Steel bar bender

Abstract

The utility model relates to the technical field of steel bar machining, and discloses a steel bar bender. The steel bar bender comprises a mold ejection mechanism, a mold conversion mechanism, a walking mechanism, a steel bar bending mechanism and a steel bar ejection mechanism, wherein the mold ejection mechanism is used for ejecting a steel bar bending mold; the die switching mechanism is used for switching a steel bar bending die; the walking mechanism can drive the whole steel bar bending machine to walk to the steel bar bending die storage bin mechanism so that the die switching mechanism can replace steel bar bending dies. The steel bar bending mechanism is used for bending and forming the steel bar clamped by the steel bar bending mold; and the steel bar ejection mechanism is used for ejecting the bent and formed steel bars. The steel bar bending machine can be suitable for steel bar bending operation with different steel bar diameters or different bending radiuses, and is high in machining efficiency, low in machining cost and small in occupied space.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing technology, and in particular to a steel bar bending machine. Background Technology

[0002] A rebar bending machine is a type of rebar processing machinery used in construction projects to bend rebar. It can quickly and accurately bend rebar of various diameters, offering high production efficiency and precise bending angle control. With its high efficiency, precision, multi-functionality, and cost-saving features, the rebar bending machine plays a vital role in construction and is an indispensable piece of equipment in modern building construction.

[0003] As the types of rebar bending increase, different types of rebar bending machines have emerged. However, different rebar diameters require several machines, resulting in low processing efficiency, high processing costs, and a large space occupation by several different types of rebar bending machines, which wastes space resources. Utility Model Content

[0004] Based on the above problems, the purpose of this utility model is to provide a rebar bending machine that is suitable for rebar bending operations with different rebar diameters or different bending radii, with high processing efficiency, low processing cost, and small space occupation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Rebar bending machine, including:

[0007] The mold ejection mechanism is used to eject the steel bar bending mold;

[0008] A mold conversion mechanism is used to convert the steel bar bending mold;

[0009] The walking mechanism can drive the entire rebar bending machine to the rebar bending mold storage bin mechanism, so that the mold conversion mechanism can change the rebar bending mold.

[0010] A rebar bending mechanism is used to bend and shape the rebar held in the rebar bending mold.

[0011] A rebar ejection mechanism is used to eject bent and shaped rebars.

[0012] As an optional embodiment of the rebar bending machine of this utility model, the walking mechanism includes a bending walking support plate, a first support plate, a second support plate, heavy-duty rollers, anti-collision screws, an anti-collision shaft, a bending center steering fixing seat, a positioning block, a lubrication block, a lubrication mounting plate, a motor reducer, a motor mounting seat, a gear sleeve, a drive gear, a gear cover, roller bearings, and a walking shaft. The first support plate and the second support plate are both fixed to the bending walking support plate, and multiple heavy-duty rollers are respectively fixed to the first support plate and the second support plate. The anti-collision screws are fixed to the anti-collision shaft, and the anti-collision shaft is fixed to the bending walking support plate. The bending center steering fixing seat is fixed to the bending travel support plate; the positioning block is fixed to the bending travel support plate; the lubrication block is installed on the lubrication mounting plate, and the lubrication mounting plate is installed on the bending travel support plate; the motor reducer is fixed on the motor mounting base; the gear spacer passes through the motor reducer; the drive gear passes through the motor reducer; the gear cover passes through the motor reducer and is concentrically connected; the roller bearing is installed on the travel shaft, and the roller bearing is axially fixed by a first shaft elastic retaining ring; the travel shaft is fixed to the bending travel support plate by a flat washer and a first nut.

[0013] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes a first dustproof sealing ring, an upper central mold top shaft, a first plastic bearing, a second plastic bearing, a third plastic bearing, a lower central mold top shaft, an upper rebar top shaft, a lower rebar top shaft, a bending central mold fixing shaft, a second dustproof sealing ring, and a first bearing. The first dustproof sealing ring is installed on the upper central mold top shaft; two first plastic bearings are installed on the upper central mold top shaft; the third plastic bearing is installed on the lower central mold top shaft; the upper central mold top shaft and the lower central mold top shaft are connected together; the upper rebar top shaft and the lower rebar top shaft are connected together; the upper rebar top shaft and the lower rebar top shaft pass through the upper central mold top shaft and the lower central mold top shaft; the second plastic bearing is fixed on the bending central mold fixing shaft; the second dustproof sealing ring is installed on the bending central mold fixing shaft; the upper central mold top shaft and the lower central mold top shaft pass concentrically through the bending central mold fixing shaft; the first bearing is installed on the bending central mold fixing shaft.

[0014] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes a star-shaped ring, a star-shaped sealing ring copper sleeve, a mold rotating sleeve, an O-ring, a gearbox center sleeve, a second bearing, a gearbox lower fixed plate, a large synchronous pulley, a flange, a bending gearbox, a first skeleton oil seal, and a second skeleton oil seal. The star-shaped ring is mounted on the star-shaped sealing ring copper sleeve; the star-shaped ring is also mounted on the bending center mold fixed shaft; the star-shaped ring is also mounted on the mold rotating sleeve; the O-ring is mounted on the gearbox center sleeve; the mold rotating sleeve and the bending center mold fixed shaft are concentrically mounted together; the second bearing is fixed on the gearbox lower fixed plate; the large synchronous pulley is connected to the flange; the flange is mounted to the bending gearbox through an oil seal spacer; the first skeleton oil seal is mounted on the gearbox lower fixed plate; the second skeleton oil seal is mounted on the oil seal spacer; and the gearbox center sleeve is fixed on the bending gearbox.

[0015] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes an upper fixed plate of the gearbox, a bending center rotating shaft, a left support sheet metal, a right support sheet metal, a bending center rebar support sheet metal, a bending center turntable, a bending drag chain box transition plate, a first bending drag chain box, a second bending drag chain box, a bending air pipe transition plate, and an L-shaped two-way valve. The upper fixed plate of the gearbox is connected to the lower fixed plate of the gearbox through the bending gearbox; the bending center rotating shaft is fixed on the bending gearbox; the bending center mold fixing shaft and the mold rotating sleeve are concentrically mounted on the bending center rotating shaft; the left support sheet metal and the right support sheet metal are jointly mounted on the lower fixed plate of the gearbox. On the fixed plate; the bending center steel bar support sheet metal is installed together with the left side support sheet metal and the right side support sheet metal; the bending center turntable is connected to the bending center rotating shaft and axially positions the bending center mold fixing shaft and the mold rotating sleeve; the steel bar bending mold is placed on the bending center mold fixing shaft; the bending cable chain box transition plate is fixed on the gearbox upper fixed plate; the first bending cable chain box and the second bending cable chain box are connected together; the bending cable chain box transition plate is connected to the first bending cable chain box; the bending air pipe transition plate is installed on the bending center rotating shaft; multiple L-shaped two-way valves are installed on the bending air pipe transition plate.

