CN219717966U - Ceramic shaft - Google Patents

Abstract

The utility model provides a ceramic shaft which comprises a ceramic shaft body, wherein the ceramic shaft body is of a hollow circular tube structure, at least one matching groove is formed in the outer peripheral surface of the ceramic shaft body, the groove bottom of the matching groove is a cambered surface which is concentric with the outer peripheral surface of the ceramic shaft body, two side walls of the groove bottom extending direction of the matching groove are groove walls, and the planes of the groove walls on the two sides are not parallel to the axis of the ceramic shaft body. The utility model has reasonable structural design, the bottom of the matching groove adopts the arc surface design, the arc surface of the bottom of the matching groove is the same as the radian of the peripheral surface of the ceramic shaft and is in concentric design, the whole body adopts powder compaction sintering molding, the processing process is convenient and rapid, the yield is high, and the production and use cost is effectively reduced; meanwhile, the groove wall of the matching groove and the axis of the ceramic shaft are in non-parallel design, and when the rotor rotates positively and reversely, the groove wall can be matched with the rotor part well in limit, so that the slipping phenomenon can not occur, and the use reliability of the ceramic shaft is ensured.

Description

Ceramic shaft

Technical Field

The utility model relates to the technical field of motor shafts, in particular to a ceramic shaft.

Background

The electric motor converts electrical energy into mechanical motion that produces high-speed rotational motion. The ceramic shaft ensures smooth high-speed operation of the motor rotor. In the existing conventional rotor ceramic shaft production design, a ceramic shaft main body adopts a hollow tube design, and as shown in fig. 4 and 5, a matching groove is required to be machined on the outer peripheral surface of the ceramic shaft for positioning and matching installation of rotor components. The groove bottom of the matching groove is a plane relative to the arc-shaped structure of the outer peripheral surface of the ceramic shaft, namely the matching groove is a flat bottom groove. And grinding the flat bottom groove by adopting a grinding wheel during processing. When the grinding wheel is used for grinding, the ceramic shaft main body is a hollow tube, and meanwhile, the feeding depth and the force of grinding are required to be controlled in the grinding process due to the material characteristics of ceramic, otherwise, the ceramic shaft is easy to generate hidden cracks, and the ceramic shaft is easy to generate fracture risks under the influence of stress. The ceramic shaft adopting the flat bottom groove design has the problems of high processing loss and high rejection rate in processing, and the production and use cost of the ceramic shaft is increased. Therefore, how to carry out further structural improvement to the ceramic shaft, so that the ceramic shaft can meet the use requirement and can be conveniently processed, and the ceramic shaft becomes the key point of the current design.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to overcome the defects of the prior art, the utility model provides the ceramic shaft, which is used for further improving the design of the matching groove, so that the ceramic shaft can be firmly matched with the rotor component in a positioning way during installation, is not easy to slip, can effectively simplify the processing technology, reduces the processing rejection rate and reduces the production and use cost.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a ceramic shaft, includes the ceramic shaft body, the ceramic shaft body be hollow circular tube structure, it has at least one cooperation groove to open on the outer peripheral face of ceramic shaft body, cooperation groove tank bottom be the cambered surface, this cambered surface is concentric with ceramic shaft body outer peripheral face, cooperation groove tank bottom extending direction's both sides lateral wall be the cell wall, both sides cell wall place plane is not parallel with ceramic shaft body axis.

In the scheme, for the flat bottom groove design of traditional ceramic shaft, the tank bottom of cooperation groove is with the concentric cambered surface of ceramic shaft body outer peripheral face to correspond the design and not with the parallel cell wall of ceramic shaft body axis, cooperation groove can be convenient for the cooperation embedding location of rotor part, because the tank bottom is the cambered surface, whole cooperation groove is the circumference along the tank bottom and corresponds the cooperation with rotor part, no matter the ceramic shaft uses the axis to rotate as the center, always has one side cell wall to stop spacing to rotor part, has effectively guaranteed that ceramic shaft and rotor part's location cooperation is firm, can not take place the slippage risk.

Further, the planes of the groove walls on the two sides of the matching groove are parallel, when the groove walls on the two sides are connected through the arc-shaped end faces, the matching groove forms a slotted hole relative to the projection of the plane of the axis of the ceramic shaft, the structural design is simple and reasonable, and the rotor component and the matching groove can be conveniently and effectively embedded and matched for positioning.

Furthermore, the surface of the ceramic shaft body is provided with at least two groups of matching grooves which are symmetrically distributed relative to the axis of the ceramic shaft body. The matching grooves are symmetrically arranged on two sides of the axis of the ceramic shaft body in groups respectively, so that the ceramic shaft is matched and positioned from two sides of the ceramic shaft body simultaneously, the positioning reliability is further improved, and the slipping risk is avoided.

Furthermore, each group of matching grooves comprises two matching grooves which are distributed in parallel at intervals in the same group.

Preferably, the ceramic shaft body is formed by powder compaction and sintering. Compared with the processing mode of grinding by adopting a grinding wheel, the powder compacting, sintering and forming can form an effective matching groove at one time, avoid damage to the ceramic shaft body in the processing and improve the processing yield.

The ceramic shaft has the beneficial effects that the structural design is reasonable, the groove bottom of the matching groove adopts the arc surface design, the arc surface of the groove bottom is identical to the arc surface of the outer circumferential surface of the ceramic shaft and is concentrically designed, the ceramic shaft is integrally compacted and sintered by powder, the processing process is convenient and rapid, the yield is high, and the production and use cost is effectively reduced; meanwhile, the groove walls of the matching grooves are designed in a non-parallel mode with the axis of the ceramic shaft, namely, the matching grooves extend obliquely relative to the axis of the ceramic shaft, after the ceramic shaft and the rotor component are matched and installed, when the rotor rotates positively and reversely, the groove walls can be matched with the rotor component well, the slipping phenomenon cannot occur, and the use reliability of the ceramic shaft is guaranteed.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is a perspective view of a first embodiment of the present utility model.

