Air conditioner copper pipe fixed-length bending device

Abstract

The invention discloses an air conditioner copper pipe fixed-length bending device, and relates to the technical field of bending devices.The air conditioner copper pipe fixed-length bending device comprises a rack body, two sliding rods are arranged at the top of the rack body, the two ends of the two sliding rods are fixed to the top of the rack body through clamping bases, and a sliding table is slidably connected to the two sliding rods; a second copper pipe clamping assembly is fixed to the sliding table. A copper pipe rotating assembly is arranged on the inner side of the second copper pipe clamping assembly, and a first copper pipe clamping assembly is arranged on the side, away from the second copper pipe clamping assembly, of the copper pipe rotating assembly. The first copper pipe clamping assembly is fixed on the rack body; according to the copper pipe bending device, after first-time bending forming, the first copper pipe clamping assembly and the copper pipe rotating assembly release clamping of a copper pipe, at the moment, a cylinder rod of a sliding air cylinder stretches out, a sliding table drives the second copper pipe clamping assembly clamping the copper pipe to move forwards along a sliding rod, and therefore the copper pipe stretches out by a certain distance again; and secondary bending treatment of the copper pipe is facilitated.

Description

Technical Field

[0001] The invention specifically relates to the technical field of bending devices, in particular to a fixed-length bending device for an air-conditioning copper tube. Background Art

[0002] Copper tubes play a critical role as circulation channels for refrigerants (such as common Freon). The copper tubes in the evaporator are generally arranged in a serpentine shape, and are covered with aluminum fins on the outside to increase the heat dissipation (or heat absorption) area. When the air conditioner is cooling, the refrigerant flows in the copper tube, exchanges heat with the aluminum fins through the copper tube wall, absorbs heat from the indoor air, and thus reduces the indoor temperature; when heating, the opposite is true, and the heat is released into the room. For example, in the evaporator of an ordinary 1.5-horsepower wall-mounted air conditioner indoor unit, the diameter of the copper tube may be around 5 mm to 10 mm, and the length varies according to the specific model design. The overall winding distribution ensures that there is enough heat exchange area to meet the cooling and heating needs.

[0003] Chinese patent announcement No. CN 213052224 U provides an air-conditioning copper tube bending device, including a device base, a hydraulic cylinder is fixedly connected to one side of the top of the outer surface of the device base, a piston rod is fixedly installed on one side of the hydraulic cylinder, a connecting rod is fixedly connected to the end of the piston rod away from the hydraulic cylinder, the connecting rod is connected to a roller through a rotating shaft, a bottom plate is fixedly installed on the other side of the top of the outer surface of the device base, and a bender is movably connected to the top of the outer surface of the bottom plate.

[0004] The bending of the air-conditioning copper tube in the above patent is achieved by the cooperation of rollers and hydraulic cylinders, but the copper tube of the air-conditioning evaporator is arranged in a serpentine shape, so when bending, it is necessary to manually rotate the copper tube to achieve the bending of multiple U-shaped parts, and the spacing of the bending points of the copper tube of the evaporator is fixed. The above technical solution cannot perform fixed-length bending and requires manual assistance to complete, which leads to low efficiency in bending the air-conditioning tube. Summary of the invention

[0005] The purpose of the present invention is to provide a fixed-length bending device for air-conditioning copper tubes, which can automatically transfer a certain length after bending the copper tubes, and cooperate with a rotating assembly to achieve fixed-length bending of the copper tubes and bending at different angles, thereby meeting the bending requirements of air-conditioning evaporators and effectively improving the bending efficiency of copper tubes. To solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fixed-length bending device for an air-conditioning copper tube comprises a frame body, two slide bars are arranged on the top of the frame body, two ends of the two slide bars are fixed to the top of the frame body through clamping seats, and a sliding platform is slidably connected to the two slide bars, and a second copper tube clamping assembly is fixed on the sliding platform; a copper tube rotating assembly is arranged inside the second copper tube clamping assembly, two slide seats are fixed at the bottom of the copper tube rotating assembly, and the slide seats are slidably connected to the slide bars and fixed by bolts;

