CN112713694B - Non-transmission end bearing mounting structure of traction motor - Google Patents
Non-transmission end bearing mounting structure of traction motor Download PDFInfo
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- CN112713694B CN112713694B CN202011565064.8A CN202011565064A CN112713694B CN 112713694 B CN112713694 B CN 112713694B CN 202011565064 A CN202011565064 A CN 202011565064A CN 112713694 B CN112713694 B CN 112713694B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1735—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at only one end of the rotor
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Abstract
The invention relates to a bearing mounting structure, in particular to a traction motor non-transmission end bearing mounting structure, and aims to solve the technical problem that a traction motor non-transmission end bearing is damaged greatly during disassembly. The inner seal ring is uniformly provided with a plurality of first screw holes, the end cover is uniformly provided with a plurality of first through holes, the outer bearing cover is uniformly provided with a plurality of second through holes, the outer seal ring is uniformly provided with a third through hole, the first through hole and the second through hole are coaxially corresponding one by one and can be coaxially corresponding to the first screw holes one by one through a rotating shaft, the third through hole and the first screw holes are coaxially corresponding one by one, the diameters of the first through hole, the second through hole and the third through hole are all larger than those of the first screw holes, the outer bearing cover is uniformly provided with a plurality of second screw holes, the outer seal ring is uniformly provided with a fourth through hole, the fourth through hole and the second screw holes can be coaxially corresponding one by rotating the rotating shaft, the diameter of the fourth through hole is larger than that of the second screw holes, the third through hole corresponds to the first through hole when the fourth through hole and the second screw holes correspond, the end surface of the rotating shaft is provided with the third screw hole, and the center of the outer seal ring is provided with the fifth through hole.
Description
Technical Field
The invention relates to a bearing mounting structure, in particular to a traction motor non-transmission end bearing mounting structure.
Background
And an insulating cylindrical roller bearing and an insulating deep groove ball bearing are respectively arranged at two ends of a main traction motor of the subway vehicle. Usually, the insulated deep groove ball bearing is arranged as a positioning bearing at a non-transmission end with smaller load and impact and is arranged together with a heat radiation fan of the traction motor. In order to shorten the axial length of the motor, the heat dissipation fan is usually designed as a centrifugal fan (in a horn shape, the inside is small and the outside is large), and the insulation deep groove ball bearing needs to be completely arranged in a horn mouth of the heat dissipation fan (firstly, the temperature of the bearing is reduced, and secondly, the axial length is shortened), so that when the insulation deep groove ball bearing is replaced by the traction motor, the outer space is blocked by the fan, and the insulation deep groove ball bearing can only be detached by pulling the non-transmission end cover.
As shown in fig. 9, an end portion of the conventional rotating shaft at the non-transmission end is sequentially provided with an inner seal ring, an end cover, a bearing, an outer bearing cover, an outer seal ring and an outer cover from inside to outside along an axial direction thereof, an inner circumferential surface of the inner seal ring is fitted over the rotating shaft in an interference manner, an inner end surface of the inner seal ring abuts against a shaft shoulder and an outer end surface abuts against an inner ring of the bearing (generally, the axial length of the inner seal ring is slightly greater than the length of a corresponding shaft section), an outer end surface of the inner seal ring and the inner end surface of the end cover are sealed by a labyrinth structure, the end cover is in interference fit with a base spigot and is locked by a bolt, the inner circumferential surface of the end cover forms a step-by-step enlarged three-step hole along the axial direction, the three-step hole is respectively used for mounting the bearing, the outer bearing cover and the outer cover, the outer ring is fitted over the inner circumferential surface of the end cover in an interference manner and the inner ring is fitted over the rotating shaft in an interference manner, the inner end face of the bearing outer ring is abutted against the stepped face, the outer end face of the bearing outer ring is abutted against the inner end face of the outer bearing cover (generally, the axial length of the bearing outer ring is slightly larger than the length of the corresponding stepped