Clamp for cutting aluminum inner pipe

Abstract

The invention relates to the technical field of clamp structures, and discloses a clamp for cutting an aluminum inner pipe. The direction mechanism is installed on the top of the base and used for adjusting the overall direction of the clamp, the direction mechanism comprises a direction box, a driving motor and a bearing flange are installed on the two sides of the direction box respectively, and a worm is installed between the driving motor and the bearing flange; and the adjusting mechanism is installed at the top of the direction mechanism and used for further adjusting the clamp, and the adjusting mechanism comprises a lifting assembly, a rotating assembly and a clamping assembly. The direction mechanism is introduced, the driving motor is used for driving the worm to rotate, then the worm wheel and the driving shaft are driven to rotate, flexible adjustment of the overall direction of the clamp is achieved, the single limitation of a traditional cutting clamp in the horizontal direction is solved, and the clamp can conduct multi-angle accurate positioning according to different cutting requirements; and the flexibility and adaptability of cutting operation are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of fixture structures, in particular to a fixture used for cutting aluminum inner tubes. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool, which is an automated machine tool equipped with a program control system. The control system can logically process programs specified by control codes or other symbolic instructions, decode them, express them in coded numbers, and input them into the CNC device through information carriers. After calculation and processing, the CNC device sends various control signals to control the action of the machine tool, and automatically processes the parts according to the shape and size required by the drawing. When the CNC machine tool processes the aluminum inner tube, it needs to use a clamp to fix and clamp the aluminum inner tube.

[0003] After searching, the Chinese patent number CN218964738U discloses a clamp for aluminum inner tubes, which relates to the field of clamp technology, including a bottom plate, a plurality of positioning columns are symmetrically fixedly connected at the top center of the bottom plate, a first adjusting bolt is rotatably connected to the top of the bottom plate, a sliding groove is provided at the top of the bottom plate, a driving motor is fixedly installed on the outer surface of one side of the bottom plate, and the output end of the driving motor slides through the outer surface of the bottom plate and extends into the sliding groove. The utility model positions the aluminum inner tube workpiece through a flexible positioning component, and then cooperates with a fixed clamping component to fix and clamp its middle part, and then releases the flexible positioning component, thereby improving production efficiency.

[0004] The above-mentioned clamp structure realizes the cutting of the aluminum tube by means of the positioning components approached in the horizontal direction. However, in actual use, the sizes of the aluminum tubes vary, and the cutting positions also vary, that is, cutting methods at different angles will occur. In the traditional cutting method, the position of the machine tool used for cutting does not change. Therefore, the above-mentioned clamp only clamps the aluminum tube in the horizontal direction, which is limited by the problem of too few degrees of freedom and cannot meet the needs of multi-angle cutting, thereby limiting the scope of use of the clamp. Based on this, the present invention designs a clamp for cutting aluminum inner tubes to solve the above-mentioned problem. Summary of the invention

[0005] The purpose of the present invention is to provide a clamp for cutting aluminum inner tubes, which solves the problem in the background technology that the degree of freedom is small and the need for multi-angle cutting cannot be met.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A fixture for cutting an aluminum inner tube, comprising:

[0008] A supporting mechanism, the supporting mechanism comprising a base, a fixing plate is installed at the bottom of the base, and a fixing hole is opened in the inner cavity of the fixing plate for fixing the entire clamp;

[0009] A direction mechanism, which is installed on the top of the base and is used to adjust the overall direction of the fixture. The direction mechanism includes a direction box, a drive motor and a bearing flange are installed on both sides of the direction box, a worm is installed between the drive motor and the bearing flange, the output shaft of the drive motor and the worm are fixedly connected by a coupling, a drive shaft is installed in the inner cavity of the direction box, a turbine is installed on the outer ring of the drive shaft, and the turbine and the worm are meshed with each other;

[0010] The adjusting mechanism is installed on the top of the steering mechanism and is used for further adjustment of the clamp. The adjusting mechanism includes a lifting assembly, a rotating assembly and a clamping assembly. The lifting assembly is installed on the top of the steering mechanism and is used to adjust the angle of the clamping assembly. The rotating assembly is installed on the top of the lifting assembly and is used to provide driving force for the clamping assembly. The clamping assembly is installed on one side of the rotating assembly and is used to clamp the aluminum tube.

