Angle grinder

Abstract

The utility model provides an angle grinder which comprises a shell, the shell comprises a first shell part and a second shell part, the first shell part is provided with a first axis, the second shell part is provided with a second axis, and an angle is formed between the first axis and the second axis; a motor is installed in the second shell part, the motor is provided with a driving shaft, the angle grinder further comprises a tool shaft, and the tool shaft is used for installing a machining tool; the driving shaft is in transmission connection with the tool shaft through a transmission device, the axis of the driving shaft is parallel to the axis of the tool shaft, and the driving shaft is closer to the first shell part relative to the tool shaft. According to the angle grinder, the cutting depth of the machining tool can be increased.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an angle grinder. Background Technology

[0002] In some existing angle grinders, the motor is housed within the handle housing, and the grinding tool is driven by a bevel gear set or similar transmission mechanism. These grinders have a complex structure and generate significant noise during operation. Other angle grinders use a motor to directly drive the grinding tool, but these grinders have limited cutting depths and cannot meet users' cutting needs. Utility Model Content

[0003] The purpose of this invention is to provide an angle grinder that can increase the cutting depth of the machining tool.

[0004] To achieve the above objectives, this utility model provides an angle grinder, including a housing. The housing includes a first housing portion and a second housing portion. The first housing portion has a first axis, and the second housing portion has a second axis. The first axis and the second axis are set at an angle. A motor is installed inside the second housing portion, and the motor has a drive shaft. The angle grinder also includes a tool shaft, which is installed in the second housing portion and is used to mount a processing tool. The drive shaft and the tool shaft are connected by a transmission device. The axis of the drive shaft is parallel to the axis of the tool shaft, and the drive shaft is closer to the first housing portion relative to the tool shaft.

[0005] As a further improvement of one embodiment of the present invention, the first axis is perpendicular to the second axis, and the axis of the drive shaft is collinear with the second axis.

[0006] As a further improvement of one embodiment of the present invention, the first axis is perpendicular to the second axis, and the axis of the drive shaft is parallel to the second axis.

[0007] As a further improvement of one embodiment of the present invention, the second axis is closer to the first housing portion relative to the axis of the tool shaft.

[0008] As a further improvement of one embodiment of this utility model, the cutting depth of the machining tool is greater than or equal to 15mm.

[0009] As a further improvement of one embodiment of the present invention, a protective cover is also included, which is installed on the second housing portion. The axis of the protective cover is collinear with the second axis. The machining tool portion is placed inside the protective cover. The radius of the cutting portion of the protective cover is 12.5 to 25 mm. The distance between the axis of the drive shaft and the axis of the tool shaft is 7 to 30 mm.

[0010] As a further improvement of one embodiment of the present invention, the transmission device is configured as a speed reduction device, and the transmission ratio of the transmission device is greater than or equal to 1:3.

[0011] As a further improvement of one embodiment of the present invention, the transmission ratio of the transmission device is 1.

[0012] As a further improvement of one embodiment of the present invention, the transmission device includes a first gear connected to the drive shaft and a second gear connected to the tool shaft, wherein the first gear meshes with the second gear.

[0013] As a further improvement of one embodiment of the present invention, the transmission device includes a first pulley connected to the drive shaft, a second pulley connected to the tool shaft, and a transmission belt connecting the first pulley and the second pulley.

[0014] Compared with the prior art, the technical solution provided by this utility model directly houses the motor in the second housing, reducing the complexity of the required transmission device. The motor's drive shaft is parallel to the tool shaft and not collinear. Furthermore, the drive shaft is closer to the first housing than the tool shaft, allowing the installation position of the machining tool to be moved forward, thereby increasing the cutting depth of the machining tool and meeting the user's cutting needs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an angle grinder according to one embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A 3D diagram showing the angle grinder with some parts hidden.

[0017] Figure 3 yes Figure 1 The image shows a top view of an angle grinder.

[0018] Figure 4 yes Figure 3 The diagram shows a cross-section of the angle grinder along BB.

[0019] Figure 5 yes Figure 1 A top view of the guard and machining tools of a medium angle grinder.

