Hoop bending machine special for steel bar machining

Abstract

The utility model relates to the technical field of reinforcing steel bar processing, and discloses a special hoop bending machine for reinforcing steel bar processing, which comprises a frame, a hydraulic clamp is arranged in the middle of the frame, a plurality of straightening guide wheels are rotatably connected to the front side of the frame, and the straightening guide wheels are symmetrically distributed up and down. Wherein the middle portions of the two straightening guide wheels are fixedly connected with first gears through rotating shafts, the two first gears are meshed, the inner top wall of the frame is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a cam, and the middle portion of one first gear is fixedly connected to the side, away from the first motor, of the cam. According to the utility model, when steel bars are straightened and conveyed along with the operation of the hoop bending machine, lubricating oil can be continuously pumped out of the oil tank and fed into the hoop bending assembly for lubrication by virtue of the matching of the cam and the piston, so that the abrasion of the hoop bending machine during working is reduced, the service life of the hoop bending machine is prolonged, and the stability of the hoop bending machine during working is ensured; and the hoop bending precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar processing, in particular to a special hoop bending machine for steel bar processing. Background Art

[0002] The special hoop bending machine for steel bar processing is a professional equipment for processing steel bars, mainly used in the production of precast concrete components, reinforced concrete structures and other steel bar processing industries. With the development of automation technology, various automation equipment has begun to be widely used in industrial production. The special hoop bending machine for steel bar processing uses advanced control systems, sensors and mechanical structures to automatically complete the bending, cutting, and length-fixing processes of steel bars, greatly improving production efficiency and processing accuracy.

[0003] At present, most of the special steel bar bending machines for bending steel bars first use a set of steel bar straightening structures to complete the straightening and conveying of the steel bars, and then the straightened steel bars pass through the hydraulic clamps and enter the bending mechanism. At the same time, after the bending mechanism completes the bending of the steel bars, in order to ensure that the processed components can fall off the bending machine, the bending mechanism is usually set to a retractable structure, so that after the bending of the components is completed, the bending mechanism can be retracted to lower the steel bar components from the bending machine.

[0004] Due to the movable and retractable characteristics of the bending hoop mechanism, after long-term use, the structure inside the mechanism used to bend the steel bars will be worn due to long-term operation, causing the bending machine to easily get stuck during operation, resulting in differences in the size of the processed steel bar components. For this reason, a special bending machine for steel bar processing is proposed. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a special hoop bending machine for steel bar processing, aiming to improve the problem in the prior art that after long-term use, the structure inside the hoop bending mechanism used for bending the steel bars will be worn due to long-term operation, causing the hoop bending machine to easily get stuck during operation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A special hoop bending machine for steel bar processing comprises a frame, a hydraulic clamp is installed in the middle of the frame, a plurality of straightening guide wheels are rotatably connected to the front side of the frame, and the plurality of straightening guide wheels are symmetrically distributed up and down, wherein the middle parts of two of the straightening guide wheels are fixedly connected with gears 1 through rotating shafts, and the two gears 1 are meshed with each other, a motor 1 is fixedly connected to the top wall of the frame, a cam is fixedly connected to the output end of the motor 1, a middle part of one of the gears 1 is fixedly connected to the side of the cam away from the motor 1, an oil injection channel is opened in the middle side of the top of the frame, a bending hoop assembly is installed in the middle side of the interior of the frame, a discharge assembly is installed at the bottom of the frame, a sleeve is fixedly connected to the top of the frame, a piston is slidably connected to the interior of the sleeve, a T-bar is fixedly connected to the bottom of the piston, a spring is fixedly connected to the top of the piston, both sides of the sleeve are installed with check valves, and an oil tank is fixedly connected to the top edge of the frame, one of the check valves is communicated with the interior of the oil tank, and a valve is fixedly connected to the side of the other check valve away from the sleeve, and the middle part of the valve and the interior of the oil injection channel are communicated through a hose.

