CN209881571U - Motor rotor axial positioning structure and windscreen wiper motor - Google Patents
Motor rotor axial positioning structure and windscreen wiper motor Download PDFInfo
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- CN209881571U CN209881571U CN201920979322.3U CN201920979322U CN209881571U CN 209881571 U CN209881571 U CN 209881571U CN 201920979322 U CN201920979322 U CN 201920979322U CN 209881571 U CN209881571 U CN 209881571U
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Abstract
The utility model discloses electric motor rotor axial positioning structure, windscreen wiper motor and installation method belongs to the electrical equipment field, and the purpose improves electric motor rotor axial fixity's reliability. The turbine stator comprises a stator shell, a turbine reduction gearbox, an armature shaft and a disk-shaped constant force spring, wherein the disk-shaped constant force spring is arranged in a bearing chamber of the stator shell, the large end of the disk-shaped constant force spring presses the end face of the bearing chamber of the stator shell, the outer ring of a first bearing is pressed by the disk-shaped constant force spring, and the inner ring of the first bearing is pressed by a first clamping collar; or the disc-shaped constant force spring is arranged in a bearing chamber of the turbine reduction gearbox, the large end of the disc-shaped constant force spring presses the end face of the bearing chamber of the turbine reduction gearbox, the outer ring of the second bearing is pressed by the disc-shaped constant force spring, and the inner ring of the second bearing is pressed by the second clamping collar. The utility model can completely eliminate the manufacturing and assembling dimension error, and has low requirement on the dimension precision of parts; the rotor is axially fixed and reliable, and has no play completely; the structure is extremely simple, the manufacturability is good, and the cost is saved.
Description
Technical Field
The utility model belongs to the electrical equipment field specifically is electric motor rotor axial positioning structure and windscreen wiper motor.
Background
In recent years, when new vehicle models are released, intellectualization is taken as one of the most important selling points by various automobile manufacturers, and the intelligent windscreen wiper is also a development trend in the future, and the intelligent windscreen wiper is equipped in some high-grade vehicle models at present. Compared with an intelligent wiper, the traditional wiper has the most remarkable characteristic that a rotor of a traditional wiper motor rotates in a single direction, and the rotor of the intelligent wiper motor rotates in a forward direction and a reverse direction, so that the forward and reverse axial movement of the rotor is eliminated, and the noise and the abrasion caused by the forward and reverse movement in the rotation process of the rotor are avoided.
The patent application with the name of CN201820901076.5 for motor rotor axial positioning structure and wiper motor discloses a motor rotor axial positioning structure. This electric motor rotor axial positioning structure presses to the second bearing outer lane through the retaining ring, and first bearing outer lane is pressed to stator housing bearing chamber terminal surface, presss from both sides the armature shaft through retaining ring and stator housing from both ends tightly to eliminate the axial clearance, avoid the armature shaft drunkenness.
Although the axial positioning structure of the motor rotor has certain effects on eliminating the gap and preventing the armature shaft from moving, the structure has the advantages that the bearing chamber is a through hole, the retainer ring is assembled and pressed on the opposite side of the bearing installation direction, and the clearance can not be completely pressed theoretically, namely the gap can not be completely eliminated because of the rebound of the retainer ring; the outer ring of the retainer ring is extruded and deformed by the inner wall of the bearing chamber, the retainer ring is fixed by interference magnitude, the retainer ring bears axial channeling force of the rotor for a long time, and the requirements on the size, hardness, elasticity and the like of the retainer ring are extremely high. The retaining ring is unevenly stressed in the circumferential direction and is easy to skew, fatigue failure is easy to occur due to uneven acting force for a long time, the retaining ring can fall off under the action of axial float force, the problem that a rotor armature shaft is blocked or a gear is damaged occurs, the motor can not work due to complete failure, and the consequence is serious.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric motor rotor axial positioning structure to eliminate the clearance that dimensional error caused, improve electric motor rotor axial fixity's reliability.