[0016] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes a motor fixing plate, a bending mechanism base, a bending motor, a first spacer, a small synchronous pulley, a tensioning connecting sleeve, a synchronous belt structure, a synchronous pulley cover, and a floating joint. The mold ejection mechanism includes a mold ejection cylinder, a cylinder connecting shaft, an adjustable joint, a cylinder mounting plate, a flanged bearing, and a cap. The motor fixing plate is fixed on the bending mechanism base; the bending mechanism base is connected to the bending center steering fixing seat; the bending motor is mounted on the motor fixing plate; the first spacer passes through the bending motor; the small synchronous pulley and... The tensioning connecting sleeve is integrally connected to the bending motor; the synchronous belt structure connects the small synchronous pulley and the large synchronous pulley; the synchronous pulley guard is mounted on the motor fixing plate; the floating joint is connected to the mold ejection cylinder; the cylinder connecting shaft is connected to the mold ejection cylinder; the adjustable joint is inserted into the floating joint; the mold ejection cylinder is fixed on the cylinder mounting plate; the flanged bearing is mounted on the cylinder mounting plate; the end cap is fixed on the cylinder mounting plate; the gearbox lower fixing plate is connected to the bending mechanism base.

[0017] As an optional embodiment of the rebar bending machine of this utility model, the rebar ejection mechanism includes a push shaft, a lower push plate, a rebar ejection cylinder, a long connecting shaft, a cylinder mounting seat, a support fixing shaft, a push guide shaft, an upper push plate, a linear bearing, a bearing fixing seat, and a second shaft elastic retaining ring. The push shaft is connected to the lower push plate; the push shaft passes through the cylinder mounting plate and is connected to the adjustable joint; the rebar ejection cylinder is connected to the lower push plate; the lower end rebar push shaft is connected to the rebar ejection cylinder; the long connecting shaft is connected to the cylinder mounting plate and the bending mechanism base; the cylinder mounting seat is connected to the bending mechanism base and the cylinder mounting plate; the two support fixing shafts and the push guide shaft together connect the lower push plate and the upper push plate; the linear bearing is installed in the bearing fixing seat; the second shaft elastic retaining ring is locked in the bearing fixing seat to prevent the linear bearing from axially moving.

[0018] As an optional embodiment of the rebar bending machine of this utility model, the mold conversion mechanism includes a cylinder fixing frame, a flange bearing, a mold conversion cylinder, and a conical fixing block. The cylinder fixing frame is installed on the cylinder mounting base; the flange bearing is inserted into the mold conversion cylinder; the flange bearing is connected to the cylinder fixing frame; the conical fixing block is fixed on the upper push plate; the lower central mold top shaft is connected to the conical fixing block through a large flat washer and a second nut.

[0019] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes a first edge-rolling copper sleeve, a small bending shaft upper sleeve, a small bending shaft mandrel, a small bending shaft pressure cap, a small bending shaft lower sleeve, a first internal hexagonal cone end set screw, a first bending cylinder transition mounting plate, a first bending shaft ejection cylinder, and a first bending cylinder connector. The first edge-rolling copper sleeve is mounted on the small bending shaft upper sleeve; the small bending shaft mandrel is concentrically mounted on the first edge-rolling copper sleeve; the small bending shaft pressure cap is mounted on the small bending shaft upper sleeve; the small bending shaft mandrel is concentrically mounted on the small bending shaft lower sleeve; the first internal hexagonal cone end set screw is mounted on the small bending shaft lower sleeve for locking the small bending shaft mandrel; the first bending cylinder transition mounting plate is mounted on the first bending shaft ejection cylinder; the first bending cylinder connector is mounted on the first bending shaft ejection cylinder; and the first bending cylinder connector is inserted into the small bending shaft lower sleeve.

[0020] As an optional embodiment of the rebar bending machine of this utility model, the rebar bending mechanism includes a second edge-rolling copper sleeve, a third edge-rolling copper sleeve, an upper sleeve of a large bending shaft, a large bending shaft spindle, a large bending shaft pressure cap, a lower sleeve of a large bending shaft, a second internal hexagonal cone-shaped set screw, a second bending cylinder transition mounting plate, a second bending shaft ejection cylinder, and a second bending cylinder connector. The second edge-rolling copper sleeve and the third edge-rolling copper sleeve are jointly mounted on the upper sleeve of the large bending shaft; the large bending shaft spindle is concentrically mounted on the second edge-rolling copper sleeve and the third edge-rolling copper sleeve; the large bending shaft pressure cap is mounted on the upper sleeve of the large bending shaft; the large bending shaft spindle is concentrically mounted on the lower sleeve of the large bending shaft; the second internal hexagonal cone-shaped set screw is mounted on the lower sleeve of the large bending shaft for locking the large bending shaft spindle; the second bending cylinder transition mounting plate is mounted on the second bending shaft ejection cylinder; the second bending cylinder connector is mounted on the second bending shaft ejection cylinder; and the second bending cylinder connector is inserted into the lower sleeve of the large bending shaft.

[0021] The beneficial effects of this utility model are as follows:

[0022] The rebar bending machine provided by this utility model bends and shapes the rebar held in the rebar bending mold through the rebar bending mechanism, and ejects the bent rebar through the rebar ejection mechanism. When bending rebars with different diameters or different bending radii, it is necessary to change the rebar bending mold. The walking mechanism drives the entire rebar bending machine to the rebar bending mold storage bin mechanism, ejects the rebar bending mold through the mold ejection mechanism, and changes the rebar bending mold through the mold conversion mechanism. The rebar bending mold can be changed quickly, saving time and effort. This rebar bending machine can be used for rebar bending operations with different rebar diameters or different bending radii, with high processing efficiency, low processing cost, and small space occupation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the walking mechanism provided in a specific embodiment of the present invention from a first-view perspective;

[0025] Figure 2 This is a schematic diagram of the walking mechanism provided in a specific embodiment of the present invention from a second perspective.

[0026] Figure 3 This is a cross-sectional schematic diagram of the walking mechanism provided in a specific embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the walking mechanism provided in a specific embodiment of the present invention from a third-person perspective;

[0028] Figure 5 This is a structural schematic diagram of the steel bar bending mechanism provided in a specific embodiment of this utility model from a fourth-person perspective;

[0029] Figure 6 This is a cross-sectional schematic diagram of the steel bar bending mechanism provided in a specific embodiment of this utility model from a fifth perspective;

[0030] Figure 7 This is a cross-sectional schematic diagram of the steel bar bending mechanism provided in a specific embodiment of this utility model from a sixth perspective.

[0031] Figure 8 This is a structural schematic diagram of the rebar ejection mechanism and mold ejection mechanism provided in a specific embodiment of this utility model from a seventh perspective.

[0032] Figure 9 This is a schematic diagram of the mold conversion mechanism provided in a specific embodiment of the present invention from an eighth-person perspective.

[0033] Figure 10 This is a schematic diagram of the mold conversion mechanism provided in a specific embodiment of the present invention from a ninth-person perspective.

