Abrasive belt sander

Abstract

The application discloses a belt sander, comprising: a housing formed with a first accommodating space; a handle connected to the housing; a polishing assembly connected to the housing and used for polishing a workpiece, a plane of the polishing assembly in contact with the workpiece being a working plane; a motor arranged in the first accommodating space and used for providing power for polishing work of the polishing assembly; a power supply assembly providing energy supply for the belt sander; the housing is further formed with a first connecting portion for connecting the power supply assembly, the first connecting portion being located on the upper side of the polishing assembly, and the power supply assembly being at least partially located on the front side or the rear side of the motor. The belt sander is compact, the center of gravity is forward, and the tool is more stable in use.

Description

Technical Field

[0001] This application relates to a power tool, specifically a belt sander. Background Technology

[0002] The power supply unit of existing DC belt sanders is generally installed at the rear of the handle, which shifts the overall center of gravity of the tool to the rear. This leads to instability during operation, resulting in poor user accuracy, inconvenience, and a poor user experience. Furthermore, existing belt sanders are relatively large and lack a compact and portable design. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this application is to provide a belt sander that is highly stable and compact in size.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A belt sander includes: a housing having a first receiving space; a handle connected to the housing; a grinding assembly connected to the housing for grinding a workpiece, wherein the plane of the grinding assembly in contact with the workpiece is a working plane; a motor disposed within the first receiving space for providing power to the grinding assembly; a power supply assembly for providing energy to the belt sander; the housing also forms a first connection portion for connecting the power supply assembly, the first connection portion being located above the grinding assembly, and the power supply assembly being at least partially located in front of or behind the motor.

[0006] In one embodiment, the ratio of the height of the grinding assembly to the overall height of the belt sander when the power supply assembly is installed is greater than or equal to 0.2 and less than or equal to 0.68.

[0007] In one embodiment, the motor is disposed in the first accommodating space along a first straight line, the first straight line being parallel to the working plane, or the angle between the first straight line and the working plane being less than 90°.

[0008] In one embodiment, the power supply assembly is mounted to the first connection portion along a first plane, the first plane being parallel to the working plane, or the angle between the first plane and the working plane being less than or equal to 90°.

[0009] In one embodiment, the motor is disposed in the first receiving space along a first straight line, and the power supply assembly is mounted to the first connecting part along a first plane, wherein the first straight line is parallel to or coincides with the first plane.

[0010] In one embodiment, the motor is disposed in the first receiving space along a first straight line, and the power supply assembly is mounted to the first connecting part along a first plane, wherein the angle between the first straight line and the first plane is less than 90°.

[0011] In one embodiment, the orthographic projection of the first accommodating space onto the working plane is a first projection, the orthographic projection of the first connecting portion onto the working plane is a second projection, and the housing onto the working plane has a third projection; the first projection at least partially overlaps with the third projection, and the second projection at least partially overlaps with the third projection.

[0012] In one embodiment, the area of ​​the overlapping portion of the first projection and the third projection accounts for more than or equal to 70% of the total area of ​​the first projection.

[0013] In one embodiment, the first projection coincides with the third projection, or the first projection is included by the third projection.

[0014] In one embodiment, the area of ​​the overlapping portion of the second projection and the third projection accounts for more than or equal to 70% of the total area of ​​the second projection.

[0015] In one embodiment, the second projection coincides with the third projection, or the second projection is included by the third projection.

[0016] In one embodiment, a circuit board assembly is also included, which is disposed within the housing.

[0017] In one embodiment, the circuit board assembly is at least partially disposed within the first receiving space.

[0018] In one embodiment, the circuit board assembly is at least partially located between the first receiving space and the first connection portion.

[0019] In one embodiment, a dust collection channel is also included, formed in a first receiving space of the housing and extending from the housing along a second straight line, including a dust collection outlet for dust discharge.

[0020] In one embodiment, a secondary handle is also included, which is formed at the front end of the housing.

[0021] In one embodiment, the secondary handle is movably connected to the housing, allowing the secondary handle to move between a retracted state and a used state; when the secondary handle is in the retracted state, the secondary handle at least partially covers the power assembly, motor, or part of the housing.

