Pipe bending machine for basketball stand machining

Abstract

The invention relates to the technical field of pipe bending equipment, and provides a pipe bending machine for basketball stand processing, which comprises a rack assembly and a bending assembly, the bending assembly comprises a center die, a first arc-shaped half die, a second arc-shaped half die and a driving mechanism. The driving mechanism is used for driving the first arc-shaped half die, the second arc-shaped half die and the center die to be close to each other to be in an abutting state. The center mold comprises a round base, a plurality of movable inserts arranged on the surface of the round base in a sliding mode and a pushing mechanism used for forcing all the movable inserts to move outwards. The upper edge of the circular base is provided with a first concave arc, the lower edge of each movable insert is provided with a second concave arc, and in the bending operation state, each movable insert moves outwards to the limit position; the circular base is further provided with a reset mechanism used for forcing all the movable inserts to move inwards and gather together. On the basis, the pipe fitting can be conveniently taken out after being bent and formed, and the convenience of material taking operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of pipe bending equipment, and in particular to a pipe bending machine for processing basketball stands. Background Art

[0002] A basketball hoop is an essential piece of equipment in basketball. It provides a target for players to shoot from and is a key feature in both competition and training. Its structural components primarily include a backboard, a hoop, a support frame, and a base. The hoop is a standard circular ring on the hoop, typically made of metal with a diameter of approximately 45 cm.

[0003] The processing of basketball hoops typically requires placing pipes on a pipe bender for bending. A Chinese patent application with publication number CN116116960A discloses a pipe bender for basketball hoops, comprising a machine base, a bending device, a pipe bending device, and a cleaning device. The cleaning device includes a placement seat having an inner cavity for placing pipes, and the placement seat is slidably disposed between the bending device and the pipe bending device. During use, the pipe to be bent is placed in the inner cavity of the placement seat, and the servo motor in the bending device is controlled to force the pipe to collide with the pressure plate, thereby facilitating the bending of the pipe at an angle, achieving an automatic bending effect.

[0004] Regarding the above-mentioned related technical solutions, since the pipe fittings are directly inserted into the inner cavity of the placement seat for positioning, it is difficult to remove the bent pipe from the inner cavity after the pipe fittings are bent and formed. The material removal operation is very inconvenient, time-consuming and labor-intensive, and needs to be improved. Summary of the invention

[0005] Based on this, the present application provides a pipe bending machine for basketball stand processing, which can easily remove the pipe after it is press-bent and formed, thereby improving the convenience of the material removal operation.

[0006] The present application provides a pipe bending machine for basketball stand processing that adopts the following technical solutions: A pipe bending machine for manufacturing basketball hoops comprises a frame assembly and a press-bending assembly disposed on a surface of the frame assembly; the press-bending assembly comprises a central mold, a first arcuate half mold, a second arcuate half mold, and a driving mechanism; the first arcuate half mold and the second arcuate half mold are respectively located on opposite sides of the central mold, and an inner cavity is provided on the outer periphery of the central mold; the inner curved surface of the first arcuate half mold and the inner curved surface of the second arcuate half mold are both provided with an outer cavity; the driving mechanism is used to drive the first arcuate half mold, the second arcuate half mold, and the central mold to move closer to each other until they are in contact with each other, at which point a forming area adapted to the shape of the basketball frame is formed between the inner cavity and the two outer cavities; Among them, the central mold includes a circular base, a plurality of moving inserts slidably arranged on the surface of the circular base, and a pushing mechanism for forcing each moving insert to move outward. All the moving inserts are arranged at intervals around the central axis of the circular base, and the moving direction of each moving insert is the same as the radial direction of the circular base; A first concave arc is provided on the upper edge of the circular base, and a second concave arc is provided on the lower edge of each moving insert. In the bending operation state, the pushing mechanism can force each moving insert to move outward to the limit position. At this time, the first concave arc and each second concave arc jointly enclose an inner cavity; The circular base is also provided with a reset mechanism. When the pushing mechanism disengages from the moving insert, the reset mechanism can force each moving insert to move inward and gather together.

[0007] Optionally, the second arc-shaped half mold is fixedly arranged on the frame assembly, and the first arc-shaped half mold and the central mold are both slidably arranged on the frame assembly, and there is a placement station for placing the pipe between the first arc-shaped half mold and the central mold; A locking mechanism is provided between the central mold and the frame assembly, and the locking mechanism is used to limit the movement of the central mold in the direction close to the second arc-shaped half mold; The driving mechanism is arranged between the first arc-shaped half mold and the frame assembly. In the first-stage bending operation, the driving mechanism forces the first arc-shaped half mold to approach the central mold. At this time, the central mold is positioned by the locking mechanism; In the second-stage bending operation, when the first arc-shaped half mold abuts against the central mold, the locking mechanism is forced to unlock. At this time, the first arc-shaped half mold pushes the central mold to move in the direction close to the second arc-shaped half mold, so as to realize that the first arc-shaped half mold, the central mold and the second arc-shaped half mold approach each other to the abutting state.

