A dynamic and static balance detection device for trailer axle

Abstract

The present invention relates to the technical field of axle balance test, and discloses a dynamic and static balance detection device for a trailer axle, comprising a device base, an axle mounting seat and two sets of linear tracks are installed on the device base, the two sets of linear tracks are located on both sides of the axle mounting seat, and two sets of arc tracks are slidably installed on the two sets of linear tracks. The present invention provides loads for both ends of the trailer axle assembly in the form of two sets of telescopic push rods and mounting sleeves, and can achieve loads of different angles and different pressures by controlling the two sets of telescopic push rods separately, so as to perform a more comprehensive dynamic and static balance test on the trailer axle assembly; the temperature of the trailer axle is adjusted in real time by a temperature control sleeve and heat-conducting parts inside the sleeves at both ends, and the simultaneous contact of multiple positions can enable the temperature adjustment mechanism to quickly and real-time adjust the temperature of the trailer axle, so as to achieve the relevant parameters of the dynamic and static balance test of the axle at a fixed temperature or a variable temperature.

Description

Technical Field

[0001] The invention relates to the technical field of axle balance testing, and in particular to a dynamic and static balance detection device for a trailer axle. Background Art

[0002] Due to its large size and high load requirements, the axles of trailers need to bear significant dynamic loads. In actual driving, the imbalance of the axles may cause unnecessary vibration and stress, which not only affects driving comfort, but also may cause premature wear of tires, suspension systems and axles themselves. In addition, imbalance problems may also cause vehicle handling performance to decline and increase the risk of traffic accidents. In the design and manufacturing process of trailer axle assemblies, the dynamic and static balance test of the axle is a crucial quality control link. Traditional dynamic balance tests are usually performed when the wheels or axles are rotating. The force and torque generated during rotation are reduced by measuring and correcting the imbalance. The static balance test is performed when the axle is stationary to ensure that the mass distribution of the axle is even and there is no eccentricity.

[0003] The prior art discloses a trailer axle assembly test device (Announcement No. CN118225319B). This invention realizes the dynamic and static balance test of trailer axles of different models and sizes. A variety of test sensors are integrated on the test frame to monitor and record the dynamic response and static position deviation of the axle during the test in real time. The installation mechanism can accurately dock and install the trailer axle to be tested through the moving block and the docking seat. The moving adjustment of the moving block can adapt to trailer axles of various sizes, thereby improving the applicability and flexibility of the test equipment. However, this solution still has the following problems:

[0004] The load addition method provided in the axle test process of this application cannot quantify the different load conditions at both ends of the axle. In the actual operation of the trailer, unbalanced load force on the axle is a more common situation. In addition, the temperature of the axle during the operation of the trailer is a key factor for the dynamic and static balance of the axle, which is often ignored in the dynamic and static balance tests in the prior art. For this reason, we need to provide a dynamic and static balance detection device for the trailer axle. Summary of the invention

[0005] The purpose of the present invention is to provide a technical solution for performing a dynamic and static balance test on a trailer axle assembly when adding an asymmetric load, while taking into account the temperature factor of the axle, so as to solve the problems in the prior art raised in the above background technology.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A static and dynamic balance detection device for a trailer axle comprises a device base, on which an axle mounting seat and two sets of linear tracks are mounted, the two sets of linear tracks are located on both sides of the axle mounting seat, and two sets of arc tracks are slidably mounted on the two sets of linear tracks;

[0008] The axle mounting seat is used to mount the trailer axle assembly to be tested, and a telescopic push rod is drivably mounted on the bottom of the two sets of arc-shaped tracks, and a mounting sleeve is arranged on the piston rod of the telescopic push rod. The mounting sleeve is sleeved on the force-bearing positions at both ends of the trailer axle assembly, and the mounting sleeve applies pressure loads at different angles when the trailer axle assembly is subjected to a dynamic and static balance test. At the same time, the mounting sleeve reciprocates along the axial direction of the axle at the force-bearing position of the trailer axle assembly during the dynamic and static balance test.

