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Backpack-type air blower work machine

A working machine and knapsack technology, which is applied in the field of knapsack blower working machines, can solve the problems of difficult cleaning operation, easy tendency to the rear, troublesome battery charging operation, etc., and achieves the effect of improving work efficiency and convenience.

Inactive Publication Date: 2017-11-28
MAKITA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the operator carries the backpack frame of the backpack blower on the shoulder strap and uses it, the center of gravity of the backpack blower is at the rear, so it tends to lean backward, making it difficult to clean.
[0004] In addition, the above-mentioned battery that supplies power to the electric motor is fixed on the lower horizontal frame portion of the backpack frame by means of brackets and screws, and it is not considered that the battery needs to be frequently removed for charging.
Therefore, in order to charge the battery, the backpack blower must be transported to the vicinity of the power supply for charging, or the stand must be removed every time the battery is charged, and the battery charging work is troublesome.

Method used

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  • Backpack-type air blower work machine
  • Backpack-type air blower work machine
  • Backpack-type air blower work machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0034] Figure 1 ~ Figure 3The knapsack blower working machine 10 in the first embodiment shown includes: a knapsack frame 11 having a back plate portion 12 formed in a shape along the back of an operator; and a spiral casing. 21, the volute 21 is erected and assembled on the backpack frame 11 at the rear side of the back plate part 12; the centrifugal fan 22 is rotatably supported inside the volute 21; the motor 23 is the motor 23 Assembled in the volute 21 for rotating the centrifugal fan 22; four (multiple) battery packs 40 capable of recharging are detachably mounted on the backpack frame 11 on the lower side of the volute 21 and connected to the motor 23 ; and a control device 41 that controls the driving of the motor 23 and the power supply from the battery pack 40 . In the present embodiment, the center of gravity G of the backpack type blower working machine 10 is located below the rotation shaft (center axis) 22 a at the center of the centrifugal fan 22 when viewed f...

no. 2 Embodiment approach

[0048] exist Figure 4 ~ Figure 6 In the shown second embodiment of the present invention, a pair of front and rear volutes 21A, 21B are erected and assembled to the piggyback frame 11, and the pair of volutes 21A, 21B are internally provided with front and rear ones coaxially arranged. The pair of motors 23A, 23B drive the centrifugal fans 22A, 22B, respectively.

[0049] Such as Figure 4 As shown, a first motor 23A is integrally assembled behind the first volute 21A on the front side, and a first centrifugal fan 22A is rotatably attached to the output shaft of the first motor 23A inside the first volute 21A. 23Aa, thereby constituting the first blower unit 20A. Such as Figure 4 with Figure 5 As shown, the first volute 21A has an air intake port 21Aa on the front side, and has an air blowing tube portion 21Ab having a spiral outer tip portion on the right side. A second motor 23B is integrally assembled in front of the second volute 21B on the rear side, and a second ...

no. 3 Embodiment approach

[0059] exist Figure 8a , Figure 8b as well as Figure 9 The third embodiment of the present invention shown is characterized in that a first blower unit 20A and a second blower unit 20B are arranged vertically behind the back plate portion 12 . In the present embodiment, the first blower unit 20A and the second blower unit 20A are combined to balance the weight when the battery pack 40 described later is vertically arranged on the left side of the back plate portion 12 of the backpack frame 11 . The unit 20B is vertically arranged at a position deviated to the right from the center of the rear plate portion 12 in the left-right direction (see Figure 8b ).

[0060] Such as Figure 9 As shown, the first volute 21A on the upper side is integrally assembled with the first motor 23A on its front surface, and the first centrifugal fan 22A is rotatably attached to the output shaft 23Aa of the first motor 23A inside, thereby 20 A of 1st blowing units are comprised. Similarly,...

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PUM

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Abstract

A backpack-type air blower work machine is configured so that a volute case, which incorporates a centrifugal fan driven by an electric motor, is mounted in an upright position on a backpack frame, which is used while being carried on the back of a user by shoulder straps. A rechargeable battery pack connected to the electric motor is removably mounted to the backpack frame. The backpack-type air blower work machine is configured so that: the center of gravity of the backpack-type air blower work machine when the machine is viewed from the rear thereof is located below the rotation axis of the centrifugal fan; and the center of gravity of the backpack-type air blower work machine when the machine is viewed from a side thereof is located in front of the rear end of the volute case.

Description

technical field [0001] The present invention relates to a backpack-type blower machine used for cleaning debris such as fallen leaves and mowing grass, and more particularly relates to a backpack-type frame in which a volute incorporating a centrifugal fan driven by an electric motor is assembled. Backpack blower machine. Background technique [0002] In U.S. Patent No. 6,006,400, a knapsack blower is disclosed. The knapsack blower includes: a volute, which is mounted on an L-shaped knapsack frame that can be carried by an operator; a centrifugal fan, the A centrifugal fan is rotatably supported in the volute; a motor is mounted on the rear side of the volute to rotate the centrifugal fan; and a battery is installed in the lower horizontal frame of the piggyback frame. In this knapsack blower, the centrifugal fan in the volute is rotated by power supply from the battery and the motor is operated, and the air sucked into the volute is blown out from the discharge port of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01H1/08F04D25/08
CPCA01G20/47E01H1/0809F04D25/0673F04D25/08
Inventor 高桥诚田中刚松野匡辅
Owner MAKITA CORP