Dust guide device, saw blade cover assembly and cutting tool

Abstract

The utility model provides a dust guide device, a saw blade cover assembly and a cutting tool. The dust guide device comprises a dust guide cover and a dust guide plate; the first end of the dust guide cover is hinged to the first connecting end of the dust guide plate, and an opening is formed in the second end of the dust guide cover; the second connecting end of the dust guide plate is used for being hinged to a saw blade cover. When the dust guide plate swings with the second connecting end as the axis, the dust guide cover can be driven to swing in the opposite direction with the second end of the dust guide cover as the axis, and the orientation of an opening of the dust guide cover is fixed. According to the saw dust collecting device, saw dust can be collected more efficiently, and the environment cleanliness and operation safety are improved.

Description

Technical Field

[0001] This disclosure relates to the field of power tool technology, and in particular to a dust collector, a saw blade cover assembly, and a cutting tool. Background Technology

[0002] A miter saw is a widely used woodworking power tool. Its working principle involves an electric motor driving a saw blade to rotate at high speed via gears, thus quickly cutting various materials. During the cutting process, a lot of sawdust is ejected, which not only pollutes the workplace environment but also has a certain impact on the health of workers. Therefore, miter saws are usually equipped with sawdust collection devices. However, when collecting sawdust, the direction of the sawdust's flight changes with the thickness of the workpiece, resulting in a relatively low sawdust collection rate. Utility Model Content

[0003] This disclosure provides a dust collector, a saw blade cover assembly, and a cutting tool.

[0004] In a first aspect, embodiments of this disclosure provide a dust guide, including a dust guide cover and a dust guide plate; a first end of the dust guide cover is hinged to a first connecting end of the dust guide plate, and a second end of the dust guide cover is provided with an opening; the second connecting end of the dust guide plate is used to be hinged to a saw blade cover; when the dust guide plate swings about the second connecting end as an axis, it can drive the dust guide cover to swing in the opposite direction about the second end of the dust guide cover as an axis, so that the orientation of the opening of the dust guide cover is fixed.

[0005] In some embodiments, the dust guide cover includes a dust guide surface and two side walls, the two side walls being disposed on both sides of the dust guide surface to form a U-shaped structure.

[0006] In some embodiments, at least one of the sidewalls is provided with a first hinge hole at the first end, and the dust guide plate is provided with a second hinge hole at the first connecting end; the hinge shaft passes through the first hinge hole and the second hinge hole, so that the first end of the dust guide cover is hinged to the first connecting end of the dust guide plate.

[0007] In some embodiments, both sidewalls are provided with the first hinge hole at the first end, and the first hinge hole is located near the dust guiding surface; the dust guiding plate is provided with a protrusion at the first connecting end, and the second hinge hole passes through the protrusion; the protrusion is disposed between the two sidewalls, and the hinge shaft passes through the two first hinge holes and the second hinge hole.

[0008] In some embodiments, the dust guide plate includes a first planar portion, a second planar portion, and a connecting portion; the first planar portion and the second planar portion are disposed at both ends of the connecting portion and form a stepped structure; the protrusion is disposed at the end of the first planar portion away from the second planar portion.

[0009] In some embodiments, the second end of the dust guide cover is further provided with a guide member; the guide member is used to guide the second end of the dust guide cover to make linear movement so that the orientation of the opening of the dust guide cover is fixed.

[0010] In some embodiments, the guide includes a guide wheel mounted on one of the sidewalls of the dust hood, away from the other sidewall; or the guide includes a guide shaft mounted on one of the sidewalls of the dust hood, away from the other sidewall.

[0011] In some embodiments, the second connecting end is provided with a connecting structure for hinged connection with the saw blade cover.

[0012] In some embodiments, the connection structure includes a connection hole; the connection hole is fitted onto the outer peripheral surface of the saw blade shaft mounting hole on the saw blade cover, so that the second connection end of the dust guide plate is hinged to the saw blade cover.

[0013] Secondly, this disclosure also provides a saw blade cover assembly, which includes a saw blade cover with a dust outlet. The saw blade cover assembly further includes the dust guide described in the first aspect of this disclosure. The second connecting end of the dust guide plate of the dust guide is hinged to the saw blade cover. When the dust guide plate swings relative to the saw blade cover about the second connecting end, it can drive the dust guide cover of the dust guide to swing in the opposite direction about the second end of the dust guide cover. The opening of the second end of the dust guide cover faces the dust outlet.