[0034] Figure 11 This is a structural schematic diagram of the steel bar bending mechanism provided in a specific embodiment of this utility model from a tenth-angle perspective;

[0035] Figure 12This is a structural schematic diagram of the rebar ejection mechanism provided in a specific embodiment of the present invention from the eleventh perspective.

[0036] Figure 13 This is a structural schematic diagram of the steel bar bending mechanism provided in a specific embodiment of the present invention from the twelfth perspective.

[0037] Figure 14 This is a structural schematic diagram of the rebar bending machine provided in a specific embodiment of the present invention from a thirteenth-angle perspective;

[0038] Figure 15 This is a structural schematic diagram of the rebar bending machine provided in a specific embodiment of the present invention from the fourteenth perspective.

[0039] Figure 16 This is a cross-sectional schematic diagram of the steel bar bending mechanism provided in a specific embodiment of this utility model;

[0040] Figure 17 This is a schematic diagram of the structure of the small bending shaft provided in a specific embodiment of the present invention;

[0041] Figure 18 This is a cross-sectional schematic diagram of a small bending shaft provided in a specific embodiment of this utility model;

[0042] Figure 19 This is a schematic diagram of the structure of the large bending shaft provided in a specific embodiment of the present utility model;

[0043] Figure 20 This is a cross-sectional schematic diagram of a large bending shaft provided in a specific embodiment of this utility model;

[0044] Figure 21 This is a structural schematic diagram of the rebar bending machine provided in a specific embodiment of the present invention from a fifteenth-angle perspective.

[0045] In the picture:

[0046] 1. First support plate; 2. Bending and walking support plate; 3. Motor mounting base; 4. Anti-collision screw; 5. Heavy-duty roller; 6. Second support plate; 7. Bending center steering fixing base; 8. Anti-collision shaft; 9. Positioning block; 10. Lubrication mounting plate; 11. Lubrication block; 12. Motor reducer; 13. Gear sleeve;

[0047] 14. Drive gear; 15. Roller bearing; 16. Flat washer; 17. Elastic retaining ring for the first shaft; 18. First nut; 19. Traveling shaft; 20. Gear cover; 21. Rebar bending die; 22. Bending center rebar support sheet metal; 23. Bending center rotating shaft; 24. Left side support sheet metal; 25. Right side support sheet metal; 26. First dustproof sealing ring; 27. Die rotating sleeve; 28. Star-shaped ring; 29. ​​Star-shaped sealing ring copper sleeve; 30. Bending center die fixing shaft; 31. Upper center die top shaft; 32. O-ring; 33. Oil seal spacer; 34. First skeleton oil seal; 35. First plastic bearing; 36. Second dustproof sealing ring; 37. Second plastic bearing; 38. First bearing; 39. Upper end 40. Lower Rebar Top Shaft; 41. Gearbox Center Sleeve; 42. Lower Center Mold Top Shaft; 43. Second Bearing; 44. Second Skeleton Oil Seal; 45. Third Plastic Bearing; 46. Bending Center Turntable; 47. L-shaped T-junction; 48. Bending Air Pipe Transition Plate; 49. First Bending Cable Carrier Box; 50. Second Bending Cable Carrier Box; 51. Bending Cable Carrier Box Transition Plate; 52. Gearbox Upper Fixing Plate; 53. Bending Gearbox; 54. Gearbox Lower Fixing Plate; 55. Rebar Ejection Cylinder; 56. Long Connecting Shaft; 57. Lower Push Plate; 58. Cylinder Mounting Plate; 59. Socket Head Screw; 60. Push Shaft; 61. Adjustable Joint; 62. Cylinder Connecting Shaft; 63. Mold Ejection Cylinder; 64. 65. Cylinder mounting base; 66. Mold conversion cylinder; 67. Flange seat bearing; 68. Bending motor; 69. Cylinder fixing bracket; 70. Push plate assembly; 71. Conical fixing block; 72. Motor fixing plate; 73. First spacer; 74. Upper push plate; 75. Support fixing shaft; 76. Elastic retaining ring for second shaft; 77. Bearing fixing seat; 78. Linear bearing; 79. Push guide shaft; 80. Bearing with flange; 81. End cap; 82. Floating joint; 83. Bending mechanism base; 84. Large synchronous pulley; 85. Side flange; 86. Synchronous pulley guard; 87. Tensioning connecting sleeve; 88. Small synchronous pulley; 89. Synchronous belt structure; 90. Small bending shaft assembly structure; 91. Large bending shaft assembly structure; Upper part of the bending machine; 92. Large flat washer; 93. Second nut; 94. Lower part of the bending machine; 95. Small bending shaft upper sleeve; 96. Small bending shaft lower sleeve; 97. First internal hexagonal cone end set screw; 98. First bending cylinder transition mounting plate; 99. First bending shaft ejector cylinder; 100. Small bending shaft gland; 101. First rolled edge copper sleeve; 102. Small bending shaft spindle; 103. First bending cylinder connector; 104. Large bending shaft upper sleeve; 105. Large bending shaft lower sleeve; 106. Second internal hexagonal cone end set screw; 107. Second bending cylinder transition mounting plate; 108. Second bending shaft ejector cylinder; 109. Large bending shaft gland; 110. Second rolled edge copper sleeve; 111. Large bending shaft spindle;

[0048] 112. Third rolled edge copper sleeve; 113. Second bent cylinder connector. Detailed Implementation

[0049] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first position" and "second position" refer to two different positions.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] like Figures 1 to 21As shown, this embodiment provides a rebar bending machine, which includes a mold ejection mechanism, a mold conversion mechanism, a traveling mechanism, a rebar bending mechanism, and a rebar ejection mechanism. The mold ejection mechanism is used to eject the rebar bending mold 21 to unlock it from the rebar bending machine, facilitating subsequent replacement of the rebar bending mold 21. The rebar bending mold 21 can be a mold with a self-locking function, which facilitates the automation of mold replacement. The mold conversion mechanism is used to convert the rebar bending mold 21. It can be understood that multiple rebar bending molds 21 are stored in a rebar bending mold storage bin mechanism. The traveling mechanism can drive the entire rebar bending machine to the rebar bending mold storage bin mechanism for the mold conversion mechanism to replace the rebar bending mold 21. The rebar bending mechanism is used to bend and shape the rebar held by the rebar bending mold 21. The rebar ejection mechanism is used to eject the bent and shaped rebar.

[0053] The steel bar bending machine bends the steel bar held in the steel bar bending mold 21 through the steel bar bending mechanism, and ejects the bent steel bar through the steel bar ejection mechanism. When bending steel bars with different diameters or different bending radii, the steel bar bending mold 21 needs to be replaced. The walking mechanism drives the entire steel bar bending machine to the steel bar bending mold storage bin mechanism, ejects the steel bar bending mold 21 through the mold ejection mechanism, and changes the steel bar bending mold 21 through the mold conversion mechanism. The steel bar bending mold 21 can be quickly changed, saving time and effort. This steel bar bending machine can be used for steel bar bending operations with different steel bar diameters or different bending radii. It has high processing efficiency, low processing cost, and small space occupation.

