CN218733586U

CN218733586U - Angular contact bearing fastening structure for hollow shaft motor

Info

Publication number: CN218733586U
Application number: CN202222991064.5U
Authority: CN
Inventors: 任红亮
Original assignee: Nidec Kaiyu Auto Electric Jiangsu Co Ltd
Current assignee: Nedco Kaiyu Automotive Appliances Jiangsu Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-24
Anticipated expiration: 2032-11-10

Abstract

The utility model discloses an angular contact bearing fastening structure for a hollow shaft motor, which comprises a casing, an angular contact bearing and a bearing clamping ring, wherein the end part of the casing is sequentially provided with a coaxial output hole, a bearing chamber and a clamping ring assembling hole from outside to inside; the diameter of the output hole is smaller than that of the bearing chamber, a step surface is formed between the output hole and the bearing chamber, the angular contact bearing is axially assembled in the bearing chamber, an outer ring of the angular contact bearing is tightly attached to the step surface, the bearing pressing ring is axially riveted in the pressing ring assembling hole and tightly presses the end face of the outer ring of the angular contact bearing, and a plurality of riveting points are uniformly distributed and formed on the edge of the end face of the bearing pressing ring and the edge of the end face of the pressing ring assembling hole. The utility model discloses simple workable, the cost is lower, adopts the bearing clamping ring to hug closely angular contact bearing to the riveting forms reliable, effectual fastening of axial to angular contact bearing in the mounting hole.

Description

Angular contact bearing fastening structure for hollow shaft motor

Technical Field

The utility model relates to the technical field of motors, especially, relate to an angular contact bearing fastening structure for hollow shaft motor.

Background

In the field of new energy vehicles, innovation of a brake system is always an important factor for examining the technology of suppliers. In the aspect of application of a brake system, the screw rod hollow shaft motor generally has higher requirements on bearings due to larger axial force, and an angular contact bearing (also called as a 4P bearing) is generally selected, so that the axial fastening mode of the 4P bearing in a bearing chamber of a motor shell becomes a technical overcoming difficulty.

Most of screw rod hollow shaft motor 4P bearings generally adopt the hollow nut structure in the present industry, screw up and axial compresses tightly fixed 4P bearing inner race through the hollow nut and accomplish axial fastening. Although the structure mode is simple to operate, the processing cost of the hollow nut is high, and the 4P bearing can act on the hollow nut for a long time in the vibration and operation processes of the motor, so that the hollow nut is easy to loosen, and the problems of axial displacement of the bearing, axial fastening failure of the bearing and the like are caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that, overcome prior art not enough, provide a hollow shaft is angular contact bearing fastening structure for motor, it is simple workable, and the cost is lower, adopts the bearing clamping ring to hug closely angular contact bearing to the riveting forms reliable, effectual fastening of axial in the mounting hole to angular contact bearing.

In order to solve the technical problem, the technical scheme of the utility model is that:

an angular contact bearing fastening structure for a hollow shaft motor comprises a shell, an angular contact bearing and a bearing pressing ring, wherein a coaxial output hole, a bearing chamber and a pressing ring assembling hole are sequentially formed in the end part of the shell from outside to inside;

the diameter of the output hole is smaller than that of the bearing chamber, a step surface is formed between the output hole and the bearing chamber, the angular contact bearing is axially assembled in the bearing chamber, an outer ring of the angular contact bearing is tightly attached to the step surface, the bearing pressing ring is axially riveted in the pressing ring assembling hole and tightly presses the end face of the outer ring of the angular contact bearing, and a plurality of riveting points are uniformly distributed and formed on the edge of the end face of the bearing pressing ring and the edge of the end face of the pressing ring assembling hole.

Further, the bearing pressing ring and the pressing ring assembling hole are in over fit.

Further, the axial thickness of the angular contact bearing is greater than the axial width of the bearing chamber.

Further, the angular contact bearing and the bearing chamber are over-fitted.

Further, the diameter of the pressing ring assembling hole is larger than that of the bearing chamber, namely the diameter of the outer wall of the bearing pressing ring is larger than that of the outer wall of the angular contact bearing.

Further, the number of the riveting points is 8-10.

Further, the bearing pressing ring is made of metal materials.

By adopting the technical scheme, the utility model discloses following beneficial effect has:

1. the utility model discloses simple workable compares in hollow nut's external screw thread and hollow portion and leans on stamping forming to say, and bearing clamping ring processing cost is lower, and the efficiency of whole assembly manufacturing is higher.

2. The utility model discloses a bearing clamping ring sticiss angular contact bearing, rivet through the bearing clamping ring axial and press in the clamping ring mounting hole and take shape and have a plurality of riveting points, form reliable, the effectual fastening effect of axial to angular contact bearing, be difficult not hard up, life is longer.

3. The utility model discloses an angular contact bearing is radial for excessively cooperating with the bearing room, can avoid the bearing room to radially produce effort and influence angular contact bearing's work advantage to angular contact bearing.

4. The utility model discloses angular contact bearing's axial thickness is greater than the axial width of bearing room, can guarantee that the bearing clamping ring assembles the back that targets in place, and the axial can fully hug closely the outer lane of pushing down angular contact bearing.

5. The utility model discloses a riveting point of a plurality of equipartitions comes axial fixity bearing clamping ring and then fixed angle contact bearing, has effectively avoided direct riveting angular contact bearing outer lane and then has influenced the risk of angular contact bearing work advantage.

