CN103894370B - Handheld blowing sucking machine - Google Patents

Abstract

A kind of Handheld blowing sucking machine, including motor and housing, the motor is fixed on the housing, the housing is provided with air inlet, air outlet, dust collecting opening and handle, fan is additionally provided with the housing, the output shaft of the fan and the motor shaft of motor are connected by deceleration device, and the output shaft of the motor shaft of the motor and the fan forms predetermined shaft angle；In the case where the fan output pressure is certain, the rotating speed of fan square square is inversely proportional with the diameter of fan, reduce the diameter of fan to increase the rotating speed of fan, so as to reduce the size of fan, and then reduce the size of housing, because the motor is set with the fan into predetermined shaft angle, then package size reduces in the output shaft axial direction of fan, and the spatial arrangement of whole machine is more compact, gripping balance is improve, so as to improve ease of use.

Description

Handheld Blower

technical field

The invention relates to a cleaning tool, in particular to a hand-held blower.

Background technique

Hand-held blower is widely used because of its convenient operation, time-saving and labor-saving.

A traditional hand-held blower generally includes a housing, a driving motor and a fan. The housing is provided with an air inlet, an air outlet, and a handle. The driving motor directly drives the fan to rotate. In the working mode of suction, operate with the handle, the suction generated by the fan absorbs external debris through the suction port, enters the dust bag, and collects them centrally; in the working mode of blowing, operate with the handle, the fan The generated suction is discharged through the air outlet provided on the casing, and the dust on the surface of the object is blown to clean the surface of the object.

However, the traditional drive motor generally drives the motor to directly drive the fan to rotate. When the power of the motor is constant, the speed of the motor will not be very high in order to ensure the output torque of the motor. In order to ensure the output torque and the speed of the motor at the same time, it is necessary to increase the power of the motor, thus increasing the size of the motor. The overall size of the hand-held blower is larger, and the grip balance is reduced.

Contents of the invention

Based on this, it is necessary to provide a hand-held blower for the problems of large size and poor grip balance of the hand-held blower.

A hand-held blower, including a drive motor and a housing, the drive motor is fixed to the housing to provide power for the hand-held blower; the housing is provided with an air inlet, an air outlet, and a dust collection port and a handle, a fan is also provided in the housing, the output shaft of the fan is connected to the motor shaft of the drive motor through a reduction gear, and the motor shaft of the drive motor and the output shaft of the fan form a predetermined shaft angle.

In one of the embodiments, the reduction gear comprises at least one pair of meshing bevel gears.

In one of the embodiments, the bevel gear makes the predetermined shaft angle formed by the motor shaft and the output shaft of the fan be 90°.

In one of the embodiments, the air outlet is provided with a blow-suction quick-change baffle plate, and the blow-suction quick-change baffle plate is adjusted by a blow-suction quick-change knob arranged outside the housing.

In one of the embodiments, the rotation speed of the fan is higher than 9000 rotations per minute, and the rotation speed of the driving motor is higher than 28000 rotations per minute.

In one of the embodiments, the handle is arranged on the top of the casing, the fan is a centrifugal fan, and the air inlet is provided with a guide part, and the guide part changes the direction of the air inlet from the direction of the centrifugal fan. The axial direction is changed to a radial direction, the air outlet and the dust collection port are located in the radial direction of the centrifugal fan, directly communicated with the centrifugal fan, and the air inlet, air outlet, dust collection port, handle and The axes of the fans are all on the same plane, and the driving motor is located below or above the casing.

In one of the embodiments, the air outlet is provided with a blow-suction quick-change baffle plate, and the blow-suction quick-change baffle plate is adjusted by a blow-suction quick-change knob arranged outside the casing.

In one embodiment, the motor shaft sleeve of the driving motor is provided with a cooling fan, which is driven by the motor shaft to rotate simultaneously with the driving motor, so as to speed up the flow of air in the driving motor and reduce the temperature of the driving motor.

In one of the embodiments, the air inlet is detachably installed with an air inlet pipe, and the air inlet is installed with a safety guard, and the safety guard is pivotally connected to the air inlet.

In one of the embodiments, the end of the fan away from the output shaft is provided with crushing blades.

