Angle grinder and electric tool

Abstract

The utility model discloses an angle grinder and an electric tool. The angle grinder comprises a shell; the output shaft is arranged to be capable of rotating relative to the shell; the motor is arranged to drive the output shaft to rotate; the transmission assembly is used for realizing power transmission between the motor and the output shaft; the housing includes: a head configured to mount the output shaft; the battery pack combination part is arranged to be detachably combined with the battery pack; the connecting part is used for connecting the head part and the battery pack combining part along the transverse direction; the connecting part comprises a motor shell part which is arranged to accommodate at least part of the motor, and the motor is at least partially arranged in the motor shell part in the transverse direction; the handle part is arranged to be held by a user; in the transverse direction, the handle part is arranged between the motor shell part and the battery pack combination part, and the difference value between the perimeter of the motor shell part and the perimeter of the handle part is larger than or equal to 62 mm. The diameter of the handle part can be effectively reduced, so that a user can hold the handle conveniently, and the use comfort is improved.

Description

Technical Field

[0001] The present application relates to a power tool, in particular to an angle grinder and an electric tool. Background Art

[0002] In daily production and life, handheld power tools play a very important role. Handheld power tools include but are not limited to hand drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, etc. Hand drills and impact drills can be equipped with drill bits of different diameters to drill holes in objects, impact wrenches are used to tighten bolts and nuts, impact screwdrivers usually loosen or tighten screws, etc., and angle grinders can grind and cut objects. The use of handheld power tools can improve work efficiency and reduce labor intensity. Among them, DC angle grinders are a commonly used type of angle grinder. During the operation of the DC angle grinder, its vibration is large, so the user needs to hold the DC angle grinder tightly. Because the motor of the DC angle grinder is set in the handle, the diameter of the handle is large, resulting in poor comfort for the user to hold.

[0003] This section provides background information related to the present application which is not necessarily prior art. Utility Model Content

[0004] An object of the present invention is to solve or at least alleviate some or all of the above problems.

[0005] To achieve this goal, this application adopts the following technical solutions:

[0006] An angle grinder, comprising:

[0007] case;

[0008] An output shaft is configured to be rotatable relative to the housing;

[0009] A motor, configured to drive the output shaft to rotate;

[0010] A transmission assembly, which realizes power transmission between the motor and the output shaft;

[0011] The housing comprises:

[0012] A head portion configured to mount the output shaft;

[0013] A battery pack combination portion, configured to be detachably combined with the battery pack;

[0014] A connecting portion, connecting the head portion and the battery pack connecting portion in a transverse direction;

[0015] The connecting portion comprises:

[0016] A motor housing portion, configured to accommodate at least a portion of the motor, wherein the motor is at least partially disposed in the motor housing portion along the transverse direction;

[0017] A handle portion, configured for a user to hold;

[0018] In the transverse direction, the handle portion is disposed between the motor housing portion and the battery pack coupling portion, and a difference between a circumference of the motor housing portion and a circumference of the handle portion is greater than or equal to 62 mm.

[0019] In some embodiments, the circumference of the handle portion is less than or equal to 138 mm.

[0020] In some embodiments, the circumference of the handle portion is less than or equal to 135 mm.

[0021] In some embodiments, a ratio of a circumference of the handle portion to a circumference of the motor housing portion is less than or equal to 0.68.

[0022] In some embodiments, the length of the shell along the transverse direction is less than or equal to 298 mm.

[0023] In some embodiments, a control switch is further included, and the control switch is disposed in the motor housing portion or inside the motor housing portion at the connection between the motor housing portion and the handle portion.

[0024] In some embodiments, a control switch is further included, and the control switch is disposed in the handle portion.

[0025] In some embodiments, a circuit board is also included, and the circuit board is disposed on the battery pack coupling portion.

[0026] In some embodiments, the maximum output power of the angle grinder is greater than or equal to 700W.

