Positioning mechanism for assembling air cylinder

Abstract

The invention relates to the technical field of air cylinder assembling, in particular to a positioning mechanism for air cylinder assembling, which comprises a mounting table, a mounting groove is formed in the top surface of the mounting table, a first sliding groove and a second sliding groove are formed in the top surface of the mounting table, a moving seat is slidably connected in the first sliding groove, and a third sliding groove is formed in the top surface of the moving seat; and the clamping unit is used for fixing the cylinder body, and the clamping unit comprises two clamping blocks. According to the assembling device, the base and the top base are fixed through the first positioning base and the second positioning base correspondingly, the clamping unit is used for fixing the cylinder body, the assembling unit is used for fixing bolts, and the assembling precision is improved. Through cooperative arrangement of the rotating column, the hexagonal column, the large gear and the small gears, after the assembling unit fixes the four bolts and enables the four bolts to sequentially penetrate through the top seat and the base, the second motor is started to drive the large gear to rotate, the large gear and the four small gears are in meshing transmission, the hexagonal column drives the bolts to rotate, and therefore rapid assembling is achieved, and the assembling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylinder assembly, in particular to a positioning mechanism for cylinder assembly. BACKGROUND

[0002] The cylinder refers to a cylindrical metal machine part that guides the piston to perform linear reciprocating motion in the cylinder. Air is converted into mechanical energy by expansion in the engine cylinder, and gas is compressed by the piston to increase pressure in the compressor cylinder. In the traditional cylinder assembly process, the base and the top seat are sequentially sleeved on both ends of the cylinder body, and then four bolts are used for fixation. In the production and manufacturing process of the cylinder, the assembly link is a crucial step, and the assembly quality directly affects the performance, stability and service life of the cylinder. At present, the assembly method of the cylinder is still mainly manual operation. During assembly, the operator needs to accurately sleeve the base and the top seat on both ends of the cylinder body in sequence. After the sleeve of the base and the top seat with the cylinder body is completed, four bolts need to be sequentially inserted through the corresponding holes in the base and the top seat and tightened. When manually inserting the bolts, due to the small size and high position accuracy of the holes in the base and the top seat, the operator needs to spend a lot of time to align the hole positions. Especially when continuously assembling multiple cylinders, visual fatigue is easy to occur, which leads to difficulty in bolt insertion, and even the bolts are inserted into the wrong holes or the threads are damaged. SUMMARY

[0003] The purpose of the present application is to provide a positioning mechanism for cylinder assembly to solve the problems raised in the background.

[0004] To achieve the above purpose, the present application provides the following technical scheme: A positioning mechanism for cylinder assembly, comprising: A mounting table, a mounting groove is formed in the top surface of the mounting table, a sliding groove one and a sliding groove two are formed in the top surface of the mounting table, a moving seat is slidably connected in the sliding groove one, and a sliding groove three is formed in the top surface of the moving seat; A clamping unit for fixing the cylinder body, the clamping unit comprises two clamping blocks, a moving block is fixedly connected to the bottom surface of each clamping block, and the moving blocks are slidably connected with the mounting groove; A positioning seat one, a placing groove one is formed in the side wall of the positioning seat one facing the clamping unit, for placing the base, four butt joints are symmetrically arranged in the inside of the placing groove one, a sliding block one is fixedly connected to the bottom surface of the positioning seat one, and the sliding block one is slidably connected with the sliding groove two; A positioning seat two, fixedly connected to the top surface of the moving seat, a placing groove two is formed in the side wall of the positioning seat two facing the clamping unit, for placing the top seat, a large circular hole and four symmetrically arranged insertion holes one are formed in the inside of the placing groove two; The assembly unit includes a housing. A slider two, which is slidably connected to a slide groove three, is fixedly connected to the bottom surface of the housing. Four rotating columns are symmetrically rotatably connected inside the housing. Each of the four rotating columns has a hexagonal column fixedly connected to its end, corresponding to four bolts. An electromagnet is installed inside each of the four hexagonal columns. A small gear is sleeved and fixed to the outer wall of each of the four rotating columns. A large gear, driven by a motor two, is installed inside the housing. The large gear meshes with the four small gears for transmission.

