CN214068152U

CN214068152U - Gear transmission demonstration teaching aid

Info

Publication number: CN214068152U
Application number: CN202120067649.0U
Authority: CN
Inventors: 张宇龙
Original assignee: Jinan vocational college
Current assignee: Jinan vocational college
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-08-27
Anticipated expiration: 2031-01-11

Abstract

The utility model relates to a gear transmission demonstration teaching aid, which comprises a white board, wherein the bottom of the white board is connected with a support rod, the lower end of the support rod is connected with a base, the white board is provided with a sliding groove, the outer side of one end of the sliding groove is provided with a variable frequency motor connected to the back of the white board, and the output shaft end of the variable frequency motor is connected with a first driving gear; the sliding groove is internally and slidably connected with a plurality of sliding adjusting assemblies used for connecting gears, the gears are rotatably connected with the sliding adjusting assemblies, and the modulus and the pressure angle of the first driving gear and the modulus of the gears are equal to those of the plurality of gears. The teaching aid can freely combine gears with different tooth numbers like building blocks to study and demonstrate gear transmission, and arouse the study interest of students for thinking and creating space of the students.

Description

Gear transmission demonstration teaching aid

Technical Field

The utility model relates to a machinery course teaching aid technical field specifically is a gear drive demonstration teaching aid.

Background

The mechanical principle is an important basic course of machinery major in colleges and universities, and the used main teaching aids comprise a gear tooth profile machining demonstration teaching aid, a four-bar linkage motion demonstration teaching aid, a cam demonstration teaching aid and the like, but the teaching aids related to gear transmission are few, and generally, a teacher draws pictures or PPT explains the teaching aids mainly, so that the teaching aids are not enough to have an image and are easy to cause a obscure and unintelligible feeling to students. The existing gear transmission teaching aid has the defects of single function, lack of interaction and the like, is generally only limited to teacher demonstration, is difficult for students to participate in, does not have a space for thinking and creating by themselves, and is difficult to stimulate the knowledge seeking of the students.

SUMMERY OF THE UTILITY MODEL

For overcoming the above-mentioned problem that exists among the prior art, the utility model provides a gear drive demonstration teaching aid can combine study, demonstration gear drive wantonly like building blocks with the gear of different numbers of teeth, thinks and the space of creation for the student, arouses student's interest in learning.

The utility model discloses a realize through following technical scheme:

a gear transmission demonstration teaching aid comprises a white board, wherein a supporting rod is connected to the bottom of the white board, the lower end of the supporting rod is connected with a base, a sliding groove is formed in the white board, a variable frequency motor connected to the back of the white board is arranged on the outer side of one end of the sliding groove, and the output shaft end of the variable frequency motor is connected with a first driving gear; the sliding groove is internally and slidably connected with a plurality of sliding adjusting assemblies used for connecting gears, the gears are rotatably connected with the sliding adjusting assemblies, and the modulus and the pressure angle of the first driving gear and the modulus of the gears are equal to those of the plurality of gears.

Preferably, the sliding adjustment assembly comprises a bolt rod in sliding connection in the sliding groove, two nuts in threaded connection on the bolt rod are arranged on the front side and the rear side of the sliding groove, the front end of the bolt rod is connected with a bearing seat, a gear rod is rotatably connected onto the bearing seat, and the front end of the gear rod is connected with a gear.

Preferably, the outer side of one end, far away from the driving gear I, of the sliding groove is rotatably connected with a rotating handle, and the front end of the rotating handle is connected with a driving gear II.

Preferably, a storage box is connected to the lower portion of the front side of the whiteboard, and a box cover is hinged to the top of the storage box.

Preferably, the supporting rod is a telescopic rod.

Preferably, the bottom of the base is connected with universal wheels.

Preferably, the front end of the gear rod is connected with a fan blade.

The utility model has the advantages that:

1. the whiteboard is provided with a sliding groove, the outer side of one end of the sliding groove is connected with a variable frequency motor, the output shaft end of the variable frequency motor is connected with a first driving gear, a plurality of sliding adjusting assemblies which are used for connecting gears are slidably connected in the sliding groove, and the gears are rotatably connected with the sliding adjusting assemblies. A student or a teacher can connect a plurality of gears with different tooth numbers to the sliding adjusting assembly, then adjust the left and right positions of the sliding adjusting assembly to enable the gears to be meshed in sequence, start the variable frequency motor to drive the driving gear to rotate so as to drive all the gears to rotate simultaneously, theoretically calculate the rotating speed of each gear, and then detect the actual rotating speed of each gear through a laser tachometer to verify whether the calculation is correct; after the verification of one group, the left and right positions among the gears are readjusted or the gears with other tooth numbers are replaced, and the rotating speed of the variable frequency motor is adjusted for verification. The teaching demonstration mode combining theory and practice enables students to participate in interest, gives the students a thinking and creating space, improves the learning desire of the students and the mastering degree of the knowledge of the students, and further improves the teaching level.

