Temperature detection device and brake disc temperature measurement equipment

Abstract

The utility model relates to a temperature detection device, which comprises a sleeve, a contact ball head, a spring, a heat conduction rod and a locking mechanism, wherein the sleeve is provided with an open near-end part; the contact ball head and the spring are positioned in the sleeve; the heat conduction rod is provided with an abutting part and a rod part; the inner diameter of the sleeve wall at the near end part of the sleeve is smaller than the inner diameter of the sleeve wall of other parts of the sleeve, so that one part of the contact ball head can protrude out of the end part of the sleeve to be in contact with a temperature detection object while the contact ball head is kept by the sleeve; the abutting part of the heat conduction rod abuts against the contact ball head, and meanwhile the locking mechanism pushes and presses the spring so that the spring can act on the abutting part of the heat conduction rod. The rod part of the heat conduction rod is slidably arranged on the inner side of the center channel of the locking mechanism in the axial direction of the sleeve. The temperature detection device provided by the utility model has the advantages of high-precision real-time measurement, quick response and the like. The measurement accuracy of the temperature of the brake disc can be improved, and the reliability and safety of a vehicle brake system can be effectively improved.

Description

Technical Field

[0001] This utility model relates to a temperature detection device and a brake disc temperature measuring device, specifically to a temperature detection device and a brake disc temperature measuring device for directly measuring the temperature of a brake disc. Background Technology

[0002] In the modern automotive industry, the performance of the braking system is closely related to vehicle safety. The operating temperature of the brake disc directly affects its coefficient of friction; therefore, accurate measurement of the brake disc temperature is crucial for optimizing braking performance. Traditionally, calculation methods based on three heat dissipation modes—conduction, convection, and radiation—are used to estimate brake disc temperature. However, these calculations often rely on model assumptions and boundary conditions, sometimes resulting in temperature errors as high as 100°C.

[0003] Furthermore, the relationship between brake disc temperature and the coefficient of friction is non-linear; temperature variations significantly affect the coefficient of friction. Simultaneously, within certain temperature ranges, the frictional properties of the brake disc material may decrease or increase significantly with increasing temperature. This inaccurate estimation of the brake disc's coefficient of friction leads to unstable braking performance, thereby affecting the vehicle's braking distance and safety. Under conditions of significant temperature error, performance prediction and optimization schemes for the braking system become even more unreliable.

[0004] To reduce such errors, many companies have begun to adopt more precise measurement methods in recent years, such as infrared thermography, direct measurement with thermal sensors, and numerical simulations based on actual operating conditions, to monitor brake disc temperature in real time. These technologies help improve the accuracy of temperature measurement and optimize braking system performance, but they still have problems such as low temperature measurement accuracy and high operating costs.

[0005] As mentioned above, existing brake disc temperature detection devices have many shortcomings, and their related structures need to be optimized and improved. Utility Model Content

[0006] The brake disc temperature detection device of this utility model does not use traditional temperature measurement technology, but redesigns the structure of the temperature measuring device to ensure that the heat of the brake disc can be efficiently transferred to the temperature detection device.

[0007] This invention relates to a temperature detection device suitable for measuring the temperature of brake discs using thermal sensors, particularly thermocouple sensors. Thermocouple sensors measure temperature based on the Seebeck effect. When two different conductors or semiconductors are connected to form a circuit, an electromotive force (voltage difference) is generated if the temperatures at the connection points are different, and the magnitude of this voltage difference is proportional to the temperature difference. Therefore, by measuring the voltage difference, the temperature difference and temperature value can be accurately determined.

