Mechanism for preventing abrasive disc or cutting disc from falling off after sudden stop of angle grinder

Abstract

The utility model provides a mechanism for preventing an abrasive disc or a cutting disc from falling off after sudden stop of an angle grinder, which comprises an output shaft, an eccentric anti-falling limiting piece and a limiting screw, the eccentric anti-falling limiting piece is positioned on the top end face of a shaft body, the output shaft comprises the shaft body, an external thread is arranged on the outer surface of the shaft body, and a limiting groove is formed in the middle of the top end face of the shaft body; an eccentric anti-falling limiting piece is placed in the limiting groove, the depth of the limiting groove is slightly larger than the thickness of the eccentric anti-falling limiting piece, and the width of the limiting groove is slightly larger than the width of the eccentric anti-falling limiting piece; the eccentric anti-falling limiting piece is matched with the limiting screw, when the center of the eccentric anti-falling limiting piece is located at the center of the output shaft, the inner flange can be installed on the output shaft body, the piece body assembly and the outer flange can be arranged on the surface of the inner flange, and when the center of the eccentric anti-falling limiting piece moves to the limit position away from the center of the output shaft, the outer flange can be installed on the outer flange. Longitudinal limiting of the outer flange can be achieved, the abrasive disc or the cutting disc is prevented from falling off from the output shaft, and use safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of angle grinder technology, and more specifically, to a mechanism for preventing the grinding disc or cutting disc from falling off after an angle grinder has been stopped suddenly. Background Technology

[0002] An angle grinder is an electric tool used for grinding weld beads, removing welding defects, and cleaning weld roots. Angle grinders offer advantages such as high speed, fast defect removal, and clean, aesthetically pleasing welds. They are available in various sizes based on the diameter of the grinding discs used, including 100mm, 115mm, 125mm, 150mm, 180mm, and 230mm. Angle grinders can be stopped using either an emergency stop or a non-emergency stop. In addition to grinding discs, angle grinders can also be fitted with cutting discs, allowing for selection based on specific needs. However, the following limitations exist in its use:

[0003] When the angle grinder comes to an abrupt stop, the grinding or cutting disc will quickly stop rotating. However, when the grinding or cutting disc is rotating at high speed, the outer flange on the angle grinder may loosen and fall off due to inertial force after the abrupt stop, causing the grinding or cutting disc to fall off. In the actual grinding or cutting operation environment, this poses a certain safety hazard and is not conducive to actual use.

[0004] Therefore, there is an urgent need for a mechanism to prevent the grinding or cutting discs from falling off after an emergency stop of an angle grinder to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the issue that when an angle grinder comes to an abrupt stop, the grinding or cutting disc will quickly stop rotating. However, during high-speed rotation, the grinding or cutting disc may loosen and fall off due to inertia after the abrupt stop, causing the grinding or cutting disc to fall off. This poses a safety hazard in actual grinding or cutting operations and is not conducive to practical use.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mechanism is provided to prevent the grinding or cutting disc from falling off after an emergency stop of an angle grinder, thereby improving the aforementioned problem.

[0008] The application is as follows:

[0009] A mechanism for preventing grinding or cutting discs from falling off after an emergency stop of an angle grinder includes an output shaft, an eccentric anti-detachment limiting plate located on the top end face of the shaft body, and a limiting screw. The output shaft includes a shaft body with an external thread on its outer surface. A limiting groove is formed in the middle of the top end face of the shaft body, and the eccentric anti-detachment limiting plate is placed inside the limiting groove. The depth of the limiting groove is slightly greater than the thickness of the eccentric anti-detachment limiting plate, and the width of the limiting groove is slightly greater than the width of the eccentric anti-detachment limiting plate. A screw hole is provided at the center of the top end face of the shaft body, with a distance of approximately 10mm from the bottom of the screw hole to the bottom surface of the limiting groove on the output shaft, for installing the limiting screw. An eccentric slot is formed on the eccentric anti-detachment limiting plate, and the width of the eccentric slot is slightly greater than the outer diameter of the thread of the limiting screw. The distance is approximately 1.15 times the pitch of the external thread. The maximum dimension of the length end face of the eccentric anti-detachment limiting plate is smaller than the thread root diameter of the external thread. When the eccentric anti-detachment limiting plate moves to the eccentric limit position, the distance from its end face away from the center of the output shaft to the center of the output shaft is greater than the radius of the outer diameter of the external thread. The eccentric anti-detachment limiting plate can move within the limiting groove. A limiting screw is provided inside the eccentric groove. The limiting screw includes a screw body and a screw cap. The screw body is threaded into the threaded hole at the center of the top end face of the shaft body, and the thread length is approximately 10mm. The lower end face of the screw cap contacts the top end face of the shaft body. An inner flange is sleeved on the shaft body. A plate assembly is provided on the upper surface of the inner flange. An outer flange is provided on the upper surface of the plate assembly.

