Supporting mechanism for shield, shield assembly and electric tool device

Abstract

The utility model discloses a support mechanism for a shield, which is used for being connected between a shell of an electric tool and the shield and comprises a flange body (1) used for being connected with the shell of the electric tool and provided with a step portion (11) protruding outwards in the radial direction. The step part is used for providing supporting force in the axial direction for the protective cover; the flange cover plate (2) is connected with the flange body, and the flange cover plate is used for being connected with a protective cover of the electric tool; the annular elastic supporting piece (3) is arranged on the step portion of the flange body, and the elastic supporting piece is used for exerting tensioning force on the protective cover in the radial direction and the axial direction in the assembled state.

Description

Technical Field

[0001] The utility model relates to a supporting mechanism, in particular to a supporting mechanism for a power tool shield. Background Art

[0002] Many power tools currently feature guards to protect the operator, prevent dust and debris from entering the tool, and improve work efficiency. Guards are typically mounted on the power tool's housing and positioned around key components, such as rotating and cutting elements, to reduce operating risks and prevent damage.

[0003] In the prior art, the protective cover is often mounted on the housing of the power tool through a flange.

[0004] However, power tools are often subject to significant vibration during operation. A single flange cannot provide axial support for the guard. Consequently, frequent vibrations can easily cause wear at the connection between the guard and flange, making it difficult to secure the guard to the tool and potentially posing a safety risk. Furthermore, the flange is also susceptible to wear during this process, shortening its service life. Frequent replacement of the guard and flange increases product costs and reduces production efficiency. Utility Model Content

[0005] One of the purposes of the present invention is to provide a support mechanism for a shield, which can better provide support for the shield and reduce vibration between the shield and the power tool, thereby reducing wear and tear and increasing service life.

[0006] In order to achieve the above-mentioned object, the present invention proposes a support mechanism for a shield, which is used to be connected between the housing and the shield of the power tool, and the support mechanism includes:

[0007] A flange body, which is used to connect to the housing of the power tool, the flange body having a step portion protruding radially outward, the step portion being used to provide axial support force to the shield;

[0008] a flange cover plate connected to the flange body, the flange cover plate being used to connect to a shield of the power tool;

[0009] An annular elastic support member is provided on the step portion of the flange body. The elastic support member is used to apply tension to the shield in radial and axial directions when in an assembled state.

[0010] Furthermore, in the support mechanism described in the present invention, the elastic support member includes an elastic portion close to the flange body side in the axial direction and a rigid portion close to the flange cover plate side in the axial direction.

[0011] Furthermore, in the support mechanism described in the present invention, the elastic support member is configured as a single element.

[0012] Furthermore, in the support mechanism described in the present invention, the elastic support member is configured as an assembly, and the assembly includes an elastic ring configured as the elastic part and a rigid ring configured as the rigid part, which are separately provided.

[0013] Furthermore, in the support mechanism described in the present invention, the flange body includes a base and a main body extending from the base in the axial direction, the base is used to be connected to the housing of the power tool, the main body is connected to the flange cover, and the step portion protrudes radially outward from the main body.

[0014] Furthermore, in the support mechanism described in the present invention, a plurality of connecting holes are provided on the flange cover plate, and a plurality of connecting members pass through the connecting holes and are connected to the flange body.

[0015] Furthermore, in the support mechanism described in the present invention, the plurality of connection holes are arranged unevenly in the circumferential direction of the flange cover plate.

[0016] Furthermore, in the support mechanism described in the present invention, the circumferential outer edge of the flange cover plate has a flange portion and a recessed portion that are arranged at intervals.

[0017] Furthermore, in the support mechanism described in the present invention, the flange cover is a flange cover made of a first material, and the flange body is a flange body made of a second material, and the wear resistance and / or strength of the first material are greater than those of the second material.

[0018] Another object of the present invention is to provide a shield assembly that can reduce vibration between the shield and the power tool, thereby reducing wear and tear and increasing service life.

[0019] Based on the above-mentioned purpose, the utility model also provides a shield assembly, which is used to be connected to the housing of the power tool, and the shield assembly includes a shield and a support mechanism as described above, wherein the shield is connected to the flange cover; in the assembled state, the elastic support member is tensionedly arranged between the flange body and the shield in both radial and axial directions.

