Method for determining gasket specifications during the assembly process of a speed reducer shafting

Abstract

The present invention discloses a method for determining the gasket specification during the assembly process of the reducer shafting. The reducer shafting includes a front housing, a rear housing, a shaft body, a front bearing, and a rear bearing. The front housing is provided with a front bearing chamber, and the rear housing is provided with a rear bearing chamber. The method comprises the following steps: S100: Prepare a housing inspection fixture for simulating the rear housing and assemble the housing inspection fixture, the front housing, and the shaft body; S200: Use a pressing inspection fixture to press the rear bearing with a set acting force; S300: Use a distance measuring inspection fixture to measure the distance value L1 between the end face of the rear bearing and the outer end face of the housing inspection fixture; S400: The designed distance value between the upper end face of the housing inspection fixture and the first joint surface is L2, and the distance value L between the end face of the rear bearing and the first joint surface is L = L2 - L1. The distance value L3 between the inner wall of the front housing and the second joint surface; S500: The clearance value a between the end face of the rear bearing and the bottom of the rear bearing chamber is a = L3 - L. Select a gasket according to a. Applying the present invention can select a suitable gasket.

Description

Technical Field

[0001] The invention relates to the field of electric drive assemblies, and in particular to a method for determining gasket specifications during the assembly process of a reducer shaft system. Background Art

[0002] The reducer shaft system of the electric drive assembly in new energy vehicles generally includes a front shell and a rear shell, and an input shaft, an intermediate shaft and an output shaft are arranged between the front shell and the rear shell. Bearings are arranged at both ends of the above three shafts, and correspondingly, the front shell and the rear shell are formed with bearing chambers for installing bearings. Since the above three shafts have certain tolerances during manufacturing, there will be a certain gap between the bearing installed at the end of the shaft and the bottom of the bearing chamber after assembly. The existence of the gap may cause the bearing to shift relative to the bearing chamber. Therefore, in actual work, a gasket of appropriate size will be selected during the assembly process of the reducer shaft system and installed at the bottom of the bearing chamber to offset the above gap and form a certain preload force on the bearing. In order to ensure that the size of the gasket matches the above gap, it is necessary to obtain the accurate gap value and then select a gasket of appropriate size.

[0003] It is easy to think that the spacing value between the bottom of the bearing chamber of the front shell and the bottom of the bearing chamber of the rear shell can be obtained first, and then the total length value of the corresponding assembled shaft and sleeve can be obtained. The difference between the above spacing value and the total length value is the gap value between the bearing end face and the bottom of the bearing chamber. However, in actual operation, the spacing value between the bottom of the bearing chamber of the front shell and the bottom of the bearing chamber of the rear shell is difficult to measure (the front shell and the rear shell need to be assembled before measurement, but after assembly, the distance measuring instrument cannot be inserted into the interior for measurement). Therefore, the design size between the bottom of the bearing chamber of the front shell and the bottom of the bearing chamber of the rear shell is used in the prior art. However, there is a tolerance in the manufacturing process, and the design size is different from the actual size, which is not an accurate value consistent with the actual situation. In addition, after the assembly is completed, the goal is to eliminate the gap through the gasket and form a certain clamping force on the bearing. In the two cases where the bearing is clamped and the bearing is not clamped, there is a difference in the total length value of the bearing and the shaft. In the prior art, the total length of the bearing and the shaft measured when the bearing is not clamped is necessarily larger, and this value is not an accurate value consistent with the actual situation. In summary, the gap value calculated by two numerical values ​​that do not match the actual situation has a large error, and the gasket selected based on this value is likely to fail to achieve its purpose. In actual situations, the gasket selected with this gap value is often too small, so that there is still a gap between the end face of the bearing and the bottom surface of the bearing chamber. Accordingly, the bearing cannot obtain the required clamping force. Summary of the invention

[0004] The invention provides a method for determining the specifications of a gasket during the assembly process of a reducer shaft system, which is used to solve the problem in the prior art that a gasket of a suitable size cannot be selected for the reducer shaft system.

