A feeding device for bicycle sprocket finishing

Abstract

The application discloses a feeding device for bicycle tooth disc finishing, and belongs to the technical field of bicycle accessories, which comprises a rack module and a feeding module, wherein the feeding module comprises a pressing assembly and a lifting assembly; the pressing assembly presses the tooth disc from the top through an elastically-sliding rod pin seat and a pressing rod; the lifting assembly drives the bottom elastic sliding sheet to stretch and shrink through a shaft cylinder and a pressure rod, and is used for separating and lifting the tooth disc; the linkage of the pressing rod and the lifting assembly realizes automatic correction and stable feeding of the tooth disc; the pressing rod corrects the skewed tooth disc, and the sliding sheet is inserted between the tooth discs, thereby effectively separating the adhered workpieces, preventing the workpieces from being lifted during carrying, smoothly separating the tooth disc from the material rod, guaranteeing the subsequent alignment accuracy, realizing continuous feeding, and improving batch processing efficiency.

Description

Technical Field

[0001] This invention belongs to the field of bicycle parts technology, specifically relating to a feeding device for precision machining of bicycle cranksets. Background Technology

[0002] Precision machining of bicycle chainrings refers to the final processes of grinding and milling the chainring, the core component of the transmission, to ensure the geometric accuracy of the teeth, the surface finish, and the smooth meshing with the chain, thereby improving pedaling rigidity, shifting response, and wear life.

[0003] Traditional machining of toothed discs often relies on manual labor or simple mechanical grippers for feeding. Stacked toothed discs are prone to tilting and jamming during the material handling process, which can cause friction or even jamming between the disc holes and the material bar. Uneven force during material handling can further tilt the discs, increasing sliding resistance and the risk of jamming. In addition, the discs are sprayed with coolant during rough machining, and oil or static electricity often causes adhesion between adjacent stacked discs, making separation difficult. Forcibly removing the material can easily scratch the disc surface or deform the stacking rod. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a feeding device for precision machining of bicycle cranksets, so as to solve the problems in the background technology mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A feeding device for precision machining of bicycle chainrings includes a frame module and a feeding module; The frame module includes a machine base assembly and a drive assembly. The machine base assembly includes a table, a milling area, and a material tray. The table is provided with a milling area and a material tray. The material tray is rotatably mounted on the table, and a number of stacking assemblies are arranged on the material tray. The stacking assemblies are used to stack and assemble the toothed discs to be processed. The feeding module includes a pressing component and a lifting component. The pressing component is assembled on one side of the drive component. The pressing component includes a shaft pin seat, a slide rod, a rod pin seat and a pressure rod. The slide rod is fixedly arranged at the bottom of the shaft pin seat. One end of the rod pin seat is elastically slidably assembled on the slide rod. The other end of the rod pin seat is fixedly connected to the pressure rod. The pressure rod is used to press the stacked toothed discs from the top. The feeding module includes a lifting assembly, which is arranged on one side of the shaft pin seat. The lifting assembly includes a shaft cylinder, a pressure rod, and sliding vanes. The shaft cylinder is arranged on one side of the center of the gear plate. Several sliding vanes are elastically inserted into the bottom of the shaft cylinder. The pressure rod is linked to the rod pin seat and is used to drive the movement of several sliding vanes.

[0006] As a further embodiment of the present invention, the machine tool assembly also includes a positioning frame, a reset rod, and a contact switch. The positioning frame is arranged on a fixed axis in the milling area, and a reset rod is also provided on one side of the positioning frame. The contact switch is arranged on the table surface and is located near the material tray.

[0007] As a further embodiment of the present invention, the drive assembly includes a main guide rail, a main platform, a telescopic guide rail, and a telescopic platform. The main guide rail is fixedly arranged on the platform, the main platform is slidably mounted on the main guide rail, the telescopic guide rail is fixedly arranged on the main platform, and the telescopic platform is slidably mounted on the telescopic guide rail. The drive assembly also includes a vertical plate, a lifting guide rail, a lifting platform, and a shaft bracket. The vertical plate is fixedly installed on the telescopic platform, the lifting guide rail is arranged at one end of the vertical plate, and the lifting platform is slidably mounted on the lifting guide rail. The shaft bracket is fixedly installed on one side of the lifting platform, and a guide shaft is also fixedly mounted on the shaft bracket.

