CN210468986U

CN210468986U - Bearing structure and motor

Info

Publication number: CN210468986U
Application number: CN201921663671.0U
Authority: CN
Inventors: 邹文彦; 白祖辉; 袁再华; 陈热情; 郑朝阳
Original assignee: Hunan Changshui Electric Power Transfer Motor Co Ltd
Current assignee: Hunan Changshui Electric Power Transfer Motor Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-05
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a bearing structure and motor, bearing structure includes that bearing group and cover establish the bearing cap in the bearing group outside, bearing group is used for the cover to establish in the pivot, bearing group includes first bearing and second bearing, bearing cap with leave the space between the first bearing, bearing cap with the second bearing contacts, the axial force that motor shaft and cast aluminium rotor produced when first bearing is used for bearing and comes from the motor operation, the radial force that the load that drives produced when the second bearing is used for bearing and comes from the motor operation. The utility model discloses an at two bearings of non-axle extension end installation, will originally act on two forces on a bearing, act on two bearings, utilize a bearing to bear a power respectively, reduced the load of single bearing, prolonged the life of bearing.

Description

Bearing structure and motor

Technical Field

The utility model relates to a motor element technical field, in particular to bearing structure and motor.

Background

The motor consists of a rotor and a stator, wherein a rotating component in the motor is called the rotor, a static component is called the stator, and the rotor comprises a rotating shaft and a cast aluminum rotor. As the power source of various machines, the motor outputs torque through the rotating shaft, the bearing is used as an important part of the motor to support the rotating shaft to operate, the rotating shaft is positioned outside the motor and used for connecting other mechanical equipment and is provided with a shaft extension end, the rotating shaft is positioned inside the motor and is provided with a non-shaft extension end, and the shaft extension end and the non-shaft extension end of the rotating shaft are both provided with the bearing. When the motor runs, the bearing arranged on the non-shaft extension end needs to bear the axial force from the rotor and the radial force of the load driven by the motor when the motor runs, and the existing motor is generally only provided with one bearing on the non-shaft extension end, so that the bearing is often subjected to overlarge stress to generate noise, thereby further influencing the running of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bearing structure and motor aims at improving the bearing in the motor among the prior art and influences the motor moving problem because of the atress is too big.

In order to achieve the above object, the utility model relates to a bearing structure, establish including bearing group and cover the bearing cap in the bearing group outside, bearing group is used for the cover to establish in the pivot, bearing group includes first bearing and second bearing, bearing cap with leave the space between the first bearing, bearing cap with the second bearing contacts, the axial force that motor shaft and cast aluminium rotor produced when first bearing is used for bearing and comes from the motor operation, the radial force that the load that drives produced when the second bearing is used for bearing comes from the motor operation.

Optionally, the bearing structure further comprises an inner bearing cover sleeved on the rotating shaft, and the inner bearing cover is fixedly connected with the bearing end cover.

Optionally, the bearing structure further includes a fixing member for sleeving the rotating shaft, and the fixing member is used for fixing the inner ring of the second bearing on the rotating shaft.

Optionally, the fixing member is a lock nut.

Optionally, the first bearing and the second bearing are angular contact ball bearings or deep groove ball bearings.

Optionally, the bearing structure further comprises a bearing outer cover sleeved on the rotating shaft, and the bearing outer cover is fixedly connected with the bearing end cover.

Optionally, the bearing outer cover comprises an oil hole arranged on the outer side of the bearing outer cover.

Optionally, the bearing outer cover further comprises an oil drain hole arranged on the outer side of the bearing outer cover, and the oil drain hole is opposite to the oil filling hole.

Furthermore, the utility model also provides a motor, include pivot, cast aluminium rotor, casing and as aforesaid bearing structure, bearing structure and cast aluminium rotor all overlap and establish in the pivot, the pivot is passed through bearing structure installs on the casing.

