CN210895898U

CN210895898U - Demonstration teaching aid for mechanical drawing teaching

Info

Publication number: CN210895898U
Application number: CN201922132743.5U
Authority: CN
Inventors: 王春青
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-06-30
Anticipated expiration: 2029-12-03

Abstract

The utility model relates to a demonstration teaching aid technical field, especially be a demonstration teaching aid for mechanical drawing teaching, the on-line screen storage device comprises a base, base top end face left end fixedly connected with projection board, the projection board right-hand member is equipped with puts the thing board, it is connected with the base rotation to put the thing board, and puts the thing board and run through the base, it is connected with the clutch blocks to put thing board bottom end face fixedly, clutch blocks bottom end face fixedly connected with first gear, first gear bottom end face fixedly connected with layer board; the utility model discloses in, through the first gear that sets up, the layer board, first slider, spring, fixed block and second gear, this kind of fixed connection that sets up the first gear of cooperation and layer board, the layer board is connected with the rotation of first slider, the fixed connection of first slider and fixed block, the fixed connection of fixed block and spring and the meshing of second gear and first gear are connected, realized according to the teaching needs, change the projection angle of projection object under the condition that does not change the axle center position of projection object.

Description

Demonstration teaching aid for mechanical drawing teaching

Technical Field

The utility model relates to a demonstration teaching aid technical field specifically is a mechanical drawing teaching is with demonstration teaching aid.

Background

In the teaching of "mechanical drawing" course, often need express the three-dimensional physique on paper with two-dimensional plane figure, usually lean on the projection method to realize this purpose, the teacher often adopts the projection figure on the single picture to express the projection method, many students are in the process of training space thinking ability, the process and the principle of projection are difficult to understand, among the prior art, there are some teaching aids that express the projection method, but it has the defect in the use, consequently, the demand to a demonstration teaching aid for mechanical drawing teaching is growing day by day.

Present mechanical drawing teaching is with demonstration teaching aid can not be as required according to the teaching, change the projection angle of projection object under the condition of the axle center position that does not change the projection object, furthermore, present mechanical drawing teaching is with demonstration teaching aid when changing the distance between light source and the projection object, the teaching aid location is incorrect, it is inaccurate to result in the projection view table to reach, the student of misleading easily, and present mechanical drawing teaching is with demonstration teaching aid can not change the height of light source as required, can not fully satisfy the teaching demand, therefore, to the above-mentioned problem provide a mechanical drawing teaching is with demonstration teaching aid.

Disclosure of Invention

An object of the utility model is to provide a mechanical drawing teaching is with demonstration teaching aid to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a demonstration teaching aid is used in mechanical drawing teaching, the on-line screen storage device comprises a base, base top face left end fixedly connected with projection board, the projection board right-hand member is equipped with puts the thing board, it rotates with the base to put the thing board and is connected, and puts the thing board and run through the base, put thing board bottom end fixedly connected with clutch blocks, the first gear of clutch blocks bottom end fixedly connected with, first gear bottom end face fixedly connected with layer board, layer board bottom end face central point puts and rotates and is connected with first slider, the inboard sliding connection of first slider has the fixed block, fixed block and base fixed connection, base top end face right-hand member sliding connection has the second slider, the inboard top sliding connection of second slider has the third slider, third slider top face fixedly connected with projection lamp.

Preferably, the top end face of the fixed block is fixedly connected with a spring, and the other end of the spring is fixedly connected with the first sliding block.

Preferably, the right end face of the first gear is connected with a second gear in a meshed mode, the second gear is connected with the supporting plate in a sliding mode, the top end face of the second gear is fixedly connected with a fixed rod, the fixed rod penetrates through the base, and the fixed rod is connected with the base in a rotating mode.

Preferably, the bottom end of the right end face of the second sliding block is spirally connected with a first threaded shaft, the first threaded shaft penetrates through the second sliding block, the first threaded shaft penetrates through the base, and the first threaded shaft is rotatably connected with the base.

