Universal joint inner cavity temperature detection system and detection method

Abstract

The present application relates to a universal joint inner cavity temperature detection system, including a sensor arranged on a ball cage universal joint, the sensor including a data processing device and a probe rod for detecting the temperature in the inner cavity of the ball cage universal joint, a through hole connected to the inner cavity of the ball cage universal joint is provided on one end surface of the shaft of the ball cage universal joint, one end of the probe rod passes through the through hole and is located in the inner cavity of the ball cage universal joint. The present application has the effect of more accurate temperature test data, which is more helpful for the selection of grease.

Description

Technical Field

[0001] The present application relates to the field of constant velocity universal joints, and in particular to a universal joint inner cavity temperature detection system and a detection method thereof. Background Art

[0002] A constant velocity universal joint is a device that connects two shafts that have an angle or a change in relative position, and allows the two shafts to transmit power at the same angular velocity. It can overcome the problem of non-constant velocity in ordinary cross-axis universal joints. The most widely used constant velocity universal joints are ball-fork universal joints and ball-cage universal joints.

[0003] The contact between the steel ball and the ballway in the constant velocity joint is rolling friction. When in operation, grease is needed to reduce mechanical friction and increase the service life of the joint. In order to avoid the problem of insufficient or excessive grease, we first need to obtain the actual temperature of the inner cavity when the joint is in operation. The traditional method generally uses non-contact external sensing telemetry to measure the temperature of the outer surface of the joint cup, which needs to be fed back to the sensor through heat conduction and heat radiation.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the non-contact external sensing remote sensing to measure the temperature of the surface of the universal joint cup body has the disadvantage of inaccurate temperature monitoring data. Summary of the invention

[0005] In order to more accurately select grease and reduce the disadvantages of temperature detection, the present application provides a universal joint inner cavity temperature detection system and a detection method thereof.

[0006] In a first aspect, the present application provides a universal joint inner cavity temperature detection system, which adopts the following technical solution:

[0007] A universal joint inner cavity temperature detection system includes a sensor arranged on a ball cage universal joint, the sensor includes a data processing device and a probe rod for detecting the temperature in the inner cavity of the ball cage universal joint, a through hole connected to the inner cavity of the ball cage universal joint is opened on one end surface of the ball cage universal joint shaft, one end of the probe rod passes through the through hole and is located in the inner cavity of the ball cage universal joint.

[0008] By adopting the above technical scheme, when monitoring the inner cavity temperature of the ball cage universal joint, a ball cage universal joint that meets the test standards is selected, and a through hole is opened on one end face of the ball cage universal joint, and a probe rod is inserted into the inner cavity of the through hole. When the ball cage universal joint is working, the heat generated by the friction between the steel ball and the ball track is transferred to the probe rod. Since the inner cavity of the probe rod is integrated with a thermistor, the transferred heat causes the resistance value of the thermistor integrated on the probe rod to change, and the signal of the resistance change is transmitted to the data processing device, and finally the inner cavity temperature at this time is measured by the data processing device. Since the probe rod is directly inserted into the inner cavity of the ball cage universal joint, the tested temperature is more accurate than the temperature value of the outer wall of the universal joint directly tested by infrared rays. Therefore, the temperature data tested by the probe rod is more helpful for the staff to select lubricating grease.

[0009] Optionally, a copper block is provided at one end of the probe rod extending into the inner cavity of the ball cage universal joint, a first annular groove is provided on the inner wall of the ball cage universal joint, the copper block is embedded in the inner cavity of the first annular groove, the copper block is fixed to the inner wall of the ball cage universal joint by a hexagon socket bolt, a connecting hole is coaxially penetrated through the copper block on one side facing the probe rod, and the end of the probe rod extending into the through hole is interference fit with the connecting hole.

[0010] By adopting the above technical solution, the metal thermal conductivity of copper is 401, which is second only to the thermal conductivity of silver. Heat conduction is carried out through the copper block. On the one hand, the heat conduction area of ​​the probe rod is increased, making the test performance of the probe rod more stable. On the other hand, the sensitivity of temperature monitoring is improved. For slight temperature changes in the inner cavity of the ball cage universal joint, the copper block can quickly transfer the heat changes to the probe rod, making the temperature monitoring data more accurate. The interference fit clamping method between the copper block and the probe rod, on the one hand, increases the contact area between the copper block and the probe rod, so that the probe rod can respond to temperature changes on the copper block more quickly. On the other hand, the sealing between the copper block and the probe rod is enhanced, making it difficult for grease in the inner cavity of the ball cage universal joint to leak from the connecting hole.

