A profile through-hole grinding device

Abstract

The present invention discloses a profile through-hole grinding device, which belongs to the technical field of grinding equipment, and includes a base cylinder, a grinding assembly, an inner positioning assembly and an outer positioning assembly, wherein the grinding assembly includes a swivel mounted on the base cylinder, two grinding units symmetrically arranged on both sides of the swivel and a driving unit, and the grinding unit includes a first guide rail fixed on the swivel, a first guide rod slidably mounted on the first guide rail, and a grinding head rotatably mounted on the end of the first guide rod. The inner positioning assembly and the outer positioning assembly provided by the present invention facilitate positioning the grinding head on the edge line of the waist-shaped through hole, so that the grinding head can accurately grind the circular arc segment and the straight line segment of the waist-shaped through hole. The present invention is particularly suitable for chamfering and deburring waist-shaped through holes or waist-shaped grooves on workpieces that are not convenient to place on a chamfering machine, and solves the problem in the prior art that manual grinding and chamfering have low precision and are inconvenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, and in particular to a profile through-hole grinding device. Background Art

[0002] Through-hole grinding usually refers to deburring and chamfering the edge of the hole. Existing chamfering machines are generally suitable for chamfering the outer convex edge of the workpiece, but not for the inner hole. For circular through-holes, a conical grinding head is generally used for chamfering. Since the diameter of the cross section of the conical grinding head changes from small to large, it can be used for chamfering circular holes of various sizes. However, there are currently few equipment for chamfering waist-shaped through-holes. For workpieces that are not convenient to fix on tooling, how to deburr and chamfer waist-shaped through-holes is a technical problem that needs to be solved urgently.

[0003] Therefore, the present invention provides a profile through-hole grinding device. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a profile through-hole grinding device, which is provided with an inner positioning component, an outer positioning component and a grinding component to facilitate chamfering and deburring of waist-shaped through-holes.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a profile through-hole grinding device, comprising:

[0006] Base tube;

[0007] A grinding assembly, the grinding assembly comprising a rotating ring sleeved on a base cylinder, two grinding units symmetrically arranged on both sides of the rotating ring, and a driving unit, the grinding unit comprising a first guide rail fixed on the rotating ring, a first guide rod slidably mounted on the first guide rail, and a grinding head rotatably mounted on the end of the first guide rod, the driving unit is used to drive the grinding head to rotate;

[0008] An inner positioning assembly, the inner positioning assembly comprising two inner positioning units symmetrically arranged on the base cylinder, the inner positioning unit comprising a second guide rail fixed on the outer wall of the base cylinder and a second guide rod slidably mounted on the second guide rail, and at least two top wheels are arranged at one end of the second guide rod away from the base cylinder;

[0009] An external positioning assembly, the external positioning assembly comprising two external positioning units symmetrically arranged on the base cylinder, the external positioning unit comprising a third guide rail fixed on the outer wall of the base cylinder and a third guide rod slidably mounted on the third guide rail, and two pressure wheels are arranged on the third guide rod;

[0010] The top wheels on the two inner positioning units can move in opposite directions and abut against the inner wall of the waist-shaped through hole to be ground, and the pressing wheel can abut against the surface of the profile;

[0011] The grinding assembly has two working states; in the first working state, the rotating ring rotates to make the grinding head move in an arc, and the grinding head grinds the circular arc segment of the waist-shaped through hole; in the second working state, the rotating ring stops rotating, and the two grinding heads move with the base tube to grind the two straight line segments of the waist-shaped through hole respectively.

[0012] Preferably, the polishing unit further comprises:

[0013] A spline sleeve, the spline sleeve is rotatably mounted on the first guide rail;

[0014] A spline shaft, the spline shaft is rotatably mounted on the first guide rod and is spline-matched with the spline sleeve;

[0015] Wherein, the shaft body of the grinding head and the spline shaft are transmission connected via a bevel gear set.

[0016] Preferably, the driving unit comprises:

[0017] A driving shaft, the driving shaft being rotatably mounted on the side wall of the base cylinder;

[0018] A transmission ring, wherein a first tooth pattern is fixed on the outer wall of the spline sleeve, the transmission ring is rotatably mounted on the rotating ring, and the transmission ring is provided with a second tooth pattern meshing with the first tooth pattern;

[0019] Wherein, the driving shaft and the transmission ring are connected via a gear set.

