CN202326908U - Shackle with counter bores - Google Patents

Abstract

The utility model discloses a shackle with counter bores, which aims at improving strength of a shackle assembly through minor improvement in structure on the basis that nearly no material is added on the existing shackle. The shackle is in U shape, through holes which are lined up are arranged on the head portions of forked legs of the shackle, one hole is a unthreaded hole, and the other hole is a threaded hole. The shackle with counter bores is characterized in that the counter bores are arranged on the opening of the threaded hole opposite to the side of the unthreaded hole, and the diameter of the counter bores is larger than or equal to the large diameter of the threaded hole. Due to the counter bores arranged at the opening position of the threaded hole, when the shackle is screwed with a horizontal pin, an unthreaded part of the horizontal pin behind a screw is inserted into the counter bores, so that the stressed diameter of the horizontal pin between the two forked legs is larger than the bottom diameter of the existing threads, tensile strength of the shackle assembly is greatly improved, and fatigue damage caused by concentrated stress at the tail end of the threads is avoided. The shackle has the advantages of being simple in structure, convenient to manufacture and high in strength.

Description

The shackle of band counterbore

Technical field

The utility model belongs to a kind of rigging, particularly a kind of shackle with counterbore.

Background technique

Shackle usually and lateral pin be used, general shackle takes the shape of the letter U or the annular of opening, is shaped on straight through hole at the head of its y-bend pin, all being shaped on screw thread in one of them through hole is screw, another is a unthreaded hole.The screw that its head of lateral pin that is used with shackle is shaped on screw thread and shackle screws fixing like Fig. 1, shown in Figure 2.The shackle of processing by this structure when with the lateral pin assembling after; The threaded bores of the tail end of lateral pin screw thread between the y-bend pin; Because lateral pin is directly located the sectional area minimum at the end of screw thread; When lateral pin was drawn, the size of its intensity depended primarily on the size of the core diameter of thread, and such design is seen not too science from loading angle.

The model utility content

The purpose of the utility model provides a kind of increasing hardly on the basis of former shackle under the condition of material, improves the shackle of the band counterbore that can improve shackle assembly parts intensity slightly in structure.

In order to reach above-mentioned requirements; The utility model is realized through following technological scheme: it takes the shape of the letter U; Head at its y-bend pin is shaped on straight through hole, and one of them is a unthreaded hole, and another is a screw; It is characterized in that being shaped on counterbore in the threaded bores of relative unthreaded hole one side, the diameter of said counterbore is more than or equal to the big footpath of screw.

The diameter of said counterbore equals the diameter of unthreaded hole.

The shackle of the band counterbore of making according to said structure; Owing to be shaped on counterbore in threaded bores; After this shackle and lateral pin screwed, the polished rod on the lateral pin behind the screw rod partly was inserted in the counterbore, made that the stressed diameter of lateral pin increases than the original core diameter of thread to some extent between the two fork pin; Make the tensile strength of shackle assembly parts improve greatly, also avoided screw thread tail end stress to concentrate the fatigue damage that is caused.It has advantage simple in structure, easily manufactured, that intensity is high.

Description of drawings

Fig. 1 is the plan view of existing shackle;

Fig. 2 is the erection drawing of existing shackle and lateral pin;

Fig. 3 is the shackle plan view of band counterbore;

Fig. 4 is the right elevation of Fig. 3;

Fig. 5 is the shackle of band counterbore and the erection drawing of lateral pin.

Among the figure: 1, fork pin; 2, unthreaded hole; 3, screw; 4, counterbore; 5, lateral pin; 6, polished rod.

Embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe.

Fig. 3, Fig. 4 are the shackle structural representations of band counterbore, from figure, find out that it takes the shape of the letter U; Head at its y-bend pin 1 is shaped on straight through hole; One of them is a unthreaded hole 2, and another is a screw 3, is shaped on counterbore 4 in the relative threaded bores of unthreaded hole 2 one sides; The diameter of said counterbore 4 is more than or equal to the big footpath of screw 3, and the diameter of said counterbore 4 equals the diameter of unthreaded hole 2.After this shackle and lateral pin 5 screwed, polished rod 6 parts on the lateral pin 5 behind the screw rod were inserted in the counterbore 4 as shown in Figure 5, made that lateral pin 5 stressed diameters increase than the original core diameter of thread to some extent between the two fork pin 1, thereby had improved the tensile strength of shackle assembly parts.

Claims (2)

1. the shackle of band counterbore, it takes the shape of the letter U, and is shaped on straight through hole at the head of its y-bend pin; One of them is a unthreaded hole; Another is a screw, it is characterized in that being shaped on counterbore in the threaded bores of relative unthreaded hole one side, and the diameter of said counterbore is more than or equal to the big footpath of screw.

2. the shackle of band counterbore according to claim 1 is characterized in that the diameter of said counterbore equals the diameter of unthreaded hole.

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