Planar linkage teaching device

Abstract

The utility model discloses a plane connecting rod mechanism teaching device which comprises a connecting rod driving mechanism, a connecting rod assembly, a track extraction assembly, a single-chip microcomputer control system and an upper computer system, the driving end of the connecting rod driving mechanism is connected with the connecting rod assembly, the track extraction assembly is arranged on the connecting rod assembly, and the single-chip microcomputer control system is connected with the upper computer system. The signal output end of the track extraction assembly is connected with the single-chip microcomputer control system, the control signal output end of the single-chip microcomputer control system is connected with the connecting rod driving mechanism, and the data transmission end of the single-chip microcomputer control system is connected with the upper computer system. The plane connecting rod teaching device is suitable for teaching of mechanical courses, can effectively enhance understanding and mastering of mechanical principles by students, and improves teaching effects and learning motivation.

Description

Technical Field

[0001] The utility model relates to a teaching auxiliary device, in particular to a plane connecting rod mechanism teaching device. Background Art

[0002] In the teaching of mechanical courses, the connecting rod mechanism is one of the most basic and common mechanical structures, which is used to explain and demonstrate the principles of mechanical motion. Traditional planar connecting rod teaching devices usually require manual operation, which is inconvenient for data collection and difficult to analyze motion trajectories. This device may increase the students' operating burden during the teaching process and reduce the teaching effect. Summary of the invention

[0003] The utility model aims to provide a teaching device for a planar connecting rod mechanism.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented according to the following technical scheme:

[0005] The utility model comprises a connecting rod driving mechanism, a connecting rod assembly, a trajectory extraction assembly, a single-chip microcomputer control system and a host computer system, wherein the driving end of the connecting rod driving mechanism is connected to the connecting rod assembly, the trajectory extraction assembly is arranged on the connecting rod assembly, the signal output end of the trajectory extraction assembly is connected to the single-chip microcomputer control system, the control signal output end of the single-chip microcomputer control system is connected to the connecting rod driving mechanism, and the data transmission end of the single-chip microcomputer control system is connected to the host computer system.

[0006] Furthermore, the connecting rod drive mechanism includes a metal base plate, a first drive motor, and a second drive motor. The first drive motor and the second drive motor are detachably connected to the metal base plate, the driving ends of the first drive motor and the second drive motor are connected to the connecting rod assembly, and the control signal input ends of the first drive motor and the second drive motor are connected to the control signal output end of the single-chip control system.

[0007] Further, the connecting rod assembly includes a first telescopic adjustment link, a second telescopic adjustment link, and a third telescopic adjustment link. One end of the first telescopic adjustment link is fixedly connected to the rotating shaft of the first driving motor, the other end of the first telescopic adjustment link is rotatably connected to one end of the third telescopic adjustment link, the other end of the third telescopic adjustment link is rotatably connected to one end of the second telescopic adjustment link, the other end of the second telescopic adjustment link is fixedly connected to the rotating shaft of the second driving motor, the telescopic adjustment of the first telescopic adjustment link, the second telescopic adjustment link, and the third telescopic adjustment link are all fixedly adjusted by a connecting rod adjustment locking bolt, and the trajectory extraction assembly is fixedly installed on the third telescopic adjustment link.

[0008] Specifically, the trajectory extraction component includes a Y-axis reflection plate, an X-axis reflection plate, a trajectory extraction device, a Y-axis rangefinder, and an X-axis rangefinder. The Y-axis reflection plate is fixedly arranged on an edge of the Y-axis of the metal base plate, the X-axis reflection plate is fixedly arranged on an edge of the X-axis of the metal base plate, the trajectory extraction device is fixedly arranged on the middle section of the third telescopic adjustment link, the Y-axis rangefinder is arranged in the Y-axis direction of the trajectory extraction device, and the X-axis rangefinder is arranged in the X-axis direction of the trajectory extraction device. The signal output ends of the Y-axis rangefinder and the X-axis rangefinder are connected to the trajectory extraction device, and the signal output end of the trajectory extraction device is connected to the single-chip control system.

[0009] Specifically, the metal bottom plate and the first drive motor and the second drive motor are detachably connected via an electromagnet module, and the electromagnet module is fixedly disposed on the metal bottom plate.

[0010] Preferably, the Y-axis rangefinder and the X-axis rangefinder are both ultrasonic rangefinders.

[0011] The beneficial effects of the utility model are:

[0012] The utility model is a teaching device for a planar linkage mechanism. Compared with the prior art, the utility model has the following technical effects:

[0013] Automated demonstration: A stepper motor is used to drive the planar four-bar linkage to achieve fully automatic demonstration, making the teaching process more convenient and intuitive.

[0014] Automatic data collection and visual analysis: The ultrasonic ranging module automatically collects the trajectory plane coordinates, and the host computer performs visual analysis of the trajectory, including automatic calculation of speed and acceleration, which helps students understand the principles of mechanical motion more deeply.

