Selection of pads, devices, vehicle rear axle and installation methods

Abstract

This application relates to the field of transmission equipment technology, and discloses a shim selection method, device, vehicle rear axle, and installation method. The shim selection method includes: pressing the outer rings of the inner bearing and the outer bearing onto the half-shaft housing, and then inserting the corresponding bearing inner ring; applying pressure to the inner bearing to make its clearance zero, and obtaining the distance H2 between the outer end faces of the inner bearing and the outer bearing; obtaining the distance H1 from the mounting end face of the outer bearing on the drive shaft to the top of the drive shaft, and calculating the required shim thickness S2 using a formula, where S2 = H1 - H2 - S1 - L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end of the transmission mechanism to the contact surface of the mounting plate. The shim selection method disclosed in this application has high selection accuracy and can extend the bearing service life.

Description

Technical Field

[0001] This application belongs to the field of transmission equipment technology, specifically relating to a pad selection method, device, vehicle rear axle and installation method. Background Technology

[0002] The rear drive axle is a crucial component of a vehicle's transmission system. Bearings provide rotational support between the drive shaft and the axle housing. Especially in agricultural machinery, the rear drive axle is a vital load-bearing and transmission component, serving both as a gear shifting (transmission mechanism) and a transmission mechanism. However, the quality of bearing assembly and adjustment directly impacts transmission performance. Excessive or insufficient bearing clearance directly affects bearing lifespan and can easily lead to bearing burn-out, seizure, and other quality problems.

[0003] Therefore, it is necessary to select appropriate adjusting shims to adjust the bearing clearance so that the bearing meets the specified requirements. In the existing assembly process, the adjusting shim is first adjusted by measuring the assembled drive shaft, for example, measuring the height difference H between the drive shaft end face and the bearing end face, and then measuring the distance L between the mounting plate (which abuts against the drive shaft end face during assembly) and the mounting end face of the transmission mechanism. The formula is then used: HL - S1 (standard bearing clearance value) = S2. Based on the value of S2, an adjusting shim of appropriate thickness is selected for assembling the transmission mechanism and drive shaft.

[0004] When pressing the inner ring of the bearing, since the inner ring and the drive shaft are in an overfit condition, the frictional resistance between the bearing inner ring and the drive shaft needs to be overcome when pressing downwards. This frictional resistance varies depending on the different parts, so it is impossible to accurately determine whether the bearing inner ring has been pressed to a zero clearance state. Therefore, the measured height difference H has a large error, which means that the thickness S2 of the selected adjusting shim cannot meet the installation requirements. This will still affect the service life of the bearing and easily cause quality problems such as bearing burning and seizing. Summary of the Invention

[0005] The purpose of this application is to provide a shim selection method, device, vehicle rear axle, and installation method to solve the problem that the existing shim selection method has large errors in the selected adjustment shims, which affects the service life of the bearing and easily causes bearing burning, seizing, and other quality problems.

[0006] To achieve the above objectives, the first aspect of this application provides a method for selecting and installing tapered bearings on a vehicle rear axle drive shaft, applied to a vehicle rear axle. The vehicle rear axle includes a half-shaft housing, a drive shaft, and a transmission mechanism. The drive shaft passes through the half-shaft housing, and the top end of the drive shaft is inserted into the drive end of the transmission mechanism and is connected to the transmission mechanism and the drive shaft by a mounting plate. Along the length direction of the drive shaft, tapered bearings are provided at both ends of the half-shaft housing. The tapered bearing closer to the transmission mechanism is defined as the inner bearing, and the tapered bearing farther from the transmission mechanism is defined as the outer bearing.

[0007] The method for selecting shims for installing the tapered bearing of the vehicle's rear axle drive shaft includes:

[0008] S10: Press the inner bearing and the outer ring of the outer bearing onto the half-shaft housing, and then insert the corresponding bearing inner ring;

[0009] S20: Apply pressure to the inner bearing so that the clearance of the inner bearing is 0, and obtain the distance H2 between the outer end faces of the inner bearing and the outer bearing;

[0010] S30: Obtain the distance H1 from the mounting end face of the outer bearing on the drive shaft to the top of the drive shaft, and calculate the required thickness S2 of the adjusting shim using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end of the transmission mechanism to the contact surface of the mounting plate.

