Shaft temperature sensor

Abstract

The utility model discloses a shaft temperature sensor which comprises a flange joint used for being connected with a hub bearing shell, a shell used for installing a sensor circuit board and a heat insulation sheet, the two ends of the heat insulation sheet are connected with the flange joint and the shell respectively, and a temperature sensor is arranged in the flange joint. The temperature sensor is connected with the sensor circuit board, and the shell is made of a metal material and is connected with the sensor circuit board to form a signal transmission antenna of the sensor circuit board. According to the sensor, the flange joint and the shell are matched with the heat insulation sheet for connection, the metal shell ensures the use strength and durability of the sensor, heat transmitted by the hub bearing is effectively isolated through the arrangement of the heat insulation sheet, and the use performance of a circuit board in the shell is ensured; the arrangement mode of the circuit board in the metal shell is matched with the split design of the shell and the flange joint, so that the shell can be directly used as an antenna and has excellent wireless transmission performance and reliability.

Description

Technical Field

[0001] This utility model belongs to the field of sensors and relates to a shaft temperature sensor. Background Technology

[0002] Trailers are widely used in road transport due to their advantages of speed, maneuverability, and flexibility, especially in industries such as express logistics, hazardous chemicals, and car carriers. The ability to easily connect and disconnect the tractor unit and trailer makes loading and unloading goods between various transfer points very convenient.

[0003] However, the easy connection and disconnection between trailers and tractor units can lead to oversight of trailer performance and safety. This can result in trailers being driven on the road despite safety risks, potentially causing accidents. One key area requiring monitoring is the performance and safety of trailer wheel bearings under long-term use. Currently, there are sensors on the market that monitor wheel bearing temperature, including wired and wireless methods. Wired methods require wires connecting the trailer and tractor unit, increasing the complexity of disconnection and reconnection. For wireless methods, such as the wireless wheel bearing temperature sensor disclosed in patent CN205959386U, a built-in antenna is used for transmission. However, to ensure antenna transmission performance, the sensor housing needs to be made of plastic or rubber, which not only fails to guarantee strength and is prone to failure under impact during driving but is also susceptible to deformation and damage from the high temperatures of the wheel bearing. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a shaft temperature sensor.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A shaft temperature sensor includes a flange joint for connecting to a wheel hub bearing housing, a housing for mounting a sensor circuit board, and a heat insulation sheet. The two ends of the heat insulation sheet are respectively connected to the flange joint and the housing. A temperature sensor is disposed inside the flange joint and is connected to the sensor circuit board. The housing is made of metal and is connected to the sensor circuit board, forming a signal transmission antenna for the sensor circuit board.

[0007] Furthermore, one end of the flange joint has a protruding connecting post, and the outer circumference of the connecting post has an external thread for connection. The temperature sensor is embedded in the front end of the connecting post. The flange joint and the connecting post are made of metal.

[0008] Furthermore, it also includes a grounding bolt, one end of which is connected to the sensor circuit board, and a grounding hole is provided through the housing and the heat insulation sheet for the grounding bolt to pass through, and the other end of the grounding bolt is connected to the flange joint.

[0009] Furthermore, a cavity is provided inside the housing, the sensor circuit board is disposed in the cavity, a battery is disposed on the sensor circuit board, one end of the temperature sensor is connected to a wire, the wire passes through the housing and enters the cavity, and is connected to the sensor circuit board.

[0010] Furthermore, the cavity forms an open opening at one end of the outer shell, and the open opening is sealed with glue.

[0011] Furthermore, the flange joint, the heat insulation sheet, and the outer shell are arranged coaxially in sequence.

[0012] Furthermore, the flange joint is provided with a first slot for inserting one end of the heat insulation sheet in the axial direction, and the outer shell is provided with a second slot for inserting the other end of the heat insulation sheet in the axial direction.

[0013] Furthermore, a gasket is provided protruding from the outer periphery of the heat insulation sheet, and the two ends of the gasket abut against the flange joint and the outer shell, respectively.

