Metal part machining device

Abstract

The utility model discloses a metal piece processing device which comprises a conveying assembly and a detection assembly, a plurality of supporting points used for bearing and conveying metal pieces are formed on the conveying assembly, the supporting points are located on the same datum plane, and the detection assembly comprises a first detector. The first detector is movably arranged on the conveying assembly and is a contact type detector, the first detector is provided with a first critical position at least partially higher than the datum plane, and the first detector can move to the position below the datum plane under pressing of the metal piece and can reset to the first critical position when not pressed by the metal piece. According to the device, the reliability of metal piece detection can be remarkably improved, the service life of each part in the conveying assembly is prolonged, and the improvement of the copper bar processing efficiency and the smooth operation of the conveying process are realized.

Description

Technical Field

[0001] This utility model relates to the field of metal cutting technology, specifically to a metal processing device. Background Technology

[0002] Copper busbars, generally referring to copper busbars, copper current busbars, or grounding copper busbars, are a conductor material made from high-quality electrolytic copper through precision processing. Due to their low resistivity, high bendability, high mechanical strength, and excellent electrical and thermal conductivity, copper busbars play a crucial role in circuits for transmitting current and connecting electrical equipment. Before leaving the factory, copper busbars need to be processed into copper busbar rods of a certain length for easy transportation. Copper busbar processing mainly involves cutting the copper busbars into different lengths according to requirements, and then further processing the cut copper busbars for use.

[0003] The copper busbar processing apparatus in related technologies includes a conveying station and a cutting station located downstream of the conveying station. The conveying station includes a base, multiple conveying rollers mounted on the base, and an induction roller (acting similarly to a detector) positioned between two of the conveying rollers. To ensure accurate signal transmission, the induction roller is slightly higher than the conveying rollers so that the copper busbar maintains contact with the induction roller during conveying. However, due to the support of the induction roller, it is easy for the conveying roller on one side of the induction roller to fail to contact the copper busbar, while the conveying roller on the other side bears excessive pressure. This situation leads to two problems: first, the reduced contact area between the conveying roller and the copper busbar may result in poor copper busbar conveying; second, some conveying rollers wear out faster due to excessive pressure, requiring frequent replacement. These problems not only reduce the production efficiency of copper busbars but also increase production costs.

[0004] Copper busbar processing equipment in related technologies also employs non-contact detection methods, such as using an infrared detector to emit infrared light from bottom to top and using the feedback signal to determine whether the copper busbar is in position. However, the complex environment of copper busbar processing workshops, with dust and copper shavings present, easily adheres to the surface of the infrared detector, affecting the reliability of the detection. Furthermore, the numerous electromagnetic devices in the workshop may interfere with the non-contact detection device, further leading to inaccurate detection results and impacting the stability and efficiency of the production process. Utility Model Content

[0005] To address the shortcomings of the existing technology, this invention proposes a metal parts processing device. This device can significantly improve the reliability of metal parts inspection, extend the service life of each component in the conveying assembly, and effectively solve the problem of frequent replacement due to component wear in traditional devices, thereby improving the efficiency of copper busbar processing and ensuring smooth operation of the conveying process.

[0006] The metal part processing apparatus of this utility model includes a conveying assembly and a detection assembly. The conveying assembly has a plurality of support points for receiving and conveying the metal part, and the plurality of support points are located on the same reference plane. The detection assembly includes a first detector, which is movably disposed on the conveying assembly and is a contact detector. The first detector has a first critical position that is at least partially higher than the reference plane. The first detector can move to below the reference plane under the pressure of the metal part and can return to the first critical position when it is not under the pressure of the metal part.

[0007] According to the metal part processing apparatus of this utility model embodiment, after the metal part is placed in the conveying assembly, the conveying assembly supports and conveys the metal part through multiple support points. During this process, the first detector located at the first critical position moves to below the reference plane where the multiple support points are located under the pressure of the metal part's own weight. This effectively avoids the first detector interfering with the reliable contact between the metal part and the multiple support points on the conveying assembly. The weight of the metal part is basically evenly distributed among the components of the conveying assembly, ensuring smooth conveying of the metal part, reducing the pressure on each component, extending the wear and replacement cycle, and increasing the metal part processing efficiency. At the same time, the first detector still has a tendency to return to the first critical position under the pressure of the metal part, thereby ensuring reliable contact between the first detector and the metal part, and increasing the detection reliability of the first detector.

