CN222200026U

CN222200026U - Angle grinders and power tools

Info

Publication number: CN222200026U
Application number: CN202421033992.3U
Authority: CN
Inventors: 童国明; 赵祥; 张仰庆
Original assignee: Nanjing Chervon Industry Co Ltd
Current assignee: Nanjing Chervon Industry Co Ltd
Priority date: 2024-05-13
Filing date: 2024-05-13
Publication date: 2024-12-20
Anticipated expiration: 2034-05-13

Abstract

The present application discloses an angle grinder and an electric tool, the angle grinder comprises a housing; an output shaft, which is arranged to be rotatable relative to the housing; a motor, which is arranged to drive the output shaft to rotate; a transmission assembly, which realizes the transmission of power between the motor and the output shaft; the housing comprises: a head, which is arranged to install the output shaft; a battery pack coupling portion, which is arranged to be detachably coupled to the battery pack; a connecting portion, which connects the head and the battery pack coupling portion in the transverse direction; the connecting portion comprises: a motor housing portion, which is arranged to accommodate at least part of the motor, and the motor is at least partially arranged in the motor housing portion in the transverse direction; a handle portion, which is arranged for the user to hold; in the transverse direction, the handle portion is arranged 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 62mm. The present application can effectively reduce the diameter of the handle portion, thereby facilitating the user to hold and improving the comfort of use.

Description

Angle grinder and electric tool

Technical Field

The application relates to a power tool, in particular to an angle grinder and an electric tool.

Background

In daily life, hand-held power tools play a very important role. Hand-held power tools include, but are not limited to, electric hand drills, impact wrenches, impact screwdrivers, angle grinders, and the like. The electric hand drill and the impact drill can be provided with drills with different diameters for drilling holes on an object, the impact wrench is used for screwing bolts and nuts, the impact screwdriver is used for screwing screws off or screwing screws, and the like, and the angle grinder can grind and cut the object. The handheld power tool can improve working efficiency and reduce labor intensity. Among them, a direct current angle grinder is a commonly used angle grinder. The dc angle grinder vibrates greatly during operation, so that a user needs to hold the dc angle grinder tightly. Because the motor of the direct current angle grinder is arranged in the handle, the diameter of the handle part is larger, and the holding comfort of a user is poor.

This section provides background information related to the application, which is not necessarily prior art.

Disclosure of utility model

It is an object of the present invention to solve or at least alleviate some or all of the above problems.

To achieve the purpose, the application adopts the following technical scheme:

An angle grinder, comprising:

a housing;

an output shaft provided rotatably with respect to the housing;

a motor arranged to drive the output shaft to rotate;

a transmission assembly for effecting transmission of power between the motor and the output shaft;

The housing includes:

a head arranged to mount the output shaft;

A battery pack coupling part configured to detachably couple the battery packs;

A connecting portion connecting the head portion and the battery pack coupling portion in a lateral direction;

the connection part includes:

A motor housing portion configured to house at least a portion of the motor, the motor being disposed at least partially within the motor housing portion in the transverse direction;

a handle portion configured to be held by a user;

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 62mm.

In some embodiments, the grip portion has a circumference of less than or equal to 138mm.

In some embodiments, the grip portion has a circumference of less than or equal to 135mm.

In some embodiments, the ratio of the perimeter of the handle portion to the perimeter of the motor housing portion is less than or equal to 0.68.

In some embodiments, the length of the housing in the transverse direction is less than or equal to 298mm.

In some embodiments, the motor housing further comprises a control switch disposed within the motor housing portion or within the motor housing portion at the junction of the motor housing portion and the handle portion.

In some embodiments, a control switch is also included, the control switch disposed in the handle portion.

In some embodiments, a circuit board is further included, the circuit board being disposed at the battery pack coupling portion.

