Workpiece sorting device based on product quality

Abstract

The utility model discloses a work piece sorting device based on product quality, the utility model discloses the use hydraulic mechanism and trigger switch replace weighing sensor, hydraulic mechanism has the coarse pipe and the fine tube of intercommunication, through the downward movement of first piston in coarse pipe, promote the second piston in fine tube and move upward, and second piston presses (impacts and presses) trigger switch, can start to promote subassembly, and push the qualified work piece, and lighter work piece can not start trigger switch, and be marked as defective product, the process of next work piece falling into the weighing plate, will push defective product work piece to send out conveyor, realize the effect of sorting, compared with traditional weighing sensor measures weight, not only need according to weighing sensor programming, and long -term frequent use is easy to appear damage error, and the cost of trigger switch is low, and the service life is long, and the accuracy is high (only switch two states) and the use convenience is high, can use in small -size factory promotion.

Description

Technical Field

[0001] This utility model relates to the field of workpiece sorting technology, and in particular to a workpiece sorting device based on product quality. Background Technology

[0002] Traditional sorting mainly relies on manual operation, which suffers from low efficiency, low accuracy, and susceptibility to human factors. Furthermore, workers are prone to fatigue from long hours of work, and the efficiency cannot meet the demands of modern production. Therefore, automated sorting systems are needed. Commercially available sorting systems, such as those used in express delivery, are generally based on machine vision for intelligent sorting. These systems mainly consist of three parts: image acquisition, information processing, and automatic sorting. They acquire three-dimensional spatial information of workpieces through 3D vision technology and combine it with deep learning algorithms to achieve accurate identification and sorting.

[0003] During the processing of castings, visual inspection can only detect surface defects. If bubbles or cavities appear inside, the strength of the workpiece will be reduced. Therefore, it is necessary to weigh the workpiece and reject the lighter workpiece.

[0004] However, in the weighing and inspection process, the weight is measured by a weighing sensor. But the mass (weight) of the casting is large. Long-term and frequent weighing and inspection can easily lead to the deviation of the weighing sensor, resulting in detection errors that fail to screen out defective products or screen out too many qualified products. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a workpiece sorting device based on product quality.

[0006] This utility model provides a workpiece sorting device based on product quality, comprising: The defective product conveyor has an output conveyor located at the outlet side of the defective product conveyor along the first direction. A weighing plate is provided between the defective product conveyor and the output conveyor, and the size of the weighing plate is matched with the size of the workpiece. The hydraulic mechanism includes a thick tube and a thin tube that are interconnected at their bottoms. A first piston is provided inside the thick tube, and the top of the first piston is connected to the bottom of the weighing plate via a connecting rod. A second piston is provided inside the thin tube, and a trigger switch is provided at the top of the thin tube. Hydraulic oil is filled between the first piston and the second piston. A pushing component is used to push the workpiece on the weighing plate to move along the second direction and detach it from the weighing plate. The trigger switch is electrically connected to the pushing component. The first direction and the second direction are perpendicular to each other.

[0007] According to the technical solution provided in the embodiments of this application, a frame is provided below the weighing plate, and a table is provided on the top of the frame. The top of the table is connected to the weighing plate through a plurality of spring mechanisms.

[0008] According to the technical solution provided in the embodiments of this application, the spring mechanism includes a support spring connecting the bottom end of the weighing plate and the top end of the table. The bottom end of the weighing plate is provided with an inner cylinder that is slidably fitted on the outside of the support spring, and the top end of the table is provided with an outer cylinder that is slidably fitted on the outside of the inner cylinder.

[0009] According to the technical solution provided in the embodiments of this application, the top end of the outer cylinder is provided with a first limiting ring, the inner surface of the first limiting ring is used to fit the outer surface of the inner cylinder, and the bottom end of the inner cylinder is provided with a second limiting ring, the outer surface of the second limiting ring fits the inner surface of the outer cylinder; When the bottom surface of the first limiting ring abuts against the top surface of the second limiting ring, the top surface of the weighing plate, the top surface of the defective conveyor, and the top surface of the delivery conveyor are flush.

