CN2246212Y

CN2246212Y - Loosen-proof bolt group

Info

Publication number: CN2246212Y
Application number: CN 94214059
Authority: CN
Inventors: 张玉山
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-07
Filing date: 1994-06-07
Publication date: 1997-01-29
Anticipated expiration: 2004-06-07

Abstract

The utility model relates to a loosen-proof screw bolt group, which belongs to a never loose screw bolt group after being fastened and is composed of the screw blot, a screw nut, a washer and a spare cap. The upper part of the screw rod of the screw bolt is provide with one or more than one grooves along the longitudinal direction, the washer is a snap washer, one end of the washer is tilted, the upper part of the inner ring of the washer is provide with an inner stop, and the connection end of the spare cap and the washer is provided with a slope-shaped clamping groove. A connection piece, the screw nut, the washer and the spare cap are connected to the upper part of the screw bolt in series. The utility model has the advantages of reasonable structure, convenient operation, wide application range, reliable connection, low cost, etc.

Description

Anti-relaxed type bolt group

Anti-relaxed type bolt group provided by the utility model belong to a kind of with bolt, nut fastening after, the effect by packing ring, back of the body cap makes and himself enters self-locking state, reach once fastening after never lax new-type bolt group.

It in aspect Bolt Connection such as machinery, lathe, bridge, building, rolling stocks one of basic mode of connect installing between as accessory.So be widely used, consumption is very big.206 type bogies with railway passenger train are example, the bolt of M20 and above size only, and a car then needs nearly more than 200 groups.In order to guarantee vehicle safety operation, according to the regulation of inspection and repair regulation of storehouse inspection, row inspection, must check repeatedly bolt fastening degree, prevent to become flexible.Wherein supporting plate, cartridge bolt promptly are the attachment bolts of vehicle key position and are positioned at concealment part again.So the train-examiner must drill carriage, squat and look, face upward and action such as see, stretch forward, could hammer into shape and strike nut and confirm whether it becomes flexible.This situation is checked with terminal operation then quite difficult for the guardian, therefore omission often takes place easily, leak and repair, and then easily cause car accident.Also seriously at aspects such as lathe, machinery exist bolt looseness, move back problems such as button automatically.Though also have some to prevent the way of bolt looseness at present, all do not tackle the problem at its root.So at existing problem in the prior art, it is very necessary developing a kind of novel anti-relaxed type bolt group.

In view of existing problem in the present prior art, the purpose of this utility model is a kind of rational in infrastructure, easy to operate, widely applicable, reliable, low-cost novel anti-relaxed type bolt group of connection of design.The utility model is realized being tightened on nut on the bolt with the bolt group of new structure and is never moved back buckle and relax, thereby overcome existing bolt group and move back the loosening problem of buckleing owing to reasons such as vibration cause, therefore the utility model is that a kind of practicality is wide, the anti-relaxed type bolt group of reliable performance.

Anti-relaxed type bolt group described in the utility model, its structure is made up of bolt, nut, packing ring, back of the body cap.It vertically has one or more groove in the bolt shank upper edge of bolt.Packing ring is an open washer and an end perk, has backstop on the inner ring of packing ring, and back of the body cap is connected to hold with packing ring and has the slope shape draw-in groove; Being connected on the bolt of link, nut, packing ring, back of the body cap order.Groove on the bolt shank described in the utility model has two, and the position symmetry; The interior backstop of packing ring has two, and the position symmetry; Interior backstop can be slided and be contained in the groove.The slope shape draw-in groove that back of the body cap described in the utility model is had be shaped as right-angled triangle, its quantity is identical with the seamed edge number of back of the body cap, the slope shape draw-in groove is positioned at the bottom of every seamed edge.The link that nut described in the utility model will be connected on the bolt is fastening.The interior backstop of packing ring is inserted in the groove, the warpage end of packing ring be stuck in the back of the body cap the slope shape draw-in groove in make the back of the body cap can not reverse, the back of the body cap with packing ring spinning tightly on nut.

