Tire monitoring device

Abstract

The utility model discloses a tire monitoring device which comprises a sensor module and a support capable of being connected outside a rim in a sleeved mode, the sensor module is located on the support, and an installation block with the dead weight larger than that of the sensor module is arranged on the support. According to the utility model, the sensor module is static relative to the frame, the tire moves relative to the sensor module, the measurement of all sites of the tire can be realized, the monitoring accuracy is improved, the sensor module is fixed relative to the frame position or swings in a small range, and the stability of signal transmission between the sensor module and a signal receiver on the frame can be improved.

Description

Technical Field

[0001] This utility model relates to a vehicle-mounted signal device, and more particularly to a tire monitoring device. Background Technology

[0002] As the lifting capacity of ultra-large tonnage wheeled cranes increases, the overall weight of the vehicles also increases. To ensure the crane can move normally, larger tonnage wheeled cranes have more axles and a corresponding increase in the number of tires. For example, the XCMG XCA4000 wheeled crane weighs over 300 tons during heavy-duty relocation and has 11 axles and 22 tires that share the load during vehicle movement.

[0003] Ultra-large tonnage wheeled cranes are mainly used for wind turbine installation and are suitable for mountainous wind farms. Mountainous wind farms have rugged, uneven roads with many curves and slopes. When traveling on these harsh conditions, especially during heavy-load relocation, the tires of ultra-large tonnage wheeled cranes already bear a very heavy load. If, under these conditions, the crane is subjected to certain special operating conditions that cause axle load shifting or some tires to become suspended, the load on the remaining tires will increase dramatically, increasing the risk of tire blowouts and jeopardizing the crane's operational safety.

[0004] Utility model patent application CN222004881U discloses a differential pressure sensor, a tire pressure monitoring device, and a vehicle. The differential pressure sensor is installed inside the tire, and its housing contains a balancing chamber. This balancing chamber is connected to the tire's interior via a small-diameter, curved air tube. When the vehicle is driving normally and the tire pressure is normal, the pressure in the balancing chamber tends to balance with the tire pressure. In the event of a tire blowout, the pressure change rate in the balancing chamber is slower than the pressure change rate in the tire, creating an instantaneous pressure difference between the balancing chamber and the external environment. The differential pressure sensor generates a differential pressure signal reflecting the tire condition. However, this design places the sensor in a fixed position within the tire, allowing it to rotate with the tire during driving. It can only monitor pressure changes at a fixed location on the tire. This is problematic for cranes with large tires, and the single monitoring position results in low sensitivity and accuracy. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a tire monitoring device that improves monitoring accuracy.

[0006] Technical solution: The tire monitoring device of this utility model includes a sensor module and a bracket that can be fitted onto the outside of the wheel rim. The sensor module is located on the bracket, and the bracket is provided with a mounting block whose weight is greater than that of the sensor module.

[0007] Preferably, the bracket is formed by splicing together at least two arc-shaped lobes. Each arc-shaped lobe includes a housing, a roller inside the housing, and a retainer for restraining the roller. The sensor module is connected to the outside of the housing.

[0008] Preferably, the cage has a through hole for the roller to pass through, and the diameter of the through hole is smaller than the diameter of the roller.

[0009] Preferably, the end of the outer shell is provided with a connector for connecting two adjacent arc-shaped petals, and the size of the connector is increased to form the mounting block.

[0010] Preferably, the retainer is connected to the support on both sides.

[0011] Preferably, the sensor module includes a differential pressure sensor and a temperature sensor, both of which are connected to the control module.

[0012] Preferably, the sensor module further includes an accelerometer for controlling the activation of the differential pressure sensor and the temperature sensor, and the accelerometer is connected to the control module.

[0013] Preferably, the control module and the power supply module are connected.

[0014] Beneficial effects: Compared with the prior art, this utility model has the following advantages: 1. Ensures monitoring accuracy and stability: The tire moves relative to the sensor module, realizing the measurement of all tire positions, improving monitoring accuracy. The sensor module is fixed in position relative to the frame or swings within a small range, which helps to improve the stability of signal transmission between the sensor module and the signal receiver on the frame; 2. Simple structure and easy installation; 3. Reduces false alarms: Multi-parameter comprehensive judgment reduces false alarms caused by single-parameter evaluation; 4. Reduces the energy consumption of the sensor module: Signal collection begins when the vehicle starts moving, eliminating the need for continuous high-frequency signal collection by the sensor, reducing the energy consumption of the sensor module and extending the service life of the system. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the support structure for a tire monitoring device;

[0016] Figure 2 A schematic diagram of the tire monitoring device and the rim assembly state;

[0017] Figure 3 for Figure 2 The right view in the middle;

[0018] Figure 4 This is the main view of the sensor module structure;

[0019] Figure 5 This is a side view of the sensor module structure. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 , Figure 2 As shown, the tire pressure monitoring device includes a bracket and a sensor module 9. The sensor module 9 is located on the bracket and is fixedly connected to it. The main body of the bracket is ring-shaped and fits around the outside of the wheel rim, allowing it to slide relative to the rim. When the wheel rim rotates, the bracket and sensor module can remain stationary relative to the vehicle body, enabling measurement of all tire pressure points and improving monitoring accuracy. Simultaneously, the sensor module and the signal receiver mounted on the vehicle frame are relatively fixed in position to enhance the stability of the tire pressure monitoring system's signal transmission.