[0022] This application also provides a belt sander, comprising: a housing having a first receiving space; a handle connected to the housing; a grinding assembly connected to the housing for grinding a workpiece, wherein the plane in contact with the workpiece by the grinding assembly is a working plane; a motor for providing power to the grinding assembly; a power supply assembly for providing energy to the belt sander; the housing also forms a first connection portion for connecting the power supply assembly, the first connection portion being at least partially located on the upper side of the grinding assembly; when the belt sander is placed on the working plane, the maximum distance from the power supply assembly to the working plane is a first height H1, the height from the handle to the working plane 201 is a second height H2, and the absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 5 cm.

[0023] In one embodiment, the absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 3 cm.

[0024] The advantages of this application are: the belt sander is more compact, saving storage space; the center of gravity is forward, and the weight of the power supply unit is used to reduce the force applied by the user's hands, making the tool more stable and providing a better user experience. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of one embodiment of this application;

[0026] Figure 2 yes Figure 1 Top view;

[0027] Figure 3 yes Figure 1 The main view;

[0028] Figure 4 yes Figure 1 Internal structure diagram;

[0029] Figure 5 This is a schematic diagram of the structure of one embodiment of this application;

[0030] Figure 6 This is a schematic diagram of the secondary handle being rotated to a certain position in one embodiment of this application;

[0031] Figure 7 yes Figure 6 A diagram showing the middle auxiliary handle when rotated to another position;

[0032] Figure 8 This is a side view of one embodiment of this application;

[0033] Figure 9 This is a side view of one embodiment of this application;

[0034] Figure 10This is a side view of one embodiment of this application;

[0035] Figure 11 This is a side view of one embodiment of this application. Detailed Implementation

[0036] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0037] For ease of explanation of the technical solution of this application, the following are also defined: Figure 1 The middle arrows indicate up, down, forward, and backward. In this implementation, up, down, left, and right all refer to... Figure 1 Take the state of belt sander 10 in the example.

[0038] like Figures 1 to 4 As shown, this embodiment provides a belt sander 10, which can be used to grind workpieces to make the surface of the workpieces smooth. Figure 1 As shown, the belt sander 100 includes a housing 100, a grinding assembly 200, a power supply assembly 300, and a motor 400.

[0039] The housing 100 has a first receiving space 110 and a first connecting portion 120. The housing 100 is the main body of the belt sander 10, and most of the components of the belt sander 10 are connected to or located inside the housing 100. Here, the receiving space refers to a closed or partially closed space formed by the housing 100 for placing corresponding components, and the receiving space is continuous with the housing 100. The first connecting portion 120 is a structure for connecting other components and is at least partially formed on the surface of the housing. The first connecting portion 120 should be understood in particular to include at least one interface, which is provided with at least one form-fitting and / or force-fitting receiving element and / or unit.

[0040] The power supply assembly 300 is detachably connected to the first connection portion 120. At least one electrical contact element of the belt sander 10 is disposed on the first connection portion 120, and the electrical contact element is configured for electrical connection with a corresponding contact element of the power supply assembly 300. The power supply assembly 300 is preferably constructed as a rechargeable energy storage assembly. Preferably, the power supply assembly 300 includes a plurality of rechargeable, electrically connected rechargeable batteries, allowing the power supply assembly 300 to be repeatedly charged and connected and disconnected from the first connection portion 120 multiple times.

[0041] The grinding assembly 200 is connected to the housing 100 and is used to perform grinding operations on the workpiece. The plane in contact between the grinding assembly 200 and the workpiece is the working plane 201. The working plane 201 is specifically defined as the surface where the grinding assembly contacts the workpiece most frequently in the belt sander 10's most commonly used orientation, or it can also refer to the plane between the belt sander 10 and the non-workpiece in the belt sander 10's conventional placement orientation. Depending on the type of belt sander 10, the grinding assembly 200 can have different structures. The grinding assembly 200 includes a grinding element (not shown) that has surface contact with the workpiece. The grinding element rotates about a second straight line 102, which is parallel to the working plane. In this embodiment, in particular, the grinding element is a belt-like structure with a rough surface and grinding function.

