CN2277089Y - Plastic steel ball clock balance parts - Google Patents

Abstract

The utility model discloses a plastic steel ball clock pendulum wheel component, which relates to the component construction of the mechanical clock. The plastic steel ball clock pendulum wheel component is composed of a pendulum wheel frame, a pendulum anchor, a steel ball and a pendulous shaft. The forming steel ball and the pendulous shaft served as inserts are injected into molding at one time when the frame is injected to form an integrative structure; the assembly precision of the integrative structure is ensured by the mould, therefore, the process is largely simplified; the selecting process and the re-machining process of the original technique are not needed, which not only saves labor and material, but also reduces the cost; simultaneously each technical parameter of the rotational inertia, the static balance, radial jumping and the end jumping is ensured, which is in favor of increasing the finished product of the clock.

Description

Plastics steel ball verge ring parts

The utility model relates to the escapement parts in the mechanical clock.

The escapement parts are the critical pieces in the mechanical clock, and it must have certain moment of inertia, and must keep consistency with technical parameters such as the diameter run-out of escapement, face runout, static equilibrium, make hairspring setting accurate, improve the clock and watch end product quality.But it all is separately independently that escapement parts of the prior art are respectively formed other part, for example escapement framework and pendulum nail are the branch body structures, through repeatedly being assembled together with balance staff again after the processing, not only take a lot of work, take material, cost height, and the every technical parameter consistance after the assembling is poor, brings adverse effect to hairspring setting and clock and watch end product quality.Secondly, have certain moment of inertia for making escapement, copper coin is set on frame perimeter, copper coin must be through repeatedly processing, complex process, difficult quality guarantee.

Task of the present utility model is to overcome the defective of prior art and a kind of work simplification is provided, is easy to guarantee the plastics steel ball verge ring parts of end product quality.

Task of the present utility model is finished as follows: it comprises the escapement framework, the framework base is provided with the pendulum nail, balance staff vertically is located at frame center, and its special character is that the escapement framework is evenly equipped with steel ball on the periphery with radius, and framework, pendulum nail, balance staff, steel ball are monolithic construction.

The utility model is compared with known technology, owing to adopted overall structure form, simplified processing technology, need not select, reprocess, both saving of labor, material-saving, reduce cost again, avoided each other caused every technical parameter of part rigging error to comprise the defective of consistance differences such as moment of inertia, static equilibrium, diameter run-out, face runout simultaneously, improved the clock and watch end product quality.

Description of drawings.

Fig. 1 is the utility model structural representation.

Fig. 2 is the vertical view of Fig. 1.

Elaborate again in conjunction with above-mentioned accompanying drawing embodiment.

Shown in Fig. 1-2, plastics steel ball verge ring parts are basic part with escapement framework (1), and the framework base is provided with pendulum nail (3), and framework adopts the plastic material single injection-molded with the pendulum nail.Escapement framework uniform at least 2 steel balls (2) that the necessary quality of moment of inertia is provided on the periphery of radius, steel ball as inserts when the injection moulding of escapement framework by the pressure injection one, the steel ball size tolerance of selecting for use is very little, guarantee that by mould and die accuracy it is evenly distributed on the escapement frame perimeter, the quantity of steel ball is calculated decision according to moment of inertia, and this case is selected 5 for use.Balance staff (4) pressure injection one and vertically be inlaid in frame center during equally as the inserts injection moulding.Its process is earlier the steel ball of the balance staff of moulding and straight warp of design code and quantity to be placed among the escapement injection mold, makes balance staff and steel ball embed the escapement parts after injection moulding, forms monolithic construction.The invar ball is evenly distributed on the escapement frame perimeter, makes its moment of inertia and form and position tolerance to balance staff all can reach the drawing requirement, has not only simplified technology, has improved product quality simultaneously.

Claims (1)

1. plastics steel ball verge ring parts comprise escapement framework (1), and the framework base is provided with pendulum nail (3), and balance staff (4) vertically is located at frame center, it is characterized in that:

A. the escapement framework is being evenly equipped with steel ball (2) with on the periphery of half warp;

B. framework, pendulum nail, balance staff, steel ball are monolithic construction.

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