Handheld blowing and sucking dual-purpose electric tool

Abstract

The utility model provides a handheld blowing and sucking dual-purpose electric tool which solves the problem that an existing dust remover is inconvenient to operate. The handheld blowing and sucking dual-purpose electric tool comprises a machine barrel and a duct motor fixed in the machine barrel, a front end opening and a rear end opening of the machine barrel are an air inlet and an air outlet respectively, a dust collection barrel is sleeved and fixed at the front end of the machine barrel, a filter element enabling an inner cavity of the dust collection barrel to be communicated with the air inlet is fixed in the rear end of the dust collection barrel, and the front end of the dust collection barrel is in a necking shape. The dust collection cylinder extends backwards from the front end opening of the dust collection cylinder to form an air inlet pipe coaxial with the dust collection cylinder, a one-way mechanism enabling the air inlet pipe and an inner cavity of the dust collection cylinder to be in one-way communication is arranged in the air inlet pipe, the communication direction of the one-way mechanism is from front to back, and the one-way mechanism is started through negative pressure formed in the dust collection cylinder. The handheld blowing and sucking dual-purpose electric tool is convenient to operate.

Description

Technical Field

[0001] This utility model relates to an electric tool, and more particularly to a handheld electric tool that can be used for both blowing and suction. Background Technology

[0002] Handheld blower / vacuum power tools are multi-functional power tools that combine blower and vacuuming functions, making them suitable for a variety of scenarios.

[0003] Existing handheld blower / vacuum dual-purpose power tools, such as the integrated vacuum and blower dust collector disclosed in the Chinese Patent Database (application number: 201310084189.2), include a dust collection chamber, a filter, an air pressure chamber, and a motor. The air pressure chamber is placed between the dust collection chamber and the blower box. The fan blades mounted on the motor shaft are placed inside the air pressure chamber, and the motor is mounted on the outer shell of the air pressure chamber. The dust collection chamber has an air inlet. The blower box has an auxiliary air outlet and an exhaust outlet.

[0004] In the dust collectors mentioned above, the air inlet is directly connected to the dust collection bin and the two are arranged in a straight line. This design makes it easy for impurities in the dust collection bin to be discharged through the air inlet. Therefore, in actual use, a manual plug is usually installed to control the opening and closing of the air inlet, which is inconvenient to operate. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a convenient handheld electric tool that can be used for both blowing and suction.

[0006] The purpose of this utility model can be achieved through the following technical solution: A handheld blower and suction dual-purpose electric tool, including a barrel and a ducted motor fixed inside the barrel. The front and rear ports of the barrel are respectively the air inlet and air outlet. A dust collection cylinder is sleeved and fixed at the front end of the barrel. A filter element is fixed inside the rear end of the dust collection cylinder to connect its inner cavity with the air inlet. The dust collection cylinder is characterized in that the front end of the dust collection cylinder is constricted, and the dust collection cylinder extends backward from its front port to form an air inlet pipe coaxial with the dust collection cylinder. The air inlet pipe is provided with a one-way mechanism that enables one-way communication between the air inlet pipe and the inner cavity of the dust collection cylinder. The direction of the one-way mechanism is from front to back, and the one-way mechanism is opened by negative pressure formed inside the dust collection cylinder.

[0007] When in use, the duct motor runs to create a negative pressure inside the dust collection cylinder. At this time, the one-way mechanism is in the open state, and the external gas is drawn into the dust collection cylinder through the air inlet pipe. Under the filtration of the filter element, dust and other impurities are retained in the dust collection cylinder, and the clean gas passes through the duct motor and is finally discharged through the air outlet.

[0008] A one-way mechanism is installed inside the air inlet pipe to allow it to flow unidirectionally from front to back. This allows the air inlet pipe to be automatically opened when the duct motor is running and automatically cut off when the duct motor stops. In actual use, there is no need to manually open and close the air inlet of the dust collection cylinder as in existing technologies, which has the advantages of being convenient and easy to use.

