CN203221470U - Electric tool - Google Patents

Abstract

Provided is an electric tool, comprising a housing, a power component, a transmission mechanism, an execution mechanism and a dust blowing and absorbing component. The power component comprises a motor disposed in the housing. A power output shaft of the motor is connected to a power input shaft of the transmission mechanism. The power output end of the transmission mechanism is connected to the execution mechanism. The dust blowing and absorbing component comprises a cavity, and a fan, a power supply, a control assembly, and a dust-collecting member, with the latter four being disposed in the cavity. The cavity is disposed in the housing and is sealed with respect to the internal part of the housing, and a ventilation chamber is disposed in the cavity. Two ends of the cavity are respectively provided with a first ventilating opening and a second ventilating opening, communicating with the ventilation chamber. The first ventilating opening is disposed on the housing, adjacent to the execution mechanism, and the second ventilating opening is sleeved by the dust-collecting member. The control assembly can control the fan to rotate along a first direction or a second direction, opposite to the first direction. The power supply is used for providing power for the fan.

Description

electrical tools

technical field

The utility model relates to a power tool, in particular to an electric tool with the function of blowing dust.

Background technique

At present, there is no self-cleaning function on the general power tools. When the operator uses these power tools to work, especially when processing workpieces such as wood, a large amount of dust will be generated during the processing, so he has to wear a mask. Dust is also harmful to the environment. In order to reduce the hazards of dust in the processing process, some electric tools need to be connected to external special vacuum equipment, and the special vacuum equipment is connected to the adapter that comes with the power tool to achieve the dust collection effect. However, the special vacuum equipment is expensive and relatively small. It is large, and the noise is louder when working, and an adapter capable of connecting the electric tool with a special vacuuming device needs to be provided, which leads to a higher cost of the electric tool.

Existing electric tools generally use a fan installed on the motor shaft to cool the motor to achieve dust blowing. Since the electric tool cannot stop the fan when it is started, the airflow of the motor fan will seriously affect the The efficiency of dust collection cannot be completely blocked even if a blower switch is designed to block the air flow of the motor fan, and the blower switch also increases the complexity and production cost of the electric tool at the same time.

Also, since the fan cannot be stopped when the power tool is turned on, the hot air will blow to the operator, or raise dust and wood chips, making the operating environment worse and affecting visibility.

In addition, in the existing technical solutions, dust blowing can only be realized after the electric tool is started, and the fan is always working when the machine is working, which will lead to energy loss, and the interaction between the airflow and the casing will also generate noise.

Contents of the invention

In order to solve the above problems, it is necessary to provide an electric tool with the function of blowing dust, which is energy-saving, environment-friendly and low in cost.

An electric tool, comprising a casing, a power component, a transmission mechanism, an actuator and a dust-blowing component, the power component includes a motor arranged inside the casing, the power output shaft of the motor and the power input of the transmission mechanism The shafts are connected, and the power output end of the transmission mechanism is connected to the actuator. The dust blowing and dust-absorbing components include a cavity, a fan installed in the cavity, a power supply, a control component and a dust collection piece. The cavity is set in the shell The body is sealed relative to the inside of the housing. A ventilation cavity is formed in the cavity, and a first ventilation opening and a second ventilation opening communicating with the ventilation cavity are respectively formed at both ends of the cavity. The first ventilation opening is located in the housing Close to the actuator, the second vent is covered with a dust collector; the control assembly can control the fan to rotate in the first direction or the opposite second direction, the control assembly is connected to the fan and the power supply, and the power supply Used to power the fan.

As an improvement to the above solution, the first vent is a wedge-shaped structure, and the width of the first end of the first vent close to the actuator is smaller than the width of the second end connected to the vent cavity.

As a further improvement of the above solution, the first ventilation opening and the second ventilation opening are wedge-shaped structures, and the width of the first end of the first ventilation opening close to the actuator is smaller than the width of the second end connected to the ventilation cavity; The width of the first end of the second air opening close to the dust collecting bag is smaller than the width of the second end connected with the air cavity.

Preferably, the control assembly includes a toggle switch and a fan reversing mechanism, the toggle switch includes a start gear for turning the fan and a stop gear for stopping the fan, and the fan reversing mechanism is used to adjust the wind direction.