[0011] Optionally, the copper block is in the shape of a truncated cone, and the end of the copper block with a larger diameter contacts the grease in the inner cavity of the ball cage universal joint, and the other end of the copper block abuts against the inner wall of the ball cage universal joint.

[0012] By adopting the above technical solution, the truncated cone-shaped copper block increases the contact area between the circumferential side wall of the copper block and the inner wall of the ball cage universal joint, thereby improving the stability and sensitivity of the test.

[0013] Optionally, a second annular groove is provided on the inner wall of the annular groove, and a silicone sealing ring is embedded in the inner cavity of the second annular groove.

[0014] By adopting the above technical solution, the silicone sealing ring has excellent sealing performance, tensile strength, high temperature resistance and aging resistance. The silicone sealing ring makes it difficult for grease in the inner cavity of the ball cage universal joint to leak out from the through hole.

[0015] Optionally, the data processing device includes a mounting shell, a data processor arranged in the inner cavity of the mounting shell, and a wireless Bluetooth transmitter. The data processor is electrically connected to the end of the probe rod away from the copper block through a wire, the data processor is electrically connected to the wireless Bluetooth transmitter, and a connector is provided on the outside of one end of the ball cage universal joint shaft to facilitate the sensor to monitor the temperature changes in the inner cavity of the ball cage universal joint in real time.

[0016] By adopting the above technical solution, the resistance change of the thermistor on the probe rod passes through the data processor, thereby displaying the current inner cavity temperature value on the display screen. The wireless Bluetooth transmitter can transmit data with the mobile phone App in real time. During the test process, the tester does not need to wait in the test workshop for data monitoring, which improves the convenience of the test.

[0017] Optionally, the connecting member includes a protective cover arranged outside the end of the probe rod away from the copper block, and a first nut fixed on the outer wall of one end of the protective cover, both ends of the protective cover are connected to the outside world, the first nut is threadedly connected to the outer wall of the ball cage universal joint shaft, and the other end of the protective cover is provided with a locking member for facilitating fixing the mounting shell in the inner cavity of the protective cover.

[0018] By adopting the above technical solution, during the road test, the vehicle body needs to be simulated on a real road flat running, and the temperature change in the inner cavity of the ball cage universal joint when the wheel rotates is monitored. Since the axle will rotate during the flat running process, the protective cover is directly fixed to the outer wall of the shaft end of the wheel hub through the first nut, so that the mounting shell and the probe rod in the mounting seat protective cover rotate together with the axle, so that when the wheel rotates, the mounting shell and the data processor and wireless Bluetooth transmitter in the mounting shell are difficult to be damaged, which makes it more convenient for testers to conduct real road simulation tests.

[0019] Optionally, a layer of plastic film is bonded to the outer wall of the mounting shell, a QR code for pairing and connecting with a wireless Bluetooth transmitter is printed on the side of the plastic film facing away from the mounting shell, a layer of transparent glass cover is fixed on the outer wall of the mounting shell, and the plastic film is located in the inner cavity of the transparent glass cover.

[0020] By adopting the above technical solution, when the mobile phone App is paired with the wireless Bluetooth transmitter, the pairing connection can be achieved by simply scanning the QR code. The transparent glass cover makes the QR code difficult to be damaged, making it more convenient for long-term use.

[0021] Optionally, the locking member includes a plurality of second nuts welded to the inner wall of the protective cover, and a transparent cover plate arranged outside the end of the protective cover away from the first nut, the transparent cover plate is fixedly connected to the mounting shell, and the transparent cover plate is threadedly connected to the inner cavity of the second nut via bolts.

[0022] By adopting the above technical solution, the mounting shell is fixed to the transparent cover by gluing so that the QR code faces one side of the transparent cover, and then the transparent cover is locked on the second nut by bolts. At this time, the mounting shell and the data processor and wireless Bluetooth transmitter in the mounting shell are all located in the inner cavity of the protective cover. On the one hand, the mounting shell and the data processor and wireless Bluetooth transmitter in the mounting shell are difficult to be damaged, and on the other hand, it is more convenient for monitoring personnel to conduct road test simulation.

