Protective cover assembly of angle grinder and angle grinder

Abstract

The utility model relates to a protective cover assembly of an angle grinder and the angle grinder, and the protective cover assembly of the angle grinder comprises an output shell which is provided with an output opening for an output shaft of the angle grinder to extend out; the semi-open protective cover is used for exposing part of the structure of the abrasive disc and is rotationally connected with the output shell, and when the protective cover is adjusted to rotate, the protective cover and the output shell are switched between a clamping state and a rotating state; the rotary adjusting assembly is arranged between the output shell and the protective cover; when the clamping state and the rotating state are switched, the protective cover rotates relative to the output shell, and the rotation adjusting assembly is movably arranged on the output shell. And the rotating central axis of the protective cover is parallel to the rotating central axis of the output shaft. According to the protective cover assembly, when a user needs different cutting angles, angle adjustment of the protective cover can be achieved without tools, operation of the user is facilitated, and machining efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a protective cover assembly for an angle grinder and an angle grinder. Background Technology

[0002] Grinding tools are widely used power tools, primarily for grinding, polishing, and cutting. During grinding, the resulting shavings can fly and cause injury to the user, especially when cutting hard objects. In some cases, the grinding disc can even be damaged and fly towards the user, creating a safety hazard. Therefore, to prevent such accidents, a protective cover is often installed around the grinding disc of the tool. The outer end of this cover is completely open, allowing grinding to be performed using the unprotected portion of the grinding disc.

[0003] However, the relevant technology has at least one of the following technical problems: users need to use tools and remove and install bolts to adjust the angle of the protective cover, which is inconvenient. Utility Model Content

[0004] Therefore, it is necessary to address the aforementioned technical problems in the existing technology by providing a protective cover assembly for an angle grinder and an angle grinder that allows users to adjust the angle of the protective cover without tools when different cutting angles are required, thus facilitating user operation and improving processing efficiency.

[0005] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0006] A protective cover assembly for an angle grinder includes:

[0007] The output housing is provided with an output opening for the output shaft of the angle grinder to extend out;

[0008] A semi-open protective cover that exposes part of the structure of the grinding disc is rotatably connected to the output housing, and when the protective cover is rotated, the protective cover and the output housing switch between a locked state and a rotating state.

[0009] A rotary adjustment assembly is located between the output housing and the protective cover;

[0010] When switching between the locked state and the rotating state, the protective cover rotates relative to the output housing, and the rotation adjustment component is moved and set on the output housing.

[0011] The rotation center axis of the protective cover is parallel to the rotation center axis of the output shaft.

[0012] In one feasible implementation, when the protective cover and the output housing switch from the engaged state to the rotating state, the rotation adjustment component moves away from the protective cover, and when the protective cover and the output housing switch from the rotating state to the engaged state, the rotation adjustment component moves towards the protective cover.

[0013] In one feasible implementation, the direction of movement of the rotation adjustment component is perpendicular to the plane of rotation of the protective cover.

[0014] In one feasible implementation, the protective cover has multiple through holes spaced apart from each other on the top plane near the output housing;

[0015] The rotary adjustment assembly includes an adjustment member, which has a head that mates with a through hole;

[0016] In the engaged state, the head engages with the through hole; in the rotating state, the head abuts against the bottom of the protective cover.

[0017] In one feasible implementation, the head is an arc-shaped protrusion that extends from the adjustment component toward the protective cover.

[0018] In one feasible implementation, the adjustment element includes a body extending from the head toward the direction away from the protective cover, the cross-sectional width of the body being greater than the diameter of the through hole.

[0019] In one feasible implementation, the rotation adjustment assembly includes an elastic element that provides elasticity for the head to engage with the through-hole.

[0020] In one feasible implementation, there are two rotation adjustment components, symmetrically arranged on opposite sides of the output shaft.

[0021] In one feasible implementation, the output housing is provided with a mounting groove, and the adjusting member and the elastic member are located in the mounting groove, with the adjusting member being closer to the protective cover than the elastic member.