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

A power tool, comprising:

a housing;

an output shaft provided rotatably with respect to the housing;

a motor arranged to drive the output shaft to rotate;

The housing includes:

a head arranged to mount the output shaft;

A battery pack coupling part configured to detachably couple the battery packs;

the connection part includes:

a handle portion configured to be held by a user;

The application has the advantages that:

The application provides an angle grinder, wherein a shell of the angle grinder comprises a head part, a battery pack combining part and a connecting part for connecting the head part and the battery pack combining part. The connecting portion includes a motor housing portion and a handle portion. Wherein the handle portion is located between the motor housing portion and the battery pack engaging 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 62mm. Through holding at least partial motor at motor housing portion, install battery package in battery package junction portion department, can effectively reduce the diameter of handle portion to the user of being convenient for grips, promotes the travelling comfort of use.

The application provides an electric tool, wherein a shell of the electric tool comprises a head part, a connecting part and a battery pack combining part. The connecting portion includes a motor housing portion and a handle portion. Wherein the handle portion is located between the motor housing portion and the battery pack engaging 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 62mm. Through holding at least partial motor at motor housing portion, install battery package in battery package junction portion department, can effectively reduce the diameter of handle portion to the user of being convenient for grips, promotes the travelling comfort of use.

Drawings

FIG. 1 is a schematic view of an angle grinder;

FIG. 2 is a cross-sectional view of an angle grinder;

FIG. 3 is a schematic view of the internal structure of an angle grinder;

FIG. 4 is another internal schematic view of an angle grinder;

FIG. 5 is a schematic view of a housing in an angle grinder;

FIG. 6 is a view in the direction A-A of FIG. 5;

FIG. 7 is a schematic view of the internal structure of a housing in the angle grinder;

FIG. 8 is a schematic view of still another internal structure of an angle grinder;

FIG. 9 is an enlarged view of a portion of FIG. 8 at A;

Fig. 10 is another schematic view of an angle grinder.

In the figure:

100. The device comprises an angle grinder, a shell, 11, a head, 12, a connecting part, 121, a motor shell part, 122, a handle part, 1221, an anti-skid structure, 13, a battery pack combining part, 131, an air inlet rib position, 132, a positioning rib, 133, a speed regulation disc position label, 2, an output shaft, 21, a working accessory, 3, a motor, 4, a transmission assembly, 5, a control switch, 51, a pull rod, 52, a reset spring, 6, a control box, 61, a circuit board, 62, a convex fin, 7 and a battery pack.

Detailed Description

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 following drawings.

In the present disclosure, the terms "comprises," "comprising," "has," "having," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the present application, the term "and/or" is an association relationship describing an association object, meaning that three relationships may exist. For example, A and/or B may mean that A alone, both A and B, and B alone are present. In the present application, the character "/" generally indicates that the front and rear related objects are in an "and/or" relationship.

In the present application, the terms "connected," "coupled," and "mounted" may be directly connected, coupled, or mounted, or indirectly connected, coupled, or mounted. By way of example, two parts or components are connected together without intermediate members, and by indirect connection is meant that the two parts or components are respectively connected to at least one intermediate member, through which the two parts or components are connected. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings, and may include electrical connections or couplings.

In the present application, one of ordinary skill in the art will understand that relative terms (e.g., "about," "approximately," "substantially," etc.) used in connection with quantities or conditions are intended to encompass the values and have the meanings indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a particular value, the tolerance associated with a particular value resulting from manufacture, assembly, use, 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 the addition or subtraction of a percentage (e.g., 1%,5%,10% or more) of the indicated value. Numerical values, not employing relative terms, should also be construed as having specific values of tolerance. Further, "substantially" when referring to relative angular positional relationships (e.g., substantially parallel, substantially perpendicular) may refer to adding or subtracting a degree (e.g., 1 degree, 5 degrees, 10 degrees, or more) from the indicated angle.

In the present application, those of ordinary skill in the art will appreciate that the functions performed by a component may be performed by a component, a plurality of components, a part, or a plurality of parts. Also, the functions performed by the elements may be performed by one element, by an assembly, or by a combination of elements.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", and the like are described in terms of orientation and positional relationship shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements. It should also be understood that the terms upper, lower, left, right, front, back, etc. are not only intended to represent positive orientations, but also to be construed as lateral orientations. For example, the lower side may include a right lower side, a left lower side, a right lower side, a front lower side, a rear lower side, and the like.

In the present application, the terms "means," "module," or "unit" may be implemented in hardware or software for the purpose of realizing a specific function.

