CN211349909U

CN211349909U - Demonstration appliance with common structure of general technology

Info

Publication number: CN211349909U
Application number: CN201922146346.3U
Authority: CN
Inventors: 吴婷婷
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-08-25
Anticipated expiration: 2029-12-04

Abstract

The utility model relates to the field of teaching aids, and discloses a demonstration tool with a common structure of the general technology, which comprises a base, a lifting support device, a four-bar structure demonstration device and a handle, wherein the four-bar structure demonstration device comprises a base, a rotating shaft, a first bar, a second bar, a connecting rod and a connecting shaft, the first bar, the connecting rod and the second bar are all provided with a telescopic device, can be freely stretched and fixed, and can be adjusted in length within a certain range; the lifting support device can be folded at any time, and is convenient to store; the utility model discloses can show three-dimensional four-bar linkage to students, give and to grasp four-bar linkage's various extensions through the in-service operation, improve teaching efficiency.

Description

Demonstration appliance with common structure of general technology

Technical Field

The utility model relates to a teaching aid field specifically is a presentation apparatus of common structure of general technique.

Background

In the teaching of general technical subjects, every time the teaching of a complex and boring mechanical structure is involved, a teacher often teaches knowledge points through detailed character explanation and simple blackboard drawing, but the static teaching mode is dry and astringent for the mechanical structure needing to dynamically operate, and the teaching effect is not ideal.

Although some teachers can use courseware with simple animations, the dynamic display teaching mode is improved to a certain extent compared with the traditional static teaching mode, high school students have few contacts with mechanical structures, the principle and the motion form of the structures cannot be mastered in the simple simulation of the animations, and the teaching effect is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a presentation appliance of common structure of general technique can be more vivid show four-bar linkage to classmates, improves teacher's efficiency of giving lessons, makes classroom teaching more high-efficient.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a demonstration appliance with a common structure in the general technology is characterized in that: comprises a base, a lifting support device, a four-bar structure demonstration device and a handle. The four-bar mechanism demonstration device comprises a base, a rotating shaft, a first bar, a connecting rod, a second bar and a connecting shaft, wherein the first bar and the second bar are both provided with telescopic devices, the base replaces a rack of the four-bar mechanism, and other three bars can change the telescopic state within a certain range to demonstrate various different conditions of the four-bar mechanism.

Preferably, the first rod is rotatably connected to one end of the front end face of the base through the rotating shaft, and the second rod is rotatably connected to the other end of the front end face of the base through the rotating shaft; the connecting rod is rotatably connected between the first rod and the second rod through a connecting shaft. One of the first rod and the second rod can be selected as a driving part, and the other one can be used as a driven part.

Preferably, the base up end is equipped with the support, the terminal surface is equipped with the fixed axle before the base, lift strutting arrangement includes that the annular is detained, the annular is detained button, bracing piece group is including bracing piece one and bracing piece two, one rotation of bracing piece is connected on the support, two rotation of bracing piece are connected on the fixed axle, bracing piece one the free end of bracing piece two with the annular is detained and is rotated the connection, the annular is detained button sliding connection and is in the through-hole that the annular was detained, each other is the mirror image in the installation of bracing piece group left and right sides, will two when the device is in idle state in the annular is detained the button is opened, lift strutting arrangement alright with folding shrink, be convenient for accomodate, save space.

Preferably, the first rod and the second rod both comprise a fixed end and a sliding end, a sliding device is arranged in the first rod and the second rod, the fixed end and the sliding end are connected in a sliding mode through the sliding device, and the connecting rod 35 is provided with the telescopic device 5.

Preferably, the connecting rod is composed of a middle end and two connecting rod sliding ends, the middle end and the two sliding ends are respectively provided with a sliding device and a telescopic device, and the connecting rod can be used as the longest rod and the shortest rod.