[0023] In a second aspect, the present application provides a method for detecting the temperature of the inner cavity of a universal joint, which adopts the following technical solution:

[0024] A method for detecting the temperature of a universal joint inner cavity comprises the following steps:

[0025] S1: a through hole is formed: a through hole is formed on the end surface of the shaft rod at one end of the ball cage universal joint along the axial direction of the shaft rod, so that the through hole is connected with the inner cavity of the ball cage universal joint;

[0026] S2 copper block installation: remove the dust cover of the ball cage universal joint, and install the truncated cone copper block with the connection hole on the inner wall of the ball cage universal joint, and seal it to prevent the grease from flowing out of the through hole;

[0027] S3 fixes the protective cover and the probe rod: the end of the probe rod away from the mounting shell passes through the through hole and is inserted into the inner cavity of the connecting hole, the probe rod and the connecting hole are interference fit, and the first nut is threadedly connected to the outer wall of the shaft of the ball cage universal joint;

[0028] S4 Bluetooth pairing and testing: Use your mobile phone to scan the QR code on the outer wall of the installation shell to perform Bluetooth pairing and enter the official account page to enter the device model of the corresponding wireless Bluetooth transmitter. After the Bluetooth pairing connection is completed, real-time data monitoring is performed through bench tests and road tests.

[0029] By adopting the above technical solution, the temperature inside the inner cavity of the ball cage universal joint can be directly monitored. During the monitoring process, the heat generated by the friction between the steel ball and the ball track in the inner cavity of the ball cage universal joint is transferred to the copper block, and the copper block transfers the heat to the probe rod, causing the resistance of the thermistor on the probe rod to change. The changed signal is processed by the data processor to display the tested temperature value. During the test, the staff can pair and connect with the wireless Bluetooth transmitter through the mobile phone App. The data tested by the data processor is transmitted to the mobile phone of the data monitoring personnel through the wireless Bluetooth transmitter, and the monitoring personnel can view the temperature changes of the inner cavity of the ball cage universal joint in real time.

[0030] The present application includes at least one of the following beneficial technical effects:

[0031] 1. The probe rod is directly inserted into the inner cavity of the ball cage universal joint. The tested temperature is more accurate than the temperature value of the outer wall of the universal joint directly tested by infrared rays. The temperature data tested by the probe rod is more helpful for the staff to select the lubricating grease;

[0032] 2. By setting the copper block, on the one hand, the heat conduction area of ​​the probe is increased, making the test performance of the probe more stable, and on the other hand, the sensitivity of temperature monitoring is improved. For the slight temperature change in the inner cavity of the ball cage universal joint, the copper block can quickly transfer the heat change to the probe, making the temperature monitoring data more accurate;

[0033] 3. By providing a silicone sealing ring, the grease in the inner cavity of the ball cage universal joint is difficult to leak out from the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a cross-sectional view of the overall structure of an embodiment of the present application.

[0035] Figure 2 It is an exploded diagram of the sensor in the embodiment of the present application.

[0036] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0037] Explanation of the reference numerals: 1. ball cage universal joint; 2. sensor; 3. data processing device; 4. probe rod; 5. through hole; 6. copper block; 7. first ring groove; 8. connecting hole; 9. second ring groove; 10. silicone sealing ring; 11. mounting shell; 12. data processor; 13. wireless Bluetooth transmitter; 14. connecting piece; 15. protective cover; 16. first nut; 17. locking piece; 18. plastic film; 19. transparent glass cover; 20. second nut; 21. transparent cover. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-3This application is described in further detail.

[0039] The embodiments of the present application disclose a universal joint inner cavity temperature detection system and a detection method thereof.

[0040] Reference Figure 1 A universal joint inner cavity temperature detection system includes a sensor 2 arranged on a ball cage universal joint 1, the sensor 2 includes a data processing device 3 and a probe rod 4, a thermistor is integrally arranged in the probe rod 4, a through hole 5 is opened on one end surface of the shaft of the ball cage universal joint 1, the through hole 5 is connected to the inner cavity of the ball cage universal joint 1, and the insertion rod is inserted into the inner cavity of the through hole 5.

