A pipe bending machine

Abstract

This invention relates to the field of pipe processing equipment technology and provides a pipe bending machine, including a support, an input shaft, a primary cycloidal wheel, a secondary cycloidal wheel, a bending template, and a rotation drive component. A mounting box is provided at the upper end of the support, and the primary cycloidal wheel is housed within the mounting box. One end of the input shaft is rotatably connected to the mounting box, and the other end is drivenly connected to the input end of the primary cycloidal wheel. The output end of the primary cycloidal wheel is an output shaft, which passes through the secondary cycloidal wheel and is drivenly connected to its input end. The output end of the secondary cycloidal wheel is an output disc, and the end of the output shaft is rotatably connected to the output disc. The bending template is connected to the output disc. A stop wheel is provided at the lower end of the support. The pipe is bent by applying torque through the bending template and by being stopped by the stop wheel. A locking part is provided at the input end of the input shaft, and the rotation drive component engages with the locking part. This structure achieves miniaturization and portability of the pipe bending machine.

Description

Technical Field

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

[0002] Currently, in the fields of pipe installation, repair, and processing, pipe bending is typically accomplished using pipe bending machines. Traditional pipe bending machines are mainly divided into three categories: manual, hydraulic, and electric. Manual pipe bending machines rely on human power to drive a screw or lever mechanism to bend the pipe. While simple in structure, they are labor-intensive, inefficient, and struggle to guarantee bending accuracy. Hydraulic pipe bending machines utilize hydraulic cylinders to provide bending power, capable of outputting significant torque; however, these machines are bulky, the hydraulic system is prone to oil leaks, and maintenance costs are high. Electric pipe bending machines mostly employ gear transmission systems. A motor drives a gear pair to reduce speed and increase torque, which in turn rotates the bending die, thus achieving pipe bending. This type of equipment reduces the labor burden and improves bending efficiency to some extent.

[0003] However, traditional electric pipe bending machines still have the following shortcomings in practical applications: First, their transmission systems generally rely on gear meshing to transmit power. The size and module of the gears directly restrict the compactness of the equipment. Using large-module gears to ensure load-bearing strength leads to thicker teeth and increased gear volume, making the entire machine bulky, heavy, and inconvenient to carry and store. Conversely, using small-module gears to reduce size makes it difficult to meet the requirements of large transmission ratios. Furthermore, rolling and sliding friction during gear meshing, coupled with energy losses from bearings, lubrication, and other auxiliary components, results in low transmission efficiency. Second, most traditional electric pipe bending machines require connection to single-phase or three-phase mains power to operate, heavily relying on fixed power outlets and making them unsuitable for flexible use outdoors, on construction sites, or other locations without power supply facilities. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how to achieve miniaturization and portability of the pipe bending machine while ensuring sufficient bending torque and transmission efficiency.

[0005] This invention provides a pipe bending machine, including a support, an input shaft, a primary cycloidal wheel, a secondary cycloidal wheel, a pipe bending template, and a rotation drive. The upper end of the support is provided with a mounting box, and the primary cycloidal wheel is disposed within the mounting box. One end of the input shaft is rotatably connected to the mounting box, and the other end is drivenly connected to the input end of the primary cycloidal wheel. The output end of the primary cycloidal wheel is an output shaft, which passes through the secondary cycloidal wheel and is drivenly connected to its input end. The output end of the secondary cycloidal wheel is an output disc, and the end of the output shaft is rotatably connected to the output disc. The pipe bending template is connected to the output disc. The lower end of the support is provided with a stop wheel. The pipe is bent by applying torque through the pipe bending template and by being stopped by the stop wheel. The input end of the input shaft is provided with a locking part, and the rotation drive is used to engage with the locking part.

[0006] Optionally, the bending template is a disc-shaped structure, and a template groove is provided on the circumferential edge of the bending template, and a stop hook is provided at the end of the template groove.

[0007] Optionally, multiple template slots are provided, and the dimensions of the multiple template slots are set to be different.

[0008] Optionally, the surface of the bent tube template that connects with the output disk is provided with a circular groove, and the output disk is connected to the bottom of the circular groove through a connector.

[0009] Optionally, the pipe bending machine further includes a plastic bearing sleeve, which is connected between the outer circumferential surface of the needle housing of the secondary cycloidal wheel and the groove wall of the circular groove.

[0010] Optionally, an end cap is connected to the outer end of the mounting box, one end of the input shaft is rotatably connected to the end cap, the end of the output shaft is provided with a groove, and the other end of the input shaft is rotatably connected to the groove.

