An automatic processing device for vehicle rearview mirror stem rolling

Abstract

The application discloses a kind of automatic processing device for vehicle rearview mirror mirror rod thread rolling, including work frame, push rod mechanism, linkage mechanism and avoidance component, push rod mechanism has mirror image symmetry and is set two groups of push rod component, linkage mechanism is connected with push rod cylinder, synchronous reverse linear motion is realized, each group of push rod component includes slidingly embedded in the recess of guide plate and is pushed block and is connected by unidirectional hinge structure guide block, unidirectional hinge structure makes pushed block rigid connection when pushing push rod piece, it can be turned outwards to realize avoidance when resetting, avoidance component is set to the side of guide plate, including turnover blanking plate and its drive cylinder.The application realizes the parallel operation of bar piece feeding, pushing, blanking by the cooperative work of two groups of push rod component, significantly improves thread rolling processing efficiency, effectively reduces equipment waiting time.

Description

Technical Field

[0001] This invention belongs to the field of mirror rod processing and relates to an automated processing device for thread rolling of vehicle rearview mirror rods. Background Technology

[0002] In the manufacturing process of rearview mirror stalks, threading one end is a crucial step, typically accomplished using a thread rolling machine through cold extrusion forming. After thread rolling, the surface of the stalk is then polished. Traditional thread rolling machine operations rely heavily on manual labor: the operator manually feeds the stalk between two thread rolling rollers, holding one end against the roller, and works in conjunction with the moving ejector pin on the machine to clamp the workpiece, ensuring stability during processing. After processing, the operator releases the stalk or reduces the resistance, only supporting it slightly, and the stalk is pushed out of its original position by the moving ejector pin. This method is not only inefficient and labor-intensive, but also poses certain safety hazards, and the processing quality is easily affected by human error.

[0003] To solve the above problems, the usual method in factories is to install an automatic feeding mechanism. The automatic feeding mechanism, together with the thread rolling machine, forms a non-standard equipment for processing vehicle rearview mirror rods within a certain length and weight range.

[0004] Patent document CN114535475A discloses a loading and unloading device for a thread rolling machine, comprising: a thread-by-thread loading mechanism and a pushing mechanism. The thread-by-thread loading mechanism includes: a first lifting drive mechanism, a lifting plate driven by the first lifting drive mechanism and extending along the height direction, and an inclined unloading plate inclined relative to the horizontal plane. The first lifting drive mechanism is used to transport workpieces supported on the top of the lifting plate to the inclined unloading plate. The pushing mechanism includes: a second lifting drive mechanism, a lifting frame driven by the second lifting drive mechanism and having a horizontal conveying groove, a horizontal linear pushing drive mechanism disposed on the lifting frame, a pushing rod driven by the horizontal linear pushing drive mechanism and movably inserted into the horizontal conveying groove, and a discharge conveying mechanism located directly above or below the lifting frame.

[0005] However, the aforementioned existing technologies still have the following problems:

[0006] The loading and unloading process of this device is a strictly sequential loop containing multiple necessary steps. This operating mode leads to the following efficiency bottlenecks:

[0007] 1. Inherent "Avoidance and Waiting" Time: Since the inlet and outlet of the thread rolling machine are at the same position, after the feeding mechanism completes the feeding, it must adjust the height of the lifting frame to avoid the discharge path. During the entire workpiece processing and discharge period, the entire feeding system (including the lifting frame and its horizontal conveyor trough) is in a stopped and waiting state, and cannot carry out any operation to prepare the next workpiece. This causes the thread rolling machine to be unable to immediately obtain a new workpiece for processing after completing the processing, resulting in frequent idle time for the thread rolling machine and reduced equipment utilization.

[0008] 2. Processes cannot be parallelized, and cycle time is forced to be extended: Since the workpiece slides into the horizontal conveyor trough by gravity through a fixed inclined feeding plate, and the conveyor trough is at a high or low position during the avoidance period, it is disconnected from the feeding path. Therefore, it is impossible to prepare materials for the next cycle in advance during the processing stage. It is necessary to wait for the current workpiece to be completely discharged and the lifting frame to be reset before the preparation for the next workpiece to be conveyed can begin. This makes it impossible for the feeding cycle of the loading and unloading device to match the processing cycle of the thread rolling machine itself, which seriously restricts the further improvement of overall production efficiency.

[0009] While it is possible to consider adding a separate robotic arm to directly grab the workpiece at the discharge port to avoid collisions, this approach usually requires significant adjustments to the existing equipment layout. This not only increases the structural complexity and control difficulty of the system but also significantly raises manufacturing and maintenance costs, making it uneconomical. Summary of the Invention

[0010] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an automated processing device for thread rolling of vehicle rearview mirror rods. This device solves the technical problem of low loading and unloading efficiency caused by the sequential operation of the loading and unloading device in the prior art, which requires some workstations to stop and wait.

[0011] The objective of this invention can be achieved through the following technical solutions:

[0012] An automated machining device for thread rolling of a vehicle rearview mirror stalk includes a working frame;

[0013] The push rod mechanism includes a push rod cylinder, a guide plate fixed to the working frame, and two sets of push rod assemblies arranged in a mirror-symmetrical manner; the top surface of the guide plate has a groove for supporting and guiding the rod.

[0014] The two sets of push rod assemblies are connected to the push rod cylinder through a linkage mechanism, and are driven by the push rod cylinder to make synchronous, opposite linear movements along the guide plate.

[0015] An obstacle avoidance assembly is provided on one side of the guide plate, including a feeding plate and a feeding cylinder that drives the feeding plate to flip. The feeding plate is flip-mounted on the working frame to receive and guide the rods pushed out from the guide plate.