[0009] The axle mounting seat is provided with a temperature regulating mechanism, which includes a temperature control sleeve and a heat conductive member. The heat conductive member is arranged inside the mounting sleeve. The temperature control sleeve is detachably mounted on the middle part of the trailer axle assembly. The temperature of the trailer axle assembly is regulated by the middle temperature control sleeve and the mounting sleeves at both ends.

[0010] Preferably, a walking assembly is installed in the track at the bottom of the arc track, a rotating connecting piece is installed at the bottom of the walking assembly, the telescopic push rod is rotatably installed on the walking assembly through the rotating connecting piece, a contact roller is installed inside the mounting sleeve, and the contact roller fits the surface of the axle after the mounting sleeve is sleeved on the axle.

[0011] Preferably, the mounting sleeve comprises two groups of arc sleeves hingedly mounted, fixing buckles are mounted on the two groups of arc sleeves, the two groups of arc sleeves can be opened and closed by the fixing buckles to achieve the installation of the mounting sleeve on the trailer axle assembly, a rotating seat is mounted on the inner wall of the arc sleeve, and the contact roller is rotatably mounted inside the arc sleeve via the rotating seat.

[0012] Preferably, the contact roller is configured as a cambered groove wheel to fit the surface of the trailer axle, and the contact rollers inside the mounting sleeve are configured as a plurality of groups distributed in a ring array.

[0013] Preferably, a reciprocating screw and a driver are installed on one side of the linear track, and a slider is provided on the linear track. The slider is engaged inside the linear track and can slide. The slider is driven by the reciprocating screw and the driver to perform reciprocating motion to realize the reciprocating movement of the installation sleeve.

[0014] Preferably, the temperature regulating mechanism includes a temperature controller, a movable track is installed on the axle mounting seat, two groups of temperature control sleeves and movable tracks are provided, the two groups of temperature control sleeves are installed on the axle mounting seat through the movable track, and the two groups of temperature control sleeves can be moved to open and close to install the trailer axle assembly.

[0015] Preferably, the temperature controller is connected with a connecting wire, and the connecting wire is connected to the heat-conducting part inside the mounting sleeve. The trailer axle assembly realizes real-time temperature regulation of the trailer axle through the temperature control sleeve and the heat-conducting parts inside the mounting sleeves at both ends.

[0016] Preferably, it also includes a thrust output controller of the telescopic push rod, and the mounting sleeve is also provided with a fixing seat for mounting and cooperating with the piston rod of the telescopic push rod, and a pressure sensor is arranged inside the fixing seat. The pressure loads of the two groups of telescopic push rods on the trailer axle are respectively controlled by the thrust output controller to realize the asymmetric pressure load dynamic and static balance test of the trailer axle assembly.

[0017] Preferably, the telescopic push rod is configured as a hydraulic push rod, support members are provided on both sides of the telescopic push rod, the outer sleeve of the telescopic push rod is provided with a fixing sleeve, one end of the support member is rotatably mounted on the fixing sleeve, and one end of the support member is rotatably mounted on the rotating connecting member, and the support member provides lateral supporting force for the telescopic push rod.

[0018] Preferably, the axle mounting seat is equipped with an installation fixture for positioning and installing the trailer axle assembly, and the axle mounting seat is also equipped with a drive motor for rotating the trailer axle assembly. Rotation test assemblies are installed at both ends of the axle mounting seat, and the rotation test assemblies perform real-time monitoring of dynamic and static balance data of both ends of the trailer axle.

[0019] Technical effects and advantages of the present invention: Compared with the prior art, the static and dynamic balance detection device for a trailer axle proposed by the present invention has the following advantages:

[0020] The present invention sets two groups of telescopic push rods through the matching form of a straight track and an arc track. The telescopic push rods can provide loads for both ends of the trailer axle assembly in the form of an installation sleeve. Loads of different angles and different pressures can be achieved by separately controlling the two groups of telescopic push rods, so as to perform a more comprehensive dynamic and static balance test on the trailer axle assembly; real-time temperature adjustment of the trailer axle is achieved through a temperature control sleeve and heat-conducting parts inside the sleeves installed at both ends. Simultaneous contact of multiple positions can enable the temperature adjustment mechanism to quickly and real-time adjust the temperature of the trailer axle, so as to achieve relevant parameters of the dynamic and static balance test of the axle at a fixed temperature or a variable temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the trailer axle assembly testing equipment of the present invention;