[0020] Figure label:

[0021] Housing 1; First housing part 11; First axis X1; Second housing part 12; Second axis X2; Imaginary line A; Motor 2; Drive shaft 21; Transmission device 3; Tool shaft 31; Tool shaft axis X3; Protective cover 4; Connecting part 41; Cutting part 411; Main body part 42; Machining tool 5; Battery 6; Radius R1 of the cutting part; Radius R2 of the machining tool. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0023] This invention provides an angle grinder. In this embodiment, the angle grinder can be a handheld, wireless, electric angle grinder.

[0024] See Figures 1 to 4 In one embodiment, the angle grinder includes a housing 1. The housing 1 includes a first housing portion 11 and a second housing portion 12. The first housing portion 11 has a first axis X1. The second housing portion 12 has a second axis X2. The first axis X1 and the second axis X2 are angled together.

[0025] In this embodiment, when the user uses the angle grinder, the first housing portion 11 can be held by the user. Both the first housing portion 11 and the second housing portion 12 can be approximately cylindrical, or parts of the first housing portion 11 and the second housing portion 12 can be approximately cylindrical, forming a central axis.

[0026] It is understood that the first housing portion 11 and the second housing portion 12 are not regular cylindrical shapes. The first axis X1 may be parallel to the extension direction of the first housing portion 11, and the second axis X2 may be parallel to the extension direction of the second housing portion 12.

[0027] The first shell portion 11 and the second shell portion 12 are two parts of the shell 1. The first shell portion 11 and the second shell portion 12 can be integrally formed. When the first shell portion 11 and the second shell portion 12 are integrally formed, the shell 1 can be divided into the first shell portion 11 and the second shell portion 12 by an imaginary line A. The imaginary line A is parallel to the second axis X2, and the portions of the shell 1 located on both sides of the imaginary line A extend in different directions, forming the first shell portion 11 and the second shell portion 12 respectively.

[0028] Of course, the first housing part 11 and the second housing part 12 can also be manufactured separately.

[0029] In one embodiment of this utility model, the first housing portion 11 is composed of two half-shells, and the second housing portion 12 is also composed of two half-shells. The interface between the two half-shells constituting the first housing portion 11 may be perpendicular to the interface between the two half-shells constituting the second housing portion 12.

[0030] The motor 2 can be installed inside the second housing portion 12. The angle grinder may also include a battery 6, which can be detachably installed at the end of the first housing portion 11 and can supply power to the motor 2.

[0031] The motor 2 has a drive shaft 21, and the angle grinder also includes a tool shaft 31. The tool shaft 31 is mounted on the second housing portion 12 and is used to mount a machining tool 5. The machining tool 5 is a grinding disc.

[0032] In this embodiment, the tool shaft 31 is mounted on the second housing portion 12. One end of the tool shaft 31 can be placed inside the second housing portion 12, and the other end can extend out of the second housing portion 12 and connect to the machining tool 5. The machining tool 5 is detachably connected to the tool shaft 31. During use, the user can select a suitable model of machining tool 5 according to their needs and install it on the tool shaft 31.

[0033] The drive shaft 21 and the tool shaft 31 are connected by a transmission device 3. When the motor 2 rotates, the drive shaft 21 drives the tool shaft 31 to rotate through the transmission device 3, which in turn drives the machining tool 5 to rotate.

[0034] In this embodiment, the axis of the drive shaft 21 is parallel to the axis X3 of the tool shaft 31, and the drive shaft 21 is closer to the first housing portion 11 relative to the tool shaft 31.

[0035] The drive shaft 21 is parallel to the tool shaft 31 (X3), which reduces the complexity of the transmission device 3 and the space it occupies. The transmission device 3 also allows for more flexible design of the machining tool 5's rotational speed.

[0036] Furthermore, the arrangement of the transmission device 3 ensures that the tool shaft 31 and the drive shaft 21 are not collinear, allowing for more flexible positioning of the tool shaft 31. The tool shaft 31 is further away from the first housing portion 11 relative to the drive shaft 21, enabling the machining tool 5 to move forward relative to the first housing portion 11. This reduces the influence of the diameter of the second housing portion 12 on the cutting depth, thereby increasing the cutting depth of the angle grinder and meeting the user's cutting requirements.