hole section), the outer bearing cover is fixed on the stepped face of the end cover through bolts, the outer peripheral face of the outer bearing cover is in interference fit with the inner peripheral face of the end cover, the inner peripheral face of the outer bearing cover and the outer peripheral face of the outer seal ring form a labyrinth seal structure, the outer end face of the bearing inner ring is abutted against the inner end face of the outer seal ring (generally, the outer end face of the bearing inner ring is slightly protruded from the outer side shoulder of the corresponding shaft section), the outer seal ring is fixed on the end face of the rotating shaft through bolts, the outer seal ring is in interference fit on the rotating shaft, the outer end face of the end cover is fixed on the outer end face of the end cover through bolts, and the outer end cover is in interference fit on the inner peripheral face of the end cover. When the bearing is replaced, the outer cover and the outer seal rings at two ends are firstly removed, the end cover is pulled through the end cover jackscrew hole to separate the stator and the rotor, then the rotating shaft is fixed on a tool, the end cover is pulled outwards through the jackscrew hole in the outer bearing cover, the pulling force is transmitted to the outer ring of the bearing from the end cover, the outer ring of the bearing acts on the balls, the balls transmit the force to the inner ring of the bearing, and therefore the insulating deep groove ball bearing is detached from the rotating shaft by overcoming the friction force. Because of the pivot is very big with insulating deep groove ball bearing interference magnitude, the ball need transmit very big effort during the dismantlement, so insulating deep groove ball bearing damages the risk height. The bearing is used as the most precise core part of the motor, and the driving safety can be influenced by slight damage. Therefore, there is an urgent need for a bearing mounting structure for non-transmission end without damage during bearing disassembly.
Disclosure of Invention
The invention aims to solve the technical problem that the bearing at the non-transmission end of the traction motor is damaged greatly during disassembly.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a traction motor non-transmission end bearing mounting structure, which comprises a rotating shaft, the tip that is located the non-transmission end of pivot installs interior seal ring from inside to outside in proper order along its axial, the end cover, a bearing, outer bearing cover, outer seal ring and enclosing cover, the outer lane (being radial outside) of interior seal ring has a plurality of first screws (axis is parallel with the pivot) along the circumference equipartition, the end cover has a plurality of first through-holes (axis is parallel with the pivot) along the circumference equipartition, outer bearing cover has a plurality of second through-holes (axis is parallel with the pivot) along the circumference equipartition, outer seal ring has third through-holes (axis is parallel with the pivot) along the circumference equipartition, first through-hole and second through-hole one-to-one coaxial correspondence (being one-to-one, and corresponding coaxial) and can be with first screw one-to-one through the rotatory pivot, third through-hole and first through-hole one-to-one coaxial correspondence, first through-hole, the diameter of second through-hole and third through-hole all is greater than the first through-hole diameter of the first through-hole, outer bearing cover equipartition has a plurality of second screw along the circumference, outer seal ring is greater than the diameter of the fourth through-hole, the diameter of the central through-hole of the fourth through-hole is greater than the diameter of the fourth through-hole, the third through-hole, the diameter of the central through-hole is equipped with the fourth through-hole, the central through-hole is equipped with the central through-hole, the central through-hole.
Furthermore, the outer end face of the inner seal ring is provided with a groove for circumferential positioning, the rotating shaft is provided with a positioning hole corresponding to the groove, and the positioning hole is provided with a positioning pin inserted into the positioning hole.
Furthermore, a gap is reserved between the inner end face of the outer bearing cover and the end cover, and steel plate paper is padded in the gap.
Furthermore, a counter bore is formed in the outer end of the first screw hole.
Furthermore, the inner ring of the outer seal ring is provided with a plurality of fourth screw holes which are uniformly distributed along the circumferential direction, the outer seal ring is fixed on the end surface of the rotating shaft through locking screws which are inserted into the fourth screw holes in a penetrating mode, and the number of the fourth screw holes is equal to the diameter of the second screw holes and equal to the number of the fourth screw holes.
