Angle grinder

Abstract

The invention relates to the technical field of grinding, in particular to an angle grinder which comprises a seat body, a top seat is mounted at the top of the seat body, a shaft hole is formed in one face of the top seat, a movable shaft is inserted in the shaft hole, a cavity communicated with the shaft hole is formed in one side face of the top seat, and an eccentric disc is rotatably mounted in the cavity. A limiting head is fixedly connected to the face, facing the movable shaft, of the eccentric disc, a connecting rod is installed on the face, deviating from the limiting head, of the eccentric disc, an eccentric handle is installed at the end, located on the outer side of the cavity, of the connecting rod, and three bottom feet which are annularly arranged at equal intervals are arranged on the lower side of the connecting base. Three angle measuring instruments matched with the bottom feet are annularly installed on the face, away from the bottom feet, of the connecting base at equal intervals. The angle adjusting device has the following beneficial effects that the situation of blind adjustment during manual angle adjustment is avoided, a certain position of a workpiece is prevented from being repeatedly ground, the grinding time is shortened, and the grinding efficiency is improved.

Description

Technical Field

[0001] The invention relates to an angle grinder and belongs to the technical field of grinding. Background Art

[0002] Angle grinding tools are commonly used in various applications of grinding and polishing. This tool is widely used in metal processing, stone cutting, surface treatment and other fields. Through the high-speed rotating grinding wheel, it can efficiently complete tasks such as grinding and cutting. The design of the angle grinder enables the operator to flexibly adjust the grinding angle, which is suitable for a variety of work scenarios. During the use of the angle grinder, manually adjusting the angle between the workpiece and the grinding wheel is a common operation method. When manually adjusting the angle between the workpiece and the grinding wheel, the operator cannot accurately know the angle data between the workpiece and the grinding wheel, and there is a blind adjustment of the angle between the workpiece and the grinding wheel. In order to prevent every part of the workpiece surface from being ground, a certain position of the workpiece will be repeatedly ground during the grinding process, affecting the grinding efficiency. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention aims to provide an angle grinder to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: an angle grinder, including a seat body, a top seat is installed on the top of the seat body, one side of the top seat is provided with an axial hole, a movable shaft is inserted in the axial hole, one end of the movable shaft is provided with a connecting seat for rotatably connecting a workpiece fixture, a side surface of the top seat is provided with a cavity communicating with the axial hole, an eccentric disk is rotatably installed in the cavity, a side of the eccentric disk facing the movable shaft is connected to a fixed limiting head, a notch is provided on the outer surface of the movable shaft, the limiting head is inserted in the notch, and the eccentric disk is provided with a notch. A connecting rod is installed on the side of the core disk away from the limit head, and the connecting rod and the limit head are arranged in a staggered manner. An eccentric handle is installed on the end of the connecting rod outside the cavity, and three base feet arranged equidistantly in a ring are provided on the lower side of the connecting seat. The base feet are a transparent structure, and the base feet are connected to the seat body through screws. Three angle measuring instruments matching the base feet are installed equidistantly in a ring on the side of the connecting seat away from the base feet, and one end of the angle measuring instrument is inserted in the base foot. A clamping screw for limiting the relative position of the connecting rod and the top seat is threadedly connected to one side of the top seat.

[0005] Specifically, a small hole communicating with the cavity is formed on one side surface of the top seat close to the connecting seat. A shielding tube concentric with the small hole is arranged outside the small hole. A U-shaped plate is fixedly connected to one end of the shielding tube close to the small hole. The U-shaped plate is clamped on the top seat. A circular nut is installed on one side of the shielding tube close to the small hole. One end of the clamping screw is threadedly connected in the circular nut, and one end of the clamping screw extends into the small hole. A pipe cap is sleeved on the end of the shielding tube away from the small hole. The inner diameter of the pipe cap is the same as the outer diameter of the shielding tube. A sleeve is sleeved on the clamping screw and fixedly connected to the clamping screw. A knob head is fixedly connected to the end of the clamping screw away from the small hole.

[0006] Specifically, a slot is machined at the corner of one side surface of the connecting seat facing the shielding tube. An insertion block is inserted into the slot. A detachable limiting rod is installed at one end of the insertion block close to the shielding tube. A limiting tube is sleeved on the limiting rod. One end of the limiting tube is fixedly connected to the U-shaped plate. A threaded hole for installing a shaft rod for rotatably connecting a workpiece fixture and the connecting seat is formed at the middle position of the surface of the insertion block away from the limiting rod.