The utility model discloses in the scheme, bearing housing installs on motor housing, first bearing and the equal cover of second bearing are established at the non-axle of pivot and are stretched the end, and first bearing and second bearing are all fixed through bearing housing, but there is the space between first bearing and bearing housing, second bearing and bearing housing contact, therefore, when the motor operation, because first bearing and bearing housing do not contact completely, so first bearing only bears the axial force who comes from motor shaft and cast aluminium rotor, and second bearing and bearing housing contact, so the second bearing mainly bears the produced radial force of load that drives when coming from the motor operation. The utility model discloses a bearing structure, through addding a bearing, will be used in two forces on a bearing originally, be used in two bearings, utilize a bearing to bear a force respectively, reduced the load of single bearing, prolonged the life of bearing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of a bearing structure according to an embodiment of the present invention;

fig. 2 is an enlarged schematic view of a point a in fig. 1.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Bearing set	2	Bearing end cap
11	First bearing	3	Bearing inner cover
				111	First inner ring	4	Fixing piece
112	First outer ring	5	Bearing outer cover
				12	Second bearing	51	Oil filler hole
121	Second inner ring	52	Oil drain hole
				122	Second outer ring	6	Rotating shaft

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The utility model provides a bearing structure, as shown in fig. 1 and fig. 2, establish bearing end cover 2 in the bearing group 1 outside including bearing group 1 and cover, wherein, bearing group 1 is used for the cover to establish in pivot 6, bearing group 1 includes first bearing 11 and second bearing 12, leave the space between bearing end cover 2 and the first bearing 11, bearing end cover 2 contacts with second bearing 12, first bearing 11 is used for bearing the axial force that comes from motor shaft 6 and cast aluminium rotor production when motor operation, second bearing 12 is used for bearing the radial force that comes from the load production that motor operation time drove.

In the existing bearing structure of the vertical motor, only one bearing is installed on the non-shaft-extending end of the rotating shaft, so that the bearing respectively bears the axial force from the rotating shaft of the motor and the cast-aluminum rotor and the radial force generated by the load driven by the motor during operation.

However, in the utility model discloses in, bearing housing 2 installs on motor housing (not shown in the figure), bearing group 1 is equipped with to the non-axle extension end of pivot 6, bearing group 1 fixes through bearing housing 2, this bearing group 1 includes first bearing 11 and second bearing 12, wherein, the bearing comprises outer lane and inner circle and the ball that is located between the inner and outer lane, because first inner circle 111 cover of first bearing 11 is established on pivot 6, there is the space between the second outer lane 112 of first bearing 11 and the inner wall of bearing housing 2, therefore, when the motor drives the load operation, because first bearing 11 does not contact with bearing housing 2 at all, so first bearing 11 only bears the axial force from motor pivot and cast aluminium rotor; and the second outer ring 122 of the second bearing 12 is in contact with the bearing end cover 2, so that the second bearing 12 is mainly used for bearing the radial force generated by the load driven by the motor during operation. Compared with the prior art, the two bearings are installed at the non-shaft-extension end, two forces originally acting on one bearing act on the two bearings respectively, one bearing bears one force, the load born by the single bearing is reduced, and the service life of the bearing is prolonged.

Referring to fig. 1, in an embodiment, the bearing structure further includes an inner bearing cover 3 sleeved on the rotating shaft 6, wherein a threaded hole (not shown) is formed in the inner bearing cover 3, a first through hole (not shown) is formed in the bearing end cap 2, the threaded hole is communicated with the first through hole, and a bolt sequentially passes through the first through hole and the threaded hole to fix the inner bearing cover 3 on the bearing end cap 2.

Referring to fig. 1, in another embodiment, the bearing structure further includes a fixing member 4 for being sleeved on the rotating shaft 6, and the fixing member 4 is used for fixing the second inner ring 121 of the second bearing 12 on the rotating shaft 6. So, can prevent that first bearing 11 and second bearing 12 when following pivot 6 and rotating, take place to remove along the axis direction of pivot 6, can fix the bearing effectively through mounting 4 and bearing inner cup 3, prevent that the bearing from taking place to remove along pivot 6, influencing the phenomenon that the motor used.

As shown in fig. 1, the fixing member 4 provided in an embodiment is a lock nut, and the rotating shaft 6 for sleeving the lock nut is provided with a thread matching with the lock nut, so that the distance between the bearings on the rotating shaft 6 can be adjusted by adjusting the nut, which is convenient for more accurately installing the bearings on the motor casing.

