CN116007475A - Method for determining gasket specifications during assembly of a reducer shafting - Google Patents

Abstract

The invention discloses a method for determining gasket specifications in the assembly process of a speed reducer shafting, which comprises a front shell, a rear shell, a shaft body, a front bearing and a rear bearing, wherein the front shell is provided with a front bearing chamber, and the rear shell is provided with a rear bearing chamber, and the method comprises the following steps: s100: preparing a shell checking fixture for simulating a rear shell and assembling the shell checking fixture, the front shell and the shaft body; s200: the jacking detection tool is used for jacking the rear bearing by setting acting force; s300: measuring a distance value L1 between the end face of the rear bearing and the outer end face of the shell gauge by using the distance measuring gauge; s400: the design value of the interval between the upper end surface of the shell detection tool and the first combining surface is L2, the interval value between the end surface of the rear bearing and the first combining surface is L=L2-L1, and the interval value between the inner wall of the front shell and the second combining surface is L3; s500: the gap value a=l3-L between the end face of the rear bearing and the bottom of the rear bearing chamber, the gasket being selected according to a. The invention can be applied to select a proper gasket.

Description

Method for determining gasket specifications during assembly of a reducer shafting

Technical Field

The invention relates to the field of electric drive assemblies, in particular to a method for determining gasket specifications in a speed reducer shafting assembly process.

Background

The reducer shafting of the electric drive assembly in the new energy automobile generally comprises a front shell and a rear shell, an input shaft, a middle shaft and an output shaft are arranged between the front shell and the rear shell, bearings are arranged at two ends of the three shafts, and correspondingly, bearing chambers for installing the bearings are formed in the front shell and the rear shell. Since the three shafts are manufactured with a certain tolerance, a certain gap is formed between the bearing mounted on the end of the shaft and the bottom of the bearing chamber after the assembly is completed. The presence of the gap may cause the bearing to shift relative to the bearing chamber, so that in practice, a gasket of suitable size will be chosen to fit into the bottom of the bearing chamber during assembly of the reducer shaft, to counter the gap and to create a certain preload to the bearing. In order to ensure that the size of the gasket is matched with the gap, an accurate gap value needs to be obtained, and then the gasket with proper size is selected.

It is easy to think that the distance value between the bearing chamber bottom of the front shell and the bearing chamber bottom of the rear shell can be obtained first, and then the corresponding total length value of the shaft and the shaft sleeve assembled together can be obtained, and the difference between the distance value and the total length value is the distance value between the bearing end face and the bearing chamber bottom. However, in practical operation, the distance between the bottom of the bearing chamber of the front housing and the bottom of the bearing chamber of the rear housing is difficult to measure (the front housing and the rear housing are assembled and then cannot be measured, and the distance measuring instrument cannot be inserted into the interior for measurement after assembly), so that the design dimensions between the bottom of the bearing chamber of the front housing and the bottom of the bearing chamber of the rear housing are used in the prior art, and there are tolerances in the manufacturing process, and the design dimensions are different from the actual dimensions and are not accurate values which are consistent with the actual dimensions. In addition, after the assembly is completed, the aim is to eliminate the gap by the gasket and form a certain pressing force for the bearing, and in the two cases that the bearing is pressed and the bearing is not pressed, the total length value of the bearing and the shaft is different, and in the prior art, the total length of the bearing and the shaft measured in the case that the bearing is not pressed is necessarily larger, and the value is not an accurate value which is in accordance with practice. In summary, the gap value obtained by calculation of two values which do not match the actual value has a large error, and the gasket selected based on the error has a high probability of failing to achieve the purpose. In practice, the spacer selected by the gap value tends to be smaller, so that a gap still exists between the end face of the bearing and the bottom face of the bearing chamber, and accordingly, the bearing cannot obtain the required pressing force.

Disclosure of Invention

The invention provides a method for determining the specification of a gasket in the assembly process of a speed reducer shafting, which is used for solving the problem that a gasket with a proper size cannot be selected for the speed reducer shafting in the prior art.

