System and method suitable for replacing deep groove ball bearing without disassembling motor
By using the combination of the adaptation extension shaft, fixing assembly and urging components in the traction motor, the method of replacing the deep groove ball bearing without disassembly is realized, solving the problems of long replacement cycle and complex operation in the prior art, and improving maintenance efficiency and safety.
Patent Information
- Application Number
- CN202411745133.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-03-28
AI Technical Summary
The prior art requires disassembly of the motor during the replacement of the traction motor bearing, resulting in a long replacement cycle, complex operation and a risk of human operation errors.
A system and method suitable for replacing deep groove ball bearings without disassembly of the motor is adopted. By combining the adaptation extension shaft, fixing assembly and assembly of the rotating shaft is realized, and the bearing replacement process is simplified.
Reduce dependence on specific occasions and disassembly tools, shorten bearing replacement time, reduce maintenance costs and the risk of human operation errors, and improve motor maintenance efficiency.
Smart Images
Figure CN119727268A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of traction motors and relates to motor maintenance, and specifically to a system and method suitable for replacing deep groove ball bearings without disassembling a motor. Background Art
[0002] With the rapid development of rail transit, the operational maintenance requirements and technical level of rail vehicles are increasing day by day. In high-speed EMUs, electric locomotives, and diesel locomotives, traction motors are often used to provide power for trains. The traction motor is mainly composed of a stator and a rotor. After the motor is powered on, it drives the rotor to rotate at high speed through electromagnetic induction. As a high-speed rotating part, the shaft, in addition to its own processing accuracy, will affect the stability of the shaft operation. It is also necessary to ensure the stability and reliability of the bearings and other auxiliary workpieces. As the core component of the traction motor, the bearing can support the shaft and release torque. Therefore, the maintenance and inspection of the bearing is very critical. Relevant inspections or replacements are required when the specified mileage or time is reached.
[0003] According to the structure of the traction motor bearing unit currently in service, when the bearing is repaired and replaced, the traction motor is generally unloaded and returned to the maintenance base before being disassembled. During the disassembly process, the stator and rotor are first separated, and then the outer sealing ring and the bearing unit are withdrawn from the rotating shaft in sequence with the help of tooling and hydraulic devices, and finally the deep groove ball bearing is pulled out of the bearing chamber for replacement. After the bearing is replaced, the new bearing is pressed into the bearing chamber with tooling, and then the bearing chamber is reinstalled on the rotating shaft. Finally, the rotor is installed into the motor with the help of an overhead crane and tightened.
[0004] Therefore, how to simplify the traction motor bearing replacement process while avoiding motor disassembly and ensuring motor accuracy is a technical problem faced by technical personnel in this field.
[0005] Prior art 1: A company applied for "a method for disassembling and assembling motor bearings without disassembly", the main idea of which is: insert a mounting rod on the end face of the end cover, and install the clamping positioning piece and the abutting positioning piece in sequence, the two are alternately used to position the rotating shaft, complete the withdrawal and installation of the bearing unit, and finally complete the bearing replacement. The disadvantage of this technology is that it is only applicable to the motor structure design with the end cover and the bearing unit separated. Under the premise of not disassembling the end cover, only the replacement of the bearing unit is required to achieve the purpose. However, the design structure of some rail transit traction motors in use is different from it. When replacing the bearing, the end cover and the bearing unit need to be disassembled and assembled together to achieve the goal of replacing the bearing without disassembly. Obviously, this method is not universal, and it is not enough to guide the replacement of bearings without disassembly for some rail transit traction motor products.
[0006] Prior art 2: A company applied for "a clamping assembly tool suitable for motor bearings without disassembly and assembly", whose clamping assembly group is composed of a mounting ring and a clamping rod. Its clamping function is to insert the mounting rod in the circumferential direction of the end cover, and to set a through hole in the circumference of the mounting ring so that the mounting rod can pass through and hang. Each clamping rod can be synchronously extended or retracted along the circumferential direction of the installation to complete the fixing of the rotating shaft. This technology can realize the clamping and positioning functions of the motor rotating shaft, but because the size of the reserved through hole of the mounting ring is larger than the size of the mounting rod, the mounting ring will be tilted downward as a whole after being hung through the mounting hole. It is necessary to adjust the telescopic length of each clamping rod later to complete the correction of the rotating shaft height, which has high requirements on the operator and tooling design.
