Cutting device for machining of a bicycle crank and method thereof

Abstract

The present application relates to the field of crank processing, especially to a cutting device and method for bicycle crank processing. The cutting device and method for bicycle crank processing comprises a workbench, two sets of clamping and conveying assemblies, a distance adjusting assembly, a cutting assembly and a lifting assembly. The two sets of clamping and conveying assemblies are arranged oppositely on the top of the workbench for clamping and conveying aluminum bars for bicycle crank processing. The distance adjusting assembly is arranged below the workbench. The cutting device and method for bicycle crank processing provided by the present application comprises a distance adjusting assembly composed of a bidirectional screw rod, a threaded block, a driving gear, a driven gear and the like. The second driving member drives the gear to drive the bidirectional screw rod to rotate. The guiding and limiting action of the slide rod and the slide block can realize stepless and accurate adjustment of the distance between the two sets of clamping and conveying assemblies. The device can flexibly adapt to the processing requirements of aluminum bars of different diameters without replacing the clamp, greatly improving the universality and debugging efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of crank machining, and more particularly to a cutting device and method for machining bicycle cranks. Background Technology

[0002] In the bicycle manufacturing industry, the crank, as a key component connecting the pedals and sprockets, directly affects the riding experience and safety of the bicycle. Currently, bicycle cranks typically use high-quality aluminum alloy as the starting material. This aluminum alloy first undergoes ingot forming, a specific process that transforms the raw material into ingots of a specific shape for subsequent processing. Next, an extrusion process is performed, where the ingots undergo plastic deformation under strong pressure to obtain aluminum with a specific cross-sectional shape. Following this is a stretching operation, which further alters the shape and size of the aluminum, bringing it closer to the desired form. After this series of complex processes, aluminum rods are produced. Once formed, the aluminum rods are cut to appropriate lengths, creating multiple semi-finished products of equal length for further processing. These semi-finished products then undergo a series of meticulous processes such as turning, drilling, threading, and polishing, ultimately becoming finished cranks that meet quality standards and design requirements. Currently, aluminum rod cutting devices for bicycle crank processing still have many technical defects: First, poor adaptability. Most existing devices are designed with fixed spacing, which cannot flexibly adapt to the processing needs of aluminum rods of different diameters. When changing the aluminum rod model, it is necessary to readjust or even replace the clamp, which is cumbersome and inefficient. Second, insufficient cutting accuracy. Traditional cutting devices lack a stable clamping and positioning structure. During the aluminum rod transportation process, the timing belt is prone to slippage and offset, resulting in positioning deviation. Moreover, the aluminum rod is prone to axial or radial displacement during cutting, causing problems such as tilted cut and inconsistent semi-finished product length, which seriously affects the subsequent crank processing accuracy.

[0003] Therefore, it is necessary to provide a new cutting device and method for processing bicycle cranks to solve the above-mentioned technical problems. Summary of the Invention

[0004] To overcome the shortcomings of the existing technology, a cutting device and method for processing bicycle cranks are provided to solve the above-mentioned problems.

[0005] The present invention provides a cutting device and method for processing bicycle cranks, comprising: a worktable, two sets of clamping and conveying assemblies, an adjusting assembly, a cutting assembly, and a lifting assembly; the two sets of clamping and conveying assemblies are arranged opposite each other on the top of the worktable for clamping and conveying aluminum rods for processing bicycle cranks; the adjusting assembly is located below the worktable and is connected to the two sets of clamping and conveying assemblies for transmission, and can adjust the distance between the two sets of clamping and conveying assemblies according to the diameter of the aluminum rod to adapt to the clamping and conveying requirements of aluminum rods of different specifications; the cutting assembly is located on one side of the bottom of the worktable, and the cutting end of the cutting assembly corresponds to the aluminum rod cutting position of the worktable; the lifting assembly is located at the bottom of the worktable and is connected to the cutting assembly for driving the cutting assembly to move up and down in the vertical direction to cut the aluminum rod on the worktable; the clamping and conveying assembly includes two oppositely arranged mounting shells, each of which has an opening on its relatively close side, and a clamping plate is installed in each of the two openings, with a gap reserved between the two ends of the clamping plate and the inner sidewall of the mounting shell.

[0006] Preferably, each of the two mounting housings has a drive roller installed on the side that is relatively far apart from the other, and each of the two mounting housings has a driven roller installed on both sides of the clamping plate. Guide rollers are installed on the side of the drive rollers that are close to the two driven rollers.

