Combined belt transmission teaching device

Abstract

The invention discloses a combined type belt transmission teaching device, and belongs to the technical field of mechanical engineering, the combined type belt transmission teaching device comprises a teaching box, the teaching box is internally provided with a manual adjusting mechanism, the front end of the manual adjusting mechanism is provided with a gear spacing adjusting mechanism, and the gear spacing adjusting mechanism is provided with a gear spacing adjusting mechanism. A transmission belt is installed in the gear spacing adjusting mechanism, a display board is fixedly connected to the front end of the teaching box, a limiting groove is formed in the front end of the display board, and a tension display mechanism is arranged at the position, close to the transmission belt, of the front end of the display board; the manual adjusting mechanism is designed to drive the gear spacing adjusting mechanism to move and provide power for the gear spacing adjusting mechanism, the adjusting mode can be used for adapting to transmission belts of different sizes, and influences, such as influences on parameters such as transmission ratio and tensile force, of gear spacing changes on belt transmission are displayed in teaching demonstration.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical engineering, and in particular relates to a combined belt transmission teaching device. Background Art

[0002] In the field of mechanical transmission, belt drive, as a widely used transmission method, has many advantages such as simple structure, smooth transmission, buffering and vibration absorption, and long-distance transmission. Therefore, it occupies an important position in many industries such as industrial production, transportation, and agricultural machinery. The continuous development and evolution of belt drive technology has provided solid support for the efficient operation of various industries. With the increasing requirements of modern manufacturing industry for talents' mechanical knowledge literacy, the traditional theoretical teaching model can no longer meet the students' needs for in-depth understanding and mastery of belt drive knowledge.

[0003] Early belt drive teaching tools were mostly simple models with a single function, which could only show the most basic structure of the belt drive and could not allow students to fully understand the performance changes of the belt drive under different working conditions. For example, traditional models could not demonstrate the working state of the belt drive when there were different pulley spacings and different belt types. In addition, there was a lack of effective measurement and display methods for key parameters in the belt drive, such as the tension of the transmission belt. Students could not intuitively perceive the impact of changes in these parameters on the belt drive system. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a combined belt drive teaching device.

[0005] The technical solution adopted to solve the above technical problems is: a combined belt-driven teaching device, comprising a teaching box, a manual adjustment mechanism is arranged inside the teaching box, a gear spacing adjustment mechanism is arranged at the front end of the manual adjustment mechanism, a transmission belt is installed inside the gear spacing adjustment mechanism, a display board is fixedly connected to the front end of the teaching box, a limiting groove is arranged at the front end of the display board, and a tension display mechanism is arranged at the front end of the display board near the transmission belt.

[0006] Furthermore, the manual adjustment mechanism includes a handwheel rotatably connected to one side of the teaching box, a threaded rod is fixedly connected to the inner side of the handwheel, a mounting block is slidably connected to the outer wall of the threaded rod, a driving motor is installed inside the mounting block, and a limiting slide groove is provided at the rear end of the display board.

[0007] Through the above technical solution, when the teaching staff or students manually turn the handwheel, the threaded rod will rotate with the handwheel, because the threaded rod is a rotational motion, and the mounting block cannot rotate with the threaded rod due to the limitation of the limiting slide groove, and can only slide along the axial direction of the threaded rod. When the threaded rod rotates, the mounting block will produce a linear displacement on the threaded rod. If the threaded rod is a right-hand thread, when the handwheel is turned clockwise, the mounting block will move in the specified direction, and when the handwheel is turned counterclockwise, the mounting block will move in the opposite direction. As the mounting block moves driven by the threaded rod, the position of the drive motor will also change accordingly. In the process of the mounting block moving along the axial direction of the threaded rod, the corresponding part of the mounting block will be embedded in the limiting slide groove. The limiting slide groove limits the freedom of the mounting block so that it can only move along the direction of the slide groove without offset or rotation.

[0008] Furthermore, the front end of the mounting block slides against the inner wall of the limiting sliding groove by the bottom outer wall.

[0009] Through the above technical solution, this fitting sliding method can greatly enhance the stability of the installation block movement. Since the installation block is constrained by the limiting slide groove during movement, its movement trajectory is fixed and smooth. The stable motor position adjustment can ensure the accuracy and repeatability of the teaching data.

[0010] Furthermore, the gear spacing adjustment mechanism includes a driving gear plate installed on the output end of the driving motor, the front end of the driving gear plate is rotatably connected to the first connecting bar, the front end of the first connecting bar is installed with a driving wheel, the other end of the first connecting bar is rotatably connected to the connecting gear plate and the second connecting bar respectively, the rear end of the other end of the second connecting bar is rotatably connected to the driven gear plate, and the front end of the other end of the second connecting bar is rotatably connected to the driven wheel.

