A processing equipment for hollow corrugated bicycle handlebars

Abstract

This invention discloses a processing equipment for hollow corrugated bicycle handlebars, specifically relating to the field of hollow corrugated bicycle handlebar processing. It includes a bending machine body, a connecting support plate, a hydraulic cylinder, a first clamp, a rotating mechanism, a second clamp, and a bending mechanism. The connecting support plate, hydraulic cylinder, and first clamp are sequentially fixed above the bending machine body. This invention, through the axial support of the mandrel body, effectively prevents axial contraction of the hollow tube during bending due to uneven force. The coordinated work of the oil inlet hose and the oil outlet ball achieves precise delivery of lubricating oil, directly delivering it to the parts requiring lubrication, avoiding waste and ineffective application. During continuous bending, it continuously replenishes lubricating oil between the first and second outer support mandrels and the inner wall of the hollow tube, effectively overcoming the problem of rapid lubrication decay in traditional manual oiling methods, resulting in a more durable and stable lubrication effect.

Description

Technical Field

[0001] This invention relates to the field of processing technology for hollow corrugated handlebars for bicycles, and more specifically, to a processing device for hollow corrugated handlebars for bicycles. Background Technology

[0002] The bicycle industry has long been committed to reducing component weight while ensuring structural strength in order to improve riding experience and range. Hollow corrugated wall structures can improve ring stiffness and impact resistance through special structures. Compared with traditional solid handlebars or ordinary hollow handlebars, they reduce weight while taking into account deformation resistance and wear resistance, and are gradually becoming the preferred structure for high-end bicycles or customized handlebars. However, existing hollow handlebar processing equipment often suffers from low forming accuracy, uneven wall thickness, low processing efficiency, and poor adaptability, making it difficult to meet the requirements of lightweight and high-strength use. There is an urgent need for a processing equipment with optimized structure and strong adaptability.

[0003] In existing technology, when bending hollow metal tubes, the device requires inserting a mandrel inside for assistance. During bending, the mandrel provides support to the inside of the hollow metal tube, preventing the tube from collapsing or wrinkling. To reduce friction between the hollow metal tube and the mandrel, a special lubricant needs to be manually applied to the mandrel surface. However, this manual application is a "one-time pre-application." During continuous bending of the same hollow metal tube, the lubricant is gradually consumed and lost due to friction between the mandrel and the tube wall. Furthermore, when the mandrel is inserted into the tube, the pre-applied lubricant is easily scraped off the tube opening, resulting in a large amount adhering to the opening instead of the bending area that needs lubrication. This rapidly diminishes the lubrication effect. Consequently, after each bend or tube change, the mandrel must be manually removed from the hollow metal tube, and lubricant must be reapplied before subsequent bending can proceed. This necessitates frequent interruptions to the bending process, reducing the production efficiency of continuous bending. Summary of the Invention

[0004] The present invention provides a processing equipment for hollow corrugated bicycle handlebars, which aims to solve the problems of existing tube bending equipment where manual pre-application of lubricating oil leads to rapid decline in lubrication effect, interruption of processing flow, and low production efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a bicycle hollow corrugated handlebar processing equipment, comprising a tube bending machine body, a connecting support plate, a hydraulic cylinder, a first clamp, a rotating mechanism, a second clamp, and a tube bending mechanism. The connecting support plate, the hydraulic cylinder, and the first clamp are sequentially fixed above the tube bending machine body. The rotating mechanism and the second clamp are coaxially arranged on the upper surface of the tube bending machine body, and the second clamp and the rotating mechanism are provided with through holes. One end of the hollow tube to be processed is clamped in the second clamp, and the other end extends to the tube bending mechanism.

[0006] It also includes a mandrel oil inlet mechanism, which includes a mandrel body, an oil inlet hose, a connecting ball shaft, an oil passage, and an oil outlet ball. One end of the mandrel body is clamped to a first clamp, and the other end passes through a second clamp and a rotating mechanism and is sleeved with a hollow tube. An oil passage is provided inside the mandrel body along the axis. The connecting ball shaft is hinged to the other end of the mandrel body. The oil outlet ball is fixed to the end of the connecting ball shaft and is internally connected. The oil outlet ball has multiple oil outlet channels. The oil inlet hose is fixedly connected to the end of the mandrel body near the first clamp.