[0008] Optionally, a support pillar portion protrudes from the side of the first arc-shaped half mold close to the second arc-shaped half mold. The number of support pillar portions is two and they are respectively arranged on the two side edges of the first arc-shaped half mold. The two support pillar portions jointly form a placement station; The frame assembly is fixedly provided with two track plates, and the two track plates are respectively located on two opposite sides of the placement station, and the distance between the two track plates matches the axial length of the pipe.

[0009] Optionally, a sliding base is fixed at the bottom of the central mold, and the central mold is slidably connected to the frame assembly through the sliding base; An extension column is fixedly installed on the side of the sliding base; The locking mechanism includes a fixed base, a hook-shaped plate rotatably connected to the fixed base, and a torsion spring arranged between the hook-shaped plate and the fixed base. The hook-shaped plate is provided with a hook opening for cooperating with the extension column. In the first-stage bending operation, the extension column and the hook opening cooperate for limiting; The torsion spring is used to force the abutting portion to rotate towards the fixed base in the normal state. At this time, the hook-shaped plate is on the moving path of the extension column, and when the central mold moves and resets, the extension column can abut against the hook-shaped plate and force the hook-shaped plate to rotate away from the fixed base.

[0010] Optionally, a guiding portion is provided on the side surface of the hook-shaped plate, and the guiding portion is inclined under normal conditions; a guiding post is arranged outside the first arc-shaped half die, the guiding post is arranged opposite to the guiding portion along the moving direction of the first arc-shaped half die, and after the first-stage bending operation, the guiding post can abut against the guiding portion and force the hook-shaped plate to rotate away from the fixed base, so as to smoothly disengage the extension post from the hanging opening.

[0011] Optionally, the pushing mechanism includes a central shaft, a pushing seat and a base plate. The central shaft is movably inserted through the circular base and is coaxial with the circular base. The pushing seat is fixedly connected to the top end of the central shaft and is located above the circular base. The base plate is fixedly connected to the bottom end of the central shaft and is located below the circular base; a linear driving member is arranged between the base plate and the circular base. When the linear driving member acts, the pushing seat enters between the moving inserts and forces the moving inserts to move outwards.

[0012] Optionally, a rotating seat is fixed at the bottom of the circular base, a sliding base is rotatably sleeved on the outer peripheral side of the rotating seat, and the central die is slidably connected to the frame assembly through the sliding base; the fixed end of the linear driving member is fixed to the rotating seat to realize the circumferential linkage between the linear driving member and the circular base; A plurality of linkage portions are arranged on the outer peripheral side of the pushing seat. When the linear driving member acts, the linkage portions are matched and clamped in the area between two adjacent moving inserts to realize the circumferential linkage between the pushing seat and the circular base; an operating mechanism for forcing the circular base to rotate is also arranged at the bottom of the frame assembly.

[0013] Optionally, the operating mechanism includes a sliding support slidably mounted on the frame assembly, an operating handle rotatably mounted on the sliding support, a first bevel gear fixedly connected to the end of the operating handle, and a second bevel gear fixed to the bottom of the base plate; the sliding support is connected to the sliding base. When the driving mechanism acts, the second bevel gear moves towards the first bevel gear and finally meshes with the first bevel gear for transmission.

[0014] Optionally, the second arc-shaped half die includes two forming die seats arranged in a mirror image. An inner groove is provided on the inner arc side of each forming die seat; wherein, the forming die seat is slidably connected to the frame assembly, and the moving directions of the two forming die seats are arranged at an angle. When the central die abuts against the two forming die seats and forces the two forming die seats to move, the two forming die seats can approach each other to an abutting state, and at this time, the two inner grooves jointly form an outer cavity.

[0015] Optionally, a plurality of wedge-shaped chutes are provided on the surface of the circular base, and the extending direction of the wedge-shaped chutes is the same as the radial direction of the circular base; a wedge-shaped slider is provided at the bottom of each moving insert, and the wedge-shaped slider is slidably mounted inside the wedge-shaped chute; The reset mechanism includes a limit plate and a magnetic assembly. The limit plate is fixed to the surface of the circular base and is located inside each wedge-shaped slide groove. The number of magnetic assemblies matches the number of wedge-shaped sliders. Each magnetic assembly includes a first magnet fixedly embedded in the wedge-shaped slider and a second magnet fixedly embedded in the limit plate. The magnetic poles of the first magnet and the second magnet are opposite.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. By placing the pipe to be bent on the placement station between the first arc-shaped half mold and the center mold, the drive mechanism is controlled to drive the first arc-shaped half mold, the second arc-shaped half mold and the center mold to move closer to each other until they are in contact. The pipe can be bent into a shape that matches the forming area, thereby obtaining the desired spherical frame shape.

[0017] 2. By arranging multiple movable inserts on the circular base, during the bending operation, the push seat of the push mechanism enters the middle of each movable insert, forcing each movable insert to move outward to the extreme position. At this time, the first concave arc and each second concave arc can jointly enclose an inner cavity to facilitate the smooth bending of the pipe. After the bending operation is completed and the push seat moves upward to separate from each movable insert, the movable insert can automatically move toward the limit plate using the magnetic attraction of the magnetic assembly, thereby forcing each movable insert to retract and automatically enter the inner side of the outer edge area of the circular base. At this time, the bent pipe can be directly and conveniently removed from the circular base, greatly improving the convenience of the material removal operation.

