Electric tool

Abstract

The invention relates to the technical field of tools, in particular to an electric tool which comprises a cutting piece extending in a cutting plane; the output shaft is used for installing the cutting piece; the motor is used for driving the output shaft to rotate around a first axis; the shell is at least used for accommodating the motor; the machine shell is arranged to be capable of rotating around a second axis relative to the first bottom plate. According to the method, the maximum cutting speed of the electric tool is larger than or equal to 9000 rpm, so that the cut section is smooth and free of burrs.

Description

Technical Field

[0001] The present application relates to the technical field of tools, and in particular to an electric tool. Background Art

[0002] Electric circular saw is an electric cutting tool, which is used by operators to cut the products to be processed. At present, the ordinary circular saws on the market have low speed, and the cutting section accuracy and burr cannot meet the requirements, so they are mostly operated by marble machines. However, a simple marble machine cannot meet the needs of users. Summary of the invention

[0003] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide an electric tool that can make the cutting section smooth and burr-free.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] An electric tool comprises: a cutting piece extending in a cutting plane; an output shaft for mounting the cutting piece; a motor for driving the output shaft to rotate around a first axis; a housing at least for accommodating the motor; a first base plate, the housing being configured to be rotatable around a second axis relative to the first base plate; and a maximum cutting speed of the cutting piece being greater than or equal to 9000 rpm.

[0006] In some embodiments, the cutting member is a saw blade, and a diameter of the saw blade is greater than or equal to 100 mm and less than or equal to 150 mm.

[0007] In some embodiments, the maximum cutting depth of the cutting element is greater than or equal to 30 mm and less than or equal to 60 mm.

[0008] In some embodiments, the rated input power of the motor is greater than or equal to 800W.

[0009] In some embodiments, the weight of the power tool is less than or equal to 3 kg.

[0010] In some embodiments, a second bottom plate is further included, wherein the second bottom plate is located at the lower end of the first bottom plate and is detachably connected to the first bottom plate.

[0011] In some embodiments, a positioning slider and a slider fixing member are provided on the second base plate, the positioning slider is located below the second base plate, the positioning slider is configured to extend along the second axis direction, and is configured to slide relative to the second base plate along the first axis direction, and the slider fixing member is configured to fix the positioning slider after the positioning slider slides into place.

[0012] In some embodiments, a scale extending along the sliding direction of the positioning slider is provided on the second bottom plate.

[0013] In some embodiments, a depth adjustment bracket is further included, and the depth adjustment bracket is configured to adjust the cutting depth of the cutting member. A groove is opened on the housing, and part of the depth adjustment bracket is embedded in the groove.

[0014] In some embodiments, a shield assembly is further included, wherein the shield assembly is used to cover at least a portion of the cutting piece, the shield assembly has a main dust outlet and an auxiliary dust outlet, and the depth adjustment bracket is provided with a shielding portion facing the auxiliary dust outlet, and the upper end surface of the shielding portion is higher than the auxiliary dust outlet.

[0015] The benefit of the present application is that the maximum cutting speed of the electric tool provided by the present application is greatly improved, making the cutting section smooth and burr-free. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a first viewing angle when the electric tool provided by an embodiment of the present application is not installed with a second base plate;

[0017] Figure 2 is a structural schematic diagram of a second viewing angle when the electric tool provided by an embodiment of the present application is not installed with a second base plate;

[0018] Figure 3 is a schematic diagram of the structure of the electric tool provided in an embodiment of the present application when the second base plate and the grip shell are not installed;

[0019] Figure 4 yes Figure 3 A schematic diagram of a partially exploded structure;

[0020] Figure 5 is a schematic diagram of the structure of the electric tool provided in an embodiment of the present application after the second base plate is installed;

[0021] Figure 6 It is a schematic diagram of the structure of the electric tool and the second base plate decomposed according to an embodiment of the present application.

