A temperature detection device for metro bogie axle box bearing

Abstract

The utility model relates to axle box temperature detection equipment technical field discloses a subway bogie axle box bearing temperature detection device, including bogie, the side end fixedly connected with mounting bracket of axle box, the middle part of mounting bracket is equipped with screw hole, the inside of screw hole is equipped with installation component, temperature detection component is equipped between the side end to inside of installation component, the side end of installation component is equipped with the pressure component, the utility model will install the screw hole of installation component into axle box side end mounting bracket, temperature detection component is close axle box with installation component, and the installation component is screwed and makes the pressure component spring compression, produces the axial pre -tightening force and reduces the vibration, avoids the clearance of sensor and axle box to appear to the vibration, and then passes through the aligned limit hole fixed screw rod of bolt, double anti -looseness, axle box bearing temperature is passed to sensor through heat conduction structure, and the conversion signal transmission is to control room, solves the problem that traditional bolt is easy to loosen and leads to inaccurate detection, guarantees temperature monitoring accurate, prevents the trouble.

Description

Technical Field

[0001] This utility model relates to the technical field of axle box temperature detection equipment, specifically, to a temperature detection device for axle box bearings of a subway bogie. Background Technology

[0002] The axle box bearings of subway bogies are critical transmission components. Abnormal temperatures (such as exceeding 60°C) can easily lead to bearing seizure and wheelset failure, requiring real-time temperature monitoring. Existing detection devices mostly adopt a "bolted and adhesive sensor" structure: the sensor is fixed to the axle box housing with bolts, and the wires are routed along the bogie.

[0003] However, this method has obvious drawbacks: the bogie vibrates violently during subway operation. When the sensor is fixed to the axle box housing with conventional bolts, the bolts will gradually loosen during vibration, which will cause a loose gap between the sensor and the axle box housing. This will affect the contact effect between the sensor and the axle box, thereby reducing the accuracy of the sensor in detecting the axle box temperature. Therefore, a subway bogie axle box bearing temperature detection device is needed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a temperature detection device for the axle box bearing of a subway bogie, which solves the problem in the prior art where the bogie vibrates violently during subway operation. When the sensor is fixed to the axle box housing with conventional bolts, the bolts gradually loosen during vibration, causing a loose gap between the sensor and the axle box housing, affecting the contact effect between the sensor and the axle box, and thus reducing the accuracy of the sensor in detecting the axle box temperature.

[0005] This utility model provides the following technical solution: a temperature detection device for a bearing of a subway bogie axle box, including a bogie, an axle box installed at the outer end of the bogie, a mounting bracket fixedly connected to the side end of the axle box, a screw hole in the middle of the mounting bracket, a mounting component inside the screw hole, a temperature detection component between the side end of the mounting component and the interior, and a pressing component at the side end of the mounting component.

[0006] As a preferred embodiment of the above technical solution, the mounting assembly includes a screw rod, which is threaded into the inside of a screw hole. A knob is fixedly connected to the side end of the screw rod, and a wire placement groove is provided between the side end of the knob and the side end of the screw rod.

[0007] As a preferred embodiment of the above technical solution, the knob has several anti-slip protrusions fixedly connected to its side end, and a side plate is fixedly connected to the side end of the knob, with a limit hole two provided on the side end of the side plate.

[0008] As a preferred embodiment of the above technical solution, the mounting bracket has several limiting holes on its side circumference.

[0009] As a preferred embodiment of the above technical solution, the temperature detection component includes a temperature sensor, a mounting plate is fixedly connected to the side end of the temperature sensor, a plurality of fasteners are fixedly installed between the mounting plate and the annular end face of the screw, and a wire is fixedly connected to the side end of the temperature sensor, the wire being inserted into a wire placement groove.

[0010] As a preferred embodiment of the above technical solution, a metal protective sleeve is fixedly installed on the outside of the temperature sensor, and a thermally conductive silicone pad is fixedly connected to the side end of the metal protective sleeve.