[0027] An electric tool, comprising:

[0028] case;

[0029] An output shaft is configured to be rotatable relative to the housing;

[0030] A motor, configured to drive the output shaft to rotate;

[0031] A transmission assembly, which realizes power transmission between the motor and the output shaft;

[0032] The housing comprises:

[0033] A head portion configured to mount the output shaft;

[0034] A battery pack combination portion, configured to be detachably combined with the battery pack;

[0035] A connecting portion, connecting the head portion and the battery pack connecting portion in a transverse direction;

[0036] The connecting portion comprises:

[0037] A motor housing portion, configured to accommodate at least a portion of the motor, wherein the motor is at least partially disposed in the motor housing portion along the transverse direction;

[0038] A handle portion, configured for a user to hold;

[0039] In the transverse direction, the handle portion is disposed between the motor housing portion and the battery pack coupling portion, and a difference between a circumference of the motor housing portion and a circumference of the handle portion is greater than or equal to 62 mm.

[0040] The benefits of this application are:

[0041] The present application provides an angle grinder, wherein the housing of the angle grinder includes a head, a battery pack coupling portion, and a coupling portion connecting the head and the battery pack coupling portion. The coupling portion includes a motor housing portion and a handle portion. The handle portion is located between the motor housing portion and the battery pack coupling portion, and the difference between the circumference of the motor housing portion and the circumference of the handle portion is greater than or equal to 62 mm. By accommodating at least part of the motor in the motor housing portion and installing the battery pack at the battery pack coupling portion, the diameter of the handle portion can be effectively reduced, thereby facilitating the user's grip and improving the comfort of use.

[0042] The present application provides an electric tool, wherein the housing of the electric tool includes a head, a connecting portion, and a battery pack coupling portion. The connecting portion includes a motor housing portion and a handle portion. The handle portion is located between the motor housing portion and the battery pack coupling portion, and the difference between the circumference of the motor housing portion and the circumference of the handle portion is greater than or equal to 62 mm. By accommodating at least part of the motor in the motor housing portion and installing the battery pack at the battery pack coupling portion, the diameter of the handle portion can be effectively reduced, thereby facilitating the user's grip and improving the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of an angle grinder;

[0044] Figure 2 It is a cross-sectional view of an angle grinder;

[0045] Figure 3 It is a schematic diagram of the internal structure of an angle grinder;

[0046] Figure 4 is another schematic diagram of the internal structure of an angle grinder;

[0047] Figure 5 is a schematic diagram of a housing in an angle grinder;

[0048] Figure 6 yes Figure 5 Middle AA view;

[0049] Figure 7 It is a schematic diagram of the internal structure of a housing in an angle grinder;

[0050] Figure 8 The present invention is another schematic diagram of the internal structure of an angle grinder;

[0051] Fig. 9 yes Figure 8 A partial enlarged view of the middle A;

[0052] Fig.10 is another schematic diagram of an angle grinder.

[0053] In the figure:

[0054] 100. Angle grinder; 1. Housing; 11. Head; 12. Connecting part; 121. Motor housing; 122. Handle; 1221. Anti-slip structure; 13. Battery pack joint; 131. Air inlet rib; 132. Positioning rib; 133. Speed ​​regulating disk position label; 2. Output shaft; 21. Working accessories; 3. Motor; 4. Transmission assembly; 5. Control switch; 51. Pull rod; 52. Reset spring; 6. Control box; 61. Circuit board; 62. Raised fin; 7. Battery pack. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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 the 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.

[0062] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0063] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

[0064] In daily production and life, handheld power tools play a very important role. Handheld power tools include but are not limited to hand drills, impact drills, impact wrenches, impact screwdrivers, angle grinders, etc. Hand drills and impact drills can be equipped with drill bits of different diameters to drill holes on objects, impact wrenches are used to tighten bolts and nuts, impact screwdrivers usually loosen or tighten screws, etc., and angle grinders can grind and cut objects. The use of handheld power tools can improve work efficiency and reduce labor intensity.