Slide device includes slide rail, slider and draw runner, and is three the slide rail is established respectively stiff end internal surface left end face, right-hand member face and terminal surface down, two the slider is established respectively terminal surface about the slip end, the draw runner is established terminal surface under the slip end, the slider the draw runner respectively in the slide rail constitutes sliding connection, the draw runner with the slider can the slide rail internal motion guarantees the stationarity of mechanism.

Preferably, the telescopic device includes a wedge-shaped groove, a baffle, a rotating shaft, a spring leaf and a shifting piece, the wedge-shaped groove is arrayed on the upper end surface of the sliding end, the baffle is rotatably connected in the fixed end or the middle end cavity through the rotating shaft, the spring leaf is fixedly connected between the upper surface of the fixed end or the middle end cavity and the baffle, one end of the rotating shaft penetrates through the side wall of the fixed end and is located outside the fixed end, the shifting piece is fixedly connected to the exposed end of the rotating shaft exposed outside the fixed end or the middle end, the spring leaf presses the baffle in the wedge-shaped groove, so that the telescopic end can only move outwards, when the shifting piece is shifted, the baffle is not in the wedge-shaped groove, the telescopic end can be retracted into the fixed end or the middle end cavity, and the side surface of the telescopic end is provided with a distance mark, the length of the rod can be confirmed specifically.

Preferably, the handle install in base rear end face, with the base constitutes to rotate and is connected, with the axis of rotation constitutes fixed connection, need not to rotate the initiative pole during actual operation, only need with the handle is installed at the initiative pole in the axis of rotation, rotate the demonstration can be accomplished to the handle.

The beneficial effects of the utility model reside in that:

the utility model discloses be equipped with lift strutting arrangement, can receive and release freely, can save space when not using, be convenient for accomodate, can put in the box with very little volume, improve space utilization, lift strutting arrangement adopts the fixed stability that has increased the device of more stable triangle-shaped.

The utility model discloses replace the frame with the base, other three pole lengths can be adjusted wantonly in the certain limit accurately, can accomplish most four-bar linkage's demonstration, and telescopic machanism easy operation, convenient to use can let the student operate in person, and the various four-bar linkage of contact in person, the memory is more profound, understands more thoroughly, has greatly improved learning efficiency.

Drawings

Fig. 1 is a rear view of the structure diagram of the present invention.

Fig. 2 is an isometric view of the retractor device of the present invention.

Fig. 3 is a cross-sectional view of the telescopic device of the present invention.

Fig. 4 is an isometric view of a first rod, a second rod, and a connecting rod of the present invention.

Fig. 5 is a view of the sliding device of the present invention.

Fig. 6 is a cross-sectional view showing the ring buckle of the present invention.

In the figure: 1 base, 11 supports, 2 lifting supporting devices, 21 circular buckles, 22 circular buckle buttons, 23 supporting rod groups, 231 supporting rod I, 232 supporting rod II, 3 four-rod structure demonstration devices, 31 bases, 311 fixing shafts, 32 rotating shafts, 33 rod I, 331 fixing ends, 332 sliding ends, 34 rod II, 35 connecting rods, 351 middle ends, 352 connecting rod sliding ends, 36 connecting shafts, 4 sliding devices, 41 sliding rails, sliding blocks 42,

sliding strips

43, 5 telescopic devices, 51 wedge-shaped grooves, 52 baffles, 53 rotating shafts, 54 spring pieces, 55 shifting pieces and 6 handles.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be understood that the terms "front end face", "rear end face", "left side", "right side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1-6, a demonstration device with a common structure in the general technology comprises a base 1, a lifting support device 2, a four-bar structure demonstration device 3 and a handle 6. The four-bar structure demonstration device 3 comprises a base 31, a rotating shaft 32, a first bar 33, a second bar 34, a connecting rod 34 and a connecting shaft 36, wherein the first bar 33, the connecting rod 35 and the second bar 34 are all provided with telescopic devices 5, the device can be switched among various mechanisms at will, the first bar 33 and the second bar 34 are installed in a mode of being attached to the base 31, and the connecting rod 35 is installed on the outer sides of the first bar 33 and the second bar 34 to prevent interference during rotation.

