Polishing device for metal hot working welding

Abstract

The utility model relates to the technical field of metal processing, and discloses a polishing device for metal hot working welding, which comprises an angle grinder and a protective cover, one side of the protective cover is fixedly connected with a limiting component, the outer side of the protective cover is sleeved with a rotating cover, the rotating cover is fixedly connected with a rotating shaft, and the rotating shaft is fixedly connected with the angle grinder. The limiting component is rotationally connected with the limiting component; according to the utility model, the protective cover is used for covering the grinding wheel in the protective cover, so that the grinding wheel can be covered by the protective cover after the angle grinder is stopped, especially after the angle grinder is not closed and power is suddenly cut off, so that the grinding wheel is not contacted with the ground or other hard objects; when the angle grinder is powered on again, due to the fact that the grinding wheel is isolated by the protective cover, even if the motor is restarted to generate torque, the grinding wheel can only rotate in the protective cover, bounce caused by ground friction force is avoided, and the grinding wheel is prevented from falling off. Therefore, the risk that the grinding wheel bounces up to hurt people is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal processing, in particular to a grinding device for metal hot processing welding. Background Technique

[0002] A hand-held angle grinder, also known as a small angle grinder, is a portable and lightweight electric tool mainly used in industries such as metal processing and sheet metal processing. Its main advantage lies in its small size and portability, which makes it easy to operate and suitable for work that requires continuous use. Before metal welding, an oxide layer may form on the metal surface, which will affect the quality and effect of welding. Using a hand-held angle grinder, with a suitable grinding wheel or wire brush, these oxide layers can be effectively removed, providing a clean and impurity-free surface for welding. If there is rust or dirt on the metal surface, it will also affect the welding quality. The hand-held angle grinder can be equipped with a rust-removing wheel to effectively remove these rust and dirt, providing a clean surface for welding.

[0003] Currently, the patent with the publication number CN215470256U discloses a hand-held lithium-ion angle grinder, which includes a housing. A protective cover is connected to the left end of the housing. An arc-shaped spray frame is fixedly connected to the inner wall of the protective cover. A cutting wheel is rotatably connected in the protective cover. Two arc-shaped plates are fixedly connected to the upper side wall of the housing. Two slots are symmetrically opened on the upper side walls of the two arc-shaped plates in the front and rear directions. Plug blocks are inserted into the four slots. The upper side walls of the four plug blocks are fixedly connected to the same water tank. A pump is fixedly connected to the inner wall of the water tank. The output end of the pump penetrates through the side wall of the water tank and is fixedly communicated with a connecting pipe. The left end of the connecting pipe is fixedly communicated with the upper side wall of the arc-shaped spray frame through a connecting mechanism. When using the angle grinder to cut materials such as tiles and marble, water is automatically sprayed onto the cutting area, reducing dust and avoiding the safety hazards of an operator cutting with one hand and pouring water with the other hand, ensuring the work quality of the operator.

[0004] However, the above technical solution still has the following problems:

[0005] After the hand-held angle grinder is powered off without being turned off and then powered on again, no appropriate preventive measures are taken, there is a risk of the grinding wheel bouncing up after rubbing against the ground and hurting people. When the grinding wheel rotates at a high speed, it has a large kinetic energy. When this kinetic energy is suddenly blocked by the frictional force of the ground, the grinding wheel will try to maintain its original motion state, that is, continue to rotate. However, due to the obstruction of the ground and the action of the motor torque, the grinding wheel will be in an unstable state under the action of these two forces and is prone to bounce. The grinding wheel may bounce up at a very high speed, thus possibly hitting the face, neck or other body parts of the operator, causing serious injuries. Content of the Utility Model

[0006] In view of the deficiencies of the prior art, the present utility model provides a grinding device for metal hot working welding, so as to solve at least one of the problems raised in the background art, such as: reducing the safety risk of the angle grinder during use when power is restored after power failure without shutting down.

[0007] To achieve the above object, the present utility model provides the following technical solution: A grinding device for metal hot working welding, including an angle grinder and a protective cover installed outside the gear of the angle grinder. One side of the protective cover is fixedly connected with a limiting component. A rotating cover is sleeved outside the protective cover. One end of the rotating cover is fixedly connected with a rotating shaft, and the rotating shaft extends into the limiting component and is rotatably connected with the limiting component.

[0008] Further: The limiting component includes a protective shell and rubber strips. A cavity is opened in the protective shell. A plurality of rubber strips are fixedly connected to the inner wall of the cavity of the protective shell. A clamping strip is fixedly connected to the outside of the rotating shaft, and the outside of the clamping strip is in fit connection with the outside of the rubber strips.

[0009] Further: The number of the rubber strips is greater than 1, and they are arranged at equal intervals on the inner wall of the cavity of the protective shell.