[0042] Furthermore, the ratio of the height of the grinding component 200 to the overall height of the belt sander 10 is greater than or equal to 0.1 and less than or equal to 0.8. The height of the grinding component 200 refers to the vertical distance between the upper and lower surfaces of the grinding component 200, or the vertical distance from the highest point of the grinding component 200 structure to the working plane, denoted as h. The overall height refers to the vertical distance from the highest point of the housing 100 structure to the working plane 201, denoted as the overall height H. The height of the overall height does not include the height occupied by the dust collection channel 140. That is, 0.1 ≤ h / H ≤ 0.8. Even further, the ratio of the height h of the grinding component 200 to the overall height H of the belt sander 10 is greater than or equal to 0.2 and less than or equal to 0.65, that is, 0.2 ≤ h / H ≤ 0.65. In this embodiment, the ratio of the height h of the grinding component 200 to the overall height H of the belt sander 10 is greater than or equal to 0.2 and less than or equal to 0.65, that is, 0.2≤h / H≤0.65.

[0043] The housing 100 also forms a second receiving space 130, which is a partially enclosed space, and the grinding assembly 200 is disposed within the second receiving space 130. The second receiving space 130 is located at the lower part of the housing 100, and the upper part of the grinding assembly 200 is connected to the housing 100. The grinding assembly 200 does not exceed the boundary formed around the housing 100, which should be understood as a region or spatial interface. This region is either a region enclosed by multiple boundary surfaces perpendicular to the working plane 201, or a region enclosed by a continuous boundary surface perpendicular to the working plane 201. Alternatively, the projection of the grinding assembly 200 onto the working plane coincides with the projection of the housing 100 onto the working plane, or the projection of the grinding assembly 200 onto the working plane is included by the projection of the housing 100 onto the working plane.

[0044] A motor 400 is disposed within the first receiving space 110 and is used to provide power for the operation of the grinding assembly 200. The term "motor 400" is a general term for any device that provides power through electrical energy, preferably an electric motor unit, but it is also conceivable that other configurations readily apparent to those skilled in the art could be used, such as pneumatic motors, internal combustion engines, hybrid motors, and similar mechanisms. The motor 400 is connected to the grinding assembly 200 via a transmission device 600. The motor 400 is substantially fixedly disposed within the first receiving space 110, and a corresponding housing within the first receiving space 110 surrounds the motor 400 and is substantially the same shape as the motor 400.

[0045] The motor 400 is positioned within the first receiving space 110 along a first straight line 101, which is parallel to the working plane 201, or the angle between the first straight line 101 and the working plane 201 is less than 90°. In the first configuration, the first straight line 101 is parallel to the working plane 201, meaning the motor 400 is horizontal. Since the diameter of the motor 400 is generally smaller than its length, this structure reduces the overall height of the belt sander 10. In the second configuration, the angle between the first straight line 101 and the working plane 201 is less than 90°, and the motor 400 is angled to accommodate various shape requirements of the housing 100. Specifically, this angle is less than or equal to 60°, 45°, 30°, 15°, 10°, etc., with smaller angles preferred to further reduce the overall height of the belt sander 10. Furthermore, the first straight line 101 is parallel to the second straight line 102, meaning the installation direction of the motor 400 is perpendicular to the movement direction of the grinding workpiece. Furthermore, the motor 400 is positioned on the rear edge of the housing.

[0046] The transmission device 600 drives the motor 400 and the grinding assembly 200. In this embodiment, the motor 400 is positioned along the rear side of the housing 100 along the direction of the first straight line 101. In this structure, the output shaft of the motor 400 is located at the edge of the first receiving space 110, and its position is approximately close to the transmission structure of the grinding assembly 200. In this case, a transmission belt structure is more suitable for the transmission device. In other embodiments, when the position of the motor 400 differs from that in this embodiment, the transmission device 600 may adopt other structures, which are not limited here.

[0047] The power supply assembly 300 is mounted to the first connecting portion 120 along the first plane 301, which is parallel to the working plane, or the angle between the first plane and the working plane is less than 90°. In the first embodiment, the first plane 301 is parallel to the working plane 201, meaning the power supply assembly 300 is horizontal. Since the thickness of the power supply assembly 300 is generally less than its length or width, this structure reduces the overall height of the belt sander 10. In the second embodiment, the angle between the first plane 301 and the working plane 201 is less than 90°, and the power supply assembly 300 is angled to accommodate various shape requirements of the housing 100. Specifically, this angle is less than or equal to 60°, 45°, 30°, 15°, 10°, etc., with smaller angles preferred to further reduce the overall height of the belt sander 10.