[0020] Preferably, a handle is fixed on the third guide rail, a motor is arranged in the handle, and the output shaft of the motor is connected to the drive shaft through a gear set.

[0021] Preferably, a driving sleeve is rotatably mounted on the rotating ring, and two first swing arms are symmetrically fixed on the side wall of the driving sleeve. The two first swing arms are hinged with first connecting rods, and the ends of the two first connecting rods away from the corresponding first swing arms are respectively hinged to two first guide rods.

[0022] Preferably, a screw rod is rotatably mounted on one of the first guide rails, a first threaded sleeve is threadedly mounted on the screw rod, and the first threaded sleeve is fixedly connected to an adjacent first guide rod.

[0023] Preferably, a first adjusting rod for driving the screw to rotate is provided on one side of the screw, and the first adjusting rod is transmission-connected to the screw via a bevel gear set.

[0024] Preferably, a rotating shaft is rotatably installed in the base cylinder, and two second swing arms are symmetrically fixed on the side wall of the lower end of the rotating shaft, and the two second swing arms are hinged with second connecting rods, and the two second connecting rods are respectively hinged to the two second guide rods; two third swing arms are symmetrically fixed on the side wall of the upper end of the rotating shaft, and the two third swing arms are hinged with third connecting rods, and the two third connecting rods are respectively hinged to the two third guide rods.

[0025] Preferably, a second adjusting rod parallel to the third guide rod is provided on the upper side of the third guide rail, a second threaded sleeve is threadedly mounted on the second adjusting rod, and the second threaded sleeve is fixedly connected to one of the third guide rods.

[0026] Preferably, a first limit block is fixed on the inner wall of the rotating ring, and a second limit block is fixed on the outer wall of the base cylinder, and the first limit block cooperates with the second limit block to limit the maximum angle of rotation of the rotating ring on the base cylinder.

[0027] The beneficial effects of the present invention are:

[0028] The inner positioning assembly and the outer positioning assembly provided by the present invention are convenient for positioning the grinding head on the edge line of the waist-shaped through hole. The pressure wheel and the top wheel can both be adjusted in position, so that the top wheel can be pressed against the inner wall of the waist-shaped through hole, and then the pressure wheel can be pressed against the surface of the profile, so that the rotation of the device can be limited, so that the device can only move along the straight line segment of the waist-shaped through hole. The grinding assembly provided by the present invention includes two grinding heads, and the two grinding heads rotate under the action of the driving unit. When the first guide rod moves on the first guide rail and the grinding head is pressed against the edge line of the waist-shaped through hole, the grinding head can grind the edge of the waist-shaped through hole. The two grinding heads are rotated around the base cylinder as the center, so that the grinding head can accurately grind the arc segment and the straight line segment of the waist-shaped through hole. The present invention is particularly suitable for chamfering and deburring waist-shaped through holes or waist-shaped grooves on workpieces that are inconvenient to place on a chamfering machine, and solves the problem of low precision and inconvenient operation of manual chamfering in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A stereoscopic diagram of the overall structure of a profile through-hole grinding device provided in an embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of the present invention in the process of polishing the edge line of the waist-shaped through hole.

[0032] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0033] Figure 4 This is a front side perspective stereoscopic view of the overall structure of the present invention after the shell is omitted.

[0034] Figure 5 This is a rear side perspective view of the overall structure of the present invention with the shell omitted.

[0035] Figure 6 It is a schematic diagram of the cooperation between the base cylinder and the rotating ring of the present invention.

[0036] Figure 7 It is a schematic diagram of the present invention in the second working state.

[0037] Figure 8 It is a schematic diagram of the present invention in the first working state.

[0038] Description of reference numerals:

[0039] 1. Base cylinder, 2. Rotating ring, 3. First guide rail, 4. First guide rod, 5. Grinding head, 6. Shaft body, 7. Second guide rail, 8. Second guide rod, 9. Top wheel, 10. Third guide rail, 11. Third guide rod, 12. Pressure wheel, 13. Spline sleeve, 14. Spline shaft, 15. Drive shaft, 16. Transmission ring, 17. First tooth pattern, 18. Second tooth pattern, 19. Handle, 20. Drive sleeve, 21. First swing arm, 22. First connecting rod, 23. Screw, 24. First threaded sleeve, 25. First adjusting rod, 26. Rotating shaft, 27. Second swing arm, 28. Second connecting rod, 29. Third swing arm, 30. Third connecting rod, 31. Second adjusting rod, 32. Second threaded sleeve, 33. First limit block, 34. Second limit block, 35. Shell. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Embodiment 1:

