A clearance measurement method and manufacturing method for a reducer rotor shaft tapered bearing

Abstract

The present invention belongs to the technical field of aviation speed reducer rotor shaft equipment, and specifically relates to a method for measuring the clearance of a speed reducer rotor shaft tapered bearing and a method for manufacturing the same. One method for measuring the clearance of a speed reducer rotor shaft tapered bearing includes a stop mechanism and an axial loading mechanism; the axial loading mechanism is used to apply an axial force to the rotor shaft of the speed reducer rotor shaft assembly from bottom to top, and the stop mechanism is arranged above the axial loading mechanism, and is used to guide the rotor shaft of the speed reducer rotor shaft assembly; the measuring method includes the following steps: the speed reducer rotor shaft assembly is arranged on the axial loading mechanism, and a micrometer is arranged on the speed reducer rotor shaft assembly; the axial loading mechanism applies an axial force F to the speed reducer rotor shaft; and the clearance value measured by the micrometer is obtained. The present invention applies an axial load to the rotor shaft by pushing from bottom to top, which effectively avoids unbalanced load and improves the accuracy of the tapered bearing clearance measurement.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation speed reducer rotor shaft equipment, and in particular relates to a clearance measuring method and a manufacturing method of a speed reducer rotor shaft tapered bearing. Background Art

[0002] During the research, development, and manufacturing of the rotor shaft of an aircraft reducer, it is necessary to ensure that the clearance of the tapered bearing of the rotor shaft is the design value, so the clearance needs to be measured; the clearance should be understood as the amount of movement of the tapered bearing along the axial direction of the rotor shaft.

[0003] Chinese patent CN213515431U discloses a device for measuring the axial clearance of bearings. This patent primarily measures the clearance of tapered bearings by fixing the bearing seat (casing) and applying an axial force to the shaft via a lifting device to measure the clearance. However, for bearings on heavy shafts, applying too much force can result in eccentric loading, affecting the accuracy of clearance measurement. For adjusting the clearance of light shafts, measuring the axial clearance of the bearings requires less equipment and is simple to operate. However, for aircraft reducer rotor shafts, due to their heavy mass, a hoist must be used to apply a load to the bearings. However, the inability of the hoist's hook to be fixed can result in eccentric loading, making it impossible for existing technologies to accurately measure the axial clearance of the tapered bearings of the rotor shafts.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] In order to solve the technical problems existing in the prior art, the present invention provides a clearance measurement method and a manufacturing method for the tapered bearing of the reducer rotor shaft. The present invention applies an axial load to the rotor shaft by pushing from bottom to top, effectively avoiding unbalanced load and improving the accuracy of clearance measurement.

[0006] The present invention includes the following technical solutions:

[0007] A first aspect of the present invention provides a method for measuring the clearance of a tapered bearing of a reducer rotor shaft, comprising a stop mechanism and an axial loading mechanism; the axial loading mechanism is used to apply an axial force from bottom to top to the rotor shaft of the reducer rotor shaft assembly; the stop mechanism is disposed above the axial loading mechanism and is used to guide the rotor shaft of the reducer rotor shaft assembly;

[0008] The measuring method comprises the following steps:

[0009] The speed reducer rotor shaft assembly is arranged on the axial loading mechanism, and a dial indicator is arranged on the speed reducer rotor shaft assembly;

[0010] The axial loading mechanism applies an axial force F to the reducer rotor shaft;

[0011] Obtain the clearance value measured by the dial indicator.

[0012] Furthermore, the stopping mechanism includes a first connecting portion, a second connecting portion and a guide portion, two ends of the guide portion are respectively connected to the first connecting portion and the second connecting portion, and a guide hole is provided on the guide portion.

[0013] Furthermore, the axial loading mechanism includes a bracket, a thrust tooling, a force measuring device and a pushing structure. The bracket is provided with a connecting structure for connecting to the reducer rotor shaft assembly. The bracket is connected to the pushing structure. The force measuring device is provided at the pushing position of the pushing structure. The force measuring device is connected to the thrust tooling.