[0011] The drive motor starts and drives the worm to rotate through the coupling. The worm and the turbine mesh with each other, converting the rotation of the drive motor into the rotation of the turbine. The turbine then drives the drive shaft and the turntable on its top to rotate, and the turntable drives the rotation of the lifting assembly and the entire adjustment mechanism, thereby adjusting the overall direction of the fixture.

[0012] Preferably, a turntable is installed on the top of the driving shaft, the bottom of the lifting assembly is fixedly connected to the top of the turntable, the lifting assembly includes a driving arm seat, a servo motor is installed on the front of the driving arm seat, a transmission rod is installed on the output shaft of the servo motor, a connecting rod is hinged on the top of the transmission rod, and an arm seat is hinged on the top of the driving arm seat.

[0013] Preferably, a rotating seat is installed at the bottom of the arm seat, and the connecting rod and the rotating seat are rotationally connected via a pin.

[0014] The lifting assembly is used to adjust the angle of the clamping assembly. After the servo motor is started, the transmission rod drives the connecting rod to rotate around the pin of the rotating seat. Due to the hinged relationship between the connecting rod and the arm seat, the rotation of the connecting rod will drive the arm seat and the rotating assembly and clamping assembly on its top to move up and down, thereby adjusting the angle of the clamping assembly.

[0015] Preferably, the rotating assembly includes a rotating box installed on the top of the arm seat, a rotating motor is installed on the top of the rotating box, an output shaft of the rotating motor is fixedly connected to a rotating shaft, and a driving gear is installed on the outer ring of the rotating shaft.

[0016] Preferably, the rotating assembly further comprises a sleeve rod mounted on one side of the rotating box, the inner cavity of the sleeve rod is rotatably connected to a sleeve shaft, the outer ring of the sleeve shaft is mounted with a driven gear, and the driving gear and the driven gear are provided in three groups and mesh with each other respectively.

[0017] Preferably, a connecting seat is installed on the outer ring of the sleeve rod and is used to fix the sleeve rod to the rotating assembly and the clamping assembly, and the sizes of the driven gears are different.

[0018] The rotating assembly is used to provide driving force for the clamping assembly. The rotating motor is started to drive the rotating shaft and the driving gear on it to rotate. The driving gear meshes with the driven gear on the sleeve shaft, thereby driving the driven gear to rotate, thereby driving the sleeve shaft to rotate. The rotation of the sleeve shaft provides driving force for the subsequent clamping operation.

[0019] Preferably, the clamping assembly includes a clamping seat installed at the other end of the sleeve rod, the outer ring of the sleeve shaft is installed with a driving bevel gear, the inner cavity of the clamping seat is installed with a driven shaft, the outer ring of the driven shaft is installed with a driven bevel gear, the driving bevel gear and the driven bevel gear are meshed with each other, and the driving bevel gear and the driven bevel gear are each provided with two groups and are respectively meshed with each other.

[0020] Preferably, a control gear is installed on the outer ring of the driven shaft, and a connecting flange is also installed in the inner cavity of the clamping seat, a bidirectional screw is rotatably connected between the connecting flanges, a connecting gear is installed on the outer ring of the bidirectional screw, the connecting gear and the control gear are meshed with each other, and a movable plate is threadedly connected to the outer ring of the bidirectional screw, a limiting rod is fixedly connected in the inner cavity of the clamping seat, and the movable plate is slidably sleeved on the outer ring of the limiting rod.

[0021] Preferably, a clamping frame is installed on one side of the movable plate, and a clamping groove is provided in the inner cavity of the clamping frame.

[0022] The clamping assembly is used to clamp the aluminum tube. The driving bevel gear on the sleeve shaft meshes with the driven bevel gear on the driven shaft to convert the rotation of the sleeve shaft into the rotation of the driven shaft. The control gear on the driven shaft meshes with the connecting gear on the bidirectional screw rod, thereby driving the bidirectional screw rod to rotate. The rotation of the bidirectional screw rod causes the two moving plates to move relative to or opposite to each other along the direction of the limit rod. The two moving plates respectively drive the clamping frame and the clamping groove inside it to clamp or release the aluminum tube.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] 1. The present invention, by introducing a direction mechanism, utilizes a driving motor to drive the worm to rotate, and then drives the turbine and the driving shaft to rotate, thereby realizing flexible adjustment of the overall direction of the fixture, solving the single limitation of the traditional cutting fixture in the horizontal direction, and enabling the fixture to perform multi-angle precise positioning according to different cutting requirements, thereby greatly improving the flexibility and adaptability of the cutting operation.

