CN220566420U

CN220566420U - Bearing assembly and rotor device

Info

Publication number: CN220566420U
Application number: CN202322222660.1U
Authority: CN
Inventors: 李海洋
Original assignee: Shenzhen Topbond Motor Co ltd
Current assignee: Shenzhen Topbond Motor Co ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-03-08
Anticipated expiration: 2033-08-17

Abstract

The utility model relates to a bearing assembly and a rotor device, wherein the rotor device is provided with the bearing assembly; on the bearing assembly, the connecting cylinder is directly injection molded in a penetrating channel of the shaft tube, one bearing is respectively injection molded in the two accommodating grooves, the connecting cylinder and the two bearings are jointly injection molded in an integrated molding mode, and the connecting holes are respectively aligned with the two bearing holes; therefore, the tea is manufactured in an injection molding mode, so that the installation of the bearing is omitted, the assembly production efficiency is improved, meanwhile, the inner diameter change caused by the pressed installation of the bearing is avoided, and the precision of the tea is improved; the concentricity deviation of the two bearings can be effectively reduced, the matching error between the shaft core and the bearing assembly after the shaft core is arranged in a penetrating way is reduced, the dynamic balance is optimized, and the vibration quantity is reduced.

Description

Bearing assembly and rotor device

Technical Field

The utility model relates to the field of bearings, in particular to a bearing assembly and a rotor device.

Background

At present, no matter be used for torque input, torque output or torque transmission's components and parts, bearing assembly all is indispensable components and parts, play support pivoted effect, need use corresponding bearing assembly under different fields, different equipment or the different operating mode, different kinds of bearing assembly have different composition structure, for example, certain kind of bearing assembly includes the central siphon, the both ends of central siphon are provided with a plastic bearing respectively, the axle core can insert in the central siphon from the bearing of one section during the installation, then wear out from the bearing of the other end, accomplish bearing assembly's installation, however, this kind of bearing assembly has following shortcoming:

firstly, after two plastic bearings are correspondingly arranged at the end part of a shaft tube, the bearings are propped by the inner wall surface of the shaft tube to deform, so that the inner diameter of the bearings is compressed and irregularly deformed, the inner diameters of the bearings are misaligned, and the overall precision of a bearing assembly is lower;

secondly, the existence of manufacturing tolerance and assembly tolerance not only can lead to very poor concentricity of the two bearings after assembly, but also lead to larger deviation of central axes of the two bearings, and lead to larger matching error after assembly of the bearing assembly and the shaft core, namely, the shaft core and the bearing center are excessively displaced, so that the dynamic balance of the product is very poor in the process of transmitting torque, and the vibration quantity is excessively large;

thirdly, the two bearings are required to be assembled respectively, and the assembly production efficiency of the bearing assembly is low.

Disclosure of Invention

The utility model aims to provide a bearing assembly and a rotor device, which can improve precision, reduce vibration quantity and improve assembly production efficiency.

The first aspect of the present utility model provides a bearing assembly comprising a shaft tube and a support member disposed on the shaft tube;

two ends of the shaft tube are respectively provided with a containing groove, the shaft tube is provided with a penetrating channel along the longitudinal direction, one end of the penetrating channel is communicated with one containing groove, and the other end of the penetrating channel is communicated with the other containing groove;

the support piece comprises a connecting cylinder and two bearings, wherein the connecting cylinder is formed on the inner wall surface of the penetrating channel in an injection molding mode, the two bearings are arranged on the connecting cylinder in an integrated mode, the two bearings are arranged in the two accommodating grooves in a one-to-one correspondence mode, connecting holes are formed in the connecting cylinder, bearing holes are formed in the bearings, the connecting holes are respectively communicated with the two bearing holes to form a bearing channel, and the central axes of the connecting holes in the longitudinal direction are mutually overlapped with the central axes of the two bearing holes.

Preferably, each of the bearings is formed with a flange, and the flange abuts against an end of the connecting tube.

Preferably, each bearing abuts against the bottom and the wall of the accommodating groove.