[0014] Furthermore, the axial force F is obtained by the following formula: F=G+A;

[0015] Wherein: G=mg, m is the weight of the reducer rotor shaft assembly (30) - the weight of the upper casing (32) - the weight of the lower casing (33), g is the acceleration of gravity, and the value range of A is: 600~700.

[0016] Furthermore, a plurality of micrometers are provided, and the clearance value is obtained by taking an average value of the measurement values ​​of the plurality of micrometers.

[0017] Furthermore, the measuring method comprises the following steps:

[0018] S100: placing the reducer rotor shaft assembly on the axial loading mechanism, and placing a plurality of dial indicators on the reducer rotor shaft assembly;

[0019] S200: The axial loading mechanism applies an axial force F to the reducer rotor shaft;

[0020] S300: Obtaining a plurality of micrometer measurement values ​​and calculating an average value of the plurality of measurement values, wherein the average value is the clearance value.

[0021] Further, step S200 is repeated to obtain multiple groups of measurement values ​​of multiple dial indicators, and multiple groups of average values ​​are obtained, and the maximum value among the multiple groups of average values ​​is the clearance value.

[0022] A second aspect of the present invention provides a method for manufacturing a reducer rotor shaft assembly, the reducer rotor shaft assembly comprising a rotor shaft, an upper casing, a lower casing, a small tapered bearing, a large tapered bearing, and a bearing spacer sleeve, the rotor shaft being connected to the upper casing via a roller bearing, the upper casing being connected to the lower casing, the lower casing being connected to the rotor shaft via a large tapered bearing and a small tapered bearing, the bearing spacer sleeve being disposed between the large tapered bearing and the small tapered bearing, the manufacturing method comprising the following steps:

[0023] Obtain the target clearance M of the tapered bearing of the reducer rotor shaft assembly;

[0024] Obtaining an initial length H of the bearing spacer sleeve by the target clearance, and assembling a reducer rotor shaft assembly according to the target clearance and the initial length of the bearing spacer sleeve;

[0025] The actual clearance is obtained by the clearance measurement method described above;

[0026] By the target clearance M and actual clearance μ N To adjust the length H0 of the bearing spacer sleeve of the reducer rotor shaft assembly until the target clearance M and the actual clearance μ are obtained by the clearance measurement method. N If they are equal, a reducer rotor shaft assembly that meets the requirements is obtained.

[0027] Furthermore, the initial length H of the bearing spacer sleeve is obtained by the following formula:

[0028] H=M+(T1+T2+L)+δ-(B1+B2);

[0029] Among them: T1 is the total width of the large tapered bearing, T2 is the total width of the small tapered bearing, B1 is the width of the inner ring of the large tapered bearing, B2 is the width of the inner ring of the small tapered bearing, δ is the correction parameter, and L is the distance between the bearing spacer sleeve shoulders.

[0030] Furthermore, adjusting the length of the bearing spacer sleeve of the reducer rotor shaft assembly according to the target clearance and the actual clearance includes the following steps:

[0031] Through the actual clearance μ N Obtain the length H0 of the bearing spacer sleeve;

[0032] If: H0<H, increase the length of the bearing spacer sleeve;

[0033] H0>H, reduce the length of the bearing spacer sleeve;

[0034] Where: μ N ∈(μ1,μ2,μ3,...,μ n ), n represents the number of times the micrometer is measured.

[0035] By adopting the above technical solution, the present invention has the following advantages:

[0036] 1. The present invention applies an axial load to the rotor shaft by pushing upward from the bottom, thereby effectively avoiding eccentric loading and improving the accuracy of clearance measurement.

[0037] 2. The stop mechanism and axial loading mechanism provided in the present invention can apply an axial load to the rotor shaft of the speed reducer rotor shaft assembly from bottom to top.