[0022] Figure 2 It is a front structural schematic diagram of the trailer axle assembly testing device of the present invention;

[0023] Figure 3It is a side structural schematic diagram of the trailer axle assembly testing equipment of the present invention;

[0024] Figure 4 It is a partial structural schematic diagram of the trailer axle assembly testing equipment of the present invention;

[0025] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 6 It is a schematic diagram of structures such as a straight track and a curved track in the present invention;

[0027] Figure 7 It is a schematic diagram of the structures such as the axle mounting seat and the telescopic push rod in the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the telescopic push rod and the installation sleeve in the present invention;

[0029] Fig. 9 It is a schematic diagram of the internal structure of the installation sleeve in the present invention.

[0030] In the figure:

[0031] 11. Equipment base; 12. Linear track; 13. Curved track; 14. Axle mounting seat; 15. Telescopic push rod; 16. Mounting sleeve; 17. Mounting fixture; 18. Fixed seat; 19. Rotating test assembly; 110. Traveling assembly; 111. Rotating connector; 112. Reciprocating screw rod; 113. Slider; 114. Driver; 115. Support; 116. Fixed sleeve; 161. Curved sleeve; 162. Fixing buckle; 163. Rotating seat; 164. Contact roller; 2. Temperature adjustment mechanism; 21. Temperature controller; 22. Moving track; 23. Temperature control sleeve; 24. Connecting wire. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed. In addition, the features described in some examples may also be combined in other examples.

[0033] The invention provides Figures 1 to 3As shown, a dynamic and static balance detection device for a trailer axle includes a device base 11, on which an axle mounting seat 14 and two sets of linear tracks 12 are installed. The two sets of linear tracks 12 are located on both sides of the axle mounting seat 14, and two sets of arc tracks 13 are slidably installed on the two sets of linear tracks 12;

[0034] The axle mounting seat 14 is used to mount the trailer axle assembly to be tested. A telescopic push rod 15 is drivably mounted on the bottom of the two sets of arc-shaped tracks 13. A mounting sleeve 16 is arranged on the piston rod of the telescopic push rod 15. The mounting sleeve 16 is sleeved on the stress-bearing positions at both ends of the trailer axle assembly. The mounting sleeve 16 applies pressure loads at different angles when the trailer axle assembly is subjected to dynamic and static balance tests. At the same time, the mounting sleeve 16 reciprocates along the axial direction of the axle at the stress-bearing position of the trailer axle assembly during the dynamic and static balance tests. A temperature regulating mechanism 2 is arranged on the axle mounting seat 14. The temperature regulating mechanism 2 includes a temperature control sleeve 23 and a heat conductive member. The heat conductive member is arranged inside the mounting sleeve 16. The temperature control sleeve 23 is detachably sleeved on the middle part of the trailer axle assembly. The temperature of the trailer axle assembly is adjusted by the middle temperature control sleeve 23 and the mounting sleeves 16 at both ends.

[0035] Working principle: Axle installation and positioning, the trailer axle assembly is fixed and positioned by the axle mounting seat 14 to ensure that the axle assembly is stably and correctly installed on the test equipment during the test; load application mechanism, two sets of arc tracks 13 are slidably installed on the two sets of linear tracks 12, and a telescopic push rod 15 that can be driven to slide is installed at the bottom of the arc track 13. The piston rod of the telescopic push rod 15 is provided with a mounting sleeve 16, which is sleeved at the two end force positions of the axle assembly, and can apply pressure loads of different angles when performing dynamic and static balance tests; dynamic load simulation, the mounting sleeve 16 not only applies pressure loads, but also reciprocates along the axial direction of the axle during the test, simulating the dynamic load on the axle in actual use; temperature adjustment mechanism, the temperature adjustment mechanism 2 on the axle mounting seat 14 includes a temperature control sleeve 23 and a heat conductor, the heat conductor is built into the mounting sleeve 16, and the temperature control sleeve 23 is detachably sleeved in the middle of the axle assembly. Through this design, the temperature of the axle assembly can be accurately adjusted to simulate the test environment under different temperature conditions; accurate load simulation, by installing the sleeve 16 to apply pressure loads at different angles, it is possible to accurately simulate various load conditions that the axle may encounter in actual use; dynamic testing capability, the reciprocating movement ability of the installing sleeve 16 enables the test equipment to simulate dynamic load conditions and provide test results that are closer to actual working conditions; temperature influence considerations, through the temperature adjustment mechanism 2, the impact of temperature changes on the dynamic and static balance of the axle can be evaluated, which is crucial for understanding the performance of the axle under different environmental conditions; improve test efficiency and accuracy, the structural design of the equipment allows rapid adjustment and multiple tests, which improves the efficiency and accuracy of the test; comprehensive test coverage, combined with the test capabilities of dynamic load and temperature regulation, the equipment can provide a more comprehensive axle performance evaluation, thereby improving the reliability and safety of the axle assembly.

