CN204184094U - A kind of blackboard surface cleaning device - Google Patents

Abstract

A blackboard surface cleaning device, belonging to the technical field of teaching equipment, comprising a casing, a dust suction fan, a motor and a brush wheel with ventilation holes, the motor is a fixed shaft motor, the upper end of the motor shaft is fixedly connected in the casing, and the motor The lower end of the shaft is connected with the center of the brush wheel through a bearing, and the first gear and the dust suction fan are fixedly set on the motor casing; a second gear is also arranged in the casing, and the second gear is meshed with the first gear, and the second gear is meshed with the first gear. A gear rotates coaxially with the third gear, the edge of the brush wheel is provided with gear teeth, the third gear meshes with the teeth on the edge of the brush wheel, and the lower part of the brush wheel is provided with a number of rows of hair brush; a dust collection ring is provided outside the dust collection fan, a filter screen is provided inside the dust collection ring, and an air outlet corresponding to the dust collection ring is provided on the side of the housing. The utility model has the advantages of simple structure, small volume, high efficiency, good dust suction effect, convenient portability, strong practicability, convenient disassembly and low cost.

Description

A blackboard surface cleaning device

Technical field:

The utility model belongs to the technical field of teaching equipment, and in particular relates to a blackboard surface cleaning device which is small, portable, has high blackboard wiping efficiency and little dust.

Background technique:

In current teaching, multimedia teaching has been widely used, but the traditional blackboard teaching is still the most widely used teaching method. Blackboard teaching is more intuitive, and it is easier for teachers to express their teaching ideas. But larger dust can be raised when wiping the blackboard with common blackboard, and dust has bigger impact to the health of teacher and classmate, and can pollute classroom environment.

The existing automatic blackboard cleaning devices all use a device set on the blackboard at the same height as the blackboard for cleaning and dust collection. Although this device has high efficiency and good dust removal effect, it has a large volume and high cost. Moreover, the blackboard writing in a certain position cannot be erased in a targeted manner, and all the writing on the blackboard can only be cleared at once, which is not very practical.

Utility model content:

In order to solve the problems existing in the prior art, the utility model proposes a blackboard surface cleaning device with small volume, high efficiency, dust-absorbing function and strong practicability.

In order to achieve the above purpose, the utility model adopts the following technical scheme, a blackboard surface cleaning device, including a casing, a dust suction fan, a motor and a brush wheel with ventilation holes, the motor is a fixed shaft motor, and the upper end of the motor shaft It is fixedly connected in the casing, the lower end of the motor shaft is connected with the center of the brush wheel through a bearing, the upper part of the motor casing is fixedly fitted with a first gear, and the lower part of the motor casing is fixedly fitted with a dust suction fan; the casing is also provided with a second gear, the second gear meshes with the first gear, the first shaft is set in the housing through a bearing, the second gear is fixedly sleeved on the first shaft, and the bottom end of the first shaft is also fixedly sleeved with a third gear, The edge of the brush wheel is provided with gear teeth, and the third gear meshes with the teeth on the edge of the brush wheel. The bottom of the brush wheel is provided with several rows of brushes; the outside of the dust suction fan is provided with The dust collection ring is provided with a filter screen inside the dust collection ring, and an air outlet corresponding to the dust collection ring is provided on the side of the shell.

The shell is also provided with a detachable shell, the detachable shell and the shell are connected by interference fit, and the upper end of the motor shaft is fixedly connected to the bottom of the detachable shell.

The speed ratio of the dust suction fan to the brush wheel is 9:1.

The transmission ratio between the first gear and the second gear is 3:5, and the transmission ratio between the third gear and the brush wheel is 15:1.

A fixed brush is arranged at the rear of the bottom of the housing.

The utility model has the beneficial effects of simple structure, small size, high efficiency, good dust collection effect, convenient portability, strong practicability, convenient disassembly and low cost.

Description of drawings:

Fig. 1 is the structural representation of an embodiment of the utility model;

Fig. 2 is a partial sectional view of Fig. 1;

Among them: 1-shell, 2-removable shell, 3-motor, 4-brush wheel, 5-vacuum fan, 6-first shaft, 7-motor shaft, 8-first gear, 9-second gear , 10-third gear, 11-hair brush, 12-dust ring, 13-air outlet, 14-battery, 15-fixed brush, 16-first bearing, 17-second bearing, 18-third bearings.