Furthermore, an internal locking type stop gasket is arranged between the head of the locking screw and the outer seal ring.
Furthermore, the diameters of the first through hole, the second through hole and the third through hole are equal, and the diameters of the first screw hole and the second screw hole are equal.
Further, the first through hole, the second through hole, the third through hole and the fourth through hole are all phi 10 holes, the first screw hole and the second screw hole are all M8 holes, the third screw hole is M20 hole, and the fifth through hole is phi 28 hole.
Furthermore, the number of the first screw hole, the number of the second screw hole, the number of the first through hole, the number of the second through hole, the number of the third through hole and the number of the fourth through hole are all three.
The beneficial effects of the invention are:
the invention provides a traction motor non-transmission end bearing mounting structure, which is characterized in that through holes or screw holes are additionally arranged on an inner seal ring, an end cover, an outer bearing cover and the outer seal ring, so that the outer seal ring, the outer bearing cover, the end cover and the inner seal ring can be integrally dismounted by means of a tool during dismounting, the front end face and the rear end face of a bearing inner ring and the front end face and the rear end face of a bearing outer ring are in a limiting state during dismounting, excessive pulling of the bearing inner ring and the bearing outer ring cannot occur, and bearing damage caused by ball overload is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the disassembled and assembled structure of the present invention;
FIG. 2 is a schematic view of the assembled structure of the present invention;
FIG. 3 is a schematic structural view of a rotating shaft of the present invention;
FIG. 4 is a schematic structural view of the inner seal ring of the present invention;
FIG. 5 is a schematic structural view of the end cap of the present invention;
FIG. 6 is a schematic view of the construction of the outer bearing cap of the present invention;
FIG. 7 is a schematic structural view of the outer seal ring of the present invention;
FIG. 8 is a schematic view of the structure of the outer lid of the present invention;
fig. 9 is a schematic view of a prior art non-transmission end mounting structure of a rotating shaft.
In the figure:
10 \ 9476, rotating shaft; 11 \ 9476and a third screw hole; 12 \9476, positioning holes; 20 \ 9476, inner sealing ring; 21 \ 9476, a first screw hole; 22 \9476, and grooves; 30 \ "9476and end cover; 31 \ 9476, a first through hole; 40 \ 9476and bearing; 50 \ 9476, outer bearing cover; 51 \ 9476and a second through hole; 52 \ 9476and a second screw hole; 60 \ 9476, and an outer sealing ring; 61 \ 9476and a third through hole; 62 \ 9476and a fourth through hole; 63 \ 9476and a fifth through hole; 64 \ 9476, a fourth screw hole; 70 \ 9476, and an outer cover; 80 \ "9476and steel paperboard.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Referring to fig. 1 to 8, the non-transmission end bearing installation structure of a traction motor of the present invention includes a rotating shaft 10, an inner seal ring 20, an end cover 30, a bearing 40, an outer bearing cover 50, an outer seal ring 60 and an outer cover 70 are sequentially installed along an axial direction outward at an end portion of the rotating shaft 10 located at a non-transmission end, where an assembly structure of the aforementioned components belongs to the prior art, that is, an inner circumferential surface of the inner seal ring 20 is interference-sleeved on the rotating shaft 10, an inner end surface of the inner seal ring 20 abuts against a shaft shoulder and an outer end surface abuts against an inner ring of the bearing 40, an outer end surface of the inner seal ring 20 and the inner end surface of the end cover 30 are sealed by a labyrinth structure, the end cover 30 is interference-fitted with a base spigot and locked by a bolt, a stepwise enlarged three-stage stepped hole is formed axially outward at the inner circumferential surface of the end cover 30, the three-stage stepped hole is used for installing the bearing 40, the outer bearing cover 50 and the outer cover 70 respectively, the outer ring of the bearing 40 is sleeved on the inner circumferential surface of the end cover 30 in an interference manner, the inner end surface of the outer ring of the bearing 40 abuts against the step surface, the outer end surface of the outer ring of the bearing 40 abuts against the inner end surface of the outer bearing cover 50, the outer bearing cover 50 is fixed on the step surface of the end cover 30 through bolts, as is clear to a person skilled in the art, bolts used herein should sink inside the outer end surface of the outer bearing cover 50 to avoid the interference of the bolts and the outer seal ring 60, the outer circumferential surface of the outer bearing cover 50 is sleeved on the inner circumferential surface of the end cover 30 in an interference manner, the inner circumferential surface of the outer bearing cover 50 and the outer