Spoke automatic punching hole die

Abstract

The application discloses a spoke automatic punching hole die, and belongs to the spoke processing field.The spoke automatic punching hole die comprises an upper die installed on a punching machine and a lower die oppositely arranged with the upper die, a ratchet mechanism is arranged on the top of the lower die, a rotating disc for installing and positioning the spoke is arranged on the ratchet mechanism, a punching protrusion for cooperating with the arc-shaped edge bottom surface of the spoke is fixed on the top of the lower die, the rotating disc is obliquely arranged towards the punching protrusion, a punch is fixed on the bottom of the upper die, the punch is oppositely arranged with the punching protrusion, a crank connecting rod mechanism is connected with the upper die, one end of the crank connecting rod mechanism is connected with the ratchet mechanism, so that the ratchet mechanism drives the rotating disc to intermittently rotate in the die opening and closing process, and the processing position of the arc-shaped edge of the spoke is changed.The spoke automatic punching hole die does not need manual rotation of the spoke, the spoke is automatically made to intermittently rotate in the die opening and closing process, the processing position of the arc-shaped edge of the spoke is changed, the working efficiency is greatly improved, and the cost is low.

Description

Technical Field

[0001] This invention belongs to the field of wheel spoke processing, and particularly relates to an automated wheel spoke punching mold. Background Technology

[0002] Currently, the most widely used wheels on automobiles are steel wheels, which generally consist of two parts: the rim and the spokes. The rim and spokes are manufactured separately and then assembled and welded together. The geometry of the spokes consists of a mounting plane, a transition curve segment, and a straight section. The mounting plane has a center hole and bolt holes, and is fixed to the wheel hub with bolts. The straight section is welded to the rim. The transition curve segment connects the mounting plane and the straight section, and it has spoke vents. With the rapid development of the automotive industry, the product quality of spokes has received considerable attention, and spoke vents are a crucial factor affecting the performance of the spokes.

[0003] Existing wheel spoke punching molds require manual rotation of the wheel spokes or a separate drive structure to rotate them after punching the air holes once. This rotation changes the processing position of the wheel spoke's curved edge, and the punching process is repeated until the air holes are evenly distributed along the wheel spoke edge. Manual rotation of the wheel spokes results in low work efficiency, while a separate drive structure requires more electrical components, increasing costs. Summary of the Invention

[0004] The purpose of this invention is to provide an automated punching mold for wheel spokes, which eliminates the need for manual rotation of the wheel spokes. During the opening and closing of the mold, the wheel spokes are automatically rotated intermittently to change the processing position of the arc edge of the wheel spokes, greatly improving work efficiency and reducing costs.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This invention provides an automated punching die for wheel spokes, comprising an upper die mounted on a stamping press and a lower die opposite to the upper die. A ratchet mechanism is provided on the top of the lower die, and a turntable for mounting and positioning the wheel spokes is provided on the ratchet mechanism. A punching protrusion for engaging with the bottom surface of the arc-shaped edge of the wheel spoke is fixed on the top of the lower die. The turntable is inclined toward the punching protrusion. A punch is fixed on the bottom of the upper die, and the punch is opposite to the punching protrusion. The upper die is connected to a crank-connecting rod mechanism, one end of which is connected to the ratchet mechanism, so that during the opening and closing of the die, the ratchet mechanism drives the turntable to rotate intermittently, changing the processing position of the arc-shaped edge of the wheel spoke.

[0007] Preferably, the crank-connecting rod mechanism includes a first scorpion joint, a second scorpion joint, a sleeve, a slide rod assembly, a release assembly, a first bolt, a first crank, a bearing seat, a first rotating shaft, and a second crank. The top end of the slide rod assembly is connected to the first scorpion joint, which is movably connected to the upper mold. The slide rod assembly is inserted into the sleeve and can slide relative to the sleeve. At least one first slide rail is provided on the side wall of the sleeve. At least one first bolt is provided on the slide rod assembly, which passes through the first slide rail. A part of the release assembly is engaged inside the sleeve, and the other part of the release assembly is connected to the second scorpion joint. One end of the first crank is movably connected to the second scorpion joint. The bearing seat is fixed to the top of the lower mold. The first rotating shaft passes through the bearing seat, and one end of it is fixedly connected to the other end of the first crank, while the other end is fixedly connected to the second crank.

[0008] Preferably, the slide rod assembly includes a first rod, a first slider, a protruding rod, a first spring, and a second rod. The first rod is slidably connected to the sleeve. A sliding cavity is formed inside the first rod, and the first slider is slidably connected inside the sliding cavity. At least one second slide rail is formed on the side wall of the first rod. At least one protruding rod is fixed to the side wall of the first slider, and the protruding rod passes through the second slide rail. The second rod is fixed to the top of the first slider. The bottom end of the first spring abuts against the top of the first slider, and the top end of the first spring abuts against the top wall of the sliding cavity. The top end of the second rod passes through the first rod and is screwed to the first fisheye connector.

[0009] Preferably, the sidewall of the first rod is provided with at least two sets of threaded holes spaced apart along the length direction, each threaded hole communicating with the sliding cavity, the first bolt being screwed into the threaded hole and extending into the sliding cavity, and in the initial state, the bottom end of the first slider abutting against the first bolt.