[0010] Further: A bearing is installed at the central position of the bottom of the cavity of the protective shell. One end of the rotating shaft is fixedly connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the protective shell.

[0011] Further: One end of the protective cover is fixedly connected with a grid baffle, and one end of the grid baffle is in fit connection with one end of the rotating cover.

[0012] Further: Two symmetrically installed rubber columns are fixedly connected to one end of the protective cover, and insertion holes for inserting and connecting with the rubber columns are provided on the surface of the grid baffle.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] In the present utility model, the grinding wheel is covered by the protective cover. After stopping using the angle grinder, especially when the power suddenly fails without shutting down the angle grinder, the protective cover can be used to cover the grinding wheel so that it does not contact the ground or other hard objects. After the power is restored, the unstable bounce caused by the friction between the grinding wheel and the ground due to inertia or external force is avoided. When the angle grinder is powered on again, since the grinding wheel is isolated by the protective cover, even if the motor restarts to generate torque, the grinding wheel will only rotate inside the protective cover and will not bounce due to the ground friction, which greatly reduces the risk of the grinding wheel bouncing and hurting people. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is Figure 1Enlarged schematic view of part A;

[0017] Figure 3 Stereoscopic structure schematic diagram of the protective cover of the present utility model;

[0018] Figure 4 Stereoscopic structure schematic diagram of the rotating cover of the present utility model;

[0019] Figure 5 Internal stereoscopic structure schematic diagram of the limit component of the present utility model.

[0020] In the figure: 1. Protective cover; 101. Grid baffle; 102. Socket; 2. Rotating cover; 3. Limit component; 4. Rotating shaft; 5. Card strip; 6. Protective shell; 7. Rubber strip; 8. Bearing; 9. Rubber column. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] As Figures 1 to 5 shown, a grinding device for metal hot working welding includes a angle grinder and a protective cover 1 installed outside the gear of the angle grinder. One side of the protective cover 1 is fixedly connected with a limit component 3. A rotating cover 2 is sleeved outside the protective cover 1. One end of the rotating cover 2 is fixedly connected with a rotating shaft 4. The rotating shaft 4 extends into the limit component 3 and is rotatably connected with the limit component 3.

[0023] As Figure 1 shown, a grinding device for metal hot working welding in the present utility model is similar in structure to the existing handheld angle grinder. For example, the handheld lithium battery angle grinder disclosed in the patent with the publication number of CN215470256U. The main improvement of the present utility model lies in improving the safety of operating the handheld angle grinder and reducing the risk of the grinding wheel bouncing and hurting people. As Figures 1 to 5As shown, when a grinding device for metal hot - working welding in the present utility model is in use, the protective cover 1 is installed outside the gear of the angle grinder. Its main function is to protect the operator from accidental injuries caused by flying debris and the grinding wheel. The limiting component 3 is fixedly connected to one side of the protective cover 1, and its main function is to fix and limit the rotation range of the rotating cover 2. By adjusting the limiting component 3, it can be ensured that the rotating cover 2 rotates within an appropriate angle range. After the operator stops using only the angle grinder, the rotating cover 2 is rotated so that it completely covers the grinding wheel. Even when the angle grinder is placed on the ground, the rotating cover 2 contacts the ground, and the grinding wheel is inside the rotating cover 2 and does not contact the ground. When the angle grinder is not turned off and is powered on, the grinding wheel will not bounce up and hurt people. The rotating shaft 4 extends into the limiting component 3 and is rotatably connected to the limiting component 3, which enables the rotating cover 2 to freely rotate around the rotating shaft 4 within a limited angle range. The rotating shaft 4 ensures the stability and safety of the rotating cover 2 during the rotation process.

[0024] As Figures 2 to 5 shown, the limiting component 3 includes a protective shell 6 and rubber strips 7. A cavity is formed inside the protective shell 6, and a plurality of rubber strips 7 are fixedly connected to the inner wall of the cavity of the protective shell 6. A clamping strip 5 is fixedly connected to the outer side of the rotating shaft 4, and the outer side of the clamping strip 5 is in fit connection with the outer side of the rubber strip 7.

[0025] Specifically, through this setting, a cavity is formed inside the protective shell 6, providing a space for protecting and fixing other components inside. The rubber strip 7 is made of rubber material and has good wear resistance, anti - slip property and elasticity. The main function of the rubber strip 7 is to provide friction with the clamping strip 5, thereby restricting the rotation range of the rotating shaft 4 and the clamping strip 5. When the rotating shaft 4 attempts to rotate beyond the set angle, the friction of the rubber strip 7 will prevent its further rotation, ensuring the safety and controllability of the operation. The clamping strip 5 rotates inside the rubber strip 7 and is restricted by the friction provided by the rubber strip 7. When the rotating shaft 4 rotates, the clamping strip 5 rotates accordingly. Due to the friction of the rubber strip 7, the rotation range of the rotating shaft 4 is restricted, which can provide additional protection when using the angle grinder.

