CN214265918U - Hand-held electric circular saw - Google Patents

Abstract

The utility model discloses a hand-held type electric circular saw, including handle, casing, motor, fan, middle lid, first shell, bottom plate, saw bit, drive mechanism, the terminal surface correspondence of fan is equipped with first dust groove and second dust groove, and the middle correspondence of covering is equipped with first dust ring and second dust ring, and first dust ring and second dust ring and relative first dust groove and second dust groove intercrossing cooperate, make first dust ring and first dust groove, second dust ring and second dust groove become two labyrinth dustproof construction, be equipped with the air exit corresponding with the fan between casing and middle lid, be equipped with the wind-guiding separation blade that changes air exit air-out direction on the handle, make the cooling wind redirecting blow to the casing. After adopting above-mentioned structure, have simple structure reasonable, operation convenient to use, dustproof radiating effect is good, job stabilization is reliable, long service life's advantage.

Description

Hand-held electric circular saw

Technical Field

The utility model relates to an electric cutting tool technical field, especially a dustproof good hand-held type electric circular saw of radiating effect.

Background

The handheld electric circular saw is an electric cutting tool, is mainly used for wood cutting and non-metallic material processing, has the characteristics of simple operation, convenient use, high cutting speed, high working efficiency, low labor intensity and the like, is deeply loved by the majority of users, and is widely applied to various industries. However, the existing handheld electric circular saw has the following defects in the production and use processes: firstly because carpenter's class electric tool sealing performance is poor, the sawdust that produces when electric circular saw cutting timber and non-metallic material can follow the air exit and get into, leads to the stifled dead motor fore bearing of sawdust, shortens fore bearing life, can cause the motor to stall when serious and burn out. Secondly, because the cooling air of the motor directly exhausts the air from the air outlet, the sawdust flies disorderly, and the working environment is extremely poor. Thirdly, the force application is inconvenient when the motor is operated by a single hand, and the heat dissipation effect of the motor still needs to be further improved and improved. Aiming at the problems, many manufacturers and acquaintances develop and develop the products, but no ideal products are seen.

Disclosure of Invention

In order to overcome the problems existing in the prior art, the utility model aims to provide a handheld electric circular saw which has the advantages of simple and reasonable structure, convenient operation and use, good dustproof heat dissipation effect, stable and reliable work and long service life.

The utility model provides a technical scheme that above-mentioned technical problem adopted, it includes handle, casing, motor, fan, middle lid, head shell, bottom plate, saw bit, drive mechanism, and the motor output shaft of motor passes through around the motor bearing rotationally sets up and covers in the back shroud of casing and centre, the terminal surface correspondence of fan is equipped with first dust groove and second dust groove, and the centre is covered and is corresponded and be equipped with first dust ring and the first dust ring of second dust ring and relative first dust groove and second dust groove intercrossing cooperation, makes first dust ring and first dust groove, second dust ring and second dust groove form two labyrinth dustproof construction, is equipped with the air exit corresponding with the fan between casing and middle lid, is equipped with the separation blade that changes the mouth air-out direction on the handle, makes the cooling wind redirecting exhaust to the casing.

The utility model discloses a further scheme, the head shell on be fixed with the protecgulum and constitute transmission box body with middle lid together, drive mechanism includes drive gear, power output shaft rotationally sets up between middle lid and protecgulum, drive gear fix on power output shaft and with the epaxial gear engagement of motor output, the saw bit passes through the clamp plate to be fixed on power output shaft.

The utility model discloses a further scheme, the head shell on be fixed with the fixed guard shield of shroud on the saw bit, automatic closed activity guard shield when installing the cutting when automatic opening, not cutting between head shell and the fixed guard shield.

In a further aspect of the present invention, the handle is provided with a power switch and a thumb pushing block for facilitating the force application operation.

The utility model discloses a further scheme, middle lid, head shell and protecgulum form by aluminum alloy processing.

After adopting above-mentioned structure, compare with prior art and have following advantage: firstly, because first dust ring and first dust groove, second dust ring and the dustproof flute profile of second form two labyrinth dustproof construction, make the dust or the foreign matter that are close the fore bearing thrown away, can't get into the fore bearing at all, guaranteed the lubricated effect and the life of fore bearing. Secondly, because the handle is provided with the wind guide blocking piece for changing the air outlet direction of the air outlet, the cooling air is blown to the shell in the changed direction, the temperature of the shell can be reduced by using the cooling air, the rear row of the cooling air can be ensured not to blow saw dust, and the working environment is effectively improved. Thirdly, the handle is provided with a thumb pushing block which is convenient for stress application operation, so that the handle is convenient to operate and use. Fourthly, because the middle cover, the head shell and the front cover are formed by processing aluminum alloy, the mechanical property and the heat dissipation effect can be improved, the deformation of the bearing chamber caused by overhigh temperature can not be caused, and the stable and reliable sawing operation can be ensured.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a schematic view of the cross-sectional structure a-a of fig. 1 according to the present invention.

Fig. 4 is a schematic perspective view of the handle of the present invention.