[0018] 3. During the first bending operation, the central die remains stationary thanks to the stoppered position between the hook plate and the extension post. Driven by the drive mechanism, the first curved half-die gradually approaches the central die, smoothly bending the tube into a U-shape. Then, as the first curved half-die continues to move, the guide post on the outside of the first curved half-die abuts the guide portion of the hook plate, forcing the hook plate to rotate away from the extension post, allowing the extension post to smoothly disengage from the hook plate. At this point, the first curved half-die pushes the central die, moving together toward the second curved half-die, further bending the tube into a circular ring.

[0019] 4. By arranging multiple linkage parts on the outer side of the push seat, when the linear drive member is actuated to force the push seat to enter the middle of each movable insert, the linkage part can match and enter the area between adjacent movable inserts to realize the circumferential linkage between the push seat and the circular base; if the end of the U-shaped tube fitting cannot smoothly enter the outer cavity of the second arc-shaped half mold after the first section of the bending operation is completed, the operator can control the operating handle to force the circular base and the U-shaped tube fitting to rotate, and then the U-shaped tube fitting can be partially bent again, which is conducive to the end of the U-shaped tube fitting to smoothly enter the outer cavity.

[0020] 5. By setting two forming die bases which are far away from each other in the initial state, the distance between the inner grooves of the two forming die bases is relatively large at this time, which is beneficial to the smooth entry of the end of the U-shaped pipe fitting into the inner groove after the first-stage bending operation of the pipe fitting, and thus helps the pipe fitting to be smoothly bent into a circular ring shape. Description of the Drawings

[0021] Figure 1 is the overall structural schematic diagram of the embodiment of the present application; Figure 2 is the disassembly and assembly structural diagram of the top plate of the frame, the first arc-shaped half die and the second arc-shaped half die in the embodiment of the present application; Figure 3 is the bottom structural schematic diagram of the top plate of the frame in the embodiment of the present application; Figure 4 is the bottom view structural diagram of the center die in the embodiment of the present application; Figure 5 is the top view structural diagram of the center die in the embodiment of the present application; Figure 6 is the structural schematic diagram of the movable insert in the embodiment of the present application; Figure 7 is the structural schematic diagram of the center die and the operating mechanism in the embodiment of the present application; Figure 8 is the matching structural diagram of the locking mechanism and the extension column in the embodiment of the present application; Figure 9 is the half-sectional structural diagram of the first arc-shaped half die in the embodiment of the present application.

[0022] Description of the reference numerals: 1. Frame assembly; 11. Top plate of the frame; 12. Bottom plate of the frame; 13. Support column; 14. Sliding groove; 15. Slideway opening; 16. Spring seat; 17. First spring; 2. Center die; 21. Circular base; 211. Wedge-shaped sliding groove; 212. Center groove; 213. First concave arc; 22. Movable insert; 221. Wedge-shaped slider; 222. Second concave arc; 23. Pushing mechanism; 231. Central shaft; 232. Pushing seat; 233. Base plate; 234. Linear driving member; 235. Linking part; 24. Rotating seat; 25. Sliding base; 251. Extension column; 26. Inner cavity; 27. Limiting disk; 28. Magnetic attraction assembly; 281. First magnet; 282. Second magnet; 3. First arc-shaped half die; 31. Slide post block; 311. Guide post; 312. Second spring; 32. Outer cavity; 33. Support pillar part; 34. Placing station; 4. Second arc-shaped half die; 41. Forming die base; 42. Inner groove; 43. Avoidance groove; 44. Slide rail; 5. Driving mechanism; 51. Threaded rod; 52. Driving motor; 53. Guide rod; 6. Operating mechanism; 61. Sliding support; 611. Connecting column; 62. Operating handle; 63. First bevel gear; 64. Second bevel gear; 7. Track plate; 71. Limit guide rail; 8. Locking mechanism; 81. Fixed base; 82. Hook-shaped plate; 821. Hooking opening; 822. Abutting portion; 823. Guiding portion; 83. Torsion spring. Detailed implementation manner

[0023] The following will Figure 1 - attached Figure 9 make a further detailed description of this application.

[0024] The embodiment of this application discloses a pipe bender for basketball hoop processing.

[0025] Refer to Figure 1 , a pipe bender for basketball hoop processing, including a frame assembly 1 and a bending assembly; the frame assembly 1 includes a frame top plate 11 and a frame bottom plate 12. Support columns 13 are respectively fixed at the four corners of the top surface of the frame bottom plate 12, and the frame top plate 11 is fixedly connected to the support columns 13, so as to be fixedly erected above the frame bottom plate 12. The bending assembly is arranged on the surface of the frame top plate 11. The bending assembly includes a center die 2, a first arc half die 3, a second arc half die 4 and a driving mechanism 5. The first arc half die 3 and the second arc half die 4 are respectively arranged on two opposite sides of the center die 2; the driving mechanism 5 is used to drive the first arc half die 3, the center die 2 and the second arc half die 4 to approach each other, and finally the three can be mutually abutted to realize the bending and forming of the pipe fitting.

