Polishing tool

Abstract

The utility model discloses a polishing tool which comprises a shell, a driving assembly and a fan assembly, and a dust outlet is formed in the shell; the driving assembly is at least partially located in the shell; the fan assembly is located in the shell, the driving assembly drives the fan assembly to rotate with a first axis as the axis, a guide part detachably connected with the shell is arranged on the periphery of the fan assembly, a notch is formed in the position, corresponding to the dust outlet, of the guide part, and a guide channel is defined between the guide part and the fan assembly. The width of the guide channel is gradually increased in the preset rotation direction of the fan assembly, the guide part is arranged on the periphery of the fan assembly, the guide channel for dust discharge is formed, and the guide channel is gradually increased in the preset rotation direction of the fan assembly, so that the dust discharge air volume near the dust outlet can be increased, and dust can be rapidly discharged; dust is prevented from being accumulated near the dust outlet, and the dust discharging effect of the polishing tool is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power tools, in particular to a polishing tool. BACKGROUND

[0002] The polishing tool is an electric power tool used for polishing work, which is often used for polishing uneven or uneven-thickness wall surface, table surface, etc. to obtain a target smoothness surface.

[0003] The polishing tool generates dust during polishing work, which can be sucked into the shell of the polishing tool and affect the working efficiency of the polishing tool. SUMMARY

[0004] To overcome the above-mentioned shortcomings, the purpose of the present application is to provide a polishing tool to improve the dust removal effect of the polishing tool.

[0005] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0006] The present application provides a polishing tool, which comprises:

[0007] A shell, wherein an exhaust port is arranged on the shell;

[0008] A driving assembly, at least partially located in the shell;

[0009] A fan assembly located in the shell, wherein the driving assembly drives the fan assembly to rotate around a first axis, the outer periphery of the fan assembly is provided with a guide portion which is detachably connected with the shell, the guide portion is provided with a gap corresponding to the exhaust port, and a guide channel is formed between the guide portion and the fan assembly, the width of the guide channel gradually increases along the preset rotation direction of the fan assembly.

[0010] In an embodiment, the fan assembly comprises:

[0011] A mounting disc sleeved on the output shaft of the driving assembly, wherein the mounting disc has oppositely arranged first and second surfaces in the extension direction of the first axis;

[0012] A heat dissipation fan uniformly arranged on the first surface of the mounting disc along the circumferential direction of the mounting disc;

[0013] A dust collection fan uniformly arranged on the second surface of the mounting disc along the circumferential direction of the mounting disc.

[0014] In an embodiment, the fan assembly comprises a plastic fan assembly.

[0015] In an embodiment, the inner side of the shell is provided with a bearing space corresponding to the outer periphery of the dust collecting fan, and at least two partition openings are arranged in the bearing space,

[0016] The guide part comprises a main body part and at least two connecting parts arranged on the main body part and extending along the radial direction of the main body part, the main body part of the guide part is arranged in the bearing space, and the connecting parts of the guide part are clamped in the corresponding partition openings.

[0017] In an embodiment, the thickness of the main body part gradually decreases along the preset rotation direction of the fan assembly.

[0018] In an embodiment, further comprising

[0019] A counterweight assembly connected to the driving assembly and arranged on the side of the dust collecting fan away from the heat dissipation fan;

[0020] The counterweight assembly comprises an eccentric shaft sleeved on the output shaft of the driving assembly and a connecting block sleeved on the eccentric shaft, and the outer periphery of the connecting block is provided with a fan-shaped or semicircular counterweight block.

[0021] In an embodiment, further comprising a bottom plate assembly connected to the counterweight assembly, the driving assembly drives the eccentric swing of the bottom plate assembly through the counterweight assembly, and the bottom plate assembly comprises a bottom plate and a polishing member fixed to the bottom plate.

[0022] In an embodiment, further comprising a receiving assembly arranged between the bottom plate assembly and the counterweight assembly.

[0023] The receiving assembly comprises a first bearing and a bearing seat, the inner ring of the first bearing is sleeved on the eccentric shaft, and the bearing seat is sleeved on the outer ring of the first bearing and fixedly connected to the bottom plate.

[0024] In an embodiment, further comprising an adapter, the adapter has two first and second ends in communication with each other, the first end of the adapter is detachably connected to the dust outlet of the shell;

[0025] The outer periphery of the dust outlet of the shell is provided with at least two radially extending protrusions, the first end of the adapter is provided with a locking buckle, and when the adapter is docked with the dust outlet, the locking buckle is overlapped with the corresponding protrusion to realize locking.