[0065] Angle grinders usually include DC angle grinders that use direct current and AC angle grinders that use alternating current. During the operation of a DC angle grinder, there is no need to connect wires, so it can be well adapted to various occasions. Figure 1-Figure 2 As shown, the angle grinder 100 includes: a housing 1 , an output shaft 2 , a motor 3 and a transmission assembly 4 .

[0066] The output shaft 2 is configured to be rotatable relative to the housing 1, and the motor 3 is configured to drive the output shaft 2 to rotate; the transmission assembly 4 realizes the transmission of power between the motor 3 and the output shaft 2. During operation, the motor 3 drives the transmission assembly 4, and the transmission assembly 4 drives the output shaft 2 to rotate relative to the housing 1. The output shaft 2 drives the working attachment 21 located thereon to perform different tasks. In some embodiments, different materials can be cut by replacing different types of cutting wheels, and when in use, it can be adjusted according to the needs of on-site use.

[0067] like Figure 1 As shown, the housing 1 includes a head 11, a battery pack coupling portion 13 and a connecting portion 12 connected in sequence. The head 11 is configured to mount the output shaft 2. The battery pack coupling portion 13 is configured to be detachably coupled to the battery pack 7. When in use, the user can carry multiple charged battery packs 7, and after the battery pack 7 is used up, the battery pack 7 can be disassembled and replaced to ensure the efficiency of the construction.

[0068] The DC angle grinder vibrates greatly during operation, so the user needs to hold the DC angle grinder tightly. Since the motor 3 of the DC angle grinder is arranged in the handle, the diameter of the handle is large, resulting in poor comfort for the user to hold.

[0069] In order to solve the above problems, Figure 1-Figure 10As shown, the present application provides an angle grinder 100. The connecting portion 12 of the housing 1 connects the head 11 and the battery pack coupling portion 13 in the transverse direction; the connecting portion 12 includes a motor housing portion 121 and a handle portion 122. The motor housing portion 121 is configured to accommodate at least part of the motor 3, and the motor 3 is at least partially disposed in the motor housing portion 121 in the transverse direction; the handle portion 122 is configured for the user to hold. In the transverse direction, the handle portion 122 is disposed between the motor housing portion 121 and the battery pack coupling portion 13, and the difference between the circumference of the motor housing portion 121 and the circumference of the handle portion 122 is greater than or equal to 62 mm. The transverse direction refers to the extension direction of the housing 1.

[0070] By designing the connecting portion 12 to be a motor housing portion 121 with a larger diameter and a handle portion 122 with a smaller diameter, the motor 3 is easily arranged while the diameter of the handle portion 122 is reduced, thereby making it easier for users to hold and improving the comfort of use.

[0071] In some embodiments, the circumference of the handle portion 122 is less than or equal to 138 mm. The design is based on the circumference of an adult's hand. By limiting the circumference of the handle portion 122, the manufactured angle grinder 100 conforms to the ergonomic design. Similarly, the circumference of the motor housing portion 121 is less than or equal to 200 mm, and the circumference of the motor housing portion 121 can be 199 mm, 198 mm, 197 mm, etc., without making too many restrictions here.

[0072] In some embodiments, the circumference of the handle portion 122 is less than or equal to 135 mm. The circumference of the handle portion 122 can be 134 mm, 133 mm, 132 mm, etc. In the actual manufacturing process, the appropriate size can be selected according to the hand length of adults in different countries, and no excessive restrictions are made here. Preferably, the length L2 of the handle portion 122 is equal to the width of four fingers of an adult.

[0073] In some embodiments, the ratio of the circumference of the handle portion 122 to the circumference of the motor housing portion 121 is less than or equal to 0.68. The ratio of the circumference of the handle portion 122 to the circumference of the motor housing portion 121 can be 0.68, 0.67, 0.66, 0.65... Since the motor housing portion 121 needs to accommodate at least part of the motor 3. The diameter of the motor 3 determines the output power of the motor 3. Therefore, according to the working environment of the angle grinder 100, the type and size of the motor 3 are determined, and then the diameter of the motor housing portion 121 is determined according to the motor 3. By limiting the ratio between the circumference of the handle portion 122 and the circumference of the motor housing portion 121, it is possible to ensure that the handle portion 122 and the motor housing portion 121 are reasonably designed while taking into account the installation of the motor 3.