[0008] In some embodiments, the metal processing apparatus further includes a cutting assembly disposed downstream of the conveying assembly, and the detection assembly further includes a second detector disposed on the cutting assembly. The second detector and the first detector are used to detect whether the movement of the metal part is in place.

[0009] In some embodiments, the first detector includes a first metal contact, and the second detector includes a second metal contact;

[0010] The detection component also includes a power supply and a controller. The power supply is connected in series between the first metal contact and the second metal contact. The first metal contact or the second metal contact is electrically connected to the controller, and the controller is electrically connected to the cutting component.

[0011] In some embodiments, the first metal contact is electrically connected to the conveying assembly, and the power supply is connected in series between the conveying assembly and the second metal contact.

[0012] In some embodiments, the cutting assembly includes a cutting platform, a cutting mechanism, and a driving device. The cutting mechanism is mounted on the cutting platform, and the driving device is mounted downstream of the cutting mechanism. The second detector is disposed at the driving end of the driving device and has a detection position that abuts against the cutting platform and a avoidance position that is higher than the cutting platform.

[0013] In some embodiments, the conveying assembly includes a base and a plurality of conveying rollers, the plurality of conveying rollers being mounted on the base and spaced apart along the conveying direction of the conveying assembly, the highest point of the conveying rollers forming the support point;

[0014] The first detector is positioned between any two adjacent conveyor rollers.

[0015] In some embodiments, the conveying assembly further includes a guide roller movably connected to the base, and the first detector is disposed on the guide roller.

[0016] In some embodiments, the conveying assembly further includes a swing bracket pivotally connected to the base via a pivot, and the first detector is disposed on the swing bracket.

[0017] In some embodiments, the swing bracket has a first end and a second end that are radially opposite each other along the pivot, the pivot being located between the first end and the second end of the swing bracket;

[0018] The first detector is disposed at the first end of the swing bracket, and a counterweight is disposed at the second end of the swing bracket.

[0019] In some embodiments, the conveying assembly further includes a torsion spring sleeved on the pivot, with its two ends connected to the base and the swing bracket, respectively, and the torsion spring pressing the first detector on the swing bracket toward the first critical position.

[0020] In some embodiments, the conveying assembly further includes a connecting arm and an elastic element, the connecting arm being slidably connected to the base, the sliding direction of the connecting arm being at an angle to the conveying direction of the conveying assembly, the first detector being disposed on the connecting arm, the elastic element connecting the base and the connecting arm, and the elastic element pressing the first detector on the connecting arm toward the first critical position.

[0021] In some embodiments, the first detector includes a contact sensor, and the second detector includes a contact sensor. Attached Figure Description

[0022] Figure 1This is a schematic diagram of a metal part processing apparatus according to an embodiment of the present utility model.

[0023] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3 This is a schematic diagram of a conveying component in a metal parts processing apparatus according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the cutting component and the second detector in the metal processing apparatus according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the swing bracket, guide roller and counterweight in the metal parts processing device according to an embodiment of the present utility model.

[0027] Figure label:

[0028] 1. Conveying assembly; 11. Base; 12. Conveying roller; 13. Guide roller; 14. Swinging bracket; 15. Counterweight; 16. Bearing seat; 17. Reference surface; 2. Cutting assembly; 21. Cutting platform; 22. Cutting mechanism; 23. Cylinder; 3. Second detector; 4. Copper busbar. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] The following is combined Figures 1-5 This invention describes a metal processing apparatus according to an embodiment of the present invention.

[0031] The metal part processing apparatus of this utility model embodiment includes a conveying assembly 1 and a detection assembly. The conveying assembly 1 has a plurality of support points for receiving and conveying metal parts, and the plurality of support points are located on the same reference plane 17. The detection assembly includes a first detector, which is movably disposed on the conveying assembly 1 and is a contact detector. The first detector has a first critical position that is at least partially above the reference plane 17. The first detector can move below the reference plane 17 under the pressure of the metal part and can return to the first critical position when it is not under the pressure of the metal part.

[0032] According to the metal part processing apparatus of this utility model embodiment, after the metal part is placed in the conveying assembly 1, the conveying assembly 1 supports and conveys the metal part through multiple support points. During this process, the first detector located at the first critical position moves to below the reference surface 17 where the multiple support points are located under the pressure of the metal part's own weight. This effectively avoids the first detector interfering with the reliable contact between the metal part and the multiple support points on the conveying assembly 1. The weight of the metal part is basically evenly distributed among the components where each support member is located in the conveying assembly 1, which not only ensures smooth conveying of the metal part, but also reduces the pressure on each component, extends the wear and replacement cycle, and improves the metal part processing efficiency. At the same time, the first detector still has a tendency to return to the first critical position under the pressure of the metal part, thereby ensuring reliable contact between the first detector and the metal part, and improving the detection reliability of the first detector.