[0016] Each push rod assembly includes a pusher block that is slidably embedded in the groove, and a guide block that is rotatably connected to the pusher block by a one-way hinge structure and slidably disposed on the guide plate;

[0017] The one-way hinge structure is configured such that when a thrust is applied from the end away from the rod, the pusher block and the guide block remain rigidly connected to push the rod together; when a thrust is applied from the end toward the rod, the pusher block can be forced to flip outward around its guide block to avoid the thrust.

[0018] Two sets of mirror-symmetrical push rod assemblies, working in conjunction with a linkage mechanism, achieve synchronous reverse linear motion. This allows the preceding set of rods to be processed while the following set is already being prepared for loading, enabling parallel processing and material preparation. The use of a unidirectional hinge structure allows the push block to automatically flip and avoid obstacles during reset, and the coordination of the obstacle avoidance components prevents downtime caused by obstacle avoidance waiting in traditional equipment, significantly shortening the production cycle time.

[0019] Furthermore, the linkage mechanism includes a gear rotatably mounted on the bottom of the guide plate, two racks respectively meshing with the gear and symmetrically arranged, and a connecting rod connecting the guide block to the corresponding rack; the telescopic end of the push rod cylinder is fixed to one of the racks to drive the two racks to move in opposite directions, the guide plate has a through hole for the connecting rod to pass through, and one end of the through hole and groove is an opening that penetrates the guide plate, forming a through-type design.

[0020] The gear and rack linkage mechanism ensures precise synchronization of the movement of the two sets of push rod assemblies, avoiding jamming or waiting time caused by asynchronous movement. The through-hole design significantly reduces installation and maintenance time, and the through-hole and groove structure reduces parts replacement time.

[0021] Furthermore, the one-way hinge structure includes a rotating shaft fixed to the pusher block and two torsion springs providing reset torque; the guide block has a shaft hole for the rotating shaft to pass through, and a notch is opened at one end of the guide block; a rotating block located outside the groove is fixed on the top of the pusher block, and one end of the rotating block is embedded in the notch; the rotating shaft is fixed to the rotating block; the shaft hole consists of two symmetrically arranged mounting holes that connect to the notch and two reset holes that are respectively connected to the corresponding mounting holes; the two mounting holes are located between the two reset holes, and the diameter of the mounting holes is smaller than that of the reset holes; the two ends of the rotating shaft are respectively rotatably disposed in the two mounting holes; the two torsion springs are respectively sleeved and fixed at both ends of the rotating shaft and respectively embedded in the two reset holes; the two ends of the torsion springs abut against the inner wall of the corresponding mounting hole; and an avoidance groove is opened on the inner side wall of the notch for one end of the rotating block to pass through.

[0022] The combination of the torsion spring and the reset hole provides a stable reset torque, ensuring that the pusher block can quickly and accurately reset after avoiding obstacles. The design of the avoidance groove makes the rotating block rotate smoothly, so that one end of the rotating block will not be obstructed when rotating.

[0023] Furthermore, the top of the feeding plate has a guide groove that matches the groove, and the bottom wall of the groove and the bottom wall of the guide groove are both provided with arc-shaped grooves. Two symmetrically arranged reset springs are fixed between the feeding plate and the working frame, and the bottom wall of the groove is provided with two guide inclined surfaces that are symmetrically arranged relative to the arc-shaped grooves.

[0024] Furthermore, two symmetrically arranged support blocks are fixed inside the working frame. The upper ends of the two support blocks abut against the lower ends of the corresponding two racks. A slider is fixed at one end of the connecting rod. A groove for the slider to be embedded is opened on the inner side wall of the through hole. One end of the groove is an opening that penetrates the guide plate, forming a through-type design.

[0025] The support block provides stable bottom support for the rack, avoiding accuracy deviation caused by vibration and enabling the equipment to maintain long-term stable operation. The cooperation between the slider and the groove ensures that when the connecting rod moves outside the guide plate, one end of the slider is still embedded in the groove, which restricts the displacement of the connecting rod, maintains stability, and improves the accuracy of reset.

[0026] Furthermore, it also includes a thread rolling machine for processing rods and ejecting the processed rods, the thread rolling machine being located on one side of the working frame; a feeding mechanism for conveying rods one by one into the groove; and a conveying mechanism installed in the working frame for catching and transporting the rods ejected from the thread rolling machine to the outside of the working frame.

[0027] Furthermore, the end of the guide plate is provided with two sets of mechanical avoidance mechanisms symmetrically arranged relative to the groove, the mechanical avoidance mechanisms including:

[0028] A stop block is flexibly disposed at the top of the guide plate;

[0029] A connecting groove is provided on the guide plate for the pusher block in the avoidance state to pass through; the connecting groove is located on one side of the stop block.

[0030] A reset groove is formed on the guide plate and communicates with both the connecting groove and the recess.

[0031] When a set of push rod assemblies is reset, its push block contacts and is blocked by the stop block, forcing the push block to rotate around its guide block and enter the connecting groove; the push block moves along the connecting groove and finally enters the reset groove, and is restored to the state of being aligned with the groove under the action of the torsion spring of the one-way hinge structure, thus completing the reset.

[0032] The complete mechanical avoidance path is formed by the stop, connecting groove and reset groove set at the end of the guide plate, so that the avoidance action of the pusher block is completed outside the groove. The pusher block in the reset is completely separated from the pusher block in the forward movement, and there is no mutual contact or squeezing, which greatly reduces the movement resistance. The rod is completely unaffected by the avoidance action during the conveying process, ensuring that the pushing process is more stable and smooth.

[0033] Furthermore, the groove is a V-shaped groove, the lower end of the pusher block is a V-shaped plate adapted to the V-shaped groove, the top of the feed plate is provided with a V-shaped limiting groove adapted to the groove and allowing the lower end of the pusher block to pass through, the stop block is elastically set in the lifting groove at the end of the guide plate by a reset spring, the outer wall of the stop block is fixed with symmetrically arranged lifting blocks near the lowest end of the guide slope, the vertical inner wall of the lifting groove is opened with a vertical groove for the lifting blocks to be embedded, and the end of the stop block near the connecting groove is fixed with an adjusting block located outside the guide plate.

