A bicycle frame pipe bending device

Abstract

The present disclosure relates to the technical field of bicycle frame processing, and one embodiment of the present disclosure provides a bicycle frame pipe bending processing device, which comprises an equipment frame and a front frame, the front frame is arranged at the outer end of the equipment frame, a forming seat is fixed on the surface of the equipment frame, a positioning assembly is arranged on one side of the forming seat, a forming groove is arranged on the side surface of the forming seat, a bending assembly is arranged on the equipment frame and the front frame, the bending assembly comprises a pair of sliding rods, the sliding rods are fixed on the side surface of the front frame, the front frame is horizontally movably sleeved in the side surface of the equipment frame through the sliding rods, the front frame and the equipment frame are connected through horizontal linear driving, and a first bending block is arranged at one end of the surface of the front frame. Through the above technical scheme, the technical problems of low processing efficiency and inconvenient rapid positioning of the conventional bicycle frame pipe bending processing device in the prior art are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of bicycle frame processing, and more specifically, to a bicycle frame bending tube processing apparatus. Background Technology

[0002] In bicycle frame manufacturing, tube bending is a core process for shaping key components such as the main beam and seat tube. Its processing precision directly determines the frame's structural stability, riding comfort, and aesthetic consistency. Bicycle frame tube bending typically uses high-strength steel or aluminum alloy tubing, requiring specific bending angles and curvatures designed for different bike types (mountain bikes, road bikes, commuter bikes). Therefore, the efficiency and positioning accuracy of the tube bending equipment are critically demanding. However, traditional bicycle frame tube bending equipment generally employs a single pressure bending method, resulting in low processing efficiency and difficulty in rapid positioning, severely hindering the efficiency of mass production.

[0003] Traditional bending equipment requires manual adjustment of the pipe position to align with the bending die's reference points. The entire positioning process relies on the operator's experience and judgment, which is not only time-consuming but also prone to bending angle deviations due to reference point errors. Furthermore, bending operations are mostly intermittent single-station processing; after completing one section of bending, the machine must be stopped to adjust the pipe position before processing the next section. This makes continuous operation impossible, and only a small number of pipes can be processed per unit time, making it difficult to meet the needs of large-scale bicycle frame production.

[0004] Furthermore, the inconsistency of manual positioning is poor, and angular errors are prone to occur in the bending of frame tubes within the same batch. This leads to misalignment of components during subsequent frame welding, requiring additional correction and increasing rework costs. At the same time, frequent downtime for adjustments also exacerbates equipment wear and tear, reducing the lifespan of the device. Therefore, developing a bicycle frame bending processing device with a highly efficient bending structure and rapid positioning function has become an urgent need to solve industry pain points and improve production efficiency and product quality. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a bicycle frame bending processing device, which solves the technical problems of low processing efficiency and inconvenience in quick positioning that traditional bicycle frame bending processing devices in the prior art generally adopt a single bending method.

[0006] According to one aspect, at least one embodiment of the present disclosure provides a bicycle frame bending apparatus, comprising: The equipment rack and the front frame, wherein the front frame is disposed at the outer end of the equipment rack; A molding base and a positioning component, wherein the molding base is fixed to the surface of the equipment frame and the positioning component is disposed on one side of the molding base; The forming groove and the bending assembly are provided, wherein the forming groove is formed on the side surface of the forming seat and the bending assembly is provided on the equipment frame and the front frame; The bending assembly includes a pair of slide rods, which are fixed to the side surface of the front frame. The front frame is horizontally and movably fitted inside the side surface of the equipment frame via the slide rods. The front frame and the equipment frame are connected by a horizontal linear drive. A first bending block is provided at one end of the surface of the front frame.

[0007] As a further technical solution, a movable frame is connected to the front frame surface in a horizontal linear drive. A bending hydraulic cylinder is horizontally installed on one side of the movable frame. A fixed frame is provided at the output end of the bending hydraulic cylinder. A stabilizing rod is movably connected between the fixed frame and the movable frame.

[0008] As a further technical solution, the front end of the fixing frame is vertically rotatably connected to a second bending block via a rotating shaft. A worm wheel is provided at the upper end of the rotating shaft of the second bending block. A worm is horizontally rotatably connected to the top of the fixing frame. The worm meshes with the worm wheel and is driven to rotate by electricity.