[0008] Therefore, this utility model discloses a temperature detection device, including a sleeve with an open distal end and a proximal end, a contact ball head and a spring located inside the sleeve, a heat-conducting rod passing through the distal end of the sleeve and at least partially disposed inside the sleeve, and a locking mechanism having a central channel. The device is characterized in that: the inner diameter of the sleeve wall at the proximal end is smaller than the inner diameter of the sleeve wall in other parts, such that while the contact ball head is held by the sleeve, a portion of the contact ball head can protrude beyond the end of the sleeve and contact the temperature detection object; the abutting portion of the heat-conducting rod abuts against the contact ball head, while the locking mechanism pushes the spring so that the spring acts on the abutting portion of the heat-conducting rod; the rod portion of the heat-conducting rod is slidably disposed along the axial direction of the sleeve inside the central channel of the locking mechanism.

[0009] Optionally, the locking mechanism includes a small-diameter portion and a large-diameter portion connected to each other, wherein a spring is compressed between the small-diameter portion of the locking mechanism and the abutment portion of the heat-conducting rod; the large-diameter portion of the locking mechanism abuts against the end face of the distal end of the sleeve.

[0010] Optionally, a thermal sensor connected to the locking mechanism is also provided to measure the temperature of the object being measured. Optionally, the thermal sensor is a thermocouple sensor.

[0011] Optionally, it also includes a fastening device disposed on the outer circumferential surface of the sleeve for fixing the temperature detection device relative to the object being measured.

[0012] Optionally, the axial cross-section of the contact portion of the heat-conducting rod is either truncated cone or spherical.

[0013] Optionally, the small-diameter portion and the large-diameter portion of the locking mechanism form a stepped portion, and the end face of the distal end of the sleeve abuts against the large-diameter portion of the locking mechanism at the stepped portion.

[0014] Optionally, the small-diameter portion of the locking mechanism may also have an axial protrusion that fixes and limits the radial position of the limiting spring.

[0015] Optionally, the maximum radial dimension of the axial protrusion corresponds to the inner coil dimension of the limiting spring.

[0016] This application also discloses a brake disc temperature measuring device, including the previously described temperature detection device, and a partition for fixing the temperature detection device, wherein the temperature detection device is fixed in the partition in such a way that the contact ball can contact the surface of the brake disc.

[0017] Optionally, the contact ball joint may be made of a material with a lower hardness and wear resistance index than the brake disc.

[0018] When measuring the temperature of brake discs, the temperature detection device of this invention has advantages such as high-precision real-time measurement, fast response, adaptability to high-temperature environments, and integration with vehicle control systems. It not only improves the accuracy of brake disc temperature measurement but also effectively enhances the reliability and safety of the vehicle braking system. Attached Figure Description

[0019] The significant features and advantages of this utility model will become apparent from the following non-limiting description with reference to the accompanying drawings, wherein:

[0020] Figure 1 A perspective view of a brake disc 10 of a vehicle is shown.

[0021] Figure 2 A side view of the vehicle's brake disc 10 is shown.

[0022] Figure 3 The relative positions of the brake disc 10, the partition 20, and the temperature detection device 30 are shown.

[0023] Figure 4 The relative positions of the brake disc 10, the partition 20, and the temperature detection device 30 are shown.

[0024] Figure 5 A perspective view of a temperature detection device 100 according to the present invention is shown.

[0025] Figure 6 An exploded view of the temperature detection device 100 according to the present invention is shown.

[0026] Figure 7 A cross-sectional view of a temperature detection device 100 according to the present invention is shown.

[0027] Figure 8 A side view of the temperature detection device 100 according to the present invention is shown. Detailed Implementation

[0028] Figure 1 A perspective view of a brake disc 10 of a vehicle is shown. Figure 2A side view of the vehicle's brake disc 10 is shown. The vehicle's brake disc is typically fixed to the vehicle's wheel hub by bolts or circlips and rotates with the vehicle's wheels, its axis of rotation coinciding with the wheel's axis of rotation. During braking, the vehicle's hydraulic system functions to drive brake pads (not shown) to clamp the brake disc 10. Friction is generated between the brake disc 10 and the brake pads, causing the vehicle's kinetic energy to be converted into heat energy, resulting in a significant increase in the temperature of the brake disc.

