Angle grinder quick-release grinding wheel cover with self-locking function

Abstract

The angle grinder quick-release grinding wheel cover with the self-locking function comprises a head shell and a grinding wheel cover body, a front cover is fixedly connected to the head shell, and the front cover is composed of an upper layer structure and a lower layer structure; wherein the front cover upper layer is provided with a plurality of clamping grooves, the front cover lower layer is provided with an annular limiting groove, the front cover upper layer is further provided with a set of guide grooves communicated with the annular limiting groove, the grinding wheel cover is provided with an opening end used for being connected with the head shell, and the inner wall of the opening end is provided with a set of limiting blocks matched with the guide grooves. The limiting block extends into the annular limiting groove through the guide groove, and the limiting block can move in the annular limiting groove, so that the angle of the grinding wheel cover relative to the head shell is adjusted, and a lock catch piece is arranged at the position, close to the opening end, of the grinding wheel cover. The grinding wheel cover can be subjected to rapid and continuous angle adjustment relative to the head shell, and the design of the lock catch piece and the buckle head of the lock catch piece ensures that the grinding wheel cover can be firmly locked after any angle adjustment.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a quick-release grinding wheel cover for an angle grinder with a self-locking function. Background Technology

[0002] Angle grinders, as a common handheld power tool, are widely used for grinding and polishing metal surfaces. Their main components include the head housing, grinding wheel, wheel cover, and handle. The wheel cover, as a critical safety feature, primarily prevents injury from flying debris during high-speed rotation, and also provides important protection for the operator.

[0003] However, in practical applications, due to the varying shapes of different workpieces and different processing requirements, it is often necessary to adjust the angle of the grinding wheel cover relative to the machine housing to adapt to various working scenarios. Traditional angle grinder grinding wheel covers are usually fixed to the machine housing using a clamp structure and fastening bolts. When the angle of the grinding wheel cover needs to be adjusted, the user usually needs to use tools to loosen or completely remove the clamp, manually adjust the position of the grinding wheel cover, and then retighten the clamp. This process is not only time-consuming and laborious, but frequent operations can also lead to wear on the fasteners, affecting the overall service life of the equipment. Although some existing designs can achieve quick disassembly of the grinding wheel cover, they cannot meet the user's need for continuous and flexible adjustment of the grinding wheel cover position according to specific usage requirements, which to some extent limits the application range of the angle grinder and reduces work efficiency. Utility Model Content

[0004] This invention aims to solve the problems existing in the prior art by providing a quick-release grinding wheel cover for angle grinders with a self-locking function for rapid angle adjustment and ensuring its secure locking.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This quick-release grinding wheel cover for an angle grinder with self-locking function includes a head shell and a grinding wheel cover. A front cover is fixedly connected to the head shell. The front cover consists of an upper and lower layer structure. The upper layer of the front cover has multiple slots, and the lower layer of the front cover has an annular limiting groove. The upper layer of the front cover also has a set of guide grooves communicating with the annular limiting groove. The grinding wheel cover has an open end for connecting with the head shell. A set of limiting blocks matching the guide groove is provided on the inner wall of the open end. The limiting blocks extend into the annular limiting groove through the guide groove, and the limiting blocks can move in the annular limiting groove, so that the angle of the grinding wheel cover relative to the head shell can be adjusted. A locking element is provided near the open end of the grinding wheel cover. The locking element has a buckle that is movably inserted into the open end. The buckle can be reset and rotated around the connection between the locking element and the grinding wheel cover, so that the buckle can extend into the slot in the open end and engage with it, thus locking the grinding wheel cover and the head shell.

[0006] Preferably, the open end has a tubular structure and consists of two layers. The upper layer of the open end has a through hole, and the locking fastener drives the buckle to move through the through hole and engage with the slot. A set of limiting blocks is installed on the lower layer of the open end.

[0007] Preferably, a set of the limiting blocks includes at least two, and the two limiting blocks have different structural dimensions. At least two guide grooves are also provided for cooperating with the limiting blocks respectively.

[0008] Preferably, the grinding wheel cover has a bottom wall, the open end is disposed on the bottom wall, a first connecting hole is provided on the bottom wall, the front end of the locking member is provided with a connecting part, a second connecting hole is provided in the connecting part, a rivet is provided on the second connecting hole, and the rivet passes through the second connecting hole and the first connecting hole from bottom to top and is then riveted to the bottom wall.

