CN213693372U

CN213693372U - Power supply unit and wheel pair sensing system

Info

Publication number: CN213693372U
Application number: CN202023224044.2U
Authority: CN
Inventors: 孙亚新; 李岩峰; 田华; 赵峥
Original assignee: BEIJING JYD DIGITAL TECHNOLOGY CO LTD
Current assignee: BEIJING JYD DIGITAL TECHNOLOGY CO LTD
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-07-13
Anticipated expiration: 2030-12-28

Abstract

The utility model provides a pair of power supply unit and wheel pair sensing system relates to train monitoring facilities technical field to solve the problem that train fault monitoring equipment needs external power source and lead wire to a certain extent. The utility model provides a power supply unit for a wheel set sensing system, which comprises a rotating component and a positioning component; the rotating member includes a rotating member body and a magnet, and the positioning member includes a positioning member body and a coil; the magnet is arranged on the rotating component body, and the coil is arranged on the positioning component body and is opposite to the movement track of the magnet; the rotating member body comprises a connecting shaft part, one end of the connecting shaft part is rotatably connected with the positioning member body, the other end of the connecting shaft part is connected with a wheel shaft of a wheel pair mechanism in the wheel pair sensing system, and when the wheel shaft rotates, the rotating member body can rotate relative to the positioning member body, so that the magnet can rotate relative to the coil and generate current.

Description

Power supply unit and wheel pair sensing system

Technical Field

The utility model belongs to the technical field of train monitoring facilities technique and specifically relates to a power supply unit and wheel pair sensing system are related to.

Background

Railways are important infrastructure, and good operation of trains is the key to ensuring safe operation of railways. These, however, must rely on train fault diagnosis techniques.

Because the train wheel is one of the most important key parts in the mechanical part of the train and is also a part with multiple mechanical faults of the railway locomotive, the monitoring, the maintenance and the repair of the train wheel are particularly important in the overhaul and the maintenance of the railway locomotive.

At present, fault monitoring of train wheels includes vibration state monitoring, noise state monitoring, temperature state monitoring, nondestructive inspection state monitoring and the like, and the monitoring means is mostly realized by a sensor. Whether the train wheel has faults or not is reflected through monitoring the audio frequency, the axle temperature and the like when the train wheel rotates.

In the existing fault monitoring device, the sensor and other structures are mostly required to be powered through an external power supply and a lead wire arrangement mode, so that the monitoring function is realized, but the external power supply and the lead wire make the combination of the whole device and the train wheels more difficult, and the wiring cost is high.

Therefore, it is desirable to provide a power supply device and a wheel set sensing system, which solve the problems in the prior art to some extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a power supply unit and wheel pair sensing system to solve the problem that train fault monitoring equipment needs external power supply to a certain extent.

The utility model provides a power supply unit, which is used for a wheel set sensing system and comprises a rotating component and a positioning component; the rotating member includes a rotating member body and a magnet, and the positioning member includes a positioning member body and a coil; the magnet is arranged on the rotating component body, and the coil is arranged on the positioning component body and corresponds to the movement track of the magnet; the rotating member body comprises a connecting shaft part, one end of the connecting shaft part is rotatably connected with the positioning member body, the other end of the connecting shaft part is connected with a wheel shaft of a wheel set mechanism in the wheel set sensing system, and when the wheel shaft rotates, the rotating member body can rotate relative to the positioning member body, so that the magnet can rotate relative to the coil and generate current.

Wherein the rotating member body further comprises a mounting portion; the installation department is discoid, the axis of connecting the axial region with the centre of a circle collineation of installation department.

Specifically, the positioning member further comprises a first bearing; the connecting shaft part is connected with the inner ring of the bearing, and the outer ring of the bearing is connected with the positioning member body.

Further, the number of the magnets is at least one, and the number of the coils is at least one.

Furthermore, a positioning groove corresponding to the magnet is formed on the mounting part; the magnet can be embedded in the positioning groove; mounting grooves which are in one-to-one correspondence with the coils are formed in one side, facing the magnet, of the positioning component body, and positioning columns are formed in the mounting grooves; the coil is sleeved on the positioning column and is positioned in the mounting groove.

The power supply device provided by the utility model also comprises a first end cover; the first end cover is buckled on one side of the positioning component body, which is provided with the coil, a first accommodating cavity is formed between the first end cover and the positioning component body, and the rotating component and the coil are arranged in the first accommodating cavity; one end of the connecting shaft part, which deviates from the magnet, penetrates through the first end cover and is rotatably connected with the first end cover.