[0008] As a further description of the above technical solution:

[0009] The outer periphery of the T-shaped rod passes through the top of the frame and the bottom of the sleeve, and the bottom of the T-shaped rod is arranged on the outer periphery of the cam.

[0010] As a further description of the above technical solution:

[0011] The top of the sleeve is fixedly connected with a retaining ring, and the top of the spring is fixedly connected to the bottom of the retaining ring.

[0012] As a further description of the above technical solution:

[0013] The bending hoop assembly includes a fixed frame, the bottom of the fixed frame is fixedly connected to the bottom wall of the frame, the top of the fixed frame is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected to a movable block, the side of the movable block away from the hydraulic cylinder is fixedly connected to a limiting block, the outer side of the movable block is rotatably connected to a rotating ring, the side of the rotating ring away from the hydraulic cylinder is fixedly connected to a bending block, the outer periphery of the rotating ring close to the hydraulic cylinder is fixedly connected to a gear ring, the side of the movable block close to the hydraulic cylinder is fixedly connected to a bracket, the top of the bracket is fixedly connected to motor 2, the output end of motor 2 is fixedly connected to gear 2, and the gear 2 is meshed with the gear ring.

[0014] As a further description of the above technical solution:

[0015] The side of the outer periphery of the rotating ring away from the gear ring is sleeved inside the frame, a plurality of equidistantly distributed oil holes are opened inside the rotating ring, and the bottom end of the oil injection channel is arranged on the top of the rotating ring.

[0016] As a further description of the above technical solution:

[0017] The unloading assembly includes an L-shaped bracket, the bottom of which is slidably connected to the lower side of the frame, the top of which is fixedly connected to the outside of the bracket, the bottom of the L-shaped bracket is detachably connected to a chassis on one side away from the fixed frame, and a storage branch is installed on the top of the chassis.

[0018] As a further description of the above technical solution:

[0019] One side of the top of the storage branch is arranged below the limiting block and away from the movable block.

[0020] As a further description of the above technical solution:

[0021] Both sides of the front part of the fixing frame are fixedly connected with guide rods, and the outer periphery of the guide rods passes through the L-shaped bracket and the inside of the movable block.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, through the cooperation of the cam, the oil injection channel, the sleeve, the piston, the T-bar, the spring, the retaining ring, the one-way valve, the oil tank and the valve, when the hoop bending machine is running to straighten and transport the steel bars, the worker opens the valve, and with the help of the cooperation of the cam and the piston, the lubricating oil is continuously drawn out from the oil tank and sent into the interior of the hoop bending assembly for lubrication, thereby reducing the wear of the hoop bending machine during operation, thereby increasing the service life of the hoop bending machine, ensuring the stability of the hoop bending machine during operation, and improving the bending accuracy.

[0024] 2. In the utility model, through the cooperation of the hydraulic cylinder, the movable block, the bracket, the L-shaped bracket, the guide rod, the chassis and the storage branch, as the bending hoop assembly completes its work and shrinks to the inside of the frame under the action of the hydraulic cylinder, the chassis and the storage branch will be pulled to the bottom of the limit block by the L-shaped bracket. As the limit block shrinks into the inside of the frame, the bent steel member will fall and hang on the storage branch. Then the bending hoop assembly extends to drive the storage branch to leave from under the limit block, which is convenient for continuing the subsequent bending of the steel bars and collecting the processed steel bar members, thereby reducing the labor input. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of a special stirrup bending machine for steel bar processing proposed by the utility model from a first perspective;

[0026] Figure 2 A stereoscopic diagram of a second viewing angle of a special stirrup bending machine for steel bar processing proposed by the utility model;

[0027] Figure 3This is a sectional stereoscopic diagram of a special stirrup bending machine for steel bar processing proposed by the utility model;

[0028] Figure 4 This is an exploded view of a bending hoop assembly of a special bending hoop machine for steel bar processing proposed by the utility model;

[0029] Figure 5 The utility model is a schematic diagram of the internal structure of a sleeve of a special hoop bending machine for steel bar processing proposed by the utility model.

