CN109611435B

CN109611435B - Nut

Info

Publication number: CN109611435B
Application number: CN201811300488.4A
Authority: CN
Inventors: 曹伟; 吴艳红; 安迎和; 张胜芝; 邢春英
Original assignee: CASIC Space Engineering Development Co Ltd
Current assignee: CASIC Space Engineering Development Co Ltd
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2021-08-06
Anticipated expiration: 2038-11-02
Also published as: CN109611435A

Abstract

The invention discloses a nut which comprises a nut body, wherein one end of the nut body is provided with a columnar positioning part extending along the axial direction, a threaded hole in the nut body penetrates through the positioning part, the lower end part of the positioning part radially extends outwards to form at least two first lugs for circumferential limiting, the outer diameter formed by the first lugs is matched and corresponds to the inner diameter of a connecting hole in a connected piece, and a telescopic positioning pin is arranged at the upper end part close to the positioning part. The nut has the functions of circumferential limiting and axial positioning, and particularly when one side of the movable mechanism is positioned in a closed space, the nut can be connected and pre-tightened with a bolt under the condition of limiting without an external tool by utilizing the self circumferential limiting function, so that the mechanism is restrained at a fixed position; after the mechanism is unlocked, the nut can be fixed at a required position by utilizing the axial positioning function of the mechanism.

Description

Nut

Technical Field

The invention relates to the technical field of fasteners. And more particularly, to a nut.

Background

The screw pair fastening mechanism is a common screw thread matching fastening mechanism, the most common screw thread matching fastening connecting piece is a fastening connecting piece with a bolt and a nut matched with each other, and the screw thread connection of the connected piece is realized through the screw thread of the bolt. The bolt and the nut have good connection performance and simple structure, and are widely applied to the field of machinery, and the nuts commonly used at present are various types such as square nuts, round nuts, hexagon nuts, butterfly nuts, supporting plate nuts and the like. When the object to be connected is a pure structure product and the connecting surfaces on the two sides are both in an open space, a common nut can be selected and used, and the nut and the screw rod are respectively acted on by tools to realize the fastening of the connecting piece. When being connected object one side and being in narrow and small or when the enclosure space, can select for use the layer board nut, fix the layer board nut in the narrow and small or enclosure space one side of connected object earlier, then pass through the instrument from the opposite side and screw up the bolt to realize the fastening of connecting piece.

When the connection object is a mechanism product, the nut is required to realize reliable connection of parts and smooth separation and positioning at proper time, and the current commonly used nut cannot meet the use requirement. The problem is particularly serious when the mechanism product is in a closed space on one side.

Therefore, there is a need to provide a new nut that overcomes the deficiencies of the prior art.

Disclosure of Invention

The invention aims to provide a novel nut which can realize circumferential limiting and axial positioning without an external tool, so that the requirement of mechanism products on the nut connecting and separating functions is met.

According to one aspect of the invention, a nut is provided, which comprises a nut body, one end of the nut body is provided with a columnar positioning part extending along an axial direction, a threaded hole in the nut body penetrates through the positioning part, the lower end part of the positioning part extends outwards in a radial direction to form at least two first lugs for circumferential limiting, the outer diameter of each first lug is matched and corresponds to the inner diameter of a connecting hole in a connected piece, and a telescopic positioning pin is arranged close to the upper end part of the positioning part.

Preferably, the two telescopic positioning pins are arranged and are oppositely arranged on two sides of the positioning part.

Preferably, the retractable locating pin includes the locating pin and with the spring that locating pin one end is connected, set up along the mounting hole of radially extending on the location portion, locating pin and spring setting are in the mounting hole, just the locating pin can be followed the mounting hole surface and slided.

Preferably, the upper end part of the positioning part extends outwards in the radial direction to form two second lugs for circumferential limiting, and the outer diameter formed by the second lugs corresponds to the inner diameter of the connecting hole in the connected piece in a matching mode.

Preferably, the two second lugs are oppositely arranged on two sides of the positioning part.

Preferably, the nut body and the positioning part are integrally formed.

Preferably, the nut body may be a hexagonal nut, a round nut, or a square nut.

The invention has the following beneficial effects:

the nut has the functions of circumferential limiting and axial positioning, and particularly when one side of the movable mechanism is positioned in a closed space, the nut can be connected and pre-tightened with a bolt under the condition of limiting without an external tool by utilizing the self circumferential limiting function, so that the mechanism is restrained at a fixed position; after the mechanism is unlocked, the nut can be fixed at a required position by utilizing the axial positioning function of the mechanism.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of the present invention.

Fig. 2 shows a cross-sectional view of the nut connection state of the present invention.

Fig. 3 shows a cross-sectional view of the nut of the present invention in a separated state.

Detailed Description

In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.

