CN111272315A - A vehicle wheel axle stress collection device and collection method - Google Patents

Abstract

The invention relates to the technical field of vehicle measurement, in particular to a vehicle axle stress collecting device and a collecting method. According to the invention, the strain in the total length direction of the wheel shaft is concentrated by a stress concentration method and then collected on the bow-shaped bypass sensor, the rigid beam and the wheel shaft elastic body can be fastened into a rigid connection to form an integral wheel shaft sensing mechanism, the strain on the whole shaft is collected more effectively, so that the strain is increased, the output is stabilized, the sensitivity is improved, and the error caused by unbalance loading can be effectively reduced. The method for collecting the stress of the vehicle wheel axle is convenient to control and high in sensitivity, and can effectively reduce errors caused by unbalance loading.

Description

A vehicle wheel axle stress collection device and collection method

technical field

The invention relates to the technical field of vehicle measurement, in particular to a vehicle wheel axle stress collection device and collection method.

Background technique

When the vehicle is loaded, it is often necessary to test the stress of the vehicle axle to determine the stress state of the wheel and axle under a specific load to determine its reliability. The upper surface of each axle of the vehicle produces a compressive stress, and the following table produces a tensile stress. However, ordinary vehicle stress sensors usually measure a small section of local or point strain, which has low sensitivity, cannot effectively reduce errors caused by eccentric loads, and has a complex structure.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the purpose of the present invention is to provide a vehicle wheel axle stress collection device and collection method. The vehicle wheel axle stress collection device uses the vehicle wheel axle as an elastic body, installs a stress sensor on the wheel axle, and adopts the stress concentration method to The strain in the total length direction of the axle is concentrated and collected on the bow-type bypass sensor, and the bow-type bypass sensor, the rigid beam and the axle elastic body can be fastened into a rigid connection to form an integral axle sensing mechanism, which can collect more effectively. The strain on the whole axis can increase the strain and stabilize the output, and the sensitivity is high, which can effectively reduce the error caused by the eccentric load. The vehicle wheel axle stress collection method is convenient to operate, has high sensitivity, and can effectively reduce errors caused by eccentric loads.

In order to achieve the above object, the present invention adopts the following technical solutions:

A vehicle wheel axle stress collection device, comprising a bracket for connecting with an external wheel axle and a stress sensor arranged on the bracket, the bracket is arranged below or above the wheel axle, the bracket includes a rigid beam and two ends respectively connected to the rigid beam. Two boundary fasteners, the two boundary fasteners are arranged symmetrically about a plane perpendicular to the axial direction of the axle and passing through the center of the axle, the two boundary fasteners are used to connect the rigid beam and the axle, and the two stress sensors are arranged on the side of the rigid beam away from the axle.

Further, the stress sensor includes a sensor body and two connecting pieces respectively connected to both ends of the sensor, and the two connecting pieces are both connected to the rigid beam. The stress sensor is an arcuate bypass sensor or other forms of bypass sensor.

Further, the vehicle wheel axle stress collection device further includes a U-shaped bolt, and the connecting member is fixed to the rigid beam by the U-shaped bolt.

Further, the connector is fastened to the rigid beam by bolts and nuts.

Further, the connector is welded to the rigid beam.

Further, the vehicle wheel axle stress collection device further includes a pre-welded nut, and the connecting member is fixed to the rigid beam through the pre-welded nut.

Further, the bottom end of the connector is provided with a high-strength adhesive layer, and the connector is connected to the rigid beam through the high-strength adhesive layer.

Further, the rigid beam is parallel to the central axis of the wheel axle, the two boundary fasteners are both column-shaped, and the two boundary fasteners are both perpendicular to the central axis of the wheel axle; one end of the boundary fastener is connected to the rigid The beam is connected, and the other end of the boundary fastener is connected to the axle.

Further, the stress sensor is provided with a wireless signal transmitting module, and the vehicle wheel axle stress collecting device is further provided with a receiving and display terminal for receiving signals sent by the wireless signal transmitting module.

Further, the two boundary fasteners are arranged above the wheel axle, the rigid beam is arranged above the boundary fastener, and the stress sensor is arranged above the rigid beam.