[0010] Preferably, the tripping assembly includes a sleeve, a connecting seat, a second spring, a first abutment, a locking block, and a guide pin. An annular groove is formed on the inner wall of the lower part of the sleeve. The top of the second fisheye connector is screwed to the bottom of the sleeve. A portion of the connecting seat is screwed into the interior of the sleeve. A first receiving groove for accommodating the first abutment is formed inside the connecting seat. The first abutment can slide up and down along the first receiving groove. The upper part of the first abutment has a first inclined surface. The bottom end of the second spring abuts against the bottom wall inside the sleeve, and the top end of the second spring abuts against the bottom wall of the first abutment. A first sliding hole is formed on the side wall of the connecting seat, communicating with the first receiving groove. The locking block is slidably connected to the first sliding hole. The inner side wall of the locking block has a second inclined surface that cooperates with the first inclined surface. The locking block engages with the annular groove. A sliding groove communicating with the first sliding hole is formed on the top of the connecting seat. The guide pin is fixed to the locking block and slidably engages with the sliding groove.

[0011] Preferably, the ratchet mechanism includes a second rotating shaft, a bearing body, a connecting plate, a base plate, a ratchet disc, a pushing group, and a stopping group. The second rotating shaft is rotatably connected to the lower mold, the turntable is fixed to the top of the ratchet disc, the ratchet disc is fixed to the middle of the first rotating shaft, and multiple grooves are provided on the side wall of the ratchet disc. The lower part of the second rotating shaft is fixed with a bearing body, the bottom of the outer ring of the bearing body is fixed with a connecting plate, the base plate is fixed to the connecting plate, one end of the base plate is movably connected to the second crank, the top of the base plate is provided with a pushing group, and the top of the lower mold is fixed with a stopping group. The stopping end of the stopping group and the pushing end of the pushing group extend into different grooves respectively.

[0012] Preferably, the groove has an arc-shaped segment, a first planar segment, and a second planar segment. The arc-shaped segment is disposed on one side of the first planar segment, and the second planar segment is disposed on the other side of the first planar segment and is perpendicular to the first planar segment. The tangent angle of the arc-shaped segment is 120°-130°.

[0013] Preferably, the pushing assembly includes a first upright plate, a pin, a first mounting block, a pawl, a third spring, a second bolt, a limiting pin, a fourth spring, a second slider, a second abutment, a stop block, and a stop post. The first mounting block is rotatably connected to the base plate via the pin. The first upright plate is fixed to the front sidewall of the first mounting block. The first mounting block has a second sliding hole and a third sliding hole inside. A pawl is slidably connected inside the second sliding hole. A second receiving groove is formed inside the pawl. A portion of the second bolt is located on the front side of the first upright plate, and the other portion of the second bolt passes through the first upright plate and extends into the second receiving groove to be screwed to the pawl. The rear end of the third spring abuts against the rear sidewall of the second receiving groove. The front end of the third spring... The end abuts against the rear side wall of the first upright plate. A stop block is screwed into the rear side of the third sliding hole. The second slider is slidably connected to the third sliding hole, and the front end extends out of the third sliding hole to fix a second stop block. The second stop block has a horizontal part and an arc-shaped part. Both the left and right sides of the horizontal part have arc-shaped parts. A stop post is fixed on the base plate on the front side of the second stop block and on the base plate on the rear side of the first mounting block. The stop post on the rear side abuts against the rear side wall of the first mounting block, and the second stop block abuts against the stop post on the front side. The second slider has a fourth sliding hole. A limiting pin is fixed to the first mounting block and passes through the fourth sliding hole. The front end of the fourth spring abuts against the rear side wall of the second slider, and the rear end of the fourth spring abuts against the front side wall of the stop block.

[0014] Preferably, the stop assembly includes a second mounting block, a second upright plate, a stop claw, a fifth spring, and a third bolt. The second mounting block is fixed to the top wall of the lower mold, and the second upright plate is fixed to the front side wall of the second mounting block. A fifth sliding hole is provided inside the second mounting block, and a stop claw is slidably connected in the fifth sliding hole. A third receiving groove is provided inside the stop claw. A part of the third bolt is located on the front side of the second upright plate, and the other part of the third bolt passes through the second upright plate and extends to the third receiving groove to be screwed to the stop claw. The rear end of the fifth spring abuts against the rear side wall of the third receiving groove, and the front end of the fifth spring abuts against the rear side wall of the second upright plate.

[0015] Preferably, the lower mold is fixed with a guide post, and the upper mold is fixed with a guide sleeve that mates with the guide post.

[0016] Preferably, the top of the turntable has multiple positioning posts for positioning the spokes.

[0017] Preferably, both the punching protrusion and the lower die have through holes, and the through holes of the punching protrusion are connected to the through holes of the lower die.

[0018] Preferably, the second planar segment is a smooth surface.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. During the mold opening and closing process, the crank-connecting rod mechanism and ratchet mechanism work together to intermittently drive the turntable to rotate, which in turn drives the spokes to rotate intermittently, changing the processing position. The process of changing the processing position is completed during the punch's repositioning after leaving the spokes, without affecting the operation, resulting in high efficiency in punching air holes. Furthermore, the intermittent rotation of the spokes can be driven by the up-and-down movement of the upper mold, eliminating the need for additional electrical components to separately drive the turntable and its spokes, thus reducing costs. The ratchet mechanism also ensures reliable, accurate, and stable transmission.

