Sanding machine

Abstract

The utility model discloses a sanding machine. The sanding machine comprises a machine shell; the bottom plate assembly comprises a bottom plate, and the bottom plate is connected with a working accessory; the driving assembly comprises a motor which is used for driving the bottom plate; the dust channel is arranged in the machine shell and comprises a dust inlet and a dust outlet, and dust is collected from the bottom plate, flows into the dust channel through the dust inlet and then flows into the dust collecting device through the dust outlet; the bottom plate extends in the first plane, and the projection of the dust channel on the first plane is basically arc-shaped; the projection of the dust outlet on the first plane is located in the boundary of the bottom plate. The integrality between the dust collecting device and the machine shell is high; through the structural arrangement of the dust channel, the dust flowing resistance is reduced, and smooth dust collection is achieved.

Description

Technical Field

[0001] The present application relates to a power tool, and more particularly to a sander. Background Art

[0002] A sander in the related art is a power tool for grinding operations. It is often used to grind uneven or uneven-thickness walls, desktops, etc. to obtain a surface with a target smoothness. A sander is also known as a belt sander, a grinder or a polishing machine, etc. A handheld sander is an important classification of sanders, and is widely used in various industries due to its small size and easy portability.

[0003] When the sander performs grinding operations, dust will be generated. The dust can be discharged in a specific direction after being inhaled into the interior of the sander housing. The dust discharge path usually adopts a bent straight line, and the resistance received by the dust is large. Generally, a dust collection bag is provided on the housing for collecting dust. The integrity between the dust collection bag and the housing is poor, which is not convenient for spatial layout.

[0004] This part provides background information related to the present application, and these background information are not necessarily prior art. Utility Model Content

[0005] An object of the present application is to solve or at least alleviate some or all of the above problems. To this end, an object of the present application is to provide a sander.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] A sander, comprising: a housing; a bottom plate assembly including a bottom plate; a drive assembly including a motor for driving the bottom plate; a dust passage disposed in the housing, the dust passage including an inlet and an outlet, dust is collected from the bottom plate and flows into the dust passage through the inlet, and then flows into the dust collection device through the outlet; the bottom plate extends in a first plane, and the projection of the dust passage on the first plane is substantially arc-shaped; the projection of the outlet on the first plane is located within the boundary of the bottom plate.

[0008] In some embodiments, the height difference H1 between the outlet and the inlet in the vertical direction is greater than or equal to 9 mm and less than or equal to 41 mm.

[0009] In some embodiments, the included angle between the line connecting the inlet to the center point of the bottom plate and the line connecting the outlet to the center point of the bottom plate is a first angle α, and the first angle α is greater than or equal to 60 degrees and less than or equal to 120 degrees.

[0010] In some embodiments, the projection of the dust passage on the first plane is a first projection, and the first projection is completely located within the boundary of the bottom plate.

[0011] In some embodiments, the projection of the dust collection device on the first plane is a second projection, and the second projection is completely within the boundary of the bottom plate.

[0012] In some embodiments, the dust channel extends spirally between the dust inlet and the dust outlet.

[0013] In some embodiments, the dust collection device has an air inlet, the air inlet is communicated with the dust outlet, and the area of the air inlet is less than or equal to 400 square millimeters.

[0014] In some embodiments, the dust collection device has a dust collection chamber, an air inlet and an air outlet communicated with the dust collection chamber. In the vertical direction, the bottommost edge of the air inlet is higher than the bottom surface of the dust collection chamber, and the height difference H2 between them is greater than or equal to 5 mm and less than or equal to 20 mm.

[0015] In some embodiments, the dust collection device has a dust collection chamber, an air inlet and an air outlet communicated with the dust collection chamber. The air inlet is communicated with the dust outlet, and a filter element is arranged at the air outlet.

[0016] In some embodiments, the filter element includes a bracket and a filter paper. The filter paper is installed on the bracket, and the bracket is detachably connected to the air outlet.

[0017] In some embodiments, at least two air outlets are provided.

[0018] In some embodiments, the dust collection device has a dust collection chamber, an air inlet and an air outlet communicated with the dust collection chamber. The air inlet is communicated with the dust outlet, the air outlet is located on one side of the dust collection device close to the housing, and a gap is formed between the dust collection device and the housing. The gap communicates the air outlet with the outside.

[0019] In some embodiments, the dust collection device has a dust collection chamber, and a cyclone dust collection assembly is arranged in the dust collection chamber. The cyclone dust collection assembly has an air inlet, a dust discharge port and an air outlet. The air inlet is communicated with the dust outlet, the dust discharge port is communicated with the dust collection chamber, and the air outlet is communicated with the outside.

[0020] In some embodiments, the dust collection device is detachably installed on the housing.

[0021] In some embodiments, the housing includes a mounting plate, the mounting plate has a mounting surface, the dust collection device is detachably connected to the mounting surface, and the mounting surface is a mirror-finished surface.

[0022] In some embodiments, a first electrostatic conduction assembly is arranged on the dust collection device, and the first electrostatic conduction assembly is used to conduct the static electricity of the dust collection device.