The invention adopts the following technical scheme: method for determining gasket specifications in a reducer shafting assembly process, the reducer shafting comprising a front casing, a rear casing, a shaft body, and front and rear bearings assembled at both ends of the shaft body, the front casing being provided with a front bearing chamber for assembling the front bearing, the rear casing being provided with a rear bearing chamber for assembling the rear bearing, comprising the steps of:

s100: preparing a shell check tool for simulating a rear shell, wherein the shell check tool is provided with a detection window for communicating a rear bearing chamber in the shell with the outside; the front shell is kept fixed, and one end of the shaft body, which is provided with the front bearing, is tightly matched and installed in a front bearing chamber of the front shell; the shell checking fixture is aligned with the front shell to be assembled, and one end of the shaft body, which is provided with the rear bearing, is tightly matched and installed in the rear bearing chamber of the shell checking fixture in the assembling process;

s200: preparing a jacking detection tool for jacking the rear bearing, wherein the jacking detection tool comprises a pressing plate, and the pressing plate stretches into a rear bearing chamber through a detection window and jacks the rear bearing with set acting force so as to simulate the stress condition of the rear bearing after the assembly of a reducer shafting is completed;

s300: preparing a ranging gauge for measuring a distance value L1 between the end face of the rear bearing and the outer end face of the shell gauge;

s400: a first joint surface is arranged between the shell checking fixture and the front shell, the designed distance value between the upper end surface of the shell checking fixture and the first joint surface is L2, and the distance value L between the end surface of the rear bearing and the first joint surface is calculated by L1 and L2, wherein L=L2-L1; a second joint surface is arranged between the front shell and the rear shell, and a distance value L3 between the inner wall of the front shell and the second joint surface is measured;

s500: and calculating a clearance value a between the end face of the rear bearing and the bottom of the rear bearing chamber, wherein a=L3-L, and determining a gasket with the thickness dimension larger than a and closest to a as a gasket for assembling the shaft system of the speed reducer.

The invention has the following beneficial effects: the shell checking fixture is used for simulating the rear shell, and the shell checking fixture is used for replacing the rear shell for assembly before the assembly of the reducer shafting is carried out, so that the state of the front shell, the rear shell and the shaft body after the assembly is completed is simulated. The detection window is arranged on the shell detection tool, the pressing plate stretches into the detection window to apply a set acting force to the rear bearing, and the set acting force can simulate the pretightening force of the gasket to the rear bearing after the assembly of the reducer shafting under ideal conditions. And in the state, using the distance measuring gauge to measure a distance value L1 between the end face of the rear bearing and the outer end face of the shell gauge, calculating to obtain a gap value a between the end face of the rear bearing and the bottom of the rear bearing chamber according to L2 and L3, and finally selecting a gasket according to the gap value a. The gasket is selected by the method for selecting the gasket, the gasket is used for assembling the reducer shafting, the gap between the bearing and the bottom of the bearing chamber can be counteracted by the gasket in the assembled reducer shafting, and meanwhile, the gasket can apply a certain pretightening force to the bearing, and the pretightening force is the set acting force.

Preferably, the pressing gauge in step S200 further includes a pressure adjusting assembly and a push rod, wherein the push rod applies a force to the pressing plate, and the pressure adjusting assembly adjusts the force to a set force.

Preferably, the pressure adjusting assembly in step S200 includes a fixing plate fixed relative to the rear bearing and an adjusting bolt screwed on the fixing plate, one end of the ejector rod is tightly or rotationally matched with the adjusting bolt, and the ejector rod is driven to move relative to the rear bearing by screwing the adjusting bolt.

Preferably, in step S200, a spring is disposed between the adjusting bolt and the ejector rod, and a pushing force is applied to the adjusting bolt by the spring, so as to increase a force required for screwing the adjusting bolt. The adjusting bolt generates a pushing acting force through the spring, and under the action of the pushing acting force, on one hand, the adjusting bolt is tightly snapped with the threaded hole on the fixed plate, so that slipping is not easy to occur, and the screwing degree is controlled; on the other hand can promote the accuracy that the operator screwed adjusting bolt.

Preferably, the ejector pins in step S200 include a first ejector pin and a second ejector pin, a pressure sensor is disposed between the first ejector pin and the second ejector pin, and the magnitude of the acting force is measured by the pressure sensor to determine whether the set acting force is reached. Through setting up pressure sensor, utilize pressure sensor to detect the effort size that the clamp plate applyed to the back bearing, the data value that detects through pressure sensor is convenient for adjust the effort size of applying into the settlement effort.

Preferably, in step S200, annular bosses are formed at the end portions of the first ejector rod and the second ejector rod facing each other, and the pressure sensor is sandwiched between the annular boss on the first ejector rod and the annular boss on the second ejector rod.

