CN106976341B - A kind of mechanical dust-absorbing blackboard brush - Google Patents

Abstract

The invention discloses a mechanical dust-absorbing blackboard brush, belonging to the field of teaching appliances, comprising a main box body, a brush plate, a dust storage box, a power input mechanism and a turbo fan; in addition, a planetary acceleration mechanism and a reversing mechanism are provided. The invention adopts a purely mechanical mechanism, uses the movement of the blackboard brush to drive the turbine fan to rotate, and can efficiently remove the dust generated in the classroom chalk on the blackboard; the brush strip has bristles with moderate hardness, which can prevent a large amount of dust from adhering to the bristles; The cooperation of the planetary gear and the sun gear can increase the speed of the turbofan, thereby increasing the suction generated by the turbofan; by setting the reversing mechanism, no matter which direction the blackboard brush moves, the steering of the drive shaft will always remain the same, thereby ensuring the turbine The fan is constantly vacuuming.

Description

A mechanical dust-absorbing blackboard brush

technical field

The invention relates to a teaching tool, in particular to a mechanical dust-absorbing blackboard brush.

Background technique

Chalk blackboard writing is an inevitable link in classroom teaching, and the dust generated during the process of wiping the blackboard will seriously affect the health of teachers and students and cause respiratory diseases. Therefore, different types of dust-absorbing blackboard brushes have appeared on the market. The dust-removing blackboard brush that seeps into the bristles includes an electric dust-removing blackboard, and a blackboard brush that adopts mechanical transmission. The blackboard brush that seeps into the bristles affects the timely utilization rate and causes a waste of resources. Although the electric blackboard brush can efficiently remove dust and reduce the labor intensity of the user, its cost is high, it needs to be driven by a battery, and the battery needs to be replaced. The replaced battery is likely to cause environmental pollution, and the internal structure is complicated. Life expectancy is greatly reduced. At present, there are also blackboard brushes for mechanical dust collection, but many of them have complex internal structures, insufficient transmission, difficult maintenance, or low dust collection efficiency, so dust removal cannot be achieved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a mechanical dust-absorbing blackboard brush to remove the dust generated in classroom chalk boards and provide a healthy teaching environment for teachers and students.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A mechanical dust-absorbing blackboard brush, comprising a main box, a brush plate, a dust box, a power input mechanism and a turbo fan; the power input mechanism is arranged on the top of the main box, and includes a belt, a nylon rope, an intermediate drive and two pulleys; the two pulleys are installed in the main box through the shaft, and the belt and the pulley are closely attached; the middle transmission wheel is fixed on the top of the vertical power input shaft and arranged between the two pulleys, and the middle transmission There are grooves in the circumferential direction of the wheel and the two pulleys, and the nylon rope is wound in the grooves of the intermediate drive wheel and the two pulleys;

The lower end of the power input shaft is fixedly connected with a first bevel gear, and a horizontal rotation shaft is provided in a direction perpendicular to the power input shaft. One end of the rotation shaft is connected with a second bevel gear meshing with the first bevel gear, and the other end is A turbofan is connected;

The brush plate is located under the power input mechanism, and the dust box is located at the bottom of the main box.

According to the above solution, the brush head of the brush board is a rectangular strip-shaped brush strip, the brush strip is provided with bristles, and the brush strip is arranged higher than the belt.

According to the above solution, it also includes a planetary acceleration mechanism arranged between the rotating shaft and the turbofan, the planetary acceleration mechanism includes a first planetary carrier, a planetary gear, a sun gear, a ring gear and a drive shaft; the first planetary carrier is connected to the rotating shaft, the first planet carrier is connected with a planetary gear, the planetary gear is meshed with the sun gear and meshed with the fixed ring gear, the sun gear is fixed on the drive shaft, and the other end of the drive shaft is connected to the turbofan.