In the present application, the terms "computing," "determining," "controlling," "determining," "identifying," and the like refer to the operation and process of a computer system or similar electronic computing device (e.g., controller, processor, etc.).

In daily life, hand-held power tools play a very important role. Hand-held power tools include, but are not limited to, electric hand drills, impact wrenches, impact screwdrivers, angle grinders, and the like. The electric hand drill and the impact drill can be provided with drills with different diameters for drilling holes on an object, the impact wrench is used for screwing bolts and nuts, the impact screwdriver is used for screwing screws off or screwing screws, and the like, and the angle grinder can grind and cut the object. The handheld power tool can improve working efficiency and reduce labor intensity.

Angle grinders generally include direct current angle grinders that use direct current and alternating current angle grinders that use alternating current. In the working process of the direct current angle grinder, no electric wire is required to be connected, so that the direct current angle grinder can be well suitable for various occasions. As shown in fig. 1-2, the angle grinder 100 includes a housing 1, an output shaft 2, a motor 3, and a transmission assembly 4.

The output shaft 2 is arranged to rotate relative to the housing 1, the motor 3 is arranged to drive the output shaft 2 to rotate, and the transmission assembly 4 effects a power transfer 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 carries the working attachment 21 located thereon to perform different works. In some embodiments, different materials can be cut by replacing different types of cutting wheel pieces, and in use, the cutting wheel pieces can be adjusted according to the use requirements of the site.

As shown in fig. 1, the housing 1 includes a head 11, a battery pack coupling portion 13, and a connection portion 12, which are sequentially connected. Wherein the head 11 is arranged to mount the output shaft 2. The battery pack coupling portion 13 is provided to detachably couple the battery pack 7. When the multi-block rechargeable battery pack 7 is used, a user can carry the multi-block rechargeable battery pack 7, and after the electric quantity of the battery pack 7 is used, the battery pack can be detached and replaced, so that the construction efficiency is guaranteed.

The dc angle grinder vibrates greatly during operation, so that a user needs to hold the dc angle grinder tightly. Since the motor 3 of the direct current angle grinder is provided in the handle, the diameter of the handle is large, resulting in poor comfort for the user to hold.

In order to solve the above problems, the present application provides an angle grinder 100, as shown in fig. 1 to 10. The connection part 12 of the housing 1 connects the head part 11 and the battery pack coupling part 13 in the lateral direction, and the connection part 12 includes a motor housing part 121 and a handle part 122. The motor housing portion 121 is configured to house at least a portion of the motor 3, the motor 3 being disposed at least partially within the motor housing portion 121 in a lateral direction, and the handle portion 122 being configured to be gripped by a user. In the lateral direction, the handle portion 122 is disposed between the motor housing portion 121 and the battery pack coupling portion 13, and a difference in circumference of the motor housing portion 121 and that of the handle portion 122 is greater than or equal to 62mm. The lateral direction refers to the extending direction of the housing 1.

Through the design of connecting portion 12 as the motor casing portion 121 that the diameter is great and the handle portion 122 that the diameter is less, when being convenient for motor 3 arrange, reduced the diameter of handle portion 122 to the user's convenience of customers grips, promotes the travelling comfort of use.

In some embodiments, the grip portion 122 has a circumference of less than or equal to 138mm. The design is based on the circumference of the adult hand. By defining the perimeter of the handle portion 122, the angle grinder 100 is manufactured to be ergonomically designed. Likewise, the perimeter of the motor housing portion 121 is less than or equal to 200mm, and the perimeter of the motor housing portion 121 may be 199mm, 198mm, 197mm.

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

In some embodiments, the ratio of the perimeter of the handle portion 122 to the perimeter 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 may be 0.68, 0.67, 0.66, 0.65. Since the motor housing part 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. Accordingly, the type and size of the motor 3 are determined according to the working environment of the angle grinder 100, and then the diameter of the motor housing portion 121 is determined according to the motor 3. By limiting the ratio between the perimeter of the handle portion 122 and the perimeter of the motor housing portion 121, it is possible to ensure both the mounting of the motor 3 and the rational design of the handle portion 122 and the motor housing portion 121.