[0014] Furthermore, the heat insulation sheet is fixedly connected to the flange joint by bolts, and the heat insulation sheet is fixedly connected to the outer shell by bolts.

[0015] Furthermore, the heat insulation sheet is made of ceramic.

[0016] In summary, the advantages of this utility model are as follows:

[0017] The sensor of this utility model adopts a flange joint and a heat insulation plate connection with the outer shell. The metal outer shell ensures the strength and durability of the sensor, and the heat insulation plate effectively isolates the heat transferred from the hub bearing, ensuring the performance of the circuit board inside the outer shell. The way the circuit board is set inside the metal outer shell, combined with the separate design of the outer shell and the flange joint, allows the outer shell to directly serve as an antenna, which has excellent wireless transmission performance and reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the shaft temperature sensor of this utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0020] Figure 3for Figure 2 A structural diagram from another perspective.

[0021] Figure 4 for Figure 1 A cross-sectional structural diagram.

[0022] The diagram shows: 1. Flange connector; 11. Connecting post; 12. Temperature sensor; 13. First slot; 2. Heat insulation sheet; 21. Gasket; 3. Housing; 31. Cavity; 32. Second slot; 4. Sensor circuit board; 41. Battery; 42. Grounding bolt. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0026] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0027] This embodiment provides a shaft temperature sensor, referencing... Figure 1 It includes a flange joint 1, a housing 3, and a heat insulation plate 2. The flange joint 1 is used to contact and connect with the housing of the trailer wheel hub bearing. The housing 3 is used to house the sensor circuit board 4. The heat insulation plate 2 is located between the housing 3 and the flange joint 1.

[0028] One end of the flange joint 1 has a protruding connecting post 11 with external threads on its outer circumference. The wheel hub bearing has a connecting hole for threaded connection with the connecting post 11, allowing the connecting post 11 to penetrate deep into the bearing and form a stable connection. A temperature sensor 12, such as a thermocouple, is embedded inside the connecting post 11. The flange joint 1 and the connecting post 11 are made of metal, providing good strength and durability. The excellent thermal conductivity of the metal material conducts the temperature inside the wheel hub bearing to the inside of the connecting post 11, allowing the thermocouple to accurately obtain the temperature data of the bearing. The thermocouple is located at the front end of the connecting post 11. With the deep connection between the connecting post 11 and the bearing housing, the thermocouple also penetrates deep into the bearing housing, which is conducive to more timely detection of changes in bearing temperature.

[0029] Reference Figures 2 to 3 The outer shell 3 has a cavity 31 inside, and the cavity 31 has an open opening at one end. The sensor circuit board 4 is installed in the cavity 31 through the open opening. The sensor circuit board 4 has a battery 41 installed on it. One end of the thermocouple is connected to a wire. The outer shell 3 has a through hole for the wire to pass through. The wire passes through the hole into the cavity 31 and connects with the sensor circuit board 4 to form a temperature signal transmission and acquisition.

[0030] After the sensor circuit board 4 and other components inside the cavity 31 are installed in place, the space inside the cavity 31 is sealed with potting compound to form waterproof, dustproof and stability protection.

[0031] The heat insulation sheet 2 has a set thickness. The flange joint 1 is connected to one end of the heat insulation sheet 2, and the outer shell 3 is connected to the other end of the heat insulation sheet 2, so that the flange joint 1 and the outer shell 3 form a set distance and do not come into contact.

[0032] The heat insulation sheet 2 is made of a material with low thermal conductivity and insulation, preferably ceramic, to prevent excessive heat on the bearing from being conducted into the housing 3 and affecting the performance of the circuit board. The housing 3 is made of metal, and the sensor circuit board 4 is electrically connected to the housing 3, so that the housing 3 can be directly used as an antenna to output signals to the tractor.

[0033] Preferably, the flange joint 1, the heat insulation sheet 2, and the outer shell 3 are combined and connected to form a columnar structure, and are arranged coaxially in sequence. Multiple bolts are passed through the outer shell 3 and the heat insulation sheet 2 to fix the heat insulation sheet 2 and the outer shell 3. Multiple bolts are also passed through the flange joint 1 and the heat insulation sheet 2 to further fix the flange joint 1, the heat insulation sheet 2, and the outer shell 3.