[0041] Reference Figure 2 The data processing device 3 includes a mounting shell 11, a data processor 12 and a wireless Bluetooth transmitter 13. The data processor 12 and the wireless Bluetooth transmitter 13 are both fixed on the inner wall of the mounting shell 11. The data processor 12 is electrically connected to the wireless Bluetooth transmitter 13. The data processor 12 is electrically connected to the thermistor in the probe rod 4 through a wire.

[0042] Reference Figure 2 A layer of plastic film 18 is bonded to the outer wall of the mounting shell 11, and a QR code for connecting the wireless Bluetooth transmitter 13 to the mobile phone is printed on the side of the plastic film 18 facing away from the mounting shell 11. A layer of transparent glass cover 19 is fixed to the outer wall of the mounting shell 11, and the plastic film 18 is located in the inner cavity of the transparent glass cover 19. Under the action of the transparent glass cover 19, the QR code on the plastic film 18 is difficult to be destroyed.

[0043] Reference Figure 1 and Figure 2 , a connecting piece 14 is arranged outside one end of the shaft rod of the ball cage universal joint 1 for facilitating the synchronous rotation of the mounting shell 11 and the ball cage universal joint 1, the connecting piece 14 includes a protective cover 15 and a first nut 16, the protective cover 15 is a round tube with both ends connected to the outside, the first nut 16 is welded on the outer wall of one end of the protective cover 15, the first nut 16 is threadedly connected to the shaft rod of one end of the ball cage universal joint 1, and a locking piece 17 is arranged on the other end of the protective cover 15 for facilitating fixing the mounting shell 11 in the inner cavity of the protective cover 15, the locking piece 17 includes a second nut 20 and a transparent cover plate 21, if A plurality of second nuts 20 are welded to the inner wall of the protective cover 15 at uniform intervals around the circumference of the protective cover 15. The transparent cover 21 is made of acrylic. The mounting shell 11 is fixed to one side of the transparent cover 21 by glue. The transparent cover 21 is threadedly connected to the inner wall of the second nut 20 by bolts. The transparent cover 21 allows the inspector to scan the QR code outside the protective cover 15. The mounting shell 11 is fixed to the inner wall of the protective cover 15. When the inspector conducts a road test, it is convenient to simulate in real time the temperature inside the inner cavity of the ball cage universal joint 1 when the wheel rotates.

[0044] Reference Figure 1 and Figure 3 A copper block 6 is arranged at one end of the probe rod 4 extending into the inner cavity of the ball cage universal joint 1. The copper block 6 is truncated cone-shaped and has a thickness of 6 mm. A first annular groove 7 is provided on the inner cavity wall of the ball cage universal joint 1. A second annular groove 9 is provided on the inner wall of the first annular groove 7. A silicone sealing ring 10 is embedded in the inner cavity of the second annular groove 9. The silicone sealing ring 10 has excellent sealing performance, tensile performance, high temperature resistance and aging resistance. The silicone sealing ring 10 makes it difficult for the grease in the inner cavity of the ball cage universal joint 1 to leak from the through hole 5. The copper block 6 is embedded in the inner cavity of the second annular groove 9. The copper block 6 is fixed to the inner wall of the ball cage universal joint 1 by a hexagon socket bolt, and the silicone sealing ring 10 is sleeved on the outer wall of the copper block 6.

[0045] Reference Figure 1 and Figure 2 A connecting hole 8 is coaxially opened on one side of the copper block 6, and the axis of the connecting hole 8 coincides with the axis of the through hole 5. One end of the probe rod 4 extending into the through hole 5 is interference fit with the connecting hole 8. On the one hand, the interference fit enhances the sealing between the probe rod 4 and the connecting hole 8, making it difficult for the grease to leak. On the other hand, the interference fit makes the contact between the probe rod 4 and the copper block 6 closer. The heat transfer capacity of the copper block 6 is relatively high. When the copper block 6 is heated, the heat can be quickly transferred to the probe rod 4, so that the resistance of the thermistor in the probe rod 4 changes, thereby testing the temperature value in the inner cavity of the ball cage universal joint 1.

[0046] A method for detecting the temperature of a universal joint inner cavity comprises the following steps:

[0047] S1 opens a through hole 5, selects a ball cage universal joint 1 that meets the test standards, and opens a through hole 5 on one end face of the shaft of the ball cage universal joint 1 along the axial direction of the shaft, so that one end of the through hole 5 is connected to the outside, and the other end of the through hole 5 is connected to the inner cavity of the ball cage universal joint 1.