[0008] As a further embodiment of the present invention, the pressing assembly further includes a main support, a side support, and a connecting plate. One end of the main support is slidably mounted on the guide shaft, and the other end of the main support is fixedly connected to the side support and the connecting plate. The bottom of the axle pin seat is also provided with an axle pin, and the top of the rod pin seat is also provided with a rod pin. The axle pin and the rod pin are aligned.

[0009] As a further embodiment of the present invention, the lifting assembly further includes a material rack, an elastic element, a cone block and a guide groove. One end of the material rack is fixedly installed on the connecting plate, and the other end of the material rack is fixedly connected to a shaft cylinder. The pressure rod is slidably inserted into the shaft cylinder, and an elastic element is also sleeved on the pressure rod. A cone block is fixedly installed at the bottom of the pressure rod. Several guide grooves are arranged at the bottom of the shaft cylinder, and several sliding pieces are elastically inserted into the guide grooves in the radial direction. One end of the sliding piece is also provided with an inclined surface, which movably abuts against the cone block.

[0010] As a further embodiment of the present invention, the lifting assembly also includes alignment pins, with three sets of alignment pins arranged in an array along the circumferential direction at the outer diameter end of the shaft cylinder.

[0011] As a further embodiment of the present invention, the stacking assembly includes a material rack, stacking rods, a toothed disc to be processed, a toothed disc hole, and a central through hole. The material rack has three sets of stacking rods arranged along the circumferential direction, and the toothed disc to be processed has six sets of toothed disc holes arranged circumferentially. Several toothed discs to be processed are stacked and inserted on the stacking rods.

[0012] As a further embodiment of the present invention, the pressing assembly further includes a flipping plate, a top support arc plate and a sliding groove. The flipping plate is rotatably mounted on the material rack. Top support arc plates are respectively provided at both ends of the flipping plate. A sliding groove is also provided at one end of the flipping plate. The sliding groove is sleeved on the pressure rod. The pressing assembly also includes a locking rod, a driven shaft, a groove, a locking block, a limiting block, and a resetting component. The locking rod is fixedly arranged at one end of the top support arc plate. The driven shaft is rotatably mounted on the material rack, and the groove and locking block are coaxially fixedly installed on the driven shaft. The limiting block is fixedly installed on the material rack and movably abuts against the locking block. A resetting component is also coaxially arranged in the middle of the driven shaft.

[0013] In summary, the embodiments of the present invention have the following beneficial effects compared with the prior art: This invention improves the stability of the feeding of the toothed disc by linking the pressure bar and the lifting assembly. During the pressing process, the pressure bar automatically corrects the tilted and jammed toothed disc and restores it to a horizontal state, avoiding material picking jamming caused by the tilt of the stacked material. The sliding plate extending radially from the bottom of the shaft cylinder is precisely inserted between the first and second layer toothed discs, which can effectively separate the sticky workpieces and prevent the problem of interlayer lifting caused by the adsorption force during the handling process, greatly reducing the risk of processing interruption. Furthermore, a center-force lifting method is adopted to replace the traditional single-sided clamping, ensuring balanced force during lifting and avoiding slippage and jamming between the hole and the stacking rod caused by the tilting of the toothed disc. Combined with the alignment pin at the outer diameter end of the shaft cylinder and the remaining toothed disc hole, circumferential positioning is assisted, allowing the toothed disc to smoothly detach from the stacking rod, reducing jamming failures and increasing the success rate of single material retrieval, and ensuring the alignment accuracy when moving to the positioning frame later. Furthermore, this solution achieves the linkage of pressing, dispensing, picking up and unlocking. After the pressing rod is in place, it triggers the locking mechanism to keep the slide plate in the extended state, ensuring the stability of the workpiece during transportation. When it is moved to the unloading station, the reset rod automatically releases the lock to complete the unloading, realizing continuous material supply and improving batch processing efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of a machine tool assembly in one embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the machine tool assembly from another perspective in one embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the structure of the driving component in one embodiment of the present invention.

[0018] Figure 5 This is a top view of one embodiment of the present invention.

[0019] Figure 6 This is a schematic diagram of the structure of the pressing assembly and the stacking assembly in one embodiment of the present invention.

[0020] Figure 7 This is a partial structural diagram of the pressing assembly in one embodiment of the present invention.

[0021] Figure 8 for Figure 7 Enlarged schematic diagram of reference numeral A in the attached figure.

[0022] Figure 9 This is a schematic diagram of the contact-type push rod in one embodiment of the present invention.

[0023] Figure 10 for Figure 9 Enlarged schematic diagram of reference numeral B in the attached figure.