Detailed ways:

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment: As shown in Fig. 1～Fig. Wheel 4, the motor 3 is a fixed shaft motor, the upper end of the motor shaft 7 is fixedly connected to the bottom of the detachable shell 2, the lower end of the motor shaft 7 is connected to the center of the brush wheel 4 through the first bearing 16, and the detachable shell 2 is connected to the center of the brush wheel 4. The shells 1 are connected by interference fit, the upper part of the shell of the motor 3 is fixedly set with a first gear 8, and the lower part is fixedly set with a dust suction fan 5; the shell 1 is also provided with a second gear 9, the second gear 9 Mesh with the first gear 8, the second gear 9 is fixedly sleeved on the first shaft 6, the first shaft 6 is set in the housing 1 through the second bearing 17 and the third bearing 18, wherein the second bearing 17 is set on the second At the top of the first shaft 6, the third bearing 18 is arranged at the middle part of the first shaft 6, and the third gear 10 is also fixedly sleeved at the bottom of the first shaft 6, and the edge of the brush wheel 4 is provided with gear teeth, so The third gear 10 is meshed with the gear teeth on the edge of the brush wheel 4, and the bottom of the brush wheel 4 is provided with some rows of brushes 11; the outside of the dust suction fan 5 is provided with a dust collection ring 12, and the dust collection ring 12 is provided with a filter screen, and an air outlet 13 corresponding to the dust collection ring 12 is provided on the side of the casing 1; a battery 14 and a touch switch are connected in series on the two electrodes of the motor 3, the battery 14 is arranged in the casing 1, and the touch switch It is arranged on the outer surface of the shell 1.

When the blackboard needs to be cleaned, at first lightly touch the touch switch to make the motor 3 start to rotate. The motor 3 is a fixed-axis motor, and the motor casing will drive the dust suction fan 5 to rotate, and the first gear 8 will also rotate at the same time, further driving the second gear. The second gear 9 rotates, the second gear 9 drives the third gear 10 to rotate through the first shaft 6 , and the third gear 10 drives the brush wheel 4 to rotate through the teeth on the brush wheel 4 . Put the brush 11 close to the blackboard to automatically clean the blackboard. During this period, the dust suction fan 5 will inhale the dust and filter it through the filter in the dust collection ring 12, and then store it in the dust collection ring 12. The air will flow from the air outlet 13 out without polluting the environment.

The transmission ratio of the first gear 8 and the second gear 9 is 3:5, and the transmission ratio of the third gear 10 and the brush wheel 4 is 15:1. Since the first gear 8 and the dust suction fan 5 rotate at the same speed, the second The speed ratio of the second gear 9 and the third gear 10 is the same, so the speed ratio of the dust suction fan 5 and the brush wheel 4 is 9:1. Through experiments, the speed ratio of 9:1 can not only ensure the efficiency of the brush 11 to wipe the blackboard but also ensure The dust suction fan 5 can collect most of the dust.

A fixed brush 15 is provided at the rear of the bottom of the housing 1, which can be used to manually remove specific, small-scale handwriting on the blackboard.

When the dust is collected to a certain amount, hold the shell 1 tightly with one hand, and push the detachable shell 2 downward with the other hand, then the detachable shell 2 can be connected with the motor 3 and the first gear 8, The brush wheel 4 connected to the lower end of the dust suction fan 5 and the motor shaft 7 is released from the bottom of the casing 1, and then the dust in the dust collection ring 12 can be cleaned. After all the dust is cleaned, the detachable shell 2, the motor 3, the first gear 8, the dust suction fan 5 and the brush wheel 4 are installed back into the shell 1 according to the opposite method to continue to use.

Claims (5)

1. a blackboard surface cleaning device, it is characterized in that: comprise shell, dust absorption fan, motor and there is the bristle brush wheel of air vent, described motor is fixing shaft type motor, the upper end of motor shaft is fixedly connected with in the enclosure, the lower end of motor shaft is connected by bearing with bristle brush wheel center, the top fixed cover of motor housing is equipped with the first gear, and the bottom fixed cover of motor housing is equipped with dust absorption fan; Also be provided with the second gear in the enclosure, described second gear is meshed with the first gear, first axle arranges in the enclosure by bearing, second gear is fixedly set on the first axle, in the bottom of the first axle, also fixed cover is equipped with the 3rd gear, the edge of described bristle brush wheel is provided with the gear teeth, and described 3rd gear is meshed with the gear teeth at bristle brush wheel edge, and the bottom of described bristle brush wheel is provided with some row's hairbrush; There is control of dust ring in the outer setting of dust absorption fan, in control of dust ring, be provided with filter screen, shell side face is provided with the gas outlet corresponding with control of dust ring.

2. blackboard surface cleaning device according to claim 1, it is characterized in that: described shell is also provided with removable shell, removable shell is connected with adopting interference fit between shell, the upper end of motor shaft is fixedly connected on bottom removable shell.

3. blackboard surface cleaning device according to claim 1, is characterized in that: the rotating ratio of described dust absorption fan and bristle brush wheel is 9:1.

4. blackboard surface cleaning device according to claim 3, is characterized in that the gearratio of described first gear and the second gear is 3:5, and the gearratio of the 3rd gear and bristle brush wheel is 15:1.

5. blackboard surface cleaning device according to claim 1, is characterized in that: the rear portion of described outer casing bottom is provided with fixed hairbrush.