[0014] In some embodiments, the second end of the dust guide hood is further provided with a guide member; the saw blade cover is further provided with a guide structure; the guide member cooperates with the guide structure to guide the second end of the dust guide hood to make linear movement, so that the opening of the dust guide hood faces the dust outlet.

[0015] In some embodiments, the guiding structure includes a guide groove extending toward the dust outlet; the guiding member includes a guide wheel; the guide wheel is disposed in the guide groove, and when the dust guide plate swings relative to the saw blade cover about the second connecting end, the guide wheel rolls along the guide groove, guiding the second end of the dust guide cover to move linearly along the extending direction of the guide groove; or the guiding structure includes a guide channel extending toward the dust outlet; the guiding member includes a guide shaft; the guide shaft passes through the guide channel, and when the dust guide plate swings relative to the saw blade cover about the second connecting end, the guide shaft moves along the guide channel in the guide channel, guiding the second end of the dust guide cover to move linearly along the extending direction of the guide channel.

[0016] In some embodiments, the second connecting end of the dust guide plate is provided with a connecting structure; the saw blade cover is also provided with a saw blade shaft mounting structure; the connecting structure is hinged to the saw blade shaft mounting structure.

[0017] In some embodiments, the connecting structure includes a connecting hole; the saw blade shaft mounting structure includes a saw blade shaft mounting hole; the connecting hole is sleeved on the outer peripheral surface of the saw blade shaft mounting hole.

[0018] Thirdly, the present disclosure also provides a cutting tool, including a frame, a motor assembly, a saw blade, and a saw blade cover assembly, wherein the saw blade is disposed in the saw blade cover assembly, and the saw blade cover assembly is the saw blade cover assembly described in the second aspect of the present disclosure.

[0019] This disclosure provides a dust guide, a saw blade cover assembly including the dust guide, and a cutting tool using the saw blade cover assembly. The dust guide includes a dust guide cover and a dust guide plate. When the dust guide plate swings about its second connecting end as an axis, it can drive the dust guide cover to swing in the opposite direction about its second end as an axis, so that the opening of the dust guide cover faces the dust outlet of the saw blade cover, thereby allowing the saw dust generated when the cutting tool cuts the workpiece to be discharged from the dust outlet along the dust guiding direction, thus improving the saw dust collection rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the disassembled structure of a dust collector according to an embodiment of this disclosure;

[0021] Figure 2 This disclosure includes the following embodiments. Figure 1 A diagram showing the state of the dust collector's cutting tool when cutting thin workpieces;

[0022] Figure 3 It is a state diagram of a cutting tool, including a related dust collector, used to cut thin workpieces;

[0023] Figure 4 This disclosure includes the following embodiments. Figure 1 A diagram showing the state of the dust collector's cutting tool when cutting thick workpieces;

[0024] Figure 5 It is a state diagram of a cutting tool, including a related dust collector, used to cut thick workpieces. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions of this disclosure will be described in detail below with reference to the accompanying drawings.

[0026] Exemplary embodiments will be described more fully below with reference to the accompanying drawings; however, these exemplary embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0027] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0028] As used herein, the term “and / or” includes any and all combinations of one or more related enumerated entries.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that when the terms “comprising” and / or “made of” are used in this specification, the presence of the stated feature, integral, step, operation, element, and / or component is specified, but the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof is not excluded.

[0030] The embodiments described herein can be described with reference to plan views and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations can be modified according to manufacturing techniques and / or tolerances. Therefore, the embodiments are not limited to those shown in the drawings, but include modifications to configurations formed based on manufacturing processes. Therefore, the areas illustrated in the drawings are schematic in nature, and the shapes of the areas shown in the figures illustrate specific shapes of areas of an element, but are not intended to be limiting.

[0031] Unless otherwise specified, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined herein.

