Machining center positioning tool capable of avoiding repeated disassembly and assembly and use method of machining center positioning tool

Abstract

The invention discloses a machining center positioning tool capable of avoiding repeated disassembly and assembly, and relates to the technical field of machining centers, the machining center positioning tool comprises a base, the base comprises a bottom plate, the top end of the bottom plate is fixedly connected with a sleeve shell, the inner wall of the sleeve shell is rotatably connected with a rotating seat, and the bottom end of the rotating seat is fixedly connected with a limiting fluted disc located in the sleeve shell; the inner wall of the sleeve shell is fixedly sleeved with a gear ring, and the gear ring is engaged with the outer wall of the fluted disc. A fixing plate is lifted upwards, a limiting fluted disc is separated from a gear ring, then the fixing plate is rotated, so that a workpiece can rotate integrally, then the fixing plate is loosened, the fixing plate falls, the limiting fluted disc is engaged with the gear ring, the angle of the workpiece is limited, and in the process of machining the workpiece, the workpiece is not prone to falling off. The workpiece can be integrally rotated more conveniently according to machining requirements, and the workpiece does not need to be disassembled.

Description

Technical Field

[0001] The invention relates to the technical field of machining centers, and in particular to a machining center positioning tool capable of avoiding repeated disassembly and assembly and a use method thereof. Background Art

[0002] In mechanical processing production, machined fixtures are widely used. There are many types of vise fixtures or base plate fixtures used in drilling holes in machining centers, but they all have certain defects or poor compatibility. There is currently no good solution to solve the problem of compatibility and quick switching when there are chrome-plated holes to be processed on flange structure mechanical parts of the same type.

[0003] The existing patent (Announcement No.: CN212552808U) discloses a positioning tool for a machining center, including at least one group of positioning components, each group of the positioning components includes two positioning pins, a fixed screw, a pressure plate, a pressure block, and a positioning plate, the two positioning pins are detachably arranged on a bottom plate, the fixed screw is vertically arranged on the bottom plate, and the fixed screw is located between the two positioning pins, the pressure plate is sleeved on the fixed screw, and a clamping nut for locking the pressure plate is arranged on the fixed screw, the inner walls of the two ends of the pressure plate are respectively provided with the pressure blocks, and the bottom plate is arranged on the installation The mounting plate is provided with sliding structures on both sides of the bottom plate, and the positioning plate is provided on the sliding structure. The positioning plate and the two positioning pins are located on the same straight line. A pressure plate is mounted on the fixing bolts between the two positioning pins, and pressure blocks are respectively provided on the inner walls at both ends of the pressure plate. One positioning pin is used to align one workpiece to be processed, and the workpiece to be processed on the positioning pin is pressed and aligned by locking the pressure blocks at both ends of the pressure plate. The positioning end face of each workpiece to be processed is positioned by the positioning plate, so that one set of positioning components can clamp two workpieces to be processed at the same time, and the clamping is convenient, the processing can be quickly switched, and the work efficiency can be improved.

[0004] However, the above technical solution still has certain defects. When the angle of the workpiece needs to be adjusted during use, the existing technical means need to remove the workpiece from the tooling and then re-fix it, which requires the workpiece to be disassembled and assembled multiple times during processing, thereby wasting a lot of time in the processing process. For this reason, a machining center positioning tooling and a method of using the same that avoids repeated disassembly and assembly is proposed. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a machining center positioning tool that avoids repeated disassembly and assembly and a method of using the same, so as to solve the technical problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning tool for a machining center that avoids repeated disassembly and assembly, comprising a base, the base comprising a bottom plate, the top end of the bottom plate is fixedly connected to a sleeve shell, the inner wall of the sleeve shell is rotatably connected to a rotating seat, the bottom end of the rotating seat is fixedly connected to a limiting toothed disk located inside the sleeve shell, the inner wall of the sleeve shell is fixedly provided with a gear ring, and the gear ring is meshed with the outer wall of the gear disk.