Drawings

FIG. 1 is a schematic view of the structural assembly of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic partial cross-sectional view of the structure of FIG. 1;

fig. 4 is a schematic structural view of the housing of the present invention;

FIG. 5 is a schematic partial cross-sectional view of the structure of FIG. 4;

FIG. 6 is a schematic view of the inner riveting point of the present invention;

wherein, 1, a shell; 2. an output aperture; 3. a bearing chamber; 4. a clamping ring assembly hole; 5. an angular contact bearing; 6. pressing a ring by a bearing; 7. riveting points; 8. a step surface.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 to 6, in the present embodiment, an angular contact bearing fastening structure for a hollow shaft motor is provided, which is mainly composed of a housing 1, an angular contact bearing 5, and a bearing retainer 6. The end part of the machine shell 1 is sequentially provided with a coaxial output hole 2, a bearing chamber 3 and a clamping ring assembly hole 4 from outside to inside, a hollow shaft motor stator part is generally installed inside the machine shell 1, the output hole 2 is used for passing through a rotor hollow shaft, and meanwhile, an angular contact bearing 5 is needed between the hollow shaft and the end part of the machine shell 1 for auxiliary supporting, so that the angular contact bearing 5 also needs to be well fastened.

Compared with the traditional hollow nut fastening mode, the fastening mode is realized by adopting the structure of the bearing pressing ring 6. The specific design is that the diameter of the output hole 2 is smaller than that of the bearing chamber 3, a step surface 8 is formed between the output hole and the bearing chamber 3, the angular contact bearing 5 is axially assembled in the bearing chamber 3, the outer ring of the angular contact bearing 5 is tightly attached to the step surface 8 to be positioned, and meanwhile, the angular contact bearing 5 and the bearing chamber 3 are in over-radial fit, so that the radial acting force of the bearing chamber 3 on the angular contact bearing 5 can be avoided, and the working advantage of the angular contact bearing 5 can be prevented from being influenced. The bearing clamping ring 6 is axially riveted in the clamping ring assembling hole 4, the bearing clamping ring 6 tightly presses the outer ring end face of the angular contact bearing 5 to form a fastening effect, and meanwhile, the bearing clamping ring 6 and the clamping ring assembling hole 4 are in radial excessive fit, so that the axial reliable and effective fastening effect is formed on the angular contact bearing 5.

The present embodiment can be operated in this way during assembly, and the angular contact bearing 5 is press-fitted into the bearing chamber 3 from the inside of the housing 1 by using a special tool, and then the bearing pressing ring 6 is press-fitted into the pressing ring fitting hole 4 by using the special tool, and then the edge of the bearing pressing ring 6 is riveted by using the special tool for riveting the bearing, so as to form axial fixation for the bearing pressing ring 6. In addition, can have a plurality of riveting points 7 in the common equipartition shaping of riveting on the terminal surface edge of riveting bearing clamping ring 6 and the terminal surface edge of clamping ring pilot hole 4 after the riveting is accomplished, riveting point 7 specifically has eight in this embodiment, so come axial fixity bearing clamping ring 6 and then fixed angular contact bearing 5 through the riveting point 7 of eight equipartitions to direct riveting angular contact bearing 5 outer lane has effectively been avoided and has influenced the risk of its working advantage.

Specifically, the axial thickness of the angular contact bearing 5 is greater than the axial width of the bearing chamber 3, so that the bearing clamping ring 6 can be ensured to be fully and closely pressed on the outer ring of the angular contact bearing 5 in the axial direction after being assembled in place. Meanwhile, the diameter of the pressing ring assembling hole 4 is slightly larger than that of the bearing chamber 3, namely the diameter of the outer wall of the bearing pressing ring 6 is slightly larger than that of the outer wall of the angular contact bearing 5, so that the pressing of the angular contact bearing 5 can be facilitated on one hand, and the bearing pressing ring 6 can be ensured to fully press the edge of the outer ring of the angular contact bearing 5 on the other hand.

The bearing pressing ring 6 in the embodiment is made of metal materials, the embodiment is simple and easy to machine, and compared with the case that the external thread and the hollow part of the hollow nut are formed by punching, the bearing pressing ring 6 is lower in machining cost and higher in overall assembly and manufacturing efficiency.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments further describe the technical problems, technical solutions and advantages of the present invention in detail, it should be understood that the above only are embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides an angular contact bearing fastening structure for hollow shaft motor which characterized in that: the bearing comprises a shell (1), an angular contact bearing (5) and a bearing clamping ring (6), wherein the end part of the shell (1) is sequentially provided with a coaxial output hole (2), a bearing chamber (3) and a clamping ring assembling hole (4) from outside to inside;

the diameter of the output hole (2) is smaller than that of the bearing chamber (3) and forms a step surface (8) with the bearing chamber (3), the angular contact bearing (5) is axially assembled in the bearing chamber (3), the outer ring of the angular contact bearing (5) is tightly attached to the step surface (8), the bearing pressing ring (6) is axially riveted in the pressing ring assembling hole (4) and tightly presses the end surface of the outer ring of the angular contact bearing (5), and a plurality of riveting points (7) are uniformly distributed and formed on the edge of the end surface of the bearing pressing ring (6) and the edge of the end surface of the pressing ring assembling hole (4) together.

2. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the bearing pressing ring (6) is in over-fit with the pressing ring assembling hole (4).

3. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the axial thickness of the angular contact bearing (5) is greater than the axial width of the bearing chamber (3).

4. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the angular contact bearing (5) and the bearing chamber (3) are in over-fit.

5. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the diameter of the pressing ring assembling hole (4) is larger than that of the bearing chamber (3), namely the diameter of the outer wall of the bearing pressing ring (6) is larger than that of the outer wall of the angular contact bearing (5).

6. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the number of the riveting points (7) is 8-10.

7. An angular contact bearing fastening structure for a hollow shaft motor according to claim 1, wherein: the bearing pressing ring (6) is made of metal materials.