CN219535801U - Bearing assembly, motor and dryer - Google Patents

Abstract

The utility model provides a bearing assembly, a motor and an air duct, wherein the motor and the air duct respectively comprise the bearing assembly, when the bearing assembly is worn, an elastic piece pushes an inner ring of a second bearing to move in a direction opposite to a first bearing, and at the moment, the second inner ring and a second outer ring are dislocated, so that the play of the second bearing is reduced, and a second rolling part can be attached to the second inner ring and the second outer ring all the time. Because the second outer lane, first outer lane and bearing housing are fixed connection, first outer lane also can receive a pulling force so that first outer lane takes place corresponding displacement this moment, and first outer lane and first inner circle can also take place the dislocation simultaneously to make the play of first bearing reduce. The scheme can reduce the clearance between the first bearing and the second bearing, thereby prolonging the service life of the bearing assembly.

Description

Bearing assembly, motor and dryer

Technical Field

The utility model relates to the field of motors, in particular to a bearing assembly, a motor and an air duct.

Background

With more and more kinds of electrical appliances, a large part of electrical appliances can use a motor, such as a common dryer in life, the dryer has the characteristics of small volume and large air output, the motor rotation speed in the conventional dryer is required to be very high, the high rotation speed of an output shaft of the motor can improve the load of a bearing, so that abrasion occurs between a ball and an inner ring or an outer ring of the bearing, and the abrasion increases the gap between the ball and the inner ring or the outer ring as shown in fig. 1. Under the condition, abnormal sound can be generated when the electric equipment is used, and the eccentricity and damage of the output shaft can be caused, so that the service life of the motor is not long.

In order to solve the above problems, the bearing mounting manner in the brushless dc motor of the prior art is as follows:

the bearing is provided with an inner ring and an outer ring, and the prior art adds a spring to the outer ring of the bearing to pre-tighten the outer ring of the bearing, so that the outer ring and the inner ring of the bearing deviate to generate dislocation of the outer ring and the inner ring, and the play of the bearing is controlled.

But the outer ring of the bearing is fixed with the inner wall of the bearing chamber of the shell in an adhesion way, the inner ring of the bearing is fixed with the shaft, and the fan blades are fixed with the shaft. When the motor runs, the fan blade, the shaft and the bearing inner ring rotate together, at the moment, the stress of the bearing inner ring can be changed through the shaft under the action of the fan blade, the pretightening force of the bearing can be changed by the stress, the movement of the ball in the bearing is influenced, the damage of the ball is aggravated, and the service life of the bearing is further influenced.

In summary, the technical problems to be solved by the utility model are as follows: on the premise of high-rotation-speed running of the motor, the technical problem that the service life of a bearing on an output shaft of the existing motor is low is solved.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a bearing assembly, wherein the first bearing and the second bearing are respectively dislocated under the action of an elastic piece so as to achieve the purpose of reducing the play of the bearings, and the precision and the service life of the bearing assembly can be improved.

Specifically, the utility model provides a bearing assembly which is used for being installed on a rotating shaft and comprises a first bearing, a second bearing, a bearing sleeve and an elastic piece, wherein the first bearing is internally provided with a first inner ring and a first outer ring, a first rolling part is arranged between the first inner ring and the first outer ring, the second bearing is internally provided with a second inner ring and a second outer ring, and a second rolling part is arranged between the second inner ring and the second outer ring;

the first inner ring is arranged on the rotating shaft, the second inner ring is slidably arranged on the rotating shaft, and the elastic piece is used for enabling the second inner ring to be far away from the first inner ring;

the first outer ring and the second outer ring are respectively fixed on the inner wall of the bearing sleeve.

The first inner ring may be fixedly mounted on the rotating shaft, or the first inner ring may be slidably mounted on the rotating shaft.

Preferably, a shaft sleeve is arranged between the first inner ring and the second inner ring, the shaft sleeve is fixed on the rotating shaft, and the shaft sleeve is used for propping the first inner ring.

Preferably, the elastic piece is a spring, the spring is sleeved on the rotating shaft, one end of the spring is abutted against the shaft sleeve, and the other end of the spring is abutted against the second inner ring.

In addition, the utility model also provides a motor, and the bearing assembly is arranged on the rotating shaft of the motor.

The scheme also provides an air duct which comprises a machine shell and fan blades, wherein the motor is arranged in the machine shell, and the fan blades are arranged on a rotating shaft of the motor.

Further, a mounting chamber for mounting the bearing sleeve is arranged in the machine shell.