[0048] S2 copper block 6 is installed, the dust cover of the ball cage universal joint 1 is removed in advance, and a first annular groove 7 is opened on the inner wall of the ball cage universal joint 1, and a second annular groove 9 is opened on the inner wall of the first annular groove 7, and a silicone sealing ring 10 is sleeved on the outer wall of the processed truncated cone-shaped copper block 6, so that the silicone sealing ring 10 is embedded in the second annular groove 9, and the copper block 6 is embedded in the first annular groove 7, and then the copper block 6 is fixed to the inner wall of the ball cage universal joint 1 by the hexagon socket bolts, and the removed dust cover is reinstalled.

[0049] S3 fixes the protective cover 15 and the probe rod 4, inserts the end of the probe rod 4 away from the wire into the inner cavity of the through hole 5, so that the end of the probe rod 4 extending into the through hole 5 is inserted into the connecting hole 8 of the copper block 6, and the connecting hole 8 and the probe rod 4 are interference fit. At the same time, the first nut 16 is threadedly connected to the end face of the shaft rod. At this time, the mounting shell 11 and the protective cover 15 can rotate synchronously with the shaft rod of the ball cage universal joint 1.

[0050] S4 Bluetooth pairing and testing, the tester uses the mobile phone to scan the QR code on the outer wall of the installation shell 11, so that the mobile phone Bluetooth is paired with the wireless Bluetooth transmitter 13. The tester enters the device model of the wireless Bluetooth transmitter 13 in the WeChat official account page. After the data connection is successful, bench tests and road tests are carried out for simulation tests. During the test, the page of the official account can display the temperature inside the inner cavity of the ball cage universal joint 1 in real time.

[0051] The bench test is mainly used to compare the difference between the inner cavity temperature and the outer wall temperature of the ball cage universal joint. During the bench test, the fixed joint swing angle of the ball cage universal joint is set to 35 degrees, the torque on the shaft of the ball cage universal joint is set to 550Nm, and the speed is 100rpm. At the same time, the mobile phone page shows that the inner cavity temperature of the ball cage universal joint is 91.01 degrees Celsius, and the outer wall temperature of the ball cage universal joint is 55.2 degrees Celsius. The following is a real-time data comparison table of the outer ball cage working surface temperature and the inner cavity temperature:

[0052]

[0053]

[0054] Through bench tests, the real-time changes of the surface temperature and inner cavity temperature of the ball cage universal joint were monitored. It was found that the initial change of the inner cavity temperature was faster than that of the outer shell surface temperature, and after stabilization, the inner cavity temperature was much higher than the outer surface temperature of the universal joint. At the end of the test, the dust cover was immediately cut off and the temperature of the inner cavity of the ball cage was measured with an infrared thermometer to be above 90°C, which was close to the data measured by the inner cavity online detection device and much higher than the temperature measured on the outer surface of the universal joint.

[0055] Road test, flat running test on the highway, the following is the data table of the temperature change of the inner cavity of the ball cage universal joint:

[0056]

[0057]

[0058] Since the road conditions are good and the driving state is stable, the measured temperature changes are relatively stable.