[0029] To dissipate the heat generated by friction as quickly as possible and prevent the brake disc from overheating and causing brake failure, this is generally achieved by selecting the best brake disc material and optimizing the heat dissipation structure. For example, the brake disc 10 is made of cast iron, carbon ceramic, or composite materials. Cast iron brake discs are durable and reasonably priced, while carbon ceramic brake discs have better high-temperature resistance and are lightweight.

[0030] like Figure 1-2 As shown, the brake disc 10 consists of a friction plate 11, a back plate 13, and multiple heat dissipation blades or heat dissipation support columns 12 distributed circumferentially between the two. Among them, the friction plate 11 is responsible for providing braking force, the back plate 13 plays the role of supporting and transmitting pressure, and the heat dissipation support columns 12 are used to enhance the heat dissipation effect.

[0031] In the prior art, a temperature detection device 30 is typically used in vehicles to monitor the temperature of the brake disc 10 to prevent the brake disc from overheating. The temperature detection device 30 is preferably a thermal sensor. Figure 3-4 The relative positions of the brake disc 10, the partition 20, and the temperature detection device 30 are shown.

[0032] like Figure 3-4 As shown, the temperature detection device 30 is fixed to the partition 20 in a certain way, so that the relative position of the temperature detection device 30 with respect to the brake disc 10 is determined. The temperature detection device 30 contacts or abuts against the friction plate 11 of the brake disc 10, thereby enabling direct measurement of the temperature of the brake disc 10. In some embodiments, the partition 20 also functions as a heat insulation plate.

[0033] Figure 5 A perspective view of a temperature detection device 100 according to the present invention is shown, wherein the temperature detection device 100 is preferably a thermal detection sensor device. Figure 6 An exploded view of the temperature detection device 100 according to the present invention is shown. Figure 7 A cross-sectional view of a temperature detection device 100 according to the present invention is shown. Figure 8 A side view of the temperature detection device 100 according to the present invention is shown.

[0034] like Figure 5-8 As shown, the temperature detection device 100 includes: a contact ball head 101, a heat-conducting rod 102, a spring (or a limiting spring) 103, a locking mechanism 104, and a sleeve 105. To enable the temperature detection device 100 to be mounted and fixed on the partition 20, the temperature detection device 100 also includes a fastening device 106. Optionally, the locking mechanism 104 is directly connected to the thermal sensor 107 so that the thermal sensor 107 can directly and accurately measure the temperature of the brake disc 10 in contact with the temperature detection device 100. Optionally, the thermal sensor 107 is a thermocouple sensor.

[0035] The contact ball 101 is spherical in shape. When selecting the material for the contact ball 101, both its thermal conductivity and wear resistance or wear index must be considered. For example, the wear resistance of the contact ball 101 is chosen to be lower than that of the brake disc 10, thereby preventing premature wear and failure of the brake disc 10. Conversely, after the contact ball 101 wears out, the temperature sensing device 100 is easier to replace than the brake disc 10.

[0036] Optionally, the contact ball 101 is made of bearing steel. As a preferred embodiment, the bearing steel used to make the contact ball 101 has a thermal conductivity of 20-50 W / m / K, a Rockwell hardness of 50-70, and a tensile strength of 800-2000 Nm. The contact ball 101 can also be made of silicon nitride. For example, the silicon nitride has a thermal conductivity of 20-30 W / m / K, a Rockwell hardness of 20-30, and a tensile strength of 600-1000 Nm.

[0037] The sleeve 105 is cylindrical, open at both ends, and has a distal end 105a, which is away from the contact ball head 101 in the assembled state, and a proximal end 105b, which is close to the contact ball head 101. The inner diameter of the proximal end 105b of the sleeve 105 gradually decreases along the axial direction of the sleeve 105, and can optionally be shaped as a frustoconical opening. Except for the proximal end 105b, the inner diameter of the sleeve 105 is approximately equal and slightly larger than the outer diameter of the contact ball head 101. Therefore, the contact ball head 101 can be inserted into the interior of the sleeve 105 from the opening of the distal end 105a, and eventually abut against the inner wall of the proximal end 105b of the sleeve 105, where the opening size decreases.