Further, the two boundary fasteners are arranged below the wheel axle, the rigid beam is arranged below the boundary fastener, and the stress sensor is arranged below the rigid beam.

The present invention also provides a stress collection method for a vehicle wheel axle, the stress collection method adopts the above stress collection device, and the stress collection method comprises the following steps: using the wheel axle as an elastic body, installing the stress collection device on the upper surface or the lower surface of the wheel axle to form a Integral axle sensing mechanism; the stress sensor sends the stress sensing signal to the receiving display terminal.

Further, the bow-type bypass sensor sends the stress induction signal to the receiving display terminal through the wireless transmitting module.

Beneficial effects of the present invention: the present invention uses the vehicle axle as the elastic body, installs the stress sensor on the axle, and collects the strain in the overall length direction of the axle by adopting the stress concentration method on the bow-shaped bypass sensor, so that the bow-shaped bypass sensor can be collected. The bypass sensor, the rigid beam and the axle elastic body are fastened into a rigid connection to form an integral axle sensing mechanism, which can collect the strain on the entire axle more effectively, so as to increase the strain, stabilize the output, and improve the sensitivity. It can effectively reduce the error caused by eccentric load. Compared with the common vehicle stress sensor, which is obtained by a small section of local or point strain, the vehicle wheel axle stress collection device of the present invention relies on each wheel axle of the vehicle as an elastic body to collect all or local strain on the center of the wheel axis symmetry, and the wheel axle sensing mechanism Easier to standardize and more practical. The vehicle wheel axle stress collection method of the present invention is easy to operate, can effectively measure the collected strain of the wheel axle, has high sensitivity, and can effectively reduce errors caused by eccentric loads.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of Example 1. FIG.

FIG. 2 is a schematic three-dimensional structure diagram of Embodiment 2. FIG.

Description of reference numbers:

11. Stress sensor; 12. Axle sensing mechanism; 13. U-bolt; 14. Welded part; 15. Pre-welded nut; 16. High-strength adhesive layer; 17. Rigid beam; 18. Boundary fastener; 19. Axle; 20. Connector.

Detailed ways

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the embodiments and the accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

Example 1

As shown in FIG. 1, a vehicle wheel axle stress collection device includes a bracket for connecting with an external wheel axle 19 and a stress sensor 11 arranged on the bracket, the bracket is arranged below or above the wheel axle 19, and the bracket includes a rigid The beam 17 and the two boundary fasteners 18 connected to the two ends of the rigid beam 17 respectively, the two boundary fasteners 18 are arranged symmetrically about a plane perpendicular to the axial direction of the axle 19 and passing through the center of the axle 19, and the two boundary fasteners 18 is used to connect the rigid beam 17 and the axle 19 , and the two stress sensors 11 are arranged on the side of the rigid beam 17 away from the axle 19 .

Further, the stress sensor 11 includes a sensor body and two connecting pieces 20 respectively connected to both ends of the sensor, and the two connecting pieces 20 are both connected to the rigid beam 17 . The stress sensor 11 is an arcuate bypass sensor and can also be other types of bypass sensors.

When the vehicle is loaded, the upper surface of each axle 19 of the vehicle produces a compressive stress, and the lower table produces a tensile stress. In the present invention, the vehicle wheel axle 19 is used as the elastic body, and the stress sensor 11 is installed on the upper surface or the lower surface of the wheel axle 19. The stress sensor 11 is preferably an arcuate bypass sensor, that is, an arcuate bending beam bypass sensor; The stress concentration method concentrates the strain in the overall length direction of the axle 19 and collects it on the bow-type bypass sensor, which can fasten the bow-type bypass sensor, the rigid beam 17 and the elastic body of the axle 19 into a rigid connection to form an integral axle sensor. The mechanism 12 collects the strain on the entire axis more effectively, so as to increase the strain, stabilize the output, and improve the sensitivity. Compared with the common vehicle stress sensor 11 which obtains a small segment of local or point strain, the vehicle wheel axle stress collecting device of the present invention relies on each wheel axle 19 of the automobile as an elastic body to collect the total or local strain on the center of symmetry of the wheel axle 19, so that Adjust the strain size according to the different axle types and axle sizes on the same vehicle, so that the axle sensing mechanism 12 can be more easily standardized, whether it is a whole axle or a section of axle centered on the symmetrical center of the axle 19, by taking different lengths The bearing shaft, direction shaft, and shaft group on a car can be adjusted, and the strain between them is consistent. In this way, the axle sensing mechanism 12 is standardized by electronic adjustment for the axles 19 of different sizes of the same vehicle.

