Electric circular saw with cutting angle convenient to adjust

Abstract

In order to solve the problem that the cutting saw inclination angle of an existing electric circular saw is difficult to adjust, the utility model provides an electric circular saw convenient to adjust the cutting angle, the electric circular saw comprises a shell, a rotating structure, a saw blade and a cover, and the saw blade is detachably arranged on the rotating structure; the rotating structure is fixedly arranged in the shell; the cover is fixedly connected with the shell; the saw blade is positioned in the cover; the whole saw plate is in a square plate shape, and the saw plate is rotationally arranged on the shell and / or the cover; the saw plate is positioned at the bottoms of the shell and the cover; an angle plate is further arranged on the saw plate, and the angle plate is fixedly arranged above the saw plate; by arranging the through groove which is the Z-shaped groove in the angle plate, the inclination angle of the saw plate corresponding to the bending part of the Z-shaped groove can be accurately controlled, on one hand, the angle can be conveniently adjusted to a specific inclination angle, and on the other hand, the cutting operation at the specific angle can be better controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of electric circular saws, in particular to an electric circular saw convenient for adjusting the cutting angle. Background Art

[0002] An electric circular saw is a tool for driving a circular saw blade to cut a board. The electric circular saw mainly includes a motor, a saw blade, a bottom plate and a housing, such as the content shown in the patent with the authorized announcement number CN217531114U and the application publication number CN112117866A. In the existing electric circular saw, the bottom plate can usually be adjusted in angle. An arc-shaped connecting plate is provided on the bottom plate for adjusting the angle and reading the angle value. However, the existing arc-shaped connecting plates are all in the shape of a circular arc, and it is difficult to accurately read specific angles, and only approximate adjustment can be performed. Therefore, an electric circular saw structure capable of setting an angle for precise adjustment is needed. Summary of the Invention

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and provide an electric circular saw convenient for adjusting the cutting angle.

[0004] To solve the above problems, the utility model adopts the following scheme:

[0005] An electric circular saw convenient for adjusting the cutting angle, comprising a housing, a rotating structure, a saw blade and a cover. The saw blade is detachably arranged on the rotating structure; the rotating structure is fixedly arranged inside the housing; the cover is fixedly connected to the housing; the saw blade is located inside the cover; it further includes a saw plate, the saw plate is integrally in the shape of a square plate, and the saw plate is rotatably arranged on the housing and / or the cover; the saw plate is located at the bottom of the housing and the cover; an angle plate is further arranged on the saw plate, and the angle plate is fixedly arranged above the saw plate; an arc-shaped through groove is arranged on the angle plate, and scales for marking angles are arranged on the edge of the through groove; the center of the arc-shaped through groove coincides with the rotation axis of the rotation connection part between the saw plate and the housing and / or the cover; a connecting rod clamped with the through groove of the angle plate is further arranged on the housing and / or the cover, and a connecting hole corresponding to the through groove is arranged on the connecting rod; a clamping member for fastening the angle plate and the connecting rod is arranged in the connecting hole and the through groove;

[0006] The through groove is arranged as a "Z" - shaped groove, including two arc parts with different radii; the connecting hole on the connecting rod is arranged as a corresponding "L" - shaped hole, corresponding to the two arc parts with different radii in the through groove.

[0007] Further, the angle at which the two arc parts with different radii in the through groove are connected is a set angle.

[0008] Further, the rotating structure is a motor, and the motor body is located inside the housing; one end of the rotating shaft of the motor extends into the cover for connecting the saw blade.

[0009] Furthermore, the motor is an outer rotor motor.

[0010] Furthermore, the housing includes a cavity for placing the motor and a handle for grasping; the handle is integrally U-shaped, and the open end of the handle is fixedly connected to the outer side of the cavity.

[0011] Furthermore, the handle is also provided with protruding gripping blocks, and the gripping blocks are located on one side of the handle close to the advancing direction of the circular saw.

