CN213973563U

CN213973563U - Wheel hub bearing mounting structure, wheel hub motor and electric automobile

Info

Publication number: CN213973563U
Application number: CN202022977717.5U
Authority: CN
Inventors: 赵泽鹏; 崔一鹏; 冯超
Original assignee: Beijing Cuifeng Capital Investment Co Ltd
Current assignee: Shanxi Donghui New Energy Automobile Research Institute Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-08-17
Anticipated expiration: 2030-12-09

Abstract

The application provides a wheel hub bearing mounting structure, in-wheel motor and electric automobile, mounting structure includes: the central frame is used for mounting the stator core and is provided with an assembling hole; and the bearing sleeve is used for assembling the hub bearing, and the bearing sleeve is inserted in the assembling hole and is in interference fit with the assembling hole. During the assembly, the bearing bush is pegged graft in the pilot hole on the centre frame, and bearing bush and pilot hole be interference fit to realize the fixed connection of bearing bush and centre frame, need not set up extra bolt and fix bearing bush and centre frame, reduced the use of bolt, reduced assembly bolt's process, thereby make the assembly process simpler, the assembly step is more succinct, and the assembly is more convenient, improves assembly efficiency, reduction in production cost.

Description

Wheel hub bearing mounting structure, wheel hub motor and electric automobile

Technical Field

The utility model relates to a new energy automobile field particularly, relates to a wheel hub bearing mounting structure, in-wheel motor and electric automobile.

Background

In the existing hub motor, a hub bearing is connected with a center frame of the hub motor through a bearing sleeve, during assembly, the bearing sleeve is connected with the center frame in an embedded mode, the inserting position is in clearance fit, then a bolt is additionally arranged between the center frame and the bearing sleeve for fixing, through the design, the installation procedure is increased, and the whole weight of the hub motor is increased due to the use of the bolt.

The inventor researches and discovers that the assembly structure of the center frame and the bearing sleeve of the existing hub motor has the following defects:

the process is complicated and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a wheel hub bearing mounting structure, a wheel hub motor and an electric automobile, which can simplify the assembly process of a center frame and a bearing sleeve, reduce the assembly difficulty and save the processing cost; meanwhile, the weight of the hub motor can be reduced, and the energy consumption is reduced.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a hub bearing mounting structure, including:

the central frame is used for mounting the stator core and is provided with an assembling hole;

and the bearing sleeve is used for assembling the hub bearing, and the bearing sleeve is inserted in the assembling hole and is in interference fit with the assembling hole.

In an optional embodiment, the bearing sleeve comprises a plug-in part and a limiting part which are connected, and the plug-in part is in interference fit with the assembly hole; the limiting part protrudes out of the peripheral surface of the insertion part, and the limiting part is abutted against the central frame so as to limit the insertion depth of the insertion part.

In an alternative embodiment, the limiting part is an annular structure arranged around the center line of the insertion part.

In an optional embodiment, the limiting portion is provided with a positioning hole through which the signal wire passes.

In an alternative embodiment, the number of the positioning holes is multiple, and the multiple positioning holes are arranged at intervals in the circumferential direction of the insertion part.

In an optional embodiment, the hub bearing mounting structure further includes a sealing ring, and the sealing ring is sleeved outside the bearing sleeve and located in the assembling hole to seal a connecting position of the bearing sleeve and the center frame.

In an alternative embodiment, the inner peripheral wall of the fitting hole is provided with a positioning groove, and the sealing ring is arranged in the positioning groove.

In an optional implementation mode, the center frame is provided with a avoiding hole, a flexible sleeve is arranged in the avoiding hole, and the flexible sleeve is used for the signal line to penetrate through and position the signal line.

In a second aspect, the present invention provides an in-wheel motor, the in-wheel motor includes:

a hub bearing and the hub bearing mounting structure of any one of the preceding embodiments, the hub bearing being fitted within the bearing housing.