[0030] Legend:

[0031] 1. Frame; 2. Hydraulic pliers; 3. Straightening guide wheel; 4. Gear 1; 5. Motor 1; 6. Cam; 7. Oil filling channel; 8. Sleeve; 9. Piston; 10. T-bar; 11. Spring; 12. Retaining ring; 13. One-way valve; 14. Oil tank; 15. Valve; 16. Fixed frame; 17. Hydraulic cylinder; 18. Movable block; 19. Limit block; 20. Rotating ring; 21. Bending block; 22. Gear ring; 23. Bracket; 24. Motor 2; 25. Gear 2; 26. L-shaped bracket; 27. Chassis; 28. Storage branch; 29. ​​Guide rod; 30. Oil hole. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 , Figure 2 and Figure 5The utility model provides an embodiment: a special hoop bending machine for steel bar processing, including a frame 1, and a corresponding servo control system is installed inside the frame 1 to help the hoop bending machine to accurately process steel bar components of different shapes. A hydraulic clamp 2 is installed in the middle of the frame 1, and the hydraulic clamp 2 is used to intermittently separate the bent steel bar components from the steel bars, and then obtain separate steel bar components. A plurality of straightening guide wheels 3 are rotatably connected to the front side of the frame 1, and the plurality of straightening guide wheels 3 are symmetrically distributed up and down, and two of the straightening guide wheels 3 are fixedly connected to a gear 4 in the middle through a rotating shaft, and the two gears 4 are meshed, and a motor 5 is fixedly connected to the top wall of the frame 1, and a cam 6 is fixedly connected to the output end of the motor 5, and one of the gears 4 is fixedly connected to the side of the cam 6 away from the motor 5 in the middle. The steel bar to be processed is passed between the upper and lower sets of straightening guide wheels 3, and then the motor 5 is started to drive the two gears 4 to rotate relative to each other, thereby making one set of straightening guide wheels 3 rotate towards each other, pulling the steel bar to move to the right, and at the same time, the steel bar is straightened by multiple straightening guide wheels 3 to ensure that the steel bar remains in a straight state when the hoop bending operation is performed.

[0034] Reference Figure 1 , Figure 3 and Figure 5An oil injection channel 7 is provided at the middle side of the top of the frame 1, and a bending hoop assembly is installed at the middle side of the frame 1. The oil injection channel 7 is used to accurately inject the lubricating oil delivered into the bending hoop assembly to ensure that the internal components of the bending hoop assembly will not be excessively worn when the bending hoop assembly is in operation, and to extend the service life of the bending hoop assembly while ensuring the stability of the bending hoop assembly to avoid jamming. A discharge assembly is installed at the bottom of the frame 1, through which the steel bar components cut off from the steel bars can be collected and stacked, which is convenient for the subsequent unified transportation and use of the steel bar components, and no additional manpower is needed to collect the processed steel bar components. The top of the frame 1 is fixedly connected with a sleeve 8, the inside of the sleeve 8 is slidably connected with a piston 9, the bottom of the piston 9 is fixedly connected with a T-shaped rod 10, the top of the piston 9 is fixedly connected with a spring 11, both sides of the outside of the sleeve 8 are installed with a one-way valve 13, and the top edge of the frame 1 is fixedly connected with an oil tank 14, one of the one-way valves 13 is connected to the inside of the oil tank 14, and the other one-way valve 13 is fixedly connected to the side away from the sleeve 8. The middle of the valve 15 and the inside of the oil injection channel 7 are connected through a hose. When the motor 15 is started to straighten the steel bars and transport them into the hoop bending machine, the cam 6 will push the T-shaped rod 10 upward with a 180° rotation, so that the piston 9 moves up inside the sleeve 8. At this time, the space in the lower layer inside the sleeve 8 is in a negative pressure state, and the upward movement of the piston 9 will squeeze the spring 11, and then the lubricating oil inside the oil tank 14 will enter the inside of the sleeve 8 through the one-way valve 13 on the left. After that, the height of the cam 6 will slowly decrease with the rotation, and at this time, the worker opens the valve 15. At this time, the compressed spring 11 will reset and push the piston 9 downward, so that the bottom of the T-bar 10 is always in contact with the outer periphery of the cam 6. At the same time, the piston 9 will compress the lubricating oil inside the sleeve 8, so that the lubricating oil is discharged from the one-way valve 13 on the right through the pipeline into the valve 15, and then discharged from the hose on the other side of the valve 15 into the oil filling channel 7.

