CN209793969U - electric circular saw capable of being rapidly switched to dust collection mode - Google Patents

Abstract

the utility model relates to an electric circular saw that can fast switch over to dust absorption mode, fuselage body on including the base plate and locating the base plate, the fuselage body is including setting up shell on the base plate holds drive arrangement in the shell, by drive arrangement drive pivoted saw blade to and fix and be used for covering on the shell the first one of saw blade goes up the guard shield, go up the guard shield have with the storage tank of saw blade looks adaptation, the end of going up the guard shield has and is used for following the piece that the cutting produced the storage tank leads outside collection dirt passageway, the exit position of collection dirt passageway is equipped with the dust absorption joint that is used for connecting outside dust extraction. The piece that this electric circular saw produced when the cutting can conveniently be followed in the upper shield and is led the outside and by dust extraction suction, has improved electric circular saw's cutting accuracy and work efficiency like this effectively.

Description

Electric circular saw capable of being rapidly switched to dust collection mode

Technical Field

The utility model relates to an electric circular saw technical field especially relates to but fast switch over to dust absorption mode's electric circular saw.

background

The electric circular saw is a common electric sawing tool, and the structure of the existing electric circular saw comprises a base plate and a machine body arranged on the base plate, wherein the machine body comprises a shell arranged on the base plate, a motor contained in the shell, a circular saw blade driven by the motor and used for cutting a cutting object in a cutting direction, and a protective cover arranged on the shell and partially covering the circular saw blade. For example, the electric circular saw is a Chinese utility model patent having a patent number of ZL201721287400.0 (publication number of CN207272300U) and a Chinese utility model patent having a patent number of ZL201420334206.3 (publication number of CN203900618U), which both disclose the structure of the electric circular saw.

Current electric circular saw all can produce a large amount of saw-dusts at the saw blade with by the ligneous cutting position of cutting in the cutting use, and the saw-dust can block our cutting line of drawing on timber in advance, leads to not cutting according to predetermined route, influences cutting accuracy, if pile up too much saw-dust in addition, frictional force when can increasing the saw blade cutting leads to the saw bit to generate heat, influences electric circular saw's work efficiency, and the saw blade fragile.

therefore, the conventional electric circular saw needs further improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a but fast switch over to dust absorption mode's electric circular saw, this electric circular saw can be siphoned away the saw-dust that produces when cutting fast.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a but fast switch over to electric circular saw of dust absorption mode, includes the base plate and locates the fuselage body on the base plate, the fuselage body is including setting up shell on the base plate holds drive arrangement in the shell, by drive arrangement drive pivoted circular saw piece to and fix and be used for covering on the shell the first half's of circular saw piece last guard shield, go up the guard shield have with the storage tank of circular saw piece looks adaptation, the end of going up the guard shield has and is used for following the piece that the cutting produced the outside collection dirt passageway is guided to the storage tank, the exit position of collection dirt passageway is equipped with the dust absorption joint that is used for connecting outside dust extraction.

In order to discharge the chips generated by cutting better through the dust collecting channel, the wall surface of the upper shield is provided with an air outlet, and the dust collecting channel is a flow guide groove plate which extends into the accommodating groove from the air outlet and extends forwards. Under the action of the suction force of the external dust suction device, the flow guide groove plate extending into the accommodating groove can effectively guide the debris to the air outlet, so that the dust is more thoroughly sucked.

In order to reduce the processing and assembling cost, the guide groove plate and the upper shield are designed into a whole. Specifically, the guide groove plate and the upper shield can be integrally formed by injection molding.

In order to assemble the upper shield conveniently, the upper shield is formed by buckling an inner half shell positioned on the inner side of the circular saw blade and an outer half shell positioned on the outer side of the circular saw blade, and the dust suction joint is connected to the outer half shell. Will the dust absorption joint is located on the outer half shell, when the user is connected dust extraction's dust absorption pipe and dust absorption joint or split, electric circular saw's each part can not cause the interference to this, and its assembly and dismantlement process are more convenient.

