A kind of edge material winding device with breakable stop

Abstract

The utility model discloses an edge material winding device of material breakage shutdown, include: winding mechanism for winding recovery to edge material, material breakage sensing mechanism, including support, set up on the support be used for producing and output tension sensing portion of tension abnormal signal, and controller with winding mechanism, material breakage sensing mechanism electricity is connected for receiving tension abnormal signal and sends the shutdown signal to winding mechanism. The utility model has the beneficial effect that: the tension sensing portion set up in the application can send tension abnormal signal when breaking material, guarantee breaking material, and the edge material winding device can automatically shutdown, avoid the occurrence of the wear and tear of cutter, the scrap of the material to be slitting etc.

Description

Technical Field

[0001] This utility model relates to online waste recycling technology, and more particularly to an edge material winding device that can stop the machine when the material is cut off. Background Technology

[0002] Rolled materials refer to materials that are stored by winding various raw materials into rolls on a winding cylinder, such as paper, sheets, and films. In the slitting process of materials such as paper, film, and plastic sheets, wide strips of material are cut into narrow strips. During this process, it is necessary to remove the edge material reserved on both sides of the material to be slit to ensure the dimensional accuracy of the slit strips. For example, CN207371659U discloses an edge material recycling device for a carrier tape forming machine, including an edge material recycling device body, a feed inlet, a feed inlet cover, a discharge outlet, an edge material crushing device, a sensor, and a power unit. The edge material crushing device includes a speed controller, a crushing main shaft, and crushing blades. The crushing blades are T-shaped, and crushing is achieved by using T-shaped crushing blades at an angle of 30° to 80° with the crushing main shaft. A filter screen is also provided to improve the recovery rate, thus achieving efficient crushing and recycling of edge materials. However, if the machine cannot be stopped in time when the edge material breaks, the broken material may be rolled into the slitting tool, causing wear on the tool, or the broken material may become entangled with the material to be slitted, affecting the slitting accuracy and causing the material to be slitted to be scrapped.

[0003] Therefore, there is an urgent need to develop an edge material winding device that can automatically stop the machine when the material is cut off, and avoid the wear of the cutting tools and the scrapping of the material to be cut caused by the material cut-off. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, this utility model provides an edge material winding device that can stop the machine when the material is cut off. This application provides an edge material winding device that can automatically stop the machine when the material is cut off by setting a material cut-off sensing mechanism, thereby avoiding the occurrence of blade wear and scrap of materials to be cut caused by material cut-off.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows: An edge material winding device capable of stopping the machine due to material breakage includes: A winding mechanism is used to wind and recycle edge material; The material breakage sensing mechanism includes a support, a tension sensing unit disposed on the support for generating and outputting a tension abnormality signal; and The controller is electrically connected to the winding mechanism and the material breakage sensing mechanism, and is used to receive the tension abnormality signal and send a stop signal to the winding mechanism.

[0006] The edge material winding device of this application triggers a shutdown by using the tension sensing part of the material breakage sensing mechanism to generate an abnormal tension signal when the material breaks, thereby avoiding situations such as tool wear and scrap of the material to be cut caused by material breakage.

[0007] As a preferred embodiment of this application, the material breakage sensing mechanism further includes a speed sensing unit disposed on the winding mechanism and electrically connected to the controller, for generating and outputting a speed abnormality signal to the controller, and the controller sending a stop signal to the winding mechanism.

[0008] When the edge material breaks, the broken material may become entangled with the tension shaft, preventing the tension shaft from automatically switching to the optical path blocking position. This causes the tension sensing unit to malfunction, while the speed sensor, due to the broken edge material, detects a rotational speed exceeding the set threshold. At this point, the speed sensor generates a corresponding rotational speed signal, which is then transmitted to the controller as a speed anomaly signal. The controller then sends a stop signal to the winding mechanism, causing it to stop. This application achieves dual signal verification (tension anomaly signal + speed anomaly signal) during material breakage through the material breakage sensing mechanism and the tension and speed sensing units, effectively avoiding unplanned shutdowns caused by false triggering of a single sensor and improving the reliability of the device. The controller can dynamically adjust the rotational speed setting threshold based on historical data. When edge material breakage or a momentary deviation in the winding shaft speed is detected (e.g., the broken material becomes entangled with the tension shaft), the device can quickly process the material breakage signal and execute an emergency stop command.

[0009] As a preferred embodiment of this application, the winding mechanism includes: Base; A motor, mounted on the base and electrically connected to the controller, is used to provide winding power and stops when the stop signal is received; A winding shaft, connected to the motor, is used to wind up the edge material.