[0007] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, a middle plate is fixedly connected to the top of the rotating seat, and the middle plate includes a fixed plate. A slide groove is provided on the top of the fixed plate, and a plurality of groups of sliding blocks are slidably connected to the inner wall of the slide groove, and a group of connecting columns are fixedly connected to the top of each group of sliding blocks.

[0008] As an optimal technical solution for a machining center positioning tooling that avoids repeated disassembly and assembly of the present invention, the inner wall of the fixed plate is slidably connected with an abutment frame, the top of the abutment frame abuts against the bottom ends of multiple groups of sliding blocks, and the bottom end of the abutment frame is fixedly connected with multiple groups of sleeve frames.

[0009] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, the inner wall of the fixed plate is rotatably connected to a plurality of sets of rotating shafts, the outer walls of the plurality of sets of rotating shafts are fixedly sleeved with deflection wheels, each set of the deflection wheels is respectively slidably sleeved on the inner wall of a set of sleeves, the ends of the plurality of sets of rotating shafts are respectively fixedly connected to a set of gears, the inner wall of the fixed plate is slidably connected to a rack, and the gears are meshed with the racks.

[0010] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, the side wall of the rack is fixedly connected to a push plate extending to the outside of the fixed shell, the side wall of the fixed plate is slidably connected to a limit pin, the limit pin abuts against the side wall of the push plate, the top end of the limit pin is fixedly connected to a return spring, and the top end of the return spring is fixedly connected to the inner wall of the fixed plate.

[0011] As an optimal technical solution for the positioning tooling of the machining center that avoids repeated disassembly and assembly of the present invention, a group of connecting mechanisms are fixedly arranged on the top of each group of connecting columns, and the connecting mechanism includes a sliding rod, the outer wall sliding sleeve of the sliding rod is provided with a sleeve, and the side wall of the sliding rod is threadedly connected with a fixing bolt extending to the outside of the sleeve.

[0012] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, the top end of the sleeve and the bottom end of the slide rod are respectively rotatably connected to a group of rotating blocks, and the inner walls of each group of the rotating blocks are respectively fixedly connected to a group of support columns, and the support columns located below are rotatably connected to the top ends of the connecting columns.

[0013] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, a sliding sleeve on the outer wall of the support column is provided with a sliding gear disc, and the top end of the sliding gear disc is fixedly connected to multiple groups of spring sheets, and the top end of the spring sheets is fixedly connected to the inner wall of the rotating block, and the bottom end of the sliding gear disc is engaged with a limiting gear ring, and the limiting gear ring is fixedly sleeved on the top end of the connecting column.

[0014] As an optimal technical solution for positioning tooling of a machining center that avoids repeated disassembly and assembly according to the present invention, the top end of the support column located above is fixedly connected to a sliding seat, the inner wall of the sliding seat is rotatably connected to a threaded rod, the outer wall of the threaded rod is threadedly connected to a stud, and the bottom end of the sliding seat is fixedly connected to another set of limiting gear rings.

[0015] As an optimal technical solution of the machining center positioning tooling to avoid repeated disassembly and assembly of the present invention, the method of use is as follows

[0016] 1. Overall direction adjustment:

[0017] By lifting the fixing plate upwards, the limiting toothed disc is separated from the gear ring, and then the fixing plate is rotated so that the workpiece can be rotated as a whole, and then the fixing plate is loosened so that the fixing plate falls, so that the limiting toothed disc is meshed with the gear ring, thereby limiting the angle of the workpiece;

[0018] 2. Connection mechanism adjustment:

[0019] By pushing the push rod, the deflection wheel drives the abutment frame to descend, so that the sliding block can slide freely inside the slide groove, so that the position of the connecting mechanism can be adjusted, so that the stud can be close to the fixed hole position of the workpiece;

[0020] 3. Precision adjustment:

[0021] The sleeve is pulled by rotating to slide on the outer wall of the slide rod, and the angle between the rotating block, the slide rod and the sleeve is flipped, and the fixed column and the connecting column are relatively rotated. Finally, the stud is pushed by the threaded rod, so that the position of the stud is finely adjusted, and finally the stud is aligned with the mounting hole on the workpiece.