[0007] In a preferred embodiment, a shrinking mechanism is further included. The shrinking mechanism is disposed at one end of the mandrel oil inlet mechanism. The shrinking mechanism includes an inner core block, inclined sliders, a first outer support core sleeve, and a second outer support core sleeve. The inner core block is spherically hinged to the outside of the oil outlet ball. An inclined groove is provided on the side of the inner core block away from the axis of the mandrel body. Six inclined grooves are provided, and the inclined grooves are circumferentially opened along the axis of the inner core block. Six inclined sliders are also provided, each corresponding to one of the inclined grooves on the inner core block and slidably connected. The sliding direction of each inclined slider forms a certain angle with the radial direction of the inner core block. Three inclined sliders spaced apart from the inner core block are fixedly connected to the inner wall of the first outer support core sleeve on the outer end side away from the inner core block. The other three inclined sliders are fixedly connected to the inner wall of the second outer support core sleeve on the outer end side away from the inner core block. The outer rings of the three first outer support core sleeves and the three second outer support core sleeves together form a spherical profile.

[0008] In a preferred embodiment, the first outer support core sleeve has an oil outlet groove on the side near the inner core block, and the inner core block has an oil passage groove in the outer radial direction away from its own axis. There are six oil passage grooves, which are opened circumferentially along the axis of the inner core block.

[0009] In a preferred embodiment, both the first outer support core sleeve and the second outer support core sleeve are fixedly connected with rubber pads. The rubber pads are used to fit against the inner wall of the hollow tube, and when the rotating mechanism drives the hollow tube to rotate, the first outer support core sleeve and the second outer support core sleeve rotate synchronously through friction.

[0010] In a preferred embodiment, a limiting mechanism is further included. The limiting mechanism is disposed inside the shrinking mechanism. The limiting mechanism includes a plastic retaining ball, a retaining groove, a limiting ball, and a retaining groove. The six inclined sliders are all fixedly connected to the plastic retaining ball on the side near the inner core block. A retaining groove is opened at the corresponding position of the inner core block. The plastic retaining ball and the retaining groove are adapted to each other in size and engage in a locking fit.

[0011] In a preferred embodiment, a limiting ball is fixedly connected to one side of the inclined slider corresponding to the slot, and a limiting groove is formed at the corresponding position of the inner core block. The limiting ball extends into the limiting groove, and the size of the limiting groove is larger than the size of the limiting ball, in order to prevent the first outer support core sleeve and the second outer support core sleeve from completely separating from the inner core block.

[0012] In a preferred embodiment, an oil pump is fixedly connected to the upper surface of the connecting support plate, and the end of the oil inlet hose away from the mandrel body is fixedly connected to the output end of the oil pump. The oil pump is used to deliver lubricating oil to the oil inlet hose.

[0013] In a preferred embodiment, a moving mechanism is provided on the upper surface of the pipe bending machine body, and a rotating mechanism is fixedly connected to the upper surface of the moving mechanism. The moving mechanism is used to drive the rotating mechanism and the second clamp to move towards the pipe bending processing position.

[0014] In a preferred embodiment, the hollow tube is sleeved on the outside of the mandrel body, the first outer support sleeve, and the second outer support sleeve.

[0015] In a preferred embodiment, the first clamp is fixed to the output end of the hydraulic cylinder and coaxially arranged. The hydraulic cylinder can drive the first clamp and the mandrel oil inlet mechanism to move along the axis of the hollow tube by telescopic movement.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention effectively prevents axial contraction of the hollow tube due to uneven force during bending by using the axial support of the mandrel body. The coordinated work of the oil inlet hose and the oil outlet ball enables precise delivery of lubricating oil, directly delivering it to the parts that need lubrication. This avoids waste and ineffective application of lubricating oil. During continuous tube bending, it can continuously replenish lubricating oil between the first outer support mandrel, the second outer support mandrel, and the inner wall of the hollow tube, effectively overcoming the problem of rapid lubrication decay in traditional manual oiling methods, making the lubrication effect more durable and stable.