[0036] like Figure 2 and Figure 3 As shown, in order to provide an operating method of the telescopic push rod 15 on the curved track 13, a traveling assembly 110 is installed in the track at the bottom of the curved track 13, a rotating connector 111 is installed at the bottom of the traveling assembly 110, the telescopic push rod 15 is rotatably installed on the traveling assembly 110 through the rotating connector 111, a contact roller 164 is installed inside the mounting sleeve 16, and after the mounting sleeve 16 is sleeved on the axle, the contact roller 164 fits the surface of the axle.

[0037] like Figure 8 and Fig. 9As shown, regarding the specific structure of the installation sleeve 16 and its interior, the installation sleeve 16 includes two sets of arc sleeves 161 that are hingedly installed, and the two sets of arc sleeves 161 are installed with fixing buckles 162. The two sets of arc sleeves 161 can be opened and closed by the fixing buckles 162 to achieve the installation of the installation sleeve 16 on the trailer axle assembly. A rotating seat 163 is installed on the inner wall of the arc sleeve 161, and the contact roller 164 is rotatably installed inside the arc sleeve 161 through the rotating seat 163. The contact roller 164 is configured as an arc groove wheel to fit the surface of the trailer axle, and the contact rollers 164 inside the installation sleeve 16 are configured as multiple groups distributed in a ring array.

[0038] like Figures 4 to 6 As shown, a reciprocating screw 112 and a driver 114 are installed on one side of the linear rail 12, and a slider 113 is provided on the linear rail 12. The slider 113 is engaged inside the linear rail 12 and can slide. The slider 113 is driven by the reciprocating screw 112 and the driver 114 to perform reciprocating motion to realize the reciprocating movement of the installation sleeve 16.

[0039] like Figure 3 and Figure 4 As shown, regarding the specific structure of the temperature regulating mechanism 2, the temperature regulating mechanism 2 includes a temperature controller 21, a movable track 22 is installed on the axle mounting seat 14, and two groups of temperature control sleeves 23 and movable track 22 are provided. The two groups of temperature control sleeves 23 are installed on the axle mounting seat 14 through the movable track 22, and the two groups of temperature control sleeves 23 can be moved to open and close to install the trailer axle assembly. The temperature controller 21 is connected to a connecting wire 24, and the connecting wire 24 is connected to the heat conductive part inside the mounting sleeve 16. The trailer axle assembly realizes real-time temperature regulation of the trailer axle through the temperature control sleeve 23 and the heat conductive parts inside the mounting sleeves 16 at both ends.

[0040] Not shown in the figure, it also includes a thrust output controller of the telescopic push rod 15, such as Figure 7 As shown, the mounting sleeve 16 is also provided with a fixing seat 18 for mounting and cooperating with the piston rod of the telescopic push rod 15, and a pressure sensor is arranged inside the fixing seat 18. The pressure loads of the two sets of telescopic push rods 15 on the trailer axle are respectively controlled by the thrust output controller to realize the asymmetric pressure load dynamic and static balance test of the trailer axle assembly.