[0011] Optionally, the pipe bending machine further includes a flange connected between the inner end of the mounting box and the needle housing of the secondary cycloidal wheel.

[0012] Optionally, the pipe bending machine further includes a limiting member that passes through the center of the pipe bending die and is connected to the end of the output shaft, and the limiting member is used to stop the pipe bending die.

[0013] Optionally, the rotation drive is an electric drive or a manual crank, and the output end of the electric drive and the output end of the manual crank are both used to engage with the locking part.

[0014] Optionally, the end face of the bent tube template is provided with an angle scale.

[0015] Compared with related technologies, the pipe bending machine provided by the present invention has the following technical advantages: The pipe bending machine provided by this invention sets a first-stage cycloidal wheel in a mounting box at the upper end of a support, and rotatably connects one end of the input shaft to the mounting box and the other end to the input end of the first-stage cycloidal wheel. This allows the power input from a handheld electric drill or hand crank through a locking part to undergo a first-stage high-ratio reduction and torque increase via the first-stage cycloidal wheel. Furthermore, by passing the output shaft of the first-stage cycloidal wheel through a second-stage cycloidal wheel and drivingly connecting it to its input end, and rotatably connecting the end of the output shaft to the output disc of the second-stage cycloidal wheel, the power can enter the second-stage cycloidal wheel for a second-stage reduction and torque increase. The two-stage cycloidal transmission, connected in series, can achieve an extremely high overall transmission ratio within a very small volume, thereby significantly reducing the axial and radial dimensions of the transmission system while ensuring sufficient bending torque. Finally, by directly connecting the bending die to the output disc and setting a stop wheel at the lower end of the support, when the output disc drives the bending die to rotate, the pipe is subjected to bending torque by the bending die and forms a stop point by relying on the stop wheel, thus completing precise pipe bending. The above structure eliminates the bulky and heavy problem caused by large-module gears in traditional gear transmission systems, and also avoids the defects of insufficient transmission ratio and large friction loss of small-module gears. At the same time, since the snap-fit ​​part at the end of the input shaft can be adapted to portable power tools such as handheld electric drills or manual cranks, it does not need to rely on mains power sockets, truly realizing the miniaturization and portability of the pipe bending machine, and solving the technical problems of large equipment size, low transmission efficiency and reliance on fixed power supply in traditional technology. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the pipe bending machine according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the pipe bending machine according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a cross-sectional structural diagram of the pipe bending machine according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 10-Support, 11-Mounting box, 12-Stop wheel, 13-End cover, 20-Input shaft, 21-Snap-fit ​​part, 30-First-stage cycloidal wheel, 31-Output shaft, 40-Second-stage cycloidal wheel, 41-Output disc, 50-Bend tube template, 51-Template groove, 52-Stop hook, 53-Angle dial, 60-Plastic bearing sleeve, 70-Flange, 80-Limiting element, 90-Manual crank. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0020] In the description of this invention, the orientations or positional relationships indicated by terms such as "up," "down," "left," "right," "top," "bottom," "front," "back," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this invention. They are not intended to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or implementation of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0023] like Figures 1 to 3As shown, this embodiment of the invention provides a pipe bending machine, including a support 10, an input shaft 20, a primary cycloidal wheel 30, a secondary cycloidal wheel 40, a pipe bending template 50, and a rotation drive component. The upper end of the support 10 is provided with a mounting box 11, and the primary cycloidal wheel 30 is disposed within the mounting box 11. One end of the input shaft 20 is rotatably connected to the mounting box 11, and the other end is drivenly connected to the input end of the primary cycloidal wheel 30. The output end of the primary cycloidal wheel 30 is an output shaft 31, which passes through the secondary cycloidal wheel 40. The first-stage cycloidal wheel 40 is driven and connected to the input end of the second-stage cycloidal wheel 40. The output end of the second-stage cycloidal wheel 40 is an output disk 41. The end of the output shaft 31 is rotatably connected to the output disk 41. The bending template 50 is connected to the output disk 41. The lower end of the support 10 is provided with a stop wheel 12. The pipe is bent by applying torque through the bending template 50 and by the stop wheel 12. The input end of the input shaft 20 is provided with a snap-fit ​​part 21. The rotation drive is used to snap-fit ​​with the snap-fit ​​part 21.

