An angle grinder

Abstract

The application discloses an angle grinder, which belongs to the technical field of handheld tools and comprises a shell, a working assembly and a motor. The shell extends along a first axis to form a gripping part. The working assembly is arranged at the first end of the shell and comprises a driven shaft extending along a second axis and a working head connected with the driven shaft. The second axis is perpendicular to the first axis. The motor is arranged at the first end of the shell and is located obliquely above the working assembly. The motor comprises a motor shaft. The first axis, the second axis and the motor shaft are coplanar. The motor shaft can drive the driven shaft to rotate. The included angle between the motor shaft and the first axis is an acute angle. The layout between the motor and the working assembly makes full use of space, reduces the volume of the whole machine, makes the layout of the whole machine more compact and guarantees the balance and stability of the working head during the working process.

Description

Technical Field

[0001] The present invention relates to the technical field of handheld tools, in particular to an angle grinder. Background Art

[0002] In the prior art, handheld angle grinders have been widely used in various industries. Angle grinders typically use a motor to drive the working head for rotational motion, and the motor can adjust the speed of the working head. In existing angle grinders, the motor shaft is typically perpendicular to the rotating axis of the working head, which takes up a large amount of space, making the angle grinder bulky and inconvenient to hold and carry. Although some angle grinders have the motor shaft arranged parallel to the rotating axis of the working head, the motor size is not fully considered during the layout, and the problem of the overall machine being bulky still exists. Summary of the Invention

[0003] The purpose of the present invention is to provide an angle grinder to solve the technical problem in the prior art that the unreasonable layout of the motor and the working head leads to a large volume of the entire machine.

[0004] As conceived above, the technical solution adopted by the present invention is:

[0005] An angle grinder, comprising:

[0006] a housing, the housing including a grip portion penetrated by a first axis;

[0007] a working assembly disposed at the first end of the housing, the working assembly comprising a driven shaft extending along a second axis and a working head connected to the driven shaft, the working head being used to support a working attachment, the second axis being perpendicular to the first axis;

[0008] The motor is arranged at the first end of the shell, and the motor is located obliquely above the working component. The motor includes a motor shaft, and the first axis and the second axis are coplanar. The motor shaft can drive the driven shaft to rotate, and the angle between the projection of the motor shaft on the plane where the first axis and the second axis are located and the first axis is an acute angle.

[0009] The motor shaft has a driving end and a transmission end, the transmission end is connected to the driven shaft via a transmission mechanism, and the vertical distance between the transmission end and the second axis is smaller than the vertical distance between the driving end and the second axis.

[0010] Wherein, the driving end is located obliquely above the transmission end and close to the housing.

[0011] The transmission mechanism includes a driving gear provided on the motor shaft and a driven gear provided on the driven shaft, the driving gear is meshed with the driven gear, and the upper surface of the driven gear is parallel to the first axis.

[0012] Wherein, the upper surface of the gripping portion is lower than the driving end, and the lower surface of the gripping portion is higher than the working head.

[0013] The motor includes a stator lamination connected to the motor shaft, and a projection of the stator lamination on the second axis and a projection of the working component on the second axis do not overlap.

[0014] A circuit control module is provided in the housing, and a projection of the stator laminations on the second axis and a projection of the circuit control module on the second axis do not overlap.

[0015] The included angle between the projection of the motor shaft onto the plane where the first axis and the second axis are located and the first axis is 30° to 85°.

[0016] The angle grinder further includes a slot, which is provided at the second end of the shell for plugging in a battery pack, and the plugging and unplugging direction of the battery pack and the slot is perpendicular or parallel to the plane where the first axis and the second axis are located.

[0017] Among them, also include:

[0018] A battery pack is arranged at the second end of the shell, the battery pack can be plugged into the shell, and the upper end of the battery pack is inclined in a direction away from the shell.

