CN109208518B

CN109208518B - Blowing and sucking machine

Info

Publication number: CN109208518B
Application number: CN201710517103.9A
Authority: CN
Inventors: 安德列·柴斯托那罗; 保罗·安德罗
Original assignee: Positec Power Tools Suzhou Co Ltd
Current assignee: Positec Power Tools Suzhou Co Ltd
Priority date: 2017-06-29
Filing date: 2017-06-29
Publication date: 2020-08-14
Anticipated expiration: 2037-06-29
Also published as: CN109208518A

Abstract

The invention relates to a blowing and sucking machine, comprising: the casing comprises a volute part and an air duct part, wherein the volute part is provided with a first air opening, and the air duct part is provided with a second air opening; the axial flow fan is arranged in the volute part; a motor; the bushing is provided with an internal air channel enabling the airflow to advance along a linear track, a communicating part is arranged on the wall of the bushing, and the bushing can be switched between a first position and a second position, wherein in the first position, the bushing enters the volute part and the axial flow fan is arranged in the circumferential direction, the communicating part is communicated with the internal channel and the first air port, and the axial flow fan rotates in the first direction; in the second position, the liner is retracted from the volute portion to the air channel portion, and the axial fan rotates in a second direction, the first direction being opposite to the second direction. By changing the position of the lining, the axial flow fan in the blowing mode is equivalently positioned in the straight pipe part, so that larger air inlet amount is ensured, and better blowing effect is realized; the axial flow fan is used as a centrifugal fan in the volute part in the suction mode, and has better adsorption force.

Description

Blowing and sucking machine

Technical Field

The invention relates to a power tool, in particular to a blowing and sucking machine.

Background

The blowing and sucking machine is a common electric tool for outdoor cleaning, and is mainly used for cleaning and collecting fallen leaves. The blowing and sucking machine blows leaves on the ground by blowing or sucks the leaves into the collecting bag by sucking.

The blowing and sucking machine needs to have blowing and sucking functions at the same time, and one traditional scheme is to adopt a centrifugal fan to realize blowing and sucking conversion by replacing pipes or switching double pipes. However, this solution makes the replacement of the tube cumbersome. Another way in the conventional art is: the blowing and sucking in same pipe is realized through the positive and negative rotation of the axial flow fan. However, this solution has the disadvantage of poor suction or suction performance.

Disclosure of Invention

Accordingly, it is necessary to provide a blower for blowing and sucking the same duct, in order to solve the problem that the suction performance is poor when the axial flow fan blows and sucks the same duct.

A suction machine comprising:

the casing comprises a volute part and an air duct part communicated with the volute part, wherein a first air port is formed in the volute part, and a second air port is formed in the air duct part;

the axial flow fan is arranged in the volute part;

the motor is used for driving the axial flow fan to work;

the bushing is movably arranged in the shell and provided with an internal air duct which enables airflow to advance along the direction far away from the volute part, a communication part which is communicated with the internal air duct and the outside is arranged on the wall of the bushing, the bushing can be switched between a first position and a second position, in the first position, the bushing enters the volute part and surrounds the axial flow fan in the circumferential direction, the communication part is communicated with the internal channel and a first air port, and the axial flow fan is driven by the motor to rotate in the first direction; in the second position, the liner is retracted from the volute portion to the air channel portion, and the axial fan is driven by the motor to rotate in a second direction, the first direction being opposite to the second direction.

In the blower, the axial flow fan is arranged in the volute part, but the axial flow fan is equivalently positioned in the straight pipe part under the blowing mode by changing the position of the lining, so that larger air inlet amount is ensured, and better blowing effect is realized; the axial flow fan is used as a centrifugal fan in the volute part in the suction mode, and has better adsorption force, so that the better performance in the blowing mode and the suction mode is ensured when the axial flow fan is used for blowing and sucking the same pipe.

In one embodiment, an operating member is disposed outside the air duct portion to move the bushing.

In one embodiment, the bushing has an operating portion passing through the air channel portion, and the operating portion is in sliding fit with a tube wall of the air channel portion.

