An electric tool with a dust-proof function

Abstract

An electric tool with a dust-proof function disclosed by the present invention includes: a housing, the housing is provided with a rear cover; a dust-proof device, the dust-proof device is arranged at the end of the housing; a filter screen, arranged at the tail of the housing. For this electric tool with a dust-proof function, through the tangential first air hole design, the air entering the dust-proof device can generate a cyclone phenomenon. This cyclone can drive the accumulated dust and dirt to move and rotate, can avoid the dust and dirt or fibers from blocking the second air hole, and can ensure stable operation for a long time. Moreover, for the air inlet cyclone dust-proof device of this electric tool, by setting a metal dust filter cover and filter cotton, the dust and dirt and fibers can be filtered more thoroughly, and the filtering effect is excellent.

Description

Technical Field

[0001] The present invention relates to the technical field of power tools, and particularly relates to a power tool base with a dust-proof function. Background Art

[0002] When a power tool is working, its motor will generate heat. Therefore, a heat dissipation device such as a fan is required to dissipate the heat. An air inlet for sucking in outside air to lower the temperature of the motor will inevitably be provided on the housing of the power tool. Taking a angle grinder as an example, the width of its air inlet is generally not less than 3 mm. However, power tools are often used in a closed space with a large density of dust and powder. In this way, these impurities will enter the tool through the air inlet. After a long time, the machine will inevitably fail. Therefore, for power tools, they must have a certain dust-proof ability. Therefore, it is necessary to make improvements and innovations. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to solve the problem of air suction and heat dissipation of power tools in a dusty environment, filter and remove dust from the air inhaled by the power tools, and avoid poor heat dissipation and circuit failures caused by dust and fibers entering the body.

[0004] The present invention discloses a power tool with a dust-proof function, including:

[0005] A housing, the housing is provided with a rear cover;

[0006] A dust-proof device, the dust-proof device is arranged at the end of the housing;

[0007] A filter screen, arranged at the tail of the housing.

[0008] In some embodiments, the rear cover is fixedly connected to the housing through a rear cover fixing ring.

[0009] In some embodiments, the dust-proof device includes a first circular straight section extending outward from the housing, a cover body threadedly engaged with the circular straight section, and a plurality of equally spaced first air holes are provided on the circumferential side of the cover body; the housing has a hollow cylindrical air inlet cylinder protruding outward at the position of the center of the circular straight section. A filter cotton is sleeved on the outer wall of the air inlet cylinder, and a metal dust filter cover is arranged outside the air inlet cylinder; the left side of the dust filter cover is detachably and airtightly connected to the housing, and the right side seals the right end of the air inlet cylinder.

[0010] In some embodiments, the metal dust filter cover is frustum-shaped, its left end is an open second circular straight section, an elastic clamping groove is provided on the housing, and the second circular straight section is airtightly engaged with the elastic clamping groove. Second air holes are evenly distributed on the conical wall of the metal dust filter cover.

[0011] In some embodiments, a raised annular retaining ring is connected to the outer edge of the right inner wall of the metal dust filter cover in contact with the air inlet cylinder, and the outer wall of the air inlet cylinder is airtight and fitted to the inner wall of the retaining ring.

[0012] In some embodiments, a spring pressure rod is provided on the cover corresponding to the right outer wall of the metal dust filter cover. The left side of the spring pressure rod is connected to an elastic gasket. When the cover is screwed with the first circular straight section, the elastic gasket presses the metal dust filter cover.

[0013] In some embodiments, the first air holes are elongated, with an opening width of 2.5 mm - 3.5 mm. The opening direction of the first air holes is on the tangent line of the circumferential side surface of the cover, and all the opening directions of the first air holes are the same.

[0014] In some embodiments, third air holes are evenly distributed on the circumferential side of the air inlet cylinder. The diameter of the second air holes is 0.2 mm - 0.5 mm, and the diameter of the third air holes is 0.5 mm - 0.8 mm.