[0021] 2. The first bolt and the first slide rail work together to buffer the flow and ensure the orderly movement of the air vents and the turntable, thus avoiding conflict.

[0022] 3. The overall length of the connecting rod part of the crank-connecting rod mechanism can be adjusted by the first fisheye joint and the second fisheye joint, so that the length is just matched with the stroke of the stamping machine.

[0023] 4. The first spring acts as a buffer and shock absorber, allowing for smooth acceleration during the rotation of the spokes and reducing damage to the components caused by the initial lifting force. Furthermore, it adjusts the length of the connecting rod section of the crank-connecting rod mechanism when the connecting rod section is slightly short, ensuring the safety of operators and the mold.

[0024] 5. The threaded holes, which are spaced apart, cooperate with the first bolt, so that the length of the second rod does not need to be adjusted when installing the mold, but only selected. It has a foolproof function in case of incorrect installation. The corresponding threaded hole design can reduce thinking and improve safety.

[0025] 6. The second fisheye connector and the sleeve are designed with a tripping component, which can disengage when the turntable fails to rotate for some reason or the press exceeds its stroke, preventing damage caused by rigid connection and improving safety.

[0026] 7. Since the second plane section is a smooth surface and the arc section has a large tangent angle, the force of the third spring of the pawl can be reliably applied to the ratchet disc, making it stable in position and meeting the error of 3mm for the air hole spacing.

[0027] 8. The pusher assembly has a safety pawl function. When the turntable stops rotating for some reason, the pawl will automatically spring open due to overload, avoiding safety accidents and increasing the safety of equipment and personnel; and reducing the mold loading time. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0029] Figure 2 This is a three-dimensional structural schematic diagram of the crank-connecting rod mechanism of the present invention.

[0030] Figure 3 This is a cross-sectional structural schematic diagram of the slide rod assembly of the present invention.

[0031] Figure 4 This is a three-dimensional structural diagram of the sleeve of the present invention.

[0032] Figure 5 This is a three-dimensional exploded view of the tripping component of the present invention.

[0033] Figure 6 This is a cross-sectional view of the tripping assembly of the present invention.

[0034] Figure 7 This is a cross-sectional structural schematic diagram of the connector of the present invention.

[0035] Figure 8 This is a schematic diagram of the cooperative structure of the first abutment block and the locking block of the present invention.

[0036] Figure 9 This is a three-dimensional structural diagram of the ratchet mechanism of the present invention.

[0037] Figure 10 This is a top view of the ratchet disk structure of the present invention.

[0038] Figure 11 This is a cross-sectional structural schematic diagram of the ratchet mechanism of the present invention.

[0039] Figure 12 This is a cross-sectional structural diagram of the actuator assembly of the present invention.

[0040] Figure 13 This is a cross-sectional structural schematic diagram of the stop assembly of the present invention.

[0041] Figure 14 This is a three-dimensional structural diagram of the turntable and positioning column of the present invention.

[0042] Figure 15 This is a three-dimensional structural diagram of the perforation of the present invention.

[0043] The labels in the attached diagram are as follows: 1-Upper mold, 2-Lower mold, 3-Crank connecting rod mechanism, 31-First fisheye joint, 32-Second fisheye joint, 33-Sleeve, 34-Slide rod assembly, 341-First rod, 342-First slider, 343-Protruding rod, 344-First spring, 345-Second rod, 346-Slide cavity, 347-Second slide rail, 348-Threaded hole, 35-Releasing assembly, 351-Sleeve, 352-Connecting seat, 353-Second spring, 354-First... 355-Clamping block, 356-Guide pin, 357-Annular groove, 358-First receiving groove, 359-First inclined surface, 3510-First sliding hole, 3511-Second inclined surface, 3512-Sliding groove, 36-First bolt, 37-First crank, 38-Bearing seat, 39-First rotating shaft, 310-Second crank, 311-First slide rail, 4-Turntable, 5-Punching protrusion, 6-Punch, 7-Ratchet mechanism, 71-Second rotating shaft, 72-Bearing body 73-Connecting plate, 74-Base plate, 75-Ratchet disc, 76-Push assembly, 761-First upright plate, 762-Pin shaft, 763-First mounting block, 764-Pawl, 765-Third spring, 766-Second bolt, 767-Limit pin, 768-Fourth spring, 769-Second slider, 7610-Second stop block, 76101-Horizontal part, 76102-Arc-shaped part, 7611-Stop block, 7612-Stop post, 7613-Second sliding hole, 76 14-Third sliding hole, 7615-Second receiving groove, 7616-Fourth sliding hole, 77-Stop assembly, 771-Second mounting block, 772-Second vertical plate, 773-Stop claw, 774-Fifth spring, 775-Third bolt, 776-Fifth sliding hole, 777-Third receiving groove, 78-Groove, 781-Arc segment, 782-First flat segment, 783-Second flat segment, 8-Guide post, 9-Guide sleeve, 10-Positioning post, 11-Through hole, 100-Spoke. Detailed Implementation

