CN213331654U

CN213331654U - Rotor rotating shaft and rotor assembly

Info

Publication number: CN213331654U
Application number: CN202021879051.3U
Authority: CN
Inventors: 朱彬; 余文; 谢宾宾; 贾濠宇; 池华; 许振好; 裴洋
Original assignee: Ruili Group Ruian Auto Parts Co Ltd
Current assignee: Ruili Group Ruian Auto Parts Co Ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-06-01
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses a rotor pivot and rotor subassembly, rotor subassembly include the rotor pivot, the rotor pivot include the pivot body and form in the deep groove ball bearing structure of pivot body lower extreme, deep groove ball bearing structure is used for right pivot body axial is spacing. By forming the deep groove ball bearing structure at the tail end of the rotating shaft body, when the rotor is influenced by the pressure and the magnetic force of the inner cavity and the outer cavity in the speed regulation and/or start and stop processes of the electronic water pump, the rotating shaft body and the deep groove ball bearing structure can still stably rotate relatively, so that repeated separation and impact fitting between the rotating shaft body and the deep groove ball bearing structure are avoided, and the rotating shaft cannot move; meanwhile, the deep groove ball bearing structure is installed in contact with the installation surface, so that a gap between the rotor rotating shaft installed through the shaft sleeve and the installation surface in the prior art is avoided, and the play of the rotor rotating shaft in the operation process is further avoided.

Description

Rotor rotating shaft and rotor assembly

Technical Field

The utility model relates to a rotor pivot technical field, concretely relates to rotor pivot and use rotor subassembly of this rotor pivot.

Background

At present, an electronic water pump for an automobile is mainly a direct-current brushless electronic water pump, generally driven by an inner water channel brushless motor, is internally provided with a ceramic sliding bearing for bearing and supporting, water is used as a lubricating medium, and a shaft sleeve is axially limited by a rotating shaft for unidirectional limitation. The Chinese utility model with the bulletin number of CN210371212U provides an automotive electronic water pump, which comprises a water pump shell, an isolation sheath, a rotor assembly, a stator and a rear cover, wherein the water pump shell comprises a cover body and a cylinder body, and a first liquid hole is formed in the cover body; the isolation sheath is sleeved outside the rotor assembly in the stator cavity, and the top end of the isolation sheath is hermetically connected with the water pump shell; the rotor assembly comprises a rotor shaft and a rotor body, a gap is formed between the rotor body and the inner wall of the isolation sheath, the rotor shaft is provided with a first through hole which is formed in the axial direction, the top of the rotor shaft penetrates out of the cover body, and the rotor shaft is limited, supported and supported through the upper shaft sleeve and the lower shaft sleeve. Therefore, a gap exists between the rear end of a rotor shaft of the electronic water pump and the rear cover, and in addition, the gap and the limiting bearing mode of the shaft sleeve are adopted, when the water pump works, especially in the speed regulation and/or start and stop processes, the rotor can be influenced by the pressure difference value of the inner cavity and the outer cavity and the magnetic pull force of the stator together, a friction working mode of repeated separation and impact fitting is formed between the rotor shaft and the shaft sleeve, the failure risk of the shaft sleeve is increased, the rotor shaft is easy to shift in the axial direction, and the running smoothness of the whole machine is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a rotor rotating shaft, it includes: the rotor rotating shaft is characterized by comprising a rotating shaft body and a deep groove ball bearing structure formed at the lower end of the rotating shaft body, wherein the deep groove ball bearing structure is used for limiting the rotating shaft body in the axial direction.

Further, the deep groove ball bearing structure comprises a bearing outer ring and a bearing inner ring formed at the end part of the rotating shaft body, and a plurality of rollers are arranged between the bearing outer ring and the bearing inner ring.

Furthermore, a plurality of the balls are arranged through a retainer.

Furthermore, a water tank is arranged at the end part of the deep groove ball bearing structure.

Further, a spiral groove is formed in the part, matched with the sliding bearing, of the rotating shaft body, a spiral channel is formed between the spiral groove and the inner surface of the sliding bearing, and the spiral channel is used for communicating the impeller cavity and the rotor cavity.

Further, the end portion of the rotating shaft body close to the spiral groove forms a mounting end.

Further, the rotating shaft body is also provided with an axial through hole.