[0026] Refer to Figure 2 , the first arc half die 3 is integrally arranged in a C shape. An outer cavity 32 is formed on the inner arc surface of the first arc half die 3, and the outer cavity 32 penetrates through both ends of the first arc half die 3 in the arc direction; it should be noted here that the cross-sectional shape of the outer cavity 32 is semi-circular, and the inner diameter dimension of the outer cavity 32 is equal to the outer diameter dimension of the pipe fitting to be bent. Two sliding block 31 are fixed on the bottom surface of the first arc half die 3, and the two sliding block 31 are respectively located at the two side edges of the first arc half die 3; two sliding grooves 14 are formed on the frame top plate 11, the two sliding grooves 14 are arranged side by side, and the extending direction of the sliding grooves 14 is the same as the length direction of the frame top plate 11; the two sliding block 31 are respectively slidably installed in the two sliding grooves 14, so that the first arc half die 3 is slidably arranged on the frame top plate 11.

[0027] Refer to Figure 3, the driving mechanism 5 is arranged between the first arc-shaped half die 3 and the frame assembly 1; specifically, the driving mechanism 5 includes a threaded rod 51, a driving motor 52 and a guide rod 53. The guide rod 53 is fixedly installed at the bottom of the frame top plate 11, and the guide rod 53 passes through one of the sliding column blocks 31 to play a guiding role. The threaded rod 51 is rotatably installed at the bottom of the frame top plate 11, and the threaded rod 51 passes through the other sliding column block 31 and is threadedly connected to the sliding column block 31; the driving motor 52 is fixed to the bottom of the frame top plate 11, and the output end of the driving motor 52 is coaxially connected to the threaded rod 51; by controlling the operation of the driving motor 52, the threaded rod 51 can be rotated, thereby forcing the sliding column block 31 and the first arc-shaped half die 3 to move along the axis direction of the threaded rod 51. It should be noted here that the threaded rod 51 is horizontally arranged between the first arc-shaped half die 3 and the second arc-shaped half die 4, and can drive the first arc-shaped half die 3 to move to abut against the second arc-shaped half die 4.

[0028] Back to Figure 2 , the second arc-shaped half die 4 is integrally arranged in a C shape, and the specific shape is the same as that of the first arc-shaped half die 3; the second arc-shaped half die 4 in this embodiment includes two forming die bases 41, which are mirror-symmetrically arranged between the two forming die bases 41, and each forming die base 41 is slidably installed on the surface of the frame top plate 11 through a slide rail 44. It should be noted that the extending directions of the two slide rails 44 are arranged at an angle, and this angle is an obtuse angle in this embodiment; the distance between the two slide rails 44 gradually decreases from the side close to the first arc-shaped half die 3 to the other side. Based on this, when the two forming die bases 41 are forced to move away from the first arc-shaped half die 3, the two forming die bases 41 can approach each other and finally abut against each other, so that the second arc-shaped half die 4 is fixed on the frame top plate 11.

[0029] It should be noted here that in order to enable the two forming die bases 41 to move synchronously, telescopic rods (not shown in the figure) can be installed at the bottoms of the two forming die bases 41, and the axial direction of the telescopic rods needs to be the same as the width direction of the frame assembly 1. In addition, a resetting member (not shown in the figure) is arranged on the opposite side surfaces of the two forming die bases 41. The resetting member can be a magnet or a spring, and can always generate a force acting on the two forming die bases 41 and force the two forming die bases 41 to move away from each other under normal conditions.

[0030] An inner groove 42 is provided on the inner arc surface of each forming die base 41. The inner groove 42 penetrates through both ends of the forming die base 41 in the arc direction, and the cross-sectional shape of the inner groove 42 is semi-circular, and the specific inner diameter size is equal to the outer diameter size of the pipe fitting to be bent; when the two forming die bases 41 move synchronously to the abutting state, the two inner grooves 42 can jointly enclose to form the outer cavity 32 of the second arc-shaped half die 4.

[0031] Refer to Figure 4, the central die 2 includes a circular base 21, a movable insert 22 and a pushing mechanism 23. A rotating base 24 is coaxially fixed to the bottom of the circular base 21, and a sliding base 25 is rotatably sleeved on the outer peripheral side of the rotating base 24. At the same time, refer to Figure 2 , a slideway opening 15 is provided on the top plate 11 of the frame. The slideway opening 15 is located between two sliding grooves 14. The sliding base 25 is slidably installed in the slideway opening 15, so that the central die 2 is slidably arranged on the top plate 11 of the frame.

[0032] Refer to Figure 5 , a plurality of wedge-shaped sliding grooves 211 are provided on the surface of the circular base 21. The width of the notch of the wedge-shaped sliding groove 211 is smaller than the width of the groove bottom. The extending direction of each wedge-shaped sliding groove 211 is the same as the radial direction of the circular base 21, and all the wedge-shaped sliding grooves 211 are arranged equidistantly around the central axis of the circular base 21. The number of movable inserts 22 is equal to the number of wedge-shaped sliding grooves 211. At the same time, refer to Figure 6 , a wedge-shaped slider 221 is fixedly connected to the bottom of each movable insert 22. The shape of the wedge-shaped slider 221 is adapted to that of the wedge-shaped sliding groove 211. Through the cooperation between the wedge-shaped slider 221 and the wedge-shaped sliding groove 211, the movable insert 22 can be slidably installed on the surface of the circular base 21.