In order to further improve the safety of the electric circular saw, the electric circular saw also comprises a lower protective cover which is rotationally connected to the machine body by taking the axial lead of the circular saw blade as a rotating center; the lower guard has a first state of rotating to above the circular saw blade to be accommodated in the accommodating groove of the upper guard and a second state of rotating to below the circular saw blade to cover a lower half part of the circular saw blade in the rotating process. When the electric circular saw is required to be used for cutting, the lower protective cover can be rotated to a first state, and at the moment, the lower protective cover is accommodated in the accommodating groove of the upper protective cover, so that the lower half part of the circular saw blade is exposed to cut the material to be processed; after the cutting is accomplished, can rotate lower guard shield to the second state when, this moment, lower guard shield cover can keep apart the circular saw blade at the lower half of circular saw blade, avoids the circular saw blade to touch the foreign object and damages or the user touches the circular saw blade and is injured, has improved the security performance.

in order to enable the lower protective cover to rotate to the first state, the chips generated by cutting can also quickly enter the dust collecting channel to be removed, the tail end edge of the lower protective cover extends outwards along the radial direction to form a flow guide opening, and when the lower protective cover is in the first state of being accommodated in the accommodating groove of the upper protective cover, the flow guide direction of the flow guide opening is just towards the inlet of the dust collecting channel of the upper protective cover. Because the tail end of the lower protective cover is provided with a flow guide opening structure formed by extending outwards, when the lower protective cover rotates to the first state, the scraps generated by cutting slightly flow outwards under the flow guide effect of the flow guide opening and quickly enter the dust collection channel to be removed through an external dust suction device.

as the improvement, be equipped with cutting angle regulation structure between base plate and the fuselage body, cutting angle regulation structure includes angle adjusting plate and regulation support, and angle adjusting plate fixes on the base plate and upwards extends the setting, and it has the curved angle adjustment groove to open on the angle adjusting plate, wear to be equipped with angle adjusting screw on the regulation support, this angle adjusting screw pass behind the angle adjustment groove with angle locking knob threaded connection and will adjust the support locking on angle adjusting plate, angle adjusting screw can slide along the angle adjustment groove, and the lower part one side of adjusting the support articulates on the base plate, the lower part opposite side threaded connection of adjusting the support has adjusting screw, and adjusting screw's lower extreme top is held on the base plate, the front end of the shell of fuselage body rotates through first round pin axle and sets up on adjusting the support. This kind of structure setting, make the cutting angle of circular saw blade can conveniently adjust, during the regulation, only need unscrew angle locking knob, then rotate adjusting screw, according to the screw thread transmission principle, make the one end perk of adjusting the support, angle adjusting screw slides along the angle adjustment groove, change because of adjusting the relative angle adjusting plate inclination of support, it changes to rotate the relative base plate of fuselage body state that sets up on adjusting the support, finally the inclination that leads to the relative base plate of circular saw blade changes, realize the change of the cutting angle of circular saw blade.

in a further improvement, a nut is welded on the other side of the lower part of the adjusting bracket, and the adjusting screw is in threaded connection with the nut.

As the improvement, be equipped with the degree of depth regulation structure between base plate and the fuselage body, the degree of depth regulation structure is including fixing the degree of depth regulating plate that sets up and upwards extending on the base plate, and it has the curved degree of depth adjustment groove to open on the degree of depth regulating plate, wear to be equipped with degree of depth adjusting screw on the shell, degree of depth adjusting screw's one end has gear portion, and degree of depth adjusting screw passes behind the front end of degree of depth adjustment groove and shell in proper order and a degree of depth locking knob threaded connection is fixed on the degree of depth regulating plate with the front end of shell. Such structure setting makes the cutting depth of circular saw blade conveniently adjust, during the regulation, unscrews degree of depth locking knob, then rotates the fuselage body again, makes the degree of depth adjusting connecting rod slide from top to bottom along the degree of depth adjustment groove, screws the degree of depth adjusting nut again after sliding suitable position, alright fix the fuselage body with the degree of depth regulating plate once more, changes because of the upper and lower position relation of the relative base plate of fuselage body for the upper and lower position relation of the relative base plate of circular saw blade changes.

compared with the prior art, the utility model has the advantages that: the utility model provides an end of last guard shield of electric circular saw has the dust collection passageway, the exit position of dust collection passageway is equipped with the dust absorption joint that is used for connecting outside dust extraction, when cutting, can be with dust extraction's dust absorption pipeline and above-mentioned dust absorption articulate, the piece that produces when cutting like this alright conveniently from the interior dust collection passageway of following of last guard shield guide outside and by dust extraction gettering to improve electric circular saw's cutting accuracy and work efficiency.