[0034] The combination of the lifting block and the vertical groove is designed to prevent one end of the stop block from tilting when the guide block moves to the highest point of the guide slope, thus ensuring that the stop block always maintains a vertical movement trajectory. The adjustment block is designed to allow the pusher block to enter the connecting groove better and more accurately.

[0035] Furthermore, the top of the stop block is provided with a guide slope, and the upper end of the push block is divided into a rotating block located outside the groove. The push block is rotatably connected to the guide block through the rotating block. The stop block has a raised position and a pressed position in the lifting groove. When the rotating block moves towards the lower material plate with the push rod assembly, it presses the stop block to the pressed position along the guide slope. When the rotating block resets with the push rod assembly, the stop block is in the raised position and one end abuts against the rotating block, forcing the push block to rotate.

[0036] Furthermore, an extension plate is fixed to one end of the feeding plate. The extension plate is located on one side of the V-shaped limiting groove, and its top surface has an extension groove that communicates with the V-shaped limiting groove.

[0037] The main technical effects of this invention are reflected in the following aspects:

[0038] 1. This invention achieves a fundamental shift in the processing flow from "serial" to "parallel" by cooperating with two sets of mirror-symmetrically arranged push rod assemblies and their linkage mechanism and feeding mechanism.

[0039] This invention effectively eliminates the "waiting time" required by the prior art due to the alignment of inlet and outlet. Through the cooperation of the push rod mechanism and the linkage mechanism, one set of push rod assemblies pushes a new rod into the thread rolling machine while another set of push rod assemblies simultaneously resets and receives the new rod delivered by the feeding mechanism. This allows the thread rolling machine to immediately begin processing the next rod after completing the processing of one rod without any waiting time. Theoretically, the production cycle time of the entire system can be significantly shortened, rather than being the accumulation of multiple steps, maximizing equipment utilization and thus improving processing efficiency.

[0040] Processing and material preparation in parallel: While the current set of rods is being processed in the thread rolling machine, the next set of push rod assemblies has been reset to the receiving station and the material preparation of the new rods has been completed through the feeding mechanism, and is in a "ready to go" state.

[0041] Pushing and unloading in parallel: When the previous rod is finished and pushed out of the thread rolling machine, the next rod is immediately pushed; at the same time, the unloading plate is flipped under the drive of the cylinder to unload the processed rod.

[0042] Continuous operation: The unloading plate quickly resets before the next rod arrives, ensuring that the rod conveying path is unobstructed. This ingenious timing coordination enables the loading, processing, and unloading processes, which originally had to be sequential, to achieve a high degree of overlap, eliminating equipment waiting time, shortening the production cycle to almost pure processing time, and maximizing equipment utilization.

[0043] 2. Through a unique unidirectional hinge structure design, during the pusher assembly reset process, when the subsequent pusher block encounters the preceding pusher block, the former can push the latter to rotate outward for instantaneous avoidance, and then automatically reset under the action of the torsion spring. This purely mechanical avoidance solution:

[0044] High reliability: It does not require a complex sensor control system and achieves intelligent obstacle avoidance through its mechanical structure itself.

[0045] It does not affect the path of the rod: the rod always moves along the same groove path, without having to change its trajectory to avoid obstacles, thus ensuring machining accuracy and stability.

[0046] 3. Example 2: Based on Example 1, further optimization of the obstacle avoidance method is achieved by introducing an independent mechanical obstacle avoidance mechanism.

[0047] The avoidance process is smoother and less strenuous: the stop block, connecting groove, and reset groove set at the end of the guide plate form a complete mechanical avoidance path, allowing the pusher block to complete its avoidance action outside the groove.

[0048] Non-contact avoidance: The pusher block in the resetting process is completely separated from the pusher block in the forward process, and there is no mutual contact or squeezing, which greatly reduces the motion resistance.

[0049] Undisturbed movement of the rods: The rods are completely unaffected by avoidance actions during the conveying process, ensuring a smoother and more stable pushing process. Attached Figure Description

[0050] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 1 ;

[0051] Figure 2 This is a schematic diagram of the guide plate and pusher assembly according to Embodiment 1 of the present invention;

[0052] Figure 3 This is a partial structural schematic diagram of Embodiment 1 of the present invention;

[0053] Figure 4 This is an exploded view of the feeding assembly according to Embodiment 1 of the present invention;

[0054] Figure 5 This is a cross-sectional view of the guide block according to Embodiment 1 of the present invention;

[0055] Figure 6 This is a structural schematic diagram of Embodiment 1 of the present invention. Figure 2 ;

[0056] Figure 7 This is a flowchart of the loading and unloading of the rods according to Embodiment 1 of the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0058] Figure 9 This is Embodiment 2 of the present invention. Figure 8 Enlarged view of point A in the middle;

[0059] Figure 10 This is an assembly diagram of the push rod mechanism and avoidance component according to Embodiment 2 of the present invention;

[0060] Figure 11 This is a partial structural schematic diagram of Embodiment 2 of the present invention. Figure 1 ;

[0061] Figure 12 This is Embodiment 2 of the present invention. Figure 11 Enlarged view of point B in the middle;

[0062] Figure 13 This is an assembly cross-sectional view of the guide plate and linkage mechanism according to Embodiment 2 of the present invention;

[0063] Figure 14 This is a partial structural schematic diagram of Embodiment 2 of the present invention. Figure 2 .

