, the first handle 49 is shaken to tightly wind the second soft rope 98 on the reel disc 9 on the base circle constructor 4, the second soft rope 98 forms a disc O1t with a radius R increasing on the base circle constructor 4, the shaking is stopped when the R is equal to R on the first scale 311, and the first pin 46 is rotated to fix the base circle constructor 4. And 2, loosening the eleventh rectangular plate 101, and rotating the first inner inserting pull rod 102 and the second inner inserting pull rod 103 on the connecting rope with the clamp 10 to a position with an arc value theta 1 at the upper corner of the second scale 312 for fixing. Fixing the outermost layer of the disk O1t composed of the second cord 98 at the angle theta 1 to obtain a disk O1t with the radius r; 3] the second pin 58 is loosened, the first cord 51 and the optical fiber 52 are wound on the disk O1t counterclockwise, the second pin 58 is tightened to fix the second pulley of the curved lamp 5, and the cord is passed through the first wiring hole 59 of the outer end of the first cord 51 and fixed on the eleventh rectangular plate 101. When the power switch of the curve lamp 5 is turned on, the diode lamp 53 and the optical fiber 52 are lighted to form an arc with a radius r.

Fifthly, finishing the demonstration: and returning the demonstration instrument to the initial state.

The utility model discloses a become base circle follow-up formula demonstration and image drawing appearance of gradually bursting at seams has the function of the involute formation process of demonstration circle and change essence, and the operating procedure is:

firstly, assembling an instrument: as in the rapid construction of discs and arcs of any radius.

Setting symbols: as in the rapid construction of discs and arcs of any radius.

Thirdly, adjusting the initial position: as in the rapid construction of discs and arcs of any radius.

Fourthly, constructing a dynamic disc and an arc: as in the rapid construction of discs and arcs of any radius.

Fifthly, demonstrating the forming process and the changing essence of the involute of the circle: 1] the outer end of the first cord 51 is detached from the eleventh rectangular plate 101. 2] the second handle 63 is pushed to rotate the radial rotating rod 6 to the angle theta 1, and the third slide block 64 is moved to make the generation line rail plate 7 close to the eleventh rectangular plate 101 and then fixed. 3, moving the third slide block 64 to enable the generation line rail plate 7 to be fixed after being close to the eleventh rectangular plate 101; 3] the outer end of the third flexible cord 109 is released and the fourth slider 73 is moved to position the round shaft 82 of the brush 8 at the eleventh rectangular plate 101. And 4, fixing the outer end of the first soft rope 51 on the round pen holder 82, and tightening the outer end of the third soft rope 109 to be fixed on the round pen holder 82. 5] the second handle 63 is pushed and rotated to enable the radial rotating rod 6 to rotate anticlockwise, the eleventh rectangular plate 101 is not moved, the third soft rope 109 is pulled by the sixth rectangular plate 65 on the radial rotating rod 6 and is gradually wound on the disc O1t, the first soft rope 51 is synchronously pulled by the third soft rope 109 and is unfolded into a straight line along the generation line rail plate 7, and the optical fiber 52 has an arc light beam to form a straight light beam. The bright spot of the diode lamp 53 does a circular motion as well as a linear motion, and the motion track is an involute curve. 6] when the radial rotating rod 6 reaches the position theta 2 after rotating a certain angle, the second handle 63 stops being pushed and rotated.

Sixthly, finishing the demonstration: and returning the demonstration instrument to the initial state.

The utility model discloses a become base circle follow-up formula demonstration and image drawing appearance of gradually bursting at seams has the automatic function of drawing circle arbitrary point department gradually burst at seams, and the operating procedure is:

firstly, assembling an instrument: the method is the same as the method for demonstrating the forming process and the changing essence of the involute of the circle.

Setting symbols: the method is the same as the method for demonstrating the forming process and the changing essence of the involute of the circle.

Thirdly, adjusting the initial position: the method is the same as the method for demonstrating the forming process and the changing essence of the involute of the circle.

Fourthly, constructing a dynamic disc and an arc: the method is the same as the method for demonstrating the forming process and the changing essence of the involute of the circle.