[0074] In some embodiments, the ratio of the diameter of the motor 3 to the circumference of the handle 122 is greater than or equal to 0.35. The ratio of the diameter of the motor 3 to the circumference of the handle 122 can be 0.35, 0.36, 0.37, ... By limiting the ratio of the diameter of the motor 3 to the circumference of the handle 122, the diameter of the motor 3 can be guaranteed while the handle 122 is easy to hold, thereby ensuring that the output power of the motor 3 can meet the requirements of on-site use.

[0075] In some embodiments, the ratio of the height of the motor 3 to the circumference of the handle 122 is greater than or equal to 0.21. The ratio of the height of the motor 3 to the circumference of the handle 122 can be 0.21, 0.22, 0.23, ... By limiting the ratio of the height of the motor 3 to the circumference of the handle 122, the length of the space occupied by the motor 3 is limited, so as to avoid the length of the space occupied by the motor 3 being too long, which causes the overall length of the angle grinder 100 to be too long and inconvenient to use.

[0076] like Figure 2 As shown, in some embodiments, the transverse length L1 of the housing 1 is less than or equal to 298 mm. The transverse length L1 of the housing 1 may be 297 mm, 296 mm, 295 mm, etc. By limiting the transverse length L1 of the housing 1, the volume and weight of the angle grinder 100 can be further reduced, and it is easier to hold, thereby improving market competitiveness. It is worth noting that the transverse length L1 of the housing 1 does not include the size of the battery pack 7.

[0077] like Figure 8 As shown, in some embodiments, an anti-skid structure 1221 is provided on the surface of the handle portion 122. The anti-skid structure 1221 may be an anti-skid pattern, an anti-skid protrusion and / or an anti-skid groove. By providing the anti-skid structure 1221, the friction coefficient of the handle portion 122 can be increased, so that the friction between the human hand and the handle portion 122 can be increased when in use.

[0078] like Figure 4 As shown, in some embodiments, the battery pack 7 and the connecting portion 12 are arranged at an acute angle or a right angle. For example, the battery pack 7 is inserted obliquely on the battery pack coupling portion 13, and the angle α between the battery pack 7 and the connecting portion 12 is greater than or equal to 50 degrees and less than or equal to 80 degrees. Through the above arrangement, the overall length of the angle grinder 100 can be minimized, and at the same time, it can be ensured that the user's hand has a certain amount of space for movement when holding it.

[0079] like Figure 2-Figure 3As shown, in some embodiments, the angle grinder 100 further includes a control switch 5, which is located at the motor housing portion 121, and the main body length L4 of the control switch 5 is less than or equal to 20 mm. The main body length L4 of the control switch 5 can be 20 mm, 19 mm, 18 mm, etc. The switch-on stroke of the control switch 5 is less than or equal to 3 mm. The control switch 5 is triggered by a pull rod 51, which is located in the motor housing portion 121, and a reset spring 52 is located at the rear side of the movement area of ​​the pull rod 51, so as to avoid the reset spring 52 occupying the installation position of the motor 3, which is convenient for operation and ensures the compactness of the whole machine.

[0080] In some embodiments, the angle grinder 100 further includes a control switch 5, which is disposed in the motor housing 121 or disposed inside the motor housing 121 at the connection between the motor housing 121 and the handle 122. By providing the control switch 5, it is convenient for the user to operate. When in use, the motor 3 is controlled to rotate by the control switch 5, and can be turned off directly by the control switch 5 after use. In addition, by integrating the control switch 5 inside the motor housing 121 or the connection between the motor housing 121 and the handle 122, it is prevented from leaking out and causing accidental touching during operation, and it is convenient to operate. Such a setting also prevents the circumference of the motor housing 121 from increasing due to the control switch.