[0009] In the aforementioned handheld blower / vacuum power tool, the one-way mechanism includes a sealing plate made of elastic material. The sealing plate consists of a base and a plate body distributed along its length. A straight groove is formed at the connection between the base and the plate body, extending through the width of the sealing plate. The base body is fixed to the air inlet pipe, and the plate body isolates the air inlet pipe from the dust collection cylinder. Under negative pressure within the dust collection cylinder, the plate body can overcome its own elasticity and swing backward, connecting the inner cavity of the dust collection cylinder and the air inlet pipe. The one-way mechanism, using only a sealing plate made of elastic material, has advantages such as simple structure, stable operation, and convenient assembly.

[0010] In the aforementioned handheld blower / vacuum power tool, the front end of the dust collection cylinder extends rearward to form a block, and a positioning groove with a length extending front-to-back is formed between the outer wall of the air inlet pipe and the block. The front side of the base has a positioning block that matches the positioning groove, and the positioning block is locked in the positioning groove. The positioning sealing plate is positioned by the positioning block and the positioning groove being locked together, making assembly relatively convenient.

[0011] In the aforementioned handheld blower / vacuum power tool, an annular sealing seat is formed on the inner wall of the air inlet pipe at its rear end. The plate body is attached to the rear end face of the sealing seat to separate the air inlet pipe from the dust collection cylinder, and a notch is provided on the side wall of the air inlet pipe for the plate body to extend into the air inlet pipe. This design allows the plate body to stably seal the rear end of the sealing seat, ensuring stable operation of the power tool.

[0012] In the aforementioned handheld blower and suction power tool, the cross-section of the positioning groove is arc-shaped, and the positioning groove and the air inlet pipe are coaxially arranged to increase the contact area between the positioning block and the positioning groove, so as to stably position the sealing plate.

[0013] In the aforementioned handheld blower / vacuum power tool, a strip-shaped protrusion is formed on the rear side of the base, and the length of the protrusion extends along the width direction of the sealing plate. The protrusion is provided to facilitate the insertion and removal of the sealing plate via a gripping point.

[0014] As an alternative, in the aforementioned handheld blower and suction power tool, the one-way mechanism is a duckbill valve, one end of which is an annular flange coaxial with the air inlet pipe, and the annular flange is fixed to the rear end of the air inlet pipe.

[0015] In the aforementioned handheld blower and suction power tools, the sealing plate is a one-piece plastic component, which has the advantages of stable operation and low cost.

[0016] Compared with existing technologies, this handheld blower / vacuum power tool has the following advantages:

[0017] 1. A one-way mechanism is installed in the air inlet pipe to allow it to flow unidirectionally from front to back, so that the air inlet pipe is automatically opened when the duct motor is running and automatically cut off when the duct motor stops. In actual use, there is no need to manually open and close the air inlet of the dust collection cylinder as in existing technologies, which has the advantages of being convenient and easy to use.

[0018] 2. The one-way mechanism uses only a sealing plate made of elastic material, which has the advantages of simple structure, stable operation and convenient assembly. Attached Figure Description

[0019] Figure 1 This is a 3D schematic diagram of this handheld blower / vacuum power tool.

[0020] Figure 2 This is a cross-sectional schematic diagram of this handheld blower / vacuum power tool.

[0021] Figure 3 This is a three-dimensional schematic diagram of the sealing plate.

[0022] In the diagram, 1 is the barrel; 2 is the ducted motor; 3 is the dust collection cylinder; 3a is the air inlet pipe; 3b is the block; 3c is the positioning groove; 3d is the sealing seat; 4 is the filter element; 4a is the mounting base; 5 is the sealing plate; 5a is the seat body; 5b is the plate body; 5c is the straight groove; 5d is the positioning block; and 5e is the protrusion. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, this handheld blower and suction power tool includes a barrel 1 and a ducted motor 2 fixed inside the barrel 1.

[0026] The front and rear ports of the casing 1 are the air inlet and air outlet, respectively. A dust collection cylinder 3 is fitted and fixed to the front end of the casing 1. The dust collection cylinder 3 and the casing 1 are coaxially arranged, and a filter element 4 is fixed inside the rear end of the dust collection cylinder 3 to connect its inner cavity to the air inlet.