[0019] Beneficial effects of the present invention:

[0020] The angle grinder proposed by the present invention utilizes a motor shaft to drive the driven shaft on which the working head is mounted, thereby achieving the working head's operation. The motor is located obliquely above the working assembly, and the angle between the motor shaft and the first axis is acute. This creates an angle between the motor shaft and the driven shaft, fully utilizing space and reducing the overall size of the machine. This makes the overall layout more compact, easier to hold, and ensures the balance and stability of the working head during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the angle grinder provided in the first embodiment of the present invention;

[0022] Figure 2 This is a front view of the angle grinder provided by the first embodiment of the present invention;

[0023] Figure 3 is a side view of the angle grinder provided in the first embodiment of the present invention;

[0024] Figure 4 yes Figure 3 AA-direction cross-sectional view;

[0025] Figure 5 yes Figure 4 Partial structural diagram;

[0026] Figure 6 This is a structural diagram of a first angle grinder provided by the second embodiment of the present invention;

[0027] Figure 7 yes Figure 6 A cross-sectional view of the angle grinder provided;

[0028] Figure 8 This is a schematic structural diagram of a second angle grinder provided by the second embodiment of the present invention;

[0029] Figure 9 yes Figure 8 A cross-sectional view of the angle grinder provided;

[0030] Figure 10 This is a schematic structural diagram of a third angle grinder provided by the second embodiment of the present invention;

[0031] Figure 11 yes Figure 10 A cross-sectional view of the angle grinder provided;

[0032] Figure 12 It is a structural schematic diagram of the fourth angle grinder provided in the second embodiment of the present invention.

[0033] In the picture:

[0034] 1. Housing; 11. Grip; 12. Circuit control module;

[0035] 2. Working assembly; 21. Driven shaft;

[0036] 3. Motor; 31. Motor shaft; 32. Stator laminations; 33. Rotor laminations;

[0037] 4. Battery pack; 41. Elastic rod. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] Example 1

[0043] See also Figures 1 to 5 The embodiment of the present invention provides an angle grinder, but the principle of this embodiment can be applied to and is not limited to the following: tools that require power connection, such as screwdrivers, electric drills, wrenches, and jigsaws.

[0044] The angle grinder comprises a housing 1, a working assembly 2, a motor 3, and a battery pack 4. The housing 1 forms a gripping portion 11 with a first axis extending through the gripping portion 11, which facilitates gripping. The working assembly 2 and motor 3 are both located at the first end of the housing 1, while the battery pack 4 is located at the second end of the housing 1. The motor 3 is located diagonally above the working assembly 2. The working assembly 2 includes a driven shaft 21 extending along the second axis and a working head connected to the driven shaft 21. The working head is used to support work accessories, such as grinding discs, so that the rotation of the driven shaft 21 drives the grinding discs to cut and grind the workpiece. The second axis is perpendicular to the first axis. The motor 3 includes a motor shaft 31. The first axis and the second axis are coplanar. The motor shaft 31 can drive the driven shaft 21 to rotate to realize the operation of the working head. The angle between the projection of the motor shaft 31 to the plane where the first axis and the second axis are located and the first axis is an acute angle, so that the motor shaft 31 and the driven shaft 21 are set at an angle, which makes full use of the space, reduces the volume of the whole machine, makes the layout of the whole machine more compact, is easy to hold, and can ensure the balance and stability of the working head during operation.

[0045] The motor shaft 31 can be coplanar with the first and second axes. In this case, the motor 3 is positioned directly in front of the grip 11, and the motor shaft 31 is tilted relative to the first axis, such that the angle between the motor shaft 31 and the first axis is acute. In another embodiment, the motor shaft 31 is not coplanar with the plane containing the first and second axes, and the motor 3 extends to the side of the grip 11. This can reduce the volume of the motor 3 on one side of the housing 1, thereby allowing for clearance when using an angle grinder.

[0046] The housing 1 houses a circuit control module 12, and the grip 11 is equipped with a switch structure for easy single-handed control. The switch structure is electrically connected to the circuit control module 12, and the switch structure is used to control the start and stop of the motor 3. The working principle will not be elaborated on here.

[0047] The included angle between the projection of the motor shaft 31 onto the plane where the first and second axes are located and the first axis is 30° to 85°, that is, the included angle between the motor shaft 31 and the driven shaft 21 is 15° to 60°, which can not only meet the requirement of reducing the volume but also facilitate the transmission connection between the motor shaft 31 and the driven shaft 21. In this embodiment, the motor 3 is an outer rotor motor. For the sake of clarity, Figure 4 In the figure, I represents the first axis, II represents the second axis, and III represents the axis of the motor shaft 31 .