[0011] As a further improvement to the above technical solution:

[0012] In some embodiments, the pressure applied to the inner bearing in step S20 is equal to the pressure required for the inner bearing clearance to be 0.

[0013] Distances H1, H2, and L1 are measured using distance sensors and / or displacement sensors.

[0014] A second aspect of this application provides a shim selection device, applied to the shim selection method for installing a tapered bearing on a vehicle rear axle drive shaft according to the first aspect described above, the shim selection device comprising:

[0015] Measurement module, used to measure distances H1, H2, and L1; and

[0016] A controller is communicatively connected to the measurement module and is configured to calculate the required thickness S2 of the adjustment shim based on data H1, H2, and L1.

[0017] A third aspect of this application provides a vehicle rear axle, including a half-shaft housing, a drive shaft, and a transmission mechanism. The drive shaft passes through the half-shaft housing, and the top end of the drive shaft is inserted into the drive end of the transmission mechanism and is connected to the transmission mechanism and the drive shaft by a mounting plate. Along the length direction of the drive shaft, the two ends of the half-shaft housing are respectively provided with an inner bearing and an outer bearing.

[0018] An adjustment shim, selected according to the vehicle rear axle drive shaft tapered bearing installation shim selection method provided in the first aspect, is provided between the inner bearing and the drive end of the transmission mechanism.

[0019] A fourth aspect of this application provides a method for installing a rear axle of a vehicle, applied to the rear axle of a vehicle provided according to the third aspect above, the method comprising:

[0020] S100: Press the inner bearing and the outer ring of the outer bearing onto the half-shaft housing, and then insert the corresponding bearing inner ring;

[0021] S200: Apply pressure to the inner bearing so that the clearance of the inner bearing is 0, and obtain the distance H2 between the outer end faces of the inner bearing and the outer bearing;

[0022] S300: Obtain the distance H1 from the mounting end face of the outer bearing on the drive shaft to the top of the drive shaft, and calculate the required thickness S2 of the adjusting shim using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end of the transmission mechanism to the contact surface of the mounting plate.

[0023] S400: Press the inner ring of the outer bearing onto the drive shaft, then install the drive shaft into the half-shaft housing, and then press the inner ring of the inner bearing onto the drive shaft;

[0024] S500: Install the adjusting shim and the speed change mechanism with a thickness of S2.

[0025] As a further improvement to the above technical solution:

[0026] In some embodiments, during step S400, when pressing the inner ring of the inner bearing, the distance H3 between the inner ring and the top surface of the drive shaft is controlled within a specified clearance.

[0027] Where H3 = H1 - H2 - S1.

[0028] In some embodiments, when pressing the inner ring of the inner bearing into the inner bearing, the distance H3 is controlled by a displacement sensor or a distance sensor.

[0029] In some embodiments, installing the transmission mechanism in step S500 includes:

[0030] Insert the top end of the drive shaft into the drive end of the transmission mechanism, and make the top end of the drive shaft abut against the mounting plate built into the transmission mechanism.

[0031] The mounting plate is fixedly connected to the drive shaft using fasteners.

[0032] In some embodiments, the vehicle rear axle mounting method further includes:

[0033] S600: After installation, re-measure the rotational torque of the half-shaft housing;

[0034] S700: Installation ends after passing the retest;

[0035] S800: If the retest fails, reassembly and adjustment shall be carried out.

[0036] Compared to existing technologies, this application provides a shim selection method, device, vehicle rear axle, and installation method. The shim selection method described above is performed before the drive shaft and half-shaft housings are assembled. Furthermore, the distance H2 between the outer end faces of the inner bearing and the outer bearing is measured by applying pressure to the inner bearing until its clearance is zero. This results in a more accurate calculated thickness S2 for the adjusting shim, allowing for the selection of more suitable shims. After assembly and use, this effectively extends the bearing's service life and reduces quality problems such as bearing burn-out and seizing.

