A pulley device, a pulley failure monitoring system and monitoring method

Abstract

A pulley device includes: an outer ring (10) with a first rim (11) on its side and a first notch (12) on the first rim (11); a hub (20) with a second rim (21) on its side and a second notch (22) on the second rim (21); a rubber ring (30) disposed between the outer ring (10) and the hub (20), wherein the first rim (11) and the second rim (21) protrude outward relative to the side of the rubber ring (30); and a monitoring device connected to the hub (20), wherein the monitoring device includes a signal transceiver (40), and the signal transceiver (40), the first notch (12), and the second notch (22) are collinear. The device also includes a pulley failure monitoring system and method. By monitoring whether the first and second notches are misaligned through the signal transceiver of the monitoring device, the condition of the rubber ring can be monitored, and the failure of the rubber ring can be detected in a timely manner.

Description

Technical Field

[0001] This invention relates to the field of engine structure, and more specifically to a pulley device, a pulley failure monitoring system, and a monitoring method. Background Technology

[0002] Currently, pulleys consist of three parts: the hub, the outer rim, and the rubber ring. The hub is rigidly connected to the crankshaft, the outer rim drives the water pump, alternator, and other front-end pulley systems via a belt, and the hub and outer rim are flexibly connected by the rubber ring. With prolonged engine operation, the rubber ring ages, weakens its connection, and relative slippage may occur between the hub and the outer rim, or even the outer rim may detach. This can cause functional components such as the water pump and alternator to fail, leading to increased water temperature, and in severe cases, bearing failure, resulting in engine damage. Because the condition of the rubber ring in the pulley cannot be monitored, its failure is only detected when excessive water temperature or bearing failure occurs, by which time significant engine damage has already occurred.

[0003] If the rubber ring in the engine pulley ages and fails, it can cause slippage between the hub and the outer rim, leading to the malfunction of belt-driven components such as the water pump and alternator. This can ultimately result in engine damage such as cylinder scoring and bearing failure. Currently, it's impossible to monitor whether the rubber ring is failing; the problem is only discovered when the engine suffers significant damage. At this point, not only must the rubber ring be replaced, but other components such as the water pump and alternator may also need to be replaced. The cost of these replacement parts is high, and in severe cases, the entire engine may need to be replaced, resulting in very high repair costs.

[0004] Therefore, it is necessary to provide a solution to address the technical problems in the existing technology of being unable to monitor the condition of the rubber ring in the pulley and being unable to detect the aging and failure of the rubber ring in a timely manner. Summary of the Invention

[0005] To address the technical problems of existing technologies that cannot monitor the condition of rubber rings in pulleys and cannot detect rubber ring aging and failure in a timely manner, this invention proposes a pulley device, a pulley failure monitoring system, and a monitoring method.

[0006] The present invention provides a pulley device, comprising:

[0007] The outer rim has a first rim on its side, and the first rim has a first notch;

[0008] A wheel hub, wherein a second rim is provided on the side of the wheel hub, and the second rim is provided with a second notch;

[0009] A rubber ring is disposed between the outer rim and the hub, and the first rim and the second rim protrude outward relative to the side of the rubber ring;

[0010] A monitoring device is connected to the wheel hub. The monitoring device is equipped with a signal transceiver. The signal transceiver, the first notch, and the second notch are collinear.

[0011] A further improvement of the pulley device provided by the present invention is that the monitoring device includes a mounting base and a support arm, one end of the support arm is connected to the mounting base, the other end of the support arm is connected to the signal transceiver, the mounting base is provided with a mounting hole, and the mounting hole is coaxially arranged with the shaft hole of the hub.

[0012] A further improvement of the pulley device provided by the present invention is that the signal transceiver includes a signal transmitting end and a signal receiving end;

[0013] The signal transmitting end is used to transmit a first monitoring signal. When the signal transceiver, the first gap, and the second gap are collinear, the first monitoring signal passes through the first gap and the second gap. When the second gap is misaligned with the first gap, the first monitoring signal is reflected by the first rim to form a second monitoring signal. The signal receiving end is used to receive the second monitoring signal.