[0027] In this embodiment, the dust collection cylinder 3 and the machine cylinder 1 are detachably fixed together, and preferably the dust collection cylinder 3 and the machine cylinder 1 are detachably fixed together by a snap fastener. The filter element 4 includes an annular mounting base 4a, which is coaxially arranged with the dust collection cylinder 3, and the mounting base 4a is clamped and positioned between the inner wall of the machine cylinder 1 and the dust collection cylinder 3 to facilitate the replacement of the filter element 4.

[0028] like Figure 2As shown, the front end of the dust collection cylinder 3 is constricted, and the dust collection cylinder 3 extends rearward from its front end to form an air inlet pipe 3a coaxial with the dust collection cylinder 3. The air inlet pipe 3a is provided with a one-way mechanism that allows one-way communication between the air inlet pipe 3a and the inner cavity of the dust collection cylinder 3. The direction of communication of the one-way mechanism is from front to back, and the one-way mechanism is opened by the negative pressure formed inside the dust collection cylinder 3.

[0029] When in use, the duct motor 2 operates to create a negative pressure inside the dust collection cylinder 3. At this time, the one-way mechanism is in the open state. External gas is drawn into the dust collection cylinder 3 through the air inlet pipe 3a and filtered by the filter element 4. Dust and other impurities are retained in the dust collection cylinder 3, and clean gas is discharged through the air outlet after passing through the duct motor 2.

[0030] A one-way mechanism is installed in the air inlet pipe 3a to allow it to flow unidirectionally from front to back, so that the air inlet pipe 3a is automatically opened when the duct motor 2 is running and automatically cut off when the duct motor 2 stops. In actual use, it is not necessary to manually open and close the air inlet of the dust collection cylinder 3 as in the existing technology, which has the advantages of being convenient and easy to use.

[0031] In this embodiment,

[0032] like Figure 2 and Figure 3 As shown, the one-way mechanism includes a sealing plate 5 made of elastic material. The sealing plate 5 consists of a seat 5a and a plate 5b distributed along the length of the sealing plate 5. A straight groove 5c is provided at the connection between the seat 5a and the plate 5b along the width of the sealing plate 5 to make the swing of the plate 5b relative to the seat 5a smoother. The seat 5a is fixed to the air inlet pipe 3a; the plate 5b is used to isolate the air inlet pipe 3a and the dust collection cylinder 3. Under the negative pressure in the dust collection cylinder 3, the plate 5b can overcome its own elasticity and swing backward to connect the inner cavity of the dust collection cylinder 3 and the air inlet pipe 3a. The one-way mechanism uses only a sealing plate 5 made of elastic material, which has the advantages of simple structure, stable operation, and convenient assembly.

[0033] in,

[0034] The elastic material can be plastic, spring steel, silicone, etc., and the sealing plate 5 is preferably a one-piece plastic component, which has the advantages of stable operation and low cost.

[0035] The positioning method of the seat 5a is as follows: the front end of the dust collection cylinder 3 extends rearward to form a block 3b, which is located outside the air inlet pipe 3a and is directly opposite to it. A positioning groove 3c with a front-to-back extension is formed between the outer wall of the air inlet pipe 3a and the block 3b. The front side of the seat 5a has a positioning block 5d that matches the positioning groove 3c, and the positioning block 5d is engaged in the positioning groove 3c. The sealing plate 5 is positioned by the positioning block 5d engaging with the positioning groove 3c, which makes assembly relatively convenient. Preferably, both sides of the block 3b extend to the block 3b to completely close the outer wall of the positioning groove 3c. Further, the cross-section of the positioning groove 3c is arc-shaped, and the positioning groove 3c and the air inlet pipe 3a are coaxially arranged to increase the contact area between the positioning block 5d and the positioning groove 3c, so as to stably position the sealing plate 5. A strip-shaped protrusion 5e is formed on the rear side of the seat 5a, and the length of the protrusion 5e extends along the width direction of the sealing plate 5. A protrusion 5e is provided to facilitate the insertion and removal of the sealing plate 5 via a gripping point.