[0042] like Figures 1 to 8As shown, the present invention provides a profile through-hole grinding device, which is convenient for manual hand-held grinding of waist-shaped through-holes of workpieces that are inconvenient to be fixed on a chamfering machine, so as to achieve deburring and chamfering of waist-shaped through-holes. The present invention specifically includes a handle 19, a base cylinder 1, a grinding assembly, an inner positioning assembly and an outer positioning assembly. Among them, the handle 19 is convenient for manual holding of the device. A lithium battery and a motor are arranged in the handle 19, and the lithium battery drives the motor to work.

[0043] like Figure 4 and Figure 5 As shown, the inner positioning assembly, the outer positioning assembly and the grinding assembly are all arranged on the base tube 1, and the end of the handle 19 is fixedly connected to the base tube 1 through a bracket. Specifically, the grinding assembly includes a rotating ring 2 sleeved on the base tube 1, and the rotating ring 2 can rotate on the base tube 1. Two grinding units are symmetrically arranged on both sides of the rotating ring 2. The two grinding units have the same structure and both include a first guide rail 3, a first guide rod 4 and a grinding head 5, wherein the first guide rail 3 is fixedly connected to the rotating ring 2; the first guide rod 4 is movably inserted on the first guide rail 3 and can slide along the first guide rail 3; the shaft body 6 of the grinding head 5 is rotatably installed at the end of the first guide rod 4, so that when the first guide rod 4 slides on the first guide rail 3, the distance between the grinding head 5 and the base tube 1 can be changed, and then the spacing between the two grinding heads 5 can be changed, so that waist-shaped through holes within a certain width range can be ground.

[0044] In order to symmetrically adjust the distance between the two grinding heads 5, the grinding unit provided in the present invention further includes a driving sleeve 20, two first swing arms 21 and two first connecting rods 22, wherein the driving sleeve 20 is sleeved on the rotating ring 2 and can rotate on the rotating ring 2, the two first swing arms 21 are symmetrically fixed on both sides of the driving sleeve 20, the two first connecting rods 22 are respectively hinged on the two first swing arms 21, and the ends of the two first connecting rods 22 away from the first swing arms 21 are respectively hinged on the two first guide rods 4. In this way, when the driving sleeve 20 is rotated, the first swing arm 21 on the driving sleeve 20 will push the first connecting rod 22 to move, and then the first connecting rod 22 will push the first guide rod 4 to move on the first guide rail 3. Since the first swing arm 21 and the first connecting rod 22 are symmetrically arranged, when the driving sleeve 20 is rotated, the two grinding heads 5 can be symmetrically moved with the base tube 1 as the center. Since the two grinding heads 5 can be connected via the driving sleeve 20 , in other words, if one of the first guide rods 4 is driven to move on the first guide rail 3 , the other first guide rod 4 can also be moved via the driving sleeve 20 .

[0045] Therefore, in order to facilitate the adjustment and fixing of the spacing of the grinding heads 5, as Figure 4 and Figure 5As shown, in the present invention, a rotatable screw rod 23 is installed on one of the first guide rails 3, and the sliding direction of the screw rod 23 and the first guide rod 4 on the first guide rail 3 is parallel, and a first threaded sleeve 24 is fixed on the hinge axis of the first guide rod 4 and the first connecting rod 22, and the screw rod 23 and the first threaded sleeve 24 are threadedly matched. When the screw rod 23 is driven to rotate, the first threaded sleeve 24 will move on the screw rod 23, thereby driving the first guide rod 4 to move on the first guide rail 3, and driving the first guide rod 4 on the other side to move symmetrically through the driving sleeve 20.

[0046] Taking into account that a shell 35 for protection is provided on the outside of the grinding assembly, in order to facilitate the adjustment of the screw rod 23, the present invention has a first adjusting rod 25 rotatably mounted on the shell 35, the shell 35 is fixedly connected to the first guide rail 3, one end of the first adjusting rod 25 is sleeved with a bevel gear, and one end of the screw rod 23 is also fixed with a bevel gear, through the meshing of the two bevel gears, the positions of the two grinding heads 5 can be symmetrically adjusted when the first adjusting rod 25 is rotated.