[0037] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0038] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0039] Figure 1 A partial structural schematic diagram of an assembled vehicle rear axle provided in an embodiment of this application;

[0040] Figure 2 A flowchart illustrating a method for selecting a shim for installing a tapered bearing on a vehicle rear axle driveshaft, as provided in an embodiment of this application.

[0041] Figure 3 for Figure 1The diagram shows a mechanism in which the drive shaft of the rear axle of a vehicle is press-fitted with the inner ring of the bearing and the outer bearing.

[0042] Figure 4 A schematic diagram of a half-shaft housing with an inner bearing and an outer bearing respectively installed at both ends, provided in an embodiment of this application;

[0043] Figure 5 A partial structural schematic diagram of a speed-changing mechanism provided in an embodiment of this application;

[0044] Figure 6 A flowchart illustrating a method for installing a vehicle rear axle according to an embodiment of this application;

[0045] Figure 7 This is a schematic diagram illustrating the structure for controlling the distance H3 between the inner ring of the bearing and the top surface of the drive shaft when assembling the drive shaft and the half-shaft housing and then assembling the inner ring of the inner bearing, under a specified clearance, according to an embodiment of this application.

[0046] Explanation of reference numerals in the attached figures

[0047] 100. Half-shaft housing;

[0048] 200, drive shaft; 210, top end; 220, mounting end face;

[0049] 300. Gearbox; 310. Drive end; 320. Mounting plate; 330. Fastener;

[0050] 400. Inner bearing;

[0051] 500. External bearing;

[0052] 600. Adjust the shims. Detailed Implementation

[0053] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0054] The present application will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0055] Example 1

[0056] Please see Figure 1 This embodiment provides a method for selecting shims for installing tapered bearings on the rear axle driveshaft of a vehicle, hereinafter referred to as the shim selection method. The shim selection method allows for the selection of suitable adjusting shims 600 for the installation of tapered bearings on the rear axle driveshaft of a vehicle, thereby extending the service life of the tapered bearing and ensuring the safe and stable operation of the vehicle's rear axle.

[0057] The rear axle of the vehicle includes a half-shaft housing 100, a drive shaft 200, and a transmission mechanism 300. The drive shaft 200 passes through the half-shaft housing 100, and its top end 210 is inserted into the drive end 310 of the transmission mechanism 300. The transmission mechanism 300 and the drive shaft 200 are connected by a mounting plate 320. The mounting plate 320 is built into the transmission mechanism 300.

[0058] Along the length of the drive shaft 200, tapered bearings are provided at both ends of the half-shaft housing 100. To more clearly describe the technical solution of this application, the tapered bearing closer to the transmission mechanism 300 is defined as the inner bearing 400, and the tapered bearing farther from the transmission mechanism 300 is defined as the outer bearing 500; the adjusting shim 600 is installed between the inner bearing 400 and the drive end 310 of the transmission mechanism 300 to axially limit the inner bearing 400.

[0059] Existing shim selection methods directly measure and calculate the required shim thickness for the assembly of the half-shaft housing and drive shaft via bearings. This method does not consider the frictional resistance between the inner bearing ring and the drive shaft during press-fitting, as the inner ring and drive shaft have an overfit. This frictional resistance varies depending on the component, making it impossible to accurately determine whether the bearing inner ring has been press-fitted to zero clearance. Consequently, the measured height difference H (the height difference between the drive shaft end face and the bearing end face) has a significant error, leading to errors in the thickness S2 of the selected adjusting shims. Even after installation, the selected adjusting shims may still affect the bearing's service life and cause quality problems such as bearing burning and seizing.

[0060] Please see Figure 2 , Figure 3 , Figure 4 and Figure 5 To solve the above problems, the pad selection method provided in this embodiment includes the following steps:

[0061] S10: Press the outer rings of the inner bearing 400 and the outer bearing 500 onto the half-shaft housing 100, and then insert the corresponding bearing inner rings. When assembling the inner bearing 400 and the outer bearing 500, the drive shaft 200 is not installed inside the half-shaft housing 100. Therefore, this step only assembles the bearings.

