CN217159459U - Inner cone structure of traction motor rotating shaft with multiple interference - Google Patents
Inner cone structure of traction motor rotating shaft with multiple interference Download PDFInfo
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- CN217159459U CN217159459U CN202122897923.XU CN202122897923U CN217159459U CN 217159459 U CN217159459 U CN 217159459U CN 202122897923 U CN202122897923 U CN 202122897923U CN 217159459 U CN217159459 U CN 217159459U
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- 238000004080 punching Methods 0.000 claims abstract description 17
- 230000004323 axial length Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model discloses a multi-interference traction motor rotating shaft inner cone structure, which comprises a traction motor rotating shaft, a rotor punching sheet, an end cover, a pinion, a bearing retainer ring, a bearing, an inner oil seal, an end ring and a rotor pressing ring; an inner taper hole is formed in the rotating shaft of the traction motor, a pinion outer taper shaft is arranged on the pinion, the pinion outer taper shaft is inserted into the inner taper hole, and torque is transmitted through interference fit; the bearing retainer ring, the bearing and the traction motor rotating shaft are assembled in an interference fit manner to fix the bearing outside the traction motor rotating shaft; the rotor punching sheet and the rotor pressing ring are sequentially sleeved on the periphery of a rotating shaft of the traction motor in an interference fit assembly manner; an inner oil seal and an end ring are arranged between the bearing and the rotor pressing ring; the end cover is sleeved on the periphery of the bearing; at least one section of second taper which is flared outwards is arranged at the tail end of the inner taper hole. The inner cone structure has the beneficial effect of ensuring the structural safety of the inner cone hole of the motor rotating shaft while solving the problem of overlarge local assembly stress.
Description
Technical Field
The utility model relates to a traction motor transmission technical field specifically indicates an interior cone structure of traction motor pivot of multiple interference.
Background
At present, an inner cone structure of a rotating shaft of a traction motor is often applied to a transmission system of the traction motor, torque is transmitted by an interference fit mode of an outer cone shaft of a pinion and an inner cone hole of the rotating shaft of the motor, and interference magnitude must be capable of ensuring that the outer cone shaft of the pinion and the inner cone hole of the rotating shaft of the motor do not slide or rotate relatively. The taper proportion of an outer cone shaft or an inner cone hole of a conventional inner cone structure is fixed, but when a rotating shaft with the inner cone hole is assembled with other components in an interference fit mode, the outer cone shaft of a pinion and the rotating shaft of a motor are in a multiple interference state, so that the local actual interference magnitude is too large, the local assembly stress is increased, particularly, stress concentration exists at the edge position of the multiple interference, fatigue failure is easily caused, even major mechanical faults such as rotating shaft fracture are caused, and the design requirement cannot be met. How to realize the reliable and safe torque transmission of the multi-interference inner cone structure, the overlarge local actual interference and the overlarge local assembly stress caused by the multi-interference are avoided, and the problem that the safe and reliable inner cone structure of the rotating shaft of the traction motor is required to be solved in the design of the motor is ensured.
In view of this problem, the inventor of the present patent application has designed a patent application with the following number: 2020212539610, the patent names: the utility model provides a vehicle, traction motor and the interior cone structure's of traction motor pivot of multiple interference utility model patent scheme, it is too big to have proposed in this scheme a method through setting up the guide cone at pinion outer cone axle end to reduce local actual magnitude of interference to reduce the stress of multiple interference border position. The inventor of the present patent application verifies through further practice that the above-mentioned solution can effectively solve the problem of excessive stress of the partial assembly, but brings about a new problem that more stress is transferred to the inner taper hole of the rotating shaft, and the inner taper hole of the rotating shaft is generally of a relatively thin-walled structure relative to the outer taper shaft of the pinion, and needs to be protected in the actual use process. That is, the solutions disclosed in the prior art cannot ensure the structural safety of the inner taper hole of the motor shaft while solving the problem of excessive local assembly stress.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an interior cone structure of traction motor pivot of multiple interference that can ensure the structure safety of the interior taper hole of motor pivot when solving the too big problem of local assembly stress.