[0010] According to the technical solution provided in the embodiments of this application, the number of spring mechanisms is four and the center lines of each mechanism form a rectangle, and the outer cylinder and the inner cylinder are provided with end plates at their far ends; The weighing plate bottom end and the table top end are each provided with two sets of fasteners. Each set of fasteners corresponds to one side line of a rectangle. Each set of fasteners includes a first limiting strip and a second limiting strip located on both sides of the end plate. The first limiting strip and the second limiting strip are close to each other and fit into the corresponding end plate. The first limiting strip, the second limiting strip and the end plate are detachably connected by threads.

[0011] According to the technical solution provided in the embodiments of this application, an installation channel is provided through the first limiting strip, the second limiting strip and the corresponding end plate. The installation channel includes a central through hole in the middle of the end plate, a side through hole on the first limiting strip and a side screw hole on the second limiting strip.

[0012] According to the technical solution provided in the embodiments of this application, the pushing component includes a mounting plate disposed on the table and located away from the weighing plate along a second direction. An electric telescopic rod is mounted on the top of the mounting plate. The extension direction of the electric telescopic rod is the second direction. A push plate is provided at the end of the electric telescopic rod away from the mounting plate along the second direction. The output end of the trigger switch is electrically connected to the input end of the electric telescopic rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a hydraulic mechanism and a trigger switch instead of a load cell. The hydraulic mechanism has a connecting thick and thin tube. The downward movement of the first piston in the thick tube pushes the upward movement of the second piston in the thin tube. The second piston presses (bumps) the trigger switch, which activates the pushing component to push qualified workpieces. Lighter workpieces cannot activate the trigger switch and are marked as defective. As the next workpiece falls onto the weighing plate, the defective workpiece is pushed onto the conveyor belt, achieving a sorting effect. Compared to traditional load cell weighing, which requires programming based on the load cell and is prone to damage and errors due to long-term and frequent use, the trigger switch is low in cost, long in service life, highly accurate (with only two states), and easy to use. It can be widely used in small factories, ensuring automated sorting while offering multiple advantages such as low cost, long service life, high accuracy (with only two states), and ease of use. Furthermore, the hydraulic mechanism converts the short-distance movement of the weighing plate into a long-distance movement, avoiding accidental activation of the trigger switch due to short-distance movement.

[0014] Based on this, a spring mechanism is provided, including an inner cylinder, an outer cylinder, a first limiting ring, and a second limiting ring. On the one hand, it effectively limits the top height of the weighing plate, facilitating the smooth transition of the workpiece. On the other hand, the inner and outer cylinders improve the stability of the support spring, preventing the support spring from bending in the middle. Furthermore, an end plate, a first limiting strip, and a second limiting strip are provided. Bolts pass through the three components, enabling the end plate to be detachably installed, facilitating quick replacement of the support spring and improving ease of use.

[0015] It should be understood that the description in this utility model description section is not intended to limit the key or essential features of the embodiments of this utility model, nor is it intended to restrict the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A schematic diagram of a workpiece sorting device based on product quality is provided for an embodiment of this application; Figure 2 This is a schematic diagram of the hydraulic mechanism in the embodiments of this application; Figure 3 This is a schematic diagram of the installation structure of the spring mechanism in the embodiments of this application. Figure 4 This is a schematic diagram of the mounting structure of the support spring in an embodiment of this application. Numbering on the map: 1. Defective product conveyor; 2. Outgoing conveyor; 3. Frame; 4. Table; 5. Weighing plate; 6. Spring mechanism; 61. Inner cylinder; 62. Outer cylinder; 63. Support spring; 64. First limiting ring; 65. Second limiting ring; 66. End plate; 67. Central through hole; 68. First limiting strip; 69. Side through hole; 610. Second limiting strip; 611. Side screw hole; 7. Hydraulic mechanism; 71. Connecting rod; 72. First piston; 73. Thick pipe; 74. Connecting pipe; 75. Thin pipe; 76. Second piston; 77. Trigger switch; 8. Pushing component; 81. Mounting plate; 82. Electric telescopic rod; 83. Push plate. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] Please refer to Figures 1-4 An embodiment of this utility model provides a workpiece sorting device based on product quality, comprising: The defective product conveyor 1 has an outgoing conveyor 2 located at the outlet side of the defective product conveyor 1 along the first direction. A weighing plate 5 is provided between the defective product conveyor 1 and the outgoing conveyor 2. The size of the weighing plate 5 is matched with the size of the workpiece. The hydraulic mechanism 7 includes a thick pipe 73 and a thin pipe 75 that are interconnected at their bottoms. The thick pipe 73 is equipped with a first piston 72, and the top of the first piston 72 is connected to the bottom of the weighing plate 5 via a connecting rod 71. The thin pipe 75 is equipped with a second piston 76, and the top of the thin pipe 75 is equipped with a trigger switch 77. Hydraulic oil is filled between the first piston 72 and the second piston 76. The bottoms of the thick pipe 73 and the thin pipe 75 are connected by a connecting pipe 74. The push assembly 8 is used to push the workpiece on the weighing plate 5 to move along the second direction and detach from the weighing plate 5. The trigger switch 77 is electrically connected to the push assembly 8. The first direction and the second direction are perpendicular to each other.