[0009] As a further technical solution, a top frame is provided at one end of the top of the forming seat, a pressing hydraulic cylinder is provided on the side surface of the top frame, and a third pressing bending block is provided at the output end of the pressing hydraulic cylinder, the third pressing bending block being located on one side of the forming groove.

[0010] According to another aspect, in at least one embodiment of the present invention, the positioning component includes a fixed seat, the fixed seat is fixed to one side surface of the forming seat, an internally threaded block is rotatably connected inside the fixed seat, an adjusting stud is connected inside the internally threaded block by thread engagement, and a positioning plate is fixedly connected to one end of the adjusting stud.

[0011] As a further technical solution, the positioning plate is located at one end of the forming groove, and a number of reinforcing rods are provided on the side surface of the positioning plate, with one end of the reinforcing rod movably fitted into the fixed base.

[0012] As a further technical solution, the outer surface of the internal thread block has a polygonal structure.

[0013] As a further technical solution, the second bending block can rotate 90° through the worm gear and the worm wheel transmission.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the bending assembly solves the problem of low efficiency in traditional single bending by employing a multi-stage simultaneous bending design. The first bending block provides initial positioning, the second bending block adjusts its angle using a worm gear to accommodate different curvatures, and the third bending block presses firmly to prevent displacement. The horizontal drive of the front frame and the moving frame enables precise feeding, while the stabilizing rod ensures smooth bending. This structure eliminates the need for frequent mold changes, allows for continuous processing of pipes with different bending angles, reduces downtime for adjustments, increases throughput per unit time, and prevents deformation caused by uneven stress on the pipe, ensuring bending accuracy and consistency, and meeting the diverse bending needs of bicycle frames. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is another isometric view of the present disclosure; In the diagram: 1. Equipment frame; 2. Front frame; 3. Forming seat; 4. Forming groove; 5. Bending assembly; 5-1. Slide rod; 5-2. First bending block; 5-3. Moving frame; 5-4. Bending hydraulic cylinder; 5-5. Fixed frame; 5-6. Stabilizing rod; 5-7. Second bending block; 5-8. Worm gear; 5-9. Worm; 5-10. Top frame; 5-11. Pressing hydraulic cylinder; 5-12. Third bending block; 6. Positioning assembly; 6-1. Fixed seat; 6-2. Internal threaded block; 6-3. Positioning plate; 6-4. Reinforcing rod; 6-5. Adjusting stud. Detailed Implementation

[0017] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-3 As shown, a bicycle frame bending apparatus according to an embodiment of the present disclosure is illustrated, comprising: Equipment rack 1 and front frame 2, wherein the front frame 2 is disposed at the outer end of the equipment rack 1; The molding base 3 and the positioning component 6 are provided. The molding base 3 is fixed to the surface of the equipment frame 1, and the positioning component 6 is disposed on one side of the molding base 3. The forming groove 4 and the bending assembly 5 are provided on the side surface of the forming seat 3, and the bending assembly 5 is provided on the equipment frame 1 and the front frame 2. The bending assembly 5 includes a pair of slide rods 5-1, which are fixed to the side surface of the front frame 2. The front frame 2 is horizontally and movably fitted into the side surface of the equipment frame 1 via the slide rods 5-1. The front frame 2 and the equipment frame 1 are connected by a horizontal linear drive. A first bending block 5-2 is provided at one end of the surface of the front frame 2. A movable frame 5-3 is horizontally and linearly connected to the surface of the front frame 2. A bending hydraulic cylinder 5-4 is horizontally mounted on one side of the movable frame 5-3. A fixed frame 5-5 is provided at the output end of the bending hydraulic cylinder 5-4. The fixed frame 5-5 and the movable frame 5-3 are movably and securely connected. The rod 5-6, the front end of the fixed frame 5-5 is vertically rotatably connected to the second bending block 5-7 via a rotating shaft, the upper end of the rotating shaft of the second bending block 5-7 is provided with a worm gear 5-8, the top of the fixed frame 5-5 is horizontally rotatably connected to a worm 5-9, the worm 5-9 meshes with the worm gear 5-8, the worm 5-9 is driven to rotate by electricity, one end of the top of the forming seat 3 is provided with a top frame 5-10, the side surface of the top frame 5-10 is provided with a pressing hydraulic cylinder 5-11, the output end of the pressing hydraulic cylinder 5-11 is provided with a third bending block 5-12, the third bending block 5-12 is located on one side of the forming groove 4.