[0022] In the figure:

[0023] 1. Cutting plane; 2. First axis; 3. Second axis; 4. Third axis;

[0024] 10. cutting mechanism; 11. cutting member; 12. output shaft; 13. transmission mechanism; 14. motor; 15. housing; 151. first housing; 152. second housing; 153. grip housing; 1531. gripping portion; 154. shaft lock; 155. groove; 16. depth adjustment bracket; 161. shielding portion; 1611. upper end surface;

[0025] 20. first bottom plate; 21. first opening; 22. first workpiece contact plane;

[0026] 30. Second bottom plate; 31. Second opening; 32. Round hole; 33. Positioning slider; 34. Slideway; 35. Slider fixing member; 36. Positioning block; 37. Weight-reducing hole; 38. Second workpiece contact plane;

[0027] 40. Bolt; 41. Anti-drop nut;

[0028] 50. Shield assembly; 51. Fixed shield; 52. Movable shield; 53. Auxiliary dust outlet; 54. Main dust outlet. DETAILED DESCRIPTION

[0029] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0030] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0031] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0032] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0033] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0034] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0035] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0036] like Figures 1 to 6 As shown, the present application provides an electric tool, in particular an electric circular saw, which can be used for cutting wood, fiberboard, plastic, etc.

[0037] Reference Figures 1 to 4The electric tool comprises a cutting mechanism 10 and a first base plate 20, wherein the cutting mechanism 10 comprises a cutting member 11, an output shaft 12, a motor 14, a transmission mechanism 13 and a housing 15. The cutting member 11 extends in a cutting plane 1; the output shaft 12 is used to drive the cutting member 11, and the output shaft 12 can rotate around a first axis 2, and the first axis 2 is perpendicular to the cutting plane 1; the motor 14 is used to drive the output shaft 12 to rotate, and the rated input power of the motor 14 is greater than or equal to 800W, or greater than or equal to 900W, or greater than or equal to 1000W, for example, it can be 1200W. The transmission mechanism 13 is arranged between the output shaft 12 and the cutting member 11, and is used to transmit the power of the output shaft 12 to the cutting member 11. In this case, the cutting member 11 is fixed on a supporting shaft, and the transmission mechanism 13 is arranged between the output shaft 12 and the supporting shaft; or, the transmission mechanism 13 is arranged between the output shaft 12 and the motor shaft, and is used to transmit the driving force of the motor 14 to the output shaft 12. In this case, the cutting member 11 is directly fixed on the output shaft 12. The housing 15 is used to accommodate at least the motor 14 and the transmission mechanism 13. The first bottom plate 20 is used as a support platform for the electric tool. The cutting mechanism 10 is arranged to be able to rotate relative to the first bottom plate 20 around the second axis 3 (rotation axis), and the second axis 3 is perpendicular to the first axis 2. A first workpiece contact plane 22 for contacting a workpiece is formed on the first bottom plate 20. The first bottom plate 20 has a first opening 21, and the cutting member 11 can pass through the first opening 21 and protrude downward from the first workpiece contact plane 22.

[0038] The housing 15 includes a first housing 151, a second housing 152 and a grip housing 153. The first housing 151 is used to accommodate the motor 14, and the second housing 152 is used to accommodate the transmission mechanism 13. The first housing 151 and the second housing 152 are detachably connected, and a shaft lock 154 is provided between the first housing 151 and the second housing 152, specifically provided between the output shaft 12 and the second housing 152. The shaft lock 154 can cooperate with the flat structure on the output shaft 12 to facilitate the disassembly of the cutting member 11. The grip housing 153 is connected to the first housing 151 and / or the second housing 152, and the grip housing 153 is U-shaped, and is formed with a grip portion 1531 for the user to grip. The grip 1531 is provided with a trigger switch and a safety switch, wherein the trigger switch is movably connected to the grip 1531, and when the user holds the grip 1531, the trigger switch can be triggered to start or shut down the motor 14; the safety switch is provided on the left or right side of the grip 1531, and is used to lock the trigger switch in a position where it is not triggered by the user, that is, the trigger switch can only be triggered when the safety switch is pressed, that is, two actions are required before the motor 14 can be started. In this way, accidental starting of the power tool is avoided, and the user is protected from injury.

[0039] In this embodiment, a ball bearing is provided on the output shaft 12, which can stabilize the output shaft 12 when the output shaft 12 rotates at a high speed, so that the cutting element 11 can maintain cutting accuracy and flatness at a high rotation speed.

[0040] In this embodiment, the maximum cutting speed of the cutting element 11 is greater than or equal to 9000 rpm, or the maximum cutting speed of the cutting element 11 is greater than or equal to 9000 rpm and less than or equal to 13000 rpm, or the maximum cutting speed of the cutting element 11 is greater than or equal to 9500 rpm and less than or equal to 13000 rpm. For example, the maximum cutting speed of the cutting element 11 can be 9000 rpm, 10000 rpm, 11000 rpm, 12000 rpm or 13000 rpm. The rotation speed is greatly improved, so that the cut section is smooth and burr-free.