[0014] In addition, the present invention also provides a pulley failure monitoring system, including an electronic control unit and the above-mentioned pulley device, wherein the signal transceiver of the pulley device is signal connected to the electronic control unit;

[0015] The transceiver is used to send the second monitoring signal to the electronic control unit when it receives the second monitoring signal;

[0016] The electronic control unit is used to perform protective control on the pulley device based on the second monitoring signal sent by the signal transceiver.

[0017] A further improvement of the pulley failure monitoring system provided by the present invention is that the electronic control unit includes a displacement monitoring module and a control module;

[0018] The displacement monitoring module is used to process the second monitoring signal to obtain a displacement signal, and send the displacement signal to the control module;

[0019] The control module is used to cut off the power input to the pulley device based on the displacement signal.

[0020] A further improvement of the pulley failure monitoring system provided by the present invention is that the control module is also used to trigger an alarm based on the displacement signal.

[0021] Furthermore, the present invention also provides a method for detecting pulley failure using the above-described pulley failure monitoring system, comprising:

[0022] The signal transceiver of the monitoring device is used to obtain a feedback signal. When the obtained feedback signal is the second monitoring signal, the second monitoring signal is sent to the electronic control unit. The second monitoring signal is used to indicate that the outer wheel rim of the pulley device is misaligned with the hub.

[0023] The electronic control unit receives the second monitoring signal and performs protective control on the pulley device based on the second monitoring signal.

[0024] A further improvement of the pulley failure monitoring method provided by the present invention is that the step of performing protective control on the pulley device based on the second monitoring signal includes:

[0025] The second monitoring signal is processed to obtain a displacement signal;

[0026] The power input to the pulley device is cut off based on the displacement signal.

[0027] A further improvement of the pulley failure monitoring method provided by the present invention is that the protective control of the pulley device based on the second monitoring signal further includes: triggering an alarm prompt based on the displacement signal.

[0028] A further improvement of the pulley failure monitoring method provided by the present invention is that the step of acquiring feedback signals using the signal transceiver of the monitoring device includes:

[0029] When the signal transceiver, the first gap of the first rim, and the second gap of the second rim are collinear, the first monitoring signal transmitted by the signal transmitting end of the signal transceiver passes through the first gap and the second gap, and the feedback signal received by the signal receiving end of the signal transceiver is empty;

[0030] When the second gap is misaligned with the first gap, the first monitoring signal transmitted by the signal transmitting end is reflected by the first rim where the first gap is located to form a second monitoring signal, and the feedback signal received by the signal receiving end is the second monitoring signal.

[0031] By adopting the above technical solution, the pulley device, pulley failure monitoring system and monitoring method provided by the present invention have the following beneficial effects: The present invention monitors whether the first notch and the second notch are misaligned through the signal transceiver of the monitoring device, thereby realizing the monitoring of the rubber ring status and enabling timely monitoring or detection of rubber ring failure; when the rubber ring fails, the fuel injector can be cut off in time and a warning message can be displayed on the instrument panel to alert the driver that the vehicle has a malfunction, avoiding more serious vehicle damage or malfunction due to rubber ring failure and ensuring driving safety. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the pulley device provided in Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the control relationship of the pulley failure monitoring system provided in Embodiment 2 of the present invention;

[0035] Figure 3 This is a flowchart of the pulley failure monitoring method provided in Embodiment 3 of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] To address the technical problems of existing technologies that cannot monitor the condition of rubber rings in pulleys and cannot detect rubber ring aging and failure in a timely manner, this invention proposes a pulley device, a pulley failure monitoring system, and a monitoring method. This invention is specifically implemented through the following technical solutions.