[0038] During the assembly of the temperature detection device 100, the contact ball head 101 is placed from the distal end 105a of the sleeve 105 to the inner side of the sleeve 105. In the assembled state, a portion of the contact ball head 101 is blocked by and abuts against the frustoconical inner wall of the proximal end 105b of the sleeve 105. Another portion of the contact ball head 101 protrudes to the outer side of the proximal end 105b of the sleeve 105 for contacting the friction plate of the brake disc 10. When contacting the high-speed rotating brake disc 10, the contact ball head 101 rolls against the frustoconical inner wall of the proximal end 105b of the sleeve 105.

[0039] The heat-conducting rod 102 includes a contact portion 102a and a rod portion 102b. The axial cross-section of the contact portion 102a can be either truncated cone or spherical to better contact and limit the spherical surface of the contact ball head 101, while also enabling efficient heat conduction. The contact portion 102a includes a first end face 102a1 that contacts the contact ball head 101, and a second end face 102a2 opposite to the first end face 102a1.

[0040] The rod portion 102b of the heat-conducting rod 102 extends axially along the sleeve 105 and can be slidably inserted into the central channel 104a of the locking mechanism 104, which will be described later. In the assembled state, the contact ball head 101 is placed against the frustoconical inner wall of the proximal end 105b of the sleeve 105, while the heat-conducting rod 102 is located inside the sleeve 105, and the abutting portion 102a of the heat-conducting rod 102 abuts against the bottom surface of the contact ball head 101.

[0041] The locking mechanism 104 includes a small-diameter portion 104b, whose outer diameter is slightly smaller than the inner diameter of the sleeve 105, a large-diameter portion 104c, whose outer diameter is larger than the inner diameter of the sleeve 105, and a central channel 104a. The central channel 104a of the locking mechanism 104 may extend through the entire locking mechanism 104, or only through a portion of the locking mechanism 104. A stepped portion 104d is formed between the small-diameter portion 104b and the large-diameter portion 104c. The small-diameter portion 104b has an end face 104b1 facing the contact ball head 101.

[0042] In the assembled state, the distal end 105a of the sleeve 105 is sleeved on the outer periphery of the small diameter portion 104b of the locking mechanism 104, and the end face of the distal end 105a of the sleeve 105 abuts against the large diameter portion 104c of the locking mechanism 104 at the stepped portion 104d of the locking mechanism 104.

[0043] With the contact ball head 101 and the heat-conducting rod 102 already placed in the sleeve 105, the limiting spring 103 and the small-diameter portion 104b of the locking mechanism 104 are placed inside the sleeve 105 in sequence. Moving the limiting spring 103 and the locking mechanism 104 in the direction toward the contact ball head 101, the limiting spring 103 is compressed so that its two ends abut against the second end face 102a2 of the abutment portion 102a and the end face 104b1 of the small-diameter portion 104b of the locking mechanism 104, respectively.

[0044] The small-diameter portion 104b of the locking mechanism 104 also has an axial protrusion to fix the radial position of the limiting spring 103, thereby preventing the limiting spring 103 from loosening uncontrollably within the sleeve 105. Optionally, the maximum radial dimension of the axial protrusion corresponds to the inner ring dimension of the limiting spring 103.

[0045] like Figure 7 As shown, in the assembled state, the rod portion 102b of the heat-conducting rod 102 extends to the inner side of the central channel 104a of the locking mechanism 104. The outer peripheral surface of the rod portion 102b forms a sliding fit with the inner peripheral wall of the central channel 104a, and the rod portion 102b can slide or move axially within the central channel 104a.

[0046] The fastening device 106 is mounted on the outer peripheral surface of the sleeve 105 to fix the temperature sensing device 100 to the partition 20, thereby defining the relative position of the temperature sensing device 100 with respect to the brake disc 10, so that the contact ball head 101 can contact or abut against the friction plate 11 of the brake disc 10 with appropriate pressure. As a preferred embodiment, the fastening device 106 is a fixing nut.

