Pipe bending machine for machining automobile seat framework

Abstract

The utility model relates to the technical field of framework machining, in particular to a pipe bending machine for machining an automobile seat framework, the bottom of a frame body is fixedly connected with a driving motor through bolts, the bottom end of a rotating rod penetrates through the bottom of the frame body and is in transmission connection with an output shaft of the driving motor, and the top end of a bearing sleeve is fixedly connected with a first annular plate; an inner rod is arranged on the inner side of the bearing sleeve, a second annular plate is fixedly connected to the top end of the inner rod, a bearing ring is slidably connected to the inner side of the frame body, a hydraulic oil cylinder is fixedly connected to one side of the top of the bearing ring through a bolt, and a bearing cylinder is fixedly connected to an output shaft of the hydraulic oil cylinder; by arranging the adjustable inner rod, the combined structure of the first annular plate and the second annular plate and the double-arc-shaped clamping plate clamping system driven by the air cylinder, rapid clamping and self-adaptive clamping of pipes with various diameters are achieved, frequent die replacement or clamp re-disassembly and re-assembly are not needed, and the applicability and production continuity of equipment are greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of skeleton processing technology, and in particular to a tube bending machine for processing automobile seat skeletons. Background Technology

[0002] The automotive seat frame is the core load-bearing component of the automotive seat structure. Its main function is to provide structural support for the seat and ensure the safety and comfort of the occupants. Frame processing is particularly critical in the automotive seat manufacturing process, especially the tube bending process, which directly affects the overall strength, dimensional accuracy, and assembly performance of the seat. Therefore, automotive seat frame processing places high demands on the adaptability of equipment, processing precision, and production efficiency. Tube bending machines for automotive seat frame processing occupy an important position in the automotive parts manufacturing industry. As a key step in metal tube forming, their processing performance has a decisive impact on the overall quality, structural stability, and safety of the automotive seat frame. Especially in the core process of tube bending, existing tube bending equipment has gradually revealed a series of obvious limitations and technical problems when handling frame tubes of different diameters.

[0003] Specifically, existing pipe bending equipment faces prominent problems in actual operation, such as poor adaptability, complex adjustment, and low processing efficiency. Utility model patent CN210475285U discloses a pipe bending machine for processing automotive seat frames, including a fixed platform and a vertical box. The fixed platform is equipped with a hydraulic cylinder and a symmetrical first rotating shaft, with a sleeve fitted onto the first rotating shaft. The vertical box includes a storage cavity and a conveying cavity near the fixed platform, with an opening between the conveying cavity and the storage cavity. An inclined plate facing the opening is installed inside the storage cavity, and a geared switch mechanism controlling the opening and closing of the opening is located below the storage cavity. A pallet is installed inside the conveying cavity, with a discharge port and a traction lifting mechanism connected to the pallet at the top. The traction lifting mechanism includes a drive motor located at the top of the conveying cavity, a pull rope between the drive motor and the pallet, and several sliding components between the pallet and the conveying cavity. While this device solves the problem of existing pipe bending machines lacking automatic metal pipe storage, it still has significant shortcomings when bending frame pipes of different diameters.

[0004] In actual processing, existing pipe bending machines use fixed clamping structures and bending dies, which cannot be quickly changed or adjusted to adapt to various pipe specifications. This necessitates stopping the machine to disassemble and reinstall the corresponding clamps and dies every time the pipe diameter is changed, severely impacting production continuity and processing efficiency. Furthermore, the lack of an adaptive adjustment system for different pipe diameters requires operators to rely on manual experience to repeatedly adjust equipment parameters, increasing labor intensity and increasing the risk of quality problems such as pipe bending angle deviation, wrinkling, or breakage due to improper adjustments, thus affecting yield and product consistency. Therefore, to address the numerous shortcomings of existing technology, we urgently need an innovative pipe bending machine for automotive seat frame processing to solve these problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pipe bending machine for processing automotive seat frames, which solves the problem that the clamping structure and pipe bending mold of the existing pipe bending machine are fixed, making it impossible to quickly replace or adjust to adapt to various specifications of pipes. This results in the need to stop the machine to disassemble and reinstall the corresponding clamps and molds every time the pipe diameter is changed, which seriously affects the continuity of production and processing efficiency.