[0005] The present invention adopts the following technical solution: a method for determining the gasket specification during the assembly process of a reducer shafting. The reducer shafting includes a front housing, a rear housing, a shaft body, and a front bearing and a rear bearing assembled at both ends of the shaft body. The front housing is provided with a front bearing chamber for assembling the front bearing, and the rear housing is provided with a rear bearing chamber for assembling the rear bearing. The method includes the following steps:

[0006] S100: Prepare a housing inspection fixture for simulating the rear housing. The housing inspection fixture is provided with a detection window that communicates the rear bearing chamber inside it with the outside; keep the front housing fixed, and tightly fit and install one end of the shaft body with the front bearing assembled thereon into the front bearing chamber of the front housing; align the housing inspection fixture with the front housing for assembly, and during the assembly process, tightly fit and install the end of the shaft body with the rear bearing assembled thereon into the rear bearing chamber of the housing inspection fixture;

[0007] S200: Prepare a pressing inspection fixture for pressing the rear bearing. The pressing inspection fixture includes a pressing plate. The pressing plate extends into the rear bearing chamber through the detection window and presses the rear bearing with a set acting force to simulate the stress condition of the rear bearing after the assembly of the reducer shafting is completed;

[0008] S300: Prepare a distance measuring inspection fixture. The distance measuring inspection fixture is used to measure the distance value L1 between the end face of the rear bearing and the outer end face of the housing inspection fixture;

[0009] S400: There is a first joint surface between the housing inspection fixture and the front housing. The designed distance value between the upper end face of the housing inspection fixture and the first joint surface is L2. Calculate the distance value L between the end face of the rear bearing and the first joint surface through L1 and L2, L = L2 - L1; there is a second joint surface between the front housing and the rear housing, and measure the distance value L3 between the inner wall of the front housing and the second joint surface;

[0010] S500: Calculate the clearance value a between the end face of the rear bearing and the bottom of the rear bearing chamber, a = L3 - L, and determine the gasket with a thickness dimension greater than a and closest to a as the gasket for the assembly of the reducer shafting.

[0011] The present invention has the following beneficial effects: By using a housing fixture to simulate the rear housing, before assembling the reducer shafting, first use the housing fixture to replace the rear housing for assembly to simulate the states of the front housing, rear housing, and shaft body after assembly. A detection window is provided on the housing fixture, and a pressing plate is inserted into the detection window to apply a set force to the rear bearing. This set force can simulate the preloading force of the gasket on the rear bearing after the reducer shafting is assembled under ideal conditions. In this state, use a distance measuring fixture to measure the distance value L1 between the end face of the rear bearing and the outer end face of the housing fixture, then calculate the clearance value a between the end face of the rear bearing and the bottom of the rear bearing chamber based on L2 and L3, and finally select a gasket according to the clearance value a. Select a gasket using the gasket selection method provided by the present invention, and use this gasket for the assembly of the reducer shafting. In the assembled reducer shafting, the clearance between the bearing and the bottom of the bearing chamber can be offset by the gasket, and at the same time, the gasket can apply a certain preloading force to the bearing, and this preloading force is the above-mentioned set force.

[0012] Preferably, the pressing fixture in step S200 further includes a pressure adjusting component and a top rod. The top rod applies a force to the pressing plate, and the size of the force is adjusted to a set force by the pressure adjusting component.

[0013] Preferably, the pressure adjusting component in step S200 includes a fixing plate fixed relative to the rear bearing and an adjusting bolt threadedly connected to the fixing plate. One end of the top rod is tightly fitted or rotatably fitted on the adjusting bolt, and the adjusting bolt is screwed to drive the top rod to move relative to the rear bearing.

[0014] Preferably, a spring is provided between the adjusting bolt and the top rod in step S200. A pushing force is applied to the adjusting bolt through the spring to increase the force required to screw the adjusting bolt. By the spring generating a pushing force on the adjusting bolt, on the one hand, the adjusting bolt bites tightly into the threaded hole on the fixing plate and is not prone to slipping, ensuring that the screwing degree is controlled; on the other hand, it can improve the accuracy of the operator in screwing the adjusting bolt.

[0015] Preferably, the top rod in step S200 includes a first top rod and a second top rod. A pressure sensor is provided between the first top rod and the second top rod. The size of the force is measured by the pressure sensor to determine whether the set force is reached. By providing a pressure sensor, the pressure sensor is used to detect the size of the force applied by the pressing plate to the rear bearing, and the data value detected by the pressure sensor facilitates adjusting the size of the applied force to the set force.

[0016] Preferably, annular bosses are formed at the mutually facing ends of the first top rod and the second top rod in step S200, and the pressure sensor is clamped between the annular boss on the first top rod and the annular boss on the second top rod.