[0048] The motor shaft 31 has a driving end and a transmission end. The transmission end is connected to the driven shaft 21 via a transmission mechanism. The vertical distance between the transmission end and the second axis is smaller than the vertical distance between the driving end and the second axis. In other words, in the layout, the driving end of the motor shaft 31 is close to the driven shaft 21, while the driving end extends obliquely away from the driven shaft 21. This minimizes the space occupied by the motor shaft 31 along the second axis, thus reducing the overall size of the machine.

[0049] The driving end is located obliquely above the transmission end and close to the shell 1, that is, the working head is located at the bottom, the transmission end of the motor shaft 31 cooperates with the driven shaft 21, and the driving end of the motor shaft 31 extends obliquely above the driven shaft 21, so that the motor 3 and the working component 2 can be evenly arranged at one end of the shell 1, avoiding excessive shift of the center of gravity and causing instability in the working process.

[0050] In this embodiment, the transmission mechanism includes a driving gear provided on the motor shaft 31 and a driven gear provided on the driven shaft 21, and the driving gear meshes with the driven gear. The upper surface of the driven gear is parallel to the first axis, and the gripping portion 11 can be configured to extend along the first axis. In this case, the extension directions of the driven shaft 21 and the gripping portion 11 are relatively vertical or approximately vertical. Since there is an angle between the motor shaft 31 and the driven shaft 21, the driving gear and the driven gear are both bevel gears, and the bevel angle of the bevel gears is equal to the angle between the motor shaft 31 and the driven shaft 21. Of course, in other embodiments, the transmission mechanism can also be a multi-stage transmission, which is not limited here.

[0051] The upper surface of the grip 11 is lower than the drive end, that is, the highest position of the motor 3 is higher than the grip 11. In order not to interfere with the normal operation of the working head, the working head is generally set at an angle below the housing 1, so that the working head is lower than the lower surface of the grip 11 of the housing 1. Here, the motor 3 located at an angle above the working head is set higher than the grip 11 to ensure balance and avoid excessive shift of the center of gravity causing instability during the working process.

[0052] The motor 3 includes a stator lamination 32 and a rotor lamination 33. The stator lamination 32 is connected to the motor shaft 31. The projection of the stator lamination 32 on the second axis does not overlap with the projection of the working component 2 on the second axis, thereby reducing the size of the entire machine on the first axis, i.e., the length direction.

[0053] Furthermore, in one embodiment, the gripping portion is arranged to extend along the first axis, the stator laminations 32 are arranged around the circumference of the motor shaft, and the upper surface of the gripping portion is lower than the stator laminations 32. Because the stator laminations 32 occupy a certain space in the radial direction, the stator laminations 32 are arranged to be higher than the housing, which can appropriately increase the size of the entire machine in the width direction, that is, the direction of the second axis, so as to reduce the size of the entire machine in the length direction.

[0054] The projection of the stator lamination 32 on the second axis and the projection of the circuit control module 12 on the second axis do not overlap, which is also considered in the size layout, so that the size of the entire machine in the width direction is fully utilized, and the width and length dimensions of the entire machine are fully considered for reasonable layout.

[0055] The battery pack 4 is positioned at the second end of the housing 1, away from the operating assembly 2, to prevent the center of gravity from tilting toward one end and to ensure stability during operation. In this embodiment, the battery pack 4 is plugged into the housing 1, facilitating installation and removal. Once plugged into the housing 1, the battery pack 4 is electrically connected to the circuit control module 12 within the housing 1, facilitating power supply. When the battery pack 4 is depleted, it can be replaced by simply unplugging it.

[0056] In this embodiment, the battery pack 4 is located at the bottom of the housing 1. Specifically, the housing 1 is provided with a slot with a groove therein. An elastic rod 41 is provided on one side of the battery pack 4, with a protrusion at the end of the elastic rod 41. By pressing the elastic rod 41, the elastic rod 41 is inserted into the slot. When the elastic rod 41 is released, the protrusion engages with the groove, and the battery pack 4 abuts against the housing 1, thereby limiting the position of the battery pack 4.

[0057] The first end of the shell 1 is the head, and the second end of the shell 1 is the tail. The shell 1 also has an upper part, a lower part and a side part. The working head and the motor 3 are arranged at the head of the shell 1, and the battery pack 4 is arranged at the tail of the shell 1. In this embodiment, the slot is arranged at the tail of the shell 1, and the battery pack 4 is horizontally inserted below the shell 1 to cooperate with the shell 1.