[0006] To achieve the above objectives, this utility model provides a pipe bending machine for processing automotive seat frames, including a frame, and a rotating rod rotatably connected to the inner side of the frame, with a bearing sleeve fixedly connected to the top of the rotating rod;

[0007] A drive motor is bolted to the bottom of the frame, and the bottom end of the rotating rod passes through the bottom of the frame and is connected to the output shaft of the drive motor. A first annular plate is fixedly connected to the top of the bearing sleeve, and an inner rod is provided on the inner side of the bearing sleeve. A second annular plate is fixedly connected to the top of the inner rod. A bearing ring is slidably connected to the inner side of the frame, and a hydraulic cylinder is bolted to one side of the top of the bearing ring. A bearing cylinder is fixedly connected to the output shaft of the hydraulic cylinder. Arc-shaped clamps are provided on both sides of the inner side of the bearing cylinder, and cylinders are bolted to both sides of the bearing cylinder. The output shafts of the two cylinders pass through the side wall of the bearing cylinder and are fixedly connected to one side of the two arc-shaped clamps respectively.

[0008] One side of the frame has a side groove, and an arc-shaped bearing plate is fixedly connected to the inside of the side groove.

[0009] The bearing sleeve has a plug rod on one side, and both the bearing sleeve and the inner rod have slots for use with the plug rod. The inner rod also has several slots.

[0010] The bottom two sides of the bearing ring are fixedly connected with protrusions, and the two protrusions are slidably connected to the inner bottom of the frame through an annular groove.

[0011] One side of the bearing cylinder is detachably connected to a connecting plate, and one side of the connecting plate is fixedly connected to a support rod.

[0012] The connecting plate has threaded rods on both sides, and the two threaded rods pass through the connecting plate and one side of the bearing cylinder in sequence through the threaded grooves.

[0013] This utility model discloses a pipe bending machine for processing automotive seat frames. Addressing the problem that existing pipe bending equipment cannot quickly adapt to different pipe diameters, this utility model achieves rapid clamping and adaptive clamping of pipes of various diameters by incorporating an adjustable inner rod, a combination structure of a first and second annular plate, and a cylinder-driven double-arc clamping system. This eliminates the need for frequent mold changes or fixture reassembly, significantly improving the equipment's applicability and production continuity. Secondly, the hydraulic cylinder-controlled height adjustment function of the bearing cylinder ensures that the clamping center and bending fulcrum remain aligned, improving bending accuracy and consistency and avoiding quality problems such as angle errors, wrinkling, or breakage caused by height deviations. Furthermore, the structural design of the drive motor coordinating the rotating rod and the bearing sleeve, combined with the sliding guide effect of the bearing ring, not only enhances the overall operational stability but also improves the automation level and ease of operation, reducing the frequency of manual adjustments and labor intensity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall main view structure of an embodiment of this utility model.

[0016] Figure 2 This is a side view structural diagram of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the bearing sleeve structure according to an embodiment of the present utility model.

[0018] Figure 4 This is a schematic diagram of the second annular plate structure according to an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the main structure of the support cylinder according to an embodiment of the present utility model.

[0020] Figure 6 This is a schematic diagram of the inner structure of the bearing cylinder according to an embodiment of the present invention.

[0021] 1. Frame; 2. Bearing sleeve; 3. First annular plate; 4. Second annular plate; 5. Inner rod; 6. Insert rod; 7. Slot; 8. Drive motor; 9. Bearing ring; 10. Protrusion; 11. Annular groove; 12. Side groove; 13. Arc-shaped bearing plate; 14. Bearing cylinder; 15. Hydraulic cylinder; 16. Rotating rod; 17. Connecting plate; 18. Threaded rod; 19. Cylinder; 20. Arc-shaped clamping plate; 21. Support rod. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figure 1-6 A tube bending machine for processing automotive seat frames includes a frame 1, a rotating rod 16 rotatably connected to the inner side of the frame 1, and a bearing sleeve 2 fixedly connected to the top of the rotating rod 16; a drive motor 8 is fixedly connected to the bottom of the frame 1 by bolts, and the bottom end of the rotating rod 16 passes through the bottom of the frame 1 and is connected to the output shaft of the drive motor 8 for transmission; a first annular plate 3 is fixedly connected to the top of the bearing sleeve 2, and an inner rod 5 is provided on the inner side of the bearing sleeve 2, with a second annular plate 4 fixedly connected to the top of the inner rod 5; a bearing ring 9 is slidably connected to the inner side of the frame 1, and a hydraulic cylinder 15 is fixedly connected to one side of the top of the bearing ring 9 by bolts; a bearing cylinder 14 is fixedly connected to the output shaft of the hydraulic cylinder 15; arc-shaped clamping plates 20 are provided on both sides of the inner side of the bearing cylinder 14, and cylinders 19 are fixedly connected to both sides of the bearing cylinder 14 by bolts; and the output shafts of the two cylinders 19 pass through the side wall of the bearing cylinder 14 and are fixedly connected to one side of the two arc-shaped clamping plates 20 respectively.