[0062] S20: Apply pressure to the inner bearing 400 so that the clearance of the inner bearing 400 is 0, and obtain the distance H2 between the outer end faces of the inner bearing 400 and the outer bearing 500.

[0063] S30: Obtain the distance H1 from the mounting end face 220 of the outer bearing 500 on the drive shaft 200 to the top end 210 of the drive shaft 200, and calculate the required thickness S2 of the adjusting shim 600 using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end 310 of the transmission mechanism 300 to the contact surface of the mounting pressure plate 320.

[0064] In step S20, the pressure applied to the inner bearing 400 is equal to the pressure required for the clearance of the inner bearing 400 to be zero, in order to avoid damaging the bearing.

[0065] Distances H1, H2, and L1 are measured using distance sensors and / or displacement sensors.

[0066] Compared to existing technologies, this embodiment uses the shim selection method described above, which is performed before the drive shaft 200 and the half-shaft housing 100 are assembled. Furthermore, the distance H2 between the outer end faces of the inner bearing 400 and the outer bearing 500 is measured by applying pressure to the inner bearing 400 so that the clearance of the inner bearing 400 is 0. As a result, the thickness S2 of the adjusting shim 600 calculated subsequently has higher accuracy, thus allowing for the selection of a more suitable adjusting shim 600. After assembly and use, this can effectively extend the service life of the bearing and reduce quality problems such as bearing burning and seizing.

[0067] Furthermore, this embodiment also provides a pad selection device. The pad selection device is applied to the pad selection method provided in the above embodiment.

[0068] The shim selection device includes a measuring module and a controller. The measuring module is used to measure distances H1, H2, and L1. The controller is communicatively connected to the measuring module and is configured to calculate the required thickness S2 of the shim 600 based on the data H1, H2, and L1.

[0069] Optionally, the measurement module can be selected as a distance sensor or a displacement sensor. It should be understood that the above are merely illustrative examples and are not intended to limit the scope of protection of this application.

[0070] The pad selection device provided in this embodiment enables the automatic uploading of measurement data and the calculation of the required thickness S2 of the adjustment pad 600, so as to facilitate the subsequent automated production of the vehicle rear axle.

[0071] Example 2

[0072] Please see Figure 1 This embodiment provides a vehicle rear axle, particularly a tractor rear axle, but it can also be a rear axle structure for other vehicles.

[0073] The rear axle of the vehicle includes a half-shaft housing 100, a drive shaft 200, and a transmission mechanism 300. The drive shaft 200 passes through the half-shaft housing 100. The top end 210 of the drive shaft 200 is inserted into the drive end 310 of the transmission mechanism 300 and is connected to the transmission mechanism 300 and the drive shaft 200 through a mounting plate 320. Along the length of the drive shaft 200, the two ends of the half-shaft housing 100 are respectively provided with an inner bearing 400 and an outer bearing 500.

[0074] Among them, an adjustment shim 600, selected according to the shim selection method provided in Embodiment 1, is provided between the inner bearing 400 and the drive end 310 of the speed change mechanism 300.

[0075] Optionally, the transmission mechanism 300 can be a planetary transmission mechanism 300 or a parallel shaft transmission mechanism 300. In this embodiment, the transmission mechanism 300 shown is a planetary transmission mechanism 300, with the top end 210 of the drive shaft 200 inserted into the planet carrier of the planetary transmission mechanism 300. A mounting plate 320 is built into the planet carrier; during assembly, the mounting plate 320 abuts against the top end 210 of the drive shaft 200 and is fixed by fastening screws.

[0076] Please also refer to Figure 6 and Figure 7 Furthermore, this embodiment also provides a method for installing a vehicle rear axle, which is applied to the assembly of the vehicle rear axle provided in Embodiment 2 above.

[0077] In this embodiment, the vehicle rear axle installation method is based on the pad selection method. To save steps, the pad selection method is directly integrated into the installation method, that is, the pad selection operation is carried out during the assembly process.