[0081] like Fig.10 As shown, in some embodiments, the angle grinder 100 further includes a control switch 5, which is disposed in the handle portion 122. Through the above arrangement, the control switch 5 is disposed in the handle portion 122, thereby reducing the space occupied by the motor housing portion 121, shortening the horizontal length L3 of the motor housing portion 121, and achieving the purpose of further shortening the length of the entire machine.

[0082] In some embodiments, the control switch 5 is a signal switch, and the main body of the signal switch overlaps with most of the rear bearing of the motor 3, which can further reduce the occupied space of the control switch 5 and ensure the compactness of the angle grinder 100. The switch-on stroke of the signal switch is less than or equal to 2.5 mm, which can ensure that the control switch 5 will not be accidentally shut down or unable to start due to vibration during operation.

[0083] like Figure 1-Figure 2 As shown, in some embodiments, the angle grinder 100 further includes a circuit board 61, which is disposed at the battery pack coupling portion 13. The circuit board 61 can control the operation and shutdown of the angle grinder 100 and the rotation speed output by the angle grinder 100, so that the user can adjust the output power of the angle grinder 100 according to the different materials of the cutting object.

[0084] like Figure 2 , Figure 3 and Figure 7As shown, in some embodiments, the circuit board 61 is encapsulated in the control box 6, and a plurality of protruding fins 62 are arranged on the left and right sides of the control box 6. The plurality of protruding fins 62 are connected one by one with the plurality of air inlet ribs 131 of the battery pack joint 13 to form an air duct, and the air inlet ribs 131 are aligned with the protruding fins 62. Through the above arrangement, the protruding fins 62 can exchange heat with the outside air, thereby quickly discharging the heat generated by the circuit board 61, and ensuring that the circuit board 61 can work normally.

[0085] like Figure 3 and Figure 6 As shown, in some embodiments, an independent positioning rib 132 is provided on the side of the air inlet rib 131 facing the handle portion 122 , and the positioning rib 132 is plugged into the raised fins 62 in a one-to-one correspondence to position the control box 6 , thereby facilitating the installation of the control box 6 .

[0086] In some embodiments, the maximum output power of the angle grinder 100 is greater than or equal to 700 W. The maximum output power of the angle grinder 100 may be 700 W, 710 W, 720 W, ... By limiting the maximum output power of the angle grinder 100, it is possible to ensure that the angle grinder 100 is easy to use and the output power can meet the needs of use in various occasions.

[0087] like Figure 8 and Fig. 9 As shown, in some embodiments, the speed regulating disc position label 133 is press-fitted inside the housing 1 to prevent the speed regulating disc position label 133 from falling off.

[0088] In some embodiments, there is also provided an electric tool, including: a housing 1, an output shaft 2, a motor 3 and a transmission assembly 4. The output shaft 2 is configured to be rotatable relative to the housing 1. The motor 3 is configured to drive the output shaft 2 to rotate; the transmission assembly 4 realizes the transmission of power between the motor 3 and the output shaft 2. When working, the motor 3 drives the transmission assembly 4, and the transmission assembly 4 drives the output shaft 2 to rotate relative to the housing 1. The output shaft 2 drives the working attachment 21 located thereon to perform different tasks. In some embodiments, different materials can be cut by replacing different types of cutting wheels, and when in use, it can be adjusted according to the needs of on-site use.

[0089] The housing 1 includes a head 11, a connection portion 12 and a battery pack connection portion 13 which are connected in sequence. The head 11 is configured to mount the output shaft 2; the battery pack connection portion 13 is configured to be detachably connected to the battery pack 7; the connection portion 12 connects the head 11 and the battery pack connection portion 13 in the transverse direction. The battery pack connection portion 13 is configured to be detachably connected to the battery pack 7. When in use, the user can carry multiple rechargeable battery packs 7. After the battery pack 7 is used up, it can be disassembled and replaced to ensure the efficiency of the construction.