[0054] To facilitate the movement of the entire rebar bending machine to the rebar bending mold storage bin mechanism via the traveling mechanism, the traveling mechanism optionally includes a bending traveling support plate 2, a first support plate 1, a second support plate 6, heavy-duty rollers 5, anti-collision screws 4, an anti-collision shaft 8, a bending center steering fixing seat 7, a positioning block 9, a lubrication block 11, a lubrication mounting plate 10, a motor reducer 12, a motor mounting seat 3, a gear sleeve 13, a drive gear 14, a gear cover 20, roller bearings 15, and a traveling shaft 19. The bending traveling support plate 2 serves as the main support structure of the traveling mechanism. The first support plate 1 and the second support plate 6 are both fixed on the bending traveling support plate 2. Multiple heavy-duty rollers 5 are respectively fixed on the first support plate 1 and the second support plate 6, and the heavy-duty rollers 5 are used for rolling cooperation with the track. The anti-collision screws 4 are fixed on the anti-collision shaft 8, and the anti-collision shaft 8 is fixed on the bending traveling support plate 2 to provide anti-collision function for the traveling mechanism. The bending center steering fixing seat 7 is fixed on the bending traveling support plate 2. On the support plate 2, the bending center steering fixing seat 7 is fixedly connected to the rebar bending mechanism to provide support for the rebar bending mechanism; the positioning block 9 is fixed on the bending walking support plate 2 and is used to position the walking mechanism relative to the track; the lubrication block 11 is installed on the lubrication mounting plate 10, which is installed on the bending walking support plate 2. The lubrication block 11 can effectively reduce walking resistance and improve walking efficiency; the motor reducer 12 is fixed on the motor mounting seat 3. The motor reducer 12 is a drive motor with an integrated reducer; the gear sleeve 13 passes through the output shaft of the motor reducer 12; the drive gear 14 passes through the output shaft of the motor reducer 12; the gear cover 20 passes through the output shaft of the motor reducer 12 and is concentrically connected; the roller bearing 15 is installed on the walking shaft 19 and is axially fixed by the first shaft elastic retaining ring 17; the walking shaft 19 is fixed to the bending walking support plate 2 by the flat washer 16 and the first nut 18.

[0055] To facilitate the bending of reinforcing bars, the reinforcing bar bending mechanism optionally includes a first dustproof sealing ring 26, an upper central mold top shaft 31, a first plastic bearing 35, a second plastic bearing 37, a third plastic bearing 45, a lower central mold top shaft 42, an upper reinforcing bar top shaft 39, a lower reinforcing bar top shaft 40, a bending central mold fixing shaft 30, a second dustproof sealing ring 36, and a first bearing 38. The first dustproof sealing ring 26 is installed on the upper central mold top shaft 31 to provide a dustproof seal; the two first plastic bearings 35 are installed on the upper central mold top shaft 31 to effectively reduce the rotational resistance of the upper central mold top shaft 31; the third plastic bearing 45 is installed on the lower central mold top shaft 42 to effectively reduce the rotational resistance of the lower central mold top shaft 42; the upper central mold top shaft 31 and the lower central mold top shaft 39 are fixed shafts. The top shafts 42 of the central mold are connected together to facilitate the transmission of force; the top shafts 39 and 40 of the upper and lower reinforcing bars are connected together to facilitate the transmission of force; the top shafts 39 and 40 of the upper and lower reinforcing bars pass through the top shafts 31 and 42 of the upper and lower central molds, making the structure compact and space-saving; the second plastic bearing 37 is fixed on the fixed shaft 30 of the bending central mold, effectively reducing the rotational resistance of the fixed shaft 30 of the bending central mold; the second dustproof sealing ring 36 is installed on the fixed shaft 30 of the bending central mold, playing a dustproof sealing role; the top shafts 31 and 42 of the upper and lower central molds pass concentrically through the fixed shaft 30 of the bending central mold, making the structure compact and space-saving; the first bearing 38 is installed on the fixed shaft 30 of the bending central mold to reduce frictional resistance.

[0056] To facilitate mold rotation, the rebar bending mechanism optionally includes a star-shaped ring 28, a star-shaped sealing ring copper sleeve 29, a mold rotating sleeve 27, an O-ring 32, a gearbox center sleeve 41, a second bearing 43, a gearbox lower fixed plate 54, a large synchronous pulley 83, a flange 84, a bending gearbox 53, a first skeleton oil seal 34, and a second skeleton oil seal 44. The star-shaped ring 28 is mounted on the star-shaped sealing ring copper sleeve 29 to limit and fix the star-shaped sealing ring copper sleeve 29; the star-shaped ring 28 is also mounted on the bending center mold fixed shaft 30; the star-shaped ring 28 is also mounted on the mold rotating sleeve 27; and the O-ring 32 is mounted on the gearbox center sleeve. On 41, the gearbox center sleeve 41 is sealed; the mold rotating sleeve 27 is concentrically installed with the bending center mold fixing shaft 30, with a compact structure and small space occupation; the second bearing 43 is fixed on the gearbox lower fixing plate 54; the large synchronous pulley 83 is connected to the flange 84; the flange 84 is installed with the bent gearbox 53 through the oil seal spacer 33; the first skeleton oil seal 34 is installed on the gearbox lower fixing plate 54 to seal the gearbox lower fixing plate 54; the second skeleton oil seal 44 is installed on the oil seal spacer 33 to seal the oil seal spacer 33; the gearbox center sleeve 41 is fixed on the bent gearbox 53.

[0057] To facilitate bending of the reinforcing bars, the reinforcing bar bending mechanism optionally includes a gearbox upper fixed plate 52, a bending center rotating shaft 23, a left support sheet metal 24, a right support sheet metal 25, a bending center reinforcing bar support sheet metal 22, a bending center turntable 46, a bending cable chain box transition plate 51, a first bending cable chain box 49, a second bending cable chain box 50, a bending air pipe transition plate 48, and an L-shaped two-way valve 47. The gearbox upper fixed plate 52 is connected to the gearbox lower fixed plate 54 via a bending gearbox 53 to fix the bending gearbox 53. The bending center rotating shaft 23 is fixed on the bending gearbox 53, and the bending gearbox 53 drives the bending center rotating shaft 23 to rotate. The bending center mold fixing shaft 30 and the mold rotating sleeve 27 are concentrically installed on the bending center rotating shaft 23, resulting in a compact structure and small space occupation. The left support sheet metal 24 and the right support sheet metal 25 together... The bending center steel bar support sheet metal 22 is installed on the lower fixed plate 54 of the gearbox; the bending center steel bar support sheet metal 22 is installed together with the left support sheet metal 24 and the right support sheet metal 25, and the bending center steel bar support sheet metal 22 is supported by the left support sheet metal 24 and the right support sheet metal 25; the bending center turntable 46 is connected to the bending center rotating shaft 23 and axially positions the bending center mold fixing shaft 30 and the mold rotating sleeve 27; the steel bar bending mold 21 is placed on the bending center mold fixing shaft 30; the bending cable chain box transition plate 51 is fixed on the upper fixed plate 52 of the gearbox; the first bending cable chain box 49 is connected to the second bending cable chain box 50; the bending cable chain box transition plate 51 is connected to the first bending cable chain box 49; the bending air pipe transition plate 48 is installed on the bending center rotating shaft 23; multiple L-shaped two-way valves 47 are installed on the bending air pipe transition plate 48.