Further, the vehicle wheel axle stress collection device further includes a U-bolt 13 , and the connecting member 20 is fixed to the rigid beam 17 through the U-bolt 13 . The connecting piece 20 is fastened to the rigid beam 17 by bolts and nuts. By using U-shaped bolts 13, the stress sensor 11 can be fastened to the rigid beam 17, and the two connectors 20 are symmetrically connected to the rigid beam 17, so that a section of the wheel shaft 19 on any length of the wheel shaft 19 with the center of the symmetry center as the center can be strained through the The high-strength rigid beam 17 is concentrated on the bow-type bypass sensor, and the stress collected on the entire axle 19 makes the bow-type bypass sensor have a large enough strain, so that the output sensitivity of the bow-type bypass sensor is also large enough. The error caused by the eccentric load can be reduced, the connection between the stress sensor 11 and the rigid beam 17 is stable during measurement, the measurement accuracy is high, and the installation is convenient. Further, the connecting member 20 can also be directly welded to the rigid beam 17 . The connector 20 can be directly welded to the rigid beam 17. During welding, the ends of the two connectors 20 of the stress sensor 11 away from the sensor body are both soldered to the rigid beam 17 to form a welded portion 14, so that the stress sensor 11 is firmly connected to the rigid beam 17. . U-bolts 13 and/or direct welding can be used according to the actual situation.

Further, the rigid beam 17 is parallel to the central axis of the axle 19, the two boundary fasteners 18 are both cylindrical, and the two boundary fasteners 18 are both perpendicular to the central axis of the axle 19; the boundary fastening One end of the piece 18 is connected to the rigid beam 17 , and the other end of the boundary fastener 18 is connected to the axle 19 . Due to the arrangement of the above structure, the vehicle axle stress collecting device relies on each axle 19 of the vehicle as an elastic body to collect all or part of the strain on the center of symmetry of the axle 19, so that different axle types and axle sizes on the same vehicle can Adjust the size of the strain to make the axle sensing mechanism 12 easier to standardize; by setting the boundary fasteners 18 to connect to different positions of the axle 19, so that the symmetrical center of the axle 19 is the center and the strain on any symmetrical length on both sides is concentrated on the side of the bow. Road sensor, strong practicability and high sensitivity. Whether it is the entire axle of the wheel or a section of the axle with the center of symmetry at the midpoint, by taking different lengths, the strain between the bearing axle, direction axle, and axle group on a vehicle can be adjusted to maintain consistency.

Further, the stress sensor 11 is provided with a wireless signal transmitting module, and the vehicle axle stress collecting device is further provided with a receiving display terminal, which is provided with a wireless receiving module for receiving signals sent by the wireless signal transmitting module. The signal from the stress collection device can be either an analog output or a digital output. The wireless transmitting module can send the stress collection and detection information to the receiving display terminal, which is convenient for control and operation, and can reduce the messy wires, which is convenient to use and has strong practicability. The vehicle wheel axle stress collecting device can also transmit signals to the receiving display terminal in a wired transmission manner as required.

The vehicle wheel axle stress collection method of the present embodiment adopts the above-mentioned stress collection device and includes the following steps: using the wheel axle 19 as an elastic body, the stress collection device is installed on the upper surface or the lower surface of the wheel axle 19 to form an integral wheel axle sensing mechanism 12 ; The stress sensor 11 sends the stress sensing signal to the receiving display terminal.

Further, the stress sensor 11 sends the stress sensing signal to the receiving display terminal through the wireless transmitting module.