[0035] Reference Figure 3 and Figure 5 The outer periphery of the T-bar 10 passes through the top of the frame 1 and the bottom of the sleeve 8, so that when the T-bar 10 is pushed by the cam 6, it can immediately drive the piston 9 to move inside the sleeve 8, and then suck the lubricating oil from the oil tank 14 into the sleeve 8, waiting for subsequent delivery. The bottom of the T-bar 10 is arranged on the outer periphery of the cam 6, so that when the cam 6 moves, it can drive the T-bar 10 to move, and then use the power of straightening and conveying the steel bars to synchronously convey the lubricating oil, thereby reducing the cost of the hoop bending machine and the power consumption of the hoop bending machine when it is working. A retaining ring 12 is fixedly connected to the top of the sleeve 8, and the top of the spring 11 is fixedly connected to the bottom of the retaining ring 12. The retaining ring 12 can ensure that the top of the sleeve 8 will not be sealed, and can provide support for the piston 9 to compress the spring 11, and then the force generated by the reset of the spring 11 will convey the lubricating oil to the inside of the bending hoop assembly.

[0036] Reference Figure 2 - Figure 4 The bending hoop assembly includes a fixed frame 16, the bottom of the fixed frame 16 is fixedly connected to the bottom wall of the frame 1, the top of the fixed frame 16 is fixedly connected to a hydraulic cylinder 17, the output end of the hydraulic cylinder 17 is fixedly connected to a movable block 18, the side of the movable block 18 away from the hydraulic cylinder 17 is fixedly connected to a limiting block 19, the outer side of the movable block 18 is rotatably connected to a rotating ring 20, the side of the rotating ring 20 away from the hydraulic cylinder 17 is fixedly connected to a bending block 21, the outer periphery of the rotating ring 20 close to the hydraulic cylinder 17 is fixedly connected to a gear ring 22, the side of the movable block 18 close to the hydraulic cylinder 17 is fixedly connected to a bracket 23, the top of the bracket 23 is fixedly connected to a motor 24, the output end of the motor 24 is fixedly connected to a gear 25, and the gear 25 and the gear ring 22 are meshed. The steel bar passes through the inner side of the hydraulic clamp 2 and enters between the bending block 21 and the limit block 19. At this time, the motor 24 is started to drive the rotating ring 20 to rotate through the cooperation of the gear 25 and the gear ring 22, so that the rotating ring 20 will drive the bending block 21 to make a circular motion when rotating. Under the control of the precise servo control system, the motor 24 can accurately control the movement distance of the bending block 21, and squeeze the steel bar to the outside of the limit block 19 through the circular motion of the bending block 21, and then bend the steel bar 90°. Then the motor 24 is started to drive the bending block 21 to rotate in the opposite direction and reset to its original position. After that, the motor 15 is started again to transport the steel bar. Repeating the operation multiple times can conveniently bend the steel bar into a square, or the control system can be used to control the movement trajectory of the bending block 21, so that the bending hoop assembly can process steel bar components of other shapes, such as round, S-shaped and trapezoidal. At the same time, the hydraulic cylinder 17 is activated to pull the movable block 18 and the rotating ring 20 toward the rear side, and then the movable block 18 and the rotating ring 20 respectively drive the limit block 19 and the bending block 21 to retract from the front side of the frame 1 to the inside of the frame 1. At this time, the processed steel bar component will fall downward without the support of the limit block 19 or the bending block 21.