Further, the rotating shaft body is also provided with an axial flow impeller

Further, the outer diameter of the mounting end is smaller than the outer diameter of the rotating shaft body.

The utility model also provides a rotor subassembly, including above-mentioned rotor shaft.

Compared with the prior art, the technical scheme of the utility model have following advantage:

(1) the utility model provides a rotor rotating shaft has changed among the prior art and has carried out the normal way that spacing bears the weight of and support at pivot tail end installation axle sleeve, through forming deep groove ball bearing structure at pivot body tail end, when electronic water pump in the process of speed governing and/or opening and stopping, the rotor is when receiving interior cavity pressure and magnetic force influence, still can stable relative rotation between pivot body and the deep groove ball bearing structure, avoided the repeated separation and the striking laminating between the two, and then make the pivot be difficult to take place the axial float; meanwhile, the deep groove ball bearing structure is installed in contact with the installation surface, so that a gap between the rotor rotating shaft installed through the shaft sleeve and the installation surface in the prior art is avoided, and the play of the rotor rotating shaft in the operation process is further avoided.

(2) The utility model provides a rotor shaft through with pivot body and bearing inner race integrated into one piece design, makes the laminating degree between pivot body and the deep groove ball bearing structure higher, plays better stable effect.

(3) The utility model provides a rotor shaft forms spiral groove through on the pivot body with slide bearing complex position, forms helical flute between helical flute and the slide bearing internal surface for water in the impeller intracavity can flow into the rotor intracavity through helical flute, and rivers take away the tiny gravel between rotor shaft and the slide bearing or the impurity that wearing and tearing produced out when spiral flute, thereby reduce the wearing and tearing between rotor shaft and the slide bearing, are favorable to prolonging electronic water pump life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of the overall structure of a rotor shaft and a rotor assembly according to the present invention;

fig. 2 is a schematic structural diagram of the rotor shaft and rotor assembly of the present invention applied to an electronic water pump;

the reference numbers in the figures denote: 1-a water inlet; 3-a shell; 4-a stator; 5-a rotor block; 6-bearing inner race; 7-an isolation sleeve; 8-rear cover plate; 11-a roller; 12-a cage; 13-bearing outer race; 18-an axial flow impeller; 19-a shaft body; 21-a sliding bearing; 23-a water pump impeller; 24-an impeller cavity; 40-a spiral groove; 43-a rotor cavity; 48-a first raceway; 49-a second raceway; 50-roller mounting groove; 51-a through hole; 52-mounting end.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The embodiments in the present invention, other embodiments obtained by a person of ordinary skill in the art without creative work, all belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-2, the present embodiment discloses a rotor assembly including a rotor shaft and a rotor block 5.

The rotor rotating shaft comprises a rotating shaft body 19 and a deep groove ball bearing structure formed at the lower end of the rotating shaft body 19, the rotating shaft body 19 is fixedly connected with the rotor block 5, the specific connection mode is not limited, the connection mode between the rotating shaft body 19 and the rotor block 5 in the prior art can be adopted, the rotor rotating shaft is preferably fixedly connected in an interference fit mode in the embodiment, and the deep groove ball bearing structure is used for axially limiting the rotating shaft body 19; specifically, the deep groove ball bearing structure includes a bearing outer ring 13 and a bearing inner ring 6, the bearing inner ring 6 is formed at an end portion of the rotating shaft body 19, in this embodiment, the bearing inner ring 6 and the rotating shaft body 19 are integrally formed, a roller mounting groove 50 is formed between the bearing outer ring 13 and the rotating shaft body 19, a first raceway 48 is formed on a surface of the bearing inner ring 6, a second raceway 49 is formed on an inner wall of the bearing outer ring 13, and a plurality of rollers 11 are disposed in the roller mounting groove 50 and respectively abut against the first raceway 48 and the second raceway 49. Further, a plurality of rollers 11 are installed and arranged through a retainer 12, and the retainer 12 is used for spacing the rollers 11 at equal intervals, so that the rollers 11 are uniformly distributed on the circumferences of the first and

second ball paths

48 and 49 to prevent the rollers 11 from colliding and rubbing with each other during operation.