Specifically, the power supply device provided by the utility model also comprises a second bearing; the outer ring of the second bearing is connected with the first end cover, and the inner ring of the second bearing is connected with one end, away from the magnet, of the connecting shaft part, so that the rotating member body can rotate relative to the first end cover.

Further, the power supply device provided by the utility model also comprises a second end cover; the second end cover is buckled on one side of the positioning component body, which is far away from the coil, and a second accommodating cavity is formed and used for accommodating a sensing device in the wheel pair sensing system.

Compared with the prior art, the utility model provides a power supply unit has following advantage:

the utility model provides a power supply unit for a wheel set sensing system, which comprises a rotating component and a positioning component; the rotating member includes a rotating member body and a magnet, and the positioning member includes a positioning member body and a coil; the magnet is arranged on the rotating component body, and the coil is arranged on the positioning component body and corresponds to the movement track of the magnet; the rotating member body comprises a connecting shaft part, one end of the connecting shaft part is rotatably connected with the positioning member body, the other end of the connecting shaft part is connected with a wheel shaft of a wheel pair mechanism in the wheel pair sensing system, and when the wheel shaft rotates, the rotating member body can rotate relative to the positioning member body, so that the magnet can rotate relative to the coil and generate current.

From this analysis, it can be seen that the magnet is disposed on the rotating member body, the coil is disposed on the positioning member body, and one end of the connecting shaft portion of the rotating member body is rotatably connected to the positioning member body, and the other end is connected to the wheel shaft of the wheel-set mechanism in the wheel-set sensing system. When the wheel axle rotates, the rotating component body can be driven to rotate relative to the positioning component body, so that the magnet can rotate relative to the coil, and current is generated. Because the rotating member body is directly connected with the wheel shaft and generates electric power through the rotation of the wheel shaft, the problem that the train fault monitoring equipment needs an external power supply can be solved.

In addition, the utility model also provides a wheel pair sensing system, which comprises the power supply device, the sensing device and the wheel pair mechanism; the power supply device is connected with the sensing device to supply power to the sensing device; the wheel set mechanism comprises a shaft end pressing plate and a wheel shaft, the wheel shaft is connected with the shaft end pressing plate, one end, away from the positioning component, of the rotating component body is connected with the shaft end pressing plate, and the wheel shaft can drive the shaft end pressing plate to rotate so as to drive the rotating component body to rotate.

Wherein the sensing device comprises a circuit board, a processor, a plurality of sensors and an energy component; the energy source assembly is used for storing and transmitting electric power, the circuit board is used for mounting the sensors and the processor, and the sensors are used for monitoring the shaft temperature and vibration of the wheel shaft.

The power supply device is connected with the wheel set mechanism, and then the sensing device is electrically connected with the power supply device, so that the magnet in the power supply device can be driven to rotate relative to the coil through the rotation of the wheel shaft in the wheel set mechanism, and further the sensing device can be supplied with electric power, so that the sensor in the sensing device can monitor the state of the wheel set in real time, the installation complexity of a wheel set sensing system is reduced, and the problem that train fault monitoring equipment needs an external power supply is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first viewing angle of a power supply device according to an embodiment of the present invention;

fig. 2 is a schematic split view of a power supply device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a second viewing angle of the power supply device according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first accommodating cavity in a power supply device according to an embodiment of the present invention;

fig. 5 is a schematic view of an internal structure of a positioning member body in a power supply device according to an embodiment of the present invention.

In the figure: 1-a rotating member body; 101-a connecting shaft portion; 102-a mounting portion; 1021-a positioning slot; 2-a positioning member body; 201-a first bearing; 202-mounting grooves; 203-positioning columns; 3-a magnet; 4-a coil; 5-a first end cap; 6-a second bearing; 7-a second end cap; 8-dust cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are only used for convenience of description and simplification of the description, but do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present application, it should also be noted that, unless explicitly stated or limited otherwise, the terms "disposed," "positioned," "communicated," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, the examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. Further, while the examples described herein have a variety of configurations, other configurations are possible, as will be apparent after understanding the disclosure of the present application. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

Fig. 1 is a schematic structural diagram of a first viewing angle of a power supply device according to an embodiment of the present invention; fig. 2 is a schematic diagram illustrating a split of the power supply apparatus according to an embodiment of the present invention.