[0044] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0045] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0046] like Figures 1 to 15 As shown, this embodiment provides an automated punching die for a wheel spoke 100, including an upper die 1 installed on a stamping machine and a lower die 2 arranged vertically opposite to the upper die 1. The lower die 2 is fixed on a platform, and a ratchet mechanism 7 is provided on the top of the lower die 2. A turntable 4 for mounting and positioning the wheel spoke 100 is provided on the ratchet mechanism 7. In this embodiment, the top of the turntable 4 has five positioning pins 10 for positioning the wheel spoke 100. During installation, the wheel spoke 100 is placed on a placement plate, and is positioned by the positioning pins 10 on the placement plate passing through the bolt holes of the wheel spoke 100. A punching protrusion 5 for cooperating with the bottom surface of the arc-shaped edge of the wheel spoke 100 is fixed on the top of the lower die 2. Both the punching protrusion 5 and the lower die 2 have through holes 11. The through holes 11 of the punching protrusion 5 are connected to the through holes 11 of the lower die 2, so that waste material is discharged through the through holes 11. The turntable 4 is inclined toward the punching protrusion 5. In this embodiment, it is inclined downward from front to back. The bottom of the upper mold 1 is fixed with a punch 6. The punch 6 is opposite to the punching protrusion 5. The upper mold 1 is connected to a crank connecting rod mechanism 3. The lower end of the crank connecting rod mechanism 3 is connected to a ratchet mechanism 7 so that the ratchet mechanism 7 is pushed to drive the turntable 4 to rotate intermittently during the opening and closing of the mold, thereby changing the processing position of the arc edge of the spoke 100.

[0047] During the punching operation, the upper die 1 is moved up and down by the press to perform the die closing and opening actions. When the die is closed, the upper die 1 moves downwards, causing the punch 6 to move downwards to punch the spokes 100. During the closing process, the downward movement of the upper die 1 drives the crank-connecting rod mechanism 3, preparing for the rotation of the turntable 4. When the die is opened, the upper die 1 moves upwards, causing the punch 6 to move upwards and reset. During the opening process, the upward movement of the upper die 1 drives the crank-connecting rod mechanism 3, causing the turntable 4 to rotate, thus rotating the spokes 100 and changing the processing position of the curved edge of the spokes 100. In this way, the die can be opened and closed continuously during the punching operation without stopping the machine. During the opening and closing process, the crank-connecting rod mechanism 3 and the ratchet mechanism 7 work together to intermittently drive the turntable 4 to rotate, thereby causing the spokes 100 to rotate intermittently, changing the processing position. The process of changing the processing position is completed during the process of the punch 6 leaving the spokes 100 and resetting, without affecting the operation, resulting in high punching efficiency. Furthermore, the spokes 100 can be driven to rotate intermittently by the up-and-down movement of the upper mold 1, without the need for additional electrical components to drive the wheel disk and its spokes 100 to rotate intermittently, thus reducing costs. In addition, the ratchet mechanism 7 provides reliable, accurate, and stable transmission.

[0048] The crank-connecting rod mechanism 3 includes a first fisheye connector 31, a second fisheye connector 32, a sleeve 33, a slide rod assembly 34, a release assembly 35, a first bolt 36, a first crank 37, a bearing seat 38, a first rotating shaft 39, and a second crank 310. The top of the slide rod assembly 34 is connected to the first fisheye connector 31, which is movably connected to the upper mold 1. The slide rod assembly 34 is inserted into the sleeve 33 and can slide relative to the sleeve 33. A first slide rail 311 is opened on both the left and right side walls of the sleeve 33. Two first bolts 36 are provided on the slide rod assembly 34. The first bolts 36 pass through the first slide rail 311. Through the cooperation of the first bolts 36 and the first slide rail 311, the sliding distance of the slide rod assembly 34 in the sleeve 33 is limited. As the slide rod assembly 34 extends and retracts along the sleeve 33, when the upper mold 1 moves downward, the slide rod assembly 34 first moves downward and retracts into the sleeve 33 until the first bolt 36 moves downward to the bottom of the first slide rail 311. Only then does the upper mold 1 continue to move downward, pushing the sleeve 33 downward, causing the release assembly 35 to move downward. The upper part of the release assembly 35 is locked inside the sleeve 33, and the lower part of the release assembly 35 is connected to the second fisheye connector 32. The rear end of the first crank 37 is movably connected to the second fisheye connector 32. The bearing seat 38 is fixed to the top of the lower mold 2. The first rotating shaft 39 passes through the bearing seat 38, and its seat end is fixedly connected to the front end of the first crank 37. The right end is fixedly connected to the second crank 310. The downward movement of the release assembly 35 drives the second fisheye connector 32 to move downward, causing the first crank 37 to swing backward. This, in turn, drives the second crank 310 to swing backward via the first rotating shaft 39, performing the pre-push operation of the ratchet mechanism 7. When the upper die 1 moves upward, it first drives the slide rod assembly 34 to extend from the sleeve 33 until the first bolt 36 moves to the top of the first slide rail 311. During this process, the punch 6 leaves the spoke 100. The upper die 1 continues to move upward, driving the sleeve 33 to move upward, causing the release assembly 35 to move upward, driving the second spherical connector 32 to move upward, causing the first crank 37 to swing forward. This, through the first rotating shaft 39, drives the second crank 310 to swing forward, causing the ratchet mechanism 7 to drive the turntable 4 to rotate one notch, with each notch rotating at the same angle. The cooperation between the first bolt 36 and the first slide rail 311 acts as a buffer, ensuring the orderly switching of the air punch and the turntable 4 and avoiding conflict. In this embodiment, both the first spherical connector 31 and the second spherical connector 32 have fine threads and are self-locking, reducing the need for fixing nuts. The overall length of the connecting rod part of the crank connecting rod mechanism 3 can be adjusted by adjusting the first spherical connector 31 and the second spherical connector 32, so that the length just matches the stroke of the stamping machine.