[0023] In some embodiments, a second electrostatic conduction component is further included. The second electrostatic conduction component includes a first conductive member and a second conductive member. Two ends of the first conductive member are respectively connected to the dust channel and the stator core of the motor, and two ends of the second conductive member are respectively connected to the stator core and the housing.

[0024] A sander includes: a housing including a top shell, a bottom shell, and a contraction part disposed between the top shell and the bottom shell; a bottom plate assembly including a bottom plate; a driving assembly including a motor for driving the bottom plate; and a lighting device including a light emitting part. The light emitting part is disposed on the housing and above the contraction part, and the bottom plate is within the illumination range of the light emitting part.

[0025] In some embodiments, the light emitting part is disposed at the junction of the contraction part and the top shell.

[0026] In some embodiments, the lighting device is detachably disposed relative to the housing.

[0027] In some embodiments, the light emitting part is one or a combination of at least two of a point light source, a surface light source, and an LED light source.

[0028] In some embodiments, the lighting device can be turned on when the motor is started, and the lighting device can be turned off after a preset time when the motor stops rotating.

[0029] In some embodiments, the light emitting part can emit light of at least two colors, and / or the lighting device is configured to be able to adjust the brightness of the light emitting part according to the ambient brightness.

[0030] In some embodiments, the lighting device can perform at least one of safety indication, fault indication, battery pack power reminder, or image projection.

[0031] In some embodiments, the lighting device further includes a switch component that can: turn on and off the light emitting part, and / or adjust the brightness of the light emitting part, and / or select the light emitting color of the light emitting part, and / or trigger the light emitting part to project an image, and / or select the light emitting mode of the light emitting part.

[0032] In some embodiments, the lighting device is configured to be able to transmit control signals to and from a user terminal to adjust the light emitting parameters of the light emitting part.

[0033] A sander, comprising: a housing; a bottom plate assembly including a bottom plate; a drive assembly including a motor for driving the bottom plate; a dust passage disposed within the housing, dust being collected from the bottom plate and flowing into the dust passage, and then flowing through the dust passage into a dust collection device; a lighting device including a light-emitting part; and the light-emitting part being disposed on the dust collection device.

[0034] In some embodiments, the light-emitting part is arranged circumferentially around the dust collection device.

[0035] In some embodiments, the light-emitting part is disposed inside and / or outside the dust collection device.

[0036] In some embodiments, the dust collection device is detachably connected to the housing, and the dust collection device has an assembled state assembled to the housing, and when the dust collection device is in the assembled state, the lighting device is turned on.

[0037] The advantages of the present application are as follows: By providing a dust passage within the housing, dust is collected from the bottom plate and flows into the dust passage, and then flows through the dust passage into the dust collection device, and the integrity between the dust collection device and the housing is strong; for the dust passage, in the vertical direction, the dust outlet is higher than the dust inlet, and the projection of the dust passage on the first plane is substantially arc-shaped to reduce the resistance of dust flow and achieve smooth dust collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic structural view of a sander provided by the present application;

[0039] Figure 2 is an exploded structural schematic view of a sander provided by the present application Figure 1 ;

[0040] Figure 3 is an exploded structural schematic view of a sander provided by the present application Figure 2 ;

[0041] Figure 4 is an exploded structural schematic view of a sander provided by the present application Figure 3 ;

[0042] Figure 5 is a partial structural schematic view of a sander provided by the present application;

[0043] Figure 6 is a partial structural front view of a sander provided by the present application;

[0044] Figure 7 is a partial structural top view of a sander provided by the present application;

[0045] Figure 8 is a schematic structural view of a dust collection device and a filter element provided by the present application;

[0046] Figure 9 is a schematic exploded view of a dust collection device and a filter element provided by this application;

[0047] Figure 10 is a schematic structural view of a dust collection device provided by this application;

[0048] Figure 11 is a front view of a dust collection device provided by this application;

[0049] Figure 12 is a schematic structural view of another dust collection device provided by this application;

[0050] Figure 13 is a front view of another dust collection device provided by this application;

[0051] Figure 14 is a schematic structural view of yet another dust collection device provided by this application;

[0052] Figure 15 is a partial structural schematic of yet another dust collection device provided by this application Figure 1 ;

[0053] Figure 16 is a cross-sectional view of yet another dust collection device provided by this application;

[0054] Figure 17 is a partial structural schematic of yet another dust collection device provided by this application Figure 2 ;

[0055] Figure 18 is a partial structural schematic of yet another dust collection device provided by this application Figure 3 ;

[0056] Figure 19 is a front view of another sander provided by this application;

[0057] Figure 20 is a side view of another sander provided by this application;

[0058] Figure 21 is a schematic structural view of yet another sander provided by this application.