[0038] 3. The manufacturing method of the present invention obtains the initial length H of the bearing clearance sleeve by calculation, so that the error between the initially obtained measured clearance and the target clearance of the reducer rotor shaft assembly is smaller. When adjusting the length of the bearing clearance sleeve, the number and amplitude of adjustments are reduced, which specifically improves manufacturing efficiency and reduces costs.

[0039] 4. The present invention provides a plurality of dial indicators for measurement and obtains the clearance according to the average of the measured values ​​of the dial indicators, which has the advantage of improving the accuracy of the clearance measurement value.

[0040] 5. The axial force F of the applied axial load of the present invention is calculated by the weight of the reducer rotor shaft assembly, the weight of the upper casing and the weight of the lower casing, which has the advantage of improving the accuracy of clearance measurement.

[0041] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 Schematic diagram of the clearance measurement structure of the reducer rotor shaft tapered bearing in an embodiment of the present invention;

[0044] Figure 2 A schematic structural diagram of a stop mechanism in an embodiment of the present invention;

[0045] Figure 3 Schematic diagram of the structure of the axial loading mechanism in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram of the connection structure of the push structure in an embodiment of the present invention; Figure 5 Schematic diagram of the structure of the reducer rotor shaft assembly in an embodiment of the present invention;

[0047] Figure 6 for Figure 5 Schematic diagram of the local structure;

[0048] In the figure: 10-stop mechanism, 11-first connecting portion, 111-first mounting seat, 12-second connecting portion, 121-second mounting seat, 13-guide portion, 20-axial loading mechanism, 21-bracket, 211-threaded rod, 22-thrust tooling, 221-thrust structure, 222-thrust ball bearing, 23-force measuring device, 24-thrust structure, 241-screw, 242-screw head, 243-handwheel, 244-guide block, 25-guide light rod, 30-reducer rotor shaft assembly, 31-rotor shaft, 32-upper casing, 33-lower casing, 34-small tapered bearing, 35-large tapered bearing, 36-bearing spacer sleeve, 37-positioning sleeve, 38-locking nut, 39-connecting platform. DETAILED DESCRIPTION

[0049] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0051] This embodiment provides a method for measuring the clearance of the tapered bearing of the reducer rotor shaft 31, such as Figure 1 As shown, it includes a stopping mechanism 10 and an axial loading mechanism 20; the axial loading mechanism 20 is used to apply axial force to the rotor shaft 31 of the reducer rotor shaft assembly 30 from bottom to top, and the stopping mechanism 10 is arranged above the axial loading mechanism 20, and is used to guide the rotor shaft 31 of the reducer rotor shaft assembly 30.

[0052] like Figure 2As shown, the stop mechanism 10 includes a first connecting portion 11, a second connecting portion 12, and a guide portion 13. The guide portion 13 has two ends connected to the first connecting portion 11 and the second connecting portion 12, respectively. The guide portion 13 is provided with a guide hole. During use, the first connecting portion 11 and the second connecting portion 12 are used to connect to the reducer rotor shaft assembly 30, so that the reducer rotor shaft assembly 30 is fixed between the stop mechanism 10 and the axial loading mechanism 20. The rotor shaft 31 of the reducer rotor shaft assembly 30 is disposed in the guide hole for guiding and fixing the rotor shaft 31. When the axial loading mechanism 20 applies an axial force to the rotor shaft 31, the rotor shaft 31 can move within the guide hole, ensuring that the rotor shaft 31 does not deviate after the axial force is applied, thereby improving the accuracy of the clearance measurement.

[0053] like Figure 2 As shown, the stop mechanism 10 is an axisymmetric structure, which further improves the accuracy of clearance measurement. Furthermore, the first connecting portion 11 is provided with a first mounting seat 111, and the second connecting portion 12 is provided with a second mounting seat 121. Both the first mounting seat 111 and the second mounting seat 121 are provided with mounting holes, which connect to the reducer rotor shaft assembly 30 through the mounting holes.