[0033] It should be noted that the metal part can be a copper busbar 4. After the copper busbar 4 is placed on the conveying assembly 1, the bottom surface of the copper busbar 4 is in close contact with the reference surface 17. When the first detector is in the first critical position, the distance between the highest point of the first detector and the reference surface 17 can be 2-4 mm, for example, 2 mm, 3 mm and 4 mm.

[0034] In some embodiments, such as Figure 1 As shown, the metal processing device also includes a cutting assembly 2, which is located downstream of the conveying assembly 1. The detection assembly also includes a second detector 3, which is located on the cutting assembly 2. The second detector 3 and the first detector are used to detect whether the movement of the metal part is in place.

[0035] That is, when the first detector and the second detector 3 detect the metal part at the same time, it means that the metal part has moved into place. At this time, the cutting component 2 cuts the metal part. After the cutting is completed, a metal part of the set length can be obtained, and the cutting reliability of the metal part is higher.

[0036] For example, the cutting component 2 is connected to the conveying component 1, and the cutting working surface of the cutting component 2 is generally coplanar with the reference plane 17 where multiple support points on the conveying component 1 are located.

[0037] In some embodiments, the first detector 3 includes a first metal contact, and the second detector 3 includes a second metal contact. The detection assembly also includes a power supply and a controller, the power supply being connected in series between the first and second metal contacts, the first or second metal contact being electrically connected to the controller, and the controller being electrically connected to the cutting assembly 2.

[0038] That is, the conveying assembly 1 conveys the metal part to the cutting assembly 2 until the metal part contacts the second metal contact. At this point, the metal part is electrically connected between the first and second metal contacts, and the power supply, the first metal contact, the second metal contact, and the metal part form a closed loop. At this time, the second metal contact sends a signal to the controller through a potential change, and the controller controls the cutting assembly 2 to complete the cutting operation of the metal part. The first detector and the second detector 3 of this invention are less expensive than sensor structures and are less affected by dust and impurities in the workshop.

[0039] For example, the controller is electrically connected to the second metal contact via a wire. The second metal contact is located at the end of the cutting assembly 2 away from the conveying assembly 1. The front end of the metal part abuts (electrically connects) to the second metal contact, which means that the metal part has been conveyed to the correct position.

[0040] It should be noted that the controller can also be electrically connected to the first metal contact, or to any position between the first and second metal contacts, as long as it can receive the potential change signal of the closed circuit.

[0041] In some embodiments, the first metal contact is electrically connected to the conveying assembly 1, and a power supply is connected in series between the conveying assembly 1 and the second metal contact.

[0042] Therefore, there is no need to lay additional wires between the first metal contact and the power supply, resulting in lower costs for the metal processing equipment.

[0043] For example, the power supply is 24V, the base 11 of the conveying component 1 is a metal base 11, and the first metal contact is electrically connected to the base 11 of the conveying component 1.

[0044] Alternatively, the first metal contact can also be electrically connected to the power supply via a wire, thereby effectively improving the safety of the metal processing device.

[0045] In some embodiments, the cutting assembly 2 includes a cutting platform 21, a cutting mechanism 22, and a driving device. The cutting mechanism 22 is mounted on the cutting platform 21, and the driving device is mounted downstream of the cutting mechanism 22. A second detector 3 is disposed at the driving end of the driving device. The second detector 3 has a detection position that abuts against the cutting platform 21 and a avoidance position that is higher than the cutting platform 21.

[0046] The second detector 3 abuts against the upper surface of the cutting platform 21 at the detection position to ensure that it can abut against the metal parts on the cutting platform 21 and achieve electrical connection between the two. When the metal parts are detected to have moved into place, the second detector 3 moves to a clearance position under the drive of the drive device to ensure that the metal parts can be transported to the next station through the gap between the second detector 3 and the cutting platform 21 after the cutting operation is completed, thereby ensuring the automatic cutting operation of subsequent metal parts.

[0047] For example, such as Figure 1 and Figure 4 As shown, the driving device is a cylinder 23. The cylinder body of the cylinder 23 is mounted above the cutting platform 21. The free end of the piston of the cylinder 23 is located below the cylinder body. The second detector 3 is located on the side of the piston facing the conveying assembly 1.