[0032] In this embodiment, the sawdust collection device mainly utilizes the strong wind generated by the high-speed rotation of the saw blade of the miter saw and the splashing characteristics of the sawdust caused by centrifugal force when it is cut off from the workpiece to collect the sawdust. A collection chamber is provided at the rear of the saw blade cover, and a dust outlet is provided at the upper part of the collection chamber. The outlet direction of the dust outlet is consistent with the tangential direction of the saw blade at the corresponding position, so that the cut sawdust can fly out from the dust outlet.

[0033] This disclosure provides a two-section dust collector, including a dust guide plate and a dust guide cover. The dust guide plate and the dust guide cover are hinged at their lower ends, allowing them to rotate relative to each other. This enables the upper end to open and close, ensuring that the dust guiding surface of the dust guide cover always corresponds to the dust outlet regardless of factors such as the thickness of the workpiece. The cutting tool provided in this disclosure can be used to cut both thin and thick workpieces.

[0034] In some related technologies, the dust guide is a single-section type. When affected by factors such as the thickness of the workpiece, the orientation of the dust guide surface will change due to the change in position, thus it cannot always correspond to the dust outlet of the saw blade cover.

[0035] For example, Figure 2 This is a state diagram of a cutting tool, including the dust collector in the embodiments of this disclosure, used to cut a thin workpiece. Figure 3 This is a diagram showing the state of a cutting tool, including a single-stage dust collector, when cutting thin workpieces. Figure 4 This is a state diagram of a cutting tool, including the dust guide in the embodiments of this disclosure, used to cut a thick workpiece. Figure 5 This is a diagram showing the state of a cutting tool, including a single-stage dust collector, when cutting thick workpieces. (Example) Figure 2 , Figure 4 As shown, when the cutting tool provided in this embodiment cuts a workpiece, the saw blade gradually moves downwards with the cutting. Under the action of the workpiece, the dust guide plate rotates clockwise relative to the saw blade. Since the dust guide cover and the dust guide plate are hinged, the clockwise rotation of the dust guide plate will drive the dust guide cover to rotate counterclockwise. Whether cutting thin or thick workpieces, one end of the dust guide cover always faces the dust outlet, that is, the dust guide surface of the dust guide always corresponds to the dust outlet, so that the sawdust can be discharged from the dust outlet more smoothly and efficiently. Figure 3 , Figure 5The image shows a single-stage dust collector. When the cutting tool cuts a workpiece, the saw blade moves downwards as it cuts. Under the action of the workpiece, the single-stage dust collector rotates clockwise relative to the saw blade, changing the orientation of the dust-guiding surface and forming an angle with the dust outlet. When cutting thin workpieces, the clockwise rotation angle of the single-stage dust collector is smaller, and the dust-guiding surface can basically maintain its orientation towards the dust outlet. However, when cutting thick workpieces, the clockwise rotation angle of the single-stage dust collector is larger, resulting in a larger rotation angle. The dust-guiding surface no longer faces the dust outlet, making it difficult for the dust collector to smoothly discharge sawdust from the dust outlet, leading to a significant drop in the dust collection rate.

[0036] like Figure 1 As shown, this embodiment of the present disclosure provides a dust guide, including a dust guide cover 1 and a dust guide plate 2. The first end of the dust guide cover 1 is hinged to the first connecting end of the dust guide plate 2. The second end of the dust guide cover 1 is provided with an opening 10, and the second connecting end of the dust guide plate 2 is hinged to a saw blade cover. The dust guide cover 1 and the dust guide plate 2 can rotate relative to each other. When the dust guide plate 2 swings about the second connecting end as an axis, it can drive the dust guide cover 1 to swing in the opposite direction about the second end of the dust guide cover as an axis, so that the orientation of the opening 10 of the dust guide cover 1 is fixed.

[0037] In this embodiment, the dust guide cover 1 and the dust guide plate 2 are connected by a hinge to achieve relative rotational movement between them. This disclosure does not specifically limit the hinge method. In some embodiments, the dust guide cover 1 and the dust guide plate 2 are hinged together by a hinge shaft 3.

[0038] In some embodiments, the dust guide cover 1 includes a dust guide surface 11 and two side walls 12, which are disposed on both sides of the dust guide surface 11. The dust guide surface 11 is configured as a groove shape with a certain depth, and its bottom and the two side walls 12 are smoothly transitioned to form a U-shaped structure to surround the saw blade 6.