[0054] like Figure 3 As shown, the axial loading mechanism 20 includes a bracket 21, a thrust tooling 22, a force measuring device 23 and a pushing structure 24. The bracket 21 is provided with a connecting structure for connecting with the reducer rotor shaft assembly 30. The bracket 21 is connected to the pushing structure 24. The force measuring device 23 is provided at the pushing position of the pushing structure 24. The force measuring device 23 is connected to the thrust tooling 22.

[0055] Among them, such as Figure 4As shown, the pushing structure 24 includes a screw 241, a screw head 242, a handwheel 243 and a guide block 244. The screw head 242 is fixedly connected to the bracket 21. The upper end of the screw head 242 is provided with a groove, and the guide block 244 is provided in the groove. The lower end of the screw head 242 is provided with a threaded hole that passes through the groove. The threaded hole is connected to the screw 241, and the screw 241 is connected to the handwheel 243. The force measuring device 23 is arranged on the guide block 244, and the force measuring device 23 is fixed to the guide block 244 by bolts. The thrust tooling 22 is arranged on the force measuring device 23, and the thrust tooling 22 is fixed to the force measuring device 23 by bolts; the thrust tooling 22 includes a thrust structure 221 and a thrust ball bearing 222, and a boss is arranged on the thrust structure 221. The thrust ball bearing 222 is sleeved outside the boss, and the height of the top of the thrust bearing is lower than the height of the top of the boss. Because the rotor shaft 31 is an internal hollow hole, such a structure is more conducive to cooperation with the rotor shaft 31, ensuring the uniformity of the axial load applied to the rotor shaft 31 and improving the measurement accuracy of the clearance. This axial loading mechanism 20 applies an axial load to the rotor shaft 31 by manually pushing screw 241. Because there is a gap between the rollers and the inner and outer rings of the tapered bearings (large tapered bearing 35 and small tapered bearing 34), rapid loading can cause deflection. Manually applying the axial load slowly avoids deflection and improves clearance measurement accuracy. Simultaneously, a thrust ball bearing 222 is provided on the force measuring device 23. After manually applying the specified axial load, the rotor shaft 31 can be rotated to ensure that the rollers of the tapered bearings fully engage the inner and outer ring raceways, further improving clearance measurement accuracy.

[0056] Among them, such as Figure 4 As shown, the thrust structure 221 is provided with a guide hole, within which a guide light rod 25 is disposed. The guide rod 25 is fixedly connected to the bracket 21. At least two guide light rods 25 are provided; preferably, multiple guide light rods 25 are evenly spaced. This ensures uniform force and movement of the thrust fixture 22, thereby evenly applying force to the reducer rotor shaft assembly 30 and improving clearance measurement accuracy.

[0057] like Figure 5As shown, the reducer rotor shaft assembly 30 includes a rotor shaft 31, an upper casing 32, a lower casing 33, a small tapered bearing 34, a large tapered bearing 35 and a bearing spacer sleeve 36. The rotor shaft 31 is connected to the upper casing 32 through a roller bearing, the upper casing 32 is connected to the lower casing 33, the lower casing 33 is connected to the rotor shaft 31 through a large tapered bearing 35 and a small tapered bearing 34, and the lower casing 33 is also connected to the rotor shaft 31 through a positioning sleeve 37. The bearing spacer sleeve 36 is arranged between the large tapered bearing 35 and the small tapered bearing 34, and the large tapered bearing 35 and the small tapered bearing 34 are locked and fixed by a locking nut 38; at the same time, a connecting platform 39 is provided on the upper casing 32 for connecting with the axial loading mechanism 20 and the braking mechanism.