[0018] This invention utilizes a retraction mechanism. When the first and second outer support core sleeves become stuck in the hollow tube, the hydraulic cylinder is activated, and its piston rod retracts. The core rod body, through the connecting ball shaft and oil outlet ball, pulls the inner core block. As the pulling force continues to increase, the deformation of the plastic ball becomes increasingly severe. The portion originally embedded in the groove gradually detaches from the groove constraint, releasing the limit on the inclined slider. After the inclined slider is no longer obstructed, it triggers a retraction action along with the movement of the inner core block, detaching from the groove. Under the guidance and restriction of the inclined slide groove, the inclined slider drives the first and second outer support core sleeves to retract inward, disintegrating the spherical support structure. This prevents the core rod from getting stuck in the hollow tube and damaging the workpiece during rigid pull-back.

[0019] This invention utilizes the friction between the rubber pads on the first and second outer support core sleeves and the pipe wall to drive the first and second outer support core sleeves to rotate inside the hollow tube. The lubricating oil discharged through the oil outlet ball first adheres to the spaces between adjacent rubber pads and between the first and second outer support core sleeves and the pipe wall. As the first and second outer support core sleeves rotate synchronously with the hollow tube, the rubber pads act like scrapers, evenly spreading the lubricating oil along the circumference of the pipe wall. Simultaneously, the centrifugal force generated by the rotation causes the lubricating oil to diffuse towards the bending stress concentration areas of the pipe wall, increasing the lubricating oil diffusion area and ensuring even spreading of the lubricating oil with rotation, thus improving the lubrication coverage effect. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a front cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 4 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 5 This is a three-dimensional structural diagram of the mandrel oil inlet mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle;

[0026] Figure 7 This is a top cross-sectional view of the mandrel oil inlet mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram showing the other end of the mandrel oil inlet mechanism of the present invention.

[0028] Figure 9 This is a bottom view of the mandrel oil inlet mechanism of the present invention.

[0029] Figure 10 This is a cross-sectional view of the interior of the core block and connecting components of the present invention;

[0030] Figure 11 This is a schematic diagram showing the unfolded inner core block, the first outer support core sleeve, and the second outer support core sleeve of the present invention;

[0031] Figure 12 This is a schematic diagram showing the unfolding and contraction of the inner core block, the first outer support core sleeve, and the second outer support core sleeve of the present invention.

[0032] Figure 13This is a schematic diagram showing the unfolded inner core block and the other end of the first and second outer support core sleeves of the present invention.

[0033] The attached figures are labeled as follows: 1. Main body of the pipe bending machine; 2. Connecting support plate; 3. Hydraulic cylinder; 4. Oil pump; 5. First clamp; 6. Mandrel oil inlet mechanism; 61. Mandrel body; 611. Oil passage; 62. Oil inlet hose; 63. Connecting ball shaft; 64. Oil outlet ball; 641. Oil outlet passage; 7. Moving mechanism; 8. Retracting mechanism; 81. Inner core block; 811. Inclined slide groove; 82. Inclined slide block; 83. First outer support core sleeve; 84. Second outer support core sleeve; 85. Oil outlet groove; 86. Rubber pad; 87. Oil passage groove; 9. Limiting mechanism; 91. Plastic retaining ball; 92. Retaining groove; 93. Limiting ball; 94. Limiting groove; 10. Pipe bending mechanism; 11. Hollow pipe; 12. Second clamp; 13. Rotating mechanism. Detailed Implementation

[0034] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0035] Refer to the instruction manual appendix Figures 1-13 A processing device for hollow corrugated handlebars of bicycles includes a bending machine body 1, a connecting support plate 2, a hydraulic cylinder 3, a first clamp 5, a rotating mechanism 13, a second clamp 12, and a bending mechanism 10. The connecting support plate 2, the hydraulic cylinder 3, and the first clamp 5 are sequentially fixed above the bending machine body 1. The rotating mechanism 13 and the second clamp 12 are coaxially arranged on the upper surface of the bending machine body 1, and the second clamp 12 and the rotating mechanism 13 are provided with through holes. One end of the hollow tube 11 to be processed is clamped in the second clamp 12, and the other end extends to the bending mechanism 10.