[0038] Example 1:

[0039] Combination Figure 1 As shown, the pulley device provided in this embodiment 1 includes an outer wheel ring 10, a hub 20, a rubber ring 30, and a monitoring device. The outer wheel ring 10 has a first rim 11 on its side, and the first rim 11 has a first notch 12. The hub 20 has a second rim 21 on its side, and the second rim 21 has a second notch 22. The rubber ring 30 is located between the outer wheel ring 10 and the hub 20. The first rim 11 and the second rim 21 protrude outward relative to the side of the rubber ring 30. The monitoring device is connected to the hub 20 and has a signal transceiver 40. The signal transceiver 40, the first notch 12, and the second notch 22 are collinear.

[0040] In an engine, pulleys are used to drive water pumps, generators, and other components via belts. The pulleys are mounted on the crankshaft. When the engine is running, the pulleys rotate with the crankshaft. The impact force is first transmitted to the hub 20, then to the damping rubber ring 30 in the middle layer, and finally from the rubber ring 30 to the outer ring 10. Thus, the impact force on the outer ring 10 is reduced by the rubber ring 30, thereby achieving a vibration damping effect.

[0041] In this embodiment 1, the transceiver 40 of the monitoring device can emit a first monitoring signal and receive a second monitoring signal. The second monitoring signal is formed by reflecting the first monitoring signal. When the rubber ring 30 is not faulty, since the transceiver 40, the first notch 12, and the second notch 22 are collinear, the first monitoring signal emitted by the transceiver 40 can pass through the first notch 12 and the second notch 22, and the transceiver 40 cannot receive the second monitoring signal (reflected signal). When the rubber ring 30 is not faulty, the transceiver 40, the first notch 12, and the second notch 22 are all located in the radial direction of the hub 20.

[0042] When the rubber ring 30 fails, the hub 20 and the outer rim 10 cannot rotate synchronously, causing misalignment between the second notch 22 of the second rim 21 and the first notch 12 of the first rim 11. Since the monitoring device is connected to the hub 20, it can rotate synchronously with the hub 20, and the transceiver 40 of the monitoring device remains in the radial direction of the hub 20 with respect to the second notch 22. Therefore, the first monitoring signal emitted by the transceiver 40 passes through the second notch 22 and reaches the first rim 11. The first monitoring signal is reflected by the first rim 11 to form a second monitoring signal, which passes through the second notch 22 and is received by the transceiver 40. The transceiver 40 receiving the second monitoring signal indicates that the rubber ring 30 has failed. Thus, in this embodiment 1, the transceiver 40 of the monitoring device monitors whether the first notch 12 and the second notch 22 are misaligned, thereby achieving the monitoring of the state of the rubber ring 30.

[0043] In this embodiment 1, the first rim 11 and the second rim 21 protrude outward relative to the side of the rubber ring 30, which can prevent the rubber ring 30 from blocking the first notch 12 and the second notch 22 and prevent the rubber ring 30 from reflecting the first monitoring signal.

[0044] Furthermore, the monitoring device includes a mounting base 50 and a support arm. One end of the support arm is connected to the mounting base 50, and the other end of the support arm is connected to the signal transceiver 40. The mounting base 50 is provided with a mounting hole, which is coaxially arranged with the shaft hole of the hub 20.

[0045] In this embodiment 1, the monitoring device is adapted to the engine structure. The crankshaft passes through the shaft hole of the hub 20 and the mounting hole of the mounting base 50, meaning both the mounting base 50 and the hub 20 extend beyond the crankshaft. After the engine is assembled, the mounting base 50 can tightly abut against the hub 20, and the rotation of the crankshaft can drive the mounting base 50 and the hub 20 to rotate synchronously. The support arm can be welded to the mounting base 50, and the transceiver 40 is mounted on the support arm. The mounting base 50 can drive the support arm and the transceiver 40 to rotate, thereby allowing the transceiver 40 and the hub 20 to rotate synchronously around the crankshaft.