Preferably, the inner side of the third sliding block is spirally connected with a second threaded shaft, the second threaded shaft penetrates through the third sliding block, the bottom end face of the second threaded shaft is fixedly connected with a worm wheel, the worm wheel is rotatably connected with the second sliding block through a rotating shaft, the front end face of the worm wheel is meshed with a worm, the worm penetrates through the second sliding block, and the worm is rotatably connected with the second sliding block.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, through the arrangement of the first gear, the supporting plate, the first slider, the spring, the fixed block and the second gear, the arrangement is matched with the fixed connection of the first gear and the supporting plate, the rotating connection of the supporting plate and the first slider, the fixed connection of the first slider and the fixed block, the fixed connection of the fixed block and the spring and the meshing connection of the second gear and the first gear, the projection angle of the projection object can be changed without changing the axle center position of the projection object according to the teaching requirement;

2. the utility model discloses in, through the first threaded spindle that sets up, third slider, second threaded spindle, worm wheel and worm, this kind sets up the fixed connection of cooperation third slider and second threaded spindle screwed connection, second threaded spindle and worm wheel and the meshing of worm wheel and worm is connected, realized when changing the distance between light source and the projection object, correctly fix a position the teaching aid, make the projection view table reach the accuracy, and the teaching aid can change the height of light source as required, the fully provided teaching demand.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural diagram of a portion a of fig. 1 according to the present invention.

In the figure: the projection lamp comprises a base 1, a projection plate 2, a storage plate 3, a friction block 4, a first gear 5, a supporting plate 6, a first sliding block 7, a spring 8, a fixed block 9, a second gear 10, a fixed rod 11, a second sliding block 12, a first threaded shaft 13, a third sliding block 14, a second threaded shaft 15, a worm wheel 16, a worm 17 and a projection lamp 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

a demonstration teaching aid for mechanical drawing teaching comprises a base 1, wherein a projection plate 2 is fixedly connected to the left end of the top end face of the base 1, the projection plate 2 is convenient to display a projection, an object placing plate 3 is arranged at the right end of the projection plate 2, the object placing plate 3 is rotatably connected with the base 1, the object placing plate 3 penetrates through the base 1, a friction block 4 is fixedly connected to the bottom end face of the object placing plate 3, the arrangement is convenient to enable the angle of the object placing plate 3 not to change when the angle does not need to be changed, a first gear 5 is fixedly connected to the bottom end face of the friction block 4, a supporting plate 6 is fixedly connected to the bottom end face of the first gear 5, a first sliding block 7 is rotatably connected to the central position of the bottom end face of the supporting plate 6, a fixed block 9 is slidably connected to the inner side of the first sliding block 7, the fixed block 9 is fixedly, the top end of the inner side of the second slide block 12 is connected with a third slide block 14 in a sliding manner, and the top end surface of the third slide block 14 is fixedly connected with a projection lamp 18.

The top end face of the fixed block 9 is fixedly connected with a spring 8, the other end of the spring 8 is fixedly connected with a first sliding block 7, the arrangement is convenient for the friction block 4 to be closely attached to the base 1, so that the object placing plate 3 cannot rotate randomly, the right end face of the first gear 5 is engaged and connected with a second gear 10, the second gear 10 is connected with the supporting plate 6 in a sliding manner, the top end face of the second gear 10 is fixedly connected with a fixed rod 11, the fixed rod 11 penetrates through the base 1, the fixed rod 11 is rotatably connected with the base 1, the arrangement is convenient for the first gear 5 and the friction block 4 to move downwards by pressing the fixed rod 11, so that the projection angle can be changed by rotating the fixed rod 11, the bottom end face of the right end face of the second sliding block 12 is rotatably connected with a first threaded shaft 13, the first threaded shaft 13 penetrates through the second sliding block 12, and the first threaded shaft, and first threaded shaft 13 rotates with base 1 and is connected, and this kind of setting is convenient for pinpoint the distance between projection lamp 18 and the projection object, makes the projection picture express accurately, the inboard screwed connection of third slider 14 has second threaded shaft 15, second threaded shaft 15 runs through third slider 14, second threaded shaft 15 bottom end face fixedly connected with worm wheel 16, worm wheel 16 rotates through pivot and second slider 12 and is connected, worm wheel 16 front end meshing is connected with worm 17, worm 17 runs through second slider 12, worm 17 rotates with second slider 12 and is connected, and this kind of setting is convenient for change the height of projection lamp 18 as required, fully satisfies the teaching demand.