[0036] It also includes a mandrel oil inlet mechanism 6, which includes a mandrel body 61, an oil inlet hose 62, a connecting ball shaft 63, and an oil outlet ball 64. One end of the mandrel body 61 is clamped on the first clamp 5, and the other end passes through the second clamp 12 and the rotating mechanism 13 and is sleeved with the hollow tube 11. The connecting ball shaft 63 is ball-hinged to the other end of the mandrel body 61. The oil outlet ball 64 is fixed to the end of the connecting ball shaft 63 and has multiple oil outlet channels 641. The oil inlet hose 62 is fixedly connected to the end of the mandrel body 61 near the first clamp 5.

[0037] It should be further explained that the main body 1 of the pipe bending machine serves as the basic load-bearing component of the equipment. The connecting support plate 2 is fixed to one end of the main body 1 of the pipe bending machine with bolts. The hydraulic cylinder 3 is fixed to the center of the upper surface of the connecting support plate 2. The piston rod of the output end of the hydraulic cylinder 3 is coaxially fixed with the first clamp 5. The first clamp 5 clamps one end of the mandrel body 61, realizing the fixation and axial movement of the mandrel body 61. A moving mechanism 7 is provided on the other end of the upper surface of the pipe bending machine main body 1. The moving mechanism 7 adopts a linear guide rail and lead screw drive structure. The rotating mechanism 13 is fixed to the sliding platform of the moving mechanism 7 with bolts. The second clamp 12 is coaxially fixed with the rotating mechanism 13, and both have through holes inside. These through holes connect to the mandrel body 61. The outer diameter of the mandrel body 61 is adapted to ensure that the mandrel body 61 can pass through smoothly. The bending mechanism 10 is fixed on the upper surface of the bending machine body 1 near the other end of the second clamp 12 and is used to perform bending processing on the hollow tube 11. In this embodiment, the first clamp 5 and the second clamp 12 are preferably four-jaw chucks. The two sets of four-jaw chucks rotate on the same central axis. The four-jaw chuck is existing technology and will not be described in detail. The rotating mechanism 13 includes at least a drive motor and a turntable installed on its output end. The second clamp 12 is installed on the turntable. The central axis of the turntable is collinear with the central axis of the second clamp 12. When the drive motor drives the turntable to rotate, it drives the second clamp 12 to rotate. This rotating mechanism 13 is also existing technology and will not be described in detail.

[0038] The oil pump 4 is fixed to the upper surface of the connecting support plate 2 by a bracket. The output end of the oil pump 4 is connected to the oil inlet hose 62. The end of the oil inlet hose 62 away from the oil pump 4 is connected to one end of the mandrel body 61 and communicates with the oil passage 611 opened inside the mandrel body 61. The oil passage 611 passes through the mandrel body 61. The oil outlet ball 64 has a through hole inside. One end of the through hole extends and passes through the inside of the connecting ball shaft 63 and communicates with the oil passage 611. The end of the through hole away from the oil passage 611 is connected to the oil outlet channel 641. The input end of the oil pump 4 is connected to the lubricating oil tank (not shown) through a pipe to realize the continuous supply of lubricating oil.

[0039] It should be noted that the pipe bending mechanism 10 is installed at one end of the pipe bending machine body 1, and it includes at least a fixed bending die and a movable pressing die. Both the fixed bending die and the movable pressing die are movably installed on the pipe bending machine body 1. One end of the hollow tube 11 is located between the fixed bending die and the movable pressing die. In use, the movable pressing die is driven to revolve around the fixed bending die, while the fixed bending die rotates on its own axis. When the movable pressing die revolves, it bends the hollow tube 11 between the fixed bending die and the fixed bending die. This bending mechanism, namely the fixed bending die and the movable bending die, is existing technology and has not been improved in this embodiment. It will not be described in detail hereafter.

[0040] Reference manual attached Figures 4-7The bicycle hollow corrugated handlebar processing equipment also includes a mandrel body 61. The outer diameter of the mandrel body 61 is smaller than the inner diameter of the hollow tube 11. One end is clamped and fixed by the first clamp 5, and the other end passes through the through holes of the second clamp 12 and the rotating mechanism 13 in sequence, and is sleeved and fitted with the hollow tube 11 to be processed. One end of the hollow tube 11 is clamped and fixed by the second clamp 12, and the other end extends to the processing area of ​​the bending mechanism 10. The inner wall of the hollow tube 11 is in contact with the outer ring of the mandrel body 61, the first outer support core sleeve 83 and the second outer support core sleeve 84.