[0039] In this embodiment, the dust-guiding surface 11 of the dust guide hood 1 faces the saw blade 6. During sawing, the sawdust generated by the saw blade 6 cutting the workpiece flies out along the tangential direction of the saw blade 6. The tangential direction of the saw blade 6 is consistent with the extending direction of the dust guide surface 11. Since the extending direction of the dust guide surface 11 corresponds to the dust outlet, the sawdust can be discharged from the dust outlet. The U-shaped structure formed by the dust guide surface 11 and the side wall 12 can effectively collect and limit the splash range of the sawdust, ensuring that the sawdust cut by the saw blade will not fly out from the side, achieving higher efficiency in collecting sawdust, improving environmental cleanliness and operational safety.

[0040] The embodiments disclosed herein do not impose any special limitations on how the dust guide cover 1 and the dust guide plate 2 are hinged.

[0041] In some embodiments, the dust guide cover 1 and the dust guide plate 2 are hinged together by a hinge shaft. In this embodiment, the hinge shaft may be an independent structure from both the dust guide cover 1 and the dust guide plate 2, or it may be an integral structure from either the dust guide cover 1 or the dust guide plate 2.

[0042] In some embodiments, a hinge shaft is provided on one side wall of the dust guide cover 1, and the hinge shaft and the side wall of the dust guide cover 1 are integrally formed; a hinge hole is provided on the dust guide plate 2, and the hinge shaft passes through the hinge hole, thereby hinged the dust guide cover 1 and the dust guide plate 2.

[0043] In some embodiments, a hinge shaft is provided on the dust guide plate 2, and the hinge shaft is integral with the side wall of the dust guide plate 2; a hinge hole is provided on the dust guide cover 1, and the hinge shaft passes through the hinge hole, thereby hinged the dust guide cover 1 and the dust guide plate 2.

[0044] In some embodiments, at least one sidewall 12 is provided with a first hinge hole 13 at a first end of the dust guide cover 1, and the dust guide plate 2 is provided with a second hinge hole 23 at a first connecting end; the hinge shaft 3 passes through the first hinge hole 13 and the second hinge hole 23, so that the first end of the dust guide cover 1 is hinged to the first connecting end of the dust guide plate 2. For example, the first hinge hole 13 is provided on one of the sidewalls 12 of the dust guide cover 1, and the hinge shaft 3 passes through the first hinge hole 13 and the second hinge hole 23, so that the first end of the dust guide cover 1 is hinged to the first connecting end of the dust guide plate 2, thereby allowing relative rotational movement between the dust guide cover 1 and the dust guide plate 2.

[0045] In some embodiments, each of the two sidewalls 12 is provided with a first hinge hole 13 at the first end of the dust guide cover 1, and the first hinge hole 13 is located near the dust guide surface 11. The dust guide plate 2 is provided with a protrusion 230 at the first connecting end, and a second hinge hole 23 passes through the protrusion 230. The protrusion 230 is disposed between the two sidewalls 12, and the hinge shaft 3 passes through the two first hinge holes 13 and the second hinge hole 23, so that the first end of the dust guide cover 1 is hinged to the first connecting end of the dust guide plate 2, thereby allowing relative rotational movement between the dust guide cover 1 and the dust guide plate 2.

[0046] In some embodiments, the dust guide plate 2 includes a first planar portion 21, a second planar portion 22, and a connecting portion 24. The first planar portion 21 and the second planar portion 22 are disposed at both ends of the connecting portion 24 and have a stepped structure. The protrusion 230 is disposed at the end of the first planar portion 21 away from the second planar portion 22.

[0047] In this embodiment, the protrusion 230 is disposed between the two side walls 12, and the dust guide plate 2 is configured as a stepped structure, so that the second flat portion 22 and one side wall 12 of the dust guide cover 1 are on the same plane, which facilitates the installation of the dust guide on the saw blade cover.

[0048] The embodiments disclosed herein do not impose any special limitations on the shapes of the first planar portion 21 and the second planar portion 22. For example, the first planar portion and the second planar portion can be rectangular or trapezoidal.

