CN204472337U - Automatic dust-free blackboard eraser - Google Patents

Abstract

The automatic dust-free blackboard eraser consists of a motor 1, a coupling 2, the first shaft 3, the first synchronous pulley 4, the driving gear 5, the driven gear 6, the frame 7, the lead screw 8, the upper slide 9, the first A synchronous belt 10, a second synchronous pulley 11, a second shaft 12, a second synchronous belt 13, a third synchronous pulley 14, a third shaft 15, a third synchronous belt 16, a fourth synchronous pulley 17, a fourth Axle 18, glide path 19, dust box 20, guide slideway 21, guide slider 22, connecting rod 23, driving lever 24, wiping plate 25, leading screw support 26, blackboard 27, body of wall 28 forms. The main movement and the wiping movement are powered by the same motor, with dust collection function, and the movement control is realized by a remote controller, which is convenient and flexible to use.

Description

Automatic dust-free blackboard eraser

technical field

The invention relates to a blackboard eraser, in particular to an automatic dust-free blackboard eraser.

Background technique

Currently used blackboard erasers are roughly divided into two types: common erasers and improved erasers. The improved eraser is generally divided into two types: small and large. The small one is a manual dust-free blackboard eraser, and the large one is an automatic dust-free blackboard eraser. As we all know, ordinary blackboard erasers are not satisfactory in terms of wiping cleanliness and dust absorption. Although the improved small blackboard eraser has improved in wiping cleanliness, it is still lacking in dust absorption due to volume limitations, and there may be places that cannot be wiped. And though existing large-scale blackboard erasers are all unsatisfactory in terms of wiping cleanliness and dust absorption, problems such as high cost and difficult maintenance due to high technological content are seldom used by people.

Contents of the invention

The invention aims at inventing an automatic dust-free blackboard eraser for cleaning blackboards in classrooms. The purpose of the invention is to reduce dust pollution in classrooms, improve air quality in classrooms, and reduce the workload of teachers and students.

The automatic dust-free blackboard eraser of the present invention comprises: motor 1, shaft coupling 2, first shaft 3, first synchronous pulley 4, driving gear 5, driven gear 6, frame 7, lead screw 8, upper slideway 9. The first synchronous belt 10, the second synchronous pulley 11, the second shaft 12, the second synchronous belt 13, the third synchronous pulley 14, the third shaft 15, the third synchronous belt 16, the fourth synchronous pulley 17 , the fourth shaft 18, glideway 19, dust box 20, guide slideway 21, guide slider 22, connecting rod 23, driving lever 24, wiping plate 25, leading screw support 26, blackboard 27, body of wall 28.

Frame 7 is the basic part of whole device, and frame 7 is fixed on the body of wall 28, is in the front of blackboard 27. The motor 1 is installed on the right side of the frame 7 upper end, and the output shaft of the motor 1 is towards the left. The right end and the left end of the coupling 2 are respectively connected to the output shaft of the motor 1 and the right end of the first shaft 3 . The left end of first axle 3 is fixed on the frame 7 by bearing. On the first shaft 3, a driving gear 5 and a first synchronous pulley 4 are sequentially installed from left to right. Driven gear 6 is installed on the frame 7 by bearing, is positioned at the rear of driving gear 5, and forms gear transmission with driving gear 5. Driven gear 6 is processed with internal thread, constitutes a gear nut, and forms screw drive with leading screw 8, and leading screw 8 is installed on the leading screw support 26, and leading screw support 26 is installed on the top of frame 7. The second shaft 12 is installed on the frame 7 through bearings and is located directly below the first shaft 3 . The second synchronous pulley 11 is installed on the second shaft 12 and forms a synchronous belt transmission with the first synchronous belt 10 and the first synchronous pulley 4 . The third shaft 15 is installed on the frame 7 and is located directly below the second shaft 12 . The third synchronous pulley 14 is installed on the third shaft 15 and forms a synchronous belt transmission with the second synchronous belt 13 and the second synchronous pulley 11 . The fourth shaft 18 is installed on the frame 7 and is located directly below the third shaft 15 . The fourth synchronous pulley 17 is installed on the fourth shaft 18 and forms a synchronous belt transmission with the third synchronous belt 16 and the third synchronous pulley 14 . Guide slideway 21 is installed on frame 7 right end surfaces, and guide slide block 22 is fixed on wiping plate 25 left end surfaces, is installed on guide slideway 21. One end of the connecting rod 23 is connected to the second shaft 12, and the other end is equipped with a driving rod 24, and the driving rod 24 moves the eraser 25 to move up and down along the guide slideway 21. Guide slideway 21, guide slider 22, connecting rod 23, driving lever 24, wiping plate 25 form wiping part, are installed on the second axle 12, the third axle 15, the fourth axle 18 respectively. Upper slideway 9 and glideway 19 are installed on the upper limit and the lower limit of blackboard 27 respectively. The dust box 20 is installed on the lower end of the frame 7, directly below the wiping part.