[0047] In order to allow the two grinding heads 5 to be positionally adjusted and driven to rotate by the motor, the grinding assembly of the present invention further includes a driving unit for driving the grinding heads 5 to rotate. The grinding unit further includes a spline sleeve 13 rotatably mounted on the first guide rail 3, a spline shaft 14 is splinedly mounted in the spline sleeve 13, and the spline shaft 14 is rotatably mounted on the first guide rod 4. When the first guide rod 4 moves on the first guide rail 3, the spline shaft 14 can be extended and retracted in the spline sleeve 13 while maintaining the transmission capacity. Figure 4 As shown, the shaft body 6 of the grinding head 5 is connected to the spline shaft 14 through a pair of bevel gear sets. Therefore, the two grinding heads 5 can be rotated by only driving the two spline sleeves 13 to rotate. To this end, the driving unit designed in the present invention includes a driving shaft 15 rotatably mounted on the side wall of the base cylinder 1. The driving shaft 15 is connected to the output shaft of the motor through a pair of spur gear sets. A transmission ring 16 is rotatably mounted on the rotating ring 2. The inner side of the transmission ring 16 is a gear ring. The end of the driving shaft 15 is fixed with a gear meshing with the gear ring. Therefore, the motor can drive the transmission ring 16 to rotate through the driving shaft 15.

[0048] like Figure 4 As shown, a first tooth pattern 17 is fixed on the outer wall of the spline sleeve 13, and a second tooth pattern 18 meshing with the first tooth pattern 17 is provided on the transmission ring 16. Therefore, when the motor is started, the transmission ring 16 can be driven to rotate through the driving shaft 15, and then the spline sleeve 13 is driven to rotate through the meshing of the first tooth pattern 17 and the second tooth pattern 18, so that one motor drives the two grinding heads 5 to rotate, and the grinding heads 5 can also move relatively.

[0049] Embodiment 2:

[0050] Based on the first embodiment, Figure 4As shown, the inner positioning assembly designed by the present invention specifically includes two inner positioning units, which are symmetrically fixed on the outer wall of the base tube 1. Each inner positioning unit includes a second guide rail 7 and a second guide rod 8, wherein the second guide rail 7 is fixed on the outer wall of the base tube 1, and the second guide rod 8 is slidably installed on the second guide rail 7, and at least two top wheels 9 are rotatably installed on the end of the second guide rod 8 away from the base tube 1. Figure 1 and Figure 8 As shown, the line connecting the two top wheels 9 on one inner positioning unit is parallel to the line connecting the two top wheels 9 on the other inner positioning unit, and the line connecting the top wheel 9 on one inner positioning unit and the top wheel 9 on the other inner positioning unit is perpendicular to and intersects with the axis line of the base tube 1.

[0051] In order to facilitate driving the two second guide rods 8 to move symmetrically, the present invention has a rotating shaft 26 rotatably installed in the base cylinder 1. Figure 5 As shown, two second swing arms 27 are symmetrically fixed on the outer wall of the lower end of the rotating shaft 26, and the two second swing arms 27 are hinged with second connecting rods 28, and the two second connecting rods 28 are respectively hinged with the two second guide rods 8, so that when the rotating shaft 26 rotates, the two second swing arms 27 can drive the second connecting rods 28 to move, and then symmetrically drive the two second guide rods 8 to move on the second guide rails 7. The top wheel 9 can be arranged on the inner side of the waist-shaped through hole, and then the two second guide rods 8 are driven to move, so that the top wheels 9 on the two inner positioning units are respectively against the inner walls of the two straight segments of the waist-shaped through hole.

[0052] Embodiment three:

[0053] On the basis of the first and second embodiments, the outer positioning component designed by the present invention can be linked with the inner positioning component. Figure 4 and Figure 5 As shown, the external positioning assembly includes two external positioning units, which are symmetrically arranged on the outer wall of the top of the base tube 1. Each external positioning unit includes a third guide rail 10 fixed on the outer wall of the base tube 1 and a third guide rod 11 slidably mounted on the third guide rail 10, and two pressure wheels 12 are rotatably mounted on one end of the third guide rod 11 away from the base tube 1. Figure 2 and Figure 3 As shown, the third guide rod 11 is L-shaped. When in use, the pressing wheel 12 is pressed against the surface of the profile, and the top wheel 9 is located on the inner side of the waist-shaped through hole. Then the top wheel 9 is pressed against the inner wall of the waist-shaped through hole, so that the user only needs to keep pressing the device against the profile, and the relative position of the grinding head 5 and the waist-shaped through hole can be maintained under the action of the top wheel 9 and the pressing wheel 12.