[0058] The measuring method comprises the following steps:

[0059] The reducer rotor shaft assembly 30 is placed on the axial loading mechanism 20, the connecting platform 39 is connected to the bracket 21, and then the stop mechanism 10, the rotor shaft 31 and the connecting platform 39 are connected; the fixing method can be an existing method, such as screw connection; Figure 3 As described above, a threaded column is provided on the bracket 21, and a connecting hole is provided on the connecting platform 39. By passing the threaded rod 211 through the connecting hole and the mounting hole, the reducer rotor shaft assembly 30 and the stopping mechanism 10 can be directly positioned and then fixed by bolts. The operation is simple, the assembly time is reduced, and the assembly efficiency is improved. A micrometer is also provided on the reducer rotor shaft assembly 30. In the structure with a locking nut 38, the micrometer is provided on the locking nut 38. Of course, this setting position is only an example.

[0060] The axial loading mechanism 20 applies an axial force to the reducer rotor shaft 31. The axial force can be determined by the force measuring device 23. The model of the force measuring device 23 is ZK2210100.

[0061] Obtain the clearance value measured by the dial indicator. The value measured by the dial indicator is the clearance value.

[0062] In some embodiments, as Figure 5 As shown, the F is obtained by the following formula: F=G+A;

[0063] Wherein: G=mg, m is the weight of the reducer rotor shaft assembly 30 - the weight of the upper casing 32 - the weight of the lower casing 33, g is the acceleration of gravity, and the value range of A is: 600~700.

[0064] In some embodiments, multiple dial indicators are provided, and the clearance value is averaged from the measured values ​​of these indicators. This has the advantage of improving the accuracy of clearance measurement. Preferably, the dial indicators are evenly arranged around the rotor shaft 31; if a locking nut 38 is provided, multiple dial indicators are evenly arranged around the locking nut 38, which has the advantage of reducing clearance measurement errors.

[0065] In some embodiments, the measurement method comprises the following steps:

[0066] S100: placing the speed reducer rotor shaft assembly 30 on the axial loading mechanism 20, and placing a plurality of dial indicators on the speed reducer rotor shaft assembly 30;

[0067] S200: The axial loading mechanism 20 applies an axial force F to the reducer rotor shaft 31;

[0068] S300: Obtaining a plurality of micrometer measurement values ​​and calculating an average value of the plurality of measurement values, wherein the average value is the clearance value.

[0069] In some embodiments, step S200 is repeated to obtain multiple sets of dial indicator measurement values, and multiple average values ​​are obtained. The maximum value among the multiple average values ​​is the clearance value. This can reduce measurement errors caused by uneven shaft force, thereby improving the accuracy of clearance measurement.

[0070] This embodiment also provides a method for manufacturing a reducer rotor shaft assembly 30. The reducer rotor shaft assembly 30 includes a rotor shaft 31, an upper casing 32, a lower casing 33, a small tapered bearing 34, a large tapered bearing 35, and a bearing spacer sleeve 36. The rotor shaft 31 is connected to the upper casing 32 via a roller bearing, the upper casing 32 is connected to the lower casing 33, and the lower casing 33 is connected to the rotor shaft 31 via a large tapered bearing 35 and a small tapered bearing 34. The bearing spacer sleeve 36 is disposed between the large tapered bearing 35 and the small tapered bearing 34. The manufacturing method includes the following steps:

[0071] Obtaining the target tapered bearing clearance M of the speed reducer rotor shaft assembly 30;

[0072] The initial length H of the bearing spacer sleeve is obtained by the target clearance, and the speed reducer rotor shaft assembly 30 is assembled according to the target clearance and the initial length of the bearing spacer sleeve 36;

[0073] The actual clearance is obtained by the clearance measurement method described above;

[0074] By the target clearance M and actual clearance μ NTo adjust the length H0 of the bearing spacer sleeve 36 of the reducer rotor shaft assembly 30, until the target clearance M and the actual clearance μ are obtained by the clearance measurement method. N If they are equal, a speed reducer rotor shaft assembly 30 that meets the requirements is obtained.