The automatic dust removal device comprises a handle 1, a thumb push block 2, a power switch 3, a fixed shield 4, a saw blade 5, a movable shield 6, a bottom plate 7, a middle cover 8, a wind guide baffle 9, a machine shell 10, an exhaust outlet 11, a fan 12, a motor 13, a second dust-proof groove 14, a second dust-proof ring 15, a first dust-proof groove 16, a first dust-proof ring 17, a motor output shaft 18, a power output shaft 19, a driving gear 20, a head shell 21 and a front cover 22.

Detailed Description

Fig. 1 to 4 show a specific embodiment of a hand-held electric circular saw according to the present invention, which comprises a handle 1, a housing 10, a motor 13, a fan 12, a middle cover 8, a head housing 21, a bottom plate 7, a saw blade 5, and a transmission mechanism, wherein a motor output shaft 18 of the motor 13 is rotatably disposed on a rear cover and the middle cover 8 of the housing 10 through front and rear bearings of the motor, a first dust-proof groove 16 and a second dust-proof groove 14 are correspondingly arranged on the end surface of the fan 12, a first dust-proof ring 17 and a second dust-proof ring 15 are correspondingly arranged on the middle cover 8, and the first dust-proof ring 17 and the second dust-proof ring 15 are mutually crossed and matched with the first dust-proof groove 16 and the second dust-proof groove 14 which are opposite to each other, so that the first dust-proof ring 17, the first dust-proof groove 16, the second dust-proof ring 15 and the second dust-proof groove 14 form a double labyrinth dust-proof structure, dust or foreign matters cannot enter the front bearing, and the lubricating effect and the service life of the front bearing are ensured; an air outlet 11 corresponding to the fan 12 is arranged between the casing 10 and the middle cover 8, and an air guide baffle 9 for changing the air outlet direction of the air outlet 11 is arranged on the handle 1, so that cooling air is blown to the casing 10 in a changed direction, the temperature of the casing can be reduced, sawdust cannot be blown, and the working environment is effectively improved.

In order to ensure stable and reliable transmission, a front cover 22 is fixed on the head shell 21 and forms a transmission box body together with the middle cover 8, the transmission mechanism comprises a driving gear 20 and a power output shaft 19, the power output shaft 19 is rotatably arranged between the middle cover 8 and the front cover 22, the driving gear 20 is fixed on the power output shaft 19 and is meshed with a gear on the motor output shaft 18, and the saw blade 5 is fixed on the power output shaft 19 through a pressing plate. The middle cover 8, the head shell 21 and the front cover 22 are made of aluminum alloy.

In order to ensure the use safety, a fixed shield 4 which covers the saw blade 5 is fixed on the head shell 21, and a movable shield 6 which is automatically opened when cutting and is automatically closed when not cutting is arranged between the head shell 21 and the fixed shield 4.

In order to facilitate operation and use, the handle 1 is provided with a power switch 3 and a thumb pushing block 2 which facilitates force application operation.

The above description is only the specific embodiment of the present invention, and is not intended to limit the present invention in any form, and the present invention does not depart from the technical solution of the present invention, and the made simple modification, equivalent change or modification all fall into the protection scope of the present invention.

Claims (5)

1. The utility model provides a hand-held type electric circular saw, includes handle (1), casing (10), motor (13), fan (12), middle lid (8), head shell (21), bottom plate (7), saw bit (5), drive mechanism, and motor output shaft (18) rotationally sets up on the back shroud of casing (10) and middle lid (8), characterized by: the end face of the fan (12) is correspondingly provided with a first dust-proof groove (16) and a second dust-proof groove (14), the middle cover (8) is correspondingly provided with a first dust-proof ring (17) and a second dust-proof ring (15), the first dust-proof ring (17) and the second dust-proof ring (15) are mutually crossed and matched with the first dust-proof groove (16) and the second dust-proof groove (14) which are opposite, so that the first dust-proof ring (17) and the first dust-proof groove (16), the second dust-proof ring (15) and the second dust-proof groove (14) form a double-labyrinth dust-proof structure, an air outlet (11) corresponding to the fan (12) is arranged between the casing (10) and the middle cover (8), a baffle (9) for changing the air outlet direction of the air outlet (11) is arranged on the handle (1), and cooling air is blown to the casing (10) in a changed direction.

2. The hand-held electric circular saw of claim 1, wherein: the saw blade cutting machine is characterized in that a front cover (22) is fixed on the head shell (21) and forms a transmission box body together with the middle cover (8), the transmission mechanism comprises a driving gear (20) and a power output shaft (19), the power output shaft (19) is rotatably arranged between the middle cover (8) and the front cover (22), the driving gear (20) is fixed on the power output shaft (19) and is meshed with a gear on the motor output shaft (18), and the saw blade (5) is fixed on the power output shaft (19) through a pressing plate.

3. The hand-held electric circular saw as claimed in claim 1 or 2, wherein: the head shell (21) is fixed with a fixed shield (4) which covers the saw blade (5), and a movable shield (6) which is automatically opened when cutting and automatically closed when not cutting is arranged between the head shell (21) and the fixed shield (4).

4. The hand-held electric circular saw of claim 1, wherein: the handle (1) is provided with a power switch (3) and a thumb pushing block (2) which is convenient for force application operation.

5. The hand-held electric circular saw of claim 2, wherein: the middle cover (8), the head shell (21) and the front cover (22) are processed by aluminum alloy.

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