[0033] In addition, referring back to Figure 5 , a central groove 212 is coaxially arranged on the surface of the circular base 21. Each wedge-shaped sliding groove 211 is communicated with the central groove 212. Based on this, when specifically installing the movable insert 22, the wedge-shaped slider 221 can enter the wedge-shaped sliding groove 211 through the central groove 212. The circular base 21 is provided with a reset mechanism, and the reset mechanism includes a limit disk 27 and a magnetic attraction assembly 28. The limit disk 27 is coaxially fixed to the inner bottom wall of the central groove 212, which can play a limiting role and reduce the situation that the wedge-shaped slider 221 directly disengages from the wedge-shaped sliding groove 211 after moving inward.

[0034] Refer to Figure 5 , Figure 6 , a plurality of groups of magnetic attraction assemblies 28 are provided, and the number is equal to the number of wedge-shaped sliders 221. Among them, the magnetic attraction assembly 28 includes a first magnet 281 and a second magnet 282. The first magnet 281 is fixedly embedded in the side surface of the wedge-shaped slider 221 close to the limit disk 27, and the second magnet 282 is fixedly embedded in the outer peripheral surface of the limit disk 27. In this embodiment, the magnetic poles of the first magnet 281 and the second magnet 282 are opposite, so that there is always magnetic attraction between the two. Under the action of the magnetic attraction, the movable insert 22 can move inward and be completely located inside the outer edge area of the circular base 21, so that the movable inserts 22 are gathered together.

[0035] Refer back to Figure 4, the pushing mechanism 23 includes a central shaft 231, a pushing seat 232, a base plate 233 and a linear driving member 234. The central shaft 231 is movably inserted through the circular base 21 and the rotating seat 24, and the central shaft 231 is coaxial with the circular base 21. The pushing seat 232 is fixedly connected to the top end of the central shaft 231 and is located above the top plate 11 of the frame, and the base plate 233 is fixedly connected to the bottom end of the central shaft 231 and is located below the top plate 11 of the frame. The linear driving member 234 is set as a linear cylinder. The linear driving member 234 is fixed to the bottom of the rotating seat 24, and the movable end of the linear driving member 234 is fixedly connected to the base plate 233.

[0036] In this embodiment, the linear driving member 234 is in a normally retracted state. At this time, the pushing seat 232 can be located above the moving inserts 22. When the movable end of the linear driving member 234 extends outwards, the base plate 233, the central shaft 231 and the pushing seat 232 move downwards together. The pushing seat 232 can enter between the moving inserts 22 and force the moving inserts 22 to move outwards. Finally, the wedge-shaped slider 221 can abut against the inner wall of the wedge-shaped chute 211 away from the central groove 212, so that each moving insert 22 is in the limit position. This state is defined as the bending operation state. It can be understood that in order to facilitate the pushing seat 232 to push the moving inserts 22 outwards, the top edge of the moving insert 22 and the bottom outer edge of the pushing seat 232 can be provided with inclined guides.

[0037] Refer to Figure 5 , it should be noted here that the upper edge of the circular base 21 is provided with a first concave arc 213, and the lower edge of each moving insert 22 is provided with a second concave arc 222. In the bending operation state, the first concave arc 213 and the second concave arc 222 can jointly enclose an inner cavity 26, and the inner diameter of the inner cavity 26 is equal to the outer diameter of the pipe fitting to be bent. Based on this, when the driving motor 52 drives the first arc-shaped half mold 3, the central mold 2 and the second arc-shaped half mold 4 to move to abut against each other, the inner cavity 26 and the two outer cavities 32 can jointly form a forming area with the same shape as the ball frame.

[0038] In addition, a plurality of linkage parts 235 are arranged on the outer peripheral side of the pushing seat 232. All the linkage parts 235 are arranged equidistantly around the central axis of the pushing seat 232, and each linkage part 235 is integrally formed with the pushing seat 232. When the movable end of the linear driving member 234 extends outwards and the pushing seat 232 moves downwards to abut against the limit disc 27, each linkage part 235 can be matched and enter the area between two adjacent moving inserts 22, so that when the pushing seat 232 rotates, the circular base 21 can follow the rotation, realizing the circumferential linkage setting between the two. The frame assembly 1 is also provided with an operating mechanism 6. By controlling the operating mechanism 6, the pushing seat 232 can be forced to rotate and drive the circular base 21 to rotate together.