[0049] This disclosure does not impose any special limitation on the shape of the connecting portion 24. For example, the surface of the connecting portion 24 can be a plane or a curved surface. It should be noted that the surface shape of the connecting portion 24 needs to match the shape of the portion where the first planar portion 21 and the second planar portion 22 are connected.

[0050] In some embodiments, a guide member is also provided at the second end of the dust guide hood 1. The guide member is installed on one of the side walls 12 of the dust guide hood 1, on the side opposite to the other side wall. The guide member guides the second end of the dust guide hood 1 to make linear movement so that the orientation of the opening 10 of the dust guide hood 1 is fixed. For example, when sawing is being done, the saw blade 6 descends to cut the workpiece 7. The dust guide descends with the saw blade 6 until the lower end of the dust guide contacts the upper surface of the workpiece 7. The saw blade 6 continues to descend to cut the workpiece 7. The bottom of the dust guide is pushed upward by the workpiece 7. At this time, the dust guide plate 2 rotates clockwise relative to the hinge shaft 3, while the dust guide hood 1 rotates counterclockwise relative to the hinge shaft 3 under the action of the hinge shaft 3 and the guide member. The guide member guides the dust guide hood 1 to make linear movement so that the extension surface of the dust guide surface 11 of the dust guide hood 1 always faces the dust outlet of the saw blade cover 5.

[0051] The present disclosure does not impose any special limitations on the guide component. For example, the guide component can be a guide shaft or a guide wheel.

[0052] In some embodiments, the guide includes a guide wheel mounted on one sidewall 12 of the dust cover 1, away from the other sidewall 12.

[0053] In some embodiments, the guide includes a guide shaft mounted on one sidewall 12 of the dust cover 1, away from the other sidewall 12.

[0054] In some embodiments, the second connecting end of the dust guide plate 2 is provided with a connecting structure for hinged connection with the saw blade cover.

[0055] This disclosure does not impose any special limitations on the connection structure. As long as the dust guide can be hinged to the saw blade cover, allowing the dust guide to swing or rotate relative to the saw blade cover, it falls within the protection scope of this disclosure. For example, in some embodiments, the connection structure can be a connecting shaft or a connecting hole. In the embodiments of this disclosure, the connection structure is set as a connecting hole 25, which is sleeved on the outer peripheral surface of the saw blade shaft mounting hole 8 on the saw blade cover 5, so that the second connecting end of the dust guide plate 2 is hinged to the saw blade cover 5.

[0056] Figure 2 This disclosure includes the following embodiments. Figure 1A diagram showing the state of the dust collector's cutting tool when it is used to cut a workpiece.

[0057] Reference Figure 2 This disclosure provides a saw blade cover assembly, which includes a saw blade cover 5 and a dust guide. The saw blade cover 5 is provided with a dust outlet 51, and the opening 10 of the second end of the dust guide cover 1 of the dust guide faces the dust outlet 51. The second connecting end of the dust guide plate 2 of the dust guide is hinged to the saw blade cover 5. When the dust guide plate 2 swings relative to the saw blade cover about the second connecting end as an axis, it can drive the dust guide cover 1 to swing in the opposite direction about the second end of the dust guide cover as an axis.

[0058] In this embodiment, the dust guide cover 1 and the dust guide plate 2 are connected by a hinge to achieve relative rotational movement between them. This disclosure does not specifically limit the hinge method. In some embodiments, the dust guide cover 1 and the dust guide plate 2 are hinged together by a hinge shaft 3.

[0059] In some embodiments, the second end of the dust guide hood 1 is further provided with a guide member, and the saw blade cover 5 is further provided with a guide structure. The guide member cooperates with the guide structure to guide the second end of the dust guide hood 1 to make linear movement, so that the opening 10 of the dust guide hood 1 faces the dust outlet 51.

[0060] This disclosure does not impose any special limitations on the guide member and the guide structure. In some embodiments, the guide member may be a guide shaft or a guide wheel, and the guide structure may be a guide groove or a guide through groove.