Further, the bearing sleeve can slide along the axial direction of the rotating shaft.

The beneficial effects are that:

in the utility model, after the first bearing and the second bearing are worn, the play of the first bearing and the second bearing can be increased, at the moment, under the action of the elastic piece, the inner ring of the second bearing is pushed by the elastic piece to move back to the first bearing, at the moment, the second inner ring and the second outer ring are dislocated, so that the play of the second bearing is reduced, and the second rolling part can be always attached to the second inner ring and the second outer ring. Because the second outer ring, the first outer ring and the bearing sleeve are fixedly connected, the first outer ring can also be subjected to a tensile force at the moment so that the first outer ring is correspondingly displaced; at the same time, the first outer ring and the first inner ring are dislocated, so that the play of the first bearing is reduced. The scheme can reduce the clearance between the first bearing and the second bearing, thereby prolonging the service life of the bearing assembly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a schematic view of a prior art bearing with play;

FIG. 2 is a schematic cross-sectional view of the air duct in this embodiment;

fig. 3 is a schematic structural view of an initial state of the bearing assembly in the present embodiment;

fig. 4 is a schematic view of the structure of the bearing assembly after wear in this embodiment.

Wherein reference numerals are as follows:

1-a first bearing; 2-a second bearing; 3-bearing sleeves; 4-elastic members; 5-rotating shaft; 6-shaft sleeve; 7-fan blades; 8-a shell; 9-play; 10-an electric motor; 11-a first inner ring; 12-a first outer ring; 13-a first rolling part; 21-a second inner ring; 22-a second outer race; 23-second scrolling part.

Detailed Description

The utility model is described in further detail below with reference to the accompanying drawings.

As shown in fig. 3 and 4, the present embodiment proposes a bearing assembly for mounting on a rotating shaft 5, comprising a first bearing 1, a second bearing 2, a bearing housing 3 and an elastic member 4, wherein the first bearing 1 has a first inner ring 11 and a first outer ring 12, a first rolling portion 13 is provided between the first inner ring 11 and the first outer ring 12, a second inner ring 21 and a second outer ring 22 are provided in the second bearing 2, and a second rolling portion 23 is provided between the second inner ring 21 and the second outer ring 22;

the first inner ring 11 is mounted on the rotating shaft 5, the second inner ring 21 is slidably arranged on the rotating shaft 5, and the elastic member 4 is used for keeping the second inner ring 21 away from the first inner ring 11;

the first outer race 12 and the second outer race 22 are fixed to the inner wall of the bearing housing 3, respectively.

The first inner ring 11 may be fixed or slidably mounted on the rotating shaft 5.

In this solution, after the first bearing 1 and the second bearing 2 wear, the play 9 between the first bearing 1 and the second bearing 2 may increase, and at this time, under the action of the elastic element 4, the second inner ring 21 of the second bearing 2 is pushed by the elastic element 4 to move in a direction opposite to the first bearing 1, and at this time, the second inner ring 21 and the second outer ring 22 are dislocated, so that the play 9 between the second bearing 2 is reduced, and the second rolling portion 23 is always attached to the second inner ring 21 and the second outer ring 22. Because the second outer ring 22, the first outer ring 12 and the bearing sleeve 3 are fixedly connected, the first outer ring 12 is also subjected to a tensile force at this time to enable the first outer ring 12 to correspondingly displace, and meanwhile, the first outer ring 12 and the first inner ring 11 are also dislocated, so that the clearance 9 of the first bearing 1 is reduced.

It should be clear to a person skilled in the art that the first bearing 1 and the second bearing 2 described above are only used for distinguishing between two bearings. After the solution, it should also be within the scope of protection of the solution if an exchange of the positions of the first bearing 1 and the second bearing 2 occurs.

The first rolling portion 13 and the second rolling portion 23 are balls, respectively.

In the use process of the bearing, the clearance 9 can be always maintained in a small range, so that on one hand, the working accuracy of the bearing is always high, and the bearing is not easy to produce abnormal sound and damage.

As an implementation manner of this embodiment, a sleeve 6 is disposed between the first inner ring 11 and the second inner ring 21, the sleeve 6 is fixed on the rotating shaft 5, and the sleeve 6 is used for abutting against the first inner ring 11.

The first inner ring 11 can be effectively limited through the shaft sleeve 6, so that the first inner ring 11 can be prevented from moving towards the second inner ring 21.

As an implementation manner of this embodiment, the elastic member 4 is a spring, the spring is sleeved on the rotating shaft 5, one end of the spring abuts against the shaft sleeve 6, and the other end of the spring abuts against the second inner ring 21.