[0026] In an embodiment, the second end of the adapter includes a first through hole and a second through hole in communication with each other, the first through hole is located on a side of the second through hole away from the first end of the adapter, the first through hole has a first aperture, the second through hole has a second aperture, the first aperture is larger than the second aperture Advantages

[0027] The present application sets a guide part on the outer periphery of the fan assembly and forms a dust removal guide channel, and the guide channel gradually increases along the preset rotation direction of the fan assembly, which is beneficial to improve the dust removal air volume near the dust outlet, quickly remove dust, avoid dust accumulation near the dust outlet, and improve the dust removal effect of the polishing tool.

[0028] By setting the adapter, it can be compatible with different sizes of dust collection boxes, improving its versatility. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings are included to provide a further understanding of the technical solutions of the present disclosure, and constitute a part of the specification, and are used together with the embodiments of the present disclosure to explain the technical solutions of the present disclosure, and do not constitute a limitation on the technical solutions of the present disclosure. The shapes and sizes of the components in the drawings do not reflect the true proportions, and the purpose is only to schematically illustrate the content of the present application.

[0030] Figure 1 A polishing tool structure schematic diagram provided for the embodiments of the present application;

[0031] Figure 2 A polishing tool partial cross-sectional schematic diagram provided for the embodiments of the present application;

[0032] Figure 3 A polishing tool partial internal structure schematic diagram provided for the embodiments of the present application;

[0033] Figure 4 A shell internal structure schematic diagram provided for the embodiments of the present application;

[0034] Figure 5 A top view of the fan assembly and the guide part provided for the embodiments of the present application;

[0035] Figure 6 A structure schematic diagram of the fan assembly and the guide part provided for the embodiments of the present application;

[0036] Figure 7 A structure schematic diagram of the polishing tool provided for the embodiments of the present application;

[0037] Figure 8 A structure schematic diagram of the adapter provided for the embodiments of the present application;

[0038] Figure 9 A cross-sectional schematic diagram of the adapter provided for the embodiments of the present application. DETAILED DESCRIPTION

[0039] The above-mentioned scheme will be further described in connection with the following specific examples. It should be understood that these examples are used to illustrate the present application and are not intended to limit the scope of the present application. The implementation conditions used in the examples can be further adjusted as the specific manufacturer's conditions, and the implementation conditions not noted are usually the conditions in the conventional experiments.

[0040] Unless otherwise defined, technical terms or scientific terms used in the embodiments of the present disclosure shall have the ordinary meaning used by a person skilled in the art to which the present application pertains. The terms "first", "second", and similar terms used in the embodiments of the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "comprise", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "linked" or similar terms do not mean that the physical or mechanical connection is necessary, but can include electrical connection, whether direct or indirect. In this document, "electrically connected" includes the case where the constituent elements are connected together through an element having a certain electrical effect. The element having a certain electrical effect is not particularly limited as long as it can perform the transmission of electrical signals between the constituent elements to be connected. The element having a certain electrical effect may, for example, be an electrode or a wiring, or a switching element such as a transistor, or other functional elements such as a resistor, an inductor, or a capacitor, etc. "Up", "down", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0041] In the present application, the orientation or positional relationship indicated by the terms "up", "down", "inner", "middle", and the like is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements, or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0042] The following will be described in connection with Figures 1-9To describe the polishing tool provided by the embodiments of the application, the polishing tool comprises a shell 10, a driving assembly 20 and a fan assembly 30, the shell 10 is provided with a dust outlet 13; at least part of the driving assembly 20 is located in the shell 10, the fan assembly 30 is located in the shell 10, the driving assembly 20 drives the fan assembly 30 to rotate around a first axis f, the outer periphery of the fan assembly 30 is provided with a guide portion 34 which is detachably connected with the shell 10, the guide portion 34 is provided with a gap 343 corresponding to the dust outlet 13, a guide channel 35 is formed between the guide portion 34 and the fan assembly 30, the width d of the guide channel 35 gradually increases along the preset rotation direction of the fan assembly 30. By providing the guide portion on the outer periphery of the fan assembly and forming the dust removal guide channel, and the width of the guide channel gradually increases along the preset rotation direction of the fan assembly, it is beneficial to improve the dust removal air volume near the dust outlet, to quickly remove dust and debris, to avoid dust and debris accumulation near the dust outlet, and to improve the dust removal effect of the polishing tool. The polishing tool is a sander.