[0046] In this embodiment 1, the mounting base 50 is annular, the first end of the support arm, the first notch 12 and the second notch 22 are collinear, and the second end of the support arm is connected to the curved surface of the mounting base 50.

[0047] Furthermore, the signal transceiver 40 includes a signal transmitting end and a signal receiving end; the signal transmitting end is used to transmit a first monitoring signal. When the signal transceiver 40, the first notch 12 and the second notch 22 are collinear, the first monitoring signal passes through the first notch 12 and the second notch 22. When the second notch 22 is misaligned with the first notch 12, the first monitoring signal is reflected by the first rim 11 to form a second monitoring signal. The signal receiving end is used to receive the second monitoring signal.

[0048] In this embodiment 1, the signal transceiver 40 can be a position sensor. A position sensor is a sensor that can sense the position of a measured object and convert it into a usable output signal. It can be divided into contact position sensors and proximity position sensors. Contact position sensors include limit switches, two-dimensional matrix position sensors, etc., while proximity position sensors include electromagnetic, photoelectric, eddy current, capacitive, Hall effect, and ultrasonic position sensors, etc. In this embodiment 1, a photoelectric position sensor can be used. A photoelectric position sensor is a photoelectric device sensitive to the position of a light spot on an incident photosensitive surface. It is a photoelectric position-sensitive detector based on the transverse photoelectric effect, characterized by high sensitivity, high resolution, fast response speed, and simple circuit configuration. The photoelectric effect refers to the phenomenon of automatic discharge from light energy to electrical energy. Specifically, it means that the greater the number of incident photons per unit time, the more photoelectrons are emitted, and the stronger the photocurrent. Preferably, in this embodiment 1, the signal transceiver 40 is a wireless position sensor.

[0049] Example 2:

[0050] Combination Figure 2As shown, this embodiment 2 provides a pulley failure monitoring system including an electronic control unit and the pulley device in embodiment 1. The signal transceiver 40 of the pulley device is connected to the electronic control unit. The signal transceiver 40 is used to send the second monitoring signal to the electronic control unit when it receives the second monitoring signal. The electronic control unit is used to perform protective control on the pulley device according to the second monitoring signal sent by the signal transceiver 40.

[0051] The electronic control unit (ECU) has both computational and control functions. When the engine is running, the ECU can collect relevant signals from sensors, perform calculations, and convert the results into control signals to control the operation of the controlled object. The ECU can analyze the collected signals and, based on the analysis results, control various parameters of the engine, including ignition, air-fuel ratio (the mass ratio of air to fuel in the air-fuel mixture), idle speed (when the engine is in neutral), and exhaust gas recirculation.

[0052] In this embodiment 2, when the rubber ring 30 fails, the signal transceiver 40 receives the second monitoring signal and transmits it to the electronic control unit. The electronic control unit can determine that the rubber ring 30 has failed based on the second monitoring signal, and further protect the pulley device to avoid the failure of functional parts such as the water pump and generator due to the failure of the rubber ring 30 of the pulley, thus preventing engine damage.

[0053] Furthermore, the electronic control unit includes a displacement monitoring module 70 and a control module 80; the displacement monitoring module 70 is used to process the second monitoring signal to obtain a displacement signal and send the displacement signal to the control module 80; the control module 80 is used to cut off the power input to the pulley device according to the displacement signal.

[0054] In this embodiment 2, the second monitoring signal is an analog signal. The transceiver 40 receives the second monitoring signal and sends it to the displacement monitoring module 70. The displacement monitoring module 70 can perform analog-to-digital conversion on the second monitoring signal and generate a displacement signal, that is, convert the analog signal type of the second monitoring signal into a digital signal type of displacement signal. In this embodiment 2, the transceiver 40 can be a wireless position sensor, and the transceiver 40 and the displacement monitoring module 70 can transmit signals wirelessly. In this embodiment 2, the displacement monitoring module 70 can be integrated with the control module 80, or the two can be set up independently, as long as the displacement monitoring module 70 can transmit displacement signals to the control module 80.