[0041] The oil outlet ball 64 is connected to the other end of the mandrel body 61 by one end of the connecting ball shaft 63, which forms a ball hinge fit, allowing for multi-angle rotation. The oil outlet ball 64 is welded and fixed to the other end of the connecting ball shaft 63, and the connecting ball shaft 63 and the oil outlet ball 64 are internally connected. The spherical surface of the oil outlet ball 64 is evenly provided with multiple oil outlet channels 641 for uniformly discharging lubricating oil. The oil inlet hose 62, the oil passage 611, the through hole and the oil outlet channel 641 are interconnected to ensure that the lubricating oil can be accurately delivered to the oil outlet channel 641.

[0042] It should be noted that the axial support of the mandrel body 61 can effectively prevent the hollow tube 11 from axially shrinking due to uneven force during bending. The coordinated work of the oil inlet hose 62 and the oil outlet ball 64 enables precise delivery of lubricating oil, which is directly delivered to the bending area that needs lubrication. This avoids the waste and ineffective application of lubricating oil caused by the tube opening being scratched during traditional manual pre-coating. The lubricating oil is continuously replenished during continuous tube bending to ensure a long-lasting and stable lubrication effect.

[0043] Example 2: Existing mandrels, to ensure support, need to fit tightly against the inner wall of the hollow tube 11. After bending, the tube deformation creates enveloping pressure on the mandrel, potentially causing the ball end of the mandrel to jam. Since existing mandrels lack an active retraction structure, they can only be forcibly removed by rigid pullback, which easily causes scratches on the inner wall of the hollow tube 11, deformation of the corrugated structure, or even direct tearing of the workpiece. Therefore, to prevent the mandrel from jamming with the tube wall, in this example, refer to the appendix to the instruction manual... Figure 7 - Appendix Figure 13 Based on the above embodiments, a shrinkage mechanism 8 is also included. The shrinkage mechanism 8 is disposed at the other end of the mandrel oil inlet mechanism 6. The inner core block 81 is connected to the outside of the oil outlet ball 64 through a ball joint structure. It can rotate synchronously with the oil outlet ball 64 and can be relatively finely adjusted in angle. Six inclined sliding grooves 811 are evenly opened along the circumferential direction on the side of the inner core block 81 away from the axis of the mandrel body 61. The inclined sliding grooves 811 are opened at an angle to the radial direction of the inner core block 81. The six inclined sliding blocks 82 correspond one-to-one with the inclined sliding grooves 811. The inclined sliding blocks 82 are located in the inclined sliding grooves 811 and form a sliding guide fit with the inclined sliding grooves 811. Figure 13As shown, the inner core block 81 is approximately in the shape of a hexagonal pyramid frustum, and six oblique grooves 811 are respectively opened on the six conical surfaces of the hexagonal pyramid frustum, and the groove direction of the oblique grooves 811 is consistent with the length direction of the conical surface.

[0044] Three of the six inclined sliders 82, spaced apart, have their outer ends, away from the inner core block 81, fixedly connected to the inner wall of the first outer support core sleeve 83 by bolts. The outer ends of the other three inclined sliders 82 are fixedly connected to the inner wall of the second outer support core sleeve 84. The outer rings of the three first outer support core sleeves 83 and the three second outer support core sleeves 84 together form a complete spherical profile, which fits against the inner wall of the hollow tube 11 to form a support.

[0045] The first outer support sleeve 83 has an oil outlet groove 85 on the side near the inner core block 81. The inner core block 81 has six oil passage grooves 87 radially arranged on its outer side away from its own axis. The oil passage grooves 87 correspond to the oil outlet grooves 85, ensuring that the lubricating oil discharged from the oil outlet ball 64 can further diffuse to the inner wall of the hollow tube 11 through the oil passage grooves 87 and the oil outlet grooves 85. Rubber pads 86 are bonded and fixed to the outer rings of both the first outer support sleeve 83 and the second outer support sleeve 84. The rubber pads 86 are tightly fitted to the inner wall of the hollow tube 11. When the rotating mechanism 13 drives the hollow tube 11 to rotate, the friction generated between the rubber pads 86 and the tube wall can... The first outer support sleeve 83 and the second outer support sleeve 84 rotate inside the hollow tube 11. The lubricating oil discharged through the oil outlet ball 64 first adheres to the gaps between adjacent rubber pads 86 and between the first outer support sleeve 83, the second outer support sleeve 84 and the tube wall. When the first outer support sleeve 83 and the second outer support sleeve 84 rotate synchronously with the hollow tube 11, the rubber pads 86 act like scrapers, spreading the lubricating oil evenly along the circumference of the tube wall. At the same time, the centrifugal force generated by the rotation causes the lubricating oil to diffuse towards the bending stress concentration area of ​​the tube wall, increasing the lubricating oil diffusion area and making the lubricating oil spread evenly with the rotation, thus improving the lubrication coverage effect.