Preferably, chamfers are arranged on the wall of each bearing hole.

Preferably, the bearing comprises a plastic bearing, the connecting cylinder comprises a plastic cylinder, and the shaft tube comprises a metal shaft tube.

Preferably, the outer diameter of the shaft tube is 8-15 mm, and the aperture of the bearing hole is 3-6 mm.

The second aspect of the present utility model provides a rotor device, which includes the bearing assembly according to any one of the above claims, and further includes a rotor assembly, where the rotor assembly includes a rotor core sleeved on the shaft tube, a sheath sleeved on the rotor core, and a plurality of magnetic pieces disposed between the sheath and the rotor core, and each of the magnetic pieces is circumferentially distributed about a central axis of the shaft tube.

Preferably, the rotor device further comprises a rotor housing integrally formed on the bearing assembly, a plurality of mounting ring grooves are formed in the outer side wall of the shaft tube, and anti-slip convex rings are formed in the mounting ring grooves on the rotor housing.

Preferably, the rotor core is provided with a plurality of glue passing channels, the rotor housing is provided with connecting columns in the glue passing channels, the rotor housing is respectively provided with an upper cover and a lower cover at two ends of the glue passing channels, and the upper cover and the lower cover respectively clamp the rotor core from the upper side and the lower side.

Preferably, the rotor assembly further comprises an impeller integrally formed with the rotor housing.

The implementation of the utility model has the following beneficial effects:

the utility model relates to a bearing assembly and a rotor device, wherein the rotor device is provided with the bearing assembly; on the bearing assembly, the connecting cylinder is directly injection molded in a penetrating channel of the shaft tube, one bearing is respectively injection molded in the two accommodating grooves, the connecting cylinder and the two bearings are jointly injection molded in an integrated molding mode, and the connecting holes are respectively aligned with the two bearing holes;

therefore, the tea is manufactured in an injection molding mode, so that the installation of the bearing is omitted, the assembly production efficiency is improved, meanwhile, the inner diameter change caused by the pressed installation of the bearing is avoided, and the precision of the tea is improved; the concentricity deviation of the two bearings can be effectively reduced, the matching error between the shaft core and the bearing assembly after the shaft core is arranged in a penetrating way is reduced, the dynamic balance is optimized, and the vibration quantity is reduced.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular descriptions of exemplary embodiments of the utility model as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the utility model.

FIG. 1 is a schematic diagram of a rotor apparatus according to some embodiments of the present utility model;

FIG. 2 is a cross-sectional view of the rotor apparatus shown in FIG. 1;

FIG. 3 is an exploded view of the rotor apparatus shown in FIG. 1;

FIG. 4 is a schematic illustration of the structure of a bearing assembly in some embodiments of the utility model;

FIG. 5 is a schematic illustration of an assembled bearing assembly and shaft core according to some embodiments of the present utility model;

fig. 6 is a schematic view of the internal structure of the bearing assembly of fig. 4.

Detailed Description

Embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While embodiments of the present utility model are illustrated in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the utility model. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Fig. 1 illustrates a rotor apparatus 10 in some embodiments of the present utility model, and the rotor apparatus 10 may be configured to be applied to various components for power output, power input or power transmission, not limited to a specific technical field or a specific device.

As shown in fig. 1, the rotor device 10 includes a bearing assembly 1 and a rotor assembly 2, the rotor assembly 2 is disposed on the bearing assembly 1, the bearing assembly 1 is used for supporting the rotor assembly 2 to rotate, and the rotor assembly 2 may be configured to have a certain magnetism, so that the rotor assembly 2 can rotate under force in a magnetic field.

As shown in fig. 2 to 4, the bearing assembly 1 includes a shaft tube 11 and a support 12 provided on the shaft tube 11. It will be appreciated that the shaft tube 11 serves to protect the support 12. The support 12 serves to support the rotation of the shaft tube 11.

After the bearing assembly 1 is assembled, the supporting member 12 may be inserted through the shaft core, so that the supporting member 12 may rotate around the shaft core. The shaft tube 11 may be fitted with corresponding components.