[0007] Preferably, the driving roller is connected to the outer side of the two driven rollers via a synchronous belt drive, and the two guide rollers abut against the outer side of the synchronous belt. A first driving member for driving the driving roller to rotate is installed on the top of the two mounting shells respectively.

[0008] Preferably, the adjusting assembly includes two fixed plates mounted opposite to the bottom of the worktable, with a bidirectional screw rotatably connected between the two fixed plates. Both outer ends of the bidirectional screw are threaded with threaded blocks. A drive gear is rotatably connected to one side of one of the fixed plates, and a driven gear is meshed with the top of the drive gear. The driven gear is mounted on one outer end of the bidirectional screw. A second driving component for driving the drive gear to rotate is mounted on the side of the fixed plate away from the drive gear.

[0009] Preferably, both sides of the bidirectional screw are provided with slide rods, both ends of the two slide rods are connected to two fixed plates, both outer ends of the two slide rods are slidably connected to sliders, and both ends of the two threaded blocks are connected to the two sliders respectively through connecting rods.

[0010] Preferably, each slider is connected to a traction rod at its top, and the worktable has multiple traction grooves for the traction rods to slide in. The bottoms of the two mounting shells are respectively connected to the tops of the two traction rods.

[0011] Preferably, the cutting assembly includes a support platform located below the worktable. A support plate is connected to the top side of the support platform, and a cutting blade is connected to the top side of the support plate via a connecting shaft. A cutting groove for the cutting blade to pass through is provided on the worktable.

[0012] Preferably, a first gear is mounted on the outer side of the connecting shaft, a second gear is disposed below the first gear, the first gear and the second gear are connected by a synchronous belt drive, and a third driving component for driving the second gear to rotate is mounted on the bottom of the support platform.

[0013] Preferably, the lifting assembly includes an electric push rod installed at the bottom of the worktable, the output end of the electric push rod being connected to the top of the support platform, and telescopic rods being installed around the top of the support platform, with the top of each telescopic rod being connected to the bottom of the worktable.

[0014] Preferably, in step one, parameter preset and device debugging, according to the diameter of the aluminum rod corresponding to the bicycle crank to be processed, the second drive of the pitch adjustment component is started. The second drive drives the active gear to rotate. The active gear meshes and drives the driven gear and the bidirectional screw to rotate synchronously. The bidirectional screw drives the slider to slide along the slide bar through the threaded block and the connecting rod. Then, the distance between the two sets of clamping and conveying components is adjusted by the traction rod so that the preset clamping gap between the clamping plate and the surface of the aluminum rod meets the adaptation requirements. Step 2: Aluminum rod loading and clamping positioning. Place the aluminum rod for bicycle crank processing between two sets of clamping and conveying components, so that the two ends of the aluminum rod are in contact with the surfaces of the synchronous belts inside the two sets of mounting housings. Start the first drive unit. The two first drive units drive the corresponding active rollers to rotate synchronously in opposite directions. The active rollers drive the driven rollers to rotate through the synchronous belt. The guide rollers tension and limit the synchronous belt. The friction of the synchronous belts on both sides drives the aluminum rod to be conveyed to the cutting station in a preset direction. When the aluminum rod is conveyed to the preset position of the cutting station, the first drive unit stops. The clamping plate and the synchronous belt cooperate to achieve bidirectional clamping and positioning of the aluminum rod. Step 3: Aluminum bar cutting operation. Activate the third drive unit of the cutting assembly. The third drive unit drives the second gear to rotate, which in turn drives the first gear and connecting shaft to rotate via a synchronous belt, thereby causing the cutting blade to rotate at high speed. Simultaneously, activate the electric push rod of the lifting assembly. The electric push rod pushes the support platform vertically upward along the guide direction of the telescopic rod, causing the high-speed rotating cutting blade to move upward to the aluminum bar cutting position, completing the precise cutting of the aluminum bar. Step 4: Unloading operation. After cutting, the electric push rod drives the support table and cutting components to descend vertically and reset, and the third drive component stops working; the first drive component starts again, driving the synchronous belt to continue conveying the aluminum rod, and transporting the cut aluminum rod semi-finished product to the unloading area.