[0010] As a preferred embodiment of this application, the tension sensing unit includes: A guide shaft, mounted on the support, is used to guide the travel path of the broken material; An infrared sensor, mounted on the support and electrically connected to the controller, includes a transmitter for emitting infrared light signals and a receiver for receiving reflected light signals; and The tension adjustment component, hinged to the guide shaft, has a switchable working position and an optical path blocking position. In the optical path blocking position, part of the tension adjustment component is located between the transmitting end and the receiving end, and is used to convert the infrared light signal emitted by the transmitting end into a reflected light signal. In the working position, the tension adjustment component is deviated from the optical path blocking position by the edge material tension to keep the emitted infrared light signal unobstructed. When the edge material breaks, the tension adjustment component is in the optical path blocking position and transmits the reflected light signal generated by blocking the emitted infrared light signal as the tension abnormality signal to the controller.

[0011] As a preferred embodiment of this application, the guide shaft includes an integrally formed front guide portion and a rear fixing portion, the rear fixing portion being disposed on the support; the front guide portion is provided with a guide groove for guiding and defining the travel path of the edge material. More preferably, the guide groove is an annular groove.

[0012] As a preferred embodiment of this application, the tension adjustment component includes: Tension shaft, hinged to the guide shaft and swinging about the hinge point of the guide shaft; A tension sensor is fixedly installed at the end of the tension shaft away from the hinge, and is used to sense the tension of the edge material.

[0013] As a preferred embodiment of this application, the tension sensing element is provided with a through hole or a groove for the movement of the edge material.

[0014] More preferably, the tension sensing element can be an integrally formed ring at the end of the tension shaft, with the edge material passing through the through hole in the center of the ring and wound onto the take-up shaft, and the top of the ring pressing on the edge material to sense the tension.

[0015] Alternatively, the tension sensing element may be an arc-shaped portion integrally formed at the end of the tension shaft.

[0016] When the edge material breaks, the tension shaft swings down to the position where the light path is blocked due to its own gravity. The emitted infrared light signal is blocked by the tension sensing element and forms a reflected light signal. The receiving end receives the reflected light signal as a tension abnormality signal and transmits it to the controller.

[0017] As a preferred embodiment of this application, the speed sensing unit includes: The converter, mounted on the base, is mechanically linked with the take-up shaft to achieve rotational speed synchronization; and A speed sensor, electrically connected to the converter and the controller, is used to automatically generate and transmit a speed abnormality signal to the controller when the rotational speed of the converter exceeds the set threshold of the rotational speed of the take-up shaft.

[0018] As a preferred embodiment of this application, the converter comprises: The drive pulley is coaxially assembled with the output shaft of the motor; The driven pulley is coaxially mounted with the winding shaft and forms a transmission connection with the driving pulley via a belt; and A connecting bearing is disposed on the base, and the winding shaft is rotatably disposed on the base via the connecting bearing.

[0019] As a preferred embodiment of this application, the speed sensor includes a metal sensor, a proximity switch, and a speedometer. The metal sensor is disposed at the axis of the connecting gear bearing and rotates synchronously with the winding shaft. The sensing surface of the proximity switch faces the axis of the connecting gear bearing and is used to detect the rotational speed signal of the metal sensor in real time. The speedometer is electrically connected to the proximity switch and is used to convert the rotational speed signal into a real-time rotational speed value for display. Since the winding shaft rotates synchronously with the metal sensor, it means that the rotational speed of the metal sensor is the same as the rotational speed of the winding shaft. Therefore, monitoring the rotational speed of the metal sensor is sufficient. The proximity switch can be an inductive proximity switch. This type of proximity switch detects metal objects through electromagnetic induction. When the metal sensor rotates into the sensing range of the proximity switch, a switching signal is generated, thereby monitoring the rotational speed of the metal sensor in real time.

[0020] In use, the edge material is sequentially wound around the guide groove of the guide shaft, the through hole or pressure groove of the tension shaft, and then the motor drives the winding shaft to rotate for winding. Because the tension sensor at the end of the tension shaft can block the emitted infrared light signal at the optical path blocking position and form an emitted light signal that can be received by the receiver, when the edge material breaks, the tension shaft naturally falls under its own gravity. Its end blocks the infrared light signal between the transmitter and receiver. The reflected light signal is received by the receiver of the infrared sensor and transmitted to the controller as a tension abnormality signal. The controller then sends a stop signal to the winding mechanism to stop the machine. When the edge material breaks and the broken material becomes entangled with the tension shaft, although the tension shaft cannot fall automatically, resulting in no tension abnormality signal being generated, the speed sensor detects a rotational speed exceeding a set threshold. This speed signal is transmitted to the controller as a speed abnormality signal, and the controller sends a stop signal to the winding mechanism to stop the machine.

