End cover for medical compressor core and manufacturing method thereof

Abstract

The invention discloses an end cover for a medical compressor core. The end cover comprises an end cover body manufactured from nonferrous metal through die casting. A bearing installation hole is formed in the middle of the end cover body. An annular flange is arranged on the edge of the bottom of the bearing installation hole. A bearing connected with a motor is arranged in the bearing installation hole. An engineering plastic protective sleeve with wear resistance, compression resistance and damping effects is arranged in the gap between the bearing and the side wall of the bearing installation hole. The end cover body is formed in a die casting mode. The end cover formed through die casting of nonferrous metal keeps the advantages of rigidity and strength of an original metal end cover, and the engineering plastic protective sleeve is arranged in the gap between the bearing and the side wall of the bearing installation hole, so that the end cover keeps the advantages of the micro buffer elastic effect and impact relief of a plastic end cover in the market, and has the advantage of rigidity of the metal end cover. The engineering plastic protective sleeve can prevent a gap from being produced between the bearing and the wall of the bearing installation hole, and consistency of compactness between the bearing and the wall of the bearing installation hole of each product can be guaranteed.

Description

technical field [0001] The invention relates to a medical compressor, in particular to an end cover for a medical compressor core. Background technique [0002] In a compressor, it is usually necessary to use a metal end cover to rotationally connect the bearing to a shaded pole motor (ie, a shaded pole motor). At present, the traditional shaded pole motor compressor metal end cover on the market, such as figure 1 and figure 2 As shown, the metal end cap 100 is generally integrally formed of metal, and the two ends of the metal end cap 100 are provided with positioning holes 101 , and the center of the metal end cap 100 is provided with a bearing inner hole 103 for assembling the bearing 102 . [0003] The disadvantages of the metal end cover of the above-mentioned shaded pole motor compressor are: 1. All of them are integrally formed of metal, the positions of the three holes cannot be guaranteed, and the consistency is poor; 2. The assembly of the metal end cover and th...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the metal end cover of the above-mentioned shaded pole motor compressor are: 1. All of them are integrally formed of metal, the positions of the three holes cannot be guaranteed, and the consistency is poor; 2. The assembly of the metal end cover and the bearing needs interference fit, so that the assembly The processing accuracy of the inner hole 103 of the bearing is very high, and special bearing assembly and pressing equipment is required for assembly; the cost is increased but the accuracy consistency of the processed hole cannot be guaranteed

3. After the bearing is assembled, if there is a gap or transition fit between the bearing and the inner hole of the bearing, the bearing will be subjected to radial force for a long time during work, resulting in a gradual increase in the fit gap between the bearing and the end cover, which will cause the motor to The working noise increases, and even the metal end cover is damaged or scrapped; finally, the bearing is separated from the end cover, so that the motor cannot run and is burned

[0004] There is also a kind of end cover that is integrally injected with engineering glue. This kind of end cover made of engineering glue can solve the defects caused by the interference fit of the above-mentioned metal end cover bearing, and can solve the problem of the gap between the bearing and the side wall of the bearing hole. , however, the rigidity of this end cap is not enough, and it is easy to deform under the action of a certain external force. Therefore, it is necessary to improve the above two end caps

Images