Preferably, the fan reversing mechanism includes a pivot that is arranged on the fan and can make it rotate as a whole, a pivot channel for installing the pivot is provided on the casing, and a An elastic reset locking mechanism.

Preferably, one end of the pivot is connected with a rotatable pivot dial, and the housing is correspondingly provided with a circular groove for the dial to rotate, the groove communicates with the pivot channel, and the elastic reset lock The tightening mechanism is arranged between the dial and the groove.

Preferably, the elastic reset locking mechanism includes two recesses arranged symmetrically on the groove with the pivot as the center, and a receiving hole corresponding to the recesses is provided on one side of the dial, and the elastic reset lock The tightening mechanism also includes a compression spring arranged in the receiving hole and a convex cap engaged with the recess, one end of the compression spring is held against the top of the receiving hole, and the other end is sleeved in the convex cap to press the convex cap against the top of the receiving hole. in the recess.

Preferably, the control assembly includes a micro switch, and the two ends of the micro switch are respectively connected to the power supply and the fan, and the micro switch includes a dust suction gear that makes the fan rotate in the first direction, so that the fan can rotate in the first direction. The dust blowing gear rotates in the second direction and the stop gear stops the fan; the micro switch can control the forward and reverse rotation of the fan blades; the fan is an AC fan, and the power supply is an AC power supply.

Preferably, the fan includes two first fans and a second fan arranged back to back, both of the first fan and the second fan are DC axial flow fans, and the rotation direction of the first fan is the The first direction, the rotation direction of the second fan is the second direction, when the micro switch is in the dust suction gear, the first fan rotates, and the second fan stops rotating; when the micro switch is in the dust blowing gear , the first fan stops rotating, and the second fan rotates; when the micro switch is in the stop position, both the first fan and the second fan stop rotating.

The electric tool of the utility model sets a cavity sealed relative to the inside of the utility model, and a fan driven by a power supply is set in the cavity. The fan can realize positive and negative rotation under the drive of the control component. To achieve the effect of dust blowing and vacuuming, the structure is simple and compact, and it well avoids the influence of the airflow generated by the motor cooling fan on the effect of dust blowing and vacuuming. When there is dust, the power supply can be disconnected, so as to save energy as much as possible. The electric tool of the utility model can collect a large amount of dust and suspended particles during work, thereby reducing the damage to the operator and the pollution to the environment.

Description of drawings

Below in conjunction with accompanying drawing and example the utility model is described further.

Fig. 1 is a schematic structural view of the electric tool of the present invention in the first embodiment;

Fig. 2 is a schematic structural view of the fan reversing mechanism of the electric tool shown in Fig. 1;

Fig. 3 is the enlarged schematic diagram of place A in Fig. 2;

Fig. 4 is a schematic structural view of the electric tool of the present invention in the second embodiment;

Fig. 5 is a structural schematic view of the power tool of the present utility model when blowing dust in the third embodiment;

Fig. 6 is a schematic structural view of the power tool of the present utility model when it is vacuuming in the third embodiment.

Detailed ways

Please refer to FIG. 1 , as an electric tool 10 in the first embodiment of the present invention, it includes a housing 11 , a power component 12 , a transmission mechanism 13 , an actuator 14 and a blowing and suctioning component 15 . In this embodiment, the power tool 10 is described in detail by taking a jigsaw as an example.

The power component 12 is used to transmit power to the transmission mechanism 13 , which includes a motor 120 disposed inside the housing 11 and a power source (not shown) that provides a power source for the motor 120 .

The transmission mechanism 13 is used to transmit the power provided by the power component 12 to the actuator 14, which includes a transmission assembly 130 and a slide bar assembly 131, the power output shaft 1201 of the motor 120 is connected with the power input shaft 1301 of the transmission assembly 130, and the slide bar assembly One end of 131 is connected to the power output end of the transmission assembly 130 , and the other end is connected to the actuator 14 . In this embodiment, the transmission assembly 130 adopts spur gear transmission.