[0015] Compared with related technologies, the cutting device and method for processing bicycle cranks provided by the present invention have the following advantages: This invention, by setting up an adjustable distance assembly consisting of a bidirectional screw, a threaded block, a driving gear, and a driven gear, utilizes a second driving component to drive the gear transmission to rotate the bidirectional screw. Combined with the guiding and limiting functions of the slide bar and the slider, it can achieve stepless and precise adjustment of the distance between the two sets of clamping and conveying assemblies. It can flexibly adapt to the processing needs of aluminum bars of different diameters without the need to change the fixtures, greatly improving the equipment's versatility and debugging efficiency.

[0016] The clamping and conveying assembly of this invention adopts an integrated structure of "synchronous belt + clamping plate". The clamping plate is located inside the synchronous belt and cooperates with the synchronous belt to form bidirectional clamping and positioning. At the same time, the gap reserved at both ends of the clamping plate provides a stable installation space for the driven roller. The guide roller tensions and limits the synchronous belt, effectively avoiding synchronous belt deviation, slippage and aluminum rod displacement during the conveying process, ensuring the positioning accuracy of the aluminum rod when it is conveyed to the cutting station, and ensuring the flatness of the cut and the consistency of the semi-finished product length. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of the cutting device and method for processing bicycle cranks provided by the present invention; Figure 2 for Figure 1 The diagram shown is a structural schematic viewed from below. Figure 3 for Figure 1 The diagram shows the structure of the clamping and conveying assembly. Figure 4 for Figure 1 The diagram shows the structure of the adjustable distance assembly; Figure 5 for Figure 1 The diagram shows the structure of the cutting assembly. Figure 6 for Figure 1 The diagram shows the structure of the lifting assembly.

[0018] Labels in the diagram: 1. Workbench; 2. Mounting housing; 21. Clamping plate; 22. Driving roller; 23. Driven roller; 24. Guide roller; 3. Fixing plate; 31. Bidirectional screw; 32. Threaded block; 33. Driving gear; 34. Driven gear; 35. Slide rod; 36. Slider; 37. Traction rod; 4. Support platform; 41. Support plate; 42. Cutting blade; 43. First gear; 44. Second gear; 5. Electric push rod; 51. Telescopic rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] This invention provides a cutting device and method for processing bicycle cranks. The device and method include: a worktable 1, two sets of clamping and conveying assemblies, an adjusting assembly, a cutting assembly, and a lifting assembly. The two sets of clamping and conveying assemblies are arranged opposite each other on the top of the worktable 1 for clamping and conveying aluminum rods for processing bicycle cranks. The adjusting assembly is located below the worktable 1 and is connected to the two sets of clamping and conveying assemblies, allowing adjustment of the distance between the two sets of clamping and conveying assemblies according to the diameter of the aluminum rod, to accommodate the clamping and conveying requirements of aluminum rods of different specifications. The cutting assembly is located on one side of the bottom of the worktable 1, with its cutting end corresponding to the aluminum rod cutting position on the worktable 1. The lifting assembly is located at the bottom of the worktable 1 and connected to the cutting assembly for driving the cutting. The assembly moves vertically up and down to cut the aluminum rod on the workbench 1. The clamping and conveying assembly includes two opposing mounting shells 2. Each mounting shell 2 has an opening on its relatively close side, and a clamping plate 21 is installed in each of the two openings. A gap is reserved between the two ends of the clamping plate 21 and the inner sidewall of the mounting shell 2. A drive roller 22 is installed on the relatively far side of each mounting shell 2. A driven roller 23 is installed on both sides of the clamping plate 21 in each mounting shell 2. A guide roller 24 is installed on the side of the drive roller 22 close to the two driven rollers 23. The drive roller 22 is connected to the outer side of the two driven rollers 23 by a synchronous belt drive. The two guide rollers 24 abut against the outer side of the synchronous belt. A first driving member for driving the drive roller 22 to rotate is installed on the top of each of the two mounting shells 2.