[0022] In one feasible implementation, the protective cover assembly also includes a pressure plate located on the side of the protective cover away from the output housing and fixedly connected to the output housing.

[0023] In one feasible implementation, the projections of the tablet and the protective cover along the axial direction of the output shaft at least partially overlap.

[0024] In one feasible implementation, the protective cover assembly also includes a limiting structure located between the output housing and the protective cover, which limits the rotation angle of the protective cover relative to the output housing.

[0025] In one feasible implementation, the protective cover is provided with a mating hole for connection with the output housing, and the limiting structure includes:

[0026] The first limiting component is located inside the mating hole;

[0027] The second limiting component is located on the outer surface of the output housing;

[0028] The second limiting component works in conjunction with the first limiting component to limit the rotation angle of the protective cover relative to the output housing.

[0029] In one feasible implementation, the first limiting component is a protruding structure that extends radially on the protective cover, and the second limiting component is a groove structure that is recessed radially inward on the outer surface of the output housing, with the protruding structure moving within the groove structure.

[0030] To solve the above technical problems, the technical solution adopted by this utility model is as follows:

[0031] An angle grinder includes: a protective cover assembly as described above;

[0032] The output shaft assembly includes an output shaft and a grinding disc that extend into the protective cover assembly, with the output shaft and grinding disc being fixedly connected.

[0033] Due to the adoption of the above technical solutions, this utility model has the following advantages compared with the prior art:

[0034] 1. The protective cover assembly of the angle grinder of this utility model can realize tool-free adjustment of the protective cover angle. That is, when the user needs different cutting angles, the protective cover angle can be adjusted without tools, which is convenient for the user to operate and improves processing efficiency.

[0035] 2. The rotating adjustment component of the protective cover assembly of the angle grinder of this utility model occupies little space and does not require the addition of too many other parts, which is conducive to processing and production and reduces costs;

[0036] 3. The protective cover assembly of the angle grinder of this utility model includes a pressure plate for pressing down on the protective cover to prevent it from falling off when the angle grinder is held upside down, thus preventing safety hazards. Attached Figure Description

[0037] Figure 1 This is a structural schematic diagram of the protective shield assembly;

[0038] Figure 2 This is a side view of the protective shield assembly;

[0039] Figure 3 Cross-section of the protective shield assembly Figure 1 ;

[0040] Figure 4 Cross-section of the protective shield assembly Figure 2 ;

[0041] Figure 5Top view of the protective cover assembly after removing the grinding and pressing plates;

[0042] Figure 6 This is a schematic diagram of the protective cover.

[0043] Figure 7 This is a schematic diagram of the internal structure of the output housing;

[0044] Figure 8 This is a schematic diagram of the locking mechanism.

[0045] Wherein: 10, output housing; 20, output shaft; 30, protective cover; 31, through hole; 40, rotation adjustment assembly; 41, adjustment component; 42, elastic component; 50, pressure plate; 60, limiting structure; 61, first limiting component; 62, second limiting component; 70, grinding plate; 80, output shaft locking assembly; 81, button; 82, locking component; 821, first hole; 822, second hole; 83, reset elastic component. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0047] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," "up," "down," and similar expressions used in this document are for illustrative purposes only.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In this application, " / " means "or".

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0050] The present invention will be described in detail below with reference to specific embodiments.

[0051] In existing technologies, the protective cover 30 is often a semi-open grinding cover, which exposes part of the structure of the grinding disc 70. In other words, the grinding disc 70 includes, for example, a first grinding part and a second grinding part. The first grinding part is housed within the protective cover 30, while the second grinding part is exposed outside the protective cover 30. During operation, the second grinding part is often responsible for grinding the workpiece. Since the first grinding part is housed within the protective cover 30, to prevent damage to the grinding disc 70 or the scattering of workpiece debris that could injure the operator during operation, the processing opening of the protective cover 30 is often positioned facing the workpiece. When the operator holds the angle grinder handle, they are positioned on the rear side of the protective cover 30 away from the processing opening, thus minimizing the risk of accidents during processing.