[0011] Through the above technical solution, when the driving motor is started, the driving gear plate will rotate accordingly. When the driving gear plate rotates, it will drive the first connecting bar to perform circular motion with the connection point as the center. Since a driving wheel is installed at the front end of the first connecting bar, this movement will change the position of the driving wheel. The driving wheel will move synchronously inside the limiting groove with the movement of the first connecting bar, changing the relative position between the driving wheel and the driven wheel. When the first connecting bar moves, the movement will be transmitted through the connecting gear plate and the second connecting bar. The connecting gear plate rotates and displaces accordingly under the action of the driving gear plate and the first connecting bar. At the same time, the second connecting bar will also perform synchronous circular motion with their connection point as the center under the drive of the first connecting bar. The driven gear plate and the driven wheel are fixed relative to the driving wheel and the driving gear plate. They will not be synchronously displaced due to the movement of the first connecting bar and the second connecting bar, but will be synchronously rotated due to the connection of the connecting gear plate. This adjustment method can be used to adapt to transmission belts of different sizes, and to show the influence of gear spacing changes on belt transmission in teaching demonstrations, such as the influence on parameters such as transmission ratio and tension.

[0012] Furthermore, the connecting gear plate is meshed with the driving gear plate and the driven gear plate respectively.

[0013] Through the above technical solution, when the driving motor drives the driving gear plate to rotate, since the connecting gear plate is respectively meshed with the driving gear plate and the driven gear plate, the rotational movement of the driving gear plate can be transmitted to the driven gear plate through the connecting gear plate. This meshing transmission method can ensure that the movement of the driving wheel and the driven wheel is synchronized in time.

[0014] Furthermore, the transmission belt is installed between the driving wheel and the driven wheel.

[0015] Through the above technical solution, the transmission belt is installed between the driving wheel and the driven wheel, which can effectively transmit the power of the driving wheel to the driven wheel. When the driving wheel rotates under the action of the power source, the transmission belt is driven to move through the friction between the transmission belt and the driving wheel.

[0016] Furthermore, the tension display mechanism includes a tension sensor fixedly connected to the front end of the display board, an elastic cantilever beam is installed at the bottom of the tension sensor, a metal strain gauge is fixedly connected to the bottom of the elastic cantilever beam, a wire is fixedly connected to one side of the tension sensor, the other end of the wire is fixedly connected to an installation box, the front end of the installation box is fixedly connected to a display screen, and an information processing component is installed inside the installation box.

[0017] Through the above technical solution, when the transmission belt generates tension, the tension will act on the metal strain gauge, and the metal strain gauge will undergo a slight deformation due to the tension, and its resistance value will change. The wire is used to transmit the resistance change signal of the metal strain gauge to the installation box, and the information processing component inside the installation box receives the signal from the wire. Since the metal strain gauge outputs a resistance change signal, the information processing component must first convert the resistance change signal into a voltage signal and then amplify and filter the voltage signal. After these processes, the information processing component converts the processed signal into a digital signal that can represent the tension. The information processing component sends the processed digital signal to the display screen. The display screen displays the tension in an intuitive numerical form based on the received digital signal. In this way, in the belt transmission teaching device, the instructor can directly read the real-time tension value of the transmission belt from the display screen, which is convenient for observing the changes in tension, thereby better understanding the influence of tension in the belt transmission process.

[0018] Furthermore, the bottom of the metal strain gauge contacts and fits the outer wall of the transmission belt.

[0019] Through the above technical solution, when the transmission belt produces tension changes during operation, the metal strain gauge is in direct contact and fit with the outer wall of the transmission belt, which can most directly sense the change in tension and accurately transmit the tension information to the subsequent measurement system.

[0020] The beneficial effects of the present invention are as follows: (1) The present invention drives the gear spacing adjustment mechanism to move and provide power for the gear spacing adjustment mechanism by designing a manual adjustment mechanism. When it is necessary to adjust the distance between the driving wheel and the driven wheel, it is only necessary to turn the hand wheel and drive the driving motor to move through the threaded rod, so as to drive the driving wheel to move synchronously. By connecting the gear plate, it is ensured that the rotation of the driving gear plate can drive the driven gear plate to rotate synchronously, thereby driving the rotation of the driven wheel without affecting the operation of the transmission belt. This adjustment method can be used to adapt to transmission belts of different sizes, and to demonstrate the influence of gear spacing changes on belt transmission in teaching demonstrations, such as the influence on parameters such as transmission ratio and tension force; (2) The present invention designs a tension display mechanism. Through the bonding of the metal strain gauge and the transmission belt, the metal strain gauge will monitor the tension change of the transmission belt in real time. After the tension change occurs, it will be displayed in an intuitive numerical form through the display screen. In this way, in the belt transmission teaching device, the instructor can directly read the real-time tension value of the transmission belt from the display screen, which is convenient for observing the tension change, so as to better understand the influence of tension on the belt transmission process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2is a front view of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the teaching box of the present invention;