[0064] Explanation of reference numerals in the attached drawings: 1. Working frame; 11. Push rod cylinder; 12. Feeding plate; 121. Guide chute; 122. Arc-shaped groove; 13. Feeding cylinder; 14. Reset spring; 15. Support block; 16. Drive motor; 17. Conveyor belt;

[0065] 2. Guide plate; 21. Groove; 22. Through hole; 23. Slide groove;

[0066] 3. Push block; 31. Rotating shaft; 32. Rotating block;

[0067] 4. Guide block; 41. Torsion spring; 42. Notch; 43. Mounting hole; 44. Reset hole; 45. Clearance groove;

[0068] 5. Gear; 51. Rack; 52. Connecting rod; 53. Slider;

[0069] 6. Thread rolling machine; 7. Storage frame; 71. Feeding cylinder; 72. Lifting plate; 73. Inclined plate; 74. Material blocking plate; 75. Storage plate; 76. Rotary cylinder;

[0070] 8. Stop block; 81. Connecting groove; 82. Reset groove; 83. V-shaped limit groove; 84. Reset spring; 85. Lifting groove; 851. Vertical groove; 86. Guide slope; 87. Extension plate; 88. Lifting block; 89. Adjusting block;

[0071] 9. Front rod; 91. Rear rod; 92. Front pusher block; 93. Rear pusher block. Detailed Implementation

[0072] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. Example 1

[0073] like Figure 1-3 As shown in Figures 7 and 8, an automated processing device for thread rolling of a vehicle rearview mirror rod includes a working frame 1, a push rod mechanism, a linkage mechanism, an obstacle avoidance component, and a thread rolling machine 6. The working frame 1 is the support frame of the entire device and is made of square tubing welded together, which has sufficient rigidity and stability.

[0074] The push rod mechanism includes a push rod cylinder 11, a guide plate 2 fixed on the working frame 1, and two sets of push rod assemblies arranged in a mirror symmetrical manner; the top surface of the guide plate 2 is provided with a groove 21 for supporting and guiding the rod;

[0075] The two sets of push rod assemblies are connected to the push rod cylinder 11 through a linkage mechanism, and are driven by the push rod cylinder 11 to make synchronous, opposite linear movements along the guide plate 2.

[0076] An obstacle avoidance assembly is disposed on one side of the guide plate 2. The obstacle avoidance assembly includes a feeding plate 12 and a feeding cylinder 13 that drives the feeding plate 12 to flip. The feeding plate 12 is flipped and disposed on the working frame 1 to receive and guide the rods pushed out from the guide plate 2. The top of the feeding plate 12 has a guide groove 121 that matches the groove 21. The bottom wall of the groove 21 and the bottom wall of the guide groove 121 are both provided with arc grooves 122. Two symmetrically arranged reset tension springs 14 are fixed between the feeding plate 12 and the working frame 1. The bottom wall of the groove 21 is provided with two guide slopes that are symmetrically arranged relative to the arc grooves 122. The arc grooves 122 play a certain limiting and guiding role for the rods. The design of the two guide slopes allows the rods to be centered, ensuring the accuracy of the feeding position of the rods and the conveying path of the rods.

[0077] Each push rod assembly includes a pusher block 3 that is slidably embedded in the groove 21, and a guide block 4 that is rotatably connected to the pusher block 3 via a one-way hinge structure and slidably disposed on the guide plate 2;

[0078] The one-way hinge structure is configured such that when a thrust is applied from the end away from the rod, the pusher block 3 and the guide block 4 remain rigidly connected to push the rod together; when a thrust is applied from the end toward the rod, the pusher block 3 can be forced to flip outward around its guide block 4 to avoid the thrust.

[0079] The above-mentioned structure is compact and reliable, and is specifically designed for efficient loading and unloading of specific rods (vehicle rearview mirror rods). This invention is designed for non-standard equipment used to process mirror rods within a specific length and weight range. Therefore, when the next rod pushes the previous rod, the pusher block 3 rotates, and one end of the pusher block 3 abuts against the next rod. Due to the setting of two guide slopes and arc grooves 122, and with the addition of the rod's own weight, the pusher block 3 will not push the rod under the combined action of the two guide slopes, arc grooves 122, and the rod's own weight, causing the rod to deviate from its original conveying path. At the same time, due to the high conveying speed of the rod, the force exerted by the pusher block 3 on one side of the rod can be almost ignored. The overall structure of this invention is compact, with a single power source (one pusher cylinder 11). It achieves precise synchronous reverse motion through the linkage mechanism of the purely mechanical gear 5 and rack 51. The operation is reliable, with a low failure rate, and is very suitable for continuous and stable operation on large-scale, high-speed production lines such as automotive parts production lines.

[0080] like Figure 7 As shown

[0081] The front rod 9 is the rod to be processed or processed pushed by the previous set of push rod assemblies, and the rear rod 91 is the rod to be processed pushed by the next set of push rod assemblies; the front push block 92 is the push block of the previous set of push rod assemblies, and the rear push block 93 is the push block of the next set of push rod assemblies.

[0082] First stage: The front rod 9 is threaded at the thread rolling machine 6. At the same time, the rear rod 91 is prepared by entering the groove 21. After being automatically centered by the guide slope, the rear rod 91 is precisely positioned in the arc groove 122 of the groove 21.

[0083] Second stage: After the front rod 9 is processed, the thread rolling machine 6 pushes it out. At the same time, the push rod cylinder 11 is started, and the two sets of push rod assemblies are driven to move synchronously in opposite directions through the linkage mechanism of gear 5 and rack 51. The latter set of push rod assemblies pushes the rear rod 91 forward toward the thread rolling machine 6, and the former set of push rod assemblies is reset accordingly.

[0084] Third stage: The feeding cylinder 13 drives the feeding plate 12 to flip, and the processed front rod 9 slides down along the guide groove 121. At the same time as the telescopic rod of the feeding cylinder 13 resets, the reset spring 14 ensures that the feeding plate 12 completes feeding and resets in a very short time. Before the rear rod 91 reaches the position of the feeding plate 12, the feeding plate 12 has returned to a horizontal state, ensuring that the conveying path is unobstructed.