As shown in fig. 1 and fig. 2, the present invention provides a power supply device for a wheel set sensing system, which includes a rotating member and a positioning member; the rotating member comprises a rotating member body 1 and a magnet 3, and the positioning member comprises a positioning member body 2 and a coil 4; the magnet 3 is arranged on the rotating component body 1, the coil 4 is arranged on the positioning component body 2 and is opposite to the magnet 3; the rotating member body 1 includes a connecting shaft portion 101, one end of the connecting shaft portion 101 is rotatably connected to the positioning member body 2, and the other end is connected to a wheel shaft of a wheel pair mechanism in the wheel pair sensor system, and when the wheel shaft rotates, the rotating member body 1 can rotate relative to the positioning member body 2, so that the magnet 3 can rotate relative to the coil 4 and generate a current.

the utility model provides a power supply unit, through setting up magnet 3 on rotating member body 1, coil 4 sets up on locating component body 2 to the one end of the connecting shaft portion 101 that makes rotating member body 1 rotates with locating component body 2 to be connected, and the other end is connected with the shaft of wheel pair mechanism among the wheel pair sensing system.

When the wheel axle rotates, the rotating member body 1 can be driven to rotate relative to the positioning member body 2, so that the magnet 3 can rotate relative to the coil 4, and current is generated. Because the rotating member body 1 is directly connected with the wheel axle and generates electric power through the rotation of the wheel axle, the problem that the train fault monitoring equipment needs an external power supply can be solved.

In addition, since the connecting shaft part 101 in the present application can be directly connected with the wheel axle, an end cover pressing plate in the wheel set mechanism can be removed, so that the overall size and the occupied space after the overall device is arranged can be reduced.

The connection of connecting axial region 101 and shaft in this application can be through the shaft coupling or directly process the screw on connecting axial region 101 to set up the bolt on the shaft, through threaded connection, realize the installation between power supply unit and the wheel pair mechanism.

Make and connect axial region 101 and shaft lug connection only for realizing the utility model discloses technical scheme's one of them embodiment also can be through setting up the axle head clamp plate at the epaxial axle to make and connect axial region 101 and be connected with the axle head clamp plate, can realize transmitting the rotation of shaft to the purpose on connecting axial region 101 equally.

It should be added here that the magnet 3 and the coil 4 have a certain arrangement interval in the present application, so that the magnet 3 can be ensured to rotate smoothly relative to the coil 4 to a certain extent.

As shown in fig. 1 and fig. 2, the rotating member body 1 further includes a mounting portion 102; the mounting portion 102 is disk-shaped, and the axis connecting the shaft portion 101 is collinear with the center of the mounting portion 102.

Through being discoid with the setting of the installation department 102 of rotating member body 1 in this application to the axis of connecting the axial region 101 and the centre of a circle collineation of installation department 102 make installation department 102 can use the axis of connecting the axial region 101 to rotate as the axis of rotation, and then can guarantee to a certain extent that rotating member body 1 can rotate steadily.

Further, the disk-shaped mounting portion 102 can make the arrangement of the magnets 3 more uniform, thereby improving the stable output of the current to some extent.

Fig. 3 is a schematic structural diagram of a second viewing angle of the power supply device according to the embodiment of the present invention; fig. 4 is a schematic structural diagram of a first accommodating cavity in a power supply device according to an embodiment of the present invention.

As shown in fig. 1 to 4, the positioning member further includes a first bearing 201; the connecting shaft portion 101 is connected to an inner ring of a bearing, and an outer ring of the bearing is connected to the positioning member body 2.

By providing the first bearing 201, the rotary member body 1 can be quickly connected to the positioning member body 2 and can rotate relative to the positioning member body 2.

The axis of the axis locating member of the first bearing 201 in this application is collinear, and is collinear with the axis of the connecting shaft portion 101, so that the axis of the rotating member body 1 is collinear with the axis of the locating member body 2, and the stability of the whole device is ensured to a certain extent.

Specifically, as shown in fig. 1 to 4, the number of the magnets 3 and the number of the coils 4 are plural; the plurality of magnets 3 are arranged along the circumferential direction of the mounting portion 102, and the coil 4 is arranged along the circumferential direction of the positioning member body 2.

The magnets 3 in the present application are circular and arranged along the circumferential direction of the mounting portion 102, and preferably, the number of the coils 4 in the present application is 12, and the number of the magnets 3 is 16, so that the power generation efficiency can be improved to a certain extent.

It should be added here that both the magnet 3 and the coil 4 in the present application can be connected to the mounting portion 102 and the positioning member body 2 by means of adhesion.

Further, as shown in fig. 1 to 5, positioning grooves 1021 corresponding to the magnets 3 are formed on the mounting portion 102; the magnet 3 can be embedded in the positioning groove 1021; one side of the positioning member body 2 facing the magnet 3 is provided with mounting grooves 202 corresponding to the coils 4 one to one, positioning posts 203 are formed in the mounting grooves 202, and the coils 4 are sleeved on the positioning posts 203 and located in the mounting grooves 202.

