Shield structure of power tool and power tool

Abstract

The utility model provides a shield structure of a power tool and the power tool. The protective cover structure of the power tool comprises a protective cover assembly, the protective cover assembly is used for being arranged on a shell cover in a sleeving mode and can rotate around the shell cover, and the protective cover assembly is provided with a plurality of gear grooves formed at intervals in the circumferential direction of the protective cover assembly; the shell cover is provided with an elastic piece, and the elastic piece can be connected to the gear groove in a clamped mode so that the shield assembly can be positioned at a set angle. According to the power tool, the elastic piece and the protective cover assembly are arranged, and the elastic piece can be clamped to the gear groove of the protective cover assembly so that angle positioning can be conducted on the protective cover assembly. Therefore, when the angle of the protective cover assembly needs to be adjusted, the protective cover assembly is rotated under the action of external force, and the elastic piece is clamped on the gear groove at the next angle position, so that the angle adjustment of the protective cover assembly is realized.

Description

Technical Field

[0001] The present disclosure relates to the field of machinery, and particularly to a shield structure for a power tool and a power tool. Background Art

[0002] An angle grinder is an electric tool for cutting and grinding. Since debris and dust are generated during the operation, and the flying directions of the debris generated during the cutting and grinding processes are different, a shield needs to be installed around the workpiece of the angle grinder to ensure the safety of the operator. However, currently, the shield on the angle grinder is generally fixedly installed on the shell cover through threaded parts. When it is necessary to adjust the angle of the shield relative to the grinding disc, it is necessary to borrow another tool to rotate the threaded parts to release the locking of the shield to the shell cover, then adjust the angle of the shield, and finally tighten the threaded parts to clamp and fix the shield on the shell cover. This method undoubtedly greatly increases the adjustment time and brings inconvenience to the user. Summary of the Utility Model

[0003] The present disclosure provides a shield structure for a power tool and a power tool to at least solve one of the technical problems existing in the prior art.

[0004] According to a first aspect of the present disclosure, there is provided a shield structure for a power tool, including a shield assembly. The shield assembly is used to be sleeved on a shell cover and can rotate around the shell cover. The shield assembly has a plurality of spaced-apart gear slots along its circumferential direction. Among them, a spring piece is provided on the shell cover, and the spring piece can be clamped in the gear slot to position the shield assembly at a set angle.

[0005] In an implementable embodiment, the shell cover is provided with a receiving cavity for receiving the spring piece, and an opening for the spring piece to protrude outward is formed on the receiving cavity.

[0006] In an implementable embodiment, the spring piece includes a bent protruding portion and extending portions bent and extending from both ends of the protruding portion. Both ends of the extending portion are detachably installed in the receiving cavity through a connecting member, and the protruding portion passes through the opening and is clamped in the gear slot.

[0007] In an implementable embodiment, the spring piece has an axisymmetric structure.

[0008] In an implementable embodiment, a step is formed along the circumferential direction at the end of the shell cover. The shield assembly includes a first shield and a second shield that are detachably connected. The first shield is placed on the step through an installation hole formed thereon, so that the first shield drives the second shield to rotate around the shell cover synchronously. Among them, the installation hole is communicated with the gear slot.

[0009] In an implementable embodiment, a protective edge is formed by the edge of the first shield extending downward along its circumferential direction, and the protective edge is disposed outside the shell cover.

[0010] In an implementable embodiment, hooks are provided on the bottom surface of the first shield, and bayonet openings are formed at corresponding positions of the second shield. The first shield is snap-connected to the second shield through the hooks and the bayonet openings.

[0011] In an implementable embodiment, an elastic arm protruding toward the first shield is provided on the side wall of the second shield. When the first shield and the second shield are snap-connected, the elastic arm forms an elastic pressing force on the first shield.

[0012] In an implementable embodiment, a shield pressing plate is further included. The shield pressing plate is disposed on the shield assembly and is fixedly connected to the shell cover through a fixing member, so that the shield pressing plate forms a downward pressing force on the shield assembly.

[0013] According to a second aspect of the present disclosure, a power tool is provided, including the shield structure of the power tool in any implementable embodiment of the first aspect.