[0085] Fourth stage: When the next set of push rod assemblies continues to move forward, its rear push block 93 meets the front push block 92 that is resetting. At the moment of contact, the front push block 92 rotates outward around the guide block 4 under the action of thrust to achieve instantaneous avoidance. Due to the limiting and guiding effect of the guide slope and the arc groove 122 and the weight of the rod, the resetting force of the push block 3 is much less than the positioning resistance of the rod, which is insufficient to push the rod to deviate. The rear rod 91 remains stable and will not deviate. When the rear push block 93 has completely moved in front of the front push block 92, the front push block 92 quickly resets under the action of the one-way hinge structure, preparing for the next working cycle.

[0086] It achieves a high degree of overlap between the four processes of processing, feeding, pushing, and unloading. Throughout the entire process, the thread rolling machine 6 requires almost no waiting time, greatly improving equipment utilization.

[0087] like Figure 1-3 As shown, the linkage mechanism includes a gear 5 rotatably mounted on the bottom of the guide plate 2, two racks 51 respectively meshing with the gear 5 and symmetrically arranged, and a connecting rod 52 connecting the guide block 4 to the corresponding rack 51; the telescopic end of the push rod cylinder 11 is fixed to one of the racks 51 to drive the two racks 51 to move in opposite directions; two symmetrically arranged support blocks 15 are fixed inside the working frame 1, and the upper ends of the two support blocks 15 respectively abut against the lower ends of the corresponding two racks 51; a slider 53 is fixed to one end of the connecting rod 52; a groove 23 is opened on the inner side wall of the through hole 22 for the slider 53 to be embedded; the support block 15 provides stable bottom support for the rack 51, avoiding accuracy deviation caused by vibration, so that the equipment can maintain long-term stable operation; the cooperation between the slider 53 and the groove 23 means that when the connecting rod 52 moves outside the guide plate 2, one end of the slider 53 is still embedded in the groove 23, so that the connecting rod 52 is restricted from displacement, which can maintain stability and improve the reset accuracy. The drive push rod cylinder 11 drives the rack 51 fixed to its telescopic end to move. The rack 51 drives another rack 51 to move synchronously in the opposite direction through the gear 5.

[0088] One end of the slide groove 23 is an opening that penetrates the guide plate 2, forming a through-type design. The guide plate 2 has a through hole 22 for the connecting rod 52 to pass through. One end of the through hole 22 and the groove 21 is an opening that penetrates the guide plate 2. The through-type design greatly shortens the installation and maintenance time and significantly reduces the time required to replace parts.

[0089] like Figure 2 , 4As shown in Figure 5, the one-way hinge structure includes a rotating shaft 31 fixed to the pusher block 3 and two torsion springs 41 providing a reset torque; the guide block 4 has a shaft hole for the rotating shaft 31 to pass through, and a notch 42 is opened at one end of the guide block 4. The top of the pusher block 3 is fixed with a rotating block 32 located outside the groove 21, and the rotating block 32 is embedded in the notch 42. The rotating shaft 31 is fixed to the rotating block 32; the shaft hole consists of two symmetrically arranged mounting holes 43 that connect the notch 42 and the notch 42. Two reset holes 44 are respectively connected to the corresponding mounting holes 43. The two mounting holes 43 are located between the two reset holes 44. The diameter of the mounting holes 43 is smaller than that of the reset holes 44. The two ends of the rotating shaft 31 are respectively rotatably disposed in the two mounting holes 43. The two torsion springs 41 are respectively sleeved and fixed at both ends of the rotating shaft 31 and respectively embedded in the two reset holes 44. The two ends of the torsion springs 41 abut against the inner wall of the mounting holes 43. The inner side wall of the notch 42 has a relief groove 45 for one end of the rotating block 32 to pass through.

[0090] In normal operation, push block 3 is in the open position, and push rod cylinder 11 drives guide block 4 to move forward (towards the rod). Push block 3 is subjected to the reaction force of the rod, which is transmitted to rotating block 32, resulting in a tendency for rotating block 32 to rotate counterclockwise. Under this rotational tendency, one side of rotating block 32, which can be understood as the "driving side", will tightly abut against the corresponding inner wall of notch 42. Since the inner wall of notch 42 is rigid and cannot be deformed or rotated, this abutment relationship transforms the rotational tendency into a large positive locking force, making it impossible for rotating block 32 to rotate relative to guide block 4. At this time, rotating block 32, rotating shaft 31, and guide block 4 are as if welded together, forming a whole that moves forward and reliably pushes the rod.

[0091] When the previous pusher block 3 retracts, the rod to be threaded behind pusher block 3 obstructs its retraction. At this time, the rod applies a reverse force to pusher block 3. This force generates a clockwise rotational tendency on the rotating block 32, which is opposite to the previous rotation. Under this rotational tendency, the "driving side" of rotating block 32 will disengage from the inner wall of notch 42. With the help of the clearance groove 45, the rotational trajectory of one end of rotating block 32 is precisely accommodated by clearance groove 45. Clearance groove 45 is a channel with a precisely calculated position and shape. It provides the necessary physical space for the rotating end of rotating block 32 during rotation. Due to the presence of clearance groove 45, one end of rotating block 32 will not structurally interfere with notch 42 or other parts of guide block 4 during rotation. This allows pusher block 3 to flip smoothly, thereby achieving the purpose of avoiding the rod.

[0092] like Figure 1 , 3As shown in Figure 6, it also includes a feeding mechanism that feeds the rods one by one into the groove 21, and a conveying mechanism installed in the working frame 1 for catching the rods that fall from the thread rolling machine 6 and transporting them to the outside of the working frame 1. The thread rolling machine 6 is located on one side of the working frame 1. The thread rolling machine 6 is used to process the rods and can push out the processed rods.

