Pipe bending machine

Abstract

The invention belongs to the technical field of pipe fitting machining devices and discloses a pipe fitting bending machine which comprises a base and a rotating wheel arranged at the top end of the base, a pressing block is arranged on the outer side of the rotating wheel, a positioning shaft and a pressing shaft are arranged on one side of the pressing block, a base is installed below the positioning shaft and the pressing shaft, and the end face of the bottom end of the base is arranged to be an arc face. The bending direction of the pipe fitting can be changed by arranging the convex part and the concave part on the rotating path of the rotating shaft, and the pipe fitting can be pushed by arranging the bevel rack on the rotating path of the rotating shaft, so that the pressing block is located at the upper bending position and the lower bending position of the pipe fitting, and in the whole process, workers do not need to carry out auxiliary operation on the pipe fitting; due to the fact that the power source is only arranged at one end of the pipe fitting, the pipe fitting is stable in the whole moving process.

Description

Technical Field

[0001] This invention relates to the field of pipe processing equipment technology, and in particular to a pipe bending machine. Background Technology

[0002] Pipe fittings have a wide range of applications, among which elbows are the most important and widely used. Currently, there are a variety of elbow manufacturing methods, including diameter expansion and bending, tunnel extrusion, molding bending, plate welding, and shrimp-shaped bends.

[0003] Chinese patent CN220028460U discloses an automatic pipe bending device for air conditioning pipes. The device uses a negative pressure hole in the guide groove to adsorb the straight copper pipe, so that the straight copper pipe is in close contact with the guide groove and the telescopic shaft during the shaft feeding process, and keeps the straight copper pipe coaxial with the guide groove and the telescopic shaft, thus preventing the straight copper pipe from being lifted and falling off due to the entry of air inside the pipe.

[0004] The aforementioned device uses multiple power sources to transport and clamp pipe fittings. In actual use, these multiple power sources need to coordinate, which makes the overall equipment quite large and complex, inconvenient for temporary use on construction sites. Furthermore, when problems arise in the coordination between the multiple power sources, the pipe fittings can be damaged. In addition, when adjusting the bending position of the pipe fittings, the programs of multiple power sources need to be modified, making the overall operation inconvenient. In summary, the aforementioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a pipe bending machine to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a pipe bending machine to solve the problems mentioned in the background art. Existing devices use multiple power sources to transport and clamp pipes. In actual use, these multiple power sources need to coordinate, which makes the overall equipment large and complex, inconvenient for temporary use on construction sites. Furthermore, when problems occur in the coordination between multiple power sources, the pipes will be damaged. In addition, when adjusting the bending position of the pipes, the programs of multiple power sources need to be modified, making the overall operation inconvenient.

[0007] Based on the above ideas, the present invention provides the following technical solution: a pipe bending machine, comprising a base and a rotating wheel disposed at the top of the base, a pressure block disposed on the outer side of the rotating wheel, a pipe fitting disposed between the rotating wheel and the pressure block, a positioning shaft and a pressure shaft disposed on one side of the pressure block, a base mounted below the positioning shaft and the pressure shaft, and the bottom end face of the base being set as an arc surface, a support plate being rotatably mounted below the base, a boss disposed below the pressure block, a connecting block disposed below the boss, a slider disposed below the support plate, an annular groove being opened on the top end face of the base for sliding cooperation with the slider and the connecting block, and a rotating shaft disposed on the side of the base away from the boss; A limiting component that cooperates with the rotating shaft is provided above the base. When the base rotates around the rotating wheel, the rotating shaft and the limiting component can drive the base to rotate relative to the support plate, thereby causing the pipe to rotate. The base is equipped with a drive assembly that cooperates with the rotating shaft. Multiple bevel racks are provided above the base. A bevel gear that meshes with the bevel rack is fixedly sleeved on the outside of the rotating shaft. When the rotating shaft rotates with the base to the bevel rack, the rotating shaft can drive the positioning shaft and the pressure shaft to rotate relative to each other through the drive assembly.