[0009] Preferably, a spacer sleeve is provided between the first connecting hole and the second connecting hole, and the rivet passes through the first connecting hole, the spacer sleeve and the second connecting hole in sequence, so that there is a height difference between the connecting part and the bottom wall.

[0010] Preferably, the lower surface of the bottom wall is provided with a first fixing part and a spring disposed on the first fixing part, and the locking member is provided with a second fixing part, the second fixing part being located behind the buckle, the left end of the spring being connected to the first fixing part, and the right end of the spring being connected to the second fixing part.

[0011] Preferably, the rear end of the locking member has a limiting stop, which is located on the side of the buckle and extends along the height direction of the opening end. The limiting stop is movable and abuts against the outer wall of the opening end.

[0012] Preferably, the buckle has a pair of locking blocks arranged in a U-shape. When the buckle is inserted into the through hole, the pair of locking blocks engage with a pair of adjacent slots on the upper layer of the front cover.

[0013] Preferably, the depth of the guide groove is greater than the depth of the annular limiting groove.

[0014] Preferably, the head shell has two pairs of threaded holes symmetrically arranged, and the front cover has two pairs of through holes correspondingly arranged. A screw is installed in each through hole, and the screw passes through the through hole and connects with the threaded hole.

[0015] The beneficial effects of this utility model are:

[0016] 1. The design of the limiting block and guide groove allows the grinding wheel cover to be adjusted quickly and continuously relative to the head shell. Users can easily adjust the angle without the aid of tools, which greatly improves the convenience of operation and work efficiency. The locking parts and buckle design ensure that the grinding wheel cover can be firmly locked after any angle adjustment, avoiding the displacement of the grinding wheel cover due to accidental collision or vibration. This not only enhances the safety of the angle grinder, but also ensures the stability during use.

[0017] 2. A set of limit blocks contains at least two blocks, with different structural dimensions. Combined with multiple guide grooves, it provides the possibility of multi-point fixing, achieves more precise angle adjustment, and improves positioning accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a quick-release grinding wheel cover for an angle grinder with a self-locking function according to this utility model;

[0019] Figure 2 This is an exploded view of a quick-release grinding wheel cover for an angle grinder with a self-locking function, according to this utility model.

[0020] Figure 3 This is a schematic diagram of the front cover structure;

[0021] Figure 4 This is a top view of the grinding wheel cover;

[0022] Figure 5 This is a 3D view of the grinding wheel cover;

[0023] Figure 6 This is a bottom view of the grinding wheel cover;

[0024] Figure 7 This is a structural diagram of the locking mechanism.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Head shell; 100. Front cover; 101. Slot; 102. Annular limiting groove; 103. Guide groove; 104. Threaded hole; 105. Through hole; 106. Screw;

[0027] 2. Grinding wheel cover; 200. Open end; 201. Limiting block; 202. Locking fastener; 203. Buckle; 204. Through hole; 205. Guide mark; 206. Bottom wall; 207. First connecting hole; 208. Connecting part; 209. Second connecting hole; 210. Rivet; 211. Spacer sleeve; 212. First fixing part; 213. Second fixing part; 214. Limiting stop; 215. Locking block; 216. Spring. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] like Figures 1 to 7 As shown, a quick-release grinding wheel cover for an angle grinder with a self-locking function includes a head shell 1 and a grinding wheel cover 2. A front cover 100 is fixedly connected to the head shell 1. The front cover 100 consists of an upper and lower layer structure. The upper layer of the front cover 100 has multiple slots 101, and the lower layer of the front cover 100 has an annular limiting groove 102. The upper layer of the front cover 100 also has a set of guide grooves 103 communicating with the annular limiting grooves 102. The grinding wheel cover 2 has an opening end 200 for connecting with the head shell 1. The inner wall of the opening end 200 is provided with a set of limiting blocks 201 that match the guide grooves 103. 201 extends into the annular limiting groove 102 through the guide groove 103, and the limiting block 201 can move in the annular limiting groove 102, so that the angle of the grinding wheel cover 2 relative to the head shell 1 can be adjusted. A locking member 202 is provided at the position of the grinding wheel cover 2 near the opening end 200. The locking member 202 has a buckle 203 that is movably inserted into the opening end 200. The buckle 203 can be reset and rotated around the connection between the locking member 202 and the grinding wheel cover 2, so that the buckle 203 can extend into the slot 101 in the opening end 200 and engage with it, thus completing the locking of the grinding wheel cover 2 and the head shell 1.