[0015] Simple fixing method: The base design based on the electromagnet simplifies the fixing and adjustment of the device, making the installation and disassembly of the device more convenient, and improving the teaching efficiency and flexibility.

[0016] Therefore, the planar connecting rod teaching device of the utility model is suitable for the teaching of mechanical courses, and can effectively enhance students' understanding and mastery of mechanical principles, and improve teaching effects and learning motivation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of one side of the utility model;

[0018] Figure 2 It is a structural schematic diagram of another side of the utility model;

[0019] Figure 3This is a schematic diagram of the electromagnet installation structure of the utility model;

[0020] Figure 4 It is a structural principle block diagram of the utility model connected with a host computer system and a single-chip microcomputer control system.

[0021] In the figure: 1-metal base plate, 2-Y-axis reflection plate, 3-X-axis reflection plate, 4-first drive motor, 5-second drive motor, 6-first telescopic adjustment link, 7-second telescopic adjustment link, 8-third telescopic adjustment link, 9-link adjustment locking bolt, 10-trajectory extraction device, 11-Y-axis rangefinder, 12-X-axis rangefinder, 13-electromagnet module, 14-single-chip microcomputer control system, 15-host computer system. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The schematic embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0023] like Figure 1-4 As shown: the utility model includes a connecting rod driving mechanism, a connecting rod assembly, a trajectory extraction assembly, a single-chip control system 14 and a host computer system 15, the driving end of the connecting rod driving mechanism is connected to the connecting rod assembly, the trajectory extraction assembly is arranged on the connecting rod assembly, the signal output end of the trajectory extraction assembly is connected to the single-chip control system 14, the control signal output end of the single-chip control system 14 is connected to the connecting rod driving mechanism, and the data transmission end of the single-chip control system 14 is connected to the host computer system 15.

[0024] Furthermore, the connecting rod drive mechanism includes a metal base plate 1, a first drive motor 4, and a second drive motor 5. The first drive motor 4 and the second drive motor 5 are detachably connected to the metal base plate 1, the driving ends of the first drive motor 4 and the second drive motor 5 are connected to the connecting rod assembly, and the control signal input ends of the first drive motor 4 and the second drive motor 5 are connected to the control signal output end of the single-chip control system 14.

[0025] Further, the connecting rod assembly includes a first telescopic adjustment link 6, a second telescopic adjustment link 7, and a third telescopic adjustment link 8. One end of the first telescopic adjustment link 6 is fixedly connected to the rotating shaft of the first drive motor 4, the other end of the first telescopic adjustment link 6 is rotatably connected to one end of the third telescopic adjustment link 8, the other end of the third telescopic adjustment link 8 is rotatably connected to one end of the second telescopic adjustment link 7, the other end of the second telescopic adjustment link 7 is fixedly connected to the rotating shaft of the second drive motor 5, the telescopic adjustment of the first telescopic adjustment link 6, the second telescopic adjustment link 7, and the third telescopic adjustment link 8 are all fixedly adjusted by a connecting rod adjustment locking bolt 9, and the trajectory extraction assembly is fixedly installed on the third telescopic adjustment link 8.

[0026] Specifically, the trajectory extraction component includes a Y-axis reflection plate 2, an X-axis reflection plate 3, a trajectory extraction device 10, a Y-axis rangefinder 11, and an X-axis rangefinder 12. The Y-axis reflection plate 2 is fixedly set on an edge of the Y-axis of the metal base plate 1, the X-axis reflection plate 3 is fixedly set on an edge of the X-axis of the metal base plate 1, the trajectory extraction device 10 is fixedly set on the middle section of the third telescopic adjustment link 8, the Y-axis rangefinder 11 is set in the Y-axis direction of the trajectory extraction device 10, and the X-axis rangefinder 12 is set in the X-axis direction of the trajectory extraction device 10. The signal output ends of the Y-axis rangefinder 11 and the X-axis rangefinder 12 are connected to the trajectory extraction device 10, and the signal output end of the trajectory extraction device 10 is connected to the single-chip control system 14.

[0027] Specifically, the metal bottom plate 1 and the first drive motor 4 and the second drive motor 5 are detachably connected via an electromagnet module 13 , and the electromagnet module 13 is fixedly disposed on the metal bottom plate 1 .

[0028] Preferably, the Y-axis rangefinder 11 and the X-axis rangefinder 12 are both ultrasonic rangefinders.

[0029] The working principle of the utility model is as follows:

[0030] The planar linkage teaching device of the utility model can clearly display the movement of the planar four-bar mechanism, and the upper computer system 15 can analyze the speed, acceleration and motion trajectory of any position on the planar four-bar mechanism. The electromagnet module 13 is fixed to the metal base plate 1, which is convenient for installation, disassembly and position adjustment. The first drive motor 4 and the second drive motor 5 are connected to the single-chip control system 14, and the start and stop and rotation speed are controlled by the single-chip control system 14. The first telescopic adjustment link 6, the second telescopic adjustment link 7, and the third telescopic adjustment link 8 can all be telescopically changed to change their lengths. After adjusting the required length, they are fixed by the link adjustment locking bolt 9, thereby forming a planar four-bar mechanism with any rod length ratio within a certain range.

