CN201896853U

CN201896853U - Stepped rotating shaft

Info

Publication number: CN201896853U
Application number: CN2010206746003U
Authority: CN
Inventors: 季明浩; 叶善培; 沈剑
Original assignee: Shanghai Maritime University
Current assignee: Shanghai Maritime University
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2011-07-13
Anticipated expiration: 2020-12-22

Abstract

The utility model discloses a stepped rotating shaft which comprises a rotating shaft body. A stepped spacing ring is arranged on the rotating shaft body. The thickness of the spacing ring is 5 mm, and the diameter of the spacing ring is 0.2 to 0.3 mm larger than that of the rotating shaft body. The stepped rotating shaft abandons a polish rod structure of the traditional rotating shaft, and the stepped spacing ring is additionally arranged on a fixed operating surface of the rotating shaft body (namely the periphery of the rotating shaft body), so that the rotating shaft enables that a rotor component can be effectively pressed into the rotating shaft for accurate positioning, and a pressing jig structure is not required to be changed; and after detection, not only has the pressed rotating shaft component good tightness, but also the rotor component is accurately positioned on the rotating shaft, which is beneficial to the later final assembly.

Description

The step type rotating shaft

Technical field

The utility model relates to rotating shaft, especially relates to a kind of step type rotating shaft.

Background technique

In press-fiting in the process of small-sized, microelectromechanicpositioning product, usually use frock that assemblies such as rotor are pressed in the rotating shaft, but position-limit mechanism is not set owing to be pressed into frock self, do not have locating function, so usually cause rotor assembly " sideslip " in being pressed into traveling process, be rotor assembly off-design size, cause the installation of rotor assembly not meet fitted position, influence the later stage general assembly.

If a kind of like this rotating shaft can be arranged, have limit function, and need not through special or complicated technology in the processing, only need simple just processing directly can use for assembling, this reduces manufacturing and administration cost and will have remarkable result improving work efficiency.

The model utility content

The purpose of this utility model provides a kind of step type rotating shaft, plays the fixed connection effect when in products such as middle-size and small-size, micromachine rotor part being installed.

The utility model is that the technological scheme that its technical problem of solution is adopted is,

The step type rotating shaft comprises the rotating shaft body, and described rotating shaft body is provided with a step-like limited ring, this limited ring be one with the annulus of the concentricity axle of rotating shaft body.

The thickness of described limited ring is 5mm, and the diameter of this limited ring is than the big 0.2～0.3mm of diameter of rotating shaft body.

The beneficial effects of the utility model are, it has abandoned the polished rod structure of original traditional rotating shaft, be to increase by a step-like limited ring on the circumferential surface of rotating shaft body in the steady job profile of rotating shaft body, adopting this rotating shaft can effectively rotor assembly be pressed in the rotating shaft accurately locatees, need not change and be pressed into tool structure, after testing, not only tightness is good to extrude the rotating assembly that comes like this, and the accurate positioning of rotor assembly in rotating shaft, help the later stage general assembly.

Description of drawings

Fig. 1 is the structural representation of the utility model step type rotating shaft;

Fig. 2 is the cross sectional representation of step type rotating shaft;

Fig. 3 is step type rotating shaft and rotor assembly assembling schematic representation.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 1 and Figure 2, step type rotating shaft provided by the utility model comprises rotating shaft body 1, and rotating shaft body 1 is provided with step-like limited ring 2.

The thickness of limited ring 2 is 5mm, and the diameter D of limited ring 2 is than the big 0.2～0.3mm of diameter d of rotating shaft body 1.

As shown in Figure 3, during use, the step type rotating shaft is pressed in the through hole of rotor 3 with external force such as pneumatic press, hydraulic presses.

The diameter of rotating shaft body is than the big 0.2～0.3mm of clear size of opening, and after this step type rotating shaft was pressed into the through hole of rotor, through hole countershaft body had suitable tension force like this, guarantees fastening and accurate positioning between rotor assembly and the rotating shaft body.

The material of making this step type rotating shaft is widely used in conventional engineering material, as 40,45,50 steel etc.

Simple, the easily processing of this step type turning shaft structure is fit to product small-sized, the microelectromechanicpositioning product very much.

This step type rotating shaft is simple without self structure, processing technology is easy, and need not by adding system auxiliary hole/groove separately on the fixing with it part, realize locating/spacing, location/position-limit mechanism on the rotating shaft body is that described limited ring is step-like, when rotating shaft is pressed into the rotor assembly through hole be like this, rotor assembly can directly be positioned at the position of designing requirement, guarantees quality of processing.

This step type rotating shaft process structure is simple, low cost of manufacture, and processability is good, and the rotor assembly after press-fiting adheres to specification, the reliability height.

The polished rod structure of original traditional rotating shaft has been abandoned in step type rotating shaft provided by the utility model, be to increase by a step-like limited ring on the circumferential surface of rotating shaft body in the steady job profile of rotating shaft body, adopting this rotating shaft can effectively rotor assembly be pressed in the rotating shaft accurately locatees, need not to change and be pressed into tool structure, after testing, not only tightness is good to extrude the rotating assembly that comes like this, and the accurate positioning of rotor assembly in rotating shaft, helps the later stage general assembly.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. step type rotating shaft comprises the rotating shaft body, it is characterized in that, described rotating shaft body is provided with a step-like limited ring.

2. step type rotating shaft according to claim 1 is characterized in that, the thickness of described limited ring is 5mm, and the diameter of limited ring is than the big 0.2～0.3mm of diameter of rotating shaft body.