[0061] In some embodiments, the guide member is a guide wheel 4, and the guide structure is a guide groove 52. The guide groove 52 extends towards the dust outlet 51. The guide wheel 4 is disposed in the guide groove 52. When the dust guide plate 2 swings relative to the saw blade cover 5 about the second connecting end as an axis, the guide wheel 4 rolls along the guide groove 52, guiding the second end of the dust guide cover 1 to move linearly along the guide groove 52. For example, when sawing is in progress, the saw blade 6 descends to cut the workpiece 7. The dust guide descends with the saw blade 6 until the lower end of the dust guide contacts the upper surface of the workpiece 7. The saw blade 6 continues to descend to cut the workpiece 7. The bottom of the dust guide is pushed upward by the workpiece 7. At this time, the dust guide plate rotates clockwise relative to the hinge axis, while the dust guide cover 1 rotates counterclockwise relative to the hinge axis 3 under the action of the hinge axis 3 and the guide wheel 4. The guide wheel 4 rolls along the guide groove 52, guiding the second end of the dust guide cover 1 to move linearly along the guide groove 52, so that the extension surface of the dust guide surface 11 of the dust guide cover 1 always faces the dust outlet of the saw blade cover 5.

[0062] In some embodiments, the guiding structure is a guide groove, the extension direction of which faces the dust outlet; the guide member is a guide shaft; the guide shaft passes through the guide groove, and when the dust guide plate swings relative to the saw blade cover with the second connecting end as the axis, the guide shaft moves along the guide groove in the guide groove, and the second end of the dust guide cover moves linearly along the extension direction of the guide groove.

[0063] In some embodiments, the second connecting end of the dust guide plate 2 is provided with a connecting structure, and the saw blade cover 5 is also provided with a saw blade shaft mounting structure, the connecting structure being hinged to the saw blade shaft mounting structure.

[0064] This disclosure does not impose any special limitations on the connecting structure and the saw blade shaft mounting structure. For example, in some embodiments, the connecting structure can be a connecting shaft or a connecting hole, and the saw blade shaft mounting structure can be a saw blade shaft mounting shaft or a saw blade shaft mounting hole. In the embodiments of this disclosure, the connecting structure is set as a connecting hole 25, and the saw blade shaft mounting structure is set as a saw blade shaft mounting hole 8. The connecting hole 25 is fitted onto the outer peripheral surface of the saw blade shaft mounting hole 8, so that the second connecting end of the dust guide plate 2 is hinged to the saw blade cover 5.

[0065] This disclosure also provides a cutting tool, including a frame, a motor assembly, a saw blade, and the aforementioned saw blade cover assembly, wherein the saw blade is disposed in the saw blade cover assembly.

[0066] To enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of this disclosure, the technical solutions provided by the embodiments of this disclosure will be described in detail below through specific embodiments:

[0067] Example 1

[0068] This embodiment explains the working principle of the dust collector when cutting thin workpieces with a cutting tool.

[0069] Figure 2 This disclosure includes the following embodiments. Figure 1 A diagram showing the state of the dust collector's cutting tool when cutting thin workpieces. Figure 3 This is a diagram showing the state of a cutting tool, including a single-stage dust collector, used for cutting thin workpieces.

[0070] like Figure 2 As shown, when the workpiece 7 is thin, the dust guide is hinged to the saw blade cover 5 via the dust guide plate 2, with the hinge axis coaxial with the saw blade shaft 9. Under the action of gravity, external elastic force (not shown), and the limiting block (not shown) on the saw blade cover, the initial position of the dust guide is at the lowest position that the dust guide can reach. At this time, the guide wheel 4 is located at the lowest end of the guide groove 52, and the dust guide surface 11 of the dust guide cover 1 is in contact with the edge surface of the first connecting end of the dust guide plate 2. When the sawing work begins, the second connecting end of the dust guide plate 2 descends along with the saw blade 6 and the saw blade cover 5 under the drive of the saw blade shaft 9. Since the thickness of the thin workpiece is very small, the saw blade 6 has already penetrated the thin workpiece before the lower surface of the dust guide plate 2 has even touched or only touched a small part of the upper surface of the workpiece 7. There is no need for the saw blade 6 to continue cutting. Therefore, the dust guide surface 11 of the dust guide cover 1 always faces the dust outlet 51, which can discharge sawdust from the dust outlet 51.