According to the above scheme, it also includes a reversing mechanism arranged between the power input shaft and the first bevel gear, and the reversing mechanism includes a rotating gear, a connecting shaft, a ratchet, a ratchet, a power input gear, a transmission shaft and a power output gear ;

The bottom of the power input shaft is fixedly connected with the power input gear, the left side of the power input gear meshes with the ratchet, and the inside of the ratchet is meshed with a pawl, and both the pawl and the ratchet are fixedly installed on the connecting shaft; the lower part of the connecting shaft is also fixedly connected with a The rotating gear meshes with the power output gear fixedly connected to the top of the transmission shaft, and the lower end of the transmission shaft is connected to the first bevel gear;

With the axis center of the power input shaft as the center, the right side of the power input shaft is symmetrically provided with rotating gears, connecting shafts, pawls and ratchets; the working directions of the pawls and ratchets on the left and right sides are opposite.

Compared with the prior art, the beneficial effect of the present invention is: adopt purely mechanical mechanism, utilize the movement of blackboard brush to drive the turbine fan to rotate, can carry out efficient dedusting to the dust produced in classroom chalk blackboard; The bristles can prevent a large amount of dust from adhering to the bristles; through the cooperation of the planetary gear and the sun gear, the speed of the turbofan can be increased, thereby increasing the suction generated by the turbofan; by setting the reversing mechanism, no matter which direction the blackboard brush moves, The direction of rotation of the drive shaft remains unchanged, thereby ensuring that the turbofan is always in a state of dust suction.

Description of drawings

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing, wherein:

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the present invention;

Fig. 3 is a front structural schematic view of the power input mechanism of the present invention;

Fig. 4 is a top structural schematic diagram of the power input mechanism of the present invention;

Fig. 5 is the structural representation of reversing mechanism of the present invention;

Fig. 6 is a structural schematic diagram of the planetary acceleration mechanism of the present invention.

The interpretation of each label in the figure is: 1-main box, 2-brush plate, 3-dust box, 4-power input mechanism, 41-belt, 42-nylon rope, 43-intermediate drive wheel, 44-pulley , 5-reversing mechanism, 51-rotating gear, 52-connecting shaft, 53-pawl, 54-ratche, 55-fixed frame, 56-power input gear, 57-power input shaft, 58-transmission shaft, 59- Power output gear, 6-planetary acceleration mechanism, 61-sun gear, 62-first bevel gear, 63-second bevel gear, 64-planet carrier, 641-second planet carrier, 65-cylindrical ring, 66-bottom cover , 67-planetary gear, 68-ring gear, 69-end cover, 610-rotating shaft, 611-drive shaft, 7-turbine fan.

Detailed ways

The blackboard brush of the present invention comprises a main casing 1, a brush plate 2, a dust box 3, a power input mechanism 4, a reversing mechanism 5, a planetary acceleration mechanism 6 and a turbo fan 7.

The function of the main box 1 is to assemble the brush plate 2, the dust box 3, the power input mechanism 4, the reversing mechanism 5, the planetary acceleration mechanism 6 and the turbofan 7 into a compact overall structure. The profile of the main box body 1 is roughly a square structure, and a diversion groove with a certain deflection angle is arranged inside, and holes of a certain shape are arranged on both sides thereof, and filter screens are housed on the holes. The brush head in the brush plate 2 is a rectangular strip-shaped brush strip, and the brush strip has bristles with moderate hardness, which can prevent a large amount of dust from adhering to the bristles. The brush strip is five to eight millimeters above the belt 41 .

The power input mechanism 4 is located on the top of the blackboard brush. Wherein, two pulleys 44 are installed in the main box body 1 through shafts, the belt 41 and the pulleys 44 are closely attached, and the intermediate transmission pulley 43 is arranged between the two pulleys 44 . The circumferential direction of belt pulley 44 and intermediate transmission wheel 43 is provided with the groove of certain depth, and nylon rope 42 is wound in the groove of belt pulley 44 and intermediate transmission wheel 43, and groove depth is slightly larger than nylon rope 42 diameters, and the middle The transmission wheel 43 is fixed on the power input shaft 57 . When the blackboard brush erases the writing on the chalk on the blackboard, the friction between the blackboard and the belt 41 drives the pulley 44 to rotate, and the pulley 44 transmits the power to the intermediate transmission wheel 43 through the nylon rope 42 in the form of wire transmission, and the intermediate transmission wheel 43 power is input to the reversing mechanism 5 through the power input shaft 57 .