[0022] In summary, the present invention mainly has the following beneficial effects:

[0023] 1. The present invention lifts the fixing plate upwards to separate the limiting toothed disc from the gear ring, then rotates the fixing plate so that the workpiece can rotate as a whole, then releases the fixing plate so that the fixing plate falls down, so that the limiting toothed disc meshes with the gear ring, thereby limiting the angle of the workpiece, so that during the processing of the workpiece, the workpiece can be more conveniently rotated as a whole according to the processing requirements, and there is no need to disassemble the workpiece;

[0024] 2. The present invention pushes the push rod so that the deflection wheel drives the abutment frame to descend, so that the sliding block can slide freely inside the slide groove, so that the position of the connection mechanism can be adjusted, so that the stud can be close to the fixed hole of the workpiece, so that before the workpiece is connected with the stud, the approximate position of the stud can be adjusted, so that the subsequent connection is more convenient;

[0025] 3. The present invention causes the sleeve to slide on the outer wall of the slide rod by rotating and pulling, and causes the angles between the rotating block, the slide rod and the sleeve to flip, and causes relative rotation between the fixed column and the connecting column, and finally pushes the stud by the threaded rod so that the position of the stud is finely adjusted, and finally the stud is aligned with the mounting hole on the workpiece, so that the entire device is more flexible in use, and a variety of workpieces with different hole positions can be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the side cross-section structure of the middle plate of the present invention;

[0029] Figure 4 This is a schematic structural diagram of the present invention in a state where the fixing plate is removed;

[0030] Figure 5 It is a schematic diagram of the exploded structure of part of the connecting mechanism of the present invention;

[0031] Figure 6 It is a schematic diagram of the main structure of the connecting mechanism of the present invention;

[0032] Figure 7 It is a schematic diagram of the cross-sectional structure of the casing of the present invention;

[0033] Figure 8 It is a schematic diagram of the internal structure of the casing of the present invention.

[0034] In the figure: 1. base; 2. middle plate; 3. connecting mechanism;

[0035] 101, bottom plate; 102, sleeve shell; 103, rotating seat; 104, limit toothed disc; 105, gear ring;

[0036] 201, fixed plate; 202, slide groove; 203, abutment frame; 204, sleeve frame; 205, rotating shaft; 206, deflection wheel; 207, gear; 208, rack; 209, push plate; 210, limit pin; 211, sliding block; 212, connecting column;

[0037] 301, rotating block; 302, supporting column; 303, sliding gear plate; 304, spring sheet; 305, limiting gear plate; 306, sliding rod; 307, sleeve; 308, fixing bolt; 309, sliding seat; 310, threaded rod; 311, stud. DETAILED DESCRIPTION

[0038] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0039] The following describes an embodiment of the present invention based on its overall structure.

[0040] A machining center positioning tool that avoids repeated disassembly and assembly and a method of using the same, such as Figures 1 to 8 As shown, the base 1 includes a bottom plate 101, the top of the bottom plate 101 is fixedly connected with a casing 102, the inner wall of the casing 102 is rotatably connected with a rotating seat 103, the bottom end of the rotating seat 103 is fixedly connected with a limiting toothed disk 104 located inside the casing 102, the inner wall of the casing 102 is fixedly sleeved with a gear ring 105, the gear ring 105 is meshed with the outer wall of the gear disk, the top of the rotating seat 103 is fixedly connected with a middle plate 2, the middle plate 2 includes a fixed plate 201, the top of the fixed plate 201 is provided with a slide groove 202, the inner wall of the slide groove 202 is slidably connected with multiple groups of sliding blocks 211, the top of each group of the sliding blocks 211 is respectively fixedly connected with a group of connecting columns 212, the inner wall of the fixed plate 201 is slidably connected with an abutting frame 203, the top of the abutting frame 203 abuts on the multiple groups of sliding blocks 21 1, the bottom end of the abutment frame 203 is fixedly connected to multiple sets of sleeve frames 204, the inner wall of the fixed plate 201 is rotatably connected to multiple sets of rotating shafts 205, the outer walls of the multiple sets of the rotating shafts 205 are fixedly sleeved with deflection wheels 206, each set of the deflection wheels 206 is respectively slidably sleeved on the inner wall of a set of sleeve shells 102, and the ends of the multiple sets of the rotating shafts 205 are respectively fixedly connected to a set of gears 207, the inner wall of the fixed plate 201 is slidably connected to a rack 208, the gear 207 is meshed with the rack 208, the side wall of the rack 208 is fixedly connected to a push plate 209 extending to the outside of the fixed shell, the side wall of the fixed plate 201 is slidably connected to a limit pin 210, the limit pin 210 abuts against the side wall of the push plate 209, the top of the limit pin 210 is fixedly connected to a return spring, and the top of the return spring is fixedly connected to the inner wall of the fixed plate 201.