In order to realize the purpose of the invention, the nut can realize circumferential limit and axial positioning without an external tool, thereby solving the requirement of mechanism products on the function of connecting and separating the nut. The invention provides a nut as shown in fig. 1-2, the nut comprises a nut body 1 and a positioning part 2, the positioning part 2 is provided with a columnar shape and is fixedly arranged on one end surface of the nut body 1 along the axial direction of the nut body, and the positioning part 2 and the nut body 1 are integrally formed in the embodiment. The nut body 1 may be a hexagonal nut, a round nut, or a square nut, and in this embodiment, the nut body 1 is a hexagonal nut, and the threaded hole of the nut body 1 penetrates through the positioning portion 2. The lower end part of the positioning part 2 extends outwards in the radial direction to form two first lugs 21, and the outer diameter formed by the two first lugs 21 is matched and corresponds to the inner diameter of the connecting hole on the connected piece. The upper end of the positioning part 2 extends outwards in the radial direction to form two second lugs 22, and the outer diameter formed by the two second lugs 22 is matched and corresponds to the inner diameter of the connecting hole on the connected piece. The upper end part close to the positioning part 2 is provided with two retractable positioning pins 23 which are arranged on two sides of the positioning part 2 relatively. Specifically, as shown in fig. 2, the retractable positioning pin 23 includes a positioning pin 24 and a spring 25, one end of the positioning pin 24 is connected to the spring 25, a mounting hole extending in the radial direction is formed in the positioning portion 2, and the positioning pin 24 and the spring 25 are disposed in the mounting hole.

As shown in fig. 2, the nut body 1 is located on the surface of the first connecting member 10, and the positioning portion 2 is located in a connecting hole of the first connecting member 10, the connecting hole being a special-shaped hole corresponding to the positioning portion 2. At this time, the retractable positioning pins 23 are in a compressed state, that is, the positioning pins 24 are compressed into the mounting holes of the positioning part 2 by the inner walls of the coupling holes. Since the first lug 21 and the second lug 22 are in contact with the inner wall of the connecting hole, the nut cannot rotate when the bolt 3 is screwed, and at the moment, the bolt and the nut can be connected and pre-tightened by rotating the bolt head through the action of a tool, so that the first connecting piece 10 and the second connecting piece 20 are ensured to be in a fixed connection state. The outer diameter that first lug 21 and second lug 22 formed corresponds with the internal diameter of connecting hole for first lug 21 and second lug 22 all contact with the connecting hole inner wall, thereby can restrict the circumferential position of nut, realize being connected of bolt 3 and nut, satisfy the demand of mechanism class product to connection function.

As shown in fig. 3, the bolt 3 is disconnected to release the connection with the nut, thereby releasing the connection between the first connector 10 and the second connector 20. The bolt of this embodiment can be the explosive bolt of firer, and when the bolt blasting disconnection, the nut upwards removed under the bolt separating force effect, when the nut upwards removed telescopic locating pin 23 and left the connecting hole, locating pin 24 lost the restraint of connecting hole inner wall, outwards stretched out under the effect of spring 25, prevented the downward removal of nut, fixed with the axial position restraint of nut. Further, still can set up closing cap 40 on the first connecting piece 10, be equipped with the fixed slot 41 that corresponds with retractable locating pin 23 on the closing cap 40, after retractable locating pin 23 moved to in the fixed slot 41, the nut will be fixed to it is fixed by the restraint completely in axial direction, satisfies the demand of mechanism class product to the separation function.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.

Claims

1. The utility model provides a nut, its characterized in that, includes nut body and closing cap, the one end of nut body is equipped with the columnar location portion that extends along axial direction, the internal screw hole of nut run through in location portion, the lower tip of location portion forms two at least first lugs that are used for circumference spacing along radial outside extension, the external diameter that first lug formed matches with the connecting hole internal diameter by on the connecting piece and corresponds, is close to the upper end of location portion is provided with retractable locating pin, be equipped with in the closing cap with the fixed slot that retractable locating pin corresponds, after the bolt disconnection, through retractable locating pin gets into in the fixed slot, will the nut body is fixed in the closing cap.

2. The nut according to claim 1, wherein the retractable positioning pins are provided in two and oppositely disposed at both sides of the positioning portion.

3. The nut according to claim 2, wherein the retractable positioning pin comprises a positioning pin and a spring connected with one end of the positioning pin, a radially extending mounting hole is formed in the positioning portion, the positioning pin and the spring are arranged in the mounting hole, and the positioning pin can slide along the surface of the mounting hole.

4. The nut according to claim 1, wherein the upper end of the positioning part extends outwards in the radial direction to form two second lugs for circumferential limiting, and the second lugs form an outer diameter which is matched with the inner diameter of the connecting hole on the connected piece.

5. The nut of claim 4 wherein the two second lugs are oppositely disposed on either side of the locating portion.

6. The nut according to claim 1, wherein the nut body is integrally formed with the positioning portion.

7. The nut of claim 1 wherein said nut body is a hex nut, round nut or square nut.