When the above hand-held blower is working, the drive motor drives the fan to rotate, the output shaft of the fan is connected to the motor shaft of the drive motor through a reduction device, and the drive motor forms a predetermined axis angle with the fan; Under the condition that the output pressure of the fan is constant, the square of the rotating speed of the fan is inversely proportional to the square of the diameter of the fan, so when the rotating speed of the fan increases, the diameter of the fan decreases, and the size of the fan can be reduced at this time, thereby Reduce the size of the housing; and in order to increase the speed of the fan and ensure the output torque of the drive motor, it is necessary to increase the power of the drive motor and equip a higher-power drive motor, because the drive motor and The fan is arranged at a predetermined shaft angle, so that the size of the whole machine is reduced in the axial direction of the output shaft of the fan, and the spatial arrangement of the whole machine is more compact, which improves the balance of the grip, thereby improving the convenience of use.

Description of drawings

Fig. 1 is a schematic structural view of the hand-held blowing machine when it is in the sucking state;

Fig. 2 is a schematic structural view of the hand-held blower in the blowing state;

Fig. 3 is a structural schematic view of the hand-held air blower shown in Fig. 2 when the air inlet pipe is not installed.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 1 and FIG. 2 , a hand-held air blower 100 includes a drive motor 110 and a housing 120, and the drive motor 110 is fixed to the housing 120 to provide power for the hand-held air blower 100; The housing 120 is provided with an air inlet 122, an air outlet 124, a dust collecting outlet 126 and a handle 128. The housing 120 is also provided with a fan 130, the output shaft 132 of the fan 130 and the motor shaft 112 of the driving motor 110 The motor shaft 112 of the driving motor 110 and the output shaft 132 of the fan 130 form a predetermined shaft angle by being connected through a reduction gear 140 .

When the above-mentioned hand-held air blower is working, hold the handle 128, turn on the switch of the drive motor 110, the drive motor 110 rotates, and the drive motor 110 transmits power to the fan 130 through the reduction device 140, driving the fan 130 located in the housing 120. The fan 130 inside rotates. The output shaft 132 of the fan 130 and the motor shaft 112 of the driving motor 110 are connected through a reduction gear 140 , and the motor shaft 112 of the driving motor 110 and the output shaft 132 of the fan 130 form a predetermined shaft angle. Because under the condition that the output pressure of the fan 130 is constant, the square of the rotational speed of the fan 130 is inversely proportional to the square of the diameter of the fan 130, so when the rotational speed of the fan 130 increases, the diameter of the fan 130 decreases. The size of the fan 130 is reduced, thereby reducing the size of the casing 120 . In order to increase the rotating speed of the fan 130 and ensure the output torque of the drive motor 110, the power of the drive motor 110 needs to be increased, and the drive motor 110 with a larger power is equipped, because the motor shaft of the drive motor 110 112 and the output shaft 132 of the fan 130 are set at a predetermined axial angle, the size of the whole machine is reduced in the axial direction of the output shaft 132 of the fan 130, the space arrangement of the whole machine is more compact, and the grip balance is improved, thereby Ease of use has been improved.

Specifically in this embodiment, the rotation speed of the fan can reach more than 9000 rotations per minute, and the rotation speed of the driving motor can reach more than 28000 rotations per minute. When the rotating speed of the fan reaches more than 9000 revolutions per minute, greater wind power can be provided, and the blowing and suction efficiency is higher. When the rotational speed of the drive motor reaches more than 28,000 revolutions per minute, it can meet the rotational speed requirement of the fan, and at the same time, the output torque of the fan can be guaranteed by decelerating through the reduction device.