Further, the two boundary fasteners 18 are arranged above the wheel axle 19 , the rigid beam 17 is arranged above the boundary fastener 18 , and the stress sensor 11 is arranged above the rigid beam 17 . The two boundary fasteners 18 can also be arranged below the wheel axle 19 , the rigid beam 17 is arranged below the boundary fastener 18 , and the stress sensor 11 is arranged below the rigid beam 17 . When the vehicle bears a load, a compressive stress is generated on the upper surface of each axle 19 of the vehicle, and a tensile stress is generated in the following table, and the vehicle axle stress collection device can be used as required. The present invention collects and concentrates the strain on the vehicle axle 19 to the arcuate bypass sensor through the rigid boundary condition and the flexible beam sensor principle, so that the output sensitivity of the axle 19 stress collection device is significantly higher than that of the ordinary sensor.

Example 2

As shown in FIG. 2 , the vehicle wheel axle stress collection device further includes a pre-welded nut 15 , and the connecting member 20 is fixed to the rigid beam 17 through the pre-welded nut 15 . Further, the bottom end of the connecting member 20 is provided with a high-strength adhesive layer, and the connecting member 20 is connected to the rigid beam 17 through the high-strength adhesive layer. Pre-welded nuts 15 and/or high-strength adhesive layers may be used according to actual conditions. Due to the arrangement of the above structure, the stress sensor 11 can be fastened to the rigid beam 17, the structure is simple and compact, and the practicability is strong.

The rest of the content of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

All the technical features in this embodiment can be freely combined according to actual needs.

The above-mentioned embodiment is a preferred implementation scheme of the present invention. In addition, the present invention can also be implemented in other ways, and any obvious replacements are within the protection scope of the present invention without departing from the concept of the technical solution.

Claims (10)

1. A vehicle wheel axle stress collection device, characterized in that: it comprises a bracket for connecting with an external wheel axle and a stress sensor arranged on the bracket, the bracket is arranged below or above the wheel axle, and the bracket comprises a rigid beam and a respectively Two boundary fasteners connected to both ends of the rigid beam, the two boundary fasteners are arranged symmetrically about a plane perpendicular to the axial direction of the axle and passing through the center of the axle, and the two boundary fasteners are used to connect the rigid beam and the axle. One of the stress sensors is arranged on the side of the rigid beam away from the wheel axle. 2 . The vehicle wheel axle stress collection device according to claim 1 , wherein the stress sensor comprises a sensor body and two connectors respectively connected to both ends of the sensor, and the two connectors are both connected to the rigid beam. 3 . 3 . The vehicle wheel axle stress collection device according to claim 2 , wherein the vehicle wheel axle stress collection device further comprises U-shaped bolts, and the connecting piece is fixed to the rigid beam through the U-shaped bolts. 4 . 4. A vehicle wheel axle stress collection device according to claim 2, wherein the connecting piece is welded to the rigid beam. 5 . The vehicle wheel axle stress collection device according to claim 2 , wherein the connecting piece is fastened to the rigid beam by bolts and nuts. 6 . 6 . The vehicle wheel axle stress collection device according to claim 2 , wherein the bottom end of the connecting piece is provided with a high-strength adhesive layer, and the connecting piece is connected to the vehicle through the high-strength adhesive layer. 7 . rigid beam. 7. A vehicle wheel axle stress collection device according to claim 1, characterized in that: the rigid beam is parallel to the central axis of the wheel axle; the two boundary fasteners are both cylindrical, and the two boundary fasteners are are perpendicular to the central axis of the wheel axle; one end of the boundary fastener is connected to the rigid beam, and the other end of the boundary fastener is connected to the wheel axle. 8 . The vehicle wheel axle stress collection device according to claim 1 , wherein the stress sensor is provided with a wireless signal transmission module, and the vehicle wheel axle stress collection device is further provided with a receiving and display terminal, and the receiving and displaying The terminal is provided with a wireless receiving module for receiving the signal sent by the wireless signal transmitting module. 9. A method for collecting stress of a vehicle wheel axle, characterized in that: using the stress collecting device according to any one of claims 1-8, the stress collecting method comprises the steps of: installing the stress collecting device on the upper surface or the lower surface of the wheel axle The surface forms an integral wheel axle sensing mechanism; the stress sensor sends the stress sensing signal to the receiving display terminal. 10 . The method for collecting wheel axle stress of a vehicle according to claim 9 , wherein the stress sensor sends a stress sensing signal to a receiving display terminal through a wireless transmitting module. 11 .

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