As shown in fig. 5 and 6, two receiving grooves 111 are respectively formed at two ends of the shaft tube 11, a penetrating channel 112 is formed in the shaft tube 11 along the longitudinal direction, one end of the penetrating channel 112 is communicated with one of the receiving grooves 111, and the other end of the penetrating channel 112 is communicated with the other receiving groove 111.

It will be appreciated that the receiving groove 111 and the through passage 112 together function to receive the support 12. The shaft tube 11 has an overall long cylindrical shape, and the longitudinal direction refers to the longitudinal direction extending direction of the shaft tube 11. Two ends of the penetrating channel 112 are respectively communicated with a containing groove 111.

As shown in fig. 5 and 6, specifically, the outer diameter D1 of the shaft tube 11 is 8mm to 15mm.

As shown in fig. 2 to 6, the supporting member 12 includes a connecting tube 121 injection molded on an inner wall surface of the through channel 112 and two bearings 122 integrally formed on the connecting tube 121, the two bearings 122 are disposed in the two accommodating grooves 111 in a one-to-one correspondence manner, a connecting hole 1211 is formed in the connecting tube 121, each bearing 122 is formed with a bearing hole 1221, the connecting holes 1211 are respectively communicated with the two bearing holes 1221 to form a bearing channel 123, and a central axis of the connecting hole 1211 in a longitudinal direction coincides with a central axis of the two bearing holes 1221.

It can be appreciated that the connecting cylinder 121 is integrally cylindrical, two ends of the connecting cylinder 121 are respectively connected with one bearing 122, the connecting cylinder 121 and the two bearings 122 are manufactured together in an injection molding mode, the trouble of manually assembling the two bearings 122 is avoided, the bearing 122 is prevented from being deformed when being extruded by the side wall of the connecting cylinder 121 during assembly, the aperture of the bearing hole 1221 is prevented from being deformed accidentally, and the aperture of the bearing hole 1221 is ensured to be good. The connecting hole 1211 and the two bearing holes 1221 are used together for the shaft core to pass through. The bearing 122 serves to support the rotation of the shaft tube 11.

In the actual production process, the shaft tube 11 is placed in an injection molding cavity of an injection mold, the glue stock is injected after the injection mold is clamped, the glue stock flows into the injection molding cavity to be in contact with the shaft tube 11, namely, the glue stock fills a gap between the side wall of the injection molding cavity and the shaft tube 11, specifically, the glue stock flows into the shaft tube 11 to be in contact with the inner wall surface of the penetrating channel 112, the connecting cylinder 121 is molded on the inner wall surface of the penetrating channel 112 after the glue stock is cooled, and the glue stock for molding the connecting cylinder 121 and the glue stock for molding the bearing 122 are in contact with each other, so that the connecting cylinder 121 and the bearing 122 are molded together in an integral molding way.

It should be noted that, the glue is in a flowing state before cooling and molding, so that the glue is not supported by the shaft tube 11, and the molding of the bearing 122 and the connecting cylinder 121 is dependent on the structure and composition of the injection molding cavity of the injection mold, so that the connecting hole 1211 and the two bearing holes 1221 can be accurately molded and aligned, and shrinkage deformation and the like caused by the supporting of the shaft tube 11 are avoided, thereby ensuring good concentricity. In this way, after the bearing assembly 1 is assembled with the shaft core, the fit error between the shaft core and the bearing channel 123 can be eliminated as much as possible, the processing precision is improved, the dynamic balance in the product operation process is greatly optimized, and the polarization is reduced. The two bearings 122 are integrally formed, so that the trouble of manually assembling the bearings is avoided, and the assembly and processing efficiency is improved.

It should be further noted that the fit clearance between the shaft core 20 and the bearing channel 123 may be flexibly set, and it is preferable that the support member 12 is capable of rotating and avoiding rattling.

As shown in fig. 5 and 6, specifically, the bore diameter D2 of the bearing hole 1221 is 3mm to 6mm.