[0007] The current traction motor bearing replacement process has a long cycle, requires specific occasions and disassembly tools, and the disassembly process is cumbersome and cannot be simplified, which is not conducive to quickly solving the problem. In addition, replacing the bearing will lead to frequent disassembly of the motor. During the process of disassembling and reassembling the motor, it is difficult to accurately reset the rotor to its original position, which poses the risk of human error. Summary of the invention
[0008] In order to solve the above technical problems, the present invention provides a system and method suitable for replacing deep groove ball bearings without disassembling the motor. Combined with the motor end cover and the bearing unit design structure, a solution for replacing deep groove ball bearings is formed, which realizes the functions of fixing the rotating shaft and disassembling and assembling the motor end cover, thereby improving the motor maintenance efficiency.
[0009] The present invention is achieved by adopting the following technical solutions: A system suitable for replacing deep groove ball bearings without disassembling a motor, comprising a motor body, a support platform, a fixing assembly I, a fixing assembly II, an adapter extension shaft, a disassembly pull rod, a force-applying component mounting rod, a force-applying component and a disassembly end cover disc; an adapter plate is fixedly provided on the top of the base of the motor body, and a supporting crossbeam is fixedly provided between the support platform and the adapter plate; the output shaft of the motor body is connected to one end of the adapter extension shaft, and the other end of the adapter extension shaft is connected to the force-applying component mounting rod, and the force-applying component is sleeved on the force-applying component mounting rod ; An annular limit groove I and an annular limit groove II are provided on the transfer extension shaft, and the lower part of the fixing assembly I is engaged in the annular limit groove I after being hung on the supporting beam, and the lower part of the fixing assembly II is engaged in the annular limit groove II after being hung on the supporting beam; one end of the disassembly rod is threadedly inserted into the reserved threaded hole on the end cover of the motor body; the disassembly end cover disc is sleeved on the disassembly rod and fixed after being fitted with the force-applying component, and the force-applying component applies pressure to the transfer extension shaft and drives the disassembly end cover disc to move in the opposite direction to pull out the end cover.
[0010] When disassembling the motor end cover, use bolts to fix the adapter plate to the top of the motor body base, adjust the height of the support platform and the distance between the motor body, set up the support beam, and fix the two ends of the support beam to the reserved positions of the adapter plate and the support platform respectively; use studs to connect the adapter extension shaft to the output shaft of the motor body, and ensure that the end face of the adapter extension shaft fits the end face of the output shaft. Hang the fixing assembly I at the annular limit groove I of the adapter extension shaft to form axial and circumferential positioning; insert several disassembly rods axially in the reserved threaded holes on the end face of the end cover, and install the force component mounting rod on the side of the adapter extension shaft away from the motor. Put the force component on the force component mounting rod, install the disassembly end cover disc close to the end of the force component and fix it to the disassembly rod; the force component applies pressure to the end face of the adapter extension shaft, driving the disassembly end cover disc to move in the opposite direction, thereby pulling out the end cover. Then continue to move the end cover. When the end cover moves to between the annular limit groove I and the annular limit groove II, hang the fixing assembly II at the annular limit groove II of the transfer extension shaft, and remove the fixing assembly I at the same time to release its positioning on the transfer extension shaft; then continue to withdraw the end cover until it slides out of the end, completing the removal of the end cover.
[0011] Further preferably, it also includes a press-fit sleeve; the force-applying component mounting rod has an integral prefabricated thread; the press-fit sleeve is sleeved on the outside of the adapter extension shaft, and after the fixing nut is screwed into the outside of the force-applying component mounting rod to fix the force-applying component, the force-applying component applies pressure to the press-fit sleeve.
[0012] When installing the motor end cover, after replacing the new bearing, slide the end cover from the outer end of the transfer extension shaft until it is between the annular limit groove Ⅰ and the annular limit groove Ⅱ, hang the fixing assembly Ⅰ at the annular limit groove Ⅰ, then remove the fixing assembly Ⅱ, and continue to slide the end cover to the output shaft position of the motor body. Install the press-fit sleeve outside the transfer extension shaft, keep the position of the force-applying component mounting rod unchanged, then install the force-applying component, screw the fixing nut on the force-applying component mounting rod until the force-applying component is fixed. At this time, the open end of one side of the press-fit sleeve abuts against the inner ring of the deep groove ball bearing in the end cover, and the 250-degree end face on the other side abuts against the force-applying component. The deep groove ball bearing is moved to the predetermined bearing position by the pressure of the force-applying component, thereby driving the entire end cover to move until the end face fits the circumferential end face of the machine base. Tighten the end cover and complete the fixing of the circumferential positioning bolts of the end cover. Finally, remove the auxiliary tooling and restore the motor end cover side to its original state.