[0059] In the figure:

[0060] 100, sander;

[0061] 10. Housing; 101. First mating surface; 102. Top of the housing; 103. Bottom of the housing; 104. Shrinkage part; 11. Holding part; 12. Dust channel; 121. Dust inlet; 122. Dust outlet; 13. Mounting plate; 131. First mounting surface; 132. Second mounting surface; 14. Ball buckle

[0062] 20. Bottom plate assembly; 21. Bottom plate

[0063] 30. Driving assembly; 31. Motor; 32. Control board; 33. Speed regulation assembly; 34. Airflow element

[0064] 40. Main switch assembly

[0065] 51. Dust collection device; 510. Second mating surface; 511. Dust collection chamber; 512. Air inlet; 513. Air outlet; 514. Cyclone dust collection assembly; 5141. Dust discharge port; 52. Filter element; 521. Bracket; 522. Filter paper

[0066] 60. Energy source

[0067] 70. Lighting device; 71. Light emitting part Detailed implementation mode

[0068] Before explaining any implementation mode of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings

[0069] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including that element

[0070] In the present application, the term "and / or" is a relationship describing associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the present application, the character " / " generally represents an "and / or" relationship between the preceding and following associated objects

[0071] In this application, the terms "connected", "combined", "coupled", "installed" may be direct connection, combination, coupling or installation, or may be indirect connection, combination, coupling or installation. Among them, by way of example, direct connection means that two parts or components are connected together without the need to set up intermediate parts, and indirect connection means that two parts or components are respectively connected to at least one intermediate part, and these two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.

[0072] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (such as "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances due to manufacturing, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. Relative terms may refer to a plus or minus of a certain percentage (such as 1%, 5%, 10% or more) of the indicated value. Numerical values without the use of relative terms should also be disclosed as specific values with tolerances. In addition, when expressing a relative angular positional relationship (such as substantially parallel, substantially perpendicular), "substantially" may refer to a plus or minus a certain number of degrees (such as 1 degree, 5 degrees, 10 degrees or more) based on the indicated angle.

[0073] In this application, those of ordinary skill in the art will understand that the functions performed by a component may be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part may also be performed by one part, one component, or a combination of multiple parts.

[0074] In this application, the directional terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the directional terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive direction, but can also be understood as the side direction. For example, below may include directly below, lower left, lower right, lower front, and lower rear, etc.

[0075] Such as Figures 1 to 7As shown in the figure, the sander 100 includes a housing 10, a bottom plate assembly 20, a drive assembly 30, a main switch assembly 40, a dust collection device 51, and an energy source 60. The energy source 60 is used to supply energy to the sander 100. The energy source 60 can be alternating current or direct current such as a battery pack or other portable mobile power source. The dust collection device 51 can be a dust collection bag, a dust collection box, or the sander 100 can be connected to a vacuum cleaner, with the vacuum cleaner serving as the dust collection device 51. In this embodiment, taking the dust collection device 51 as a dust collection box as an example, the dust collection device 51 is in a box shape, further enhancing the integrity with the housing 10.

[0076] The dust collection device 51 is detachably installed on the housing 10, facilitating the dumping of the dust in the dust collection device 51. The dust collection device 51 has an assembled state where it is assembled with the housing 10 and a disassembled state where it is detached from the housing 10. When the dust collection device 51 is in the assembled state, the housing 10 and the dust collection device 51 together form the outer shape part of the sander 100, with strong integrity, facilitating use, storage, and transportation. For the dust collection device 51, in order to form an integral whole with the housing 10, the dust collection device 51 can be set in an arc shape. When the dust collection device 51 is in the assembled state, the top surface, bottom surface, and inner surface of the dust collection device 51 are basically in contact with the housing 10. A broken line shape approximated by multiple straight lines spliced together to form an arc is also considered to be the same as the technical concept of this application and is also covered within the protection scope of this application.

[0077] The housing 10 and / or the dust collection device 51 form a holding part 11 for the user to hold. The main switch assembly 40 is arranged on the front side of the housing 10 and the holding part 11, enabling the user to trigger the main switch assembly 40 relatively conveniently when holding the holding part 11. A receiving part is formed on the rear side of the housing 10 for installing an energy source 60 such as a battery pack.

[0078] The bottom plate assembly 20 is arranged at the bottom of the housing 10, and the drive assembly 30 is arranged inside the housing 10. The bottom plate assembly 20 includes a bottom plate 21, and the bottom plate 21 is connected to a working accessory; the drive assembly 30 includes a motor 31, and the motor 31 is used to drive the bottom plate 21, so that the bottom plate 21 drives the working accessory to swing relative to the housing 10. The bottom plate 21 includes an upper surface and a lower surface arranged opposite to each other, and the lower surface is used to install the working accessory, and the working accessory can be a functional element such as sandpaper. When the bottom plate 21 makes an eccentric movement, the sandpaper can continuously rub on the surface of the workpiece to be polished, thereby realizing functions such as grinding and polishing of the workpiece to be polished.

[0079] The sander 100 further includes a dust channel 12 arranged inside the housing 10. Dust is collected from the bottom plate 21 and flows into the dust channel 12, and then flows into the dust collection device 51 through the dust channel 12. Specifically, through holes are provided on the bottom plate 21, and the through holes penetrate the upper surface and the lower surface, and the dust enters the dust channel 12 through the through holes.