Drawings

Fig. 1 is a schematic perspective view of an electric circular saw according to an embodiment of the present invention;

Fig. 2 is a schematic perspective view of an electric circular saw according to an embodiment of the present invention;

Fig. 3 is a schematic perspective view of an electric circular saw according to an embodiment of the present invention, wherein the lower guard is in a first state;

Fig. 4 is a schematic perspective view of the upper shield and the lower shield according to the embodiment of the present invention;

fig. 5 is a schematic perspective view of a lower guard of an electric circular saw according to an embodiment of the present invention;

FIG. 6 is a schematic view illustrating a dust suction joint and an upper guard of the electric circular saw according to the embodiment of the present invention in an exploded state;

Fig. 7 is a schematic diagram illustrating a dust suction joint and an upper guard of the electric circular saw according to the embodiment of the present invention in an exploded state, in which an inner half shell and an outer half shell of the upper guard are in an exploded state;

Fig. 8 is a schematic view of the inner structure of the outer half shell of the upper shield according to the embodiment of the present invention;

Fig. 9 is a schematic perspective view of the electric circular saw of the embodiment of the present invention with the outer casing removed;

Fig. 10 is a schematic perspective view of a cutting angle adjusting structure and a depth adjusting structure according to an embodiment of the present invention;

FIG. 11 is an exploded view of FIG. 10;

Fig. 12 is a schematic perspective view of a hidden part of an electric circular saw according to an embodiment of the present invention.

Detailed Description

the present invention will be described in further detail with reference to the following embodiments.

Referring to fig. 1 to 12, an electric circular saw capable of rapidly switching to a dust suction mode includes a base plate 10 and a main body provided on the base plate 10, the main body including a housing 21, a driving unit 22, a circular saw blade 23, and an upper guard 30, wherein the housing 21 is provided on the base plate 10 and has a sub-handle 252 at a front portion and a main handle 251 at a rear portion, a lithium battery pack 24 is detachably connected below the main handle 251, the driving unit 22 is accommodated in the housing 21, the circular saw blade 23 is rotated by the driving unit 22, specifically, in the present embodiment, the driving unit 22 is a motor which is drivingly connected to the circular saw blade 23 through a transmission mechanism (not shown), the upper guard 30 is fixed on the housing 21 for covering an upper half portion of the circular saw blade 23, wherein the upper guard 30 has an accommodating groove 300 adapted to the circular saw blade 23, an end of the upper guard 30 has a dust collecting passage for guiding chips generated by cutting from the accommodating groove 300 to the outside, the outlet of the dust collecting channel is provided with a dust collecting joint 40 for connecting an external dust collecting device, specifically, the wall of the upper shield 30 is provided with an air outlet 31, the dust collecting channel is a flow guide groove plate 41 extending into the accommodating groove 300 from the air outlet 31 and extending forward, and the flow guide groove plate 41 extending into the accommodating groove 300 under the suction force of the external dust collecting device can effectively guide the debris to the air outlet 31, so that the dust collection is more thorough, as shown in fig. 7 and 8.