[0039] Specifically refer toFigure 7 The operating mechanism 6 includes a sliding support 61, an operating handle 62, a first bevel gear 63 and a second bevel gear 64. The sliding support 61 is slidably mounted on the surface of the frame bottom plate 12, and the operating handle 62 is rotatably mounted on the sliding support 61. The first bevel gear 63 is coaxially fixed to the end of the operating handle 62, and the second bevel gear 64 is coaxially fixed to the bottom of the base plate 233. When the movable end of the linear driving member 234 extends outwards, the second bevel gear 64 can mesh with the first bevel gear 63 for transmission. Thus, when the operator shakes the operating handle 62, the circular base 21 can be rotated. It should be noted here that the sliding support 61 is connected to the sliding base 25 through a plurality of connecting columns 611, so that the sliding support 61 can move along with the sliding base 25 when the sliding base 25 moves, ensuring that the first bevel gear 63 can always be directly opposite to the second bevel gear 64.

[0040] Back to Figure 2 On the side of the first arc-shaped half mold 3 close to the second arc-shaped half mold 4, a support column part 33 is convexly provided. The number of the support column parts 33 is two, and the two support column parts 33 are respectively arranged at the two side edges of the first arc-shaped half mold 3. The two support column parts 33 can jointly form a placement station 34 for placing pipe fittings. It can be known that the placement station 34 is located between the first arc-shaped half mold 3 and the center mold 2 in this embodiment. It should be noted that an avoidance groove 43 is provided on the side of each forming die base 41 close to the first arc-shaped half mold 3, and the shape of the avoidance groove 43 is adapted to the shape of the support column part 33, so that the support column part 33 can be matched and inserted into the avoidance groove 43 when the first arc-shaped half mold 3 abuts against the forming die base 41.

[0041] Back to Figure 1 Above the frame top plate 11, two track plates 7 are fixed. The two track plates 7 are respectively located on two opposite sides of the placement station 34. A limiting guide rail 71 is provided on the side of each track plate 7 close to the other track plate 7. The distance between the two track plates 7 is equal to the axial length of the pipe fitting to be bent. During the bending operation, first, the pipe fitting is placed obliquely on the placement station 34, and then the pipe fitting is rotated so that the two ends of the pipe fitting respectively enter the two limiting guide rails 71, which can limit the jumping of the pipe fitting during the bending operation.

[0042] Refer to Figure 3, a spring seat 16 is fixed to the bottom of the frame top plate 11. The spring seat 16 is located at the bottom of the second arc half die 4, and a first spring 17 is arranged between the spring seat 16 and the sliding base 25. The first spring 17 can always generate an elastic force acting on the sliding base 25, thereby forcing the sliding base 25 to move to abut against the inner wall of the slide port 15 away from the second arc half die 4 in the normal state, which is the initial reset state. A locking mechanism 8 is also provided between the sliding base 25 and the frame assembly 1. When the sliding base 25 is in the initial reset state, the locking mechanism 8 can limit the movement of the center die 2 in the direction approaching the second arc half die 4. At this time, the center die 2 remains relatively fixed, and when the first arc half die 3 drives the pipe fitting towards the center die 2, the pipe fitting can be smoothly bent.

[0043] During the entire process of pipe fitting bending and forming, the first-stage bending operation and the second-stage bending operation can be carried out respectively. In the first-stage bending operation, the driving motor 52 operates to force the first arc half die 3 to move towards the center die 2. At this time, the center die 2 remains fixed under the restriction of the locking mechanism 8, enabling the pipe fitting to be smoothly bent into a U shape. After the first arc half die 3 closely abuts against the center die 2, the locking mechanism 8 releases the limiting effect on the center die 2 and enters the second-stage bending operation; in this stage, the driving motor 52 operates to force the first arc half die 3 and the center die 2 to move towards the second arc half die 4 together. Finally, the first arc half die 3, the center die 2, and the second arc half die 4 can approach each other to an abutting state, so as to bend the pipe fitting into a circular ring shape.

[0044] Specifically refer to Figure 8 , the locking mechanism 8 includes a fixed base 81, a hook-shaped plate 82, and a torsion spring 83. The fixed base 81 is fixed to the bottom of the frame top plate 11, and the hook-shaped plate 82 is rotatably connected to the fixed base 81 through a rotating shaft; in this embodiment, the hook-shaped plate 82 is partially provided with an abutting portion 822, and the outer wall of the abutting portion 822 is a plane; the torsion spring 83 is arranged between the hook-shaped plate 82 and the fixed base 81, and the torsion spring 83 can always generate an elastic force acting on the hook-shaped plate 82, thereby forcing the abutting portion 822 of the hook-shaped plate 82 to normally abut against the fixed base 81.

[0045] The hook-shaped plate 82 is partially provided with a hanging hook opening 821, and the opening of the hanging hook opening 821 faces upward; an extension column 251 is fixedly installed on the side of the sliding base 25. In the initial reset state, the extension column 251 is correspondingly located within the hanging hook opening 821. At this time, when the center die 2 is forced to move in the direction approaching the second arc half die 4, the extension column 251 can abut against the inner wall of the hanging hook opening 821, thereby restricting the movement of the center die 2. A guiding portion 823 is integrally formed on the side of the hook-shaped plate 82. In the initial reset state, the guiding portion 823 is in an inclined state.