[0025] 2. In the present invention, the lifting assembly and the rotating assembly in the adjustment mechanism cooperate with each other, so that the clamping assembly can not only adjust the angle in the vertical direction, but also realize various posture changes of rotation around the axis through the drive of the rotating assembly; this multi-degree-of-freedom adjustment capability ensures that the clamp can clamp aluminum tubes of different sizes and shapes and meet the diverse requirements of the clamp posture for complex cutting processes.

[0026] 3. In the present invention, the clamping assembly adopts the meshing transmission of the active bevel gear and the driven bevel gear, and the cooperation of the bidirectional screw and the moving plate, so as to achieve the precise clamping and stable release of the aluminum tube. This design not only improves the firmness and reliability of the clamping, but also simplifies the operation process, so that the operator can easily achieve the rapid clamping and release of the aluminum tube, and improves the work efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front perspective structural schematic diagram of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the direction box of the present invention;

[0029] Figure 3 It is a side view of the direction box of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the lifting assembly of the present invention;

[0031] Figure 5 is a side view of the lifting assembly of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the rotating assembly of the present invention;

[0033] Figure 7 It is a schematic diagram of the internal structure of the rotating assembly of the present invention;

[0034] Figure 8 For the present invention Figure 7 A magnified image of point A;

[0035] Fig. 9 It is a schematic structural diagram of the clamping assembly of the present invention.

[0036] Among them: 1. Support mechanism; 2. Steering mechanism; 3. Adjustment mechanism; 4. Lifting assembly; 5. Rotating assembly; 6. Clamping assembly; 101. Base; 102. Fixing plate; 103. Fixing hole; 201. Steering box; 202. Drive motor; 203. Bearing flange; 204. Worm; 205. Drive shaft; 206. Turbine; 207. Turntable; 401. Drive arm seat; 402. Servo motor; 403. Transmission rod; 405. Connecting rod; 406. Arm seat; 407. Rotating Seat; 501, rotating box; 502, rotating motor; 503, rotating shaft; 504, driving gear; 505, sleeve rod; 506, sleeve shaft; 507, driven gear; 508, connecting seat; 601, clamping seat; 602, active bevel gear; 603, driven shaft; 604, driven bevel gear; 605, control gear; 606, connecting flange; 607, two-way screw; 608, connecting gear; 609, moving plate; 610, limiting rod; 611, clamping frame; 612, clamping groove. DETAILED DESCRIPTION

[0037] 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.

[0038] See also Figure 1-Figure 9 In an embodiment of the present invention, a fixture for cutting an aluminum inner tube includes:

[0039] The supporting mechanism 1 includes a base 101, a fixing plate 102 is installed at the bottom of the base 101, and a fixing hole 103 is opened in the inner cavity of the fixing plate 102 and is used to fix the entire clamp;

[0040] A direction mechanism 2, which is installed on the top of the base 101 and is used to adjust the overall direction of the fixture. The direction mechanism 2 includes a direction box 201, and a drive motor 202 and a bearing flange 203 are installed on both sides of the direction box 201. A worm 204 is installed between the drive motor 202 and the bearing flange 203. The output shaft of the drive motor 202 is fixedly connected to the worm 204 through a coupling. A drive shaft 205 is installed in the inner cavity of the direction box 201, and a turbine 206 is installed on the outer ring of the drive shaft 205, and the turbine 206 and the worm 204 are meshed with each other;

[0041] The adjusting mechanism 3 is installed on the top of the steering mechanism 2 and is used for further adjustment of the clamp. The adjusting mechanism 3 includes a lifting assembly 4, a rotating assembly 5 and a clamping assembly 6. The lifting assembly 4 is installed on the top of the steering mechanism 2 and is used to adjust the angle of the clamping assembly 6. The rotating assembly 5 is installed on the top of the lifting assembly 4 and is used to provide driving force for the clamping assembly 6. The clamping assembly 6 is installed on one side of the rotating assembly 5 and is used to clamp the aluminum tube.