In a first embodiment, the actuator 14 may be a saw blade. It can be understood that the actuator 14 can also be one of the actuators of general electric tools such as drill bits, saw blades or grinding discs. It can be understood that in other electric tools, the transmission assembly 130 may be a worm gear structure, a bevel gear structure or other mechanisms capable of transmitting the kinetic energy of the motor to the actuator 14 to make it move. In addition, when there is no need to perform up and down reciprocating motion, the slide bar assembly 131 may not be required, and the output end of the transmission assembly 130 is directly connected to the actuator 14. Therefore, as long as it is a transmission that can realize the basic motion requirements of the actuator 14 The structure of mechanism 13 should all belong to the protection scope of the present utility model.

The dust blowing and suctioning component 15 includes a cavity 151 , a fan 152 disposed in the cavity 151 , a power supply 153 , a control assembly 154 and a dust collecting component 155 . The cavity 151 is arranged in the casing 11 and is sealed relative to the inside of the casing 11. A ventilation cavity 1510 is formed in the cavity 151. A first ventilation opening 1511 communicating with the ventilation cavity 1510 and a ventilation cavity 1511 are respectively formed at both ends of the cavity 151. The second ventilation opening 1512 and the first ventilation opening 1511 are located on the casing 11 close to the actuator 14 , and the second ventilation opening 1512 is covered with a dust collecting member 155 . The control assembly 154 is used to control the fan 152 to rotate in the first direction or the opposite second direction. When the fan 152 rotates in the first direction, it can guide the outside air to enter the ventilation cavity 1510 through the first ventilation opening 1511 and pass through the dust collecting member. 155 realizes the dust suction function, when the fan 152 rotates with the second direction, the dust collection part 155 can be taken off or the dust collection part 155 is made by the material that can make the air pass through the suspended particles, so that the air flow can pass through the first The vent 1511 is discharged to realize the dust blowing function, and the power supply 153 is used to provide power to the fan 152 independently.

When the air volume of the fan 152 is constant, in order to ensure a better dust-blowing effect, the first vent 1511 is a wedge-shaped structure, and the width of the first end of the first vent 1511 close to the actuator 14 is smaller than that of the ventilation port 1511. The width of the second end connected to the cavity 1510, so that the wind speed gradually increases from the ventilation cavity 1510 to the first ventilation opening 1511, so that a larger suction or blowing force is formed at the actuator 14, thereby achieving a better dust blowing effect . In order to reduce the size of the dust collecting part 155, the second vent 1512 is configured as a wedge-shaped structure, and the width of the first end of the second vent 1512 close to the dust bag 155 is smaller than the width of the second end connected to the ventilation cavity.

Please refer to FIG. 2 and FIG. 3 at the same time, the control assembly 154 includes a toggle switch 1540 and a fan reversing mechanism 1541, and the toggle switch 1540 includes a start gear (on gear) that makes the fan 152 rotate and a stop gear that makes the fan 152 stop rotating.

The fan reversing mechanism 1541 includes a pivot 1542 that is arranged on the fan 152 and can make it rotate as a whole. The casing 11 is provided with a pivoting channel 111 for installing the pivot 1542 . Between the pivot 1542 and the casing 11 is a An elastic reset locking mechanism 1543.

One end of the pivot 1542 is connected with a dial 1544 that can rotate the pivot 1542, and the housing 11 is correspondingly provided with a circular groove 112 for the rotation of the dial 1544. The groove 112 communicates with the pivot channel 111 and is elastically reset and locked. The mechanism 1543 is disposed between the dial 1544 and the groove 112 .

The elastic reset locking mechanism 1543 includes two recesses 1545 symmetrically arranged on the bottom wall of the groove 112 with the pivot 1542 as the center. One side of the dial 1544 is provided with a receiving hole 1546 corresponding to the recesses 1545. The elastic reset locking mechanism 1543 also includes a compression spring 1547 arranged in the receiving hole 1546 and a convex cap 1548 engaged with the concave portion 1545. One end of the compression spring 1547 is pressed on the top of the receiving hole 1546, and the other end is sleeved in the convex cap 1548 so that the convex cap 1548 Pressed tightly in the recess 1545.

It can be understood that the concave portion 1545 can also be arranged on the dial 1544, and the receiving hole 1546 corresponding to the concave portion 1545 can be processed on the bottom wall of the groove 112, and the convex cap 1548 can be connected with the concave portion 1545 arranged on the dial 1544. The fan 152 is fastened to the housing 11 by cooperating with each other and pressing the compression spring 1547 . In addition, as long as the dial 1544 and the groove 112 are mutually locked during operation, when the fan 152 needs to turn, the reset locking mechanism that the dial 1544 can rotate relative to the groove 112 should belong to the utility model. protected range.