[0020] Furthermore, in the shield assembly described in the present invention, a snap-fit ​​protrusion protruding radially outward is provided on the inner wall of the center hole of the shield, and in the assembled state, the snap-fit ​​protrusion abuts against the axial end face of the flange cover.

[0021] Another object of the present invention is to provide an electric tool that is safe and easy to use.

[0022] Based on the above objectives, the present invention further provides an electric tool device, which includes an electric tool and a shield assembly as described above, wherein the shield assembly is connected to the housing of the electric tool.

[0023] The support mechanism described in this utility model utilizes a separate flange body, flange cover, and elastic support member to provide more stable support for the shield, significantly reducing vibration between the shield and the power tool, thereby reducing wear and increasing service life. Furthermore, the separate structure of the flange body and flange cover allows for the possibility of changing the materials of the flange cover and flange body, further improving the wear resistance of the flange cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the split structure of the support mechanism described in the utility model in one embodiment is shown.

[0025] Figure 2 A schematic diagram showing a state in which the support mechanism of the present invention is assembled on a power tool in one embodiment is shown.

[0026] Figure 3 Shows Figure 2 A partial enlarged view of point A in the middle.

[0027] Figure 4 A schematic diagram showing a state in which the shield assembly of the present invention is assembled on a power tool in one embodiment is shown.

[0028] Figure 5 Shows Figure 4 A partial enlarged view of point B in the middle.

[0029] Figure 6 A schematic structural diagram of an elastic support member in one embodiment of the present invention is shown.

[0030] Figure 7 A structural schematic diagram of a flange cover plate in one embodiment of the present invention is shown.

[0031] Figure 8 The figure shows a state in which the protective cover of the present invention in one embodiment has not yet been assembled to the electric tool.

[0032] Figure 9 The figure shows a state where a protective cover according to one embodiment of the present invention is assembled on a power tool. DETAILED DESCRIPTION

[0033] The support mechanism, shield assembly and electric tool device described in the present invention will be further explained and illustrated below in combination with the drawings in the specification and specific embodiments. However, such explanation and illustration do not constitute an undue limitation on the technical solution of the present invention.

[0034] To protect the safety of power tool operators and prevent dust and debris from entering the tool, many existing power tools often have guards installed around key components. For example, angle grinders often have guards installed around the grinding disc.

[0035] Currently, power tool guards are mounted on the power tool housing via a single flange. However, after installation, there is a large gap between the guard and the flange in the axial direction, resulting in a lack of axial support for the guard. This, combined with the vibrations experienced during power tool operation, can easily cause wear at the connection between the guard and the flange. Furthermore, because the guard material is typically more wear-resistant than the flange material, the contact area between the flange and the guard will also wear, further increasing the axial gap between the flange and the guard, accelerating the wear of both. This can lead to the guard being unable to be stably mounted on the tool and even pose a safety risk.

[0036] In order to solve the above problems, the present invention provides a support mechanism for a shield and a shield assembly in one embodiment.

[0037] Figure 1 A schematic diagram of the split structure of the support mechanism described in the utility model in one embodiment is shown.

[0038] Figure 2 A schematic diagram showing a state in which the support mechanism of the present invention is assembled on a power tool in one embodiment is shown.

[0039] Figure 3 Shows Figure 2 A partial enlarged view of point A in the middle.

[0040] like Figure 1 、 Figure 2 and Figure 3 As shown, in one embodiment, the support mechanism may include:

[0041] A flange body 1, used for connection to the housing of a power tool, has a radially outwardly projecting step 11 with an axially stepped surface 111, thereby providing axial support for the shield. A flange cover plate 2, used for connection to the shield of the power tool, is connected to the flange body 1. An annular elastic support member 3 is provided on the flange body's step 11.

[0042] Figure 4A schematic diagram showing a state in which the shield assembly of the present invention is assembled on a power tool in one embodiment is shown.

[0043] Figure 5 Shows Figure 4 A partial enlarged view of point B in the middle.

[0044] like Figure 4 and Figure 5 As shown, in one embodiment, the shield assembly of the present invention includes a shield 200 and a support mechanism, and the shield 200 is mounted on the housing 100 of the power tool through the support mechanism. The shield 200 is connected to the flange cover 2. When the shield 200 is assembled, as shown in FIG. Figure 5 As shown, first, the stepped portion 11 of the flange body 1 provides axial support to the shield 200 via the elastic support member 3 disposed thereon. This stepped portion 11 also radially supports the bottom end of the neck of the shield 200, thereby preventing radial movement of the shield. Furthermore, the elastic support member 3 is deformed by the axial compressive force, thereby applying an axial tensioning force F1 and a radial tensioning force F2 to the shield 200. This tensioning force significantly reduces vibration between the shield 200 and the power tool, thereby significantly reducing wear.