[0042] A turntable 207 is installed on the top of the driving shaft 205, and the bottom of the lifting component 4 is fixedly connected to the top of the turntable 207. The lifting component 4 includes a driving arm seat 401, a servo motor 402 is installed on the front of the driving arm seat 401, a transmission rod 403 is installed on the output shaft of the servo motor 402, a connecting rod 405 is hinged on the top of the transmission rod 403, and an arm seat 406 is hinged on the top of the driving arm seat 401.

[0043] A rotating seat 407 is installed at the bottom of the arm seat 406, and the connecting rod 405 and the rotating seat 407 are rotationally connected via a pin shaft.

[0044] The working principle of the embodiment of the present invention is: the fixture is connected to the cutting machine or other fixing device through the fixing hole 103 on the fixing plate 102 to ensure the stability of the fixture during operation. The base 101 serves as the supporting base of the entire fixture and can withstand various forces and vibrations generated during the cutting process. The direction mechanism 2 is installed on the top of the base 101 and is used to adjust the overall direction of the fixture. When the direction of the fixture needs to be adjusted, the drive motor 202 is started, and the worm 204 is driven to rotate through the coupling. The worm 204 and the turbine 206 are meshed with each other, converting the rotational motion of the drive motor 202 into the rotational motion of the turbine 206, thereby driving the drive shaft 205 and the turntable 207 on its top to rotate. The rotation of the turntable 207 drives the rotation of the lifting assembly 4 and the entire adjustment mechanism 3, thereby realizing the adjustment of the overall direction of the fixture.

[0045] The lifting assembly 4 is used to adjust the angle of the clamping assembly 6. After the servo motor 402 is started, the transmission rod 403 drives the connecting rod 405 to rotate around the pin of the rotating seat 407. Due to the hinged relationship between the connecting rod 405 and the arm seat 406, the rotation of the connecting rod 405 drives the arm seat 406 and the rotating assembly 5 and the clamping assembly 6 on the top thereof to move up and down, thereby realizing the adjustment of the angle of the clamping assembly 6.

[0046] See also Figure 1-Figure 9In the embodiment of the present invention, the rotating component 5 includes a rotating box 501 installed on the top of the arm seat 406, a rotating motor 502 is installed on the top of the rotating box 501, the output shaft of the rotating motor 502 is fixedly connected to the rotating shaft 503, and the outer ring of the rotating shaft 503 is installed with a driving gear 504. The rotating component 5 also includes a sleeve rod 505 installed on one side of the rotating box 501, the inner cavity of the sleeve rod 505 is rotatably connected to the sleeve shaft 506, and the outer ring of the sleeve shaft 506 is installed with a driven gear 507. There are three groups of driving gears 504 and driven gears 507, which are meshed with each other.

[0047] The outer ring of the sleeve rod 505 is equipped with a connecting seat 508 and is used to fix the sleeve rod 505 to the rotating assembly 5 and the clamping assembly 6. The sizes of the driven gears 507 are different.

[0048] The working principle of the embodiment of the present invention is: the rotating motor 502 is started, driving the rotating shaft 503 and the driving gear 504 thereon to rotate, and the driving gear 504 is meshed with the driven gear 507 on the sleeve shaft 506, thereby driving the driven gear 507 to rotate, and then driving the sleeve shaft 506 to rotate, thereby providing driving force for the clamping assembly 6, facilitating subsequent clamping operations.

[0049] See also Figure 1-Figure 9 In the embodiment of the present invention, the clamping assembly 6 includes a clamping seat 601 installed at the other end of the sleeve rod 505, a driving bevel gear 602 is installed on the outer ring of the sleeve shaft 506, a driven shaft 603 is installed in the inner cavity of the clamping seat 601, and a driven bevel gear 604 is installed on the outer ring of the driven shaft 603. The driving bevel gear 602 and the driven bevel gear 604 are meshed with each other, and the driving bevel gear 602 and the driven bevel gear 604 are both provided with two groups and are respectively meshed with each other.

