CN202209178U

CN202209178U - U-shaped card

Info

Publication number: CN202209178U
Application number: CN2011203359041U
Authority: CN
Inventors: 应永华; 何盈飞; 何琪君; 陈腾达
Original assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Current assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2012-05-02
Anticipated expiration: 2021-08-26

Abstract

The utility model discloses a U-shaped card which belongs to the field of connecting pieces and comprises an arc part as well as two clamping arms integrally connected with the arc part. The outside wall of the arc part and the outside walls of the clamping arms are circular arcs. The U-shaped card has the advantages of being capable of effectively preventing impression from generating and avoiding fatigue cracks and even breaking of the clamping arms of the U-shaped card due to stress concentration at the impression part; therefore, not only is the normal work of a hydraulic bracket guaranteed, but also the safety of underground working personnel is guaranteed.

Description

U type card

Technical field

The utility model relates to a kind of connector, particularly a kind of U type card of connecting between fully mechanized coal mining face hydraulic support pipe fitting of being used for.

Background technology

In the hydraulic support of fully mechanized coal mining face, can use a large amount of U type cards, it is hydraulic tube piece socket and the hydraulic tube piece joint fixture when interconnecting, and its fixing means and principle are: hydraulic tube piece socket both sides are equipped with a circular port; Spacing between two circular ports is slightly less than the spacings between two cards of U type card arm, and the hydraulic tube piece joint is provided with a cannelure, after the hydraulic tube piece joint is inserted in the hydraulic tube piece socket; With two end insertions that block arms from two circular ports of U type card, pass cannelure then, stretch out from the circular port other end at last; Owing to the spacing between two circular ports is slightly less than the spacings between two cards of U type card arm; Therefore, when U type card was inserted in the circular port, two card arms of U type card can come closer under the stopping of circular port inwall; Simultaneously; Two card arm outsides can produce bigger extruding force to the circular port inwall, make to have big stiction between card arm and the circular port, guarantee that U type card can not drop out from circular port.At present, the cross section of existing U type card card arm is all rectangular usually, and the U type of this structure is stuck in and also has a weak point in the actual application: owing to be located at the through hole of hydraulic tube piece socket both sides confession U type card insertion is circular port; And the cross section of U type card card arm is rectangular, therefore, and when two card arms of U type card are inserted in the circular port; Interactional two seamed edges that have only the card arm outside of itself and circular port, in other words, the mutual extrusion power between card arm and the circular port all concentrates on two seamed edges outside the card arm; Thereby two seamed edges that very easily cause the card arm outside are stressed excessive and produce impression; Particularly on two seamed edges in the card arm outside that is positioned at aperture, circular port two ends place, and in case impression occurs, will directly cause impression place stress to be concentrated; Long-time use can make the arm body of U type card produce fatigue crack; Even can cause the fracture of U type card arm body, thus not only can influence the operate as normal of hydraulic support, but also threatened underground work personnel's personal safety.

The utility model content

The technical problem that the utility model will solve is; A kind of generation that can effectively prevent impression is provided; The situation of avoiding the card arm to produce fatigue crack even fracture takes place, thereby not only can guarantee the operate as normal of hydraulic support, and can also guarantee the U type card of underground work personnel personal safety.

For solving the problems of the technologies described above, the utility model provides a kind of U type card of following structure: comprise that curved portions and two and curved portions are connected to holistic card arm, wherein, the lateral wall of the lateral wall of curved portions and card arm all is circular arc.

The described U type of the utility model card, wherein, the material of U type card is a stainless steel.

After adopting said structure, compared with prior art, the utlity model has following advantage: because the lateral wall of arc body and card arm all is circular arc; Therefore; When two card arms of U type card are inserted in the circular port, the lateral wall that is circular arc of card arm will be fitted with the circular port inwall, thereby increase the contact area of card arm and circular port greatly; The extruding force that makes the card arm receive the circular port inwall can be distributed on the whole arc-shaped surface; It is stressed to have significantly reduced unit area, thereby has effectively prevented the generation of impression, has avoided the card arm of U type card to concentrate the situation generation that produces fatigue crack even fracture because of impression place stress; Thereby not only guaranteed the operate as normal of hydraulic support, but also guaranteed underground work personnel's personal safety; In addition, U type card of the present invention is that material can improve its corrosion resistance greatly with the stainless steel, thereby can prolong the application life of U type card of the present invention greatly.

Description of drawings

Fig. 1 is the main TV structure sketch map of the utility model U type card.

Fig. 2 is along the sectional structure sketch map of A-A line among Fig. 1.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model U type card is done further to specify.

As depicted in figs. 1 and 2; In this specific embodiment, the utility model U type card is made by stainless steel, and it comprises that curved portions 1 and two and curved portions 1 are connected to holistic card arm 2; Wherein, The lateral wall 4 of the lateral wall 3 of curved portions 1 and card arm 2 all is circular arc, and card arm 2 right parts are slightly outward-dipping, its objective is when making card arm 2 be inserted in the circular port of hydraulic tube piece socket both sides more to be difficult to drop out; To guarantee the trouble free service of hydraulic support; The lateral wall 4 that is positioned at card arm 2 right-hand members is provided with guiding surface 5, and the effect of guiding surface 5 is when card arm 2 is inserted in the circular port of hydraulic tube piece socket both sides, to play guide effect, to make things convenient for the installation of the utility model U type card.

Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. U type card comprises that curved portions (1) and two are connected to holistic card arm (2) with curved portions (1), and it is characterized in that: the lateral wall (4) of the lateral wall (3) of said curved portions (1) and card arm (2) all is circular arc.

2. U type card according to claim 1 is characterized in that: the material of said U type card is a stainless steel.