[0075] In some embodiments, as Figure 6 As shown, the initial length H of the bearing spacer sleeve 36 is obtained by the following formula:

[0076] H=M+(T1+T2+L)+δ-(B1+B2);

[0077] Among them: T1 is the total width of the large tapered bearing 35, T2 is the total width of the small tapered bearing 34, B1 is the inner ring width of the large tapered bearing 35, B2 is the inner ring width of the small tapered bearing 34, δ is the correction parameter, and L is the distance between the bearing spacer sleeve shoulders.

[0078] δ is calculated using the following formula:

[0079] δ=0.026(E1+E) / (πE1tanα1)+0.015(φ1-R1)tanα1

[0080] +0.026(E2+E) / (πE2tanα2)+0.015(φ2-R2)tanα2

[0081] Where: E: elastic modulus of rotor shaft material;

[0082] E1: elastic modulus of the inner ring material of the small tapered bearing;

[0083] E2: elastic modulus of the inner ring material of the large tapered bearing;

[0084] α1: cone angle of inner ring of small tapered bearing;

[0085] α2: cone angle of inner ring of large tapered bearing;

[0086] φ1: midpoint diameter of the inner ring of the small tapered bearing;

[0087] φ2: midpoint diameter of the inner ring of the large tapered bearing;

[0088] R1: diameter of inner ring of small tapered bearing;

[0089] R2: Diameter of the inner ring of the large tapered bearing.

[0090] Furthermore, adjusting the length of the bearing spacer sleeve 36 of the speed reducer rotor shaft assembly 30 by using the target clearance and the actual clearance includes the following steps:

[0091] Through the actual clearance μ N Obtain the length H0 of the bearing spacer sleeve;

[0092] If: H0<H, increase the length of the bearing spacer sleeve 36;

[0093] H0>H, reduce the length of the bearing spacer sleeve 36;

[0094] Where: μ N ∈(μ1,μ2,μ3,...,μ n ), n represents the number of times the micrometer is measured.

[0095] Furthermore, the length H0 of the bearing spacer sleeve is obtained by the following formula:

[0096] H0=H+(μ1+μ2+μ3+…+μ n ) / nM.

[0097] Furthermore, the length of the bearing spacer sleeve 36 is reduced by grinding. After grinding, it is ensured that the parallelism of both sides of the bearing spacer sleeve meets 0.005 mm, the roughness meets Ra0.8, and burrs are removed.

[0098] In the description of the present invention, 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 the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the specified features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0099] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical, electrical, or intercommunication connections; direct or indirect connections through an intermediary; and may encompass internal connectivity between multiple components or interactions between multiple components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0100] In the description of the present invention, it should be understood that all terms used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and cannot be understood as a limitation on the present invention.

[0101] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a reducer rotor shaft assembly, characterized in that: The speed reducer rotor shaft assembly (30) comprises a rotor shaft (31), an upper casing (32), a lower casing (33), a small tapered bearing (34), a large tapered bearing (35) and a bearing spacer sleeve (36), wherein the rotor shaft (31) is connected to the upper casing (32) via a roller bearing, the upper casing (32) is connected to the lower casing (33), the lower casing (33) is connected to the rotor shaft (31) via a large tapered bearing (35) and a small tapered bearing (34), and the bearing spacer sleeve (36) is arranged between the large tapered bearing (35) and the small tapered bearing (34). The manufacturing method comprises the following steps: Obtain the target clearance of the tapered bearing of the reducer rotor shaft assembly (30) ; The initial length of the bearing spacer sleeve (36) is obtained by the target clearance. , assembling a speed reducer rotor shaft assembly (30) according to the target clearance and the initial length of the bearing spacer sleeve (36); By target clearance and actual clearance To adjust the length of the bearing spacer sleeve (36) of the speed reducer rotor shaft assembly (30) , until the target clearance is obtained by the clearance measurement method and actual clearance If they are equal, a speed reducer rotor shaft assembly (30) that meets the requirements is obtained; The initial length of the bearing spacer sleeve (36) Obtained by the following formula: ; in: is the total width of the large tapered bearing (35), is the total width of the small tapered bearing (34), is the width of the inner ring of the Dazhui bearing, is the inner ring width of the small tapered bearing (34), To correct the parameters, is the distance between the bearing spacer sleeve (36) and the shoulder.