[0024] First, the metal skeleton tube to be bent is inserted from one side of the frame 1. By adjusting the vertical position of the inner rod 5 inside the bearing sleeve 2, the distance between the first annular plate 3 and the second annular plate 4 is adjusted to accommodate skeleton tubes of different diameters. Then, the hydraulic cylinder 15 is activated, driving the bearing cylinder 14, which is fixedly connected to its output shaft, to move up and down. This ensures that the central axis of the bearing cylinder 14 is aligned with the center between the first annular plate 3 and the second annular plate 4, guaranteeing the accuracy of subsequent clamping and bending operations. Next, one end of the skeleton tube is passed through the channel between the first annular plate 3 and the second annular plate 4 and inserted into the bearing cylinder 14. Then, the cylinders 19 installed on both sides of the bearing cylinder 14 are activated. The output shafts of the two cylinders 19 push the two arc-shaped clamping plates 20 towards the center, thus firmly clamping the skeleton tube and preventing displacement or slippage during bending due to insecure clamping. After completing the above preparations, the drive motor 8, fixed at the bottom of the frame 1, is started. Its output shaft drives the rotating rod 16 to rotate through the transmission structure, and the bearing sleeve 2, fixedly connected to the top of the rotating rod 16, also rotates synchronously. Since one end of the skeleton tube is clamped by the arc-shaped clamping plate 20 and rotates together with the bearing cylinder 14, while the other end is supported and limited by the first annular plate 3 and the second annular plate 4, during the rotation of the bearing sleeve 2, the first annular plate 3 and the second annular plate 4 will move the bent part of the skeleton tube, causing it to complete the bending and forming operation according to the predetermined trajectory. During the entire bending process, the bearing ring 9 slides inside the frame 1, providing a stable support structure for the bearing cylinder 14 and the hydraulic cylinder 15, ensuring the stability and safety of the equipment during operation.

[0025] Furthermore, a side groove 12 is provided on one side of the frame 1, and an arc-shaped bearing plate 13 is fixedly connected to the inner side of the side groove 12. When the metal skeleton tube is inserted from one side of the frame 1, the arc-shaped bearing plate 13 provides a stable support surface for the tube, ensuring that the tube will not shift or slide before entering between the first annular plate 3 and the second annular plate 4, thereby improving the positioning accuracy and operational stability of the tube.

[0026] Furthermore, one side of the bearing sleeve 2 is provided with an insertion rod 6, and both one side of the bearing sleeve 2 and one side of the inner rod 5 are provided with slots 7 for use with the insertion rod 6. Several slots 7 are provided on the inner rod 5. By adjusting the insertion rod 6 to be inserted into different positions of the slots 7, the height of the inner rod 5 inside the bearing sleeve 2 can be easily adjusted to accommodate pipes of different diameters. This design simplifies the pipe diameter adjustment process, allowing for quick adjustment without complex tools, thus improving equipment adaptability and ease of operation.

[0027] Furthermore, both sides of the bottom of the bearing ring 9 are fixedly connected with protrusions 10, and both protrusions 10 are slidably connected to the inner bottom of the frame 1 through the annular groove 11. When the hydraulic cylinder 15 drives the bearing cylinder 14 to move up and down, the protrusions 10 slide along the annular groove 11, providing additional guidance and stability support, preventing the bearing cylinder 14 from shaking or tilting during the lifting process, thereby enhancing the stability and safety of the equipment operation.