[0090] The connecting portion 12 includes a motor housing portion 121 and a handle portion 122. The motor housing portion 121 is configured to accommodate at least part of the motor 3, and the motor 3 is at least partially disposed in the motor housing portion 121 in the horizontal direction. The handle portion 122 is configured for the user to hold; in the horizontal direction, the handle portion 122 is disposed between the motor housing portion 121 and the battery pack coupling portion 13, and the difference between the circumference of the motor housing portion 121 and the circumference of the handle portion 122 is greater than or equal to 62 mm. By designing the connecting portion 12 as a motor housing portion 121 with a larger diameter and a handle portion 122 with a smaller diameter, the motor 3 is easily arranged while reducing the diameter of the handle portion 122, thereby facilitating the user's holding and improving the comfort of use.

[0091] In some embodiments, the weight of the angle grinder 100 is less than or equal to 1.31 kg. The weight of the angle grinder 100 may be 1.31 kg, 1.30 kg, 1.29 kg, etc. By designing the angle grinder 100 to be lightweight, the weight of the angle grinder 100 is reduced, making it easier for users to use.

[0092] In one embodiment, Figure 1-Figure 10 As shown, the present application provides an angle grinder. The connection portion 12 of the angle grinder 100 includes: a motor housing portion 121 and a handle portion 122. Among them, the motor housing portion 121 is configured to accommodate at least part of the motor 3, and the motor 3 is at least partially arranged in the motor housing portion 121 along the horizontal direction; the handle portion 122 is configured for the user to hold. In the horizontal direction, the handle portion 122 is arranged between the motor housing portion 121 and the battery pack coupling portion 13, and the ratio of the maximum output power of the angle grinder 100 to the horizontal length L1 of the housing 1 is greater than or equal to 2W / mm. By accommodating at least part of the motor 3 in the motor housing portion 121 and installing the battery pack 7 at the battery pack coupling portion 13, the diameter of the handle can be effectively reduced. By limiting the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122, it is convenient for the user to hold it while ensuring the output power of the angle grinder 100, improving the comfort of use, and thus ensuring work efficiency.

[0093] In some embodiments, the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle 122 is greater than or equal to 5.2 W / mm. The ratio of the maximum output power of the angle grinder 100 to the circumference of the handle 122 can be 5.2 W / mm, 5.3 W / mm, 5.4 W / mm, etc. The ratio of the maximum output power of the angle grinder 100 to the circumference of the handle 122 reflects the power output efficiency of the motor 3, ensuring that the handle 122 is easy to hold and the output power of the angle grinder 100 is sufficient to meet the needs of construction.

[0094] In some embodiments, the ratio of the maximum output power of the angle grinder 100 to the circumference of the motor housing 121 is greater than or equal to 3.2 W / mm. The ratio of the maximum output power of the angle grinder 100 to the circumference of the motor housing 121 may be 3.2 W / m, 3.3 W / m, 3.4 W / m, ... Since at least part of the motor 3 is located in the motor housing 121, the circumference of the motor housing 121 limits the diameter of the motor 3. By limiting the ratio of the maximum output power of the angle grinder 100 to the circumference of the motor housing 121, the output power of the motor 3 is ensured, while limiting the circumference of the motor housing 121, so as to ensure that the angle grinder 100 is compact and easy to carry.

[0095] like Figure 5 As shown, in some embodiments, the ratio of the maximum output power of the angle grinder 100 to the length L1 of the housing 1 in the horizontal direction is greater than or equal to 2.3 W / mm. The ratio of the maximum output power of the angle grinder 100 to the length L1 of the housing 1 in the horizontal direction may be 2.3 W / mm, 2.4 W / mm, 2.5 W / mm, ... Since the maximum output power of the angle grinder 100 depends on the output power of the motor 3, the motor 3 is installed in the housing 1. Therefore, by limiting the ratio of the maximum output power of the angle grinder 100 to the length L1 of the housing 1 in the horizontal direction, the output power of the angle grinder 100 is guaranteed while avoiding the housing 1 from being too long, so that the angle grinder 100 is compact and easy to carry.