In one embodiment, the end of the liner also abuts the inner wall of the volute section in the direction of liner movement when the liner is moved to its first position.

In one embodiment, a guide vane located between the second air opening and the axial flow fan is further arranged in the volute portion, when the axial flow fan is driven by the motor to rotate in the first direction, the guide vane does not rotate, the bushing covers the outer side of the guide vane, and when the axial flow fan is driven by the motor to rotate in the second direction, the guide vane rotates in the second direction.

In one embodiment, a motor shaft of the motor extends into the volute portion, the axial flow fan is mounted on the motor shaft, and the guide vane is matched with the motor shaft through a one-way bearing.

In one embodiment, a flow guide member is further disposed on an end portion of the motor shaft, and the flow guide member extends into the air duct portion.

In one embodiment, the movement direction of the bushing is coincident with or parallel to the axial direction of the motor.

In one embodiment, the air inlet direction of the second air port is along the axial direction of the motor, and the first air port is positioned at the bottom of the worm casing part.

In one embodiment, a flexible air pipe is connected to the second air port.

Drawings

FIG. 1 is a schematic view of a blow and suction machine according to an embodiment of the present invention in a blow mode;

FIG. 2 is a schematic view of a liner of the suction blower of FIG. 1 in a blowing mode;

FIG. 3 is a schematic view of a suction blower according to an embodiment of the present invention in a suction mode;

FIG. 4 is a schematic view of the liner of the suction machine of FIG. 3 in a suction mode;

fig. 5 is a side view of fig. 4.

The relevant elements in the figures are numbered correspondingly as follows:

100. the blowing and sucking machine 110, the casing 112 and the volute part

1123. First wind gap 114, wind channel portion 1143, second wind gap

1145. Flexible air pipe 120, motor 122 and motor shaft

130. Axial fan 140, bush 142, and communication part

150. Guide vane 160, flow guide

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The preferred embodiments of the blowing and sucking machine will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1 and 3, a blower 100 according to an embodiment of the present invention includes a casing 110, a motor 120, and an axial fan 130 disposed in the casing 110, wherein the motor 120 is configured to drive the axial fan 130 to operate.

The casing 110 includes a volute portion 112 and an air duct portion 114 communicating with the volute portion 112. The volute portion 112 has a first air port 1123, and the air channel portion 114 has a second air port 1143. The air passage in the volute section 112 is helical. The airflow follows a helical line within the volute section 112. Also disposed within the tunnel portion 114 is a liner 140, the liner 140 having an internal tunnel that advances the airflow in a straight or arcuate path. I.e., as the airflow passes through the liner 140, it follows a straight or arcuate path toward the intended target (i.e., the second ports 1143), as opposed to a curved flow path of the airflow within the volute section 112. For example, the liner 140 may have a cylindrical shape, or a rectangular parallelepiped shape, and the cross section of the inner air passage of the liner 140 has a circular or square shape.

The bushing 140 is movably disposed in the casing 110, and a communication portion 142 for communicating the internal air duct with the outside is disposed on a wall of the bushing 140. The liner 140 is convertible between a first position and a second position in the casing 110, wherein in the first position, as shown in fig. 1 and 2, one end of the liner 140 enters the volute 112 and surrounds the axial fan 130 in the circumferential direction, the communication portion 142 communicates the inner passage of the liner 140 with the first air opening 1123 of the volute 112, the axial fan 130 is driven by the motor 120 to rotate in a first direction, the rotation direction of the axial fan 130 is set to suck air from the first air opening 1123 and blow air from the second air opening 1143, and the blower/sucker 100 is in a blowing mode. At this time, the first air port 1123 is an air suction port, and the second air port 1143 is an air outlet.

Further, when the bush 140 is moved to its first position, the end of the bush 140 also abuts against the inner wall of the worm casing portion 112 in the moving direction of the bush 140. Thus, the liner 140 isolates the axial fan 130 from the internal air passage of the volute portion 112 in the circumferential direction, the inner wall of the volute portion 112 isolates the axial fan 130 from the internal air passage of the volute portion 112 from one side of the axial fan 130, the airflow entering from the first air opening 1123 can only enter the liner 140 from the communicating portion 142, the leakage is very small, and the air volume during blowing is ensured.