[0048] The first accommodating space 110 is projected onto the working plane 201 as a first projection, the first connecting portion 120 is projected onto the working plane 201 as a second projection, and the housing 100 has a third projection on the working plane 201. At least a portion of the first projection coincides with the third projection, and at least a portion of the second projection coincides with the third projection. The area of ​​the overlapping portion of the first and third projections accounts for more than or equal to 70% of the total area of ​​the first projection, meaning that at least 70% of the area of ​​the first projection is contained within the third projection. Further, the first projection coincides with the third projection, or the first projection is contained within the third projection. The area of ​​the overlapping portion of the second projection and the third projection accounts for more than or equal to 70% of the total area of ​​the second projection, meaning that at least 70% of the area of ​​the second projection is contained within the third projection. The second projection coincides with the third projection, or the second projection is contained within the third projection. In this embodiment, the area of ​​the overlapping portion of the first projection, the second projection, and the third projection accounts for more than 80% and 90% of their respective areas, respectively. In some cases, both the first and second projections completely overlap with or are included by the third projection. This ensures that the first accommodating space 110 and the first connecting portion 120 do not exceed the boundaries formed around the housing 100, or at least ensures that the motor 400 and the first connecting portion 120 do not exceed the boundaries formed around the housing 100. Based on this structure, the overall layout of the belt sander 10 is more compact.

[0049] Furthermore, the arrangement of the power supply component 300 and the motor 400 can be combined. In particular, the power supply component 300 moves along the first direction 302 within the first plane and eventually connects with the first connecting portion 120. The combination methods include, but are not limited to, the following: the first direction 302 is parallel to the first straight line 101, and the first direction 302 and the first straight line 101 have an angle. Taking the first plane 301 being parallel to the working plane 201 as an example, in the first scheme, the power supply component 300 and the motor 400 are arranged side-by-side on the housing 100. In the second scheme, especially in this embodiment, when the angle is 90 degrees, although the power supply component 300 and the motor 400 are arranged side-by-side on the housing 100, the installation direction of the power supply component 300 corresponds to the diameter of the motor 400. That is, the sum of the length of the power supply component 300 and the diameter of the motor 400 is approximately equal to the length of the housing 100 along the first direction 302, ensuring that the power supply component 300 and the motor 400 do not exceed the boundary of the housing 100 in that direction. Meanwhile, in this embodiment, the width of the power supply component 300 or the length of the motor 400 is substantially no greater than the length of the housing in the direction perpendicular to the first direction 302. Combined with the above structure, this ensures that the power supply component 300 and the motor 400 are substantially no greater than the boundaries formed around the housing 100. It should be understood that "substantially no greater than" refers to the situation where the projected area ratio is greater than 80% or 90%.

[0050] Furthermore, the first direction 302 is substantially perpendicular to the second straight line 102, that is, the mounting direction of the power supply assembly 300 is substantially parallel to the movement direction of the grinding component. The term "substantially" refers to situations that include perpendicularity or parallelism, as well as deviations from perpendicularity or parallelism within a spatial angle not exceeding 10°. Furthermore, the power supply assembly 300 is located on the front side of the housing 100. In this embodiment, the motor 400 and the power supply assembly 300 are arranged side by side above the grinding assembly.

[0051] The belt sander 10 also includes a handle 500 for the user to grip and operate. The handle 500 is connected to the housing 100. Alternatively, the power supply assembly 300 is at least partially located on a first side of the motor, and the handle 500 is at least partially located on a second side different from the first side. In this embodiment, the power supply assembly 300 is located in front of the motor 400, where "front" refers to the direction relative to the user's grip; in other words, the power supply assembly 300 is positioned on the housing 100 away from the handle 500. With this structure, the power supply assembly 300 is positioned in front, shifting the center of gravity of the belt sander 10 further forward, improving the stability of the sander's movement and preventing the tool from tilting during operation.

