CN210578114U

CN210578114U - Epaxial suit part fixed knot constructs and windscreen wiper motor rotor

Info

Publication number: CN210578114U
Application number: CN201921542635.9U
Authority: CN
Inventors: 杜树浩; 张春; 朱攀; 黄柯
Original assignee: Chengdu Huachuan Electric Parts Co Ltd
Current assignee: Chengdu Huachuan Electric Parts Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-05-19
Anticipated expiration: 2029-09-17

Abstract

The utility model discloses an epaxial suit part fixed knot constructs and windscreen wiper electric motor rotor relates to part fixed knot and constructs the field, provides a simple structure's epaxial suit part fixed knot and constructs. The on-axis suit part fixed knot constructs including installation axle and suit at the epaxial suit part of installation, and the epaxial at least one side of suit part of installation all has the extrusion deformation structure, and the extrusion deformation structure includes extrusion groove, extrusion lobe and extrusion diameter increase portion, extrusion diameter increase portion and suit part interference fit, extrusion lobe restriction suit part axial displacement. The wiper motor rotor comprises an armature shaft and two bearings, the armature shaft comprises a polished rod section and a worm section, the two bearings are sleeved on the polished rod section, an extrusion deformation structure is arranged on one polished rod section between the two bearings and close to the bearings, the extrusion diameter increasing part is in interference fit with the bearings, and the extrusion bulge limits axial movement of the bearings.

Description

Epaxial suit part fixed knot constructs and windscreen wiper motor rotor

Technical Field

The utility model relates to a part fixed knot constructs the field, especially relates to an epaxial suit part fixed knot constructs and windscreen wiper electric motor rotor.

Background

Shaft parts are common parts in machinery, and sleeved parts, such as gears, bearings, shaft sleeves and the like, are usually sleeved on a shaft. In order to avoid axial movement of the nested part, the nested part needs to be axially fixed. The axial fixing mode is various, for example, as shown in fig. 1, the nut presses the sleeved part on the shaft shoulder; grooves can be processed on the shaft, and various check rings can be arranged for fixation. Above-mentioned epaxial suit part fixed mode is owing to need set up the shaft shoulder and connect the nut on the axle, perhaps process the retaining ring in the slot on the axle, and the structure is comparatively complicated.

Take wiper motor produced by applicant as an example. As shown in fig. 3 and 4, in the conventional wiper motor, the rotor structure is a double rolling bearing structure, and the rotor is assembled and positioned by matching two C-shaped collars, a spring, a stator and a housing which are fixed on an armature shaft. Due to the fact that the matching size is large, the axial clearance of the rotor is not easy to control, and the requirements on machining technology and assembling technology are high. And because of the structure reason (dextrorotation or levogyration) of the spring, the motor can only realize rotating towards one direction when working. Meanwhile, when the motor operates, the rotor has thrust along the axial direction of the armature shaft, and the rotor can move if not controlled. Generally, two methods are used for control, namely, a stop block structure is added at the tail end of an armature shaft; and secondly, the shell is injected at the tail end of the armature shaft. But either the process is complicated or the sound is not good and poor control wears the armature shaft. In addition, in the use structure, the elasticity of the spring is not easy to select, the bearing is easy to damage due to overlarge elasticity, and the play occurs due to too small elasticity.

The intelligent wiper motor in the new era has the advantages that the wiping speed is automatically controlled by the chip according to the rainfall, so that the positive and negative rotation of the motor is required, and the requirements on the aspects of reducing the play, increasing the motor efficiency, reducing the weight and the like are met. Therefore, it is very important to develop a rotor structure which has simple structure and reliable performance and can realize the forward and reverse rotation of the motor.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the fixing structure for the parts sleeved on the shaft is simple in structure.

The technical scheme adopted for solving the problems is as follows: the on-axis suit part fixed knot constructs including installation axle and suit at the epaxial suit part of installation, and the epaxial at least one side of suit part of installation all has the extrusion deformation structure, and the extrusion deformation structure includes extrusion groove, extrusion lobe and extrusion diameter increase portion, extrusion diameter increase portion and suit part interference fit, extrusion lobe restriction suit part axial displacement.