[0022] It should be noted that the cutting device includes a worktable 1, two sets of clamping and conveying assemblies, an adjusting assembly, a cutting assembly, and a lifting assembly. These components work together to achieve precise clamping, adaptive conveying, and efficient cutting of the aluminum rod. The two sets of clamping and conveying assemblies are arranged opposite each other on the top of the worktable 1 and are the core structure for stable conveying and positioning of the aluminum rod. Specifically, they include two opposing mounting shells 2, each with an opening on its closest side. A clamping plate 21 is installed within each opening, and the clamping plate 21 is located inside the synchronous belt for use with… The aluminum rod forms a bidirectional abutment on its side, and a gap is reserved between the two ends of the clamping plate 21 and the inner wall of the mounting shell 2. This gap provides space for the installation of the driven roller 23, ensuring that the driven roller 23 can be stably assembled and rotate normally. A drive roller 22 is installed on the side of each mounting shell 2 that is relatively far from the clamping plate 21, and driven rollers 23 are correspondingly installed on both sides of the clamping plate 21. Guide rollers 24 are installed on the side of the drive roller 22 closest to the two driven rollers 23. The drive roller 22 is connected to the outer side of the two driven rollers 23 on the corresponding side via a synchronous belt drive. 4. It abuts against the outside of the synchronous belt to achieve tensioning and limiting of the synchronous belt, preventing the synchronous belt from deviating or slipping during the conveying process; the first driving component installed on the top of the two mounting shells 2 is a servo motor. The two servo motors achieve synchronous reverse rotation through the controller and the speed can be synchronously steplessly adjusted. Its power is transmitted to the synchronous belt through the active roller 22, and then the friction of the synchronous belts on both sides drives the aluminum rod to be smoothly conveyed to the cutting station along the preset direction. It forms an integrated structure of "conveying + clamping" with the clamping plate 21 on the inner side; the distance adjustment component is set below the worktable 1 and is connected to the two sets of clamping and conveying components. It can flexibly adjust the distance between the two sets of clamping and conveying components according to the diameter of the aluminum rod, and adapt to the clamping and conveying requirements of aluminum rods of different specifications; the cutting component is set on one side of the bottom of the worktable 1, and its cutting end is set with the aluminum rod cutting station of the worktable 1 to realize the cutting and separation of the aluminum rod; the lifting component is set at the bottom of the worktable 1 and connected to the cutting component. It is used to drive the cutting component to move up and down in the vertical direction, accurately control the cutting depth and cutting stroke, and finally realize the efficient and accurate cutting of the aluminum rod on the worktable 1.

[0023] In an embodiment of the present invention, the pitch adjustment assembly includes two fixed plates 3 mounted opposite to the bottom of the workbench 1. A bidirectional screw 31 is rotatably connected between the two fixed plates 3. Threaded blocks 32 are threaded to both outer ends of the bidirectional screw 31. A drive gear 33 is rotatably connected to one side of one of the fixed plates 3. A driven gear 34 is meshed with the top of the drive gear 33. The driven gear 34 is installed at one outer end of the bidirectional screw 31. A second driving member for driving the drive gear 33 to rotate is installed on the side of the fixed plate 3 away from the drive gear 33. Slide rods 35 are provided on both sides of the bidirectional screw 31. Both ends of the two slide rods 35 are connected to the two fixed plates 3. Sliding blocks 36 are slidably connected to both outer ends of the two slide rods 35. Both ends of the two threaded blocks 32 are connected to the two sliding blocks 36 respectively through connecting rods. A traction rod 37 is connected to the top of each sliding block 36. Multiple traction grooves for sliding of the traction rods 37 are provided on the workbench 1. The bottoms of the two mounting shells 2 are respectively connected to the tops of the two traction rods 37.

[0024] It should be noted that the pitch adjustment assembly includes two fixed plates 3 mounted opposite each other on the bottom of the worktable 1. A bidirectional screw 31 is rotatably connected between the two fixed plates 3. Threaded blocks 32 are threaded to both outer ends of the bidirectional screw 31. A drive gear 33 is rotatably connected to one side of one of the fixed plates 3. A driven gear 34 is meshed with the top of the drive gear 33, and the driven gear 34 is fixedly mounted to one outer end of the bidirectional screw 31. A second driving component (preferably a stepper motor with precise angle control capability) is installed on the side of the fixed plate 3 away from the drive gear 33 to drive its rotation. To ensure the smoothness of the pitch adjustment and For precision, two parallel sliding rods 35 are arranged on both sides of the bidirectional screw 31. Both ends of the two sliding rods 35 are fixedly connected to two fixed plates 3, and the outer ends of the two sliding rods 35 are slidably connected to sliders 36. Both ends of the two threaded blocks 32 are fixedly connected to the corresponding sliders 36 through connecting rods, forming a linkage structure of "screw-threaded block-connecting rod-slider". The top of each slider 36 is vertically connected to a traction rod 37. Multiple traction grooves adapted to the traction rods 37 are opened on the worktable 1. The traction rods 37 pass through the traction grooves and can slide along the grooves. The bottoms of the two mounting shells 2 are fixedly connected to the tops of the corresponding traction rods 37. During operation, the second driving component drives the active gear 33 to rotate. The active gear 33 meshes with and drives the driven gear 34 and the bidirectional screw 31 to rotate synchronously. Since the threads at both ends of the bidirectional screw 31 rotate in opposite directions, its rotation will cause the threaded blocks 32 on both sides to move closer or further apart along the screw axis. The threaded blocks 32 drive the slider 36 to slide smoothly along the slide bar 35 through the connecting rod, and then drive the two sets of clamping and conveying components to move synchronously along the traction groove of the worktable 1 through the traction rod 37. Finally, the precise adjustment of the distance between the two sets of clamping and conveying components is achieved to adapt to the clamping and conveying requirements of aluminum bars of different diameters. Moreover, the cooperation between the slide bar 35 and the slider 36 can effectively limit the rotation of the threaded blocks 32 with the bidirectional screw 31, ensuring the linear motion accuracy of the distance adjustment.