[0013] Further preferably, the press-fitting sleeve comprises a 250-degree arc-shaped cylinder, one side of the 250-degree arc-shaped cylinder has a 250-degree end face and the other side is open, a through hole is opened in the center of the 250-degree end face, and the diameter of the through hole is larger than the diameter of the force-applying component mounting rod. The mounting sleeve adopts a 250-degree arc design, which firstly avoids interference with the fixed combination in space, and secondly ensures that when the mounting sleeve is pushed, the force points are spaced 120 degrees apart, avoiding the bearing from being tilted during the press-fitting process.
[0014] Further preferably, the fixed assembly I and the fixed assembly II have the same structure. The fixed assembly I comprises a left splint frame and a right splint frame; the upper and lower docking parts of the left splint frame are respectively provided with connecting seats, and the upper and lower docking parts of the right splint frame are respectively provided with insertion ends, which are connected through a pin after being inserted into the connecting seat. The bottom surface of the insertion end of the upper part of the right splint frame is provided with a step, and the step of the insertion end is just engaged with the bottom surface of the connecting seat after the insertion end is inserted into the corresponding connecting seat. The end surface of the insertion end is a V-shaped end, and a V-shaped groove is matched in the connecting seat. The bottom of the left splint frame is provided with a left support positioning block, and the bottom of the right splint frame is provided with a right support positioning block. When the lower parts of the left splint frame and the right splint frame are docked, the left support positioning block and the right support positioning block are combined into a complete support positioning block and are located in the annular limiting groove I, and the surface of the support positioning block forms an arc to match the annular limiting groove I.
[0015] A method for replacing a deep groove ball bearing without disassembling a motor comprises the following steps: Step S1, use bolts to fix the adapter plate to the top of the motor body base, adjust the height of the support platform and the distance between the motor body, set up the support beam, and fix the two ends of the support beam to the reserved positions of the adapter plate and the support platform respectively; use studs to connect the adapter extension shaft to the output shaft of the motor body, and keep the end face of the adapter extension shaft in contact with the end face of the output shaft; Step S2, hang a fixing assembly I at the annular limiting groove I of the transfer extension shaft to form axial and circumferential positioning for it; insert a plurality of disassembly rods axially into the reserved threaded holes on the end face of the end cover, and install a force-applying component mounting rod on the side of the transfer extension shaft away from the motor; Step S3, sleeve the force-applying component on the force-applying component mounting rod, install the disassembly end cover disc close to the end of the force-applying component and fix it to the disassembly pull rod; the force-applying component applies pressure to the end surface of the transfer extension shaft, driving the disassembly end cover disc to move in the opposite direction, thereby pulling out the end cover; Step S4, continuously moving the end cover, when the end cover moves to between the annular limiting groove I and the annular limiting groove II, hanging the fixing assembly II at the annular limiting groove II of the transfer extension shaft, and disassembling the fixing assembly I at the same time, releasing its positioning for the transfer extension shaft; then continuously withdrawing the end cover until it slides out of the end, and completing the removal of the end cover; Step S5, after replacing the new bearing, slide the end cover from the outer end of the transfer extension shaft until it reaches between the annular limiting groove I and the annular limiting groove II, hang the fixing assembly I at the annular limiting groove I, then remove the fixing assembly II, and continue to slide the end cover to the output shaft position of the motor body; Step S6, install a press-fitting sleeve outside the adapter extension shaft, keep the position of the force-applying component installation rod unchanged, then install the force-applying component, screw the fixing nut on the force-applying component installation rod until the force-applying component is fixed, at this time, the open end of one side of the press-fitting sleeve abuts against the inner ring of the deep groove ball bearing in the end cover, and the 250-degree end face of the other side abuts against the force-applying component, and the deep groove ball bearing is moved to the predetermined bearing position by the press-fitting sleeve driven by the force-applying component, thereby driving the entire end cover to move until the end face fits with the circumferential end face of the machine base; Step S7, tighten the end cover and complete the fixing of the circumferential positioning bolts of the end cover, and finally disassemble the auxiliary system and restore the motor end cover side to its original state.
[0016] The technical solution provided by the present invention has the following advantages compared with the prior art: First, the method of the present invention can reduce the dependence on specific occasions and disassembly tools, eliminate the motor disassembly step, and directly replace the deep groove ball bearing of the traction motor to shorten the bearing replacement time, which is conducive to quickly solving the problem and reducing the maintenance cost of the traction motor.
[0017] Second, the method of the present invention avoids the frequent disassembly of the motor due to replacement of bearings, ensures that the accuracy of the rotor is not lost, and reduces the risk of human operational errors.
[0018] Thirdly, the system proposed by the method of the present invention completes the positioning of the rotating shaft by alternately fixing the transfer extension shaft in a fixed combination, and the rotating shaft is easy to fix and disassemble, which reduces the difficulty of operation and improves the convenience of use.
