Grinding device

Abstract

The present invention provides a grinding device, relating to the technical field of machining machinery. The grinding device comprises a mounting frame, a slewing bearing, and an angle grinder. The slewing bearing is mounted on the mounting frame, and the angle grinder is mounted on the slewing bearing. The slewing bearing can drive the angle grinder to perform a slewing motion about the slewing bearing's rotational centerline. The mounting frame is used to connect a grinding workpiece. This alleviates technical problems in the prior art, such as safety hazards when grinding a grinding workpiece, the tendency to cause arm soreness in workers, and consequently, low grinding accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of processing machinery, in particular to a grinding device. Background Art

[0002] Angle grinders utilize high-speed rotating cutting blades to grind, cut, and polish materials. Currently, in actual use, most of the grinding operations require manual labor. Furthermore, manual labor is also required to change the cutting blades. However, when manually holding an angle grinder for grinding, not only is it easy for workers to come into direct contact with electrical wires, posing a safety hazard, but the grinder also requires constant manual labor to maintain a consistent distance and angle relative to the workpiece, which can easily cause arm pain and reduce grinding accuracy.

[0003] In view of this, there is an urgent need for a grinding device that can solve the above problems.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a grinding device to alleviate the technical problems in the prior art that not only there are safety hazards when grinding a workpiece, but also it is easy to cause soreness in the worker's arm, which in turn leads to low grinding accuracy.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention provides a grinding device, comprising a mounting frame, a slewing support and an angle grinder;

[0008] The slewing bearing is mounted on the mounting frame, and the angle grinder is mounted on the slewing bearing. The slewing bearing can drive the angle grinder to perform slewing motion around the slewing centerline of the slewing bearing, and the mounting frame is used to connect the grinding piece.

[0009] In any of the above technical solutions, further, the rotation diameter of the angle grinder can be adjusted, and / or the distance between the angle grinder and the grinding piece can be adjusted.

[0010] In any of the above technical solutions, the grinding device further includes a connecting assembly, one end of which is connected to the power output end of the slewing bearing, and the other end is connected to the angle grinder; the slewing bearing drives the angle grinder to perform a rotational motion through the connecting assembly.

[0011] In any of the above technical solutions, further, the connecting assembly includes a mounting seat, a guide rail and a first fastener;

[0012] The angle grinder is mounted on the guide rail, the guide rail is slidably connected to the mounting seat, and the first fastener is used to fix the guide rail relative to the mounting seat.

[0013] In any of the above technical solutions, further, the connecting assembly further includes a first adjusting rod and a first slider threadedly connected to the first adjusting rod;

[0014] The first adjusting rod is rotatably mounted on the mounting seat, the first sliding block is connected to the guide rail, and the first sliding block can move relative to the first adjusting rod to drive the guide rail to move synchronously.

[0015] In any of the above technical solutions, further, the connecting assembly also includes a sliding seat, the angle grinder is connected to the sliding seat, and the sliding seat can move in a vertical direction relative to the guide rail.

[0016] In any of the above technical solutions, further, the connecting assembly further includes a second fastener;

[0017] One end of the guide rail facing the sliding seat is provided with a plurality of mounting holes spaced apart in a vertical direction, and the second fastener can pass through the sliding seat and be connected to one of the mounting holes.

[0018] In any of the above technical solutions, further, the mounting frame includes a connecting arm and a claw connected to the connecting arm, and the claw can move relative to the connecting arm along the length direction of the connecting arm, and the claw is used to connect the grinding piece.

[0019] In any of the above technical solutions, further, the mounting bracket further includes a second adjustment rod rotatably connected to the connecting arm and a second slider threadedly connected to the second adjustment rod, and the claw is connected to the second slider;

[0020] The second sliding block can move relative to the second adjusting rod along the length direction of the second adjusting rod to drive the clamping claw to move synchronously.

[0021] In any of the above technical solutions, further, there are multiple connecting arms, and the multiple connecting arms are arranged at intervals around the rotation center line of the slewing bearing, and each of the connecting arms is connected to the claw.