[0041] By pushing the limit pin 210 to slide upward, the limit pin 210 no longer contacts the push plate 209, and then pushing the push plate 209, so that the push plate 209 drives the rack 208 to slide, and the rack 208 drives the gear 207 to rotate, thereby driving the multiple sets of rotating shafts 205 to rotate, and the rotation drives the deflection wheel 206 during the rotation process, so that the deflection wheel 206 pushes the sleeve frame 204 to slide on the inner wall of the fixed plate 201, so that the sleeve frame 204 drives the abutment frame 203 to slide, so that the top of the abutment frame 203 no longer abuts against the bottom end of the sliding block 211, and the sliding block 211 can slide inside the sliding groove 202 at this time, so that the connecting mechanism 3 can drive the sliding block 211 to slide inside the sliding groove 202 through the connecting column 212, thereby adjusting the approximate position of the stud 311, and then the push plate 209 is rotated in the opposite direction to reset the push plate 209. During the resetting process of plate 209, rack 208 is driven to slide in the opposite direction, thereby driving gear 207 to rotate in the opposite direction, gear 207 drives rotating shaft 205 to rotate in the opposite direction, rotating shaft 205 drives deflection wheel 206 to rotate in the opposite direction, thereby pushing sleeve frame 204 to slide upward, sleeve frame 204 pushes abutting frame 203 to slide upward, so that the top end of abutting frame 203 presses multiple sets of sliding blocks 211 on the top end of the inner wall of sliding groove 202, so that sliding block 211 cannot slide. After the workpiece is fixed, if the workpiece needs to be rotated, at this time, by lifting up the fixing plate 201, the limiting toothed disc 104 and the gear ring 105 are separated, and then the fixing plate 201 is rotated, so that the workpiece can rotate as a whole, and then the fixing plate 201 is released, so that the fixing plate 201 falls, so that the limiting toothed disc 104 and the gear ring 105 are meshed, thereby limiting the angle of the workpiece.

[0042] Please refer to Figure 5 , Figure 6 and Figure 7A group of connecting mechanisms 3 are fixedly arranged at the top of each group of connecting columns 212, and the connecting mechanisms 3 include a sliding rod 306, and the outer wall of the sliding rod 306 is slidably sleeved with a sleeve 307, and the side wall of the sliding rod 306 is threadedly connected with a fixing bolt 308 extending to the outside of the sleeve 307, and the top of the sleeve 307 and the bottom of the sliding rod 306 are rotatably connected with a group of rotating blocks 301, and the inner wall of each group of the rotating blocks 301 is fixedly connected with a group of supporting columns 302, and the supporting columns 302 located at the bottom are rotatably connected to the top of the connecting column 212, and the outer wall of the supporting columns 302 is slidably sleeved with a fixing bolt 308 extending to the outside of the sleeve 307. There is a sliding toothed disc 303, the top of which is fixedly connected to a plurality of groups of spring sheets 304, the top of which is fixedly connected to the inner wall of the rotating block 301, the bottom end of the sliding toothed disc 303 is engaged with a limiting toothed ring 305, the limiting toothed ring 305 is fixedly sleeved on the top of the connecting column 212, the top of the supporting column 302 located above is fixedly connected to a sliding seat 309, the inner wall of the sliding seat 309 is rotatably connected to a threaded rod 310, the outer wall of the threaded rod 310 is threadedly connected to a stud 311, and the bottom end of the sliding seat 309 is fixedly connected to another group of limiting toothed rings 305.