[0049] The slide rod assembly 34 includes a first rod 341, a first slider 342, a protruding rod 343, a first spring 344, and a second rod 345. The first rod 341 is slidably connected to the sleeve 33. A sliding cavity 346 is formed inside the first rod 341, and the first slider 342 is slidably connected inside the sliding cavity 346. A second slide rail 347 is formed on both the front and rear side walls of the first rod 341. Two protruding rods 343 are fixed to the side wall of the first slider 342, and the protruding rods 343 pass through the second slide rails 347. The second rod 345 is fixed to the top of the first slider 342. The bottom end of the first spring 344 abuts against the top of the first slider 342, and the top end of the first spring 344 abuts against the top wall of the sliding cavity 346. The top end of the second rod 345 passes through the first rod 341 and is screwed to the first fisheye connector 31. The first spring 344 plays a role in buffering and shock absorption, so that the rotating spoke 100 accelerates smoothly and reduces the impact of the initial lifting force that could damage the device. In this embodiment, the first spring 344 has a stroke of 50mm. When the connecting rod of the crank-connecting rod mechanism 3 is 160mm long and mounted on a press with a 200mm slide stroke, it will not be damaged. Conversely, the second slide rail 347 also has a stroke tolerance greater than 40mm, serving as a foolproof mechanism. The first spring 344 adjusts the length of the connecting rod of the crank-connecting rod mechanism 3 when the connecting rod is slightly shorter, ensuring the safety of the operator and the mold.

[0050] In this embodiment, the sidewall of the first rod 341 is provided with two sets of threaded holes 348 spaced apart along its length. Each set of threaded holes 348 includes two threaded holes 348 arranged opposite each other. Each threaded hole 348 communicates with the slide cavity 346. The first bolt 36 is screwed into the threaded hole 348 and extends into the slide cavity 346. In the initial state, the bottom end of the first slider 342 abuts against the first bolt 36. The arrangement of the upper and lower sets of threaded holes 348 corresponds to the 160mm and 200mm stroke of the press slider, respectively. The length of the second rod 345 is not adjusted during mold installation, only selected. It has a foolproof function in case of incorrect installation. The design of the corresponding threaded holes 348 can reduce the need for thinking and improve safety.

[0051] The tripping assembly 35 includes a sleeve 351, a connecting seat 352, a second spring 353, a first abutment 354, a locking block 355, and a guide pin 356. An annular groove 357 is formed on the inner wall of the lower part of the sleeve 33. The top of the second fisheye connector 32 is screwed to the bottom of the sleeve 351. A portion of the connecting seat 352 is screwed into the interior of the sleeve 351. The connecting seat 352 has a first receiving groove 358 for accommodating the first abutment 354. The first abutment 354 can slide up and down along the first receiving groove 358. The upper part of the first abutment 354 has a first inclined surface 359. The bottom end of the second spring 353... The second spring 353 rests against the bottom wall inside the sleeve 351, and the top of the second spring 353 rests against the bottom wall of the first abutment block 354. The side wall of the connecting seat 352 has a first sliding hole 3510, which communicates with the first receiving groove 358. The locking block 355 is slidably connected to the first sliding hole 3510. The inner side wall of the locking block 355 has a second inclined surface 3511 that cooperates with the first inclined surface 359. The locking block 355 engages with the annular locking groove 357. The top of the connecting seat 352 has a sliding groove 3512 that communicates with the first sliding hole 3510. The guide pin 356 is fixed to the locking block 355 and slides with the sliding groove 3512. The second fisheye connector 32 and the sleeve 33 are connected by a release assembly 35, which can disengage when the turntable 4 cannot rotate for some reason or the press exceeds its stroke, preventing damage caused by rigid connection and improving safety. The tripping principle is as follows: When the turntable 4 cannot rotate or the press exceeds its stroke, the locking block 355 retracts into the first sliding hole 3510 under the force of the annular groove 357. The cooperation of the guide pin 356 and the sliding groove 3512 improves the smoothness of the extension and retraction process of the locking block 355. Through the cooperation of the first inclined surface 359 and the second inclined surface 3511, when the locking block 355 retracts, it pushes the first abutment block 354 downward. At this time, the second spring 353 contracts. When the locking block 355 is fully retracted into the first sliding hole 3510, the connecting seat 352 disengages from the sleeve 33, thus achieving automatic disengagement. After the connection disengages from the sleeve 33, the second spring 353 extends and resets, driving the first abutment block 354 upward and pushing the locking block 355 out of the first sliding hole 3510 to reset. Through the cooperation of the guide pin 356 and the sliding groove 3512, the locking block 355 is also limited, preventing it from falling out of the first sliding hole 3510.