[0015] In some embodiments, the filter cotton is polyurethane filter foam, with a thickness of 15 mm - 25 mm and a pore size of 25 - 30 PPI.

[0016] Beneficial effects:

[0017] (1) For the electric tool with a dust-proof function of the present invention, through the tangential first air hole design, the air entering the dust-proof device can generate a cyclone phenomenon. This cyclone can drive the accumulated dust and dirt to move and rotate, which can prevent the dust and dirt or fibers from blocking the second air holes and ensure stable operation for a long time.

[0018] (2) For the air inlet cyclone dust-proof device of the electric tool with a dust-proof function of the present invention, by setting the metal dust filter cover and the filter cotton, the dust and fibers can be filtered more thoroughly, and the filtering effect is excellent. Description of the drawings

[0019] Figure 1 It is a schematic structural diagram of an electric tool with a dust-proof function in an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of an electric tool with a dust-proof function in an embodiment of the present invention;

[0021] Figure 3 It is a schematic partial structural diagram of an electric tool with a dust-proof function in an embodiment of the present invention. Detailed implementation manners

[0022] The present invention will be further described in detail below with reference to the accompanying drawings of the specification.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0024] As Figures 1 to 3 shown:

[0025] An electric tool with a dust-proof function, comprising:

[0026] A housing 100, the housing 100 is provided with a rear cover 400;

[0027] A dust-proof device 200, the dust-proof device 200 is arranged at the end of the housing 100;

[0028] A filter screen 600 is arranged at the tail of the housing 100.

[0029] Furthermore, the rear cover 400 and the housing 100 are fixedly connected through a rear cover fixing ring 500.

[0030] Furthermore, the dust-proof device 200 includes a first circular straight section 101 extending outward from the housing 100, a cover body 200 threadedly engaged with the circular straight section 101, and a plurality of equally spaced first air holes 201 are formed on the circumferential side of the cover body 200; at the position of the center of the circular straight section 101 of the housing 100, there is a hollow cylindrical air inlet cylinder 103 protruding outward, a filter cotton 104 is sleeved on the outer wall of the air inlet cylinder 103, and a metal dust filter cover 300 is arranged outside the air inlet cylinder 103; the left side of the dust filter cover 300 is detachably and airtight connected to the housing 100, and the right side seals the right end of the air inlet cylinder 103.

[0031] Furthermore, the metal dust filter cover 300 is frustum-shaped, its left end is an open second circular straight section 301, the housing 100 is provided with an elastic clamping groove 102, the second circular straight section 301 is airtight and engaged with the elastic clamping groove 102, and second air holes are evenly distributed on the conical wall of the metal dust filter cover 300.

[0032] Furthermore, a protruding annular retaining ring 302 is connected to the outer edge of the inner wall of the right side of the metal dust filter cover 300 in contact with the air inlet cylinder 103, and the outer wall of the air inlet cylinder 103 is airtight and fitted with the inner wall of the retaining ring 302.

[0033] Further, a spring pressure rod 202 is provided at the right outer wall of the cover body 200 corresponding to the metal dust filter 300. The left side of the spring pressure rod 202 is connected to an elastic gasket 203. When the cover body 200 is screwed with the first circular straight section 101, the elastic gasket 203 presses the metal dust filter 300 tightly.

[0034] Further, the first air hole 201 is strip-shaped, and its opening width is 2.5 mm - 3.5 mm. The opening direction of the first air hole 201 is on the tangent line of the circumferential side surface of the cover body 200, and the opening directions of all the first air holes 201 are the same.

[0035] The above design of the direction of the first air hole 201 can cause the air entering the dust prevention device to generate a cyclone phenomenon. This cyclone can drive the accumulated dust and dirt to move and rotate, and can prevent the dust and dirt or fibers from blocking the second air hole.

[0036] Further, the third air holes are evenly distributed on the circumferential side of the air inlet cylinder 103. The diameter of the second air hole is 0.2 mm - 0.5 mm, and the diameter of the third air hole is 0.5 mm - 0.8 mm.