[0052] However, since the protective cover 30 and the output housing 10 are fixedly connected, the rotation angle of the protective cover 30 relative to the output housing 10 cannot be adjusted, or the angle of the protective cover 30 can only be adjusted by disassembling and reassembling the connection between the two. On the one hand, this reduces the processing efficiency of the angle grinder, and on the other hand, the disassembly and assembly process is cumbersome and can easily damage the structure of the angle grinder.

[0053] Therefore, the applicant proposes this technical solution, which utilizes a rotary adjustment component 40 to allow the protective cover 30 to rotate directly relative to the output housing 10 without the need for additional tools. Specifically, it enables the protective cover 30 to rotate around the axis of the output shaft 20, thereby creating different angles between the processing openings of the output housing 10 and the protective cover 30. Furthermore, considering actual processing conditions, depending on the operator's handling habits of the angle grinder or the specific processing requirements of the workpiece, the operator can adjust the rotation angle of the protective cover 30 relative to the output housing 10 as needed to improve overall processing efficiency.

[0054] like Figure 1-8 As shown, the protective cover assembly for an angle grinder provided in this embodiment includes an output housing 10, a protective cover 30, and a rotation adjustment assembly 40.

[0055] The output housing 10 has an output opening for the output shaft 20 of a power tool, such as an angle grinder, to extend out. The protective cover 30 is rotatably connected to the output housing 10 and is a semi-open structure that exposes part of the structure of the grinding disc 70. When the protective cover 30 is rotated, the protective cover 30 and the output housing 10 switch between a locked state and a rotating state. The rotation adjustment component 40 is located between the output housing 10 and the protective cover 30. When switching between the locked state and the rotating state, the protective cover 30 rotates relative to the output housing 10, and the rotation adjustment component 40 is movably mounted on the output housing 10. The rotation center axis of the protective cover 30 is parallel to the rotation center axis of the output shaft 20.

[0056] The rotational resistance experienced by the rotating protective cover 30 in the engaged state is greater than that in the rotating state. The difference in rotational resistance when switching between the engaged and rotating states allows the operator to determine whether the protective cover 30 is properly installed. This prevents the protective cover 30 from rotating during construction work, which could lead to it failing to effectively block flying debris and compromise operator safety.

[0057] In this embodiment, when the protective cover 30 and the output housing 10 switch from the engaged state to the rotating state, the rotation adjustment component 40 moves away from the protective cover 30. When the protective cover 30 and the output housing 10 switch from the rotating state to the engaged state, the rotation adjustment component 40 moves towards the protective cover 30.

[0058] In one specific embodiment, the direction of movement of the rotation adjustment component 40 is perpendicular to the rotation plane of the protective cover 30.

[0059] In this embodiment, the protective cover 30 has a plurality of through holes 31 spaced apart from each other on the top plane near the output housing 10; the rotation adjustment assembly 40 includes an adjustment member 41, which has a head that cooperates with the through holes 31; wherein, in the engaged state, the head engages with the through holes 31, and in the rotating state, the head abuts against the bottom of the protective cover 30.

[0060] To reduce the effort required for rotation during state switching, this embodiment features an arc-shaped protrusion at the head of the adjusting member 41, extending from the adjusting member 41 towards the protective cover 30. This arc-shaped protrusion facilitates sliding into the through hole 31 during the engaged state, sliding out of the through hole 31 during state switching, and moving at the bottom of the protective cover 30. In this embodiment, the cross-sectional width of the side of the arc-shaped protrusion furthest from the protective cover 30 can be greater than or equal to the diameter of the through hole 31.

[0061] In this embodiment, the adjusting member 41 also includes a body extending from the head away from the protective cover 30, the cross-sectional width of the body being greater than the diameter of the through hole 31, to prevent the adjusting member 41 from completely dislodging from the through hole 31.