[0005] Furthermore, the top surface of the mounting platform is fixedly connected to lifting platforms on both sides of the clamping unit.

[0006] Furthermore, the two clamping blocks have arc-shaped notches on their opposite sidewalls, and the surfaces of the two clamping blocks have moving grooves at the positions corresponding to the four bolts.

[0007] Furthermore, the mounting slot of the mounting platform is rotatably connected to a bidirectional lead screw, and a motor is fixedly connected to the outer wall of the mounting platform. The motor shaft of the motor is driven by the bidirectional lead screw, and both moving blocks are screwed into the outer wall of the bidirectional lead screw.

[0008] Furthermore, all four docking posts are slidably inserted into the interior of the positioning seat, and each of the four docking posts located inside the positioning seat is fixedly connected to a spring.

[0009] Furthermore, the assembly unit also includes a rectangular plate, the surface of which is provided with insertion holes 2 at positions corresponding to the four rotating columns, and two connecting rods are fixedly connected to the two opposite sidewalls of the rectangular plate. The two opposite sidewalls of the two connecting rods are provided with strip grooves, and two springs are fixedly connected in the two strip grooves.

[0010] Furthermore, the two opposite sidewalls of the housing are fixedly connected with connecting blocks, the two connecting blocks are slidably connected to the strip grooves of the two connecting rods respectively, and the two connecting blocks are respectively connected to the other end of the two springs.

[0011] Furthermore, the rectangular plate has two horizontally oriented grooves on its side wall facing the second positioning seat, which are used to guide the bolts to connect with the hexagonal column.

[0012] Furthermore, the inner sidewalls of both the placement slot one of the positioning seat one and the placement slot two of the positioning seat two are provided with grooves, and each groove is provided with a fixing unit. The fixing unit includes two clamping plates, which are respectively set in the two grooves on the sidewalls of the placement slot one or the placement slot two. Spring three is fixedly connected to the opposite sidewalls of the two clamping plates, and two round rods are fixedly connected to the opposite sidewalls of the two clamping plates. The round rods extend to the outside of the positioning seat one or the positioning seat two, and a connecting plate is fixedly connected between the ends of the two round rods.

[0013] Furthermore, threaded posts are provided through the side walls of both connecting plates, pressure plates are fixedly connected to the ends of the two threaded posts near the clamping plates, and knobs are fixedly connected to the other ends of the two threaded posts.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The base and top are fixed by setting positioning seat one and positioning seat two respectively, the clamping unit fixes the cylinder body, and the assembly unit fixes the bolts, ensuring the accurate position of each component and improving the assembly accuracy.

[0015] By using the coordinated arrangement of the rotating column, hexagonal column, large gear, and small gear, the assembly unit fixes four bolts and passes them through the top and bottom seats in sequence. Then, the motor is started to drive the large gear to rotate, which in turn meshes with the four small gears, causing the hexagonal column to drive the bolts to rotate, thereby achieving rapid assembly and improving assembly efficiency. Attached Figure Description

[0016] Figures 1-2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the clamping unit structure in this invention; Figure 4 This is a schematic diagram of the movable seat, positioning seat II, and assembly unit structure in this invention; Figure 5 This is a schematic diagram of the internal structure of the shell in this invention; Figure 6 This is a schematic diagram of the rectangular plate structure in this invention; Figure 7 This is a schematic diagram of the positioning seat structure in this invention; Figure 8 This is a schematic diagram of the fixed unit structure in this invention.