In the second position, as shown in fig. 3-5, the end of the liner 140 is retracted from the volute portion 112 to the air channel portion 114, at which time the axial fan 130 is driven by the motor 120 to rotate in a second direction, the first direction being opposite to the second direction. Since the axial flow fan 130 is rotated in the reverse direction as compared with the state shown in fig. 1, the suction/blowing machine 100 sucks air from the second port 1143 and blows air from the first port 1123, and the suction/blowing machine 100 is in the suction mode. At this time, the first air port 1123 is a dust outlet, and the second air port 1143 is a dust suction port.

The same blowing and sucking pipe can be successfully realized through the forward and reverse rotation of the axial flow fan 130, and the blowing and sucking conversion can be realized without replacing the pipe or switching double pipes. The volute is typically used with a centrifugal fan. Although the axial fan 130 is always located in the volute portion 112, in the blow-molded mode, the bushing 140 covers the exterior of the axial fan 130, so that the volute portion 112 fails, the axial fan 130 is located in a straight tube, and can be normally used as an axial fan, and the air sucked from the first air port 1123 flows through the bushing 140 along the axial direction of the motor 120 and then is blown out, so that a large air intake amount is ensured, and a good blowing effect is achieved. In the suction mode, the liner 140 is withdrawn from the volute portion 112, and the normal function of the volute portion 112 is not affected, and at this time, when the axial fan 130 is used as a centrifugal fan, the axial fan has a better suction force compared to the axial fan 130 if the suction mode is still performed in the air channel portion 114, so that the performance in both the blowing mode and the suction mode is ensured to be better when the axial fan 130 is used for blowing and sucking the same pipe.

The manner in which the bushing 140 is moved is various. For example, an operating member may be disposed outside the air duct portion 114 to move the bushing 140. For another example, the bushing may have an operating portion passing through the air channel portion 114, and the operating portion is slidably engaged with the tube wall of the air channel portion 114.

In one embodiment, the air inlet directions of the first air port 1123 and the second air port 1143 are perpendicular to each other, wherein the first air port 1123 is disposed at the bottom of the volute portion 112, the air inlet or outlet direction thereof is perpendicular to the axial direction of the motor 120, and the air inlet or outlet direction of the second air port 1143 is along the axial direction of the motor 120. Thus, in the blow molding mode, the air flow is discharged from the second air port 1143 along the axial direction of the motor 120, and in the suction mode, the dust collecting device can be connected below the volute portion 112, so that the blowing and suction operations are convenient, and the working efficiency is improved.

In addition, when the first air port 1123 is disposed at the bottom of the volute 112, the wind direction of the first air port 1123 and the wind direction of the second air port 1143 may be inclined. Further, a flexible air pipe 1145 is connected to the second air port 1143. In either the blowing or suction mode, the flexible duct 1145 can expand the working range. The first air port 1123 may be connected to a dust collecting device when in a suction mode to prevent dust from flying.

In one embodiment, the motor 120 is a counter-rotating motor and is capable of driving the axial fan 130 to rotate in a first direction or a second direction, and the first direction is opposite to the second direction. For example, if the first direction is clockwise when viewed from a certain angle, the axial fan 130 rotates clockwise when rotating in the first direction, the second direction is counterclockwise, and the axial fan 130 rotates counterclockwise when rotating in the second direction, and vice versa.