[0093] The feeding mechanism includes a storage frame 7, a feeding cylinder 71, a rotary cylinder 76, a lifting plate 72, an inclined plate 73, and a baffle plate 74. The top of the storage frame 7 is an inclined storage plate 75. A feeding gap is formed between the storage frame 7 and the working frame 1 for the lifting plate 72 to move up and down. The lifting plate 72 is fixedly connected to the telescopic end of the feeding cylinder 71, and its upper end is provided with an inclined surface that connects with the upper end of the storage plate 75. The inclined plate 73 is fixed on the bracket. The baffle plate 74 is rotatably mounted on the bracket through a mounting shaft and abuts against the inclined plate 73 to prevent the rod from slipping. One end of the rotary cylinder 76 is rotatably mounted on the storage frame 7. One end of the mounting shaft is fixed with a drive rod. The output end of the rotary cylinder 76 is fixed with a connecting block. The connecting block has a round hole. One end of the drive rod is fixed with a cylinder. One end of the cylinder passes through the round hole. The connecting block is sleeved on the cylinder through the round hole. The connecting block can rotate relative to the cylinder.

[0094] The conveying mechanism includes a drive motor 16, two conveying rollers, and a conveyor belt 17 sleeved on the conveying rollers. The drive motor 16 is connected to the rotating shaft of one of the conveying rollers. A portion of the conveyor belt 17 is located directly below the unloading plate 12 to receive the falling rods.

[0095] Under the influence of gravity, the rods roll along the inclined storage plate 75 and naturally accumulate at the feeding gap formed between the bottom of the storage frame 7 and the working frame 1. First, the feeding cylinder 71 is driven, extending its telescopic rod and pushing the lifting plate 72 vertically upward. The lifting plate 72 lifts the bottommost rod on its inclined surface. Due to the precise design of the thickness and feeding gap of the lifting plate 72, as it rises, the plate itself effectively blocks and separates the rods accumulated above it, ensuring that only the bottommost rod is stably lifted each time, thus achieving single-rod feeding. The lifting plate 72 continues to rise until its top holds the single rod. The rod is lifted and smoothly transferred to the inlet end of the inclined plate 73. Under the action of gravity, the rod rolls down the inclined plate 73 until it is blocked by the closed baffle plate 74. When it is necessary to feed material to the equipment behind, the rotary cylinder 76 is driven, which in turn drives the baffle plate 74 to swing, so that the rod slides down the inclined plate 73. When the baffle plate 74 is closed, the feeding cylinder 71 is started at the same time, lifting the single rod and smoothly transferring it to the inlet end of the inclined plate 73, realizing continuous feeding of the rod. The process of the rod entering the inlet end of the inclined plate 73 is completed simultaneously with the rod in the groove 21 when it is pushed out, realizing parallel operation and saving processing time.

[0096] The specific operation method of Embodiment 1 of the present invention is as follows;

[0097] The front rod 9 is threaded at the thread rolling machine 6. The rotating cylinder 76 drives the baffle plate 74 to swing, so that the rod slides down the inclined plate 73 into the groove 21. It is automatically centered and positioned by the guide inclined surface. After the front rod 9 is processed, the thread rolling machine 6 pushes it to the unloading plate 12. At the same time, the push rod cylinder 11 is started and driven by the gear 5 and rack 51 mechanism.

[0098] The next set of push rod assemblies pushes the rear rod 91 towards the thread rolling machine 6, and the previous set of push rod assemblies resets accordingly. At the same time, the feeding cylinder 71 pushes the lifting plate 72 to rise, sending the single rod to the inclined plate 73.

[0099] During the conveying process, the feeding cylinder 13 drives the feeding plate 12 to flip, and the processed front rod 9 slides down to the conveyor belt 17. The telescopic end of the feeding cylinder 13 resets, and at the same time, the reset spring 14 makes the feeding plate 12 quickly reset before the rear rod 91 arrives.

[0100] When one end of the rear rod 91 abuts against the front pusher block 92, the front pusher block 92 rotates outward to avoid it under the action of the one-way hinge structure until the rear pusher block 93 passes. Then, the front pusher block 92 automatically resets under the action of the torsion spring 41. When the rear rod 91 enters the thread rolling machine 6 for processing through the feed plate 12, the front pusher block 92 moves to the initial position. At this time, the drive rotary cylinder 76 drives the baffle plate 74 to swing, so as to add new rods into the groove 21.

[0101] Through the above process, this device achieves time overlap of multiple processes such as thread rolling machine 6 processing, feeding mechanism feeding, adding new rods in groove 21, pushing rods and unloading. After completing the processing of one rod, thread rolling machine 6 can quickly start processing the next rod, greatly reducing equipment waiting time and thus improving overall production efficiency. It is especially suitable for the mass automated production of vehicle rearview mirror rods. Example 2

[0102] Based on Example 1, Example 2 optimizes and improves the avoidance mechanism between the two pusher blocks 3, making the conveying process of the rod more stable, smooth, and labor-saving.

[0103] like Figure 8-14 As shown, the end of the guide plate 2 is provided with two sets of mechanical avoidance mechanisms symmetrically arranged relative to the groove 21. The mechanical avoidance mechanism includes: a stop block 8 elastically disposed at the top of the guide plate 2; and a connecting groove 81 opened on the guide plate 2 for the pusher block 3 in the avoidance state to pass through. The connecting groove 81 is located on one side of the stop block 8.

[0104] A reset groove 82 is formed on the guide plate 2 and communicates with both the connecting groove 81 and the recess 21;

[0105] When a set of push rod assemblies is reset, its push block 3 contacts and is blocked by the stop block 8, forcing the push block 3 to rotate around its guide block 4 and enter the connecting groove 81; the push block 3 moves along the connecting groove 81 and finally enters the reset groove 82, and is restored to the state of being aligned with the groove 21 under the action of the torsion spring of the one-way hinge structure, thus completing the reset.