[0017] In the diagram: 100, mounting platform; 110, mounting groove; 120, double-acting lead screw; 130, motor one; 140, lifting platform; 150, slide rail one; 160, slide rail two; 170, moving seat; 171, slide rail three; 200, clamping unit; 210, clamping block; 211, arc-shaped notch; 212, moving groove; 220, moving block; 300, positioning seat one; 310, placement groove one; 320, docking post; 321, spring one; 330, slider one; 400, positioning seat two; 410, placement groove two; 411, large circle Hole; 412, Insertion Hole 1; 500, Assembly Unit; 510, Housing; 511, Slider 2; 512, Connecting Block; 520, Rotating Column; 521, Hexagonal Column; 530, Large Gear; 540, Small Gear; 550, Rectangular Plate; 551, Insertion Hole 2; 552, Connecting Rod; 553, Spring 2; 554, Positioning Slot; 560, Motor 2; 600, Fixing Unit; 610, Clamping Plate; 620, Round Rod; 630, Connecting Plate; 640, Spring 3; 650, Threaded Column; 660, Pressure Plate; 670, Knob. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example Please see Figures 1-8In this embodiment of the invention, a positioning mechanism for cylinder assembly includes a mounting platform 100, a clamping unit 200, a first positioning seat 300, a second positioning seat 400, and an assembly unit 500. The top surface of the mounting platform 100 has a mounting groove 110, and the top surface of the mounting platform 100 has a first sliding groove 150 and a second sliding groove 160, which are located on the left and right sides of the mounting groove 110, respectively. A movable seat 170 is slidably connected inside the first sliding groove 150, and the top surface of the movable seat 170 has a third sliding groove 171. The clamping unit 200 is used to fix the cylinder body and includes... Two clamping blocks 210 are provided, and each clamping block 210 has a movable block 220 fixedly connected to its bottom surface. Both movable blocks 220 are slidably connected to the mounting groove 110. A positioning seat 300 has a placement groove 310 on its side wall facing the clamping unit 200 for placing the base. Four docking posts 320 are symmetrically arranged inside the placement groove 310, and the positions of the four docking posts 320 correspond to the positions of the four bolt holes on the base. A slider 330 is fixedly connected to the bottom surface of the positioning seat 300, and the slider 330 is slidably connected to the sliding groove 160. The positioning seat 400 is fixedly connected to the movable seat 17. On the top surface of the 0, the positioning seat 2 400 facing the side wall of the clamping unit 200 has a placement groove 2 410 for placing the top seat. The placement groove 2 410 has a large circular hole 411 and four symmetrical insertion holes 1 412. The large circular hole 411 is used for docking with the boss at the center of the top seat. The positions of the four insertion holes 1 412 correspond to the positions of the four bolt holes of the top seat. The assembly unit 500 includes a housing 510. The bottom surface of the housing 510 is fixedly connected to a slider 2 511 that is slidably connected to the slide groove 3 171. The inside of the housing 510 is symmetrically rotatably connected to four rotating columns 520. The positions of the four rotating columns 520 correspond to the positions of the four bolt holes on the top seat and the base, respectively. Each of the four rotating columns 520 has a hexagonal column 521 fixedly connected to its end, corresponding to one of the four bolts. The four hexagonal columns 521 are inserted into the internal hexagonal holes at the top of the four bolts. Each of the four hexagonal columns 521 contains an electromagnet. A small gear 540 is fixedly fitted onto the outer wall of each of the four rotating columns 520. A large gear 530, driven by a motor 560, is located inside the housing 510. The motor 560 is fixed to the outer wall of the housing 510, and the large gear 530 meshes with the four small gears 540 for transmission. The positioning seat 300 has four sliding slots inside, and the four mating columns 320 are slidably inserted into these slots. Springs 321 are fixedly connected to the ends of the four mating columns 320 located inside the sliding slots of the positioning seat 300.