[0025] In an embodiment of the present invention, the cutting assembly includes a support platform 4 located below the workbench 1. A support plate 41 is connected to the top side of the support platform 4, and a cutting blade 42 is connected to the top side of the support plate 41 via a connecting shaft. A cutting groove for the cutting blade 42 to pass through is provided on the workbench 1. A first gear 43 is installed on the outside of the connecting shaft, and a second gear 44 is provided below the first gear 43. The first gear 43 and the second gear 44 are connected by a synchronous belt drive. A third driving member for driving the second gear 44 to rotate is installed at the bottom of the support platform 4.

[0026] It should be noted that the cutting assembly includes a support platform 4 located below the worktable 1. A support plate 41 is vertically fixed to one side of the top of the support platform 4. A cutting blade 42 is rotatably connected to one side of the top of the support plate 41 via a connecting shaft. A cutting groove is provided on the worktable 1 corresponding to the movement trajectory of the cutting blade 42. The cutting groove allows the cutting blade 42 to pass through vertically, ensuring that the cutting blade 42 can smoothly contact and cut the aluminum rod on the worktable 1. A first gear 43 is fixedly installed on the outside of the connecting shaft. A second gear 44 is correspondingly arranged below the first gear 43. The first gear 43 and the second gear 44 are connected by a synchronous belt drive. A third driving component (preferably a high-speed variable frequency motor with high speed stability and power output efficiency) is fixedly installed at the bottom of the support platform 4 to drive the second gear 44 to rotate. During operation, the third drive unit starts and drives the second gear 44 to rotate. The second gear 44 transmits power to the first gear 43 through a synchronous belt, causing the first gear 43 and the connecting shaft to rotate synchronously, thereby driving the cutting blade 42 to rotate at high speed and generating cutting power. In conjunction with the lifting component, the support table 4 drives the entire cutting assembly to rise vertically, so that the high-speed rotating cutting blade 42 moves upward through the cutting groove on the worktable 1 and precisely acts on the cutting position of the aluminum rod, achieving efficient and flat cutting of the aluminum rod. The synchronous belt drive structure can ensure the synchronization of the rotation speed of the first gear 43 and the second gear 44, reduce power transmission loss, ensure that the cutting blade 42 always maintains a stable rotation speed, and improve the cutting quality and cutting efficiency.

[0027] In an embodiment of the present invention, the lifting assembly includes an electric push rod 5 installed at the bottom of the worktable 1. The output end of the electric push rod 5 is connected to the top of the support platform 4. Telescopic rods 51 are installed around the top of the support platform 4, and the top of each telescopic rod 51 is connected to the bottom of the worktable 1.

[0028] It should be noted that the lifting assembly includes an electric push rod 5 fixedly installed at the bottom of the workbench 1. The output end of the electric push rod 5 extends vertically downward and is fixedly connected to the top of the support platform 4 of the cutting assembly, providing stable power for the lifting of the cutting assembly. To ensure the stability and verticality of the support platform 4 during the lifting process, telescopic rods 51 are symmetrically installed around the top of the support platform 4. The top of each telescopic rod 51 is fixedly connected to the bottom of the workbench 1, forming a stable support structure of "central power + four-sided guidance". During operation, when a cutting operation is required, the output end of the electric push rod 5 retracts, pulling the support platform 4 and the entire cutting assembly upwards along the guide direction of the telescopic rod 51, allowing the high-speed rotating cutting blade 42 to precisely approach and cut the aluminum rod through the cutting groove on the worktable 1. After cutting, the output end of the electric push rod 5 extends, pushing the support platform 4 and the cutting assembly to descend vertically and reset, preparing for the next cutting operation. The telescopic rods 51 distributed around the perimeter effectively limit the horizontal deviation of the support platform 4, ensuring that the cutting assembly remains vertical during the lifting process, preventing the cutting blade 42 from deviating from the cutting position of the aluminum rod, thereby ensuring the verticality and cutting accuracy of the cut, while also sharing the load of the electric push rod 5, improving the stability of the lifting action and the service life of the equipment.