Preferably, the ejector pin and the pressing plate in the step S200 are rotatably connected through a ball joint. The front shell and the shell are difficult to ensure absolute level, so that the pressing plate has fine inclination with the end face of the rear bearing, and the pressing plate can freely rotate relative to the ejector rod by arranging the ball joint, so that the pressing plate can be fully attached to the end face of the rear bearing.

Preferably, the distance value L3 between the inner wall of the front case and the second bonding surface is measured by the depth gauge in step S400.

Preferably, the shaft body comprises an input shaft, an output shaft and an intermediate shaft.

Preferably, a base for fixing the front case is prepared in step S100, and a positioning column is provided on the base, the front case having an oil-sealed hole and a threaded hole, the positioning column being tightly fitted into the oil-sealed hole and the threaded hole to fix the front case on the base.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic illustration of the assembly of a front housing with a rear housing in a reducer shafting;

FIG. 2 is a schematic diagram of a case check tool used to simulate the assembly of a rear case and a front case according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a process for selecting shims using a method for determining shim specifications during assembly of a reducer shafting provided by an embodiment of the present invention;

FIG. 4 is a schematic illustration of the reduction shaft after assembly, assuming proper sizing of shims;

FIG. 5 is a schematic diagram illustrating assembly of the shell gauge, the top press gauge and the front shell after steps S100 and S200 are completed in an embodiment of the present invention;

fig. 6 is a schematic diagram of the top pressure gauge in fig. 5 in an exploded view.

The device comprises a front shell, a front bearing chamber, a rear shell, a rear bearing chamber, a gasket, an input shaft, a front bearing, a rear bearing, a housing checking fixture, a detection window, a top pressure checking fixture, a pressing plate, a first ejector rod, a second ejector rod, a regulating bolt, a fixing plate, a spring, a ball joint, a pressure sensor, a distance measuring checking fixture, a base, a positioning column and a supporting column.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

Embodiments of the present invention are described below with reference to the accompanying drawings.

Examples: the embodiment provides a method for determining a gasket specification in a speed reducer shafting assembly process, wherein the speed reducer shafting comprises a front shell, a rear shell, a shaft body, a front bearing and a rear bearing, wherein the front bearing and the rear bearing are assembled at two ends of the shaft body, the front shell is provided with a front bearing chamber for assembling the front bearing, the rear shell is provided with a rear bearing chamber for assembling the rear bearing, and a schematic diagram of assembling the front shell and the rear shell is shown in fig. 1. The method for selecting the gasket comprises the following steps:

s100: preparing a housing gauge 6 for simulating the rear case 2, a schematic view of the housing gauge 6 being assembled with the front case 1 in place of the rear case 2 is shown in fig. 2, the housing gauge 6 being provided with a detection window 60 communicating the rear bearing chamber 20 inside thereof with the outside; the front shell 1 is kept fixed, and one end of the shaft body, provided with the front bearing 4, is tightly matched and installed in a front bearing chamber 10 of the front shell 1; as shown in fig. 3 and 4, the housing gauge 6 is assembled in alignment with the front housing 1 such that the end of the shaft body on which the rear bearing 5 is assembled is fitted into the rear bearing chamber 20 of the housing gauge 6 with a tight fit;

s200: preparing a jacking detection tool for jacking the rear bearing 5, and combining with the description of fig. 5 and 6, wherein the jacking detection tool 7 comprises a pressing plate 70, and the pressing plate 70 extends into the rear bearing chamber 20 through a detection window 60 and jacks the rear bearing 5 with a set acting force so as to simulate the stress condition of the rear bearing 5 after the assembly of a reducer shafting is completed;

s300: preparing a ranging gauge 8, wherein the ranging gauge 8 is used for measuring a distance value L1 between the end face of the rear bearing 5 and the outer end face of the shell gauge 6;

s400: a first joint surface is arranged between the shell detection tool 6 and the front shell 1, the design value of the interval between the upper end surface of the shell detection tool 6 and the first joint surface is L2, and the interval value L between the end surface of the rear bearing 5 and the first joint surface is obtained through calculation of L1 and L2, wherein L=L2-L1; a second joint surface is arranged between the front shell 1 and the rear shell 2, and a distance value L3 between the inner wall of the front shell 1 and the second joint surface is measured, wherein the distance values L1, L2, L3 and L are shown in fig. 3 and 4;

s500: the gap value a between the end face of the rear bearing 5 and the bottom of the rear bearing chamber 20, a=l3-L, is calculated, and a spacer having a thickness dimension greater than a and closest to a is selected as a spacer for assembling the reduction gear shaft.