[0041] Specifically, Figures 7 to 9As shown, the telescopic push rod 15 is set as a hydraulic push rod, and supports 115 are set on both sides of the telescopic push rod 15. The outer sleeve of the telescopic push rod 15 is provided with a fixing sleeve 116. One end of the support member 115 is rotatably mounted on the fixing sleeve 116, and one end of the support member 115 is rotatably mounted on the rotating connector 111. The support member 115 provides lateral support force for the telescopic push rod 15. The axle mounting seat 14 is equipped with a mounting fixture 17 for positioning and mounting the trailer axle assembly. The axle mounting seat 14 is also equipped with a driving motor for rotating the trailer axle assembly. The two ends of the axle mounting seat 14 are equipped with a rotation test assembly 19. The rotation test assembly 19 performs real-time monitoring of dynamic and static balance data of the two ends of the trailer axle.

[0042] In summary, the present invention has the following comprehensive effects: asymmetric load application, through the two sets of linear tracks 12 and arc tracks 13 on the equipment base 11, in conjunction with the telescopic push rod 15 and the mounting sleeve 16, loads of different angles and pressures can be applied to both ends of the trailer axle assembly. The piston rod of the telescopic push rod 15 is provided with mounting sleeves 16, which are sleeved on the force-bearing positions at both ends of the axle, and can apply pressure loads during dynamic and static balance tests, and reciprocate along the axial direction of the axle; temperature regulation, the axle mounting seat 14 is provided with a temperature regulation mechanism 2, including a temperature control sleeve 23 and a heat conductor. The heat-conducting part is installed inside the mounting sleeve 16, and the temperature-control sleeve 23 is detachably mounted on the middle part of the axle assembly. The temperature of the axle is adjusted by the temperature-control sleeve 23 and the heat-conducting part inside the mounting sleeve 16 to simulate the temperature changes under actual working conditions. For real-time monitoring and control, the equipment includes a thrust output controller and a pressure sensor, which can respectively control the pressure load of the two groups of telescopic push rods 15 on the axle to realize the dynamic and static balance test of asymmetric pressure load. At the same time, rotating test assemblies 19 are installed at both ends of the axle mounting seat 14 to monitor the dynamic and static balance data of both ends of the axle in real time; comprehensive dynamic and static balance tests can perform more comprehensive dynamic and static balance tests on the trailer axle assembly, and loads of different angles and pressures can be achieved by controlling two sets of telescopic push rods 15 separately, which is closer to the unbalanced load conditions of the axle in actual work; temperature factors are taken into consideration, considering the impact of temperature changes of the axle during work on the dynamic and static balance, and real-time temperature adjustment of the axle is achieved through the temperature adjustment mechanism 2, so that the dynamic and static balance parameters of the axle at fixed or changing temperatures can be tested; improve test accuracy, by precisely controlling the angle and pressure applied by the load, and real-time monitoring the temperature of the axle, the accuracy and reliability of the test are improved; simulate actual working conditions, by simulating different loads and temperature conditions that the axle may encounter in actual work, the performance and durability of the axle can be more accurately evaluated; improve test efficiency, the design of the equipment allows for rapid adjustment and setting of different test conditions, which improves the efficiency and flexibility of the test.

[0043] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A dynamic and static balance detection device for a trailer axle, characterized in that: The device comprises a device base (11), wherein an axle mounting seat (14) and two sets of linear tracks (12) are mounted on the device base (11), the two sets of linear tracks (12) are located on both sides of the axle mounting seat (14), and two sets of arc tracks (13) are slidably mounted on the two sets of linear tracks (12); The axle mounting seat (14) is used to mount the trailer axle assembly to be tested. A telescopic push rod (15) is drivably slidably mounted at the bottom of the two sets of arc-shaped tracks (13). A mounting sleeve (16) is arranged on the piston rod of the telescopic push rod (15). The mounting sleeve (16) is sleeved on the stress-bearing positions at both ends of the trailer axle assembly. The mounting sleeve (16) applies pressure loads at different angles when the trailer axle assembly is subjected to a dynamic and static balance test. At the same time, the mounting sleeve (16) reciprocates along the axial direction of the axle at the stress-bearing position of the trailer axle assembly during the dynamic and static balance test. The axle mounting seat (14) is provided with a temperature regulating mechanism (2), the temperature regulating mechanism (2) comprising a temperature controlling sleeve (23) and a heat conducting member, the heat conducting member being arranged inside the mounting sleeve (16), the temperature controlling sleeve (23) being detachably mounted on the middle part of the trailer axle assembly, the temperature of the trailer axle assembly being regulated by the middle temperature controlling sleeve (23) and the mounting sleeves (16) at both ends; A travel assembly (110) is installed in the track at the bottom of the arc track (13); a rotating connection piece (111) is installed at the bottom of the travel assembly (110); the telescopic push rod (15) is rotatably installed on the travel assembly (110) via the rotating connection piece (111); a contact roller (164) is installed inside the installation sleeve (16); after the installation sleeve (16) is sleeved on the axle, the contact roller (164) is in contact with the surface of the axle; The installation sleeve (16) comprises two groups of arc-shaped sleeves (161) which are hingedly installed. Fixing buckles (162) are installed on the two groups of arc-shaped sleeves (161). The two groups of arc-shaped sleeves (161) can be opened and closed by the fixing buckles (162) to achieve installation of the installation sleeve (16) on the trailer axle assembly. A rotating seat (163) is installed on the inner wall of the arc-shaped sleeve (161). The contact roller (164) is rotatably installed inside the arc-shaped sleeve (161) via the rotating seat (163).