[0052] The ratchet mechanism 7 includes a second rotating shaft 71, a bearing body 72, a connecting plate 73, a base plate 74, a ratchet disc 75, a pushing group 76, and a stopping group 77. The second rotating shaft 71 is rotatably connected to the lower mold 2. The turntable 4 is fixed to the top of the ratchet disc 75. The ratchet disc 75 is fixed to the middle of the first rotating shaft 39. The side wall of the ratchet disc 75 is provided with eight grooves 78 spaced equidistantly along the circumference. The lower part of the second rotating shaft is fixed with the bearing body 72. The bottom of the outer ring of the bearing body 72 is fixed with the connecting plate 73. The base plate 74 is fixed to the connecting plate 73. The left end of the base plate 74 is movably connected to the second crank 310. The top of the base plate 74 is provided with the pushing group 76. The top of the lower mold 2 is fixed with the stopping group 77. The stopping end of the stopping group 77 and the pushing end of the pushing group 76 extend into different grooves 78 respectively. When the second crank 310 swings backward, the push base plate 74 rotates to the left, causing the push end of the push assembly 76 to retract away from the current groove 78 until it extends into the groove 78 on its left. When the second crank 310 swings forward to reset, the push base plate 74 rotates to the right to reset, causing the push end of the push assembly 76 to push the ratchet disk 75 to rotate to the right, thereby causing the turntable 4 and its spokes 100 to rotate to the right. During the rotation of the ratchet disk 75 to the right, the stop end of the stop assembly 77 retracts away from the current groove 78. When the second crank 310 swings forward to reset, the push base plate 74 rotates to the right to reset, causing the ratchet disk 75 to rotate one notch to the right, completing one operation. The stop end of the stop assembly 77 extends into the groove 78 corresponding to it to stop and position the ratchet disk 75.

[0053] The groove 78 comprises an arc-shaped segment 781, a first flat segment 782, and a second flat segment 783. The arc-shaped segment 781 is located to the left of the first flat segment 782, and the second flat segment 783 is located to the right of the first flat segment 782, perpendicular to it. The second flat segment 783 is a smooth surface, and the tangent angle of the arc-shaped segment 781 is 125°. The groove 78 serves as the actuating groove for the push assembly 76 and also as the positioning groove for the stop assembly 77, sharing both functions. Because the second flat segment 783 is a smooth surface and the arc-shaped segment 781 has a large tangent angle, the force of the third spring 765 of the pawl 764 can be reliably applied to the ratchet disc 75, ensuring stable positioning and meeting the 3mm error requirement for the air hole spacing. The fact that the groove 78 and the pawl 764 are not completely fitted together does not affect the actuation.

[0054] The pushing assembly 76 includes a first upright plate 761, a pin 762, a first mounting block 763, a pawl 764, a third spring 765, a second bolt 766, a limit pin 767, a fourth spring 768, a second slider 769, a second stop block 7610, a stop block 7611, and a stop post 7612. The first mounting block 763 is rotatably connected to the base plate 74 via the pin 762. The first upright plate 761 is fixed to the front sidewall of the first mounting block 763. A second sliding hole 76 is provided inside the first mounting block 763. 13 and the third sliding hole 7614, the second sliding hole 7613 is located to the right of the third sliding hole 7614, the inside of the second sliding hole 7613 is slidably connected to a pawl 764, the inside of the pawl 764 is provided with a second receiving groove 7615, the front part of the second bolt 766 is located on the front side of the first upright plate 761, the rear part of the second bolt 766 passes through the first upright plate 761 and extends into the second receiving groove 7615 to be screwed to the pawl 764, the rear end of the third spring 765 abuts against the rear side wall of the second receiving groove 7615. The front end of the third spring 765 abuts against the rear side wall of the first upright plate 761. A stop block 7611 is screwed into the rear side of the interior of the third sliding hole 7614. The second slider 769 is slidably connected to the third sliding hole 7614, and the front end extends out of the third sliding hole 7614 to fix a second abutment 7610. The second abutment 7610 has a horizontal part 76101 and an arc-shaped part 76102. The horizontal part 76101 has arc-shaped parts 76102 on both the left and right sides. The base plate 74 on the front side of the second abutment 7610 and the first mounting plate 7610 are connected to the first mounting plate 7610. Each base plate 74 on the rear side of block 763 is fixed with a stop post 7612. The stop post 7612 on the rear side abuts against the rear side wall of the first mounting block 763, and the second abutment block 7610 abuts against the stop post 7612 on the front side. The second slider 769 has a fourth sliding hole 7616. The limiting pin 767 is fixed to the first mounting block 763 and passes through the fourth sliding hole 7616. The front end of the fourth spring 768 abuts against the rear side wall of the second slider 769, and the rear end of the fourth spring 768 abuts against the front side wall of the stop block 7611. When the base plate 74 rotates to the left, it drives the first mounting block 763 and its structure to rotate to the left, causing the pawl 764 to retract and leave the current groove 78. The third spring 765 retracts until the pawl 764 moves to the left to the groove 78 on the left side. The third spring 765 extends, causing the pawl 764 to extend and return to its original position within the groove 78. When the substrate 74 rotates to the right, it drives the first mounting block 763 and its structure to rotate to the right, and the pawl 764 pushes the ratchet disk 75 to the right, causing it to rotate one notch to the right.