[0024] It should be noted that both the first-stage cycloidal wheel 30 and the second-stage cycloidal wheel 40 adopt a cycloidal pinwheel transmission structure. The input end of the first-stage cycloidal wheel 30 refers to its internal eccentric shaft, with the input shaft 20 coaxially fixed or integrally formed with this eccentric shaft. The output shaft 31 of the first-stage cycloidal wheel 30 refers to the output shaft in its output mechanism, which also serves as the input eccentric shaft of the second-stage cycloidal wheel 40. The end of the output shaft 31 is rotatably connected to the center hole of the output disk 41 via a rolling bearing (such as a needle roller bearing or a deep groove ball bearing), allowing relative rotation between the output shaft 31 and the output disk 41. This ensures that the high-speed rotation of the first-stage output shaft does not interfere with the low-speed output of the second-stage output disk. This arrangement also shortens the axial distance, and the output shaft 31 provides rotational support for the second-stage cycloidal wheel 40, resulting in a more compact and reasonable overall structure. The rotation drive can be a handheld cordless drill, an electric screwdriver, or a manual crank handle 90, with an interface (such as a hexagonal, square, or spline interface) at its output end that matches the snap-fit ​​part 21.

[0025] Specifically, as an optional connection method, the input shaft 20 and the eccentric shaft of the first-stage cycloidal wheel 30 can be circumferentially fixed by a flat key, spline, or interference fit. The output shaft 31 is connected to the cycloidal wheel inside the needle housing of the second-stage cycloidal wheel 40 by a pin-type output mechanism. The second-stage cycloidal wheel 40 is sleeved on the eccentric shaft section of the output shaft 31. The second-stage cycloidal wheel 40 performs planar motion within its needle housing, and outputs its rotational motion through the pin hole and pin shaft on the output disc 41. A set of rolling bearings is provided between the end of the output shaft 31 and the output disc 41. The inner ring of the bearing is interference-fitted with the output shaft 31, and the outer ring is interference-fitted with the center hole of the output disc 41. The lower end of the support 10 is provided with one or more retaining wheels 12. The outer circumferential surface of the retaining wheel 12 is provided with an arc-shaped groove to accommodate the tube and prevent lateral slippage.

[0026] In this embodiment, by placing the first-stage cycloidal wheel 30 inside the mounting box 11 at the upper end of the support 10, and rotatably connecting one end of the input shaft 20 to the mounting box 11 and drivingly connecting the other end to the input end of the first-stage cycloidal wheel 30, the power input by the hand-held electric drill or hand crank 90 and other rotating drive components through the locking part 21 can undergo a first large transmission ratio reduction and torque increase via the first-stage cycloidal wheel 30; furthermore, by passing the output shaft 31 of the first-stage cycloidal wheel 30 through the second-stage cycloidal wheel 40 and drivingly connecting it to its input end, and rotatably connecting the end of the output shaft 31 to the second-stage cycloidal wheel 40... The output disc 41 of the cycloidal wheel 40 allows power to enter the secondary cycloidal wheel 40 for a second reduction and torque increase. The two-stage cycloidal transmission, connected in series, achieves an extremely high overall transmission ratio within a very small volume, thus significantly reducing the axial and radial dimensions of the transmission system while ensuring sufficient bending torque. Furthermore, by directly connecting the bending template 50 to the output disc 41 and setting a stop wheel 12 at the lower end of the support 10, when the output disc 41 drives the bending template 50 to rotate, the pipe is subjected to bending torque by the bending template 50 and forms a stop fulcrum by relying on the stop wheel 12, thereby completing precise pipe bending. The above structure eliminates the bulky and cumbersome problem caused by large-module gears in traditional gear transmission systems, and also avoids the defects of insufficient transmission ratio and high friction loss of small-module gears. At the same time, since the snap-fit ​​part 21 at the end of the input shaft 20 can be adapted to portable power tools such as handheld electric drills or manual crank handles 90, it does not need to rely on a mains power socket, truly realizing the miniaturization and portability of the pipe bending machine, and solving the technical problems of large equipment size, low transmission efficiency, and reliance on fixed power supply in traditional technology.

[0027] Optionally, such as Figure 2 and Figure 3 As shown, the bending tube template 50 has a disc-shaped structure, and a template groove 51 is provided on the circumferential edge of the bending tube template 50. A stop hook 52 is provided at the end of the template groove 51.