[0037] Furthermore, in one embodiment of this utility model, the first axis X1 is perpendicular to the second axis X2.

[0038] In this embodiment, the first housing portion 11 and the second housing portion 12 are arranged approximately perpendicularly, which is more ergonomic and convenient for users.

[0039] In one embodiment, the axis of the drive shaft 21 is collinear with the second axis X2. This arrangement facilitates the installation and positioning of the motor 2.

[0040] In another embodiment of this utility model, the axis of the drive shaft 21 is parallel to the second axis X2. This arrangement facilitates the installation of the transmission device 3 between the drive shaft 21 and the tool shaft 31, and also allows for more flexible positioning of the tool shaft 31.

[0041] In this embodiment, the second axis X2 is closer to the first housing portion 11 relative to the tool axis 31.

[0042] In this embodiment, the axis X3 of the tool spindle 31 is arranged parallel to the second axis X2. The axis X3 of the tool spindle 31 is further away from the first housing portion 11 relative to the second axis X2, so that the position of the machining tool 5 connected to the tool spindle 31 is further away from the first housing portion 11, thereby increasing the cutting depth of the machining tool 5 and meeting the user's cutting needs.

[0043] In one embodiment of this utility model, the cutting depth of the machining tool 5 is greater than or equal to 15mm.

[0044] For a specific example, when using a machining tool 5 with a diameter of 76mm, if the tool shaft 31 and the drive shaft 21 are set collinearly, the cutting depth is approximately 13mm. However, in this embodiment, the cutting depth of the machining tool 5 is 15mm.

[0045] The implementation method provided in this application can effectively increase the cutting depth of the machining tool 5 and meet the user's machining needs.

[0046] Further integration Figures 1 to 5 In one embodiment, the angle grinder further includes a cover 4 mounted on the second housing portion 12, the axis of the cover 4 being collinear with the second axis X2. The machining tool 5 is partially housed within the cover 4. The radius R1 of the cutting portion 411 of the cover 4 is 12.5–25 mm. The distance between the axis of the drive shaft 21 and the axis of the tool shaft 31 is 7–30 mm.

[0047] In this embodiment, the radius R2 of the machining tool 5 can be greater than 25 mm. Preferably, the radius R2 of the machining tool 5 is 25 to 40 mm.

[0048] In a specific embodiment, the protective cover 4 includes a connecting portion 41 connected to the second housing portion 21 and a main body portion 42. The connecting portion 41 is connected to the second housing portion 12. The connecting portion 41 includes a cutting portion 411. The main body portion 42 is configured as a semi-open cover, and the main body portion 42 surrounds a portion of the machining tool 5 circumferentially. A portion of the connecting portion 41 is located in the area not surrounded by the main body portion 42, and this portion forms the cutting portion 411.

[0049] The cutting portion 411 has an arc-shaped outer edge. The cutting portion 411 is coaxial with the machining tool 5, and the radius R1 of the cutting portion 411 is smaller than the radius R2 of the machining tool 5. The cutting portion 411 does not completely obstruct the machining tool 5, thereby allowing the machining tool 5 to perform cutting.

[0050] As the tool shaft 31 moves forward relative to the drive shaft 21, the protective cover 4 also moves forward relative to the drive shaft 21, allowing the cutting portion 411 to protrude relative to the front end of the second housing portion 12. Along the first axis X1, the end closest to the second housing portion 12 is considered the front, and the end where the battery 6 is located is considered the rear. Therefore, the cutting depth of the machining tool 5 is the length of the portion of the machining tool 5 protruding relative to the cutting portion 411. That is, the cutting depth of the machining tool 5 is the difference between the radius R2 of the machining tool 5 and the radius R1 of the cutting portion 411.

[0051] In summary, due to the presence of the transmission device 3, the tool shaft 31 is positioned further away from the first housing portion 11 relative to the drive shaft 21, thereby causing the protective cover 4 and the machining tool 5 to move forward, and increasing the cutting depth of the machining tool 5.