[0014] Compared with the prior art, the advantages of the present application are as follows: 1), by providing a spring piece and a shield assembly in the power tool of the present application, the spring piece can be snapped onto the gear slot of the shield assembly to position the angle of the shield assembly. Therefore, when the angle of the shield assembly needs to be adjusted, the shield assembly is rotated under an external force to make the spring piece snap onto the gear slot at the next angle position, thereby realizing the angle adjustment of the shield assembly. 2), with the shield assembly and the spring piece in the power tool of the present application, the user can directly adjust the angle of the shield assembly according to needs without disassembly and assembly, which is convenient, time-saving and labor-saving, and effectively solves the safety problem in the use of the power tool. 3), the power tool of the present application has a simple structure, convenient assembly, and the manufacturing processes of all components are easy to implement, improving the fitting accuracy between components.

[0015] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understandable through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present disclosure will become easily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary and non-limiting manner, wherein:

[0017] In the drawings, the same or corresponding reference numerals represent the same or corresponding parts.

[0018] Figure 1 Shows a schematic structural diagram of a power tool according to an embodiment of the present disclosure;

[0019] Figure 2 Shows a schematic disassembly diagram of a power tool according to an embodiment of the present disclosure;

[0020] Figure 3 Shows a schematic diagram of a partial structure of a power tool according to an embodiment of the present disclosure Figure 1 ;

[0021] Figure 4 Shows a schematic diagram of a partial structure of a power tool according to an embodiment of the present disclosure Figure 2 ;

[0022] Figure 5 Shows Figure 3 the disassembly schematic of Figure 1 ;

[0023] Figure 6 Shows Figure 3 the disassembly schematic of Figure 2 ;

[0024] Figure 7 Shows Figure 3 the explosion schematic of Figure 1 ;

[0025] Figure 8 Shows Figure 3 the explosion schematic of Figure 2 .

[0026] Description of the reference numerals in the figure: 1 - shell cover, 2 - shield assembly, 3 - elastic piece, 4 - connecting piece, 5 - shield pressing plate, 6 - fixing piece, 7 - housing, 8 - output shaft, 9 - working piece, 11 - accommodating cavity, 12 - step, 21 - first shield, 22 - second shield, 31 - protruding portion, 32 - extending portion, 111 - opening, 211 - gear slot, 212 - hook, 213 - protective edge, 214 - mounting hole, 221 - bayonet, 222 - elastic arm. Detailed implementation manners

[0027] To make the objectives, features, and advantages of the present disclosure more obvious and understandable, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0028] According to an embodiment of the present disclosure, the present utility model provides a power tool. As Figures 1-8As shown in the figure, a power tool includes a housing cover 1 and a shield assembly 2. The shield assembly 2 is sleeved on the housing cover 1 and can rotate around the housing cover 1. The shield assembly 2 has a plurality of spaced gear slots 211 along its circumferential direction; a spring piece 3 is provided on the housing cover 1, and the spring piece 3 can be snap-fitted into the gear slot 211 to position the shield assembly 2 at a set angle.

[0029] This application provides a power tool. By providing the spring piece 3 and the shield assembly 2, the spring piece 3 can be snap-fitted into the gear slot 211 of the shield assembly 2 to position the angle of the shield assembly 2. Therefore, when the shield assembly 2 needs to adjust the angle, during the process of rotating the shield assembly 2 under the action of an external force until the gear slot 211 at the next angular position thereon rotates to the position of the spring piece 3, the spring piece 3 is continuously compressed and deformed. Thus, when the gear slot 211 at the next angular position rotates to the position of the spring piece 3, the spring piece 3 loses the extrusion of the shield assembly 2 on it, and the spring piece 3 instantaneously recovers its elastic force and is snap-fitted into the gear slot 211 at the next angular position, enabling the spring piece 3 to achieve positioning and rotation of the shield assembly 2 on the side, thereby realizing the angle adjustment of the shield assembly 2. With the shield assembly 2 and the spring piece 3 of this application, the user can directly adjust the angle of the shield assembly 2 as needed without disassembly and assembly, which is convenient, time-saving and labor-saving, and effectively solves the safety problem in the use of the power tool.

[0030] In this embodiment, the power tool further includes a housing 7 and a power assembly housed in the housing 7; the housing 7 is fixedly connected to the housing cover 1, and the power assembly has an output shaft 8, and one end of the output shaft 8 protrudes from the housing cover 1 and is connected to a workpiece 9. The output shaft 8 is driven to rotate by the power assembly, and then the workpiece 9 is synchronously driven to rotate.

[0031] In this embodiment, the power tool is a angle grinder, and the workpiece is a grinding disc, which is mainly used for cutting, grinding and brushing metals, stones and other materials.