The automatic dust-free blackboard eraser of the present invention has two motion forms, which are respectively the overall motion of the frame (main motion) and the up and down motion of the eraser itself (wiping motion). The two movements are powered by the same motor, the control system is controlled by 51 single-chip microcomputer, and the movement control is realized through a remote controller.

The present invention realizes two kinds of movement forms by one motor by using the gear nut to rotate on the lead screw to drive the movement of the frame, and a spring is installed between the wiper frame and the wiper board to avoid the gap between the blackboard surface and the brush wear , Improve the quality of wiping, save hair wipes, and install a dust-proof shell and dust collection box on the rack, which can slow down the pollution of dust to the classroom environment.

Description of drawings

Fig. 1 is the general structural diagram of automatic dust-free blackboard eraser of the present invention;

Fig. 2 is a structural diagram of the main movement part of the automatic dust-free blackboard eraser of the present invention;

Fig. 3 is the schematic diagram that the main movement of automatic dust-free blackboard eraser of the present invention produces;

Fig. 4 is the schematic diagram that the automatic dust-free blackboard eraser wiping motion of the present invention produces;

Fig. 5 is a schematic diagram of the automatic dust-free blackboard eraser control circuit of the present invention.

Detailed ways

The overall structure of the automatic dust-free blackboard eraser of the present invention is shown in Figure 1, comprising: motor 1, shaft coupling 2, first shaft 3, first synchronous pulley 4, driving gear 5, driven gear 6, frame 7 , lead screw 8, upper slideway 9, first synchronous belt 10, second synchronous pulley 11, second shaft 12, second synchronous belt 13, third synchronous belt pulley 14, third shaft 15, third synchronous belt 16. The fourth synchronous pulley 17, the fourth shaft 18, the glideway 19, the dust box 20, the guide slideway 21, the guide slider 22, the connecting rod 23, the driving rod 24, the wiping plate 25, the screw bracket 26, the blackboard 27. Body of wall 28.

Frame 7 is the basic part of whole device, and frame 7 is fixed on the body of wall 28, is in the front of blackboard 27. The motor 1 is installed on the right side of the frame 7 upper end, and the output shaft of the motor 1 is towards the left. The right end and the left end of the coupling 2 are respectively connected to the output shaft of the motor 1 and the right end of the first shaft 3 . The left end of first axle 3 is fixed on the frame 7 by bearing. On the first shaft 3, a driving gear 5 and a first synchronous pulley 4 are sequentially installed from left to right. Driven gear 6 is installed on the frame 7 by bearing, is positioned at the rear of driving gear 5, and forms gear transmission with driving gear 5. Driven gear 6 is processed with internal thread, constitutes a gear nut, and forms screw drive with leading screw 8, and leading screw 8 is installed on the leading screw support 26, and leading screw support 26 is installed on the top of frame 7. The second shaft 12 is installed on the frame 7 through bearings and is located directly below the first shaft 3 . The second synchronous pulley 11 is installed on the second shaft 12 and forms a synchronous belt transmission with the first synchronous belt 10 and the first synchronous pulley 4 . The third shaft 15 is installed on the frame 7 and is located directly below the second shaft 12 . The third synchronous pulley 14 is installed on the third shaft 15 and forms a synchronous belt transmission with the second synchronous belt 13 and the second synchronous pulley 11 . The fourth shaft 18 is installed on the frame 7 and is located directly below the third shaft 15 . The fourth synchronous pulley 17 is installed on the fourth shaft 18 and forms a synchronous belt transmission with the third synchronous belt 16 and the third synchronous pulley 14 . Guide slideway 21 is installed on frame 7 right end surfaces, and guide slide block 22 is fixed on wiping plate 25 left end surfaces, is installed on guide slideway 21. One end of the connecting rod 23 is connected to the second shaft 12, and the other end is equipped with a driving rod 24, and the driving rod 24 moves the eraser 25 to move up and down along the guide slideway 21. Guide slideway 21, guide slider 22, connecting rod 23, driving lever 24, wiping plate 25 form wiping part, are installed on the second axle 12, the third axle 15, the fourth axle 18 respectively. Upper slideway 9 and glideway 19 are installed on the upper limit and the lower limit of blackboard 27 respectively. Dust box 20 is installed in the lower end of frame 7, is positioned at wiping part just below.