[0020] Specifically, in use, the cylinder body to be assembled is placed on the mounting platform 100, and then the two clamping blocks 210 are slid to clamp the cylinder body from both sides, firmly fixing the cylinder body on the mounting platform 100. The base is placed in the placement slot 310 of the positioning seat 300. During placement, the four bolt holes on the base are aligned with the four mating posts 320. The mating posts 320 are inserted into the bolt holes under the action of the spring 321, achieving precise positioning of the base. The top seat is then placed in the placement slot 400 of the positioning seat 400. Place the top seat into groove 410 so that the boss at the center of the top seat is inserted into the large round hole 411. At the same time, align the four bolt holes on the top seat with the four insertion holes 412 to complete the initial positioning of the top seat. Insert the tops of the four bolts into the four hexagonal posts 521 respectively, so that the four hexagonal posts 521 are inserted into the internal hexagonal holes at the tops of the four bolts. At this time, the electromagnet is energized to attract the bolts and prevent them from falling off. Move the positioning seat 300 so that it slides along the slide groove 160 towards the cylinder body until the base is fitted onto the cylinder body. At the bottom, the movable seat 170 is moved, causing the positioning seat 400 to slide towards the cylinder body until the top seat is fitted onto the top of the cylinder body. Then, the assembly unit 500 slides along the slide groove 171, causing the assembly unit 500 to drive four bolts to be inserted sequentially through the bolt holes on the top seat and the base. The motor 560 is started, and the motor drives the large gear 530 to rotate through the motor shaft. The large gear 530 meshes with the four small gears 540, causing the four rotating columns 520 to rotate simultaneously, thereby... The four rotating columns 520 drive the four bolts to rotate simultaneously, so that the ends of the bolts engage with the bolt holes on the top seat and the base, completing the bolt installation. When the bolts are screwed into the bolt holes of the base, they will squeeze the docking column 320, causing the docking column 320 to retract into the positioning seat 300 and not occupy the bolt holes of the base. After the bolt assembly is completed, turn off the electromagnet, disconnect the power, move the moving seat 170 and the positioning seat 300 to the initial position, and release the clamping unit 200 to remove the assembled cylinder.

[0021] like Figures 2-3 As shown, in this embodiment, the top surface of the mounting platform 100 is fixedly connected to both sides of the clamping unit 200, and the top surface of the lifting platform 140 is arc-shaped. The two clamping blocks 210 are provided with arc-shaped notches 211 on their opposite sidewalls. The surfaces of the two clamping blocks 210 are provided with moving grooves 212 at the positions corresponding to the four bolts. The mounting groove 110 of the mounting platform 100 is rotatably connected to a bidirectional lead screw 120. The outer wall of the mounting platform 100 is fixedly connected to a motor 130. The motor shaft of the motor 130 is driven by the bidirectional lead screw 120. The surfaces of the two moving blocks 220 are provided with threaded holes. The two moving blocks 220 are screwed into the outer wall of the bidirectional lead screw 120.

[0022] In this embodiment, during installation, the cylinder body is placed on two lifting platforms 140, which lift the cylinder body. The motor 130 is started, causing the bidirectional lead screw 120 to rotate. Since the threads at both ends of the bidirectional lead screw 120 are opposite, the two clamping units 200 can move towards each other along the bidirectional lead screw 120, thereby driving the two clamping blocks 210 to move closer together and clamp the cylinder body. The arc-shaped notch 211 on the clamping block 210 fits against the outer arc surface of the cylinder body, and the arc-shaped notch 211 is provided with an anti-slip pad to increase the friction between it and the cylinder body. The surfaces of the two clamping blocks 210 are provided with moving grooves 212 at the positions corresponding to the four bolts. During the bolt installation process, the moving grooves 212 can provide sufficient space for the bolts, and after the bolt installation is completed, the two clamping blocks 210 can also be separated smoothly to avoid the clamping blocks 210 interfering with the bolt installation.

[0023] like Figure 4 and Figure 6 As shown, in this embodiment, the assembly unit 500 further includes a rectangular plate 550. Insertion holes 551 are provided through the surface of the rectangular plate 550 at positions corresponding to the four rotating columns 520. Connecting rods 552 are fixedly connected to two opposite sidewalls of the rectangular plate 550. Strip grooves are provided on the opposite sidewalls of the two connecting rods 552, and springs 553 are fixedly connected within each of the two strip grooves. Connecting blocks 512 are fixedly connected to two opposite sidewalls of the housing 510. The two connecting blocks 512 are slidably connected to the strip grooves of the two connecting rods 552, and are connected to the other ends of the two springs 553. Two positioning grooves 554 are laterally provided on the sidewall of the rectangular plate 550 facing the positioning seat 400. The positions of the positioning grooves 554 correspond to the positions of the insertion holes 551, and are used to guide the bolts to engage with the hexagonal columns 521.