[0058] To ensure the bending degree of the reinforcing bars, optionally, the reinforcing bar bending mechanism includes a motor fixing plate 71, a bending mechanism base 82, a bending motor 67, a first spacer 72, a small synchronous pulley 87, a tensioning connecting sleeve 86, a synchronous belt structure 88, a synchronous pulley cover 85, and a floating joint 81. The mold ejection mechanism includes a mold ejection cylinder 63, a cylinder connecting shaft 62, an adjustable joint 61, a cylinder mounting plate 58, a flanged bearing 79, and a cap 80. The motor fixing plate 71 is fixed on the bending mechanism base 82; the bending mechanism base 82 is connected to the bending center steering fixing seat 7; the bending motor 67 is mounted on the motor fixing plate 71; the first spacer 72 passes through the bending motor 67; the small synchronous pulley 87 and the tensioning connecting sleeve 86 are integrally connected to the bending motor 67; the synchronous belt structure 88... 8. Connect the small synchronous pulley 87 and the large synchronous pulley 83 together, and drive the small synchronous pulley 87 and the large synchronous pulley 83 to rotate through the synchronous belt structure 88; the synchronous pulley guard 85 is installed on the motor fixing plate 71 to protect the small synchronous pulley 87 and the large synchronous pulley 83 from dust; the floating joint 81 is connected to the mold ejection cylinder 63 to reduce the installation accuracy requirements; the cylinder connecting shaft 62 is connected to the mold ejection cylinder 63, and the cylinder connecting shaft 62 is connected to the adjustable joint 61; the adjustable joint 61 and the floating joint 81 are inserted together; the mold ejection cylinder 63 is fixed on the cylinder mounting plate 58; the flange bearing 79 is installed on the cylinder mounting plate 58; the end cap 80 is fixed on the cylinder mounting plate 58; the gearbox lower fixing plate 54 is connected to the bending mechanism base 82.

[0059] To facilitate the ejection of the bent and shaped reinforcing bars, the reinforcing bar ejection mechanism may optionally include a push shaft 60, a lower push plate 57, a reinforcing bar ejection cylinder 55, a long connecting shaft 56, a cylinder mounting seat 64, a support fixing shaft 74, a push guide shaft 78, an upper push plate 73, a linear bearing 77, a bearing fixing seat 76, and a second shaft elastic retaining ring 75. The push shaft 60 is connected to the lower push plate 57; the push shaft 60 passes through the cylinder mounting plate 58 and is connected to an adjustable joint 61; the reinforcing bar ejection cylinder 55 is connected to the lower push plate 57. The lower rebar top shaft 40 is connected to the rebar ejection cylinder 55; the long connecting shaft 56 is connected to the cylinder mounting plate 58 and the bending mechanism base 82; the cylinder mounting seat 64 is connected to the bending mechanism base 82 and the cylinder mounting plate 58; two supporting fixed shafts 74 and the push guide shaft 78 together connect the lower push plate 57 and the upper push plate 73; the linear bearing 77 is installed in the bearing fixing seat 76; the second shaft is secured in the bearing fixing seat 76 with an elastic retaining ring 75 to prevent the linear bearing 77 from axially moving. The long connecting shaft 56 and the cylinder mounting plate 58 can be fixedly connected by hexagon socket head cap screws 59. The lower push plate 57 and the upper push plate 73 together form the push plate assembly 69.

[0060] To facilitate mold replacement, the mold conversion mechanism optionally includes a cylinder mounting bracket 68, a flange bearing 66, a mold conversion cylinder 65, and a tapered fixing block 70. The cylinder mounting bracket 68 is mounted on a cylinder mounting base 64; the flange bearing 66 is inserted into the mold conversion cylinder 65; the flange bearing 66 is connected to the cylinder mounting bracket 68; the tapered fixing block 70 is fixed on the upper push plate 73; the lower center mold top shaft 42 is connected to the tapered fixing block 70 through a large flat washer 92 and a second nut 93.

[0061] To facilitate bending operations of smaller diameter reinforcing bars, the reinforcing bar bending mechanism optionally includes a first edge-curling copper sleeve 101, a small bending shaft upper sleeve 95, a small bending shaft mandrel 102, a small bending shaft gland 100, a small bending shaft lower sleeve 96, a first internal hexagonal cone end set screw 97, a first bending cylinder transition mounting plate 98, a first bending shaft ejection cylinder 99, and a first bending cylinder connector 103. The first edge-curling copper sleeve 101 is mounted on the small bending shaft upper sleeve 95; the small bending shaft mandrel 102 is concentrically mounted on the first edge-curling copper sleeve 101. This design is compact and occupies minimal space. The space is small; the small bending shaft cover 100 is installed on the small bending shaft upper sleeve 95; the small bending shaft spindle 102 is concentrically installed on the small bending shaft lower sleeve 96, the structure is compact and occupies little space; the first internal hexagonal cone end set screw 97 is installed on the small bending shaft lower sleeve 96 to lock the small bending shaft spindle 102; the first bending cylinder transition mounting plate 98 is installed on the first bending shaft ejection cylinder 99; the first bending cylinder connector 103 is installed on the first bending shaft ejection cylinder 99; the first bending cylinder connector 103 is inserted into the small bending shaft lower sleeve 96.

[0062] To facilitate bending operations of large-diameter reinforcing bars, the reinforcing bar bending mechanism optionally includes a second edge-curling copper sleeve 110, a third edge-curling copper sleeve 112, a large bending shaft upper sleeve 104, a large bending shaft mandrel 111, a large bending shaft gland 109, a large bending shaft lower sleeve 105, a second hexagonal cone end set screw 106, a second bending cylinder transition mounting plate 107, a second bending shaft ejection cylinder 108, and a second bending cylinder connector 113. The second edge-curling copper sleeve 110 and the third edge-curling copper sleeve 112 are jointly mounted on the large bending shaft upper sleeve 104; the large bending shaft mandrel 111 is concentrically mounted on the second edge-curling copper sleeve 110 and the third edge-curling copper sleeve 112. The rolled-edge copper sleeve 112 has a compact structure and occupies little space; the large bending shaft cover 109 is installed on the large bending shaft upper sleeve 104; the large bending shaft mandrel 111 is concentrically installed on the large bending shaft lower sleeve 105, which has a compact structure and occupies little space; the second internal hexagonal cone end set screw 106 is installed on the large bending shaft lower sleeve 105 to lock the large bending shaft mandrel 111; the second bending cylinder transition mounting plate 107 is installed on the second bending shaft ejection cylinder 108; the second bending cylinder connector 113 is installed on the second bending shaft ejection cylinder 108; the second bending cylinder connector 113 is inserted into the large bending shaft lower sleeve 105.