In addition, as shown in fig. 2, the present solution also proposes a motor 10, and the above-mentioned bearing assembly is mounted on the rotating shaft 5 of the motor 10. The motor 10 further includes a stator assembly, a rotor assembly and an insulating housing, wherein the stator assembly and the rotor assembly are disposed in the insulating housing, and the rotor assembly is used for driving the rotor assembly to rotate, which belongs to the prior art, and the scheme is not described in detail.

As shown in fig. 2, the present solution further provides an air duct, which includes a casing 8 and a fan blade 7, wherein the casing 8 is provided with the motor 10, and the fan blade 7 is installed on the rotating shaft 5 of the motor 10.

Because the air output of the air duct is large, the requirements on the motor 10 and the bearing are high, and the motor is generally a brushless motor which is difficult to damage, but the bearing is obviously damaged in the use process, and the bearing in the prior art is worn and abnormal after being used for a period of time, so that the damage and scrapping of the air duct are easily caused. By adopting the bearing assembly of the scheme, the bearing can be ensured to work efficiently in a long time, and the service life of the air duct is prolonged.

Further, a mounting chamber for mounting the bearing housing 3 is provided in the housing 8. Further, the bearing sleeve 3 can slide along the axial direction of the rotating shaft 5.

In the prior art, if the bearing is used for a period of time, as shown in fig. 1, the play 9 at the ball is increased, which affects the use of the bearing.

In the use process of the bearing in the scheme, if the first bearing 1 and the second bearing 2 are worn, as shown in fig. 4, at this time, under the action of the elastic piece 4, the inner ring of the second bearing 2 is pushed by the elastic piece 4 to move in a direction opposite to the first bearing 1, and at this time, the second inner ring 21 and the second outer ring 22 are dislocated, so that the play 9 of the second bearing 2 is reduced, and the second rolling part 23 can be attached to the second inner ring 21 and the second outer ring 22 all the time. Since the second outer ring 22, the first outer ring 12 and the bearing housing 3 are fixedly connected, the first outer ring 12 is also subjected to a tensile force to enable the first outer ring 12 to correspondingly displace, but the position of the first inner ring 11 is fixed, and the first outer ring 12 and the first inner ring 11 are dislocated, so that the play 9 of the first bearing 1 is reduced.

It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the utility model.

Claims (8)

1. The bearing assembly is used for being installed on a rotating shaft (5), and is characterized by comprising a first bearing (1), a second bearing (2), a bearing sleeve (3) and an elastic piece (4), wherein a first inner ring (11) and a first outer ring (12) are arranged in the first bearing (1), a first rolling part (13) is arranged between the first inner ring (11) and the first outer ring (12), a second inner ring (21) and a second outer ring (22) are arranged in the second bearing (2), and a second rolling part (23) is arranged between the second inner ring (21) and the second outer ring (22);

the first inner ring (11) is mounted on the rotating shaft (5), the second inner ring (21) is slidably arranged on the rotating shaft (5), and the elastic piece (4) is used for enabling the second inner ring (21) to be far away from the first inner ring (11);

the first outer ring (12) and the second outer ring (22) are respectively fixed on the inner wall of the bearing sleeve (3).

2. Bearing assembly according to claim 1, wherein the first inner ring (11) is slidably mounted on the rotating shaft (5) or wherein the first inner ring (11) is fixed on the rotating shaft (5).

3. Bearing assembly according to claim 2, characterized in that a sleeve (6) is arranged between the first inner ring (11) and the second inner ring (21), the sleeve (6) being fixed on the rotating shaft (5), and the sleeve (6) being adapted to abut the first inner ring (11).

4. A bearing assembly according to claim 3, characterized in that the elastic member (4) is a spring, which is sleeved on the rotating shaft (5), one end of the spring is abutted against the shaft sleeve (6), and the other end of the spring is abutted against the second inner ring (21).

5. An electric motor, characterized in that a bearing assembly according to any one of claims 1 to 4 is mounted on a rotating shaft (5) of the motor.

6. An air duct is characterized by comprising a machine shell (8) and fan blades (7), wherein the motor as claimed in claim 5 is installed in the machine shell (8), and the fan blades (7) are installed on a rotating shaft (5) of the motor.

7. A duct according to claim 6, characterized in that the housing (8) is provided with a mounting chamber for the bearing housing (3).

8. A duct according to claim 7, characterized in that the bearing bush (3) is slidable along the axis of the shaft (5).