[0030] A front cover 100 is bolted to the head shell 1. The front cover 100 consists of two layers. In this embodiment, the upper layer of the front cover 100 has multiple slots 101, while the lower layer has an annular limiting groove 102. A set of guide grooves 103 communicating with the annular limiting groove 102 are also provided on the upper layer of the front cover 100. The grinding wheel cover 2 is connected to the head shell 1 through its open end 200. A set of limiting blocks 201 are provided on the inner wall of the open end 200. These limiting blocks 201 match the guide grooves 103 and can extend along the guide grooves 103 into the annular limiting grooves 102, moving freely within the annular limiting grooves 102, thereby achieving the relative movement of the grinding wheel cover 2 with respect to the head shell 1. To ensure the grinding wheel cover 2 can be securely locked after continuous angle adjustment, a locking element 202 is provided near the opening end 200 of the grinding wheel cover 2. The locking element 202 is equipped with a buckle 203 that is movably inserted into the opening end 200. The buckle 203 can be reset and rotated around the connection between the locking element 202 and the grinding wheel cover 2, so that the buckle 203 can accurately extend into the slot 101 in the opening end 200 and engage with it, thus completing the reliable locking of the grinding wheel cover 2 and the head shell 1. This not only greatly improves the convenience and flexibility of the angle adjustment of the grinding wheel cover 2, but also ensures the safety and stability of operation through a reliable self-locking mechanism, significantly improving work efficiency and user experience.

[0031] Specifically, such as Figures 4 to 7 As shown, the open end 200 has a tubular structure and consists of two layers. The upper layer of the open end 200 has a through hole 204. The locking fastener 202 drives the buckle 203 to move through the through hole 204 and engage with the slot 101. A set of limit blocks 201 are installed on the lower layer of the open end 200.

[0032] The open end 200 is designed as a tubular structure consisting of two layers. This double-layer design enhances the overall strength and stability of the open end 200. The upper layer of the open end 200 has a through hole 204 for the buckle 203 of the locking component 202 to move through and engage with the slot 101 on the front cover 100. The lower layer of the open end 200 is equipped with a set of limiting blocks 201. These limiting blocks 201 move along the guide groove 103 to the annular limiting groove 102, thereby allowing the grinding wheel cover 2 to be adjusted relative to the head shell 1 at an angle, ensuring the stability of operation.

[0033] Furthermore, such as Figure 4 , Figure 5 and Figure 7 As shown, a set of limiting blocks 201 includes at least two, and the two limiting blocks 201 have different structural dimensions. There are also at least two guide grooves 103, which are used to cooperate with the limiting blocks 201 respectively.

[0034] In this embodiment, there are three limiting blocks 201, and two of the limiting blocks 201 have different structural dimensions. At the same time, three guide grooves 103 are also provided to cooperate with these limiting blocks 201 respectively. By using limiting blocks 201 of different sizes and corresponding guide grooves 103, it is ensured that the grinding wheel cover 2 can achieve more accurate positioning and stable locking when adjusting the angle. The limiting blocks 201 of different sizes can provide multiple fixing points in the annular limiting groove, which increases the accuracy of angle adjustment.

[0035] Specifically, such as Figures 4 to 7 As shown, the grinding wheel cover 2 has a bottom wall 206, an open end 200 is provided on the bottom wall 206, a first connecting hole 207 is provided on the bottom wall 206, a connecting part 208 is provided at the front end of the locking member 202, a second connecting hole 209 is provided in the connecting part 208, a rivet 210 is provided on the second connecting hole 209, and the rivet 210 is riveted to the bottom wall 206 after passing through the second connecting hole 209 and the first connecting hole 207 from bottom to top.

[0036] The rivet 210 passes through the second connecting hole 209 and the first connecting hole 207 from bottom to top and is then riveted to the bottom wall 206, thus realizing the connection between the locking fastener 202 and the grinding wheel cover 2. This connection method ensures that the buckle 203 can be reset and rotated around the connection between the locking fastener 202 and the grinding wheel cover 2, and the locking fastener 202 will not loosen or fall off during use.