[0024] In some examples, a bending assembly 5 is designed to achieve progressive bending of bicycle frame tubes, adapting to bending requirements with different curvatures. A pair of stabilizing rods 5-6 fixed to the side surface of the front frame 2 are horizontally distributed. The front frame 2 is movably fitted into corresponding holes on the side surface of the equipment frame 1 through the stabilizing rods 5-6, forming a sliding guide structure to ensure that the front frame 2 moves only in the horizontal direction. A horizontal linear drive component (which can be a servo electric cylinder) between the front frame 2 and the equipment frame 1 provides power for the movement of the front frame 2, accurately controlling the feed distance of the front frame 2 and driving the bending component to gradually approach the forming seat 3. The first bending block 5-2 at one end of the surface of the front frame 2 has an arc-shaped structure, which can initially fit the surface of the bent pipe. The movable frame 5-3 on the surface of the front frame 2 is connected by a horizontal linear drive component and can slide along the length of the front frame 2 to adjust the distance between it and the first bending block 5-2. The output end of the bending hydraulic cylinder 5-4, which is horizontally installed on one side of the movable frame 5-3, is fixed to the fixed frame 5-5. The fixed frame 5-5 is connected to the movable frame 5-3 through a movable stabilizing rod 5-6. The stabilizing rod 5-6 ensures that there is no deviation when the bending hydraulic cylinder 5-4 drives the fixed frame 5-5 to move. The front end of the fixed frame 5-5 has a second bending block 5-7 that rotates vertically through a rotating shaft. The worm gear 5-8 at the upper end of the rotating shaft meshes with the worm 5-9 that rotates horizontally at the top of the fixed frame 5-5. The worm 5-9 is electrically driven to rotate, which can precisely adjust the rotation angle of the second bending block 5-7 to adapt to different pipe curvatures.

[0025] The top frame 5-10 at one end of the forming base 3 has an L-shaped structure. The output end of the pressing hydraulic cylinder 5-11 on the side surface is connected to the third pressing block 5-12. The third pressing block 5-12 is located on one side of the forming groove 4 and can press the bent tube downward to prevent the workpiece from shifting during bending.

[0026] During operation, after the bent tube is placed into the forming groove 4, the pressing hydraulic cylinder 5-11 drives the third pressing block 5-12 to press the bent tube tightly. The horizontal linear drive component moves the front frame 2 closer, and the first pressing block 5-2 initially contacts the bent tube. After the moving frame 5-3 adjusts its position, the pressing hydraulic cylinder 5-4 drives the second pressing block 5-7 to fit against the bent tube. The worm gear 5-9 drives the worm wheel 5-8 to rotate, so that the second pressing block 5-7 cooperates with the first pressing block 5-2 to gradually press the bent tube. The front frame 2 continues to feed, realizing the progressive forming of the bent tube. The cooperation of all components ensures the bending accuracy and curvature consistency, meeting the processing requirements of bicycle frame bent tubes.

[0027] like Figures 1-3 As shown in the figure, the positioning component 6 in this embodiment includes a fixed base 6-1, which is fixed to one side surface of the forming base 3. An internally threaded block 6-2 is rotatably connected inside the fixed base 6-1. An adjusting stud 6-5 is threadedly connected inside the internally threaded block 6-2. A positioning plate 6-3 is fixedly connected to one end of the adjusting stud 6-5. The positioning plate 6-3 is located at one end of the forming groove 4. A plurality of reinforcing rods 6-4 are provided on the side surface of the positioning plate 6-3. One end of each reinforcing rod 6-4 is movably fitted inside the fixed base 6-1.