[0007] Specifically, the cross-section of the slot is rectangular, and the cross-section of the insertion block is rectangular.

[0008] Specifically, a threaded hole is machined at one end of the insertion block close to the limiting rod, an external thread is machined at one end of the limiting rod, and the end of the limiting rod with the external thread is threadedly connected in the threaded hole.

[0009] Specifically, three countersunk holes are equidistantly arranged in a ring on one side surface of the seat body. One end of the base is installed in the countersunk hole through a screw, and one end of the angle measuring instrument is installed on the side of the countersunk hole away from the base through a screw.

[0010] Specifically, a countersunk groove is formed on the surface of the connecting seat facing away from the top seat. The lower end of the countersunk groove is open. A hexagon socket head screw is inserted into the countersunk groove. One end of the hexagon socket head screw is threadedly connected to the movable shaft.

[0011] Specifically, a round hole is formed on one surface of the eccentric handle. One end of the connecting rod is inserted into the round hole. A flat surface is machined at the end of the connecting rod in the round hole. Two threaded through holes for threadedly connecting positioning screws are formed on the arc surface of the eccentric handle. The threaded through holes communicate with the round hole. The positioning screw in one of the threaded through holes is in contact with the flat surface.

[0012] Advantages of the present invention:

[0013] 1. A rotational connection relationship is formed between the workpiece fixture and the connection base. By turning the eccentric handle, the connecting rod is rotated. The connecting rod drives the limit head to move through the eccentric disc. The limit head cooperates with the notch on the movable shaft to make the movable shaft move along the shaft hole, so that one or more of the three feet cooperate with the workpiece fixture to change the angle of the workpiece fixture. The three angle measuring instruments cooperate with each other to transmit the measured data to the display, so as to accurately know the angle of the workpiece fixture, that is, the angle of the workpiece on the workpiece fixture is accurately known, avoiding blind adjustment when manually adjusting the angle, preventing repeated grinding of a certain position of the workpiece, reducing the grinding time, and improving the grinding efficiency.

[0014] 2. After the angle of the workpiece fixture connected to the connection base meets the requirements, after turning the clamping screw, it is convenient to limit the relative position of the connecting rod and the top seat. Since the threaded connection part of the clamping screw and the round nut is in the closed space formed by the shielding tube and the tube cap, the debris generated during the grinding process will not enter the threaded connection part of the clamping screw and the round nut.

[0015] 3. The U-shaped plate is snap-fitted on the top seat, and one end of the clamping screw extends into the small hole. Thus, the clamping screw and the U-shaped plate cooperate with each other to keep the relative position of the shielding tube and the top seat unchanged. There is no need to use other fasteners to limit the relative position of the shielding tube and the top seat. After moving one end of the clamping screw to the outside of the small hole, the shielding tube and the top seat can be separated.

[0016] 4. The plug-in block is inserted into the slot, and then one end of the limit rod is inserted into the limit tube. Furthermore, components such as the limit rod, the limit tube, the U-shaped plate, and the clamping screw jointly limit the relative position of the plug-in block and the connection base. At the same time, the cooperation between the limit rod and the limit tube does not affect the movement of the connection base along with the movable shaft. When the threaded hole on the plug-in block is damaged during the cooperation with the shaft rod, separating the plug-in block and the connection base can replace the damaged threaded hole, reducing the replacement cost of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present invention will become more apparent:

[0018] Figure 1 It is a schematic structural diagram of an angle grinder of the present invention;

[0019] Figure 2 It is another perspective three-dimensional view of an angle grinder of the present invention;

[0020] Figure 3 It is an assembly schematic diagram of the top seat and the seat body in an angle grinder of the present invention;

[0021] Figure 4Schematic assembly diagram of the eccentric handle, connecting rod, eccentric disc, limit head and movable shaft in an angle grinder of the present invention;

[0022] Figure 5 Exploded assembly schematic diagram of the foot and angle measuring instrument in an angle grinder of the present invention;

[0023] Figure 6 Schematic assembly diagram of the clamping screw, pipe cap, shielding pipe, U-shaped plate, plug-in block and connecting seat in an angle grinder of the present invention;