The first rod 33 is rotatably connected to one end of the front end face of the base 31 through a rotating shaft 32, and the second rod 35 is rotatably connected to the other end of the front end face of the base 31 through the rotating shaft 32; the connecting rod 34 is rotatably connected between the first rod 33 and the second rod 35 through a connecting shaft 36, one end of the rotating shaft 32 is in key connection with the rod, the other end of the rotating shaft is square, extends into the base and is fixedly connected with the handle 6, the handle 6 is installed on the rear end face of the base 31 and is rotatably connected with the base 31, and the rotating shaft 32 and the rod can be driven to rotate.

The up end of base 1 is equipped with two supports 11, the terminal surface is equipped with two fixed axles 311 before the base 31, lift strutting arrangement 2 includes that two rings form detain 21, two rings form detain button 22, two bracing piece groups 23, bracing piece group 23 includes bracing piece one 231 and bracing piece two 232, bracing piece one 231 rotates to be connected on support 11, bracing piece two 232 rotates to be connected on fixed axle 311, bracing piece one 231, the free end of bracing piece two 232 is detained 21 with the ring and is rotated and be connected, the ring is detained in the through-hole that button 22 sliding connection ring was detained 21, the installation of bracing piece group 23 left and right sides is each other the mirror image, two rings form detain 21 and install in two bracing piece groups 23 both sides, it is to it with two rings form detain 21 centre of a circle when needing fixed stay, then detain the button 22.

The first rod 33 and the second rod 34 comprise a fixed end 331 and a sliding end 332, the connecting rod 35 is composed of a middle end 351 and two connecting rod sliding ends 352, and the lengths of the three rods can all meet the adjustment from the shortest rod to the longest rod so as to combine to form a more four-bar mechanism. The first rod 33, the second rod 34 and the connecting rod 35 are internally provided with the sliding device 4, the sliding device 4 comprises three sliding rails 41, two sliding blocks 42 and a sliding strip 43, the three sliding rails 41 are respectively arranged on the left end surface, the right end surface and the lower end surface in the cavity of the fixed end 331 or the middle end 351, the two sliding blocks 42 are respectively arranged on the left end surface and the right end surface of the sliding end 332, the sliding strip 43 is arranged on the lower end surface of the sliding end 332, the sliding blocks 42 and the sliding strip 43 respectively form sliding connection in the sliding rails 41, the sliding strip device 4 can enable the telescopic device 5 to operate more stably, the sliding blocks 42 can play a role in limitation, and the sliding end 332 is prevented.

The telescopic device 5 comprises a wedge-shaped groove 51, a baffle plate 52, a rotating shaft 53, a spring piece 54 and a shifting piece 55, wherein a plurality of wedge-shaped grooves 51 are linearly arrayed on the upper end surface of the sliding end 332 or the connecting rod sliding end 352, the baffle plate 52 is rotatably connected in the fixed end 331 or the middle end 351 cavity through the rotating shaft 53, the spring piece 54 is fixedly connected between the upper surface in the fixed end 331 or the middle end 351 cavity and the baffle plate 52, the shifting piece 55 is fixedly connected on the rotating shaft 53 positioned on the outer side of the fixed end 331 or the middle end 351, the baffle plate 52 extends into the wedge-shaped groove 51 under the condition that the shifting piece 55 is not subjected to external force, only the shifting piece is allowed to move in the direction, the baffle plate 52 can leave the wedge-shaped groove 51 through the length of a scale adjusting rod on the side surface of the sliding end 332 or the connecting rod sliding end.

The using method comprises the following steps: lifting the device to the position where the two ring buttons 21 are aligned, and pressing the ring button buttons 22 into the ring buttons 21 respectively to complete the fixation; selecting the lengths of three rods according to the rod lengths of different mechanisms, and adjusting the lengths of the three rods by using a telescopic device 5 to determine a driving rod and a driven rod; the handle 6 is arranged in the shaft hole of the driving rod on the rear end surface of the base 31 and is fixedly connected with the connecting shaft 36, and the movement conditions of the three rods are observed by rotating the handle 6.