[0046] It should be noted that when the first outer support sleeve 83 and the second outer support sleeve 84 are stuck inside the hollow tube 11 after the tube bending process is completed, the hydraulic cylinder 3 is activated to retract its piston rod. The mandrel body 61 pulls the inner core block 81 to one end through the connecting ball shaft 63 and the oil outlet ball 64. The plastic retaining ball 91 deforms under tension, releasing the limit on the inclined slider 82. Under the guidance and restriction of the inclined slide groove 811, the inclined slider 82 retracts inward with the movement trend of the inner core block 81, causing the first outer support sleeve 83 and the second outer support sleeve 84 to retract inward synchronously. The spherical support structure disintegrates, thereby avoiding rigid pull-back that could cause the mandrel to jam and damage the workpiece.

[0047] Reference manual attached Figures 8-10The bicycle hollow corrugated handlebar processing equipment also includes a limiting mechanism 9. The limiting mechanism 9 is located inside the shrinking mechanism 8. The six inclined sliders 82 are fixedly connected to plastic retaining balls 91 by inlay on the side near the inner core block 81. The groove wall of the inclined sliding groove 811 of the inner core block 81 is provided with a corresponding slot 92. The plastic retaining balls 91 and the slots 92 are matched in size. The initial position of the inclined sliders 82 is limited by the snap-fit, ensuring that the spherical profile formed by the first outer support core sleeve 83 and the second outer support core sleeve 84 remains stable, providing reliable support for the hollow tube 11. Therefore, deformation and separation will only be triggered when the core rod is subjected to sufficient tension required for jamming, ensuring that the limiting mechanism 9 remains locked during the bending process and preventing the support structure from loosening unexpectedly.

[0048] A limiting ball 93 is welded and fixed on one side of the inclined slider 82 corresponding to the slot 92. A limiting groove 94 is opened at the corresponding position on the inner wall of the inclined slide groove 811 of the inner core block 81. The limiting ball 93 extends into the limiting groove 94, and the size of the limiting groove 94 is larger than the size of the limiting ball 93. Its function is to limit the movement stroke of the inclined slider 82, prevent the first outer support core sleeve 83 and the second outer support core sleeve 84 from completely separating from the inner core block 81, and ensure the structural integrity and reusability of the shrinkage mechanism 8.

[0049] It should be noted that the limiting mechanism 9 achieves initial limiting through the engagement of the plastic ball 91 and the slot 92, ensuring the stability of the support structure during the bending process. At the same time, the deformable characteristics of the plastic ball 91 allow it to smoothly release the limiting when subjected to a specific tensile force. As the tensile force continues to increase, the deformation of the plastic ball 91 intensifies, and the part originally embedded in the slot 92 gradually detaches from the groove constraint. The radial clamping force at the engagement point rapidly decreases. When the tensile force reaches a preset threshold, the plastic ball 91 completely detaches from the limiting range of the slot 92, and the locking state between the inclined slider 82 and the inner core block 81 is released, providing a guarantee for the operation of the retraction mechanism 8. The cooperation between the limiting ball 93 and the limiting slot 94 further optimizes the motion reliability of the mechanism and avoids equipment failure caused by component detachment.

[0050] In this embodiment, during the overall use of the equipment, one end of the hollow tube 11 to be processed is inserted into the second clamp 12, and the second clamp 12 is activated to clamp and fix the hollow tube 11. The other end of the hollow tube 11 extends to the bending mechanism 10. The hydraulic cylinder 3 is activated, and its piston rod extends, driving the first clamp 5 and the mandrel body 61 to move to the other end, so that the mandrel body 61, the first outer support sleeve 83 and the second outer support sleeve 84 are inserted into the hollow tube 11 together until the support area of ​​the first outer support sleeve 83 and the second outer support sleeve 84 covers the part of the hollow tube 11 to be bent.