The utility model adopts the technical proposal that: the motor rotor axial positioning structure comprises a stator shell, a turbine reduction gearbox and an armature shaft, wherein a first bearing is installed in a bearing chamber of the stator shell, and a second bearing is installed in a bearing chamber of the turbine reduction gearbox; the armature shaft comprises a tail end part extending into the stator shell, a front end part extending into the turbine reduction gearbox and a middle part positioned between the tail end part and the front end part; a first clamping collar is arranged at the tail end part of the armature shaft, a second clamping collar is arranged at the middle part of the armature shaft, and the first clamping collar and the second clamping collar are positioned between the first bearing and the second bearing; also comprises a disk-shaped constant force spring,
the disc-shaped constant force spring is arranged in a bearing chamber of the stator shell, the disc-shaped constant force spring and the first clamping collar are separated from each other at two sides of the first bearing, one end of the disc-shaped constant force spring presses the end face of the bearing chamber of the stator shell, the other end of the disc-shaped constant force spring presses the outer ring of the first bearing, and the first clamping collar presses the inner ring of the first bearing;
or the disc-shaped constant force spring is arranged in a bearing chamber of the turbine reduction gearbox, the disc-shaped constant force spring and the second clamping collar are respectively arranged on two sides of the second bearing, one end of the disc-shaped constant force spring presses the end face of the bearing chamber of the turbine reduction gearbox, the other end of the disc-shaped constant force spring presses the outer ring of the second bearing, and the second clamping collar presses the inner ring of the second bearing.
Furthermore, the disk-shaped constant force springs are arranged in an involutory mode. The disk-shaped constant force spring keeps constant elasticity in a certain working stroke, and axial clearance can be eliminated.
Furthermore, the constant elasticity of the disc-shaped constant force spring is between the axial running force of the rotor and the rated bearing force of the first bearing or the second bearing, so that the axial running force of the rotor can be counteracted, and the rolling bearing cannot be damaged.
Further, dish-shaped constant force spring includes main aspects, tip and connects the spring body of main aspects and tip, be provided with the groove of a plurality of curvilinear curves on the spring body between main aspects and the tip, the profile of groove is the confined annular, and a plurality of grooves are circumference form evenly distributed on the spring body and will split into a plurality of curvilinear curves spring body.
The wiper motor comprises a rotor, a stator and a motor rotor axial positioning structure; the rotor and the stator are arranged in a motor cavity formed by the turbine reduction box and the stator shell; the armature shaft is matched with a worm wheel arranged in the turbine reduction box.
The utility model has the advantages that: the utility model discloses dish-shaped constant force spring has great working stroke, can eliminate manufacturing and assembly size error completely, and the dimensional requirement to spare part is low. The motor rotor axial positioning structure realizes the axial positioning of the rotor only by relying on a disk-shaped constant force spring, a first clamping collar, a second clamping collar and the like, has few parts and simple structure, is beneficial to saving the cost, is convenient to assemble, and has good assembly manufacturability; the motor is short in length and small in weight, and space is saved.
Drawings
FIG. 1 is a view of a motor structure;
FIG. 2 is a stator assembly structure view;
FIG. 3 is a schematic view of a disk constant force spring;
FIG. 4 is a schematic diagram of the combined use of disk-shaped constant force springs.
In the figure, a stator shell 1, a turbine reduction gearbox 2, an armature shaft 3, a first bearing 4, a second bearing 5, a first clamping collar 6, a second clamping collar 7, a disk-shaped constant force spring 8, a large end 81, a small end 82, a spring body 83, a groove 84, a curved spring body 85 and a worm wheel 9 are arranged.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1 and 2, the axial positioning structure of the motor rotor comprises a stator housing 1, a turbine reduction gearbox 2 and an armature shaft 3, wherein a first bearing 4 is installed in a bearing chamber of the stator housing 1, and a second bearing 5 is installed in a bearing chamber of the turbine reduction gearbox 2; the armature shaft 3 comprises a tail end part extending into the stator shell 1, a front end part extending into the turbine reduction gearbox 2 and a middle part positioned between the tail end part and the front end part; a first clamping collar 6 is arranged at the end part of the armature shaft 3, a second clamping collar 7 is arranged at the middle part, and the first clamping collar 6 and the second clamping collar 7 are positioned between the first bearing 4 and the second bearing 5; also comprises a disk-shaped constant force spring 8,
the disc-shaped constant force spring 8 is arranged in a bearing chamber of the stator housing 1, the disc-shaped constant force spring 8 and the first clamping collar 6 are respectively arranged on two sides of the first bearing 4, one end of the disc-shaped constant force spring 8 presses the end face of the bearing chamber of the stator housing 1, the other end of the disc-shaped constant force spring presses the outer ring of the first bearing 4, and the first clamping collar 6 presses the inner ring of the first bearing 4;
or the disk-shaped constant force spring 8 is arranged in the bearing chamber of the turbine reduction gearbox 2, the disk-shaped constant force spring 8 and the second clamping collar 7 are respectively arranged on two sides of the second bearing 5, one end of the disk-shaped constant force spring 8 compresses the end face of the bearing chamber of the turbine reduction gearbox 2, the other end compresses the outer ring of the second bearing 5, and the second clamping collar 7 compresses the inner ring of the second bearing 5.