The rear shell 2 is simulated through the shell checking fixture 6, and before the assembly of the reducer shafting is carried out, the shell checking fixture 6 is used for replacing the rear shell 2 to carry out the assembly, and the states of the front shell 1, the rear shell 2 and the shaft body after the assembly is completed are simulated. The detection window 60 is arranged on the shell detection tool 6, and the pressing plate 70 stretches into the detection window 60 to apply a set acting force to the rear bearing 5, wherein the set acting force can simulate the pretightening force of the gasket 21 to the rear bearing 5 after the assembly of the reducer shafting under ideal conditions. The distance measuring gauge 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 gauge 6 in this state, then the gap value a between the end face of the rear bearing 5 and the bottom of the rear bearing chamber 20 is calculated from L2 and L3, and finally the spacer is selected according to the gap value a. The gasket is selected by the method for selecting the gasket, the gasket is used for assembling the reducer shafting, the gap between the bearing and the bottom of the bearing chamber can be counteracted by the gasket in the assembled reducer shafting, and meanwhile, the gasket can apply a certain pretightening force to the bearing, and the pretightening force is the set acting force.

In this embodiment, a base 9 for fixing the front case 1 is prepared in step S100, a positioning column 90 is provided on the base 9, the front case 1 has an oil seal hole and a screw hole, and the positioning column 90 is tightly fitted into the oil seal hole and the screw hole to fix the front case 1 on the base 9.

As shown in fig. 5 and 6, the pressing gauge 7 in step S200 in the present embodiment further includes a pressure adjusting assembly and a jack, the force is applied to the pressing plate 70 by the jack, and the magnitude of the force is adjusted to a set force by the pressure adjusting assembly. The pressure adjusting assembly comprises a fixed plate 74 fixed relative to the rear bearing 5 and an adjusting bolt 73 in threaded connection with the fixed plate 74, one end of the ejector rod is arranged on the adjusting bolt 73 in a tight fit or a running fit manner, and the adjusting bolt 73 is screwed to drive the ejector rod to move relative to the rear bearing 5. Specifically, the fixing plate 74 is fixed to the base 9 by the support columns 91.

The ejector pin in this embodiment includes a first ejector pin 71 and a second ejector pin 72, a pressure sensor 77 is provided between the first ejector pin 71 and the second ejector pin 72, and the magnitude of the applied force is measured by the pressure sensor 77 to determine whether the set applied force is reached. By providing the pressure sensor 77, the amount of force applied to the rear bearing 5 by the platen 70 is detected by the pressure sensor 77, and the data value detected by the pressure sensor 77 facilitates adjustment of the amount of force applied to the set force. Further, in this embodiment, annular bosses are formed at the end portions of the first ejector rod 71 and the second ejector rod 72 facing each other, and the pressure sensor 77 is sandwiched between the annular bosses on the first ejector rod 71 and the annular bosses on the second ejector rod 72. In addition, in this embodiment, a spring 75 is further disposed between the adjusting bolt 73 and the first ejector rod 71, the spring 75 is sleeved outside the first ejector rod 71, the upper end of the spring 75 is pressed against the adjusting bolt 73, and the lower end of the spring 75 is pressed against an annular boss on the first ejector rod 71. On the one hand, in order to accurately adjust the acting force of the pressing plate 70 on the rear bearing 5 to be the set acting force, the adjusting bolt 73 needs to be finely screwed, the resistance of screwing the adjusting bolt 73 is increased by the pushing acting force of the spring 75, and the screwing operation of an operator can be objectively slow, the screwing amplitude is smaller, so that the acting force of the pressing plate 70 on the rear bearing 5 is accurately adjusted to be the set acting force. On the other hand, under the action of the pushing force, the adjusting bolt 73 is tightly snapped with the threaded hole on the fixing plate 74, so that slipping is not easy to occur, and the screw can be kept in place after screwing.

The front shell 1 and the shell gauge 6 are difficult to ensure absolute level, so that fine inclination exists between the very high probability of the pressing plate 70 and the end face of the rear bearing 5, and in order to avoid inclination exists between the acting force of the pressing plate 70 to the rear bearing 5 and the rear bearing 5, the ejector rod and the pressing plate 70 in the embodiment are rotationally connected through the ball joint 76, and by arranging the ball joint 76, the pressing plate 70 can rotate freely relative to the ejector rod, so that the pressing plate 70 can be fully attached to the end face of the rear bearing 5.

