A stamping and trimming device for a plastic housing of an automobile rearview mirror

Abstract

This invention relates to a stamping and trimming device for plastic housings of automotive rearview mirrors, comprising a worktable, a conveying mechanism, a fixed bracket, a turntable, a connecting column, a movable plate, a cutting tool, and a toggle block. Under the action of the turntable, the cutting tool synchronously cuts the plastic housing on the worktable in both horizontal and vertical directions. When the cutting tool detaches from the plastic housing, the toggle block presses against the toggle position. This application integrates the entire process of conveying, positioning, cutting, unloading, and resetting. Specifically, a single motor drives the turntable, synchronously completing the cutting motion, pressure plate clamping and release, and toggle block triggering. During the tool lifting phase after cutting, the toggle block presses against the trimmed plastic housing under the action of a first compression spring. Simultaneously, the connecting column below triggers a switching rod, releasing the pressure plate from the workpiece and causing the plastic housing to move. Subsequently, the telescopic component retracts, causing the pressure plate to reset and conveying the next plastic housing.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, specifically to a stamping and trimming device for plastic housings of automotive rearview mirrors. Background Technology

[0002] During the production of automotive rearview mirror plastic housings, excess edges are typically removed through stamping or trimming to ensure dimensional accuracy and assembly compatibility. Currently, most trimming devices on the market use independent units for conveying, cutting, and material collection, lacking efficient coordination and integration between processes. For example, some devices require manual labor or a dedicated robotic arm to position the workpiece at the cutting station before cutting, and additional equipment or manual labor is needed to remove and move the workpiece after cutting. This results in poor workflow coordination, mismatched cycle times, low positioning repeatability, and large equipment footprint.

[0003] Especially for lightweight and easily deformable workpieces such as small and medium-sized plastic shells, the traditional step-by-step processing mode can easily cause the workpiece to shift position, get scratched or deformed during multiple transfers, affecting the finished product qualification rate.

[0004] Therefore, a stamping and trimming device for plastic housings of automotive rearview mirrors is proposed to address the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a stamping and trimming device for plastic housings of automotive rearview mirrors.

[0006] The objective of this invention is achieved through the following technical solution: a stamping and trimming device for plastic housing of automotive rearview mirror, comprising: a worktable and a conveying mechanism for conveying plastic housing in the middle of the worktable, characterized in that: a fixed bracket is fixedly connected to the worktable, and two rotating disks are rotatably connected to the fixed bracket, with connecting columns fixedly connected to the edges of the rotating disks; It also includes a movable plate and a cutting blade fixed on the movable plate. The top of the movable plate is rotatably connected to the connecting column located above, and the connecting column located below is slidably connected to the movable plate through a sliding plate. A toggle block is connected to the bottom of the sliding plate through an elastic element. Under the action of the turntable, the cutting tool cuts the plastic shell on the worktable simultaneously in the horizontal and vertical directions, and when the cutting tool is separated from the plastic shell, it is pressed against the actuating position by the actuating block.

[0007] As a further description of the above technical solution: The movable plate has a sliding groove for the slide plate to slide, and a motor is fixedly connected to the fixed bracket. The output shaft of the motor is connected and fixed to the central shaft of one of the turntables; this ensures precise guidance of the cutting motion and a stable power source. The structure is simple, reliable, and easy to control.

[0008] As a further description of the above technical solution: The elastic element includes a connecting block that is fixedly connected to the slide plate, and two insert rods that pass through the connecting block are fixedly connected to the actuating block. A first compression spring is connected between the actuating block and the connecting block. This allows the workpiece to be automatically and elastically pressed when the tool is withdrawn, thereby moving the plastic shell to move away and enter the next process.

[0009] As a further description of the above technical solution: The connecting post located below is rotatably connected to the sliding plate. The connecting post has a circular groove that slides with the insert rod to increase stability.

[0010] As a further description of the above technical solution: Two sets of limiting plates are fixedly connected to the workbench above the conveying mechanism, with a gap between the ends of the two sets of limiting plates. The two sets of limiting plates and the gap between them are used to guide and initially position the plastic shell in the conveying process, creating conditions for subsequent precise clamping and cutting, and improving the feeding accuracy.

[0011] As a further description of the above technical solution: The workbench is equipped with two telescopic components that are arranged opposite to each other. The telescopic ends of the two components are respectively fixedly connected to abutments. The two abutments correspond to the gap positions and clamp the sides of the plastic shell. With the help of the gap of the limiting plate, the plastic shell can be quickly and accurately fixed laterally, which enhances the stability during cutting.