[0063] The small bending shaft assembly structure 89 and the three sets of large bending shaft assembly structures 90 are both installed on the bending center rotating shaft 23 to meet the requirements of different steel bar diameters and bending radii. When bending steel bars of different diameters, the structure can be automatically adjusted and switched, eliminating the need for manual replacement, resulting in high processing efficiency, low cost, and high response speed. The gearbox lower fixed plate 54 is connected to the bending mechanism base 82, which in turn connects the upper part 91 and the lower part 94 of the bending machine together, resulting in a compact overall structure.

[0064] According to production requirements, the motor reducer 12 is energized and moves to the steel bar bending die storage hopper mechanism for die replacement. Die replacement steps are as follows:

[0065] Step 1: According to the known records of the system, the motor reducer 12 travels to the position of the empty hopper in the steel bar bending mold storage hopper mechanism;

[0066] Step 2: The cylinder 63 ejects the steel bar bending mold 21.

[0067] Step 3: The cylinder diameter of the mold conversion cylinder 65 is pushed out to unlock the steel bar bending mold 21;

[0068] Step 4: The cylinder on the rebar bending die storage bin mechanism retracts. At this time, the die has entered the storage bin. The die ejection cylinder 63 retracts, and the cylinder on the rebar bending die storage bin mechanism extends to retrieve the die and record the position.

[0069] Step 5: Based on the known customer requirements for bending cylinder diameter, the motor reducer 12 travels to the corresponding mold in the steel bar bending mold storage bin mechanism;

[0070] Step 6: The cylinder on the rebar bending mold storage hopper mechanism retracts, and the mold ejection cylinder 63 cylinder diameter ejects.

[0071] Step 7: The cylinder on the rebar bending die storage bin mechanism extends, the die ejection cylinder 63 retracts, and the die conversion cylinder 65 retracts to lock the rebar bending die 21.

[0072] Step 8: Complete the mold replacement.

[0073] After the mold is changed, the two rebar bending machines move to the corresponding positions to bend the rebar according to the length determined by the customer. At the same time, the rebar bending support clamping mechanism moves to the middle of the two rebar bending machines to clamp the rebar.

[0074] The rebar bending die storage hopper mechanism may include a mounting base, a clamping assembly, a drive assembly, and a guide assembly. The clamping assembly is movably connected to the mounting base via the guide assembly and is configured to clamp the die, limiting the die's position within the clamping assembly to be parallel to the die mounting surface. The drive assembly is connected to the clamping assembly and is configured to provide movement power to the clamping assembly. The die feeding mechanism and the rebar bending machine including the die feeding mechanism utilize the guide assembly to guide the travel path of the clamping assembly holding the die, enabling the clamping assembly to complete two strokes in different directions under the action of a set of drive assemblies. This simplifies the die feeding mechanism and the rebar bending machine, reducing manufacturing costs.

[0075] The rebar bending support clamping mechanism may include a mounting base, a fixed clamping block, a movable clamping block, and a clamping drive assembly. The fixed clamping block is fixed to the mounting base. The movable clamping block is slidably disposed on the mounting base along a first direction, forming a clamping space between the movable clamping block and the fixed clamping block. The clamping drive assembly includes a swing arm, a support rod, and a clamping drive component. The support rod is hinged to the mounting base, the swing arm is hinged to the support rod, and the first end of the swing arm is hinged to the movable clamping block, the second end of the swing arm is hinged to the clamping drive component, and the clamping drive component is hinged to the mounting base. The swing arm is a force-saving lever that can provide a greater clamping force to the movable clamping block, thereby effectively clamping the workpiece in the clamping space. Depending on the bending requirements of the rebar, one or two rebar bending machines can be set. Taking two rebar bending machines as an example, the two rebar bending machines are located on opposite sides of the rebar bending support clamping mechanism, and based on the guide rail setting, both rebar bending machines are slidably disposed on the guide rail to adjust the bending position according to the length of the rebar. The rebar bending support clamping mechanism clamps the rebar when the rebar bending machine bends the rebar to prevent it from falling off.

[0076] The rebar bending die 21 may include a base, a locking assembly, and a bending assembly. The base is provided with a locking groove, a first receiving groove, and a second receiving groove. The locking groove is used to pass through the bending center die fixing shaft 30. The locking assembly includes a first locking member, a first elastic member, a second locking member, and a second elastic member. The first elastic member is disposed in the first receiving groove, and the first locking member abuts against the first elastic member. The second elastic member is disposed in the second receiving groove, and the second locking member abuts against the second elastic member. The first locking member and the second locking member are used to clamp the bending center die fixing shaft 30. The bending center die fixing shaft 30 can be rotated to open the first locking member and the second locking member, so that the bending center die fixing shaft 30 can be disengaged from the locking groove. The bending assembly includes a first bending die block and a second bending die block spaced apart on the base. The first bending die block and the second bending die block have a corresponding relationship with the base. The size of the first bending die block and the second bending die block and their position relative to the base are set according to the bending radius required for the rebar.

[0077] The specific process of locking and unlocking the rebar bending die 21 can be as follows: The top of the bending center die fixing shaft 30 is provided with multiple circumferentially distributed first protrusions, and a first groove is formed between adjacent first protrusions. A second protrusion is provided in the locking groove, and a second groove is formed between adjacent second protrusions. When the bending center die fixing shaft 30 passes through the locking groove of the base, the first protrusion aligns with and penetrates the second groove. When the first protrusion is fully inserted into the locking groove, it will push open the first locking member and the second locking member, compressing the first elastic member and the second elastic member. At this time, the bending center die fixing shaft 30 rotates forward under the driving force, causing the first protrusion and the second protrusion to align and lock, thus axially limiting and locking the bending center die fixing shaft 30, preventing the bending center die fixing shaft 30 from axially disengaging from the locking groove. Simultaneously, the first locking member and the second locking member are respectively engaged in the first groove between adjacent first protrusions on the top of the bending center die fixing shaft 30 by the elastic force of the first elastic member and the second elastic member. The fixing member and the second locking member clamp the bending center mold fixing shaft 30, which extends into the locking groove, under the elastic force of the first elastic member and the second elastic member, respectively. This makes the bending center mold fixing shaft 30 circumferentially limited and locked. When there is no external force, the bending center mold fixing shaft 30 cannot rotate freely, thus locking the rebar bending mold 21 with the rebar bending machine. The bending center mold fixing shaft 30 can rotate in the opposite direction under the driving force, so that the first protrusion at the top of the bending center mold fixing shaft 30 pushes open the first locking member and the second locking member, overcoming the elastic force of the first elastic member and the second elastic member. Then, the first protrusion of the bending center mold fixing shaft 30 is misaligned with the second protrusion of the locking groove, without interference, so that the first protrusion can pass through the second groove, and the bending center mold fixing shaft 30 can disengage from the locking groove, thus unlocking the rebar bending mold 21 from the rebar bending machine. This realizes the automatic locking function of the rebar bending mold 21, which facilitates the automation of mold switching, reduces labor costs, and reduces the time required for mold switching.