[0052] Furthermore, the handle 500 is connected to the outer periphery of the housing 100 and extends along the direction of the third straight line 501. The projection of the handle 500 on the working plane does not coincide with or substantially does not coincide with the projection of the housing 100 on the working plane. Substantially not coinciding means that the area of ​​the projected portion is less than 10%.

[0053] The belt sander 10 also includes a circuit board assembly 150, which is disposed within the housing 100. Specifically, the circuit board assembly 150 is disposed on top of the grinding assembly. The circuit board assembly 150 is at least partially disposed within the first receiving space 110. In this embodiment, the first receiving space 110 and the first connecting portion 120 are disposed on the same side of the grinding assembly 200, and the circuit board assembly 150 is at least partially located between the first receiving space 110 and the first connecting portion 120. The housing 100 also forms a third receiving space 151 between the first connecting portion 120 and the first receiving space 110, and the circuit board assembly 150 is at least partially disposed within the third receiving space 110. Further, the housing 110 has a third projection on the working plane, and the circuit board assembly 150 has a fourth projection on the working plane, with the fourth projection at least partially located within the third projection.

[0054] The belt sander 10 also includes a dust collection channel 140 formed in the housing 100, including a dust collection outlet 141. The projection of the dust collection channel 140 onto the working plane 201 at least partially coincides with the projection of the housing 100 onto the working plane 201. Specifically, the dust collection channel 140 is formed in the first receiving space 110 of the housing 100, extending from the housing 100 along the fourth straight line 103. The dust collection channel 140 is located around the motor 400, allowing the motor 400 to drive the abrasive chips sequentially along the inner walls of the second receiving space 130 and the first receiving space 110 to the dust collection channel 140, and then discharge them from the dust collection outlet 141. This significantly shortens the length of the dust collection channel, improving dust collection efficiency and reducing energy loss. Furthermore, the angle between the fourth straight line 103 and the third straight line 501 is greater than 90°, and the dust collection channel 140 faces the power supply assembly 300, i.e., towards the front of the tool, which is more beneficial for the operator's experience.

[0055] The belt sander in this application is like Figure 5 As shown, components that are the same as or corresponding to those in Embodiment 1 are represented by their corresponding reference numerals. For simplicity, this embodiment only describes the differences from Embodiment 1.

[0056] The motor 21 is disposed within the housing along a first straight line 20b, and the power supply assembly 23 is mounted to the first connecting portion along a first plane. The first straight line 20b is parallel to the working plane, and the first plane is parallel to the working plane. The power supply assembly 23 moves within the first plane along a second direction 20a and eventually engages with the first connecting portion. In this embodiment, the second direction 20a is parallel to the second straight line, meaning the mounting direction of the power supply assembly 23 is perpendicular to the movement direction of the grinding element. Further, the power supply assembly 23 is disposed on the side of the housing away from the handle, closer to the front edge of the housing. The motor 21 and the transmission device are disposed between the power supply assembly 23 and the handle. The first straight line 20b and the second straight line are perpendicular to each other, or the first straight line 20b and the second straight line have an angle, which is not equal to 0°, meaning the extension direction of the motor 21 is perpendicular to or has an angle with the movement direction of the grinding element. Based on the above, the first straight line 20b and the second direction 20a are perpendicular or inclined at a certain angle.

[0057] Furthermore, the transmission device in this embodiment is a combination of multi-stage transmission structures to accommodate the structure where the output shaft of the motor 21 faces rearward when it is arranged along the first straight line 20b. The transmission device is located on the side near the handle, that is, near the rear edge of the housing. The projection of the transmission device in the working plane is at least partially located within the projection of the grinding assembly 22 in the working plane. The motor 21 is disposed within the first accommodating space formed between the transmission device and the power supply assembly 23. The transmission device includes a primary transmission assembly 25 and a secondary transmission assembly 26 connected in sequence. The primary transmission assembly 25 connects the output shaft and the secondary transmission assembly 26, and the secondary transmission assembly 26 connects the primary transmission assembly 25 and the grinding assembly 22. Specifically, the primary transmission assembly 25 is a transmission structure including bevel gears, and the secondary transmission assembly 26 is a transmission structure based on a transmission belt.