In some embodiments, the ratio of the diameter of the motor 3 to the circumference of the handle portion 122 is greater than or equal to 0.35. The ratio of the diameter of the motor 3 to the circumference of the handle portion 122 may 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 ensured on the premise that the handle 122 is convenient to hold, so that the output power of the motor 3 can meet the requirement of field use.

In some embodiments, the ratio of the height of the motor 3 to the circumference of the handle portion 122 is greater than or equal to 0.21. The ratio of the height of the motor 3 to the circumference of the handle portion 122 may 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 space length occupied by the motor 3 is limited, and the problem that the whole length of the angle grinder 100 is too long to be used conveniently due to too long space length occupied by the motor 3 is avoided.

As shown in fig. 2, in some embodiments, the length L1 of the housing 1 in the transverse direction is less than or equal to 298mm. The length L1 of the housing 1 in the lateral direction may be 297mm, 296mm, 295mm. By defining the length L1 of the housing 1 in the lateral direction, the volume and weight of the angle grinder 100 can be further reduced, and the holding is facilitated, thereby improving the competitiveness of the market. It is noted that the length L1 of the housing 1 in the lateral direction does not include the size of the battery pack 7.

As shown in fig. 8, in some embodiments, an anti-slip structure 1221 is provided on a surface of the handle portion 122. The anti-slip structure 1221 may be cleats, and/or anti-slip grooves. By providing the anti-slip structure 1221, the friction coefficient of the handle portion 122 can be increased, so that the friction force between the human hand and the handle portion 122 can be increased when in use.

As shown in fig. 4, in some embodiments, the battery pack 7 is disposed at an acute angle or a right angle to the connection portion 12. For example, the battery pack 7 is obliquely inserted 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 arrangement, the whole length of the angle grinder 100 can be ensured to be shortest, and meanwhile, a certain movable space of the hand of a user during holding can be ensured.

As shown in fig. 2-3, in some embodiments, the angle grinder 100 further includes a control switch 5, the control switch 5 being located at the motor housing portion 121, the control switch 5 having a body length L4 of 20mm or less. The body length L4 of the control switch 5 may be 20mm, 19mm, 18mm. The on-stroke of the control switch 5 is 3mm or less. The control switch 5 is triggered by the pull rod 51, the pull rod 51 is positioned in the motor shell 121, the return spring 52 is positioned at the rear side of the movement area of the pull rod 51, the situation that the return spring 52 occupies the installation position of the motor 3 is avoided, and the control is convenient, and meanwhile the compactness of the whole machine is guaranteed.

In some embodiments, the angle grinder 100 further includes a control switch 5, the control switch 5 being disposed within the motor housing portion 121 or within the motor housing portion 121 at the junction of the motor housing portion 121 and the handle portion 122. Through setting up control switch 5, the user of being convenient for controls, when using, through control switch 5 control motor 3 rotation, after the use directly through control switch 5 close can. Moreover, by integrating the control switch 5 in the motor housing portion 121 or in the interior of the junction of the motor housing portion 121 and the handle portion 122, erroneous touching during operation caused by leakage of the control switch 5 is avoided, and the operation is facilitated, and the circumference of the motor housing portion 121 is not increased by the control switch.

As shown in fig. 10, in some embodiments, the angle grinder 100 further includes a control switch 5, the control switch 5 being disposed in the handle portion 122. Through the arrangement, the control switch 5 is arranged in the handle part 122, so that the occupation of the space of the motor housing part 121 can be reduced, the length L3 of the motor housing part 121 along the transverse direction is shortened, and the aim of further shortening the length of the whole machine is fulfilled.

In some embodiments, the control switch 5 adopts a signal switch, and the main body of the signal switch is overlapped with most of the rear bearing of the motor 3, so that the occupied space of the control switch 5 can be further reduced, and the compactness of the angle grinder 100 is ensured. The on-stroke of the signal switch is less than or equal to 2.5mm, so that the control switch 5 can not be started or shut down accidentally due to vibration in operation.