[0008] A first copper tube clamping assembly is provided on the side of the copper tube rotating assembly away from the second copper tube clamping assembly; the first copper tube clamping assembly is fixed on the frame body; a sliding cylinder is provided at the bottom of the copper tube rotating assembly, and the cylinder rod of the sliding cylinder is fixedly connected to the middle position of the bottom of the sliding platform;

[0009] A bending assembly is provided on the side of the second copper tube clamping assembly away from the copper tube rotating assembly. The bending assembly includes a fixed frame fixed on the frame body, a bending fixed die is fixed at the middle position of the top of the fixed frame, the bending fixed die is arranged in a fan shape, and the bending fixed die is coaxially movably connected to a movable bending die; the outer side of the movable bending die is driven and controlled by a bending cylinder.

[0010] As a further technical solution of the present invention, the bottom of the bending cylinder is fixed to the fixing frame through an articulated seat, and the cylinder rod of the bending cylinder is installed in cooperation with the movable bending die through a fisheye joint; a plurality of bending pressure wheels are movably connected inside the movable bending die.

[0011] As a further technical solution of the present invention, the first copper tube clamping assembly includes a mounting frame, the top of the mounting frame is movably connected to a flip frame via a rotating shaft, and a connecting seat is fixed on the outer side of an end of the flip frame away from the rotating shaft; the connecting seat is connected to the fisheye joint on the clamping cylinder rod via the rotating shaft, and the bottom of the clamping cylinder is fixed to the outer side of the mounting frame via a hinged seat.

[0012] As a further technical solution of the present invention, the bottom of the flip frame has a V-shaped groove; the top of the mounting frame and the bottom of the V-shaped groove are provided with three positioning blocks, and the three positioning blocks are distributed at equal intervals along the axis of the copper tube.

[0013] As a further technical solution of the present invention, the copper tube rotating assembly includes a rotating ring fixing seat, a rotating ring is rotatably connected inside the rotating ring fixing seat, and a transmission wheel is installed at one end of the rotating ring, and a copper tube internal fixing part is fixedly installed on the rotating ring.

[0014] As a further technical solution of the present invention, the transmission wheel is connected to the driving wheel through a belt; the driving wheel is installed on the output shaft of the reducer, and the input shaft of the reducer is connected to the motor through a coupling.

[0015] As a further technical solution of the present invention, the copper tube internal fixing member comprises two connecting plates, a plurality of slide grooves are provided on the two connecting plates, and a clamping shaft is slidably connected in the slide groove; a driving shaft is also provided between the two connecting plates;

[0016] A cylinder seat is also fixed inside the rotating ring. The cylinder seat is movably connected to the adjusting cylinder through a rotating shaft, and the cylinder rod end of the adjusting cylinder is connected to the driving shaft through a fisheye joint.

[0017] As a further technical solution of the present invention, a through hole is opened in the middle of the connecting disk for easy passage; a plurality of connecting shafts for fixing the two connecting disks are arranged in an array around the through hole; and a plurality of sliding grooves for sliding the clamping shaft are arranged in a circular array along the through hole.

[0018] As a further technical solution of the present invention, both ends of each clamping shaft also slide in a double round head groove opened at one end of the guide piece; the guide piece is fixed to the outer end of the rotating ring.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, when the copper tube is clamped and the cylinder rod of the clamping cylinder contracts, the turning frame is turned over with the cooperation of the connecting seat and the hinged seat, and is installed on the top of the mounting frame, so that the positioning block clamps and fixes the copper tube; the structure is simple and the operation is convenient, which can prevent the copper tube from rotating when being bent and causing the copper tube to fail to bend.

[0021] 2. The present invention clamps and fixes the copper tube by means of a fixing piece inside the copper tube. When the copper tube needs to be rotated, the motor drives the reducer to operate, and the rotating ring is driven to rotate a certain angle under the cooperation of the driving wheel, the belt and the transmission wheel, thereby meeting the bending requirements of the copper tube at different angles.

[0022] 3. In the present invention, after the first bending and forming, the first copper tube clamping assembly and the copper tube rotating assembly release the clamping of the copper tube. At this time, the cylinder rod of the sliding cylinder extends, so that the sliding platform drives the second copper tube clamping assembly clamping the copper tube to move forward along the sliding rod, so that the copper tube extends a certain distance to facilitate the secondary bending of the copper tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 2 The present invention Figure 1 The structural diagram on the right side of .