Further, the method comprises the following steps: the installation epaxial both sides at the suit part all have the extrusion deformation structure.

The utility model discloses another technical problem who solves is: the wiper motor rotor is simple in structure.

The technical scheme adopted for solving the problems is as follows: the wiper motor rotor comprises an armature shaft and two bearings, the armature shaft comprises a polished rod section and a worm section, the two bearings are arranged at intervals and sleeved on the polished rod section, an extrusion deformation structure is arranged on the polished rod section between the two bearings and close to the bearings, the extrusion deformation structure comprises an extrusion groove, an extrusion convex part and an extrusion diameter increasing part, the extrusion diameter increasing part is in interference fit with the bearings, and the extrusion convex part limits axial movement of the bearings.

Further, the method comprises the following steps: the commutator, the end plate and the iron core component with coils are sleeved between the two bearings on the polished rod section, and the commutator, the end plate and the iron core component are sequentially arranged along the direction from the worm section to the polished rod section.

Further, the method comprises the following steps: the coil is made of polyester enameled round copper wire.

The utility model has the advantages that: 1. the shaft shoulder or the groove arranged on the mounting shaft for positioning the sleeved part is omitted, the connecting nut or the check ring is also omitted, and the structure of the mounting shaft is simpler.

2. When the shaft sleeved part fixing structure is applied to the wiper motor rotor, the bearing can be fixed on the armature shaft, and the structure of the wiper motor rotor is simpler. Existing structure for fixed rotor, needs to have a plurality of spare parts assembly cooperation departments for the degree of difficulty of parts machining and assembly is great, still has very big accumulative tolerance, and the utility model discloses reduce the assembly cooperation, can reduce the assembly tolerance to the minimum, can reduce the drunkenness of rotor. And because a spring structure is cancelled, the motor can realize positive and negative rotation. In addition, because the rotor structure is simplified, the material cost ratio is reduced, the assembly procedures are reduced, and the play is effectively controlled, so that the tail part of the armature shaft can be suspended, the abrasion of the armature shaft is reduced, the motor efficiency is increased to a certain extent, the service life of the motor is prolonged, and the motor is worth being popularized vigorously.

Drawings

FIG. 1 is a view of a prior art fixed structure of a sleeved component on a shaft;

FIG. 2 is a view of the fixing structure of the parts sleeved on the shaft according to the present invention;

FIG. 3 is a view of a prior art wiper motor rotor;

FIG. 4 is a cross-sectional view of a prior art wiper motor rotor;

FIG. 5 is a structural view of the wiper motor rotor of the present invention;

fig. 6 is a cross-sectional view of the wiper motor rotor of the present invention;

FIG. 7 is an enlarged view of the bearing and armature shaft connection;

FIG. 8 is a diagram of a method of forming an extruded deformed structure;

labeled as: the device comprises a mounting shaft 1, a sleeved part 2, an extrusion deformation structure 3, an extrusion groove 3-1, an extrusion convex part 3-2, an extrusion diameter increasing part 3-3, an armature shaft 4, a polished rod section 4-1, a worm section 4-2, a bearing 5, a C-shaped clamping ring 6, a spring 7, a commutator 8, an end plate 9, an iron core assembly 10, a coil 11 and a forming device 12.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 2: the fixing structure for the sleeved parts on the shaft comprises a mounting shaft 1 and sleeved parts 2 sleeved on the mounting shaft 1, wherein extrusion deformation structures 3 are arranged on at least one side of the sleeved parts 2 on the mounting shaft 1, each extrusion deformation structure 3 comprises an extrusion groove 3-1, an extrusion bulge part 3-2 and an extrusion diameter increasing part 3-3, the extrusion diameter increasing parts 3-3 are in interference fit with the sleeved parts 2, and the extrusion bulge parts 3-2 limit the sleeved parts 2 to move axially.