[0028] In some examples, to achieve precise positioning of the bicycle frame bend loading position, ensure consistent loading position each time, and improve bending consistency, the fixing seat 6-1 on one side surface of the forming seat 3 has a hollow structure. The internally rotating internal threaded block 6-2 can rotate around its own axis. The thread on the inner wall of the internal threaded block 6-2 cooperates with the adjusting stud 6-5 to form a threaded transmission structure. One end of the adjusting stud 6-5 is fixedly connected to the positioning plate 6-3. The positioning plate 6-3 is located at one end of the forming groove 4 and can fit against the end of the bend to limit the loading length of the bend.

[0029] Several reinforcing rods 6-4 are evenly distributed on the side surface of the positioning plate 6-3. One end of each rod is movably fitted into the corresponding through hole of the fixed seat 6-1. The sliding fit between the reinforcing rods 6-4 and the fixed seat 6-1 provides guidance for the positioning plate 6-3, preventing tilting when the adjusting stud 6-5 moves the positioning plate 6-3, and ensuring that the positioning plate 6-3 always remains vertical and aligned with the axis of the forming groove 4.

[0030] During operation, according to the required processing length of the bent pipe, the internal thread block 6-2 is rotated, and the adjusting stud 6-5 is driven to move axially along the fixed seat 6-1 through the thread transmission, thereby adjusting the distance between the positioning plate 6-3 and the forming groove 4. After the position of the positioning plate 6-3 is determined, when the bent pipe is fed, one end is attached to the positioning plate 6-3, which can ensure that the position of the bent pipe in the forming groove 4 is uniform and avoid the bending dimension deviation caused by the feeding offset.

[0031] The rotation of the internal threaded block 6-2 can be driven by a handwheel or motor, making operation convenient; the guiding effect of the reinforcing rod 6-4 improves the stability of the movement of the positioning plate 6-3 and ensures the accurate relative position of the positioning plate 6-3 and the forming groove 4; the self-locking property of the threaded drive can prevent the positioning plate 6-3 from shifting due to vibration during use, ensuring positioning stability.

[0032] This component achieves flexible adjustment and precise positioning of the feeding position through a simple structure, adapting to the bending of bicycle frame tubes of different lengths, thus improving the versatility and processing accuracy of the equipment.

[0033] For example, such as Figure 2 As shown, the outer surface of the internal thread block 6-2 has a polygonal structure.

[0034] In some examples, the polygonal structure around the outer surface of the internal threaded block 6-2 facilitates rotation of the internal threaded block 6-2 using tools or by hand. The polygonal structure (such as hexagons or octagons) increases the contact friction between the hand or tool and the internal threaded block 6-2, preventing slippage during rotation and allowing the operator to easily drive the internal threaded block 6-2 to rotate, thereby adjusting the position of the positioning plate 6-3. Simultaneously, the polygonal structure eliminates the need for an additional handle, simplifying the structure of the internal threaded block 6-2 and facilitating rotation with common tools such as wrenches, thus improving the ease of adjusting the positioning component 6, reducing the operation time for adjusting the position of the positioning plate 6-3, and increasing the efficiency of material loading and positioning.

[0035] For example, such as Figure 1 As shown, the second bending block 5-7 can rotate 90° through the transmission between the worm gear 5-9 and the worm wheel 5-8.

[0036] In some examples, the second bending block 5-7 can rotate 90° via a worm gear 5-9 and a worm wheel 5-8, adapting to different bending angle requirements of bicycle frame bends from 0° to 90°. The precise transmission of the worm gear 5-9 and worm wheel 5-8 ensures that the second bending block 5-7 remains stably stationary at any angle within the 90° rotation range, meeting the processing requirements for different bend curvatures. When a small-angle bend is required, the second bending block 5-7 can be controlled to rotate a smaller angle; for right-angle bends, it can be rotated to 90°. This adjustability significantly improves the versatility of the bending assembly 5, allowing for the processing of bicycle frame bends with various bending angles without replacing the bending block, reducing equipment costs and changeover time.