[0025] Figure 3 The present invention Figure 1 Schematic diagram of the bottom structure.

[0026] Figure 4 The present invention Figure 1 main view.

[0027] Figure 5 The present invention Figure 1 A partial enlarged schematic diagram of .

[0028] Figure 6 The present invention Figure 2 A partial enlarged schematic diagram of .

[0029] Figure 7 It is a structural schematic diagram of the copper tube rotating assembly in the present invention.

[0030] Figure 8 The present invention Figure 7 Schematic diagram from another perspective.

[0031] Fig. 9 It is a schematic diagram of the internal structure of the copper tube internal fixing member in the present invention.

[0032] Fig.10 The present invention Fig. 9 Schematic diagram of part of the structure.

[0033] In the figure: 1-frame body, 2-first copper tube clamping assembly, 3-copper tube rotating assembly, 4-second copper tube clamping assembly, 5-bending assembly, 6-sliding rod, 7-sliding platform, 8-sliding cylinder;

[0034] 21-mounting frame, 22-turning frame, 23-positioning block, 24-connecting seat, 25-clamping cylinder, 26-hinged seat;

[0035] 31-rotating ring fixing seat, 32-driving wheel, 33-copper tube internal fixing part, 34-rotating ring, 35-belt, 36-driving wheel, 37-reducer, 38-motor;

[0036] 331-connecting plate, 332-connecting shaft, 333-clamping shaft, 334-driving shaft, 335-adjusting cylinder, 336-cylinder seat, 337-guide plate;

[0037] 51-fixed frame, 52-bending fixed die, 53-movable bending die, 54-bending cylinder, 55-bending pressure wheel. DETAILED DESCRIPTION

[0038] 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.

[0039] See also Figures 1 to 10 In an embodiment of the present invention, a fixed-length bending device for an air-conditioning copper tube includes a frame body 1, two slide bars 6 are provided on the top of the frame body 1, both ends of the two slide bars 6 are fixed to the top of the frame body 1 through a clamping seat, and a sliding platform 7 is slidably connected to the two slide bars 6, and a second copper tube clamping assembly 4 is fixed on the sliding platform 7; a copper tube rotating assembly 3 is provided inside the second copper tube clamping assembly 4;

[0040] A first copper tube clamping assembly 2 is provided on the side of the copper tube rotating assembly 3 away from the second copper tube clamping assembly 4; the first copper tube clamping assembly 2 is fixed on the frame body 1; a sliding cylinder 8 is provided at the bottom of the copper tube rotating assembly 3, and the cylinder rod of the sliding cylinder 8 is fixedly connected to the middle position of the bottom of the sliding platform 7;

[0041] A bending assembly 5 is provided on the side of the second copper tube clamping assembly 4 away from the copper tube rotating assembly 3. The bending assembly 5 includes a fixed frame 51 fixed on the frame body 1, and a bending fixed mold 52 is fixed at the middle position of the top of the fixed frame 51. The bending fixed mold 52 is arranged in a fan shape, and the bending fixed mold 52 is coaxially movably connected to a movable bending mold 53; the outer side of the movable bending mold 53 is driven and controlled by a bending cylinder 54.

[0042] By adopting the above technical solution, when bending the copper tube, the copper tube is first passed through the first copper tube clamping assembly 2, the copper tube rotating assembly 3, the second copper tube clamping assembly 4 and the bending assembly 5 in sequence, then the first copper tube clamping assembly 2, the copper tube rotating assembly 3 and the second copper tube clamping assembly 4 all clamp the copper tube, and then the bending assembly 5 bends the copper tube;

[0043] After the first bending, the first copper tube clamping assembly 2 and the copper tube rotating assembly 3 release the clamping of the copper tube. At this time, the cylinder rod of the sliding cylinder 8 extends, so that the sliding platform 7 drives the second copper tube clamping assembly 4 clamping the copper tube to move forward along the sliding rod 6, so that the copper tube extends a distance to facilitate the secondary bending of the copper tube.