Referring to fig. 6 and 7, in order to reduce the manufacturing and assembly costs, the chute plate 41 and the upper protective cover 30 may be integrally designed, in this embodiment, the chute plate 41 and the upper protective cover 30 are integrally injection-molded, specifically, the upper protective cover 30 is formed by fastening an inner half shell 32 located inside the circular saw blade 23 and an outer half shell 33 located outside the circular saw blade 23, the chute plate 41 and the outer half shell 33 are integrally injection-molded, accordingly, the air outlet 31 is formed on the outer half shell 33, and the dust suction adapter 40 is connected to the air outlet 31 of the outer half shell 33 by a screw, wherein the dust suction adapter 40 is disposed on the outer half shell 33, when a user connects or disconnects a dust suction pipe of the dust suction device with the dust suction adapter 40, the components of the electric circular saw will not interfere with each other, and the assembly and disassembly processes thereof are more convenient.

Referring to fig. 4 and 5, in order to further improve the safety of the electric circular saw, the electric circular saw further includes a lower guard 50 rotatably coupled to the main body of the main body with the axial line of the circular saw blade 23 as a rotation center, specifically, a shaft hole 500 for rotatably coupling to the main body is provided at a middle position of the lower guard 50, the lower guard 50 has a first state of being rotated to the upper side of the circular saw blade 23 to be received in the receiving groove 300 of the upper guard 30 and a second state of being rotated to the lower side of the circular saw blade 23 to cover the lower half of the circular saw blade 23 during the rotation, and specifically, a positioning column 34 for limiting the lower guard 50 in the first state and the second state is provided on an inner wall of the front end of the upper guard 30. In order to facilitate the user to rotate the lower guard 50, the lower guard 50 is further provided with an operating part 51 facilitating the user to rotate, specifically, the operating part 51 is a manual knob connected to the outer wall surface of the lower guard 50, when the electric circular saw is required to be used for cutting, the user can rotate the lower guard 50 to a first state through the manual knob, at this time, the lower guard 50 can be accommodated in the accommodating groove 300 of the upper guard 30, so that the lower half part of the circular saw blade 23 is exposed to cut the material to be processed; after the cutting is accomplished, when the manual knob rotates lower guard shield 50 to the second state, this moment, lower guard shield 50 covers can keep apart circular saw blade 23 at the lower half of circular saw blade 23, avoids circular saw blade 23 touch foreign object and damage or the user touches circular saw blade 23 and is injured, has improved the security performance.

In order to make the lower protective cover 50 rotate to the first state, the cut debris can also rapidly enter the dust collecting channel for removal, the end edge of the lower protective cover 50 extends radially outward to form a diversion opening 52, i.e. the diversion opening 52 extends outward in a direction away from the axis of the lower protective cover 50, and when the lower protective cover 50 is in the first state of being accommodated in the accommodating groove 300 of the upper protective cover 30, the diversion opening 52 is just directed towards the inlet 410 of the dust collecting channel of the upper protective cover 30. Because the end of the lower protective cover 50 has the structure of the flow guiding opening 52 formed by extending outward, when the lower protective cover 50 rotates to the first state, the chips generated by cutting will slightly flow outward under the flow guiding effect of the flow guiding opening 52 and rapidly enter the dust collecting channel to be removed by the external dust suction device, as shown in fig. 4 and 5.

The electric circular saw in this embodiment further has a cutting angle adjusting structure for adjusting different cutting angles and a depth adjusting structure for adjusting a cutting depth of the circular saw blade 23, wherein the cutting angle adjusting structure is disposed between the base plate 10 and the machine body, specifically, referring to fig. 10 and 11, the cutting angle adjusting structure includes an angle adjusting plate 61 and an adjusting bracket 62, the angle adjusting plate 61 is fixed on the base plate 10 and extends upward, an arc-shaped angle adjusting groove 610 is formed on the angle adjusting plate 61, an angle adjusting screw 63 is penetrated through the adjusting bracket 62, the angle adjusting screw 63 passes through the angle adjusting groove 610 and then is in threaded connection with an angle locking knob 64 to lock the adjusting bracket 62 on the angle adjusting plate 61, the angle adjusting screw 63 can slide along the angle adjusting groove 610, one side of a lower portion of the adjusting bracket 62 is hinged on the base plate 10 through a second pin shaft 68, adjusting screw 65 is connected with the other side threaded connection of the lower part of adjusting bracket 62, and the lower extreme top of adjusting screw 65 is held on base plate 10, and the welding has nut 67 on the other side of the lower part of adjusting bracket 62, and adjusting screw 65 threaded connection is on this nut 67, and the front end of the shell 21 of fuselage body rotates through first round pin axle 66 and sets up on adjusting bracket 62. When preparing to adjust the cutting angle of circular saw, only need unscrew angle locking knob 64, then rotate adjusting screw 65 again, according to the screw thread transmission principle, make the one end perk of adjusting support 62, angle adjusting screw 63 upwards slides along angle adjustment groove 610, change because of adjusting 62 relative angle adjusting plate 61 inclination of support, rotate the relative base plate 10 of the fuselage body state that sets up on adjusting support 62 and take place the angle change, finally lead to the relative base plate 10's of circular saw blade 23 inclination to change, realize the change of the cutting angle of circular saw blade 23.