[0037] In practical use: Based on the requirements for bending the bicycle frame tube, rotate the internal threaded block 6-2 of the positioning component 6, and adjust the stud 6-5 to move the positioning plate 6-3 along the reinforcing rod 6-4 to determine the reference position for loading the bent tube. Place one end of the bent tube against the positioning plate 6-3 into the forming groove 4 of the forming seat 3. The pressing hydraulic cylinder 5-11 on the top frame 5-10 drives the third pressing block 5-12 to press the bent tube. A horizontal linear drive pushes the front frame 2 along the slide rod 5-1 towards the forming seat 3, and the first pressing block 5-2 initially contacts the bent tube. A lateral drive adjusts the position of the moving frame 5-3, and the pressing hydraulic cylinder 5-4 pushes the second pressing block 5-7 to adhere to the bent tube. An electric drive worm 5-9 drives the worm wheel 5-8 to rotate, and the second pressing block 5-7 rotates to adapt to the curvature of the bent tube, gradually pressing the bent tube in conjunction with the first pressing block 5-2. The front frame 2 continuously feeds to achieve progressive forming of the bent tube. After processing, all components are reset, and the bent tube can be removed for the next processing.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A bicycle frame bending processing device, characterized in that, include: Equipment rack (1) and front frame (2), the front frame (2) being disposed at the outer end of the equipment rack (1); A molding base (3) and a positioning component (6) are provided, wherein the molding base (3) is fixed to the surface of the equipment frame (1) and the positioning component (6) is disposed on one side of the molding base (3); The forming groove (4) and the bending assembly (5) are provided. The forming groove (4) is formed on the side surface of the forming seat (3), and the bending assembly (5) is provided on the equipment frame (1) and the front frame (2). The bending assembly (5) includes a pair of slide rods (5-1), which are fixed to the side surface of the front frame (2). The front frame (2) is horizontally and movably fitted inside the side surface of the equipment frame (1) via the slide rods (5-1). The front frame (2) and the equipment frame (1) are connected by a horizontal linear drive. A first bending block (5-2) is provided at one end of the surface of the front frame (2).

2. The bicycle frame bending device according to claim 1, characterized in that, The front frame (2) is horizontally linearly driven to connect a movable frame (5-3). A bending hydraulic cylinder (5-4) is horizontally installed on one side of the movable frame (5-3). A fixed frame (5-5) is provided at the output end of the bending hydraulic cylinder (5-4). A stabilizing rod (5-6) is movably connected between the fixed frame (5-5) and the movable frame (5-3).

3. The bicycle frame bending device according to claim 2, characterized in that, The front end of the fixed frame (5-5) is vertically rotatably connected to a second bending block (5-7) via a rotating shaft. A worm gear (5-8) is provided at the upper end of the rotating shaft of the second bending block (5-7). A worm (5-9) is horizontally rotatably connected to the top of the fixed frame (5-5). The worm (5-9) meshes with the worm gear (5-8). The worm (5-9) is driven to rotate by electricity.

4. The bicycle frame bending device according to claim 3, characterized in that, The top end of the forming seat (3) is provided with a top frame (5-10), and the side surface of the top frame (5-10) is provided with a pressing hydraulic cylinder (5-11). The output end of the pressing hydraulic cylinder (5-11) is provided with a third pressing block (5-12), and the third pressing block (5-12) is located on one side of the forming groove (4).

5. The bicycle frame bending device according to claim 1, characterized in that, The positioning component (6) includes a fixed seat (6-1), which is fixed to one side surface of the forming seat (3). An internal threaded block (6-2) is rotatably fitted inside the fixed seat (6-1). An adjusting stud (6-5) is connected to the internal threaded block (6-2) by a threaded engagement. A positioning plate (6-3) is fixedly connected to one end of the adjusting stud (6-5).

6. The bicycle frame bending device according to claim 5, characterized in that, The positioning plate (6-3) is located at one end of the forming groove (4). A plurality of reinforcing rods (6-4) are provided on the side surface of the positioning plate (6-3). One end of the reinforcing rod (6-4) is movably fitted into the fixed seat (6-1).

7. A bicycle frame bending processing device according to claim 5, characterized in that, The outer surface of the internal threaded block (6-2) has a polygonal structure.

8. A bicycle frame bending processing device according to claim 3, characterized in that, The second bending block (5-7) can rotate 90° via the worm gear (5-9) and the worm wheel (5-8).

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