[0021] Compared with the prior art, the beneficial effects of this utility model are: This application sets up a material breakage sensing mechanism, which sends an abnormal tension signal or an abnormal speed signal when the material breaks. Through the dual protection of tension sensing and speed sensing, it ensures that the edge material winding device can automatically stop when the material breaks, thus avoiding the occurrence of blade wear, scrap of materials to be cut and other situations caused by material breakage. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2This is a schematic diagram of the tension sensing part of this utility model (position A in the figure is the working position, and position B is the optical path blocking position).

[0024] Figure 3 This is a schematic diagram of the speed sensing unit of this utility model.

[0025] Figure 4 This is a schematic diagram of the speed sensor of this utility model.

[0026] Wherein: 1-Rewinding mechanism; 11-Base; 12-Rewinding shaft; 13-Motor; 2-Material breakage sensing mechanism; 21-Support; 22-Tension sensing unit; 221-Guide shaft; 2211-Guide groove; 222-Tension adjustment assembly; 2221-Tension shaft; 2222-Tension sensing element; 223-Infrared sensor; 23-Speed ​​sensing unit; 231-Converter; 2311-Driven pulley; 2312-Connecting bearing; 2313-Driven pulley; 2314-Belt; 232-Speed ​​sensor; 2321-Metal sensing element; 2322-Proximity switch; 2323-Speed ​​gauge; 3-Controller; 4-Edge material. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0028] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0029] Furthermore, it should be understood that the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, does not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, unless otherwise stated. It should also be understood that the combined connection relationship between one or more devices / apparatus mentioned in this application does not preclude the existence of other devices / apparatus before or after the combined devices / apparatus, or the insertion of other devices / apparatus between these explicitly mentioned devices / apparatus, unless otherwise stated. Moreover, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or limiting the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this application.

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not 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 application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0034] The present application will be further described below with reference to specific embodiments, but the scope of protection of the present application is not limited thereto.

[0035] like Figures 1-3 As shown, the edge material winding device with material interruption and machine stop according to this utility model includes a winding mechanism 1 for winding and recycling edge material, and further includes: The material breakage sensing mechanism 2 includes a support 21, a tension sensing unit 22 disposed on the support 21 for generating and outputting a tension abnormality signal; and The controller 3 is electrically connected to the winding mechanism 1 and the material breakage sensing mechanism 2, and is used to receive the tension abnormality signal and send a stop signal to the winding mechanism 1.

[0036] like Figure 1 As shown, the material breakage sensing mechanism 2 also includes a speed sensing unit 23 disposed on the winding mechanism and electrically connected to the controller 3, for generating and outputting a speed abnormality signal to the controller 3, and the controller 3 sending a stop signal to the winding mechanism 1.

[0037] like Figure 1 As shown, the winding mechanism 1 includes: Base 11; The motor, mounted on the base 11 and electrically connected to the controller 3, is used to provide winding power and stops when the stop signal is received. The winding shaft 12 is connected to the motor for winding the edge material 4.

[0038] like Figure 1 and Figure 2 As shown, the tension sensing unit 22 includes: The guide shaft 221 is mounted on the support 21 and is used to guide the travel path of the edge material 4; An infrared sensor 223 is mounted on the support 21 and electrically connected to the controller 3. The infrared sensor includes a transmitter for emitting infrared light signals and a receiver for receiving reflected light signals; and Tension adjustment component 222, hinged to guide shaft 221, has a switchable working position A and light path blocking position B. In the light path blocking position, part of tension adjustment component 222 is located between the transmitting end and the receiving end, used to convert the infrared light signal emitted by the transmitting end into a reflected light signal. In the working position, tension adjustment component 222 is deviated from the light path blocking position by the tension of edge material 4 to keep the emitted infrared light signal unobstructed. When edge material 4 breaks, tension adjustment component 222 is in the light path blocking position and transmits the reflected light signal generated by blocking the emitted infrared light signal as the tension abnormality signal to controller 3.

[0039] like Figure 1 and Figure 2 As shown, the guide shaft 221 includes an integrally formed front guide part and a rear fixing part, the rear fixing part being disposed on the support 21; the front guide part is provided with a guide groove 2211 for guiding and limiting the travel path of the edge material 4.

[0040] like Figure 2 As shown, the tension adjustment assembly 222 includes: Tension shaft 2221 is hinged to the guide shaft and swings about the hinge point of guide shaft 221; Tension sensing element 2222 is fixedly installed at the end of tension shaft 2221 away from the hinge, and is used to sense the tension of edge material 4.