2. The dynamic and static balance detection device for a trailer axle according to claim 1, characterized in that: The contact roller (164) is configured as a cambered groove wheel to fit the surface of the trailer axle, and the contact rollers (164) inside the mounting sleeve (16) are configured as a plurality of groups distributed in a ring array.

3. The static and dynamic balance detection device for a trailer axle according to claim 1, characterized in that: A reciprocating screw (112) and a driver (114) are installed on one side of the linear track (12); a slider (113) is provided on the linear track (12); the slider (113) is engaged inside the linear track (12) and is slidable; the slider (113) is driven by the reciprocating screw (112) and the driver (114) to perform reciprocating motion, thereby achieving reciprocating movement of the mounting sleeve (16).

4. The static and dynamic balance detection device for a trailer axle according to claim 3, characterized in that: The temperature regulating mechanism (2) comprises a temperature controller (21); a movable track (22) is mounted on the axle mounting seat (14); two sets of temperature control sleeves (23) and movable track (22) are provided; the two sets of temperature control sleeves (23) are mounted on the axle mounting seat (14) via the movable track (22); the two sets of temperature control sleeves (23) can be moved to open and close so as to install the trailer axle assembly.

5. The static and dynamic balance detection device for a trailer axle according to claim 4, characterized in that: The temperature controller (21) is connected to a connecting wire (24), and the connecting wire (24) is connected to a heat-conducting member inside the mounting sleeve (16). The trailer axle assembly is controlled by the temperature control sleeve (23) and the heat-conducting members inside the mounting sleeves (16) at both ends to achieve real-time temperature regulation of the trailer axle.

6. The dynamic and static balance detection device for a trailer axle according to claim 1, characterized in that: It also includes a thrust output controller for the telescopic push rod (15), the mounting sleeve (16) is also provided with a fixing seat (18) for mounting and cooperating with the piston rod of the telescopic push rod (15), the fixing seat (18) is provided with a pressure sensor inside, and the pressure loads of the two sets of telescopic push rods (15) on the trailer axle are respectively controlled by the thrust output controller, so as to realize the asymmetric pressure load dynamic and static balance test of the trailer axle assembly.

7. The static and dynamic balance detection device for a trailer axle according to claim 1, characterized in that: The telescopic push rod (15) is configured as a hydraulic push rod, and support members (115) are provided on both sides of the telescopic push rod (15). A fixing sleeve (116) is provided on the outside of the telescopic push rod (15), and one end of the support member (115) is rotatably mounted on the fixing sleeve (116). One end of the support member (115) is rotatably mounted on the rotating connecting member (111), and the support member (115) provides lateral support force for the telescopic push rod (15).

8. A static and dynamic balance detection device for a trailer axle according to any one of claims 1 to 7, characterized in that: The axle mounting seat (14) is provided with a mounting fixture (17) for positioning and mounting a trailer axle assembly. The axle mounting seat (14) is also provided with a driving motor for rotationally driving the trailer axle assembly. Rotational testing assemblies (19) are mounted at both ends of the axle mounting seat (14). The rotational testing assemblies (19) monitor the dynamic and static balance data of both ends of the trailer axle in real time.

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