[0020] like Figure 1 and Figure 2As shown, when the first piston 72 moves downward, it squeezes the hydraulic oil inside the coarse pipe 73 into the thin pipe 75. Since the diameter of the coarse pipe 73 is larger than the diameter of the thin pipe 75, when the weighing plate 5 and the first piston 72 move downward a short distance, the hydraulic oil flows to the thin pipe 75, pushing the second piston 76 to move a long distance in the thin pipe 75. The second piston 76 presses (bumps) the trigger switch 77, which can start the pushing component 8 to push the qualified workpiece, while the lighter workpiece cannot start the trigger switch 77 and is marked as a defective product. During the process of the next workpiece falling into the weighing plate 5, the defective workpiece will be pushed onto the delivery conveyor 2 to achieve the sorting effect.

[0021] Traditional weighing methods using load cells require programming the load cells and setting thresholds to determine if the weight is too light. This approach is costly and has a high barrier to entry for use, as well as maintenance. Furthermore, frequent and prolonged use can easily lead to damage and errors. In contrast, the trigger switch 77 is low-cost, has a long lifespan, high accuracy (with only two states, on and off), and is very easy to use. Ultimately, this application not only guarantees the basic functions of automated sorting, but is also easy to use and maintain, and reduces the procurement, usage, and maintenance costs of small-scale projects, making it suitable for widespread use in small factories. Furthermore, the hydraulic mechanism 7 converts the short-distance movement of the weighing plate 5 into a long-distance movement, avoiding accidental activation of the trigger switch 77 due to short-distance movement, thus ensuring the accuracy of the detection. Optionally, the thin tube 75 is a transparent tube with weight scale lines on its outer surface. By observing the weight scale lines corresponding to the second piston 76, the approximate weight range of the defective products can be determined, facilitating subsequent process improvements.

[0022] In some embodiments, a frame 3 is provided below the weighing plate 5, and a table 4 is provided on top of the frame 3. The top of the table 4 is connected to the weighing plate 5 by a plurality of spring mechanisms 6. Figure 1 , Figure 2 and Figure 3 As shown, the weighing plate 5 is supported by the spring mechanism 6. When the workpiece falls onto the weighing plate 5, the weighing plate 5 moves down and drives the spring mechanism 6 to contract. Without the spring mechanism 6, the weighing plate 5 may not return to its original position after driving the first piston 72 downward, thus maintaining a relatively stable and continuous measurement effect.

[0023] In some embodiments, the spring mechanism 6 includes a support spring 63 connecting the bottom end of the weighing plate 5 and the top end of the table 4. The bottom end of the weighing plate 5 is provided with an inner cylinder 61 that is slidably fitted on the outside of the support spring 63, and the top end of the table 4 is provided with an outer cylinder 62 that is slidably fitted on the outside of the inner cylinder 61.

[0024] like Figure 3 and Figure 4As shown, by the reciprocating movement of the inner cylinder 61 inside the outer cylinder 62, the movement stability of the weighing plate 5 is limited, preventing the weighing plate 5 from tilting when moving up and down. In addition, the cooperation between the inner cylinder 61 and the outer cylinder 62 can improve the stability of the support spring 63 during the contraction and extension process, preventing the support spring 63 from bending in the middle.