[0024] Figure 7 Exploded assembly schematic diagram of the limit rod, plug-in block and connecting seat in an angle grinder of the present invention;

[0025] In the figure: 1, base body; 2, foot; 3, connecting seat; 4, countersunk head groove; 5, plug-in block; 6, limit rod; 7, limit tube; 8, pipe cap; 9, shielding pipe; 10, connecting rod; 11, eccentric handle; 12, top seat; 13, angle measuring instrument; 14, movable shaft; 15, U-shaped plate; 16, clamping screw; 17, countersunk head hole; 18, cavity; 19, shaft hole; 20, small hole; 21, notch; 22, limit head; 23, eccentric disc; 24, hexagon socket head screw; 25, round nut; 26, slot; 27, threaded hole; 28, screw hole. Detailed implementation manners

[0026] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0027] Please refer to Figures 1-4 , the present invention provides a technical solution: an angle grinder, including a base body 1, a top seat 12 is installed on the top of the base body 1, a shaft hole 19 is opened on one side of the top seat 12, a movable shaft 14 is inserted into the shaft hole 19, and a connecting seat 3 for rotatably connecting a workpiece fixture is installed at one end of the movable shaft 14. A countersunk head groove 4 is opened on the side of the connecting seat 3 facing away from the top seat 12, the lower end of the countersunk head groove 4 is open, a hexagon socket head screw 24 is inserted into the countersunk head groove 4, and one end of the hexagon socket head screw 24 is threadedly connected to the movable shaft 14. The hexagon socket head screw 24 is used to connect the movable shaft 14 and the connecting seat 3, which is convenient for disassembling the connecting seat 3 and the movable shaft 14.

[0028] Refer to Figures 1-5A cavity 18 communicating with the shaft hole 19 is formed on one side of the top seat 12, an eccentric disc 23 is rotatably mounted in the cavity 18, a side of the eccentric disc 23 facing the movable shaft 14 is connected to a fixed limit head 22, a notch 21 is formed on the outer surface of the movable shaft 14, the limit head 22 is inserted into the notch 21, a connecting rod 10 is mounted on the side of the eccentric disc 23 away from the limit head 22, the connecting rod 10 and the limit head 22 are staggered, and an eccentric handle 11 is mounted on the end of the connecting rod 10 outside the cavity 18 The lower side of the connecting seat 3 is provided with three feet 2 arranged in an annular shape and at equal intervals. The feet 2 are transparent structures. The feet 2 are connected to the seat body 1 by screws. The side of the connecting seat 3 away from the feet 2 is provided with three angle measuring instruments 13 matched with the feet 2 in an annular shape and at equal intervals. One end of the angle measuring instrument 13 is inserted in the feet 2, and one side of the seat body 1 is provided with three countersunk holes 17 in an annular shape and at equal intervals. One end of the feet 2 is installed in the countersunk holes 17 by screws, and one end of the angle measuring instrument 13 is installed in the countersunk holes 17 by screws. The countersunk hole 17 is away from one side of the base 2, and the countersunk hole 17 provides space for the installation of the angle measuring instrument 13, the base 2 and the seat body 1. The base 2 plays a role in protecting the angle measuring instrument 13 on the one hand, and in supporting the workpiece fixture on the other hand, so that the workpiece fixture and the connecting seat 3 form a rotational connection relationship, and the eccentric handle 11 is used to rotate the connecting rod 10, and the connecting rod 10 drives the limit head 22 to move through the eccentric disk 23, and the limit head 22 cooperates with the notch 21 on the movable shaft 14 to make the movable shaft 14 move along the shaft hole 19, so that one or more of the three bases 2 cooperate with the workpiece fixture to change the angle of the workpiece fixture, and the three angle measuring instruments 13 cooperate with each other to transmit the measured data to the display, so as to facilitate the accurate acquisition of the angle of the workpiece fixture, that is, the angle of the workpiece on the workpiece fixture is accurately known, avoiding blind adjustment when manually adjusting the angle, and preventing a certain position of the workpiece from being repeatedly ground, thereby reducing the grinding time and improving the grinding efficiency.

