Quick-change grinding wheel cover for angle grinder

Abstract

The utility model discloses a quick-change grinding wheel cover for an angle grinder, which comprises a head shell, a front cover fixedly connected with the head shell is arranged on the head shell, an output shaft is arranged between the head shell and the front cover, and a grinding wheel cover body rotationally connected with the front cover is arranged on the outer side of the front cover; the front cover is further provided with a fast pressing limiting piece used for limiting the rotating angle of the grinding wheel cover body, and a reset spring is arranged between the fast pressing limiting piece and the front cover. The output shaft is further provided with a grinding wheel, and the front side and the rear side of the grinding wheel are provided with a front pressing plate and a rear pressing plate respectively. The grinding wheel is clamped between the front pressing plate and the rear pressing plate, and the output shaft drives the grinding wheel to rotate synchronously when rotating. The grinding wheel cover body rotationally connected with the front cover is arranged on the front cover, and the rotating angle of the grinding wheel cover body is limited through the fast pressing limiting piece; the grinding wheel cover body and the front cover are limited through the protrusions, the grinding wheel cover body can be directly separated from the front cover when the grinding wheel cover body rotates to the disassembling position, and disassembling is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of angle grinder technology, specifically relating to a quick-change grinding wheel cover for an angle grinder. Background Technology

[0002] An angle grinder is a commonly used power tool. It includes a main body housing, which often has a grinding wheel cover to protect the operator. The grinding wheel cover is typically fixed to the main body housing using an open clamp and screws. Patent CN112313036B discloses a grinding wheel cover for a power tool. In existing grinding wheel covers, the clamp is always open, and the cover is connected using screws and nuts. When locking the grinding wheel cover to the front cover of the angle grinder, a screwdriver is needed to tighten the screws. When adjusting the grinding wheel cover, it needs to be tightened...

[0003] Loosen the screws, adjust the angle, and then tighten them again. When replacing the grinding wheel cover, you also need to loosen the screws, replace the new grinding wheel cover, and finally tighten the screws again. This operation method is inconvenient for users and provides a poor user experience. Therefore, a quick-change grinding wheel cover for angle grinders needs to be designed to overcome these problems. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by designing a quick-change grinding wheel cover for an angle grinder. The invention features a grinding wheel cover body rotatably connected to the front cover, with a quick-press limiting component restricting the rotation angle of the grinding wheel cover body. The grinding wheel cover body and the front cover are limited by a protrusion, allowing the grinding wheel cover body to detach directly from the front cover when rotated to the disassembly position, making disassembly convenient.

[0005] The objective of this invention is achieved through the following technical solution: a quick-change grinding wheel cover for an angle grinder, comprising a head shell, a front cover fixedly connected to the head shell, an output shaft between the head shell and the front cover, and a grinding wheel cover body rotatably connected to the outer side of the front cover; the front cover also has a quick-press limiting member for limiting the rotation angle of the grinding wheel cover body, and a return spring between the quick-press limiting member and the front cover; the output shaft also has a grinding wheel, and a front pressure plate and a rear pressure plate are respectively provided on the front and rear sides of the grinding wheel; the grinding wheel is clamped between the front pressure plate and the rear pressure plate, and the output shaft rotates to drive the grinding wheel to rotate synchronously.

[0006] Preferably, the output shaft is rotatably connected to the front cover, and the output shaft is provided with a limiting step for mounting the rear pressure plate; the rear pressure plate is mounted on the limiting step, and the output shaft rotates synchronously with the rear pressure plate; the front pressure plate, the rear pressure plate, and the grinding wheel are fixed together by screws.

[0007] By setting a limiting step to prevent the rear pressure plate from rotating relative to the output shaft, and then setting a front pressure plate and a rear pressure plate at the front and rear ends of the grinding wheel respectively, the grinding wheel and the output shaft are fixed more effectively.