[0048] In some embodiments, the conveying assembly 1 includes a base 11 and a plurality of conveying rollers 12. The plurality of conveying rollers 12 are mounted on the base 11 and are arranged at intervals along the conveying direction of the conveying assembly 1. The highest point of the conveying rollers 12 forms a support point. A first detector is disposed between any two adjacent conveying rollers 12.

[0049] Multiple conveying rollers 12 work together to support and transport the metal parts, and the highest points on the conveying rollers 12 form multiple support points connected in a line. At this time, by placing the first detector between any two adjacent conveying rollers 12, it is ensured that the metal parts supported by the multiple conveying rollers 12 pass through the first detector and can press the first detector down below the reference surface 17.

[0050] For example, such as Figure 1 and Figure 3 As shown, the multiple conveying rollers 12 are all cylindrical rollers, and their axial direction is perpendicular to the conveying direction of the conveying assembly 1.

[0051] Alternatively, the conveying assembly 1 may also include a swivel ball, which can also form support points for supporting the metal parts. Or, the conveying assembly 1 may include both a swivel ball and a conveying roller 12.

[0052] In some embodiments, the conveying assembly 1 further includes a guide roller 13, which is movably connected to the base 11, and a first detector is disposed on the guide roller 13.

[0053] As the metal part moves toward the cutting assembly 2, the metal part rolls with the first detector, resulting in less friction between them. Consequently, the first detector wears out more slowly, has a longer service life, and a longer replacement cycle.

[0054] For example, such as Figures 1-3 As shown, the axial direction of the guide roller 13 is aligned with the axial direction of the conveying roller 12. At least a portion of the first detector extends circumferentially along the guide roller 13 and is connected end to end, thereby ensuring that the first detector maintains electrical connection with the metal part at all times during the rotation of the guide roller 13.

[0055] In some embodiments, the conveying assembly 1 further includes a swing bracket 14, which is pivotally connected to the base 11 via a pivot, and a first detector is disposed on the swing bracket 14.

[0056] That is, under the pressure of the metal part, the first detector can pivot relative to the base 11 so that the first detector can move below the reference surface 17, and the position of the first detector can be moved easily.

[0057] For example, such as Figure 5 As shown, the conveying assembly 1 also includes two bearing seats 16, which are fixedly mounted on the base 11. The axial direction of the bearings inside the bearing seats 16 is aligned with the axial direction of the conveying roller 12. A pivot is interference-fitted within the inner ring of the bearings in the two bearing seats 16. Two swing brackets 14 are fitted onto the pivot and located between the two bearing seats 16. The rotating shaft of the guide roller 13 is fixedly mounted between the two swing brackets 14.

[0058] In some embodiments, the swing bracket 14 has a first end and a second end that are radially opposite each other along a pivot, the pivot being located between the first end and the second end of the swing bracket 14. A first detector is disposed at the first end of the swing bracket 14, and a counterweight 15 is disposed at the second end of the swing bracket 14.

[0059] Under the action of the counterweight 15, the guide roller 13 on the swing bracket 14 can rise to the highest point without the action of external force, so that the swing bracket 14 is in a vertical state, and the highest point of the guide roller 13 on the swing bracket 14 is higher than the reference surface 17. This also ensures that when the first detector is pressed below the reference surface 17, it can still be reset to the first critical position.

[0060] For example, such as Figure 5 As shown, the counterweight 15 is connected between the two swing brackets 14.

[0061] It should be noted that the guide roller 13 can also be replaced with a universal ball, and the axis of the pivot does not have to be consistent with the axis of the conveying roller 12, as long as it is not consistent with the conveying direction of the conveying assembly 1.

[0062] Optionally, the conveying assembly 1 also includes a torsion spring, which is sleeved on a pivot and has its two ends connected to the base 11 and the swing bracket 14, respectively. The torsion spring presses the first detector on the swing bracket 14 toward the first critical position.

[0063] The torsion spring can also hold the first detector in the first critical position. After the metal part presses the first detector below the reference surface 17, the torsion spring undergoes elastic deformation to provide a force to press the first detector under the metal part, ensuring the electrical connection between the first detector and the metal part.

[0064] In some embodiments, the conveying assembly 1 further includes a connecting arm and an elastic element. The connecting arm is slidably connected to the base 11. The sliding direction of the connecting arm is at an angle to the conveying direction of the conveying assembly 1. A first detector is disposed on the connecting arm. The elastic element connects the base 11 and the connecting arm. The elastic element presses the first detector on the connecting arm toward a first critical position.