circumferential surface of the outer seal ring 60 form a labyrinth seal structure, the outer end surface of the inner ring of the bearing 40 abuts against the inner end surface of the outer seal ring 60, the outer seal ring 60 is fixed on the end surface of the rotating shaft 10 through bolts, the outer seal ring 60 is sleeved on the rotating shaft 10 in an interference manner, the outer cover 70 is fixed on the outer end surface of the end cover 30 in an interference manner through bolts, and the outer cover 70 is sleeved on the inner circumferential surface of the end cover 30 in an interference manner; the outer ring of the inner seal ring 20 is circumferentially and uniformly provided with a plurality of first screw holes 21, the end cover 30 is circumferentially and uniformly provided with a plurality of first through holes 31, the outer bearing cover 50 is circumferentially and uniformly provided with a plurality of second through holes 51, the outer seal ring 60 is circumferentially and uniformly provided with a third through hole 61, the first through holes 31 and the second through holes 51 coaxially correspond to each other one by one and can coaxially correspond to the first screw holes 21 one by one through the rotating shaft 10, the third through holes 61 coaxially correspond to the first screw holes 21 one by one, the diameters of the first through holes 31, the second through holes 51 and the third through holes 61 are larger than the diameter of the first screw holes 21, the outer bearing cover 50 is circumferentially and uniformly provided with a plurality of second screw holes 52, the outer seal ring 60 is circumferentially and uniformly provided with fourth through holes 62, the fourth through holes 62 can coaxially correspond to the second screw holes 52 one by one, the diameter of the fourth through holes 62 is larger than the diameter of the second screw holes 52, the fourth through holes 61 correspond to the first through holes 31 when the second through holes 52 correspond to the second through holes 52, the end surface of the rotating shaft 10 is provided with the third screw holes 11, and the center diameter of the outer seal ring 60 is larger than the diameter of the fifth through hole 11. As is clear to those skilled in the art, the bolt fixing of the outer cover 70, the outer bearing cover 50 and the outer seal ring 60 has been provided with screw holes or through holes, and for the convenience of disassembly, the outer cover 70 and the outer bearing cover 50 are also provided with jackscrew holes; the first through hole 31, the second through hole 51, the third through hole 61, the fourth through hole 62, the fifth through hole 63, the first screw hole 21, the second screw hole 52 and the third screw hole 11 are all holes added to the existing mechanism of the present invention.
The following describes the disassembly process of the bearing 40 in detail:
1) Removing the outer sealing ring of the transmission end;
2) Removing the mounting bolts of the outer cover 70, and removing the outer cover 70 through the jackscrew hole on the outer cover 70;
3) Removing the mounting bolts of the outer seal ring 60;
4) The stator and the rotor are separated through a jackscrew hole of the end cover 30, and the rotating shaft is fixed on a tool (the separation of the stator and the rotor is that the rotor, the non-transmission end structure and the bearing inner ring of the transmission end are separated from the machine base);
5) Rotating the end cap 30 so that the third through hole 61 is aligned with the second through hole 51 while the fourth through hole 62 is aligned with the second screw hole 52;
6) Bolts pass through the fourth through holes 62 and are screwed in the second screw holes 52, so that the outer seal ring 60 and the outer bearing cover 50 are fixed into a whole;
7) A pull rod sequentially penetrates through the third through hole 61, the second through hole 51 and the first through hole 31 and then is screwed in the first screw hole 21;
8) The drawing tool penetrates through the fifth through hole 63 or is in threaded connection with the third screw hole 11, and the pull rod is connected with the drawing tool;
9) Pulling out the whole body consisting of the inner seal ring 20, the end cover 30, the bearing 40, the outer bearing cover 50 and the outer seal ring 60 from the rotating shaft 10 by using a pressure pump;
10 Detaching the tool and the inner seal ring 20;
11 Removing the bolts screwed into the second screw holes 52, thereby removing the outer seal ring 60 from the outer bearing cap 50;
12 Mounting bolts of the outer bearing cap 50 are removed and the outer bearing cap 50 is removed through a jack screw hole of the outer bearing cap 50, where the jack screw hole and the second screw hole 52 can be shared;
13 Bearing 40 is removed from end cap 30, and at this time, outer bearing cap 50 is completely exposed, so bearing 40 can be removed easily and without damage by means of a disassembly tool and a pressure pump, and in detail, for more convenient disassembly, the radial thickness of the outer ring of bearing 40 is greater than the radial height of the corresponding step surface of end cap 30.