[0055] In this embodiment 2, the control module 80 can cut off the power input to the pulley device based on the displacement signal, thereby achieving protective control of the pulley device. Specifically, the control module 80 can stop injecting fuel by controlling the fuel injector 91 in the engine, thereby stopping the crankshaft from rotating, and thus stopping the pulley from rotating, avoiding the problem of failure of functional parts such as water pumps and generators caused by the pulley rotating in the state of failure of rubber ring 30.

[0056] The fuel injector 91 in the engine atomizes fuel into fine particles and distributes them evenly in the combustion chamber to facilitate uniform mixing of fuel and air, promoting ignition and combustion. The fuel injector 91 includes an orifice-type nozzle, a hydraulic servo system (controlling the piston, controlling the metering orifice, etc.), and a solenoid valve. By controlling the opening and closing of the solenoid valve, the fuel injector 91 can be controlled to inject fuel into the combustion chamber at optimal injection timing, quantity, and rate. The spray characteristics of the fuel injector 91 include atomization particle size, mist distribution, jet direction, range, and diffusion cone angle. These characteristics should meet the requirements of the combustion system to ensure complete mixture formation and combustion, and to achieve high power and thermal efficiency.

[0057] Furthermore, the control module 80 is also used to trigger alarm prompts based on displacement signals. Specifically, the control module 80 can control the instrument panel 92 to display warning information based on the displacement signal; the warning information can be text-based, and the instrument panel 92 can display phrases such as "Pulley rubber ring 30 failed"; the warning information can also be icon-based. The control module 80 can also control the voice safety reminder unit 93 to play safety prompt sounds based on the displacement signal; the voice safety reminder unit 93 can broadcast the voice message "Pulley rubber ring 30 failed" to the user.

[0058] Example 3:

[0059] This embodiment 3 provides a method for detecting pulley failure using the pulley failure monitoring system in embodiment 2, including:

[0060] Step S101: Obtain a feedback signal using the signal transceiver 40 of the monitoring device. When the obtained feedback signal is the second monitoring signal, send the second monitoring signal to the electronic control unit. The second monitoring signal is used to indicate that the outer wheel ring 10 of the pulley device is misaligned with the hub 20.

[0061] Step S102: The electronic control unit receives the second monitoring signal and performs protective control on the pulley device according to the second monitoring signal.

[0062] Furthermore, the protective control of the pulley device based on the second monitoring signal includes:

[0063] The second monitoring signal is processed to obtain the displacement signal;

[0064] The power input to the pulley device is cut off based on the displacement signal.

[0065] Furthermore, the protection control of the pulley device based on the second monitoring signal also includes triggering an alarm based on the displacement signal.

[0066] Furthermore, acquiring feedback signals using the signal transceiver 40 of the monitoring device includes:

[0067] When the signal transceiver 40, the first gap 12 of the first rim 11 and the second gap 22 of the second rim 21 are collinear, the first monitoring signal transmitted by the signal transmitting end of the signal transceiver 40 passes through the first gap 12 and the second gap 22, and the feedback signal received by the signal receiving end of the signal transceiver 40 is empty.

[0068] When the second gap 22 is misaligned with the first gap 12, the first monitoring signal transmitted by the signal transmitting end is reflected by the first rim 11 where the first gap 12 is located to form the second monitoring signal, and the feedback signal received by the signal receiving end is the second monitoring signal.

[0069] In this embodiment 3, when the rubber ring 30 is not faulty, the transceiver 40, the second notch 22 and the first notch 12 are collinear. The transceiver 40 transmits the first monitoring signal. The first monitoring signal passes through the second notch 22 and the first notch 12. The transceiver 40 cannot receive the second monitoring signal. At this time, the feedback signal received by the signal receiving end of the transceiver 40 is empty, indicating that the transceiver 40 has not received the second monitoring signal and the rubber ring 30 is not faulty.