[0043] The shell 10 described above is the outer shape part of the polishing tool, and the shell 10 is at least formed with a handle portion 11 and a containing portion 12. The handle portion 11 is used for a user to hold, one end of the handle portion 11 is connected with the containing portion 12, and the other end can be used to connect an external power cable, or can be a connecting seat formed for mounting a portable direct-current power supply such as a battery pack, the containing portion 12 is internally formed with a containing cavity, at least part of the driving assembly 20 and the fan assembly 30 are arranged in the containing cavity, and the containing portion 12 covers at least part of the bottom plate assembly 40.

[0044] The driving assembly 20 comprises a motor 21, the motor 21 is used as a prime mover of the polishing tool and is arranged in the shell 10, the motor 21 comprises a motor shaft 22 for transmitting power to the fan assembly 30 and the bottom plate assembly 40, the motor shaft 22 can also be referred to as an output shaft of the driving assembly 20, and the motor shaft 22 rotates around a first axis f which basically extends in the up-down direction.

[0045] Reference Figures 5-6In an embodiment, the fan assembly 30 is sleeved on the output shaft of the driving assembly 20 (i.e. the motor shaft 22 of the motor 21), when the motor 21 rotates, the motor shaft 22 transmits power to the fan assembly 30, thereby driving the fan assembly 30 to rotate. Further, the fan assembly 30 comprises a mounting disc 31, a heat dissipation fan 32 and a dust collection fan 33, wherein the mounting disc 31 is sleeved on the output shaft of the driving assembly 20, and the mounting disc 31 has oppositely arranged first and second surfaces 311 and 312 in the extension direction (Z direction) of the first axis f; the heat dissipation fan 32 is uniformly arranged on the first surface 311 of the mounting disc 31 along the circumferential direction of the mounting disc 31; and the dust collection fan 33 is uniformly arranged on the second surface 312 of the mounting disc 31 along the circumferential direction of the mounting disc 31. When the driving assembly 20 rotates by the energy source provided by the power supply line, the fan assembly 30 is driven to rotate, thereby generating a dust collection airflow and / or a heat dissipation airflow, the heat dissipation airflow cools the driving assembly 20 in the housing 10, and the dust collection airflow absorbs dust generated by the bottom plate assembly 40. Further, the blades of the heat dissipation fan 32 and the dust collection fan 33 are both curved and arc-shaped.

[0046] For example, the fan assembly 30 in the embodiment comprises a plastic fan assembly 30, i.e. the mounting disc 31, the heat dissipation blades and the dust collection blades in the fan assembly 30 are all made of plastic. In the embodiment, the material of the fan assembly 30 is changed from the traditional aluminum alloy material to the plastic material, which can further reduce the manufacturing cost of the fan assembly 30. Further, the fan assembly 30 is an integrally formed structure, i.e. the mounting disc 31, the heat dissipation blades and the dust collection blades are integrally formed. In the embodiment, the dust collection fan 33 and the heat dissipation fan 32 are integrated together to form a double-sided fan, which is beneficial to shorten the height of the sander in the up-down direction, make the overall structure of the sander more compact, and reduce the weight of the sander.

[0047] Continuing to refer to Figures 5-6 In an embodiment, the polishing tool further comprises a guide portion 34, the inner side of the housing 10 is provided with a bearing space 14 corresponding to the fan assembly 30, at least part of the guide portion 34 is located in the bearing space 14. Further, the inner side of the housing 10 is provided with a bearing space 14 corresponding to the outer periphery of the dust collection fan 33, and the bearing space 14 is provided with at least two partition openings 144. For example, the inner side of the housing 10 comprises oppositely arranged first and second assembly portions 141 and 142 along the first axis f, and a third assembly portion 143 connecting the first and second assembly portions 141 and 142, and the first, second and third assembly portions 141, 142 and 143 form the bearing space 14. It should be noted that in the embodiment, the first, second and third assembly portions 141, 142 and 143 are all discontinuously arranged at the dust outlet 13, and the first and second assembly portions 141 and 142 are discontinuously arranged at the partition opening 144.

[0048] For example, the guide portion 34 includes a main body portion 341 and at least two connecting portions 342 disposed on the main body portion 341 and extending along a radial direction of the main body portion 341. The main body portion 341 of the guide portion 34 is located in the bearing space 14, and the connecting portions 342 of the guide portion 34 are clamped at the corresponding partition openings 144. For example, the main body portion 341 of the guide portion 34 is attached to the third assembly portion 143 on a side of the sidewall of the fan assembly 30, and the connecting portions 342 further fill the partition openings 144. In this way, the guide portion 34 is fixed in the housing 10, and the guide portion 34 is prevented from moving in the housing 10 during operation of the sanding tool.