[0041] The cutting member 11 is a saw blade, and the diameter of the saw blade is greater than or equal to 100 mm and less than or equal to 150 mm, for example, it can be 125 mm.

[0042] The cutting depth of the cutting member 11 is adjusted by the depth adjustment bracket 16. The maximum cutting depth of the cutting member 11 is greater than or equal to 30 mm and less than or equal to 60 mm, for example, it can reach 38 mm, or 40 mm, or 50 mm or 55 mm, etc. The cutting depth is large, and the workpiece to be cut can be cut in one go. The structure and adjustment principle of the depth adjustment bracket 16 are all prior art and will not be described in detail here.

[0043] A groove 155 is provided on the casing 15, and part of the depth adjustment bracket 16 is embedded in the groove 155, so that the position of the depth adjustment bracket 16 is moved forward, so that the holding shell 153 can be as close to the saw blade as possible, improving the comfort of holding the holding part 1531, and at the same time preventing the fingers from touching the depth adjustment bracket 16 when holding.

[0044] The electric tool also includes a shield assembly 50, which includes a fixed shield 51 and a movable shield 52, wherein the fixed shield 51 is fixedly arranged on the upper side of the cutting member 11 relative to the housing 15, and covers the upper half of the cutting member 11 along the circumferential direction of the cutting member 11. Specifically, the fixed shield 51 covers the upper half of the cutting member 11 along the radial direction of the cutting member 11. The movable shield 52 can rotate relative to the housing 15 with the third axis 4 as the axis, and the third axis 4 is parallel to or coincides with the first axis 2. When the movable shield 52 rotates relative to the housing 15, displacement occurs between the movable shield 52 and the fixed shield 51, so that the cutting member 11 is exposed. As the movable shield 52 rotates, the exposed portion of the cutting member 11 gradually increases. When the movable shield 52 moves to the top of the first base plate 20, the cutting member 11 can be used for cutting. The shield assembly 50 is formed with a main dust outlet 54 and an auxiliary dust outlet 53. The main dust outlet 54 is located at the front side of the power tool, and the auxiliary dust outlet 53 is located at the rear side of the power tool. Both the main dust outlet and the auxiliary dust outlet are used to discharge the chips generated by cutting when the power tool is cutting. Most of the chips are discharged through the main dust outlet 54, and a small amount of chips are discharged through the auxiliary dust outlet 53. In the prior art, chips will splash out at the auxiliary dust outlet 53, affecting the operator. In this embodiment, a shielding portion 161 facing the auxiliary dust outlet 53 is provided on the depth adjustment bracket 16, and the upper end surface 1611 of the shielding portion 161 is higher than the auxiliary dust outlet 53 to avoid chip splashing.

[0045] Reference Figure 5 and Figure 6The electric tool further comprises a second base plate 30, which is located at the lower end of the first base plate 20 and is detachably connected to the first base plate 20. In this embodiment, a mounting portion is provided on the first base plate 20, and the mounting portion can be a bolt 40 or a screw hole. For example, the first base plate 20 and the second base plate 30 can be detachably connected by a bolt 40. Further, a positioning block 36 is provided on the second base plate 30, and the bolt 40 is connected to the positioning block 36. Further, an anti-slip nut 41 is sleeved on the head end of the bolt 40 to prevent the bolt from accidentally falling off. A second workpiece contact plane 38 for contacting with a workpiece is formed on the second base plate 30. The second base plate 30 has a second opening 31, and the cutting piece 11 can pass through the second opening 31 and protrude downward from the second workpiece contact plane 38. Circular holes 32 are provided on the second base plate 30 at both ends of the second opening 31, and the circular holes 32 can be used as visual holes for observing the cutting situation during the cutting action. The area of ​​the second base plate 30 is larger than that of the first base plate 20. The second base plate 30 can be used as a reference plate, and the operator does not need to make a reference plate on site, which saves manpower and time and improves work efficiency. It is understandable that when using the power tool for cutting, it is possible to choose whether to install the second base plate 30 according to the needs of the operation. When the second base plate 30 is not required to be installed, the first workpiece contact plane 22 of the first base plate 20 contacts the workpiece to be cut; when the second base plate 30 is required to be installed, the second workpiece contact plane 38 of the second base plate 30 contacts the workpiece to be cut.