[0051] Start the oil pump 4. The oil pump 4 pressurizes the lubricating oil in the lubricating oil tank and delivers it through the oil inlet hose 62, through the oil passage 611, and through the through hole of the oil outlet ball 64 to the oil outlet ball 64. The lubricating oil is discharged through the oil outlet passage 641 of the oil outlet ball 64. The lubricating oil flows through the oil passage groove 87 of the inner core block 81 and the oil outlet groove 85 of the first outer support core sleeve 83 to the wall between the first outer support core sleeve 83, the second outer support core sleeve 84 and the hollow tube 11, thereby achieving lubrication between the first outer support core sleeve 83, the second outer support core sleeve 84 and the wall of the hollow tube 11.

[0052] At the same time, the tube bending mechanism 10 is activated to perform a pre-set angle bending process on the hollow tube 11. During this process, the mandrel body 61 provides axial support, and the first outer support core sleeve 83 and the second outer support core sleeve 84 provide radial support to prevent the hollow tube 11 from collapsing and wrinkling.

[0053] During continuous processing, for continuous bending of the same hollow tube 11, the moving mechanism 7 first moves the tube to the predetermined bending position, and the oil pump 4 then delivers lubricating oil to the oil inlet hose 62. The lubricating oil consumed is replenished through the oil outlet ball 64. At the same time, the rotating mechanism 13 is started, which drives the second clamp 12 and the hollow tube 11 to rotate synchronously. When the hollow tube 11 rotates, the friction of the rubber pad 86 drives the first outer support core sleeve 83 and the second outer support core sleeve 84 to rotate relative to each other, so that the lubricating oil is evenly spread on the inner wall of the hollow tube 11. Thus, during this process, there is no need to interrupt the processing for manual oiling, which effectively improves production efficiency.

[0054] When a hollow tube 11 is finished or needs to be replaced, the oil pump 4 and the rotating mechanism 13 are turned off, and the hydraulic cylinder 3 is started to retract its piston rod, which drives the mandrel body 61 to move to one end. If the first outer support sleeve 83 and the second outer support sleeve 84 are stuck, the inner core block 81 pulls the inclined slider 82 during the retraction process, the plastic retaining ball 91 deforms and disengages from the retaining groove 92, and the inclined slider 82 retracts inward along the inclined sliding groove 811, which drives the first outer support sleeve 83 and the second outer support sleeve 84 to disintegrate. The mandrel is then successfully pulled out of the hollow tube 11. Then the second clamp 12 is released, the finished handlebar is removed, and the next tube can be processed.

[0055] It should be noted that during the entire process, the various mechanisms work together, which not only solves the problem of rapid lubrication decay and frequent interruption of processing in traditional pipe bending, but also avoids the risk of the mandrel getting stuck and damaging the workpiece through the shrinkage mechanism 8. At the same time, the synchronously rotating outer support sleeve improves the uniformity of lubrication and the stability of support, further improving the processing quality and production efficiency of hollow corrugated bicycle handlebars.

