CN215679843U

CN215679843U - Mechanical principle teaching aid based on assembly of connecting rod and ratchet pawl

Info

Publication number: CN215679843U
Application number: CN202122049190.4U
Authority: CN
Inventors: 杨高炜; 薛宏伟; 王文杰
Original assignee: Inner Mongolia University of Science and Technology
Current assignee: Inner Mongolia University of Science and Technology
Priority date: 2021-08-28
Filing date: 2021-08-28
Publication date: 2022-01-28
Anticipated expiration: 2031-08-28

Abstract

A mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel pawl comprises a closing button, a starting button, a shell, a partition plate, a mechanical device, a handle, a lifting handle and a box plate, wherein the closing button is arranged on the right side of the starting button, and the closing button and the starting button are arranged on the upper side of the left end of the shell side by side; the baffle is arranged in the shell; the mechanical device is arranged on the partition plate and also arranged inside the shell; the handle is arranged at the top end of the shell; the handle is arranged on the box board; the boxboard is arranged behind the shell, and the two ends of the boxboard are arranged on the grooves at the two ends of the shell. A close button and an activate button for turning the device on and off; the partition can make the mechanical device show more clearly.

Description

Mechanical principle teaching aid based on assembly of connecting rod and ratchet pawl

Technical Field

The utility model belongs to the field of mechanical basic experimental equipment, and particularly relates to a mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel and a pawl.

Background

The mechanical principle is a technical basic course, and the most remarkable characteristic is the combination of basic theory and engineering practice. The research content of the mechanism is the composition principle and the movement certainty of the mechanism structure, and the movement analysis and the synthesis of the mechanism. Clearances between contacting surfaces of the components, elastic or differential thermal deformation of the components, and errors caused by manufacturing and assembly are generally not considered. At present, the mechanical principle mechanism display is basically completed in a mechanical principle display cabinet in a laboratory, and the main problems exist that students cannot learn theoretical knowledge and perform structural verification at the same time in the course of teaching, and the perfect combination of theory and practice cannot be achieved only by paying attention to the demonstration effect in later experiments.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model provides a mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel and a pawl.

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

The mechanical device comprises a driving wheel, a small fixed rod, a short connecting rod, a sliding rail, a sliding block, a long connecting rod, a pawl, a ratchet wheel, a rocker arm, a large fixed rod and a motor, wherein the driving wheel is fixed on the partition plate, and the other end of the driving wheel is connected to the motor behind the partition plate; the five small fixed rods are respectively used for fixing the driving wheel and the short connecting rod, the short connecting rod and the sliding block, the sliding block and the two long connecting rods; one end of the short connecting rod is connected with the driving wheel, and the other end of the short connecting rod is connected with the sliding block; the slide rail is arranged at the center of the clapboard; the slide block is arranged on the slide rail, and two ends of the slide block are respectively connected with the short connecting rod and the two long connecting rods; the other ends of the two long connecting rods are respectively connected to the two rocker arms; the two pawls are respectively arranged on the two rocker arms; the ratchet wheel is fixed on the clapboard by a large fixed rod; the two rocker arms and the ratchet wheel are fixed by a large fixing rod, and the two rocker arms are arranged above the ratchet wheel; the large fixed rod and the motor are arranged behind the partition plate. After the start button is pressed, the motor rotates to drive the driving wheel, the short connecting rod, the sliding block, the long connecting rod, the pawl, the ratchet wheel and the rocker arm device to move.

Compared with the prior art, the utility model has the following beneficial effects:

1. the handle is arranged at the top of the portable multifunctional chair, so that the portable multifunctional chair is convenient to carry;

2. the transparent observation window is arranged right in front of the demonstration cabin, so that students can more intuitively observe the mechanical motion working principle in the demonstration cabin through the transparent observation window; the cognition and the learning of students are more comprehensive;

3. the arrangement of the partition board is beneficial to enhancing the shielding effect, and the structure is simple, the operation is convenient, and the device is economical and practical; 4. the utility model can also detach the internal structure, which is convenient for students to observe the internal structure more carefully.

Drawings

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

FIG. 2 is a schematic rear view of the overall structure of the present invention;

FIG. 3 is a schematic view of the mechanism of the present invention;

fig. 4 is a back schematic view of the mechanism of the present invention.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 1 and 2, the mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel and a pawl comprises a closing button 1, a starting button 2, a shell 3, a partition plate 4, a mechanical device 5, a handle 6, a handle 7 and a box plate 8, wherein the closing button 1 is arranged on the right side of the starting button 2, and the closing button 1 and the starting button 2 are arranged on the upper side of the left end of the shell 3 side by side; the partition 4 is inside the casing 3; the mechanical device 5 is on the partition 4, also inside the casing 3; the handle 6 is arranged at the top end of the shell 3; the handle 7 is arranged on the box plate 8; the box plate 8 is behind the housing 3 and the two ends of the box plate 8 are placed in the grooves at the two ends of the housing 3. A transparent observation window is arranged right in front of the shell 3, and after the mechanical device 5 is started, the movement of the mechanical device 5 can be checked through the transparent observation window; the partition 4 contributes to enhancing the shielding effect; the box plate 8 can be detached from the housing 3 by means of the handle 7, facilitating the replacement of the motor 511.