[0071] like Figure 3 As shown, when cutting thin workpieces, the dust guide surface of the cutting tool containing the one-piece dust guide can be aligned with the dust outlet to achieve the purpose of discharging sawdust from the dust outlet.

[0072] Example 2

[0073] This embodiment explains the working principle of the dust collector when cutting thick workpieces with a cutting tool.

[0074] Figure 4 This disclosure includes the following embodiments. Figure 1 A diagram showing the state of the dust collector's cutting tool when cutting thick workpieces. Figure 5 This is a diagram showing the state of a cutting tool, including a single-stage dust collector, when cutting thick workpieces. (Example) Figure 4 As shown, when workpiece 7 is a thick workpiece, the dust guide is hinged to the saw blade cover 5 via the dust guide plate 2, and the hinge axis is coaxial with the saw blade shaft 9. Under the action of gravity, external elastic force (not shown), and the limiting block (not shown) on the saw blade cover, the initial position of the dust guide is at the lowest position that the dust guide can reach (e.g., Figure 2 At this time, the guide wheel 4 is located at the lowest position of the guide groove 52, and the dust guiding surface 11 of the dust guide cover 1 is in contact with the edge surface of the first connecting end of the dust guide plate 2. When the sawing work begins, the second connecting end of the dust guide plate 2, driven by the saw blade shaft 9, descends together with the saw blade 6 and the saw blade cover 5. When it descends to the point where the lower surface of the dust guide plate 2 contacts the upper surface of the workpiece 7, the dust guiding surface 11 of the dust guide cover 1, the two side walls 12 of the dust guide cover 1, the side of the dust guide plate 2 facing the saw blade 6, and the upper surface of the workpiece 7 form a cover with an open top, covering the saw blade 6 inside the cover, so that the saw dust that flies out along the tangent direction of the saw blade 6 during cutting is discharged from the dust outlet 51 from the opening of the cover along the direction of the dust guiding surface 11.

[0075] As the saw blade 6 continues to descend and cut into the workpiece 7, the bottom of the dust guide is pushed upwards by the workpiece 7. At this time, the dust guide plate 2 rotates clockwise relative to the saw blade shaft 9, as indicated by arrow B in the diagram. Under the action of the guide wheel 4, the dust guide hood 1 moves upwards along the extension direction of the guide groove 52 and rotates relative to the dust guide plate 2 under the action of the hinge shaft 3. At this time, the dust guide hood 1 rotates counterclockwise relative to the hinge shaft. The guide wheel 4 rolls along the guide groove 52, guiding the second end of the dust guide hood 1 to move linearly along the guide groove 52, so that the extension surface of the dust guide surface 11 of the dust guide hood is always facing the dust outlet 51 of the saw blade cover 5. Arrow A in the diagram indicates the direction in which sawdust flies out.

[0076] like Figure 5As shown, when cutting thick workpieces, the cutting tool containing a one-piece dust guide forms a large angle between the dust guide surface and the dust outlet when cutting the workpiece, making it difficult for the dust guide to smoothly discharge sawdust from the dust outlet.

[0077] The dust collector disclosed herein has excellent dust collection effect on workpieces of various thicknesses within its cutting capacity range, and can efficiently collect sawdust with a stable dust collection rate.

[0078] Example embodiments have been disclosed herein, and while specific terminology has been used, it is for illustrative purposes only and should be construed as such, and is not intended to be limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in connection with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in connection with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as set forth by the appended claims.

Claims

1. A dust collector, characterized in that, The dust guide includes a dust guide cover and a dust guide plate; The first end of the dust guide cover is hinged to the first connecting end of the dust guide plate, and the second end of the dust guide cover is provided with an opening; the second connecting end of the dust guide plate is used to hinge with the saw blade cover. When the dust guide plate swings about the second connecting end as an axis, it can drive the dust guide cover to swing in the opposite direction about the second end of the dust guide cover as an axis, so that the opening of the dust guide cover is fixed.

2. The dust collector according to claim 1, characterized in that, The dust guide cover includes a dust guide surface and two side walls, which are arranged on both sides of the dust guide surface to form a U-shaped structure.