Third aspect, the utility model provides an electric automobile, electric automobile includes:

the in-wheel motor of the foregoing embodiments.

The embodiment of the utility model provides a beneficial effect is:

in summary, the present embodiment provides a hub bearing mounting structure that mounts a hub bearing to a center frame through a bearing housing. During the assembly, the bearing bush is pegged graft in the pilot hole on the centre frame, and bearing bush and pilot hole be interference fit to realize the fixed connection of bearing bush and centre frame, need not set up extra bolt and fix bearing bush and centre frame, reduced the use of bolt, reduced assembly bolt's process, thereby make the assembly process simpler, the assembly step is more succinct, and the assembly is more convenient, improves assembly efficiency, reduction in production cost.

Meanwhile, bolts are not needed for fixing the bearing sleeve and the center frame, so that the overall weight of the hub motor can be reduced, the weight of the whole vehicle is reduced, and energy consumption is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a part of a structure of an in-wheel motor according to an embodiment of the present invention;

fig. 2 is an exploded schematic structural view of a part of the structure of the in-wheel motor according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a deformation structure of an in-wheel motor according to an embodiment of the present invention.

Icon:

001-signal line; 100-a center frame; 101-a first side; 102-a second side; 110-assembly holes; 120-avoiding holes; 121-a first bore section; 122-a second bore section; 130-a flexible sleeve; 200-a bearing sleeve; 210-a plug-in part; 211-positioning grooves; 220-a limiting part; 221-positioning holes; 230-a barrier; 300-a rotary transformer; 400-a retainer ring; 500-hub bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

At present, when the bearing bush assembled to the centre frame of stator, the partial structure of bearing bush was pegged graft in the centre frame, the partial structure of bearing bush be located outside the centre frame and with the laminating of one side of centre frame, reuse bolt wear to establish the part and the spiro union that the bearing bush is located outside the centre frame on the centre frame, realize the fixed connection of bearing bush and centre frame. During the assembly, not only need counterpoint of bearing housing and centre frame, moreover, still need guarantee that the through-hole on the bearing housing is just right with the screw hole on the centre frame, just can pass through bolt fastening bearing housing and centre frame at last, so, assembly process is loaded down with trivial details, and intensity of labour is high, and assembly efficiency is low, has increased manufacturing cost.

Referring to fig. 1 to fig. 3, in view of this, the present embodiment provides a hub bearing 500 mounting structure, which is used for being mounted on a center frame 100 of a stator, and the mounting manner of the hub bearing 500 to the center frame 100 is simple and reliable, the fixing structure is simplified, the number of parts is reduced, the mounting process is simple and convenient, the mounting efficiency is improved, and the production cost is reduced.

Referring to fig. 1, in the present embodiment, the hub bearing 500 mounting structure includes:

a center frame 100 for mounting a stator core, the center frame 100 being provided with a fitting hole 110;

and a bearing sleeve 200 for assembling the hub bearing 500, wherein the bearing sleeve 200 is inserted into the assembling hole 110 and is in interference fit with the assembling hole 110.

In the hub bearing 500 mounting structure provided in this embodiment, the hub bearing 500 is assembled to the center frame 100 through the bearing housing 200. During the assembly, bearing housing 200 is pegged graft in the pilot hole 110 on centre frame 100, and bearing housing 200 is interference fit with pilot hole 110, thereby realize bearing housing 200 and centre frame 100's fixed connection, need not set up extra bolt and fix bearing housing 200 and centre frame 100, the use of bolt has been reduced, assembly bolt's process has been reduced, thereby it is simpler to make the assembly process, assembly step is more succinct, it is more convenient to assemble, improve assembly efficiency, and production cost is reduced.

Referring to fig. 2, in the present embodiment, optionally, a middle portion of the center frame 100 is provided with a mounting hole 110, the mounting hole 110 is configured as a cylindrical hole, the mounting hole 110 extends in a thickness direction of the center frame 100, that is, a central line direction of the center frame 100, and an aperture of the mounting hole 110 is set as required, which is not particularly limited in the present embodiment.