The following is a detailed description of the reinstallation process:
1) Fixing the rotating shaft on a tool;
2) Thermal jacket inner seal ring 20: when the sleeve is heated, the position relation between the inner seal ring 20 and the mounting hole which is arranged on the end face of the rotating shaft 10 and used for fixing the outer seal ring 60 is observed, and the third through holes 61 can be in one-to-one coaxial correspondence with the first screw holes 21 after the outer seal ring 60 is mounted;
3) And (3) bearing 40 press mounting: pressing the bearing 40 into the stepped hole of the end cover 30 by using a tool and a thrust pump to press the outer ring of the bearing 40;
4) Mounting the outer bearing cap 50: the outer bearing cover 50 is mounted in the stepped hole of the end cover 30 by using bolts, and the second through holes 51 are in one-to-one coaxial correspondence with the first through holes 31;
5) Installing an outer seal ring tool: the difference between the outer seal ring tool and the outer seal ring 61 is that the outer seal ring tool is in clearance fit with the rotating shaft 10 to avoid the rotating shaft 10 from being damaged by pulling during installation, and the inner end face of the outer seal ring tool is tightly pressed on the outer end face of the outer bearing cover 50 to prevent the outer ring and the inner ring of the bearing from generating axial relative displacement during installation to damage the bearing; during specific installation, the outer seal ring tool is tightly pressed on the outer bearing cover 50 by using bolts, so that the outer bearing cover, the outer seal ring and the bearing form a whole;
6) Mounting the end cover 30: screwing a guide rod in the first screw hole 21 of the inner seal ring 20, aligning the first through hole 31 with the guide rod, and then pressing the bearing 40 onto the rotating shaft 10;
7) Assembling a stator and a rotor: pressing the end cover 30 into the base seam allowance and fastening by using bolts;
8) Installing the outer seal ring 60: the outer seal ring tool is disassembled, the third through hole 61 of the outer seal ring 60 is aligned with the guide rod, and then the outer seal ring 60 is fixed on the end face of the rotating shaft 10 through a bolt;
9) Mounting the outer cover 70: fixing the outer cover 70 on the outer end face of the end cover 30 by bolts;
10 Outer seal rings of the drive end are installed to complete the motor assembly.
As a further improvement of the above technical solution, the outer end surface of the inner seal ring 20 is provided with a groove 22 for circumferential positioning, the rotating shaft 10 is provided with a positioning hole 12 corresponding to the groove 22, and the positioning hole 12 is configured with a positioning pin for being inserted therein. After the inner seal ring 20 is shrink-fitted on the rotating shaft 10, the positioning pin is inserted into the positioning hole 12 on the rotating shaft 10 and is placed in the groove 22, and the positioning pin is removed after the inner seal ring 20 is cooled. The operation is simple and convenient, and the assembly precision of the inner seal ring 20 can be ensured.