[0011] As a preferred embodiment of the above technical solution, the pressing assembly includes a plurality of hollow rods, each hollow rod being fixedly installed on the circular end face of the knob, each hollow rod having a spring fixedly connected to its inner end, each spring having a circular plate fixedly connected to its side end, each circular plate having a circular rod fixedly connected to its side end, each circular rod being inserted into the outer end of the hollow rod, and an annular plate fixedly connecting the side ends of each circular rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention screws the mounting component into the screw hole of the mounting bracket on the side of the axle box. The temperature detection component is close to the axle box along with the mounting component. Tightening the mounting component compresses the spring of the pressure component, generating axial preload and damping vibration to prevent vibration from causing gaps between the sensor and the axle box. The bolt is then fixed by bolts through aligned limiting holes, providing double anti-loosening. The temperature of the axle box bearing is transmitted to the sensor through the heat-conducting structure, and the converted signal is transmitted to the control room. This solves the problem of inaccurate detection caused by easy loosening of traditional bolts, ensuring accurate temperature monitoring and preventing malfunctions. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of a temperature detection device for a subway bogie axle box bearing.

[0015] Figure 2 A cross-sectional structural schematic diagram of a temperature detection device for axle box bearing of a subway bogie;

[0016] Figure 3 for Figure 1 A magnified schematic diagram of the structure of part A in the diagram;

[0017] Figure 4 for Figure 2 A magnified schematic diagram of part B.

[0018] In the diagram: 1. Bogie; 101. Axle box; 2. Mounting bracket; 201. Screw hole; 202. Limiting hole one; 3. Mounting assembly; 301. Screw; 302. Knob; 303. Wire placement groove; 304. Side plate; 305. Limiting hole two; 4. Temperature detection assembly; 401. Temperature sensor; 402. Mounting plate; 403. Wire; 404. Fastener; 5. Pressing assembly; 501. Hollow rod; 502. Spring; 503. Circular plate; 504. Circular rod; 505. Annular plate. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0020] like Figures 1-4 As shown, this utility model provides a technical solution: a temperature detection device for a subway bogie axle box bearing, including a bogie 1, an axle box 101 installed on the outer end of the bogie 1, a mounting bracket 2 fixedly connected to the side end of the axle box 101, a screw hole 201 in the middle of the mounting bracket 2, a mounting component 3 inside the screw hole 201, a temperature detection component 4 between the side end of the mounting component 3 and the interior, and a pressing component 5 on the side end of the mounting component 3. The mounting component 3 is screwed into the screw hole 201 of the mounting bracket 2 on the side end of the axle box 101, and the temperature detection component 4 is close to the axle box 101 along with the mounting component 3. Tightening the mounting component 3 compresses the spring of the pressing component 5, generating axial preload and damping vibration, preventing vibration from causing a gap between the sensor and the axle box 101. The bolt is then fixed by passing through aligned limiting holes, providing double anti-loosening. The bearing temperature of the axle box 101 is transmitted to the sensor through a heat-conducting structure, converted into a signal and transmitted to the control room, solving the problem of inaccurate detection caused by easy loosening of traditional bolts, ensuring accurate temperature monitoring and preventing malfunctions.

[0021] As one implementation method in this embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, the mounting assembly 3 includes a screw 301, which is threaded into the screw hole 201. A knob 302 is fixedly connected to the side end of the screw 301. A wire placement groove 303 is provided between the side end of the knob 302 and the side end of the screw 301. Several anti-slip protrusions are fixedly connected to the side end of the knob 302. A side plate 304 is fixedly connected to the side end of the knob 302. A second limiting hole 305 is provided on the side end of the side plate 304. Several first limiting holes 202 are provided on the circumference of the side end of the mounting bracket 2. In practice, the mounting assembly 3 is installed on the mounting bracket 2 on the side end of the axle box 101. The screw 301 is screwed into the screw hole 201 in the middle of the mounting bracket 2. The knob 302 with anti-slip protrusions is held and rotated slowly. While rotating, the contact status between the temperature detection assembly 4 and the outer shell of the axle box 101 is observed until it is completely and tightly attached to the outer shell of the axle box 101 to ensure that there is no gap in heat transfer.