[0078] Specifically, the installation method for the rear axle of a vehicle includes the following steps:

[0079] S100: Press the outer rings of the inner bearing 400 and the outer bearing 500 onto the half-shaft housing 100, and then insert the corresponding bearing inner rings.

[0080] S200: Apply pressure to the inner bearing 400 so that the clearance of the inner bearing 400 is 0, and obtain the distance H2 between the outer end faces of the inner bearing 400 and the outer bearing 500.

[0081] S300: Obtain the distance H1 from the mounting end face 220 of the outer bearing 500 on the drive shaft 200 to the top end 210 of the drive shaft 200, and calculate the required thickness S2 of the adjusting shim 600 using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end 310 of the transmission mechanism 300 to the contact surface of the mounting plate 320.

[0082] S400: Press the inner ring of the outer bearing 500 onto the drive shaft 200, then install the drive shaft 200 into the half-shaft housing 100, and then press the inner ring of the inner bearing 400 onto the drive shaft 200.

[0083] S500: Install an adjustment shim 600 with a thickness of S2 and a transmission mechanism 300.

[0084] In step S400 above, when pressing the inner ring of the inner bearing 400, the distance H3 between the inner ring of the bearing and the top surface of the drive shaft 200 is controlled under a specified clearance; where H3 = H1 - H2 - S1.

[0085] During the press-fitting of the inner ring of the inner bearing 400, the distance H3 is controlled by a displacement sensor or a distance sensor.

[0086] The installation of the transmission mechanism 300 in step S500 above includes the following steps:

[0087] S510: Insert the top end 210 of the drive shaft 200 into the drive end 310 of the transmission mechanism 300, and make the top end 210 of the drive shaft 200 abut against the mounting plate 320 built into the transmission mechanism 300.

[0088] S520: The mounting plate 320 is fixedly connected to the drive shaft 200 by fastener 330. Fastener 330 is selected as a fastening screw.

[0089] Furthermore, in this embodiment, the vehicle rear axle mounting method further includes:

[0090] S600: After installation, the rotational torque of the half-shaft housing 100 is re-measured;

[0091] S700: Installation ends after passing the retest;

[0092] S800: If the retest fails, reassembly and adjustment shall be carried out.

[0093] The vehicle rear axle and installation method provided in this embodiment have the following advantages:

[0094] The bearing end face height is measured under undisturbed conditions, resulting in more accurate data; the installation and adjustment process controls the precise installation position without damaging the bearing.

[0095] It should be noted that, in this application, unless otherwise stated, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0096] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for selecting shims for installing a tapered bearing on a vehicle's rear axle driveshaft, characterized in that, The axle is used in the rear axle of a vehicle. The rear axle includes a half-shaft housing (100), a drive shaft (200), and a transmission mechanism (300). The drive shaft (200) passes through the half-shaft housing (100). The top end (210) of the drive shaft (200) is inserted into the drive end (310) of the transmission mechanism (300) and is connected to the transmission mechanism (300) and the drive shaft (200) by means of a mounting plate (320). Along the length of the drive shaft (200), both ends of the half-shaft housing (100) are provided with tapered bearings. The tapered bearing closer to the transmission mechanism (300) is defined as the inner bearing (400), and the tapered bearing farther away from the transmission mechanism (300) is defined as the outer bearing (500). The method for selecting shims for installing the tapered bearing of the vehicle's rear axle drive shaft includes: S10: Press the outer rings of the inner bearing (400) and the outer bearing (500) onto the half-shaft housing (100), and then insert the corresponding bearing inner rings; S20: Apply pressure to the inner bearing (400) so that the clearance of the inner bearing (400) is 0, and obtain the distance H2 between the outer end faces of the inner bearing (400) and the outer bearing (500); S30: Obtain the distance H1 from the mounting end face (220) of the outer bearing (500) on the drive shaft (200) to the top end (210) of the drive shaft (200), and calculate the required thickness S2 of the adjusting shim (600) using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end (310) of the transmission mechanism (300) to the abutment surface of the mounting pressure plate (320).

