CN2181051Y - Demonstration device for text of mechanical drawing - Google Patents

Abstract

The utility model relates to a demonstration device for text of Mechanical Drawing for teaching, which is formed by plastic injection or moulding and is capable of making geometric models. The integration of the demonstration device is cuboid structure, which is divided into an upper casing and a lower casing; the conjoined midline of the upper and the lower casings from one end to the other end is alternately provided with 11 hole models of cuboid, cube, drum, hexagonal nut, tri-prism volume, cylinder, hemisphere, sphere, four-edges pyramid, three-edges pyramid, cone, etc. in sequence. The required geometric models can be obtained only by filling plaster into corresponding cavities or the combinations thereof and separating the upper and the lower casings.

Description

Demonstration device for text of mechanical drawing

The utility model relate to a kind of be raw material with plastics with injection or be cast into that the mould mode makes manufacture " mechanical drawing " course prototype instrument of multiple geometric model for the teaching use.

Used teaching mode roughly is divided into two classes in China Higher universities and colleges and secondary technical school's " mechanical drawing " course at present, the one, (generally each model space volume is about 30 * 30 * 30cm) wooden mold that volume is bigger, wherein some model can be dismantled; Another kind of is the fixed model of the made smaller size smaller of rigid plastic, generally can not break, and belongs to assembly comparatively complicated in the common three-view diagram usually.Though this two class model has certain help to student's space imagining ability, in the face of the combination of Protean various geometrical bodies, use and but feel inconvenience deeply, in addition powerless, and figure selecting is dumb, more can not be with need with getting.So existing teaching mode makes many faculties feel unable to do what one wishes,, begin to learn pictorial diagram, three-view diagram, sectional view etc. and more feel inconvenience especially to begining to learn the student of " mechanical drawing " course.

Goal of the invention of the present utility model is to overcome the existing shortcoming of using in existing " mechanical drawing " teaching of model, seek to provide a kind of flexible and changeable model instrument, this model instrument can arbitrary combination, cut etc. on assembly unit and limit, by the time multiple section and multiple composite entity, thus space imagination and spatial thinking ability difference can be solved and the problems such as deficiency brought.

In order to realize the foregoing invention purpose; the technical solution of the utility model is that to select rigid plastic such as Polyvinylchloride or polystyrene for use be starting material; adopt conventional mechanical injection-molded or be cast into the mould mode and be processed into cuboid hole model instrument housing, these void shapes are followed successively by 11 kinds of rectangular parallelepiped, square, cylinder, hexagonal nut body, tri-prismoid, right cylinder, hemisphere, spheroid, rectangular pyramid body, triangular cone, cones etc.When manufacturing, both but shot moulding or cast molding were whole, be divided into two along midline incision then, can divide secondary to inject respectively again or cast molding is a upper and lower casing, it merges totally is rectangular parallelepiped, and height and width equate that the height in the above-mentioned 11 kinds of holes that are arranged in order along the rectangle side is high or wide less than this model instrument, i.e. opening, and another side opening not.During use,,, fill up a certain hole with clay then, unclamp rope or clip again and can obtain a required model with rope or clip fix tightly with the last lower house alignment of this model instrument; If desired model is an assembly, unclamp rope or clip as long as choose again after the cave alignment is filled up clay with rope or clip fix tightly in midair accordingly, separately go up lower house, can obtain corresponding model group zoarium; The face of tool of a certain model needs only the maquette that obtains is opened by means of Tool in Cutting if desired.

The utility model is compared with existing " mechanical drawing " teaching mould to have simple in structurely, uses flexible and changeablely, and volume is little, and is in light weight, easy to carry, the outstanding advantage of grade durable in use.

Fig. 1 is the front elevational schematic of the utility model,

Fig. 2 is the schematic top plan view of the utility model.

The utility model is manufactured and selected rigid plastic such as Polyvinylchloride or polystyrene for use when implementing is raw material; also can select metal material for use; adopt common process equipment through injection-molded or be cast into the mould mode and be processed into; integral body is rectangular parallelepiped; comprise upper shell 1 and lower house 2 two parts; upper shell 1 is identical with the physical dimension of lower house 2; be: long 35cm; high 6cm; wide 6cm is shaped on hole model rectangular parallelepiped 3 successively along the center line of upper shell 1 and lower house 2 alignment; square 4; cylinder 5; hexagonal nut body 6; tri-prismoid 7; right cylinder 8; hemisphere 9; spheroid 10; rectangular pyramid body 11; 11 kinds of triangular cone 12 and cones 13 etc.Upper shell 1 and lower house 2 both can shot moulding or cast molding be whole, the Yanzhong line cuts and is divided into two then, can divide secondary to inject respectively or the cast molding upper and lower casing again, the height that is arranged in order the above-mentioned 11 kinds of hole models that make along the rectangle side is high or wide less than this model instrument integral body all, promptly one side is an opening, and another side opening not, so that use and manufacture.Hole on upper shell 1 and the lower house 2 is asymmetric, be that 9 of hexagonal nut body 6 and hemispheres are manufactured on lower house 2, tri-prismoid 7 and the part of triangular cone 12 on upper shell 1 are the sub-fraction in its whole hole, are convenient to be combined into multiple geometric model like this.Distance should be greater than 05cm between the limit of each hole model, and guaranteeing its integrally-built soundness, the maximal side of each hole model should be less than 4cm, is contained in fully among the integral body to guarantee it.During use, with upper shell 1 and lower house 2 alignment, with rope or clip fix tightly, fill up a certain hole with clay then, just unclamp rope again or clip can make required model, as producing the right cylinder model, as long as with 8 alignment of the right cylinder hole on the upper and lower casing, in the hole, fill up clay, separate upper and lower casing then, can make the right cylinder maquette; If the model of producing is an assembly, as long as choose the alignment of cave in midair on the upper and lower casing, in the assembly hole that forms, fill up clay then, separate upper and lower casing again, just can obtain desired assembly model, be rectangular parallelepiped as producing half, second half is cylindrical built-up pattern, as long as with the right cylinder hole 8 on the 3 alignment upper shells 1 of the rectangular parallelepiped hole on the lower house 2, fill up this combination hole with clay then, separately upper and lower casing can obtain the model of rectangular parallelepiped and double combination of right cylinder.If obtain a certain face of tool of a certain model or built-up pattern,, relend and help Tool in Cutting and open and get final product as long as make model as stated above earlier.Filling material of the present utility model is a clay, can repeatedly use, and be convenient to flexible and changeable, also can be in the place of condition difference with materials such as earth, more economically.

Claims (2)

1, a kind of is that " mechanical drawing " course prototype instrument that is molded as is injected or be cast into to raw material through conventional technology with plastics, it is characterized in that cuboid hole model instrument is made up of upper shell and lower house two parts, last lower house alignment center line along its rectangle side is shaped on 11 kinds of hole models such as rectangular parallelepiped, square, cylinder, hexagonal nut body, tri-prismoid, right cylinder, hemisphere, spheroid, rectangular pyramid body, triangular cone and cone successively, its opening, another side is opening not; The physical dimension correspondence of upper and lower casing is identical, and overall dimensions is long 35cm, high 6cm, wide 6cm.

2, " mechanical drawing " according to claim 1 course prototype instrument is characterized in that upper and lower casing does not line up combination and can obtain new combinatorial geometry hole model; The material that filling hole uses can make corresponding face of tool as clay or earth, the model of making by means of cutter.

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