[0070] When the rubber ring 30 fails, the second notch 22 misaligns with the first notch 12. The transceiver 40 transmits a first monitoring signal, which passes through the second notch 22 and is reflected by the first rim 11 to form a second monitoring signal. The feedback signal received by the transceiver 40 is the second monitoring signal, indicating that the rubber ring 30 has failed. The electronic control unit can determine the failure of the rubber ring 30 based on the second monitoring signal. Furthermore, the electronic control unit can perform protective control on the pulley assembly to prevent the failure of functional components such as the water pump and generator due to the pulley rotating in the failed state of the rubber ring 30, thus avoiding engine damage.

[0071] This invention provides a pulley device, a pulley failure monitoring system, and a monitoring method. Through structural design and the addition of a monitoring device (including a position sensor), it continuously monitors whether the rubber ring 30 has failed. When failure occurs, the monitoring device synchronously transmits a displacement signal to the electronic control unit, controls the fuel injector 91 to cut off fuel supply, and notifies the vehicle owner on the instrument panel 92, thus preventing more serious engine failures and losses. The innovative aspects of this invention are as follows: a first notch 12 is added to the first rim 11 of the outer wheel rim 10, and a second notch 22 is added to the second rim 21 of the wheel hub 20. A position sensor with wireless transmission function is rigidly connected to the wheel hub 20. The first notch 12, the second notch 22, and the position sensor are collinear or aligned. Under normal circumstances, the first monitoring signal emitted by the position sensor can pass through the first notch 12 and the second notch 22 without generating a reflected signal. When the rubber ring 30 fails, the first notch 12 and the second notch 22 rotate relative to each other. The first rim 11 next to the first notch 12 of the outer wheel rim 10 blocks the channel of the first monitoring signal and reflects the first monitoring signal. The second monitoring signal formed after reflection can be received by the position sensor. At this time, the position sensor sends the second monitoring signal to the electronic control unit through wireless transmission. The electronic control unit determines that the rubber ring 30 has failed, controls the fuel injector 91 to cut off the fuel supply, and notifies the driver on the instrument panel 92.

[0072] In this invention, a notch is added at the same position on the outer side of the pulley outer rim 10 and the hub 20. A position sensor is installed on the hub 20, and the position sensor has a wireless transmission function. After installation, both the signal transmitting end and the signal receiving end of the position sensor are facing the notch position on the outer rim 10 and the hub 20. When the engine is running, the sensor is rigidly connected to the hub 20, and the two can rotate synchronously. Under normal circumstances, the position sensor cannot receive the reflected signal, so the position sensor will not send a signal to the electronic control unit. When the rubber ring 30 fails, the outer rim 10 and the hub 20 rotate relative to each other, the position of the first notch 12 shifts, and the position sensor can receive the reflected signal. Then, the position sensor sends a second monitoring signal to the displacement monitoring module 70 via wireless transmission. The displacement monitoring module 70 converts the second monitoring signal from analog to digital and obtains a displacement signal, which is then sent to the control module 80. The control module 80 controls the fuel injector 91 to cut off fuel according to the displacement signal and displays a warning message on the instrument panel 92 to alert the driver that the vehicle has a malfunction. Compared with the normal fuel injection strategy, the fuel injector 91 is affected by the rubber ring 30 of the pulley, making the fuel injection control method safer and more reliable, and preventing the fuel injector 91 from continuing to inject fuel when the rubber ring 30 ages.