[0058] Example 2

[0059] Figures 6 to 12 A second embodiment is shown, wherein components identical or corresponding to those in the first embodiment are numbered accordingly. For simplicity, only the differences between the second embodiment and the first embodiment are described. The difference is that the upper end of the battery pack 4 is tilted away from the housing 1, so that the battery pack 4 protrudes as little as possible from the upper surface of the housing 1. This prevents the battery pack 4 from protruding and hitting the arm when the user grasps the grip portion 11, facilitating use. The position of the battery pack 4 varies and is set according to actual needs to ensure that the battery pack does not interfere with the hand's grip, the center of gravity is centered as much as possible, and processing and production are facilitated.

[0060] See also Figure 6 and Figure 7 The slot is set at the rear of the shell 1, and the battery pack 4 is inserted horizontally above the shell 1 to match the shell 1. The insertion and removal direction of the battery pack 4 and the slot is parallel to the plane where the first axis and the second axis are located, thereby leaving more avoidance space for the lower part of the angle grinder. Figure 8 and Figure 9 The slot is provided at the upper portion of the housing 1, and the battery pack 4 is inserted downward at the rear end of the housing 1 to cooperate with the housing 1. At this time, the insertion and removal direction of the battery pack 4 and the slot is also parallel to the plane where the first axis and the second axis are located. Figure 10 and Figure 11 The slot is provided on the side of the housing 1, and the battery pack 4 is inserted into the rear side of the housing 1 to match the housing 1. The insertion and removal direction of the battery pack 4 and the slot is perpendicular to the plane where the first axis and the second axis are located. Figure 12 The slot is arranged at an oblique position above the shell 1 , and the battery pack 4 is obliquely inserted into the tail of the shell 1 to cooperate with the shell 1 .

[0061] The above embodiments merely illustrate the basic principles and features of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An angle grinder, characterized in that: include: A housing (1), the housing (1) comprising a gripping portion (11) penetrated by a first axis; a working assembly (2) disposed at a first end of the housing (1), the working assembly (2) comprising a driven shaft (21) extending along a second axis and a working head connected to the driven shaft (21), the working head being used to support a working attachment, the second axis being perpendicular to the first axis; a motor (3) disposed at a first end of the housing (1), the motor (3) being located obliquely above the working assembly (2), the motor (3) comprising a motor shaft (31), the first axis and the second axis being coplanar, the motor shaft (31) being capable of driving the driven shaft (21) to rotate, and an angle between a projection of the motor shaft (31) onto a plane where the first axis and the second axis are located and the first axis is an acute angle; The motor shaft (31) has a driving end and a transmission end, the transmission end is transmission-connected to the driven shaft (21) via a transmission mechanism, and a vertical distance between the transmission end and the second axis is smaller than a vertical distance between the driving end and the second axis; The transmission mechanism comprises a driving gear provided on the motor shaft (31) and a driven gear provided on the driven shaft (21), the driving gear meshing with the driven gear, and the upper surface of the driven gear is parallel to the first axis; The upper surface of the gripping portion (11) is lower than the driving end, and the lower surface of the gripping portion (11) is higher than the working head.

2. The angle grinder according to claim 1, characterized in that The driving end is located obliquely above the transmission end and close to the housing (1).

3. The angle grinder according to claim 1, characterized in that The motor (3) comprises a stator lamination (32), the stator lamination (32) is connected to the motor shaft (31), and a projection of the stator lamination (32) on the second axis and a projection of the working component (2) on the second axis do not overlap.

4. The angle grinder according to claim 3, characterized in that A circuit control module (12) is provided in the housing (1), and a projection of the stator laminations (32) on the second axis and a projection of the circuit control module (12) on the second axis do not overlap.

5. The angle grinder according to any one of claims 1 to 4, characterized in that: The included angle between the projection of the motor shaft (31) onto the plane where the first axis and the second axis are located and the first axis is 30° to 85°.

6. The angle grinder according to claim 5, characterized in that The angle grinder further comprises a slot, which is arranged at the second end of the housing (1) and is used to plug in a battery pack (4), wherein the plugging and unplugging direction of the battery pack (4) and the slot is perpendicular or parallel to the plane where the first axis and the second axis are located.

7. The angle grinder according to any one of claims 1 to 4, characterized in that: Also includes: A battery pack (4) is arranged at the second end of the shell (1); the battery pack (4) can be plugged into the shell (1); and the upper end of the battery pack (4) is inclined in a direction away from the shell (1).

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