[0012] As a further description of the above technical solution: One of the abutments has a U-shaped structure with inclined ends, which allows it to automatically guide and correct the position of the plastic shell during clamping, further improving positioning accuracy and adaptability.

[0013] A method for using a stamping and trimming device for a plastic housing of a car rearview mirror, the specific method of which includes the following steps; S1. The plastic shell is fixed by the conveyor telescopic component and the backing plate, and the plastic shell is put into the worktable and located below the cutting tool. S2. Start the motor to keep the cutting tool in a vertical position, and synchronize the horizontal and vertical reciprocating motions so that the cutting tool returns to its original position after the cutting is completed. As the cutting blade detaches from the plastic shell, the abutment retracts onto the conveying mechanism, and the pressing block presses against the plastic shell, driving it to move to one side for collection. S3. The backplate on the conveyor returns to clamp another plastic shell, and the next plastic shell is then trimmed.

[0014] Compared with the prior art, the advantages of the present invention are as follows: This application integrates the entire process of conveying, positioning, cutting, unloading, and resetting. A single motor drives the turntable, simultaneously completing the cutting motion, pressure plate clamping and release, and triggering of the actuating block. After cutting, during the tool lifting phase, the actuating block, under the action of the first compression spring, presses against the cut plastic shell. Simultaneously, the connecting column below triggers the switching rod, releasing the pressure plate from the workpiece and causing the plastic shell to move. Subsequently, the telescopic component retracts, resetting the pressure plate and conveying the next plastic shell. The entire process is automatically connected without manual intervention, achieving continuous and efficient automated production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a rear view schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the cooperative structure of the workbench, conveying mechanism, and fixed support in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the cooperative structure of the turntable, the movable plate, and the cutting tool in Embodiment 1 of the present invention; Figure 5 It is in Embodiment 1 of the present invention Figure 5 Structural side view diagram; Figure 6 This is a schematic diagram of the disassembled structure of the connecting column and the movable plate of the present invention; Figure 7 This is a schematic diagram of the elastic element structure of the present invention; Figure 8 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the connection structure between the fixing plate and the fixing bracket in Embodiment 2 of the present invention; Figure 10 This is in Embodiment 2 of the present invention Figure 9 Top view of the structure; Figure 11 This is a schematic diagram of the cooperation structure between the fixing plate and the limiting post in Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the disassembled structure of the turntable and the movable plate in Embodiment 2 of the present invention; Figure 13 This is a schematic diagram of the cooperation structure between the fixing plate and the switching rod in Embodiment 2 of the present invention; Figure 14 This is a schematic diagram of the structure in Embodiment 2 of the present invention, showing the mutual separation between the limiting post and the pressure plate; Figure 15 This is a schematic diagram of the disassembled structure of the limiting post and the arc-shaped groove in Embodiment 2 of the present invention.

[0016] Labeling Explanation: 1. Workbench; 2. Conveying Mechanism; 3. Fixed Bracket; 4. Turntable; 5. Connecting Column; 6. Movable Plate; 7. Cutting Tool; 8. Slide Plate; 9. Actuating Block; 10. Sliding Groove; 11. Motor; 12. Connecting Block; 13. Inserting Rod; 14. First Compression Spring; 15. Circular Groove; 16. Limiting Plate; 17. Gap; 18. Telescopic Component; 19. Support Plate; 20. Fixed Plate; 21. Pressure Plate; 2101. L-shaped Plate; 2102. Connecting Plate; 22. Switching Rod; 23. Limiting Column; 24. Arc-shaped Groove; 25. Second Compression Spring. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments: Example

[0018] like Figures 1-7 The figure shows a schematic diagram of an embodiment of a plastic shell stamping and trimming device for a car rearview mirror provided by the present invention, including: a workbench 1 and a conveying mechanism 2 for conveying the plastic shell in the middle of the workbench 1. A fixed bracket 3 is fixedly connected to the workbench 1, and two turntables 4 that rotate and cooperate with each other are rotatably connected to the fixed bracket 3. The turntables 4 are preferably gears, that is, the stable meshing of the two gears ensures the stability of the mutual rotation and cooperation. A connecting column 5 is fixedly connected to the edge of the turntable 4. It also includes a movable plate 6 and a cutting tool 7 fixed on the movable plate 6. The worktable 1 is provided with a through groove. When the cutting tool 7 cuts the plastic shell, the cutting tool 7 enters the through groove. The bottom of the worktable 1 is provided with a mechanism for collecting cutting dust (this is a conventional technology and is not shown). The top of the movable plate 6 is rotatably connected to the upper connecting column 5. The lower connecting column 5 is slidably connected to the movable plate 6 through a sliding plate 8. A toggle block 9 is connected to the bottom of the sliding plate 8 through an elastic element. The movable plate 6 has a sliding groove 10 for the sliding plate 8 to slide. A motor 11 is fixedly connected to the fixed bracket 3. The output shaft of the motor 11 is connected and fixed to the central shaft of one of the turntables 4. The motor 11 provides power to drive one turntable 4 to rotate, and the other turntable 4 meshes and rotates accordingly. The sliding groove 10 on the movable plate 6 constrains the movement direction of the sliding plate 8, thereby enabling the reciprocating motion required by the cutting tool 7.