[0055] Furthermore, the push assembly 76 has a safety pawl function. When the turntable 4 cannot rotate for some reason (e.g., the punching hole is not broken), the pawl 764 automatically springs out due to overload, preventing accidents and increasing the safety of equipment and personnel. Specifically, because the turntable 4 cannot rotate, the ratchet disk 75 cannot rotate. As the base plate 74 rotates to the right, it cannot drive the pawl 764 to push the ratchet disk 75 to rotate. As the base plate 74 continues to be subjected to the force of the second crank 310 to rotate to the right, the force of the ratchet disk 75 on the pawl 764 causes the first mounting block 763 to swing to the right around the pin 762, the abutment block leaves the stop block 7611, and the pawl 764 springs out from the groove 78. When the pawl 764 needs to be reset, the first mounting block 763 is pushed to the left until the rear side wall of the first mounting block 763 abuts against the stop post 7612 located on the rear side to reset. At this time, the second abutment block 7610 abuts against the stop post 7612 located on the front side. The second stop block 7610, under the action of the fourth spring 768, abuts against the front stop post 7612, and the first mounting block 763 is limited by the rear stop post 7612 to ensure that the pawl 764 will not deviate under normal operating conditions. Because the push group 76 has a safety spring pawl function, the mold-setting time is reduced: without automatic punching, mold-setting time is 5-10 minutes; with automatic punching, mold-setting requires training and takes 20-30 minutes. The mold-setting process is: remove the upper end of the connecting rod - test punch (generally, it cannot break in one punch; the stroke must be gradually increased to break) - install the connecting rod - adjust the connecting rod length - final punch. This push group 76 setting allows for direct test punching (if it doesn't break, the pawl 764 will overload and jump out), the mold-setting time is close to that of traditional mold-setting, and training is reduced. It provides a mechanism guarantee for fully automated robot loading and unloading.

[0056] The stop assembly 77 includes a second mounting block 771, a second upright plate 772, a stop claw 773, a fifth spring 774, and a third bolt 775. The second mounting block 771 is fixed to the top wall of the lower mold 2, and the second upright plate 772 is fixed to the front side wall of the second mounting block 771. A fifth sliding hole 776 is provided inside the second mounting block 771, and the stop claw 773 is slidably connected inside the fifth sliding hole 776. A third receiving groove 777 is provided inside the stop claw 773. The front part of the third bolt 775 is located on the front side of the second upright plate 772, and the rear part of the third bolt 775 passes through the second upright plate 772 and extends to the third receiving groove 777 to be screwed to the stop claw 773. The rear end of the fifth spring 774 abuts against the rear side wall of the third receiving groove 777, and the front end of the fifth spring 774 abuts against the rear side wall of the second upright plate 772. The engagement of the stop pawl 773 with the groove 78 prevents the ratchet disc 75 from turning to the left. When the ratchet disc 75 turns to the right, the stop pawl 773 retracts and leaves the groove 78.

[0057] The lower mold 2 is fixed with a guide post 8, and the upper mold 1 is fixed with a guide sleeve 9 that mates with the guide post 8. The cooperation between the guide sleeve 9 and the guide post 8 improves the smoothness of the mold opening and closing process.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automated punching die for wheel spokes, characterized in that: Includes an upper die installed on the stamping machine and a lower die arranged opposite to the upper die; The top of the lower die is provided with a ratchet mechanism, and the ratchet mechanism is provided with a turntable for mounting and positioning the spokes. The top of the lower die is fixed with a punching protrusion for cooperating with the bottom surface of the arc-shaped edge of the spokes. The turntable is inclined toward the punching protrusion. A punch is fixed to the bottom of the upper mold, and the punch is arranged opposite to the punching protrusion. The upper mold is connected to a crank-connecting rod mechanism, one end of which is connected to the ratchet mechanism, so that the ratchet mechanism is pushed to drive the turntable to rotate intermittently during the mold opening and closing process, thereby changing the processing position of the spoke arc edge; The crank-connecting rod mechanism includes a first fisheye joint, a second fisheye joint, a sleeve, a slide rod assembly, a release assembly, a first bolt, a first crank, a bearing seat, a first shaft, and a second crank; The top of the slide rod assembly is connected to a first fisheye connector, which is movably connected to the upper mold. The slide rod assembly is inserted into the sleeve and can slide relative to the sleeve; The sleeve has at least one first slide rail on its side wall, and the slide rod assembly has at least one first bolt that passes through the first slide rail. One part of the tripping assembly is engaged inside the sleeve, and the other part of the tripping assembly is connected to a second fisheye connector; One end of the first crank is movably connected to the second fisheye connector; The bearing housing is fixed to the top of the lower mold, the first rotating shaft passes through the bearing housing, one end of which is fixedly connected to the other end of the first crank, and the other end is fixedly connected to the second crank. The slider assembly includes a first rod, a first slider, a protruding rod, a first spring, and a second rod; The first rod is slidably connected to the sleeve. A sliding cavity is provided inside the first rod. A first slider is slidably connected inside the sliding cavity. At least one second slide is provided on the side wall of the first rod. At least one protruding rod is fixed on the side wall of the first slider. The protruding rod passes through the second slide. A second rod is fixed to the top of the first slider, the bottom end of the first spring abuts against the top of the first slider, and the top end of the first spring abuts against the top wall of the sliding cavity; The top of the second rod passes through the first rod and is screwed into the first fisheye connector.