[0054] Since the conventional chamfering specification size variation range is not large, the second guide rod 8 is linked with the third guide rod 11 for easy operation. The specific implementation method is: two third swing arms 29 are symmetrically fixed on the upper end side wall of the rotating shaft 26, and the two third swing arms 29 are hinged with third connecting rods 30, and the two third connecting rods 30 are respectively hinged with the two third guide rods 11. Since the second swing arm 27 and the third swing arm 29 are both fixedly connected to the rotating shaft 26, when the rotating shaft 26 rotates, the second swing arm 27 and the third swing arm 29 will rotate synchronously.

[0055] The structure for adjusting the position of the third guide rod 11 on the third guide rail 10 in the present invention is similar to the structure for adjusting the position of the first guide rod 4 on the first guide rail 3 in the grinding unit. In the present invention, a second adjustment rod 31 parallel to the third guide rod 11 is rotatably mounted on the handle 19 on the upper side of the third guide rail 10, a second threaded sleeve 32 is threadedly mounted on the second adjustment rod 31, and a hinge shaft of the third guide rod 11 and the third connecting rod 30 is fixedly connected to the second threaded sleeve 32, so that when the second adjustment rod 31 is rotated, the third guide rod 11 can be driven to move on the third guide rail 10, and then the third guide rod 11 on the other side is driven to move symmetrically through the rotating shaft 26, and the second guide rod 8 below is driven to move on the second guide rail 7 at the same time.

[0056] Working process: When in use, first rotate the second adjusting rod 31 to roughly adjust the distance between the two inner positioning units so that the pressing wheel 12 can be against the surface of the profile and the top wheel 9 can be located inside the waist-shaped through hole. Then continue to rotate the second adjusting rod 31. Figure 8 As shown, the top wheel 9 is pressed against the inner wall of the waist-shaped through hole. Under the limiting effect of the four top wheels 9, the base cylinder 1 and the handle 19 cannot rotate and can only move along the straight section of the waist-shaped through hole. Start the motor to make the two grinding heads 5 rotate. The user can operate the first adjustment rod 25 to move the grinding head 5 toward the edge of the waist-shaped through hole to grind the waist-shaped through hole. Figure 8 As shown, under the limiting effect of the top wheel 9, the center of the base cylinder 1 can be aligned with the center of the circular arc segment of the waist-shaped through hole. At this time, by toggling the first adjustment rod 25, the grinding head 5 can be rotated around the base cylinder 1, so that the grinding head 5 can grind the circular arc segment of the waist-shaped through hole. In order to facilitate the grinding of the straight line segment of the waist-shaped through hole, as shown in FIG. Figure 6 As shown, a first limit block 33 is fixed on the inner wall of the rotating ring 2, and a second limit block 34 is fixed on the outer wall of the base cylinder 1. When the rotating ring 2 rotates to a certain angle, the first limit block 33 will abut against the second limit block 34 to limit the rotating ring 2 from continuing to rotate, thereby facilitating the user to adjust the two grinding heads 5 to Figure 7 The state of the straight line segment perpendicular to the waist-shaped through hole is shown. At this time, by pushing the handle 19 to move the handle 19 along the straight line segment of the waist-shaped through hole, the two grinding heads 5 can grind the two straight line segments respectively, thereby achieving precise grinding of the edge line of the waist-shaped through hole.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A profile through-hole grinding device, characterized in that: include: Base tube (1); A grinding assembly, the grinding assembly comprising a rotating ring (2) sleeved on a base cylinder (1), two grinding units symmetrically arranged on both sides of the rotating ring (2), and a driving unit, the grinding unit comprising a first guide rail (3) fixed on the rotating ring (2), a first guide rod (4) slidably mounted on the first guide rail (3), and a grinding head (5) rotatably mounted on the end of the first guide rod (4), the driving unit being used to drive the grinding head (5) to rotate; An inner positioning assembly, the inner positioning assembly comprising two inner positioning units symmetrically arranged on the base cylinder (1), the inner positioning units comprising a second guide rail (7) fixed on the outer wall of the base cylinder (1) and a second guide rod (8) slidably mounted on the second guide rail (7), and at least two top wheels (9) are arranged at one end of the second guide rod (8) away from the base cylinder (1); An external positioning assembly, the external positioning assembly comprising two external positioning units symmetrically arranged on the base cylinder (1), the external positioning units comprising a third guide rail (10) fixed on the outer wall of the base cylinder (1) and a third guide rod (11) slidably mounted on the third guide rail (10), the third guide rod (11) being provided with two pressure wheels (12); The top wheels (9) on the two inner positioning units can move in opposite directions and abut against the inner wall of the waist-shaped through hole to be ground, and the pressing wheel (12) can abut against the surface of the profile; The grinding assembly has two working states; in the first working state, the rotating ring (2) rotates, causing the grinding head (5) to move in an arc, and the grinding head (5) grinds the circular arc segment of the waist-shaped through hole; in the second working state, the rotating ring (2) stops rotating, and the two grinding heads (5) move with the base tube (1) to grind the two straight line segments of the waist-shaped through hole respectively.