Further, the lower end of the deep groove ball bearing structure is provided with a water tank, and the shape and structure of the water tank are not particularly limited as long as water flow can be achieved, and in the embodiment, water flow passes through the water tank from the bearing outer ring 13, or water flow passes between the rollers 11, or both, which is determined according to the bottom mounting surface structure of the deep groove ball bearing structure. Preferably, the mounting surface is a concave arc surface, and the deep groove ball bearing structure is supported on the periphery of the concave arc surface.

Further, the part of the rotating shaft body 19, which is matched with the sliding bearing 21, is formed with a spiral groove 40, the specific structure of the spiral groove 40 is not limited, and the position of the spiral groove 40 corresponds to the position of the sliding bearing 21 after the installation, in this embodiment, the cross section of the spiral groove 40 is in a semicircular shape, a spiral channel is formed between the spiral groove 40 and the inner surface of the sliding bearing 21, the spiral channel is used for communicating the impeller cavity 24 and the rotor cavity 43, and water in the impeller cavity 43 flows into the rotor cavity 43 through the spiral channel.

Further, an installation end 52 is formed at an end portion of the rotating shaft body 19 close to the spiral groove 40, the installation end 52 is fixedly connected with the water pump impeller 23 arranged in the impeller cavity 24, specifically, an external thread is formed on the installation end 52, an internal thread is formed in the water pump impeller 23, the installation end 52 is fixedly connected with the water pump impeller 23 by a thread, and further, an outer diameter of the installation end 52 is smaller than an outer diameter of the rotating shaft body 19.

Further, the rotating shaft body 19 is further provided with an axial through hole 51, and water flow in the water tank can enter the through hole 51 from the bottom end of the through hole 51.

Further, an axial flow impeller 18 is arranged on the rotating shaft body 19 at a position close to the deep groove ball bearing structure, the axial flow impeller 18 is fixedly connected to the rotating shaft body 19, and by arranging the axial flow impeller 18, water at the lower part of the rotor cavity 43 can move quickly, so that the water can enter the through hole 51 quickly and efficiently.

As shown in fig. 2, in operation, the stator 4 generates a magnetic field after being energized to drive the rotor block 5 and the rotating shaft body 19 to rotate, and the bearing inner ring 6 also rotates; the water flow flows into the impeller cavity 24 from the water inlet 1, then flows into the cooling cavity 43 in the isolation sleeve 7 after flowing through at least the spiral channel formed between the spiral groove 40 and the sliding bearing 21, then continues to flow downwards from the gap between the rotor 5 and the isolation sleeve 7, then flows into the water tank through the roller mounting groove 50 and/or the outside of the bearing outer ring 13, finally flows into the shaft hole 51 in the rotating shaft body 19 and then is discharged outwards.

It should be noted that the rotor shaft and rotor assembly of the present invention are not limited to be used in an electronic water pump, and can also be used in other pump valve structures requiring the rotor shaft and rotor assembly.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The rotor rotating shaft is characterized by comprising a rotating shaft body and a deep groove ball bearing structure formed at the lower end of the rotating shaft body, wherein the deep groove ball bearing structure is used for limiting the rotating shaft body in the axial direction.

2. The rotor spindle of claim 1, wherein the deep groove ball bearing structure includes an outer bearing ring and an inner bearing ring formed at an end of the spindle body, the outer bearing ring and the inner bearing ring having a plurality of rollers mounted therebetween.

3. The rotor shaft of claim 2, wherein a plurality of said rollers are mounted between each other by a cage.

4. The rotor shaft of any one of claims 1-3, wherein a water groove is provided at an end of the deep groove ball bearing structure.

5. The rotor shaft of claim 4 wherein the portion of the shaft body that engages the sliding bearing forms a spiral groove, the spiral groove and the inner surface of the sliding bearing forming a spiral channel therebetween, the spiral channel communicating the impeller cavity and the rotor cavity.

6. A rotor shaft according to claim 5, wherein an end portion of the shaft body adjacent to the spiral groove forms a mounting end.

7. A rotor shaft according to claim 5, wherein the shaft body is further provided with an axial through hole.

8. The rotor shaft of claim 6, wherein said shaft body is further provided with an axial flow impeller.

9. The rotor spindle of claim 6, wherein an outer diameter of the mounting end is smaller than an outer diameter of the spindle body.

10. A rotor assembly comprising a rotor shaft according to any one of claims 1 to 9.