[0024] In practice, the rectangular plate 550 is positioned at the front end of the hexagonal post 521. When preparing to assemble the bolts, the end of the bolt can be slid along the insertion hole 551, allowing the hexagonal hole area inside the bolt to smoothly pass through the insertion hole 551 and be inserted into the corresponding hexagonal post 521. At the same time, the insertion hole 551 also serves to assist in supporting the bolt. As the housing 510 moves towards the positioning seat 400 and the bolt is inserted into the top seat and base, the surface of the rectangular plate 550 first comes into contact with the outer wall of the positioning seat 400. As the housing 510 continues to move, the rectangular plate 550 is compressed, causing the spring 553 to contract. The connecting block 512 slides along the groove of the connecting rod 552 until the rectangular plate 550 is also completely in contact with the outer wall of the housing 510. Then, the motor 560 can be started to assemble the bolts. After assembly, as the housing 510 is removed, the rectangular plate 550 will return to its original position under the force of the spring 553, preparing for the next assembly.

[0025] likeFigure 4 and Figures 7-8 As shown, in this embodiment, the inner sidewalls of the placement slot 310 of the positioning seat 300 and the placement slot 410 of the positioning seat 400 are both provided with grooves. Each groove contains a fixing unit 600, which includes two clamping plates 610. The two clamping plates 610 are respectively disposed in two grooves on the sidewalls of the placement slot 310 or the placement slot 410. Springs 640 are fixedly connected to the opposite sidewalls of the two clamping plates 610. Two round rods 620 are fixedly connected to the opposite sidewalls of the two clamping plates 610. The round rods 620 extend to the outside of the positioning seat 300 or the positioning seat 400. A connecting plate 630 is fixedly connected between the ends of the two round rods 620. Threaded posts 650 are provided through the sidewalls of the two connecting plates 630. Pressure plates 660 are fixedly connected to the ends of the two threaded posts 650 near the clamping plates 610. A knob 670 is fixedly connected to the other end of each threaded post 650.

[0026] In specific implementation, (the grooves in positioning seat 1 300 and positioning seat 2 400 are positioned in the same location; the following structural description focuses on positioning seat 1 300) the inner walls of the placement slot 1 310 of positioning seat 1 300 are provided with grooves at intervals and opposite sides. Two clamping plates 610 are respectively placed in the two grooves, and spring 3 640 is placed between the clamping plates 610 and the inner walls of the grooves. Under the elastic force of spring 3 640, the two clamping plates 610 will extend towards each other. When installing the base, first pull the two connecting plates 630 outwards so that the two The clamping plates 610 retract into the groove. When the base is inserted into the placement groove 310, the two clamping plates 610 will be pressed tightly against the two outer walls of the base under the action of the spring 640, thereby clamping the base. In order to prevent the base from falling off due to the instability of the spring 640 during the assembly process, the two knobs 670 can be rotated so that the two threaded pins 650 drive the two pressure plates 660 to move closer to the two clamping plates 610 until the pressure plates 660 are pressed tightly against the clamping plates 610, thereby restricting the movement of the clamping plates 610 and ensuring the fixation of the base.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning mechanism for assembling a cylinder, characterized by comprising: The application relates to a cylinder body assembling device. The installation table (100) is provided with an installation groove (110) on the top surface, a sliding groove I (150) and a sliding groove II (160) are formed on the top surface of the installation table (100), a moving seat (170) is slidably connected in the sliding groove I (150), and a sliding groove III (171) is formed on the top surface of the moving seat (170). The clamping unit (200) is used for fixing the cylinder body and comprises two clamping blocks (210), the bottom surfaces of the two clamping blocks (210) are fixedly connected with moving blocks (220), and the two moving blocks (220) are slidably connected with the installation groove (110). The positioning seat I (300) is provided with a placing groove I (310) on the side wall facing the clamping unit (200) and is used for placing a base, four butt-joint columns (320) are symmetrically arranged in the placing groove I (310), a sliding block I (330) is fixedly connected to the bottom surface of the positioning seat I (300), and the sliding block I (330) is slidably connected with the sliding groove II (160). The positioning seat II (400) is fixedly connected to the top surface of the moving seat (170), the positioning seat II (400) is provided with a placing groove II (410) on the side wall facing the clamping unit (200) and is used for placing a top base, a large circular hole (411) and four symmetrically-arranged insertion holes I (412) are formed in the placing groove II (410). The assembling unit (500) comprises a shell (510), the bottom surface of the shell (510) is fixedly connected with a sliding block II (511) slidably connected with the sliding groove III (171), four rotating columns (520) are symmetrically arranged in the shell (510) and are rotatably connected, the end portions of the four rotating columns (520) are fixedly connected with hexagonal columns (521) corresponding to four bolts, electromagnets are arranged in the four hexagonal columns (521), small gear wheels (540) are fixedly sleeved on the outer walls of the four rotating columns (520), a large gear wheel (530) is arranged in the shell (510) and is driven by a motor II (560), and the large gear wheel (530) is in meshing transmission with the four small gear wheels (540).