The utility model discloses well dish-shaped constant force spring 8 can keep invariable elasticity in certain working stroke, provides great and basically invariable elasticity through dish-shaped constant force spring 8 with 3 axial positioning of armature shaft for 3 axial fixity of armature shaft are reliable, do not have the drunkenness completely, and it can last to carry out axial fixity to armature shaft 3 for a long time. One end of the disk-shaped constant force spring 8 compresses the end face of the bearing chamber, so that the problem that the disk-shaped constant force spring 8 falls off cannot occur. And because it relies on a large and constant spring force to effect the fixing of the armature shaft 3, it can completely eliminate manufacturing and assembly dimensional errors, with low dimensional requirements for the components. In addition, the axial positioning structure of the motor rotor only depends on the disk-shaped constant force spring 8, the first clamping collar 6, the second clamping collar 7 and the like to realize the axial positioning of the rotor, and has the advantages of few parts, simple structure, short length of the motor and light weight of the motor.
The number of the disk-shaped constant force springs 8 is multiple, and the disk-shaped constant force springs 8 are arranged in an involutory mode. The disc-shaped constant force springs 8 can be arranged in two, three or more, and the larger the number of the disc-shaped constant force springs 8 is, the longer the disc-shaped constant force springs are, the larger the occupied space is, and the more complicated the assembly is. In the embodiment shown in fig. 1, 2 or 4, two of the belleville constant force springs 8 are preferred.
In order to make the elastic force provided by the disk-shaped constant force spring 8 can counteract the forward and backward movement force in the rotation process of the rotor without causing bearing damage, preferably, the constant elastic force of the disk-shaped constant force spring 8 is between the axial movement force of the rotor and the rated bearing force of the first bearing 4 or the second bearing 5.
Preferably, as shown in fig. 3, the disc-shaped constant force spring 8 includes a large end 81, a small end 82 and a spring body 83 connecting the large end 81 and the small end 82, a plurality of curved grooves 84 are disposed on the spring body 83 between the large end 81 and the small end 82, the contour of the grooves 84 is a closed ring shape, and the plurality of grooves 84 are uniformly distributed on the spring body 83 in a circumferential shape and divide the spring body 83 into a plurality of curved spring bodies 85.
The groove 84 of the disk-shaped constant force spring 8 can be in a curved shape such as an arc shape, an S shape or a Z shape, the groove 84 and the spring body 83 have a certain radial included angle,
when the curved spring body 85 between two adjacent slots 84 is similar to the slots 84 in shape and is curved, and is under pressure, the curved spring body 85 not only generates compression deformation, but also rotates around the central line under the action of pressure, and the curved spring body 85 generates tensile deformation and becomes long, so that the arm length dimension of the stress point is effectively increased, the increase of the elastic force is avoided, and the elastic force is basically kept constant. And the outline of the groove 84 is a closed ring shape, and the two ends of the groove do not penetrate through the large end 81 and the small end 82, so that when the large end 81 or the small end 82 is subjected to pressure, the pressure can be transmitted to all the curve-shaped spring bodies 85, and when the pressure is uneven, the groove has certain capacity of automatically adjusting pressure balance, ensures that the deformation of each curve-shaped spring body 85 is consistent, and can prolong the service life.
The wiper motor comprises a rotor, a stator and a motor rotor axial positioning structure; the rotor and the stator are arranged in a motor cavity formed by the turbine reduction box 2 and the stator shell 1; the armature shaft 3 is matched with a worm wheel 9 arranged in the turbine reduction box 2.
The wiper motor has the advantages of few parts, simple structure, elimination of gaps caused by dimensional errors of the parts, reliable axial fixation of the rotor and no axial movement of the rotor, thereby avoiding noise and abrasion caused by the front and back movement of the rotor in the rotation process.