[0080] The motor 31 includes a motor shaft for outputting power, and the motor shaft rotates about the motor axis. In this embodiment, the motor axis extends substantially in the vertical direction. The sander 100 further includes an air flow element 34 that can be driven by the motor 31. The air flow element 34 can be driven by the motor 31 to rotate about the central axis. When the air flow element 34 rotates, an air flow can be generated, and the air flow drives the dust to be collected from the bottom plate 21 and flow into the dust channel 12, and then flows into the dust collection device 51 through the dust channel 12.

[0081] A control board 32 and a speed regulation component 33 are further provided in the housing 10. The control board 32 is electrically connected to the motor 31, and the speed regulation component 33 is electrically connected to the control board 32. The speed of the motor 31 can be controlled through the speed regulation component 33, and the speed regulation component 33 can be controlled by a speed regulation button on the housing 10.

[0082] The dust channel 12 includes a dust inlet 121 and a dust outlet 122. The inhaled dust flows from the dust inlet 121 to the dust outlet 122. In the vertical direction, the dust outlet 122 is higher than the dust inlet 121; the bottom plate 21 extends in a first plane, and the projection of the dust channel 12 on the first plane is substantially arc-shaped to reduce the resistance of dust flow and achieve smooth dust collection. It should be noted that the arc involved in this application can be a circular arc along the inner contour of the housing, or other arcs such as a curve or an involute that are non-circular arcs.

[0083] For the dust channel 12, the smaller the height difference between the dust outlet 122 and the dust inlet 121, the smaller the resistance of air flow. However, the dust outlet 122 is connected to the dust collection device 51, and the higher the dust outlet 122, the less likely the dust collection device 51 is to be blocked by dust. The height difference H1 between the dust outlet 122 and the dust inlet 121 in the vertical direction is greater than or equal to 9 mm and less than or equal to 41 mm. In some embodiments, the height difference H1 between the dust outlet 122 and the dust inlet 121 in the vertical direction is greater than or equal to 15 mm and less than or equal to 30 mm. In some embodiments, the height difference H1 between the dust outlet 122 and the dust inlet 121 in the vertical direction is equal to 27 mm.

[0084] The included angle formed by the line connecting the dust inlet 121 to the center point of the bottom plate 21 and the line connecting the dust outlet 122 to the center point of the bottom plate 21 is the first angle α. The first angle α is greater than or equal to 60 degrees and less than or equal to 120 degrees to reduce the resistance of the airflow flowing in the dust channel 12. In some embodiments, the first angle α is greater than or equal to 80 degrees and less than or equal to 100 degrees. In some embodiments, the first angle α is equal to 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees or 120 degrees. In one embodiment, both the dust inlet 121 and the dust outlet 122 of the dust channel 12 are located within the housing 10. In one embodiment, the projection of the dust outlet 122 of the dust channel 12 in the first plane does not exceed the boundary range of the bottom plate 21. In one embodiment, the bottom plate 21 is substantially rectangular, and the center point of the bottom plate 21 is the center point of the rectangular surface.

[0085] In some embodiments, the dust channel 12 extends spirally between the dust inlet 121 and the dust outlet 122, causing the dust channel 12 to rise gently and reducing the airflow resistance. In some embodiments, the dust channel 12 extends linearly between the dust inlet 121 and the dust outlet 122.

[0086] The projection of the dust channel 12 on the first plane is the first projection, and the first projection is completely located within the boundary of the bottom plate 21, making the structure compact and the center of gravity stable. The projection of the dust collection device 51 on the first plane is the second projection, and the second projection is completely located within the boundary of the bottom plate 21, making the structure compact and the center of gravity stable. There may be an overlapping part between the first projection and the second projection. The area of the second projection exceeds half of the area of the bottom plate 21.

[0087] A first electrostatic conduction component is provided on the dust collection device 51, and the first electrostatic conduction component is used to conduct the static electricity of the dust collection device. The first electrostatic conduction component can be a metal sheet, such as a copper sheet.

[0088] The sander 100 further includes a second electrostatic conduction component. The second electrostatic conduction component includes a first conductive member and a second conductive member. Two ends of the first conductive member are respectively connected to the dust channel 12 and the stator core of the motor 31, and two ends of the second conductive member are respectively connected to the stator core and the housing 10. Since a person holds the housing 10, the static electricity on the dust channel 12 is conducted out through the person's hand by the second electrostatic conduction component.

[0089] As Figure 8 and Figure 9 shown, the dust collection device 51 has a dust collection chamber 511, an air inlet 512 and an air outlet 513 that communicate with the dust collection chamber 511. The air inlet 512 communicates with the dust outlet 122 of the dust channel 12. Therefore, dust can enter the dust collection device 51 from the dust channel 12. The air outlet 513 communicates with the outside. After the airflow with dust enters the dust collection device 51, the dust falls into the dust collection chamber 511 under the action of its own gravity, and the airflow flows out from the air outlet 513.

[0090] The air inlet 512 is communicated with the dust outlet 122 of the dust path 12. The area of the air inlet 512 is less than or equal to 400 square millimeters, ensuring sufficient air intake while making full use of the space. In some embodiments, the area of the air inlet 512 is less than or equal to 350 square millimeters. In some embodiments, the area of the air inlet 512 is less than or equal to 300 square millimeters. In some embodiments, the area of the air inlet 512 is equal to 250 square millimeters, 260 square millimeters or 270 square millimeters.