In one embodiment, the motor 120, the volute portion 112, and the air channel portion 114 are arranged in this order in the axial direction of the motor 120, and are configured in the simplest manner. For example, referring to fig. 1 or 3, the motor 120 is located at the rightmost side and the volute section 112 is located in the middle. Wherein the motor shaft 122 of the motor 120 extends into the volute portion 112 and into the air channel portion 114. The motor 120 is fixed to the volute section 112 from the right side; alternatively, the motor 120 is mounted in an external support housing that is fixedly connected to the volute section 112, or the external support housing and the volute section 112 together form the housing 110. In this manner, the bushing 140 moves in the axial direction of the motor 120 and also moves in the axial direction of the axial flow fan 130. Further, in the case where the motor 120 is placed on the rightmost side, the moving direction of the bushing 140 may be perpendicular to the axial direction of the motor 120. At this time, the motor shaft of the motor 120 may drive the axial flow fan 130 to operate through the speed reduction mechanism.

In addition, the motor 120 may also be offset and arranged side by side with the air duct portion 114, and the motor 120 drives the axial fan 130 and the guide vane 150 to rotate through a transmission mechanism such as a belt. At this time, the axial fan 130 and the bushing 140 move in a direction parallel to the axial direction of the motor 120.

In another embodiment, the suction blower 100 further includes a guide vane 150 disposed in the volute section 112 between the second port 1143 and the axial fan 130. The vanes 150 are selectively driven to rotate. Here, when the axial fan 130 is driven by the motor 120 to rotate in the first direction, i.e., in the blow-molded mode, the guide vane 150 does not rotate, and the liner 140 covers the outer side of the guide vane 150. When the axial fan 130 is driven to rotate in the second direction by the motor 120, i.e., in the suction mode, the guide vanes 150 are driven to rotate in the second direction.

The vanes 150 are coupled to the motor shaft 122 in a uni-directional drive manner, or to a drive shaft driven by the motor shaft 122. For example, the motor shaft 122 of the motor 120 extends into the volute section 112, the axial fan 130 is fixedly mounted on the motor shaft 122, and the guide vane 150 is engaged with the motor shaft 122 through a one-way bearing.

In addition, a flow guide 160 is disposed on the end of the motor shaft 122, and the flow guide 160 extends into the air duct portion 114. The end of the deflector 160 is arranged in a bullet shape, facilitating the entry of leaves in suction mode.

In addition, the guide vane 150 is a fan blade of a centrifugal fan and is disposed in the volute portion 112. In the suction mode, the guide vane 150 also functions as a centrifugal fan to improve suction performance, and the guide vane 150 also functions to crush leaves. In the blowing mode, the guide vanes 150 do not rotate, only the axial flow fan 130 operates, and the guide vanes 150 do not interfere with the normal blowing of the axial flow fan 130.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

The above embodiments only express a few embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A suction machine, comprising:

the axial flow fan is arranged in the volute part;

the motor is used for driving the axial flow fan to work;

2. The suction blower of claim 1, wherein an operating member is disposed outside the air channel portion to move the bushing.

3. The suction blower of claim 1, wherein the bushing has an operating portion that passes through the air channel portion, the operating portion being in sliding engagement with a wall of the air channel portion.

4. The suction blower of claim 1, wherein the bushing moves to its first position with the end of the bushing also abutting the inner wall of the volute section in the direction of movement of the bushing.

5. The suction blower of claim 1, further comprising a guide vane disposed between the second air opening and the axial fan, wherein the axial fan is driven by the motor to rotate in a first direction, the guide vane does not rotate, the bushing covers an outer side of the guide vane, and the axial fan is driven by the motor to rotate in a second direction, the guide vane rotates in the second direction.

6. The blowing and sucking machine of claim 5, wherein a motor shaft of the motor extends into the volute portion, the axial fan is mounted on the motor shaft, and the guide vane is engaged with the motor shaft through a one-way bearing.

7. The suction blower of claim 5, wherein a flow guide member is further disposed on an end of the motor shaft, and the flow guide member extends into the air channel portion.

8. The suction blower of claim 1, wherein the bushing moves in a direction that is coincident with or parallel to an axial direction of the motor.

9. The suction blower of claim 1, wherein the second port has an air inlet direction along the axial direction of the axial fan, and the first port is located at the bottom of the volute portion.

10. The suction blower of claim 1, wherein the second tuyere is connected with a flexible air pipe.