CN2181050Y

CN2181050Y - Tolerance and fit demonstration device

Info

Publication number: CN2181050Y
Application number: CN 93209514
Authority: CN
Inventors: 赵永柱; 谢怀真; 贺永年
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-08
Filing date: 1993-04-08
Publication date: 1994-10-26
Anticipated expiration: 2003-04-08

Abstract

The utility model relates to a tolerance and fit demonstrating device. The utility model is composed of a fit demonstrating section and a tolerance zone diagram section. An electric bulb installed on a light source moving rod can move along the axial direction in a shifting fork. The shifting fork and shaft zone sheets are connected together. Hole zone sheets and fixing sheets are respectively inserted into the front and the back parts of a demonstrating cylinder. The light rays pass through the shaft zone sheets and the hole zone sheets, and are projected to a projection surface installed on a frame. A zone and diagram demonstrating frame is fixed on a zone and diagram fixing frame, and zone needles are installed on the zone and diagram demonstrating frame. The utility model is mainly used for the course teaching 'Tolerance and Fit', and visually reveals the knowledge relationship of all basic concepts and the knowledge relationship of the tolerance zone diagram and the basic concepts of the 'Tolerance and Fit'.

Description

Tolerance and fit demonstration device

A kind of Common Difference ﹠ Cooperation demonstrator belongs to the teaching demonstration apparatus.

In the instruction practice of Common Difference ﹠ Cooperation knowledge, owing to still there is not audiovisual aids, bring inconvenience for teaching of knowledge, be difficult to vividly describe the key concept of tolerance; If utilization is made the Common Difference ﹠ Cooperation synoptic diagram at blackboard and explained, because the limit deviation value changes with the basic deviation code name, mapping has increased teacher workload one by one, and the classroom is consuming time many; With the hole of matching, axle is that audiovisual aids is told about, because size is definite, (physical size is only arranged), can't demonstrate given margin tolerance, be difficult to tell about the key concept of tolerance clear, and drawing of tolerance range is abstract hard to understand, can not be easily and effectively with of different nature cooperate to set up contact directly.

The purpose of this utility model has just provided a kind of image, discloses hole, axle tolerance fit key concept intuitively, shows the ultimate principle of tolerance, embodies the Common Difference ﹠ Cooperation demonstrator of the corresponding relation between cooperation and the drawing of tolerance range.

The purpose of this utility model is to realize like this.

The utility model is by cooperating demonstration part and drawing of tolerance range partly to form, bulb is installed on the light source carriage release lever, the light source carriage release lever is enclosed within the shift fork, shift fork links together with the axle strap, the front and back of demonstration tube are bumped into pore area sheet and stator respectively, band figure demo rack is fixed on the band figure fixed mount, the band pin is installed on the band figure demo rack, the demonstration tube is fixed on the frame, the axle strap, shift fork, slide is installed in the demonstration tube successively, the casing front end is fixed on the projecting plane, and the axle strap is fixed in shift fork front end, display aperture, four band pins of axle limit deviation process by magnet.

Fig. 1 is a cut-open view of the present utility model.

Fig. 2 is a left view of the present utility model.

Wherein: the 1-projecting plane; 2-adjusts screw; The 3-casing; 4-pore area sheet; 5-axle strap; The 6-shift fork; 7-demonstrates tube; The 8-slide; 9-light source carriage release lever; The 10-stator; The 11-bulb; The 12-transformer; The 13-frame; 14-is with nail; 15-band figure demo rack; 16-band figure fixed mount; 17-awl end holding screw.

Below in conjunction with drawings and Examples the utility model is further described.

Cooperate the demonstration part to adopt the center Imaging Principle, as shown in Figure 1, bulb 11 is installed in the front end of light source carriage release lever, light source carriage release lever 9 is fixed in the shift fork 6 by slide 8 and stator 10, can move axially in shift fork 6, after the energized, the light that is sent by bulb 11 sees through pore area sheet 4 and axle strap 5, on projecting plane 1, obtain central projection, thereby reflection is portalled, the dimensional tolerance range of axle; Because bulb 11 and axle strap 5 all can move axially, and carry out the appropriate location and regulate, and be reference with groove arc on the projecting plane 1, thereby obtain required enlarging projection on projecting plane 1.As shown in Figure 2, display aperture, four of limit deviation bands of axle pins 14 process by magnet, during demonstration its suction are put on the band figure demo rack 15 that iron sheet does, and all there is scale on the both sides of band figure demo rack 15, like this, the tolerance range size, the position is arbitrarily adjustable, make it to coordinate mutually with cooperating demonstration graph.When power connection, the 220V voltage that transformer 12 provides AC power becomes the electric energy of bulb 11 required 12V, 12W; Light shines on it by pore area sheet 4, axle strap 5, the ABC that shows Common Difference ﹠ Cooperation is adjusted slight clearance between the screw 2 by the projecting plane, can mix up 1 position, projecting plane up and down, fixing then, to guarantee 1 scale center, projecting plane and hole, axial projection's centres.Processing (tolerance) scope of light by pore area sheet 4 display aperture on projecting plane 1, and can move forward and backward by bulb 11 and change range size; Light shows axle processing (tolerance) scope by axle strap 5 on projecting plane 1, and can move forward and backward by bulb, shift fork 6 moves forward and backward and changes range size, slight clearance between the hole of stationary shaft strap 5 and the adjustment screw 2, can make a strap 5 do up and down trace adjustment according to this, make hole, axial projection concentric.Two couple who is magneted on the band figure demo rack 15 by adjustment is with pin 14 display aperture, axle drawing of tolerance range respectively, and embodies corresponding relation between cooperation and the drawing of tolerance range.

During use, open bonnet of the present utility model, take out parts such as band figure demo rack 15, band pin 14, adjustment screw 2, pull out band figure fixed mount 16, band figure demo rack 15 usefulness awl end trip bolt 17 is fixed on it from the positive lower right corner of the utility model.Adopt not homochromy metal marker on projecting plane 1, to assist in case of necessity and determine limit deviation with a stroke position device.On projecting plane 1, strict guarantee three-core normalizing is answered at hole, axial projection center and scale center, projecting plane.

The utility model image, disclosed the key concept of hole, axle tolerance intuitively, vivo demonstrated the diagram principle of tolerance, the correct ABC that cooperates that discloses, embody cooperate and drawing of tolerance range between corresponding relation.

Claims

1, a kind of Common Difference ﹠ Cooperation demonstrator, partly form by cooperating demonstration part and drawing of tolerance range, it is characterized in that: bulb is installed on the light source carriage release lever, the light source carriage release lever is enclosed within the shift fork, shift fork links together with the axle strap, the front and back of demonstration tube are bumped into pore area sheet and stator respectively, and band figure demo rack is fixed on the band figure fixed mount, and the band pin is installed on the band figure demo rack.

2, according to the Common Difference ﹠ Cooperation demonstrator described in the claim 1, it is characterized in that: the demonstration tube is fixed on the frame, and axle strap, shift fork, slide are installed in the demonstration tube successively.

3, according to the Common Difference ﹠ Cooperation demonstrator described in the claim 1, it is characterized in that: the casing front end is fixed on the projecting plane, and the axle strap is fixed in the shift fork front end.

4, according to the Common Difference ﹠ Cooperation demonstrator described in the claim 1, it is characterized in that: four band pins of display aperture, the axle limit process by magnet.