[0008] As a further embodiment of the present invention: the limiting component includes a lower top plate and an upper top plate disposed above the lower top plate, and the upper top plate and the lower top plate are provided with a recess and a protrusion on opposite sides, and the rotating shaft passes through the space between the upper top plate and the lower top plate.

[0009] As a further aspect of the present invention: a vertical shaft is mounted on the bottom end of the positioning shaft via a one-way bearing, and a vertical shaft is mounted on the bottom end of the pressure shaft via a one-way bearing. Coil springs are sleeved on the outer sides of both the vertical shaft and the vertical shaft. One end of each coil spring is connected to the vertical shaft and the vertical shaft respectively, and the other end of each coil spring is connected to the base.

[0010] As a further aspect of the present invention: the drive assembly includes driven gears fixedly sleeved on the outside of the vertical shaft and the outer side of the vertical shaft, the driven gears on the outside of the vertical shaft and the outer side of the vertical shaft meshing with each other, a connecting shaft rotatably arranged on the side of the base near the rotating shaft, the connecting shaft and the rotating shaft being connected by a universal joint, a worm gear fixedly arranged on the end of the connecting shaft away from the rotating shaft, and a worm wheel meshing with the worm gear sleeved on the vertical shaft.

[0011] As a further embodiment of the present invention: a locking block is elastically installed on the outer wall of the vertical shaft, a locking groove that cooperates with the locking block is opened on the inner wall of the worm gear, a fixing frame is fixedly installed at the bottom end of the vertical shaft, and a first electromagnet is fixedly installed at the bottom end inside the fixing frame. A sliding plate is elastically installed above the first electromagnet, and a pull rope is fixedly installed between the sliding plate and the locking block. The sliding plate is made of iron.

[0012] As a further aspect of the present invention: a pull plate is installed at the slider, and the pull plate slides in cooperation with the slider. A second electromagnet is provided above the pull plate, and the pull plate elastically cooperates with the second electromagnet. The pull plate is made of iron. Multiple insertion holes are opened on the bottom surface inside the annular groove. An insertion rod that cooperates with the insertion hole is fixedly provided at the bottom of the pull plate. An arc-shaped slide rod is fixedly provided on the side of the connecting block near the slider. The slide rod passes through the slider and slides in cooperation with the slider. A baffle is fixedly provided at one end of the slide rod that passes through the slider. A limiting spring is sleeved on the outside of the slide rod. The limiting spring is located between the baffle and the slider.

[0013] As a further aspect of the present invention: a retaining strip is fixedly provided on the bottom surface of the base, and an arc-shaped groove is provided on the side of the support plate near the base to slide with the retaining strip. The cross-sections of the arc-shaped groove and the retaining strip are both T-shaped.

[0014] As a further aspect of the present invention, a connecting rod is fixedly provided between the support plate and the slider.

[0015] As a further embodiment of the present invention: an L-shaped bracket is fixedly provided between the upper top plate and the base, and a fixing rod is fixedly provided between the lower top plate and the base.

[0016] As a further aspect of the present invention: a positioning rod is fixedly provided on the slider, and in the initial state, one end of the positioning rod is in contact with the connecting block.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This device can change the bending direction of the pipe by arranging protrusions and recesses on the path of the rotating shaft, and can push the pipe by arranging a conical rack on the path of the rotating shaft, so that the pressure block is at the next bending position of the pipe. In the whole process, no operator is required to assist the pipe. Since the power source is arranged only at one end of the pipe (the pipe is bent and moved by the cooperation of the rotating wheel and the pressure block), the pipe moves more smoothly during the whole process. The rotating wheel rotates in the same direction throughout the bending process, making the whole bending process smoother and more continuous. In addition, the bending position of the pipe can be quickly adjusted according to the position of the conical rack and protrusions, making the overall operation more convenient. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 A magnified structural diagram at point A; Figure 3 This is a schematic diagram of the slide bar and limiting spring structure of the present invention; Figure 4 This is a schematic diagram of the card strip structure of the present invention; Figure 5 This is a schematic diagram of the insertion rod structure of the present invention; Figure 6 This is a schematic diagram of the vertical axis and the vertical shaft structure of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point C; Figure 8 This is a schematic diagram of the connection structure between the rotating shaft and the connecting shaft of the present invention; Figure 9 This is a schematic diagram of the limiting block structure of the present invention; Figure 10 This is a cross-sectional view of the limiting block of the present invention; Figure 11 This is a usage scenario diagram of the present invention; Figure 12 This is a schematic diagram of the positioning shaft and the pressure shaft that drive the pipe to move according to the present invention.