[0024] Figure 4 is a schematic diagram of the manual adjustment mechanism of the present invention;

[0025] Figure 5 is a schematic diagram of the gear spacing adjustment mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the tension display mechanism of the present invention.

[0027] Figure numerals: 1. teaching box; 2. manual adjustment mechanism; 201. hand wheel; 202. threaded rod; 203. mounting block; 204. driving motor; 205. limiting slide groove; 3. gear spacing adjustment mechanism; 301. driving gear plate; 302. first connecting strip; 303. driving wheel; 304. connecting gear plate; 305. second connecting strip; 306. driven gear plate; 307. driven wheel; 4. transmission belt; 5. display board; 6. limiting groove; 7. tension display mechanism; 701. tension sensor; 702. elastic cantilever beam; 703. metal strain gauge; 704. wire; 705. mounting box; 706. display screen; 707. information processing component. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] like Figure 1 - Figure 4As shown, a combined belt transmission teaching device of the present embodiment includes a teaching box 1, and a manual adjustment mechanism 2 is arranged inside the teaching box 1. The manual adjustment mechanism 2 includes a hand wheel 201 rotatably connected to one side of the teaching box 1, and a threaded rod 202 is fixedly connected to the inner side of the hand wheel 201, and a mounting block 203 is slidably connected to the outer wall of the threaded rod 202, and a driving motor 204 is installed inside the mounting block 203. A limited sliding groove 205 is provided at the rear end of the display board 5, and the front end of the mounting block 203 slides against the inner wall of the limited sliding groove 205 by the bottom outer wall. This sliding fit can greatly enhance the stability of the movement of the mounting block 203. Since the mounting block 203 is constrained by the limited sliding groove 205 during the movement, its movement trajectory is fixed and smooth. Stable motor position adjustment can ensure the accuracy and repeatability of the teaching data. When the teaching staff or students manually turn the hand wheel 201, the threaded rod 202 will move with the hand wheel 201 rotates together because the threaded rod 202 is rotating, and the mounting block 203 cannot rotate with the threaded rod 202 due to the limitation of the limiting slide groove 205, and can only slide along the axial direction of the threaded rod 202. When the threaded rod 202 rotates, the mounting block 203 will produce a linear displacement on the threaded rod 202. If the threaded rod 202 is a right-hand thread, when the hand wheel 201 is turned clockwise, the mounting block 203 will move in the specified direction, and when the hand wheel 201 is turned counterclockwise, the mounting block 203 will move in the opposite direction. As the mounting block 203 moves driven by the threaded rod 202, the position of the drive motor 204 will also change accordingly. During the process of the mounting block 203 moving along the axial direction of the threaded rod 202, the corresponding part of the mounting block 203 will be embedded in the limiting slide groove 205. The limiting slide groove 205 limits the freedom of the mounting block 203, so that it can only move along the direction of the slide groove without offset or rotation.

[0030] like Figure 5As shown, the front end of the manual adjustment mechanism 2 is provided with a gear spacing adjustment mechanism 3, and the gear spacing adjustment mechanism 3 includes a driving gear plate 301 installed at the output end of the driving motor 204, the front end of the driving gear plate 301 is rotatably connected with a first connecting bar 302, the front end of the first connecting bar 302 is installed with a driving wheel 303, and the other end of the first connecting bar 302 is rotatably connected with a connecting gear plate 304 and a second connecting bar 305, respectively, and the connecting gear plate 304 is respectively meshed with the driving gear plate 301 and the driven gear plate 306. When the driving motor 204 drives the driving gear plate 301 to rotate, since the connecting gear plate 304 is respectively meshed with the driving gear plate 301 and the driven gear plate 306, the rotation of the driving gear plate 301 can be achieved through the connecting gear plate 304. The gear plate 304 is transmitted to the driven gear plate 306. This meshing transmission method can ensure that the movement of the driving wheel 303 and the driven wheel 307 is synchronized in time. The rear end of the other end of the second connecting bar 305 is rotatably connected to the driven gear plate 306, and the front end of the other end of the second connecting bar 305 is rotatably connected to the driven wheel 307. The transmission belt 4 is installed between the driving wheel 303 and the driven wheel 307. The transmission belt 4 is installed between the driving wheel 303 and the driven wheel 307, and can effectively transmit the power of the driving wheel 303 to the driven wheel 307. When the driving wheel 303 rotates under the action of the power source, the transmission belt 4 is driven to move through the friction between the transmission belt 4 and the driving wheel 303, and the transmission belt 4 is installed inside the gear spacing adjustment mechanism 3.