Fig. 2 is a perspective view of a second embodiment of the present utility model.

Fig. 3 is a front view of a second embodiment of the present utility model.

Fig. 4 is a perspective view of a conventional ceramic shaft.

Fig. 5 is a front view of a conventional ceramic shaft.

In the figure, 1, a ceramic shaft body 2, a matching groove 2-1, a groove wall 2-2, a groove bottom 3 and a flat bottom groove.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only those features which are relevant to the utility model, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Embodiment one:

a ceramic shaft as shown in fig. 1 is a first embodiment of the present utility model.

The ceramic shaft comprises a ceramic shaft body 1, wherein the ceramic shaft body 1 is of a hollow circular tube structure, and end faces at two ends of the hollow circular tube are connected with the outer peripheral face in a chamfering mode. The peripheral surface 1 of the ceramic shaft body is provided with a matching groove 2. The ceramic shaft is formed by powder compaction and sintering, the matching groove 2 is formed on the surface of the ceramic shaft body 1 in one step during sintering, and compared with the traditional ceramic shaft which adopts grinding wheels to grind and form the flat bottom groove 3, the ceramic shaft can avoid damage to the ceramic shaft body 1 during processing, simplify the processing procedure and improve the processing yield.

Specifically, the groove bottom 2-2 of the matching groove 2 is a cambered surface, the cambered surface is concentric with the peripheral surface of the ceramic shaft body 1, the side walls on two sides of the extending direction of the groove bottom 2-2 of the matching groove 2 are groove walls 2-1, the groove walls 2-1 on two sides are connected through arc end surfaces, the planes of the groove walls 2-1 on two sides are parallel, and the groove walls 2-1 on two sides are not parallel to the axis of the ceramic shaft body 1. The projection of the surface of the matching groove 2 corresponding to the axis of the ceramic shaft forms a slotted hole, and the rotor component and the matching groove 2 can be conveniently and effectively embedded and matched for positioning.

Compared with the design of the flat bottom groove 3 of the traditional ceramic shaft, the inner circumference of the matching groove 2 of the first embodiment is closed, and the matching groove is not as same as the flat bottom groove 3, and two ends of the matching groove are provided with openings. Therefore, after the ceramic shaft and the rotor component are assembled, the rotor component and the matching groove 2 are well matched in shape, and firstly, a good matching structure is formed, so that the ceramic shaft rotor component has a good anti-slip effect. Secondly, due to the fact that the groove wall 2-1 which is not parallel to the axis of the ceramic shaft body 1 is designed, when the ceramic shaft rotates by taking the axis as the center, no matter the ceramic shaft rotates in the positive and negative directions, the groove wall 2-1 on one side always can block and limit the rotor part, positioning and matching of the ceramic shaft and the rotor part are effectively guaranteed to be stable, and the slip risk cannot occur.

Embodiment two:

a ceramic shaft as shown in fig. 2 and 3 is a second embodiment of the present utility model.

Embodiment two on the basis of embodiment one, the number and arrangement of the fitting grooves 2 are further preferably designed.

Specifically, the surface of the ceramic shaft body 1 is provided with two groups of matching grooves 2, and the two groups of matching grooves 2 are symmetrically distributed relative to the axis of the ceramic shaft body 1. Each group of the matching grooves 2 comprises two matching grooves 2 which are distributed in parallel at intervals.

The ceramic shaft body 1 axis both sides are equipped with cooperation groove 2 in group symmetry respectively, are convenient for carry out the cooperation location to the ceramic shaft simultaneously from ceramic shaft body 1 both sides, further improve location reliability, avoid the slippage risk. The number of the matching grooves 2 in each group of matching grooves 2 is two, the matching grooves 2 are distributed in parallel, in the same group of matching grooves 2, the limiting and positioning effects of the matching grooves 2 can be further improved from the axial direction of the ceramic shaft body 1, the meshing slipping of the rotor component and the ceramic shaft is avoided, and the use reliability is further improved.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (5)

1. Ceramic shaft, comprising a ceramic shaft body (1), characterized in that: the ceramic shaft body (1) is of a hollow circular tube structure, at least one matching groove (2) is formed in the outer peripheral surface of the ceramic shaft body (1), the groove bottom (2-2) of the matching groove (2) is an arc surface, the arc surface is concentric with the outer peripheral surface of the ceramic shaft body (1), two side walls of the groove bottom (2-2) of the matching groove in the extending direction are groove walls (2-1), and the planes of the groove walls (2-1) on the two sides are not parallel to the axis of the ceramic shaft body (1).

2. A ceramic shaft as defined in claim 1, wherein: the planes of the groove walls (2-1) on the two sides of the matching groove (2) are parallel.

3. A ceramic shaft as defined in claim 2, wherein: the surface of the ceramic shaft body (1) is provided with at least two groups of matching grooves (2), and the two groups of matching grooves (2) are symmetrically distributed relative to the axis of the ceramic shaft body (1).

4. A ceramic shaft as claimed in claim 3, wherein: each group of matching grooves (2) comprises two matching grooves (2), and the matching grooves (2) in the same group are distributed in parallel at intervals.

5. A ceramic shaft as defined in claim 1, wherein: the ceramic shaft body (1) is formed by compacting, sintering and molding powder.