[0017] Preferably, the ejector rod and the pressing plate in step S200 are rotatably connected through a spherical joint. It is very difficult to ensure absolute horizontality between the front shell and the shell inspection fixture. Therefore, there is a high probability that there is a slight inclination between the pressing plate and the end face of the rear bearing. By providing a spherical joint, the pressing plate can rotate freely relative to the ejector rod, ensuring that the pressing plate can fully fit the end face of the rear bearing.

[0018] Preferably, in step S400, a depth gauge is used to measure the distance value L3 between the inner wall of the front shell and the second joint surface.

[0019] Preferably, the shaft body includes an input shaft, an output shaft, and an intermediate shaft.

[0020] Preferably, in step S100, a base for fixing the front shell is prepared, and positioning posts are provided on the base. The front shell has an oil seal hole and a threaded hole, and the positioning posts are tightly fitted into the oil seal hole and the threaded hole to fix the front shell on the base.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the assembly of the front shell and the rear shell in the reducer shafting;

[0023] Figure 2 is a schematic diagram of using the shell inspection fixture to simulate the assembly of the rear shell and the front shell in the embodiment of the present invention;

[0024] Figure 3 is a schematic diagram of the process of selecting a gasket using the method provided in the embodiment of the present invention for determining the gasket specification during the assembly process of the reducer shafting;

[0025] Figure 4 is a schematic diagram of the reducer shafting after being assembled with a gasket of appropriate specification;

[0026] Figure 5 is a schematic diagram of the assembly of the shell inspection fixture, the top pressure inspection fixture, and the front shell after completing steps S100 and S200 in the embodiment of the present invention;

[0027] Figure 6 is Figure 5 a schematic diagram of the top pressure inspection fixture in an exploded view state.

[0028] Among them, 1. front housing, 10. front bearing chamber, 2. rear housing, 20. rear bearing chamber, 21. gasket, 3. input shaft, 4. front bearing, 5. rear bearing, 6. housing inspection fixture, 60. inspection window, 7. pressing inspection fixture, 70. pressing plate, 71. first ejector rod, 72. second ejector rod, 73. adjusting bolt, 74. fixing plate, 75. spring, 76. ball joint, 77. pressure sensor, 8. distance measuring inspection fixture, 9. base, 90. positioning post, 91. support post. Detailed implementation manners

[0029] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0030] The embodiments of the present invention will be described below with reference to the drawings.

[0031] Embodiment: This embodiment provides a method for determining the gasket specification during the assembly process of the reducer shafting. Among them, the reducer shafting includes a front housing, a rear housing, a shaft body, and front and rear bearings assembled at both ends of the shaft body. The front housing is provided with a front bearing chamber for assembling the front bearing, and the rear housing is provided with a rear bearing chamber for assembling the rear bearing. Figure 1 The schematic diagram of the assembly of the front housing and the rear housing is shown in. The method for selecting the gasket includes the following steps:

[0032] S100: Prepare a housing inspection fixture 6 for simulating the rear housing 2. Figure 2 The schematic diagram of the housing inspection fixture 6 replacing the rear housing 2 and being assembled with the front housing 1 is shown in. The housing inspection fixture 6 is provided with an inspection window 60 that communicates the rear bearing chamber 20 inside it with the outside; keep the front housing 1 fixed, and tightly fit and install one end of the shaft body assembled with the front bearing 4 into the front bearing chamber 10 of the front housing 1; combine Figure 3 and Figure 4 as shown in, align the housing inspection fixture 6 with the front housing 1 for assembly, and during the assembly process, tightly fit and install one end of the shaft body assembled with the rear bearing 5 into the rear bearing chamber 20 of the housing inspection fixture 6;

[0033] S200: Prepare a pressing inspection fixture for pressing the rear bearing 5. Combine Figure 5 and Figure 6 as shown in, the pressing inspection fixture 7 includes a pressing plate 70. The pressing plate 70 extends into the rear bearing chamber 20 through the inspection window 60 and presses the rear bearing 5 with a set acting force to simulate the force condition of the rear bearing 5 after the assembly of the reducer shafting is completed;

[0034] S300: Prepare the distance measuring fixture 8, which is used to measure the distance value L1 between the end face of the rear bearing 5 and the outer end face of the housing fixture 6;

[0035] S400: There is a first joint surface between the housing fixture 6 and the front housing 1. The designed distance value between the upper end face of the housing fixture 6 and the first joint surface is L2. The distance value L between the end face of the rear bearing 5 and the first joint surface is calculated by L1 and L2, where L = L2 - L1. There is a second joint surface between the front housing 1 and the rear housing 2. The measured distance value L3 between the inner wall of the front housing 1 and the second joint surface, and the distance values L1, L2, L3 and L are as Figure 3 and Figure 4 shown in;

[0036] S500: Calculate the clearance value a between the end face of the rear bearing 5 and the bottom of the rear bearing chamber 20, where a = L3 - L. Select a gasket with a thickness dimension greater than a and closest to a as the gasket for the reducer shafting assembly.