[0022] The beneficial effects of the present invention are:

[0023] The present invention provides a grinding device, comprising a mounting frame, a slewing bearing mounted on the mounting frame, and an angle grinder mounted on the slewing bearing. The slewing bearing can drive the angle grinder to perform a slewing motion around the slewing centerline of the slewing bearing, thereby enabling the angle grinder to grind the workpiece. Compared to the prior art, which requires a worker to hold the angle grinder by hand to perform the grinding operation, the angle grinder in the grinding device is mounted on the slewing bearing, eliminating the need for a worker to hold the angle grinder by hand, which not only reduces safety hazards but also reduces the workload of the worker. Moreover, precisely because the angle grinder is mounted on the slewing bearing, it performs a slewing motion under the power of the slewing bearing, so that during the grinding process, the position of the angle grinder relative to the workpiece is fixed, thereby ensuring that the grinding surfaces are almost identical, thereby improving the grinding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of a grinding device provided in an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the installation of a connecting assembly and an angle grinder in a grinding device provided by an embodiment of the present invention;

[0027] Figure 3 A schematic diagram of a first partial structure of the installation of a connecting assembly and an angle grinder in a grinding device provided by an embodiment of the present invention;

[0028] Figure 4 A second partial structural diagram of the installation of the connecting assembly and the angle grinder in the grinding device provided by an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of a third partial structure of the installation of the connecting assembly and the angle grinder in the grinding device provided by an embodiment of the present invention;

[0030] Figure 6 A fourth partial structural diagram of the installation of the connecting assembly and the angle grinder in the grinding device provided by an embodiment of the present invention;

[0031] Figure 7 A top view of a frame in a grinding device provided in an embodiment of the present invention;

[0032] Figure 8 A schematic diagram of the partial structure of a frame in a grinding device provided in an embodiment of the present invention;

[0033] Figure 9 A schematic diagram of the connection between the clamping claw and the second slider in the grinding device provided by an embodiment of the present invention;

[0034] Figure 10 A schematic diagram of the partial structure of a grinding device provided in an embodiment of the present invention.

[0035] Icons: 10 - Mounting frame; 11 - Connecting arm; 12 - Claw; 13 - Second adjusting rod; 14 - Second slider; 15 - Connecting plate; 20 - Slewing bearing; 21 - Drive shaft; 50 - Motor; 60 - Reducer; 30 - Angle grinder; 40 - Connecting assembly; 41 - Mounting seat; 42 - Guide rail; 43 - First fastener; 44 - First adjusting rod; 45 - First slider; 46 - Sliding seat; 47 - Second fastener; 48 - Moving seat; 49 - Third fastener; 111 - Bottom plate; 112 - Side plate; 121 - Snap plate; 122 - Slot; 123 - Fourth fastener; 151 - Snap slot; 411 - Shaft hole; 412 - Guide slot; 421 - Mounting plate; 422 - Tail plate; 423 - Guide rod; 461 - Long hole; 1111 - Moving slot; 4221 - Mounting hole. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms “first” and “second” are only used for descriptive purposes and should not be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] Example

[0040] like Figure 1 and Figure 10As shown, the grinding device provided in this embodiment includes a mounting frame 10, a slewing support 20 and an angle grinder 30; the slewing support 20 is installed on the mounting frame 10, and the angle grinder 30 is installed on the slewing support 20. The slewing support 20 can drive the angle grinder 30 to rotate around the rotation center line of the slewing support 20, and the mounting frame 10 is used to connect the grinding workpiece.

[0041] Specifically, the mounting frame 10 is used to support the angle grinder 30 and the slewing bearing 20, thereby ensuring that the slewing bearing 20 has good stability when driving the angle grinder 30 to perform a slewing motion. At the same time, the mounting frame 10 can be installed on a grinding workpiece that needs to be ground, and in this case, the grinding workpiece may only require a local grinding operation. Alternatively, the mounting frame 10 can be fixed on a workbench for placing the grinding workpiece, and in this case, the grinding workpiece can be ground as a whole. Among them, the slewing bearing 20 is also connected to the motor 50 and the reduction gear 60. The slewing bearing 20 includes a gear transmission mechanism and a transmission shaft 21. The motor shaft of the motor 50 is connected to the power input shaft of the reduction gear 60 through a coupling, and the power output shaft of the reduction gear 60 is connected to the transmission shaft 21, and the transmission shaft 21 is connected to the gear transmission mechanism. The gear transmission mechanism includes multiple rotating gears, and the rotating gear facing the angle grinder 30 can be connected to the angle grinder 30. The rotation of the gear can drive the angle grinder 30 to rotate around the axis of the transmission shaft 21, that is, the axis of the transmission shaft 21 is the rotation center line of the slewing support 20.

