CN205173196U

CN205173196U - Bolt locating piece

Info

Publication number: CN205173196U
Application number: CN201520837016.8U
Authority: CN
Inventors: 刘恢先; 候宪勇; 王珊
Original assignee: China National South Aviation Industry Co Ltd
Current assignee: AECC South Industry Co Ltd
Priority date: 2015-10-26
Filing date: 2015-10-26
Publication date: 2016-04-20
Anticipated expiration: 2025-10-26

Abstract

The utility model provides a bolt locating piece, it is used for installing the location to the radial cross section of head for rectangular bolt, its includes a quadrangle base, one with the L shape locating part of pedestal connection, L shape locating part includes that a setting is in first spacing portion and a setting of base top surface are in the spacing portion of second of base side, the base is provided with the cavity through -hole, first spacing portion is the cuboid structure, the spacing portion of second is platelike structure. The utility model provides a bolt locating piece, it passes through two spacing portions and realizes location and instrumental function, can effectively guarantee the correct rigging position to the bolt that has the rectangle head, and rotate in can preventing to use, guarantees connection structure's security, can simplify assembly requirements in addition, can solve at the narrow and small mounted position in space less with a spanner during assembly, not use the shortcoming of mounting tool well, lighten intensity of labour, improve labor efficiency.

Description

Bolt positioning block

Technical Field

The utility model relates to the field of machinary, in particular to bolt locating piece.

Background

The bolt connecting structure is a connecting structure commonly used in the mechanical field, but in some mechanical connecting parts bearing deflection load, such as the connecting part of an auxiliary mounting joint during assembling of a turboprop engine, the root of a standard hexagon bolt sold in the market is easy to break in use, so that the use of the product is seriously influenced. Fig. 1 is a schematic diagram of a bolt force applied to a connection portion of an auxiliary mounting section of a turboprop engine, and referring to fig. 1, a bolt 1 is connected with an auxiliary mounting section 3, a compressor casing 4 and a combustion chamber casing 5 through a nut 2, the auxiliary mounting section 3 is deformed due to a deflection load F1, so that a head of the bolt 1 deflects, and thus the head of the bolt 1 bears an excessive bending stress caused by the deflection load F1, and when the bolt 1 adopts a standard hexagon head bolt sold in the market, the head of the bolt 1 is easily broken from a root under the repeated action of the deflection load F1.

FIG. 2 is a schematic view of a bolt; fig. 3 is a left side view of the structure of fig. 2. Referring to fig. 2 to 3, in order to solve the problem that the head of the bolt 1 is easily broken from the root, the inventor of the present application provides a bolt 6 comprising a screw 61 and a head 62 which are connected with each other, the radial section of the head 62 is rectangular, the length w2 of the short side of the head 62 is 3 to 8mm greater than the diameter d of the screw 61, and the ratio of the length w1 of the long side of the head 62 to the length w2 of the short side is 1.35/1 to 1.65/1. The bolt 6 is provided with a rectangular head 62, and when the bolt is installed, the long side corresponds to the deformation direction, so that the eccentricity borne by the head 62 can be effectively reduced, and the bending stress borne by the head 62 is also effectively reduced, thereby avoiding the situation that the root of the head 62 is broken in the use process.

However, since the head 62 of the bolt 6 is rectangular, it is necessary to ensure the attachment in place during the assembly process, and the long side is made to correspond to the deformation direction, and it is also necessary to prevent the interference with peripheral members due to the rotation during use.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a bolt locating piece to reduce or avoid the aforementioned problem.

In order to solve the technical problem, the utility model provides a bolt locating piece, it is used for installing the location for rectangular bolt to the radial cross section of head, and it includes a quadrangle base, one with pedestal connection's L shape locating part, L shape locating part includes that one sets up the first spacing portion and one setting of pedestal face are in the spacing portion of second of base side, the base is provided with the cavity through-hole, first spacing portion is the cuboid structure, the spacing portion of second is platelike structure.

Preferably, the length of the first limiting part is the same as the diameter of the hollow through hole of the base.

Preferably, the height of the first limiting part is 5-15 mm.

Preferably, the thickness of the second limiting part is 3-6 mm.