[0031] The single-chip control system 14 controls the first drive motor 4 or the second drive motor 5 to rotate, and drives the entire planar connecting rod to move through the connecting shaft between the rods. The single-chip control system 14 reads the measurement values ​​of the Y-axis rangefinder 11 and the X-axis rangefinder 12 at a fixed time interval Δt, and calculates the plane position coordinates (x i ,y i ), and sent to the host computer system 15 through the serial port. The host computer system 15 receives the coordinate data and draws the running track. At the same time, the host computer system 15 draws the running track according to the track point information G = [(x1, y1), (x2, y2) ... (x n ,y n )], the running speed v(v xi ,v yi ) and acceleration a(a xi ,a yi ). The G, v, a curves can be used to intuitively analyze the motion characteristics of the planar linkage mechanism, which is convenient for teaching demonstrations.

[0032] The calculation is as follows:

[0033] v xi =(x i+1 -x i ) / Δt

[0034] v yi =(y i+1 -y i ) / Δt

[0035] a xi =(v x(i+1) -v xi ) / Δt

[0036] a yi =(v y(i+1) -v yi ) / Δt

[0037] The above shows and describes the basic principle and main features of the utility model and the advantages of the invention. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the invention, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A planar linkage mechanism teaching device, characterized in that: The invention comprises a connecting rod driving mechanism, a connecting rod assembly, a trajectory extraction assembly, a single chip microcomputer control system (14) and a host computer system (15), wherein the driving end of the connecting rod driving mechanism is connected to the connecting rod assembly, the trajectory extraction assembly is arranged on the connecting rod assembly, the signal output end of the trajectory extraction assembly is connected to the single chip microcomputer control system (14), the control signal output end of the single chip microcomputer control system (14) is connected to the connecting rod driving mechanism, and the data transmission end of the single chip microcomputer control system (14) is connected to the host computer system (15).

2. The planar linkage mechanism teaching device according to claim 1, characterized in that: The connecting rod driving mechanism comprises a metal base plate (1), a first driving motor (4), and a second driving motor (5); the first driving motor (4) and the second driving motor (5) are detachably connected to the metal base plate (1); the driving ends of the first driving motor (4) and the second driving motor (5) are connected to the connecting rod assembly; and the control signal input ends of the first driving motor (4) and the second driving motor (5) are connected to the control signal output end of the single-chip control system (14).

3. The planar linkage mechanism teaching device according to claim 2, characterized in that: The connecting rod assembly comprises a first telescopic adjustment connecting rod (6), a second telescopic adjustment connecting rod (7), and a third telescopic adjustment connecting rod (8); one end of the first telescopic adjustment connecting rod (6) is fixedly connected to the rotating shaft of the first driving motor (4); the other end of the first telescopic adjustment connecting rod (6) is rotationally connected to one end of the third telescopic adjustment connecting rod (8); the other end of the third telescopic adjustment connecting rod (8) is rotationally connected to one end of the second telescopic adjustment connecting rod (7); the other end of the second telescopic adjustment connecting rod (7) is fixedly connected to the rotating shaft of the second driving motor (5); the telescopic movement of the first telescopic adjustment connecting rod (6), the second telescopic adjustment connecting rod (7), and the third telescopic adjustment connecting rod (8) are all fixedly adjusted by connecting rod adjustment locking bolts (9); and the trajectory extraction assembly is fixedly mounted on the third telescopic adjustment connecting rod (8).

4. The planar linkage mechanism teaching device according to claim 3, characterized in that: The track extraction component comprises a Y-axis reflection plate (2), an X-axis reflection plate (3), a track extraction device (10), a Y-axis distance meter (11), and an X-axis distance meter (12); the Y-axis reflection plate (2) is fixedly arranged on an edge of the Y-axis of the metal bottom plate (1); the X-axis reflection plate (3) is fixedly arranged on an edge of the X-axis of the metal bottom plate (1); the track extraction device (10) is fixedly arranged on the middle section of the third telescopic adjustment link (8); the Y-axis distance meter (11) is arranged in the Y-axis direction of the track extraction device (10); the X-axis distance meter (12) is arranged in the X-axis direction of the track extraction device (10); the signal output ends of the Y-axis distance meter (11) and the X-axis distance meter (12) are connected to the track extraction device (10); and the signal output end of the track extraction device (10) is connected to the single-chip control system (14).

5. The planar linkage mechanism teaching device according to claim 2, characterized in that: The metal base plate (1) and the first drive motor (4) and the second drive motor (5) are detachably connected via an electromagnet module (13), and the electromagnet module (13) is fixedly arranged on the metal base plate (1).

6. The planar linkage mechanism teaching device according to claim 4, characterized in that: The Y-axis distance meter (11) and the X-axis distance meter (12) are both ultrasonic distance meters.

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