[0037] Reference Figure 2 - Figure 4, the side of the outer periphery of the rotating ring 20 away from the gear ring 22 is sleeved inside the frame 1, so that the rotating ring 20 will not conflict with the inner wall of the frame 1 when rotating, and will not conflict with the inner wall of the frame 1 when the rotating ring 20 moves backward. A plurality of equidistantly distributed oil holes 30 are provided inside the rotating ring 20, and the bottom end of the oil injection channel 7 is arranged at the top of the rotating ring 20. The lubricating oil that slips down inside the oil injection channel 7 can be transported to between the movable block 18 and the rotating ring 20 through the oil holes 30, further lubricating the bending hoop assembly to reduce its wear during operation. The unloading assembly includes an L-shaped bracket 26, the bottom of the L-shaped bracket 26 is slidably connected to the lower side of the frame 1, the top of the L-shaped bracket 26 is fixedly connected to the outside of the bracket 23, and the side of the bottom of the L-shaped bracket 26 away from the fixed frame 16 is detachably connected to the chassis 27, and the top of the chassis 27 is installed with a storage branch 28. As the hydraulic cylinder 17 pulls the movable block 18 and the bracket 23 to move backward, the L-shaped bracket 26 is driven to move backward with the help of the connection between the bracket 23 and the movable block 18, and the chassis 27 and the storage branch 28 are pulled backward by the L-shaped bracket 26, so that one side branch of the storage branch 28 will stay below the original position of the limit block 19. At this time, the fallen steel bar component will be caught by one side branch of the storage branch 28, so that the square steel bar component can be sleeved on the storage branch 28. Then, as the hydraulic cylinder 17 is started to push the bending hoop assembly back to its original position, the next steel bar component can be processed, and the processed steel bar components are collected and placed again by the unloading assembly. By disassembling the chassis 27 and the L-shaped bracket 26, the worker can push the chassis 27 to uniformly transport the steel bar components collected on the storage branch 28, which is convenient for the subsequent collection and use of the steel bar components. One side of the top of the storage branch 28 is arranged below the limit block 19 and away from the side of the movable block 18, so that the steel bar components that are cut and dropped will be hooked and collected by the storage branch 28 in the first place. Both sides of the front of the fixed frame 16 are fixedly connected with guide rods 29, and the outer periphery of the guide rods 29 passes through the L-shaped bracket 26 and the inside of the movable block 18. The guide rods 29 can ensure the stability of the movable block 18 and the L-shaped bracket 26 during movement, and then ensure the stability of the relative movement trend between the movable block 18 and the rotating ring 20, thereby improving the working strength of the bending hoop assembly.