[0019] The elastic element includes a connecting block 12 that is fixedly connected to the slide plate 8. Two insert rods 13 that pass through the connecting block 12 are fixedly connected to the actuating block 9. A first compression spring 14 is connected between the actuating block 9 and the connecting block 12 to provide elastic pressure to the actuating block 9, so that it can flexibly press against or detach from the workpiece surface to achieve buffering and clamping functions.

[0020] The connecting post 5 located below is rotatably connected to the sliding plate 8. A circular groove 15 is provided on the connecting post 5 to slide with the insertion rod 13. During the movement, the insertion rod 13 slides along the circular groove 15 to further limit its position.

[0021] Two sets of limiting plates 16 are fixedly connected to the workbench 1 above the conveying mechanism 2. A gap 17 is left between the ends of the two sets of limiting plates 16. The limiting plates 16 do not contact the conveyor belt of the conveying mechanism 2. The top surface of the conveyor belt of the conveying mechanism 2 is flush with the top surface of the workbench 1, which facilitates the movement of the plastic shell between the conveyor belt of the conveying mechanism 2 and the workbench 1. During the conveying process, the plastic shell is constrained on both sides by the limiting plates 16, thereby maintaining a straight-line traveling posture and being accurately guided to the position of the gap 17 between the ends of the two sets of limiting plates 16, thus completing the initial positioning.

[0022] The workbench 1 is provided with two telescopic components 18 distributed opposite to each other. The telescopic ends of the two telescopic components 18 are respectively fixedly connected to the abutment plates 19. The two abutment plates 19 correspond to the gap 17. The two abutment plates 19 clamp the side of the plastic shell. One of the abutment plates 19 has a U-shaped structure. When the plastic shell is conveyed to the gap 17, the two abutment plates 19 extend and clamp the side of the plastic shell from both sides, and fix it firmly at the predetermined cutting position of the workbench 1. Example

[0023] like Figures 8-15 This second embodiment is a further supplement and explanation of the first embodiment. A fixed plate 20 is fixedly connected to the fixed bracket 3. A pressure plate 21 that presses against the top of the plastic shell is rotatably connected to the fixed plate 20. A switching rod 22 is rotatably connected to the fixed plate 20. The connecting post 5 located below first contacts the pressure plate 21. The pressure plate 21 presses against the plastic shell through the switching component. The connecting post 5 located below then contacts the switching rod 22, causing the pressure plate 21 to detach from the plastic shell, making it easier for the toggle block 9 to move the plastic shell. Before the cutting tool 7 begins to cut into the workpiece, the connecting column 5 driven by the lower turntable 4 first contacts the connecting plate 2102. The thrust of the connecting column 5 acts on the pressure plate 21, and through the constraint and guidance of the switching component, the connecting plate 2102 rotates downward around its axis, thereby pressing against the top surface of the plastic shell at a certain angle. When the cutting is completed and the cutting tool 7 begins to retract, the connecting post 5 continues its movement trajectory and then contacts the switching rod 22. The connecting post 5 pushes the switching rod 22 to rotate. The movement of the switching rod 22 changes the force or constraint state on the pressure plate 21 through the switching element, forcing the pressure plate 21 to overcome the force of the second compression spring 25 and rotate in the opposite direction around the axis, thereby lifting it away from the top surface of the plastic shell. The switching component includes two limiting posts 23. One limiting post 23 is connected and fixed to the fixing plate 20. The fixing plate 20 has an arc-shaped groove 24. The other limiting post 23, which is connected and fixed to the switching rod 22, slides in the arc-shaped groove 24. The switching rod 22 is rotatably connected to the fixing plate 20 through a torsion spring rod. A second compression spring 25 is hung between the pressure plate 21 and the fixing plate 20.