The magnet 3 can be stably attached to the rotary member body 1 by the positioning groove 1021 formed in the attachment portion 102. The coil 4 is stably connected with the positioning member body 2 by forming the mounting groove 202 in the positioning member body 2 and forming the positioning column 203 in the mounting groove 202, so that the coil 4 is embedded in the mounting groove 202 and sleeved on the positioning column 203.

It should be added here that the coil 4 in the present application has a circular cross section, and the shape of the mounting groove 202 is adapted to the coil 4. Since the coil 4 is plural, the plural mounting grooves 202 are provided along the circumferential direction of the positioning member body 2, and the plural mounting grooves 202 communicate with each other.

As shown in fig. 1-5, the power supply device provided by the present invention further includes a first end cap 5; the first end cover 5 is buckled on one side of the positioning component body 2 provided with the coil 4 and is provided with a first accommodating cavity, and the rotating component and the coil 4 are arranged in the first accommodating cavity; the end of the connecting shaft 101 facing away from the magnet 3 passes through the first end cap 5 and is rotatably connected to the first end cap 5.

Through the first end cover 5 of detaining the one side of establishing at locating component body 2 to through the first chamber that holds that first end cover 5 and locating component body 2 formed, can seal rotating member body 1 and magnet 3 in first holding the intracavity, thereby can make rotating member body 1 obtain the protection to a certain extent, promote the life of whole device.

Specifically, as shown in fig. 1 to 5, the power supply device provided by the present invention further includes a second bearing 6; the outer ring of the second bearing 6 is connected to the first end cap 5, and the inner ring of the second bearing 6 is connected to the end of the connecting shaft 101 away from the magnet 3, so that the rotary member body 1 can rotate relative to the first end cap 5.

In this application, the first end cap 5 is connected to the end cap plate of the wheelset mechanism, so that the entire power supply device can be stably connected to the wheelset mechanism, and therefore, the rotary member body 1 can be rotated relative to the first end cap 5 by the second bearing 6.

It should be added here that, in the present application, the connection shaft portion 101 is further sleeved with a dust cover 8, and the dust cover 8 is covered on one side of the second bearing 6 departing from the positioning member body 2, so that the entering of dust or other foreign matters can be avoided to a certain extent.

Further, as shown in fig. 1-5, the power supply device provided by the present invention further includes a second end cap 7; the second end cap 7 is buckled on one side of the positioning member body 2, which is far away from the coil 4, and a second accommodating cavity is formed.

The second in this application holds the chamber and is used for holding sensing device, and the location screw has been seted up to the one side that positioning element body 2 deviates from coil 4, and second end cover 7 passes through bolt and positioning element body 2 fixed connection.

In addition, the utility model also provides a wheel pair sensing system, which comprises the power supply device, the sensing device and the wheel pair mechanism; the power supply device is connected with the sensing device to supply power to the sensing device; the sensing device comprises a circuit board, a processor, a plurality of sensors and an energy component; the energy source assembly is used for storing and transmitting electric power, the circuit board is used for mounting the sensors and the processor, and the sensors are used for monitoring the shaft temperature and vibration of the wheel shaft; the wheel set mechanism comprises a shaft end cover plate, a wheel shaft, a shell and a third bearing, wherein one end of the rotating component body 1, which is far away from the positioning component, is connected with the shaft end pressing plate, and the wheel shaft can drive the shaft end pressing plate to rotate so as to drive the rotating component body 1 to rotate.

The inner ring of the third bearing is connected with the wheel shaft, and the outer ring of the third bearing is connected with the shell; the shaft end cover plate is connected with the shell and used for installing a power supply device.

The power supply device is connected with the wheel set mechanism, and then the sensing device is electrically connected with the power supply device, so that the magnet 3 in the power supply device can be driven to rotate relative to the coil 4 through the rotation of the wheel shaft in the wheel set mechanism, and further the sensing device can be supplied with electric power, the sensor in the sensing device can monitor the state of the wheel set in real time, the installation complexity of a wheel set sensing system is reduced, and the problem that train fault monitoring equipment needs an external power supply is avoided.

The sensors in the present application comprise acceleration sensors and/or temperature sensors and/or acoustic sensors and/or current-voltage sensors and/or attitude sensors. Various data of the wheel set can be obtained in real time when the vehicle runs through different sensors, whether the data are different from a preset range or not is analyzed through a processor, if at least one data are different from the preset range, information such as alarm and early warning is sent out, and therefore the fault occurrence position can be determined according to specific data.