It should be understood that the fitting hole 110 may be not a cylindrical hole, but a square hole, etc., which can be fitted with the bearing housing 200.

Further, the center frame 100 has a first side 101 and a second side 102 in the thickness direction thereof, the center frame 100 is further provided with an avoiding hole 120 independent from the assembling hole 110, the avoiding hole 120 may be a cylindrical hole, a square cylindrical hole or a hole with other shapes, and the avoiding hole 120 penetrates through the center frame 100 in the thickness direction of the center frame 100.

Further, the avoiding hole 120 is provided with a first hole section 121 and a second hole section 122 which are connected, the cross sections of the first hole section 121 and the second hole section 122 are both circular, wherein the cross sections of the first hole section 121 and the second hole section 122 are the cross sections perpendicular to the axis of the avoiding hole 120. The first hole section 121 and the second hole section 122 are coaxially arranged, one side of the first hole section 121, which is far away from the second hole section 122, extends to the first side 101, one side of the second hole section 122, which is far away from the first hole section 121, extends to the second side 102, and the aperture of the first hole section 121 is smaller than that of the second hole section 122, so that an annular abutting surface surrounding the first hole section 121 is formed at the communication position of the first hole section 121 and the second hole section 122.

Further, a flexible sleeve 130 is disposed in the avoiding hole 120 of the center frame 100, the flexible sleeve 130 is inserted into the second hole section 122 from the second side 102 and abuts against the annular abutting surface, and a lumen of the flexible sleeve 130 is used for passing a power line and/or a signal line 001, etc.

It should be noted that the flexible sleeve 130 is a sponge sleeve, a rubber sleeve, or a foam sleeve, and can be deformed to clamp and position the power line passing through the flexible sleeve.

In addition, the flexible sleeve 130 is inserted into the avoiding hole 120, and the flexible sleeve 130 may be in interference fit with the avoiding hole 120, or an adhesive layer is formed between the flexible sleeve 130 and the hole wall of the avoiding hole 120, and the flexible sleeve 130 and the avoiding hole 120 are bonded and fixed by the adhesive layer.

It should be understood that the number and the positions of the avoiding holes 120 on the center frame 100 are set as required, and are not particularly limited in this embodiment.

In this embodiment, optionally, the second side 102 of the center frame 100 is further provided with a rotary transformer 300, and a power line led out from the rotary transformer 300 is inserted into the flexible sleeve 130. The rotary transformer 300 may be fixedly connected to the center frame 100 by screws, snaps, or the like.

In this embodiment, optionally, the bearing housing 200 includes a plug portion 210 and a limiting portion 220 connected to each other, and the plug portion 210 is in interference fit with the assembly hole 110; the position-limiting portion 220 protrudes from the outer peripheral surface of the insertion portion 210, and the position-limiting portion 220 abuts against the center frame 100 to limit the insertion depth of the insertion portion 210.

It should be noted that the insertion part 210 and the limiting part 220 can be integrally formed, so that the structure strength is high, and the insertion part is not easily damaged during use.

Further, the cross-sectional profile of the insertion part 210 is circular, the cross-sectional profile of the limiting part 220 is circular, and the limiting part 220 protrudes outwards from the outer circumferential surface of the insertion part 210 along the radial direction of the insertion part 210.

Further, a blocking portion 230 is disposed on a side of the insertion portion 210 away from the limiting portion 220, the blocking portion 230 is located on an inner peripheral wall of the insertion portion 210, and the blocking portion 230 is used for blocking the hub bearing 500 inserted into the bearing sleeve 200.

Optionally, the blocking portion 230 is of an annular structure, and when the hub bearing assembly is used, the contact area between the blocking portion and the hub bearing 500 is large, and the limiting effect is good.