[0029] In an embodiment of the present invention, step one, parameter preset and device debugging, involves activating the second drive component of the pitch adjustment assembly according to the diameter of the aluminum rod corresponding to the bicycle crank to be processed. The second drive component drives the drive gear 33 to rotate, which in turn drives the driven gear 34 and the bidirectional screw 31 to rotate synchronously. The bidirectional screw 31 drives the slider 36 to slide along the slide bar 35 through the threaded block 32 and the connecting rod, thereby adjusting the distance between the two sets of clamping and conveying components through the traction rod 37, so that the preset clamping gap between the clamping plate 21 and the surface of the aluminum rod meets the adaptation requirements. Step two, aluminum rod loading and clamping positioning, involves placing the aluminum rod for processing the bicycle crank between the two sets of clamping and conveying components, so that the two ends of the aluminum rod are correspondingly attached to the synchronous belt surfaces inside the two sets of mounting shells 2. The first drive component is activated, and the two first drive components drive the corresponding side drive rollers 22 to rotate synchronously in opposite directions. The drive rollers 22 drive the driven rollers 23 to rotate through the synchronous belt, and the guide rollers 24 tension and limit the synchronous belt. The friction of the synchronous belt drives the aluminum rod to be conveyed to the cutting station along a preset direction. When the aluminum rod is conveyed to the preset position of the cutting station, the first drive unit stops, and the clamping plate 21 cooperates with the synchronous belt to achieve bidirectional clamping and positioning of the aluminum rod. Step 3: Aluminum rod cutting operation. The third drive unit of the cutting component is started. The third drive unit drives the second gear 44 to rotate. The second gear 44 drives the first gear 43 and the connecting shaft to rotate through the synchronous belt, thereby driving the cutting blade 42 to rotate at high speed. The electric push rod 5 of the lifting component is started at the same time. The electric push rod 5 pushes the support platform 4 to rise vertically along the guide direction of the telescopic rod 51, so that the high-speed rotating cutting blade 42 moves upward to the aluminum rod cutting station, completing the precise cutting of the aluminum rod. Step 4: Unloading operation. After the cutting is completed, the electric push rod 5 drives the support platform 4 and the cutting component to descend vertically to reset, and the third drive unit stops working. The first drive unit starts again, driving the synchronous belt to continue conveying the aluminum rod, and conveying the cut aluminum rod semi-finished product to the unloading area.