Referring to fig. 3 and 4, the mechanical device 5 includes a driving wheel 51, a small fixing rod 52, a short connecting rod 53, a sliding rail 54, a sliding block 55, a long connecting rod 56, a pawl 57, a ratchet 58, a rocker 59, a large fixing rod 510, and a motor 511, wherein the driving wheel 51 is fixed on the partition board 4, and the other end of the driving wheel 51 is connected to the motor 511 behind the partition board 4; the five small fixing rods 52 are respectively used for fixing the driving wheel 51 and the short connecting rod 53, the short connecting rod 53 and the sliding block 55, the sliding block 55 and the two long connecting rods 56; one end of the short connecting rod 53 is connected with the driving wheel 51, and the other end is connected with the sliding block 55; the slide rail 54 is placed at the center of the partition board 4; the slide block 55 is arranged on the slide rail, and two ends of the slide block are respectively connected with the short connecting rod 53 and the two long connecting rods 56; the other ends of the two long connecting rods 56 are respectively connected to the two rocker arms 59; the two pawls 57 are respectively mounted on the two rocker arms 59; the ratchet wheel 58 is fixed on the clapboard 4 by a large fixing rod 510; both the two rocker arms 59 and the ratchet wheel 58 are fixed by a large fixing rod 510, and the two rocker arms 59 are above the ratchet wheel 58; the large fixing bar 510 and the motor 511 are both behind the partition 4. After the start button 2 is pressed, the motor 511 rotates to drive the driving wheel 51 to rotate, the short connecting rod 53 connected with the driving wheel 51 drives the sliding block 55 to move on the sliding rail 54, the two long connecting rods 56 connected with the other end of the sliding block 55 drive the two rocker arms 59 to move, the two rocker arms 59 control the two pawls 57 to move, and the pawls 57 push the ratchet wheel 58 to make unidirectional intermittent motion.

The operation and running process of the utility model are as follows:

when a user is ready to use, the handle 6 is lifted, the box plate 8 is opened by using the lifting handle 7 after the user brings the electric box to a designated position, and the using state of the motor 511 is checked; if the state is good, the box plate 8 is closed, the start button 2 is pressed, the motor 511 rotates to drive the driving wheel 51 to rotate, the short connecting rod 53 connected with the driving wheel 51 drives the sliding block 55 to do reciprocating linear motion on the sliding rail 54, the two long connecting rods 56 connected with the other end of the sliding block 55 drive the two rocker arms 59 to move, the two rocker arms 59 control the two pawls 57 to move, and the pawls 57 push the ratchet wheel 58 to do unidirectional intermittent motion. After the observation is finished, pressing a closing button 1; each of the components of the present invention can be seen disassembled by removing the small securing rod 52 and the large securing rod 510.

Claims

1. A mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel and a pawl is characterized by comprising a closing button (1), a starting button (2), a shell (3), a partition plate (4), a mechanical device (5), a handle (6), a lifting handle (7) and a box board (8), wherein the closing button (1) is arranged on the right side of the starting button (2), and the closing button (1) and the starting button (2) are arranged on the upper side of the left end of the shell (3) side by side; the partition plate (4) is arranged inside the shell (3); the mechanical device (5) is arranged on the partition plate (4) and also inside the shell (3); the handle (6) is arranged at the top end of the shell (3); the handle (7) is arranged on the box board (8); the box plate (8) is arranged behind the shell (3), and the two ends of the box plate (8) are arranged on the grooves at the two ends of the shell (3).

2. The mechanical principle teaching aid based on assembly of a connecting rod and a ratchet wheel and a pawl of claim 1, wherein the mechanical device (5) comprises a driving wheel (51), a small fixing rod (52), a short connecting rod (53), a sliding rail (54), a sliding block (55), a long connecting rod (56), a pawl (57), a ratchet wheel (58), a rocker arm (59), a large fixing rod (510) and a motor (511), wherein the driving wheel (51) is fixed on the partition plate (4), and the other end of the driving wheel (51) is connected to the motor (511) behind the partition plate (4); the five small fixing rods (52) are respectively used for fixing the driving wheel (51) and the short connecting rod (53), the short connecting rod (53) and the sliding block (55), the sliding block (55) and the two long connecting rods (56); one end of the short connecting rod (53) is connected with the driving wheel (51), and the other end is connected with the sliding block (55); the sliding rail (54) is arranged at the center of the clapboard (4); the sliding block (55) is arranged on the sliding rail, and two ends of the sliding block are respectively connected with the short connecting rod (53) and the two long connecting rods (56); the other ends of the two long connecting rods (56) are respectively connected to the two rocker arms (59); the two pawls (57) are respectively arranged on the two rocker arms (59); the ratchet wheel (58) is fixed on the clapboard (4) by a big fixed rod (510); the two rocker arms (59) and the ratchet wheel (58) are fixed by a large fixing rod (510), and the two rocker arms (59) are arranged above the ratchet wheel (58); the large fixing rod (510) and the motor (511) are arranged behind the partition board (4).