In order to solve the technical problem, the utility model provides a technical scheme does: a multi-interference inner cone structure of a rotating shaft of a traction motor comprises the rotating shaft of the traction motor, a rotor punching sheet, an end cover, a pinion, a bearing retainer ring, a bearing, an inner oil seal, an end ring and a rotor retainer ring; an inner taper hole is formed in the rotating shaft of the traction motor, a pinion outer taper shaft is arranged on the pinion, and the pinion outer taper shaft is inserted into the inner taper hole and transmits torque through interference fit; the bearing retainer ring, the bearing and the traction motor rotating shaft are assembled in an interference fit manner to fix the bearing outside the traction motor rotating shaft; the rotor punching sheet and the rotor pressing ring are sequentially sleeved on the periphery of a rotating shaft of the traction motor in an interference fit assembly manner; an inner oil seal and an end ring are arranged between the bearing and the rotor pressing ring; the end cover is sleeved on the periphery of the bearing; at least one section of second taper which is flared outwards is arranged at the tail end of the inner taper hole.
Preferably, the axial length of the second taper is the length of the outer cone shaft of the pinion, the rotor pressing ring and the rotor punching sheet which are overlapped in the axial direction.
Preferably, the included angle between the second taper and the first taper is phi, the deformation at the starting point of the second taper is i, the deformation at the tail end of the second taper is j, the axial length of the second taper is L, and the angle of the second taper is set to be j
Preferably, the end of the outer conical shaft of the pinion is provided with a third conical degree which is contracted inwards and corresponds to the second conical degree; the third taper is used for adjusting the interference assembly stress in cooperation with the second taper.
Preferably, the second taper is a two-segment structure, and the flaring angle of each segment is different.
After the structure is adopted, the utility model discloses following beneficial effect has: the creative interior taper that has shifted the traction motor pivot with the epaxial tapering of pinion outer cone of this patent application is terminal, can be when satisfying interior cone structure safety, transmit the moment of torsion reliably, avoid too big by the local assembly stress that multiple interference produced, reduce the stress concentration of the marginal position of multiple interference, greatly reduce traction motor operation in-process pivot interior cone structure because the probability that the stress is too big leads to losing efficacy. In the preferred item, the length and angle of the second taper are further limited, so that the overall performance of the inner taper structure can be better, and the introduction of the third taper and the design of the multi-section taper structure can better adapt to more complicated stress concentration conditions and fittings with different sizes.
To sum up, the utility model provides an interior cone structure of traction motor pivot of multiple interference that can ensure the structure safety of the interior taper hole of motor shaft when solving the too big problem of local assembly stress.
Drawings
FIG. 1 is a schematic view of an inner cone structure of a rotating shaft of a traction motor according to the present invention;
fig. 2 is a schematic view of a pinion structure according to the present invention;
FIG. 3 is a schematic view of a cone hole section in a rotating shaft of the traction motor of the present invention;
FIG. 4 is an enlarged view of a second taper at the end of the tapered bore in the shaft of FIG. 3;
FIG. 5 is a schematic view of a rotor clamping ring structure in accordance with an embodiment of the present invention;
fig. 6 is the utility model discloses under the well no pinion condition, interior taper structure assembly structure of traction motor and multiple interference down shaft inner cone hole second taper position sketch map.