[0019] The invention is reasonably designed, and the method provides a way of replacing a deep groove ball bearing without disassembling a motor, and provides another option for replacing a deep groove ball bearing without disassembling a motor, and has good practical application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0022] Figure 1 The schematic diagram of the overall structure of the present invention is shown.
[0023] Figure 2 It is a schematic diagram showing the structure of the transfer extension shaft.
[0024] Figure 3 A schematic diagram showing the split structure of the fixed assembly.
[0025] Figure 4 A schematic diagram showing the overall structure of the fixed assembly.
[0026] Figure 5 Shows a cross-sectional view of a press-fit sleeve.
[0027] Figure 6 It shows the overall schematic diagram of the press-fit sleeve.
[0028] Figure 7 Schematic diagram showing the end cover being disassembled to the fixed assembly position I.
[0029] Figure 8 Schematic diagram showing the end cover being disassembled to the fixed assembly position II.
[0030] In the figure: 1-motor body, 2-support platform, 3-fixed assembly I, 4-fixed assembly II, 5-adapter extension shaft, 6-removal rod, 7-force component mounting rod, 8-force component, 9-removal end cover disc, 10-adapter plate, 11-support beam, 12-annular limit groove I, 13-annular limit groove II, 14-left support positioning block, 15-right support positioning block, 16-press-fit sleeve, 17-250 degree arc cylinder, 18-250 degree end face, 19-through hole, 20-left splint frame, 21-right splint frame, 22-connecting seat, 23-insertion end, 24-step, 25-V-shaped end, 26-V-shaped groove, 27-end cover, 28-output shaft. DETAILED DESCRIPTION
[0031] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
[0032] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.
[0034] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.
[0035] A system suitable for replacing deep groove ball bearings of a motor without disassembling the motor comprises a motor body 1, a support platform 2, a fixing assembly I3, a fixing assembly II4, a transfer extension shaft 5, a disassembly pull rod 6, a force component mounting rod 7, a force component 8, a disassembly end cover disc 9, and a press-fit sleeve 16.
[0036] like Figure 1 As shown, an adapter plate 10 is fixedly provided on the top of the motor base of the motor body 1. The adapter plate 10 has a through hole, and the adapter plate is fixed to the top of the motor by bolts based on the existing threaded holes on the top of the motor. A support beam 11 is fixedly provided between the support platform 2 and the adapter plate 10.
[0037] like Figure 2 As shown, the adapter extension shaft 5 is designed to be cylindrical, and threaded holes are provided at both end surfaces along the axis. The output shaft 28 of the motor body 1 and the adapter extension shaft 5 can be detachably connected by using studs. The output shaft 28 of the motor body 1 is connected to one end of the adapter extension shaft 5, and the other end of the adapter extension shaft 5 is connected to the force-applying component mounting rod 7. In this embodiment, the force-applying component mounting rod 7 is a hydraulic pump rod, which is pre-threaded as a whole, and the other end of the adapter extension shaft 5 is connected to the hydraulic pump rod by threading. The force-applying component 8 is sleeved on the force-applying component mounting rod 7; generally, the force-applying component 8 can be a pneumatic cylinder, a hydraulic cylinder or a drive motor, etc. In this embodiment, a hydraulic pump is used.
[0038] like Figure 1 , Figure 2As shown, the transfer extension shaft 5 has two circular grooves reserved at the fixed position, that is, the transfer extension shaft 5 is provided with an annular limit groove Ⅰ12 and an annular limit groove Ⅱ13, which are used to cooperate with the fixing assembly Ⅰ3 and the fixing assembly Ⅱ4 to complete the radial positioning of the rotating shaft. After the fixing assembly Ⅰ3 is hung on the supporting beam 11, its lower part is engaged in the annular limit groove Ⅰ12, and after the fixing assembly Ⅱ4 is hung on the supporting beam 11, its lower part is engaged in the annular limit groove Ⅱ13.