[0030] It should be noted that during step one, parameter preset and device debugging, the second drive component of the torque adjustment assembly is activated according to the diameter of the aluminum rod corresponding to the bicycle crank to be processed. The second drive component drives the drive gear 33 to rotate, and the drive gear 33 drives the driven gear 34 and the bidirectional screw 31 to rotate synchronously through meshing transmission (the drive gear 33 and the driven gear 34 cooperate to realize power transmission and steering conversion, ensuring that the bidirectional screw 31 is stably stressed); the bidirectional screw 31 uses the reverse threads at both ends to drive the threaded block 32 to move along the screw axis, and the threaded block 32 drives the slider 36 to slide smoothly along the slide bar 35 through the connecting rod (the slide bar 35 and the slider 36 cooperate to restrict the threaded block 32 from rotating with the screw, ensuring precise movement). (Accuracy), and then through the traction rod 37, drive the two sets of clamping and conveying components to move synchronously, and finally adjust the distance between the two sets of clamping and conveying components so that the clamping plate 21 and the surface of the aluminum rod form a suitable preset clamping gap, laying the foundation for subsequent stable clamping and conveying; Step 2, when loading and clamping the aluminum rod, place the aluminum rod for processing bicycle cranks between the two sets of clamping and conveying components, so that the two ends of the aluminum rod are in contact with the synchronous belt surface inside the two sets of mounting shells 2, start the first drive component (servo motor), and the two first drive components drive the corresponding side active rollers 22 to rotate synchronously in opposite directions. The active rollers 22 drive the driven rollers 23 to rotate through the synchronous belt (the active rollers 22 provide power input, and the driven rollers 23 cooperate to support the synchronous belt). To ensure conveying stability, guide roller 24 tensions and limits the synchronous belt to prevent it from shifting or slipping during transport. The friction between the synchronous belts on both sides and the aluminum rod drives the aluminum rod to be conveyed towards the cutting station in a preset direction. When the aluminum rod reaches the preset position at the cutting station, the first drive unit pauses, and the clamping plate 21, in conjunction with the synchronous belt, forms a bidirectional clamping and positioning mechanism from both sides of the aluminum rod to prevent displacement during cutting. In step three, during the aluminum rod cutting operation, the third drive unit of the cutting assembly is activated. The third drive unit drives the second gear 44 to rotate, and the second gear 44 transmits power to the first gear 43 via the synchronous belt, causing the first gear 43 and the connecting shaft to rotate synchronously, thereby driving the cutting blade 42 to rotate at high speed. The cutting power is generated; the electric push rod 5 of the lifting component is started synchronously, and the electric push rod 5 provides the lifting driving force, pushing the support platform 4 to rise vertically along the guide direction of the telescopic rod 51 (the telescopic rod 51 ensures that the support platform 4 rises and falls smoothly and avoids the cutting blade 42 from deviating), so that the high-speed rotating cutting blade 42 moves upward to the aluminum bar cutting position, and accurately completes the cutting of the aluminum bar; in the fourth step, during the unloading operation, after the cutting is completed, the electric push rod 5 drives the support platform 4 and the cutting component to fall vertically and reset, and the third driving component stops working; the first driving component starts again, driving the synchronous belt to continue to run, and transporting the cut aluminum bar semi-finished product to the unloading area. Repeating steps two to four can realize the continuous batch cutting of aluminum bars.

[0031] The circuits and controls involved in this invention are all existing technologies and will not be described in detail here.

[0032] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A cutting device for processing bicycle cranks, characterized in that, include: Workbench (1), two sets of clamping and conveying components, spacing adjustment components, cutting components and lifting components; The two sets of clamping and conveying assemblies are arranged opposite to each other on the top of the workbench (1) for clamping and conveying aluminum rods for processing bicycle cranks; The adjustable distance component is located below the worktable (1). The adjustable distance component is connected to two sets of clamping and conveying components. It can adjust the distance between the two sets of clamping and conveying components according to the diameter of the aluminum rod to adapt to the clamping and conveying requirements of aluminum rods of different specifications. The cutting assembly is located on one side of the bottom of the workbench (1), and the cutting end of the cutting assembly is set in the aluminum rod cutting station of the workbench (1). The lifting assembly is located at the bottom of the workbench (1) and connected to the cutting assembly. It is used to drive the cutting assembly to move up and down in the vertical direction so as to cut the aluminum rod on the workbench (1). The clamping and conveying assembly includes two opposing mounting shells (2). Each of the two mounting shells (2) has an opening on its relatively close side, and a clamping plate (21) is installed in each of the two openings. A gap is reserved between the two ends of the clamping plate (21) and the inner sidewall of the mounting shell (2).

2. The cutting device for processing bicycle cranks according to claim 1, characterized in that, Both of the two mounting shells (2) have a drive roller (22) installed on the side that is far away from each other. Both of the two mounting shells (2) have a driven roller (23) installed on both sides of the clamping plate (21). The drive roller (22) has a guide roller (24) installed on the side that is close to the two driven rollers (23).

3. The cutting device for processing bicycle cranks according to claim 2, characterized in that, The active roller (22) is connected to the outer side of the two driven rollers (23) by a synchronous belt drive. The two guide rollers (24) are in contact with the outer side of the synchronous belt. The top of the two mounting shells (2) are respectively equipped with a first driving member for driving the active roller (22) to rotate.

4. The cutting device for processing bicycle cranks according to claim 1, characterized in that, The adjustment assembly includes two fixed plates (3) mounted opposite to the bottom of the worktable (1). A bidirectional screw (31) is rotatably connected between the two fixed plates (3). Threaded blocks (32) are threaded to both outer ends of the bidirectional screw (31). A drive gear (33) is rotatably connected to one side of one of the fixed plates (3). A driven gear (34) is meshed with the top of the drive gear (33). The driven gear (34) is mounted on one outer end of the bidirectional screw (31). A second drive member for driving the drive gear (33) to rotate is installed on the side of the fixed plate (3) away from the drive gear (33).