[0050] A control gear 605 is installed on the outer ring of the driven shaft 603, and a connecting flange 606 is also installed in the inner cavity of the clamping seat 601. A bidirectional screw 607 is rotatably connected between the connecting flanges 606. A connecting gear 608 is installed on the outer ring of the bidirectional screw 607. The connecting gear 608 and the control gear 605 are meshed with each other. The outer ring of the bidirectional screw 607 is threadedly connected to a movable plate 609. A limiting rod 610 is fixedly connected in the inner cavity of the clamping seat 601, and the movable plate 609 is slidably sleeved on the outer ring of the limiting rod 610.

[0051] A clamping frame 611 is installed on one side of the movable plate 609 , and a clamping groove 612 is provided in the inner cavity of the clamping frame 611 .

[0052] The working principle of the embodiment of the present invention is as follows: the clamping assembly 6 is used to clamp the aluminum tube. When the aluminum tube needs to be clamped, the active bevel gear 602 on the sleeve shaft 506 and the driven bevel gear 604 on the driven shaft 603 are meshed with each other, so that the rotational motion of the sleeve shaft 506 is converted into the rotational motion of the driven shaft 603. The control gear 605 on the driven shaft 603 and the connecting gear 608 on the bidirectional screw rod 607 are meshed with each other, thereby driving the bidirectional screw rod 607 to rotate. The rotation of the bidirectional screw rod 607 causes the two moving plates 609 to move relative to or in the opposite direction along the direction of the limit rod 610, thereby driving the clamping frame 611 and the clamping groove 612 therein to clamp or release the aluminum tube.

[0053] Working principle: The drive motor 202 is started, and the worm 204 is driven to rotate through the coupling. The worm 204 and the turbine 206 are meshed with each other, and the rotational motion of the drive motor 202 is converted into the rotational motion of the turbine 206, which in turn drives the drive shaft 205 and the rotating disk 207 on the top to rotate. The rotation of the rotating disk 207 drives the rotation of the lifting assembly 4 and the entire adjustment mechanism 3, thereby realizing the adjustment of the overall direction of the fixture.

[0054] The lifting assembly 4 is used to adjust the angle of the clamping assembly 6. After the servo motor 402 is started, the transmission rod 403 drives the connecting rod 405 to rotate around the pin of the rotating seat 407. Due to the hinged relationship between the connecting rod 405 and the arm seat 406, the rotation of the connecting rod 405 drives the arm seat 406 and the rotating assembly 5 and the clamping assembly 6 on the top thereof to move up and down, thereby realizing the adjustment of the angle of the clamping assembly 6.

[0055] The rotating motor 502 is started, driving the rotating shaft 503 and the driving gear 504 thereon to rotate. The driving gear 504 is meshed with the driven gear 507 on the sleeve shaft 506, thereby driving the driven gear 507 to rotate, and then driving the sleeve shaft 506 to rotate, thereby providing driving force for the clamping assembly 6, which is convenient for subsequent clamping operations. The active bevel gear 602 on the sleeve shaft 506 is meshed with the driven bevel gear 604 on the driven shaft 603, converting the rotational motion of the sleeve shaft 506 into the rotational motion of the driven shaft 603. The control gear 605 on the driven shaft 603 is meshed with the connecting gear 608 on the bidirectional screw 607, thereby driving the bidirectional screw 607 to rotate. The rotation of the bidirectional screw 607 causes the two moving plates 609 to move relative to or in the opposite direction along the direction of the limit rod 610, thereby driving the clamping frame 611 and the clamping groove 612 therein to clamp or release the aluminum tube.