As shown in fig. 1-2, in some embodiments, the angle grinder 100 further includes a circuit board 61, the circuit board 61 being disposed at the battery pack coupling portion 13. The circuit board 61 may control the operation and shutdown of the angle grinder 100 and the rotational speed of the output of the angle grinder 100, thereby facilitating the adjustment of the output power of the angle grinder 100 by a user according to the cut object material.

As shown in fig. 2, 3 and 7, in some embodiments, the circuit board 61 is encapsulated in the control box 6, and a plurality of protruding fins 62 are disposed on the left and right sides of the control box 6, the plurality of protruding fins 62 are in one-to-one butt joint with a plurality of air inlet rib positions 131 of the battery pack coupling part 13 to form an air channel, and the air inlet rib positions 131 are aligned with the protruding fins 62. Through the above arrangement, the protruding fins 62 can perform heat exchange with the outside air, so that heat generated by the circuit board 61 is rapidly discharged, and normal operation of the circuit board 61 is ensured.

As shown in fig. 3 and 6, in some embodiments, a separate positioning rib 132 is disposed on a side of the air inlet rib 131 facing the handle portion 122, and the positioning rib 132 is inserted into the protruding fin 62 in a one-to-one correspondence manner, so as to position the control box 6, thereby facilitating installation of the control box 6.

In some embodiments, the maximum output power of the angle grinder 100 is greater than or equal to 700W. The maximum output power of the angle grinder 100 may be 700W, 710W, 720W. By limiting the maximum output power of the angle grinder 100, the output power can meet the use requirements of various occasions while ensuring that the angle grinder 100 is convenient to use.

As shown in fig. 8 and 9, in some embodiments, the speed dial label 133 is press-fitted inside the housing 1, and the speed dial label 133 can be prevented from coming off.

In some embodiments, there is also provided a power tool comprising a housing 1, an output shaft 2, a motor 3 and a transmission assembly 4. Wherein the output shaft 2 is arranged rotatable relative to the housing 1. The motor 3 is arranged to drive the output shaft 2 in rotation, and the transmission assembly 4 effects a 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 carries the working attachment 21 located thereon to perform different works. In some embodiments, different materials can be cut by replacing different types of cutting wheel pieces, and in use, the cutting wheel pieces can be adjusted according to the use requirements of the site.

The housing 1 includes a head 11, a connection portion 12, and a battery pack coupling portion 13, which are sequentially connected. The head 11 is configured to mount the output shaft 2, the battery pack coupling portion 13 is configured to detachably couple the battery pack 7, and the connection portion 12 connects the head 11 and the battery pack coupling portion 13 in the lateral direction. The battery pack combining part 13 is arranged to be combined with the battery pack 7 in a detachable mode, when the battery pack combining part is used, a user can carry a plurality of rechargeable battery packs 7, after the electricity quantity of the battery packs 7 is used, the battery packs can be detached and replaced, and the construction efficiency is guaranteed.

The connection portion 12 includes a motor housing portion 121 and a handle portion 122. The motor housing portion 121 is configured to house at least part of the motor 3, the motor 3 being at least partially disposed within the motor housing portion 121 in a lateral direction. The handle portion 122 is provided to be held by a user, and the handle portion 122 is provided between the motor housing portion 121 and the battery pack coupling portion 13 in the lateral direction, the difference between the circumference of the motor housing portion 121 and the circumference of the handle portion 122 being greater than or equal to 62mm. Through the design of connecting portion 12 as the motor casing portion 121 that the diameter is great and the handle portion 122 that the diameter is less, when being convenient for motor 3 arrange, reduced the diameter of handle portion 122 to the user's convenience of customers grips, promotes the travelling comfort of use.

In some embodiments, the overall weight of the angle grinder 100 is less than or equal to 1.31Kg. The overall weight of the angle grinder 100 may be 1.31Kg, 1.30Kg, 1.29Kg. The weight of the angle grinder 100 is reduced by a lightweight design, so that the weight of the angle grinder 100 is reduced, and the use of the angle grinder is facilitated for users.