[0039] like Figure 3 , Figure 4 As shown, the fixed assembly I3 and the fixed assembly II4 have the same structure. The fixed assembly I3 includes a left clamping plate frame 20 and a right clamping plate frame 21; the upper and lower docking parts of the left clamping plate frame 20 are respectively provided with a connecting seat 22, and the upper and lower docking parts of the right clamping plate frame 21 are respectively provided with an insertion end 23, which is connected by a pin after being inserted into the connecting seat 22, that is, two center pin holes are reserved at the insertion ends and the connecting seats on the upper and lower sides of the two fixed assemblies, and a fixed assembly is formed by inserting a center pin. The bottom surface of the insertion end 23 at the upper part of the right clamping plate frame 21 is provided with a step 24, and after the insertion end 23 is inserted into the corresponding connecting seat 22, its step 24 is just engaged with the bottom surface of the connecting seat 22. The end surface of the insertion end 23 is a V-shaped end 25, and a V-shaped groove 26 is provided in the connecting seat 22. Therefore, the fixed assembly is designed as two fixed splint frames that can be opened and closed from the left and right sides. Two center pin holes are respectively provided on the upper and lower sides of the fixed splint frame, and the workpiece assembly is completed by inserting the center pin; in order to facilitate the assembly, the fixed splint frame is designed as an insertion structure. In addition, the lower position of the center pin on the upper part of the fixed splint frame is designed as a step structure. With this design, when the protruding parts on the upper and lower sides of the fixed splint frame are inserted into the reserved grooves of the fixed splint and moved to the 45° inclined matching position, the horizontal positioning of the fixed splint is completed, and the vertical positioning of the fixed splint is completed with the help of the steps. At this time, the fixed splint has been positioned, and only the center pins need to be inserted on the upper and lower sides to complete the assembly. A left supporting positioning block 14 is provided at the bottom of the left clamping plate frame 20, and a right supporting positioning block 15 is provided at the bottom of the right clamping plate frame 21. When the lower parts of the left clamping plate frame 20 and the right clamping plate frame 21 are connected, the left supporting positioning block 14 and the right supporting positioning block 15 are combined into a complete supporting positioning block and are located in the annular limiting groove Ⅰ12. The surface of the supporting positioning block forms an arc (or a semicircular groove) to cooperate with the annular limiting groove Ⅰ12. In this way, when the surface of the supporting positioning groove abuts against the arc surface at the predetermined position of the transfer extension shaft 5, the circumferential positioning of the transfer extension shaft 5 can be achieved at the same time.
[0040] like Figure 1As shown, the surface of the deep groove ball bearing unit side end cover 27 is provided with a plurality of threaded holes along the circumferential direction for cooperating with each disassembly rod 6, and the insertion position of each disassembly rod 6 on the end cover is in space and does not interfere with the fixed assembly. One end of the disassembly rod 6 is threadedly inserted into the reserved threaded hole on the end cover of the motor body 1; the disassembly end cover disc 9 is sleeved on the disassembly rod 6 and fixed after being attached to the force applying component 8. After the force applying component 8 applies pressure to the transfer extension shaft 5, it drives the disassembly end cover disc 9 to move in the opposite direction, thereby pulling out the end cover 27.
[0041] like Figure 1 As shown, the press-fitting sleeve 16 is sleeved on the outside of the adapter extension shaft 5 , and after the fixing nut is screwed into the outside of the force-applying component mounting rod 7 to fix the force-applying component 8 , the force-applying component 8 applies pressure to the press-fitting sleeve 16 .
[0042] like Figure 5 , Figure 6 As shown, the press-fit sleeve 16 includes a 250-degree arc-surface cylinder 17, one side of the 250-degree arc-surface cylinder 17 has a 250-degree end face 18, and the other side is open, which is used to abut the inner ring of the deep groove ball bearing. The press-fit sleeve is pressurized by a hydraulic device, so that the end cover with the deep groove ball bearing is pushed to the predetermined bearing position of the rotating shaft. A through hole 19 is opened in the center of the 250-degree end face 18, and the diameter of the through hole 19 is larger than the diameter of the force-applying component mounting rod 7.
[0043] In a specific implementation manner provided by the present invention, a method for replacing a deep groove ball bearing without disassembling a motor comprises the following steps: Step S1, use bolts to fix the adapter plate 10 on the top of the motor body 1 base, adjust the height of the support platform 2 and the distance between it and the motor body 1, set up the support beam 11, and fix the two ends of the support beam 11 on the reserved positions of the adapter plate 10 and the support platform 2 respectively; use studs to connect the adapter extension shaft 5 to the output shaft 28 of the motor body 1.
[0044] In the specific implementation, first use the reserved threaded holes on the top of the motor base to install the adapter plate, and adjust the height of the support platform until the adapter plate is consistent in height; in addition, the distance between the support platform and the adapter plate needs to be adjusted, and the fixed installation on both sides is completed according to the length of the support rail and the prefabricated hole position. The adapter extension shaft is designed to be cylindrical, with threaded holes prefabricated on both sides of the end face. One end is connected to the motor output shaft through a stud, and the other end is connected to the hydraulic pump rod.
[0045] Step S2, hang a fixing assembly I3 at the annular limit groove I12 of the adapter extension shaft 5 to form axial and circumferential positioning for it; insert a plurality of disassembly pull rods 6 axially into the threaded holes reserved on the end face of the end cover 27, and install a force-applying component mounting rod (hydraulic pump rod) 7 on the side of the adapter extension shaft 5 away from the motor.