[0044] As a further illustration of this embodiment, two slide seats are fixed to the bottom of the copper tube rotating assembly 3, and the slide seats are slidably connected to the slide rod 6 and fixed by bolts.

[0045] After loosening the bolts, the copper tube rotating assembly 3 can move along the slide rod 6 toward the first copper tube clamping assembly 2, thereby increasing the distance between the copper tube rotating assembly 3 and the bending assembly 5, so that the second copper tube clamping assembly 4 has a longer distance to transport the copper tube, thereby achieving fixed-length transportation of the copper tube.

[0046] Please refer to the attached Figure 5 In this embodiment, the bottom of the bending cylinder 54 is fixed to the fixing frame 51 through a hinge seat, and the cylinder rod of the bending cylinder 54 is installed in cooperation with the movable bending die 53 through a fisheye joint; the movable bending die 53 is internally movably connected with a plurality of bending pressure wheels 55.

[0047] By adopting the above technical solution, when bending the copper tube, the copper tube is placed on the top of the bending fixed die 52, and multiple bending pressure wheels 55 are attached to the top of the copper tube; when the cylinder rod of the bending cylinder 54 contracts, the movable bending die 53 will selectively move along the circumferential direction of the bending fixed die 52, thereby realizing the bending process of the copper tube.

[0048] Please refer to the attached Figure 6 In this embodiment, the first copper tube clamping assembly 2 includes a mounting frame 21, the top of which is movably connected to a flip frame 22 via a rotating shaft, and a connecting seat 24 is fixed to the outer side of the end of the flip frame 22 away from the rotating shaft; the connecting seat 24 is connected to the fisheye joint on the cylinder rod of the clamping cylinder 25 via the rotating shaft, and the bottom of the clamping cylinder 25 is fixed to the outer side of the mounting frame 21 via a hinged seat 26.

[0049] Specifically, the bottom of the flip frame 22 has a V-shaped groove; the top of the mounting frame 21 and the bottom of the V-shaped groove are provided with three positioning blocks 23, and the three positioning blocks 23 are distributed at equal intervals along the axis of the copper tube.

[0050] By adopting the above technical solution, when the copper tube is clamped, when the cylinder rod of the clamping cylinder 25 contracts, the turning frame 22 is turned over with the cooperation of the connecting seat 24 and the hinged seat 26, and is installed on the top of the mounting frame 21, so that the positioning block 23 clamps and fixes the copper tube; the structure is simple and easy to operate, which can prevent the copper tube from rotating during bending and causing the copper tube to fail to bend.

[0051] Please refer to the attached Figures 7 to 10 In this embodiment, the copper tube rotating assembly 3 includes a rotating ring fixing seat 31, a rotating ring 34 is rotatably connected inside the rotating ring fixing seat 31, and a transmission wheel 32 is installed at one end of the rotating ring 34, and a copper tube internal fixing part 33 is fixedly installed on the rotating ring 34.

[0052] Specifically, the transmission wheel 32 is connected to the driving wheel 36 through a belt 35; the driving wheel 36 is installed on the output shaft of the reducer 37, and the input shaft of the reducer 37 is connected to the motor 38 through a coupling.

[0053] By adopting the above technical solution, the copper tube is clamped and fixed by the copper tube internal fixing part 33. When the copper tube needs to be rotated, the motor 38 drives the reducer 37 to operate, and the rotating ring 34 is driven to rotate a certain angle under the cooperation of the driving wheel 36, the belt 35 and the transmission wheel 32, thereby meeting the bending of the copper tube at different angles.

[0054] In this embodiment, the copper tube internal fixing member 33 includes two connecting plates 331, and a plurality of slide grooves are formed on the two connecting plates 331, and a clamping shaft 333 is slidably connected in the slide groove; a driving shaft 334 is also provided between the two connecting plates 331;

[0055] A cylinder seat 336 is also fixed inside the rotating ring 34. The cylinder seat 336 is movably connected to the adjustment cylinder 335 through a rotating shaft, and the cylinder rod end of the adjustment cylinder 335 is connected to the driving shaft 334 through a fisheye joint. A through hole is provided in the middle of the connecting disk 331 for easy passage; a plurality of connecting shafts 332 for fixing the two connecting disks 331 are arranged in an array around the through hole; and a plurality of sliding grooves for sliding the clamping shaft 333 are arranged in an annular array along the through hole.