Please refer to FIG. 1 , specifically in this embodiment, the reduction device 140 includes at least one pair of meshing bevel gears. Bevel gears are divided into straight bevel gears, helical bevel gears, and curved bevel gears. Bevel gears are used to transmit motion and power between two intersecting shafts, and the angle between the two shafts can be arbitrary. The straight-toothed bevel gear transmission with a 90° intersection angle between two shafts is most widely used in mechanical transmission, that is, the bevel gear used when the motor shaft 112 and the output shaft of the fan 130 form a 90° angle in this embodiment. The single-stage transmission ratio of the bevel gear can reach 6, the maximum can reach 8, and the transmission efficiency is generally 0.94 to 0.98. When the motor shaft 112 and the output shaft of the fan 130 are arranged at an angle of 90°, the axial dimension of the output shaft of the fan 130 is the smallest, so the axial dimension of the output shaft of the fan 130 can be reduced to the greatest extent, and the whole machine row The cloth is more scientific and reasonable. When the hand-held fan is held by the handle, the torque to be overcome is reduced, and the balance of the holding is improved. Of course, in other embodiments, the motor shaft 112 of the driving motor 110 and the output shaft 132 of the fan 130 can be other predetermined shaft angles, which does not affect the purpose of reducing the axial size.

Please refer to FIG. 1 , specifically in this embodiment, the handle 128 is arranged on the top of the casing 120, the fan 130 is a centrifugal fan, and the air inlet 122 is provided with a guide part 1222, and the guide part 1222 will The direction of the air inlet 122 is changed from the axial direction of the centrifugal fan to the radial direction, the air outlet 124 and the dust collection port 126 are located in the radial direction of the centrifugal fan, directly communicated with the centrifugal fan, and The axes of the air inlet, air outlet, dust collection outlet, handle and fan are all in the same plane, and the drive motor 110 is located below or above the casing 120 . In this embodiment, the centrifugal fan mainly adopts the working mode of air inlet in the axial direction and air outlet in the radial direction. When the centrifugal fan is driven by the motor shaft to rotate, the gas filled between the blades is driven by the blades and is thrown to the outer edge of the blades due to centrifugal force. After the pressure energy and kinetic energy of the gas increase, it flows from the outer edge of the blades Outflow, negative pressure is formed in the middle of the fan blade, so that the gas is continuously sucked and discharged, generating axial suction and radial blowing force. Through the guide part 1222 arranged at the air inlet 122, the direction of the air intake is changed to prevent the direction of the air inlet 122 from being located on the side where the operator is in contact with during operation, thereby reducing the amount of air intake, thereby reducing the operating pressure of the hand-held blower. work efficiency. The air outlet 124 and the dust collection outlet 126 are all located in the radial direction of the centrifugal fan, so when the gas is thrown to the outer edge of the fan blade, it can be directly thrown to the air outlet 124 or the dust collection outlet 126, reducing the loss of wind pressure . The direction of the air duct formed by the air inlet 122, the air outlet 124 and the dust collection outlet 126 is parallel, and the axes of the air inlet, air outlet, dust collection outlet, handle and fan are all on the same plane, And the centrifugal fan is connected with the motor shaft 112 at an axial angle, so the motor shaft 112 is in the same plane as the air inlet 122 and the air outlet 124, so it is positioned at the top of the housing 120 when held by hand. When using the handle 128, it only needs to provide lifting force without overcoming torque, which further improves the balance when holding.

Please refer to FIG. 1 and FIG. 2 , specifically in this embodiment, the air outlet 124 can be provided with a blow-suction quick-change baffle 150 , and the blow-suction quick-change baffle 150 can Quick change knob 160 adjustment. When the hand-held blower is in the working mode of suction, the fan 130 rotates to generate suction at the air inlet 122 to absorb external dust. One layer of dividing plate prevents the dust sucked in from being discharged toward the air outlet 124. A dust bag can be installed at the dust collecting port 126 to guide the dust sucked in through the air inlet 122 into the dust bag for centralized collection. When the hand-held blower needs to use the blowing working mode, the blowing and sucking quick change knob 160 is used to adjust the blowing and sucking quick change baffle plate 150 so that the air outlet 124 communicates with the air inlet 122. The end cover seals the dust collection port 126 to prevent the dust collection port 126 from communicating with the air inlet 122, which affects the working efficiency of the hand-held blower in the blowing mode.