[0046] At the same time refer to Figure 9A guide post 311 is provided on the side of the sliding block 31 near the other sliding block 31. The guide post 311 is vertically slidably mounted on the sliding block 31. A second spring 312 is provided between the guide post 311 and the sliding block 31. The second spring 312 can constantly generate an elastic force acting on the guide post 311, thereby forcing the guide post 311 to normally move upward to its limit position. During the first bending operation, the guide portion 823 is located in the movement path of the guide post 311. Since the guide post 311 is at its limit position of upward movement due to the elastic force of the second spring 312, the guide post 311, after contacting the guide portion 823, gradually forces the hook plate 82 to rotate downward, thereby allowing the extension post 251 to smoothly disengage from the hook opening 821, releasing the restraining effect on the extension post 251.

[0047] It is understood that after the bending operation is completed, the sliding base 25 automatically returns to its original position under the elastic force of the first spring 17. The extension post 251 can then abut the end of the hook plate 82, forcing the hook plate 82 to automatically rotate downward, thereby returning the extension post 251 to the hook opening 821. Furthermore, during the return movement of the first curved mold half 3, the guide post 311 can abut the side of the guide portion 823 closer to the second curved mold half 4. At this time, the guide post 311 can compress the second spring 312 and move downward, facilitating the smooth return of the first curved mold half 3 and facilitating the next bending operation.

[0048] Finally, it should be noted that after the first stage of bending operation is completed, the end of the pipe bent into a U shape may be tilted outward, making it difficult to smoothly enter the outer cavity 32 of the second arc-shaped half-mold 4; at this time, the operator can manually turn the operating handle 62, or use an auxiliary tool to knock the operating handle 62 to rotate it, and the cooperation of the first bevel gear 63 and the second bevel gear 64 can be used to rotate the center mold 2, and then the U-shaped pipe can be partially bent again, which helps the end of the U-shaped pipe to smoothly enter the outer cavity 32 of the second arc-shaped half-mold 4.

[0049] The above are preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pipe bender for processing basketball stands, comprising a frame assembly (1) and a bending assembly arranged on the surface of the frame assembly (1); characterized in that: The bending assembly includes a center die (2), a first arc-shaped half die (3), a second arc-shaped half die (4) and a driving mechanism (5). The first arc-shaped half die (3) and the second arc-shaped half die (4) are respectively located on two opposite sides of the center die (2), and an inner cavity (26) is provided on the outer peripheral side of the center die (2). Outer cavities (32) are provided on the inner arc surfaces of the first arc-shaped half die (3) and the second arc-shaped half die (4). The driving mechanism (5) is used to drive the first arc-shaped half die (3), the second arc-shaped half die (4) and the center die (2) to approach each other until they are in a butting state. At this time, a forming area adapted to the shape of the ball frame is jointly formed between the inner cavity (26) and the two outer cavities (32). Among them, the center die (2) includes a circular base (21), a plurality of moving inserts (22) slidably arranged on the surface of the circular base (21), and a pushing mechanism (23) for forcing each moving insert (22) to move outward. All the moving inserts (22) are arranged at intervals around the central axis of the circular base (21), and the moving direction of each moving insert (22) is the same as the radial direction of the circular base (21). A first concave arc (213) is provided on the upper edge of the circular base (21), and a second concave arc (222) is provided on the lower edge of each moving insert (22). In the bending operation state, the pushing mechanism (23) can force each moving insert (22) to move outward to the limit position. At this time, the first concave arc (213) and the second concave arcs (222) jointly enclose the inner cavity (26). The circular base (21) is also provided with a reset mechanism. When the pushing mechanism (23) disengages from the moving insert (22), the reset mechanism can force each moving insert (22) to move inward and gather together.

2. The pipe bender according to claim 1, wherein: The second arc-shaped half die (4) is fixedly arranged on the frame assembly (1). The first arc-shaped half die (3) and the center die (2) are both slidably arranged on the frame assembly (1), and a placement station (34) for placing pipe fittings is provided between the first arc-shaped half die (3) and the center die (2). A locking mechanism (8) is provided between the center die (2) and the frame assembly (1). The locking mechanism (8) is used to limit the movement of the center die (2) in the direction close to the second arc-shaped half die (4). The driving mechanism (5) is arranged between the first arc-shaped half die (3) and the frame assembly (1). In the first-stage bending operation, the driving mechanism (5) forces the first arc-shaped half die (3) to approach the center die (2). At this time, the center die (2) is positioned by the locking mechanism (8). In the second-stage bending operation, when the first arc-shaped half die (3) abuts against the center die (2), the locking mechanism (8) is forced to unlock. At this time, the first arc-shaped half die (3) pushes the center die (2) to move in the direction close to the second arc-shaped half die (4) to achieve the state where the first arc-shaped half die (3), the center die (2) and the second arc-shaped half die (4) approach each other until they are in a butting state.

3. The tube bender according to claim 2, characterized in that: A pillar portion (33) is convexly provided on the side of the first arc-shaped half mold (3) close to the second arc-shaped half mold (4). There are two pillar portions (33) which are respectively arranged on the two side edges of the first arc-shaped half mold (3), and the two pillar portions (33) together form a placement station (34); Two track plates (7) are fixedly arranged on the frame assembly (1), the two track plates (7) are respectively located on two opposite sides of the placement station (34), and the distance between the two track plates (7) matches the axial length of the pipe fitting.