[0024] When the connecting post 5 located below first contacts and pushes the connecting plate 2102, the pressure plate 21 rotates downward against the tension of the second compression spring 25 until its L-shaped plate 2101 presses the workpiece. At this time, the limiting post 23 fixed to the switching rod 22 slides to one end in the arc groove 24. In this position, the switching part locks the pressing state of the pressure plate 21 through the limiting action of the limiting post 23 at the end of the arc groove 24 and the continuous tension of the second compression spring 25, so that it remains stably pressed during the cutting process.

[0025] As the connecting post 5 continues to move, it subsequently contacts and pushes the switching rod 22. The switching rod 22 rotates around the torsion spring rod under force, causing the limiting post 23 on it to slide along the arc-shaped groove 24 on the fixed plate 20. When the limiting post 23 slides past a specific critical position (such as an inflection point or the end) of the arc-shaped groove 24, it drives the switching rod 22 to rotate rapidly, instantly releasing the locking constraint on the pressure plate 21. At this time, under the strong pull of the second compression spring 25, the pressure plate 21 quickly rotates upward and lifts, separating from the workpiece, completing the release.

[0026] The pressure plate 21 is composed of an L-shaped plate 2101 and a connecting plate 2102. The connecting plate 2102 and the L-shaped plate 2101 are staggered. The connecting rod and the connecting column 5 are pressed together. The L-shaped plate 2101 presses against the plastic shell.

[0027] The bottom of the connecting plate 2102 is provided with an inclined surface (the switching rod 22 is synchronously provided with an inclined surface facing the top, similar to the inclined surface of the connecting plate 2102, but the inclined surface of the switching rod 22 is not shown in the figure). The connecting post 5 located below is a telescopic rod with an internal spring. The telescopic end of the telescopic rod is pressed against the inclined surface. The telescopic rod drives the connecting plate 2102 and the switching rod 22 to rotate, and the telescopic rod can automatically disengage from the connecting plate 2102 and the switching plate (the telescopic rod automatically moves across the connecting plate 2102 and the switching plate during telescopic movement).

[0028] Working principle: First, the conveying mechanism 2 conveys the plastic shell of the car rearview mirror. Under the restriction of the limiting plate 16, the plastic shell is kept in a fixed position (slidingly engaged with the two limiting plates 16 on both sides) and conveyed into the gap 17. The conveying mechanism 2 stops intermittently. Then, the telescopic member 18 (electric telescopic member 18) drives the abutment plate 19 to move, so that the abutment plate 19 presses against the plastic shell, so that the plastic shell enters below the cutting tool 7 and contacts another abutment plate 19 with a U-shaped structure. Under the action of the two abutment plates 19 (cooperating with the U-shaped abutment plate 19), the position of the plastic shell is automatically corrected, and after correction, the plastic shell is fixed under the pressing action of the abutment plate 19 on the side of the plastic shell. Finally, start motor 11. Motor 11 drives the upper turntable 4 to rotate clockwise once, and the corresponding lower turntable 4 to rotate counterclockwise. The upper connecting column 5 first descends 1 / 4 turn, then rises 1 / 2 turn, and finally descends 1 / 4 turn. The corresponding lower connecting column 5 first rises 1 / 4 turn, then descends 1 / 2 turn, and finally rises 1 / 4 turn, which is the initial position. The connecting columns 5 are all located at the 3 o'clock position. The bottom of the cutting tool 7 is close to the plastic shell. The specific operating trajectory steps of the cutting tool 7, the toggle block 9, and the switch are as follows: S1, the movable plate 6 and the cutting blade 7 first descend and cut into the plastic shell (while moving to the left, the cutting blade 7 gradually penetrates deeper into the through groove), and the sliding plate 8 and the toggle block 9 move upward. The toggle block 9 will not contact the plastic shell, while the connecting column 5 located below acts on the connecting plate 2102. Under the action of the switching component, the pressure plate 21 tilts and presses against the plastic shell. Under the action of the second compression spring 25, the tilted state of the pressure plate 21 is maintained, thereby pressing against the top surface of the plastic shell. Together with the abutment plate 19 (fixing the side of the plastic shell), a stable fixed clamp is formed on the plastic shell, which is convenient for cutting. The abutment plate 19 and the pressure plate 21 do not affect the cutting of the cutting blade 7. S2, the movable plate 6 and the cutting blade 7 maintain the upward movement of the cutting state (while moving to the left, and the cutting blade 7 slowly disengages from the through groove), the slide plate 8 and the toggle block 9 move downward, the toggle block 9 gradually contacts the plastic shell, and the first compression spring 14 gradually compresses; S3. The cutting blade 7 moves upward away from the plastic shell (while moving to the right), the sliding plate 8 moves downward (while moving to the right), and the first compression spring 14 acts to make the actuating block 9 press against the top surface of the cut plastic shell, thereby preventing the plastic shell from moving upward when the cutting blade 7 is disengaged. The connecting post 5 located at the bottom contacts the switching rod 22, causing the switching rod 22 to rotate, thereby causing the limiting post 23 to move along the arc groove 24, causing the connecting plate 2102 to tilt and move, thereby causing the pressure plate 21 to rotate and move away from the plastic shell. It is worth noting that when the switching component is not installed, the function of the toggle block 9 is to move the cut plastic shell away from the worktable 1, and the cut plastic shell does not enter the conveying mechanism 2. When the cutting tool 7 is lifted away from the cut plastic shell, it stabilizes the plastic shell to prevent it from falling off the worktable 1, and the cut plastic shell re-enters the conveying mechanism 2. S4. Finally, the cutting tool 7 moves downward back to its initial position (and moves to the right at the same time). At this time, the cutting tool 7 and the pressing block are both away from the cut plastic shell. Through the telescopic part 18, the plastic shell is driven into the conveying mechanism 2. Both pressing plates 19 are away from the plastic shell. The cut plastic shell is conveyed to the next process through the conveying mechanism 2.