[0024] Figure label: Machine assembly, 101-Machine base, 102-Table surface, 103-Milling area, 104-Plate, 105-Socket, 106-Positioning frame, 107-Reset rod, 108-Contact switch; Drive assembly, 201-main guide rail, 202-main platform, 203-telescopic guide rail, 204-telescopic platform, 205-vertical plate, 206-lifting guide rail, 207-lifting platform, 208-shaft bracket, 209-guide shaft; Material pressing assembly, 301-main bracket, 302-side bracket, 303-connecting plate, 304-shaft pin seat, 305-shaft pin, 306-slide rod, 307-rod pin seat, 308-rod pin, 309-pressure rod, 310-top support rod, 311-top support head, 312-flipping plate, 313-top support arc plate, 314-slide groove, 315-locking rod, 316-driven shaft, 317-groove part, 318-block, 319-limiting block, 320-reset part, 321-contact type top rod; Material lifting assembly, 401-material rack, 402-shaft cylinder, 403-pressure rod, 404-stop, 405-elastic element, 406-cone block, 407-guide groove, 408-sliding plate, 409-inclined surface, 410-aligning pin; Stacking assembly, 501-material rack tray, 502-stacking rod, 503-tooth disc to be processed, 504-tooth disc hole, 505-central through hole. Detailed Implementation

[0025] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Please see Figures 1-10According to one embodiment of the present invention, a feeding device for precision machining of bicycle cranksets has a first direction x, a second direction y, and a third direction z. The feeding device includes a frame module and a feeding module. The frame module includes a machine base assembly 1 and a drive assembly 2. The machine base assembly 1 includes a table 102, a milling area 103, and a material tray 104. The milling area 103 and the material tray 104 are respectively provided on the table 102. The material tray 104 is rotatably mounted on the table 102, and a plurality of stacking assemblies are arranged on the material tray 104. The stacking assemblies are used to stack and assemble the cranksets to be processed. The feeding module includes a pressing assembly 3 and a lifting assembly 4. The pressing assembly 3 is assembled on one side of the drive assembly 2. The pressing assembly 3 includes a shaft pin seat 304, a slide rod 306, a rod pin seat 307, and a pressing rod 309. The slide rod 306 is fixedly arranged at the bottom of the shaft pin seat 304, and one end of the rod pin seat 307 is spring-loaded. A sliding assembly is mounted on the slide rod 306, and a pressure rod 309 is fixedly connected to the other end of the rod pin seat 307. The pressure rod 309 is used to press down on the stacked toothed discs from the top. The feeding module includes a lifting assembly 4, which is arranged on one side of the shaft pin seat 304. The lifting assembly 4 includes a shaft cylinder 402, a pressure rod 403, and sliding plates 408. The shaft cylinder 402 is arranged on one side of the center of the toothed disc, and several sliding plates 408 are elastically inserted into the bottom of the shaft cylinder 402. The lever 403 is linked to the lever pin seat 307 and is used to drive the movement of several sliding plates 408. The stacking assembly 5 includes a material rack 501, stacking rods 502, a toothed disc to be processed 503, a toothed disc hole 504 and a central through hole 505. The material rack 501 is provided with three sets of stacking rods 502 along the circumferential direction. The toothed disc to be processed 503 is provided with six sets of toothed disc holes 504 in the circumferential direction, and several toothed discs to be processed 503 are stacked and inserted on the stacking rods 502.