The automatic dust-free blackboard eraser of the present invention has two motion forms, which are respectively the overall motion of the frame (main motion) and the up and down motion of the eraser itself (wiping motion). The two movements are powered by the same motor, the control system is controlled by 51 single-chip microcomputer, and the movement control is realized through a remote controller.

The structure of the main moving part of the automatic dust-free blackboard eraser of the present invention is shown in Figure 2, this part includes: motor 1, shaft coupling 2, first shaft 3, first synchronous pulley 4, driving gear 5, driven gear 6, frame 7, lead screw 8, upper slideway 9, lead screw support 26, blackboard 27, body of wall 28. The function of the main movement is to drive the entire frame to move from left to right or from right to left. The principle of the main movement is shown in Figure 3. The output unit of this part is the motor 1, and the output power of the motor 1 is controlled by the coupling 2 is transmitted to the first shaft 3, the first shaft 3 drives the driving gear 5 to rotate, and the driving gear 5 drives the driven gear 6 to rotate. The driven gear 6 and the leading screw 8 form a helical transmission, and the driven gear 6 is installed on the frame 7 and becomes one with the frame 7, so that the driven gear 6 rotates to drive the frame 7 to move.

The wiping mechanism of the automatic dust-free blackboard eraser of the present invention is shown in Figure 1, and this part comprises: motor 1, coupling 2, first shaft 3, first synchronous pulley 4, driving gear 5, driven gear 6, Frame 7, first synchronous belt 10, second synchronous pulley 11, second shaft 12, second synchronous belt 13, third synchronous pulley 14, third shaft 15, third synchronous belt 16, fourth synchronous belt Wheel 17, fourth axle 18, guide slideway 21, guide slide block 22, connecting rod 23, driving lever 24, wiping plate 25. The wiping mechanism is used to complete the wiping work on the blackboard 7. The principle of the wiping movement is shown in Figure 4. The power comes from the motor 1, which is transmitted to the first shaft 3 by the coupling 2, and the first shaft 3 drives the first synchronous belt. Wheel 4 turns. The first synchronous pulley 4 drives the second synchronous pulley 11 below to rotate through the first synchronous belt 10, and the second synchronous pulley 11 drives the third synchronous pulley 14 to rotate through the second synchronous belt 13, and the third synchronous pulley 14 Drive the fourth synchronous pulley 17 to rotate by the 3rd synchronous belt 16, wherein three synchronous pulleys are installed on the corresponding axle by key respectively, synchronous pulley rotates and drives corresponding axle to rotate, finishes the transmission of wiping mechanism. Install the connecting rod 23 and the driving rod 24 respectively on the second shaft 12, the third shaft 15 and the fourth shaft 18 to form three sets of cam mechanisms (as shown in Figure 4). Cleaning of blackboard 7.