[0106] The groove 21 is a V-shaped groove, and the lower end of the pusher block 3 is a V-shaped plate adapted to the V-shaped groove. The size of the pusher block 3 is slightly smaller than the size of the groove 21, and its outer wall does not contact the inner wall of the groove 21. The top of the feed plate 12 is provided with a V-shaped limiting groove 83 adapted to the groove 21 and allowing the lower end of the pusher block 3 to pass through. The stop block 8 is elastically set in the lifting groove 85 at the end of the guide plate 2 by a reset spring 84. The outer wall of the stop block 8 is fixed with symmetrically arranged lifting blocks 88 near the lowest end of the guide slope 86. The vertical inner wall of the lifting groove 85 has a vertical groove 851 for the lifting blocks 88 to be embedded. The upper end of the vertical groove 851 passes through the guide plate 2 and is connected to the outside of the guide plate 2. The end of the stop block 8 near the connecting groove 81 is fixed with an adjusting block 89 located outside the guide plate 2.

[0107] The lifting block 88 and the vertical groove 851 are designed to prevent one end of the stop block 8 from tilting when the guide block 4 moves to the highest point of the guide slope 86. The adjusting block 89 is designed to allow the pusher block 3 to enter the connecting groove 81 better and more accurately.

[0108] The top of the stop block 8 is provided with a guide slope 86. The upper end of the push block 3 is divided into a rotating block 32 located outside the groove 21. The push block 3 is rotatably connected to the guide block 4 through the rotating block 32. The stop block 8 has a raised position and a pressed position in the lifting groove 85. When the rotating block 32 moves with the push rod assembly towards the lower material plate 12, it presses the stop block 8 to the pressed position along the guide slope 86. When the rotating block 32 is reset with the push rod assembly, the stop block 8 is in the raised position and one end abuts against the rotating block 32, forcing the push block 3 to rotate.

[0109] An extension plate 87 is fixed to one end of the feed plate 12. The extension plate 87 is located on one side of the V-shaped limiting groove 83 and has an extension groove that communicates with the V-shaped limiting groove 83. The extension plate 87 and the extension groove cooperate to achieve better guidance for the rod and reduce the height difference between the rod and the conveyor belt 17 when the rod slides down along the feed plate 12, thereby reducing the probability of damage when the rod falls.

[0110] The specific operation method of Embodiment 2 of the present invention is as follows:

[0111] When the push rod assembly moves toward the thread rolling machine 6, the rotating block 32 on the pusher block 3 moves along the guide slope 86 of the stop block 8;

[0112] As the stop block 8 is gradually pressed completely into the lifting groove 85, the pusher block 3 remains in its original state and passes smoothly through the position of the stop block 8.

[0113] When the current set of push rod assemblies is reset, the stop block 8 is in the raised position under the action of the reset spring 84. The rotating block 32 on the push block 3 contacts the end of the stop block 8 and is blocked. Under the blocking action of the stop block 8, the push block 3 rotates outward around the guide block 4. With the assistance of the adjusting block 89, the push block 3 enters the connecting groove 81.

[0114] The pusher block 3 is fully inserted into the connecting groove 81, and remains in the rotated state within the groove and moves. At this time, the pusher block 3 is completely separated from the subsequent rod in the groove 21 without any contact. No frictional resistance is generated during the avoidance process, and the movement is more effortless.

[0115] When the pusher block 3 moves along the connecting groove 81 into the reset groove 82, under the action of the torsion spring 41 of the one-way hinge structure, the pusher block 3 automatically returns to the vertical state and realigns with the groove 21 (V-groove) to prepare for the next work cycle.

[0116] Embodiment 2 of the present invention achieves a complete avoidance path for the pusher block 3 outside the groove 21. Compared with Embodiment 1, the pusher block 3 is completely separated from the rod during the avoidance process, eliminating contact friction and greatly reducing the resistance during the pushing process, making the equipment more energy-efficient. At the same time, the cooperation between the V-groove and the V-plate enhances the positioning stability of the rod, and the design of the extension plate 87 reduces the drop height of the rod, effectively protecting the surface quality of the workpiece.

[0117] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. An automated machining device for thread rolling of a vehicle rearview mirror stalk, characterized in that, Includes the work frame (1); The push rod mechanism includes a push rod cylinder (11), a guide plate (2) fixed on the working frame (1), and two sets of push rod assemblies arranged in a mirror symmetry; the top surface of the guide plate (2) is provided with a groove (21) for supporting and guiding the rod. The two sets of push rod assemblies are connected to the push rod cylinder (11) through a linkage mechanism, and are driven by the push rod cylinder (11) to make synchronous, opposite linear movements along the guide plate (2); The avoidance component is located on one side of the guide plate (2) and includes a feeding plate (12) and a feeding cylinder (13) for driving the feeding plate (12) to flip. The feeding plate (12) is flipped on the working frame (1) to receive and guide the rods pushed out from the guide plate (2). Each push rod assembly includes a push block (3) that is slidably embedded in the groove (21) and a guide block (4) that is rotatably connected to the push block (3) through a one-way hinge structure and slidably disposed on the guide plate (2). The one-way hinge structure is configured such that when a thrust is applied from the end away from the rod, the pusher block (3) and the guide block (4) remain rigidly connected to push the rod together; when a thrust is applied from the end toward the rod, the pusher block (3) can be forced to flip outward around its guide block (4) to avoid the rod.

2. The automated machining device for thread rolling of a vehicle rearview mirror rod according to claim 1, characterized in that, The linkage mechanism includes a gear (5) rotatably mounted on the bottom of the guide plate (2), two racks (51) respectively meshing with the gear (5) and symmetrically arranged, and a connecting rod (52) connecting the guide block (4) to the corresponding rack (51); the telescopic end of the push rod cylinder (11) is fixed to one of the racks (51) to drive the two racks (51) to move in opposite directions; the guide plate (2) has a through hole (22) for the connecting rod (52) to pass through; one end of the through hole (22) and the groove (21) is an opening that penetrates the guide plate (2), forming a through-type design.