As shown in fig. 2-6, in some embodiments of the bearing assembly 1, a flange 1222 is formed on each bearing 122, the flange 1222 abutting the end of the connecting barrel 121.

It will be appreciated that the two flanges 1222 abut the connection barrel 121 from opposite sides, respectively, such that the arrangement of the two flanges 1222 can function to locate the relative position of the support 12 and the shaft tube 11.

As shown in fig. 5 and 6, in some embodiments of the bearing assembly 1, each bearing 122 abuts against the groove bottom and the groove wall of the accommodating groove 111.

As can be appreciated, the side surfaces of the bearing 122 are connected to the groove walls of the accommodating groove 111, and the bottom surface of the bearing 122 is connected to the groove bottom of the accommodating groove 111.

Specifically, in some embodiments of the bearing assembly 1, chamfers are provided on the bore walls of each bearing bore 1221.

It can be appreciated that the chamfering plays a role in guiding assembly, and improves the assembly efficiency of the product.

As shown in fig. 2 and 3, in some embodiments of the bearing assembly 1, the bearing 122 comprises a plastic bearing, the connecting cylinder 121 comprises a plastic cylinder, and the shaft tube 11 comprises a metal shaft tube.

It can be appreciated that, the bearing 122 is configured as a plastic bearing instead of a metal bearing in the related art, and the connecting cylinder 121 is configured as a plastic cylinder to connect the two bearings 122, so that on one hand, the production cost can be reduced, and on the other hand, the bearing can be quickly manufactured in an injection molding manner, thereby improving the production efficiency. The shaft tube 11 is configured as a metal shaft tube, which can provide a better protection for the support 12.

As shown in fig. 1 to 3, in some embodiments of the rotor assembly 2, the rotor assembly 2 includes a rotor core 21 sleeved on the shaft tube 11, a sheath 22 sleeved on the rotor core 21, and a plurality of magnetic pieces 23 disposed between the sheath 22 and the rotor core 21, where each magnetic piece 23 is circumferentially distributed about a central axis of the shaft tube 11.

As can be appreciated, the rotor core 21 serves to enhance the magnetic field after magnetization. The sheath 22 serves to protect the magnetic member 23 and also serves to fix the magnetic member 23 together with the rotor core 21. The magnetic member 23 has a certain magnetic property, and the magnetic member 23 receives a certain magnetic force under the action of an external magnetic field, so that the rotor core 21 can be driven to rotate.

As shown in fig. 1 to 3, in some embodiments of the rotor assembly 2, the rotor device 10 further includes a rotor housing 24 integrally formed on the bearing assembly 1, a plurality of mounting ring grooves 113 are formed on an outer sidewall of the shaft tube 11, and a non-slip collar 241 is formed on the rotor housing 24 in each of the mounting ring grooves 113.

It will be appreciated that the rotor housing 24 is directly molded to the bearing assembly 1 by injection molding, and that the rotor housing 24 serves to secure the rotor core 21, the sheath 22, the magnetic member 23 and the bearing assembly 1. The mounting ring groove 113 functions to form the anti-slip collar 241, and after the anti-slip collar 241 is formed, the anti-slip collar 241 and the mounting ring groove 113 are fitted to each other to thereby function to fix the rotor housing 24 to the shaft tube 11.

As shown in fig. 2 and 3, in some embodiments of the rotor assembly 2, a plurality of glue passing channels 211 are formed on the rotor core 21, the rotor housing 24 is formed with connecting posts 242 in the glue passing channels 211, and the rotor housing 24 is formed with an upper cover 243 and a lower cover 244 at two ends of the glue passing channels 211, and the upper cover 243 and the lower cover 244 clamp the rotor core 21 from the upper side and the lower side, respectively.

As can be appreciated, the glue passage 211 is opened so that glue can flow into the glue passage 211 correspondingly, the glue flowing into the glue passage 211 is cooled and molded to form the connecting post 242, and the upper cover 243 and the lower cover 244 clamp and fix the rotor core 21, the sheath 22 and the magnetic member 23 from two opposite sides respectively.