[0058] Furthermore, the belt sander 20 also includes a dust collection channel 24, which is formed in the housing and includes a dust collection outlet. The projection of the dust collection channel 24 onto the working plane at least partially coincides with the projection of the housing onto the working plane. In this embodiment, the dust collection channel 24 is disposed between the transmission device and the power supply assembly 23 and extends in a direction parallel to or inclined relative to the direction of the first straight line 20.

[0059] For ease of explanation of the technical solution of this application, the following are also defined: Figure 6 The middle arrows indicate up, down, forward, and backward. In this implementation, up, down, left, and right all refer to... Figure 6 Take the state of belt sander 30 in the example.

[0060] like Figure 6-7As shown, the belt sander 30 includes a secondary handle 31, which is formed at the front end of the housing. In this embodiment, "front" and "rear" refer to the positions relative to the user when holding the sander. The secondary handle 31 has a retracted state and a usage state. When the secondary handle 31 is in the retracted state, as shown... Figure 6 As shown, the orthographic projection of the auxiliary handle 31 onto the working plane at least partially coincides with the orthographic projection of the grinding assembly onto the working plane. When the auxiliary handle 31 is switched to the use state, as... Figure 7 As shown, the secondary handle 31 extends away from the housing. In other words, the secondary handle 31 is movably connected to the housing, allowing it to move between a retracted state and a usage state. When the secondary handle 31 is in the retracted state, it at least partially covers the power supply assembly, the motor, or a portion of the housing. In different layouts, the structure at the front end varies. In this embodiment, the power supply assembly is located at the very front of the housing, and the secondary handle 31 at least partially covers a portion of the power supply assembly.

[0061] Specifically, the handle is formed on one side of the housing, and the auxiliary handle 31 is formed on the other side of the housing, such that the power supply assembly and the motor are located between the auxiliary handle 31 and the handle. Here, "the power supply assembly and the motor are located between the auxiliary handle 31 and the handle" means that the entire or substantially all of the structure of the power supply assembly and the motor is located between the auxiliary handle 31 and the handle. "Substantially" means that at least 80% of the volume of the power supply assembly and the motor is located between the auxiliary handle 31 and the handle.

[0062] Specifically, the secondary handle 31 includes a rotating rod portion 31b and a grip portion 31a. One end of the rotating rod portion 31b is connected to the housing, and the other end is connected to the grip portion 31a. A second connecting portion 33, which connects to the secondary handle 31, is formed at the front end of the housing. The second connecting portion 33 and the first connecting portion are located at different positions within the housing. In this embodiment, the second connecting portion 33 is formed at a position in the housing that is further forward and lower than the first connecting portion, so that the power supply assembly does not interfere with the movement of the secondary handle 31 during its movement. The rotating rod portion 31b is arc-shaped or bent, so that when the secondary handle 31 is in the retracted state, the grip portion 31a is located on one side of the power supply assembly. Further, the grip portion 31a abuts against or approaches the upper or front side of the power supply assembly. In other embodiments, when the motor or other housing portion is located at the front end, the secondary handle 31 at least partially covers the other parts of the motor or housing, and the grip portion 31a abuts against or approaches the upper or front side of the aforementioned structure.

[0063] Furthermore, the second connecting part 33 is provided with a fixed shaft (not shown in the figure), and the auxiliary handle 31 can rotate around the fixed axis 32. The second connecting part 33 includes a cutout 33a, and one end of the rotating rod part 31b is disposed in the cutout 33a and connected to the fixed shaft. The fixed shaft is also connected to an adjusting member 34, which can tension the auxiliary handle 31 and fix it in a certain position. This position can be a stored state or a used state, and in the used state, it also includes multiple usage angles. Figure 7 The usage state shown is the extreme position of the secondary handle 31. At this time, the center line connecting the grip part 31a and the handle is basically parallel to the working plane and does not hinder the operation of the polishing component.

[0064] like Figure 8 As shown, the handle assembly 500 forms a first grip portion 503, which is held by the user to propel the belt sander 10 forward. A connection portion 504 is formed between the handle assembly 500 and the housing 100 enclosing the motor 400. It should be noted that the first grip portion 503 and the connection portion 504 are separate; the switch 510 controlling the start and stop of the motor 400 is located in the area of ​​the grip portion 503, but not in the area of ​​the connection portion 504. The first connection portion 120 is at least partially located on the upper side of the sanding assembly 22.