[0046] During specific implementation, the disassembly rod 6 is inserted into each threaded hole on the end face of the end cover along the axial direction. Generally, the end face of the end cover is perpendicular to the horizontal plane and also perpendicular to the axial direction of the rotor shaft, and each mounting hole is generally opened horizontally and evenly distributed along the circumferential direction on the end face of the end cover. In addition, according to the initial design structure of the motor end cover and the radius of the reserved threaded holes, a fixed combination can be reasonably set to avoid interference in space. Generally, the end cover will be designed with mounting holes distributed along the circumference, and generally at least 4 can be selected at the same time, such as 4 to 10, and then the disassembly rod 6 is respectively inserted into the selected mounting holes.
[0047] Step S3, put the force component 8 on the force component mounting rod 7, install the disassembly end cover disc 9 close to the end of the force component 8 and fix it to the disassembly pull rod 6; the force component 8 applies pressure to the end surface of the transfer extension shaft 5, driving the disassembly end cover disc 9 to move in the opposite direction, thereby pulling out the end 27.
[0048] In the specific implementation, a force component 8 is sleeved on the hydraulic pump rod, and the hydraulic pump rod is pre-threaded as a whole. Generally, the force component 8 can be a pneumatic cylinder, a hydraulic cylinder or a drive motor, etc. In this embodiment, a hydraulic pump is used. One side of the force component 8 is close to the end face of the transfer extension shaft 5, and the other side is close to the disassembly end cover disc 9; at the same time, a through hole is pre-fabricated in the circumference of the disassembly end cover disc 9, and the position and size of the through hole are the same as the end cover hole position. This design allows the disassembly rod 6 to pass through the disassembly end cover disc 9, and the disassembly rod 6 and the disassembly end cover disc 9 are fixed with nuts. Finally, the end cover is pulled out by applying pressure from the hydraulic pump.
[0049] Step S4, continue to move the end cover 27. When the end cover 27 moves to between the annular limit groove Ⅰ12 and the annular limit groove Ⅱ13, hang the fixing assembly Ⅱ4 at the annular limit groove Ⅱ13 of the transfer extension shaft 5, and remove the fixing assembly Ⅰ3 at the same time to release its positioning on the transfer extension shaft 5; then continue to withdraw the end cover 27 until it slides out of the end, complete the end cover disassembly, and replace the deep groove ball bearing in the end cover 27.
[0050] like Figure 7 , Figure 8 As shown, when the end cap continues to move to the vicinity of the fixing assembly I, the fixing assembly II is installed so that its positioning groove can be close to the surface of the transfer extension shaft to achieve circumferential positioning, and then the fixing assembly I is removed. At this time, the end cap has enough sliding space to ensure that the end cap can slide out smoothly from the end of the transfer extension shaft.
[0051] Step S5, after replacing the new bearing, slide the end cover 27 from the outer end of the adapter extension shaft 5 until it reaches between the annular limit groove Ⅰ12 and the annular limit groove Ⅱ13, hang the fixing assembly Ⅰ3 at the annular limit groove Ⅰ12 and then remove the fixing assembly Ⅱ4, and also leave enough sliding space, and continue to slide the end cover 27 to the output shaft 28 position of the motor body 1.
[0052] Step S6, install the press-fitting sleeve 16 outside the adapter extension shaft 5, keep the position of the force-applying component mounting rod 7 unchanged, then install the force-applying component 8, screw the fixing nut on the force-applying component mounting rod 7 until the force-applying component 8 is fixed, at this time, the open end on one side of the press-fitting sleeve 16 abuts against the inner ring of the deep groove ball bearing in the end cover 27, and the 250-degree end face on the other side abuts against the force-applying component 8, and the deep groove ball bearing is driven to move to the predetermined bearing position by the pressure applied by the force-applying component 8.
[0053] In specific implementation, when the end cover moves to the vicinity of the motor shaft and cannot be pushed forward manually, the end cover needs to be pressed with the help of the installation sleeve and the force-applying component. The installation sleeve is away from the motor side and the reserved through hole, and the diameter of the through hole is slightly larger than the diameter of the hydraulic pump rod; in addition, the installation sleeve adopts a 250-degree arc design, which can first avoid interference with the fixed combination in space, and secondly ensure that when the installation sleeve is pushed, the force points are kept at an interval of 120 degrees to avoid the bearing being pressed and tilted during the press-fitting process. The adapter sleeve can be specifically designed according to the structure and size of the shaft and the adapter extension shaft. The installation sleeve is sleeved on the outside of the adapter extension shaft to keep the position of the hydraulic pump rod unchanged, and then the force-applying component is installed. After the fixing nut is screwed into the hydraulic pump stem away from the motor side until the force-applying component is fixed, the force-applying component pushes the end cover to drive the bearing to move until it reaches the predetermined bearing position of the shaft, thereby driving the entire end cover to move until the end face fits the circumferential end face of the base.