[0031] like Figure 5 As shown, when the driving motor 204 is started, the driving gear plate 301 will rotate accordingly. When the driving gear plate 301 rotates, it will drive the first connecting bar 302 to make a circular motion with the connection point as the center. Since a driving wheel 303 is installed at the front end of the first connecting bar 302, this movement will change the position of the driving wheel 303. The driving wheel 303 will move synchronously inside the limiting groove 6 with the movement of the first connecting bar 302, changing the relative position between the driving wheel 303 and the driven wheel 307. When the first connecting bar 302 moves, the movement will be transmitted through the connecting gear plate 304 and the second connecting bar 305. The connecting gear plate 304 is connected to the driving gear plate 301 and the first connecting bar 305. A connecting bar 302 generates rotation and corresponding displacement, and at the same time, the second connecting bar 305 also performs synchronous circular motion with their connection point as the center under the drive of the first connecting bar 302, and the driven gear plate 306 and the driven wheel 307 are fixed relative to the driving wheel 303 and the driving gear plate 301. They will not perform synchronous displacement due to the movement of the first connecting bar 302 and the second connecting bar 305, but will perform synchronous rotation due to the connection of the connecting gear plate 304. This adjustment method can be used to adapt to transmission belts 4 of different sizes, and to demonstrate the influence of changes in gear spacing on belt transmission in teaching demonstrations, such as the influence on parameters such as transmission ratio and tension force.

[0032] like Figure 1 - Figure 3 As shown, a display board 5 is fixedly connected to the front end of the teaching box 1 , and a limiting groove 6 is provided at the front end of the display board 5 .

[0033] like Figure 6 As shown, a tension display mechanism 7 is provided at the front end of the display board 5 near the transmission belt 4. The tension display mechanism 7 includes a tension sensor 701 fixedly connected to the front end of the display board 5. An elastic cantilever beam 702 is installed at the bottom of the tension sensor 701. A metal strain gauge 703 is fixedly connected to the bottom of the elastic cantilever beam 702. The bottom of the metal strain gauge 703 contacts and fits the outer wall of the transmission belt 4. When the transmission belt 4 generates tension changes during operation, the metal strain gauge 703 directly contacts and fits the outer wall of the transmission belt 4, which can most directly sense the tension change and accurately transmit the tension information to the subsequent measurement system. A wire 704 is fixedly connected to one side of the tension sensor 701. The other end of the wire 704 is fixedly connected to an installation box 705. A display screen 706 is fixedly connected to the front end of the installation box 705. An information processing component 707 is installed inside the installation box 705. When the transmission belt 4 generates tension, the tension will act on the metal strain gauge 703. The metal strain gauge 703 will be affected by the tension. The metal strain gauge 703 undergoes a slight deformation due to the tension, and its resistance value will change. The wire 704 is used to transmit the resistance change signal of the metal strain gauge 703 to the installation box 705. The information processing component 707 inside the installation box 705 receives the signal from the wire 704. Since the metal strain gauge 703 outputs a resistance change signal, the information processing component 707 must first convert the resistance change signal into a voltage signal and then amplify and filter the voltage signal. After these processes, the information processing component 707 converts the processed signal into a digital signal that can represent the tension. The information processing component 707 sends the processed digital signal to the display screen 706. The display screen 706 displays the tension in an intuitive numerical form based on the received digital signal. In this way, in the belt transmission teaching device, the instructor can directly read the real-time tension value of the transmission belt 4 from the display screen 706, which is convenient for observing the changes in tension, thereby better understanding the influence of tension in the belt transmission process.