[0036] The plate 5b separates the air inlet pipe 3a and the dust collection cylinder 3 as follows: An annular sealing seat 3d is formed on the inner wall of the air inlet pipe 3a at its rear end, and the sealing seat 3d and the air inlet pipe 3a are coaxially arranged. The plate 5b separates the air inlet pipe 3a and the dust collection cylinder 3 by affixing it to the rear end face of the sealing seat 3d, and a notch is provided on the side wall of the air inlet pipe 3a for the plate 5b to extend into it. This design allows the plate 5b to stably seal the rear end of the sealing seat 3d, ensuring stable operation of the power tool.

[0037] In the actual product, the duct motor 2 is a brushless motor, and the outer diameter of the fan blade of the duct motor 2 is 10mm to 300mm. A handle is formed on the lower side of the barrel 1.

[0038] Example 2

[0039] The structure and principle of this embodiment are basically the same as those of embodiment one. The difference is that the one-way mechanism is a duckbill valve, one end of which is an annular flange coaxial with the intake pipe 3a, and the annular flange is fixed to the rear end of the intake pipe 3a.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A handheld blower / vacuum dual-purpose electric tool, comprising a barrel (1) and a ducted motor (2) fixed inside the barrel (1), wherein the front and rear ports of the barrel (1) are respectively an air inlet and an air outlet, a dust collection cylinder (3) is sleeved and fixed to the front end of the barrel (1), and a filter element (4) is fixed inside the rear end of the dust collection cylinder (3) to connect its inner cavity to the air inlet, characterized in that, The front end of the dust collection cylinder (3) is constricted, and the dust collection cylinder (3) extends backward from its front end to form an air inlet pipe (3a) coaxial with the dust collection cylinder (3). The air inlet pipe (3a) is provided with a one-way mechanism that allows the air inlet pipe (3a) and the inner cavity of the dust collection cylinder (3) to communicate unidirectionally. The direction of the one-way mechanism is from front to back, and the one-way mechanism is opened by the negative pressure formed in the dust collection cylinder (3).

2. The handheld blower / vacuum power tool according to claim 1, characterized in that, The aforementioned one-way mechanism includes a sealing plate (5) made of elastic material. The sealing plate (5) is composed of a seat (5a) and a plate (5b) distributed along the length of the sealing plate (5). A straight groove (5c) is provided through the connection between the seat (5a) and the plate (5b) along the width of the sealing plate (5). The seat (5a) is fixed to the air inlet pipe (3a). The plate (5b) is used to separate the air inlet pipe (3a) and the dust collection cylinder (3). Under the negative pressure inside the dust collection cylinder (3), the plate (5b) can overcome its own elasticity and swing backward to connect the inner cavity of the dust collection cylinder (3) and the air inlet pipe (3a).

3. The handheld blower / vacuum power tool according to claim 2, characterized in that, The front end of the dust collection tube (3) extends backward to form a block (3b), and a positioning groove (3c) with a length extending forward and backward is formed between the outer wall of the air inlet pipe (3a) and the block (3b). The front side of the seat (5a) is a positioning block (5d) that matches the positioning groove (3c), and the positioning block (5d) is stuck in the positioning groove (3c).

4. The handheld blower / vacuum power tool according to claim 3, characterized in that, An annular sealing seat (3d) is formed on the inner wall of the air intake pipe (3a) at its rear end. The plate (5b) is attached to the rear end face of the sealing seat (3d) to separate the air intake pipe (3a) and the dust collection cylinder (3). The side wall of the air intake pipe (3a) is provided with a notch for the plate (5b) to extend into the air intake pipe (3a).

5. The handheld blower / vacuum power tool according to claim 3 or 4, characterized in that, The positioning groove (3c) has a circular arc cross-section, and the positioning groove (3c) and the air intake pipe (3a) are coaxially arranged.

6. The handheld blower / vacuum power tool according to claim 3 or 4, characterized in that, A strip-shaped protrusion (5e) is formed on the rear side of the seat (5a), and the length of the protrusion (5e) extends along the width direction of the sealing plate (5).

7. The handheld blower / vacuum power tool according to claim 1, characterized in that, The one-way mechanism is a duckbill valve, one end of which is an annular flange coaxial with the air intake pipe (3a), and the annular flange is fixed to the rear end of the air intake pipe (3a).

8. The handheld blower / vacuum power tool according to claim 2, characterized in that, The sealing plate (5) is a single piece of plastic.

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