The utility model provides a bolt positioning block, which realizes the functions of positioning and tool through two limiting parts, can effectively ensure the correct assembly position of the bolt with a rectangular head, can prevent rotation in use, and ensures the safety of a connecting structure; in addition, the assembly requirement can be simplified, one wrench can be omitted during assembly, the defect that an installation tool is not well used at an installation position with a narrow space is overcome, the labor intensity is reduced, and the labor efficiency is improved.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a schematic diagram of bolt stress at a connection portion of an auxiliary mounting section of a turboprop engine;

FIG. 2 is a schematic view of a bolt;

FIG. 3 is a left side view of the structure of FIG. 2;

fig. 4 is a schematic structural view of a bolt positioning block according to an embodiment of the present invention;

FIG. 5 is a schematic top view of the structure of FIG. 4;

FIG. 6 is a schematic sectional view A-A of FIG. 5.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.

FIG. 2 is a schematic view of a bolt; FIG. 3 is a left side view of the structure of FIG. 2; fig. 4 is a schematic structural view of a bolt positioning block according to an embodiment of the present invention; FIG. 5 is a schematic top view of the structure of FIG. 4; FIG. 6 is a schematic sectional view A-A of FIG. 5. Referring to fig. 2-6, the utility model provides a bolt locating piece 7, it is used for installing the location for rectangular bolt 6 to the radial cross-section of head 62, and it includes a quadrangle base 71, one with the L shape locating part that base 71 is connected, L shape locating part includes that one sets up the first spacing portion 72 and one of base 71 top surface set up in the spacing portion 73 of second of base 71 side, base 71 is provided with hollow through hole, first spacing portion 72 is the cuboid structure, the spacing portion 73 of second is platelike structure.

Fig. 1 is a schematic diagram of bolt force applied to a connection portion of an auxiliary mounting section of a turboprop engine, and referring to fig. 1, when the bolt 6 is used to replace the bolt 1 for mounting, the bolt 6 may be inserted into a hollow through hole of a base 71, so that a long side of a head 62 of the bolt 6 is attached to a first limit portion 72, then the base 71 may be placed at a mounting position, so that a second limit portion 73 is attached to a side wall of a component mounting position (for example, a side wall of the auxiliary mounting section 3 in fig. 1), so that a nut 2 may be screwed on the bolt 6 in place for fixing, during screwing the nut 2, since the head 62 is limited by the first limit portion 72, and the second limit portion 73 is limited by a side wall of the component mounting position (for example, a side wall of the auxiliary mounting section 3 in fig. 1), therefore, the bolt 6 and the bolt positioning block 7 do not displace, so that tools such as a wrench and the like are not needed to mount and clamp the head 62, and the mounting operation is simplified.

After the bolt 6 is fixed, due to the limiting effect of the first limiting portion 72 and the second limiting portion 73, the bolt 6 is not displaced during use, so that interference to peripheral components is avoided.

The L-shaped stopper may be integrally formed with the base 71 (for example, by casting), or may be connected to the base 71 by welding.

In a preferred embodiment, the length w3 of the first position-limiting portion 72 is the same as the diameter of the hollow through hole of the base 71.

In a preferred embodiment, the height h1 of the first stopper 72 is 5-15mm, which on the one hand ensures sufficient support for the head 62 and on the other hand saves manufacturing costs.

In a preferred embodiment, the thickness w4 of the second limiting portion 73 is 3-6mm, which can ensure sufficient support and save manufacturing cost.

It is to be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, it is not intended that each embodiment cover a separate embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. The utility model provides a bolt locating piece, its be used for installing the location for rectangular bolt to the radial cross-section of head, its characterized in that, it includes a quadrangle base, one with pedestal connection's L shape locating part, L shape locating part includes that one sets up the first spacing portion and one of pedestal roof are in the spacing portion of second of base side, the base is provided with the cavity through-hole, first spacing portion is the cuboid structure, the spacing portion of second is platelike structure.

2. The bolt positioning block of claim 1, wherein the length of the first limiting portion is the same as the diameter of the hollow through hole of the base.

3. The bolt positioning block of claim 1, wherein the height of the first limiting portion is 5-15 mm.

4. The bolt positioning block of claim 1, wherein the thickness of the second limiting portion is 3-6 mm.