[0022] The sensor module 9 has a certain weight. After the bracket is connected to the rim, the sensor module 9 will slide / rotate to the bottom of the rim 8. The tire pressure at the bottom of the rim 8 is relatively high, which may cause measurement errors. In addition, the sensor module 9 is at risk of being crushed and damaged. To solve this problem, the housing 1 is provided with a mounting block 5. The mounting block 5 acts as a counterweight and its weight is greater than that of the sensor module 9. The mounting block 5 is driven by gravity and rotates to the bottom of the rim 8 to raise the height of the sensor module 9. Multiple sets of sensor modules 9 can be set.

[0023] The bracket is formed by splicing together at least two arc-shaped lobes. Each arc-shaped lobe includes at least an outer shell 1. The outer side of the outer shell 1 is used to install the sensor module 9, and the inner layer is used to install a mechanism to reduce friction. For example, the inner side of the outer shell 1 is provided with several rollers 2 and a retainer 3 to constrain the rollers 2. The retainer 3 is arranged concentrically with the outer shell 1 and is connected to the outer shell 1 on both sides by several support rods or connecting pieces (not shown). The inner diameter of the retainer 3 is larger than that of the wheel rim. The retainer 3 is provided with several through holes. The diameter of the through holes is smaller than that of the rollers 2. Through the through holes, the rollers 2 partially pass through the retainer 3 and contact the wheel rim, so that the bracket can slide relative to the wheel rim, reduce friction, and prevent the wheel rim from driving the outer shell 1 to rotate and damage the sensor module 9 when the vehicle speed increases to a certain value.

[0024] The outer casing 1 has connectors 4 at both ends, which are distributed along the axial direction of the outer casing 1. Each connector 4 has mounting holes, and adjacent arc-shaped lobes are connected through the connectors 4. The connectors 4 are fixed together by bolts 6 and nuts 7 to ensure reliable installation. To simplify the structure, the mounting block 5 can be directly formed by deforming the connectors 4. For example, the mounting block 5 can be formed by increasing the size of the connectors 4, increasing the diameter of the mounting holes, and increasing the diameter and size of the bolts 6 and nuts 7.

[0025] like Figures 3 to 5The sensor module 9 includes a differential pressure sensor 10 and a temperature sensor 11. Both the differential pressure sensor 10 and the temperature sensor 11 are connected to the control module 13. When the vehicle travels at low speed over an obstacle, the internal pressure of the tire will change instantaneously. However, if the tire temperature is within a safe range and the vehicle speed is slow, the risk of tire blowout is small. But the differential pressure sensor 10 will send an alarm signal, causing a false alarm. By setting both the differential pressure sensor and the temperature sensor 11 simultaneously and taking both parameters into account, when both parameters are abnormal, the control module 13 sends an alarm signal to the driver's cab to alert the driver that there is a risk of tire blowout, thereby improving the detection accuracy of the tire monitoring system.

[0026] The differential pressure sensor 10 has the same structure as the CN222004881U solution, including a balance chamber and an air pipe 15 connecting the balance chamber and the inside of the tire. The air pipe 15 is a multi-section bent pipe with a small inner diameter. When the vehicle is driving stably, the pressure inside the balance chamber is almost equal to the pressure inside the tire. In an emergency, the pressure inside the tire changes faster than the pressure inside the balance chamber, forming a pressure difference and feeding back a pressure signal.

[0027] The sensor module 9 also includes an acceleration sensor 12, which is connected to the control module 13. The acceleration sensor 12 controls the activation of the differential pressure sensor 10 and the temperature sensor 11. That is, the control module 13 will only issue a control command to activate the differential pressure sensor 10 and the temperature sensor 11 after the acceleration sensor 12 detects a signal and receives this signal. This control logic ensures that the tire monitoring system only intervenes when the vehicle starts moving, reducing the energy consumption of the tire monitoring system and extending its service life. The control module 13 is connected to the power supply module 14.

Claims

1. A tire monitoring device, characterized in that, Includes a sensor module (9) and a bracket that can be fitted onto the outside of the wheel rim. The sensor module (9) is located on the bracket, and the bracket is provided with a mounting block (5) whose weight is greater than that of the sensor module.

2. The tire monitoring device according to claim 1, characterized in that, The bracket is formed by splicing arc-shaped petals. Each arc-shaped petal includes a housing (1), a roller (2) inside the housing, and a retainer (3) for restraining the roller (2). The sensor module (9) is connected to the housing (1).

3. The tire monitoring device according to claim 2, characterized in that, The cage (3) is provided with a through hole for the roller (2) to pass through, and the diameter of the through hole is smaller than the diameter of the roller (2).

4. The tire monitoring device according to claim 2, characterized in that, The end of the outer shell (1) is provided with a connector (4) for connecting two adjacent arc-shaped lobes, and the size of the connector (4) is increased to form the mounting block (5).

5. The tire monitoring device according to claim 2, characterized in that, The retainer (3) is connected to the outer shell (1) on both sides.

6. The tire monitoring device according to any one of claims 1 to 5, characterized in that, The sensor module (9) includes a differential pressure sensor (10) and a temperature sensor (11), both of which are connected to the control module (13).

7. The tire monitoring device according to claim 6, characterized in that, The sensor module (9) also includes an acceleration sensor (12) for controlling the opening of the differential pressure sensor (10) and the temperature sensor (11), and the acceleration sensor (12) is connected to the control module (13).

8. The tire monitoring device according to claim 6, characterized in that, The control module (13) and the power supply module (14) are connected.

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