Claims

1. A stamping and trimming device for a plastic housing of a car rearview mirror, comprising: The workbench (1) and the conveying mechanism (2) for conveying plastic shells in the middle of the workbench (1) are characterized in that: a fixed bracket (3) is fixedly connected to the workbench (1), and two turntables (4) that rotate and cooperate with each other are rotatably connected to the fixed bracket (3), and a connecting column (5) is fixedly connected to the edge of the turntable (4). It also includes a movable plate (6) and a cutting blade (7) fixed on the movable plate (6). The top of the movable plate (6) is rotatably connected to the upper connecting column (5), and the lower connecting column (5) is slidably connected to the movable plate (6) via a sliding plate (8). A toggle block (9) is connected to the bottom of the sliding plate (8) via an elastic element. The cutting tool (7) cuts the plastic shell on the worktable (1) in both horizontal and vertical directions under the action of the turntable (4), and when the cutting tool (7) leaves the plastic shell, it presses against the actuating position by the actuating block (9).

2. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 1, characterized in that: The movable plate (6) has a sliding groove (10) for sliding the slide plate (8), and a motor (11) is fixedly connected to the fixed bracket (3). The output shaft of the motor (11) is connected and fixed to the central shaft of one of the turntables (4).

3. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 2, characterized in that: The elastic element includes a connecting block (12) that is fixedly connected to the slide plate (8), and two insert rods (13) that pass through the connecting block (12) are fixedly connected to the actuating block (9). A first compression spring (14) is connected between the actuating block (9) and the connecting block (12).

4. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 3, characterized in that: The connecting post (5) located below is rotatably connected to the sliding plate (8), and the connecting post (5) has a circular groove (15) that slides with the insert rod (13).

5. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 4, characterized in that: Two sets of limiting plates (16) located above the conveying mechanism (2) are fixedly connected to the workbench (1), and a gap (17) is left between the ends of the two sets of limiting plates (16).

6. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 5, characterized in that: The workbench (1) is provided with two telescopic components (18) that are distributed opposite to each other. The telescopic ends of the two telescopic components (18) are respectively fixedly connected to the abutment plate (19). The two abutment plates (19) correspond to the gap (17) and clamp the side of the plastic shell.

7. The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 6, characterized in that: One of the abutments (19) has a U-shaped structure with both ends of the U-shaped structure being inclined.

8. A method of using a stamping and trimming device for a plastic housing of a car rearview mirror, characterized in that, The stamping and trimming device for a plastic housing of a car rearview mirror according to claim 7 includes the following steps; S1. The plastic shell is fixed by the conveyor telescopic component (18) in conjunction with the abutment plate (19), and the plastic shell is put into the worktable (1) and located below the cutting tool (7); S2. Start the motor (11) to keep the cutting tool (7) in a vertical position, and synchronize the horizontal reciprocating motion with the vertical reciprocating motion so that the cutting tool (7) will reset after the cutting is completed. As the cutting blade (7) disengages from the plastic shell, the abutment plate (19) retracts onto the conveying mechanism (2), while the pressing block presses against the plastic shell, causing the plastic shell to move to one side for collection. S3. The backplate (19) on the conveying mechanism (2) re-clamps another plastic shell and performs the edge cutting process on the next plastic shell.

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