As shown in the figure: 1. a traction motor shaft; 2. rotor punching sheets; 3. an end cap; 4. a pinion gear; 5. a bearing retainer ring; 6. a bearing; 7. an inner oil seal; 8. an end ring; 9. pressing a ring by a rotor; 401. a pinion outer cone shaft; 402. pinion gear teeth; A. the end of the inner taper hole of the rotating shaft is at a second taper position; B. a second taper extension line; C. a first taper extension line; phi, the included angle between the second taper and the first taper; l, length of the second taper.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
With reference to fig. 1 to 6, the multi-interference traction motor rotating shaft inner cone structure comprises a traction motor rotating shaft 1, a rotor punching sheet 2, an end cover 3, a pinion 4, a bearing retainer ring 5, a bearing 6, an inner oil seal 7, an end ring 8 and a rotor pressing ring 9; an inner taper hole is formed in the traction motor rotating shaft 1, a pinion outer taper shaft 401 is arranged on the pinion 4, and the pinion outer taper shaft 401 is inserted into the inner taper hole and transmits torque through interference fit; the bearing retainer ring 5, the bearing 6 and the traction motor rotating shaft 1 are assembled in an interference fit manner to fix the bearing 6 outside the traction motor rotating shaft 1; the rotor punching sheet 2 and the rotor pressing ring 9 are sequentially sleeved on the periphery of the rotating shaft 1 of the traction motor in an interference fit assembly manner; an inner oil seal 7 and an end ring 8 are arranged between the bearing 6 and the rotor pressing ring 9; the end cover 3 is sleeved on the periphery of the bearing 6; at least one section of second taper which is flared outwards is arranged at the tail end of the inner taper hole.
Preferably, the axial length of the second taper is a length of the pinion outer cone shaft 401 overlapping with the rotor pressing ring 9 and the rotor punching sheet 2 in the axial direction.
Preferably, the included angle between the second taper and the first taper is phi, the deformation at the starting point of the second taper is i, the deformation at the tail end of the second taper is j, the axial length of the second taper is L, and the angle of the second taper is set to be j
Preferably, the end of the pinion outer cone shaft 401 is provided with a third taper which is contracted inwards and corresponds to the second taper; the third taper is used for adjusting the interference assembly stress in cooperation with the second taper.
Preferably, the second taper is a two-segment structure, and the flaring angle of each segment is different.
When the torque-adjustable traction motor is specifically implemented, the traction motor rotating shaft 1 and the pinion 4 are in interference fit to transmit torque, specific interference magnitude needs to be determined according to the torque magnitude, and the adjustment of the interference magnitude is controlled through the axial push-in distance of the pinion. The bearing retainer ring, the bearing and the traction motor rotating shaft are assembled in an interference fit mode to fix the bearing. The rotor punching sheet, the rotor pressing ring and the traction motor rotating shaft are assembled in an interference fit mode. Therefore, the pinion outer cone shaft and the traction motor rotating shaft are in a multiple interference state, the practice and simulation show that after the bearing inner ring 5 of the bearing 6 is in interference assembly with the traction motor rotating shaft 1, the deformation a of the rotating shaft inner cone hole can be generated in the radial direction, the interference magnitude required for safely and reliably transmitting torque is calculated to be b, and the design requirement can be met when the interference magnitude of the pinion outer cone shaft and the traction motor rotating shaft inner cone hole is c-b-a, and the assembly stress can be reduced.
The interior cone structure because pinion outer cone shaft and traction motor pivot are in multiple interference state, especially rotor clamping ring and rotor punching and traction motor pivot's interference fit interference, be in traction motor pivot inner cone hole's border position, the shrink effect of rotor clamping ring and rotor punching to inner cone hole makes the local actual magnitude of interference of interior cone afterbody too big, local assembly stress increases thereupon, there is stress concentration, the scheme that this patent application discloses can reduce local assembly stress after the terminal second cone degree that sets up certain length and certain angle in pivot inner cone hole, reduce stress concentration, do not influence the reliability of moment of torsion simultaneously, safe transmission. The specific length of the second taper is determined according to the positions of the outer conical shaft of the pinion, the rotor pressing ring and the rotor punching sheet in a multiple interference state, and the axial length L of the second taper is the length of the outer conical shaft of the pinion, the rotor pressing ring and the rotor punching sheet which are overlapped in the axial direction.