[0020] In the diagram: 1. Base; 101. Insertion hole; 2. Telescopic unit; 3. Pressure block; 4. Lower top plate; 5. Rotary wheel; 6. Upper top plate; 7. Positioning shaft; 8. Pressure shaft; 9. Pipe fitting; 10. Recess; 11. Protrusion; 12. Limiting spring; 13. Mounting frame; 14. Rotating shaft; 15. Slider; 1501. Positioning rod; 16. Base; 1601. Locking strip; 17. Support plate; 18. 19. Slide rod; 20. Connecting block; 21. Boss; 22. Bevel gear; 23. Bevel rack; 24. Pull plate; 25. Insert rod; 26. Connecting shaft; 27. Coil spring; 28. Vertical shaft; 29. ​​Worm gear; 30. Driven gear; 31. Mounting base; 32. Vertical shaft; 33. Protrusion; 34. Locking block; 35. Pull rope; 36. Slide plate; 37. Limiting block; 38. Inclined surface; 39. Worm gear. Detailed Implementation

[0021] like Figures 1-6 As shown, a pipe bending machine includes a base 1 and a roller 5 disposed at the top and center of the base 1. A pressure block 3 is disposed on the outer side of the roller 5. (Refer to...) Figure 3 As shown, in actual use, the pipe fitting 9 to be bent is placed between the rotating wheel 5 and the pressure block 3. In order to position the pipe fitting 9, a positioning shaft 7 and a pressure shaft 8 are provided on one side of the pressure block 3, so that the pipe fitting 9 is restricted between the positioning shaft 7 and the pressure shaft 8. Of course, the positioning shaft 7 and the pressure shaft 8 are arranged along the tangent of the rotating wheel 5. In this solution, a base 16 is installed below the positioning shaft 7 and the pressure shaft 8, and the bottom end face of the base 16 is set as an arc surface. An arc-shaped support plate 17 is provided below the base 16, so that the base 16 can rotate relative to the support plate 17. Furthermore, a boss 20 is provided below the pressure block 3. The boss 20 can rotate synchronously with the rotating wheel 5. In actual use, the boss 20 can be fixedly installed on the outer circumferential surface of the rotating wheel 5. A connecting block 19 is provided below the boss 20, and a slider 15 is provided below the support plate 17. (Refer to...) Figure 3As shown, the top end face of the base 1 has an annular groove that slides with the slider 15 and the connecting block 19, and the axis of the annular groove coincides with the axis of the rotating wheel 5. In actual use, a rotating shaft 14 is provided on the side of the base 16 away from the boss 20. The rotating shaft 14 can drive the positioning shaft 7 and the pressure shaft 8 to rotate relative to each other, thereby pushing the pipe 9. (Refer to...) Figure 1 As shown, a limiting component that cooperates with the rotating shaft 14 is provided above the base 1. When the base 16 rotates around the rotating wheel 5, the rotating shaft 14 and the limiting component can drive the base 16 to rotate relative to the support plate 17, thereby causing the pipe 9 to rotate, which is beneficial for adjusting the bending direction of the pipe 9. In addition, a drive assembly that cooperates with the rotating shaft 14 is provided in the base 16, and multiple bevel racks 22 (the bevel rack 22 can be regarded as a section cut from the bevel gear ring, which is an arc-shaped structure) are provided on the upper part of the base 1. The outer side of the rotating shaft 14 is fixedly sleeved with a bevel gear 21 that meshes with the bevel rack 22. When the rotating shaft 14 rotates with the base 16 to the bevel rack 22, the meshing of the bevel rack 22 and the bevel gear 21 can drive the rotating shaft 14 to rotate, so that the rotating shaft 14 can drive the positioning shaft 7 and the pressure shaft 8 to rotate relative to each other through the drive assembly, which is beneficial for pushing the pipe 9.