[0047] like Figure 7 As shown, the central channel 104a of the locking mechanism 104 is also provided with a portion of, or connected to, a thermal sensor 107 for measuring the temperature of the brake disc. It is conceivable that the thermal sensor 107 may also be connected to the locking mechanism 104, the sleeve 105, or the entire temperature detection device 100 in other ways to receive heat transferred from the brake disc 10 and thus measure the temperature of the brake disc 10.

[0048] As mentioned earlier, the thermal detection sensor 107 can optionally be a thermocouple sensor. The thermocouple sensor operates based on the Seebeck effect, measuring temperature based on the voltage difference generated when different metal materials come into contact. The thermocouple sensor directly contacts the brake disc or its vicinity, providing highly accurate temperature readings and reducing calculation errors found in traditional methods. Using a wear-resistant thermocouple sensor to measure the brake disc temperature is a direct measurement method, thus ensuring high accuracy.

[0049] By using thermocouple sensors to measure the temperature of the brake discs, real-time temperatures can be accurately measured. Furthermore, when used in conjunction with relevant software programs, the vehicle's hydraulic pressure can be controlled to reduce energy consumption.

[0050] In some embodiments, by combining a thermal sensor and a wheel speed sensor, not only can the functions of a traditional wheel speed sensor be achieved, but the temperature of the brake disc can also be measured.

[0051] The following section, in conjunction with the assembly process of the temperature detection device 100, will illustrate the beneficial technical effects of this utility model.

[0052] First, the contact ball head 101 is placed inside the sleeve 105. Then, the heat-conducting rod 102 and the limiting spring 103 are placed inside the sleeve 105, with the limiting spring 103 sleeved around the periphery of the rod portion 102b of the heat-conducting rod 102. Next, the small-diameter portion 104b of the locking mechanism 104 is placed inside the sleeve 105, such that the end face 104b1 of the small-diameter portion 104b presses against the limiting spring 103, while the rod portion 102b of the heat-conducting rod 102 is slidably inserted into the central channel 104a of the locking mechanism 104. The locking mechanism 104 is pushed in the direction toward the contact ball head 101, causing the limiting spring 103 to be compressed and act on the abutment portion 102a of the heat-conducting rod 102. The abutting portion 102a pushes the contact ball head 101 against the truncated conical inner wall of the proximal end 105b of the sleeve 105, so that a part of the contact ball head 101 extends to the outside of the sleeve 105, and finally the stepped portion 104d of the locking mechanism 104 abuts against the end face of the distal end 105a of the sleeve 105.

[0053] The contact ball head 101 is subjected to a compressive force from the limiting spring 103 at the heat-conducting rod 102, thereby enabling it to elastically contact the friction plate 11 of the brake disc 10 with a certain pressure. Since the brake disc 10 is a rotating component fixed on the wheel axle and rotating synchronously with the wheel, the contact ball head 101 will roll within the proximal end 105b of the sleeve 105 after contacting the friction plate 11 of the high-speed rotating brake disc 10, thereby reducing the wear of the contact ball head 101 or the friction plate 11 of the brake disc 10 and extending its service life.

[0054] During temperature measurement, the contact ball 101 directly contacts the friction plate 11 of the brake disc 10, thereby transferring the temperature of the brake disc 10 to the locking mechanism 104 and the thermal sensor 107. During this process, the diameter of the contact ball 101 wears down due to continuous contact with the brake disc 10, gradually decreasing in size. However, as the diameter of the contact ball 101 decreases, the contact position between the contact ball 101 and the abutment portion 102a of the heat-conducting rod 102 also changes. The abutment portion 102a will not always be in contact with the high-speed rotating contact ball 101 in one position, thus preventing the abutment portion 102a from wearing out prematurely and failing.