3. The dust collector according to claim 2, characterized in that, At least one of the sidewalls is provided with a first hinge hole at the first end, and the dust guide plate is provided with a second hinge hole at the first connecting end; the hinge shaft passes through the first hinge hole and the second hinge hole, so that the first end of the dust guide cover is hinged to the first connecting end of the dust guide plate.

4. The dust collector according to claim 3, characterized in that, Both sidewalls are provided with the first hinge hole at the first end, and the first hinge hole is located near the dust guiding surface; The dust guide plate has a protrusion at the first connecting end, and the second hinge hole passes through the protrusion; the protrusion is disposed between the two side walls, and the hinge shaft passes through the two first hinge holes and the second hinge hole.

5. The dust collector according to claim 4, characterized in that, The dust guide plate includes a first planar portion, a second planar portion, and a connecting portion; the first planar portion and the second planar portion are disposed at both ends of the connecting portion, forming a stepped structure; the protrusion is disposed at the end of the first planar portion away from the second planar portion.

6. The dust collector according to any one of claims 2 to 5, characterized in that, The second end of the dust guide cover is also provided with a guide component; The guide member is used to guide the second end of the dust cover to make linear movement so that the orientation of the opening of the dust cover is fixed.

7. The dust collector according to claim 6, characterized in that, The guide includes a guide wheel, which is mounted on one of the side walls of the dust hood, facing away from the other side wall; or The guide includes a guide shaft mounted on one of the sidewalls of the dust cover, facing away from the other sidewall.

8. The dust collector according to any one of claims 1 to 5, characterized in that, The second connecting end is provided with a connecting structure, which is used to hinge with the saw blade cover.

9. The dust collector according to claim 8, characterized in that, The connection structure includes a connection hole; the connection hole is fitted onto the outer circumferential surface of the saw blade shaft mounting hole on the saw blade cover, so that the second connection end of the dust guide plate is hinged to the saw blade cover.

10. A saw blade cover assembly, the saw blade cover assembly including a saw blade cover, the saw blade cover being provided with a dust outlet, characterized in that, The saw blade cover assembly further includes a dust guide according to any one of claims 1 to 9; The second connecting end of the dust guide plate of the dust guide device is hinged to the saw blade cover. When the dust guide plate swings relative to the saw blade cover with the second connecting end as the axis, it can drive the dust guide cover of the dust guide device to swing in the opposite direction with the second end of the dust guide cover as the axis. The opening at the second end of the dust guide cover faces the dust outlet.

11. The saw blade cover assembly according to claim 10, characterized in that, The second end of the dust guide cover is also provided with a guide component; the saw blade cover is also provided with a guide structure; The guide member cooperates with the guide structure to guide the second end of the dust guide cover to move linearly, so that the opening of the dust guide cover faces the dust outlet.

12. The saw blade cover assembly according to claim 11, characterized in that, The guiding structure includes a guide groove extending towards the dust outlet; the guiding component includes a guide wheel; the guide wheel is disposed in the guide groove, and when the dust guide plate swings relative to the saw blade cover about the second connecting end as an axis, the guide wheel rolls along the guide groove, guiding the second end of the dust guide cover to move linearly along the extending direction of the guide groove; or The guiding structure includes a guide groove extending toward the dust outlet; the guide member includes a guide shaft; the guide shaft passes through the guide groove, and when the dust guide plate swings relative to the saw blade cover with the second connecting end as the axis, the guide shaft moves along the guide groove in the guide groove, guiding the second end of the dust guide cover to move linearly along the extension direction of the guide groove.

13. The saw blade cover assembly according to any one of claims 10 to 12, characterized in that, The dust guide plate has a connecting structure at its second connecting end; the saw blade cover also has a saw blade shaft mounting structure; the connecting structure is hinged to the saw blade shaft mounting structure.

14. The saw blade cover assembly according to claim 13, characterized in that, The connecting structure includes a connecting hole; the saw blade shaft mounting structure includes a saw blade shaft mounting hole; the connecting hole is sleeved on the outer circumferential surface of the saw blade shaft mounting hole.

15. A cutting tool, comprising a frame, a motor assembly, a saw blade, and a saw blade cover assembly, wherein the saw blade is disposed in the saw blade cover assembly, characterized in that, The saw blade cover assembly is the saw blade cover assembly according to any one of claims 10 to 14.

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