[0049] Further, the thickness of the main body portion 341 gradually decreases along a preset rotation direction of the fan assembly 30 (for example, the direction indicated by the arrow n). Since the thickness m of the main body portion 341 gradually decreases along the preset rotation direction of the fan assembly 30, the width d of the guide channel 35 gradually increases along the preset rotation direction of the fan assembly 30. In this way, the dust suction resistance of the dust exhaust airflow formed by the fan assembly 30 is reduced when the dust exhaust airflow flows along the guide channel 35, the dust suction performance is improved, and the energy consumption of the sander during operation is reduced. Figure 5

[0050] In an embodiment, the sanding tool further includes a counterweight assembly 50 connected to the driving assembly 20 and located on a side of the dust collection fan 33 away from the heat dissipation fan 32. The counterweight assembly 50 includes an eccentric shaft 51 sleeved on the motor shaft 22, a connecting block 52 sleeved on the eccentric shaft 51, and a counterweight block 53 located on the outer periphery of the connecting block 52. The counterweight block 53 is in the shape of a fan or a semicircle. The motor 21 drives the counterweight assembly 50 to rotate, so that the connecting block 52 of the counterweight assembly 50 and the fan-shaped or semicircular counterweight block 53 rotate and swing around the center of the eccentric shaft 51 as the rotation point. When the eccentric counterweight block structure rotates, the bottom plate assembly 40 connected to the motor shaft 22 will produce eccentric swinging, thereby effectively processing the surface of the workpiece to be processed. The counterweight assembly 50 is used to balance the eccentric swinging motion of the bottom plate assembly 40, so that the bottom plate assembly 40 operates stably.

[0051] Reference Figure 2 In an embodiment, the sanding tool further includes a bottom plate assembly 40 located on a side of the counterweight assembly 50 away from the fan assembly 30, and the driving assembly 20 drives the bottom plate assembly 40 to swing eccentrically through the counterweight assembly 50. For example, the bottom plate assembly 40 includes a bottom plate and a sanding member fixed to the bottom plate. The side of the bottom plate away from the housing 10 is provided with the sanding member, which can be sandpaper or other types of abrasive or polishing members. The sanding member can be removably attached to the bottom plate in a conventional manner, such as hook and loop fasteners and / or clamping retainers (not shown).

[0052] ​With reference to the above Figure 2 In an embodiment, the polishing tool further comprises a bearing assembly 60, the bearing assembly 60 comprising a first bearing 61 and a bearing seat 62, the inner ring of the first bearing 61 being sleeved on the eccentric shaft 51, and the bearing seat 62 being sleeved on the outer ring of the first bearing 61 and fixedly connected with the bottom plate assembly 40 (the bottom plate). By arranging the first bearing 61 on the eccentric shaft 51, the friction coefficient between the motor shaft 22 and the bearing assembly when rotating can be reduced, and the rotation accuracy and parallelism of the motor shaft 22 can be ensured. Specifically, the first bearing 61 is a rolling bearing, which comprises an outer ring, an inner ring and rolling balls. The inner ring is sleeved on the eccentric shaft 51 and fixedly connected with the eccentric shaft 51. The outer ring is fixedly connected with the bearing seat 62 and arranged around the inner ring. The rolling balls are arranged between the outer ring and the inner ring to enable the outer ring to move relative to the inner ring. Since the bearing seat 62 is sleeved on the outer ring of the first bearing 61, the outer ring of the first bearing 61 and the bearing seat 62 are synchronously connected, and the bearing seat 62 is fixedly connected with the bottom plate, that is, the bottom plate can synchronously move with the bearing seat 62 and the outer ring of the first bearing 61.

[0053] With reference to the above Figure 2 And Figures 8-9 In an embodiment, the shell 10 is further provided with a dust outlet 13, the extension direction of the dust outlet 13 being the same as that of the handle part 11, and the dust outlet 13 is connected with an adapter 70. By arranging the adapter on the dust outlet 13, a dust collecting box or a suction pipe of a dust collector can be connected. In an example, the adapter 70 in the embodiment has a first end 71 and a second end 72 which are in communication with each other, the first end 71 of the adapter 70 is detachably connected with the dust outlet 13 of the shell 10, for example, the outer periphery of the dust outlet 13 of the shell 10 is provided with at least two radially extending protruding parts 131, the first end 71 of the adapter 70 is provided with a locking buckle 73, and when the adapter 70 is arranged to be in abutment with the dust outlet 13, the locking buckle 73 is overlapped with the corresponding protruding part 131 to realize locking.

