Wall surface grinding machine

Abstract

A wall face grinding machine comprises a driving motor, a grinding head, a machine shell and a handheld rod connected with the machine shell in a pivoted mode, the driving motor is installed in the machine shell to drive the grinding head to work, and the handheld rod is configured to guide dust and comprises a first rod body and a second rod body; the second rod and the first rod are slidably connected in an inserted mode and locked through a locking device so as to limit sliding of the second rod, the locking device comprises a butt joint part and a connecting part which are sequentially arranged, the butt joint part and the connecting part are detachably connected, the connecting part comprises an outer surface, the butt joint part comprises an inner surface surrounding the outer surface, and the inner surface is provided with an inner surface surrounding the outer surface. The end, close to the butt joint part, of the connecting part comprises a plurality of annular ribs protruding from the outer surface to the inner surface, and when the second rod and the first rod are in a locked state, the annular ribs seal a gap between the inner surface and the outer surface to prevent dust from leaking out of the connecting position of the second rod and the first rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric tools, concretely relates to a wall polisher. BACKGROUND

[0002] In recent years, the polisher on the market mostly includes a hand-held rod, a polishing head and a driving motor, when in use, people hold the rear end of the hand-held rod to polish the wall; the dust exhaust hose is connected with the machine body, the current wall polisher includes an extension rod to adapt to different working environments, the extension rod is inserted into the hand-held rod and can slide relatively, a sealing ring is arranged between the extension rod and the hand-held rod, and the sealing of the two is realized by the sealing ring. However, the sealing ring has the risks of aging, being easily squeezed, being easily deformed, being easily displaced or being easily detached, thereby causing dust leakage at the connection between the extension rod and the hand-held rod, which is very common and very serious, greatly affects the work efficiency and brings great trouble to the user. SUMMARY

[0003] The purpose of the present application is to overcome the deficiencies in the prior art, cancel the sealing ring between the extension rod and the hand-held rod, and instead use a labyrinth structure to provide a wall polisher that is less likely to leak dust. The utility model is realized by the following technical solutions:

[0004] A wall polisher includes a driving motor, a polishing head, a machine shell and a hand-held rod pivotally connected with the machine shell, the driving motor is installed in the machine shell to drive the polishing head to work, the hand-held rod is configured to guide dust, the hand-held rod includes a first rod and a second rod, the second rod is slidably inserted into the first rod and locked by a locking device to limit the sliding of the second rod, the locking device includes a butt joint portion and a connecting portion arranged in sequence, the butt joint portion and the connecting portion are detachably connected, the connecting portion includes an outer surface, the butt joint portion includes an inner surface surrounding the outer surface, the connecting portion includes a plurality of annular ribs protruding from the outer surface to the inner surface at one end close to the butt joint portion, when the second rod and the first rod are in the locked state, the plurality of annular ribs close the gap between the inner surface and the outer surface to prevent dust from leaking out of the connection between the second rod and the first rod.

[0005] Further, the locking device includes a locking portion, the locking portion is detachably connected with the connecting portion at a side away from the butt joint portion, the connecting portion includes a buckle at one end close to the locking portion, the buckle includes a limiting inclined surface, when the second rod and the first rod are in the locked state, the limiting inclined surface abuts against the locking portion, and as the locking device is tightened, the buckle holds the second rod more tightly.

[0006] Further, the connecting portion includes a pressing arm, the locking portion includes a limiting ring, when the connecting portion and the locking portion are in the connected state, the limiting ring is configured to limit the movement of the pressing arm.

[0007] Further, the connecting part comprises a locking claw part, the docking part comprises a locking groove, the locking claw part is correspondingly arranged with the locking groove and is configured to lock the docking part and the connecting part.

[0008] Further, the connecting part comprises a screw thread, and the locking part is connected with the connecting part through the screw thread.

[0009] Further, the buckles are circumferentially arranged on the connecting part, gaps are arranged between the buckles, and the locking part is moved to face the connecting part, so that the buckles are deformed at the gaps to lock the second rod.

[0010] Further, the locking part comprises an inner circumferential wall, the inner circumferential wall abuts against the limiting inclined surface, and the connecting part is partially immersed in the locking part.

[0011] Further, the docking part is fixedly connected with the first rod, the second rod is relatively slidable with the connecting part, and the connecting part is partially immersed in the docking part.

[0012] Further, the wall surface polishing machine comprises a dust exhaust pipe, one end of the dust exhaust pipe is connected with the machine shell, and the other end of the dust exhaust pipe is connected with the handheld rod.

[0013] Further, the wall surface polishing machine comprises a dust collecting device, and the wall surface polishing machine comprises a dust exhaust pipe, one end of the dust exhaust pipe is connected with the handheld rod, and the other end of the dust exhaust pipe is connected with the dust collecting device.

[0014] The first rod and the second rod of the wall surface polishing machine are slidably inserted and locked through a locking device, the locking device comprises a docking part, a connecting part and a locking part arranged in sequence, a plurality of annular ribs are arranged on the part of the connecting part immersed in the docking part, the plurality of annular ribs form a labyrinth structure and abut against the inner surface of the docking part to achieve a dustproof effect, without the risks of aging, damage and loss of the sealing ring. The locking part is detachably connected with the connecting part through a screw thread structure, and the buckle of the connecting part is provided with a limiting inclined surface, when the locking part is in an installed state, the limiting inclined surface abuts against the inner circumferential wall of the locking part to make the locking part hold tighter and tighter, thereby increasing stability. The sealing ring between the extension rod and the handheld rod is cancelled, and the labyrinth structure is used instead, thereby providing a wall surface polishing machine which is less likely to leak dust, increasing the service life of the wall surface polishing machine, making the operation more convenient, and greatly improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the wall surface polishing machine according to an embodiment of the present application.

[0016] Figure 2 FIG. 1 shows a perspective view of a wall sanding machine according to an example embodiment. Figure 1 FIG. 2 shows a partial cross-sectional view of the wall sanding machine shown in FIG. 1.

[0017] Figure 3 FIG. 3 shows another angle partial cross-sectional view of the wall sanding machine shown in FIG. 1. Figure 1 FIG. 4 shows a perspective view of a wall sanding machine connection according to an example embodiment.

[0018] Figure 4 FIG. 5 shows a perspective view of a wall sanding machine lock according to an example embodiment. Figure 1 FIG. 6 shows a perspective view of a wall sanding machine docking according to an example embodiment.

[0019] Figure 5 FIG. 7 shows a perspective view of a wall sanding machine docking according to an example embodiment. Figure 1 FIG. 8 shows a perspective view of a wall sanding machine docking according to an example embodiment.

[0020] Figure 6 FIG. 9 shows a perspective view of a wall sanding machine docking according to an example embodiment. Figure 1 FIG. 10 shows a perspective view of a wall sanding machine docking according to an example embodiment. DETAILED DESCRIPTION

[0021] Example embodiments are described herein with reference to the accompanying drawings, in which example embodiments are shown. The description of example embodiments is not meant to represent all embodiments consistent with the present application. Rather, the description is meant to represent example embodiments consistent with the present application.

[0022] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The use of the terms "first", "second" and like terms in the present application is not meant to denote any order, quantity, or importance, but is merely to distinguish one element from another. Also, the use of the terms "a" and "an" and the like in the present application are not meant to denote a quantity of one, but rather denote the presence of at least one. The use of the term "plurality" or "a plurality" in the present application indicates two or more. The use of the terms "front", "back", "up", and / or "down" in the present application is merely for ease of description and is not intended to limit the position or spatial orientation of an element. The use of the terms "include", "includes", "including", and / or "comprise", "comprises", "comprising" in the present application is meant to be inclusive, not exclusive. The use of the terms "connected", "coupled", and / or "connected" in the present application is meant to include both direct and indirect connections or couplings between elements. The use of singular terms in the present application is meant to include the plural, unless otherwise clear from the context. It is further understood that the use of the term "and / or" in the present application is meant to encompass all possible combinations of one or more of the associated listed items.

[0023] In combination Figures 1 to 6 A wall polisher 100, comprising a driving motor (not shown), a polishing head (not shown), a machine shell 101 and a hand pole 104 pivotally connected with the machine shell 101, the driving motor is installed in the machine shell 101 to drive the polishing head to work, the hand pole 104 is configured to guide dust, the hand pole 104 comprises a first pole 1 and a second pole 2, the second pole 2 is slidably inserted with the first pole 1 and locked by a locking device 3 to limit the sliding of the second pole 2, the locking device 3 comprises a docking part 4 and a connecting part 5 arranged in sequence, the docking part 4 and the connecting part 5 are detachably connected, the connecting part 5 comprises an outer surface 52, the docking part 4 comprises an inner surface 41 surrounding the outer surface 52, the connecting part 5 comprises a plurality of annular ribs 51 protruding from the outer surface 52 to the inner surface 41 at one end close to the docking part 4, when the second pole 2 is in the locked state with the first pole 1, the plurality of annular ribs 51 enclose the gap between the inner surface 41 and the outer surface 52 to prevent dust from leaking out from the connection between the second pole 2 and the first pole 1.

[0024] In combination Figures 3 to 6The connecting part 5 comprises a pressing arm 54, the locking part 6 comprises a limiting ring 61, the connecting part 5 is connected with the locking part 6, and the limiting ring 61 is configured to limit the movement of the pressing arm 54. The connecting part 5 comprises a locking claw part 55, the docking part 4 comprises a locking groove 42, the locking claw part 55 is correspondingly arranged with the locking groove 42 and is configured to lock the docking part 4 and the connecting part 5.

[0025] The locking device 3 comprises a locking part 6, which is detachably connected with the connecting part 5 away from the docking part 4. The connecting part 5 comprises a buckle 53 at one end close to the locking part 6. The buckle 53 comprises a limiting inclined surface 531. When the second rod 2 is in a locked state with the first rod 1, the limiting inclined surface 531 abuts against the locking part 6. As the locking device 3 is tightened, the buckle 53 is more tightly clamped with the second rod 2.

[0026] Preferably, the connecting part 5 comprises a thread, and the locking part 6 is connected with the connecting part 5 through the thread.

[0027] In combination Figures 2 to 4 The buckle 53 is circumferentially arranged on the connecting part 5, and gaps 56 are arranged between the plurality of buckles 53. When the locking part 6 moves towards the connecting part 5, the buckle 53 deforms at the gap 56 to lock the second rod 2.

[0028] Preferably, the locking part 6 comprises an inner circumferential wall 62 abutting against the limiting inclined surface 531, and the connecting part 5 is partially immersed in the locking part 6. The docking part 4 is fixedly connected with the first rod 1, the second rod 2 is relatively slidable with the connecting part 5, and the connecting part 5 is partially immersed in the docking part 4.

[0029] In combination Figure 1 The wall polishing machine 100 comprises a first dust removal pipe 102, one end of the first dust removal pipe 102 is connected with the machine shell 101, and the other end of the dust removal pipe 102 is connected with the handheld rod 104.

[0030] Preferably, the wall polishing machine 100 comprises a dust collecting device (not shown), and the wall polishing machine 100 comprises a second dust removal pipe 103, one end of the second dust removal pipe 103 is connected with the handheld rod 104, and the other end of the second dust removal pipe 103 is connected with the dust collecting device.

[0031] The first rod 1 and the second rod 2 of the wall polisher 100 are slidably inserted and locked by the locking device 3, the locking device 3 comprises a docking portion 4, a connecting portion 5 and a locking portion 6 arranged in sequence, a plurality of annular ribs 51 are arranged on the part of the connecting portion 5 immersed in the docking portion 4, the plurality of annular ribs 51 form a labyrinth structure and abut the inner surface 41 of the docking portion 4 to achieve dustproof effect, without the risks of aging, damage and loss of sealing rings. And the locking portion 6 is detachably connected with the connecting portion 5 by a threaded structure, and the buckle 53 of the connecting portion 5 is provided with a limiting inclined surface 531, when the locking portion 6 is in the installed state, the limiting inclined surface 531 abuts the inner peripheral wall 62 of the locking portion 6 to make the locking portion 6 hold tighter and increase stability. Cancel the sealing ring between the first rod 1 and the second rod 2, and use the labyrinth structure instead, to provide a wall polisher 100 that is less likely to leak dust and increase the service life of the wall polisher 100.

[0032] It should be understood that the drawings detail exemplary implementations and that the application is not limited to the details or methodology set forth in the description or illustrated in the drawings. It should also be understood that the terminology is for the purpose of description only and should not be considered as limiting.

[0033] Further modifications and alternative embodiments of various aspects of the application will be apparent to one skilled in the art in view of this description. Therefore, this description should be construed as merely illustrative of exemplary embodiments. The configurations and arrangements depicted herein are described in detail to provide a thorough understanding of the elements, construction, and operation and to provide for the preferred embodiments. It will be apparent to those skilled in the art that many modifications, over and above those already described, can be made to a variety of embodiments, and are contemplated as falling within the scope of the inventive concept. Accordingly, the drawings and descriptions should not be construed as limiting the scope of the application. The only genuine limitation to the application resides in the claims following this description.

[0034] While the present application describes particular combinations of features in the claims appended hereto, various embodiments of the application relate to any combination of any of the features described herein, whether or not that combination is presently claimed, and any such combination of features can be claimed in this application or in a future application. Any feature, element, or component of any of the example embodiments discussed above can be used alone or in combination with any feature, element, or component of any other embodiment discussed above.

[0035] In various example embodiments, relative dimensions including angles, lengths and radii as depicted in the drawings are drawn to scale. The actual measurements of the drawings will disclose relative dimensions, angles and proportions of various example embodiments. Various example embodiments extend to various ranges of absolute dimensions and relative dimensions, angles and proportions around which the various example embodiments can be scaled. Various example embodiments include any combination of one or more relative dimensions or angles that can be determined from the drawings. Furthermore, actual dimensions not explicitly stated in this specification can be determined by using the scale of the dimensions measured in the drawings in combination with explicit dimensions stated in this specification.

Claims

1. A wall polisher, comprising a driving motor, a polishing head, a machine housing, and a hand-held rod pivotally connected to the machine housing, the driving motor is installed in the machine housing to drive the polishing head to work, the hand-held rod is configured to guide dust, the hand-held rod comprises a first rod and a second rod, the second rod is slidably inserted into the first rod and locked by a locking device to limit the sliding of the second rod, characterized in that: the locking device comprises a docking portion and a connecting portion arranged in sequence, the docking portion and the connecting portion are detachably connected, the connecting portion comprises an outer surface, the docking portion comprises an inner surface surrounding the outer surface, the connecting portion comprises a plurality of annular ribs protruding from the outer surface to the inner surface at one end close to the docking portion, when the second rod is in a locked state with the first rod, the plurality of annular ribs enclose the gap between the inner surface and the outer surface to prevent dust from leaking out of the connection between the second rod and the first rod. The locking device comprises a locking portion, the connecting portion comprises a buckle at one end close to the locking portion, the buckle comprises a limiting inclined surface, and when the second rod is in a locked state with the first rod, the limiting inclined surface abuts against the locking portion.

2. The wall sanding machine of claim 1, wherein: The connecting portion comprises a pressing arm, the locking portion comprises a limiting ring, and when the connecting portion and the locking portion are in a connected state, the limiting ring is configured to limit the movement of the pressing arm.

3. The wall sanding machine of claim 2, wherein: The connecting portion comprises a locking claw portion, the docking portion comprises a locking groove, and the locking claw portion and the locking groove are correspondingly arranged and configured to lock the docking portion and the connecting portion.

4. The wall sanding machine of claim 3, wherein: The connecting portion comprises a screw thread, and the locking portion and the connecting portion are connected by the screw thread.

5. The wall sanding machine of claim 2, wherein: The buckle is circumferentially arranged on the connecting portion, and gaps are provided between the plurality of buckles.

6. The wall sanding machine of claim 5, wherein: The locking portion comprises an inner circumferential wall, the inner circumferential wall abuts against the limiting inclined surface, and the connecting portion is partially immersed in the locking portion.

7. The wall sanding machine of claim 6, wherein: The docking portion is fixedly connected to the first rod, the second rod is relatively slidable with the connecting portion, and the connecting portion is partially immersed in the docking portion.

8. The wall sanding machine of claim 2, wherein: The wall polisher comprises a dust exhaust pipe, one end of the dust exhaust pipe is connected to the machine housing, and the other end of the dust exhaust pipe is connected to the hand-held rod.

9. The wall sanding machine of claim 8, wherein: The wall polisher comprises a dust exhaust pipe, one end of the dust exhaust pipe is connected to the hand-held rod, and the other end of the dust exhaust pipe is connected to the dust collecting device.

10. The wall sanding machine of claim 8, wherein: ​

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