[0025] In some embodiments, the top end of the outer cylinder 62 is provided with a first limiting ring 64, the inner surface of the first limiting ring 64 is used to fit the outer surface of the inner cylinder 61, and the bottom end of the inner cylinder 61 is provided with a second limiting ring 65, the outer surface of the second limiting ring 65 is fitted with the inner surface of the outer cylinder 62. like Figure 3 and Figure 4 As shown, when the bottom surface of the first limiting ring 64 abuts against the top surface of the second limiting ring 65, the top surface of the weighing plate 5, the top surface of the defective conveyor 1, and the top surface of the delivery conveyor 2 are flush.

[0026] refer to Figure 4 When the supporting spring 63 is working, it is in a contracted state. Its elastic stress pushes the weighing plate 5 upward. The bottom surface of the first limiting ring 64 abuts against the top surface of the second limiting ring 65, so that the top surface of the weighing plate 5, the top surface of the defective conveyor 1 and the top surface of the delivery conveyor 2 are flush. This ensures that the workpiece on the defective conveyor 1 can fall stably onto the weighing plate 5. Optionally, the top surface of the weighing plate 5 is a smooth surface, which makes it easy for the workpiece to slide to the delivery conveyor 2 and then be delivered out by the delivery conveyor 2.

[0027] In some embodiments, the number of spring mechanisms 6 is four and the center lines of each form a rectangle, and the outer cylinder 62 and the inner cylinder 61 are provided with end plates 66 at their far ends. like Figure 2 , Figure 3 and Figure 4 As shown, the bottom of the weighing plate 5 and the top of the table 4 are each provided with two sets of fasteners. Each set of fasteners corresponds to one side line of the rectangle. Each set of fasteners includes a first limiting strip 68 and a second limiting strip 610 located on both sides of the end plate 66. The surfaces of the first limiting strip 68 and the second limiting strip 610 close to each other fit with the corresponding end plate 66. The first limiting strip 68, the second limiting strip 610 and the end plate 66 are detachably connected by threads.

[0028] like Figures 1-4As shown, the spring mechanism 6 first needs to be placed on the table. Since the two sets of fixing members on the top surface of the tabletop 4 correspond to two spring mechanisms 6 respectively, the end plates 66 of the two spring mechanisms 6 can be placed between one set of fixing members, and the end plates 66 of the other two spring mechanisms 6 can be placed between the other set of fixing members, that is, the end plates 66 are placed between the first limiting strip 68 and the second limiting strip 610. Then, the weighing plate 5 is placed on top of each spring mechanism 6, so that the first limiting strip 68 and the second limiting strip 610 can lock the corresponding end plates 66. Finally, the assembly is completed using threads. Disassembly only requires removing the corresponding bolts. This assembly method allows for quick installation and disassembly of the spring mechanism 6 and the weighing plate 5, improving the convenience of replacing the support spring 63. Additionally, the extension direction of each set of fixing members in the figure is front-to-back; optionally, the extension direction of each set of fixing members can also be left-to-right, as long as it can lock the end plates 66.

[0029] In some embodiments, an installation channel is provided through the first limiting strip 68, the second limiting strip 610 and the corresponding end plate 66. The installation channel includes a central through hole 67 in the middle of the end plate 66, a side through hole 69 on the first limiting strip 68, and a side screw hole 611 on the second limiting strip 610.

[0030] like Figures 2-4 As shown, by threading bolts through the side through hole 69, the middle through hole 67, and the side screw hole 611, a detachable threaded connection can be achieved between the first limiting strip 68, the second limiting strip 610, and the corresponding end plate 66. Preferably, the end face of the first limiting strip 68 near the end plate 66 is provided with a rubber ring on the outer surface of the corresponding side through hole 69, and the end face of the second limiting strip 610 near the end plate 66 is provided with a rubber ring on the outer surface of the corresponding side screw hole 611. The two ends of the middle through hole 67 are chamfered. By deforming the rubber ring and inserting it into the chamfer, further positioning can be achieved, which facilitates the quick installation of bolts and improves the convenience of positioning and installation.

[0031] In some embodiments, the pushing component 8 includes a mounting plate 81 disposed on the table 4 and located away from the weighing plate 5 in a second direction. An electric telescopic rod 82 is mounted on the top of the mounting plate 81. The extension direction of the electric telescopic rod 82 is the second direction. A push plate 83 is provided at the end of the electric telescopic rod 82 away from the mounting plate 81 in the second direction. The output end of the trigger switch 77 is electrically connected to the input end of the electric telescopic rod 82.