The automatic dust-free blackboard eraser of the present invention uses 51 single-chip microcomputers as the core of the control system, and the principle of the control circuit is as shown in Figure 5. The motor 1 is a direct current motor, which can realize overall cleaning, half-time cleaning and inching cleaning to the blackboard by controlling the rotation, stop, forward and reverse of the motor. Switch 1 forward jogging, switch 2 reverse jogging, switch 3 full wiping, switch 4 half wiping. The 220V AC voltage is connected to the transformer, and the voltage (10~20V DC) stepped down by the transformer is connected to the motor drive. The P0 and P1 terminals of the motor drive are respectively connected to the P1^1 and P1^2 of the 51 single-chip microcomputer, and the P2 and P3 terminals of the motor drive are respectively connected to the positive pole and the negative pole of the motor 1. The D0, D1, D2, and D3 interfaces of the infrared sensor are respectively connected to the P3^0, P3^1, P3^2, and P3^3 of the 51 single-chip microcomputer. Switch 1, switch 2, switch 3, and switch 4 are respectively connected to P0^0, P0^1, P0^2, and P0^3 of the 51 single-chip microcomputer.

The automatic dust-free blackboard eraser of the present invention can respectively realize forward jogging, reverse jogging, whole-process wiping and Wipe halfway, easy and convenient to operate.

Claims (1)

1. Automatic dust-free blackboard eraser, including: motor (1), coupling (2), first shaft (3), first synchronous pulley (4), driving gear (5), driven gear (6) , frame (7), lead screw (8), upper slideway (9), first timing belt (10), second timing pulley (11), second shaft (12), second timing belt (13 ), third synchronous pulley (14), third shaft (15), third synchronous belt (16), fourth synchronous pulley (17), fourth shaft (18), glide path (19), dust box (20), guide slideway (21), guide slider (22), connecting rod (23), lever (24), wiper plate (25), lead screw bracket (26), blackboard (27), wall (28), characterized in that: the frame (7) is the basic part of the whole device, the frame (7) is fixed on the wall (28), in front of the blackboard (27), and the motor (1) is installed on On the right side of the upper end of the frame (7), the output shaft of the motor (1) faces left, and the right and left ends of the coupling (2) are respectively connected to the output shaft of the motor (1) and the right end of the first shaft (3). The left end of the shaft (3) is fixed on the frame (7) through a bearing, and the driving gear (5) and the first synchronous pulley (4) are installed on the first shaft (3) from left to right, and the driven gear (6) It is installed on the frame (7) through bearings, located directly behind the driving gear (5), and forms a gear transmission with the driving gear (5), and the driven gear (6) is processed with internal threads to form a gear nut. The lead screw (8) forms a screw transmission, the lead screw (8) is installed on the lead screw support (26), the lead screw support (26) is installed on the upper part of the frame (7), and the second shaft (12) is installed on the On the frame (7), located directly below the first shaft (3), the second synchronous pulley (11) is installed on the second shaft (12), and is connected with the first synchronous belt (10) and the first synchronous belt The pulley (4) forms a synchronous belt transmission, the third shaft (15) is installed on the frame (7), and is located directly below the second shaft (12), and the third synchronous pulley (14) is installed on the third shaft (15 ), and form a synchronous belt transmission with the second synchronous belt (13) and the second synchronous pulley (11), the fourth shaft (18) is installed on the frame (7), and is located on the positive side of the third shaft (15) Below, the fourth synchronous pulley (17) is installed on the fourth shaft (18), and forms a synchronous belt drive with the third synchronous belt (16) and the third synchronous pulley (14), and the guide slideway (21) is installed on On the right end face of the frame (7), the guide slider (22) is fixed on the left end face of the wiping plate (25), installed on the guide slideway (21), and one end of the connecting rod (23) is connected to the second shaft (12), The other end is equipped with driving lever (24), and driving lever (24) moves the eraser (25) up and down along the guide slideway (21), guide slideway (21), guide slide block (22), connecting rod (23), Driving rod (24), wiping plate (25) form wiping part, are installed on the second axle (12), the third axle (15), the fourth axle (18) respectively, upper slideway (9) and slideway ( 19) respectively installed in On the top and bottom of the blackboard (27), the dust box (20) is installed on the lower end of the frame (7), and is positioned directly below the wiping part.