2. The method for selecting shims for installing the tapered bearing of the rear axle drive shaft of a vehicle according to claim 1, characterized in that, The pressure applied to the inner bearing (400) in S20 is equal to the pressure required for the clearance of the inner bearing (400) to be 0.

3. The method for selecting shims for installing the tapered bearing of the rear axle drive shaft of a vehicle according to claim 1, characterized in that, Distances H1, H2, and L1 are measured using distance sensors and / or displacement sensors.

4. A pad selection device, characterized in that, The method for selecting shims for mounting tapered bearings on the rear axle drive shaft of a vehicle according to any one of claims 1-3, wherein the shim selection device comprises: Measurement module, used to measure distances H1, H2, and L1; and A controller, which is communicatively connected to the measuring module, is configured to calculate the required thickness S2 of the adjustment shim (600) based on data H1, H2 and L1.

5. A vehicle rear axle, characterized in that, The device includes a half-shaft housing (100), a drive shaft (200), and a transmission mechanism (300). The drive shaft (200) passes through the half-shaft housing (100). The top end (210) of the drive shaft (200) is inserted into the drive end (310) of the transmission mechanism (300) and is connected to the transmission mechanism (300) and the drive shaft (200) by means of a mounting plate (320). Along the length of the drive shaft (200), the two ends of the half-shaft housing (100) are respectively provided with an inner bearing (400) and an outer bearing (500). An adjusting shim (600) selected according to the vehicle rear axle drive shaft tapered bearing installation shim selection method described in any one of 1-3 is provided between the inner bearing (400) and the drive end (310) of the transmission mechanism (300).

6. A method for installing a vehicle rear axle, characterized in that, Applied to the rear axle of the vehicle according to claim 5, the method for installing the rear axle of the vehicle includes: S100: Press the outer rings of the inner bearing (400) and the outer bearing (500) onto the half-shaft housing (100), and then insert the corresponding bearing inner rings; S200: Apply pressure to the inner bearing (400) so that the clearance of the inner bearing (400) is 0, and obtain the distance H2 between the outer end faces of the inner bearing (400) and the outer bearing (500); S300: Obtain the distance H1 from the mounting end face (220) of the outer bearing (500) on the drive shaft (200) to the top end (210) of the drive shaft (200), and calculate the required thickness S2 of the adjusting shim (600) using the formula, where S2=H1-H2-S1-L1, S1 is the standard clearance value, and L1 is the distance from the end face of the drive end (310) of the transmission mechanism (300) to the abutment surface of the mounting pressure plate (320); S400: Press the inner ring of the outer bearing (500) onto the drive shaft (200), then install the drive shaft (200) into the half-shaft housing (100), and then press the inner ring of the inner bearing (400) onto the drive shaft (200). S500: Install the adjusting shim (600) and the speed change mechanism (300) with a thickness of S2.

7. The vehicle rear axle installation method according to claim 6, characterized in that, In S400, when pressing the inner ring of the inner bearing (400) into place, the distance H3 between the inner ring of the bearing and the top surface of the drive shaft (200) is controlled within a specified clearance. Where H3 = H1 - H2 - S1.

8. The method for installing a vehicle rear axle according to claim 7, characterized in that, When pressing the inner ring of the inner bearing (400), the distance H3 is controlled by a displacement sensor or a distance sensor.

9. The method for installing a vehicle rear axle according to claim 6, characterized in that, The installation of the transmission mechanism (300) in S500 includes: Insert the top end (210) of the drive shaft (200) into the drive end (310) of the transmission mechanism (300), and make the top end (210) of the drive shaft (200) abut against the mounting plate (320) built into the transmission mechanism (300); The mounting plate (320) is fixedly connected to the drive shaft (200) by fasteners (330).

10. The method for installing a vehicle rear axle according to any one of claims 6-9, characterized in that, The method for installing the rear axle of the vehicle also includes: S600: After installation, re-measure the rotational torque of the half-shaft housing (100); S700: Installation ends after passing the retest; S800: If the retest fails, reassembly and adjustment shall be carried out.

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