[0034] A gasket 21 is provided with a circumferential protrusion on the outer periphery of the heat insulation sheet 2. A first slot 13 is provided on the flange joint 1 for inserting one end of the heat insulation sheet 2 in the axial direction. A second slot 32 is provided on the outer shell 3 for inserting the other end of the heat insulation sheet 2 in the axial direction. When the flange joint 1 and the outer shell 3 are connected to the heat insulation sheet 2, the flange joint 1 and the outer shell 3 respectively abut against the two ends of the gasket 21 in the axial direction. The thickness of the gasket 21 forms a set distance between the flange joint 1 and the outer shell 3.

[0035] The outer periphery of gasket 21 is flush with the outer periphery of housing 3 and flange joint 1 respectively, so that the outer wall of the entire shaft temperature sensor is smoothly transitioned and the overall shape is consistent and integrated.

[0036] Furthermore, a grounding bolt 42 is provided, one end of which is connected to the circuit board. A grounding hole for the grounding bolt 42 is provided through the outer casing 3 and the heat insulation sheet 2. The other end of the grounding bolt 42 passes through the grounding hole and forms a contact connection with the flange joint 1, thereby providing grounding to the circuit board.

[0037] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A shaft temperature sensor, characterized by, The application relates to a temperature sensor for a wheel hub bearing shell, which comprises a flange joint (1) for connecting with the wheel hub bearing shell, a shell (3) for mounting a sensor circuit board (4), and a heat insulation sheet (2) connected with the flange joint (1) and the shell (3) respectively, wherein a temperature sensor (12) is arranged in the flange joint (1) and connected with the sensor circuit board (4), the shell (3) is made of metal and connected with the sensor circuit board (4) and forms a signal transmission antenna of the sensor circuit board (4).

2. A shaft temperature sensor according to claim 1, wherein One end of the flange joint (1) is provided with a connecting column (11) with external threads for connection, and the temperature sensor (12) is embedded in the front end of the connecting column (11), and the flange joint (1) and the connecting column (11) are made of metal.

3. A shaft temperature sensor according to claim 2, wherein The application further comprises a grounding bolt (42) with one end connected with the sensor circuit board (4), and grounding holes are arranged through the shell (3) and the heat insulation sheet (2) for the grounding bolt (42) to pass through, and the other end of the grounding bolt (42) is connected with the flange joint (1).

4. An axle temperature sensor according to claim 2, wherein The shell (3) is provided with a cavity (31), the sensor circuit board (4) is arranged in the cavity (31), a battery (41) is arranged on the sensor circuit board (4), one end of the temperature sensor (12) is connected with a wire, the wire passes through the shell (3) into the cavity (31) and is connected with the sensor circuit board (4).

5. A shaft temperature sensor according to claim 4, wherein The cavity (31) is open at one end of the shell (3), and the open end is closed by glue pouring.

6. The shaft temperature sensor of claim 1, wherein, The flange joint (1), the heat insulation sheet (2) and the shell (3) are coaxially arranged in sequence.

7. An axle temperature sensor according to claim 6, wherein The flange joint (1) is provided with a first insertion slot (13) for inserting one end of the heat insulation sheet (2) in the axial direction, and the shell (3) is provided with a second insertion slot (32) for inserting the other end of the heat insulation sheet (2) in the axial direction.

8. An axle temperature sensor according to claim 7, wherein, The heat insulation sheet (2) is provided with a gasket (21) on the outer periphery, and the two ends of the gasket (21) abut against the flange joint (1) and the shell (3) respectively.

9. The shaft temperature sensor of claim 1, wherein, The heat insulation sheet (2) is fixedly connected with the flange joint (1) by a bolt, and the heat insulation sheet (2) is fixedly connected with the shell (3) by a bolt.

10. The shaft temperature sensor of claim 1, wherein, The heat insulation sheet (2) is made of ceramic.

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