[0034] The working principle of this embodiment is as follows. When the teacher installs the transmission belt 4 to be used for teaching between the driving wheel 303 and the driven wheel 307, and fits the metal strain gauge 703 of the tension display mechanism 7 on the transmission belt 4, the device can be started to carry out transmission teaching. When it is necessary to teach students the influence of the change of gear spacing on the belt transmission, such as the influence on the transmission ratio, tension force and other parameters, the hand wheel 201 can be turned according to actual needs, and the threaded rod 202 can be driven to rotate by the hand wheel 201. The mounting block 203 will produce a linear displacement on the threaded rod 202. Because the driving gear plate 301 is connected to the driving motor 204 inside the mounting block 203, when the mounting block 203 and its internal When the position of the driving motor 204 is displaced, the driving gear plate 301 will also move synchronously inside the limiting groove 6. When the driving gear plate 301 is displaced, the connecting gear plate 304 rotates and displaces accordingly under the action of the driving gear plate 301 and the first connecting bar 302. At the same time, the second connecting bar 305 will also perform a synchronous circular motion with their connection point as the center under the drive of the first connecting bar 302. The driven gear plate 306 and the driven wheel 307 are fixed relative to the driving wheel 303 and the driving gear plate 301. They will not be displaced synchronously due to the movement of the first connecting bar 302 and the second connecting bar 305, but will rotate synchronously due to the connection of the connecting gear plate 304.

[0035] When the position between the driving wheel 303 and the driven wheel 307 is adjusted, the tension of the transmission belt 4 between the driving wheel 303 and the driven wheel 307 will also change, and the tension will act on the metal strain gauge 703. The wire 704 is used to transmit the resistance change signal of the metal strain gauge 703 to the installation box 705. The information processing component 707 inside the installation box 705 receives the signal from the wire 704 for processing. The information processing component 707 sends the processed digital signal to the display screen 706. The display screen 706 displays the tension in an intuitive numerical form based on the received digital signal. In this way, in the belt transmission teaching device, the instructor can directly read the real-time tension value of the transmission belt 4 from the display screen 706, which is convenient for observing the change of tension and thus better understanding the influence of tension on the belt transmission process.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A combined belt drive teaching device, comprising a teaching box (1), characterized in that: The teaching box (1) is provided with a manual adjustment mechanism (2) inside, a gear spacing adjustment mechanism (3) is provided at the front end of the manual adjustment mechanism (2), a transmission belt (4) is installed inside the gear spacing adjustment mechanism (3), a display board (5) is fixedly connected to the front end of the teaching box (1), a limiting groove (6) is provided at the front end of the display board (5), and a tension display mechanism (7) is provided at the front end of the display board (5) near the transmission belt (4).

2. The combined belt drive teaching device according to claim 1, characterized in that: The manual adjustment mechanism (2) comprises a hand wheel (201) rotatably connected to one side of the teaching box (1); a threaded rod (202) is fixedly connected to the inner side of the hand wheel (201); a mounting block (203) is slidably connected to the outer wall of the threaded rod (202); a driving motor (204) is installed inside the mounting block (203); and a limiting sliding groove (205) is provided at the rear end of the display board (5).

3. The combined belt drive teaching device according to claim 2, characterized in that: The front end of the mounting block (203) slides against the inner wall of the limiting sliding groove (205) by the outer wall of the bottom.

4. The combined belt drive teaching device according to claim 2, characterized in that: The gear spacing adjustment mechanism (3) comprises a driving gear plate (301) mounted on the output end of a driving motor (204); the front end of the driving gear plate (301) is rotatably connected to a first connecting bar (302); the front end of the first connecting bar (302) is mounted with a driving wheel (303); the other end of the first connecting bar (302) is rotatably connected to a connecting gear plate (304) and a second connecting bar (305), respectively; the rear end of the other end of the second connecting bar (305) is rotatably connected to a driven gear plate (306); and the front end of the other end of the second connecting bar (305) is rotatably connected to a driven wheel (307).

5. The combined belt drive teaching device according to claim 4, characterized in that: The connecting gear plate (304) is meshed with the driving gear plate (301) and the driven gear plate (306) respectively.

6. The combined belt drive teaching device according to claim 4, characterized in that: The transmission belt (4) is installed between the driving wheel (303) and the driven wheel (307).

7. The combined belt drive teaching device according to claim 1, characterized in that: The tension display mechanism (7) comprises a tension sensor (701) fixedly connected to the front end of the display board (5); an elastic cantilever beam (702) is installed at the bottom of the tension sensor (701); a metal strain gauge (703) is fixedly connected to the bottom of the elastic cantilever beam (702); a wire (704) is fixedly connected to one side of the tension sensor (701); the other end of the wire (704) is fixedly connected to an installation box (705); a display screen (706) is fixedly connected to the front end of the installation box (705); and an information processing component (707) is installed inside the installation box (705).

8. The combined belt drive teaching device according to claim 7, characterized in that: The bottom of the metal strain gauge (703) contacts and fits the outer wall of the transmission belt (4).

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