[0022] The aforementioned limiting assembly includes a lower top plate 4 and an upper top plate 6 disposed above the lower top plate 4. Each of the upper top plate 6 and the lower top plate 4 has a recess 10 and a protrusion 11 on its opposite side. The recess 10 of the upper top plate 6 and the protrusion 11 of the lower top plate 4 are vertically aligned. Similarly, the protrusion 11 of the upper top plate 6 and the recess 10 of the lower top plate 4 are also vertically aligned. The aforementioned rotating shaft 14 passes between the upper top plate 6 and the lower top plate 4. When the base 16 rotates around the rotating wheel 5, the rotating shaft 14 rotates between the upper top plate 6 and the lower top plate 4. When the rotating shaft 14 rotates to the position of the recess 10 and the protrusion 11, the rotating shaft 14 is squeezed and deflected. During this process, the bending direction of the pipe 9 can be adjusted.

[0023] The aforementioned conical rack 22 is fixedly installed on the outer peripheral wall of the lower top plate 4.

[0024] Reference Figures 1-8 , Figures 11-12As shown, the bottom end of the positioning shaft 7 is equipped with a vertical shaft 26 via a one-way bearing, while the bottom end of the pressure shaft 8 is equipped with a vertical shaft 30 via a one-way bearing. This allows the vertical shaft 26 to drive the positioning shaft 7 to rotate in only one direction. Similarly, the vertical shaft 30 can also drive the pressure shaft 8 to rotate in only one direction. Furthermore, both the outer sides of the vertical shaft 30 and the vertical shaft 26 are fitted with coil springs 25. Specifically, the two ends of the coil spring 25 located at the vertical shaft 26 are connected to the vertical shaft 26 and the base 16, respectively, while the two ends of the coil spring 25 located at the vertical shaft 30 are connected to the base 16 and the vertical shaft 30, respectively. The aforementioned drive assembly includes a driven gear 28 fixedly sleeved on the outside of the vertical shaft 30 and the outer side of the vertical shaft 26. The driven gears 28 on the outside of the vertical shaft 30 and the vertical shaft 26 mesh with each other. Through this structure, the positioning shaft 7 and the pressure shaft 8 can rotate relative to each other. A connecting shaft 24 is provided on the side of the base 16 near the rotating shaft 14. The connecting shaft 24 passes through the base 16 and rotates with it. The connecting shaft 24 and the rotating shaft 14 are connected by a universal joint. Through this structure, even if there is a certain angle between the connecting shaft 24 and the rotating shaft 14, the rotating shaft 14 and the connecting shaft 24 can rotate synchronously. A worm gear 27 is fixedly provided on the end of the connecting shaft 24 away from the rotating shaft 14, and a worm wheel 36 that meshes with the worm gear 27 is sleeved on the vertical shaft 30. Furthermore, a retaining block 32 is elastically installed on the outer wall of the vertical shaft 30, while a retaining groove that mates with the retaining block 32 is provided on the inner wall of the worm gear 36, as shown in the reference. Figure 7 As shown, a fixed frame is fixedly installed at the bottom of the vertical shaft 30. A first electromagnet is fixedly installed at the bottom of the fixed frame, and a sliding plate 34 is elastically installed above the first electromagnet (a second spring is fixedly installed between the sliding plate 34 and the first electromagnet). The sliding plate 34 is slidably installed in the fixed frame. A pull rope 33 is fixedly installed between the sliding plate 34 and the locking block 32. The pull rope 33 passes through the vertical shaft 30 and the fixed frame and slides in cooperation with both. The sliding plate 34 is made of iron. With this structure, when the first electromagnet is energized, the attraction of the first electromagnet to the sliding plate 34 can pull the locking block 32 out of the slot.