Drawing an involute at any point on the circle: 1] the outer end of the first cord 51 is detached from the eleventh rectangular plate 101. 2] the second handle 63 is pushed to rotate the radial rotating rod 6 to the angle theta 1, and the third slide block 64 is moved to make the generation line rail plate 7 close to the eleventh rectangular plate 101 and then fixed. 3] the outer end of the third flexible cord 109 is released and the fourth slider 73 is moved to position the round shaft 82 of the brush 8 at the eleventh rectangular plate 101. And 4] rotating third nut 86 and fourth nut 87 of brush 8 to bring nib 83 into contact with the base circle on the sheet of palette 2. 5, fixing the outer end of the first soft rope 51 on the round penholder 82, and tightening the outer end of the third soft rope 109 on the round penholder 82. 6] the second handle 63 is pushed and rotated to enable the radial rotating rod 6 to rotate anticlockwise, the eleventh rectangular plate 101 is not moved, the third soft rope 109 is pulled by the sixth rectangular plate 65 on the radial rotating rod 6 and is gradually wound on the disc O1t, the first soft rope 51 is synchronously pulled by the third soft rope 109 and is unfolded into a straight line along the generation line rail plate 7, and the optical fiber 52 has an arc light beam to form a straight light beam. The bright point of the diode lamp 53 does a linear motion or a circular motion, the motion track is an involute curve, and the pen head 83 draws a track curve on the drawing board 2 paper. 7] when the radial rotating rod 6 reaches the position theta 2 after rotating a certain angle, the second handle 63 stops being pushed and rotated.

Sixthly, finishing the demonstration: and taking down the paper, and returning the demonstration instrument to the initial state.

The utility model discloses become base circle follow-up involute demonstration and image drawing instrument's economic value and application prospect: with the technical progress and economic development, advanced equipment is required to improve the teaching effect and the product quality, a variable base circle follow-up involute demonstration and image drawing instrument which is simple to operate and convenient to use is urgently needed, only thousands of schools are shared in the high education nation, and numerous engineering designs and gear manufacturing enterprises are needed, so that the quantity is considerable, the market prospect is very wide, and good economic benefit and social benefit are achieved.

The utility model discloses the part that does not relate to all is the same with prior art or can adopt prior art to realize.

As mentioned above, although the present invention has been shown and described with reference to certain preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. Become basic circle follow-up involute demonstration and image drawing appearance, its characterized in that: including chassis, drawing board, locating lever, base circle constructor, curve lamp, radial bull stick, emergence line rail board, painting brush, wire winding rim plate, take the card even cable, on the chassis was arranged in to the drawing board, on the drawing board was arranged in to the locating lever, on the locating lever was all arranged in to base circle constructor, radial bull stick and wire winding rim plate, curve lamp was arranged in on the base circle constructor, take place on the line rail board arranges radial bull stick in, on the line rail board takes place in to the painting brush, take the card even cable and be even an organic whole with painting brush and base circle constructor.

2. The variable base circle follow-up involute demonstration and image drawing instrument of claim 1, wherein: the positioning rod comprises a third rectangular plate, a first round pipe, a first round shaft rod, a protractor, a second sliding block and a first circular ring disc, the left end of the third rectangular plate is provided with a first round hole, the first round hole is internally provided with the first round pipe, the first round pipe is internally provided with a cylindrical spotlight, the middle part of the third rectangular plate is provided with the first round shaft rod, the first circular ring disc, the protractor and an isolation pipe sleeve are sequentially arranged on the first round shaft rod from front to back, the protractor comprises a fourth rectangular plate, the first circular ring disc and a first fan ring, the two ends of the fourth rectangular plate are provided with first fan ring plates, the first fan ring plates are partial circular rings formed by major arcs, the surface of the first fan ring plate is provided with a second scale and a tail end second nail hole, the second scale is a radial angle line, the surface of the fourth rectangular plate is provided with the first scale, the first round shaft rod is symmetrically provided with the protractor up and down, the first fan ring plate can be sleeved outside the first circular pipe, the other end of the fourth rectangular plate is provided with a second rectangular groove, a second sliding block is arranged in the second rectangular groove, and a third rectangular groove is arranged on the left side of the second rectangular groove.

3. The variable base circle follow-up involute demonstration and image drawing instrument of claim 2, wherein: the third rectangular plate is a stiff straight strip.

4. The variable base circle follow-up involute demonstration and image drawing instrument of claim 2, wherein: the fourth rectangular plate is a transparent hard thin plate.

Images