Further, the above-mentioned fixed connection and fixed mounting are to be understood in a broad sense unless otherwise specifically stated or limited, and may be, for example, welding, gluing, or integrally formed, as is conventional in the art.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A demonstration appliance with a common structure in the general technology is characterized in that: comprises a base (1), a lifting support device (2), a four-bar structure demonstration device (3) and a handle (6); the four-bar structure demonstration device (3) comprises a base (31), a rotating shaft (32), a first rod (33), a second rod (34), a connecting rod (35) and a connecting shaft (36), wherein the first rod (33) and the second rod (34) are provided with telescopic devices (5).

2. A presentation instrument of generally conventional construction according to claim 1, wherein: the first rod (33) is rotatably connected to one end of the front end face of the base (31) through the rotating shaft (32), and the second rod (34) is rotatably connected to the other end of the front end face of the base (31) through the rotating shaft (32); the connecting rod (35) is rotatably connected to the outer sides of the first rod (33) and the second rod (34) through the connecting shaft (36).

3. A presentation instrument of generally conventional construction according to claim 1, wherein: base (1) up end is equipped with support (11), base (31) are equipped with fixed axle (311), lift strutting arrangement (2) detain (21), annular including the annular and detain button (22) and bracing piece group (23), bracing piece group (23) are including bracing piece (231) and bracing piece two (232), bracing piece (231) rotate to be connected on support (11), bracing piece two (232) rotate to be connected on fixed axle (311), bracing piece (231) the free end of bracing piece two (232) with the annular is detained and is rotated the connection, the annular is detained button (22) sliding connection and is in the through-hole that (21) were detained to the annular, the bracing piece group (23) left and right sides installation is the mirror image for each other.

4. A presentation instrument of generally conventional construction according to claim 1, wherein: first pole (33) and second pole (34) all include stiff end (331) and slip end (332), first pole (33) with be equipped with slider (4) in second pole (34), stiff end (331) and slip end (332) pass through slider (4) sliding connection, connecting rod (35) are equipped with telescoping device (5).

5. A presentation instrument of generally conventional construction according to claim 4, wherein: the connecting rod (35) is composed of a middle end (352) and two connecting rod sliding ends (351), and the middle end (352) and the two connecting rod sliding ends (351) are both provided with a sliding device (4) and a telescopic device (5).

6. A presentation instrument of generally conventional construction according to claim 4, wherein: slider (4) include slide rail (41), slider (42) and draw runner (43), establish slide rail (41) stiff end (331) intracavity surface left end face, right-hand member face and terminal surface down, establish slider (42) terminal surface about slide end (332), draw runner (43) are established terminal surface under slide end (332), slider (42) draw runner (43) with slide rail (41) constitute sliding connection.

7. A presentation instrument of generally conventional construction according to claim 5, wherein: the telescopic device (5) comprises a wedge-shaped groove (51), a baffle (52), a rotating shaft (53), a spring piece (54) and a shifting piece (55), wherein the wedge-shaped groove (51) is arranged on the upper end surface of the sliding end (332), the baffle (52) is rotatably connected in the cavity of the fixed end (331) or the middle end (352) through the rotating shaft (53), one end of the rotating shaft (53) penetrates through the side wall of the fixed end (331) or the middle end (352) and is positioned outside the fixed end or the middle end (352), the spring piece (54) is fixedly connected between the upper surface in the cavity of the fixed end (331) or the middle end (352) and the baffle (52), and the shifting piece (55) is fixedly connected at the exposed end of the rotating shaft (53) exposed out of the fixed end (331) or the middle end (352).

8. A presentation instrument of generally conventional construction according to claim 1, wherein: the handle (6) is arranged on the rear end face of the base (31), is rotatably connected with the base (31), and is fixedly connected with the rotating shaft (32).