The method of selecting the gasket is described in detail below with reference to fig. 1 to 6:

first, the components of the reduction gear shaft system to be selected are prepared, including the front case 1, the rear case 2, the input shaft 3, the output shaft, and the intermediate shaft, wherein both ends of the three shafts of the input shaft 3, the output shaft, and the intermediate shaft are respectively equipped with the front bearing 4 and the rear bearing 5 (only the case of the input shaft 3 is shown in the present embodiment, and the other output shaft and intermediate shaft are assembled identically to the front case 1, the rear case 2). The front housing 1 is then assembled and positioned to the base 9 by the positioning posts 90, and then the input shaft 3, the output shaft and the intermediate shaft are correspondingly installed into the front housing 1, wherein the front bearings 4 on the three shafts are installed into the corresponding front bearing chambers 10. The housing gauge 6 is then aligned and assembled to the front housing 1, with the rear bearings 5 on the three shafts all fitted into the rear bearing chambers 20 in the housing gauge 6 and exposed through the detection windows 60. The screw adjusting bolt 73 is screwed to push the rear bearing 5 through the push rod and the pressing plate 70, and simultaneously, the measurement and display value of the pressure sensor 77 is observed, and the adjustment is performed according to the value until the value of the pressure sensor 77 is displayed as the value of the set acting force. At this time, the distance L1 between the end face of the rear bearing 5 and the upper end face of the housing gauge 6 is read by a distance meter. The first joint surface is arranged between the front shell 1 and the shell gauge 6, the designed value of the interval between the upper end surface of the shell gauge 6 and the first joint surface is L2, the designed value L2 is the designed value when the cushion selecting device is manufactured, and after the cushion selecting device is manufactured, the cushion selecting device is detected by a depth gauge, and the designed value is a fixed value. And then calculating the distance value L between the upper end surface of the rear bearing 5 and the first joint surface through L1 and L2, wherein L=L2-L1. In the above-mentioned reducer shafting with the pad to be selected, a second joint surface is provided between the rear casing 2 and the front casing 1, and a distance value L3 between the inner wall of the rear casing 2 and the second joint surface is obtained by measuring with a depth gauge (the distance value L3 may be measured directly with the front casing 1 by using the depth gauge). The gap 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 shaft system of the pad to be selected is calculated, a=l3-L. Finally, a proper spacer is selected according to the clearance value a, and a spacer having a thickness greater than a and closest to a is selected as the reducer shaft assembly spacer 21.

The method is focused on that, on one hand, the pushing of the pressing plate 70 to the rear bearing 5 is used for simulating the pre-compression force of the gasket to the rear bearing 5 after the assembly is completed in an ideal state (the gasket specification is proper), and in the state, the total length of the shaft body and the bearings arranged at the two ends of the shaft body is fixed, so that the errors in the prior art are eliminated. On the other hand, in the process of carrying out the method, the spacing values L1 and L3 required to be measured are measured conveniently and can be accurately measured. Therefore, the gap value a can be accurately calculated by the pad selecting device and the pad selecting method, and the pad with proper specification is selected by the gap value a. It will be appreciated that manufacturing tolerances exist for the input shaft 3, the output shaft and the intermediate shaft in each set of reducer shafting, so that each set of reducer shafting can be subjected to pad selection according to the method for selecting the pad provided by the embodiment before assembly, and the pad with proper specification is obtained after the pad is selected by the method.

In the present invention, unless explicitly stated or limited otherwise in the examples, the terms "mounted," "connected," and "fixed" as used in the examples should be interpreted broadly, e.g., the connection may be a fixed connection, may be a removable connection, or may be integral, and it may be understood that the connection may also be a mechanical connection, an electrical connection, etc.; of course, it may be directly connected, or indirectly connected through an intermediate medium, or may be in communication with each other, or in interaction with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific embodiments.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. Method for determining the gasket specification during assembly of a reducer shafting, the reducer shafting comprising a front casing (1), a rear casing (2), a shaft body and a front bearing (4) and a rear bearing (5) assembled at both ends of the shaft body, the front casing (1) being provided with a front bearing chamber (10) for assembling the front bearing (4), the rear casing (2) being provided with a rear bearing chamber (20) for assembling the rear bearing (5), characterized in that it comprises the following steps:

s100: preparing a housing inspection tool (6) for simulating the rear housing (2), wherein the housing inspection tool (6) is provided with a detection window (60) for communicating the rear bearing chamber (20) inside with the outside;

