A wall surface polisher

Abstract

A wall sander includes a drive motor, a sanding head, a housing, and a handheld handle pivotally connected to the housing. The drive motor is installed inside the housing to drive the sanding head. The handheld handle is configured to guide dust. The handheld handle includes a hollow first rod and a second rod. The second rod and the first rod are sealed together by a locking device to restrict the sliding of the second rod. The locking device includes a mating portion fixed to the first rod and a connecting portion fixed to the second rod. The mating portion and the connecting portion are detachably connected. When the connecting portion is connected to the mating portion, it is inserted into the mating portion. The mating portion includes a blocking surface. The wall sander also includes a sealing element fixed to the free end of the connecting portion. The free end of the connecting portion abuts against the blocking surface. When the second rod and the first rod are in a locked state, the sealing element seals the gap between the connecting portion and the mating portion.

Description

Technical Field

[0001] This utility model relates to the field of power tools, specifically to a wall sander. Background Technology

[0002] In recent years, most wall sanders on the market include a handheld handle, a sanding head, and a drive motor. When using them, people hold the back end of the handheld handle to sand the wall surface. The dust exhaust hose is connected to the main body of the machine. Modern wall sanders include extension rods to adapt to different working environments. The extension rod is inserted into the handheld handle and can slide relative to it. There is a gap between the extension rod and the handheld handle. When using the sander, dust easily leaks out from the gap, making dust leakage at the connection between the extension rod and the handheld handle very common and serious. This greatly affects work efficiency and causes great inconvenience to users. Utility Model Content

[0003] The purpose of this application is to overcome the shortcomings of existing technologies by eliminating the sealing ring between the extension rod and the hand handle, and replacing it with a labyrinth structure, thus providing a wall sander that is less prone to dust leakage. This utility model is achieved through the following technical solution:

[0004] A wall sander includes a drive motor, a sanding head, a housing, and a hand handle pivotally connected to the housing. The drive motor is installed inside the housing to drive the sanding head. The hand handle is configured to guide dust. The hand handle includes a hollow first rod and a second rod. The second rod and the first rod are sealed together by a locking device to restrict the sliding of the second rod. The locking device includes a mating portion fixed to the first rod and a connecting portion fixed to the second rod. The mating portion and the connecting portion are detachably connected. When the connecting portion is connected to the mating portion, it is inserted into the mating portion. The mating portion includes a blocking surface. The wall sander also includes a sealing element fixed to the free end of the connecting portion. The free end of the connecting portion abuts against the blocking surface. When the second rod and the first rod are in a locked state, the sealing element seals the gap between the connecting portion and the mating portion to prevent dust from leaking out from the connection between the second rod and the first rod.

[0005] Furthermore, the sealing element is a sealing ring, and the sealing ring is made of rubber.

[0006] Furthermore, the locking device includes a locking part, which is detachably connected to the connecting part on the side away from the docking part. The connecting part includes a buckle at the end near the locking part, and the buckle includes a limiting inclined surface. When the second rod and the first rod are in a locked state, the limiting inclined surface abuts against the locking part. As the locking device is tightened, the buckle and the second rod become increasingly tightly engaged.

[0007] Furthermore, the connecting portion includes a thread, and the locking portion is connected to the connecting portion via the thread.

[0008] Furthermore, the buckle is circumferentially disposed on the connecting part and there is a gap between the plurality of buckles. When the locking part moves toward the connecting part, the buckle deforms at the gap to lock the second rod.

[0009] Furthermore, the locking part includes an inner peripheral wall, which abuts against the limiting inclined surface, and the connecting part is partially submerged in the locking part.

[0010] Furthermore, the docking portion is fixedly connected to the first rod, the second rod is slidably relative to the connecting portion, and the connecting portion is partially submerged in the docking portion.

[0011] Furthermore, the wall sander includes a dust exhaust pipe, one end of which is connected to the machine housing, and the other end of which is connected to the hand handle.

[0012] The first and second rods of the wall sander are slidably inserted into each other and locked by a locking device. The locking device includes a mating part, a connecting part, and a locking part arranged sequentially. A sealing ring is provided on the portion of the connecting part that is submerged in the mating part. The sealing ring abuts against the blocking surface of the mating part to achieve a dustproof effect. The locking part is detachably connected to the connecting part using a threaded structure, and the buckle of the connecting part has a limiting bevel. When the locking part is in the installed state, the limiting bevel abuts against the inner circumferential wall of the locking part, thus tightening the connection and increasing stability. A sealing ring is provided between the extension rod and the handle rod, providing a wall sander that is less prone to dust leakage, increasing the lifespan of the wall sander, making operation more convenient, and greatly improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a perspective view of a wall sander according to an embodiment of this application.

[0014] Figure 2 for Figure 1 The image shows a partial sectional view of a wall sander.

[0015] Figure 3 for Figure 1 A partial cross-sectional view of the wall sander from another angle.

[0016] Figure 4 for Figure 1 The image shown is a 3D view of the wall sander connection with a sealing ring.

[0017] Figure 5 for Figure 1 The image shows a 3D view of the locking mechanism of a wall sander.

[0018] Figure 6 for Figure 1 The diagram shows a 3D view of the joint of the wall sander. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0020] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper" and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "linked" and similar terms are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0021] Combination Figures 1 to 6A wall sander 100 includes a drive motor (not shown), a sanding head (not shown), a housing 101, and a handheld lever 104 pivotally connected to the housing 101. The drive motor is installed inside the housing 101 to drive the sanding head. The handheld lever 104 is configured to guide dust. The handheld lever 104 includes a hollow first lever 1 and a hollow second lever 2. The second lever 2 and the first lever 1 are sealed together by a locking device 3 to restrict the sliding of the second lever 2. The locking device 3 includes a mating portion 4 fixed to the first lever 1. The connecting part 5 is fixed to the second rod 2. The docking part 4 and the connecting part 5 are detachably connected. When the connecting part 5 is connected to the docking part 4, it is inserted into the docking part 4. The docking part 4 includes a blocking surface 41. The wall sander 100 also includes a sealing element 51 fixed to the free end of the connecting part. The free end of the connecting part abuts against the blocking surface 41. When the second rod 2 and the first rod 1 are in a locked state, the sealing element 51 seals the gap between the connecting part 5 and the docking part 4 to prevent dust from leaking out from the connection between the second rod 2 and the first rod 1.

[0022] Preferably, the sealing element 51 is fixedly connected to the connecting part 5, and the sealing element 51 is a sealing ring. The sealing ring is made of rubber, which has better elasticity and can deform to fill gaps when squeezed.

[0023] Combination Figure 2 and Figure 3 The locking device 3 includes a locking part 6, which is detachably connected to the connecting part 5 on the side away from the docking part 4. The connecting part 5 includes a buckle 53 at the end near the locking part 6. The buckle 53 includes a limiting inclined surface 531. When the second rod 2 and the first rod 1 are in a locked state, the limiting inclined surface 531 abuts against the locking part 6. As the locking device 3 is tightened, the buckle 53 and the second rod 2 become increasingly tightly bound together.

[0024] Preferably, the connecting part 5 includes a thread, and the locking part 6 is connected to the connecting part 5 via the thread.

[0025] Combination Figures 2 to 4 The buckle 53 is circumferentially disposed on the connecting part 5 and a gap 56 is provided between the plurality of buckles 53. When the locking part 6 moves toward the connecting part 5, the buckle 53 deforms at the gap 56 to lock the second rod 2.

[0026] Preferably, the locking part 6 includes an inner peripheral wall 62, which abuts against the limiting inclined surface 531, and the connecting part 5 is partially submerged in the locking part 6. The docking part 4 is fixedly connected to the first rod 1, and the second rod 2 and the connecting part 5 are slidable relative to each other, with the connecting part 5 partially submerged in the docking part 4.

[0027] Combination Figure 1 The wall sander 100 includes a first dust exhaust pipe 102, one end of which is connected to the housing 101, and the other end of which is connected to the hand handle 104.

[0028] The first rod 1 and the second rod 2 of the wall sander 100 are slidably inserted into each other and locked by the locking device 3. The locking device 3 includes a docking part 4, a connecting part 5, and a locking part 6 arranged sequentially. A sealing ring is provided on the portion of the connecting part 5 that is submerged in the docking part 4. The sealing ring abuts against the blocking surface of the docking part to achieve a dustproof effect. The locking part 6 is detachably connected to the connecting part 5 by a threaded structure. The buckle 53 of the connecting part 5 is provided with a limiting inclined surface 531. When the locking part 6 is in the installed state, the limiting inclined surface 531 abuts against the inner peripheral wall 62 of the locking part 6, thereby tightening the connection and increasing stability. A sealing ring is provided between the extension rod and the handle rod, providing a wall sander that is less prone to dust leakage, increasing the service life of the wall sander, making operation more convenient, and greatly improving work efficiency.

[0029] It should be understood that the accompanying drawings illustrate exemplary embodiments in detail, and it should be understood that this application is not limited to the details or methods set forth in the specification or illustrated in the drawings. It should also be understood that the terminology is for descriptive purposes only and should not be considered limiting.

[0030] In view of this specification, further modifications and alternative embodiments of various aspects of the invention will be apparent to those skilled in the art. Therefore, this description should be interpreted as illustrative only. The configurations and arrangements shown in the various exemplary embodiments are merely illustrative. Although only some embodiments have been described in detail in this disclosure, many modifications (e.g., variations in the size, dimensions, structure, shape and proportions of various elements, values ​​of parameters, mounting arrangements, use of materials, color, orientation, etc.) can be made without substantially departing from the novel teachings and advantages described herein. Some elements shown as integrally formed may be constructed from multiple parts or elements, the positions of elements may be reversed or otherwise changed, and the nature or number or position of discrete elements may be changed or varied. According to alternative embodiments, the order or sequence of any process, logical algorithm, or method steps may be changed or reordered. Other substitutions, modifications, alterations, and omissions may be made to the design, operating conditions, and arrangements of the various exemplary embodiments without departing from the scope of the invention.

[0031] Although the present application describes specific combinations of features in the appended claims, various embodiments of the invention relate to any combination of any features described herein, whether or not such combinations are currently claimed, and any such combination of features may be claimed in this application or in a future application. Any feature, element, or component of any exemplary embodiment discussed above may be used alone or in combination with any feature, element, or component of any other embodiment discussed above.

[0032] In various exemplary embodiments, relative dimensions, including angles, lengths, and radii, as shown in the accompanying drawings, are drawn to scale. Actual measurements in the drawings will disclose the relative dimensions, angles, and scales of the various exemplary embodiments. The various exemplary embodiments extend to a wide range around absolute and relative dimensions, angles, and scales that can be determined from the accompanying drawings. The various exemplary embodiments include any combination of one or more relative dimensions or angles that can be determined from the accompanying drawings. Furthermore, actual dimensions not explicitly stated in this specification can be determined by combining the scales of the dimensions measured in the accompanying drawings with the explicit dimensions stated in this specification.

Claims

1. A wall sander, comprising a drive motor, a sanding head, a housing, and a hand handle pivotally connected to the housing, wherein the drive motor is mounted inside the housing to drive the sanding head, the hand handle is configured to guide dust, the hand handle includes a hollow first rod and a second rod, the second rod and the first rod being sealed together by a locking device to restrict the sliding of the second rod, characterized in that: The locking device includes a docking part fixed to the first rod and a connecting part fixed to the second rod. The docking part and the connecting part are detachably connected. When the connecting part is connected to the docking part, it is inserted into the docking part. The docking part includes a blocking surface. The wall sander also includes a sealing element fixed to the free end of the connecting part. The free end of the connecting part abuts against the blocking surface. The second rod and the first rod are in a locked state. The sealing element seals the gap between the connecting part and the docking part.

2. The wall sander according to claim 1, characterized in that: The sealing element is a sealing ring.

3. The wall sander according to claim 2, characterized in that: The sealing ring is made of rubber.

4. The wall sander according to claim 1, characterized in that: The locking device includes a locking part, which is detachably connected to the connecting part.

5. The wall sander according to claim 4, characterized in that: The end near the locking part includes a buckle, the buckle includes a limiting slope, the second rod and the first rod are in a locked state, and the limiting slope abuts against the locking part.

6. The wall sander according to claim 4, characterized in that: The connecting part includes a thread, and the locking part is connected to the connecting part through the thread.

7. The wall sander according to claim 5, characterized in that: The buckles are circumferentially disposed on the connecting portion and there are gaps between the plurality of buckles.

8. The wall sander according to claim 5, characterized in that: The locking part includes an inner peripheral wall, which abuts against the limiting inclined surface, and the connecting part is partially submerged in the locking part.

9. The wall sander according to claim 4, characterized in that: The docking part is fixedly connected to the first rod, and the second rod can slide relative to the connecting part, with the connecting part partially submerged in the docking part.

10. The wall sander according to claim 9, characterized in that: The wall sander includes a dust exhaust pipe, one end of which is connected to the machine housing, and the other end of which is connected to the hand handle.

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