Please refer to Fig. 1 again, the fan 152 rotates in the second direction, and the wind is blown to the vicinity of the actuator 14, and dust is blown; In the first direction, a negative pressure is formed at the first ventilation port 1511, and wood chips enter the ventilation chamber 1510 under the negative pressure, pass through the fan 152 and enter the dust collecting part 155, the machine realizes dust suction, and the fan 152 compresses the spring 1547 and The protrusion 1548 is held in this position. If you do not want to blow dust or dust when the machine is working, you can turn off the dial switch 1540 and place it in the stop position. This can save electricity and prolong the working time for energy-sensitive DC appliances with battery packs.

Please refer to Fig. 4, the electric tool 20 in the second embodiment of the utility model is similar to the electric tool 10 in the first embodiment, and also includes a housing 21, a power part 22, a transmission mechanism 23, an actuator 24 and a dust blower. Component 25, blowing dust component 25 includes a cavity 251, a fan 252 disposed in the cavity 251, a power supply 253, a control component 254 and a dust collecting component 255, the main difference of which is the control component 254 and the fan 252.

The control assembly 254 includes a micro switch 2540, the two ends of the micro switch 2540 are respectively connected to the power supply 253 and the fan 252, the fan 252 is an AC axial flow fan, the power supply 253 is an AC power supply, and the micro switch 2540 includes the fan 252 to operate as described The dust suction gear rotates in the first direction, the dust blowing gear rotates the fan 252 in the second direction, and the stop gear makes the fan 252 stop rotating. When the micro switch 2540 is turned to the dust blowing gear, as shown in Figure 3, the fan 252 rotates in the second direction, and the wind direction is blown to the vicinity of the actuator 24, which realizes dust blowing; when the micro switch 2540 is turned to the dust suction gear At this time, the output shaft of the built-in motor in the fan 252 is reversed and the blades of the fan 252 are driven to rotate in the first direction at the same time, forming a negative pressure at the first ventilation port 2511, and wood chips enter the ventilation cavity 2510 under the negative pressure and pass through The fan 252 enters the dust collecting part 255, and the machine realizes dust suction; if the machine is working, if neither dust blowing nor dust suction is desired, the micro switch 2540 can be placed in the stop position, thereby saving electric energy.

The fan 252 in the second embodiment does not necessarily have to use an AC fan, as long as the fan can realize its forward and reverse rotation through the setting of the micro switch 2540, it should belong to the protection scope of the present invention.

Please refer to FIG. 5 and FIG. 6, as the electric tool 30 in the third embodiment of the present utility model is the same as the electric tool 20 in the second embodiment, it also includes a housing 31, a power component 32, a transmission mechanism 33, and an actuator 34 And the dust blowing part 35, the dust blowing part 35 also includes a cavity 351, a fan 352 arranged in the cavity 351, a power supply 353, a control assembly 354 and a dust collection part 355, and the main difference is that the control assembly 354 and the fan 352 .

The control component 354 includes a micro switch 3540, and the two ends of the micro switch 3540 are respectively connected to the power supply 353 and the fan 352. The fan 352 is set back to back by two first fans 3520 and second fans 3521 of the same model, the first fan 3520 rotates in the first direction, and the second fan 3521 rotates in the second direction , when the micro switch 3540 is in the dust suction position, the first fan 3520 rotates, and the second fan 3521 stops rotating; when the micro switch 3540 is in the dust blowing position, the first fan 3520 stops rotating, and the second fan 3521 Rotate; when the micro switch was in the stop gear, the first fan 3520 and the second fan 3521 all stopped rotating. Since the current manufacturing process can produce smaller-sized DC axial flow fans, preferably, the first fan 3520 and the second fan 3521 are both DC axial flow fans to adapt to installation and use in electric tools and save space.

It can be understood that the first fan 3520 and the second fan 3521 may also be fan groups composed of the same number of fans of the same model.