[0032] like Figure 1 and Figure 2 As shown, when the trigger switch 77 is pressed, the internal circuit is closed and the circuit is connected. The electric telescopic rod 82 is energized and starts. The electric telescopic rod 82 drives the push plate 83 to move forward, pushing the qualified workpiece out from the front end and into the qualified product conveyor or transfer car for subsequent processing steps.

[0033] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0034] In the description of this specification, the terms "one embodiment," "some embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A workpiece sorting device based on product quality, characterized in that, include The defective product conveyor (1) is provided with an outgoing conveyor (2) located on the outlet side of the defective product conveyor (1) along the first direction. A weighing plate (5) is provided between the defective product conveyor (1) and the outgoing conveyor (2). The size of the weighing plate (5) matches the size of the workpiece. The hydraulic mechanism (7) includes a thick pipe (73) and a thin pipe (75) that are interconnected at the bottom. The thick pipe (73) is equipped with a first piston (72), and the top of the first piston (72) is connected to the bottom of the weighing plate (5) through a connecting rod (71). The thin pipe (75) is equipped with a second piston (76), and the top of the thin pipe (75) is equipped with a trigger switch (77). Hydraulic oil is filled between the first piston (72) and the second piston (76). A push assembly (8) is used to push the workpiece on the weighing plate (5) to move along the second direction and detach from the weighing plate (5). The trigger switch (77) is electrically connected to the push assembly (8). The first direction and the second direction are perpendicular to each other.

2. The workpiece sorting device based on product quality according to claim 1, characterized in that, The weighing plate (5) is provided with a frame (3) below it, and the frame (3) has a table (4) on top. The top of the table (4) is connected to the weighing plate (5) by several spring mechanisms (6).

3. The workpiece sorting device based on product quality according to claim 2, characterized in that, The spring mechanism (6) includes a support spring (63) connecting the bottom end of the weighing plate (5) and the top end of the table (4). The bottom end of the weighing plate (5) is provided with an inner cylinder (61) that is slidably fitted on the outside of the support spring (63), and the top end of the table (4) is provided with an outer cylinder (62) that is slidably fitted on the outside of the inner cylinder (61).

4. The workpiece sorting device based on product quality according to claim 3, characterized in that, The top of the outer cylinder (62) is provided with a first limiting ring (64), the inner surface of the first limiting ring (64) is used to fit the outer surface of the inner cylinder (61), and the bottom of the inner cylinder (61) is provided with a second limiting ring (65), the outer surface of the second limiting ring (65) fits the inner surface of the outer cylinder (62); When the bottom surface of the first limiting ring (64) abuts against the top surface of the second limiting ring (65), the top surface of the weighing plate (5), the top surface of the defective conveyor (1), and the top surface of the delivery conveyor (2) are flush.

5. A workpiece sorting device based on product quality according to claim 4, characterized in that, The spring mechanism (6) consists of four springs, and the center lines of each spring form a rectangle. The outer cylinder (62) and the inner cylinder (61) are provided with end plates (66) at their far ends. The weighing plate (5) at the bottom and the tabletop (4) at the top are provided with two sets of fasteners. Each set of fasteners corresponds to one side line of a rectangle. Each set of fasteners includes a first limiting strip (68) and a second limiting strip (610) located on both sides of the end plate (66). The first limiting strip (68) and the second limiting strip (610) are close to each other and fit with the corresponding end plate (66). The first limiting strip (68), the second limiting strip (610) and the end plate (66) are detachably connected by threads.

6. A workpiece sorting device based on product quality according to claim 5, characterized in that, An installation channel is provided between the first limiting strip (68), the second limiting strip (610) and the corresponding end plate (66). The installation channel includes a central through hole in the middle of the end plate (66), a side through hole (69) on the first limiting strip (68), and a side screw hole (611) on the second limiting strip (610).

7. A workpiece sorting device based on product quality according to claim 1, characterized in that, The pushing component (8) includes a mounting plate (81) disposed on the table (4) and located away from the weighing plate (5) along a second direction. An electric telescopic rod (82) is mounted on the top of the mounting plate (81). The extension direction of the electric telescopic rod (82) is the second direction. A push plate (83) is provided at the end of the electric telescopic rod (82) away from the mounting plate (81) along the second direction. The output end of the trigger switch (77) is electrically connected to the input end of the electric telescopic rod (82).

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