[0032] For example, the cross-section of the gear slot 211 is V-shaped, U-shaped, arc-shaped or other shapes, and specific limitations are not made.

[0033] In this embodiment, a plurality of gear slots 211 are arranged at intervals along the circumferential direction of the shield assembly 2, so that the shield assembly 2 has a plurality of angle adjustment gears, realizing the adjustment of multiple angles of the shield assembly 2. Similarly, the angular interval between adjacent gear slots 211 can also be set as needed, and specific limitations are not made.

[0034] In one embodiment, as Figure 7 shown, the housing cover 1 is provided with a receiving cavity 11 for receiving the spring piece 3, and an opening 111 is provided on the receiving cavity 11 for the spring piece 3 to protrude outward.

[0035] In one embodiment, as Figures 5-7As shown in the figure, the elastic piece 3 includes a bent protruding portion 31 and extending portions 32 formed by bending and extending from both ends of the protruding portion 31. Both ends of the extending portion 32 are detachably mounted in the accommodating cavity 11 through a connecting member 4, and the protruding portion 31 passes through the opening 111 and is clamped in the gear position groove 211.

[0036] For example, the elastic piece 3 is a single-piece structure and is generally strip-shaped. The elastic piece 3 has an axisymmetric structure. The connecting member 4 is a pin shaft, and the pin shaft can be inserted and pulled out of the housing cover 1, so as to fix the extending portion 32 of the elastic piece 3 between the inner wall of the accommodating cavity 11 and the connecting member 4, thereby fixing the elastic piece 3 in the accommodating cavity 11.

[0037] In this embodiment, the protruding portion 31 is generally V-shaped. Such a setting facilitates the deformation of the elastic piece 3, reduces the problem of local stress concentration at the same time, and ensures the service life of the elastic piece 3. In other embodiments, the protruding portion 31 may also be generally in other shapes, such as U-shaped, arc-shaped or other shapes. The material of the elastic piece 3 is metal. Preferably, the elastic piece 3 is formed by bending a steel plate with a certain thickness. With such a setting, when the angle of the shield assembly 2 is adjusted, an external force needs to be used to overcome the elastic force of the elastic piece 3 to rotate the shield assembly 2. When the applied external force is less than the elastic force, the shield assembly 2 is in a locked state. That is, a relatively large torque is required to rotate the shield assembly 2 to the required gear position, avoiding misadjustment of the shield assembly 2; at the same time, the elastic piece 3 maintains the elastic force under multiple uses, ensuring the stability of use.

[0038] In one embodiment, as Figures 1-8 shown, a step 12 is formed on the end of the housing cover 1 along its circumferential direction. The shield assembly 2 includes a first shield 21 and a second shield 22 that are detachably connected. The first shield 21 is placed on the step 12 through the mounting hole 214 opened thereon, so that the first shield 21 drives the second shield 22 to rotate around the housing cover 1 synchronously; wherein the mounting hole 214 communicates with the gear position groove 211. In this embodiment, the shield assembly 2 is a split part composed of the first shield 21 and the second shield 22. Specifically, a step 12 is formed on the end face of the housing cover 1, and an accommodating cavity 11 with an opening is formed on the step 12 of the housing cover 1, and the elastic piece 3 is arranged in the accommodating cavity 11. The first shield 21 is provided with a mounting hole 214 and a plurality of spaced-apart gear position grooves 211 that are arranged along the circumferential direction of the first shield 21 and communicate with the mounting hole 214. The first shield 21 is placed on the step 12 through the mounting hole 214, so that the first shield 21 can rotate around the housing cover 1.

[0039] For example, hooks 212 are provided on the bottom surface of the first shield 21, and bayonets 221 are provided at corresponding positions on the second shield 22. The first shield 21 is snap-connected to the second shield 22 through the hooks 212 and the bayonets 221. Specifically, hooks 212 are formed by extending downward from the bottom surface of the first shield 21, and bayonets 221 are provided on the second shield 22 at positions corresponding to the hooks 212. Therefore, the second shield 22 is snap-fixed on the hooks 212, thereby realizing the snap connection between the first shield 21 and the second shield 22.

[0040] Furthermore, an elastic arm 222 protruding toward the first shield 21 is provided on the side wall of the second shield 22. When the first shield 21 and the second shield 22 are snap-connected, the elastic arm 222 forms an elastic pressing force on the first shield 21 to further snap-fix the first shield and the second shield together. As Figure 4 , Figure 8 shown, the protruding direction of the elastic arm 222 is the same as the opening direction of the hook 212. Thus, when the first shield 21 and the second shield 22 are snap-connected, the arrangement of the elastic arm 222 further fixes the second shield 22 on the first shield 21.