[0008] Preferably, a plurality of first fasteners for fixing are provided between the head shell and the front cover, and a guide post is also provided on the front cover. A second fastener for fixing the guide post, the head shell and the front cover is provided between the guide post, the head shell and the front cover. A quick-press limiting member is slidably installed on the guide post, and a grinding wheel cover body is provided on the front cover and rotatably connected thereto. The quick-press limiting member is arranged adjacent to the grinding wheel cover body. An annular clamp is integrally formed thereto on the grinding wheel cover body.

[0009] Preferably, both the first and second fasteners are screws, and the axial length of the second fastener is greater than that of the first fastener; the guide post has a first step, and the guide posts are arranged in pairs; the quick-press limiting member has a pair of waist-shaped holes, and the guide post is inserted into the waist-shaped holes; the quick-press limiting member is fitted onto the first step; the second fastener passes through the waist-shaped hole and extends into the head shell; the thickness of the quick-press limiting member is adapted to the height of the protrusion on the first step.

[0010] Preferably, the annular clamp is provided with a plurality of evenly distributed limiting holes, and the end of the quick-press limiting member is provided with a limiting protrusion. The outer contour of the limiting protrusion is adapted to the outer contour of the limiting hole. When the limiting protrusion is stuck in the limiting hole, the grinding wheel cover body and the front cover remain relatively stationary.

[0011] Preferably, the head shell is provided with a mounting groove for installing a reset spring, and the mounting groove is provided with a reset spring; the quick-pressing limiting member is provided with a toggle part for pushing the reset spring; in the default state, the reset spring is in a compressed state, one end of the reset spring abuts against the bottom of the mounting groove, and the other end of the reset spring is inserted into the toggle part.

[0012] Preferably, the front cover is provided with an annular groove, and a sealing ring is provided in the annular groove; the sealing ring is disposed between the annular groove and the annular clamp.

[0013] Preferably, the front cover has several evenly distributed first protrusions, which are arranged adjacent to the annular groove; the inner wall of the annular clamp has several evenly distributed second protrusions; when the annular clamp is installed on the front cover, the second protrusions are arranged in the annular groove.

[0014] Preferably, a gap is provided between any two of the first protrusions, and the second protrusion can pass through the gap between the two first protrusions.

[0015] By setting guide posts, the quick-press limiter slides relative to the front cover, allowing it to automatically lock the grinding wheel cover body. A protrusion on the guide post inserts into a waist-shaped hole, and a second fastener passes through the guide post and extends into the head shell. This second fastener secures the head shell, front cover, and guide post together, while the quick-press limiter can slide relative to the guide post. The head shell has a mounting groove; when the front cover and head shell are installed together, a protrusion on the front cover's bottom plate partially blocks the mounting groove, preventing the return spring from disengaging. In the default state, the return spring is compressed, pressing against the actuating part of the quick-press limiter. The limiting protrusion on the quick-press limiter then engages in the limiting hole, limiting the grinding wheel cover body's rotation. When the cutting angle changes, the rotation position of the grinding wheel cover body often needs to be adjusted synchronously. First, push and hold the quick-press limiter, then rotate the grinding wheel cover to the desired working angle, and finally release the quick-press limiter. The limiting protrusion on the quick-press limiter will then automatically engage with the limiting hole of the annular clamp under the action of the return spring, thus fixing the grinding wheel cover to the front cover. By using a rubber sealing ring, the grinding wheel cover has damping during rotation, facilitating precise adjustment of its position. When disassembling or assembling the grinding wheel cover, first remove the grinding wheel from the output shaft. The grinding wheel cover body and the front cover have an alignment part. When installing the grinding wheel cover body, align the cover body with the mounting groove. At this time, the second protrusion on the annular clamp is aligned with the gap between the first protrusion, so the annular clamp can be installed into the annular groove. Before installing the annular clamp, press down the quick-press limiter to allow the annular clamp to move. Then rotate the grinding wheel cover body 180 degrees, so that the gap between the second protrusion and the first protrusion is misaligned. Then release the quick-press limiter, and the limit protrusion will lock into the limit hole. After the grinding wheel cover body is installed, the instruction manual is attached. Figure 1 The diagram shows the grinding wheel cover body in place. When it is necessary to disassemble the grinding wheel cover body, press the quick-release limit piece, and then rotate the grinding wheel cover body to align the gap between the second protrusion and the first protrusion. In this way, the grinding wheel cover body can be removed from the annular groove.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The grinding wheel cover body and the annular clamp are integrally formed, which facilitates the assembly of the grinding wheel cover body and the front cover; 2. The angle of the grinding wheel cover body can be easily adjusted and locked by the relative cooperation between the quick-press limiting component and the annular clamp; 3. The grinding wheel cover body and the front cover are detachably connected, and the grinding wheel cover body is locked by the first protrusion on the front cover and the limiting protrusion on the quick-press limiting component, making the connection between the grinding wheel cover body and the front cover more secure. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a perspective view of the concealed grinding wheel cover body of this utility model;