[0027] In practical application, when this device is used to perform automatic feeding operations in the finishing process of bicycle chainrings, the overall support structure of the device consists of a frame module fixedly installed in the working environment and a feeding module movably configured on the frame module. The table 102 is divided into a milling area 103 and a material tray 104. A positioning frame 106 is arranged on one side of the milling area 103. This positioning frame 106 provides radial and axial constraints to the chainring after it arrives at the milling station, so that the chainring is properly positioned during subsequent milling processes. The device can be reliably clamped and positioned. Multiple stacking components 5 are arranged on the material tray 104. Each stacking component 5 is used to stack the raw material of the toothed disc to be processed in a stacked manner. The feeding module of the device has two oppositely arranged stations in the working cycle: a picking station for taking out the raw material of the toothed disc and a feeding station for placing the toothed disc blank. The milling area 103 is arranged on the feeding station side, while the material tray 104 is arranged on the picking station side, thereby realizing the separation of the feeding stroke and the unloading stroke to improve the working cycle efficiency. Furthermore, a socket 105 is fixedly installed on the material tray 104. The socket 105 is used to detachably connect the positioning material rack tray 501. Three sets of stacking rods 502 are arranged at equal angles along the circumference of the material rack tray 501. Each set of stacking rods 502 extends vertically and is used to pass through multiple stacked toothed discs 503 to be processed. A toothed disc hole 504 is opened at the center of the toothed disc 503 to be processed. The toothed disc hole 504 forms a sliding fit clearance with the outer diameter of the stacking rod 502, so that the toothed disc can slide up and down along the axial direction of the stacking rod 502. When the material rack tray 501, which is full of toothed discs to be processed, rotates with the material tray 104 to the material picking station side and is positioned, the loading module, driven by the drive component 2, first moves linearly along the horizontally set x-axis direction. The feeding module is moved to the area directly above the stacking assembly 5. Then, the feeding module is further fed by the drive assembly 2 with lateral feed along the y-axis and vertical feed along the z-axis, so that the feeding module can move precisely to the top center position of the stacking assembly 5. After the feeding module reaches the top of the stacking assembly 5, the drive assembly 2 continues to drive the feeding module to approach along the negative z-axis, that is, vertically downward. During this downward movement, the axis of the lifting assembly 4 and the axis of the central through hole 505 of the stacking rod 502 are collinearly aligned, and the feeding module continues to move along the negative z-axis until the rod pin seat 307 and the pressure rod 309 fixed at the bottom of the shaft pin seat 304 first contact the upper surface of the top stacked tooth plate.

[0028] During this contact process, the pressure rod 309 applies a uniform pressing force to the upper surface of the toothed disc under the combined action of its own weight and the spring preload. This pressing force can effectively squeeze the toothed disc, which is slightly tilted or jammed due to uneven stacking or transportation vibration, to a horizontal position, avoiding jamming caused by the tilt of the toothed disc during subsequent material handling. When the pressure rod 309 continues to descend until the toothed disc can no longer displace in the negative z-axis direction, that is, when the lower surface of the toothed disc forms a rigid contact limit with the support surface of the stacking assembly 5 or the upper surface of the lower toothed disc, the pressure rod 309 is allowed to descend freely due to the reaction force applied by the toothed disc in the positive z-axis direction. The degree is restricted. In this state, the shaft pin seat 304 continues to move along the negative z-axis under the drive of the drive assembly 2, while the rod pin seat 307 remains stationary due to the limiting effect of the pressure rod 309. This causes the axial distance between the shaft pin seat 304 and the rod pin seat 307 to continuously shorten. The elastic buffer between the two is gradually compressed. When the axial distance is shortened to the preset size, the shaft cylinder 402 in the lifting assembly 4 slides axially relative to the shaft pin seat 304 and moves axially to the side of the plane where the bottom surface of the central through hole 505 is located. At this time, the lower end surface of the shaft cylinder 402 and the lower surface of the bottom layer, i.e. the first layer of the toothed plate, remain coplanar in the vertical direction. As the pressure rod 403 continues to be driven downward inside the shaft cylinder 402, multiple sliding pieces 408, elastically slidably inserted into the radial slot of the shaft cylinder 402, extend outward synchronously along the radial direction of the shaft cylinder 402 under the push of the conical mating structure. The front end of each sliding piece 408 is wedge-shaped, and the height of the wedge tip in the z-axis direction is less than the bottom height of the first layer of the toothed plate. It is accurately inserted into the interlayer gap between the first and second layers of the toothed plate. This insertion action provides bottom support force to the first layer of the toothed plate in the positive z-axis direction, and simultaneously, through the wedging action of the sliding pieces 408, forcibly separates the second layer of the toothed plate from the first layer, thereby effectively preventing... During the subsequent upward transport process, adhesion may occur between adjacent toothed plates due to residual cutting fluid or electrostatic adsorption effect on the surface of the toothed plate. Since the force application point of the slider 408 on the toothed plate is located in the circumferential direction of the center hole area of ​​the toothed plate, the resultant force direction of the toothed plate during the lifting process coincides with its central axis. Therefore, when lifting along the positive z-axis, the toothed plate can be lifted in a stable posture and detached from the stacking rod 502. Compared with the traditional single-sided clamping or eccentric lifting method, this structure can avoid the toothed plate tilting during the lifting process due to uneven clamping force, thereby preventing sliding jamming between the toothed plate hole 504 and the outer wall of the stacking rod 502, and ultimately ensuring the smooth removal of the toothed plate.