[0065] When the belt sander 10 is placed on the working plane 201, the maximum distance from the power supply assembly 23 to the working plane 201 is the first height H1, and the height from the handle 500 to the working plane 201 is the second height H2. The absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 5cm.

[0066] In other words, in this embodiment, the height from the top of the power supply assembly 23 to the working plane 201 is the first height H1, and the height from the top of the handle 500 to the working plane 201 is the second height H2. The absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 5 cm. In one embodiment, the absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 3 cm. In one embodiment, the absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 2 cm. In one embodiment, the absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 1 cm. In one embodiment, the first height H1 is greater than or equal to the second height H2. This configuration makes the belt sander 10 occupy less space in the overall height direction, making it more convenient.

[0067] In one embodiment, the power supply assembly 300 is configured to be detachably connected to the first connection portion 120. In another embodiment, the power supply assembly 300 may also be disposed within the internal space of the housing 100, making it impossible to plug in or remove.

[0068] Continue as Figure 8 As shown, the power supply component 300 is a power supply component, and the power supply component 300 is disposed directly above the grinding component 22, that is, the orthographic projection of the power supply component 300 on the working plane 201 is inside the orthographic projection of the grinding component 22 on the working plane 201.

[0069] The power supply assembly 300 is a cube with multiple surfaces. It should be noted that "surface" here refers to a surface through which the power supply assembly 300 can be stably placed on a plane. Specifically, by this standard, the power supply assembly 300 in this application includes six surfaces: an upper surface 302, a lower surface, a left surface, a right surface, a front surface, and a rear surface. In this embodiment, the power supply assembly 300 is a hexahedron. Further, in this embodiment, the power supply assembly 300 is a parallelepiped.

[0070] In one embodiment, when the power supply assembly 300 is mounted to the belt sander 10, at least one surface 310 of the power supply assembly 300 (see...) Figure 7 The upper surface 311 and lower surface 312 of the power supply assembly 300 are parallel to the working plane 201. In one embodiment, the two surfaces of the power supply assembly 300 are parallel to the working plane 201. In this embodiment, the upper surface 311 and lower surface 312 of the power supply assembly 300 are substantially parallel to the working plane 201. It should be noted that "substantially parallel" in this application means that the angle between two planes, two lines, or a line and a plane is less than or equal to 10 degrees.

[0071] like Figure 9 As shown, the handle 520 may also be formed on the upper housing of the motor 400. The motor 400 is at least partially located between the power supply assembly 300 and the handle 520.

[0072] In this application, the power supply assembly 300 is at least partially located on the front or rear side of the motor 400. It should be noted that "front" and "rear" here refer to the forward and backward movement direction of the belt sander 10; see [link to relevant documentation] for details. Figure 1 The directional coordinates in the diagram. The motor shaft of motor 400 can extend along the front-back direction of belt sander 10 (e.g., ...). Figure 5 It can also extend along the left and right directions of the belt sander 10 (e.g.) Figure 4 ).

[0073] like Figure 10 As shown, unlike the aforementioned scheme, the power supply assembly 300 is located between the motor 400 and the handle 530. In one embodiment, if the insertion / removal direction of the power supply assembly 300 is inclined to the working plane 201, the power supply assembly 300 may be partially located on the upper side of the motor 400, and partially located on the front or rear side of the motor 400.

[0074] like Figure 11As shown, unlike the aforementioned scheme, the power supply assembly 300 is located behind the motor 400, and the handle 540 is located above the motor 400 and the power supply assembly 300. In one embodiment, the handle 500 may be configured to be rotatable, facilitating the storage of the belt sander 10 in a smaller space when not in use.

[0075] With the technical solution involved in this application, the weight of the power supply component 300 is naturally applied to the grinding component 22 of the belt sander 10, which reduces the force required for the user to press the handle and reduces user fatigue. Furthermore, this arrangement helps to reduce the overall height of the machine, saving space and facilitating storage.

[0076] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this application.