[0056] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for cutting aluminum inner tubes, It is characterized in that include: A support mechanism (1), the support mechanism (1) comprising a base (101), a fixing plate (102) being installed at the bottom of the base (101), a fixing hole (103) being provided in the inner cavity of the fixing plate (102) and being used for fixing the entire clamp; A direction mechanism (2), the direction mechanism (2) being mounted on the top of the base (101) and used for adjusting the overall direction of the fixture, the direction mechanism (2) comprising a direction box (201), a driving motor (202) and a bearing flange (203) being mounted on both sides of the direction box (201), a worm (204) being mounted between the driving motor (202) and the bearing flange (203), an output shaft of the driving motor (202) and the worm (204) being fixedly connected via a coupling, a driving shaft (205) being mounted in the inner cavity of the direction box (201), a turbine (206) being mounted on the outer ring of the driving shaft (205), and the turbine (206) and the worm (204) being meshed with each other; The adjusting mechanism (3) is installed on the top of the direction mechanism (2) and is used for further adjusting the clamp. The adjusting mechanism (3) comprises a lifting assembly (4), a rotating assembly (5) and a clamping assembly (6). The lifting assembly (4) is installed on the top of the direction mechanism (2) and is used for adjusting the angle of the clamping assembly (6). The rotating assembly (5) is installed on the top of the lifting assembly (4) and is used for providing a driving force for the clamping assembly (6). The clamping assembly (6) is installed on one side of the rotating assembly (5) and is used for clamping the aluminum tube.

2. A fixture for cutting aluminum inner tubes according to claim 1, Features: A turntable (207) is installed on the top of the driving shaft (205), the bottom of the lifting component (4) is fixedly connected to the top of the turntable (207), and the lifting component (4) includes a driving arm seat (401), a servo motor (402) is installed on the front of the driving arm seat (401), a transmission rod (403) is installed on the output shaft of the servo motor (402), a connecting rod (405) is hinged on the top of the transmission rod (403), and an arm seat (406) is hinged on the top of the driving arm seat (401).

3. A fixture for cutting aluminum inner tubes according to claim 2, Features: A rotating seat (407) is installed at the bottom of the arm seat (406), and the connecting rod (405) and the rotating seat (407) are rotatably connected via a pin shaft.

4. A fixture for cutting aluminum inner tubes according to claim 1, Features: The rotating assembly (5) includes a rotating box (501) installed on the top of the arm seat (406), a rotating motor (502) is installed on the top of the rotating box (501), the output shaft of the rotating motor (502) is fixedly connected to a rotating shaft (503), and the outer ring of the rotating shaft (503) is installed with a driving gear (504).

5. A jig for cutting aluminum inner tubes according to claim 4, Features: The rotating assembly (5) further comprises a sleeve rod (505) mounted on one side of the rotating box (501); the inner cavity of the sleeve rod (505) is rotatably connected to a sleeve shaft (506); the outer ring of the sleeve shaft (506) is mounted with a driven gear (507); and a total of three sets of the driving gear (504) and the driven gear (507) are arranged and mesh with each other.

6. A jig for cutting aluminum inner tubes according to claim 5, Features: The outer ring of the sleeve rod (505) is provided with a connecting seat (508) and is used to fix the sleeve rod (505) to the rotating assembly (5) and the clamping assembly (6). The sizes of the driven gears (507) are different.

7. A jig for cutting aluminum inner tubes according to claim 5, Features: The clamping assembly (6) comprises a clamping seat (601) mounted on the other end of the sleeve rod (505); a driving bevel gear (602) is mounted on the outer ring of the sleeve shaft (506); a driven shaft (603) is mounted in the inner cavity of the clamping seat (601); a driven bevel gear (604) is mounted on the outer ring of the driven shaft (603); the driving bevel gear (602) and the driven bevel gear (604) are meshed with each other; and two sets of the driving bevel gear (602) and the driven bevel gear (604) are respectively meshed with each other.

8. A jig for cutting aluminum inner tubes according to claim 7, Features: The outer ring of the driven shaft (603) is installed with a control gear (605), and a connecting flange (606) is also installed in the inner cavity of the clamping seat (601). A bidirectional screw (607) is rotatably connected between the connecting flanges (606). The outer ring of the bidirectional screw (607) is installed with a connecting gear (608). The connecting gear (608) and the control gear (605) are meshed with each other. The outer ring of the bidirectional screw (607) is threadedly connected with a movable plate (609). A limiting rod (610) is fixedly connected in the inner cavity of the clamping seat (601), and the movable plate (609) is slidably sleeved on the outer ring of the limiting rod (610).

9. A jig for cutting an aluminum inner tube according to claim 8, Features: A clamping frame (611) is installed on one side of the movable plate (609), and a clamping groove (612) is provided in the inner cavity of the clamping frame (611).

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