[0019] Figure 3 This is an exploded view of the present invention;

[0020] Figure 4 This is a three-dimensional view of the grinding wheel cover body;

[0021] Figure 5 This is a 3D view of the front cover;

[0022] Figure 6 A three-dimensional view of the quick-pressing limit component;

[0023] The markings in the diagram are: 1. Head shell; 2. Front cover; 3. Output shaft; 31. Limiting step; 4. Grinding wheel cover body; 41. Annular clamp; 42. Limiting hole; 5. Quick-press limiting component; 51. Waist-shaped hole; 52. Limiting protrusion; 53. Actuating part; 6. Return spring; 7. Grinding wheel; 8. Front pressure plate; 9. Rear pressure plate; 10. First fastener; 11. Guide post; 111. First step; 12. Second fastener; 13. Mounting groove; 14. Annular groove; 15. Sealing ring; 16. First protrusion; 17. Second protrusion. Detailed Implementation

[0024] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0025] like Figures 1 to 6 As shown, this embodiment discloses a quick-change grinding wheel cover for an angle grinder, including a head shell 1, a front cover 2 fixedly connected to the head shell 1, an output shaft 3 between the head shell 1 and the front cover 2, and a grinding wheel cover body 4 rotatably connected to the outer side of the front cover 2; the front cover 2 is also provided with a quick-press limiting member 5 for limiting the rotation angle of the grinding wheel cover body 4, and a return spring 6 is provided between the quick-press limiting member 5 and the front cover 2; the output shaft 3 is also provided with a grinding wheel 7, and a front pressure plate 8 and a rear pressure plate 9 are respectively provided on the front and rear sides of the grinding wheel 7; the grinding wheel 7 is clamped between the front pressure plate 8 and the rear pressure plate 9, and the output shaft 3 rotates to drive the grinding wheel 7 to rotate synchronously.

[0026] The output shaft 3 is rotatably connected to the front cover 2. The output shaft 3 is provided with a limiting step 31 for mounting the rear pressure plate 9. The rear pressure plate 9 is mounted on the limiting step 31, and the output shaft 3 rotates synchronously with the rear pressure plate 9. The front pressure plate 8, the rear pressure plate 9, and the grinding wheel 7 are fixed together by screws. A plurality of first fasteners 10 for fixing are provided between the head shell 1 and the front cover 2. A guide post 11 is also inserted on the front cover 2. A second fastener 12 for fixing the guide post 11, the head shell 1, and the front cover 2 is provided between the guide post 11, the head shell 1, and the front cover 2. A quick-press limiting member 5 is slidably mounted on the guide post 11. The front cover 2 is provided with a grinding wheel cover body 4 rotatably connected to it. The quick-press limiting member 5 is arranged adjacent to the grinding wheel cover body 4. The grinding wheel cover body 4 is provided with an annular clamp 41 integrally formed therewith. Both the first fastener 10 and the second fastener 12 are screws, and the axial length of the second fastener 12 is greater than the axial length of the first fastener 10. The guide post 11 has a first step 111, and the guide posts 11 are arranged in pairs. The quick-press limiting member 5 has paired waist-shaped holes 51, and the guide posts 11 are inserted into the waist-shaped holes 51. The quick-press limiting member 5 is fitted onto the first step 111. The second fastener 12 passes through the waist-shaped hole 51 and extends into the head shell 1. The thickness of the quick-press limiting member 5 is adapted to the height of the protrusion on the first step 111. The annular clamp 41 has several evenly distributed limiting holes 42, and the end of the quick-press limiting member 5 has a limiting protrusion 52. The outer contour of the limiting protrusion 52 is adapted to the outer contour of the limiting hole 42. When the limiting protrusion 52 is engaged in the limiting hole 42, the grinding wheel cover body 4 and the front cover 2 remain relatively stationary. The head shell 1 is provided with a mounting groove 13 for installing a reset spring 6, and the mounting groove 13 is provided with a reset spring 6; the quick-pressing limiting member 5 is provided with a toggle part 53 for pushing the reset spring 6; in the default state, the reset spring 6 is in a compressed state, one end of the reset spring 6 abuts against the bottom of the mounting groove 13, and the other end of the reset spring 6 is inserted into the toggle part 53.