[0042] Please continue to refer to Figure 1 - Figure 6 In actual use, the grinding device also includes a connecting assembly 40, one end of which is connected to the power output end of the slewing bearing 20 and the other end is connected to the angle grinder 30. The slewing bearing 20 drives the angle grinder 30 to rotate through the connecting assembly 40. In other words, the slewing gear in the slewing bearing 20 facing the angle grinder 30 can be fixed to the connecting assembly 40, thereby driving the connecting assembly 40 to rotate, and then driving the angle grinder 30 to rotate synchronously through the connecting assembly 40.

[0043] Compared to the prior art, which requires manual operation of the angle grinder, the present grinding device drives the angle grinder 30 to perform a rotational motion via the slewing bearing 20, eliminating the need for the worker to manually hold the angle grinder 30 during the grinding operation. This ensures that the worker can stay away from the grinding area of ​​the angle grinder 30 during the grinding operation and does not directly touch the angle grinder 30, thereby reducing safety hazards. Furthermore, if a worker manually holds the angle grinder for a long time, their arms will inevitably ache. The present grinding device frees the worker's hands, replacing manual operation with the motor 50, thus reducing the worker's workload. Furthermore, precisely because the present grinding device reduces the manual burden and does not cause arm pain, the problem of errors in the grinding area due to the worker's arm pain is avoided. Furthermore, during the grinding process, the slewing bearing 20 ensures that the position of the angle grinder 30 relative to the grinding workpiece remains unchanged, making the grinding surfaces nearly identical, thereby improving grinding accuracy.

[0044] Please continue to refer to Figure 1 - Figure 6 Preferably, the rotation diameter of the angle grinder 30 can be adjusted, and the distance between the angle grinder 30 and the grinding piece can be adjusted. Specifically, the distance between the angle grinder 30 and the rotation center line of the slewing support 20 can be adjusted by adjusting the connecting assembly 40, that is, the rotation diameter of the slewing motion of the angle grinder 30 can be adjusted to change the adjustment of the grinding amount of the grinding piece. At the same time, the distance between the angle grinder 30 and the grinding piece can also be adjusted by adjusting the connecting assembly 40. Taking the case where the rotation center line of the slewing support 20 extends in the vertical direction as an example, the grinding piece is placed below the angle grinder 30, and the angle grinder 30 can move up and down in the vertical direction to adjust the vertical distance from the grinding piece. At the same time, the angle grinder 30 can move in the horizontal direction to adjust the rotation diameter, thereby improving the flexibility of the grinding operation.

[0045] It should be noted that the adjustment method is not limited to the above one, and it is also possible to adjust only the rotation diameter of the angle grinder 30 or only the vertical distance between the angle grinder 30 and the grinding workpiece. Regardless of which method is used, as long as it can improve the flexibility of the grinding operation, it will be sufficient.

[0046] Please continue to refer to Figure 1 - Figure 6 Preferably, the connecting assembly 40 includes a mounting seat 41, a guide rail 42 and a first fastener 43; the angle grinder 30 is mounted on the guide rail 42, the guide rail 42 is slidably connected to the mounting seat 41, and the first fastener 43 is used to fix the guide rail 42 relative to the mounting seat 41.

[0047] Specifically, the upper surface of the mounting seat 41 is provided with an axial hole 411 for the transmission shaft 21 to extend therethrough, as well as a plurality of threaded holes for bolts to pass through. The mounting seat 41 is fixedly connected to the slewing gear located at the bottom of the slewing bearing 20 via the bolts passing through the threaded holes. A guide rail 42 is provided at the bottom of the mounting seat 41 and is movable along the length of the mounting seat 41. The guide rail 42 drives the angle grinder 30 to move synchronously, thereby adjusting the slewing diameter of the angle grinder 30. First fasteners 43 are respectively connected to the two first side walls extending along the length of the mounting seat 41. The first fasteners 43 pass through the corresponding first side walls and abut against the mounting plates 421 of the guide rails 42, thereby limiting the movement of the guide rails 42 relative to the mounting seat 41. Furthermore, the extension length of the first fasteners 43 relative to the first side walls can be adjusted to facilitate sliding and securing of the guide rails 42 relative to the mounting seat 41.