2. The automated spoke punching mold according to claim 1, characterized in that: The sidewall of the first rod is provided with at least two sets of threaded holes spaced apart along the length direction. Each threaded hole communicates with the sliding cavity. The first bolt is screwed into the threaded hole and extends into the sliding cavity. In the initial state, the bottom end of the first slider abuts against the first bolt.

3. The automated spoke punching mold according to claim 1, characterized in that: The tripping assembly includes a sleeve, a connecting seat, a second spring, a first abutment, a locking block, and a guide pin; An annular groove is provided on the inner wall of the lower part of the sleeve; The top of the second fisheye connector is screwed to the bottom of the sleeve; A portion of the connecting seat is screwed into the interior of the sleeve; The connecting seat has a first receiving groove for accommodating the first abutment, the first abutment can slide up and down along the first receiving groove, and the upper part of the first abutment has a first inclined surface; The bottom end of the second spring abuts against the bottom wall inside the sleeve, and the top end of the second spring abuts against the bottom wall of the first abutment. The side wall of the connecting seat is provided with a first sliding hole, which communicates with the first receiving groove. The locking block is slidably connected to the first sliding hole. The inner side wall of the locking block has a second inclined surface that cooperates with the first inclined surface. The locking block engages with the annular locking groove. The top of the connector is provided with a groove that communicates with the first sliding hole. The guide pin is fixed to the locking block and slides in cooperation with the groove.

4. The automated spoke punching mold according to claim 1, characterized in that: The ratchet mechanism includes a second rotating shaft, a bearing body, a connecting plate, a base plate, a ratchet disc, a pushing group, and a stopping group; The second rotating shaft is rotatably connected to the lower mold, the turntable is fixed to the top of the ratchet disk, the ratchet disk is fixed to the middle of the first rotating shaft, the side wall of the ratchet disk is provided with multiple grooves, the lower part of the second rotating shaft is fixed with a bearing body, the bottom of the outer ring of the bearing body is fixed with a connecting plate, the base plate is fixed to the connecting plate, one end of the base plate is movably connected to the second crank, and the top of the base plate is provided with a push assembly; The top of the lower mold is fixed with a stop assembly, and the stop end of the stop assembly and the push end of the push assembly extend into different grooves respectively.

5. The automated air-punching mold for wheel spokes according to claim 4, characterized in that: The groove has an arcuate section, a first planar section, and a second planar section; The arc-shaped segment is disposed on one side of the first planar segment, and the second planar segment is disposed on the other side of the first planar segment, and is perpendicular to the first planar segment. The tangent angle of the arc segment is 120°-130°.

6. The automated spoke punching mold according to claim 4, characterized in that: The pushing assembly includes a first vertical plate, a pin, a first mounting block, a pawl, a third spring, a second bolt, a limit pin, a fourth spring, a second slider, a second abutment, a stop block, and a stop post; The first mounting block is rotatably connected to the base plate via a pin, and the first upright plate is fixed to the front side wall of the first mounting block; The first mounting block has a second sliding hole and a third sliding hole inside; The second sliding hole is slidably connected to a pawl, and the pawl is provided with a second receiving groove. A part of the second bolt is located on the front side of the first upright plate, and the other part of the second bolt passes through the first upright plate and extends into the second receiving groove to be screwed to the pawl. The rear end of the third spring abuts against the rear side wall of the second receiving groove, and the front end of the third spring abuts against the rear side wall of the first upright plate. A stop block is screwed into the rear side of the interior of the third sliding hole. The second slider is slidably connected to the third sliding hole, and a second abutment is fixed to the front end of the third sliding hole. The second abutment has a horizontal part and an arc-shaped part. Arc-shaped parts are present on both the left and right sides of the horizontal part. A stop post is fixed on the base plate on the front side of the second abutment and on the base plate on the rear side of the first mounting block. The stop post on the rear side abuts against the rear side wall of the first mounting block, and the second abutment abuts against the stop post on the front side. The second slider has a fourth sliding hole. The limiting pin is fixed to the first mounting block and passes through the fourth sliding hole. The front end of the fourth spring abuts against the rear side wall of the second slider, and the rear end of the fourth spring abuts against the front side wall of the stop block.

7. The automated spoke punching mold according to claim 4, characterized in that: The stop assembly includes a second mounting block, a second upright plate, a stop claw, a fifth spring, and a third bolt; The second mounting block is fixed to the top wall of the lower mold, and the second vertical plate is fixed to the front side wall of the second mounting block; The second mounting block has a fifth sliding hole inside, and a stop pawl is slidably connected in the fifth sliding hole. The stop pawl has a third receiving groove inside. A part of the third bolt is located on the front side of the second upright plate, and the other part of the third bolt passes through the second upright plate and extends to the third receiving groove to be screwed to the stop pawl. The rear end of the fifth spring abuts against the rear side wall of the third receiving groove, and the front end of the fifth spring abuts against the rear side wall of the second upright plate.

8. The automated spoke punching mold according to claim 5, characterized in that: The lower mold is fixed with a guide post, and the upper mold is fixed with a guide sleeve that mates with the guide post; The top of the turntable has multiple positioning posts for positioning the spokes; Both the punching protrusion and the lower die have through holes, and the through holes of the punching protrusion are connected to the through holes of the lower die. The second planar segment is a smooth surface.

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