[0012] Furthermore, the cover includes a fixed cover and a movable cover; the fixed cover is fixedly connected to the housing; the fixed cover is integrally semi-circular disk-shaped, the inside of the fixed cover is hollowed out, the movable cover is integrally fan-shaped disk-shaped, and the size of the movable cover is smaller than that of the fixed cover; the movable cover is rotatably arranged inside the fixed cover, and the centers of the movable cover and the fixed cover are both located on the rotation axis of the rotation structure; the inside of the movable cover is also hollowed out, and the saw blade is located inside the movable cover; the fixed cover is also provided with a ventilation opening penetrating the side wall of the fixed cover, and the ventilation opening faces the inside of the fixed cover; the fixed cover and the ventilation opening are detachably arranged; the outer side of the fixed cover far from the housing is provided with a hollowed-out ventilation hole, and the ventilation hole is connected to the ventilation opening.

[0013] Furthermore, the ventilation opening is integrally cylindrical tubular; one end of the ventilation opening is connected to the ventilation hole provided on the side of the fixed cover through a threaded member.

[0014] Furthermore, a tension spring for helping the movable cover to reset is also arranged between the fixed cover and the movable cover, one end of the tension spring is connected to the fixed cover, and the other end of the tension spring is connected to a set position on the movable cover.

[0015] Furthermore, the movable cover is also provided with a dial for conveniently manually rotating the movable cover.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By setting the through groove on the angle plate as a "Z"-shaped groove, the inclination angle of the saw plate corresponding to the bending part of the "Z"-shaped groove can be more accurately controlled. On the one hand, it is convenient to adjust to a specific inclination angle, and on the other hand, the cutting operation at this specific angle can be better controlled;

[0018] By setting the motor as an outer rotor motor, compared with the traditional inner rotor motor, the outer rotor motor has a greater torque, can achieve a better cutting effect, and improve the cutting efficiency;

[0019] By arranging a ventilation opening on the fixed cover of the circular saw, external gas can be introduced into the area between the fixed cover and the movable cover, and to a certain extent, the saw blade and the rotation structure of the circular saw can be cooled;

[0020] By arranging the vent holes connecting to the ventilation openings on the outer side of the fixed cover and cooperating with the movable cover, the possibility of debris splashing from the saw into the ventilation openings is reduced;

[0021] By arranging a tension spring between the fixed cover and the movable cover, it is convenient for the movable cover to reset when not subjected to external force, which can protect the saw blade, improve safety and facilitate carrying;

[0022] By arranging a gripping block on the handle, two-handed gripping is achieved, improving the gripping stability and control accuracy. Description of the Drawings

[0023] Figure 1 Schematic diagram of the overall structure of Embodiment 1 Figure 1 ;

[0024] Figure 2 Schematic diagram of the overall structure of Embodiment 1 Figure 2 ;

[0025] Figure 3 Schematic diagram of the overall structure of Embodiment 1 Figure 3 ;

[0026] Figure 4 Schematic diagram of the cover part of Embodiment 1;

[0027] Figure 5 Exploded view of the cover part of Embodiment 1;

[0028] Figure 6 Schematic diagram of the overall structure of Embodiment 1 Figure 4 ;

[0029] Figure 7 Schematic diagram of the saw plate of Embodiment 1 Figure 1 ;

[0030] Figure 8 Schematic diagram of the saw plate of Embodiment 1 Figure 2 .

[0031] Description of the drawing reference numerals: housing 1, cavity 11, handle 12, gripping block 13, rotating structure 2, cover 3, fixed cover 31, vent hole 311, stop block 312, movable cover 32, dial block 321, ventilation opening 33, tension spring 34, connecting rod 35, connecting hole 351, arrow mark 352, saw plate 4, angle plate 41, through slot 42, scale 43. Detailed Implementation Manner

[0032] The following specific examples illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] It should be noted that the drawings provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0034] Embodiment 1:

[0035] As Figures 1 to 8As shown, an electric circular saw that is easy to adjust the cutting angle includes a housing 1, a rotating structure 2, a saw blade and a cover 3; wherein the saw blade is detachably arranged on the rotating structure 2, and the saw blade moves with the rotation of the rotating structure 2 to achieve the purpose of cutting a saw plate 4, which is not shown in the drawings; the rotating structure 2 is fixedly arranged inside the housing 1; the cover 3 is fixedly connected to the housing 1; the saw blade is located in the cover 3; and also includes a saw board 4, which is in the shape of a square plate as a whole, and is arranged on the housing 1 and / or the cover 3. In the example, the saw plate 4 is rotatably connected to the cover 3; the saw plate 4 is located at the bottom of the housing 1 and the cover 3, and the saw plate 4 is used to fit the surface of the board to be sawed, so as to facilitate the control of the depth and direction of sawing; the saw plate 4 is also provided with an angle plate 41, which is fixedly arranged above the saw plate; the angle plate 41 is provided with an arc-shaped through groove 42, and the edge of the through groove 42 is provided with a scale 43 for marking the angle, and the scale 43 corresponds to the through groove 42; in this example, the angle scale 43 on the angle plate 41 includes 0~57°, A scale 43 is provided at every 5° interval between 0 and 50°, and an angle value mark is provided at every 15° interval, namely 0, 15°, 30° and 45°. A scale 43 is also provided at the inclination position of 57°, and an angle value mark is provided. It should be noted that in some other embodiments, angle scales 43 of other angle ranges may be provided; the center of the arc-shaped through groove 42 coincides with the rotation axis of the rotation connection portion between the saw plate and the housing 1 and / or the cover 3; the housing 1 And / or the cover 3 is also provided with a connecting rod 35 that is clamped with the through slot 42 of the angle plate 41, and the connecting rod 35 is provided with a connecting hole 351 corresponding to the through slot 42; a clamping member for fastening the angle plate 41 and the connecting rod 35 is provided in the connecting hole 351 and the through slot 42; the through slot 42 is configured as a "Z"-shaped groove, including two circular arc parts with different radii; the connecting hole 351 on the connecting rod 35 is configured as a corresponding "L"-shaped hole, corresponding to the two circular arc parts with different radii in the through slot 42.

[0036] The transition angle of the two circular arcs with different radii in the through slot 42 is a set angle. In this example, the transition portion of the through slot 42 is 45°, in order to facilitate adjustment to an inclination angle of 45°.

[0037] In order to facilitate accurate adjustment of the saw plate angle, an arrow mark 352 is further provided on the connecting rod 35 , and the arrow mark 352 corresponds to the scale 43 on the angle plate 41 .

[0038] The rotating structure 2 is a motor, and the motor body is located inside the housing 1; the motor is an outer rotor motor; one end of the rotating shaft of the motor extends into the cover 3 for connecting the saw blade, and a power supply connected to the motor is also provided on the housing 1. The housing 1 includes a cavity 11 for placing the motor and a handle 12 for gripping, and the handle 12 is arranged on the side of the cavity 11; wherein the handle 12 is also detachably connected to the power supply, which is convenient for replacing the rechargeable power supply and improving the battery life of the circular saw. The handle 12 is integrally U-shaped, and the open end of the handle 12 is fixedly connected to the outer side surface of the cavity 11. In this example, the handle 12 and the cavity 11 are integrally formed; a protruding gripping block 13 is also provided on the handle 12, and the gripping block 13 is located on one side of the handle 12 close to the advancing direction of the circular saw; during use, one hand holds the handle 12 and the other hand grabs the gripping block 13, and the two hands hold it, which greatly improves the gripping stability and is convenient for controlling the cutting line of the circular saw.

[0039] The cover 3 includes a fixed cover 31 and a movable cover 32; the fixed cover 31 is fixedly connected to the housing 1; the fixed cover 31 is integrally semi-circular disk-shaped, and the inside of the fixed cover 31 is hollowed out. The movable cover 32 is integrally fan-shaped disk-shaped, and the size of the movable cover 32 is smaller than that of the fixed cover 31; the movable cover 32 is rotatably arranged inside the fixed cover 31, and the centers of the movable cover 32 and the fixed cover 31 are both located on the rotation axis of the rotating structure 2; the inside of the movable cover 32 is also hollowed out, and the saw blade is located inside the movable cover 32; a ventilation opening 33 penetrating the side wall of the fixed cover 31 is also provided on the fixed cover 31, and the ventilation opening 33 faces the inside of the fixed cover 31.