[0037] Simulate the rear housing 2 with the housing fixture 6. Before assembling the reducer shafting, first use the housing fixture 6 to replace the rear housing 2 for assembly to simulate the state of the front housing 1, rear housing 2 and shaft body after assembly. Set a detection window 60 on the housing fixture 6, and use a pressing plate 70 to extend into the detection window 60 to apply a set force to the rear bearing 5. This set force can simulate the pre-tightening force of the gasket 21 on the rear bearing 5 after the reducer shafting is assembled under ideal conditions. Measure the distance value L1 between the end face of the rear bearing 5 and the outer end face of the housing fixture 6 with the distance measuring fixture 8 in this state, then calculate the clearance value a between the end face of the rear bearing 5 and the bottom of the rear bearing chamber 20 according to L2 and L3, and finally select a gasket according to the clearance value a. Select a gasket using the method for selecting a gasket provided by the present invention, and use this gasket for the assembly of the reducer shafting. In the assembled reducer shafting, the clearance between the bearing and the bottom of the bearing chamber can be offset by the gasket, and at the same time, the gasket can apply a certain pre-tightening force to the bearing, and this pre-tightening force is the above-mentioned set force.

[0038] In this embodiment, in step S100, prepare a base 9 for fixing the front housing 1. Set positioning posts 90 on the base 9. The front housing 1 has an oil seal hole and a threaded hole, and the positioning posts 90 are tightly fitted into the oil seal hole and the threaded hole to fix the front housing 1 on the base 9.

[0039] Combine Figure 5 and Figure 6As shown in , the top pressure gauge 7 in step S200 of this embodiment also includes a pressure adjustment component and a push rod, and a force is applied to the pressure plate 70 through the push rod, and the magnitude of the force is adjusted to a set force through the pressure adjustment component. Among them, the pressure adjustment component includes a fixed plate 74 fixed relative to the rear bearing 5 and an adjustment bolt 73 threadedly connected to the fixed plate 74, and one end of the push rod is tightly fitted or rotationally fitted on the adjustment bolt 73, and the push rod is driven to move relative to the rear bearing 5 by screwing the adjustment bolt 73. Specifically, the fixed plate 74 is fixed to the base 9 through a support column 91.

[0040] The push rod in this embodiment includes a first push rod 71 and a second push rod 72. A pressure sensor 77 is arranged between the first push rod 71 and the second push rod 72. The pressure sensor 77 is used to measure the magnitude of the force to determine whether the set force is reached. By setting the pressure sensor 77, the pressure sensor 77 is used to detect the magnitude of the force applied by the pressure plate 70 to the rear bearing 5. The data value detected by the pressure sensor 77 facilitates the adjustment of the magnitude of the applied force to the set force. Further, in this embodiment, the ends of the first push rod 71 and the second push rod 72 facing each other are both formed with an annular boss, and the pressure sensor 77 is sandwiched between the annular boss on the first push rod 71 and the annular boss on the second push rod 72. In addition, in this embodiment, a spring 75 is also arranged between the adjusting bolt 73 and the first push rod 71. The spring 75 is sleeved on the outside of the first push rod 71, and the upper end of the spring 75 presses on the adjusting bolt 73, and the lower end of the spring 75 presses on the annular boss on the first push rod 71. On one hand, in order to accurately adjust the force of the pressure plate 70 on the rear bearing 5 to the set force, it is necessary to be able to finely screw the adjusting bolt 73. The resistance to screwing the adjusting bolt 73 is increased by the push force of the spring 75, which objectively enables the operator to screw slowly and with a small screwing amplitude, which is conducive to accurately adjusting the force of the pressure plate 70 on the rear bearing 5 to the set force. On the other hand, under the action of the push force, the adjusting bolt 73 is tightly engaged with the threaded hole on the fixing plate 74, and is not prone to slipping, ensuring that it can be kept after being screwed into place.