[0029] See also Figures 1-3 , Figure 6, a clamping screw 16 for restricting the relative position of the connecting rod 10 and the top seat 12 is threadedly connected to one side surface of the top seat 12. A small hole 20 communicating with the cavity 18 is provided on one side surface of the top seat 12 close to the connecting seat 3. A shielding tube 9 concentric with the small hole 20 is provided outside the small hole 20. A U-shaped plate 15 is fixedly connected to one end of the shielding tube 9 close to the small hole 20. The U-shaped plate 15 is clamped on the top seat 12. A circular nut 25 is installed on one side of the shielding tube 9 close to the small hole 20. One end of the clamping screw 16 is threadedly connected in the circular nut 25, and one end of the clamping screw 16 extends into the small hole 20. A pipe cap 8 is sleeved on the end of the shielding tube 9 far from the small hole 20. The inner diameter of the pipe cap 8 is the same as the outer diameter of the shielding tube 9. The pipe sleeve is sleeved on the clamping screw 16 and fixedly connected to the clamping screw 16. A knob head is fixedly connected to the end of the clamping screw 16 far from the small hole 20. After the angle of the workpiece fixture connected to the connecting seat 3 meets the requirements, after turning the clamping screw 16, it is convenient to restrict the relative position of the connecting rod 10 and the top seat 12. Since the threaded connection part of the clamping screw 16 and the circular nut 25 is in the closed space formed by the shielding tube 9 and the pipe cap 8, the debris generated during the grinding process will not enter the threaded connection part of the clamping screw 16 and the circular nut 25. The U-shaped plate 15 is clamped on the top seat 12, and one end of the clamping screw 16 extends into the small hole 20. Thus, the clamping screw 16 and the U-shaped plate 15 cooperate with each other to keep the relative position of the shielding tube 9 and the top seat 12 unchanged. There is no need to use other fasteners to restrict the relative position of the shielding tube 9 and the top seat 12. After one end of the clamping screw 16 moves to the outside of the small hole 20, the shielding tube 9 and the top seat 12 can be separated.

[0030] Refer to Figures 1-3 , Figures 6-7, on one side corner of the connecting seat 3 facing the shielding tube 9, a slot 26 with a rectangular cross-section is machined. A plug block 5 with a rectangular cross-section is inserted into the slot 26. One end of the plug block 5 close to the shielding tube 9 is equipped with a detachable limiting rod 6. Wherein, one end of the plug block 5 close to the limiting rod 6 is machined with a threaded hole 28, and one end of the limiting rod 6 is machined with an external thread, so that the end of the limiting rod 6 with the external thread is threadedly connected in the threaded hole 28, facilitating the insertion of the limiting rod 6 and the plug block 5. A limiting tube 7 is sleeved on the limiting rod 6. One end of the limiting tube 7 is fixedly connected to the U-shaped plate 15. A threaded hole 27 for installing the shaft rod for rotatably connecting the workpiece clamp and the connecting seat 3 is provided at the middle position of the side of the plug block 5 away from the limiting rod 6. The plug block 5 is inserted into the slot 26, and then one end of the limiting rod 6 is inserted into the limiting tube 7. Furthermore, components such as the limiting rod 6, the limiting tube 7, the U-shaped plate 15, and the clamping screw 16 jointly limit the relative positions of the plug block 5 and the connecting seat 3. At the same time, the cooperation between the limiting rod 6 and the limiting tube 7 does not affect the movement of the connecting seat 3 along with the movable shaft 14. When the threaded hole 27 on the plug block 5 is damaged during the cooperation with the shaft rod, separating the plug block 5 and the connecting seat 3 can replace the damaged threaded hole 27, reducing the replacement cost of parts.

[0031] Refer to Figure 1 , a round hole is provided on one side of the eccentric handle 11. One end of the connecting rod 10 is inserted into the round hole. One end of the connecting rod 10 in the round hole is machined with a flat surface. Two threaded through holes for threadedly connecting positioning screws are provided on the arc surface of the eccentric handle 11. The threaded through holes communicate with the round hole, and the positioning screw in one of the threaded through holes contacts the flat surface to prevent the eccentric handle 11 from rotating around the connecting rod 10.