[0056] More specifically, both ends of each clamping shaft 333 also slide in the double round head groove opened at one end of the guide piece 337; the guide piece 337 is fixed to the outer end of the rotating ring 34.

[0057] By adopting the above technical solution, when rotating the copper tube, it is necessary to first ensure that the copper tube rotating assembly 3 can fix the copper tube; the copper tube is located in the through hole in the middle of the connecting disk 331, and the clamping shaft 333 is also evenly distributed on the outside of the copper tube; when the cylinder rod of the adjustment cylinder 335 contracts, due to the limitation of the copper tube on the connecting disk 331, the connecting disk 331 rotates with the copper tube as the center, and the clamping shaft 333 arranged on the inner side slides along the slide groove on the connecting disk 331 and the double round head groove on the guide plate 337, so that multiple clamping shafts 333 move closer to the inside, thereby clamping and fixing the steel tube; the copper tube can be stably clamped when rotating.

[0058] The working principle is: when bending the copper tube, firstly, the copper tube passes through the first copper tube clamping assembly 2, the copper tube rotating assembly 3, the second copper tube clamping assembly 4 and the bending assembly 5 in sequence, then the first copper tube clamping assembly 2, the copper tube rotating assembly 3 and the second copper tube clamping assembly 4 all clamp the copper tube, and then the bending assembly 5 bends the copper tube;

[0059] After the first bending, the first copper tube clamping assembly 2 and the copper tube rotating assembly 3 release the clamping of the copper tube. At this time, the cylinder rod of the sliding cylinder 8 extends, so that the sliding platform 7 drives the second copper tube clamping assembly 4 clamping the copper tube to move forward along the sliding rod 6, so that the copper tube extends a distance to facilitate the secondary bending of the copper tube.

[0060] Since the copper tube of the air conditioner evaporator is arranged in a serpentine shape, each bending after the first bending requires the copper tube to rotate; when the copper tube rotates, the copper tube must first be clamped by the copper tube internal fixing part 33, and the copper tube is located in the through hole in the middle of the connecting disk 331, and the clamping shaft 333 is also evenly distributed on the outside of the copper tube; when the cylinder rod of the adjustment cylinder 335 is contracted, the connecting disk 331 is limited by the copper tube, so that the connecting disk 331 rotates around the copper tube as the center, and the clamping shaft 333 arranged on the inner side thereof slides along the sliding groove on the connecting disk 331 and the double round head groove on the guide plate 337, so that multiple clamping shafts 333 are brought closer to the inside, thereby clamping and fixing the steel tube; so that the copper tube can be stably clamped when rotating;

[0061] The motor 38 drives the reducer 37 to operate, and drives the rotating ring 34 to rotate a certain angle under the cooperation of the driving wheel 36, the belt 35 and the transmission wheel 32, so as to meet the bending of the copper tube at different angles.

[0062] Two slide seats are fixed at the bottom of the copper tube rotating assembly 3, and the slide seats are slidably connected to the slide rod 6 and fixed by bolts.

[0063] After loosening the bolts, the copper tube rotating assembly 3 can move along the slide rod 6 toward the first copper tube clamping assembly 2, thereby increasing the distance between the copper tube rotating assembly 3 and the bending assembly 5, so that the second copper tube clamping assembly 4 has a longer distance to transport the copper tube, thereby achieving fixed-length transportation of the copper tube.

[0064] By setting up the above scheme, the labor intensity of manual labor is effectively reduced and the bending efficiency of the copper tube is greatly improved.