[0041] It is difficult to ensure that the front shell 1 and the shell gauge 6 are absolutely level, so there is a high probability that there is a slight tilt between the pressure plate 70 and the end face of the rear bearing 5. In order to avoid the existence of an inclination angle between the force exerted by the pressure plate 70 on the rear bearing 5 and the rear bearing 5, the push rod and the pressure plate 70 in this embodiment are rotatably connected via a ball joint 76. By providing the ball joint 76, the pressure plate 70 can be freely rotated relative to the push rod, thereby ensuring that the pressure plate 70 can fully fit the end face of the rear bearing 5.

[0042] Combine the following Figures 1 to 6 The method of selecting the gasket is explained in detail:

[0043] First, prepare each component of the reducer shafting system of the pads to be selected, including the front housing 1, the rear housing 2, the input shaft 3, the output shaft, and the intermediate shaft. Both ends of the three shafts, namely the input shaft 3, the output shaft, and the intermediate shaft, are respectively assembled with a front bearing 4 and a rear bearing 5 (only the case of the input shaft 3 is shown in this embodiment, and the assembly of the other output shaft and intermediate shaft with the front housing 1 and the rear housing 2 is the same). Then, position and assemble the front housing 1 to the base 9 through the positioning posts 90. Next, insert the input shaft 3, the output shaft, and the intermediate shaft into the front housing 1 correspondingly, and insert the front bearings 4 on the three shafts into the corresponding front bearing chambers 10. Then, align and assemble the housing inspection tool 6 to the front housing 1, and at the same time, insert the rear bearings 5 on the three shafts into the rear bearing chambers 20 in the housing inspection tool 6 and expose them through the inspection window 60. Turn the adjusting bolt 73 to push the rear bearing 5 through the ejector rod and the pressing plate 70, and at the same time, observe the value measured and displayed by the pressure sensor 77, and adjust according to this value until the value displayed by the pressure sensor 77 is the set acting force value. At this time, read the spacing value L1 between the end face of the rear bearing 5 and the upper end face of the housing inspection tool 6 through the rangefinder. There is a first joint surface between the front housing 1 and the housing inspection tool 6, and the designed value of the spacing between the upper end face of the housing inspection tool 6 and the first joint surface is L2. This designed value L2 is the designed value during the manufacturing of this pad selection device. After manufacturing, it is detected by a depth gauge and this value is a fixed value. Then, calculate the spacing value L between the upper end face of the rear bearing 5 and the first joint surface through L1 and L2, L = L2 - L1. In the above-mentioned reducer shafting system of the pads to be selected, there is a second joint surface between the rear housing 2 and the front housing 1. Measure the spacing value L3 between the inner wall of the rear housing 2 and the second joint surface through a depth gauge (the measurement of this spacing value L3 can directly use a depth gauge to measure the front housing 1). Calculate the clearance value a between the end face of the rear bearing 5 and the bottom of the bearing chamber in the rear housing 2 after the assembly of the reducer shafting system of the pads to be selected, a = L3 - L. Finally, select a suitable gasket according to the clearance value a, and select the gasket with a thickness dimension greater than a and closest to a as the gasket 21 for the assembly of the reducer shafting system.

[0044] The key point of this method is that, on the one hand, by pushing the rear bearing 5 through the pressing plate 70, it simulates the pre-compression force generated by the gasket on the rear bearing 5 after the assembly under the ideal state (suitable gasket specification). In this state, the total length of the shaft body and the bearings arranged at both ends of it is fixed, eliminating the errors mentioned in the prior art. On the other hand, during the process of this method, the spacing values L1 and L3 that need to be measured are convenient to measure and can be accurately measured. Therefore, through the above-mentioned pad selection device and method, the clearance value a can be accurately calculated, and then a gasket with a suitable specification can be selected through the clearance value a. It can be understood that there are manufacturing tolerances for the input shaft 3, the output shaft, and the intermediate shaft in each set of reducer shafting systems. Therefore, before the assembly of each set of reducer shafting systems, the method of selecting gaskets provided in this embodiment can be used for pad selection. After pad selection by this method, a gasket with a suitable specification can be obtained.