The reversing mechanism 5 is located below the power input mechanism 4 . The ratchet 54 in it is an internal meshing ratchet, and the outer circumference is processed into a tooth shape, and is meshed with the power input gear 56 fixed on the power input shaft 57, and the ratchet 54 is meshed with a pawl 53 inside. Pawl 53, ratchet 54 and rotating gear 51 are installed on the fixed mount 55 on the left side of power input shaft 57 by connecting shaft 52, and ratchet 53, ratchet 54 and ratchet 54 are arranged symmetrically on the fixed mount 55 on the right side of power input shaft 57. The gear 51 and the connecting shaft 52 are rotated. The rotating gear 51 meshes with the power output gear 59 , and the power output gear 59 is fixed on the transmission shaft 58 . In the reversing mechanism 5, two ratchets 54 and pawls 53 are arranged symmetrically with respect to the axis of the power input shaft 57, and the working directions are opposite. The combination of the symmetrical ratchet 54 and the ratchet 53 rotates idle, and the combination of the power input gear 56 and different ratchets 54 and the ratchet 53 realizes that the rotation of the transmission shaft 58 remains unchanged to ensure that the turbofan 7 is always in the dust-absorbing state. When the blackboard brush wipes the blackboard in a certain direction, the power input shaft 57 transmits the power to the ratchet 54 on a certain side through the power input gear 56, and the ratchet 54 meshes with the ratchet 53, and drives the rotating gear 51 by the connecting shaft 52, thereby Drive power output gear 59 to rotate, and transmission shaft 58 is obtained power; When blackboard brush wipes blackboard toward opposite direction, power input shaft 57 turns to opposite, and above-mentioned ratchet 54 is idling, and its symmetrical ratchet pawl combination rotates. Ultimately no matter which direction the blackboard brush moves towards, the turning direction of the transmission shaft 58 remains unchanged, thereby ensuring that the turbofan 7 is always in the dust-absorbing state.

The planetary acceleration mechanism 6 is located below the reversing mechanism 5, and the first bevel gear 62 and the second bevel gear 63 in it mesh, the first bevel gear 62 is rigidly connected with the drive shaft 58 through an adhesive, and the second bevel gear 63 is connected with the first planet carrier 64 through the rotation shaft 610 . The power obtained from the transmission shaft 58 is transmitted to the first planet carrier 64 through the meshing first bevel gear 62 and the second bevel gear 63. The first planet carrier 64 is connected with a planetary wheel 67, and the other side of the planetary wheel 67 is also connected There is a second planet carrier 641, the planetary gear 67 drives the sun gear 61 with a larger gear modulus to rotate, the sun gear 61 transmits power to the drive shaft 611 fixedly connected with it, and the drive shaft 611 drives the turbofan 7 to rotate, so that the turbofan 7 Inhale air into the main box 1 to form a negative pressure, the dust is sucked into the main box 1, and enters the dust box 3 through the diversion groove on the main box 1. The planetary acceleration mechanism 6 is fixed by the ring gear 68, the first planetary carrier 64 is input, and the sun gear 61 is output to increase the rotational speed of the turbofan 7, thereby improving the dust collection efficiency. In the planetary acceleration mechanism 6 , the cylindrical end cover 69 and the bottom cover 66 adopt an interference fit, which is detachable and can fix the ring gear 68 at the same time; the cylindrical ring 65 and the bottom cover 66 are connected by adhesive. The combination of the end cover 69, the bottom cover 66 and the cylindrical ring 65 can ensure the normal operation of the planetary gear train and prevent the interference of dust, and all adopt light materials.

The dust box 3 is located at the bottom of the main box 1 and adopts a detachable design with the main box 1. When the dust box 3 is full of dust, it can be detached and poured out.