Please refer to Fig. 1, specifically in this embodiment, the motor shaft 112 of the drive motor 110 can be sleeved with a cooling fan 170, and the cooling fan 170 is driven by the motor shaft 112 to rotate simultaneously with the drive motor 110, so as to speed up the air flow in the drive motor 110. The flow velocity decreases, reducing the temperature of the drive motor 110 . When the driving motor 110 is running, it will generate heat. By setting the cooling fan 170 on the motor shaft 112 and rotating together with the motor shaft 112, the air flow speed in the driving motor 110 can be promoted without the need for external cooling. The temperature-reducing cooling device not only has a simple structure, but also reduces costs. It should be pointed out that the purpose of setting the cooling fan 170 is mainly to reduce the temperature inside the driving motor 110 , and it is not necessary to solve the problem of reducing the size of the whole machine.

Please refer to FIG. 2, specifically in this embodiment, the air inlet 122 is detachably installed with an air inlet pipe 1224, and the air inlet 122 is installed with a safety guard 1226, and the safety guard 1226 is pivotally Connect to the air inlet 122. The air inlet pipe 1224 is installed in the air inlet 122, mainly to facilitate the centralized absorption of external debris when the hand-held blower is in the suction state, so as to improve the dust collection efficiency. When the hand-held blower is in the blowing state, the air inlet pipe 1224 can be disassembled to reduce the weight of the whole machine and reduce the fatigue of the operator. At this time, the safety shield 1226 pivotally mounted on the air inlet 122 can be covered on the air inlet 122 to prevent debris from entering the casing 120 through the air inlet 122 and blowing out from the air outlet 124 to cause secondary pollution. It should be pointed out that the air inlet pipe and the safety guard are not necessary to solve the problem of reducing the size of the whole machine.

Please refer to FIG. 1 , specifically in this embodiment, a crushing blade 180 is provided on the end of the fan 120 away from the output shaft. The crushing blade 180 mainly works when the hand-held air blower is in the working mode of suction. When the external debris is sucked into the housing 120, the crushing blade 180 crushes the larger debris. The debris is more easily sucked into the dust bag, avoiding the fan from clogging and causing failure. It should be pointed out that the crushing blade is mainly for crushing larger debris and preventing the fan from clogging and causing failure, so it is not necessary to solve the problem of reducing the size of the whole machine.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (8)

1. a kind of Handheld blowing sucking machine, including motor and housing, the motor are fixed on the housing, are hand-held Blower provides power；The housing is provided with air inlet, air outlet, dust collecting opening and handle, it is characterised in that in the housing also Centrifugal fan is provided with, the output shaft of the centrifugal fan and the motor shaft of motor are connected by deceleration device, and The output shaft of the motor shaft of the motor and the centrifugal fan forms predetermined shaft angle；The air inlet is provided with guiding The direction of the air inlet is radially redirected direction, the air-out by portion, the guide part from the axial direction of centrifugal fan Mouthful and dust collecting opening be located at the radial direction of the centrifugal fan, directly connected with centrifugal fan, and the air inlet, go out The axle center of air port, dust collecting opening, handle and the centrifugal fan is on the same plane.

2. Handheld blowing sucking machine according to claim 1, it is characterised in that the deceleration device includes at least one pair of engagement Bevel gear.

3. Handheld blowing sucking machine according to claim 2, it is characterised in that the bevel gear causes the motor shaft and institute The predetermined shaft angle for stating the output shaft formation of centrifugal fan is 90 °.

4. Handheld blowing sucking machine according to claim 3, it is characterised in that the rotating speed of the centrifugal fan is more than every point 9000 turns of clock, the rotating speed of motor is more than 28000 turns per minute.

5. Handheld blowing sucking machine as claimed in any of claims 1 to 4, it is characterised in that the air outlet is provided with Pressure-vaccum quick change baffle plate, the pressure-vaccum quick change baffle plate is adjusted by the pressure-vaccum quick change knob outside housing.

6. Handheld blowing sucking machine according to claim 5, it is characterised in that the motor shaft sleeve of the motor is provided with cold But fan, cooling fan is driven by motor shaft and is rotated simultaneously with motor, accelerates the flowing velocity of air in motor, Reduce the temperature of motor.

7. Handheld blowing sucking machine according to claim 6, it is characterised in that the air inlet is removably provided with air intake Pipe, and the air inlet is provided with safety guard, the safety guard is pivotably connected to air inlet.

8. Handheld blowing sucking machine according to claim 7, it is characterised in that away from output shaft one on the centrifugal fan End is provided with Disintegrating knife.