[0054] Step S7, tighten the end cover and complete the fixing of the circumferential positioning bolts of the end cover, and finally disassemble the auxiliary system and restore the motor end cover side to its original state.
[0055] The design features of the present invention are as follows: (1) The method for replacing bearings of a motor without disassembling the motor proposed in the present invention can be used for different bearing unit structural designs, such as when the bearing chamber is on the inner side of the end cover or the bearing chamber and the end cover are integrated into one design, both of which can realize bearing replacement.
[0056] (2) In order to facilitate the disassembly and assembly of the shaft fixing device and ensure the accuracy of the rotor, a two-side opening and closing design is selected to complete the disassembly and assembly. By reserving a center pin hole and using a latch method to complete the fixing splint assembly, this design is easy to disassemble and assemble, reducing the difficulty of implementation for operators.
[0057] (3) A semi-circular arc design is used to fix the rotating shaft. After being hung on the supporting crossbeam, the two semi-circular arcs are close to the reserved cylindrical surface of the transfer extension shaft to complete the radial support of the rotating shaft, avoiding the presence of too many intermediate parts that affect the disassembly accuracy of the bearing.
[0058] (4) Although the method of the present invention adopts the opening and closing disassembly and center pin fixing method to complete the motor shaft fixation, this design is only a more suitable example. Designers can choose other connection fixations to achieve this function according to actual needs.
[0059] (5) The method of the present invention is not only applicable to the disassembly and assembly of traditional insulating bearings, but also applicable to ceramic rolling bearings, etc.
[0060] (6) The support for the rotor in the method of the present invention mainly relies on the reserved holes on the top of the motor, which can be adjusted according to actual needs. Designers can make secondary adjustments to the support method based on this method.
[0061] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.
Claims
1. A system suitable for replacing deep groove ball bearings of a motor without disassembling the motor, comprising a motor body (1), a support platform (2), a fixing assembly I (3), a fixing assembly II (4), an adapter extension shaft (5), a disassembly pull rod (6), a force-applying component mounting rod (7), a force-applying component (8) and a disassembly end cover disc (9); characterized in that: An adapter plate (10) is fixedly provided on the top of the base of the motor body (1), and a support beam (11) is fixedly provided between the support platform (2) and the adapter plate (10); the output shaft (28) of the motor body (1) is connected to one end of the adapter extension shaft (5), and the other end of the adapter extension shaft (5) is connected to a force-applying component mounting rod (7), and the force-applying component mounting rod (7) is sleeved with a force-applying component (8); an annular limit groove I (12) and an annular limit groove II (13) are provided on the adapter extension shaft (5), and the fixed assembly I (3) is hung on After the support beam (11) is supported, its lower portion is engaged in the annular limit groove I (12); after the fixing assembly II (4) is hung on the support beam (11), its lower portion is engaged in the annular limit groove II (13); one end of the disassembly rod (6) is threadedly inserted into a reserved threaded hole on the end cover of the motor body (1); the disassembly end cover disc (9) is sleeved on the disassembly rod (6) and fixed after being fitted with the force-applying component (8); the force-applying component (8) applies pressure to the transfer extension shaft (5) and drives the disassembly end cover disc (9) to move in the opposite direction, thereby pulling out the end cover (27).
2. A system for replacing deep groove ball bearings without disassembling a motor according to claim 1, characterized in that: It comprises a press-fit sleeve (16); the force-applying component mounting rod (7) has an integral prefabricated thread; the press-fit sleeve (16) is sleeved on the outside of the adapter extension shaft (5); after a fixing nut is screwed into the outside of the force-applying component mounting rod (7) to fix the force-applying component (8), the force-applying component (8) applies pressure to the press-fit sleeve (16).
3. A system for replacing deep groove ball bearings without disassembling a motor according to claim 1, characterized in that: The press-fitting sleeve (16) comprises a 250-degree arc-surface cylinder (17), one side of the 250-degree arc-surface cylinder (17) has a 250-degree end surface (18) and the other side is open, a through hole (19) is formed at the center of the 250-degree end surface (18), and the diameter of the through hole (19) is greater than the diameter of the force-applying component mounting rod (7).
4. A system for replacing deep groove ball bearings without disassembling a motor according to claim 1, characterized in that: The fixing assembly I (3) and the fixing assembly II (4) have the same structure.