The brush plate 2 is located between the dust collection box 3 and the power input mechanism 4, and is detachably connected to the main box body 1, specifically a snap connection, which is convenient for quick replacement.

The blackboard brush of the present invention absorbs dust synchronously when erasing chalk writing on the blackboard, and its usage method is the same as that of general blackboard brushes. The dust-absorbing structure of the blackboard brush adopts mechanical transmission, and the power is obtained through the conversion of mechanical energy, which can reduce energy consumption. Through the planetary acceleration mechanism 6, the turbofan 7 can obtain a relatively high rotational speed, thereby improving the dust collection efficiency. The internal structure of the blackboard brush is mostly standard parts such as gears, which are easy to replace and maintain.

Claims (4)

1. A mechanical dust-absorbing blackboard brush is characterized in that: it comprises a main casing (1), a brush plate (2), a dust accumulation box (3), a power input mechanism (4) and a turbo fan (7); Described power input mechanism (4) is arranged on the top of main casing (1), comprises belt (41), nylon rope (42), intermediate transmission wheel (43) and two pulleys (44); Two pulleys (44) is installed in the main box (1) through the shaft, and the belt (41) is closely attached to the pulley (44); the intermediate transmission wheel (43) is fixed on the top of the vertical power input shaft (57) and is arranged on Between the two pulleys (44), grooves are provided in the circumferential direction of the intermediate transmission pulley (43) and the two pulleys (44), and the nylon rope (42) is wound around the intermediate transmission pulley (43) and the two pulleys. (44) in the groove; The lower end of the power input shaft (57) is fixedly connected with a first bevel gear (62), and a horizontal rotation shaft (610) is arranged in a direction perpendicular to the power input shaft (57), and one end of the rotation shaft (610) is connected to There is a second bevel gear (63) meshing with the first bevel gear (62), and the other end is connected with a turbofan (7); The brush plate (2) is located under the power input mechanism (4), and the dust box (3) is located at the bottom of the main box body (1). 2. A kind of mechanical dust-absorbing blackboard brush according to claim 1, is characterized in that: the brush head of described brush board (2) is rectangular strip brush strip, is provided with bristle on the brush strip, and the brush strip is higher than belt set. 3. A kind of mechanical dust-absorbing blackboard brush according to claim 1, characterized in that: it also includes a planetary acceleration mechanism (6) arranged between the rotating shaft (610) and the turbofan (7), and the planetary Accelerating mechanism (6) comprises first planetary carrier (64), planetary gear (67), sun gear (61), ring gear (68) and driving shaft (611); First planetary carrier (64) is connected to rotating shaft ( 610), the first planetary carrier (64) is connected with a planetary gear (67), the planetary gear (67) meshes with the sun gear (61) and meshes with the fixed ring gear (68), and the sun gear (61) is fixed on the drive On the shaft (611), the other end of the drive shaft (611) is connected to the turbofan (7). 4. A kind of mechanical dust-absorbing blackboard brush according to claim 1, characterized in that: it also includes a reversing mechanism (5) arranged between the power input shaft (57) and the first bevel gear (62), The reversing mechanism (5) includes a rotating gear (51), a connecting shaft (52), a pawl (53), a ratchet (54), a power input gear (56), a transmission shaft (58) and a power output gear (59 ); The bottom of the power input shaft (57) is fixedly connected with the power input gear (56), and the left side of the power input gear (56) meshes with the ratchet (54), and the inside of the ratchet (54) is meshed with a ratchet (53). (53) and ratchet (54) are all fixedly mounted on the connecting shaft (52); The power output gear (59) at the top is meshed, and the lower end of the drive shaft (58) is connected to the first bevel gear (62); Taking the shaft center of the power input shaft (57) as the center, the right side of the power input shaft (57) is symmetrically provided with rotating gear (51), connecting shaft (52), ratchet (53) and ratchet (54); Side ratchet (53) and the working direction of ratchet (54) combination are opposite.