3. The automated machining device for thread rolling of a vehicle rearview mirror rod according to claim 2, characterized in that, The one-way hinge structure includes a rotating shaft (31) fixed to the pusher block (3) and two torsion springs (41) providing a reset torque; the guide block (4) is provided with a shaft hole for the rotating shaft (31) to pass through, and a notch (42) is opened at one end of the guide block (4). The top of the pusher block (3) is fixed with a rotating block (32) located outside the groove (21), and one end of the rotating block (32) is embedded in the notch (42). The rotating shaft (31) is fixed to the rotating block (32); the shaft hole consists of two symmetrically arranged mounting holes (43) that connect the notch (42) and two... The reset holes (44) are respectively connected to the corresponding mounting holes (43). The two mounting holes (43) are located between the two reset holes (44). The diameter of the mounting holes (43) is smaller than that of the reset holes (44). The two ends of the rotating shaft (31) are respectively rotatably set in the two mounting holes (43). The two torsion springs (41) are respectively sleeved and fixed at both ends of the rotating shaft (31) and respectively embedded in the two reset holes (44). The two ends of the torsion springs (41) abut against the inner wall of the corresponding mounting hole (43). The inner side wall of the notch (42) has a relief groove (45) for one end of the rotating block (32) to pass through.

4. The automated machining device for thread rolling of a vehicle rearview mirror rod according to claim 2, characterized in that, The top of the feed plate (12) has a guide groove (121) that matches the groove (21). The bottom wall of the groove (21) and the bottom wall of the guide groove (121) are both provided with arc grooves (122). Two symmetrically arranged reset springs (14) are fixed between the feed plate (12) and the working frame (1). The bottom wall of the groove (21) is provided with two guide slopes that are symmetrically arranged relative to the arc grooves (122).

5. An automated machining device for thread rolling of a vehicle rearview mirror stalk according to claim 4, characterized in that, Two symmetrically arranged support blocks (15) are fixed inside the working frame (1). The upper ends of the two support blocks (15) abut against the lower ends of the corresponding two racks (51). A slider (53) is fixed at one end of the connecting rod (52). A groove (23) for the slider (53) to be embedded is opened on the inner side wall of the through hole (22). One end of the groove (23) is an opening that penetrates the guide plate (2), forming a through-type design.

6. The automated machining device for thread rolling of a vehicle rearview mirror rod according to claim 1, characterized in that, It also includes a thread rolling machine (6) for processing rods and ejecting the processed rods, the thread rolling machine (6) being located on one side of the working frame (1); a feeding mechanism for conveying rods one by one into the groove (21); and a conveying mechanism installed in the working frame (1) for catching and transporting the rods ejected from the thread rolling machine (6) to the outside of the working frame (1).

7. An automated machining device for thread rolling of a vehicle rearview mirror stalk according to claim 1, characterized in that, The guide plate (2) is provided with two sets of mechanical avoidance mechanisms symmetrically arranged relative to the groove (21) at its end. The mechanical avoidance mechanisms include: A stop (8) is flexibly set at the top of the guide plate (2); A connecting groove (81) is provided on the guide plate (2) for the pusher block (3) in the avoidance state to pass through. The connecting groove (81) is located on one side of the stop block (8). A reset groove (82) is formed on the guide plate (2) and communicates with both the connecting groove (81) and the groove (21); When a set of push rod assemblies is reset, its push block (3) contacts and is blocked by the stop block (8), forcing the push block (3) to rotate around its guide block (4) and enter the connecting groove (81); the push block (3) moves along the connecting groove (81) and finally enters the reset groove (82), and is restored to the state aligned with the groove (21) under the action of the torsion spring of the one-way hinge structure, thus completing the reset.

8. An automated machining device for thread rolling of a vehicle rearview mirror stalk according to claim 7, characterized in that, The groove (21) is a V-shaped groove, the lower end of the pusher block (3) is a V-shaped plate that is adapted to the V-shaped groove, the top of the feed plate (12) is provided with a V-shaped limiting groove (83) that is adapted to the groove (21) and allows the lower end of the pusher block (3) to pass through, the stop block (8) is elastically set in the lifting groove (85) at the end of the guide plate (2) by a reset spring (84), the outer wall of the stop block (8) is fixed with symmetrically arranged lifting blocks (88) that are close to the lowest end of the guide slope (86), the vertical inner wall of the lifting groove (85) is provided with a vertical groove (851) for the lifting block (88) to be embedded, and the end of the stop block (8) close to the connecting groove (81) is fixed with an adjusting block (89) located outside the guide plate (2).

9. An automated machining device for thread rolling of a vehicle rearview mirror rod according to claim 8, characterized in that, The top of the stop block (8) is provided with a guide slope (86). The upper end of the push block (3) is divided into a rotating block (32) located outside the groove (21). The push block (3) is rotatably connected to the guide block (4) through the rotating block (32). The stop block (8) has a raised position and a pressed position in the lifting groove (85). When the rotating block (32) moves with the push rod assembly towards the lower material plate (12), it presses the stop block (8) to the pressed position along the guide slope (86). When the rotating block (32) is reset with the push rod assembly, the stop block (8) is in the raised position and one end abuts against the rotating block (32), forcing the push block (3) to rotate.

10. An automated machining device for thread rolling of a vehicle rearview mirror stalk according to claim 8, characterized in that, One end of the feed plate (12) is fixed with an extension plate (87). The extension plate (87) is located on one side of the V-shaped limiting groove (83), and its top surface has an extension groove that communicates with the V-shaped limiting groove (83).

Images