[0059] Tests on the bench and on the road show that the solution of online detection of the working temperature of the inner cavity of the ball cage universal joint can effectively solve the lag and inaccuracy of monitoring the temperature on the surface of the traditional universal joint. The application of the test solution can provide reliable data support for the inner cavity working temperature of the ball cage universal joint in the early stage of design, especially for the selection of grease for the inner cavity of the ball cage universal joint. It can provide intuitive data reference, and can more scientifically and normatively select the grease type corresponding to the ball cage universal joint of different torque sizes.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A universal joint inner cavity temperature detection system, characterized in that: The invention comprises a sensor (2) arranged on a ball cage universal joint (1), the sensor (2) comprising a data processing device (3) and a probe rod (4) for detecting the temperature in the inner cavity of the ball cage universal joint (1), a through hole (5) communicating with the inner cavity of the ball cage universal joint (1) is provided on one end surface of the shaft rod of the ball cage universal joint (1), one end of the probe rod (4) passes through the through hole (5) and is located in the inner cavity of the ball cage universal joint (1), and a thermistor is integrally arranged in the probe rod (4); A copper block (6) is arranged at one end of the probe rod (4) extending into the inner cavity of the ball cage universal joint (1); a first annular groove (7) is provided on the inner wall of the ball cage universal joint (1); the copper block (6) is embedded in the inner cavity of the first annular groove (7); the copper block (6) is fixed to the inner wall of the ball cage universal joint (1) by means of a hexagon socket bolt; a connecting hole (8) is coaxially penetrated through the copper block (6) on one side facing the probe rod (4); and the end of the probe rod (4) extending into the through hole (5) is interference-fitted with the connecting hole (8); A second annular groove (9) is provided on the inner wall of the annular groove, and a silicone sealing ring (10) is embedded in the inner cavity of the second annular groove (9); The data processing device (3) comprises a mounting shell (11), a data processor (12) and a wireless Bluetooth transmitter (13) arranged in the inner cavity of the mounting shell (11); the data processor (12) is electrically connected to the end of the probe rod (4) away from the copper block (6) through a wire; the data processor (12) is electrically connected to the wireless Bluetooth transmitter (13); and a connector (14) is arranged on the outside of one end of the shaft of the ball cage universal joint (1) to facilitate the sensor (2) to monitor the temperature change in the inner cavity of the ball cage universal joint (1) in real time.

2. A universal joint inner cavity temperature detection system according to claim 1, characterized in that: The copper block (6) is truncated cone-shaped, and the end of the copper block (6) with a larger diameter contacts the grease in the inner cavity of the ball cage universal joint (1), while the other end of the copper block (6) abuts against the inner wall of the ball cage universal joint (1).

3. A universal joint inner cavity temperature detection system according to claim 1, characterized in that: The connecting member (14) comprises a protective cover (15) arranged outside the end of the probe rod (4) away from the copper block (6), and a first nut (16) fixed on the outer wall of one end of the protective cover (15). Both ends of the protective cover (15) are connected to the outside. The first nut (16) is threadedly connected to the outer wall of the shaft of the ball cage universal joint (1). The other end of the protective cover (15) is provided with a locking member (17) for fixing the mounting shell (11) in the inner cavity of the protective cover (15).

4. A universal joint inner cavity temperature detection system according to claim 3, characterized in that: A layer of plastic film (18) is bonded to the outer wall of the mounting shell (11), and a two-dimensional code for pairing and connecting with the wireless Bluetooth transmitter (13) is printed on the side of the plastic film (18) facing away from the mounting shell (11). A layer of transparent glass cover (19) is fixed to the outer wall of the mounting shell (11), and the plastic film (18) is located in the inner cavity of the transparent glass cover (19).

5. A universal joint inner cavity temperature detection system according to claim 4, characterized in that: The locking member (17) comprises a plurality of second nuts (20) welded to the inner wall of the protective cover (15), and a transparent cover plate (21) arranged outside the end of the protective cover (15) away from the first nut (16), wherein the transparent cover plate (21) is fixedly connected to the mounting shell (11), and the transparent cover plate (21) is threadedly connected to the inner cavity of the second nut (20) via bolts.

6. A method for detecting the temperature of the inner cavity of a universal joint, characterized in that: The following steps are involved: S1: opening a through hole (5): opening a through hole (5) on the end surface of the shaft rod at one end of the ball cage type universal joint (1) along the axial direction of the shaft rod, so that the through hole (5) is connected to the inner cavity of the ball cage type universal joint (1); Installation of S2 copper block (6): remove the dust cover of the ball cage universal joint (1), and install the truncated cone copper block (6) with the connection hole (8) on the inner wall of the ball cage universal joint (1), and perform sealing treatment to prevent the grease from flowing out of the through hole (5); S3 fixes the protective cover (15) and the probe rod (4): the end of the probe rod (4) away from the mounting shell (11) passes through the through hole (5) and is inserted into the inner cavity of the connecting hole (8), the probe rod (4) and the connecting hole (8) are interference fit, and the first nut (16) is threadedly connected to the outer wall of the shaft of the ball cage universal joint (1); S4 Bluetooth pairing and testing: Use a mobile phone to scan the QR code on the outer wall of the mounting shell (11) to perform Bluetooth pairing and enter the official account page to enter the device model of the corresponding wireless Bluetooth transmitter (13). After the Bluetooth pairing connection is completed, real-time data monitoring is performed through bench tests and road tests.

Images