Claims

1. A belt sander, comprising: The shell forms a first accommodating space; The handle is connected to the housing; A grinding assembly, connected to the housing, is used to perform grinding operations on a workpiece, wherein the plane in contact with the workpiece is the working plane; An electric motor, located within the first accommodating space, is used to provide power for the operation of the grinding assembly; The power supply unit provides energy to the belt sander; Its features are: The housing also forms a first connection portion for connecting the power supply assembly. The first connection portion is located on the upper side of the grinding assembly, and the power supply assembly is at least partially located on the front or rear side of the motor. The power supply assembly is mounted to the first connection portion along a first plane, and the angle between the first plane and the working plane is less than or equal to 10°.

2. The belt sander according to claim 1, characterized in that, The motor is at least partially located between the power supply assembly and the handle.

3. The belt sander according to claim 1, characterized in that, The motor is disposed within the first accommodating space along a first straight line, the first straight line being parallel to the working plane, or the angle between the first straight line and the working plane being less than 90°.

4. The belt sander according to claim 1, characterized in that, The motor is disposed in the first accommodating space along a first straight line, and the power supply assembly is mounted to the first connecting part along a first plane, wherein the first straight line is parallel to or coincides with the first plane.

5. The belt sander according to claim 1, characterized in that, The motor is disposed in the first accommodating space along a first straight line, and the power supply assembly is mounted to the first connecting part along a first plane, wherein the angle between the first straight line and the first plane is less than 90°.

6. The belt sander according to claim 1, characterized in that, The first accommodating space is projected onto the working plane as a first projection, the first connecting portion is projected onto the working plane as a second projection, and the housing is projected onto the working plane as a third projection; at least a portion of the first projection coincides with the third projection, and at least a portion of the second projection coincides with the third projection.

7. The belt sander according to claim 6, characterized in that, The area of ​​the overlapping portion of the first projection and the third projection accounts for more than 70% of the total area of ​​the first projection.

8. The belt sander according to claim 7, characterized in that, The first projection coincides with the third projection, or the first projection is included by the third projection.

9. The belt sander according to claim 6, characterized in that, The area of ​​the overlapping portion of the second projection and the third projection accounts for more than or equal to 70% of the total area of ​​the second projection.

10. The belt sander according to claim 9, characterized in that, The second projection coincides with the third projection, or the second projection is included by the third projection.

11. The belt sander according to claim 1, characterized in that, It also includes a circuit board assembly disposed within the housing.

12. The belt sander according to claim 3, characterized in that, It also includes a circuit board assembly, which is at least partially disposed within the first accommodating space.

13. The belt sander according to claim 12, characterized in that, The circuit board assembly is at least partially located between the first receiving space and the first connecting portion.

14. The belt sander according to claim 1, characterized in that, It also includes a dust collection channel formed in the first receiving space of the housing and extending from the housing along a second straight line, including a dust collection outlet for dust discharge.

15. The belt sander according to claim 1, characterized in that, It also includes a secondary handle, which is formed at the front end of the housing.

16. The belt sander according to claim 15, characterized in that, The secondary handle is movably connected to the housing, allowing it to move between a stowed state and a usable state; when the secondary handle is in the stowed state, it at least partially covers the power supply assembly, the motor, or a portion of the housing.

17. The belt sander according to claim 1, characterized in that, The ratio of the height of the grinding component to the overall height of the belt sander when the power supply component is installed is greater than or equal to 0.2 and less than or equal to 0.

68.

18. A belt sander, comprising: The shell forms a first accommodating space; The handle is connected to the housing; A grinding assembly, connected to the housing, is used to perform grinding operations on a workpiece, wherein the plane in contact with the workpiece is the working plane; An electric motor is used to provide power for the operation of the grinding assembly; The power supply unit provides energy to the belt sander; Its features are: The housing also forms a first connection portion for connecting the power supply assembly, the first connection portion being at least partially located on the upper side of the polishing assembly; When the belt sander is placed on the working plane, the maximum distance from the power supply assembly to the working plane is the first height H1, and the height from the handle to the working plane is the second height H2. The absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 5cm. The power supply assembly is installed along the first plane to the first connecting part, and the angle between the first plane and the working plane is less than or equal to 10°.

19. The belt sander according to claim 18, characterized in that, The absolute value of the difference between the first height H1 and the second height H2 is less than or equal to 3cm.

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