[0078] The rebar bending mechanism is equipped with a small bending shaft assembly structure 89 and multiple sets of large bending shaft assembly structures 90. It automatically selects the corresponding bending shaft according to different rebar diameters. After selection, the bending motor 67 starts, driving the small synchronous pulley 87 and the large synchronous pulley 83 to rotate, thereby driving the bending center shaft 23 to rotate, so that the rebar is bent into the desired shape.

[0079] When a steel bar bending operation is completed, the steel bar ejection cylinder 55 and the cylinder in the steel bar bending support clamping mechanism extend simultaneously to eject the steel bar.

[0080] The rebar bending mechanism is also equipped with bending limit, hard limit, soft limit and origin point.

[0081] Air circuit layout of the steel bar bending mechanism: Due to the setting of small bending shaft assembly structure 89 and multiple sets of large bending shaft assembly structures 90, a lot of air pipes are used. An intermediate transition air pipe is designed through the bending air pipe transition plate 48. The forward and reverse drag chain is placed in the first bending drag chain box 49 and the second bending drag chain box 50, so that the air pipe enters the forward and reverse drag chain and is transmitted to the main air circuit.

[0082] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rebar bending machine, characterized in that, include: The mold ejection mechanism is used to eject the steel bar bending mold (21); A mold conversion mechanism is used to convert the steel bar bending mold (21); The walking mechanism can drive the entire rebar bending machine to the rebar bending mold storage bin mechanism, so that the mold conversion mechanism can replace the rebar bending mold (21). A rebar bending mechanism is used to bend and shape the rebar held in the rebar bending mold (21); A rebar ejection mechanism is used to eject bent and shaped rebars.

2. The rebar bending machine according to claim 1, characterized in that, The walking mechanism includes a bending walking support plate (2), a first support plate (1), a second support plate (6), heavy-duty rollers (5), anti-collision screws (4), an anti-collision shaft (8), a bending center steering fixing seat (7), a positioning block (9), a lubrication block (11), a lubrication mounting plate (10), a motor reducer (12), a motor mounting seat (3), a gear sleeve (13), a drive gear (14), a gear cover (20), roller bearings (15), and a walking shaft (19). The first support plate (1) and the second support plate (6) are both fixed on the bending walking support plate (2), and multiple heavy-duty rollers (5) are respectively fixed on the first support plate (1) and the second support plate (6). The anti-collision screws (4) are fixed on the anti-collision shaft (8), and the anti-collision shaft (8) is fixed on the bending walking support plate (2). The bending center steering fixing seat... (7) Fixed on the bending walking support plate (2); the positioning block (9) fixed on the bending walking support plate (2); the lubrication block (11) installed on the lubrication mounting plate (10), and the lubrication mounting plate (10) installed on the bending walking support plate (2); the motor reducer (12) fixed on the motor mounting base (3); the gear sleeve (13) passes through the motor reducer (12); the drive gear (14) passes through the motor reducer (12); the gear cover (20) passes through the motor reducer (12) and is concentrically connected; the roller bearing (15) is installed on the walking shaft (19), and the roller bearing (15) is axially fixed by the first shaft elastic retaining ring (17); the walking shaft (19) is fixed on the bending walking support plate (2) by the flat washer (16) and the first nut (18).

3. The rebar bending machine according to claim 2, characterized in that, The rebar bending mechanism includes a first dustproof sealing ring (26), an upper central mold top shaft (31), a first plastic bearing (35), a second plastic bearing (37), a third plastic bearing (45), a lower central mold top shaft (42), an upper rebar top shaft (39), a lower rebar top shaft (40), a bending central mold fixing shaft (30), a second dustproof sealing ring (36), and a first bearing (38). The first dustproof sealing ring (26) is installed on the upper central mold top shaft (31); two first plastic bearings (35) are installed on the upper central mold top shaft (31); the third plastic bearing (45) is installed on the lower central mold top shaft (42); the upper central mold top shaft (31) and the... The lower center mold top shaft (42) is connected together; the upper steel bar top shaft (39) is connected together with the lower steel bar top shaft (40); the upper steel bar top shaft (39) and the lower steel bar top shaft (40) pass through the upper center mold top shaft (31) and the lower center mold top shaft (42); the second plastic bearing (37) is fixed on the bending center mold fixing shaft (30); the second dustproof sealing ring (36) is installed on the bending center mold fixing shaft (30); the upper center mold top shaft (31) and the lower center mold top shaft (42) pass concentrically through the bending center mold fixing shaft (30); the first bearing (38) is installed on the bending center mold fixing shaft (30).

4. The rebar bending machine according to claim 3, characterized in that, The rebar bending mechanism includes a star-shaped ring (28), a star-shaped sealing ring copper sleeve (29), a mold rotating sleeve (27), an O-ring (32), a gearbox center sleeve (41), a second bearing (43), a gearbox lower fixed plate (54), a large synchronous pulley (83), a flange (84), a bending gearbox (53), a first skeleton oil seal (34), and a second skeleton oil seal (44). The star-shaped ring (28) is mounted on the star-shaped sealing ring copper sleeve (29); the star-shaped ring (28) is also mounted on the bending center mold fixed shaft (30); the star-shaped ring (28) is also mounted on the mold rotating sleeve (27); and the O-ring (32) is mounted on... The gearbox center sleeve (41) is mounted on the gearbox; the mold rotating sleeve (27) is concentrically mounted with the bending center mold fixing shaft (30); the second bearing (43) is fixed on the gearbox lower fixing plate (54); the large synchronous pulley (83) is connected to the flange (84); the flange (84) is mounted with the bending gearbox (53) through the oil seal spacer (33); the first skeleton oil seal (34) is mounted on the gearbox lower fixing plate (54); the second skeleton oil seal (44) is mounted on the oil seal spacer (33); the gearbox center sleeve (41) is fixed on the bending gearbox (53).

