CN204458774U

CN204458774U - Bolt

Info

Publication number: CN204458774U
Application number: CN201520091429.6U
Authority: CN
Inventors: 樊卫峰
Original assignee: Ningbo Economic And Technological Development Zone Yong Gang Securing Member Co Ltd
Current assignee: Ningbo Economic And Technological Development Zone Yong Gang Securing Member Co Ltd
Priority date: 2015-02-07
Filing date: 2015-02-07
Publication date: 2015-07-08
Anticipated expiration: 2025-02-07

Abstract

The utility model discloses a kind of bolt, its drip irrigation device is a kind of bolt, comprise bolt head and screw rod, the top of described screw rod is fixedly connected with bolt head, and described screw rod is provided with cavity away from the side-walls of bolt head, and described cavity internal fixtion is provided with air bag, described screw rod is provided with the inflator making air bag protrude from cavity, by giving airbag aeration, making an air bag part protrude from cavity, thus reaching the object preventing nut from dropping.

Description

Bolt

Technical field

The utility model relates to a kind of fastening piece, and more particularly, it relates to a kind of bolt.

Background technique

Bolt, by bolt head and screw rod (with an externally threaded cylindrical body) class fastening piece dimerous, needs and nut screw connection, for being fastenedly connected two parts with through hole.This Connecting format claims bolt to connect.As nut is screwed off from bolt, can make again these two parts separately, therefore bolt connection belongs to removably connect.

And when bolt be connected to be given a shock for a long time time, there will be loosening between nuts and bolt, thus cause nut and bolt falling, the nut that prevents that the screw rod that some bolt adopts in the market inserts latch and so near the position of bottom comes off, but this just causes latch easily to be lost, and each installation all needs first to be taken off by latch, extremely bothers.

Model utility content

For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of bolt, and it can prevent from occurring the phenomenon that nut drops in the process used.

For achieving the above object, the utility model provides following technological scheme: a kind of bolt, comprise bolt head and screw rod, the top of described screw rod is fixedly connected with bolt head, described screw rod is provided with cavity away from the side-walls of bolt head, and described screw rod is provided with the inflator making air bag protrude from cavity.

Preferably, described inflator comprises push rod and piston, described screw rod is provided with back to one end of bolt head the aeration tank communicated with inside air bag, described piston is positioned at aeration tank and is formed with aeration tank and is sealed and matched, and described push rod and plunger backer are fixedly connected with screw rod one end and one end of push rod protrudes from aeration tank.

Preferably, the sidewall of described aeration tank is provided with the fixing device for fixing push rod away from air bag place.

Preferably, described fixing device comprises elastic rope, and the two ends of described elastic rope are fixedly connected with the sidewall of aeration tank respectively, and described push rod is provided with back to one end of air bag the fixed groove coordinated with elastic rope.

Preferably, described aeration tank is circular, and the outer ring surface of described piston is provided with coaxial annular groove arranged with it, and be provided with O-ring seal in described annular groove, described O-ring seal and aeration tank are sealed and matched.

Preferably, the degree of depth of described aeration tank and the height of push rod, piston are with identical.

Compared with prior art, the beneficial effects of the utility model are: after by nut screwing clamping, inflated to inside air bag by inflator, airbag aeration expands, a part for air bag will protrude from cavity, and like this when loosening will dropping appears in nut and screw rod time, nut moves to air bag place, air bag can play position-limiting action to nut, prevents nut from dropping.

Accompanying drawing explanation

Sectional view when Fig. 1 is the air bag expansion of the utility model screw embodiment;

Fig. 2 is the partial enlarged drawing of A in Fig. 1;

Fig. 3 is the sectional view of the utility model screw embodiment;

Fig. 4 is the partial enlarged drawing of B in Fig. 3;

Fig. 5 is the structural drawing of inflator.

Reference character: 1, bolt head; 2, screw rod; 21, cavity; 22, aeration tank; 3, air bag; 4, inflator; 41, piston; 411, annular groove; 42, push rod; 421, fixed groove; 5, O-ring seal; 6, elastic rope.

Embodiment

Referring to figs. 1 through Fig. 5, the utility model screw embodiment is described further.