[0025] Reference Figure 3 , Figure 5 As shown, in order to position the slider 15, a pull plate 23 is installed at the slider 15, and the pull plate 23 slides with the slider 15. A second electromagnet is provided above the pull plate 23, and the pull plate 23 is elastically engaged with the second electromagnet. The pull plate 23 is made of iron. Multiple insertion holes 101 are opened on the bottom surface inside the annular groove, and a plug rod 2301 that cooperates with the insertion holes 101 is fixedly provided at the bottom of the pull plate 23. An arc-shaped slide rod 18 is fixedly installed on the side of the connecting block 19 near the slider 15. The slide rod 18 passes through the slider 15 and slides with it. A baffle is fixedly installed at one end of the slide rod 18 that passes through the slider 15. A limiting spring 12 is sleeved on the outside of the slide rod 18. The limiting spring 12 is located between the baffle and the slider 15. (Refer to...) Figure 3 As shown, a positioning rod 1501 is fixedly installed on the slider 15. In the initial state, one end of the positioning rod 1501 is in contact with the connecting block 19.

[0026] In actual use, the tube 9 to be bent is passed between the positioning shaft 7 and the pressure shaft 8 and placed between the rotating wheel 5 and the pressure block 3. The telescopic unit 2 drives the pressure block 3 to approach the rotating wheel 5 and press the tube 9. Then, the external drive unit drives the rotating wheel 5 and the pressure block 3 to rotate. During this process, the connecting block 19 will gradually move away from the slider 15 and compress the limiting spring 12. Since the tube 9 is restricted between the positioning shaft 7 and the pressure shaft 8, the rotating wheel 5 and the pressure block 3 can cause the tube 9 to bend during rotation, and the tube 9 will also move relative to the positioning shaft 7 and the pressure shaft 8. When the pipe fitting 9 is bent to a specified angle, the rotating wheel 5 stops rotating. At this time, the operator can control the second electromagnet to make it energized, so that the pull plate 23 can drive the insertion rod 2301 to move upward, so that the bottom end of the insertion rod 2301 can move out of the insertion hole 101. After the insertion rod 2301 separates from the insertion hole 101, the pressure of the limiting spring 12 on the slider 15 can drive the slider 15 to move in the annular groove and gradually approach the connecting block 19. During this process, the base 16 and the rotating shaft 14 on one side of it will rotate around the rotating wheel 5. When the bending direction of pipe fitting 9 does not need to be adjusted during the next bend, it is only necessary to arrange the corresponding bevel rack 22 on the rotation path of the rotating shaft 14. During the rotation of the rotating shaft 14, the bevel gear 21 on the outside of the rotating shaft 14 can mesh with the arranged bevel rack 22, thereby driving the rotating shaft 14 to rotate. Through the setting of the universal joint, the rotating shaft 14 can drive the connecting shaft 24 and the worm gear 27 to rotate. Through the meshing of the worm gear 27 and the worm wheel 36, the vertical shaft 30 can be driven to rotate. Through the set driven gear 28, the vertical shaft 30 and the vertical shaft 26 can rotate relative to each other and compress the coil spring 25. Since the vertical shaft 26 and the vertical shaft 30 are connected to the positioning shaft 7 and the pressure shaft 8 through one-way bearings, the vertical shaft 30 and the vertical shaft 26 are in a state of independent rotation during the above process. When the positioning rod 1501 on the slider 15 re-fits the connecting block 19, the slider 15 will stop rotating. At this time, the operator can... The second electromagnet is de-energized, allowing the insertion rod 2301 to be re-inserted into the insertion hole 101, thereby locking the slider 15. Simultaneously, the first electromagnet is energized, and the attraction of the first electromagnet to the slide plate 34 pulls the slide plate 34, thereby pulling one end of the locking block 32 out of the slot through the pull rope 33, causing the worm gear 36 to disengage from the vertical shaft 30. At this time, the force of the compressed coil spring 25 can drive the vertical shaft 30 and the vertical shaft 26 to rotate, thereby driving the pressure shaft 8 and the positioning shaft 7 to rotate. During this process, the tube 9 can be moved forward, so that the pressure block 3 is in the position where the tube 9 needs to be bent next. In practical applications, by controlling the length of the bevel rack 22, the number of rotations of the rotating shaft 14, the worm gear 27 and the vertical shaft 30 can be controlled, thereby controlling the forward distance of the tube 9, so that the pressure block 3 can be accurately in the position where the tube 9 needs to be bent next. When the bending direction of the pipe 9 needs to be adjusted during the next bend, a protrusion 11 and a recess 10 can be arranged in the path of the rotating shaft 14. This allows the rotating shaft 14 to pass between the relatively arranged protrusion 11 and recess 10 during its rotation. The pressure of the protrusion 11 on the rotating shaft 14 can cause the rotating shaft 14 to deflect, thereby causing the base 16 and the positioning shaft 7 and pressure shaft 8 on the base 16 to deflect. As the positioning shaft 7 and pressure shaft 8 deflect, the pipe 9 can rotate, thereby adjusting the bending direction of the pipe 9. After the rotating shaft 14 moves out of the protrusion 11 and recess 10, the rotating shaft 14 and the base 16 can remain stable. Subsequently, the coil spring 25 can be compressed by the meshing of the bevel gear 21 and the bevel rack 22. Since the subsequent steps are the same as described above, they will not be repeated here.