[0048] The first fasteners 43 can be bolts. Threaded holes are provided on the two first side walls of the mounting base 41, and the first fasteners 43 are threadedly engaged with the threaded holes. When the first fasteners 43 are tightened relative to the threaded holes, the guide rail 42 is restricted in position. When the first fasteners 43 are loosened relative to the threaded holes, the guide rail 42 can slide relative to the mounting base 41. Of course, the first fasteners 43 can also be screws, pins, or other structures, as long as they can restrict the movement of the guide rail 42 relative to the mounting base 41.

[0049] Please continue to refer to Figure 2 - Figure 6 In some embodiments, the connecting assembly 40 also includes a first adjusting rod 44 and a first slider 45 threadedly connected to the first adjusting rod 44; the first adjusting rod 44 is rotatably installed on the mounting seat 41, and the first slider 45 is connected to the guide rail 42. The first slider 45 can move relative to the first adjusting rod 44 to drive the guide rail 42 to move synchronously.

[0050] Specifically, the mounting base 41 further comprises two second sidewalls extending along its width. The two first sidewalls and the two second sidewalls together define a first mounting cavity. A first adjustment rod 44 is disposed within the first mounting cavity and extends along the length of the mounting base 41. Both ends of the first adjustment rod 44 are rotatably connected to the second sidewalls on the same side. A first slider 45 is threadedly coupled to the first adjustment rod 44. Rotating the first adjustment rod 44 allows the slider 45 to move along the length of the first adjustment rod 44. Furthermore, two guide rods 423 are fixed to the guide rail 42, extending in the direction of movement of the guide rail 42. The two guide rods 423 are spaced apart along the width of the guide rail 42. Two guide slots 412 are disposed within the first mounting cavity, spaced apart along the width of the mounting base 41. The first adjustment rod 44 is positioned between the two guide slots 412, with one guide rod 423 corresponding to each guide slot 412. The guide rods 423 can be inserted into and slide relative to the guide slots 412. The arrangement of the guide rod 423 and the guide groove 412 can improve the stability of the movement of the guide rail 42 relative to the mounting base 41. The length direction of the guide rail 42 is the moving direction of the guide rail 42.

[0051] Please continue to refer to Figure 2 - Figure 6 Preferably, the connecting assembly 40 further includes a sliding seat 46, to which the angle grinder 30 is connected. The sliding seat 46 is capable of vertical movement relative to the guide rail 42. Specifically, the sliding seat 46 is disposed at an end of the guide rail 42 away from the transmission shaft 21, and the angle grinder 30 is disposed on the sliding seat 46. The vertical movement of the sliding seat 46 relative to the guide rail 42 drives the angle grinder 30 to move synchronously, thereby adjusting the vertical distance between the angle grinder 30 and the grinding workpiece.

[0052] Please continue to refer to Figure 2 - Figure 6 In actual use, the connecting assembly 40 also includes a second fastener 47; a plurality of mounting holes 4221 arranged at intervals along the vertical direction are provided at one end of the guide rail 42 facing the sliding seat 46, and the second fastener 47 can pass through the sliding seat 46 and be connected to one of the mounting holes 4221.

[0053] Specifically, the guide rail 42 includes two mounting plates 421 spaced apart from each other along its width, and a tail plate 422 secured between the two mounting plates 421. The tail plate 422 is located on the side of the guide rail 42 away from the drive shaft 21. A first retaining groove 122 with a vertically C-shaped cross-section is provided on the tail plate 422. The bottom of the first retaining groove 122 is provided with a plurality of mounting holes 4221 arranged in a rectangular array. Furthermore, a second retaining groove 122 with a horizontally C-shaped cross-section is provided on the side of the sliding seat 46 facing the tail plate 422. The second retaining groove 122 cooperates with the first retaining groove 122. The second fastener 47 passes through the second slot 122 of the sliding seat 46 and connects to the mounting hole 4221 in the first slot 122. The first fastener 43 selectively connects to a row of mounting holes 4221 in the rectangular array, thereby adjusting the vertical position of the sliding seat 46 relative to the tail plate 422 and adjusting the vertical distance between the angle grinder 30 and the grinding workpiece. The bottom of the sliding seat 46 is provided with an opening to facilitate the passage of the tail plate 422 mounted on the guide rail 42, thereby reducing the restriction of the tail plate 422 on the vertical movement of the sliding seat 46.