[0054] Further, the second end 72 of the adapter 70 comprises a first through hole 721 and a second through hole 722 in communication with each other, the first through hole 721 is located on the side of the second through hole 722 away from the first end 71 of the adapter 70, the first through hole 721 has a first hole diameter, the second through hole 722 has a second hole diameter, the first hole diameter is larger than the second hole diameter, for example, the first hole diameter is between 34-35 mm, and the second hole diameter is between 30-32 mm, when the operator uses the polishing tool, one is to connect the dust outlet 13 of the polishing tool directly with the dust collection box, when connected with the dust collection box, the opening of the dust collection box can be directly sleeved on the first through hole 721, thereby realizing the connection of the adapter 70 and the dust collection box; the other is to connect the dust collector through the adapter 70, but the interfaces of different types of dust collectors are different in size, the polishing tool in the prior art will be provided with at least two adapters 70 to adapt to different types of dust collectors, but this further increases the manufacturing cost of the polishing tool, therefore, in the embodiment, the second end 72 of the adapter 70 is provided with the first through hole 721 and the second through hole 722 in communication with each other, and the hole diameters of the first through hole 721 and the second through hole 722 are different, so that only one adapter 70 can adapt to dust collectors with different interface sizes, which not only improves the utilization rate of the adapter 70, but also reduces the manufacturing cost of the polishing tool.

[0055] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A sharpening tool characterized in that, The polishing tool comprises: a shell provided with a dust outlet; a driving assembly at least partially located in the shell; a fan assembly located in the shell, the driving assembly driving the fan assembly to rotate around a first axis, the outer periphery of the fan assembly being provided with a guide portion detachably connected with the shell, the guide portion being provided with a gap corresponding to the dust outlet, and a guide channel being formed between the guide portion and the fan assembly, the width of the guide channel gradually increasing along the preset rotation direction of the fan assembly.

2. The polishing tool according to claim 1, wherein the fan assembly comprises: a mounting disc sleeved on the output shaft of the driving assembly, the mounting disc having a first surface and a second surface oppositely arranged in the extension direction of the first axis; a heat dissipation fan uniformly arranged on the first surface of the mounting disc along the circumferential direction of the mounting disc; a dust collection fan uniformly arranged on the second surface of the mounting disc along the circumferential direction of the mounting disc.

3. The polishing tool according to claim 1, wherein the fan assembly comprises a plastic fan assembly.

4. The polishing tool according to claim 2, wherein the inner side of the shell is provided with a bearing space corresponding to the outer periphery of the dust collection fan, and at least two partition openings are arranged in the bearing space, the guide portion comprises a main body portion and at least two connecting portions arranged on the main body portion and extending along the radial direction of the main body portion, the main body portion of the guide portion being located in the bearing space, and the connecting portions of the guide portion being clamped at the corresponding partition openings.

5. The polishing tool according to claim 4, wherein the thickness of the main body portion gradually decreases along the preset rotation direction of the fan assembly.

6. The sharpening tool of claim 2, wherein, Further comprising a counterweight assembly connected with the driving assembly and located on the side of the dust collection fan away from the heat dissipation fan; the counterweight assembly comprises an eccentric shaft sleeved on the output shaft of the driving assembly and a connecting block sleeved on the eccentric shaft, and the outer periphery of the connecting block is provided with a fan-shaped or semicircular counterweight block.

7. The polishing tool according to claim 6, further comprising a bottom plate assembly connected with the counterweight assembly, the driving assembly driving the bottom plate assembly to eccentrically swing through the counterweight assembly, and the bottom plate assembly comprising a bottom plate and a polishing member fixed to the bottom plate.

8. The polishing tool according to claim 7, further comprising an adapter assembly located between the bottom plate assembly and the counterweight assembly; the adapter assembly comprises a first bearing and a bearing seat, the inner ring of the first bearing being sleeved on the eccentric shaft, and the bearing seat being sleeved on the outer ring of the first bearing and fixedly connected with the bottom plate.

9. The polishing tool according to claim 1, further comprising an adapter piece having a first end and a second end in communication with each other, the first end of the adapter piece being detachably connected with the dust outlet of the shell. The outer periphery of the dust outlet of the shell is provided with at least two radially extending protrusions, the first end of the adapter is provided with a locking buckle, and when the adapter is matched with the dust outlet, the locking buckle is overlapped with the corresponding protrusion to achieve locking.

10. The abrasive tool of claim 9, wherein, The second end of the adapter comprises a first through hole and a second through hole in communication with each other, the first through hole is located on the side of the second through hole away from the first end of the adapter, the first through hole has a first hole diameter, the second through hole has a second hole diameter, and the first hole diameter is larger than the second hole diameter.

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