[0027] In summary, this device can change the bending direction of the pipe 9 by arranging protrusions 11 and recesses 10 along the rotation path of the rotating shaft 14, and can push the pipe 9 by arranging a conical rack 22 along the rotation path of the rotating shaft 14, so that the pressure block 3 is positioned at the next bend of the pipe 9. Throughout the process, no operator is required to assist the pipe 9. Since the power source is only arranged at one end of the pipe 9 (the pipe 9 is bent and moved by the cooperation of the rotating wheel 5 and the pressure block 3), the pipe 9 moves relatively smoothly during the overall movement. The rotating wheel 5 rotates in the same direction throughout the bending process of the pipe 9, making the entire bending process smoother and more continuous. In addition, the bending position of the pipe 9 can be quickly adjusted according to the arrangement of the conical rack 22 and protrusions 11, making the overall operation more convenient.

[0028] like Figures 1-3 As shown, a round shaft can be fixedly installed on the bottom end face of the rotating wheel 5. The bottom end of the round shaft passes through the base 1 and rotates with it through a bearing. The drive unit can be a motor, which is installed below the base 1 so that the output shaft of the motor is connected to the round shaft for transmission, thereby driving the rotating wheel 5 to rotate.

[0029] The aforementioned telescopic unit 2 can be a cylinder, which is fixedly installed on the top of the boss 20, and the telescopic end of the cylinder is fixedly connected to the pressure block 3.

[0030] A connecting rod is fixedly installed between the support plate 17 and the slider 15. An L-shaped bracket is fixedly installed between the upper top plate 6 and the base 1, and a fixing rod is fixedly installed between the lower top plate 4 and the base 1. Multiple brackets and fixing rods are arranged in a circular array. Figure 3 As shown, a support rod is fixedly installed between the boss 20 and the connecting block 19.

[0031] The outer peripheral walls of the rotating wheel 5, the positioning shaft 7, and the pressure shaft 8 are all provided with annular grooves that cooperate with the pipe fitting 9, while the end face of the pressure block 3 near the rotating wheel 5 is provided with an arc-shaped opening so as to better fit the outside of the pipe fitting 9.

[0032] Reference Figure 3 As shown, a mounting frame 13 is fixedly installed on the outer side of the base 16. The end of the rotating shaft 14 away from the bevel gear 21 extends into the mounting frame 13 and rotates with it. The end of the connecting shaft 24 that passes through the base 16 extends into the mounting frame 13 and rotates with the mounting frame 13.