As a further improvement of the above technical solution, since the first through hole 31 may allow impurities blown from the motor transmission end to pass through the first through hole 31 and then enter the bearing 40 from the gap between the bearing 40 and the outer bearing cover 50, thereby contaminating the bearing 40, a gap is left between the inner end surface of the outer bearing cover 50 and the end cover 30, and the steel sheet 80 is filled in the gap, so that the steel sheet 80 prevents the formation of the air path, thereby effectively preventing the impurities from entering the bearing 40. When the steel sheet paper is disassembled, the steel sheet paper 80 is just punched to be broken.
As a further improvement of the technical scheme, the outer end part of the first screw hole 21 is provided with a counter bore, and the pull rod is guided by the counter bore and then enters the first screw hole 21 during disassembly, so that the assembly convenience is improved, and the assembly efficiency is further improved.
As a further improvement of the above technical solution, the inner ring of the outer seal ring 60 is provided with a plurality of fourth screw holes 64 uniformly distributed along the circumferential direction, the outer seal ring 60 is fixed on the end surface of the rotating shaft 10 by the locking screws inserted into the fourth screw holes 64, the number of the fourth screw holes 64 is equal to the diameter of the second screw hole 52, and the number of the fourth screw holes 64 is equal to the number of the second screw holes 52, when the outer seal ring 60 is disassembled, the locking screws disassembled from the fourth screw holes 64 can be screwed into the second screw holes 52 again to fixedly connect the outer seal ring 60 and the outer bearing cover 50, so that the operation is more convenient.
As a further improvement of the above technical solution, an internal locking stop washer is provided between the head of the locking screw and the outer seal ring 60. The internal locking type stop washer has the advantages that the structure disclosed in the patent with the publication number of CN111749971A and the invention name of 'one internal locking type stop washer' is adopted, the requirement of a user on increasing a grounding device can be met under the condition that the structure of a motor main body is not changed, and reliable anti-loosening is realized.
Preferably, the diameters of the first through hole 31, the second through hole 51 and the third through hole 61 are all equal, and the diameters of the first screw hole 21 and the second screw hole 52 are equal, so that the processing is convenient.
Specifically, the first through hole 31, the second through hole 51, the third through hole 61, and the fourth through hole 62 are all holes of Φ 10, the first screw hole 21 and the second screw hole 52 are all holes of M8, the third screw hole 11 is a hole of M20, and the fifth through hole 63 is a hole of Φ 28.
Specifically, three first screw holes 21, three second screw holes 52, three first through holes 31, three second through holes 51, three third through holes 61, and three fourth through holes 62 are the best solution, two of which cannot determine a plane, and four of which are too many.
In detail, in order to improve the fault tolerance of the first screw holes 21 of the inner seal ring 20, the number of the inner seal ring 20 may be set to several times, for example, 3 first screw holes 21 are required for actual disassembly, six or 9 or 12 first screw holes 21 may be provided, so that even if three first screw holes 21 are damaged, other first screw holes 21 may be used.
It should be noted that the above-mentioned components are not limited to the non-transmission end, and if the components are the transmission end, the phrase "8230;" transmission end "is added.
The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (9)
1. The utility model provides a non-transmission end bearing mounting structure of traction motor, includes pivot (10), the tip that is located non-transmission end of pivot (10) outwards installs interior seal ring (20), end cover (30), bearing (40), outer bearing cap (50), outer seal ring (60) and enclosing cover (70), its characterized in that along its axial in proper order: a plurality of first screw holes (21) are uniformly distributed on the outer ring of the inner seal ring (20) along the circumferential direction, a plurality of first through holes (31) are uniformly distributed on the end cover (30) along the circumferential direction, a plurality of second through holes (51) are uniformly distributed on the outer bearing cover (50) along the circumferential direction, third through holes (61) are uniformly distributed on the outer seal ring (60) along the circumferential direction, the first through holes (31) and the second through holes (51) are coaxially corresponding one by one and can be coaxially corresponding to the first screw holes (21) one by one through a rotating shaft (10), the third through holes (61) are coaxially corresponding to the first screw holes (21) one by one, the diameters of the first through holes (31), the second through holes (51) and the third through holes (61) are all larger than the diameter of the first screw holes (21), a plurality of second screw holes (52) are uniformly distributed on the outer bearing cover (50) along the circumferential direction, fourth through holes (62) are uniformly distributed on the outer seal ring (60) along the circumferential direction, can be through rotatory pivot (10) fourth through hole (62) with second screw (52) one-to-one coaxial correspondence, the diameter of fourth through hole (62) is greater than second screw (52) diameter, third through hole (61) corresponds with first through-hole (31) when fourth through hole (62) corresponds with second screw (52), the terminal surface of pivot (10) is equipped with third screw (11), the center of outer seal ring (60) is equipped with fifth through-hole (63) that the diameter is greater than third screw (11).