A kind of bolt, comprise bolt head 1 and screw rod 2, the top of described screw rod 2 is fixedly connected with bolt head 1, described screw rod 2 is provided with cavity 21 away from the side-walls of bolt head 1, described cavity 21 internal fixtion is provided with air bag 3, described screw rod 2 is provided with the inflator 4 making air bag 3 protrude from cavity 21, described inflator 4 comprises push rod 42 and piston 41, described screw rod 2 is provided with back to one end of bolt head 1 aeration tank 22 communicated with air bag 3 inside, described piston 41 is positioned at aeration tank 22 and is formed with aeration tank 22 and is sealed and matched, described push rod 42 and piston 41 are fixedly connected with back to screw rod 2 one end and one end of push rod 42 protrudes from aeration tank 22.

After by nut screwing clamping, now piston 41 is positioned at the position away from air bag 3, direction towards air bag 3 promotes push rod 42, push rod 42 drives piston 41 to move towards the direction of air bag 3 together, because piston 41 and inflation are from being sealed and matched, therefore piston 41 can by the gas press-in air bag 3 in aeration tank 22, air bag 3 inflation, a part for air bag 3 will protrude from cavity 21, like this when loosening will dropping appears in nut and screw rod 2 time, nut moves to air bag 3 place, and air bag 3 can play position-limiting action to nut, prevents nut from dropping.

And the sidewall of aeration tank 22 is provided with the fixing device for fixing push rod 42 away from air bag 3 place, described fixing device comprises elastic rope 6, the two ends of described elastic rope 6 are fixedly connected with the sidewall of aeration tank 22 respectively, described push rod 42 is provided with back to one end of air bag 3 fixed groove 421 coordinated with elastic rope 6, tensile elasticity rope 6, then make elastic rope 6 by fixed groove 421, because now elastic rope 6 is in stay cord state, therefore elastic rope 6 can give push rod 42 1 power towards air bag 3, and anti-throw-out lever 42 moves.

And when nut backed out by needs time, tensile elasticity rope 6, elastic rope 6 is made to depart from fixed groove 421, then push pedal is promoted towards the direction away from capsule, piston 41 can be followed and move towards the direction away from bolt head 1 together, thus makes a part of gas in air bag 3 enter in aeration tank 22, and the volume of such air bag 3 will reduce, thus reach the object made in the whole retraction cavity 21 of air bag 3, so just nut can be separated with bolt.

By arranging aeration tank 22 for circular, the outer ring surface of piston 41 is provided with coaxial annular groove 411 arranged with it, O-ring seal 5 is provided with in annular groove 411, O-ring seal 5 and aeration tank 22 are sealed and matched, the sealing of piston 41 and aeration tank 22 sidewall can be increased so further, prevent the gas in the air bag after inflation 3 from flowing out.

The utility model is by the height of the degree of depth with push rod 42, piston 41 that arrange aeration tank 22 with identical, and after giving in air bag 3 gas of substituting the bad for the good, push rod 42 is whole is positioned at aeration tank 22, saves space.

The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. a bolt, comprise bolt head and screw rod, the top of described screw rod is fixedly connected with bolt head, it is characterized in that: described screw rod is provided with cavity away from the side-walls of bolt head, described cavity internal fixtion is provided with air bag, and described screw rod is provided with the inflator making air bag protrude from cavity.

2. bolt according to claim 1, it is characterized in that: described inflator comprises push rod and piston, described screw rod is provided with back to one end of bolt head the aeration tank communicated with inside air bag, described piston is positioned at aeration tank and is formed with aeration tank and is sealed and matched, and described push rod and plunger backer are fixedly connected with screw rod one end and one end of push rod protrudes from aeration tank.

3. bolt according to claim 2, is characterized in that: the sidewall of described aeration tank is provided with the fixing device for fixing push rod away from air bag place.

4. bolt according to claim 3, is characterized in that: described fixing device comprises elastic rope, and the two ends of described elastic rope are fixedly connected with the sidewall of aeration tank respectively, and described push rod is provided with back to one end of air bag the fixed groove coordinated with elastic rope.

5. the bolt according to Claims 2 or 3 or 4, it is characterized in that: described aeration tank is for circular, the outer ring surface of described piston is provided with coaxial annular groove arranged with it, and be provided with O-ring seal in described annular groove, described O-ring seal and aeration tank are sealed and matched.

6. the bolt according to Claims 2 or 3 or 4, is characterized in that: the degree of depth of described aeration tank and the height of push rod, piston are with identical.