[0028] Specifically, the cross-sectional shape of the template groove 51 can be set to semi-circular, V-shaped, or U-shaped to accommodate pipes with different cross-sectional shapes (such as round pipes, square pipes, or copper pipes). The stop hook 52 can be a protrusion extending radially outward from the end of the template groove 51, or it can be a hook-shaped part independently installed on the end face of the bending template 50, with its height slightly higher than the end face of the template groove 51, used to hook the pipe end at the beginning of the bend to prevent the pipe from slipping. The position of the stop hook 52 can be set at the clockwise or counterclockwise end of the template groove 51 according to the needs of the bending direction.

[0029] In this embodiment, by setting a disc-shaped bending template 50 and providing a template groove 51 and a stop hook 52 on its circumferential edge, the pipe can be stably fitted into the template groove 51. The stop hook 52 provides radial constraint in the initial stage of bending, preventing the pipe from slipping off along the template groove 51 due to bending torque. This structure ensures that the relative position between the pipe and the template remains constant during the bending process, thereby improving the repeatability of the bending angle and the consistency of the finished product.

[0030] Optionally, such as Figure 2 and Figure 3 As shown, multiple template grooves 51 are provided, and the dimensions of the multiple template grooves 51 are set differently.

[0031] Specifically, multiple template slots 51 can be arranged at intervals along the circumference of the bending template 50, with the radius of each template slot 51 corresponding to a commonly used pipe diameter (such as 6mm, 8mm, 10mm, 12mm, etc.). Alternatively, multiple template slots 51 of different depths can be set at the same circumferential position of the bending template 50, and different pipe diameters can be adapted by changing different slot positions. As an alternative, the bending template 50 can be designed as a replaceable module, with template slots of different specifications machined on different template plates and connected to the output plate 41 through a quick-change interface.

[0032] In this embodiment, by setting multiple template slots 51 of different sizes, the same pipe bending template 50 can adapt to the bending needs of multiple pipe diameters, without the need to replace the template separately for each pipe diameter, which significantly improves the versatility and ease of operation of the equipment and further enhances the on-site applicability of the portable pipe bending machine.

[0033] Optionally, such as Figure 2 and Figure 3 As shown, the surface of the bent tube template 50 that connects with the output disk 41 is provided with a circular groove, and the output disk 41 is connected to the bottom of the circular groove through a connector.

[0034] Specifically, the depth of the circular groove matches the thickness of the output disk 41, allowing the output disk 41 to be fully or partially submerged within the groove, thereby shortening the axial distance between the bending template 50 and the secondary cycloidal wheel 40. The connecting components can be countersunk screws, hex socket head cap screws, or rivets, preferably 3 to 6 screws evenly distributed circumferentially to ensure balanced torque transmission. A positioning stop can be provided at the bottom of the circular groove, engaging with the boss on the end face of the output disk 41 to achieve automatic centering.

[0035] In this embodiment, by opening a circular groove on the surface where the bending template 50 and the output disk 41 are connected, and fixing the output disk 41 to the bottom of the circular groove through a connector, a reliable coaxial connection between the bending template 50 and the output disk 41 is achieved on the one hand, and the output disk 41 is embedded inside the bending template 50 on the other hand, reducing the overall axial length, making the whole structure more compact, and facilitating storage and carrying.

[0036] Optionally, such as Figure 3 As shown, the pipe bending machine also includes a plastic bearing sleeve 60, which is connected between the outer circumferential surface of the needle shell of the secondary cycloidal wheel 40 and the groove wall of the circular groove.

[0037] Specifically, the plastic bearing sleeve 60 can be made of self-lubricating materials such as polyoxymethylene (POM), nylon (PA), or polytetrafluoroethylene (PTFE). The inner bore of the plastic bearing sleeve 60 and the outer circumferential surface of the needle housing of the secondary cycloidal wheel 40 can be fixed by interference fit or bonding, while the outer circumferential surface and the groove wall can be set to clearance fit and lubricated with grease. Alternatively, the plastic bearing sleeve 60 can be entirely replaced with a needle roller bearing or a sliding bearing, but the plastic bearing sleeve has the advantages of being lightweight, requiring no additional lubrication, and providing shock absorption and noise reduction.

[0038] In this embodiment, by setting a plastic bearing sleeve 60 between the outer circumferential surface of the needle shell of the secondary cycloidal wheel 40 and the groove wall of the circular groove, the bending tube template 50 can rotate flexibly relative to the needle shell of the secondary cycloidal wheel 40. At the same time, the plastic bearing sleeve 60 absorbs the radial force and vibration between the needle shell and the bending tube template, reduces the direct friction between metal parts, extends the equipment life, and further reduces the overall weight, which is in line with the portable design concept.