2. The non-transmission end bearing mounting structure of a traction motor according to claim 1, wherein: the outer end face of the inner seal ring (20) is provided with a groove (22) for circumferential positioning, the rotating shaft (10) is provided with a positioning hole (12) corresponding to the groove (22), and the positioning hole (12) is provided with a positioning pin inserted into the positioning hole.
3. The non-transmission end bearing mounting structure of a traction motor according to claim 1, wherein: a gap is reserved between the inner end face of the outer bearing cover (50) and the end cover (30), and steel plate paper (80) is padded in the gap.
4. A traction motor non-drive end bearing mounting structure according to any one of claims 1 to 3, wherein: the outer end part of the first screw hole (21) is provided with a counter bore.
5. The traction motor non-drive end bearing mounting structure according to claim 4, wherein: the inner ring of the outer seal ring (60) is provided with a plurality of fourth screw holes (64) which are uniformly distributed along the circumferential direction, the outer seal ring (60) is fixed on the end face of the rotating shaft (10) through locking screws which are inserted into the fourth screw holes (64), and the number of the fourth screw holes (64) is equal to the diameter of the second screw holes (52) and is equal to the number of the second screw holes.
6. The non-transmission end bearing mounting structure of a traction motor according to claim 5, wherein: an internal locking type stop gasket is arranged between the head of the locking screw and the outer seal ring (60).
7. The traction motor non-drive end bearing mounting structure according to claim 4, wherein: the diameters of the first through hole (31), the second through hole (51) and the third through hole (61) are all equal, and the diameters of the first screw hole (21) and the second screw hole (52) are equal.
8. The traction motor non-drive end bearing mounting structure according to claim 6, wherein: the first through hole (31), the second through hole (51), the third through hole (61) and the fourth through hole (62) are all phi 10 holes, the first screw hole (21) and the second screw hole (52) are all M8 holes, the third screw hole (11) is M20 hole, and the fifth through hole (63) is phi 28 hole.
9. The non-transmission end bearing mounting structure of a traction motor according to claim 8, wherein: the number of the first screw holes (21), the number of the second screw holes (52), the number of the first through holes (31), the number of the second through holes (51), the number of the third through holes (61) and the number of the fourth through holes (62) are all three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565064.8A CN112713694B (en) | 2020-12-25 | 2020-12-25 | Non-transmission end bearing mounting structure of traction motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011565064.8A CN112713694B (en) | 2020-12-25 | 2020-12-25 | Non-transmission end bearing mounting structure of traction motor |
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| CN112713694A CN112713694A (en) | 2021-04-27 |
| CN112713694B true CN112713694B (en) | 2023-04-04 |
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| CN114649892B (en) * | 2022-05-23 | 2022-08-16 | 山西省机电设计研究院有限公司 | Motor with bearing disassembly assisting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088914A (en) * | 1973-07-20 | 1978-05-09 | Canon Kabushiki Kaisha | Electric motor |
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| CN203691104U (en) * | 2013-11-25 | 2014-07-02 | 南通国盛机电集团有限公司 | Motor base structure convenient to dismount bearing |
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| CN112713694A (en) | 2021-04-27 |
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