In one embodiment, as shown in fig. 1-10, 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. Wherein the motor housing part 121 is arranged to accommodate at least part of the motor 3, the motor 3 is arranged at least partially in the motor housing part 121 in the lateral direction, and the handle part 122 is arranged to be held by a user. In the lateral direction, the handle portion 122 is provided 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 length L1 of the housing 1 in the lateral direction is greater than or equal to 2W/mm. By accommodating at least part of the motor 3 in the motor housing portion 121 and mounting the battery pack 7 at the battery pack coupling portion 13, the diameter of the handle can be effectively reduced. By defining the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122, the user can hold the angle grinder 100 conveniently while ensuring the output power, and the comfort of use is improved, thereby ensuring the working efficiency.

In some embodiments, the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122 is greater than or equal to 5.2W/mm. The ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122 may be 5.2W/mm, 5.3W/mm, 5.4W/mm.. The ratio of the maximum output power of the angle grinder 100 to the perimeter of the handle 122 reflects the power output efficiency of the motor 3, so that the handle 122 is convenient to hold, and the output power of the angle grinder 100 is enough to meet the construction requirement.

In some embodiments, the ratio of the maximum output power of the angle grinder 100 to the perimeter of the motor housing portion 121 is greater than or equal to 3.2W/mm. The ratio of the maximum output power of the angle grinder 100 to the perimeter of the motor housing portion 121 may be 3.2W/m, 3.3W/m, 3.4W/m. Since at least part of the motor 3 is located in the motor housing part 121, the circumference of the motor housing part 121 limits the diameter of the motor 3. By limiting the ratio of the maximum output power of the angle grinder 100 to the perimeter of the motor housing portion 121, the perimeter of the motor housing portion 121 is limited while the output power of the motor 3 is ensured, and the angle grinder 100 is compact in appearance and convenient to carry.

In some embodiments, as shown in fig. 5, the ratio of the maximum output power of the angle grinder 100 to the length L1 of the housing 1 in the lateral direction is greater than or equal to 2.3W/mm. The ratio of the maximum output power of the angle grinder 100 to the length L1 of the housing 1 in the lateral direction may be 2.3W/mm, 2.4W/mm, 2.5W/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 transverse direction, the housing 1 is prevented from being too long while the output power of the angle grinder 100 is ensured, so that the angle grinder 100 is small in size and convenient to carry.

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. By the above definition, the maximum output power of the angle grinder 100 is ensured while the volume of the motor 3 is ensured to be small, thereby improving the compactness of the structure of the angle grinder 100.

As shown in fig. 5, in some embodiments, the ratio of the length L2 of the handle portion 122 in the transverse direction to the length L1 of the housing 1 in the transverse direction is greater than or equal to 0.26. The ratio of the length L2 of the handle portion 122 in the transverse direction to the length L1 of the housing 1 in the transverse direction may be 0.26, 0.27, 0.28. Since the handle portion 122 is where the user operates the angle grinder 100 to grip, it must be ensured that the length L2 of the handle portion 122 in the lateral direction can accommodate four fingers other than the thumb. Of course, the length L2 of the handle portion 122 in the transverse direction is not required to be too long, and only needs to be convenient for most users.

As shown in fig. 3, in some embodiments, the included angle β formed by the intersection of the extension plane of the circuit board 61 and the lateral tilt is greater than or equal to 45 degrees and less than or equal to 75 degrees. Since the circuit board 61 is mounted at the battery pack coupling portion 13, the mounting of the circuit board 61 is facilitated by defining the angle formed by the intersection of the extension plane of the circuit board 61 and the lateral inclination, and the circuit board 61 is prevented from occupying a large space to cause the size of the housing 1 to become large.

As shown in fig. 5, in some embodiments, the ratio of the length L3 of the motor housing portion 121 in the transverse direction to the length L2 of the handle portion 122 in the transverse 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 in the lateral direction may be 0.6, 0.61, 0.62, 0.63. Since the motor housing part 121 and the handle part 122 together constitute the connecting part 12. The motor housing portion 121 is for mounting the motor 3, and the handle portion 122 is for holding by a user. Therefore, by reasonably distributing the length L3 of the motor housing portion 121 and the length L2 of the handle portion 122 in the transverse direction, the motor 3 can be conveniently mounted and simultaneously can be conveniently held by a user.