[0029] Please see Figure 2In a preferred embodiment of the present invention, the machine tool assembly 1 further includes a positioning frame 106, a reset rod 107 and a contact switch 108. The positioning frame 106 is arranged on a fixed axis in the milling area 103, and a reset rod 107 is also provided on one side of the positioning frame 106. The contact switch 108 is arranged on the table surface 102 and is located near the material tray 104.

[0030] In practical application, the internal area of ​​the milling zone 103 is used to fix and install the main body of the milling machine. The main body of the milling machine is equipped with a rotary milling cutter and a feed mechanism for performing fine milling and backing machining on the tooth contour of the gear plate. The positioning frame 106 is arranged on one side of the milling zone 103, and its top is provided with a rotatable positioning shaft and a clamping mechanism. The positioning frame 106 is used to drive the gear plate mounted on it to rotate around its own axis after the gear plate is in place, so that the milling machine can sequentially perform backing cutting on each tooth groove distributed in the circumferential direction of the gear plate to ensure machining accuracy. The contact switch 108 is arranged on one side edge of the material picking station, and the contact switch 108 forms a linkage trigger mechanism in the material clamping assembly 3. When the loading module loads the material from the material rack 501... After the last toothed disc to be processed is removed, since the downward height of the pressure rod 309 in the z-axis direction has reached the maximum value within its stroke range, the contact rod 321 located on the bottom side of the shaft pin seat 304 moves down to make contact with the contact switch 108. After being triggered, the contact switch 108 generates an electrical signal, which is transmitted to the control system of the device. The control system sends a rotation command to the indexing plate driver to drive the material tray 104 to rotate around its rotation center by a set angle. As a result, during the rotation of the material tray 104, the material rack 501 that has completed the toothed disc removal operation is rotated out of the material picking station, and at the same time, another material rack 501 pre-loaded with a new toothed disc to be processed is rotated into the material picking station to realize continuous automatic feeding of toothed disc raw materials.

[0031] Please see Figure 4 In a preferred embodiment of the present invention, the driving assembly 2 includes a main guide rail 201, a main platform 202, a telescopic guide rail 203, and a telescopic platform 204. The main guide rail 201 is fixedly arranged on the platform 102. The main platform 202 is slidably mounted on the main guide rail 201. The telescopic guide rail 203 is fixedly arranged on the main platform 202. The telescopic platform 204 is slidably mounted on the telescopic guide rail 203. The driving assembly 2 also includes a vertical plate 205, a lifting guide rail 206, a lifting platform 207, and a shaft support 208. The vertical plate 205 is fixedly mounted on the telescopic platform 204. The lifting guide rail 206 is arranged at one end of the vertical plate 205, and the lifting platform 207 is slidably mounted on the lifting guide rail 206. The shaft support 208 is fixedly mounted on one side of the lifting platform 207, and a guide shaft 209 is also fixedly mounted on the shaft support 208.

[0032] In practical application, the main guide rail 201 is fixedly installed on the table surface 102 at the top of the machine platform 101 along the x-axis direction, i.e., the longitudinal direction of the machine platform 101. The main guide rail 201 is a linear rolling guide rail or a sliding guide rail structure, used to provide linear guiding constraint on the main platform 202 in the x-axis direction, so that the main platform 202 has a unidirectional linear motion degree of freedom in the x-axis direction. Similarly, the telescopic platform 204 is slidably assembled on the main platform 202 and is limited by the intermediate guide pair in the y-axis direction, i.e., the transverse direction of the machine platform 101, to reciprocate, thereby realizing the loading module on the horizontal plane. The lifting platform 207 is slidably mounted on the telescopic platform 204 and is limited to the z-axis direction (vertical direction) by the vertical guide pair. This allows the shaft support 208, which is finally mounted on one end of the lifting platform 207, to have three degrees of freedom of movement in the three directions of x-axis, y-axis and z-axis in the spatial rectangular coordinate system, which meets the material handling requirements of complex spatial trajectories. The main support 301 is elastically slidably mounted on the guide shaft 209 so that when the main support moves on the z-axis, the material loading module can elastically abut against the first layer of toothed disc at any position.

[0033] Please see Figure 6 and Figure 7 In a preferred embodiment of this embodiment, the pressing assembly 3 further includes a main support 301, a side support 302, and a connecting plate 303. One end of the main support 301 is slidably mounted on the guide shaft 209, and the other end of the main support 301 is fixedly connected to the side support 302 and the connecting plate 303. The bottom of the shaft pin seat 304 is also provided with a shaft pin 305, and the top of the rod pin seat 307 is also provided with a rod pin 308. The shaft pin 305 and the rod pin 308 are aligned.