[0038] Working principle: The steel bar is passed between the upper and lower rows of straightening guide wheels 3, and then the motor 1 5 is started to drive the two gears 1 4 to rotate relative to each other, and then one group of straightening guide wheels 3 rotates in the opposite direction, pulling the steel bar to move to the right, and at the same time, the steel bar is straightened by multiple straightening guide wheels 3 to ensure that the steel bar remains in a straight state when the hoop bending operation is performed. After that, the steel bar passes from the inner side of the hydraulic clamp 2 into the bending block 21 and the limit block 19. At this time, the motor 2 24 is started to drive the rotating ring 20 to rotate through the cooperation of the gear 2 25 and the gear ring 22, so that the rotating ring 20 will drive the bending block 21 to make a circular motion when rotating. Under the control of the precise servo control system, the motor 2 24 can accurately control the distance of the bending block 21 movement, and squeeze the steel bar on the outside of the limit block 19 through the circular motion of the bending block 21, and then bend the steel bar 90°, and then the motor 2 24 is started to drive the bending block 21 to rotate in the opposite direction and reset to its original position. Then, the motor 15 is started to transport the steel bar. Repeating the operation several times can conveniently bend the steel bar into a square shape. Then, the hydraulic pliers 2 are started to cut the bent steel bar components from the steel bar. At the same time, the hydraulic cylinder 17 is started to pull the movable block 18 and the rotating ring 20 toward the rear side, so that the movable block 18 and the rotating ring 20 respectively drive the limit block 19 and the bending block 21 to shrink from the front side of the frame 1 to the inside of the frame 1. At this time, the processed steel bar components will fall downward due to the lack of support of the limit block 19 or the bending block 21. At the same time, the L-shaped bracket 26 is driven to move backward with the help of the connection between the bracket 23 and the movable block 18. The chassis 27 and the storage branch 28 are pulled backward by the L-shaped bracket 26, so that one side branch of the storage branch 28 will stay below the original position of the limit block 19. At this time, the fallen steel bar components will be caught by one side branch of the storage branch 28, so that the square steel bar components can be sleeved on the storage branch 28. Subsequently, as the hydraulic cylinder 17 is started to push the bending hoop assembly back to its original position, the next steel bar component can be processed. At the same time, the processed steel bar components are collected and placed again through the unloading assembly, which is convenient for the subsequent collection and use of the steel bar components.

[0039] At the same time, when the motor 5 is started and drives two relatively distributed straightening guide wheels 3 to rotate and straighten the steel bars, the cam 6 will rotate 180° to push the T-bar 10 upward, so that the piston 9 moves up inside the sleeve 8. At this time, the space in the lower layer inside the sleeve 8 is in a negative pressure state. At the same time, the upward movement of the piston 9 will squeeze the spring 11, and then the lubricating oil in the oil tank 14 will enter the sleeve 8 through the one-way valve 13 on the left. After that, the cam 6 continues to rotate 180°, and the height of the cam 6 will slowly decrease with the rotation, and the worker opens the valve 15 at this time. At this time, the compressed spring 11 will reset and push the piston 9 downward, so that the bottom of the T-bar 10 is always in contact with the outer periphery of the cam 6. At the same time, the piston 9 will compress the lubricating oil inside the sleeve 8, so that the lubricating oil is discharged from the one-way valve 13 on the right through the pipeline into the valve 15, and then discharged from the hose on the other side of the valve 15 into the oil injection channel 7. Finally, the lubricating oil drips on the outside of the rotating ring 20 along the oil injection channel 7. As the rotating ring 20 rotates, the lubricating oil is applied to the outside of the rotating ring 20 and the inner wall of the frame 1. At the same time, the lubricating oil will also be injected from the oil hole 30 between the outside of the movable block 18 and the inside of the rotating ring 20 to lubricate the movable block 18 and the rotating ring 20. Then, the wear of the bending hoop assembly during operation is effectively reduced. After opening for a period of time, the valve 15 can be closed. At this time, since the lubricating oil inside the sleeve 8 cannot be discharged, the spring 11 cannot push the piston 9 downward, and the piston 9 and the T-bar 10 remain stationary. Until the cam 6 rotates to one side again to lift the T-bar 10, the piston 9 moves up again to suck in the lubricating oil. As the cam 6 rotates and the bottom of the T-bar 10 disengages, the inside of the sleeve 8 is in a sealed state, the piston 9 and the T-bar 10 cannot move, and the bottom of the T-bar 10 always remains at the highest point, which will not affect the rotation of the cam 6, and will not affect the drive of the motor 5.