[0041] like Figure 2 As shown, the tension sensing element 2222 is provided with through holes or pressure grooves.

[0042] like Figure 2 As shown, the tension sensing element can be an integrally formed ring at the end of the tension shaft. The edge material passes through the through hole in the center of the ring and is wound onto the take-up shaft. The top of the ring presses down on the edge material to sense the tension. When the edge material breaks, the tension shaft swings down due to its own gravity, and the tension sensing element is located in the emission path of the light signal. This causes the emitted light signal to be blocked by the tension sensing element, forming a reflected light signal. The receiving end receives this light signal and transmits it to the controller as a tension abnormality signal.

[0043] In some embodiments of this application, the tension sensing element is an arc-shaped portion integrally formed at the end of the tension shaft.

[0044] like Figure 3 and Figure 4 As shown, the speed sensing unit 23 includes: The converter 231, mounted on the base 11, is mechanically linked to the take-up shaft 12 to achieve rotational synchronization; and Speed ​​sensor 232, electrically connected to converter 231 and controller 3, is used to automatically generate and transmit a speed abnormality signal to controller 3 when the rotational speed of converter 231 is higher than the rotational speed of take-up shaft 12 set threshold.

[0045] like Figure 3 As shown, the converter 231 includes: The drive belt pulley 2313 is coaxially assembled with the output shaft of the motor 13; Driven pulley 2311 is coaxially mounted with the winding shaft 12 and forms a transmission connection with the driving pulley 2313 via belt 2314; and A connecting bearing 2312 is disposed on the base 11, and the take-up shaft 12 is rotatably disposed on the base 11 via the connecting bearing 2312.

[0046] like Figure 3As shown, the speed sensor 232 includes a metal sensor 2321, a proximity switch 2322, and a speedometer 2323. The metal sensor 2321 is disposed on the axis of the connecting gear bearing 2312 and rotates synchronously with the winding shaft 12. The sensing surface of the proximity switch 2322 faces the axis of the connecting gear bearing 2312 and is used to detect the rotational speed signal of the metal sensor 2321 in real time. The speedometer 2323 is electrically connected to the proximity switch 2322 and is used to convert the rotational speed signal into a real-time rotational speed value for display. The proximity switch can be an inductive proximity switch, such as the BALLUFF BES M18 series inductive proximity switch. This type of proximity switch detects metal objects through electromagnetic induction and can stably detect metal sensors even at a high frequency of 2000 rpm. When the metal sensor enters the sensing range of the proximity switch, a switching signal is generated, thereby monitoring the rotational speed of the metal sensor in real time.

[0047] In use, the edge material 4 is wound sequentially through the guide groove 2211 of the guide shaft 221, the through hole or pressure groove of the tension shaft 2221, and then the motor drives the winding shaft 12 to rotate for winding. Since the tension sensing element 2222 at the end of the tension shaft 2221 is located on the emission path of the light signal, when the edge material 4 breaks, the tension shaft 2221 naturally swings downward under its own gravity, and its end blocks the light path between the transmitting end and the receiving end. The reflected light signal is received by the receiving end of the infrared sensor and is transmitted to the controller as a tension abnormality signal. The controller 3 sends a stop signal to the winding mechanism 1 and then stops the machine. When the edge material 4 breaks, and the broken material is entangled with the tension shaft, the tension shaft 2221 cannot swing to the correct position and cannot block the infrared light signal emitted by the infrared sensor, thus resulting in no tension abnormality signal being generated. However, after the winding shaft 12 loses the pull of the edge material 4, its rotation speed increases, causing the speed sensed by the speed sensor 232 to be higher than the set threshold. The speed signal is transmitted to the controller as a speed abnormality signal, and the controller 3 sends a stop signal to the winding mechanism 1 and then stops the machine.

[0048] This application uses an infrared sensor to detect the position status of the tension adjustment component (mechanical material breakage characteristic) and a speed sensor to detect abnormal rotation speed (electrical material breakage characteristic) to determine material breakage. The material breakage event can be confirmed by triggering either signal, and the judgment result is accurate, effectively avoiding misjudgment by a single signal.

[0049] The above embodiments are for illustrating the implementation schemes disclosed in this utility model and should not be construed as limiting the utility model. Furthermore, various modifications listed herein, as well as variations in the methods and compositions of the utility model, will be apparent to those skilled in the art without departing from the scope and spirit of this utility model. Although this utility model has been specifically described in conjunction with various specific preferred embodiments, it should be understood that this utility model should not be limited to these specific embodiments. In fact, various modifications as described above that are obvious to those skilled in the art to obtain the utility model should be included within the scope of this utility model.