[0027] The front cover 2 has an annular groove 14, and a sealing ring 15 is provided inside the annular groove 14; the sealing ring 15 is disposed between the annular groove 14 and the annular clamp 41. The front cover 2 has a plurality of evenly distributed first protrusions 16, which are arranged adjacent to the annular groove 14; the inner wall of the annular clamp 41 has a plurality of evenly distributed second protrusions 17; when the annular clamp 41 is installed on the front cover 2, the second protrusions 17 are disposed inside the annular groove 14. A gap is provided between any two first protrusions 16, and the second protrusions 17 can pass through the gap between the two first protrusions 16.

[0028] The specific operation process of this embodiment is as follows: In the default state, the return spring 6 is in a compressed state. This causes the return spring 6 to press against the actuating part 53 of the quick-press limit member 5. The limiting protrusion 52 on the quick-press limit member 53 then engages in the limiting hole 42, limiting the grinding wheel cover body 4 and preventing it from rotating. When the cutting angle changes, it is often necessary to adjust the rotation position of the grinding wheel cover body 4 synchronously. First, push the quick-press limit member 5 and hold it down. Then, rotate the grinding wheel cover body 4 to the required working angle, and finally release the quick-press limit member 5. Under the action of the return spring 6, the limiting protrusion 52 on the quick-press limit member 5 automatically engages in the limiting hole 42 of the annular clamp 41, thus fixing the grinding wheel cover body 4 to the front cover 2. When disassembling and assembling the grinding wheel cover body 4, first remove the grinding wheel 7 from the output shaft 3. The grinding wheel cover body 4 and the front cover 2 have an alignment part. When installing the grinding wheel cover body 4, the cover body of the grinding wheel cover body 4 is positioned relative to the mounting groove 13. At this time, the second protrusion 17 on the annular clamp 41 is aligned with the gap between the first protrusion 16, so that the annular clamp 41 can be installed into the annular groove 14. Before installing the annular clamp 41, press down the quick-press limiting member 5 to allow the annular clamp 41 to move. Then rotate the grinding wheel cover body 4 180 degrees, so that the gap between the second protrusion 17 and the first protrusion 16 is misaligned. Then release the quick-press limiting member 5, and the limiting protrusion 52 will be locked into the limiting hole 42. After the grinding wheel cover body 4 is installed, the instruction manual is attached. Figure 1 The diagram shows the grinding wheel cover body 4 in place. When it is necessary to disassemble the grinding wheel cover body 4, press the quick-release limit piece 5, and then rotate the grinding wheel cover body 4 to align the gap between the second protrusion 17 and the first protrusion 16. In this way, the grinding wheel cover body 4 can be removed from the annular groove 14.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A quick-change grinding wheel cover for an angle grinder, comprising a head shell (1), a front cover (2) fixedly connected thereto on the head shell (1), and an output shaft (3) between the head shell (1) and the front cover (2), characterized in that, The front cover (2) is provided with a grinding wheel cover body (4) rotatably connected to it; the front cover (2) is also provided with a quick-press limiting member (5) for limiting the rotation angle of the grinding wheel cover body (4), and a return spring (6) is provided between the quick-press limiting member (5) and the front cover (2); the output shaft (3) is also provided with a grinding wheel (7), and the front and rear sides of the grinding wheel (7) are respectively provided with a front pressure plate (8) and a rear pressure plate (9); the grinding wheel (7) is clamped between the front pressure plate (8) and the rear pressure plate (9), and the output shaft (3) drives the grinding wheel (7) to rotate synchronously when it rotates.