[0040] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special stirrup bending machine for steel bar processing, comprising a frame (1), characterized in that: A hydraulic clamp (2) is installed in the middle of the frame (1), and a plurality of straightening guide wheels (3) are rotatably connected to the front side of the frame (1). The plurality of straightening guide wheels (3) are symmetrically distributed in the upper and lower parts, and two of the straightening guide wheels (3) are fixedly connected to a gear (4) in the middle through a rotating shaft, and the two gears (4) are meshed with each other. A motor (5) is fixedly connected to the top wall of the frame (1), and a cam (6) is fixedly connected to the output end of the motor (5). The middle part of one of the gears (4) is fixedly connected to the side of the cam (6) away from the motor (5). An oil injection channel (7) is opened in the middle of the top of the frame (1), and a bending hoop assembly is installed in the middle of the frame (1). A discharge assembly is installed at the bottom of the frame (1), a sleeve (8) is fixedly connected to the top of the frame (1), a piston (9) is slidably connected inside the sleeve (8), a T-shaped rod (10) is fixedly connected to the bottom of the piston (9), a spring (11) is fixedly connected to the top of the piston (9), one-way valves (13) are installed on both sides of the outside of the sleeve (8), an oil tank (14) is fixedly connected to the top edge of the frame (1), one of the one-way valves (13) is connected to the inside of the oil tank (14), and a valve (15) is fixedly connected to the side of the other one-way valve (13) away from the sleeve (8), and the middle of the valve (15) and the inside of the oil injection channel (7) are connected through a hose.

2. A special stirrup bending machine for steel bar processing according to claim 1, characterized in that: The outer periphery of the T-shaped rod (10) passes through the top of the frame (1) and the bottom of the sleeve (8), and the bottom of the T-shaped rod (10) is arranged on the outer periphery of the cam (6).

3. A special stirrup bending machine for steel bar processing according to claim 1, characterized in that: The top of the sleeve (8) is fixedly connected to a retaining ring (12), and the top of the spring (11) is fixedly connected to the bottom of the retaining ring (12).

4. The special stirrup bending machine for steel bar processing according to claim 1, characterized in that: The bending hoop assembly comprises a fixed frame (16), the bottom of the fixed frame (16) is fixedly connected to the inner bottom wall of the frame (1), the top of the fixed frame (16) is fixedly connected to a hydraulic cylinder (17), the output end of the hydraulic cylinder (17) is fixedly connected to a movable block (18), a side of the movable block (18) away from the hydraulic cylinder (17) is fixedly connected to a limiting block (19), the outer side of the movable block (18) is rotatably connected to a rotating ring (20), and the rotating ring (20) is away from the A bending block (21) is fixedly connected to one side of the hydraulic cylinder (17); a gear ring (22) is fixedly connected to the outer periphery of the rotating ring (20) on the side close to the hydraulic cylinder (17); a bracket (23) is fixedly connected to the side of the movable block (18) close to the hydraulic cylinder (17); a motor 2 (24) is fixedly connected to the top of the bracket (23); a gear 2 (25) is fixedly connected to the output end of the motor 2 (24); and the gear 2 (25) is meshed with the gear ring (22).

5. A special stirrup bending machine for steel bar processing according to claim 4, characterized in that: The side of the outer periphery of the rotating ring (20) away from the gear ring (22) is sleeved inside the frame (1), a plurality of equidistantly distributed oil holes (30) are provided inside the rotating ring (20), and the bottom end of the oil injection channel (7) is arranged at the top of the rotating ring (20).

6. A special stirrup bending machine for steel bar processing according to claim 4, characterized in that: The unloading assembly comprises an L-shaped bracket (26), the bottom of the L-shaped bracket (26) is slidably connected to the lower side of the frame (1), the top of the L-shaped bracket (26) is fixedly connected to the outside of the bracket (23), and the bottom of the L-shaped bracket (26) is detachably connected to a chassis (27) on a side away from the fixed frame (16), and a storage branch (28) is installed on the top of the chassis (27).

7. A special stirrup bending machine for steel bar processing according to claim 6, characterized in that: One side of the top of the storage branch (28) is arranged below the limiting block (19) and away from the movable block (18).

8. The special stirrup bending machine for steel bar processing according to claim 6, characterized in that: Both sides of the front of the fixed frame (16) are fixedly connected with guide rods (29), and the outer periphery of the guide rods (29) passes through the L-shaped bracket (26) and the inside of the movable block (18).

Images