[0062] In this embodiment, the rotary adjustment assembly 40 includes an elastic element 42, which provides elastic force for the head to engage with the through hole 31. Specifically, in the transition state, when the protective cover 30 is rotated, the head of the adjustment element 41 is squeezed out of the through hole 31 by the bottom of the protective cover 30, and the head of the adjustment element 41 presses against the bottom of the protective cover 30. The elastic element 42 is pressed down by the adjustment element 41 and is in a contracted state. When rotated to the engaged state, the head of the adjustment element 41 slides into the through hole 31 under the restoring force of the elastic element 42, completing the engaged state, thus realizing the self-locking of the protective cover 30.

[0063] In this embodiment, the output housing 10 is provided with a mounting groove, the adjusting member 41 and the elastic member 42 are disposed in the mounting groove, and the adjusting member 41 is closer to the protective cover 30 than the elastic member 42.

[0064] In this embodiment, in order to make the engagement state more stable, two rotation adjustment components 40 are provided, symmetrically arranged on opposite sides of the output shaft 20.

[0065] In this embodiment, in order to prevent the protective cover 30 from falling off when the angle grinder is held upside down, thus causing a safety hazard, the protective cover assembly also includes a pressure plate 50. The pressure plate 50 is located on the side of the protective cover 30 away from the output housing 10 and is fixedly connected to the output housing 10 by screws.

[0066] In this embodiment, the projections of the pressure plate 50 and the protective cover 30 along the axial direction of the output shaft 20 at least partially overlap. More preferably, the pressure plate 50 completely covers the through hole 31 on the protective cover 30, further protecting the rotation adjustment assembly 40.

[0067] In this embodiment, the protective cover assembly further includes a limiting structure 60, which is disposed between the output housing 10 and the protective cover 30. The limiting structure 60 is used to limit the rotation angle of the protective cover 30 relative to the output housing 10.

[0068] In this embodiment, the protective cover 30 is provided with a mating hole for connection with the output housing 10. The limiting structure 60 includes: a first limiting member 61 disposed in the mating hole; and a second limiting member 62 disposed on the outer surface of the output housing 10. The second limiting member 62 cooperates with the first limiting member 61 to limit the rotation angle of the protective cover 30 relative to the output housing 10. Specifically, the first limiting member 61 is a protruding structure disposed on the protective cover 30 and extending radially, and the second limiting member 62 is a groove structure disposed on the outer surface of the output housing 10 and recessed radially inward. The protruding structure is movably disposed within the groove structure.

[0069] In this embodiment, the groove structure is located between the two rotating adjustment components 40, and the movement angle of the protruding structure within the groove structure is less than or equal to 180 degrees.

[0070] This embodiment also provides an angle grinder. The angle grinder includes a protective cover assembly and an output shaft assembly as described in the above embodiment. The output shaft assembly has an output shaft 20 extending into the protective cover assembly and a grinding disc 70, and the output shaft 20 is fixedly connected to the grinding disc 70.

[0071] In this embodiment, the output housing 10 is further provided with an output shaft locking assembly 80 for locking the relative position of the output shaft 20. Specifically, the output shaft locking assembly 80 includes a button 81, a locking member 82, and a reset elastic member 83. The locking member 82 has a first hole 821 in its middle portion, through which the output shaft 20 passes. One end of the button 81 is connected to one end of the locking member 82, and the other end passes through the output housing 10 and is located outside the output housing 10. One end of the reset elastic member 83 is connected to the other end of the locking member 82, and the other end is located on the inner side of the output housing 10. The locking member 82 is also provided with a second hole 822 extending from the first hole 821 toward the button 81. The output shaft 20 is provided with a locking portion, specifically, the locking portion is recessed into the output shaft 20. The second hole 822 cooperates with the locking portion to restrict the rotation of the output shaft 20. When performing a specific locking operation, pressing button 81 pushes the locking member 82 to move, causing the output shaft 20 to separate from the first hole 821 and enter the second hole 822. The second hole 822 cooperates with the engaging part to restrict the rotation of the output shaft 20. When button 81 is released, the locking member 82 moves under the restoring force of the reset elastic member 83, and the output shaft 20 separates from the second hole 822 and enters the first hole 821, completing the unlocking.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A protective cover assembly for an angle grinder, characterized in that, include: The output housing (10) is provided with an output opening for the output shaft (20) of the angle grinder to extend out; A semi-open protective cover (30) that exposes part of the structure of the grinding disc (70) is rotatably connected to the output housing (10), and when the protective cover (30) is rotated, the protective cover (30) and the output housing (10) switch between a locked state and a rotating state; A rotary adjustment assembly (40) is disposed between the output housing (10) and the protective cover (30); When switching between the engaging state and the rotating state, the protective cover (30) rotates relative to the output housing (10), and the rotation adjustment component (40) is moved and disposed on the output housing (10); The rotation center axis of the protective cover (30) is parallel to the rotation center axis of the output shaft (20).