[0028] Furthermore, a connecting plate 17 is detachably connected to one side of the bearing cylinder 14, and a support rod 21 is fixedly connected to one side of the connecting plate 17. The combined structure of the connecting plate 17 and the support rod 21 enhances the overall rigidity of the bearing cylinder 14, enabling it to withstand greater forces without deformation during clamping and bending. At the same time, the detachable design facilitates maintenance and replacement of worn parts, thereby improving the durability and maintenance convenience of the equipment.

[0029] Furthermore, threaded rods 18 are provided on both sides of the connecting plate 17, and both threaded rods 18 pass through the connecting plate 17 and one side of the bearing cylinder 14 via threaded grooves. The threaded rods 18 are not only used to fix the connecting plate 17 and the bearing cylinder 14, but also to finely adjust the position of the connecting plate 17 as needed, thereby adjusting the support angle and force of the support rod 21 on the bearing cylinder 14. This ensures that the bearing cylinder 14 maintains its optimal state during clamping and bending, achieving the effect of optimizing equipment performance and improving processing accuracy. In addition, this fastening method is simple, reliable, and easy to operate, further enhancing the practicality and reliability of the equipment.

[0030] In summary:

[0031] When bending metal tubing for automotive seat frames, the operator first inserts the tubing into one side of the frame 1. Since the frame 1 has a side groove 12 with an arc-shaped support plate 13 fixedly connected to its inner side, it provides an initial support surface for the tubing, ensuring it doesn't shift or slide when entering the equipment. Then, the diameter of the tubing is adjusted using the mating structure of the insertion rod 6 and slots 7. The insertion rod 6 is located on one side of the support sleeve 2, while both the inner rod 5 and the support sleeve 2 have multiple slots 7. By inserting the insertion rod 6 into different slots 7, the height of the inner rod 5 can be quickly adjusted, thereby moving the second annular plate 4 up and down to match the distance between it and the first annular plate 3 to the current tube diameter. After adjusting the tube diameter, the hydraulic cylinder 15 is activated, and its output shaft moves the support cylinder 14 up and down, ensuring that the central axis of the support cylinder 14 is on the same horizontal line as the center between the first annular plate 3 and the second annular plate 4, guaranteeing the accuracy of the clamping and bending actions. The bearing ring 9 is slidably connected inside the frame 1, and has protrusions 10 on both sides of its bottom. These two protrusions 10 slide with the bottom inner side of the frame 1 through annular grooves 11, playing a guiding and stabilizing role during the lifting and lowering of the bearing cylinder 14 driven by the hydraulic cylinder 15, preventing the bearing cylinder 14 from shaking or tilting, and improving operational stability. Next, one end of the skeleton tube passes through the channel between the first annular plate 3 and the second annular plate 4 and extends into the bearing cylinder 14. Then, the cylinders 19 installed on both sides of the bearing cylinder 14 are activated. The output shafts of the two cylinders 19 push the arc-shaped clamping plate 20 to move towards the middle, thereby firmly clamping the skeleton tube and preventing displacement or slippage due to insecure clamping during bending. To further enhance the structural strength of the bearing cylinder 14, one side of the bearing cylinder 14 is detachably connected to the connecting plate 17 through a threaded rod 18, and the other side of the connecting plate 17 is fixedly connected to a support rod 21. This combined structure not only improves the overall rigidity of the bearing cylinder 14, but also allows for convenient disassembly and replacement of worn parts when needed, improving equipment maintenance efficiency. After completing the above preparations, the drive motor 8, which is fixed to the bottom of the frame 1 and secured with bolts, is started. Its output shaft drives the rotating rod 16 to rotate through the transmission structure, and the bearing sleeve 2, which is fixedly connected to the top of the rotating rod 16, also rotates synchronously. Since one end of the skeleton tube is clamped by the arc-shaped clamping plate 20 and moves together with the bearing cylinder 14, while the other end is limited and supported by the first annular plate 3 and the second annular plate 4, during the rotation of the bearing sleeve 2, the first annular plate 3 and the second annular plate 4 will move the bent part of the skeleton tube, completing the bending and forming operation according to the predetermined trajectory.Throughout the bending process, all components of the equipment work collaboratively, resulting in a stable and reliable structure capable of adapting to the processing needs of various pipe diameters. This significantly improves production efficiency and product consistency. The adjustable structure composed of the bearing sleeve 2, inner rod 5, first annular plate 3, and second annular plate 4, along with the double-arc clamping system driven by cylinder 19, enables rapid clamping and adaptive clamping of skeleton pipes of different diameters. This eliminates the need for frequent mold changes or fixture reassembly, greatly enhancing the equipment's applicability and production continuity. Secondly, the height adjustment function of the bearing cylinder 14, controlled by hydraulic cylinder 15, ensures that the clamping center and bending fulcrum remain aligned, improving bending accuracy and consistency and avoiding quality problems such as angle errors, wrinkling, or breakage caused by height deviations. Furthermore, the collaborative design of the drive motor 8 driving the rotating rod 16 and the bearing sleeve 2, combined with the sliding guidance of the bearing ring 9 and annular groove 11, not only enhances the overall operational stability but also improves the equipment's automation level and ease of operation, reducing the frequency of manual adjustments and labor intensity. Meanwhile, the side groove 12 and the arc-shaped bearing plate 13 on one side of the frame 1 provide good initial positioning support for the skeleton tube, improving the stability of the processing starting point; the adjustment structure of the insertion rod 6 and the slot 7 simplifies the tube diameter adjustment steps, making it easy to quickly adapt to different specifications of products; the sliding cooperation between the protrusion 10 at the bottom of the bearing ring 9 and the annular groove 11 enhances the guiding performance during equipment operation and improves safety; the detachable structure of the connecting plate 17 and the support rod 21 not only improves the overall strength of the bearing cylinder 14, but also facilitates daily maintenance and replacement; the connection method between the threaded rod 18 and the threaded groove realizes the fine-tuning function of the connecting plate 17, further optimizing the support performance and processing accuracy of the equipment.