[0054] Please continue to refer to Figure 2 - Figure 6 In this embodiment, a movable seat 48 for connecting the angle grinder 30 is provided at the bottom of the sliding seat 46. The movable seat 48 can move relative to the sliding seat 46 to drive the angle grinder 30 to move synchronously. Specifically, the bottom surface of the sliding seat 46 is provided with two long holes 461 whose lengths extend along the length direction of the guide rail 42, and the two long holes 461 are arranged at intervals along the width direction of the guide rail 42. The third fastener 49 passes through the movable seat 48 and extends into the long hole 461, and the third fastener 49 can move back and forth along the length direction of the long hole 461. The angle grinder 30 is fixed to the movable seat 48, and then the movement of the third fastener 49 relative to the long hole 461 drives the movable seat 48 to move relative to the sliding seat 46 along the length direction of the guide rail 42, and the angle grinder 30 moves synchronously with the movable seat 48.

[0055] The second fastener 47 and the third fastener 49 can both be screws. Of course, the second fastener 47 and the third fastener 49 can also be other rod-shaped structures, as long as they can respectively achieve position adjustment of the angle grinder 30.

[0056] When the third fastener 49 is a screw, a first nut is provided at the end of the third fastener 49 facing the angle grinder 30, and a second nut is provided at the end of the third fastener 49 facing the sliding seat 46. The upper surface of the first nut can abut against the movable seat 48, and the lower surface of the second nut can abut against the sliding seat 46. In actual use, when the first nut and the second nut are tightened, the position of the third fastener 49 relative to the elongated hole 461 is fixed, that is, the movable seat 48 is fixed relative to the sliding seat 46; when the first nut and the second nut are loosened, the third fastener 49 can move along the length of the elongated hole 461, thereby driving the angle grinder 30 to move synchronously via the movable seat 48.

[0057] Please continue to refer to Figure 1 、 Figure 7 - Figure 9 Preferably, the mounting frame 10 includes a connecting arm 11 and a claw 12 connected to the connecting arm 11, and the claw 12 can move relative to the connecting arm 11 along the length direction of the connecting arm 11, and the claw 12 is used to connect the polishing piece.

[0058] Specifically, the slewing bearing 20 also includes a slewing housing, a gear transmission mechanism mounted within the housing, and a connecting arm 11 fixed to the housing. The connecting arm 11 extends horizontally from the housing in a direction away from the slewing centerline of the slewing bearing 20, that is, the connecting arm 11 extends along the slewing diameter of the angle grinder 30. A clamping plate 121 is provided at one end of the jaw 12 away from the connecting arm 11. The clamping plate 121 is connected to the bottom end of the jaw 12 via a fourth fastener 123. The fourth fastener 123 can be loosened to loosen the clamping plate 121 and the jaw 12, or tightened to tighten the clamping plate 121 and the jaw 12. The bottom end of the clamping jaw 12 is provided with a slot 122. The edge of the workbench where the grinding workpiece is placed, or the edge of the grinding workpiece that does not need to be ground, can be inserted into the slot 122. The clamping plate 121 is then tightened by the fourth fastener 123 to secure the clamping jaw 12 relative to the grinding workpiece. The bottom of the slot 122 is provided with a texture to reduce wear.

[0059] Please continue to refer to Figure 7 - Figure 9 In actual use, the mounting bracket 10 also includes a second adjusting rod 13 rotatably connected to the connecting arm 11 and a second slider 14 threadedly screwed to the second adjusting rod 13, and the claw 12 is connected to the second slider 14; the second slider 14 can move relative to the second adjusting rod 13 along the length direction of the second adjusting rod 13 to drive the claw 12 to move synchronously.