2. The protective cover assembly according to claim 1, characterized in that, When the protective cover (30) and the output housing (10) switch from the engaged state to the rotating state, the rotation adjustment component (40) moves away from the protective cover (30). When the protective cover (30) and the output housing (10) switch from the rotating state to the engaged state, the rotation adjustment component (40) moves towards the protective cover (30).

3. The protective cover assembly according to claim 2, characterized in that, The direction of movement of the rotation adjustment component (40) is perpendicular to the rotation plane of the protective cover (30).

4. The protective cover assembly according to claim 1, characterized in that, The protective cover (30) has a plurality of through holes (31) spaced apart from each other on the top plane near the output housing (10). The rotary adjustment assembly (40) includes an adjustment member (41), which has a head that mates with the through hole (31); In the engaged state, the head engages with the through hole (31), and in the rotating state, the head abuts against the bottom of the protective cover (30).

5. The protective cover assembly according to claim 4, characterized in that, The head is an arc-shaped protrusion, which protrudes from the adjusting member (41) toward the protective cover (30).

6. The protective cover assembly according to claim 4, characterized in that, The adjusting member (41) includes a body extending from the head toward the protective cover (30), the cross-sectional width of the body being greater than the diameter of the through hole (31).

7. The protective cover assembly according to claim 6, characterized in that, The rotation adjustment assembly (40) includes an elastic element (42) that provides elasticity for the head to engage with the through hole (31).

8. The protective cover assembly according to claim 7, characterized in that, There are two rotary adjustment components (40), which are symmetrically arranged on opposite sides of the output shaft (20); The output housing (10) is provided with a mounting groove, the adjusting member (41) and the elastic member (42) are provided in the mounting groove, and the adjusting member (41) is closer to the protective cover (30) than the elastic member (42).

9. The protective cover assembly according to claim 1, characterized in that, The protective cover assembly also includes a pressure plate (50), which is located on the side of the protective cover (30) away from the output housing (10) and is fixedly connected to the output housing (10); The projections of the pressure plate (50) and the protective cover (30) along the axial direction of the output shaft (20) at least partially overlap; The protective cover assembly also includes a limiting structure (60), which is disposed between the output housing (10) and the protective cover (30). The limiting structure (60) is used to limit the rotation angle of the protective cover (30) relative to the output housing (10). The protective cover (30) is provided with a mating hole for fitting and connecting with the output housing (10), and the limiting structure (60) includes: The first limiting component (61) is disposed in the mating hole; The second limiting component (62) is provided on the outer surface of the output housing (10); The second limiting component (62) cooperates with the first limiting component (61) to limit the rotation angle of the protective cover (30) relative to the output housing (10); The first limiting component (61) is a protruding structure that is provided on the protective cover (30) and extends radially, and the second limiting component (62) is a groove structure that is provided on the outer surface of the output housing (10) and recessed radially inward, and the protruding structure is movably provided in the groove structure.

10. An angle grinder, characterized in that, include: The protective shield assembly as described in any one of claims 1-9; The output shaft assembly is provided with an output shaft (20) and a grinding disc (70) extending into the protective cover assembly, wherein the output shaft (20) and the grinding disc (70) are fixedly connected.

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