[0091] A filter element 52 is provided at the air outlet 513 of the dust collection device 51. If a small amount of dust flows out from the air outlet 513 along with the air flow, the filter element 52 can filter the dust to avoid dust overflow. The filter element 52 includes a bracket 521 and a filter paper 522. The filter paper 522 is installed on the bracket 521, and the bracket 521 is detachably connected to the air outlet 513. The bracket 521 supports the filter paper 522. The bracket 521 is convenient for installation and disassembly. When replacing the filter paper 522, the bracket 521 can be disassembled, and after replacing the filter paper 522, the bracket 521 is reinstalled. The connection between the bracket 521 and the dust collection device 51 can be a snap connection.

[0092] As Figure 10 shown, there is one air outlet 513 and it is located at the top of the dust collection device 51. As Figure 11 shown, in the vertical direction, the lowermost edge of the air inlet 512 is higher than the bottom surface of the dust collection chamber 511, and the height difference H2 between them is greater than or equal to 5 mm and less than or equal to 20 mm, avoiding the dust in the dust collection chamber 511 from overflowing from the air inlet 512, preventing the air inlet 512 from being blocked, enabling the dust collection chamber 511 to have a certain space and increasing the dust collection capacity.

[0093] As Figure 12 and Figure 13 shown, there are at least two air outlets 513, increasing the air permeability and air discharge volume, making the dust collection smoother. The air outlets 513 can be arranged at the top or on the side of the dust collection device 51. Specifically, the air outlet 513 is located on the side of the dust collection device 51 close to the housing 10, that is, the air outlet 513 is arranged on the inner side surface of the dust collection device 51, making the outer surface of the dust collection device 51 flat.

[0094] A filter element 52 is provided at each air outlet 513, and the filter element 52 can filter the dust to avoid dust overflow.

[0095] In the layout where the air outlet 513 is located on the side of the dust collection device 51 close to the housing 10, in order to facilitate air discharge, a gap is formed between the dust collection device 51 and the housing 10, and the gap communicates the air outlet 513 with the outside. As Figure 2As shown, the housing 10 includes a first mating surface 101, and the inner surface of the dust collection device 51 is a second mating surface 510. After the dust collection device 51 is assembled with the housing 10, a gap is formed between the first mating surface 101 and the second mating surface 510, facilitating the air outlet 513 to discharge air. The size of the gap is 1 mm to 3 mm, preferably 2 mm.

[0096] As Figure 2 shown, the housing 10 includes a mounting plate 13. The mounting plate 13 has a first mounting surface 131, and the dust collection device 51 is detachably connected to the first mounting surface 131. The first mounting surface 131 is a mirror-finished surface, reducing the friction during assembly and facilitating the disassembly and assembly of the dust collection device 51.

[0097] The dust collection device 51 and the housing 10 can be snap-connected. Specifically, a ball snap 14 can be used for connection. The ball snap 14 is arranged on the first mounting surface 131. During installation, the dust collection device 51 is pushed towards the housing 10, so that the dust collection device 51 slides along the first mounting surface 131 until it is snap-connected to the ball snap 14. Since the first mounting surface 131 is a mirror-finished surface, the friction during assembly is reduced.

[0098] The mounting plate 13 further includes a second mounting surface 132. The second mounting surface 132 is located on the outer periphery of the first mounting surface 131 and is lower than the first mounting surface 131. The roughness of the second mounting surface 132 is higher than that of the first mounting surface 131. The dust collection device 51 abuts against the second mounting surface 132, increasing the contact area and friction between the dust collection device 51 and the housing 10, making the connection firm.

[0099] As Figures 14 to 18 shown, in one embodiment, the dust collection device 51 has a dust collection chamber 511. A cyclone dust collection assembly 514 is arranged in the dust collection chamber 511. The cyclone dust collection assembly 514 has an air inlet 512, a dust discharge port 5141, and an air outlet 513. The air inlet 512 is communicated with the dust outlet 122, the dust discharge port 5141 is communicated with the dust collection chamber 511, and the air outlet 513 is communicated with the outside. Due to the arrangement of the cyclone dust collection assembly 514, there is no need to set the air inlet 512 higher than the bottom surface of the dust collection chamber 511, and the dust in the dust collection chamber 511 will not overflow from the air inlet 512.

[0100] The working principle of the cyclone dust collection assembly 514 is a conventional technology and will not be elaborated here. The airflow with dust enters from the air inlet 512 and then rises. Under the action of the cyclone dust collection assembly 514, the dust falls from the dust discharge port 5141, and the airflow is discharged from the air outlet 513. The air outlet 513 can be arranged on the outer side wall of the dust collection device 51. Therefore, the top of the dust collection device 51 does not need to be opened and can be sealed.