[0045] Figure 6 An elastic support member according to an embodiment of the present invention is shown.

[0046] In some more specific embodiments, Figure 1 , Figure 3 and Figure 6 As shown, the elastic support member 3 may include an elastic portion 31 on the side close to the flange body 1 in the axial direction and a rigid portion 32 on the side close to the flange cover plate 2 in the axial direction. In this embodiment, considering that the flange cover plate has higher strength and stronger wear resistance, the elastic support member is made of two different materials, wherein the rigid portion 32 on the side close to the flange cover plate 2 is made of a rigid material, such as metal (such as stainless steel) or hard plastic, and the elastic portion 31 on the side close to the flange body can be made of a flexible material, such as rubber or flexible plastic.

[0047] It can be seen that in Figure 6 In the embodiment shown, the elastic support 3 is provided as a single element.

[0048] In addition, in some other embodiments, the elastic support member may also be provided as an assembly, which may include at least two rings, for example, an elastic ring provided as an elastic portion and a rigid ring provided as a rigid portion.

[0049] In some more specific embodiments, Figure 1 As shown, the flange body 1 includes a base 12 and a main body 13 extending axially from the base 12. The base 12 is configured to be connected to the housing of a power tool, for example, by threading the main body 13 through threaded holes 121 provided therein. The main body 13 is connected to the flange cover 2, and the step 11 protrudes radially outward from the main body 13.

[0050] Figure 7 A structural schematic diagram of a flange cover plate in one embodiment of the present invention is shown.

[0051] In some more specific embodiments, Figure 1 and Figure 7 As shown, the flange cover plate 2 is provided with a plurality of connecting holes 23 , and a plurality of connecting members 4 pass through the connecting holes 23 and are connected to the flange body 1 .

[0052] In some more preferred embodiments, the plurality of connection holes 23 are arranged unevenly in the circumferential direction of the flange cover. For example, Figure 7 The angle of α1 is not equal to the angle of α2. This non-uniform arrangement can ensure that the flange cover is in a fixed position relative to the flange body after installation.

[0053] In some more specific embodiments, the connection hole 23 may be a threaded hole, and the connection member 4 may be a bolt or a screw.

[0054] In some more preferred embodiments, the flange cover plate 2 and the flange body 1 can be made of two different materials. The flange cover plate is made of a first material with better wear resistance and / or strength, such as wear-resistant steel or high-strength steel. To control costs, the flange body can be made of a second material with lower wear resistance and / or strength than the first material.

[0055] Of course, in other optional implementations, the flange cover and the flange body may also be made of the same material.

[0056] Figure 8 The figure shows a state in which the protective cover of the present invention in one embodiment has not yet been assembled to the electric tool.

[0057] Figure 9 The figure shows a state where a protective cover according to one embodiment of the present invention is assembled on a power tool.

[0058] like Figure 7 and Figure 8As shown, in some more specific embodiments, the inner wall of the central hole of the shield 200 is provided with a radially outwardly protruding snap-fitting protrusion 201, and the circumferential outer edge of the flange cover 2 has a flange portion 22 and a recessed portion 21 spaced apart. When the shield 200 is installed in the axial direction, the recessed portion 21 cooperates with the snap-fitting protrusion 201 to provide a guide for the installation of the shield 200 in the axial direction.

[0059] like Figure 9 As shown, when the shield 200 is assembled in place in the axial direction, the shield 200 is rotated in the circumferential direction so that it is rotated relative to the flange cover plate 2 by a certain angle, so that the upper surface of the snap-fit ​​protrusion 201 is snapped onto the lower surface of the flange portion 22 of the flange cover plate, that is, the snap-fit ​​protrusion rests on the axial end face of the flange cover plate, thereby realizing the connection between the shield 200 and the flange cover plate, and at the same time, the lower surface of the snap-fit ​​protrusion 201 rests on the rigid portion of the elastic support member, thereby obtaining stable axial support.

[0060] The support mechanism and shield assembly described in the utility model provide more stable support for the shield in the axial and radial directions by adopting a separately arranged flange main body, flange cover plate and elastic support member, and greatly reduce the vibration between the shield and the power tool, thereby reducing wear and improving the service life of the shield and flange.