[0096] In some embodiments, the ratio of the maximum output power of the angle grinder 100 to the volume of the motor 3 is greater than or equal to 10W / cm3. Through the above definition, the maximum output power of the angle grinder 100 is guaranteed while the volume of the motor 3 is small, thereby improving the compactness of the angle grinder 100.

[0097] like Figure 5 As shown, in some embodiments, the ratio of the horizontal length L2 of the handle portion 122 to the horizontal length L1 of the housing 1 is greater than or equal to 0.26. The ratio of the horizontal length L2 of the handle portion 122 to the horizontal length L1 of the housing 1 can be 0.26, 0.27, 0.28, etc. Since the handle portion 122 is the position where the user holds the angle grinder 100, it is necessary to ensure that the horizontal length L2 of the handle portion 122 can accommodate four fingers except the thumb. Of course, the horizontal length L2 of the handle portion 122 does not need to be too long, and it only needs to be convenient for most users to use.

[0098] like Figure 3As shown, in some embodiments, the angle β formed by the intersection of the extension plane of the circuit board 61 and the transverse inclination is greater than or equal to 45 degrees and less than or equal to 75 degrees. Since the circuit board 61 is installed at the battery pack joint 13, the installation of the circuit board 61 is facilitated by limiting the angle formed by the intersection of the extension plane of the circuit board 61 and the transverse inclination, so as to avoid the circuit board 61 occupying a large space and causing the volume of the housing 1 to increase.

[0099] like Figure 5 As shown, in some embodiments, the ratio of the length L3 of the motor housing portion 121 along the lateral direction to the length L2 of the handle portion 122 along the lateral direction is greater than or equal to 0.6. The ratio of the length L3 of the motor housing portion 121 to the length L2 of the handle portion 122 along the lateral direction may be 0.6, 0.61, 0.62, 0.63, ... Since the motor housing portion 121 and the handle portion 122 together constitute the connecting portion 12. The motor housing portion 121 is used to install the motor 3, and the handle portion 122 is used for the user to hold. Therefore, by reasonably allocating the length L3 of the motor housing portion 121 and the length L2 of the handle portion 122 along the lateral direction, it is convenient for the user to hold and use the motor 3 while facilitating the installation of the motor 3.

[0100] In some embodiments, an angle grinder 100 is also provided, including: a housing 1, an output shaft 2, a motor 3 and a transmission assembly 4. Among them, the output shaft 2 is configured to be rotatable relative to the housing 1. The motor 3 is configured to drive the output shaft 2 to rotate; the transmission assembly 4 realizes the transmission of power between the motor 3 and the output shaft 2. When working, the motor 3 drives the transmission assembly 4, and the transmission assembly 4 drives the output shaft 2 to rotate relative to the housing 1. The output shaft 2 drives the working attachment 21 located thereon to perform different tasks. In some embodiments, different materials can be cut by replacing different types of cutting wheels, and when in use, it can be adjusted according to the needs of on-site use.

[0101] like Figure 1 As shown, the housing 1 includes a head 11, a connection portion 12 and a battery pack coupling portion 13 connected in sequence. The head 11 is configured to mount the output shaft 2; the battery pack coupling portion 13 is configured to be detachably coupled to the battery pack 7; the connection portion 12 connects the head 11 and the battery pack coupling portion 13 in the transverse direction. The battery pack coupling portion 13 is configured to be detachably coupled to the battery pack 7. When in use, the user can carry multiple rechargeable battery packs 7. After the battery pack 7 is used up, it can be disassembled and replaced to ensure the efficiency of the construction.