[0055] During the temperature monitoring and measurement of the brake disc 10 by the temperature detection device 100 using the contact ball head 101, the contact between the temperature detection device 100 and the contact disc 10 is a point contact, thereby reducing the possibility of wear on the contact ball head 101 and the brake disc 10. Simultaneously, as the contact ball head 101 wears and shrinks in size, the contact position between the contact ball head 101 and the abutment portion 102a of the heat-conducting rod 102 continuously changes, thus extending the service life of the abutment portion 102a.

[0056] The limiting spring 103 is compressed and presses against the abutment portion 102a of the heat-conducting rod 102 and the small-diameter portion 104b of the locking mechanism 104, making the temperature detection device 100 compact in structure and ensuring close contact between all components, thereby shortening the heat transfer path. Simultaneously, the limiting spring 103, made of metal, can also function as a heat transfer element.

[0057] The rod portion 102b of the heat-conducting rod 102 extends to the inner side of the central channel 104a of the locking mechanism 104. The outer peripheral surface of the rod portion 102b is in direct contact with the inner peripheral wall of the central channel 104a, thereby enhancing the efficiency of heat transfer, avoiding heat loss, and improving the accuracy of temperature measurement.

[0058] From the perspective of heat transfer paths, the heat generated when the brake disc 10 comes into contact with the contact ball joint 101 is transferred directly to the locking mechanism 104 and the thermal sensor 107 via a first path from the rod portion 102b of the heat-conducting rod 102. Simultaneously, it is transferred directly to the small-diameter portion 104b of the locking mechanism 104 via a second path from the abutment portion 102a of the heat-conducting rod 102 through the limiting spring 103, and finally to the thermal sensor 107. Therefore, the two heat transfer paths present in the temperature detection device 100 improve the heat transfer efficiency from the brake disc 10.

[0059] From the perspective of thermodynamic model, the brake disc 10, as a heat source, directly transfers heat to the locking mechanism 104 and the thermal detection sensor 107 via the heat-conducting rod 102 made of metal and the limiting spring 103, thereby efficiently transmitting the heat and temperature information of the brake disc 10 to the thermal detection sensor 107.

[0060] In summary, when measuring the temperature of the brake disc using the temperature detection device 100 according to this invention, the contact ball 101 makes rolling point contact with the brake disc 10. After the contact ball 101 wears down, the compressed limiting spring 103 pushes the heat-conducting rod 102 to move further towards the contact ball, so that the contact ball 101 remains in contact with the brake disc 10. As the diameter of the contact ball 101 decreases due to wear, the contact position between the abutting portion 102a of the heat-conducting rod 102 and the contact ball 101 changes, preventing the abutting portion 102a of the heat-conducting rod 102 from failing due to wear at a specific location. The temperature detection device 100 according to this invention can not only accurately measure the temperature of the brake disc 10, but also has higher reliability.

[0061] Finally, a temperature detection device 100 according to this utility model includes a sleeve 105 with an open distal end 105a and a proximal end 105b, a contact ball head 101 and a spring 103 located inside the sleeve 105, a heat-conducting rod 102 passing through the distal end 105a and at least partially disposed inside the sleeve 105, and a locking mechanism 104 having a central channel 104a. The device is characterized in that the inner diameter of the sleeve wall at the proximal end 105b is smaller than the inner diameter of the sleeve wall in other parts of the sleeve 105, such that the contact ball head 101 and spring 103 are located inside the sleeve 105. While the ball head 101 is held by the sleeve 105, a portion of the contact ball head 101 can protrude beyond the end 105b of the sleeve 105 and contact the temperature detection object; the abutting portion 102a of the heat-conducting rod 102 abuts against the contact ball head 101, while the locking mechanism 104 pushes the spring 103 so that the spring 103 acts on the abutting portion 102a of the heat-conducting rod 102; the rod portion 102b of the heat-conducting rod 102 is slidably disposed inside the central channel 104a of the locking mechanism 104 along the axial direction of the sleeve 105.