In a more preferred embodiment, as shown in fig. 1, the first bearing 11 and the second bearing 12 are angular contact ball bearings or deep groove ball bearings. The angular contact ball bearing can bear radial load and axial load at the same time, and can work at a higher rotating speed; the deep groove ball bearing can bear radial load and axial load at the same time, but is mainly used for bearing the radial load, is suitable for running at high rotating speed and extremely high rotating speed, and has small friction coefficient, so the two bearings are generally selected in the motor, the efficiency of the motor can be improved, and the service life of the bearing is prolonged. In the present embodiment, the first bearing 11 is an angular contact ball bearing, and the second bearing 12 is a deep groove ball bearing.

In a more preferred embodiment, the bearing structure further includes a bearing outer cover 5 for covering the rotating shaft 6, the bearing outer cover 5 is provided with a second through hole (not shown) communicating with the first through hole of the bearing end cover 2 and the threaded hole of the bearing inner cover 3, and the bearing outer cover 5, the bearing end cover 2 and the bearing inner cover 3 can be connected together by sequentially passing bolts through the second through hole, the first through hole and the threaded hole, so that when the fixing member 4 is loosened, the bearing can be fixed by the bearing outer cover 5, and the probability that the bearing moves along the rotating shaft 6 is reduced.

Specifically, as shown in fig. 1, the bearing outer cover 5 includes an oil filling hole 51 formed in the outer side of the bearing outer cover 5, so that the service life of the bearing is prolonged for reducing the friction of the bearing, and when the bearing is filled with oil, the bearing outer cover 5 does not need to be detached, the operation is convenient, and the number of working procedures is reduced.

More specifically, as shown in fig. 1, the bearing outer cover 5 further includes an oil drain hole 52 provided outside the bearing outer cover 5, the oil drain hole 52 being disposed opposite to the oil hole 51. Like this, need not to dismantle bearing enclosing cover 5 through the manual work and realize the clearance to remaining the waste liquid in the bearing, the operation of being convenient for has reduced staff's work load.

Furthermore, the utility model provides a motor, including pivot 6, cast aluminium rotor, casing and foretell bearing structure, wherein, bearing structure and cast aluminium rotor all overlap and establish in pivot 6, and pivot 6 passes through bearing structure and installs on the casing. The specific structure of the bearing structure refers to the above embodiments, and since the motor adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. The utility model provides a bearing structure, its characterized in that establishes including bearing group and cover the bearing cap in the bearing group outside, bearing group is used for the cover to establish in the pivot, bearing group includes first bearing and second bearing, bearing cap with leave the space between the first bearing, bearing cap with the second bearing contacts, the axial force that motor shaft and cast aluminium rotor produced when first bearing is used for bearing and comes from the motor operation, the radial force that the load that drives produced when the second bearing is used for bearing comes from the motor operation.

2. The bearing structure of claim 1 further comprising an inner bearing cap disposed over the shaft, wherein the inner bearing cap is fixedly connected to the end cap.

3. The bearing structure of claim 1 further comprising a fixing member disposed around the shaft for fixing the inner race of the second bearing to the shaft.

4. The bearing structure of claim 3 wherein the securing member is a lock nut.

5. The bearing structure of claim 1 wherein the first and second bearings are angular contact ball bearings or deep groove ball bearings.

6. The bearing structure according to any one of claims 1 to 5, further comprising a bearing outer cover sleeved on the rotating shaft, wherein the bearing outer cover is fixedly connected with the bearing end cover.

7. The bearing structure according to claim 6, wherein the bearing outer cover includes an oil hole provided outside the bearing outer cover.

8. The bearing structure according to claim 7, wherein the bearing outer cover further comprises an oil drain hole provided outside the bearing outer cover, the oil drain hole being disposed opposite to the oil filler hole.

9. An electric motor, characterized in that, including pivot, cast aluminium rotor, casing and according to the bearing arrangement of any one of claims 1 ~ 8, bearing arrangement and cast aluminium rotor all overlap and establish in the pivot, the pivot passes through bearing arrangement installs on the casing.