2. The cylinder assembly positioning mechanism according to claim 1, characterized by The top surface of the installation table (100) is fixedly connected with lifting tables (140) on the two sides of the clamping unit (200).

3. The cylinder assembly positioning mechanism of claim 1, wherein Arc-shaped notches (211) are arranged on the opposite side walls of the two clamping blocks (210), and moving grooves (212) are formed on the surfaces of the two clamping blocks (210) and correspond to the four bolts.

4. The positioning mechanism for cylinder assembly according to claim 1 or 2, characterized by A bidirectional screw rod (120) is rotatably connected in the installation groove (110) of the installation table (100), a motor I (130) is fixedly connected to the outer side wall of the installation table (100), the motor shaft of the motor I (130) drives the bidirectional screw rod (120), and the two moving blocks (220) are in screw connection with the outer wall of the bidirectional screw rod (120).

5. The cylinder assembly positioning mechanism of claim 1, wherein Four said butt joint column (320) are inserted with the inside of positioning seat one (300), the end of four said butt joint column (320) in the inside of positioning seat one (300) is fixedly connected with spring one (321).

6. The cylinder assembly positioning mechanism of claim 1, wherein The assembling unit (500) further includes a rectangular plate (550), a plurality of insertion holes (551) are formed through the corresponding positions of the four rotating columns (520) on the surface of the rectangular plate (550), two opposite side walls of the rectangular plate (550) are fixedly connected with connecting rods (552), a plurality of strip-shaped grooves are formed on the opposite side walls of the two connecting rods (552), and a plurality of spring (553) are fixedly connected in the two strip-shaped grooves.

7. The cylinder assembly positioning mechanism of claim 1, wherein The opposite side walls of the shell (510) are fixedly connected with connecting blocks (512), the strip-shaped grooves of the two connecting rods (552) are slidably connected with the two connecting blocks (512), and the other ends of the two spring (553) are connected with the two connecting blocks (512).

8. The cylinder assembly positioning mechanism of claim 6, wherein The side wall of the rectangular plate (550) facing the positioning seat two (400) is transversely provided with two positioning grooves (554) for guiding the butt joint of the bolts and the hexagonal column (521).

9. The cylinder assembly positioning mechanism of claim 1, wherein The inner side walls of the placing groove one (310) of the positioning seat one (300) and the placing groove two (410) of the positioning seat two (400) are provided with grooves, and the grooves are provided with fixing units (600). The fixing unit (600) includes two clamping plates (610), the two clamping plates (610) are arranged in the two grooves on the side walls of the placing groove one (310) or the placing groove two (410), the opposite side walls of the two clamping plates (610) are fixedly connected with spring (640), the opposite side walls of the two clamping plates (610) are fixedly connected with two circular rods (620), the circular rods (620) extend to the outside of the positioning seat one (300) or the positioning seat two (400), and the ends of the two circular rods (620) are fixedly connected with a connecting plate (630).

10. The cylinder assembly positioning mechanism of claim 9, wherein The side walls of the two connecting plates (630) are provided with threaded columns (650), the ends of the two threaded columns (650) close to the clamping plates (610) are fixedly connected with pressing plates (660), and the other ends of the two threaded columns (650) are fixedly connected with knobs (670).

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