Further, the inner peripheral wall of the insertion part 210 is provided with a positioning groove 211, and the positioning groove 211 extends along the circumferential direction of the insertion part 210 and forms an annular structure.

Referring to fig. 3, in the present embodiment, optionally, a positioning hole 221 is formed on the limiting portion 220, the positioning hole 221 is communicated with the avoiding hole 120 on the central frame 100, and the power line passing through the flexible sleeve 130 can pass through the positioning hole 221, so that the position of the power line is more stable.

It should be noted that the number of the positioning holes 221 is plural, and the plurality of positioning holes 221 are uniformly arranged at intervals in the circumferential direction of the limiting portion 220, so that power lines at different positions can be penetrated through, and a function of fixing a plurality of power lines is achieved.

In the hub bearing 500 mounting structure provided by this embodiment, the bearing sleeve 200 is inserted into the mounting hole 110 of the center frame 100, and the bearing sleeve 200 is in interference fit with the mounting hole 110. The bearing sleeve 200 and the center frame 100 are not fixed by fixing parts such as bolts, so that the fixing structure is simplified, the use of the fixing parts is saved, and the cost is reduced. Meanwhile, the assembling process is simplified, the assembling difficulty is reduced, the assembling efficiency is improved, and the production cost is reduced.

The embodiment further provides a hub motor, which comprises a retainer ring 400, a hub bearing 500 and the hub bearing 500 mounting structure mentioned in the above embodiment, wherein the hub bearing 500 is embedded in the bearing sleeve 200, the retainer ring 400 is clamped in the positioning groove 211, the retainer ring 400 and the limiting part 220 jointly position the hub bearing 500, and the movement of the hub bearing 500 in the axial direction of the bearing sleeve 200 is limited.

During the assembly, can be earlier with bearing housing 200 and pilot hole 110 interference fit, then, inlay hub bearing 500 and establish in bearing housing 200, again with retaining ring 400 joint in constant head tank 211.

The in-wheel motor that this embodiment provided, assembly process is simple, low in labor strength, and is efficient, with low costs.

The embodiment also provides an electric automobile, including foretell in-wheel motor, electric automobile's assembly efficiency is high, and low in production cost is got.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hub bearing mounting structure, comprising:

the central frame is used for mounting the stator core and is provided with a mounting hole;

2. The hub bearing mounting structure of claim 1, wherein:

the bearing sleeve comprises a plug-in part and a limiting part which are connected, and the plug-in part is in interference fit with the assembling hole; the limiting part protrudes out of the peripheral surface of the insertion part, and the limiting part is abutted against the central frame so as to limit the insertion depth of the insertion part.

3. The hub bearing mounting structure of claim 2, wherein:

the limiting part is of an annular structure arranged around the central line of the inserting part.

4. The hub bearing mounting structure of claim 2, wherein:

and the limiting part is provided with a positioning hole for the signal wire to penetrate through.

5. The hub bearing mounting structure of claim 4, wherein:

the number of the positioning holes is multiple, and the positioning holes are arranged at intervals in the circumferential direction of the inserting part.

6. The hub bearing mounting structure of claim 1, wherein:

the hub bearing mounting structure further comprises a sealing ring, wherein the sealing ring is sleeved outside the bearing sleeve and is positioned in the assembling hole to seal the connecting position of the bearing sleeve and the central frame.

7. The hub bearing mounting structure of claim 6, wherein:

the internal perisporium of pilot hole is equipped with the constant head tank, the sealing washer is located in the constant head tank.

8. The hub bearing mounting structure of claim 1, wherein:

the center frame is provided with a dodging hole, a flexible sleeve is arranged in the dodging hole and used for the signal line to penetrate through and position the signal line.

9. An in-wheel motor, characterized in that, the in-wheel motor includes:

a hub bearing and a hub bearing mounting structure of any one of claims 1-8, the hub bearing being fitted within the bearing sleeve.

10. An electric vehicle, characterized in that the electric vehicle comprises:

the in-wheel motor of claim 9.