Claims

1. A material winding device capable of stopping the machine due to material interruption, characterized in that, include: A winding mechanism (1) is used to wind and recycle the edge material (4); The material breakage sensing mechanism (2) includes a support (21), a tension sensing unit (22) disposed on the support (21) for generating and outputting a tension abnormality signal; and The controller (3) is electrically connected to the winding mechanism (1) and the material breakage sensing mechanism (2) and is used to receive the tension abnormality signal and send a stop signal to the winding mechanism (1); The tension sensing unit (22) includes: A guide shaft (221) is mounted on the support (21) and is used to guide the travel path of the edge material (4); An infrared sensor (223) is mounted on the support (21) and electrically connected to the controller (3). The infrared sensor includes a transmitter for emitting infrared light signals and a receiver for receiving reflected light signals. The tension adjustment component (222) is hinged to the guide shaft (221) and has a switchable working position and a light path blocking position. In the light path blocking position, part of the tension adjustment component (222) is located between the transmitting end and the receiving end, and is used to convert the infrared light signal emitted by the transmitting end into a reflected light signal. In the working position, the tension adjustment component (222) is deviated from the light path blocking position by the tension of the edge material (4) to keep the emitted infrared light signal unobstructed. When the edge material (4) breaks, the tension adjustment component (222) is in the light path blocking position and transmits the reflected light signal generated by blocking the emitted infrared light signal as the tension abnormal signal to the controller (3).

2. The edge material winding device with material interruption and shutdown capability according to claim 1, characterized in that, The material breakage sensing mechanism (2) further includes a speed sensing unit (23) disposed on the winding mechanism (1) and electrically connected to the controller (3), for generating and outputting a speed abnormality signal to the controller (3), and the controller (3) sending a stop signal to the winding mechanism (1).

3. The edge material winding device with material interruption and shutdown capability according to claim 2, characterized in that, The winding mechanism (1) includes: Base (11); The motor (13), which is mounted on the base (11) and electrically connected to the controller (3), is used to provide winding power and to stop when the stop signal is received; The winding shaft (12) is powered by the motor (13) and is used to wind up the edge material (4).

4. The edge material winding device with material interruption and shutdown capability according to claim 1, characterized in that, The guide shaft (221) includes an integrally formed front guide part and a rear fixing part, the rear fixing part being disposed on the support (21); the front guide part is provided with a guide groove (2211) for guiding and limiting the travel path of the edge material (4).

5. The edge material winding device with material interruption and shutdown capability according to claim 1, characterized in that, The tension adjustment assembly (222) includes: Tension shaft (2221) is hinged to guide shaft (221) and swings about the hinge point of guide shaft (221); Tension sensing element (2222) is fixedly disposed at the end of the tension shaft (2221) away from the hinge, and is used to sense the tension of the edge material (4).

6. The edge material winding device with material interruption and shutdown capability according to claim 5, characterized in that, The tension sensing element (2222) is provided with through holes or grooves for the movement of the edge material (4).

7. The edge material winding device with material interruption and shutdown capability according to claim 3, characterized in that, The speed sensing unit (23) includes: A converter (231), disposed on the base (11), is mechanically linked with the take-up shaft (12) to achieve rotational synchronization; and A speed sensor (232) is electrically connected to the converter (231) and the controller (3) and is used to automatically generate and transmit the speed abnormality signal to the controller (3) when the rotational speed of the converter (231) exceeds the rotational speed setting threshold of the take-up shaft (12).

8. The edge material winding device with material interruption and shutdown capability according to claim 7, characterized in that, The converter (231) includes: The drive pulley (2313) is coaxially assembled with the output shaft of the motor (13); Driven pulley (2311) is coaxially mounted with the take-up shaft (12) and forms a transmission connection with the driving pulley (2313) via belt (2314); and A connecting bearing (2312) is disposed on the base (11), and the winding shaft (12) is rotatably disposed on the base (11) via the connecting bearing (2312).

9. The edge material winding device with material interruption and shutdown capability according to claim 8, characterized in that, The speed sensor (232) includes a metal sensor (2321), a proximity switch (2322), and a speedometer (2323). The metal sensor (2321) is disposed on the axis of the connecting bearing (2312) and rotates synchronously with the winding shaft (12). The sensing surface of the proximity switch (2322) is facing the axis of the connecting bearing (2312) and is used to detect the rotation speed signal of the metal sensor (2321) in real time. The speedometer (2323) is electrically connected to the proximity switch (2322) and is used to convert the rotation speed signal into a real-time rotation speed value for display.

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