[0039] Optionally, such as Figure 1 and Figure 3 As shown, an end cap 13 is connected to the outer end of the mounting box 11, one end of the input shaft 20 is rotatably connected to the end cap 13, the end of the output shaft 31 is provided with a groove, and the other end of the input shaft 20 is rotatably connected to the groove.

[0040] Specifically, the end cap 13 is fixed to the outer end of the mounting box 11 by bolts or clips. One end of the input shaft 20 is rotatably connected to the center hole of the end cap 13 via a deep groove ball bearing or an oil-impregnated bearing. The groove at the end of the output shaft 31 is a cylindrical blind hole, and a rolling bearing or wear-resistant bushing is also provided in the groove. The other end of the input shaft 20 extends into the groove and mates with the inner ring of the bearing. This "two-end support" structure gives the input shaft 20 better rigidity and reduces flexural deformation.

[0041] In this embodiment, by rotatably connecting one end of the input shaft 20 to the end cover 13 and the other end to the groove at the end of the output shaft 31, double-end support of the input shaft 20 is achieved, effectively preventing the input shaft 20 from jumping or becoming eccentric during high-speed rotation and improving transmission smoothness. Simultaneously, the groove structure of the output shaft 31 provides an additional positioning reference for the input shaft, ensuring the coaxiality between the first-stage cycloidal wheel 30 and the second-stage cycloidal wheel 40, thereby improving the overall bending accuracy of the machine.

[0042] Optionally, such as Figure 1 and Figure 3 As shown, the pipe bending machine also includes a flange 70, which is connected between the inner end of the mounting box 11 and the needle housing of the secondary cycloidal wheel 40.

[0043] Specifically, flange 70 has an annular disc structure, with its inner edge fixedly connected to the inner end face of mounting box 11 by bolts, and its outer edge fixedly connected to the needle shell end face of secondary cycloidal wheel 40 by bolts. A through hole for output shaft 31 to pass through is provided in the center of flange 70. Alternatively, flange 70 can be integrally cast with mounting box 11 or secondary needle shell to simplify assembly.

[0044] In this embodiment, by setting a flange 70 between the inner end of the mounting box 11 and the needle housing of the secondary cycloidal wheel 40, the primary transmission module (inside the mounting box 11) and the secondary transmission module (secondary needle housing) are rigidly connected as one unit, ensuring the relative positional accuracy and overall rigidity between the two transmission stages. The flange 70 also serves as a seal and dustproof, preventing external debris from entering the transmission mechanism.

[0045] Optionally, such as Figure 2 and Figure 3 As shown, the pipe bending machine also includes a limiting member 80, which passes through the center of the pipe bending template 50 and is connected to the end of the output shaft 31, and the limiting member 80 is used to stop the pipe bending template 50.

[0046] Specifically, the limiting member 80 can be a central screw, whose shank passes through the central through hole of the bending template 50 and screws into the threaded hole at the end of the output shaft 31. The head diameter of the limiting member 80 is larger than the diameter of the central hole of the bending template 50, thus forming an axial stop. A washer (such as a spring washer or a flat washer) can be provided between the limiting member 80 and the bending template 50 to prevent friction and loosening. It should be noted that the limiting member 80 only provides axial limiting and does not transmit circumferential torque; the circumferential rotation of the bending template 50 is entirely driven by the output disc 41 through the connecting piece.

[0047] In this embodiment, a limiting member 80 passes through the center of the bent tube template 50 and is connected to the end of the output shaft 31, thereby restricting the axial movement of the bent tube template 50 onto the output shaft 31 and preventing the bent tube template 50 from falling off the output disk 41 during operation. Simultaneously, since the limiting member 80 does not bear circumferential shear force and only serves an axial limiting function, smaller screws can be used, saving space. This structure is simple, reliable, easy to assemble and disassemble, and facilitates users in replacing bent tube templates of different specifications.

[0048] Optionally, such as Figures 1 to 3 As shown, the rotation drive is an electric drive or a manual crank 90, and the output end of the electric drive and the output end of the manual crank 90 are both used to engage with the locking part.

[0049] Specifically, the electric drive unit is preferably a handheld cordless drill or a cordless electric screwdriver, with a standard hexagonal or square shank output end that fits into the internal hexagonal or square hole of the locking part 21. The manual crank 90 is an L-shaped crank, with a connector at one end that matches the locking part 21 and a handle at the other end. The lever arm length of the manual crank 90 can be designed as needed. Alternatively, the locking part 21 can also be an external hexagonal head that inserts directly into the drill chuck.