[0061] In addition, the uniform deformation of the elastic support also reduces the resistance when changing the angle position of the shield, thereby improving the user experience.

[0062] In a more preferred embodiment, the flange cover plate is made of a first material with higher strength and better wear resistance, so that a higher contact strength can be achieved while controlling costs, reducing the wear of the flange cover plate during operation to achieve a longer service life.

[0063] In a preferred embodiment, the elastic support member includes a rigid part made of metal material or other material that is not easily deformed and an elastic part made of flexible material, which can ensure that the rigid part in contact with the shield has better contact strength. At the same time, the elastic part can produce uniform deformation during the cooperation process with the shield, thereby generating uniform axial and radial tension support force on the shield.

[0064] In one embodiment, the present invention further provides an electric tool device, which includes an electric tool and the above-mentioned shield assembly mounted on a housing of the electric tool.

[0065] In some more specific embodiments, the power tool can be, for example, an angle grinder, a circular saw, or an electric drill, which drives the tool to rotate when the output shaft rotates around its own axis under the action of the motor, thereby performing processing operations on the workpiece, such as grinding, cutting, and drilling.

[0066] Since the present invention does not improve other components of the power tool, they will not be described in detail here.

[0067] It should be noted that the existing technology in the scope of protection of the present utility model is not limited to the embodiments given in the present utility model documents. All existing technologies that do not contradict the solutions of the present utility model, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the scope of protection of the present utility model.

[0068] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0069] It should also be noted that the above-listed embodiments are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above-listed embodiments, and similar variations or modifications that can be directly derived from or easily conceived by those skilled in the art based on the disclosure of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A support mechanism for a shield, which is used to connect between the housing and the shield of an electric tool, characterized in that: The supporting mechanism comprises: A flange body (1) is used for connecting to a housing of an electric tool, the flange body having a step portion (11) protruding radially outward, the step portion being used to provide an axial supporting force to the shield; A flange cover plate (2) connected to the flange body, the flange cover plate being used to be connected to a shield of the electric tool; An annular elastic support member (3) is arranged on the step portion of the flange body and is used to apply tension to the shield in radial and axial directions when in an assembled state.

2. The support mechanism according to claim 1, wherein: The elastic support member comprises an elastic portion (31) close to one side of the flange body in the axial direction and a rigid portion (32) close to one side of the flange cover plate in the axial direction.

3. The support mechanism according to claim 2, wherein: The elastic support member is provided as a single element; or the elastic support member is provided as an assembly, wherein the assembly includes an elastic ring provided as the elastic portion and a rigid ring provided as the rigid portion, which are separately provided.

4. The support mechanism according to claim 1, wherein: The flange body comprises a base (12) and a main body (13) extending from the base in an axial direction, wherein the base is used to be connected to a housing of an electric tool, the main body is connected to the flange cover, and the step portion protrudes radially outward from the main body.

5. The support mechanism according to claim 1, wherein: The flange cover plate is provided with a plurality of connection holes (23), and a plurality of connection pieces pass through the connection holes and are connected to the flange body.

6. The support mechanism according to claim 5, wherein: The plurality of connection holes are unevenly distributed in the circumferential direction of the flange cover plate.

7. The support mechanism according to claim 1, wherein: The circumferential outer edge of the flange cover plate has a flange portion (22) and a recessed portion (21) that are arranged at intervals.

8. The support mechanism according to claim 1, wherein: The flange cover plate is made of a first material, and the flange body is made of a second material. The wear resistance and / or strength of the first material are greater than those of the second material.

9. A shield assembly for connecting to a housing of an electric tool, characterized in that: The shield assembly includes a shield (200) and a support mechanism as described in any one of claims 1 to 8, wherein the shield is connected to the flange cover; in the assembled state, the elastic support member is tensionedly arranged between the flange body and the shield in both radial and axial directions.

10. The shield assembly according to claim 9, wherein: A snap-fitting protrusion (201) protruding radially outward is provided on the inner wall of the central hole of the shield. In the assembled state, the snap-fitting protrusion abuts against the axial end surface of the flange cover.

11. A power tool device comprising a power tool, characterized in that: The electric tool device further comprises a shield assembly according to claim 9 or 10, wherein the shield assembly is connected to a housing (100) of the electric tool.

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