Tool accessory and electric tool

Abstract

A tool attachment for a tool, comprising a gripping element, a connecting element and a locking element, the locking element locking the gripping element to the connecting element, the connecting element configured to secure the connecting element to the tool, the gripping element comprising a first mating portion, the connecting element comprising a second mating portion, when the holding element is locked to the connecting element, the first matching part is meshed with the second matching part, and the holding element transmits acting force through the locking element, the first matching part and the second matching part.

Description

Technical Field

[0001] The utility model relates to the field of tools, in particular to a tool accessory and an electric tool. Background Art

[0002] The auxiliary handle of an electric tool generally includes a handle and a clamping mechanism for clamping the electric tool. The clamping mechanism and the handle are fixedly connected by a locking member. When the auxiliary handle is used, the electric tool generates vibrations during operation and transmits them to the handle. Frequent vibrations can loosen the handle and the clamping mechanism, generate radial shear force, and cause relative slippage between the handle and the clamping mechanism. The locking member is bent or broken by the force, causing the handle to detach from the electric tool, creating a huge safety hazard, greatly affecting work efficiency, and causing great trouble to users. Utility Model Content

[0003] The purpose of this application is to overcome the shortcomings of the prior art, to provide a concave-convex structure at the connection between the clamping mechanism and the handle to transmit the force, and to provide a safer and more convenient tool accessory. The utility model is achieved through the following technical solutions:

[0004] A tool accessory for a tool, comprising a gripping element, a connecting element and a locking element, wherein the locking element locks the gripping element to the connecting element, and the connecting element is configured to fix the connecting element to the tool; the gripping element comprises a first mating portion, and the connecting element comprises a second mating portion, when the gripping element is locked to the connecting element, the first mating portion engages with the second mating portion, and the gripping element transmits a force through the locking element, the first mating portion and the second mating portion.

[0005] Further, the first matching portion is a concave portion / convex portion, and the second matching portion is a convex portion / concave portion that can match with the first matching portion.

[0006] Furthermore, the concave portion is an annular groove, the convex portion is an annular protrusion, and the annular groove and the annular protrusion are engaged with each other to transmit the force.

[0007] Furthermore, the holding element is provided with an internal thread that cooperates with the locking element, the annular groove surrounds the internal thread, and the locking element rotates to lock the holding element and the connecting element.

[0008] Furthermore, the distance between the annular groove and the annular protrusion is no more than 0.2 mm.

[0009] Furthermore, the difference between the inner diameter and the outer diameter of the annular groove is not less than 0.5 mm.

[0010] Furthermore, in another embodiment, the concave portion is a cylindrical concave hole, and the convex portion is a cylindrical protrusion.

[0011] Furthermore, the tool accessory includes a clamping mechanism, and the clamping mechanism includes a clamping ring, and the clamping ring is sleeved on the tool.

[0012] Furthermore, the clamping mechanism includes a main body and a depth limiting portion, and the depth limiting portion is adjustably mounted on the main body and configured to limit the working position of the tool.

[0013] An electric tool comprises a housing, a motor and a working mechanism accommodated in the housing, and any one of the tool accessories described above.

[0014] The tool accessory is provided with a concave-convex structure at the connection between the connecting element and the holding element, and the force is transmitted through the annular groove and the annular protrusion. The concave-convex structure engages with each other to solve the slippage problem, bears radial shear force to prevent the locking element from breaking, and provides buffering for the vibration generated by the power tool, providing a safer and more convenient tool accessory, greatly improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional diagram of an electric tool according to an embodiment of the present application.

[0016] Figure 2 This is a three-dimensional view of a tool accessory according to an embodiment of the present application.

[0017] Figure 3 for Figure 2 A cutaway view of the tool attachment is shown.

[0018] Figure 4 for Figure 2 A cross-sectional view of a connecting element of a tool attachment is shown.

[0019] Figure 5 for Figure 2 A cross-sectional view of a gripping element of a tool attachment is shown. DETAILED DESCRIPTION

[0020] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.

[0021] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one. "Multiple" or "several" means two and more than two. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for convenience of explanation and are not limited to one position or one spatial orientation. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the 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" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0022] Combination Figures 1 to 5 , an electric tool, comprising a housing, a motor and a working mechanism (not shown) accommodated in the housing, the electric tool comprising a tool accessory 100, the tool accessory 100 comprising a gripping element 1, a connecting element 2 and a locking element 3, the locking element 3 locking the gripping element 1 to the connecting element 2, the connecting element 2 being configured to fix the connecting element 2 to the tool; the gripping element 1 comprising a first matching portion 11, the connecting element 2 comprising a second matching portion 21, when the gripping element 1 is locked to the connecting element 2, the first matching portion 11 is engaged with the second matching portion 21, the gripping element 1 transmits a force through the locking element, the first matching portion 11 and the second matching portion 21. The first matching portion 11 is a concave / convex portion, the second matching portion 21 is a convex / concave portion that can be matched with the first matching portion 11. The gripping element 1 is provided with an internal thread 31 matched with the locking element 3, the annular groove 110 surrounds the internal thread 31, the locking element 3 rotates to lock the gripping element 1 and the connecting element 2.