In the utility model, a cavity sealed relative to the inside of the electric tool is arranged inside the electric tool, and a fan driven by a power supply is arranged in the cavity. To achieve the effect of dust blowing and vacuuming, the structure is simple and compact, and it well avoids the influence of the airflow generated by the motor cooling fan on the effect of dust blowing and vacuuming, and because it is driven by the power supply 7, when there is no need for dust blowing and The utility model can be disconnected when vacuuming, so as to save energy as much as possible. By installing the utility model on the electric tool, a large amount of dust can be collected during work, thereby reducing the damage to the operator and the pollution to the environment. .

The above is only a preferred embodiment of the utility model, and the utility model is not limited to the above-mentioned embodiment, as long as it achieves the technical effect of the utility model by the same means, it should belong to the protection scope of the utility model.

Claims (2)

1. electric tool, comprise housing, power part, transmission mechanism, executing agency and pressure-vaccum dirt parts, described power part comprises the motor that is arranged on enclosure interior, the power output shaft of described motor links to each other with the power input shaft of described transmission mechanism, the clutch end of described transmission mechanism connects executing agency, it is characterized in that: described pressure-vaccum dirt parts comprise cavity, be arranged on the fan in the cavity, power supply, Control Component and control of dust spare, described cavity is arranged in the housing and enclosure interior sealing relatively, be formed with a vented cavity in the cavity, be formed with first ventilating opening and second ventilating opening that communicates with vented cavity respectively at the two ends of cavity, described first ventilating opening is positioned on the housing to be located near executing agency, is set with control of dust spare on described second ventilating opening; Described Control Component can be controlled described fan with first direction or opposite second direction rotation, and described power supply is used for providing power to fan.

2. electric tool according to claim 1, it is characterized in that: described first ventilating opening is wedge structure, on first ventilating opening near the width of first end at the executing agency place width less than its second end that links to each other with described vented cavity.

3. electric tool according to claim 1, it is characterized in that: described first ventilating opening and second ventilating opening are wedge structure, the width of first end of locating near executing agency on first ventilating opening is less than the width of its second end that links to each other with vented cavity, and the width of first end of close dust bag is less than the width of its second end that links to each other with vented cavity on second ventilating opening.

4. according to any described electric tool in the claim 1 ~ 3, it is characterized in that: described Control Component comprises fork shift switch and fan changement, and described fork shift switch comprises makes fan the startup shelves that rotate and the lock catch that fan is stopped operating.

5. electric tool according to claim 4, it is characterized in that: described fan changement comprises the pivot that is arranged on the fan and can makes its unitary rotation, housing is provided with the pivot channel that pivot is installed, and is provided with an elastic reset retaining mechanism between described pivot and the housing.

6. electric tool according to claim 5, it is characterized in that: an end of described pivot is connected with the dial of rotatable pivot, the corresponding circular groove that rotates for dial that is provided with on the housing, described groove communicates with pivot channel, and described elastic reset retaining mechanism is arranged between described dial and the groove.

7. electric tool according to claim 6, it is characterized in that: described elastic reset retaining mechanism comprises two recesses that are symmetricly set on the groove diapire centered by pivot, side on the described dial is provided with the accepting hole corresponding with recess, described elastic reset retaining mechanism also comprises the compression spring that is arranged in the accepting hole and the protruding cap that fastens with described recess, described compression spring one end supports the top at accepting hole, and the other end is sleeved in the protruding cap protruding cap is pressed in the recess.

8. according to any described electric tool in the claim 1 ~ 3, it is characterized in that: described Control Component comprises microswitch, the microswitch two ends are connected on the power supply and blower, described microswitch comprises makes fan with the dust suction shelves of described first direction rotation, makes fan with the drifting dust shelves of described second direction rotation and the lock catch that fan is stopped operating.

9. electric tool according to claim 8, it is characterized in that: described fan is ac fan, and described microswitch can be controlled the rotating of electric fan, described power supply is AC power.

10. electric tool according to claim 9, it is characterized in that: described fan comprises first fan and second fan of two back-to-back settings, described first fan and second fan are the direct current aerofoil fan, the rotation direction of described first fan is described first direction, the rotation direction of second fan is described second direction, when microswitch was in the dust suction shelves, described first fan rotated, and second fan stops operating; When microswitch was in the drifting dust shelves, described first fan stopped operating, and second fan rotates; When microswitch was in lock catch, described first fan and second fan all stopped operating.

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