[0101] As Figure 19 and Figure 20As shown, the sander 100 further includes a lighting device 70. The housing 10 includes a housing top 102, a housing bottom 103, and a constricted portion 104 provided between the housing top 102 and the housing bottom 103. The constricted portion 104 is a portion of the housing 10 that is formed to constrict inward. In the field of sanders, the constricted portion 104 is often used for users to hold, thus forming a holding area different from the housing top 102. During the upward extension of the constricted portion 104 to the housing top 102, a transition portion 105 is formed. When a user holds the constricted portion 104, the thumb can support the transition portion 105, and the fingers can rest on the housing top 102.

[0102] Nowadays, with the miniaturization of the sander 100, the height of the sander 100 is getting lower and lower. The constricted portion 104 and the transition portion 105 reduce the need for holding, enabling users to obtain a lower holding position when holding the housing top 102, thus holding the sander 100 firmly. At the same time, the lighting requirement of the sander 100 is gradually emerging. The sander 100 of the present application is provided with a lighting device 70 to meet the use requirements in insufficient light.

[0103] The lighting device 70 includes a light-emitting portion 71. The light-emitting portion 71 is provided on the housing 10 and above the constricted portion 104. The bottom plate 21 is within the irradiation range of the light-emitting portion 71. The setting position of the light-emitting portion 71 enables the bottom plate 21 to be within the irradiation range of the light-emitting portion 71. Since the abrasive member on the bottom plate 21 grinds the workpiece to be ground, during operation, the working area is within the irradiation range of the light-emitting portion 71, facilitating the operator's observation and improving the use experience.

[0104] In some embodiments, the light-emitting portion 71 is provided at the junction of the constricted portion 104 and the housing top 102. In this embodiment, the lighting device 70 is located below the main switch assembly 40 and above the constricted portion 104. It can be understood that the light-emitting portion 71 emits light downward or obliquely downward to illuminate the area where the bottom plate 21 is located.

[0105] The lighting device 70 is detachably provided relative to the housing 10, facilitating maintenance. The light-emitting portion 71 and the housing 10 can be connected by screws, snap connection, or magnetic attraction.

[0106] In one embodiment, the overall height of the sander 100 is less than or equal to 130 mm. In one embodiment, the overall height of the sander 100 is less than or equal to 120 mm. In one embodiment, the overall height of the sander 100 is less than or equal to 110 mm. In one embodiment, the overall height of the sander 100 is less than or equal to 100 mm. In some embodiments, the overall height of the sander 100 may be 98 mm, 103 mm, 105 mm, 108 mm, 112 mm, etc. The overall height of the sander 100 here refers to the distance between the topmost part of the housing top 102 and the bottommost part of the bottom plate 21, excluding the distance that the battery pack protrudes from the housing top 102. With such a setting, for the sander 100 with a relatively short height, when the lighting device 70 is arranged at the transition part 105, there is a greater spatial advantage.

[0107] In some embodiments, the battery pack of the sander 100 supplies power to the lighting device 70. In some embodiments, the sander 100 further includes a lighting power source, which supplies power to the lighting device 70, and the lighting power source is a power supply component independent of the battery pack. Optionally, the lighting power source can be set as a battery, a storage battery, etc. that is detachably connected to the sander 100. In some embodiments, the sander 100 further includes a self-power generation module, and the self-power generation module is a component that can generate electricity by sunlight. The module that generates electricity by sunlight is an existing component, so its working principle and detailed structure will not be introduced in detail here.

[0108] The light-emitting part 71 is one or a combination of at least two of a point light source, a surface light source, and an LED light source. The light-emitting part 71 can be arranged in a ring shape or a rectangular shape to increase the light-emitting area.

[0109] One light-emitting part 71 can be provided, or multiple light-emitting parts 71 can be provided. When multiple light-emitting parts 71 are provided, each light-emitting part 71 can be located at different positions, and each light-emitting part 71 can be turned on or off simultaneously, or can be independently turned on or off. In some embodiments, the lighting device 70 includes at least two light-emitting parts 71. At least two light-emitting parts 71 can be turned on separately. Optionally, one of the light-emitting parts 71 can be set to a low-beam mode, and one light-emitting part 71 can be set to a high-beam mode, so as to meet different usage requirements. Of course, the two light-emitting parts 71 can also be turned on simultaneously, so that the lighting device 70 has higher intensity and a larger irradiation range. It should be noted that the low-beam mode and the high-beam mode are collectively referred to as the light-emitting modes of the light-emitting part 71. Optionally, different light-emitting parts 71 can be arranged at different positions of the sander 100, so that when the lighting device 70 illuminates the bottom plate 21 of the sander 100, it can also illuminate the front, side, and rear of the sander 100, thus preventing the user from bumping due to unclear surrounding environment.

[0110] The lighting device 70 can be turned on when the motor 31 is started, and the lighting device 70 can be turned off after a preset time when the motor 31 stops rotating. By linking the lighting device 70 with the motor 31, the intelligent turn-on and turn-off of the lighting device 70 are realized, improving the user experience. Optionally, the preset time can be 3s, 5s, 7s, etc., and no specific limitation is made here. In some embodiments, the user can set the lighting device 70 to select an appropriate preset time.

