Friction plate component for chain hoist and press fitting specially used for film laminating bearing

Abstract

The invention discloses a friction plate component for a chain hoist and a press fitting specially used for a film laminating bearing, belonging to the technical field of chain hoist part assembly. The friction plate component comprises an upper mold, a bottom plate, a positioning core mold base fixed on the bottom plate and a positioning core mold, the bottom of the upper mold is provided with anupper mold blind hole and an upper mold step, the positioning core mold base is provided with a mold base step hole and a mold base top surface for shelving the friction plate component, the positioning core mold is provided with a core mold neck part, a core mold shoulder part and a core mold main body part for coating the friction plate component, the core mold shoulder part and the core mold main body part transitionally form a core mold table shoulder for placing the film laminating bearing, the core mold main body part fits in the mold base step hole in a sliding mode, the core mold mainbody part is supported on the bottom plate through a pressure spring, the core mold neck part is sleeved by the upper mold blind hole, the bottom surface of the upper mold is in contact with the coremold shoulder part, and the position of the upper mold step is just in interval correspondence to the top surface of the mold base. After adopting the technical scheme, the bearing press fitting depth is easy to control, after press fitting and demolding, the assembly parts are convenient to take away, the press fitting self-positioning is accurate, and the assembly part positioning is reliable.

Description

【Technical field】 [0001] The invention relates to a special press-fitting of a friction plate assembly for a manual hoist and a film-coated bearing, and belongs to the technical field of assembly of manual hoist parts. 【Background technique】 [0002] The friction plate assembly and film-coated bearing are the standard parts of the known manual hoist, wherein the friction plate assembly is composed of a ratchet and an upper friction plate and a lower friction plate sintered on the upper and lower end surfaces of the ratchet. The assembly of the manual hoist involves press-fitting the film-coated bearing to the friction plate assembly. However, the existing press-fitting device has the disadvantage that the film-coated bearing is over-pressed or under-pressurized and the depth of the press-fitting is not easy to control. When the film-coated bearing is not pressed in place However, the upper end of the coated bearing does not fully enter the center hole of the ratchet. When th...

AI Technical Summary

Problems solved by technology

The assembly of the manual hoist involves press-fitting the film-coated bearing to the friction plate assembly. However, the existing press-fitting device has the disadvantage that the film-coated bearing is over-pressed or under-pressurized and the depth of the press-fitting is not easy to control. When the film-coated bearing is not pressed in place However, the upper end of the coated bearing does not fully enter the center hole of the ratchet. When the coated bearing is over-pressed, the lower end of the coated bearing will be exposed from the center hole of the ratchet, and the friction plate assembly is easily damaged, resulting in The film bearing is deformed. In view of this, it is necessary to improve the existing press-fitting device

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