2. The quick-change grinding wheel cover for an angle grinder according to claim 1, characterized in that, The output shaft (3) is rotatably connected to the front cover (2). The output shaft (3) is provided with a limiting step (31) for mounting the rear pressure plate (9). The rear pressure plate (9) is mounted on the limiting step (31), and the output shaft (3) rotates synchronously with the rear pressure plate (9). The front pressure plate (8), the rear pressure plate (9), and the grinding wheel (7) are fixed together by screws.

3. The quick-change grinding wheel cover for an angle grinder according to claim 1, characterized in that, A number of first fasteners (10) for fixing are provided between the head shell (1) and the front cover (2). A guide post (11) is also inserted on the front cover (2). A second fastener (12) for fixing the three is provided between the guide post (11), the head shell (1) and the front cover (2). A quick-press limiter (5) is slidably installed on the guide post (11). A grinding wheel cover body (4) is provided on the front cover (2) and rotatedly connected thereto. The quick-press limiter (5) is arranged adjacent to the grinding wheel cover body (4). An annular clamp (41) is integrally formed on the grinding wheel cover body (4).

4. The quick-change grinding wheel cover for an angle grinder according to claim 3, characterized in that, The first fastener (10) and the second fastener (12) are both screws, and the axial length of the second fastener (12) is greater than the axial length of the first fastener (10); the guide post (11) is provided with a first step (111), and the guide posts (11) are arranged in pairs; the quick-press limiting member (5) is provided with a pair of waist-shaped holes (51), and the guide post (11) is inserted into the waist-shaped hole (51); the quick-press limiting member (5) is fitted onto the first step (111); the second fastener (12) is set through the waist-shaped hole (51) and extends into the head shell (1); the thickness of the quick-press limiting member (5) is adapted to the height of the protrusion on the first step (111).

5. The quick-change grinding wheel cover for an angle grinder according to claim 3, characterized in that, The annular clamp (41) is provided with several evenly distributed limiting holes (42), and the end of the quick-press limiting member (5) is provided with a limiting protrusion (52). The outer contour of the limiting protrusion (52) is adapted to the outer contour of the limiting hole (42). When the limiting protrusion (52) is stuck in the limiting hole (42), the grinding wheel cover body (4) and the front cover (2) remain relatively stationary.

6. The quick-change grinding wheel cover for an angle grinder according to claim 3, characterized in that, The head shell (1) is provided with a mounting groove (13) for installing a reset spring (6), and the mounting groove (13) is provided with a reset spring (6); the quick-press limit member (5) is provided with a toggle part (53) for pushing the reset spring (6); in the default state, the reset spring (6) is in a compressed state, one end of the reset spring (6) abuts against the bottom of the mounting groove (13), and the other end of the reset spring (6) is inserted into the toggle part (53).

7. The quick-change grinding wheel cover for an angle grinder according to claim 3, characterized in that, The front cover (2) is provided with an annular groove (14), and a sealing ring (15) is provided in the annular groove (14); the sealing ring (15) is located between the annular groove (14) and the annular clamp (41).

8. The quick-change grinding wheel cover for an angle grinder according to claim 7, characterized in that, The front cover (2) is provided with a plurality of evenly distributed first protrusions (16), the first protrusions (16) being arranged adjacent to the annular groove (14); the inner wall of the annular clamp (41) is provided with a plurality of evenly distributed second protrusions (17); when the annular clamp (41) is installed on the front cover (2), the second protrusions (17) are arranged in the annular groove (14).

9. The quick-change grinding wheel cover for an angle grinder according to claim 8, characterized in that, A gap is provided between any two of the first protrusions (16), and the second protrusion (17) can pass through the gap between the two first protrusions (16).

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