As shown in fig. 1, in some embodiments of the rotor assembly 2, the rotor assembly further includes an impeller 245 integrally formed with the rotor housing 24.

It will be appreciated that the impeller 245 is used to drive the movement of the media during rotation for the purpose of transporting the media. For example, to deliver a liquid.

It should be noted that, in different fields or different devices, the impeller 245 may be replaced by a structure that can play a driving role in other rotation processes. The rotor housing 24 is not limited to the provision of the impeller 245 for operation.

The implementation of the utility model has the following beneficial effects:

The aspects of the present utility model have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. Those skilled in the art will also appreciate that the acts and modules referred to in the specification are not necessarily required for the present utility model. In addition, it can be understood that the steps in the method of the embodiment of the present utility model may be sequentially adjusted, combined and pruned according to actual needs, and the modules in the device of the embodiment of the present utility model may be combined, divided and pruned according to actual needs.

The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A bearing assembly, characterized by comprising a shaft tube (11) and a support (12) arranged on the shaft tube (11);

two ends of the shaft tube (11) are respectively provided with a containing groove (111), the shaft tube (11) is provided with a penetrating channel (112) along the longitudinal direction, one end of the penetrating channel (112) is communicated with one containing groove (111), and the other end of the penetrating channel (112) is communicated with the other containing groove (111);

the support piece (12) comprises a connecting cylinder (121) formed on the inner wall surface of the penetrating channel (112) in an injection molding mode and two bearings integrally formed on the connecting cylinder (121), the two bearings are arranged in the two accommodating grooves (111) in a one-to-one correspondence mode, connecting holes (1211) are formed in the connecting cylinder (121), bearing holes (1221) are formed in the bearings, the connecting holes (1211) are respectively communicated with the two bearing holes (1221) to form a bearing channel (123), and the central axes of the connecting holes (1211) in the longitudinal direction are mutually overlapped with the central axes of the two bearing holes (1221).

2. The bearing assembly of claim 1, wherein each bearing has a flange (1222) formed thereon, the flange (1222) abutting an end of the connecting barrel (121).

3. Bearing assembly according to claim 1, wherein each bearing abuts against the groove bottom and groove wall of the receiving groove (111).

4. Bearing assembly according to claim 1, wherein a chamfer is provided on the bore wall of each bearing bore (1221).

5. Bearing assembly according to claim 1, wherein the bearing (122) comprises a plastic bearing, the connecting cylinder (121) comprises a plastic cylinder, and the shaft tube (11) comprises a metal shaft tube.

6. Bearing assembly according to any of claims 1 to 5, wherein the outer diameter of the shaft tube (11) is 8-15 mm and the bore diameter of the bearing bore (1221) is 3-6 mm.

7. A rotor device, characterized by comprising the bearing assembly according to any one of claims 1 to 6, further comprising a rotor assembly (2), wherein the rotor assembly (2) comprises a rotor core (21) sleeved on the shaft tube (11), a sheath (22) sleeved on the rotor core (21), and a plurality of magnetic pieces (23) arranged between the sheath (22) and the rotor core (21), and each magnetic piece (23) is circumferentially distributed with the central axis of the shaft tube (11).

8. The rotor device according to claim 7, further comprising a rotor housing (24) integrally formed on the bearing assembly, wherein a plurality of mounting ring grooves (113) are formed in an outer side wall of the shaft tube (11), and the rotor housing (24) is formed with anti-slip protruding rings (241) in each of the mounting ring grooves (113).

9. The rotor device according to claim 8, wherein a plurality of glue passing channels (211) are formed in the rotor core (21), connecting posts (242) are formed in the glue passing channels (211) by the rotor housing (24), an upper cover (243) and a lower cover (244) are respectively formed at two ends of the glue passing channels (211) by the rotor housing (24), and the upper cover (243) and the lower cover (244) respectively clamp the rotor core (21) from upper and lower sides.

10. The rotor apparatus of claim 8 wherein the rotor assembly further comprises an impeller (245) integrally formed on the rotor housing (24).