The depth adjusting structure is arranged between the base plate 10 and the machine body and comprises a depth adjusting plate 71 which is fixed on the base plate 10 and extends upwards, an arc-shaped depth adjusting groove 72 is formed in the depth adjusting plate 71, specifically, the depth adjusting groove 72 is an arc-shaped groove taking a first pin shaft 66 as an axial lead, a depth adjusting screw 73 penetrates through the shell 21, one end of the depth adjusting screw 73 is provided with a stop part 74, the depth adjusting screw 73 sequentially penetrates through the depth adjusting groove 72 and the rear end of the shell 21 and then is in threaded connection with a depth locking knob 75 so as to fix the rear end of the shell 21 on the depth adjusting plate 71, the structure is arranged, so that a circular saw for adjusting the cutting depth of the shell 23 is convenient, the depth locking knob 75 is unscrewed during adjustment, then the machine body is rotated, the depth adjusting connecting rod slides up and down along the depth adjusting groove 72, the depth adjusting nut 67 is screwed after the depth adjusting rod slides to a proper position, the body is fixed to the depth adjusting plate 71 again, and the vertical position of the circular saw blade 23 with respect to the base plate 10 is changed by changing the vertical position of the body with respect to the base plate 10. In order to make the up-and-down sliding process of the body relative to the depth adjusting plate 71 more stable, the stop portion 74 at the end of the depth adjusting screw 73 abuts against the inner wall of the inner half shell 32 of the upper shield 30, the outer wall surface of the inner half shell 32 of the upper shield 30 is further provided with a fixing frame 321 with a sliding groove 322, the depth adjusting plate 71 is embedded in the sliding groove 322, when the body rotates, the depth adjusting plate 71 can slide up and down in the sliding groove 322 of the fixing frame 321, so that the depth adjusting screw 73 can pass through the inner half shell 32 of the upper shield 30, the depth adjusting groove 72 and the shell 21 in sequence and then is in threaded connection with the depth locking knob 75 to firmly fix the rear end of the shell 21 on the depth adjusting plate 71, as shown in detail in fig. 9 and 12; in addition, in order to adjust the angle of the cutting angle adjusting structure in cooperation with the body, the depth adjusting plate 71 is rotatably connected to the base plate 10 by a third pin 711, wherein the third pin 711 is coaxially disposed with the second pin 68 of the cutting angle adjusting structure, as shown in detail in fig. 11.

The end of the upper protection cover 30 of the electric circular saw in this embodiment has a dust collecting channel, the outlet of the dust collecting channel is provided with a dust collecting joint 40 for connecting an external dust suction device, when cutting is performed, a dust suction pipeline of the dust suction device can be connected with the dust collecting joint 40, so that the chips generated during cutting can be conveniently guided to the outside from the upper protection cover 30 through the dust collecting channel and sucked by the dust suction device, thereby improving the cutting precision and the working efficiency of the electric circular saw.