[0026] As Figure 5 shown, the number of rubber strips 7 is greater than 1, and they are arranged at equal intervals on the inner wall of the cavity of the protective shell 6.

[0027] Specifically, due to the existence of multiple rubber strips 7 through this setting, the gaps between them can form a series of gears, similar to the gaps between gear teeth, which enables the operator to more precisely adjust the angle of the rotating cover 2.

[0028] As Figure 5 shown, a bearing 8 is installed at the center position of the bottom of the cavity of the protective shell 6. One end of the rotating shaft 4 is fixedly connected to the inner ring of the bearing 8, and the outer ring of the bearing 8 is fixedly connected to the protective shell 6.

[0029] Specifically, with this arrangement, the bearing 8 is used to support the rotating shaft 4 to rotate within the protective housing 6 with extremely high precision and flexibility, ensuring that the rotating shaft 4 and the rotating cover 2 connected thereto can rotate smoothly and accurately to the required angle.

[0030] As Figure 3 shown, one end of the protective cover 1 is fixedly connected with a grid baffle 101, and one end of the grid baffle 101 is in fitting connection with one end of the rotating cover 2.

[0031] Specifically, with this arrangement, the grid baffle 101 serves as an additional physical barrier, which can hold the rotating cover 2 on the protective cover 1 when using the angle grinder, preventing the rotating cover 2 from rotating excessively and affecting the normal use of the angle grinder.

[0032] As Figures 3 to 4 shown, two symmetrically installed rubber columns 9 are fixedly connected to one end of the protective cover 1, and insertion holes 102 for inserting and connecting with the rubber columns 9 are formed on the surface of the grid baffle 101.

[0033] Specifically, with this arrangement, when using the angle grinder, insert the rubber columns 9 into the insertion holes 102 to fix the rotating cover 2 above the protective cover 1, preventing the rotating cover 2 from affecting the use of the angle grinder. When the angle grinder is not in use, the rotating cover 2 can be rotated to cover the grinding wheel, and the rubber columns 9 at the other end can be inserted into the insertion holes 102 to fix it at the required position.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grinding device for metal hot processing welding, comprising an angle grinder and a protective cover (1) installed outside the gear of the angle grinder, characterized in that: One side of the protective cover (1) is fixedly connected to a limit assembly (3); a rotating cover (2) is sleeved on the outside of the protective cover (1); one end of the rotating cover (2) is fixedly connected to a rotating shaft (4); the rotating shaft (4) extends into the limit assembly (3) and is rotatably connected to the limit assembly (3).

2. A grinding device for metal hot working welding according to claim 1, characterized in that: The limiting assembly (3) comprises a protective shell (6) and a rubber strip (7); a cavity is provided in the protective shell (6); a plurality of rubber strips (7) are fixedly connected to the inner wall of the cavity of the protective shell (6); a clamping strip (5) is fixedly connected to the outer side of the rotating shaft (4); and the outer side of the clamping strip (5) and the outer side of the rubber strip (7) are fitted and connected.

3. A grinding device for metal hot working welding according to claim 2, characterized in that: The number of the rubber strips (7) is greater than 1, and they are arranged at equal intervals on the inner wall of the cavity of the protective shell (6).

4. A grinding device for hot metal welding according to claim 2 or 3, characterized in that: A bearing (8) is installed at the center of the bottom of the cavity of the protective shell (6); one end of the rotating shaft (4) is fixedly connected to the inner ring of the bearing (8); and the outer ring of the bearing (8) is fixedly connected to the protective shell (6).

5. A grinding device for hot metal welding according to claim 1, 2 or 3, characterized in that: One end of the protective cover (1) is fixedly connected to a baffle plate (101), and one end of the baffle plate (101) is fitted and connected to one end of the rotating cover (2).

6. A grinding device for metal hot working welding according to claim 4, characterized in that: One end of the protective cover (1) is fixedly connected to a baffle plate (101), and one end of the baffle plate (101) is fitted and connected to one end of the rotating cover (2).

7. A grinding device for metal hot working welding according to claim 5, characterized in that: One end of the protective cover (1) is fixedly connected to two symmetrically mounted rubber columns (9), and a socket (102) for inserting and connecting with the rubber columns (9) is provided on the surface of the baffle plate (101).

8. A grinding device for metal hot working welding according to claim 6, characterized in that: One end of the protective cover (1) is fixedly connected to two symmetrically mounted rubber columns (9), and a socket (102) for inserting and connecting with the rubber columns (9) is provided on the surface of the baffle plate (101).

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