2. A method for manufacturing a reducer rotor shaft assembly according to claim 1, characterized in that: Adjusting the length of the bearing spacer sleeve (36) of the speed reducer rotor shaft assembly (30) by using the target clearance and the actual clearance comprises the following steps: Through the actual clearance Obtain the length of the bearing spacer sleeve (36) ; If: H0<H, increase the length of the bearing spacer sleeve (36); H0>H, reduce the length of the bearing spacer sleeve (36); in: , Indicates the number of times the dial indicator is measured.

3. The method for manufacturing a reducer rotor shaft assembly according to claim 1, characterized in that: The invention comprises a stop mechanism (10) and an axial loading mechanism (20); the axial loading mechanism (20) is used to apply an axial force from bottom to top to a rotor shaft (31) of a speed reducer rotor shaft assembly (30); the stop mechanism (10) is arranged above the axial loading mechanism (20) and is used to guide the rotor shaft (31) of the speed reducer rotor shaft assembly (30); The measurement of the actual clearance comprises the following steps: The speed reducer rotor shaft assembly (30) is arranged on the axial loading mechanism (20), and a micrometer is arranged on the speed reducer rotor shaft assembly (30); The axial loading mechanism (20) applies an axial force to the reducer rotor shaft (31) ; Obtain the actual clearance measured by the dial indicator.

4. A method for manufacturing a reducer rotor shaft assembly according to claim 3, characterized in that: The stop mechanism (10) comprises a first connecting portion (11), a second connecting portion (12) and a guide portion (13); two ends of the guide portion (13) are respectively connected to the first connecting portion (11) and the second connecting portion (12); and a guide hole is provided on the guide portion (13).

5. The method for manufacturing a reducer rotor shaft assembly according to claim 3, characterized in that: The axial loading mechanism (20) includes a bracket (21), a thrust tool (22), a force measuring device (23) and a thrust structure (24); the bracket (21) is provided with a connection structure for connecting to the reducer rotor shaft assembly (30); the bracket (21) is connected to the thrust structure (24); the force measuring device (23) is provided at the thrust position of the thrust structure (24); and the force measuring device (23) is connected to the thrust tool (22).

6. The method for manufacturing a reducer rotor shaft assembly according to claim 3, characterized in that: The axial force Obtained by the following formula: ; in: , The weight of the speed reducer rotor shaft assembly (30) minus the weight of the upper casing (32) minus the weight of the lower casing (33) is: is the acceleration due to gravity, The value range is: 600~700.

7. The method for manufacturing a reducer rotor shaft assembly according to claim 3, characterized in that: A plurality of micrometers are provided, and the actual clearance is obtained by taking an average value of the measured values ​​of the plurality of micrometers.

8. The method for manufacturing a reducer rotor shaft assembly according to claim 7, characterized in that: The measuring method comprises the following steps: S100: arranging the speed reducer rotor shaft assembly (30) on the axial loading mechanism (20), and arranging a plurality of micrometers on the speed reducer rotor shaft assembly (30); S200: The axial loading mechanism (20) applies an axial force to the reducer rotor shaft (31) ; S300: Obtaining a plurality of micrometer measurement values ​​and calculating an average value of the plurality of measurement values, wherein the average value is the clearance value.

9. A method for manufacturing a reducer rotor shaft assembly according to claim 8, characterized in that: Repeat step S200 to obtain multiple sets of measurement values ​​of multiple dial indicators, and obtain multiple sets of average values. The maximum value among the multiple sets of average values ​​is the actual clearance.

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