Claims (10)

1. Electric circular saw that can switch over fast to dust absorption mode, include base plate (10) and locate the fuselage body on base plate (10), the fuselage body is including setting up shell (21) on base plate (10), hold in drive arrangement (22) in shell (21), by drive arrangement (22) drive pivoted circular saw piece (23) to and fix on shell (21) and be used for covering last guard shield (30) of the first half of circular saw piece (23), its characterized in that: the upper shield (30) is provided with a containing groove (300) matched with the circular saw blade (23), the tail end of the upper shield (30) is provided with a dust collecting channel used for guiding the scraps generated by cutting from the containing groove (300) to the outside, and the outlet position of the dust collecting channel is provided with a dust suction joint (40) used for connecting an external dust suction device.

2. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 1, wherein: an air outlet (31) is formed in the wall surface of the upper shield (30), and the dust collecting channel is a flow guide groove plate (41) which extends into the accommodating groove (300) from the position of the air outlet (31) and extends forwards.

3. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 2, wherein: the flow guide groove plate (41) and the upper shield (30) are designed into a whole.

4. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 1, wherein: go up guard shield (30) and form by interior half shell (32) that are located the inboard of circular saw blade (23) and outer half shell (33) lock joint that are located the outside of circular saw blade (23), dust absorption connects (40) and connects on outer half shell (33).

5. The electric circular saw capable of being rapidly switched to the dust suction mode according to any one of claims 1 to 4, wherein: the lower protective cover (50) is rotationally connected to the machine body by taking the axial lead of the circular saw blade (23) as a rotation center;

The lower guard (50) has a first state of rotating to above the circular saw blade (23) to be received in the receiving groove (300) of the upper guard (30) and a second state of rotating to below the circular saw blade (23) to cover a lower half portion of the circular saw blade (23) during the rotation.

6. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 5, wherein: the lower shield (50) is also provided with an operation part (51) which is convenient for a user to rotate and operate.

7. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 5, wherein: the tail end edge of the lower shield (50) extends outwards in the radial direction to form a flow guide opening (52), and when the lower shield (50) is in a first state of being accommodated in the accommodating groove (300) of the upper shield (30), the flow guide opening (52) has a flow guide direction which is just towards the inlet (410) of the dust collection channel of the upper shield (30).

8. The electric circular saw capable of being rapidly switched to the dust suction mode according to any one of claims 1 to 4, wherein: be equipped with cutting angle regulation structure between base plate (10) and the fuselage body, cutting angle regulation structure includes angle adjusting plate (61) and adjusting bracket (62), and angle adjusting plate (61) is fixed on base plate (10) and upwards extends the setting, and it has arc angle adjustment groove (610) to open on angle adjusting plate (61), wear to be equipped with angle adjusting screw (63) on adjusting bracket (62), this angle adjusting screw (63) pass angle adjustment groove (610) back and angle locking knob (64) threaded connection and with adjusting bracket (62) locking on angle adjusting plate (61), angle adjusting screw (63) can slide along angle adjustment groove (610), and the lower part one side of adjusting bracket (62) articulates on base plate (10), and the lower part opposite side threaded connection of adjusting bracket (62) has adjusting screw (65), and the lower extreme top of adjusting screw (65) is held on base plate (10), the rear end of a shell (21) of the machine body is rotatably arranged on the adjusting bracket (62) through a first pin shaft (66).

9. The electric circular saw capable of being rapidly switched to the dust suction mode according to claim 8, wherein: and a nut (67) is welded on the other side of the lower part of the adjusting bracket (62), and the adjusting screw (65) is in threaded connection with the nut (67).

10. the electric circular saw capable of being rapidly switched to the dust suction mode according to claim 8, wherein: be equipped with the degree of depth between base plate (10) and the fuselage body and adjust the structure, the degree of depth is adjusted the structure and is including fixing on base plate (10) and upwards extending the degree of depth regulating plate (71) that sets up, and it has curved degree of depth adjustment groove (72) to open on degree of depth regulating plate (71), wear to be equipped with degree of depth adjusting screw (73) on shell (21), the one end of degree of depth adjusting screw (73) has gear position portion (74), and degree of depth adjusting screw (73) pass in proper order behind the front end of degree of depth adjustment groove (72) and shell (21) with a degree of depth locking knob (75) threaded connection in order to be fixed on degree of depth regulating plate (71) the front end of shell (21).