2. A profile through-hole grinding device as claimed in claim 1, characterized in that: The grinding unit also includes: A spline sleeve (13), wherein the spline sleeve (13) is rotatably mounted on the first guide rail (3); A spline shaft (14), the spline shaft (14) being rotatably mounted on the first guide rod (4) and being spline-matched with the spline sleeve (13); The shaft body (6) of the grinding head (5) and the spline shaft (14) are connected via a bevel gear set.

3. A profile through-hole grinding device as claimed in claim 2, characterized in that: The driving unit comprises: A drive shaft (15), the drive shaft (15) being rotatably mounted on a side wall of the base cylinder (1); A transmission ring (16), wherein a first tooth pattern (17) is fixed on an outer wall of the spline sleeve (13), the transmission ring (16) is rotatably mounted on the rotating ring (2), and the transmission ring (16) is provided with a second tooth pattern (18) meshing with the first tooth pattern (17); The drive shaft (15) and the transmission ring (16) are connected via a gear set.

4. A profile through-hole grinding device as claimed in claim 3, characterized in that: A handle (19) is fixed on the third guide rail (10), a motor is arranged in the handle (19), and an output shaft of the motor is connected to a drive shaft (15) via a gear set.

5. A profile through-hole grinding device as claimed in claim 1, characterized in that: A driving sleeve (20) is rotatably mounted on the rotating ring (2), two first swing arms (21) are symmetrically fixed on the side wall of the driving sleeve (20), and a first connecting rod (22) is hinged to each of the two first swing arms (21), and one end of the two first connecting rods (22) away from the corresponding first swing arms (21) is hinged to the two first guide rods (4) respectively.

6. A profile through-hole grinding device as claimed in claim 5, characterized in that: A screw rod (23) is rotatably mounted on one of the first guide rails (3), a first threaded sleeve (24) is threadedly mounted on the screw rod (23), and the first threaded sleeve (24) is fixedly connected to an adjacent first guide rod (4).

7. A profile through-hole grinding device as claimed in claim 6, characterized in that: A first adjusting rod (25) for driving the screw rod (23) to rotate is provided on one side of the screw rod (23); the first adjusting rod (25) is connected to the screw rod (23) via a bevel gear set.

8. A profile through-hole grinding device as claimed in claim 1, characterized in that: A rotating shaft (26) is rotatably mounted in the base cylinder (1); two second swing arms (27) are symmetrically fixed on the side wall at the lower end of the rotating shaft (26); the two second swing arms (27) are hingedly connected to a second connecting rod (28); the two second connecting rods (28) are respectively hingedly connected to the two second guide rods (8); and two third swing arms (29) are symmetrically fixed on the side wall at the upper end of the rotating shaft (26); the two third swing arms (29) are hingedly connected to a third connecting rod (30); the two third connecting rods (30) are respectively hingedly connected to the two third guide rods (11).

9. A profile through-hole grinding device as claimed in claim 8, characterized in that: A second adjusting rod (31) parallel to the third guide rod (11) is arranged on the upper side of the third guide rail (10); a second threaded sleeve (32) is threadedly mounted on the second adjusting rod (31); and the second threaded sleeve (32) is fixedly connected to one of the third guide rods (11).

10. A profile through-hole grinding device as claimed in claim 1, characterized in that: A first limit block (33) is fixed on the inner wall of the rotating ring (2), and a second limit block (34) is fixed on the outer wall of the base cylinder (1). The first limit block (33) and the second limit block (34) cooperate to limit the maximum angle of rotation of the rotating ring (2) on the base cylinder (1).

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