2. The outer side of one end, far away from the driving gear I, of the sliding groove is rotatably connected with a rotating handle, and the front end of the rotating handle is connected with a driving gear II. The rotation of each gear on the slip adjustment assembly is through the manual drive of driving gear, compares in inverter motor drive that student's participation feels stronger.

3. The bin is connected with to blank front side below, and the bin top articulates there is the case lid, can be used for placing more different tooth number's spare gear in the bin, and the gear that the student demonstrates the exercise usefulness is more, and carries the storage facility.

4. The bracing piece is the telescopic link, through the user of the adaptable different heights of height-adjusting.

5. The base bottom is connected with the universal wheel for this teaching aid removes more conveniently.

6. The front end of the gear rod is connected with the fan blades, the gear can drive the fan blades to rotate when rotating, linkage elements are more, and interestingness is stronger.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a front view of the present invention.

Fig. 2 is a schematic top view of the present invention.

Fig. 3 is a schematic side view of the present invention.

Fig. 4 is a schematic perspective view of the present invention.

Fig. 5 is a schematic perspective view of the present invention.

Fig. 6 is a schematic structural view of the sliding adjustment assembly of the present invention.

In the figure, 1-white board, 11-sliding groove, 2-supporting rod, 3-base, 31-universal wheel, 4-gear, 41-gear rod, 42-fan blade, 5-driving gear I, 51-variable frequency motor, 6-driving gear II, 61-rotating handle, 7-storage box, 71-box cover, 8-sliding adjusting component, 81-bolt rod, 82-nut and 83-bearing seat.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1 to 6, the utility model relates to a gear drive demonstrates teaching aid, including blank 1, 1 bottom fixedly connected with bracing piece 2 of blank, 2 lower extremes of bracing piece are connected with base 3, and above-mentioned structure is current structure, and blank 1 can regard as the ordinary blank of writing to use, can erase and write repeatedly, and when doing the gear drive demonstration, teacher or student can write with oil pen on it.

The sliding groove 11 of left and right directions has been seted up on whiteboard 1, and the sliding groove 11 left end outside is equipped with the inverter motor 51 of connection at the whiteboard 1 back, and inverter motor 51's output shaft end is connected with driving gear 5, can drive driving gear 5 through inverter motor 51's rotation and rotate, provides rotation power for right side and driving gear 5 meshed gear 4.

Sliding connection has a plurality of to be used for connecting the sliding adjustment subassembly 8 of gear 4 in sliding tray 11, and sliding adjustment subassembly 8 includes sliding connection in sliding tray 11 the shank of bolt 81, as shown in fig. 6, sliding tray 11 front side and rear side are equipped with two nuts 82 of threaded connection on shank of bolt 81, and the shank of bolt 81 front end is connected with bearing frame 83, and rotatable coupling has gear pole 41 on bearing frame 83, and gear pole 41 front end is connected with gear 4, driving gear 5 and a plurality of the modulus, the pressure angle homogeneous phase of gear 4 equal. In this embodiment, taking two gears 4 as an example, as shown in fig. 4, the gears 4 are fixed on a gear rod 41, and then the rear end of the gear rod 41 is inserted into the bearing inner ring of the bearing seat 83 in an interference fit manner, so that the gears 4 can rotate freely on the bearing seat 83; moving the position of the leftmost gear 4, namely, the bolt rod 81 at the rear side of the gear slides in the sliding groove 11, so that the gear 4 is meshed with the first driving gear 5, and then tightening the nut 82 at the rear side of the bolt rod 81 to fix the sliding adjusting assembly 8 on the sliding groove 11; the other gear 4 is moved in the same manner so that the left and right gears 4 mesh. During demonstration, after the variable frequency motor 51 is started, the driving gear I5 rotates to drive the two gears 4 on the right side to rotate simultaneously, the rotating speed of each gear is calculated according to the output rotating speed of the variable frequency motor 51 and the tooth number theory of each gear, and then the actual rotating speed of each gear is detected through the laser tachometer to verify whether the calculation is correct; after the verification of one group, the left and right positions between the gears are readjusted or the gears with other teeth are replaced, and the rotating speed of the variable frequency motor 51 is adjusted for verification. The teaching demonstration mode combining theory and practice enables students to participate in interest, gives the students a thinking and creating space, improves the learning desire of the students and the mastering degree of the knowledge of the students, and further improves the teaching level.