The wiper motor mounting method comprises the steps of firstly, assembling a second bearing 5 in a bearing chamber of a turbine reduction gearbox 2, and then assembling an armature shaft 3 in the turbine reduction gearbox 2 through the second bearing 5; step two, the first bearing 4 and the disk-shaped constant force spring 8 are assembled in a bearing chamber of the stator housing 1, and a riveting point is arranged at the mouth part of the bearing chamber of the stator housing 1, so that the first bearing 4 and the disk-shaped constant force spring 8 are prevented from falling off from the bearing chamber during subsequent assembly, and the operation is easy; and step three, assembling the stator on the turbine reduction gearbox 2, enabling the armature shaft 3 to penetrate through the first bearing 4, enabling the first clamping collar 6 to tightly press the inner ring of the first bearing 4, and enabling the second clamping collar 7 to tightly press the inner ring of the second bearing 5. The wiper motor is simple in installation method, easy to operate and short in motor assembling time.
Claims (5)
1. The motor rotor axial positioning structure comprises a stator shell (1), a turbine reduction gearbox (2) and an armature shaft (3), wherein a first bearing (4) is installed in a bearing chamber of the stator shell (1), and a second bearing (5) is installed in a bearing chamber of the turbine reduction gearbox (2); the armature shaft (3) comprises a tail end part extending into the stator shell (1), a front end part extending into the turbine reduction gearbox (2) and a middle part positioned between the tail end part and the front end part; a first clamping collar (6) is arranged at the tail end part of the armature shaft (3), a second clamping collar (7) is arranged at the middle part, and the first clamping collar (6) and the second clamping collar (7) are positioned between the first bearing (4) and the second bearing (5); the method is characterized in that: also comprises a disk-shaped constant force spring (8),
the disc-shaped constant force spring (8) is arranged in a bearing chamber of the stator shell (1), the disc-shaped constant force spring (8) and the first clamping collar (6) are separated from each other at two sides of the first bearing (4), one end of the disc-shaped constant force spring (8) presses the end face of the bearing chamber of the stator shell (1), the other end of the disc-shaped constant force spring presses the outer ring of the first bearing (4), and the first clamping collar (6) presses the inner ring of the first bearing (4);
or the disc-shaped constant force spring (8) is arranged in a bearing chamber of the turbine reduction gearbox (2), the disc-shaped constant force spring (8) and the second clamping collar (7) are respectively arranged at two sides of the second bearing (5), one end of the disc-shaped constant force spring (8) compresses the end face of the bearing chamber of the turbine reduction gearbox (2), the other end of the disc-shaped constant force spring compresses the outer ring of the second bearing (5), and the second clamping collar (7) compresses the inner ring of the second bearing (5).
2. The electric machine rotor axial positioning structure of claim 1, wherein: the disc-shaped constant force springs (8) are multiple, and the disc-shaped constant force springs (8) are arranged in an involutory mode.
3. The electric machine rotor axial positioning structure of claim 1, wherein: the constant elasticity of the disk-shaped constant force spring (8) is between the axial running force of the rotor and the rated bearing force of the first bearing (4) or the second bearing (5).
4. An electric motor rotor axial positioning structure as set forth in any of claims 1-3, characterized in that: dish-shaped constant force spring (8) are including main aspects (81), tip (82) and connect spring body (83) of main aspects (81) and tip (82), be provided with groove (84) of a plurality of curvilinear curves on spring body (83) between main aspects (81) and tip (82), the profile of groove (84) is the confined annular, and a plurality of grooves (84) are circumference form evenly distributed and cut apart into a plurality of curvilinear curves spring body (85) with spring body (83).
5. Windscreen wiper motor, including rotor and stator, its characterized in that: the motor rotor axial positioning structure of claim 4; the rotor and the stator are arranged in a motor cavity formed by the turbine reduction box (2) and the stator shell (1); the armature shaft (3) is matched with a worm wheel (9) arranged in the turbine reduction gearbox (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979322.3U CN209881571U (en) | 2019-06-26 | 2019-06-26 | Motor rotor axial positioning structure and windscreen wiper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920979322.3U CN209881571U (en) | 2019-06-26 | 2019-06-26 | Motor rotor axial positioning structure and windscreen wiper motor |
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| Publication Number | Publication Date |
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| CN209881571U true CN209881571U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920979322.3U Active CN209881571U (en) | 2019-06-26 | 2019-06-26 | Motor rotor axial positioning structure and windscreen wiper motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417177A (en) * | 2019-06-26 | 2019-11-05 | 成都华川电装有限责任公司 | Rotor axial direction location structure, rain shaving electrical machine and installation method |
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2019
- 2019-06-26 CN CN201920979322.3U patent/CN209881571U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417177A (en) * | 2019-06-26 | 2019-11-05 | 成都华川电装有限责任公司 | Rotor axial direction location structure, rain shaving electrical machine and installation method |
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