[0022] As one implementation method in this embodiment, such as Figure 2 As shown, the temperature detection assembly 4 includes a temperature sensor 401, which is a PT100 platinum resistance sensor with a measurement range of -50℃ to 200℃ and an accuracy of ±0.1℃. A shielded wire is connected to the tail end. A mounting plate 402 is fixedly connected to the side end of the temperature sensor 401. Several fasteners 404 are fixedly installed between the mounting plate 402 and the annular end face of the screw 301. A wire 403 is fixedly connected to the side end of the temperature sensor 401 and inserted into the wire placement slot 303. A metal protective sleeve made of brass is fixedly installed on the outside of the temperature sensor 401 to prevent damage from foreign objects. A thermally conductive silicone pad is fixedly connected to the end. When the subway is running, the temperature of the bearing of the axle box 101 is quickly transferred to the temperature sensor 401 through the thermally conductive silicone pad. The sensor converts the temperature signal into an electrical signal and transmits it to the subway control room through a shielded wire. In practice, the temperature sensor 401 is fixed to the annular end face of the screw 301 by the mounting plate 402 and the fastener 404. The shielded wire at the tail of the temperature sensor 401 is embedded in the wire placement groove 303 opened on the side end of the screw 301 to the knob 302. The brass metal protective sleeve on the outside of the temperature sensor 401 can resist the impact of foreign objects. The thermally conductive silicone pad on its side end can ensure close contact with the outer shell of the axle box 101, laying the foundation for efficient heat transfer.

[0023] As one implementation method in this embodiment, such as Figure 2 and Figure 4 As shown, the pressing assembly 5 includes several hollow rods 501. Each hollow rod 501 is fixedly installed on the circular end face of the knob 302. A spring 502 is fixedly connected to the inner end of each hollow rod 501. A circular plate 503 is fixedly connected to the side end of each spring 502. A circular rod 504 is fixedly connected to the side end of each circular plate 503. Each circular rod 504 is inserted into the outer end of the hollow rod 501. An annular plate 505 is fixedly connected between the side ends of each circular rod 504. In practice, when the thermally conductive silicone pad is completely and tightly attached to the outer shell of the axle box 101, the pressing assembly 5... The annular plate 505 is already in contact with the surface of the mounting bracket 2. Tightening the knob 302 will push the spring 502 inside the hollow rod 501 to compress. The spring 502 transmits the elastic force evenly to the round rod 504 and the annular plate 505 through the round plate 503, forming a continuous axial preload. This ensures that the temperature sensor 401 is always in close contact with the axle box 101 housing, avoiding contact gaps caused by vibration. It also absorbs the energy of the severe vibration of the bogie 1 through the elastic deformation of the spring 502, reducing the direct impact of vibration on the screw 301, achieving a significant vibration reduction effect and preventing the screw 301 from loosening due to long-term high-frequency vibration.

[0024] Working principle: When the temperature detection device for the axle box bearing of the subway bogie is working, the temperature detection component 4 and the mounting component 3 are assembled first. The temperature sensor 401 is fixed to the annular end face of the screw 301 by the mounting plate 402 and the fastener 404. The shielded wire at the tail of the temperature sensor 401 is embedded in the wire placement groove 303 opened from the side end of the screw 301 to the knob 302. The brass metal protective sleeve on the outside of the temperature sensor 401 can resist the impact of foreign objects. The thermally conductive silicone pad on its side end can ensure close contact with the outer shell of the axle box 101, laying the foundation for efficient heat transfer.

[0025] Next, install the mounting component 3 onto the mounting bracket 2 on the side of the axle box 101. Screw the screw 301 into the screw hole 201 in the middle of the mounting bracket 2. Hold the knob 302 with anti-slip protrusion and rotate it slowly. While rotating, observe the adhesion between the thermal conductive silicone pad and the outer shell of the axle box 101 until the silicone pad is completely and tightly attached to the outer shell of the axle box 101 to ensure that there is no gap in heat transfer. At this time, the annular plate 505 in the pressing assembly 5 has contacted the surface of the mounting bracket 2. Tightening the knob 302 will push the spring 502 inside the hollow rod 501 to compress. The spring 502 transmits the elastic force evenly to the round rod 504 and the annular plate 505 through the round plate 503, forming a continuous axial preload. This ensures that the temperature sensor 401 is always in close contact with the axle box 101 housing, avoiding contact gaps caused by vibration. It also absorbs the energy of the severe vibration of the bogie 1 through the elastic deformation of the spring 502, reducing the direct impact of vibration on the screw 301, achieving a significant vibration reduction effect and preventing the screw 301 from loosening due to long-term high-frequency vibration.