[0034] In practical application, the side brackets 302 are fixedly installed on the lateral end face of the main bracket 301 by bolt connection or welding. The connecting plate 303 is fixedly installed between the two sets of oppositely arranged side brackets 302 to enhance the overall structural rigidity and serve as the mounting base for the lifting assembly 4. A shaft pin 305 is provided on the bottom side of the shaft pin seat 304 facing the rod pin seat 307, and a rod pin 308 is provided on the top side of the rod pin seat 307 facing the shaft pin seat 304. Since the rod pin seat 307 slides on the outer circumferential surface of the slide rod 306 through a guide hole, the slide rod 306 is fixedly connected between the shaft pin seat 304 and the rod pin seat 307. When the lower end face of the pressure rod 309 forms abutment contact with the upper surface of the stacked toothed discs, the pressure rod 309 is subjected to a reverse force applied by the toothed discs in the positive z-axis direction. This force restricts the feed motion of the pressure rod 309 in the negative z-axis direction, thereby causing the axial length of the spring between the shaft pin seat 304 and the rod pin seat 307 to continuously shorten, and the elastic potential energy inside the spring to gradually increase until the lower end face of the shaft pin 305 forms a movable abutment fit with the upper end face of the rod pin 308. The shaft pin seat 304 then moves down to the lower limit position of its stroke. At this time, the slider 408 of the lifting assembly 4 has been fully extended under the conical drive, thereby completing the locking and gripping action of the toothed discs.

[0035] Please see Figure 10 In a preferred embodiment of the present invention, the material lifting assembly 4 further includes a material rack 401, an elastic element 405, a cone block 406, and a guide groove 407. One end of the material rack 401 is fixedly installed on the connecting plate 303, and the other end of the material rack 401 is fixedly connected to a shaft cylinder 402. The pressure rod 403 is slidably inserted into the shaft cylinder 402, and the elastic element 405 is also sleeved on the pressure rod 403. The cone block 406 is fixedly installed at the bottom of the pressure rod 403. A plurality of guide grooves 407 are arranged at the bottom of the shaft cylinder 402, and a plurality of sliding pieces 408 are elastically slidably inserted into the guide grooves 407 along the radial direction. One end of the sliding piece 408 is also provided with an inclined surface 409, and the inclined surface 409 is movably abutting against the cone block 406.

[0036] In practical application, the material rack 401 is fixedly installed below the connecting plate 303 by bolt fastening, and the pressure rod 403 is slidably inserted inside the shaft cylinder 402 through the elastic reset element, i.e., the elastic element 405. A stop 404 is fixedly installed on the top of the pressure rod 403. The stop 404 is used to limit the maximum downward stroke of the pressure rod 403 relative to the shaft cylinder 402. When the lower end of the pressure rod 403 is subjected to an external force along the negative z-axis, the elastic element 405 is axially compressed and stores elastic deformation energy. At the same time, the cone block 406 fixed at the bottom of the pressure rod 403 applies a radial component force to one side of multiple inclined surfaces 409, causing several sliders 408 to slide outward along the radial direction of the shaft cylinder 402 under the action of the inclined surfaces, overcoming the radial constraint force of the elastic reset element. This allows the tip of the slider 408, which has an inclined cone shape, to be inserted into the interlayer gap between the first and second gear plates, thereby achieving the forced separation of the two adjacent gear plates. Meanwhile, the bottom plane of the slider 408 provides a support surface for the first gear plate along the positive z-axis, so that when the shaft cylinder 402 moves upward along the positive z-axis under the drive of the drive assembly 2, the first gear plate can move upward synchronously with the shaft cylinder 402. After the first layer of toothed discs completely slides off the stacking rod 502, the drive assembly 2 drives the toothed discs to move along the x-axis, y-axis and z-axis in combination to the unloading station on one side of the milling area 103, and precisely places the toothed discs on the positioning surface of the positioning frame 106 for use in the subsequent fine milling and backing machining process.