[0010] As a preferred technical solution of this application, the plate assembly includes a grinding plate located between the inner flange and the outer flange, the grinding plate having an installation opening, and the outer flange located within the installation opening.

[0011] As a preferred technical solution of this application, the sheet assembly includes a cutting disc located between the inner flange and the outer flange, and the upper and lower end faces of the cutting disc are respectively attached to the outer flange and the inner flange.

[0012] As a preferred technical solution of this application, the outer surface of the eccentric anti-detachment limiting piece is in contact with the inner surface of the limiting groove.

[0013] As a preferred technical solution of this application, the limiting screw is inserted into the eccentric slot of the eccentric anti-loosening limiting piece.

[0014] As a preferred technical solution of this application, the limiting screw is screwed into the threaded hole at the center of the top end face of the shaft through the screw body thread.

[0015] As a preferred technical solution of this application, the shaft is connected to the external flange thread by external thread.

[0016] As a preferred technical solution of this application, the inner flange is sleeved and installed on the shaft.

[0017] As a preferred technical solution of this application, the shaft body and the limiting groove, as well as the screw body and the screw cap, are all integrally machined.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] By using an eccentric anti-detachment limiting plate, an eccentric slot, and a limiting screw, when the center of the eccentric anti-detachment limiting plate is located at the center of the output shaft, an inner flange can be installed on the output shaft. A plate assembly and an outer flange can be installed on the surface of the inner flange. When the output shaft rotates at high speed, the inner flange, outer flange, plate assembly, and eccentric anti-detachment limiting plate all rotate at high speed with the output shaft. During this process, the centrifugal force generated by the high-speed rotation will cause the eccentric anti-detachment limiting plate to move outward along the limiting slot. When the center of the eccentric anti-detachment limiting plate moves to a position far away from the center of the output shaft, the eccentric anti-detachment limiting plate will block the outer flange, and the screw cap of the limiting screw will prevent the eccentric anti-detachment limiting plate from moving longitudinally and falling off.

[0020] By using an eccentric anti-detachment limiting plate in conjunction with a limiting screw, longitudinal limiting of the outer flange can be achieved, preventing the grinding or cutting disc from falling off the output shaft and ensuring safety during use. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of a mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder, provided in this application. Figure 1 .

[0022] Figure 2 A schematic cross-sectional view of the mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder provided in this application. Figure 1 .

[0023] Figure 3 A schematic diagram of the explosive structure of a mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder, provided in this application. Figure 1 .

[0024] Figure 4 A schematic diagram of the overall structure of a mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder, provided in this application. Figure 2 .

[0025] Figure 5 A schematic cross-sectional view of the mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder provided in this application. Figure 2 .

[0026] Figure 6 A schematic diagram of the explosive structure of a mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder, provided in this application. Figure 2 .

[0027] The image shows:

[0028] 1. Output shaft; 101. Shaft body; 102. Screw hole; 103. External thread; 104. Limiting groove; 2. Eccentric anti-loosening limiting plate; 3. Eccentric groove hole; 4. Limiting screw; 401. Screw body; 402. Screw cap; 5. Inner flange; 7. Outer flange; 701. Grinding disc; 702. Mounting opening; 703. Cutting disc. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Example:

[0032] like Figure 1-6As shown, this embodiment proposes a mechanism to prevent the grinding or cutting disc from falling off after an emergency stop of an angle grinder. The mechanism includes an output shaft 1, an eccentric anti-detachment limiting plate 2 located on the top end face of the shaft body 101, and a limiting screw 4. The output shaft 1 includes a shaft body 101 and an external thread 103 on the outer surface of the shaft body 101. A limiting groove 104 is formed in the middle of the top end of the shaft body 101. An eccentric anti-detachment limiting plate 2 is disposed inside the limiting groove 104. The depth of the limiting groove 104 is slightly greater than the thickness of the eccentric anti-detachment limiting plate 2, and the width of the limiting groove 104 is slightly greater than the width of the eccentric anti-detachment limiting plate 2. The output shaft 1 is provided with a screw hole 102. The distance from the bottom of the screw hole 102 to the bottom surface of the limiting groove 104 on the output shaft 1 is about 10mm, which is used to install the limiting screw 4. The eccentric anti-detachment limiting plate 2 is provided with an eccentric slot 3. The width of the eccentric slot 3 is slightly larger than the outer diameter of the thread of the limiting screw 4. The eccentric distance is about 1.15 times the pitch of the external thread 103. The maximum dimension of the length end face of the eccentric anti-detachment limiting plate 2 is smaller than the thread root diameter of the external thread 103. When the eccentric anti-detachment limiting plate 2 moves to the eccentric limit position, the distance from its end face away from the center of the output shaft 1 to the center of the output shaft 1 is greater than half the outer diameter of the external thread 103. The eccentric anti-detachment limiting plate 2 can move within the limiting groove 104. A limiting screw 4 is provided inside the eccentric groove 3. The limiting screw 4 includes a screw body 401 and a screw cap 402. The screw body 401 is threaded into the threaded hole 102 at the center of the top end face of the shaft 101, with a thread length of approximately 10mm. The lower end face of the screw cap 402 contacts the top end face of the shaft 101. An inner flange 5 is fitted onto the shaft 101. A plate assembly is provided on the upper surface of the inner flange 5, and an outer flange 7 is provided on the upper surface of the plate assembly. The plate assembly includes a grinding disc 701 located between the inner flange 5 and the outer flange 7. 01 has an installation opening 702, the outer flange 7 is located in the installation opening 702, the plate assembly includes a cutting plate 703 located between the inner flange 5 and the outer flange 7, the upper and lower end faces of the cutting plate 703 are respectively in contact with the outer flange 7 and the inner flange 5, the outer surface of the eccentric anti-detachment limiting plate 2 is in contact with the inner surface of the limiting groove 104, the limiting screw 4 is inserted into the eccentric groove hole 3 of the eccentric anti-detachment limiting plate 2, the limiting screw 4 is screwed into the screw hole 102 at the center of the top end face of the shaft 101 through the screw body 401 thread, and the shaft 101 is screwed into the outer flange 7 through the external thread 103 thread.

[0033] Install the output shaft 1 at the designated mounting position on the angle grinder. Start the angle grinder, which drives the output shaft 1 to rotate at high speed. The limit screw 4, inner flange 5, outer flange 7, plate assembly, and eccentric anti-detachment limit plate 2 all rotate at high speed along with the output shaft 1. During this process, a large centrifugal force is generated. Through the eccentric slot 3, the eccentric anti-detachment limit plate 2 moves outward within the limit groove 104. The limit groove 104 guides the eccentric anti-detachment limit plate 2. When the center of the eccentric anti-detachment limit plate 2 moves to the far... When the output shaft 1 is at its extreme position, the eccentric anti-detachment limiting plate 2 will block the outer flange 7, and the screw cap 402 on the limiting screw 4 will block the eccentric anti-detachment limiting plate 2. Through the cooperation of the eccentric anti-detachment limiting plate 2 and the limiting screw 4, the longitudinal limit of the outer flange 7 can be achieved. Through the cooperation of the outer flange 7 and the inner flange 5, the grinding disc 701 or the cutting disc 703 is longitudinally limited, which can prevent the grinding disc 701 or the cutting disc 703 from falling off the output shaft 1, thus achieving a good anti-detachment effect and ensuring the safety of the grinding disc 701 or the cutting disc 703 during use.