[0065] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0066] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fixed-length bending device for air-conditioning copper tubes, characterized in that: The machine comprises a frame body (1), the top of which is provided with two slide bars (6), the two ends of the two slide bars (6) are fixed to the top of the frame body (1) via clamping seats, and the two slide bars (6) are slidably connected to a sliding platform (7), and a second copper tube clamping assembly (4) is fixed on the sliding platform (7); a copper tube rotating assembly (3) is provided on the inner side of the second copper tube clamping assembly (4), and two slide seats are fixed at the bottom of the copper tube rotating assembly (3), and the slide seats are slidably connected to the slide bars (6) and fixed by bolts; A first copper tube clamping assembly (2) is provided on the side of the copper tube rotating assembly (3) away from the second copper tube clamping assembly (4); the first copper tube clamping assembly (2) is fixed on the frame body (1); a sliding cylinder (8) is provided at the bottom of the copper tube rotating assembly (3), and the cylinder rod of the sliding cylinder (8) is fixedly connected to the middle position of the bottom of the sliding platform (7); A bending assembly (5) is provided on the side of the second copper tube clamping assembly (4) away from the copper tube rotating assembly (3), and the bending assembly (5) comprises a fixing frame (51) fixed on the frame body (1), a bending fixed die (52) is fixed at the middle position of the top of the fixing frame (51), the bending fixed die (52) is arranged in a fan shape, and the bending fixed die (52) is coaxially movably connected to a movable bending die (53); the outer side of the movable bending die (53) is driven and controlled by a bending cylinder (54).

2. The fixed-length bending device for air-conditioning copper tubes according to claim 1 is characterized in that: The bottom of the bending cylinder (54) is fixed to the fixing frame (51) via a hinged seat, and the cylinder rod of the bending cylinder (54) is installed in cooperation with the movable bending die (53) via a fisheye joint; the movable bending die (53) is movably connected with a plurality of bending pressure wheels (55) inside.

3. The fixed-length bending device for air-conditioning copper tubes according to claim 1 is characterized in that: The first copper tube clamping assembly (2) comprises a mounting frame (21), the top of which is movably connected to a flip frame (22) via a rotating shaft, and a connecting seat (24) is fixed on the outer side of an end of the flip frame (22) away from the rotating shaft; the connecting seat (24) is connected to a fisheye joint on a cylinder rod of a clamping cylinder (25) via the rotating shaft, and the bottom of the clamping cylinder (25) is fixed to the outer side of the mounting frame (21) via a hinge seat (26).

4. The fixed-length bending device for air-conditioning copper tubes according to claim 3 is characterized in that: The bottom of the flip frame (22) is provided with a V-shaped groove; the top of the mounting frame (21) and the bottom of the V-shaped groove are provided with three positioning blocks (23), and the three positioning blocks (23) are distributed at equal intervals along the axis of the copper tube.

5. The fixed-length bending device for air-conditioning copper tubes according to claim 1 is characterized in that: The copper tube rotating assembly (3) comprises a rotating ring fixing seat (31), a rotating ring (34) is rotatably connected inside the rotating ring fixing seat (31), a transmission wheel (32) is mounted on one end of the rotating ring (34), and a copper tube internal fixing part (33) is fixedly mounted on the rotating ring (34).

6. The fixed-length bending device for air-conditioning copper tubes according to claim 5 is characterized in that: The transmission wheel (32) is connected to the driving wheel (36) through a belt (35); the driving wheel (36) is mounted on the output shaft of a reducer (37); the input shaft of the reducer (37) is connected to the motor (38) through a coupling.

7. The fixed-length bending device for air-conditioning copper tubes according to claim 6 is characterized in that: The copper tube internal fixing member (33) comprises two connecting plates (331), a plurality of slide grooves are formed on the two connecting plates (331), and a clamping shaft (333) is slidably connected in the slide groove; a driving shaft (334) is also provided between the two connecting plates (331); A cylinder seat (336) is also fixed inside the rotating ring (34). The cylinder seat (336) is movably connected to the adjusting cylinder (335) via a rotating shaft, and the cylinder rod end of the adjusting cylinder (335) is connected to the driving shaft (334) via a fisheye joint.

8. The fixed-length bending device for air-conditioning copper tubes according to claim 7 is characterized in that: A through hole is provided in the middle of the connecting disk (331) for easy passage; a plurality of connecting shafts (332) for fixing the two connecting disks (331) are arranged in an array around the through hole; and a plurality of sliding grooves for sliding the clamping shaft (333) are arranged in an annular array along the through hole.

9. The fixed-length bending device for air-conditioning copper tubes according to claim 8, characterized in that: Both ends of each clamping shaft (333) slide in a double round head groove opened at one end of the guide piece (337); the guide piece (337) is fixed to the outer end of the rotating ring (34).

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