[0023] Preferably, the concave portion is an annular groove 110, and the convex portion is an annular protrusion 210, and the annular groove 110 and the annular protrusion 210 are engaged with each other to transmit the force. The distance between the annular groove 110 and the annular protrusion 210 is not greater than 0.2 mm, so as to better transmit the force; the difference A between the inner diameter and the outer diameter of the annular groove 110 is not less than 0.5 mm, and the height H of the annular protrusion 210 is greater than 0.2 cm and less than 0.5 cm, so as to prevent the tool from slipping when working.

[0024] Preferably, the tool accessory 100 comprises a clamping mechanism 4, the clamping mechanism 4 comprises a clamping ring 41, the clamping ring 41 is sleeved on the tool, the clamping mechanism 4 comprises a body and a depth limiting portion 42, the depth limiting portion 42 is adjustably mounted on the body and configured to limit the working position of the tool.

[0025] In another embodiment, the recess is a cylindrical recess (not shown), and the projection is a cylindrical protrusion (not shown). The cylindrical recess and the cylindrical protrusion engage with each other to transmit the force, bear the radial shear force to prevent the locking element 3 from breaking, and provide a buffer for the vibration generated by the power tool.

[0026] The tool accessory 100 is provided with a concave-convex structure at the connection between the connecting element 2 and the holding element 1, and the force is transmitted through the annular groove 110 and the annular protrusion 210. The concave-convex structure engages with each other to solve the slippage problem, bears radial shear force to prevent the locking element 3 from breaking, and provides buffering for the vibration generated by the power tool, providing a safer and more convenient tool accessory 100, which greatly improves work efficiency.

[0027] It should be understood that the drawings illustrate exemplary embodiments in detail, and it should be understood that the present 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 as limiting.

[0028] In view of this specification, further modifications and alternative embodiments of various aspects of the present invention will be obvious to those skilled in the art. Therefore, this description should be interpreted as being illustrative only. The configurations and arrangements shown in various exemplary embodiments are illustrative only. Although only some embodiments are described in detail in this disclosure, many modifications (e.g., variations in the size, dimensions, structure, shape and proportion of various elements, the value of parameters, the installation arrangement, the use of materials, colors, orientations, etc.) can be made without substantially departing from the novel teachings and advantages of the subject matter described herein. Some elements shown as being integrally formed can be constructed of multiple parts or elements, the position of the elements can be reversed or otherwise changed, and the nature or number or position of discrete elements can be changed or varied. According to alternative embodiments, the order or sequence of any process, logical algorithm or method steps can be changed or reordered. Other replacements, modifications, changes and omissions can also be made to the design, operating conditions and arrangements of various exemplary embodiments without departing from the scope of the present invention.

[0029] Although the current application describes a specific combination of features in the appended claims, various embodiments of the present invention are directed to any combination of any of the features described herein, regardless of whether such a combination is 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.

[0030] In various exemplary embodiments, relative dimensions, including angles, lengths, and radii, as shown in the drawings are drawn to scale. Actual measurements of the drawings will disclose the relative dimensions, angles, and ratios of the various exemplary embodiments. The various exemplary embodiments extend to various ranges around absolute and relative dimensions, angles, and ratios that can be determined from the drawings. The various exemplary embodiments include any combination of one or more relative dimensions or angles that can be determined from the drawings. In addition, actual dimensions that are not explicitly stated in this specification can be determined by using the ratios of the dimensions measured in the drawings in conjunction with the explicit dimensions stated in this specification.

Claims

1. A tool accessory for a tool, comprising a gripping element, a connecting element and a locking element, wherein the locking element locks the gripping element to the connecting element, and the connecting element is configured to fix the connecting element to the tool, characterized in that: The holding element includes a first matching portion, and the connecting element includes a second matching portion. When the holding element is locked to the connecting element, the first matching portion engages with the second matching portion, and the holding element transmits force through the locking element, the first matching portion, and the second matching portion.

2. The tool attachment according to claim 1, characterized in that: The first matching portion is a concave portion / convex portion, and the second matching portion is a convex portion / concave portion that can match with the first matching portion.

3. The tool attachment according to claim 2, characterized in that: The concave portion is an annular groove, and the convex portion is an annular protrusion.

4. The tool attachment according to claim 3, characterized in that: The holding element is provided with an internal thread matched with the locking element, and the annular groove surrounds the internal thread.

5. The tool attachment according to claim 4, characterized in that: The distance between the annular groove and the annular protrusion is no more than 0.2 mm.

6. The tool attachment according to claim 4, characterized in that: The difference between the inner diameter and the outer diameter of the annular groove is not less than 0.5 mm.

7. The tool attachment according to claim 2, characterized in that: The concave portion is a cylindrical concave hole, and the convex portion is a cylindrical protrusion.

8. The tool attachment according to claim 4, characterized in that: The tool accessory comprises a clamping mechanism, and the clamping mechanism comprises a clamping ring, and the clamping ring is sleeved on the tool.

9. The tool attachment according to claim 8, characterized in that: The clamping mechanism includes a body and a depth limiting portion, wherein the depth limiting portion is adjustably mounted on the body and configured to limit a working position of the tool.

10. An electric tool, comprising a housing, a motor and a working mechanism contained in the housing, characterized in that: The electric tool comprises the tool accessory according to any one of claims 1 to 9.

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