[0073] The present invention is low in cost, requiring only design changes to the existing pulley, adding a notch, a position sensor, and a mounting base 50. The cost change is not significant, but it can achieve the function of monitoring the status of the rubber ring 30 and prevent the rubber ring 30 from continuing to damage the engine after failure.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pulley device, characterized in that, include: The outer rim (10) has a first rim (11) on its side, and the first rim (11) has a first notch (12). A hub (20) has a second rim (21) on its side, and the second rim (21) has a second notch (22). A rubber ring (30) is disposed between the outer rim (10) and the hub (20), and the first rim (11) and the second rim (21) protrude outward relative to the side of the rubber ring (30); A monitoring device is connected to the wheel hub (20). The monitoring device is equipped with a signal transceiver (40). The signal transceiver (40), the first notch (12), and the second notch (22) are collinear. The transceiver (40) includes a signal transmitting end and a signal receiving end; the signal transmitting end is used to transmit a first monitoring signal. When the transceiver (40), the first gap (12) and the second gap (22) are collinear, the first monitoring signal passes through the first gap (12) and the second gap (22). When the second gap (22) is misaligned with the first gap (12), the first monitoring signal is reflected by the first rim (11) to form a second monitoring signal. The signal receiving end is used to receive the second monitoring signal.

2. The pulley device as described in claim 1, characterized in that, The monitoring device includes a mounting base (50) and a support arm. One end of the support arm is connected to the mounting base (50), and the other end of the support arm is connected to the signal transceiver (40). The mounting base (50) is provided with a mounting hole, which is coaxially arranged with the shaft hole of the hub (20).

3. A pulley failure monitoring system, characterized in that, Includes an electronic control unit and a pulley device as described in any one of claims 1 to 2, wherein the signal transceiver (40) of the pulley device is signal-connected to the electronic control unit; The transceiver (40) is used to send the second monitoring signal to the electronic control unit when the second monitoring signal is received; The electronic control unit is used to perform protective control on the pulley device according to the second monitoring signal sent by the signal transceiver (40).

4. The pulley failure monitoring system as described in claim 3, characterized in that, The electronic control unit includes a displacement monitoring module (70) and a control module (80); The displacement monitoring module (70) is used to process the second monitoring signal to obtain a displacement signal and send the displacement signal to the control module (80). The control module (80) is used to cut off the power input to the pulley device according to the displacement signal.

5. The pulley failure monitoring system as described in claim 4, characterized in that, The control module (80) is also used to trigger an alarm prompt based on the displacement signal.

6. A method for detecting pulley failure using the pulley failure monitoring system as described in any one of claims 3 to 5, characterized in that, include: The signal transceiver (40) of the monitoring device is used to obtain a feedback signal. When the obtained feedback signal is the second monitoring signal, the second monitoring signal is sent to the electronic control unit. The second monitoring signal is used to indicate that the outer wheel ring (10) of the pulley device is misaligned with the hub (20). The electronic control unit receives the second monitoring signal and performs protective control on the pulley device based on the second monitoring signal.

7. The method for monitoring pulley failure as described in claim 6, characterized in that, The protective control of the pulley device based on the second monitoring signal includes: The second monitoring signal is processed to obtain a displacement signal; The power input to the pulley device is cut off based on the displacement signal.

8. The method for monitoring pulley failure as described in claim 7, characterized in that, The protection control of the pulley device based on the second monitoring signal also includes: triggering an alarm prompt based on the displacement signal.

9. The method for monitoring pulley failure as described in claim 6, characterized in that, The acquisition of feedback signals using the signal transceiver (40) of the monitoring device includes: When the first gap (12) of the first rim (11) and the second gap (22) of the second rim (21) are collinear, the first monitoring signal transmitted by the signal transmitting end of the signal transceiver (40) passes through the first gap (12) and the second gap (22), and the feedback signal received by the signal receiving end of the signal transceiver (40) is empty; When the second gap (22) is misaligned with the first gap (12), the first monitoring signal transmitted by the signal transmitting end is reflected by the first rim (11) where the first gap (12) is located to form a second monitoring signal, and the feedback signal received by the signal receiving end is the second monitoring signal.

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