[0065] That is, when the metal part presses against the first detector, the connecting arm can also slide relative to the base 11 to press the elastic element, so as to press the first detector below the reference surface 17. Moreover, the deformed elastic element can also give the first detector a force to reset to the first critical position, ensuring that the first detector is stably abutting against the bottom surface of the metal part.

[0066] For example, the base 11 is provided with a guide groove, the extension direction of the guide groove is at an angle to the height direction, the connecting arm is slidably fitted in the guide groove, the upper end of the guide groove is open and the lower end is closed, the elastic element is a spring, and the spring is clamped between the lower end face of the guide groove and the lower end face of the connecting arm.

[0067] In some embodiments, the first detector includes a contact sensor, and the second detector 3 includes a contact sensor.

[0068] Therefore, the first detector and the second detector 3 can also transmit signals to the controller by contacting the metal part, ensuring that the metal part is cut in time after it is moved into place.

[0069] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0072] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A metal piece processing apparatus characterized by comprising: The application relates to a metal piece processing device, which comprises: a conveying assembly (1) formed with a plurality of supporting points for supporting and conveying the metal pieces, the supporting points being located on a same reference surface (17); a detection assembly comprising a first detector movably arranged on the conveying assembly (1) and being a contact type detector, the first detector having a first critical position at least partially higher than the reference surface (17), the first detector being capable of moving below the reference surface (17) under the pressure of the metal pieces and being capable of resetting to the first critical position when not under the pressure of the metal pieces.

2. The metal piece processing apparatus according to claim 1, characterized by The metal piece processing device further comprises a cutting assembly (2) arranged downstream of the conveying assembly (1), and the detection assembly further comprises a second detector (3) arranged on the cutting assembly (2), the second detector (3) and the first detector being used for detecting whether the movement of the metal pieces is in place.

3. The metal piece processing apparatus according to claim 2, wherein The first detector comprises a first metal contact, and the second detector (3) comprises a second metal contact. The detection assembly further comprises a power supply and a controller, the power supply being connected in series between the first metal contact and the second metal contact, the first metal contact or the second metal contact being electrically connected with the controller, and the controller being electrically connected with the cutting assembly (2). The first metal contact is electrically connected with the conveying assembly (1), and the power supply is connected in series between the conveying assembly (1) and the second metal contact.

4. The metal piece processing apparatus according to claim 2, wherein The cutting assembly (2) comprises a cutting platform (21), a cutting mechanism (22) and a driving device, the cutting mechanism (22) being mounted on the cutting platform (21), the driving device being mounted downstream of the cutting mechanism (22), the second detector (3) being arranged at a driving end of the driving device, and the second detector (3) having a detection position abutting against the cutting platform (21) and a avoiding position higher than the cutting platform (21).

5. The metal piece processing apparatus according to any one of claims 1 to 4, characterized by, The conveying assembly (1) comprises a base (11) and a plurality of conveying rollers (12) mounted on the base (11), the conveying rollers (12) being arranged in intervals along a conveying direction of the conveying assembly (1), and the highest points of the conveying rollers (12) forming the supporting points. The first detector is arranged between any two adjacent conveying rollers (12).

6. The metal piece processing apparatus according to claim 5, wherein The conveying assembly (1) further comprises a guide roller (13) movably connected with the base (11), and the first detector is arranged on the guide roller (13).

7. The metal piece processing apparatus according to claim 5, wherein The conveying assembly (1) further comprises a swing bracket (14) pivotably connected with the base (11) through a pivot, and the first detector is arranged on the swing bracket (14).

8. The metal piece processing apparatus according to claim 7, wherein The swing bracket (14) has a first end and a second end opposite to each other along a radial direction of the pivot, and the pivot is located between the first end and the second end of the swing bracket (14). The first detector is arranged at a first end of the swing bracket (14), and a counterweight (15) is arranged at a second end of the swing bracket (14).

9. The metal piece processing apparatus according to claim 7, wherein The conveying assembly (1) further comprises a torsion spring sleeved on the pivot, two ends of the torsion spring being connected with the base (11) and the swing bracket (14) respectively, and the torsion spring pressing the first detector on the swing bracket (14) towards the first critical position.

10. The metal piece processing apparatus according to claim 5, wherein The conveying assembly (1) further comprises a connecting arm and an elastic member, the connecting arm being slidably connected with the base (11), a sliding direction of the connecting arm being at an angle with a conveying direction of the conveying assembly (1), the first detector being arranged on the connecting arm, and the elastic member connecting the base (11) and the connecting arm and pressing the first detector on the connecting arm towards the first critical position.

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