[0032] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A tube bending machine for processing automotive seat frames, comprising a frame, characterized in that, It also includes a rotating rod rotatably connected to the inner side of the frame, and a bearing sleeve fixedly connected to the top of the rotating rod; The bottom of the frame is fixedly connected to a drive motor by bolts, and the bottom end of the rotating rod passes through the bottom of the frame and is connected to the output shaft of the drive motor. The top of the bearing sleeve is fixedly connected to a first annular plate, and the inner side of the bearing sleeve is provided with an inner rod, and the top of the inner rod is fixedly connected to a second annular plate. The inner side of the frame is slidably connected to a bearing ring, and the top side of the bearing ring is fixedly connected to a hydraulic cylinder by bolts. The output shaft of the hydraulic cylinder is fixedly connected to a bearing cylinder. The inner sides of the bearing cylinder are provided with arc-shaped clamps, and the two sides of the bearing cylinder are fixedly connected to cylinders by bolts. The output shafts of the two cylinders pass through the side wall of the bearing cylinder and are fixedly connected to one side of the two arc-shaped clamps respectively.

2. The tube bending machine for processing automotive seat frames as described in claim 1, characterized in that, A side groove is provided on one side of the frame, and an arc-shaped bearing plate is fixedly connected to the inner side of the side groove.

3. The tube bending machine for processing automotive seat frames as described in claim 1, characterized in that, One side of the bearing sleeve is provided with a plug rod, and both one side of the bearing sleeve and one side of the inner rod are provided with slots for use with the plug rod, and the inner rod has several slots.

4. The tube bending machine for processing automotive seat frames as described in claim 1, characterized in that, Both sides of the bottom of the bearing ring are fixedly connected with protrusions, and both protrusions are slidably connected to the bottom inner side of the frame through an annular groove.

5. A tube bending machine for processing automotive seat frames as described in claim 1, characterized in that, A connecting plate is detachably connected to one side of the bearing cylinder, and a support rod is fixedly connected to one side of the connecting plate.

6. The tube bending machine for processing automotive seat frames as described in claim 5, characterized in that, Both sides of the connecting plate are provided with threaded rods, and both threaded rods pass through the connecting plate and one side of the bearing cylinder in sequence through threaded grooves.

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