[0041] For example, a protective edge 213 is formed by extending the edge of the first shield 21 downward along its circumferential direction, and the protective edge 213 is provided outside the housing cover 1.

[0042] For example, the first shield 21 can be directly formed by a mold. The one-piece is simple and convenient to manufacture and has a certain strength. The second shield 22 can also be directly formed by a mold, and the two are snap-connected through hooks and bayonets. For example, the second shield 22 is made of plastic. The second shield 22 made of plastic has a certain strength and toughness. Therefore, the elastic arm 222 provided on the second shield 22 has a certain elastic force.

[0043] For example, it can also be that the shield assembly 2 can be an integral structure composed of the first shield 21 and the second shield 22. For example, the shield assembly 2 can be integrally formed by a mold.

[0044] In one embodiment, as Figures 2-3As shown in the figure, the power tool of the present application further includes a shield pressing plate 5. The shield pressing plate 5 is arranged on the shield assembly, and the shield pressing plate 5 is fixedly connected to the housing cover 1 through a fixing member 6, so that the shield pressing plate 5 forms a downward pressing force on the shield assembly. Specifically, the shield pressing plate 5 is placed on the surface of the first shield 21, and the shield pressing plate 5 is fixedly connected to the housing cover 1 through the fixing member 6, so that the shield pressing plate 5 has an appropriate downward pressing force on the first shield 21, thereby enabling the shield pressing plate 5 to limit the up-and-down shaking of the first shield 21. When it is necessary to rotate the shield assembly 2, the first shield 21 can be rotated by borrowing an external force to drive the second shield 22 to rotate synchronously. Among them, the fixing member 6 can be a threaded member such as a screw, a bolt, or a bolt.

[0045] It should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present disclosure, "a plurality" means two or more, unless otherwise specifically defined.

[0046] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present application.

[0047] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] Unless otherwise clearly defined and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", "fixed connection" may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0049] As mentioned above, the above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A shield structure of a power tool, comprising a shield assembly, characterized in that: The shield assembly is used to be sleeved on the shell cover and can rotate around the shell cover. The shield assembly has a plurality of spaced gear slots along its circumferential direction; wherein, a spring piece is provided on the shell cover, and the spring piece can be snapped into the gear slot to position the shield assembly at a set angle.

2. The shield structure of the power tool according to claim 1, wherein: The shell cover is provided with a receiving cavity for receiving the spring piece, and an opening for the spring piece to protrude outwards is formed on the receiving cavity.

3. The shield structure of the power tool according to claim 2, characterized in that: The spring piece includes a bent protruding portion and extending portions bent and extended from both ends of the protruding portion. Both ends of the extending portion are detachably installed in the receiving cavity through a connecting member, and the protruding portion passes through the opening and is snapped into the gear slot.

4. The shield structure of the power tool according to claim 1, wherein: The spring piece has an axisymmetric structure.

5. The shield structure of the power tool according to claim 1, characterized in that: A step is formed on the end of the shell cover along its circumferential direction; the shield assembly includes a first shield and a second shield that are detachably connected. The first shield is placed on the step through a mounting hole formed thereon, so that the first shield drives the second shield to rotate around the shell cover synchronously; wherein, the mounting hole is communicated with the gear slot.

6. The shield structure of the power tool according to claim 5, characterized in that: Hook-shaped protrusions are provided on the bottom surface of the first shield, and bayonet openings are formed at corresponding positions of the second shield. The first shield and the second shield are snap-connected through the hook-shaped protrusions and the bayonet openings.

7. The shield structure of the power tool according to claim 5, characterized in that: Elastic arms protruding towards the first shield are provided on the side wall of the second shield. When the first shield and the second shield are snap-connected, the elastic arms form an elastic pressing force on the first shield.

8. The shield structure of the power tool according to claim 5, characterized in that: A protective edge is formed by the edge of the first shield extending downwards along its circumferential direction, and the protective edge is arranged outside the shell cover.

9. The shield structure of the power tool according to any one of claims 1-8, characterized in that: A shield pressing plate is further included. The shield pressing plate is arranged on the shield assembly and is fixedly connected to the shell cover through a fixing member, so that the shield pressing plate forms a downward pressing force on the shield assembly.

10. A power tool, characterized in that: It includes the shield structure of the power tool according to any one of claims 1-9.

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