When the wheel pair sensing system that this application provided worked, through the rotation of shaft, driven 3 relative coils 4 rotations of magnet to make 3 magnetic induction lines that can cut coil 4 of magnet produce electric current. The current supplies power to the circuit board through the energy component, so that the integrated sensor on the circuit board can monitor the running state of the vehicle wheel set in real time, obtain corresponding detection data and transmit the data to the processor.

The processor compares the detection data with a set range to judge whether a fault exists, and if at least one item of detection data is different from the preset range, the processor sends out information such as alarm, early warning and the like to realize real-time monitoring of the vehicle wheel set.

It should be added that, in the present application, the current generated by cutting the magnetic induction line may directly supply power to the circuit board through the energy component, or may store electric energy through the charging power supply to provide power to the circuit board when the vehicle stops.

The processor can transmit data in a wired transmission mode, and the data acquired by the processor are transmitted by arranging the data transmission interface on the processor. Preferably, the processor may further include a storage unit for storing data transmitted by the sensor, and if a fault occurs, the processor can trace to the source through the stored data.

The data can be transmitted in a wireless transmission mode, and the wireless transmission mode can adopt at least one of a Beidou satellite, Bluetooth, a radio frequency identifier, LTE-M (LTE-Machine to Machine) rail transit mobile communication and a 4G or 5G transmitter.

An antenna hole is reserved on the second end cover 7, and the transmission efficiency of signals is improved to a certain extent.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power supply device for a wheel set sensing system is characterized by comprising a rotating component and a positioning component;

the rotating member includes a rotating member body and a magnet, and the positioning member includes a positioning member body and a coil;

the magnet is arranged on the rotating component body, and the coil is arranged on the positioning component body and corresponds to the movement track of the magnet;

the rotating member body comprises a connecting shaft part, one end of the connecting shaft part is rotatably connected with the positioning member body, the other end of the connecting shaft part is connected with a wheel shaft of a wheel set mechanism in the wheel set sensing system, and when the wheel shaft rotates, the rotating member body can rotate relative to the positioning member body, so that the magnet can rotate relative to the coil and generate current.

2. The power supply of claim 1 wherein said rotating member body further comprises a mounting portion;

the installation department is discoid, the axis of connecting the axial region with the centre of a circle collineation of installation department.

3. The power supply of claim 1, wherein the positioning member further comprises a first bearing;

the connecting shaft part is connected with the inner ring of the bearing, and the outer ring of the bearing is connected with the positioning member body.

4. The power supply device according to claim 2, wherein the number of the magnets is at least one, and the number of the coils is at least one.

5. The power supply device according to claim 4, wherein a positioning groove corresponding to the magnet is formed on the mounting portion;

the magnet can be embedded in the positioning groove;

mounting grooves which are in one-to-one correspondence with the coils are formed in one side, facing the magnet, of the positioning component body, and positioning columns are formed in the mounting grooves;

the coil is sleeved on the positioning column and is positioned in the mounting groove.

6. The power supply of claim 1, further comprising a first end cap;

the first end cover is buckled on one side of the positioning component body, which is provided with the coil, a first accommodating cavity is formed between the first end cover and the positioning component body, and the rotating component and the coil are arranged in the first accommodating cavity;

one end of the connecting shaft part, which deviates from the magnet, penetrates through the first end cover and is rotatably connected with the first end cover.

7. The power supply of claim 6, further comprising a second bearing;

the outer ring of the second bearing is connected with the first end cover, and the inner ring of the second bearing is connected with one end, away from the magnet, of the connecting shaft part, so that the rotating member body can rotate relative to the first end cover.

8. The power supply of claim 1, further comprising a second end cap;

the second end cover is buckled on one side of the positioning component body, which is far away from the coil, and a second accommodating cavity is formed and used for accommodating a sensing device in the wheel pair sensing system.

9. A wheel-to-wheel sensing system comprising a power supply unit as claimed in any one of claims 1 to 8, and a sensing unit and a wheel-to-wheel mechanism;

the power supply device is connected with the sensing device to supply power to the sensing device;

the wheel set mechanism comprises a shaft end pressing plate and a wheel shaft, the wheel shaft is connected with the shaft end pressing plate, one end, away from the positioning component, of the rotating component body is connected with the shaft end pressing plate, and the wheel shaft can drive the shaft end pressing plate to rotate so as to drive the rotating component body to rotate.

10. The wheel-pair sensing system according to claim 9, wherein the sensing device includes a circuit board, a processor, a plurality of sensors, and an energy source assembly;

the energy source assembly is used for storing and transmitting electric power, the circuit board is used for mounting the sensors and the processor, and the sensors are used for monitoring the shaft temperature and vibration of the wheel shaft.