5. The cutting device for processing bicycle cranks according to claim 4, characterized in that, Both sides of the bidirectional screw (31) are provided with slide rods (35), and both ends of the two slide rods (35) are connected to two fixed plates (3). Both outer ends of the two slide rods (35) are slidably connected with sliders (36), and both ends of the two threaded blocks (32) are connected to the two sliders (36) respectively through connecting rods.

6. The cutting device for processing bicycle cranks according to claim 5, characterized in that, Each slider (36) is connected to a traction rod (37) at its top. The workbench (1) has multiple traction grooves for the traction rods (37) to slide. The bottoms of the two mounting shells (2) are respectively connected to the tops of the two traction rods (37).

7. The cutting device for processing bicycle cranks according to claim 1, characterized in that, The cutting assembly includes a support platform (4), which is located below the workbench (1). A support plate (41) is connected to the top side of the support platform (4), and a cutting blade (42) is connected to the top side of the support plate (41) via a connecting shaft. A cutting groove for the cutting blade (42) to pass through is provided on the workbench (1).

8. The cutting device for processing bicycle cranks according to claim 7, characterized in that, A first gear (43) is installed on the outside of the connecting shaft, and a second gear (44) is provided below the first gear (43). The first gear (43) and the second gear (44) are connected by a synchronous belt drive. A third driving component for driving the second gear (44) to rotate is installed at the bottom of the support platform (4).

9. The cutting device for processing bicycle cranks according to claim 8, characterized in that, The lifting assembly includes an electric push rod (5) installed at the bottom of the worktable (1). The output end of the electric push rod (5) is connected to the top of the support platform (4). Telescopic rods (51) are installed around the top of the support platform (4). The top of each telescopic rod (51) is connected to the bottom of the worktable (1).

10. A cutting method for processing bicycle cranks as described in any one of claims 1 to 9, characterized in that, The method includes the following steps; Step 1: Parameter preset and device debugging. According to the diameter of the aluminum rod corresponding to the bicycle crank to be processed, start the second drive of the pitch adjustment component. The second drive drives the active gear (33) to rotate. The active gear (33) meshes and drives the driven gear (34) and the bidirectional screw (31) to rotate synchronously. The bidirectional screw (31) drives the slider (36) to slide along the slide bar (35) through the threaded block (32) and the connecting rod. Then, the distance between the two sets of clamping and conveying components is adjusted through the traction rod (37) so that the preset clamping gap between the clamping plate (21) and the surface of the aluminum rod meets the adaptation requirements. Step 2: Aluminum rod loading and clamping positioning. Place the aluminum rod for bicycle crank processing between two sets of clamping and conveying components, so that the two ends of the aluminum rod are in contact with the synchronous belt surface inside the two sets of mounting shells (2). Start the first drive component. The two first drive components drive the corresponding side active rollers (22) to rotate synchronously in opposite directions. The active rollers (22) drive the driven rollers (23) to rotate through the synchronous belt. The guide rollers (24) tension and limit the synchronous belt. The aluminum rod is driven to be conveyed to the cutting station along the preset direction by the friction of the synchronous belts on both sides. When the aluminum rod is conveyed to the preset position of the cutting station, the first drive component stops. The clamping plate (21) and the synchronous belt cooperate to achieve bidirectional clamping and positioning of the aluminum rod. Step 3: Aluminum rod cutting operation. Start the third drive of the cutting assembly. The third drive drives the second gear (44) to rotate. The second gear (44) drives the first gear (43) and the connecting shaft to rotate through the synchronous belt, thereby driving the cutting blade (42) to rotate at high speed. Simultaneously start the electric push rod (5) of the lifting assembly. The electric push rod (5) pushes the support platform (4) to rise vertically along the guide direction of the telescopic rod (51), so that the high-speed rotating cutting blade (42) moves upward to the aluminum rod cutting position, completing the precise cutting of the aluminum rod. Step 4: Unloading operation. After the cutting is completed, the electric push rod (5) drives the support table (4) and the cutting assembly to descend vertically and reset. The third drive component stops working. The first drive component starts again, driving the synchronous belt to continue conveying the aluminum rod and transporting the cut aluminum rod semi-finished product to the unloading area.

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