5. A system suitable for replacing deep groove ball bearings without disassembling a motor according to claim 4, characterized in that: The fixing assembly I (3) comprises a left clamping frame (20) and a right clamping frame (21); the upper and lower joints of the left clamping frame (20) are respectively provided with connecting seats (22), and the upper and lower joints of the right clamping frame (21) are respectively provided with insertion ends (23), and the insertion ends (23) are connected to the connecting seats (22) through a pin after being inserted into the connecting seats (22).
6. A system for replacing deep groove ball bearings without disassembling a motor according to claim 5, characterized in that: A step (24) is provided on the bottom surface of the insertion end (23) at the upper portion of the right clamping plate frame (21). After the insertion end (23) is inserted into the corresponding connecting seat (22), the step (24) is exactly engaged with the bottom surface of the connecting seat (22).
7. A system for replacing deep groove ball bearings of motors without disassembling them according to claim 5 or 6, characterized in that: The end surface of the insertion end (23) is a V-shaped end (25), and a V-shaped groove (26) is provided in the connection seat (22).
8. A system for replacing deep groove ball bearings of motors without disassembling them according to claim 7, characterized in that: The bottom of the left clamping plate frame (20) is provided with a left supporting positioning block (14), and the bottom of the right clamping plate frame (21) is provided with a right supporting positioning block (15). When the lower parts of the left clamping plate frame (20) and the right clamping plate frame (21) are butted against each other, the left supporting positioning block (14) and the right supporting positioning block (15) are combined into a complete supporting positioning block and are located in the annular limiting groove I (12). The surface of the supporting positioning block forms an arc to cooperate with the annular limiting groove I (12).
9. A system for replacing deep groove ball bearings of motors without disassembling them according to claim 1, characterized in that: The force-applying component is a pneumatic cylinder, a hydraulic cylinder or a driving motor.
10. A method for replacing deep groove ball bearings without disassembling a motor, characterized in that: The steps include: Step S1, using bolts to fix the adapter plate (10) to the top of the motor body (1) base, and at the same time adjusting the height of the support platform (2) and the distance between the support platform (2) and the motor body (1), erecting the support beam (11), and fixing the two ends of the support beam (11) to the reserved positions of the adapter plate (10) and the support platform (2), respectively; using studs to connect the adapter extension shaft (5) to the output shaft (28) of the motor body (1); Step S2, hang a fixing assembly I (3) at the annular limiting groove I (12) of the transfer extension shaft (5) to form axial and circumferential positioning for it; insert a plurality of disassembly rods (6) axially into the threaded holes reserved on the end surface of the end cover (27), and install a force-applying component installation rod (7) on the side of the transfer extension shaft (5) away from the motor; Step S3, sleeve the force-applying component (8) onto the force-applying component mounting rod (7), install the disassembly end cover disc (9) close to the end of the force-applying component (8) and fix it to the disassembly pull rod (6); the force-applying component (8) applies pressure to the end surface of the transfer extension shaft (5), driving the disassembly end cover disc (9) to move in the opposite direction, thereby pulling out the end cover (27); Step S4, continuously moving the end cover (27), when the end cover (27) moves to between the annular limiting groove I (12) and the annular limiting groove II (13), hanging the fixing assembly II (4) at the annular limiting groove II (13) of the transfer extension shaft (5), and simultaneously removing the fixing assembly I (3) to release the positioning of the transfer extension shaft (5); then continuously withdrawing the end cover (27) until it slides out of the end, completing the removal of the end cover, and replacing the deep groove ball bearing in the end cover (27); Step S5, after replacing the new bearing, slide the end cover (27) from the outer end of the transfer extension shaft (5) until it is between the annular limit groove I (12) and the annular limit groove II (13), hang the fixing assembly I (3) at the annular limit groove I (12), then remove the fixing assembly II (4), and continue to slide the end cover (27) to the position of the output shaft (28) of the motor body (1); Step S6, installing a press-fitting sleeve (16) outside the adapter extension shaft (5), keeping the position of the force-applying component mounting rod (7) unchanged, then installing the force-applying component (8), screwing a fixing nut onto the force-applying component mounting rod (7) until the force-applying component (8) is fixed, at which point the open end of one side of the press-fitting sleeve (16) abuts against the inner ring of the deep groove ball bearing in the end cover (27), and the 250-degree end face of the other side abuts against the force-applying component (8), and the deep groove ball bearing is driven to move to a predetermined bearing position by applying pressure to the press-fitting sleeve (16) through the force-applying component (8); Step S7, tighten the end cover and complete the fixing of the circumferential positioning bolts of the end cover, and finally disassemble the auxiliary system and restore the motor end cover side to its original state.