[0102] like Figure 1 and Figure 5As shown, the connection part 12 includes a motor housing part 121 and a handle part 122. The motor housing part 121 is configured to accommodate at least part of the motor 3, and the motor 3 is at least partially arranged in the motor housing part 121 in the horizontal direction. The handle part 122 is configured for the user to hold; in the horizontal direction, the handle part 122 is arranged between the motor housing part 121 and the battery pack joint part 13, and the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle part 122 is greater than or equal to 5W / mm. By designing the connection part 12 as a motor housing part 121 with a larger diameter and a handle part 122 with a smaller diameter, it is convenient to arrange the motor 3 while reducing the diameter of the handle part 122, so as to facilitate the user to hold and improve the comfort of use. By limiting the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle part 122, it can be ensured that the output power of the angle grinder 100 can meet the user's use requirements while being convenient for the user to use.

[0103] 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 angle grinder, comprising: Housing (1); An output shaft (2) is arranged to be rotatable relative to the housing (1); A motor (3) configured to drive the output shaft (2) to rotate; A transmission assembly (4) for realizing power transmission between the motor (3) and the output shaft (2); Characterized in that the housing (1) comprises: A head (11) configured to mount the output shaft (2); A battery pack combining portion (13) configured to be detachably combined with the battery pack (7); A connecting portion (12) connecting the head portion (11) and the battery pack connecting portion (13) in a transverse direction; The connecting portion (12) comprises: A motor housing portion (121) is arranged to accommodate at least a portion of the motor (3), wherein the motor (3) is at least partially arranged in the motor housing portion (121) along the transverse direction; A handle portion (122) is configured to be held by a user; In the transverse direction, the handle portion (122) is arranged between the motor housing portion (121) and the battery pack coupling portion (13), and the difference between the circumference of the motor housing portion (121) and the circumference of the handle portion (122) is greater than or equal to 62 mm.

2. The angle grinder (100) according to claim 1, characterized in that: The circumference of the handle portion (122) is less than or equal to 138 mm.

3. The angle grinder (100) according to claim 1, characterized in that: The circumference of the handle portion (122) is less than or equal to 135 mm.

4. The angle grinder (100) according to claim 1, characterized in that: The ratio of the circumference of the handle portion (122) to the circumference of the motor housing portion (121) is less than or equal to 0.

68.

5. The angle grinder (100) according to claim 1, characterized in that: The length of the shell (1) along the transverse direction is less than or equal to 298 mm.

6. The angle grinder according to claim 1, characterized in that: It also includes a control switch (5), which is arranged in the motor housing portion (121) or in the interior of the motor housing portion (121) at the connection between the motor housing portion (121) and the handle portion (122).

7. The angle grinder according to claim 1, characterized in that: It also includes a control switch (5), wherein the control switch (5) is arranged in the handle portion (122).

8. The angle grinder according to claim 1, characterized in that: It also includes a circuit board (61), wherein the circuit board (61) is arranged on the battery pack combining portion (13).

9. The angle grinder according to claim 1, characterized in that: The maximum output power of the angle grinder (100) is greater than or equal to 700W.

10. An electric tool comprising: Housing (1); An output shaft (2) is arranged to be rotatable relative to the housing (1); A motor (3) configured to drive the output shaft (2) to rotate; A transmission assembly (4) for realizing power transmission between the motor (3) and the output shaft (2); Characterized in that the housing (1) comprises: A head (11) configured to mount the output shaft (2); A battery pack combining portion (13) configured to be detachably combined with the battery pack (7); A connecting portion (12) connecting the head portion (11) and the battery pack connecting portion (13) in a transverse direction; The connecting portion (12) comprises: A motor housing portion (121) is arranged to accommodate at least a portion of the motor (3), wherein the motor (3) is at least partially arranged in the motor housing portion (121) along the transverse direction; A handle portion (122) is configured to be held by a user; In the transverse direction, the handle portion (122) is arranged between the motor housing portion (121) and the battery pack coupling portion (13), and the difference between the circumference of the motor housing portion (121) and the circumference of the handle portion (122) is greater than or equal to 62 mm.

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