[0111] The light-emitting part 71 can emit light of at least two colors. Optionally, the light-emitting part 71 can emit white light, which has better brightness and is suitable for use in normal weather. The light-emitting part 71 can emit yellow light, which has stronger penetrability and is more suitable for use in foggy weather. Optionally, the light-emitting part 71 can emit red light. When working in a complex construction condition, turning on the red light can play a warning role to the outside world. In other embodiments, the colors emitted by the light-emitting part 71 are not limited to the above colors. Optionally, the lighting device 70 can include at least two light-emitting parts 71, and each light-emitting part 71 emits light of one color correspondingly.

[0112] In some embodiments, the lighting device 70 is configured to be able to adjust the light color of the light-emitting part 71 according to the ambient brightness. The lighting device 70 can be provided with a light-sensing device. When the ambient brightness drops to a first threshold and is recognized by the light-sensing device, the light-emitting part 71 switches from the first color to the second color.

[0113] The lighting device 70 is configured to be able to adjust the brightness of the light-emitting part 71 according to the ambient brightness. In some embodiments, the lighting device 70 can be provided with a light-sensing device. When the ambient brightness drops to a first threshold and is recognized by the light-sensing device, the light-emitting part 71 automatically lights up. In some embodiments, when the ambient brightness rises to a second threshold and is recognized by the light-sensing device, the brightness of the light-emitting part 71 is automatically adjusted to become dimmer.

[0114] In some embodiments, the light-emitting part 71 has at least two brightness levels. When the user presses the button for the first time, the light-emitting part 71 emits light of the first brightness level. When the user presses the button for the second time, the light-emitting part 71 emits light of the second brightness level. When the user presses the button for the third time, the light-emitting part 71 turns off.

[0115] The lighting device 70 can perform at least one of safety indication, fault indication, battery pack power reminder, or projection of an image. Optionally, the light-emitting part 71 can flash at different frequencies and respectively indicate safety indication, fault indication, and power reminder with different flashing frequencies. It can be understood that the light-emitting part 71 can also indicate safety indication, fault indication, and power reminder with different colors of light emitted respectively. Optionally, the light-emitting part 71 can also project an image, which can be the brand logo, model, etc. of the product, thus being able to play a certain publicity effect.

[0116] The lighting device 70 further includes a switch assembly, which is capable of: turning on and off the light-emitting part 71, and / or adjusting the brightness of the light-emitting part 71, and / or selecting the light-emitting color of the light-emitting part 71, and / or triggering the light-emitting part 71 to project, and / or selecting the light-emitting mode of the light-emitting part 71. In one embodiment, the maximum distance between the switch assembly and the light-emitting part 71 is less than or equal to 5 cm, so that the length of the cable connecting the switch assembly and the light-emitting part 71 can be shortened, and thus the cables inside the sander 100 can be arranged neatly and are not easily damaged. The switch assembly can be located above the holding part 11 for easy operation.

[0117] In some embodiments, the lighting device 70 is configured to be able to transmit control signals to and from a user terminal to adjust the light-emitting parameters of the light-emitting part 71. Specifically, the lighting device 70 further includes a communication module. The user can communicate with the communication module through a terminal device such as a mobile phone to control the light-emitting part 71. Optionally, the communication module can be a Bluetooth module, a Wi-Fi module, etc. The light-emitting parameters include but are not limited to turning on and off the light-emitting part 71, adjusting the brightness of the light-emitting part 71, selecting the light-emitting color of the light-emitting part 71, triggering the light-emitting part 71 to project, selecting the light-emitting mode of the light-emitting part 71, adjusting the stroboscopic frequency of the light-emitting part 71, etc. The user terminal can be a portable terminal such as a tablet or a mobile phone to facilitate adjusting the light-emitting parameters of the light-emitting part 71.

[0118] In Figure 19 and Figure 20 In the disclosed solution of the lighting device 70, the light-emitting part 71 can protrude from the outer surface of the housing 10, or can be embedded inside the housing 10 so as to be substantially flush with the outer surface of the housing 10, or can be slightly lower than the outer surface of the housing 10, which is not limited herein.

[0119] As Figure 21 shown, when the sander 100 includes a dust collection device 51, the lighting device 70 can include a light-emitting part 71, and the light-emitting part 71 is arranged on the dust collection device 51, making full use of the space of the dust collection device 51. Since the outer peripheral surface size of the dust collection device 51 is relatively large, arranging the light-emitting part 71 on the dust collection device 51 is less likely to be blocked. The specific structure of the dust collection device 51 can refer to the relevant content of the above-mentioned dust collection device 51. The specific structure of the light-emitting part 71 can refer to the relevant content of the above-mentioned light-emitting part 71.

[0120] In some embodiments, the light-emitting part 71 is arranged circumferentially around the dust collection device 51, so that the light has a large coverage area, increasing the irradiation range and ensuring light uniformity.

[0121] In some embodiments, the light-emitting part 71 is disposed inside and / or outside the dust collection device 51. The light-emitting part 71 can be disposed on the outer peripheral surface of the dust collection device 51, or can be disposed on the inner peripheral surface of the dust collection device 51. Alternatively, the light-emitting part 71 is disposed on both the outer peripheral surface and the inner peripheral surface of the dust collection device 51.