[0037] Furthermore, the lifting assembly 4 also includes alignment pins 410. Three sets of alignment pins 410 are arranged in a circumferential array at the outer diameter end of the shaft cylinder 402. The alignment pins 410 are arranged at the outer diameter end of the shaft cylinder 402, and during the gripping of the toothed disc, the alignment pins 410 and the stacking rod 502 are staggered in the circumferential direction. That is, the alignment pins 410 do not enter the space occupied by the stacking rod 502, but are inserted into the toothed disc holes 504 on the toothed disc 503 to be processed, except for the through hole of the stacking rod 502. This provides auxiliary positioning constraints for the toothed disc during the handling process, preventing the toothed disc from rotating around its central axis in the horizontal plane. When the toothed disc moves to the positioning frame 106, the alignment pins 410 can form a positioning alignment fit with the pre-set pin structure on the positioning frame 106, thereby realizing the precise and repeatable positioning of the toothed disc at the unloading station and ensuring consistent loading position.

[0038] Please see Figure 7 and Figure 8In a preferred embodiment of the present invention, the pressing assembly 3 further includes a tilting plate 312, a top support arc plate 313, and a sliding groove 314. The tilting plate 312 is rotatably mounted on the material rack 401. The top support arc plates 313 are respectively provided at both ends of the tilting plate 312, and a sliding groove 314 is provided at one end of the tilting plate 312. The sliding groove 314 is sleeved on the pressure rod 403. The pressing assembly 3 also includes a locking rod 315, a driven shaft 316, and a grooved component. 317, 318, 319, and 320 are provided. The locking rod 315 is fixedly arranged at one end of the top support arc plate 313. The driven shaft 316 is rotatably mounted on the material rack 401. The driven shaft 316 is coaxially fixedly mounted with the groove 317 and the locking block 318. The limiting block 319 is fixedly mounted on the material rack 401 and movably abuts against the locking block 318. The driven shaft 316 is also coaxially provided with a reset component 320 in the middle.

[0039] In practical application, the flipping plate 312 is pivotally mounted on the lateral extension arm of the material rack 401. When the pressure rod 309 is pushed upward along the positive z-axis by the upper surface of the toothed plate, the top support rod 310, which is laterally fixed to the pressure rod 309, is simultaneously pushed upward, so that the top support head 311 provided at the top of the top support rod 310 comes into contact with the lower surface of the top support arc plate 313 fixedly provided on the flipping plate 312. The top support arc plate 313 is driven to flip upward by the upward pushing force of the top support head 311. The rotating plate 312 rotates around its pivot. During the rotation of the rotating plate 312, the slide groove 314 on the rotating plate 312 is relatively displaced relative to the outer wall of the shaft cylinder 402. The slide groove 314 gradually moves toward the side of the shaft cylinder 402, so that the pressure rod 403 passing through the slide groove 314 overcomes the elastic force of the elastic element 405 and presses toward the bottom of the shaft cylinder 402 under the action of the slide groove 314, thereby pushing the cone block 406 to drive several slide pieces 408 to extend radially. When the flip plate 312 rotates, the locking rod 315 fixed at its end rotates synchronously with the flip plate 312. When the locking rod 315 slides over the top contour surface of the groove 317 during rotation, it will push the groove 317 to rotate around its driven shaft 316 at a certain angle. When the end of the locking rod 315 moves to the groove position at the top of the groove 317, the end of the locking rod 315 is locked into the groove under the action of elastic restoring force or gravity, thereby locking the rotation angle position of the flip plate 312. Thus, during the entire process of removing and transporting the toothed plate, several sliding pieces 408 always maintain a radially extended state, ensuring continuous and stable support for the toothed plate. When the feeding module carries the toothed disc to the unloading station on one side of the positioning frame 106 and performs the lowering and placement action, the reset rod 107 fixedly installed on the machine base 101 abuts against the reset member 320 set on the flip plate 312 near the positioning frame 106. This causes the side bracket 302 to drive the driven shaft 316 to rotate in the opposite direction, thereby causing the groove member 317 to rotate in the opposite direction by a predetermined angle. This allows the end of the locking rod 315 to disengage from the groove of the groove member 317, thus allowing the flip plate 312 to switch back to the unlocked state under the action of the elastic reset element. The slide plate 408 automatically retracts into the shaft cylinder 402 under the action of the radial elastic element, thereby realizing the automatic release and unlocking of the toothed disc at the unloading station and completing a complete automatic feeding cycle.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A feeding device for precision machining of bicycle chainrings, characterized in that, include: Rack module and feeding module; The frame module includes a machine base assembly and a drive assembly. The machine base assembly includes a table, a milling area, and a material tray. The table is provided with a milling area and a material tray. The material tray is rotatably mounted on the table, and a number of stacking assemblies are arranged on the material tray. The stacking assemblies are used to stack and assemble the toothed discs to be processed. The feeding module includes a pressing component and a lifting component. The pressing component is assembled on one side of the drive component. The pressing component includes a shaft pin seat, a slide rod, a rod pin seat and a pressure rod. The slide rod is fixedly arranged at the bottom of the shaft pin seat. One end of the rod pin seat is elastically slidably assembled on the slide rod. The other end of the rod pin seat is fixedly connected to the pressure rod. The pressure rod is used to press the stacked toothed discs from the top. The feeding module includes a lifting assembly, which is arranged on one side of the shaft pin seat. The lifting assembly includes a shaft cylinder, a pressure rod, and sliding vanes. The shaft cylinder is arranged on one side of the center of the gear plate. Several sliding vanes are elastically inserted into the bottom of the shaft cylinder. The pressure rod is linked to the rod pin seat and is used to drive the movement of several sliding vanes.