[0050] In this embodiment, by setting the rotation drive to either an electric drive or a manual crank handle 90, and ensuring that the output ends of both can engage with the locking part 21, the user can flexibly choose the power source according to the actual usage scenario. An electric drill can be used when charging is available or when rapid batch pipe bending is required, while the manual crank handle 90 can be used outdoors when there is no power or only a small number of pipe bends are needed. This dual-mode drive design completely eliminates the dependence on mains power outlets, greatly expanding the application scenarios of the pipe bending machine and further improving its flexibility and portability.

[0051] Optionally, such as Figure 1 and Figure 3 As shown, the end face of the bent tube template 50 is provided with an angle scale 53.

[0052] Specifically, the angle dial 53 can be set on the end face of the bending template 50 by laser engraving, printing, or affixing a label. The zero-degree scale line of the angle dial 53 is aligned with the starting position of the bending template 50, and the scale range is typically 0° to 180° or 0° to 360°. Alternatively, a pointer can be set on the support 10, which indicates the current bending angle when the bending template 50 rotates.

[0053] In this embodiment, by setting an angle scale 53 on the end face of the bending template 50, the operator can directly read the current bending angle of the pipe, achieving precise pipe bending without the need for additional measuring tools. The angle scale 53 rotates synchronously with the bending template 50, providing intuitive readings. It is particularly suitable for batch operations that require repeated bending of the same angle, improving work efficiency and pipe bending consistency.

[0054] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A pipe bending machine, characterized in that, The system includes a support (10), an input shaft (20), a first-stage cycloidal wheel (30), a second-stage cycloidal wheel (40), a pipe bending template (50), and a rotation drive component. The upper end of the support (10) is provided with a mounting box (11). The first-stage cycloidal wheel (30) is disposed within the mounting box (11). One end of the input shaft (20) is rotatably connected to the mounting box (11), and the other end is drivenly connected to the input end of the first-stage cycloidal wheel (30). The output end of the first-stage cycloidal wheel (30) is an output shaft (31), which passes through the second-stage cycloidal wheel (40) and... The secondary cycloidal wheel (40) is driven and connected to the input end of the secondary cycloidal wheel (40). The output end of the secondary cycloidal wheel (40) is an output disk (41). The end of the output shaft (31) is rotatably connected to the output disk (41). The bending template (50) is connected to the output disk (41). The lower end of the support (10) is provided with a stop wheel (12). The pipe is bent by applying torque through the bending template (50) and by blocking through the stop wheel (12). The input end of the input shaft (20) is provided with a snap-fit ​​part (21). The rotation drive is used to snap-fit ​​with the snap-fit ​​part (21).

2. The pipe bending machine according to claim 1, characterized in that, The bending template (50) has a disc-shaped structure. The circumferential edge of the bending template (50) is provided with a template groove (51), and the end of the template groove (51) is provided with a stop hook (52).

3. The pipe bending machine according to claim 2, characterized in that, Multiple template slots (51) are provided, and the dimensions of the multiple template slots (51) are set differently.

4. The pipe bending machine according to claim 1, characterized in that, The surface where the bent tube template (50) connects to the output disk (41) is provided with a circular groove, and the output disk (41) is connected to the bottom of the circular groove through a connector.

5. The pipe bending machine according to claim 4, characterized in that, The pipe bending machine also includes a plastic bearing sleeve (60), which is connected between the outer circumferential surface of the needle shell of the secondary cycloidal wheel (40) and the groove wall of the circular groove.

6. The pipe bending machine according to claim 1, characterized in that, An end cap (13) is connected to the outer end of the mounting box (11). One end of the input shaft (20) is rotatably connected to the end cap (13). A groove is provided at the end of the output shaft (31). The other end of the input shaft (20) is rotatably connected to the groove.

7. The pipe bending machine according to claim 1, characterized in that, The pipe bending machine also includes a flange (70), which is connected between the inner end of the mounting box (11) and the needle housing of the secondary cycloidal wheel (40).

8. The pipe bending machine according to claim 1, characterized in that, The pipe bending machine also includes a limiting member (80), which passes through the center of the pipe bending template (50) and is connected to the end of the output shaft (31), and the limiting member (80) is used to stop the pipe bending template (50).

9. The pipe bending machine according to claim 1, characterized in that, The rotation drive is an electric drive or a manual crank (90), and the output end of the electric drive and the output end of the manual crank (90) are both used to engage with the locking part.

10. The pipe bending machine according to claim 1, characterized in that, An angle scale (53) is provided on the end face of the bending tube template (50).

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