[0122] In some embodiments, part of the light-emitting part 71 is disposed on the dust collection device 51, and part of the light-emitting part 71 is disposed on the housing 10.

[0123] In some embodiments, the dust collection device 51 is detachably connected to the housing 10. The dust collection device 51 has an assembled state assembled to the housing 10. When the dust collection device 51 is in the assembled state, the lighting device 70 is turned on. By linking the dust collection device 51 with the lighting device 70, the intelligent turning on of the lighting device 70 is realized, improving the user experience. The dust collection device 51 has a disassembled state of being detached from the housing 10. In some embodiments, when the dust collection device 51 is in the disassembled state, the lighting device 70 is turned off.

[0124] In some embodiments, the contraction part 104 and the dust collection device 51 can be separately provided with different lighting devices 70, or different light-emitting parts 71.

[0125] The foregoing shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form. Any technical solutions obtained by using equivalent replacements or equivalent transformations fall within the protection scope of the present application.

Claims

1. A sanding machine, comprising: chassis; A base plate assembly, including a base plate, the base plate being connected to a working attachment; A driving assembly, comprising a motor, wherein the motor is used to drive the base plate; It is characterized by further comprising: A dust duct is arranged in the casing, and the dust duct includes a dust inlet and a dust outlet. Dust is collected from the bottom plate and flows into the dust duct through the dust inlet, and then flows into the dust collecting device through the dust outlet. The bottom plate extends in a first plane, and the projection of the dust duct on the first plane is basically arc-shaped. The projection of the dust outlet on the first plane is located within the boundary of the bottom plate.

2. The sanding machine according to claim 1, characterized in that: A height difference H1 between the dust outlet and the dust inlet in the vertical direction is greater than or equal to 9 mm and less than or equal to 41 mm.

3. The sanding machine according to claim 1, characterized in that: An angle formed by a line connecting the dust inlet to the center point of the bottom plate and a line connecting the dust outlet to the center point of the bottom plate is a first angle α, and the first angle α is greater than or equal to 60 degrees and less than or equal to 120 degrees.

4. The sanding machine according to claim 1, characterized in that: The projection of the dust channel on the first plane is a first projection, and the first projection is completely located within the boundary of the bottom plate.

5. The sanding machine according to claim 1, characterized in that: The projection of the dust collecting device on the first plane is a second projection, and the second projection is completely located within the boundary of the bottom plate.

6. The sanding machine according to claim 1, characterized in that: The dust duct extends in a spiral shape between the dust inlet and the dust outlet.

7. The sanding machine according to claim 1, characterized in that: The dust collecting device has an air inlet, which is connected to the dust outlet, and the area of ​​the air inlet is less than or equal to 400 square millimeters.

8. The sanding machine according to claim 1, characterized in that: The dust collecting device has a dust collecting chamber and an air inlet and an air outlet connected to the dust collecting chamber. In the vertical direction, the bottom edge of the air inlet is higher than the bottom surface of the dust collecting chamber and the height difference H2 between the two is greater than or equal to 5 mm and less than or equal to 20 mm.

9. The sanding machine according to claim 1, characterized in that: The dust collecting device comprises a dust collecting cavity and an air inlet and an air outlet communicated with the dust collecting cavity. The air inlet is communicated with the dust outlet, and a filter is arranged at the air outlet.

10. The sanding machine according to claim 9, characterized in that The filter element comprises a bracket and filter paper, the filter paper is mounted on the bracket, and the bracket is detachably connected to the air outlet.

11. The sanding machine according to claim 9, characterized in that: At least two air outlets are provided.

12. The sanding machine according to claim 1, characterized in that The dust collecting device has a dust collecting cavity and an air inlet and an air outlet connected to the dust collecting cavity, the air inlet is connected to the dust outlet, the air outlet is located on a side of the dust collecting device close to the casing, a gap is formed between the dust collecting device and the casing, and the gap connects the air outlet with the outside world.

13. The sanding machine according to claim 1, characterized in that The dust collecting device has a dust collecting cavity, in which a cyclone dust collecting assembly is arranged, and the cyclone dust collecting assembly has an air inlet, a dust exhaust port and an air outlet, the air inlet is connected with the dust outlet, the dust exhaust port is connected with the dust collecting cavity, and the air outlet is connected with the outside.

14. The sanding machine according to claim 1, characterized in that The dust collecting device can be detachably mounted to the casing.

15. The sanding machine according to claim 14, characterized in that The housing comprises a mounting plate, the mounting plate has a mounting surface, the dust collecting device is detachably connected to the mounting surface, and the mounting surface is a mirror-treated surface.

16. The sanding machine according to claim 1, characterized in that The dust collecting device is provided with a first electrostatic conduction component, and the first electrostatic conduction component is used to conduct static electricity from the dust collecting device.

17. The sanding machine according to claim 1, characterized in that It also includes a second electrostatic conduction component, which includes a first conductive part and a second conductive part, wherein two ends of the first conductive part are respectively connected to the dust duct and the stator core of the motor, and two ends of the second conductive part are respectively connected to the stator core and the casing.

Images