[0026] Subsequently, the screw 301 is precisely positioned and fixed. Because the mounting bracket 2 has several limiting holes 202 on its side circumference, and the knob 302 has a limiting hole 305 on its side plate 304, the knob 302 is rotated to finely adjust its position so that the limiting hole 305 on the side plate 304 is aligned with one of the limiting holes 202 on the mounting bracket 2. Then, the bolt is passed through the aligned limiting holes 202 and 305, and tightened with a nut and washer. Through the rigid locking of the bolt and nut and washer, combined with the axial preload and vibration damping effect of the spring 502, a double anti-loosening structure of elastic buffer and mechanical locking is formed, which completely prevents the screw 301 from loosening or shifting during vibration.

[0027] During subway operation, the temperature of the bearing in axle box 101 is quickly transferred to the temperature sensor 401 through the thermally conductive silicone pad. The sensor converts the temperature signal into an electrical signal, which is transmitted to the control room via a shielded wire to achieve real-time and accurate monitoring. This design effectively solves the problem of inaccurate detection caused by the loosening of traditional bolt fixing due to vibration, providing a stable and reliable guarantee for the temperature detection of the bearing in axle box 101, and effectively preventing bearing seizure and wheelset failure caused by abnormal temperature.

[0028] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A temperature detection device for metro bogie axle box bearing, comprising a bogie (1), an axle box (101) is installed at the outer end of the bogie (1), characterized in that: The side end of the axle box (101) is fixedly connected to a mounting bracket (2). A screw hole (201) is provided in the middle of the mounting bracket (2). An installation component (3) is provided inside the screw hole (201). A temperature detection component (4) is provided between the side end and the inside of the installation component (3). A pressing component (5) is provided on the side end of the installation component (3).

2. The temperature detection device for a subway bogie axle box bearing according to claim 1, characterized in that: The mounting assembly (3) includes a screw (301), which is threaded into the inside of a screw hole (201). A knob (302) is fixedly connected to the side end of the screw (301), and a wire placement groove (303) is provided between the side end of the knob (302) and the side end of the screw (301).

3. The temperature detection device for a subway bogie axle box bearing according to claim 2, characterized in that: The knob (302) has several anti-slip protrusions fixedly connected to its side end, and a side plate (304) is fixedly connected to the side end of the knob (302). A limit hole (305) is provided on the side end of the side plate (304).

4. The temperature detection device for a subway bogie axle box bearing according to claim 3, characterized in that: The mounting bracket (2) has several limiting holes (202) on its side circumference.

5. The temperature detection device for a subway bogie axle box bearing according to claim 4, characterized in that: The temperature detection component (4) includes a temperature sensor (401), a mounting plate (402) is fixedly connected to the side end of the temperature sensor (401), and a number of fasteners (404) are fixedly installed between the mounting plate (402) and the annular end face of the screw (301). A wire (403) is fixedly connected to the side end of the temperature sensor (401), and the wire (403) is inserted into the wire placement groove (303).

6. The temperature detection device for a subway bogie axle box bearing according to claim 5, characterized in that: The temperature sensor (401) is externally fixedly fitted with a metal protective sleeve, and a thermally conductive silicone pad is fixedly connected to the side end of the metal protective sleeve.

7. The temperature detection device for a subway bogie axle box bearing according to claim 2, characterized in that: The pressing component (5) includes several hollow rods (501), each hollow rod (501) is fixedly installed on the circular end face of the knob (302), each hollow rod (501) is fixedly connected to a spring (502) on its inner side, each spring (502) is fixedly connected to a circular plate (503) on its side, each circular plate (503) is fixedly connected to a circular rod (504) on its side, each circular rod (504) is inserted into the outer side of the hollow rod (501), and an annular plate (505) is fixedly connected between the side ends of each circular rod (504).

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