[0037] Furthermore, such as Figure 2 , Figure 6 and Figure 7 As shown, a spacer sleeve 211 is provided between the first connecting hole 207 and the second connecting hole 209. The rivet 210 passes through the first connecting hole 207, the spacer sleeve 211 and the second connecting hole 209 in sequence, so that there is a height difference between the connecting part 208 and the bottom wall 206.

[0038] To ensure an appropriate height difference between the connecting part 208 and the bottom wall 206, a spacer sleeve 211 is provided between the first connecting hole 207 and the second connecting hole 209. The rivet 210 passes through the first connecting hole 207, the spacer sleeve 211 and the second connecting hole 209 in sequence, which strengthens the stability of the connection. In addition, by setting a height difference, direct friction between components is avoided, reducing the risk of wear.

[0039] Furthermore, such as Figure 6 and Figure 7 As shown, the lower surface of the bottom wall 206 is provided with a first fixing part 212 and a spring 216 provided on the first fixing part 212. The locking member 202 is provided with a second fixing part 213, which is located behind the buckle head 203. The left end of the spring 216 is connected to the first fixing part 212, and the right end of the spring 216 is connected to the second fixing part 213.

[0040] The lower surface of the bottom wall 206 is provided with a first fixing part 212, and a spring 216 is installed on this fixing part. The locking member 202 is provided with a second fixing part 213 located behind the buckle 203. One end of the spring 216 is connected to the first fixing part 212, and the other end is connected to the second fixing part 213, forming a reset mechanism. When it is necessary to adjust the angle of the grinding wheel cover 2, the buckle 203 is forced to leave the slot 101. After the external force is released, the spring 216 automatically pushes the buckle 203 back to its original position, completing the locking.

[0041] Furthermore, such as Figure 6 and Figure 7 As shown, the rear end of the locking fastener 202 has a limiting stop 214, which is located on the side of the buckle 203 and extends along the height direction of the opening end 200. The limiting stop 214 movably abuts against the outer wall of the opening end 200.

[0042] The rear end of the fastener 202 is provided with a limiting stop 214. The limiting stop 214 is located on the side of the buckle 203 and extends along the height direction of the opening end 200. The limiting stop 214 moves against the outer wall of the opening end 200 to prevent the fastener 202 from rotating or shifting excessively and to ensure that it maintains the correct position during operation.

[0043] Specifically, such as Figure 3 and Figure 7 As shown, the buckle 203 has a pair of locking blocks 215, which are arranged in a U-shape. When the buckle 203 extends into the through hole 204, the pair of locking blocks 215 respectively engage with a pair of adjacent slots 101 on the upper layer of the front cover 100.

[0044] The buckle 203 is designed with a pair of locking blocks 215. The pair of locking blocks 215 are arranged in a U-shape. When the buckle 203 is inserted into the through hole 204 of the opening end 200, the pair of locking blocks 215 can be precisely engaged with the pair of adjacent slots 101 on the upper layer of the front cover 100. This not only ensures the stable locking of the grinding wheel cover 2 after the angle is adjusted, but also increases the contact area and stability during engagement through the U-shaped structure, reducing the risk of accidental unlocking caused by the vibration of the grinder or other external forces.

[0045] Furthermore, such as Figure 3 As shown, the depth of the guide groove 103 is greater than the depth of the annular limiting groove 102.

[0046] The depth of the guide groove 103 is designed to be greater than the depth of the annular limiting groove 102. This design detail aims to optimize the movement path of the limiting block 201 in the guide groove 103 and ensure that the limiting block 201 can maintain a good positioning effect after entering the annular limiting groove 102. Increasing the depth of the guide groove 103 helps to reduce the frictional resistance of the limiting block 201 during movement, making the angle adjustment smoother. In addition, this depth difference can also prevent the limiting block 201 from coming out of the annular limiting groove 102 when rotating at high speed or being impacted, thus enhancing the stability of the overall structure.

[0047] Specifically, such as Figure 4 As shown, the grinding wheel cover is provided with a guide mark 205, which is located on the outside of the opening end and is used to guide the limiting block into the guide groove.