[0045] In the present invention, unless otherwise clearly defined or limited in the embodiments, the terms "installed", "connected", "coupled" and "fixed" etc. appearing in the embodiments shall be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or integrated. It can be understood that it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two components, or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific implementation situations.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for determining the gasket specification during the assembly process of the reducer shafting. The reducer shafting includes a front housing (1), a rear housing (2), a shaft body, and a front bearing (4) and a rear bearing (5) assembled at both ends of the shaft body. The front housing (1) is provided with a front bearing chamber (10) for assembling the front bearing (4), and the rear housing (2) is provided with a rear bearing chamber (20) for assembling the rear bearing (5). It is characterized in that, It includes the following steps: S100: Prepare a housing inspection fixture (6) for simulating the rear housing (2). The housing inspection fixture (6) is provided with a detection window (60) that communicates the rear bearing chamber (20) inside it with the outside; Keep the front housing (1) fixed, and tightly fit and install one end of the shaft body equipped with the front bearing (4) into the front bearing chamber (10) of the front housing (1); Align the housing inspection fixture (6) with the front housing (1) for assembly. During the assembly process, tightly fit and install one end of the shaft body equipped with the rear bearing (5) into the rear bearing chamber (20) of the housing inspection fixture (6); S200: Prepare a pressing inspection fixture (7) for pressing the rear bearing (5). The pressing inspection fixture (7) includes a pressing plate (70). The pressing plate (70) extends into the rear bearing chamber (20) through the detection window (60) and presses the rear bearing (5) with a set acting force to simulate the force condition of the rear bearing (5) after the assembly of the reducer shafting is completed; The pressing inspection fixture (7) further includes a pressure adjustment component and a push rod. An acting force is applied to the pressing plate (70) through the push rod, and the magnitude of the acting force is adjusted to the set acting force through the pressure adjustment component; S300: Prepare a distance measuring inspection fixture (8). The distance measuring inspection fixture (8) is used to measure the distance value L1 between the end face of the rear bearing (5) and the outer end face of the housing inspection fixture (6); There is a first joint surface between the housing inspection fixture (6) and the front housing (1). The designed distance value between the upper end face of the housing inspection fixture (6) and the first joint surface is L2. The distance value L between the end face of the rear bearing (5) and the first joint surface is calculated by L1 and L2, L = L2 - L1; There is a second joint surface between the front housing (1) and the rear housing (2). Measure the distance value L3 between the inner wall of the front housing (1) and the second joint surface; S500: Calculate the clearance value a between the end face of the rear bearing (5) and the bottom of the rear bearing chamber (20), a = L3 - L. Determine the gasket with a thickness dimension greater than a and closest to a as the gasket for the assembly of the reducer shafting.

2. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, wherein The pressure adjustment component in step S200 includes a fixing plate (74) fixed relative to the rear bearing (5) and an adjustment bolt (73) threadedly connected to the fixing plate (74). One end of the push rod is tightly fitted or rotatably fitted on the adjustment bolt (73), and the adjustment bolt (73) is screwed to drive the push rod to move relative to the rear bearing (5).

3. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, characterized in that, In step S200, a spring (75) is arranged between the adjustment bolt (73) and the push rod. A pushing acting force is applied to the adjustment bolt (73) through the spring (75) to increase the force required to screw the adjustment bolt (73).

4. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, characterized in that, The push rod in step S200 includes a first push rod (71) and a second push rod (72). A pressure sensor (77) is arranged between the first push rod (71) and the second push rod (72). The magnitude of the acting force is measured through the pressure sensor (77) to determine whether the set acting force is reached.

5. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 4, characterized in that, The ends of the first ejector rod (71) and the second ejector rod (72) in step S200 facing each other are both formed with annular bosses, and the pressure sensor (77) is clamped between the annular boss on the first ejector rod (71) and the annular boss on the second ejector rod (72).

6. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, wherein The ejector rod in step S200 is rotatably connected to the pressure plate (70) through a spherical joint (76).

7. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, characterized in that, In step S400, the distance value L3 between the inner wall of the front shell (1) and the second joint surface is measured by a depth gauge.

8. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 1, characterized in that, The shaft body includes an input shaft, an output shaft and an intermediate shaft.

9. The method for determining the gasket specification during the assembly process of the reducer shafting according to claim 8, characterized in that, In step S100, a base (9) for fixing the front shell (1) is prepared, and a positioning post (90) is provided on the base (9). The front shell (1) has an oil seal hole and a threaded hole, and the positioning post (90) is tightly fitted into the oil seal hole and the threaded hole to fix the front shell (1) on the base (9).

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