The projection lamp 18 is model TLED 320B.

The working process is as follows: all electrical appliances in the device are external power supplies, the device is powered on before the device is used, a teacher places a projection object on the object placing plate 3, then the projection lamp 18 is turned on to project the projection object on the projection plate 2, when the projection angle needs to be changed, the teacher presses the fixed rod 11, the fixed rod 11 drives the second gear 10 to move downwards, the spring 8 is compressed at the moment, the first sliding block 7 slides with the fixed block 9, the second gear 10 enables the friction block 4 to be separated from the contact with the base 1 under the help of the supporting plate 6, at the moment, the teacher rotates the fixed rod 11, the fixed rod 11 is meshed with the first gear 5, the object placing plate 3 rotates to change the projection angle of the projection object, when the distance between the projection lamp 18 and the projection object needs to be changed, the teacher rotates the first threaded shaft 13, the first threaded shaft 13 is spirally connected with the second sliding block 12 to enable the second sliding block 12 to slide, when the projection height of the projection lamp 18 needs to be changed, the teacher rotates the worm 17, the worm 17 engages with the worm wheel 16 to enable the worm wheel 16 to rotate, the worm wheel 16 drives the second threaded shaft 15 to rotate, and as the second threaded shaft 15 is in threaded connection with the third sliding block 14, the third sliding block 14 slides along with the second threaded shaft 15 when the second threaded shaft 15 rotates, so that the height of the projection lamp 18 is changed.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a demonstration teaching aid is used in mechanical drawing teaching, includes base (1), its characterized in that: the device is characterized in that a projection plate (2) is fixedly connected to the left end of the top end face of the base (1), an object placing plate (3) is arranged at the right end of the projection plate (2), the object placing plate (3) is rotatably connected with the base (1), the object placing plate (3) penetrates through the base (1), a friction block (4) is fixedly connected to the bottom end face of the object placing plate (3), a first gear (5) is fixedly connected to the bottom end face of the friction block (4), a supporting plate (6) is fixedly connected to the bottom end face of the first gear (5), a first sliding block (7) is rotatably connected to the central position of the bottom end face of the supporting plate (6), a fixed block (9) is slidably connected to the inner side of the first sliding block (7), the fixed block (9) is fixedly connected with the base (1), a second sliding block (12) is slidably connected to the right end of the top end face of the, and the top end surface of the third sliding block (14) is fixedly connected with a projection lamp (18).

2. A demonstration teaching aid for mechanical drawing teaching according to claim 1, characterized in that: the top end face of the fixed block (9) is fixedly connected with a spring (8), and the other end of the spring (8) is fixedly connected with the first sliding block (7).

3. A demonstration teaching aid for mechanical drawing teaching according to claim 1, characterized in that: first gear (5) right-hand member face meshing is connected with second gear (10), second gear (10) and layer board (6) sliding connection, second gear (10) top end face fixedly connected with dead lever (11), dead lever (11) run through base (1), dead lever (11) rotate with base (1) and are connected.

4. A demonstration teaching aid for mechanical drawing teaching according to claim 1, characterized in that: second slider (12) right-hand member face bottom end threaded connection has first screw thread axle (13), second slider (12) is run through in first screw thread axle (13), base (1) is run through in first screw thread axle (13), and first screw thread axle (13) rotate with base (1) and be connected.

5. A demonstration teaching aid for mechanical drawing teaching according to claim 1, characterized in that: the inboard threaded connection of third slider (14) has second threaded shaft (15), third slider (14) is run through in second threaded shaft (15), second threaded shaft (15) bottom end face fixedly connected with worm wheel (16), worm wheel (16) are rotated through pivot and second slider (12) and are connected, worm wheel (16) preceding terminal surface meshing is connected with worm (17), worm (17) run through second slider (12), worm (17) are rotated with second slider (12) and are connected.