2. The feeding device for precision machining of bicycle chainrings according to claim 1, characterized in that, The machine tool assembly also includes a positioning frame, a reset rod, and a contact switch. The positioning frame is fixedly arranged in the milling area, and a reset rod is also provided on one side of the positioning frame. The contact switch is arranged on the table surface and is located near the material tray.

3. The feeding device for precision machining of bicycle chainrings according to claim 1, characterized in that, The drive assembly includes a main guide rail, a main platform, a telescopic guide rail, and a telescopic platform. The main guide rail is fixedly mounted on the platform, the main platform is slidably mounted on the main guide rail, the telescopic guide rail is fixedly mounted on the main platform, and the telescopic platform is slidably mounted on the telescopic guide rail. The drive assembly also includes a vertical plate, a lifting guide rail, a lifting platform, and a shaft bracket. The vertical plate is fixedly installed on the telescopic platform, the lifting guide rail is arranged at one end of the vertical plate, and the lifting platform is slidably mounted on the lifting guide rail. The shaft bracket is fixedly installed on one side of the lifting platform, and a guide shaft is also fixedly mounted on the shaft bracket.

4. The feeding device for precision machining of bicycle chainrings according to claim 3, characterized in that, The pressing assembly also includes a main support, side supports and a connecting plate. One end of the main support is slidably mounted on the guide shaft, and the other end of the main support is fixedly connected to the side supports and the connecting plate. The bottom of the axle pin seat is also provided with an axle pin, and the top of the rod pin seat is also provided with a rod pin. The axle pin and the rod pin are aligned.

5. The feeding device for precision machining of bicycle chainrings according to claim 1, characterized in that, The material lifting assembly also includes a material rack, an elastic element, a cone block, and a guide groove. One end of the material rack is fixedly installed on the connecting plate, and the other end of the material rack is fixedly connected to a shaft cylinder. The pressure rod is slidably inserted into the shaft cylinder, and an elastic element is also sleeved on the pressure rod. A cone block is fixedly installed at the bottom of the pressure rod. Several guide grooves are arranged at the bottom of the shaft cylinder, and several sliding pieces are elastically inserted into the guide grooves in the radial direction. One end of the sliding piece is also provided with an inclined surface, which movably abuts against the cone block.

6. The feeding device for precision machining of bicycle chainrings according to claim 1, characterized in that, The lifting assembly also includes alignment pins, with three sets of alignment pins arranged in a circumferential array at the outer diameter end of the shaft cylinder.

7. The feeding device for precision machining of bicycle chainrings according to claim 1, characterized in that, The stacking assembly includes a material rack, stacking rods, a toothed disc to be processed, toothed disc holes, and a central through hole. The material rack has three sets of stacking rods arranged along the circumferential direction. The toothed disc to be processed has six sets of toothed disc holes arranged circumferentially, and several toothed discs to be processed are stacked and inserted on the stacking rods.

8. The feeding device for precision machining of bicycle chainrings according to claim 5, characterized in that, The pressing assembly also includes a tilting plate, a top support arc plate, and a sliding groove. The tilting plate is rotatably mounted on the material rack. Top support arc plates are provided at both ends of the tilting plate, and a sliding groove is provided at one end of the tilting plate. The sliding groove is fitted onto the pressure rod. The pressing assembly also includes a locking rod, a driven shaft, a groove, a locking block, a limiting block, and a resetting component. The locking rod is fixedly arranged at one end of the top support arc plate. The driven shaft is rotatably mounted on the material rack, and the groove and locking block are coaxially fixedly installed on the driven shaft. The limiting block is fixedly installed on the material rack and movably abuts against the locking block. A resetting component is also coaxially arranged in the middle of the driven shaft.

Images