[0046] The second bottom plate 30 is provided with a positioning slider 33 and a slider fixing member 35. The positioning slider 33 is located below the second bottom plate 30. The positioning slider 33 is arranged to extend along the second axis 3 and to slide relative to the second bottom plate 30 along the first axis 2. Specifically, the positioning slider 33 is provided with slide grooves at both ends along the second axis 3, and the two slide grooves are respectively slidably connected to the two side edges of the second bottom plate 30. The slider fixing member 35 is arranged to fix the positioning slider 33 after the positioning slider 33 slides into place. Specifically, a slideway 34 extending along the first axis 2 is provided through the second bottom plate 30, and the slider fixing member 35 can slide along the slideway 34 to match the position of the positioning slider 33 and fix the positioning slider 33 at the target position. By providing the positioning slider 33, it can be used as an auxiliary backing during the cutting operation, so that the operator can quickly adjust the size. Furthermore, a scale extending along the sliding direction of the positioning slider 33 is provided on the second bottom plate 30 to further facilitate the operator to quickly adjust the size.

[0047] Since the second bottom plate 30 has a relatively large area, a plurality of weight-reducing holes 37 are provided on the second bottom plate 30 in order to reduce the weight of the second bottom plate 30 .

[0048] The total weight of the power tool is less than or equal to 3kg, for example, it can be 2.8kg, or 2.5kg, etc. Compared with the traditional electric circular saw and the traditional marble machine, the weight is reduced, the overall weight is lighter, and the operation is more comfortable.

[0049] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. An electric tool comprising: A cutting member (11) extending in a cutting plane (1); An output shaft (12) for mounting the cutting element (11); a motor (14) for driving the output shaft (12) to rotate around the first axis (2); A housing (15), at least for accommodating the motor (14); a first bottom plate (20), the housing (15) being configured to be rotatable about a second axis (3) relative to the first bottom plate (20); Features: The maximum cutting speed of the cutting element (11) is greater than or equal to 9000 rpm.

2. The electric tool according to claim 1, characterized in that: The cutting member (11) is a saw blade, and the diameter of the saw blade is greater than or equal to 100 mm and less than or equal to 150 mm.

3. The electric tool according to claim 1, characterized in that: The maximum cutting depth of the cutting piece (11) is greater than or equal to 30 mm and less than or equal to 60 mm.

4. The electric tool according to claim 1, characterized in that: The rated input power of the motor (14) is greater than or equal to 800W.

5. The electric tool according to claim 1, characterized in that: The weight of the electric tool is less than or equal to 3 kg.

6. The electric tool according to claim 1, characterized in that: It also includes a second bottom plate (30), which is located at the lower end of the first bottom plate (20) and is detachably connected to the first bottom plate (20).

7. The electric tool according to claim 6, characterized in that: A positioning slider (33) and a slider fixing member (35) are provided on the second bottom plate (30); the positioning slider (33) is located below the second bottom plate (30); the positioning slider (33) is arranged to extend along the direction of the second axis (3) and to slide relative to the second bottom plate (30) along the direction of the first axis (2); and the slider fixing member (35) is arranged to fix the positioning slider (33) after the positioning slider (33) slides into place.

8. The electric tool according to claim 7, characterized in that: The second bottom plate (30) is provided with a scale extending along the sliding direction of the positioning slide block (33).

9. The electric tool according to claim 1, characterized in that: It also comprises a depth adjustment bracket (16), wherein the depth adjustment bracket (16) is configured to adjust the cutting depth of the cutting member (11), and the housing (15) is provided with a groove (155), and a portion of the depth adjustment bracket (16) is embedded in the groove (155).

10. The electric tool according to claim 9, characterized in that: The invention also comprises a shield assembly (50), wherein the shield assembly (50) is used to cover at least a part of the cutting piece (11), the shield assembly (50) has a main dust outlet (54) and an auxiliary dust outlet (53), and the depth adjustment bracket (16) is provided with a shielding portion (161) facing the auxiliary dust outlet (53), and the upper end surface (1611) of the shielding portion (161) is higher than the auxiliary dust outlet (53).

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