Anti-relaxed type bolt group described in the utility model is the novel very widely bolt group of a kind of purposes, be example only with the passenger-cargo carriage in the railway transport, at present passenger-cargo carriage because of supporting plate bolt, nut loosening, lose driving accident take place, just take place many every year, thereby cause enormous economic loss.At the characteristic of bolts such as passenger-cargo carriage supporting plate, cartridge, it is fastening never lax that the utility model of being developed can reach once.According to the existing car inspection and repair cycle, if newly make or during shed repair once mounting fastening, can not make check for loose, the promptly safe and reliable operation intensity that alleviated again in the vehicle utilization.The utlity model has rational in infrastructure, easy to operate, widely applicable, characteristics such as connection is reliable, low price.Can be applicable to widely that lathe, machinery, rolling stock, automobile and bridge, building etc. need the position of Bolt Connection, also can be used for riveted structure.Extensive utilization of the present utility model will produce huge economic benefit and social benefit.

The utility model has three accompanying drawings, and wherein: accompanying drawing 1 is the overall structure figure of anti-relaxed type bolt group.Accompanying drawing 2 is structural drawing of accompanying drawing 1 split shed packing ring.Accompanying drawing 3 is structural drawing of back of the body cap in the accompanying drawing 1.

Among the figure: 1 bolt, 2 nuts, 3 packing rings, 4 back of the body caps, 5 grooves, 6 interior backstops, 7 slope shape draw-in grooves, 8 links, 9 bolt shank.

Specific embodiment of the utility model has two grooves (5) as shown in drawings on the bolt shank (9) of bolt (1), two grooves (5) are symmetry status, and the bus of all same bolt shank (9) is parallel, and its length is identical with the length of screw thread.Packing ring (3) is the spring washer of opening, the perk of one end, the inner of packing ring (3) have two positions symmetry equal-sized in backstop (6), the height of interior backstop (6) and width all are slightly less than the degree of depth and the width of groove.The medial extremity that back of the body cap (4) is connected with packing ring (3) has one group 6 slope shape draw-in grooves (7); The quantity of slope shape draw-in groove (7) is identical with the numbers of sides of back of the body cap (4).Slope shape draw-in groove (7) is triangle at right angles, and its right angle side height is 1.5～3mm.When using the utility model, at first bolt (1) is through on the link (8), turning round upper cap nut (2) on the bolt shank that stretches out (9) earlier makes it fastening, then the interior backstop (6) of packing ring (3) is inserted groove (5), and packing ring (3) is slided into nut (2) locate, to carry on the back cap (4) again and be spun on the bolt shank (9), when the back of the body same packing ring of cap (4) (3) contacted and tightens together, then the perk end of spring washer (3) was stuck in the slope shape draw-in groove (7) of back of the body cap (4).Thereby make nut (2), packing ring (3), the back of the body same link of cap (4) (8) connecting together tightly.When any vibrations occurring or with spanner twisting back of the body cap (4), can not make it loosening, so realize once fastening after, the bolt group is never lax.

Claims

1, anti-relaxed type bolt group is characterized in that being made up of bolt (1), nut (2), packing ring (3), back of the body cap (4); It vertically has one or more groove (5) in bolt shank (9) upper edge of bolt (1), and packing ring (3) is an open washer and an end perk, has interior backstop (6) on the inner ring of packing ring (3); The back of the body same packing ring of cap (4) (3) is connected to hold and has slope shape draw-in groove (7); Being connected on the bolt (1) of link (8), nut (2), packing ring (3), back of the body cap (4) order.

2, anti-relaxed type bolt group according to claim 1 is characterized in that the groove (5) on the bolt shank (9) has two, and the position symmetry; The interior backstop (6) of packing ring (3) has two, and the position symmetry; Interior backstop (6) can be slided and be contained in the groove (5).

3, anti-relaxed type bolt group according to claim 1 is characterized in that carrying on the back the right-angled triangle that is shaped as of slope shape draw-in groove (7) that cap (4) had, and its quantity is identical with the seamed edge number of back of the body cap (4), and slope shape draw-in groove (7) is positioned at the bottom of every seamed edge.