The outer side of one end of the sliding groove 11 far away from the driving gear I5 is rotatably connected with a rotating handle 61, and the front end of the rotating handle 61 is connected with a driving gear II 6. As shown in fig. 5, fig. 5 is a schematic diagram of manual demonstration gear transmission, the manual driving rotation handle 61 drives the second driving gear 6 to rotate, and the second driving gear 6 rotates to drive the two gears on the left side of the meshing fit to rotate. Compared with the driving of a variable frequency motor, the manual driving mode has stronger student participation and improves the learning interest of students.

The storage box 7 is connected to the lower portion of the front side of the whiteboard 1, and a box cover 71 is hinged to the top of the storage box 7. The storage box 7 is used for placing more spare gears 4 with different tooth numbers, and more gears 4 for the student to demonstrate exercise are used; the gear 4 is placed in the storage box 7, and the carrying and the storage are more convenient.

The supporting rod 2 is a telescopic rod and can adapt to users with different heights by adjusting the height of the supporting rod 2.

The bottom of the base 3 is connected with a universal wheel 31, so that the teaching aid is more convenient to move.

The front end of the gear rod 41 is connected with the fan blades 42, the gear 4 can drive the fan blades 42 to rotate when rotating, linkage elements are more, and interestingness is stronger.

The working process is as follows: taking out the gears 4 with different tooth numbers from the storage box 7 and respectively installing the gears 4 on different sliding adjusting assemblies 8 in the sliding grooves 11, and moving the sliding adjusting assemblies 8 to enable the gears 4 to be meshed with each other and the gears 4 to be meshed with the driving gear I5 (driving gear II 6); starting the variable frequency motor 51 (or rotating the rotating handle 61) to enable the driving gear I5 (or the driving gear II 6) to drive the gears 4 which are meshed with each other to rotate simultaneously; calculating the rotating speed of each gear 4 according to the tooth number theory of each gear 4, and then detecting the actual rotating speed of each gear 4 by using a laser tachometer to verify whether the calculation is correct; the gear 4 with the left and right positions readjusted among the gears 4 or the other teeth number is replaced for demonstration and calculation verification.

In the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present invention, but do not require the present invention to be constructed or operated in a specific orientation, and therefore, cannot be construed as limiting the present invention. The terms "connected" and "connected" in the present invention are to be understood in a broad sense, and may be connected or detachably connected, for example; the terms may be directly connected or indirectly connected through intermediate components, and specific meanings of the terms may be understood as specific conditions by those skilled in the art.

The foregoing is a preferred embodiment of the present invention, and the description of the specific embodiments is only for better understanding of the idea of the present invention. To those skilled in the art, many modifications and equivalents may be made in accordance with the principles of the present invention and are deemed to fall within the scope of the invention.

Claims

1. The utility model provides a gear drive demonstration teaching aid, includes blank (1), blank (1) bottom is connected with bracing piece (2), bracing piece (2) lower extreme is connected with base (3), its characterized in that: a sliding groove (11) is formed in the whiteboard (1), a variable frequency motor (51) connected to the back of the whiteboard (1) is arranged on the outer side of one end of the sliding groove (11), and a first driving gear (5) is connected to an output shaft end of the variable frequency motor (51); sliding connection has a plurality of sliding adjustment subassembly (8) that are used for connecting gear (4) in sliding tray (11), gear (4) and sliding adjustment subassembly (8) rotatable coupling, driving gear (5) and a plurality of the modulus, the pressure angle homogeneous phase of gear (4) are equal.

2. A gear transmission demonstration teaching aid according to claim 1, wherein: slide adjusting part (8) include sliding connection in sliding tray (11) shank of bolt (81), sliding tray (11) front side and rear side are equipped with two nuts (82) of threaded connection on shank of bolt (81), shank of bolt (81) front end is connected with bearing frame (83), rotatable coupling has gear pole (41) on bearing frame (83), gear pole (41) front end is connected with gear (4).

3. A gear transmission demonstration teaching aid according to claim 2 wherein: the outer side of one end, far away from the driving gear I (5), of the sliding groove (11) is rotatably connected with a rotating handle (61), and the front end of the rotating handle (61) is connected with a driving gear II (6).

4. A gear transmission demonstration teaching aid according to claim 3 wherein: whiteboard (1) front side below is connected with bin (7), bin (7) top articulates there is case lid (71).

5. A gear transmission demonstration teaching aid according to claim 4, wherein: the supporting rod (2) is a telescopic rod.

6. A gear transmission demonstration teaching aid according to claim 5, wherein: the bottom of the base (3) is connected with a universal wheel (31).

7. A gear transmission demonstration teaching aid according to any one of claims 2 to 6 wherein: the front end of the gear rod (41) is connected with fan blades (42).