[0033] Reference Figure 4As shown, a retaining strip 1601 is fixedly provided on the bottom surface of the base 16, and an arc-shaped groove is provided on the side of the support plate 17 near the base 16 to slide with the retaining strip 1601. The cross-sections of the arc-shaped groove and the retaining strip 1601 are both T-shaped.

[0034] Reference Figure 5 As shown, a receiving groove is provided on the slider 15, the second electromagnet is fixed in the receiving groove, and the pull plate 23 is slidably disposed in the receiving groove. A first spring is fixedly disposed between the pull plate 23 and the second electromagnet, and the insertion rod 2301 passes through the slider 15 and slides with it.

[0035] Reference Figure 6 As shown, the base 16 has two through holes at the top, through which the vertical shaft 30 and the vertical shaft 26 pass and rotate with the base 16 via bearings. An annular hole is provided on the inner wall of the through hole, and the coil springs 25 are installed in the annular hole. One end of the two coil springs 25 is fixed to the inner wall of the annular hole, and the other end of the two coil springs 25 is fixed to the vertical shaft 30 and the vertical shaft 26 respectively.

[0036] In actual use, the position of the pressure shaft 8 can be adjusted to adjust the distance between the pressure strip and the positioning shaft 7. Specifically, a mounting base 29 can be arranged below the pressure shaft 8. The top surface of the mounting base 29 is provided with a strip groove, and the bottom end of the pressure shaft 8 is fixedly provided with a protrusion 31 that slides with the strip groove. The cross-section of both the protrusion 31 and the strip groove is T-shaped. A third electromagnet can be installed in the strip groove. The protrusion 31 is made of iron. During the bending process of the pipe 9, the third electromagnet can be de-energized to reduce the pressure of the pressure shaft 8 on the pipe 9. When the third electromagnet is energized, the pressure shaft 8 can approach the positioning shaft 7 and be coaxially arranged with the mounting base 29. In actual use, rubber pads can be wrapped around the outside of the pressure shaft 8 and the positioning shaft 7 to increase the friction between the pressure shaft 8, the positioning shaft 7 and the pipe 9, and to protect the pipe 9.

[0037] Reference Figure 7 As shown, a first groove is provided on the outer circumferential surface of the vertical shaft 30 to slide with the locking block 32, and a spring is fixedly provided between the inner end face of the first groove and the locking block 32.

[0038] Reference Figures 9-10As shown, in actual use, a second groove can be opened on the inner wall of the through hole where the vertical shaft 26 is located. A limit block 35 is slidably installed inside the second groove. The limit block 35 is made of iron, and the end of the limit block 35 near the vertical shaft 26 is an inclined surface 3501. An electromagnet is fixedly installed on the inner end face of the second groove. A return spring is fixedly installed between the electromagnet and the limit block 35. Multiple limit grooves that cooperate with the limit block 35 are opened on the outer circumferential surface of the vertical shaft 26. In the initial state, the limit block 35 is located in the limit groove. When the driven gear 28 drives the vertical shaft 26 to rotate, the cooperation between the limit block 35 and the limit groove can prevent the vertical shaft 26 from reversing. Of course, in specific use, the self-locking of the worm gear 36 and the worm 27 can also achieve this effect. When it is necessary to push the pipe 9 to move, the limit block 35 can be attracted by the electromagnet.

[0039] In actual use, rubber rings can be fixedly embedded on the bottom end face of the positioning shaft 7 and the mounting base 29 to increase the friction between the two and the base 16, so that the positioning shaft 7 and the pressure shaft 8 can remain stable when no external force is applied.