With respect to the confirmation of the angle of the taper corresponding to the second taper position a at the end of the rotating shaft inner taper hole in fig. 3, as shown in fig. 4, the angle Φ between the second taper and the first taper (i.e. the acute included angle formed by the second taper extension line B and the first taper extension line C) is determined according to the deformation of the rotating shaft inner taper hole of the traction motor under the multiple interference condition, in the absence of the pinion, the deformation amount of the rotating shaft inner taper hole of the traction motor can be obtained through simulation calculation, due to stress concentration, the deformation at the edge position of the inner taper hole is larger, it is assumed that the deformation amount at the starting point of the second taper is i, the deformation amount at the end is j, and the angle of the second taper is j
The method can reduce the local assembly stress and reduce the stress concentration, and simultaneously does not influence the reliable and safe transmission of the torque.
The present invention and the embodiments thereof have been described above, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto, and other equivalent structures having the same effect, such as the arc-shaped groove, can be equally replaced by the taper. In summary, it should be understood that those skilled in the art should also understand the scope of the present invention without inventively designing the similar structure and embodiments of the present invention without departing from the spirit of the present invention.
Claims (5)
1. A multi-interference traction motor rotating shaft inner cone structure comprises a traction motor rotating shaft (1), a rotor punching sheet (2), an end cover (3), a pinion (4), a bearing retainer ring (5), a bearing (6), an inner oil seal (7), an end ring (8) and a rotor pressing ring (9); an inner taper hole is formed in the traction motor rotating shaft (1), a pinion outer taper shaft (401) is arranged on the pinion (4), and the pinion outer taper shaft (401) is inserted into the inner taper hole and transmits torque through interference fit; the bearing retainer ring (5), the bearing (6) and the traction motor rotating shaft (1) are assembled in an interference fit manner to fix the bearing (6) outside the traction motor rotating shaft (1); the rotor punching sheet (2) and the rotor pressing ring (9) are sequentially sleeved on the periphery of the traction motor rotating shaft (1) through interference fit assembly; an inner oil seal (7) and an end ring (8) are arranged between the bearing (6) and the rotor pressing ring (9); the end cover (3) is sleeved on the periphery of the bearing (6); the method is characterized in that: at least one section of second taper which is flared outwards is arranged at the tail end of the inner taper hole.
2. The multi-interference traction motor rotating shaft inner cone structure according to claim 1, wherein: the axial length of the second taper is the length of the outer conical shaft (401) of the pinion, the rotor pressing ring (9) and the rotor punching sheet (2) which are overlapped in the axial direction.
3. The multi-interference traction motor rotating shaft inner cone structure according to claim 1, wherein: respectively setting the included angle between the second taper and the first taper as phi, the deformation at the starting point of the second taper as i, the deformation at the tail end of the second taper as j, the axial length of the second taper as L and the angle of the second taper as j
。
4. The multi-interference traction motor rotating shaft inner cone structure according to claim 1, wherein: the tail end of the outer conical shaft (401) of the pinion is provided with a third conical degree which is contracted inwards and corresponds to the second conical degree; the third taper is used for adjusting the interference assembly stress in cooperation with the second taper.
5. The multi-interference traction motor rotating shaft inner cone structure according to claim 1, wherein: the second taper is a two-section structure, and the outward-expanding angle of each section is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122897923.XU CN217159459U (en) | 2021-11-24 | 2021-11-24 | Inner cone structure of traction motor rotating shaft with multiple interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122897923.XU CN217159459U (en) | 2021-11-24 | 2021-11-24 | Inner cone structure of traction motor rotating shaft with multiple interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217159459U true CN217159459U (en) | 2022-08-09 |
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ID=82684593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122897923.XU Active CN217159459U (en) | 2021-11-24 | 2021-11-24 | Inner cone structure of traction motor rotating shaft with multiple interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217159459U (en) |
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2021
- 2021-11-24 CN CN202122897923.XU patent/CN217159459U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20240204 Address after: 412001 Tianxin high tech Industrial Park, Shifeng District, Zhuzhou City, Hunan Province Patentee after: CRRC Zhuzhou Electric Co.,Ltd. Country or region after: China Patentee after: China National Railway Group Co.,Ltd. Address before: 412001 Tianxin high tech Industrial Park, Shifeng District, Zhuzhou City, Hunan Province Patentee before: CRRC Zhuzhou Electric Co.,Ltd. Country or region before: China |