The mounting shaft 1 can be provided with extrusion deformation structures 3 on both sides of the sleeved part 2, or can be provided with extrusion deformation structures 3 only on one side of the sleeved part 2.

The fixing structure of the parts sleeved on the shaft is applied to the wiper motor rotor, namely, as shown in fig. 5 to 7: the wiper motor rotor comprises an armature shaft 4 and two bearings 5, the armature shaft 4 comprises a polished rod section 4-1 and a worm section 4-2, the two bearings 5 are arranged at intervals and sleeved on the polished rod section 4-1, an extrusion deformation structure 3 is arranged on one polished rod section 4-1 between the two bearings 5 and close to the bearing 5, the extrusion deformation structure 3 comprises an extrusion groove 3-1, an extrusion convex part 3-2 and an extrusion diameter increasing part 3-3, the extrusion diameter increasing part 3-3 is in interference fit with the bearings 5, and the extrusion convex part 3-2 limits the axial movement of the bearing 5.

The other structures of the wiper motor rotor are the same as the prior art, namely a commutator 8, an end plate 9 and an iron core assembly 10 with a coil 11 are sleeved on the polished rod section 4-1 between the two bearings 5, and the commutator 8, the end plate 9 and the iron core assembly 10 are sequentially arranged along the direction from the worm section 4-2 to the polished rod section 4-1. The coil 11 is preferably made of polyester enameled round copper wire.

Taking the wiper motor rotor as an example, the forming method of the extrusion deformation structure 3 is shown in fig. 8, the forming device 12 and the armature shaft 4 rotate and approach slowly, and the forming device 12 extrudes the armature shaft 4 to form an annular extrusion groove 3-1. The extruded portion of the material forms an extruded boss 3-2, and the extrusion also affects the armature shaft 4 in the vicinity of the extrusion portion to increase the diameter to form an extruded diameter-increased portion 3-3. In order to avoid the bearing 5 moving due to the compression, another pair of bearings of the bearing 5 should be supported and positioned.

Claims

1. Epaxial suit part fixed knot constructs, including installation axle (1) and suit part (2) on installation axle (1), its characterized in that: the installation shaft (1) is provided with an extrusion deformation structure (3) on at least one side of the sleeved part (2), the extrusion deformation structure (3) comprises an extrusion groove (3-1), an extrusion bulge part (3-2) and an extrusion diameter increasing part (3-3), the extrusion diameter increasing part (3-3) is in interference fit with the sleeved part (2), and the extrusion bulge part (3-2) limits the axial movement of the sleeved part (2).

2. The axle-mounted parts fixing structure according to claim 1, wherein: the two sides of the sleeved part (2) on the mounting shaft (1) are provided with extrusion deformation structures (3).

3. Windscreen wiper motor rotor, including armature shaft (4) and two bearings (5), armature shaft (4) include polished rod section (4-1) and worm section (4-2), and two bearings (5) interval set up and suit on polished rod section (4-1), its characterized in that: an extrusion deformation structure (3) is arranged on a polished rod section (4-1) between the two bearings (5) and close to the bearings (5), the extrusion deformation structure (3) comprises an extrusion groove (3-1), an extrusion bulge (3-2) and an extrusion diameter increasing part (3-3), the extrusion diameter increasing part (3-3) is in interference fit with the bearings (5), and the extrusion bulge (3-2) limits the axial movement of the bearings (5).

4. The wiper motor rotor of claim 3 wherein: the commutator (8), the end plate (9) and the iron core assembly (10) with the coil (11) are sleeved on the polish rod section (4-1) between the two bearings (5), and the commutator (8), the end plate (9) and the iron core assembly (10) are sequentially arranged along the direction from the worm section (4-2) to the polish rod section (4-1).

5. The wiper motor rotor of claim 4 wherein: the coil (11) is made of polyester enameled round copper wire.