There is also provided in some embodiments an angle grinder 100 comprising a housing 1, an output shaft 2, a motor 3 and a drive assembly 4. Wherein the output shaft 2 is arranged rotatable relative to the housing 1. The motor 3 is arranged to drive the output shaft 2 in rotation, and the transmission assembly 4 effects a 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 carries the working attachment 21 located thereon to perform different works. In some embodiments, different materials can be cut by replacing different types of cutting wheel pieces, and in use, the cutting wheel pieces can be adjusted according to the use requirements of the site.

As shown in fig. 1, the housing 1 includes a head 11, a connection portion 12, and a battery pack coupling portion 13, which are sequentially connected. The head 11 is configured to mount the output shaft 2, the battery pack coupling portion 13 is configured to detachably couple the battery pack 7, and the connection portion 12 connects the head 11 and the battery pack coupling portion 13 in the lateral direction. The battery pack combining part 13 is arranged to be combined with the battery pack 7 in a detachable mode, when the battery pack combining part is used, a user can carry a plurality of rechargeable battery packs 7, after the electricity quantity of the battery packs 7 is used, the battery packs can be detached and replaced, and the construction efficiency is guaranteed.

As shown in fig. 1 and 5, the connection portion 12 includes a motor housing portion 121 and a handle portion 122. The motor housing portion 121 is configured to house at least part of the motor 3, the motor 3 being at least partially disposed within the motor housing portion 121 in a lateral direction. The handle portion 122 is provided to be held by a user, and the handle portion 122 is provided between the motor housing portion 121 and the battery pack coupling portion 13 in the lateral direction, the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122 being greater than or equal to 5W/mm. Through the design of connecting portion 12 as the motor casing portion 121 that the diameter is great and the handle portion 122 that the diameter is less, when being convenient for motor 3 arrange, reduced the diameter of handle portion 122 to the user's convenience of customers grips, promotes the travelling comfort of use. By defining the ratio of the maximum output power of the angle grinder 100 to the circumference of the handle portion 122, the output power of the angle grinder 100 can meet the use requirements of a user while ensuring convenient use by the user.

The foregoing has shown and described the basic principles, principal features and advantages of the application. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the application in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the application.

Claims

1. An angle grinder, comprising:

a housing (1);

An output shaft (2) provided rotatably with respect to the housing (1);

a motor (3) arranged to drive the output shaft (2) to rotate;

a transmission assembly (4) for transmitting power between the motor (3) and the output shaft (2);

Characterized in that the housing (1) comprises:

-a head (11) arranged to mount the output shaft (2);

A battery pack coupling part (13) configured to detachably couple the battery packs (7);

A connecting portion (12) that connects the head portion (11) and the battery pack coupling portion (13) in the lateral direction;

the connection part (12) includes:

-a motor housing portion (121) arranged to house at least part of the motor (3), the motor (3) being arranged at least partially within the motor housing portion (121) in the lateral direction;

A handle portion (122) configured to be held by a user;

In the lateral direction, the handle portion (122) is provided between the motor housing portion (121) and the battery pack coupling portion (13), and a difference between a circumference of the motor housing portion (121) and a circumference of the handle portion (122) is 62mm or more.

2. The angle grinder (100) of claim 1, wherein the grip portion (122) has a circumference of less than or equal to 138mm.

3. The angle grinder (100) of claim 1, wherein the grip portion (122) has a circumference of less than or equal to 135mm.

4. The angle grinder (100) of claim 1, wherein a perimeter ratio of the handle portion (122) to the perimeter of the motor housing portion (121) is less than or equal to 0.68.

5. The angle grinder (100) according to claim 1, wherein the length of the housing (1) in the transverse direction is less than or equal to 298mm.

6. The angle grinder according to claim 1, further comprising a control switch (5), the control switch (5) being arranged within the motor housing part (121) or inside the motor housing part (121) at the junction of the motor housing part (121) and the handle part (122).

7. The angle grinder according to claim 1, further comprising a control switch (5), the control switch (5) being arranged in the handle portion (122).

8. The angle grinder of claim 1, further comprising a circuit board (61), the circuit board (61) being disposed at the battery pack coupling 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. A power tool, comprising: