Grinding machine

Abstract

A grinding machine comprises a driving motor, a grinding disc and a machine shell, the driving motor is arranged in the machine shell and provides power for the grinding disc, the grinding disc comprises a grinding center, the grinding machine comprises an outer disc and a wear-resisting element, the grinding disc is covered with the outer disc, and the wear-resisting element is matched with the outer disc. The abrasion-resistant element comprises a clamping hook part, the outer disc comprises a clamping part, and the clamping hook part is clamped to the clamping part and applies force pointing to the grinding center to the clamping part.

Description

TECHNICAL FIELD

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

[0002] In recent years, people will polish and clean the wall in order to paint the wall, paste the wallpaper etc., and the sander can also polish wood or metal surface, the sanders on the market mostly include main machine shell, polishing head and driving motor, the main machine shell includes outer disc and wear-resistant strip, the outer disc and wear-resistant strip are clamped, when the machine works, the outer disc and wear-resistant strip have the risk of loosening or even falling off, which 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, improve the clamping mode of the polishing disc and the wear-resistant strip, and provide a sander that is not easy to loosen. The utility model is realized by the following technical solutions:

[0004] A sander, comprising a driving motor, a polishing disc and a machine shell, the driving motor is arranged in the machine shell and provides power for the polishing disc, the polishing disc comprises a polishing center, the sander comprises an outer disc and a wear-resistant element, the wear-resistant element is configured to prevent the machine shell from damaging the object being polished, the outer disc is covered on the polishing disc, the wear-resistant element and the outer disc cooperate with each other, the wear-resistant element comprises a hook part, the outer disc comprises a clamping part, the hook part is held in the clamping part, and a force directed to the polishing center is applied to the clamping part. Because the hook part applies a force to the outer disc along the radial direction of the polishing center, the outer disc always applies a force to the hook part along the radial direction of the polishing center, so the outer disc and the wear-resistant element are clamped more tightly.

[0005] Further, the wear-resistant element comprises a base and the hook part extending from the base, the outer disc comprises a receiving groove, the sander comprises a receiving groove inner wall, the receiving groove is defined by the receiving groove inner wall, and the clamping part is protruded from the receiving groove inner wall.

[0006] Further, the hook part comprises a cantilever and a lug, the cantilever extends from the base, and the lug extends from the cantilever along the radial direction of the polishing center and is arranged towards the polishing center.

[0007] Further, the cantilever is located in the receiving groove, and in the radial direction of the outer disc, the cantilever and the clamping part abut.

[0008] Furthermore, the wear-resistant element includes a plurality of the hook portions, the outer disk includes a plurality of the engaging portions, the plurality of the hook portions and the plurality of the engaging portions are distributed along the circumferential direction of the outer disk, and the plurality of the hook portions and the plurality of the engaging portions are correspondingly engaged.

[0009] Furthermore, the plurality of hook portions are evenly distributed, and the plurality of engaging portions are evenly distributed, so as to facilitate more stable installation of the wear-resistant element.

[0010] Furthermore, the wear-resistant element is made of a soft material, and the soft material may be rubber.

[0011] Further, the outer disc includes a groove portion, the wear-resistant element includes a protrusion portion, and the groove portion is configured to position the protrusion.

[0012] Furthermore, the groove portion includes inner walls of the groove portion, and the inner walls of the groove portion are arranged relative to each other to form an accommodation space to accommodate the protrusion, and the protrusion cooperates with the groove to position the outer disk and the wear-resistant element.

[0013] Furthermore, the outer disk includes a convex rib, which is formed by the inner wall of the groove portion and protrudes from the inner wall of the groove portion, and the convex rib abuts against the outer surface of the protruding portion.

[0014] The outer disc and wear-resistant element of the wall grinder are connected by a hook. The wear-resistant element includes a hook portion, which includes a protruding claw. The protruding claw extends radially inward and is positioned toward the grinding center. Because the hook portion applies a force radially inward toward the grinding center, the outer disc constantly applies a force radially outward toward the grinding center. This allows the outer disc to engage the wear-resistant element more tightly, preventing it from loosening or falling off, making operation more convenient and greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of a grinding machine according to one embodiment of the present application.

[0016] Figure 2 for Figure 1 A cross-sectional view of the grinding machine is shown.

[0017] Figure 3 for Figure 2 The figure shows a partial cross-section of the connection between the outer disc and the wear-resistant element of the grinder.

[0018] Figure 4 for Figure 2 The outer disc is shown in a three-dimensional view.

[0019] Figure 5 for Figure 2 A perspective view of the outer disc wear element is shown.

[0020] Figure 6 for Figure 4 a partial enlarged view of the outer disc shown in Fig.

[0021] Figure 7 for Figure 5 a partial enlarged view of the wear element shown in Fig. DETAILED DESCRIPTION

[0022] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, like reference numerals refer to like elements, unless the context clearly dictates otherwise. The following description is not intended to represent all embodiments in accordance with the present application.

[0023] 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, technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The use of the terms "first", "second", and "like" in the present application does not imply any order, quantity, or importance, but is merely used to distinguish one element from another. Also, the use of the terms "one" and "a" does not limit the quantity to one but rather means that at least one. "Multiple" or "plurality" means two or more. Unless otherwise indicated, the terms "front", "rear", "upper", and / or "lower" and like terms are used for convenience and are not intended to be limiting as to a particular position or spatial orientation. The terms "include" and "comprise" and like terms are used synonymously with "comprising" and / or "including" and are intended to mean the open term "comprising" and not a limiting term "consisting of". The term "connect" or "connected" is not intended to mean an exclusive "direct" connection or "indirect" connection unless otherwise indicated. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or", as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0024] In conjunction with Figures 1 to 7A sander 100, comprising a driving motor 101, a sander disc 102, a housing 103, the driving motor 101 is arranged in the housing 103 and provides power for the sander disc 102, the sander disc 102 comprises a sander center A, the sander center A is the geometric center of the sander disc 102, the sander 100 comprises an outer disc 1 and a wear-resistant element 2, the wear-resistant element 2 is configured to prevent the housing from damaging the object to be sanded, the outer disc 1 covers the sander disc 102, the wear-resistant element 2 and the outer disc 1 cooperate with each other, the wear-resistant element 2 comprises a hook part 21, the outer disc 1 comprises a clamping part 11, the hook part 21 is clamped in the clamping part 11, and the clamping part 11 is subjected to a force directed to the sander center A.

[0025] Preferably, the wear-resistant element 2 comprises a base 22 and the hook part 21 extending from the base 22, the outer disc 1 comprises a receiving groove 12 provided with a receiving groove inner wall 121, the receiving groove 12 is defined by the receiving groove inner wall 121, the clamping part 11 is protruded from the receiving groove inner wall 121, the hook part 21 comprises a cantilever 23 and a pawl 24, the cantilever 23 is located in the receiving groove 12, and in the radial direction of the outer disc 1, the cantilever 23 abuts against the clamping part 11.

[0026] In combination Figure 6 and Figure 7 , the hook part 21 comprises a cantilever 23 and a pawl 24, the cantilever 23 extends from the base 22, the pawl 24 extends from the cantilever 23 in the radial direction of the outer disc 1 and is arranged towards the sander center A, because the hook part 21 applies a force to the outer disc 1 radially inward along the sander center A, the outer disc 1 always applies a force to the hook part radially outward along the sander center A, so the outer disc 1 and the wear-resistant element 2 are more tightly clamped.

[0027] Preferably, the wear-resistant element 2 comprises a plurality of hook parts 21, the outer disc 1 comprises a plurality of clamping parts 11, the plurality of hook parts 21 and the plurality of clamping parts 11 are distributed in the circumferential direction of the outer disc 1, and the plurality of hook parts 21 and the plurality of clamping parts 11 correspondingly clamped and matched. The plurality of hook parts 21 are uniformly distributed, and the plurality of clamping parts 11 are uniformly distributed, which facilitates more stable installation of the wear-resistant element 2.

[0028] Preferably, the wear-resistant element 2 is made of soft material, which can be rubber.

[0029] In combination Figure 4 and Figure 5The outer disc 1 comprises a groove portion 13, the wear-resistant element 2 comprises a protruding portion 25, the groove portion 13 is configured to position the protruding portion 25, the groove portion 13 comprises a groove portion inner wall 131, the groove portion inner wall 131 oppositely arranged enclose a containing space to contain the protruding portion 25, the protruding portion 25 cooperates with the groove to position the outer disc 1 and the wear-resistant element 2.

[0030] Preferably, the outer disc 1 comprises a convex rib 14, the convex rib 14 is formed by the groove portion inner wall 131 and protrudes from the groove portion inner wall 131, the convex rib 14 abuts with the outer surface of the protruding portion 25.

[0031] The outer disc 1 and the wear-resistant element 2 of the wall surface polisher 100 are connected by a snap hook, the wear-resistant element 2 comprises a snap hook portion 21, the snap hook portion 21 comprises a convex claw 24, the convex claw 24 extends along the radial direction of the outer disc 1 and is arranged towards the polishing center A. Because the snap hook portion 21 exerts a force on the outer disc 1 along the radial direction of the polishing center A, the outer disc 1 always exerts a force on the snap hook portion along the radial direction of the polishing center A, so that the outer disc 1 and the wear-resistant element 2 are more tightly connected, and are not easy to loosen and fall off, so that the operation is more convenient, and the work efficiency is greatly improved.

[0032] It should be understood that the drawings illustrate the exemplary embodiments by way of example and that it should be understood that the application is not limited by 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 regarded 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. Accordingly, this description is to be construed as illustrative only. The configurations and arrangements depicted in the various exemplary embodiments are provided by way of example only. Although only a few embodiments have been described in detail in this disclosure, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this document. Some elements shown as integrally formed can be constructed of multiple parts or elements, the positions of elements can be reversed or otherwise varied, and the nature or number of elements can be altered or varied. The order or sequence of any process, logical algorithm, or method steps can be varied or re-sequenced without materially affecting the material attributes of the subject matter described in this document. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the various exemplary embodiments without departing from the scope of the present application.

[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 sander, comprising a driving motor, a sander disc, a housing, the driving motor is disposed in the housing and provides power for the sander disc, the sander disc comprises a sander center, the sander comprises an outer disc and a wear-resistant element, the outer disc covers the sander disc, and the wear-resistant element cooperates with the outer disc, characterized in that: the wear-resistant element comprises a hook part, the outer disc comprises a clamping part, the hook part is clamped in the clamping part, and the clamping part is subjected to a force directed to the sander center. The wear-resistant element comprises a base and the hook part extending from the base, the outer disc comprises a receiving groove, the sander comprises a receiving groove inner wall, the receiving groove is defined by the receiving groove inner wall, and the clamping part is protruded from the receiving groove inner wall.

2. The sander of claim 1, wherein: The hook part comprises a cantilever and a lug, the cantilever extends from the base, and the lug extends from the cantilever along a radial direction of the sander center and is arranged towards the sander center.

3. The sander of claim 2, wherein: The cantilever is located in the receiving groove, and in a radial direction of the outer disc, the cantilever abuts against the clamping part.

4. The sander of claim 3, wherein: The wear-resistant element comprises a plurality of hook parts, the outer disc comprises a plurality of clamping parts, the plurality of hook parts and the plurality of clamping parts are distributed along a circumferential direction of the outer disc, and the plurality of hook parts and the plurality of clamping parts are correspondingly clamped and cooperated.

5. The sander of claim 1, wherein: The plurality of hook parts are uniformly distributed, and the plurality of clamping parts are uniformly distributed.

6. The sander of claim 5, wherein: The wear-resistant element is made of soft material.

7. The sander of claim 1, wherein: The outer disc comprises a groove part, and the wear-resistant element comprises a protruding part, the groove part is configured to position the protruding part.

8. The sander of claim 1, wherein: The groove part comprises a groove part inner wall, the groove part inner wall is oppositely arranged to enclose a receiving space to accommodate the protruding part.

9. The sander of claim 8, wherein: The outer disc comprises a convex rib, the convex rib is formed by the groove part inner wall and protrudes from the groove part inner wall.

10. The sander of claim 9, wherein: ​

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