[0056] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A bicycle hollow corrugated handlebar processing equipment, comprising a tube bending machine body (1), a connecting support plate (2), a hydraulic cylinder (3), a first clamp (5), a rotating mechanism (13), a second clamp (12), and a tube bending mechanism (10). The connecting support plate (2), the hydraulic cylinder (3), and the first clamp (5) are sequentially fixed above the tube bending machine body (1). The rotating mechanism (13) and the second clamp (12) are coaxially arranged on the upper surface of the tube bending machine body (1). The second clamp (12) and the rotating mechanism (13) are provided with through holes. One end of the hollow tube (11) to be processed is clamped in the second clamp (12), and the other end extends to the tube bending mechanism (10). Its features are, It also includes a mandrel oil inlet mechanism (6), which includes a mandrel body (61), an oil inlet hose (62), a connecting ball shaft (63), an oil passage (611), and an oil outlet ball (64). One end of the mandrel body (61) is clamped to the first clamp (5), and the other end passes through the second clamp (12) and the rotating mechanism (13) and is sleeved with the hollow tube (11). An oil passage (611) is provided inside the mandrel body (61) along the axis. The connecting ball shaft (63) is ball-hinged to the other end of the mandrel body (61) to provide oil outlet. The ball (64) is fixed to the end of the connecting ball shaft (63) and is internally connected. The oil outlet ball (64) is provided with multiple oil outlet channels (641). The oil inlet hose (62) is fixedly connected to the end of the mandrel body (61) near the first clamp (5). It also includes a shrinking mechanism (8). The shrinking mechanism (8) is set at one end of the mandrel oil inlet mechanism (6). The shrinking mechanism (8) includes an inner core block (81), a sliding block (82), a first outer support core sleeve (83), and a second outer support core sleeve (84). The inner core block (81) is spherically hinged to the oil outlet ball (64). On the outside, the inner core block (81) has a slanted groove (811) on the side away from the axis of the core rod body (61). There are six slanted grooves (811), which are circumferentially arranged along the axis of the inner core block (81). There are also six slanted sliders (82), which correspond one-to-one with the slanted grooves (811) on the inner core block (81) and are slidably connected. The sliding direction of each slanted slider (82) forms a certain angle with the radial direction of the inner core block (81). The three slanted sliders (82) that are spaced apart from each other are located away from the inner core block. The outer side of (81) is fixedly connected to the inner wall of the first outer support core sleeve (83). The other three inclined sliders (82) are fixedly connected to the inner wall of the second outer support core sleeve (84) on the outer side away from the inner core block (81). The outer rings of the three first outer support core sleeves (83) and the three second outer support core sleeves (84) together form a spherical profile. The first clamp (5) is fixed at the output end of the hydraulic cylinder (3) and is coaxially arranged. The hydraulic cylinder (3) can drive the first clamp (5) and the core rod oil inlet mechanism (6) to move along the axis of the hollow tube (11) by extension and retraction.

2. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, The first outer support core sleeve (83) has an oil outlet groove (85) on the side close to the inner core block (81), and the inner core block (81) has an oil passage groove (87) on the outer radial side away from its own axis. There are six oil passage grooves (87), and the six oil passage grooves (87) are opened around the axis of the inner core block (81).

3. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, The outer rings of the first outer support core sleeve (83) and the second outer support core sleeve (84) are both fixedly connected with rubber pads (86). The rubber pads (86) are used to fit against the inner wall of the hollow tube (11). When the rotating mechanism (13) drives the hollow tube (11) to rotate, the first outer support core sleeve (83) and the second outer support core sleeve (84) are driven to rotate synchronously by friction.

4. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, It also includes a limiting mechanism (9), which is located inside the shrinking mechanism (8). The limiting mechanism (9) includes a plastic ball (91) and a slot (92). The six inclined sliders (82) are fixedly connected to the plastic ball (91) on the side near the inner core block (81). The inner core block (81) has a slot (92) at the corresponding position. The plastic ball (91) and the slot (92) are adapted to each other in size and are engaged.

5. The bicycle hollow corrugated handlebar processing equipment according to claim 4, characterized in that, The limiting mechanism (9) also includes a limiting ball (93) and a limiting groove (94). The limiting ball (93) is fixedly connected to one side of the inclined slider (82) corresponding to the slot (92). The limiting groove (94) is opened at the corresponding position of the inner core block (81). The limiting ball (93) extends into the limiting groove (94), and the size of the limiting groove (94) is larger than the size of the limiting ball (93) to prevent the first outer support core sleeve (83) and the second outer support core sleeve (84) from completely separating from the inner core block (81).

6. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, An oil pump (4) is fixedly connected to the upper surface of the connecting support plate (2). The end of the oil inlet hose (62) away from the mandrel body (61) is fixedly connected to the output end of the oil pump (4). The oil pump (4) is used to deliver lubricating oil to the oil inlet hose (62).

7. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, The upper surface of the main body (1) of the pipe bending machine is provided with a moving mechanism (7), and a rotating mechanism (13) is fixedly connected to the upper surface of the moving mechanism (7). The moving mechanism (7) is used to drive the rotating mechanism (13) and the second clamp (12) to move to the pipe bending processing position.

8. The bicycle hollow corrugated handlebar processing equipment according to claim 1, characterized in that, The hollow tube (11) is sleeved on the outside of the mandrel body (61), the first outer support core sleeve (83) and the second outer support core sleeve (84).

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