[0048] The grinding wheel cover 2 is provided with a guide mark 205, which is located on the outside of the opening end. The guide mark 205 is used to guide the limiting block to enter the guide groove accurately, so as to help the operator quickly and accurately align the limiting block and insert it into the guide groove when adjusting the angle of the grinding wheel cover 2.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A quick release disc cover with self-locking function for angle grinder, comprising a head shell (1) and a disc cover (2), characterized in that: A front cover (100) is fixedly connected to the head shell (1), and the front cover (100) is composed of an upper and lower two-layer structure; The front cover (100) has multiple slots (101) on its upper layer and an annular limiting groove (102) on its lower layer. The upper layer of the front cover (100) also has a set of guide grooves (103) communicating with the annular limiting groove (102). The grinding wheel cover (2) has an opening (200) for connection with the head shell (1). A set of limiting blocks (201) matching the guide grooves (103) are provided on the inner wall of the opening (200). The limiting blocks (201) extend into the annular limiting grooves (102) through the guide grooves (103), and the limiting blocks (201) can... The grinding wheel cover (2) can move in the annular limiting groove (102) so that the angle of the grinding wheel cover (2) relative to the head shell (1) can be adjusted. A locking member (202) is provided at the position of the grinding wheel cover (2) near the opening end (200). The locking member (202) has a buckle (203) that can be inserted into the opening end (200). The buckle (203) can be reset and rotated around the connection between the locking member (202) and the grinding wheel cover (2) so that the buckle (203) can be inserted into the slot (101) in the opening end (200) and engaged with it, thus completing the locking of the grinding wheel cover (2) and the head shell (1).

2. The quick release disc cover of angle grinder with self-locking function according to claim 1, characterized in that: The opening end (200) has a tubular structure and is composed of two layers. The upper layer of the opening end (200) has a through hole (204). The locking fastener (202) drives the buckle (203) to move through the through hole (204) and engage with the slot (101). A set of limiting blocks (201) is installed on the lower layer of the opening end (200).

3. The quick release disc cover of angle grinder with self-locking function according to claim 2, characterized in that: A set of the limiting blocks (201) includes at least two, and the two limiting blocks (201) have different structural dimensions. There are also at least two guide grooves (103) for cooperating with the limiting blocks (201) respectively.

4. The quick release disc cover of angle grinder with self-locking function according to claim 1, characterized in that: The grinding wheel cover (2) has a bottom wall (206), the opening end (200) is provided on the bottom wall (206), the bottom wall (206) is provided with a first connecting hole (207), the front end of the locking member (202) is provided with a connecting part (208), the connecting part (208) is provided with a second connecting hole (209), the second connecting hole (209) is provided with a rivet (210), the rivet (210) passes through the second connecting hole (209) and the first connecting hole (207) from bottom to top and is then riveted to the bottom wall (206).

5. The quick release disc cover of angle grinder with self-locking function according to claim 4, characterized in that: A spacer sleeve (211) is provided between the first connecting hole (207) and the second connecting hole (209). The rivet (210) passes through the first connecting hole (207), the spacer sleeve (211) and the second connecting hole (209) in sequence, so that there is a height difference between the connecting part (208) and the bottom wall (206).

6. The quick release disc cover of angle grinder with self-locking function according to claim 5, characterized in that: The lower surface of the bottom wall (206) is provided with a first fixing part (212) and a spring (216) provided on the first fixing part (212). The locking member (202) is provided with a second fixing part (213). The second fixing part (213) is located behind the buckle (203). The left end of the spring (216) is connected to the first fixing part (212), and the right end of the spring (216) is connected to the second fixing part (213).

7. The quick release disc cover of angle grinder with self-locking function according to claim 4, characterized in that: The rear end of the locking member (202) has a limiting stop (214), which is located on the side of the buckle (203) and extends along the height direction of the opening end (200). The limiting stop (214) is movable against the outer wall of the opening end (200).

8. The quick release disc cover of angle grinder with self-locking function according to claim 1, characterized in that: The buckle (203) has a pair of locking blocks (215), which are arranged in a U-shape. When the buckle (203) extends into the through hole (204), the pair of locking blocks (215) respectively engage with a pair of adjacent slots (101) on the upper layer of the front cover (100).

9. The quick release disc cover of angle grinder with self-locking function according to claim 8, characterized in that: The depth of the guide groove (103) is greater than the depth of the annular limiting groove (102).

10. The quick release disc cover of angle grinder with self-locking function according to claim 3, characterized in that: The grinding wheel cover is provided with a guide mark (205), which is located on the outside of the opening end to guide the limiting block into the guide groove.

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