[0037] Further, the filter cotton 104 is a polyurethane filter foam, with a thickness of 15 mm - 25 mm and a pore size of 25 - 30 PPI.

[0038] The electric tool with a dust prevention function according to the embodiment of the present invention, through the tangential first air hole design, can cause the air entering the dust prevention device to generate a cyclone phenomenon. This cyclone can drive the accumulated dust and dirt to move and rotate, can prevent the dust and dirt or fibers from blocking the second air hole, and can ensure stable operation for a long time. Moreover, the air inlet cyclone dust prevention device of the electric tool can filter dust and fibers more thoroughly by setting a metal dust filter and filter cotton, and the filtering effect is excellent.

[0039] The above description is only the preferred mode of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the creative concept of the present invention, several deformations and improvements can still be made, and these should also be regarded as within the protection scope of the present invention.

Claims

1. An electric tool with a dust-proof function, characterized in that, Comprising: A housing (100) provided with a rear cover (400); a dust-proof device (200) disposed at an end of the housing (100); a filter net (600) disposed at the tail of the housing (100); the dust-proof device (200) includes a first circular straight section (101) extending outward from the housing (100), a cover body (200) threadedly engaged with the circular straight section (101), and a plurality of equally spaced first air holes (201) are formed on the circumferential side of the cover body (200); at the position of the center of the circular straight section (101) of the housing (100), there is a hollow cylindrical air inlet cylinder (103) protruding outward, a filter cotton (104) is sleeved on the outer wall of the air inlet cylinder (103), and a metal dust filter cover (300) is disposed outside the air inlet cylinder (103); the left side of the dust filter cover (300) is detachably and airtightly connected to the housing (100), and the right side plugs the right end of the air inlet cylinder (103).

2. The electric tool with a dust-proof function according to claim 1, characterized in that, The rear cover (400) is fixedly connected to the housing (100) through a rear cover fixing ring (500).

3. The electric tool with a dust-proof function according to claim 1, characterized in that, The metal dust filter cover (300) is frustum-shaped, its left end is an open second circular straight section (301), an elastic clamping groove (102) is provided on the housing (100), and the second circular straight section (301) is airtightly engaged with the elastic clamping groove (102), and second air holes are evenly distributed on the conical wall of the metal dust filter cover (300).

4. The electric tool with a dust-proof function according to claim 1, characterized in that: A protruding annular retaining ring (302) is connected to the outer edge of the inner wall of the right side of the metal dust filter cover (300) in contact with the air inlet cylinder (103), and the outer wall of the air inlet cylinder (103) is airtightly attached to the inner wall of the retaining ring (302).

5. An electric tool with a dust-proof function according to claim 1, characterized in that: A spring pressure rod (202) is provided on the cover body (200) corresponding to the outer wall of the right side of the metal dust filter cover (300), and an elastic gasket (203) is connected to the left side of the spring pressure rod (202). When the cover body (200) is screwed with the first circular straight section (101), the elastic gasket (203) presses the metal dust filter cover (300).

6. The electric tool with a dust-proof function according to claim 1, characterized in that: The first air hole (201) is strip-shaped, its opening width is 2.5 mm - 3.5 mm, the opening direction of the first air hole (201) is on the tangent of the circumferential side of the cover body (200), and the opening directions of all the first air holes (201) are the same.

7. An electric tool with a dust-proof function according to claim 3, characterized in that: Third air holes are evenly distributed on the circumferential side of the air inlet cylinder (103), the diameter of the second air hole is 0.2 mm - 0.5 mm, and the diameter of the third air hole is 0.5 mm - 0.8 mm.

8. An electric tool with a dust-proof function according to claim 1, characterized in that: The filter cotton (104) is a polyurethane filter foam, its thickness is 15 mm - 25 mm, and the pore diameter is 25 - 30 PPI.

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