[0034] During the use of the angle grinder, the operator can choose to install the grinding disc 701 or the cutting disc 703 according to actual needs (grinding or cutting). Meanwhile, the installation method of the output shaft 1 and the angle grinder is common knowledge to those skilled in the art (the outer shell of the angle grinder is designed with special mounting holes or mounting seats for mounting bearings. The output shaft 1 passes through the inner ring of the bearing, and the outer ring of the bearing is tightly fitted with the mounting hole or mounting seat of the machine body to ensure the stability and rotational accuracy of the output shaft 1), which will not be described in detail in this embodiment.

[0035] like Figure 2 and Figure 5 As shown, the shaft 101 and the limiting groove 104, as well as the screw body 401 and the screw cap 402, are integrally machined.

[0036] The above embodiments are only used to illustrate the present utility model and are not intended to limit the technical solutions described in the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, the present utility model is not limited to the specific embodiments described above. Therefore, any modifications or equivalent substitutions to the present utility model, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model, are covered within the scope of the claims of the present utility model.

Claims

1. A mechanism for preventing the grinding or cutting disc from falling off after an emergency stop of an angle grinder, comprising an output shaft (1), an eccentric anti-detachment limiting plate (2) located on the top end face of the shaft body (101), and a limiting screw (4), characterized in that, The output shaft (1) includes a shaft body (101), the outer surface of which is provided with an external thread (103). A limiting groove (104) is opened in the middle of the top end face of the shaft body (101). An eccentric anti-detachment limiting piece (2) is placed inside the limiting groove (104). The depth of the limiting groove (104) is slightly greater than the thickness of the eccentric anti-detachment limiting piece (2), and the width of the limiting groove (104) is slightly greater than the width of the eccentric anti-detachment limiting piece (2). 01) A screw hole (102) is provided at the center of the top end face. The distance from the bottom of the screw hole (102) to the bottom surface of the limiting groove (104) on the output shaft (1) is about 10mm, which is used to install the limiting screw (4). An eccentric anti-detachment limiting plate (2) is provided with an eccentric slot (3). The width of the eccentric slot (3) is slightly larger than the outer diameter of the thread of the limiting screw (4). The eccentric distance is about 1.15 times the pitch of the external thread (103). The eccentric anti-detachment limiting plate ( 2) The maximum dimension of the length end face is less than the thread root diameter of the external thread (103). When the eccentric anti-detachment limiting plate (2) moves to the eccentric limit position, the distance from the end face away from the center of the output shaft (1) to the center of the output shaft (1) is greater than the radius of the outer diameter of the external thread (103). The eccentric anti-detachment limiting plate (2) can move in the limiting groove (104). The eccentric groove hole (3) is provided with a limiting screw (4). The limiting screw (4) includes a screw body (401) and a screw cap (402). The screw body (401) is threaded to the screw hole (102) at the center of the top end face of the shaft body (101). The thread length is about 10mm. The lower end face of the screw cap (402) is in contact with the top end face of the shaft body (101). An inner flange (5) is sleeved on the shaft body (101). A plate assembly is provided on the upper surface of the inner flange (5). An outer flange (7) is provided on the upper surface of the plate assembly.

2. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The plate assembly includes a grinding plate (701) located between the inner flange (5) and the outer flange (7), with an installation opening (702) on the grinding plate (701) and the outer flange (7) located inside the installation opening (702).

3. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The plate assembly includes a cutting plate (703) located between the inner flange (5) and the outer flange (7), with the upper and lower end faces of the cutting plate (703) respectively fitting against the outer flange (7) and the inner flange (5).

4. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The outer surface of the eccentric anti-detachment limiting piece (2) is in contact with the inner surface of the limiting groove (104).

5. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The limiting screw (4) is inserted into the eccentric slot (3) of the eccentric anti-detachment limiting piece (2) for connection.

6. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The limiting screw (4) is screwed into the screw hole (102) at the center of the top end face of the shaft (101) through the screw body (401) thread.

7. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The shaft (101) is threadedly connected to the outer flange (7) via an external thread (103).

8. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The inner flange (5) is fitted onto the shaft (101).

9. The mechanism for preventing the grinding disc or cutting disc from falling off after an emergency stop of an angle grinder according to claim 1, characterized in that, The shaft (101) and the limiting groove (104), as well as the screw body (401) and the screw cap (402), are all integrally machined.

Images