[0052] The distance between the axis of the drive shaft 21 and the axis of the tool shaft 31 is 7 to 30 mm. This arrangement facilitates the installation of the transmission device 3, does not increase the diameter of the second housing part 12, and effectively increases the cutting depth of the machining tool 5.

[0053] Furthermore, in one embodiment of this utility model, the transmission device 3 is configured as a speed reduction device, and the transmission ratio of the transmission device 3 is greater than or equal to 1:3.

[0054] In this embodiment, the transmission device 3 is used for speed reduction, which increases the range of motor models that can be selected and makes it easier to design the rotational speed of the tool shaft 31, thereby saving costs to a certain extent and making it easier to process and manufacture.

[0055] In other embodiments provided by this utility model, the transmission ratio of the transmission device 3 is 1.

[0056] It is understood that in this embodiment, the rotational speed of the motor 2 is the same as the rotational speed of the machining tool 5. The transmission device 3 is not used to adjust the rotational speed of the machining tool 5, but only to move the machining tool 5 forward and increase its cutting depth. The overall structure of the transmission device 3 is simple, occupies little space, and has low noise.

[0057] Furthermore, in one embodiment of this utility model, the transmission device 3 includes a first gear connected to the drive shaft 21 and a second gear connected to the tool shaft 31. The first gear meshes with the second gear.

[0058] In this embodiment, the transmission ratio of the transmission device 3 can be adjusted by designing the first and second gears. The transmission device 3 consists of only two meshing gears, and its structure is simple.

[0059] In another embodiment of this utility model, the transmission device 3 is a belt drive. The transmission device 3 includes a first pulley connected to the drive shaft 21, a second pulley connected to the tool shaft 31, and a transmission belt connecting the first pulley and the second pulley.

[0060] A suitable transmission ratio can be obtained by designing the first and second pulleys. The transmission device 3 only includes a set of pulley transmission structures, and the overall structure is simple.

[0061] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0062] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. An angle grinder, characterized in that, The device includes a housing, comprising a first housing portion and a second housing portion. The first housing portion has a first axis, and the second housing portion has a second axis, which are angularly aligned. A motor is installed within the second housing portion, and the motor has a drive shaft. The angle grinder also includes a tool shaft, which is mounted on the second housing portion and is used to mount a machining tool. The drive shaft and the tool shaft are connected via a transmission device, and the axis of the drive shaft is parallel to the axis of the tool shaft, with the drive shaft being closer to the first housing portion relative to the tool shaft.

2. The angle grinder according to claim 1, characterized in that, The first axis is perpendicular to the second axis, and the axis of the drive shaft is collinear with the second axis.

3. The angle grinder according to claim 1, characterized in that, The first axis is perpendicular to the second axis, and the axis of the drive shaft is parallel to the second axis.

4. The angle grinder according to claim 3, characterized in that, The second axis is closer to the first housing portion relative to the axis of the tool axis.

5. The angle grinder according to any one of claims 1 to 4, characterized in that, The cutting depth of the machining tool is greater than or equal to 15 mm.

6. The angle grinder according to claim 5, characterized in that, It also includes a protective cover installed on the second housing portion, the axis of the protective cover being collinear with the second axis, the machining tool portion being placed inside the protective cover, the radius of the cuttable portion of the protective cover being 12.5 to 25 mm, and the distance between the axis of the drive shaft and the axis of the tool shaft being 7 to 30 mm.

7. The angle grinder according to claim 1, characterized in that, The transmission device is configured as a speed reduction device, and the transmission ratio of the transmission device is greater than or equal to 1:

3.

8. The angle grinder according to claim 1, characterized in that, The transmission ratio of the transmission device is 1.

9. The angle grinder according to claim 7 or 8, characterized in that, The transmission device includes a first gear connected to the drive shaft and a second gear connected to the tool shaft, wherein the first gear meshes with the second gear.

10. The angle grinder according to claim 7 or 8, characterized in that, The transmission device includes a first pulley connected to the drive shaft, a second pulley connected to the tool shaft, and a transmission belt connecting the first pulley and the second pulley.

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