[0032] Although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An angle grinder, comprising a base body (1), characterized in that: A top seat (12) is installed on the top of the seat body (1), a shaft hole (19) is provided on one side of the top seat (12), a movable shaft (14) is inserted in the shaft hole (19), a connecting seat (3) for rotatably connecting a workpiece fixture is installed on one end of the movable shaft (14), a cavity (18) communicating with the shaft hole (19) is provided on one side of the top seat (12), an eccentric disk (23) is rotatably installed in the cavity (18), a side of the eccentric disk (23) facing the movable shaft (14) is connected to a fixed limit head (22), a notch (21) is provided on the outer surface of the movable shaft (14), the limit head (22) is inserted in the notch (21), and a connecting seat (3) is installed on a side of the eccentric disk (23) facing away from the limit head (22). A connecting rod (10), wherein the connecting rod (10) and the limit head (22) are arranged in a staggered manner, an eccentric handle (11) is installed at one end of the connecting rod (10) outside the cavity (18), three base feet (2) arranged equidistantly in a ring are provided on the lower side of the connecting seat (3), the base feet (2) are transparent structures, the base feet (2) are connected to the seat body (1) by screws, and three angle measuring instruments (13) matching with the base feet (2) are installed equidistantly in a ring on the side of the connecting seat (3) away from the base feet (2), one end of the angle measuring instrument (13) is inserted in the base feet (2), and a clamping screw (16) for limiting the relative position of the connecting rod (10) and the top seat (12) is threadedly connected to one side of the top seat (12).

2. The angle grinder according to claim 1, wherein: A small hole (20) communicating with the cavity (18) is provided on a side surface of the top seat (12) close to the connecting seat (3); a shielding tube (9) arranged concentrically with the small hole (20) is provided outside the small hole (20); a U-shaped plate (15) is connected and fixed to one end of the shielding tube (9) close to the small hole (20); the U-shaped plate (15) is clamped on the top seat (12); a circular nut (25) is installed on one side of the shielding tube (9) close to the small hole (20); the clamp One end of the tightening screw (16) is threadedly connected to the circular nut (25), and one end of the clamping screw (16) extends into the small hole (20). The end of the shielding tube (9) away from the small hole (20) is sleeved with a pipe cap (8), and the inner diameter of the pipe cap (8) is the same as the outer diameter of the shielding tube (9). The pipe sleeve is sleeved on the clamping screw (16) and connected and fixed to the clamping screw (16), and the end of the clamping screw (16) away from the small hole (20) is connected and fixed to a knob head.

3. The angle grinder according to claim 1, characterized in that: A slot (26) is processed at a corner of a side surface of the connecting seat (3) facing the shielding tube (9), and a plug-in block (5) is inserted in the slot (26). A detachable limiting rod (6) is installed at one end of the plug-in block (5) close to the shielding tube (9), and a limiting tube (7) is sleeved on the limiting rod (6). One end of the limiting tube (7) is connected and fixed to the U-shaped plate (15), and a threaded hole (27) for installing a shaft rod for rotatably connecting the workpiece fixture and the connecting seat (3) is opened in the middle of a side of the plug-in block (5) away from the limiting rod (6).

4. The angle grinder according to claim 3, characterized in that: The cross-section of the slot (26) is rectangular, and the cross-section of the plug block (5) is rectangular.

5. The angle grinder according to claim 3, characterized in that: One end of the plug block (5) close to the limit rod (6) is machined with a screw hole (28). One end of the limit rod (6) is machined with an external thread, and the end of the limit rod (6) with the external thread is threadedly connected in the screw hole (28).

6. The angle grinder according to claim 1, wherein: Three countersunk holes (17) are equidistantly arranged in a ring shape on one side surface of the base body (1). One end of the base foot (2) is installed in the countersunk hole (17) by a screw, and one end of the angle measuring instrument (13) is installed on the side of the countersunk hole (17) away from the base foot (2) by a screw.

7. The angle grinder according to claim 1, wherein: A countersunk groove (4) is formed on the surface of the connecting seat (3) facing away from the top seat (12). The lower end of the countersunk groove (4) is open. An internal hexagonal screw (24) is inserted in the countersunk groove (4), and one end of the internal hexagonal screw (24) is threadedly connected to the movable shaft (14).

8. The angle grinder according to claim 1, characterized in that: A round hole is formed on one surface of the eccentric handle (11). One end of the connecting rod (10) is inserted into the round hole. One end of the connecting rod (10) located in the round hole is machined with a flat surface. Two threaded through holes for threadedly connecting positioning screws are formed on the arc surface of the eccentric handle (11). The threaded through holes communicate with the round hole, and a positioning screw in one of the threaded through holes contacts the flat surface.

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