Claims

1. A pipe bending machine, comprising a base and a rotating wheel disposed at the top of the base, a pressure block disposed on the outer side of the rotating wheel, a pipe fitting disposed between the rotating wheel and the pressure block, a positioning shaft and a pressure shaft disposed on one side of the pressure block, a base mounted below the positioning shaft and the pressure shaft, the bottom end face of the base being arc-shaped, and a support plate rotatably mounted below the base, characterized in that: A boss is provided below the pressure block, a connecting block is provided below the boss, a slider is provided below the support plate, an annular groove is provided on the top end face of the base to slide with the slider and the connecting block, and a rotating shaft is provided on the side of the base away from the boss. A limiting component that cooperates with the rotating shaft is provided above the base. When the base rotates around the rotating wheel, the rotating shaft and the limiting component can drive the base to rotate relative to the support plate, thereby causing the pipe to rotate. The base is equipped with a drive assembly that cooperates with the rotating shaft. Multiple bevel racks are provided above the base. A bevel gear that meshes with the bevel rack is fixedly sleeved on the outside of the rotating shaft. When the rotating shaft rotates with the base to the bevel rack, the rotating shaft can drive the positioning shaft and the pressure shaft to rotate relative to each other through the drive assembly.

2. The pipe bending machine according to claim 1, characterized in that: The limiting component includes a lower top plate and an upper top plate disposed above the lower top plate. The upper top plate and the lower top plate are provided with a recess and a protrusion on opposite sides. The rotating shaft passes through the space between the upper top plate and the lower top plate.

3. A pipe bending machine according to claim 2, characterized in that: The bottom end of the positioning shaft is fitted with a vertical shaft via a one-way bearing, and the bottom end of the pressure shaft is fitted with a vertical shaft via a one-way bearing. Both the vertical shaft and the vertical shaft are fitted with coil springs on their outer sides. One end of each coil spring is connected to the vertical shaft and the vertical shaft respectively, and the other end of each coil spring is connected to the base.

4. A pipe bending machine according to claim 3, characterized in that: The drive assembly includes driven gears fixedly sleeved on the outside of the vertical shaft and the outer side of the vertical shaft. The driven gears on the outside of the vertical shaft and the outer side of the vertical shaft mesh with each other. A connecting shaft is rotatably arranged on the side of the base near the rotating shaft. The connecting shaft is connected to the rotating shaft through a universal joint. A worm is fixedly arranged on the end of the connecting shaft away from the rotating shaft. A worm wheel that meshes with the worm is sleeved on the vertical shaft.

5. A pipe bending machine according to claim 4, characterized in that: A locking block is elastically installed on the outer wall of the vertical shaft, and a locking groove that mates with the locking block is opened on the inner wall of the worm gear. A fixing frame is fixedly installed at the bottom of the vertical shaft, and a first electromagnet is fixedly installed at the bottom of the fixing frame. A sliding plate is elastically installed above the first electromagnet, and a pull rope is fixedly installed between the sliding plate and the locking block. The sliding plate is made of iron.

6. A pipe bending machine according to claim 5, characterized in that: A pull plate is installed at the slider, and the pull plate slides with the slider. A second electromagnet is set above the pull plate, and the pull plate elastically engages with the second electromagnet. The pull plate is made of iron. Multiple insertion holes are opened on the bottom surface of the annular groove. An insertion rod that engages with the insertion holes is fixedly set at the bottom of the pull plate. An arc-shaped sliding rod is fixedly set on the side of the connecting block near the slider. The sliding rod passes through the slider and slides with the slider. A baffle is fixedly set at the end of the sliding rod that passes through the slider. A limiting spring is sleeved on the outside of the sliding rod. The limiting spring is located between the baffle and the slider.

7. A pipe bending machine according to claim 1, characterized in that: A retaining strip is fixedly installed on the bottom surface of the base, and an arc-shaped groove is opened on the side of the support plate near the base to slide with the retaining strip. The cross-section of both the arc-shaped groove and the retaining strip is T-shaped.

8. A pipe bending machine according to claim 1, characterized in that: A connecting rod is fixedly installed between the support plate and the slider.

9. A pipe bending machine according to claim 2, characterized in that: An L-shaped bracket is fixedly installed between the upper top plate and the base, and a fixing rod is fixedly installed between the lower top plate and the base.

10. A pipe bending machine according to claim 1, characterized in that: A positioning rod is fixedly installed on the slider. In the initial state, one end of the positioning rod is in contact with the connecting block.

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