4. The pipe bender according to claim 2, wherein: A sliding base (25) is fixed to the bottom of the central mold (2), and the central mold (2) is slidably connected to the frame assembly (1) through the sliding base (25); An extension column (251) is fixedly installed on the side of the sliding base (25); The locking mechanism (8) includes a fixed base (81), a hook-shaped plate (82) rotatably connected to the fixed base (81), and a torsion spring (83) arranged between the hook-shaped plate (82) and the fixed base (81). The hook-shaped plate (82) is provided with a hook opening (821) that cooperates with the extension column (251). During the first-stage bending operation, the extension column (251) and the hook opening (821) cooperate for limiting; The torsion spring (83) is used to force the abutting portion (822) to rotate towards the fixed base (81) in the normal state. At this time, the hook-shaped plate (82) is located on the moving path of the extension column (251), and when the central mold (2) moves back to its original position, the extension column (251) can abut against the hook-shaped plate (82) and force the hook-shaped plate (82) to rotate away from the fixed base (81).

5. The pipe bender according to claim 4, characterized in that: A guiding portion (823) is provided on the side of the hook-shaped plate (82), and the guiding portion (823) is inclined in the normal state; A guiding column (311) is arranged outside the first arc-shaped half mold (3). The guiding column (311) is arranged opposite to the guiding portion (823) along the moving direction of the first arc-shaped half mold (3). After the first-stage bending operation, the guiding column (311) can abut against the guiding portion (823) and force the hook-shaped plate (82) to rotate away from the fixed base (81) to enable the extension column (251) to smoothly disengage from the hook opening (821).

6. The pipe bender according to claim 2, wherein: The pushing mechanism (23) includes a central shaft (231), a pushing seat (232), and a base plate (233). The central shaft (231) is movably inserted through the circular base (21) and is coaxial with the circular base (21). The pushing seat (232) is fixedly connected to the top of the central shaft (231) and is located above the circular base (21). The base plate (233) is fixedly connected to the bottom of the central shaft (231) and is located below the circular base (21); A linear driving member (234) is provided between the base plate (233) and the circular base (21). When the linear driving member (234) acts, the pushing seat (232) enters among the respective movable inserts (22) and forces the respective movable inserts (22) to move outwards.

7. The tube bender according to claim 6, characterized in that: A rotating base (24) is fixed to the bottom of the circular base (21). A sliding base (25) is rotatably sleeved on the outer peripheral side of the rotating base (24). The central mold (2) is slidably connected to the frame assembly (1) through the sliding base (25). The fixed end of the linear driving member (234) is fixed to the rotating base (24) to realize the circumferential linkage between the linear driving member (234) and the circular base (21). A plurality of linkage parts (235) are arranged on the outer peripheral side of the pushing base (232). When the linear driving member (234) acts, the linkage parts (235) are matched and clamped in the area between two adjacent moving inserts (22) to realize the circumferential linkage between the pushing base (232) and the circular base (21). An operating mechanism (6) for forcing the circular base (21) to rotate is also mounted at the bottom of the frame assembly (1).

8. The tube bender according to claim 7, wherein: The operating mechanism (6) includes a sliding support (61) slidably mounted on the frame assembly (1), an operating handle (62) rotatably mounted on the sliding support (61), a first bevel gear (63) fixedly connected to the end of the operating handle (62), and a second bevel gear (64) fixed to the bottom of the base plate (233). The sliding support (61) is connected to the sliding base (25). When the driving mechanism (5) acts, the second bevel gear (64) moves towards the first bevel gear (63) and finally meshes with the first bevel gear (63) for transmission.

9. The pipe bender according to claim 2, characterized in that: The second arc-shaped half mold (4) includes two mirror-image forming mold bases (41). An inner groove (42) is provided on the inner arc side of each forming mold base (41). Wherein, the forming mold base (41) is slidably connected to the frame assembly (1). The moving directions of the two forming mold bases (41) are arranged at an angle. When the central mold (2) abuts against the two forming mold bases (41) and forces the two forming mold bases (41) to move, the two forming mold bases (41) can approach each other to an abutting state. At this time, the two inner grooves (42) jointly form the outer cavity (32).

10. The pipe bender according to claim 1, characterized in that: A plurality of wedge-shaped chutes (211) are provided on the surface of the circular base (21). The extending direction of the wedge-shaped chutes (211) is the same as the radial direction of the circular base (21). A wedge-shaped slider (221) is provided at the bottom of each moving insert (22). The wedge-shaped slider (221) is slidably mounted inside the wedge-shaped chute (211). The reset mechanism includes a limit disk (27) and a magnetic attraction assembly (28). The limit disk (27) is fixed to the surface of the circular base (21) and is located inside each wedge-shaped chute (211). The number of the magnetic attraction assemblies (28) matches the number of the wedge-shaped sliders (221). Each magnetic attraction assembly (28) includes a first magnet (281) fixedly embedded in the wedge-shaped slider (221) and a second magnet (282) fixedly embedded in the limit disk (27). The magnetic poles of the first magnet (281) and the second magnet (282) are opposite to each other.

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