[0040] The fixed cover 31 and the ventilation opening 33 are detachably arranged; a hollow ventilation hole 311 is provided on the outer side surface of the fixed cover 31 away from the housing 1, and the ventilation hole 311 is connected to the ventilation opening 33, wherein the ventilation hole 311 faces the side of the fixed cover 31 close to the housing 1; so that the air flow inhaled into the cover 3 through the ventilation hole 311 can flow along the inner side wall of the fixed cover 31, taking away the heat transferred from the rotating structure 2 to the fixed cover 31, and at the same time can also take away the heat on the movable cover 32 to a certain extent. The ventilation opening 33 is integrally cylindrical tubular; one end of the ventilation opening 33 is connected to the ventilation hole 311 provided on the side surface of the fixed cover 31 through a threaded part, and the other end of the ventilation opening 33 faces the opposite direction of the advancing direction of the circular saw, which is convenient for natural air intake or connecting an air intake device for air intake, preventing the connecting pipe of the air intake device from obstructing the forward cutting operation of the circular saw.

[0041] A tension spring 34 for helping the movable cover 32 to reset is further arranged between the fixed cover 31 and the movable cover 32. One end of the tension spring 34 is connected to the fixed cover 31, and the other end of the tension spring 34 is connected to a set position on the movable cover 32. When the movable cover 32 is not rotated, the tension spring 34 pulls the movable cover 32 back to the set initial position, so that the movable cover 32 and the fixed cover 31 are spaced apart by a set angle. In this example, the initial position of the movable cover 32 is that the entire movable cover 32 is outside the fixed cover 31, and one end of the movable cover 32 is close to the end of the fixed cover 31, so that the movable cover 32 and the fixed cover 31 can wrap the saw blade as much as possible, reducing the exposed part of the saw blade. On the one hand, it protects the saw blade from being knocked, and on the other hand, it can also improve safety and facilitate carrying. It should be noted that a protruding stop block 312 is arranged on the fixed cover 31 to block the rotation angle when the movable cover 32 is restored, ensuring that the movable cover 32 stops rotating after rotating to the initial position. A dial 321 for conveniently manually rotating the movable cover 32 is also arranged on the movable cover 32. During implementation, the movable cover 32 needs to be manually grasped by the dial 321 and rotated to a set angle, and then the electric circular saw is pressed down to cooperate with the surface to be sawn on the board to realize the rotation of the movable cover 32 and the income into the fixed cover 31.

[0042] During the implementation process, by setting the through groove 42 on the angle plate 41 as a "Z"-shaped arc groove, the inclination angle of the saw blade corresponding to the bending part of the "Z"-shaped groove can be more accurately controlled. On the one hand, it is convenient to adjust to a specific inclination angle, which is 0, 45 degrees and 57 degrees in this example. On the other hand, it can also better control the cutting operation at this specific angle. By setting the motor as an external rotor motor, compared with the traditional internal rotor motor, the external rotor motor has a greater torque, can achieve a better cutting effect and improve the cutting efficiency. By arranging a ventilation port 33 on the fixed cover 31 of the electric circular saw, external gas can be introduced into the area between the fixed cover 31 and the movable cover 32, to a certain extent, cooling the saw blade and the rotating structure 2 of the electric circular saw. By setting the ventilation hole 311 connecting the ventilation port 33 on the outer side of the fixed cover 31 and cooperating with the movable cover 32, the possibility of cutting debris splashing into the ventilation port 33 is reduced. By arranging a tension spring 34 between the fixed cover 31 and the movable cover 32, it is convenient for the movable cover 32 to reset when not subjected to external force, realizing the protection of the saw blade, improving safety and facilitating carrying. By arranging a gripping block 13 on the handle, two-handed gripping is realized, improving the gripping stability and control accuracy.

[0043] The above description is only a specific example of the present utility model and does not constitute any limitation to the present utility model. Obviously, for professionals in this field, after understanding the content and principle of the present utility model, various modifications and changes in form and details may be made without departing from the principle and structure of the present utility model. However, these corrections and changes based on the idea of the present utility model are still within the scope of protection of the claims of the present utility model.