[0060] Specifically, the connecting arm 11 includes a bottom plate 111 and a plurality of side plates 112 fixed to the upper surface of the bottom plate 111. The side plates 112 and the bottom plate 111 together form a second mounting cavity for mounting the second adjustment rod 13. A base is provided in the second mounting cavity. The length of the second adjustment rod 13 extends along the length direction of the connecting arm 11. One end of the second adjustment rod 13 is rotatably connected to the base, and the other end is rotatably connected to a side plate 112 located at the extended end of the bottom plate 111. The second slider 14 is screwed onto the second adjustment rod 13. Rotating the second adjustment rod 13 can drive the second slider 14 to move along the length direction of the second adjustment rod 13. A connecting plate 15 is fixed to the bottom of the second slider 14. The connecting plate 15 is fixed to the top end of the claw 12, and a snap-in groove 151 is provided on both sides of the connecting plate 15 along the width direction of the connecting arm 11. At the same time, the bottom plate 111 is provided with a movable groove 1111 extending along the length direction of the connecting arm 11. The edge of the movable groove 1111 can be embedded in the clamping groove 151, thereby improving the stability of the clamping claw 12 moving with the second slider 14 relative to the first adjusting rod 44.

[0061] Please continue to refer to Figure 1 、 Figure 7 and Figure 8 Preferably, there are multiple connecting arms 11, and the multiple connecting arms 11 are arranged at intervals around the rotation center line of the slewing support 20, and each connecting arm 11 is connected to a claw 12.

[0062] In this embodiment, there are three connecting arms 11, and the three connecting arms 11 are arranged at 120-degree intervals around the axis of the transmission shaft 21. There are three clamping claws 12, and each connecting arm 11 is connected to a corresponding clamping claw 12, thereby achieving stable fixation of the grinding device relative to the grinding workpiece.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A grinding device, characterized in that: It comprises a mounting frame (10), a slewing bearing (20), an angle grinder (30) and a connecting assembly (40); The slewing bearing (20) is mounted on the mounting frame (10), the angle grinder (30) is mounted on the slewing bearing (20), the slewing bearing (20) can drive the angle grinder (30) to perform slewing motion around the slewing centerline of the slewing bearing (20), and the mounting frame (10) is used to connect the grinding piece; The rotation diameter of the angle grinder (30) and the distance from the grinding piece can be adjusted; One end of the connecting assembly (40) is connected to the power output end of the slewing bearing (20), and the other end is connected to the angle grinder (30); the slewing bearing (20) drives the angle grinder (30) to perform slewing motion through the connecting assembly (40); The connecting assembly (40) comprises a mounting seat (41), a guide rail (42) and a sliding seat (46); the angle grinder (30) is mounted on the guide rail (42), the guide rail (42) is slidably connected to the mounting seat (41), the angle grinder (30) is connected to the sliding seat (46), and the sliding seat (46) can move in a vertical direction relative to the guide rail (42); The grinding piece is placed below the angle grinder (30); The mounting frame (10) comprises a connecting arm (11) and a claw (12) connected to the connecting arm (11), wherein the claw (12) is movable relative to the connecting arm (11) along the length direction of the connecting arm (11), and the claw (12) is used to connect the polishing piece; There are multiple connecting arms (11), and the multiple connecting arms (11) are arranged at intervals around the rotation center line of the slewing support (20), and each connecting arm (11) is connected to the clamping claw (12).

2. The grinding device according to claim 1, characterized in that: The connecting assembly (40) further includes a first fastener (43), wherein the first fastener (43) is used to fix the guide rail (42) relative to the mounting seat (41).

3. The grinding device according to claim 2, characterized in that: The connecting assembly (40) further includes a first adjusting rod (44) and a first sliding block (45) threadedly connected to the first adjusting rod (44); The first adjusting rod (44) is rotatably mounted on the mounting seat (41), the first slider (45) is connected to the guide rail (42), and the first slider (45) can move relative to the first adjusting rod (44) to drive the guide rail (42) to move synchronously.

4. The grinding device according to claim 1, characterized in that: The connecting assembly (40) further includes a second fastener (47); The guide rail (42) is provided with a plurality of mounting holes (4221) arranged at intervals in the vertical direction at one end facing the sliding seat (46), and the second fastener (47) can pass through the sliding seat (46) and be connected to one of the mounting holes (4221).

5. The grinding device according to claim 1, characterized in that: The mounting frame (10) further comprises a second adjusting rod (13) rotatably connected to the connecting arm (11) and a second slider (14) threadedly connected to the second adjusting rod (13), and the claw (12) is connected to the second slider (14); The second sliding block (14) can move relative to the second adjusting rod (13) along the length direction of the second adjusting rod (13) to drive the claw (12) to move synchronously.

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