[0043] By rotating the fixing bolt 308, the sliding rod 306 can slide inside the sleeve 307, thereby pulling the sleeve 307, so that the distance between the two sets of rotating blocks 301 is increased, and then by pushing the angle between the rotating block 301 and the sleeve 307, the angle of the stud 311 is changed, and the bolt can be pushed to slide on the inner wall of the sliding seat 309 by rotating the threaded rod 310, so that the position of the stud 311 is finely adjusted, and the rotating block 301 can be rotated at the top of the connecting column 212, but in the process of horizontal rotation of the rotating block 301, the rotating block 301 drives the support column 302, so that the support column 302 drives the sliding gear disk 303 to rotate, so that the sliding gear disk 303 is blocked by the limiting tooth ring 305, thereby compressing the spring sheet 304, so that the resilience of the spring sheet 304 needs to be overcome when the rotating block 301 is pushed horizontally to rotate.

[0044] When using, the usage is as follows

[0045] 1. Overall direction adjustment:

[0046] By lifting the fixing plate 201 upward, the limiting toothed disc 104 is separated from the gear ring 105, and then the fixing plate 201 is rotated so that the workpiece can be rotated as a whole, and then the fixing plate 201 is loosened so that the fixing plate 201 falls, so that the limiting toothed disc 104 is meshed with the gear ring 105, so as to limit the angle of the workpiece;

[0047] 2. Adjustment of connecting mechanism 3:

[0048] By pushing the push rod, the deflection wheel 206 drives the abutment frame 203 to descend, so that the sliding block 211 can slide freely inside the slide groove 202, so that the position of the connecting mechanism 3 can be adjusted, so that the stud 311 can be close to the fixed hole position of the workpiece;

[0049] 3. Precision adjustment:

[0050] By rotating and pulling the sleeve 307 to slide on the outer wall of the sliding rod 306, the angle between the rotating block 301, the sliding rod 306 and the sleeve 307 is flipped, and the fixed column and the connecting column 212 are relatively rotated, and finally the stud 311 is pushed by the threaded rod 310 so that the position of the stud 311 is finely adjusted, and finally the stud 311 is aligned with the mounting hole on the workpiece. The parts not involved in the device are the same as the prior art or can be implemented by the prior art.

[0051] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A positioning tool for a machining center that avoids repeated disassembly and assembly, comprising a base (1), characterized in that: The base (1) comprises a bottom plate (101), the top end of the bottom plate (101) is fixedly connected to a casing (102), the inner wall of the casing (102) is rotatably connected to a rotating seat (103), the bottom end of the rotating seat (103) is fixedly connected to a limiting toothed disc (104) located inside the casing (102), the inner wall of the casing (102) is fixedly sleeved with a toothed ring (105), and the toothed ring (105) is meshed with the outer wall of the toothed disc.

2. A machining center positioning tool for avoiding repeated disassembly and assembly according to claim 1, characterized in that: The top of the rotating seat (103) is fixedly connected to a middle plate (2), and the middle plate (2) includes a fixed plate (201). The top of the fixed plate (201) is provided with a slide groove (202), and the inner wall of the slide groove (202) is slidably connected to multiple groups of sliding blocks (211), and the top of each group of sliding blocks (211) is fixedly connected to a group of connecting columns (212).

3. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 2, characterized in that: The inner wall of the fixed plate (201) is slidably connected to an abutment frame (203), the top end of the abutment frame (203) abuts against the bottom ends of multiple sets of sliding blocks (211), and the bottom end of the abutment frame (203) is fixedly connected to multiple sets of sleeve frames (204).

4. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 2, characterized in that: The inner wall of the fixed plate (201) is rotatably connected to a plurality of rotating shafts (205); the outer walls of the plurality of rotating shafts (205) are fixedly sleeved with deflection wheels (206); each group of deflection wheels (206) is slidably sleeved on the inner wall of a group of sleeve shells (102); the ends of the plurality of rotating shafts (205) are fixedly connected to a group of gears (207); the inner wall of the fixed plate (201) is slidably connected to a rack (208); the gear (207) is meshed with the rack (208).

5. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 4, characterized in that: The side wall of the rack (208) is fixedly connected to a push plate (209) extending to the outside of the fixed shell, and the side wall of the fixed plate (201) is slidably connected to a limit pin (210), and the limit pin (210) abuts against the side wall of the push plate (209). The top end of the limit pin (210) is fixedly connected to a return spring, and the top end of the return spring is fixedly connected to the inner wall of the fixed plate (201).

6. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 2, characterized in that: A group of connecting mechanisms (3) is fixedly arranged at the top of each group of connecting columns (212), and the connecting mechanisms (3) include a sliding rod (306), the outer wall of the sliding rod (306) is slidably sleeved with a sleeve (307), and the side wall of the sliding rod (306) is threadedly connected with a fixing bolt (308) extending to the outside of the sleeve (307).

7. A machining center positioning tool for avoiding repeated disassembly and assembly according to claim 6, characterized in that: The top end of the sleeve (307) and the bottom end of the slide rod (306) are rotatably connected to a group of rotating blocks (301), and the inner wall of each group of rotating blocks (301) is fixedly connected to a group of supporting columns (302), and the supporting columns (302) located at the bottom are rotatably connected to the top end of the connecting column (212).

8. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 7, characterized in that: The outer wall of the support column (302) is slidably sleeved with a sliding toothed disc (303), the top of the sliding toothed disc (303) is fixedly connected to a plurality of sets of spring sheets (304), the top of the spring sheets (304) is fixedly connected to the inner wall of the rotating block (301), the bottom end of the sliding toothed disc (303) is meshed with a limiting toothed ring (305), and the limiting toothed ring (305) is fixedly sleeved on the top of the connecting column (212).

9. The positioning tool for a machining center that avoids repeated disassembly and assembly according to claim 7, characterized in that: The top end of the support column (302) located above is fixedly connected to a sliding seat (309), the inner wall of the sliding seat (309) is rotatably connected to a threaded rod (310), the outer wall of the threaded rod (310) is threadedly connected to a stud (311), and the bottom end of the sliding seat (309) is fixedly connected to another set of limiting toothed rings (305).

10. A method for using a machining center positioning tool that avoids repeated disassembly and assembly according to any one of claims 1 to 9, characterized in that: How to use it:

1. Overall direction adjustment: The fixing plate (201) is lifted upwards to separate the limiting toothed disc (104) from the gear ring (105), and then the fixing plate (201) is rotated so that the workpiece can be rotated as a whole, and then the fixing plate (201) is loosened so that the fixing plate (201) falls, so that the limiting toothed disc (104) and the gear ring (105) are meshed, thereby limiting the angle of the workpiece; 2. Connection mechanism (3) adjustment: By pushing the push rod, the deflection wheel (206) drives the abutment frame (203) to descend, so that the sliding block (211) can slide freely inside the slide groove (202), so that the position of the connecting mechanism (3) can be adjusted, so that the stud (311) can be close to the fixed hole position of the workpiece; 3. Precision adjustment: By rotating and pulling the sleeve (307) to slide on the outer wall of the slide rod (306), the angle between the rotating block (301), the slide rod (306) and the sleeve (307) is reversed, and the fixed column and the connecting column (212) are relatively rotated. Finally, the stud (311) is pushed by the threaded rod (310) so that the position of the stud (311) is finely adjusted, and finally the stud (311) is aligned with the mounting hole on the workpiece.

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