5. The rebar bending machine according to claim 4, characterized in that, The rebar bending mechanism includes a gearbox upper fixed plate (52), a bending center rotating shaft (23), a left support sheet metal (24), a right support sheet metal (25), a bending center rebar support sheet metal (22), a bending center turntable (46), a bending cable chain box transition plate (51), a first bending cable chain box (49), a second bending cable chain box (50), a bending air pipe transition plate (48), and an L-shaped two-way valve (47). The gearbox upper fixed plate (52) is connected to the gearbox lower fixed plate (54) through the bending gearbox (53). The bending center rotating shaft (23) is fixed on the bending gearbox (53). The bending center mold fixing shaft (30) and the mold rotating sleeve (27) are concentrically mounted on the bending center rotating shaft (23). The left support sheet metal (24) and the right support sheet metal (25) are mounted together on the gearbox lower fixed plate (54). The bending center steel bar support sheet metal (22) is installed together with the left side support sheet metal (24) and the right side support sheet metal (25); the bending center turntable (46) is connected to the bending center rotating shaft (23) and axially positions the bending center mold fixing shaft (30) and the mold rotating sleeve (27); the steel bar bending mold (21) is placed on the bending center mold fixing shaft (30); the bending cable box transition plate (51) is fixed on the gearbox upper fixing plate (52); the first bending cable box (49) is connected to the second bending cable box (50); the bending cable box transition plate (51) is connected to the first bending cable box (49); the bending air pipe transition plate (48) is installed on the bending center rotating shaft (23); a plurality of L-shaped two-way valves (47) are installed on the bending air pipe transition plate (48).

6. The rebar bending machine according to claim 4, characterized in that, The rebar bending mechanism includes a motor fixing plate (71), a bending mechanism base (82), a bending motor (67), a first spacer (72), a small synchronous pulley (87), a tensioning connecting sleeve (86), a synchronous belt structure (88), a synchronous pulley cover (85), and a floating joint (81). The mold ejection mechanism includes a mold ejection cylinder (63), a cylinder connecting shaft (62), an adjustable joint (61), a cylinder mounting plate (58), a flanged bearing (79), and a cap (80). The motor fixing plate (71) is fixed on the bending mechanism base (82). The bending mechanism base (82) is connected to the bending center steering fixing seat (7). The bending motor (67) is mounted on the motor fixing plate (71). The first spacer (72) passes through the bending motor (67). The small synchronous pulley (87) is connected to the tensioning connecting sleeve (86). The connecting sleeve (86) is connected to the bending motor (67) as a whole; the synchronous belt structure (88) connects the small synchronous pulley (87) and the large synchronous pulley (83) together; the synchronous pulley cover (85) is installed on the motor fixing plate (71); the floating joint (81) is connected to the mold ejection cylinder (63); the cylinder connecting shaft (62) is connected to the mold ejection cylinder (63); the adjustable joint (61) is inserted into the floating joint (81); the mold ejection cylinder (63) is fixed on the cylinder mounting plate (58); the flange bearing (79) is installed on the cylinder mounting plate (58); the end cap (80) is fixed on the cylinder mounting plate (58); the gearbox lower fixing plate (54) is connected to the bending mechanism base (82).

7. The rebar bending machine according to claim 6, characterized in that, The rebar ejection mechanism includes a push shaft (60), a lower push plate (57), a rebar ejection cylinder (55), a long connecting shaft (56), a cylinder mounting seat (64), a support fixing shaft (74), a push guide shaft (78), an upper push plate (73), a linear bearing (77), a bearing fixing seat (76), and a second shaft elastic retaining ring (75). The push shaft (60) is connected to the lower push plate (57); the push shaft (60) passes through the cylinder mounting plate (58) and is connected to the adjustable joint (61); the rebar ejection cylinder (55) is connected to the lower push plate (57); and the lower end rebar push shaft (40) is connected to the rebar... The ejector cylinder (55) is connected together; the long connecting shaft (56) is connected together with the cylinder mounting plate (58) and the bending mechanism base (82); the cylinder mounting seat (64) is connected together with the bending mechanism base (82) and the cylinder mounting plate (58); the two support fixing shafts (74) and the push guide shaft (78) together connect the lower push plate (57) and the upper push plate (73); the linear bearing (77) is installed in the bearing fixing seat (76); the second shaft is clamped in the bearing fixing seat (76) with an elastic retaining ring (75) to prevent the linear bearing (77) from axially moving.

8. The rebar bending machine according to claim 7, characterized in that, The mold conversion mechanism includes a cylinder mounting bracket (68), a flange bearing (66), a mold conversion cylinder (65), and a conical fixing block (70). The cylinder mounting bracket (68) is mounted on the cylinder mounting base (64). The flange bearing (66) is inserted into the mold conversion cylinder (65). The flange bearing (66) is connected to the cylinder mounting bracket (68). The conical fixing block (70) is fixed on the upper push plate (73). The lower end center mold top shaft (42) is connected to the conical fixing block (70) through a large flat washer (92) and a second nut (93).

9. The rebar bending machine according to any one of claims 1-8, characterized in that, The rebar bending mechanism includes a first rolled-edge copper sleeve (101), a small bending shaft upper sleeve (95), a small bending shaft mandrel (102), a small bending shaft gland (100), a small bending shaft lower sleeve (96), a first internal hexagonal cone end set screw (97), a first bending cylinder transition mounting plate (98), a first bending shaft ejection cylinder (99), and a first bending cylinder connector (103). The first rolled-edge copper sleeve (101) is mounted on the small bending shaft upper sleeve (95); the small bending shaft mandrel (102) is concentrically mounted on the first rolled-edge copper sleeve (101); the small bending shaft gland (100) is mounted on... The small curved shaft upper sleeve (95) is mounted on the small curved shaft; the small curved shaft mandrel (102) is concentrically mounted on the small curved shaft lower sleeve (96); the first internal hexagonal cone end set screw (97) is mounted on the small curved shaft lower sleeve (96) to lock the small curved shaft mandrel (102); the first curved cylinder transition mounting plate (98) is mounted on the first curved shaft ejection cylinder (99); the first curved cylinder connector (103) is mounted on the first curved shaft ejection cylinder (99); the first curved cylinder connector (103) is inserted into the small curved shaft lower sleeve (96).

10. The rebar bending machine according to claim 9, characterized in that, The rebar bending mechanism includes a second rolled-edge copper sleeve (110), a third rolled-edge copper sleeve (112), a large bending shaft upper sleeve (104), a large bending shaft mandrel (111), a large bending shaft gland (109), a large bending shaft lower sleeve (105), a second internal hexagonal cone end set screw (106), a second bending cylinder transition mounting plate (107), a second bending shaft ejection cylinder (108), and a second bending cylinder connector (113). The second rolled-edge copper sleeve (110) and the third rolled-edge copper sleeve (112) are jointly mounted on the large bending shaft upper sleeve (104); the large bending shaft mandrel (111) is concentrically mounted on the second rolled-edge copper sleeve (110) and the third rolled-edge copper sleeve (112). 112) On; the large bending shaft cover (109) is installed on the large bending shaft upper sleeve (104); the large bending shaft spindle (111) is concentrically installed on the large bending shaft lower sleeve (105); the second internal hexagonal cone end set screw (106) is installed on the large bending shaft lower sleeve (105) for locking the large bending shaft spindle (111); the second bending cylinder transition mounting plate (107) is installed on the second bending shaft ejection cylinder (108); the second bending cylinder connector (113) is installed on the second bending shaft ejection cylinder (108); the second bending cylinder connector (113) is inserted into the large bending shaft lower sleeve (105).

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