Claims

1. An electric circular saw facilitating adjustment of the cutting angle, comprising a housing (1), a rotating structure (2), a saw blade, and a cover (3), wherein the saw blade is detachably arranged on the rotating structure (2); the rotating structure (2) is fixedly arranged inside the housing (1); the cover (3) is fixedly connected to the housing (1); the saw blade is located inside the cover (3); it is characterized in that, The saw plate (4) is also provided. The saw plate (4) is in the shape of a square plate as a whole. The saw plate (4) is rotatably arranged on the housing (1) and / or the cover (3). The saw plate (4) is located at the bottom of the housing (1) and the cover (3). The saw plate (4) is also provided with an angle plate (41), which is fixedly arranged above the saw plate. The angle plate (41) is provided with an arc-shaped through groove (42), and the edge of the through groove (42) is provided with a scale (43) for marking an angle. 2) coincides with the rotation axis of the rotational connection portion between the saw plate and the housing (1) and / or the cover (3); the housing (1) and / or the cover (3) are further provided with a connecting rod (35) that is engaged with the through slot (42) of the angle plate (41); the connecting rod (35) is provided with a connecting hole (351) corresponding to the through slot (42); a clamping member for fastening the angle plate (41) and the connecting rod (35) is provided in the connecting hole (351) and the through slot (42); The through groove (42) is configured as a "Z"-shaped groove, including two arc portions with different radii; the connecting hole (351) on the connecting rod (35) is configured as a corresponding "L"-shaped hole, corresponding to the two arc portions with different radii in the through groove (42).

2. The electric circular saw according to claim 1, which is convenient for adjusting the cutting angle, is characterized in that The angle at which the two circular arcs with different radii in the through groove (42) are connected is a set angle.

3. The electric circular saw for facilitating the adjustment of the cutting angle according to claim 1, wherein, The rotating structure (2) is a motor, the main body of which is located inside the housing (1); one end of the motor's rotating shaft extends into the cover (3) for connecting to a saw blade.

4. The electric circular saw capable of conveniently adjusting the cutting angle according to claim 3, characterized in that, The motor is an outer rotor motor.

5. A circular saw facilitating the adjustment of a cutting angle according to claim 3, wherein, The housing (1) comprises a cavity (11) for accommodating a motor and a handle (12) for grasping; the handle (12) is generally U-shaped, and an open end of the handle (12) is fixedly connected to the outer side surface of the cavity (11).

6. The electric circular saw for facilitating the adjustment of the cutting angle according to claim 5, wherein The handle (12) is also provided with a protruding gripping block (13), and the gripping block (13) is located on a side of the handle (12) close to the forward direction of the electric circular saw.

7. A circular saw facilitating adjustment of a cutting angle according to claim 1, wherein, The cover (3) comprises a fixed cover (31) and a movable cover (32); the fixed cover (31) is fixedly connected to the housing (1); the fixed cover (31) is in the shape of a semicircular disk as a whole, the interior of the fixed cover (31) is arranged to be hollow, the movable cover (32) is in the shape of a fan-shaped disk as a whole, and the size of the movable cover (32) is smaller than that of the fixed cover (31); the movable cover (32) is rotatably arranged inside the fixed cover (31), and the center of the movable cover (32) and the center of the fixed cover (31) are both located at the rotating structure (2 ); the interior of the movable cover (32) is also hollowed out, and the saw blade is located inside the movable cover (32); the fixed cover (31) is also provided with a vent (33) penetrating the side wall of the fixed cover (31), and the vent (33) faces the interior of the fixed cover (31); the fixed cover (31) and the vent (33) are detachably provided; the outer side surface of the fixed cover (31) away from the housing (1) is provided with a hollowed-out vent (311), and the vent (311) is connected to the vent (33).

8. The electric circular saw capable of facilitating the adjustment of the cutting angle according to claim 7, wherein, The ventilation opening (33) is in the shape of a cylindrical tube as a whole; one end of the ventilation opening (33) is connected to a vent hole (311) provided on the side of the fixed cover (31) via a threaded member.

9. The electric circular saw for facilitating the adjustment of the cutting angle according to claim 7, wherein A tension spring (34) for assisting the movable cover (32) to reset is further arranged between the fixed cover (31) and the movable cover (32). One end of the tension spring (34) is connected to the fixed cover (31), and the other end of the tension spring (34) is connected to a set position on the movable cover (32).

10. A circular saw facilitating adjustment of cutting angle according to claim 7, characterized in that, A dial block (321) for facilitating manual rotation of the movable cover (32) is further arranged on the movable cover (32).

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