the front shell (1) is kept fixed, and one end of the shaft body, which is provided with the front bearing (4), is tightly matched and installed in a front bearing chamber (10) of the front shell (1);

the shell checking fixture (6) is aligned with the front shell (1) for assembly, and one end of the shaft body, provided with the rear bearing (5), is tightly matched and installed in a rear bearing chamber (20) of the shell checking fixture (6) in the assembly process;

s200: preparing a jacking detection tool (7) for jacking the rear bearing (5), wherein the jacking detection tool (7) comprises a pressing plate (70), and the pressing plate (70) stretches into the rear bearing chamber (20) through a detection window (60) and jacks the rear bearing (5) with set acting force so as to simulate the stress condition of the rear bearing (5) after the assembly of a reducer shafting is completed;

s300: preparing a ranging gauge (8), wherein the ranging gauge (8) is used for measuring a distance value L1 between the end face of the rear bearing (5) and the outer end face of the shell gauge (6);

s400: a first joint surface is arranged between the shell detection tool (6) and the front shell (1), the design value of the distance between the upper end surface of the shell detection tool (6) and the first joint surface is L2, and the distance value L between the end surface of the rear bearing (5) and the first joint surface is calculated by L1 and L2, wherein L=L2-L1;

a second joint surface is arranged between the front shell (1) and the rear shell (2), and a distance value L3 between the inner wall of the front shell (1) and the second joint surface is obtained through measurement;

s500: and calculating a clearance value a between the end face of the rear bearing (5) and the bottom of the rear bearing chamber (20), wherein a=L3-L, and determining a gasket with the thickness dimension larger than a and closest to a as a gasket for assembling the shaft system of the speed reducer.

2. The method for determining shim specifications during assembly of a reducer shafting of claim 1, wherein the jacking gauge (7) of step S200 further comprises a pressure adjustment assembly and a ram, a force being applied to the platen (70) by the ram, the magnitude of the force being adjusted to a set force by the pressure adjustment assembly.

3. Method for determining shim specifications during assembly of a gear shafting according to claim 2, characterized in that the pressure adjusting assembly in step S200 comprises a fixed plate (74) fixed relative to the rear bearing (5) and an adjusting bolt (73) screwed onto the fixed plate (74), one end of the ejector rod being arranged on the adjusting bolt (73) in a tight fit or in a running fit, the ejector rod being moved relative to the rear bearing (5) by screwing the adjusting bolt (73).

4. The method for determining a shim gauge during assembly of a reducer shafting according to claim 2, characterized in that in step S200 a spring (75) is provided between the adjusting bolt (73) and the ejector rod, by which spring (75) a pushing force is applied to the adjusting bolt (73) to increase the force required to screw the adjusting bolt (73).

5. The method for determining a shim gauge during assembly of a decelerator shafting as claimed in claim 2, wherein the ejector pins in step S200 include a first ejector pin (71) and a second ejector pin (72), a pressure sensor (77) is provided between the first ejector pin (71) and the second ejector pin (72), and the magnitude of the applied force is measured by the pressure sensor (77) to determine whether the set applied force is reached.

6. The method for determining a shim gauge during assembly of a shafting of a speed reducer according to claim 5, characterized in that the mutually facing ends of the first and second ejector pins (71, 72) in step S200 are each formed with an annular boss, the pressure sensor (77) being sandwiched between the annular boss on the first ejector pin (71) and the annular boss on the second ejector pin (72).

7. The method for determining shim specifications during assembly of a decelerator shafting as claimed in claim 2 wherein the ram in step S200 is rotationally coupled to a platen (70) by a ball joint (76).

8. Method for determining a shim gauge during assembly of a reducer shafting according to claim 1, characterized in that the distance value L3 between the inner wall of the front shell (1) and the second joint surface is measured by a depth gauge in step S400.

9. The method for determining shim specifications during a decelerator shafting assembly process of claim 1, wherein the shaft body includes an input shaft, an output shaft, and an intermediate shaft.

10. Method for determining shim specifications during assembly of a gear shafting according to claim 9, characterized in that in step S100 a base (9) for fixing the front shell (1) is prepared, a positioning post (90) is provided on the base (9), the front shell (1) has an oil-tight hole and a threaded hole, the positioning post (90) being tightly fitted into the oil-tight hole and the threaded hole to fix the front shell (1) on the base (9).

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