[0062] The brake disc temperature measuring device 10 according to the present invention includes the temperature detection device 100 mentioned above, and also includes a partition 20 for fixing the temperature detection device 100, and the temperature detection device 100 is fixed in the partition 20 in such a way that the contact ball head 101 can contact the surface of the brake disc.

[0063] The technical solution of this utility model has been described above with reference to the example of measuring the temperature of the brake disc 10. However, this utility model is not limited to the case of measuring the temperature of the brake disc 10, but can be applied to other temperature measurement situations. Therefore, the subject matter of the appended claims is a temperature detection device, and is not limited to a device for measuring the temperature of a brake disc.

[0064] Although embodiments of this application have been described in detail above with reference to the accompanying drawings, those skilled in the art can make various modifications or substitutions to the above embodiments based on the teachings of this application without departing from the scope of protection of this application.

Claims

1. A temperature detection device (100), characterized in that: The sleeve (105) includes a distal end (105a) and a proximal end (105b) with openings, a contact ball head (101) and a spring (103) located within the sleeve (105), a heat-conducting rod (102) passing through the distal end (105a) of the sleeve (105) and at least partially disposed within the sleeve (105), and a locking mechanism (104) having a central channel (104a). The inner diameter of the sleeve wall at the near end (105b) of the sleeve (105) is smaller than the inner diameter of the sleeve wall of the other parts of the sleeve (105), so that while the contact ball head (101) is held by the sleeve (105), a part of the contact ball head (101) can protrude beyond the end (105b) of the sleeve (105) and contact the temperature detection object. The heat-conducting rod (102) has a stop portion (102a) and a rod portion (102b). The stop portion (102a) of the heat-conducting rod (102) abuts against the contact ball head (101), while the locking mechanism (104) pushes the spring (103) so that the spring (103) acts on the stop portion (102a) of the heat-conducting rod (102). The rod portion (102b) of the heat-conducting rod (102) is slidably disposed inside the central channel (104a) of the locking mechanism (104).

2. The temperature detection device (100) as described in claim 1, characterized in that: The locking mechanism (104) includes a small-diameter portion (104b) and a large-diameter portion (104c) connected to each other, wherein a spring (103) is compressed between the small-diameter portion (104b) of the locking mechanism (104) and the abutment portion (102a) of the heat-conducting rod (102); the large-diameter portion (104c) of the locking mechanism (104) abuts against the end face of the distal end (105a) of the sleeve (105).

3. The temperature detection device (100) as described in claim 1, characterized in that: It is also equipped with a thermal sensor (107) connected to the locking mechanism (104) for measuring the temperature of the object being measured.

4. The temperature detection device (100) as described in claim 1 or 2, characterized in that: It also includes a fastening device (106) disposed on the outer peripheral surface of the sleeve (105) for fixing the temperature detection device (100) relative to the object being measured.

5. The temperature detection device (100) as described in claim 1 or 2, characterized in that: The axial cross section of the abutting part (102a) of the heat-conducting rod (102) is either truncated cone or spherical.

6. The temperature detection device (100) as described in claim 2, characterized in that: The small-diameter portion (104b) of the locking mechanism (104) also has an axial protrusion that limits the radial position of the limiting spring (103).

7. The temperature detection device (100) as described in claim 6, characterized in that: The maximum radial dimension of the axial protrusion corresponds to the inner ring dimension of the limiting spring (103).

8. The temperature detection device (100) as described in claim 3, characterized in that: The thermal detection sensor (107) is a thermocouple sensor.

9. A brake disc temperature measuring device (10), characterized in that: The device includes the temperature detection device (100) according to any one of claims 1-8, and also includes a partition (20) for fixing the temperature detection device (100), and the temperature detection device (100) is fixed in the partition (20) in such a way that the contact ball (101) can contact the surface of the brake disc.

10. The brake disc temperature measuring device (10) as described in claim 9, characterized in that: The contact ball (101) is made of a material with a lower hardness and wear resistance index than the brake disc.

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