CN105317808A

CN105317808A - Self-extrusion bolt

Info

Publication number: CN105317808A
Application number: CN201510826194.5A
Authority: CN
Inventors: 尤成武
Original assignee: ZHEJIANG HUAYUAN AUTOMOBILE PARTS Co Ltd
Current assignee: ZHEJIANG HUAYUAN AUTOMOBILE PARTS Co Ltd
Priority date: 2015-11-25
Filing date: 2015-11-25
Publication date: 2016-02-10

Abstract

The invention discloses a self-extrusion bolt, which comprises a bolt head and a screw, wherein external threads are formed on the external surface of the screw; four grooves are formed in the external threads; the four grooves are spirally uniformly distributed in the external threads of the screw; an operation hole is formed in the head part of the bolt; and the operation hole comprises a bottom straight groove and an upper hexagonal hole. The invention also provides a screwdriver which is matched with the self-extrusion bolt. The bolt is simple in structure; when the bolt is used, chippings can be discharged from the grooves, so that the drilling operation is labor-saving and rapid; the end face of the bolt is provided with the straight groove and the hexagonal hole, so that the bolt can be unscrewed by a straight screwdriver head and a hexagonal screwdriver head, and meanwhile, the bolt can be operated by a screwdriver with a straight screwdriver head and a hexagonal cylinder. The common problem that an opening groove is easy to wear so that the bolt cannot be unscrewed is well solved.

Description

From crowded bolt

Technical field

The present invention relates to a kind of from squeezing bolt.

Background technique

When large foundry goods, ironcasting needs be bolted miscellaneous part, because foundry goods directly can not cast out screw thread, make screw thread again after generally all getting out base hole in advance, operation is various, the time and human cost larger.

Summary of the invention

In view of the deficiency that background technique exists, technical problem to be solved by this invention be to provide a kind of structure simple, reduce costs and fastening effect good from squeezing bolt.

The present invention takes following technological scheme: from squeezing bolt, comprise bolt head and screw rod, it is characterized in that: described screw rod outer surface is provided with outside thread, described outside thread is provided with four grooves, described four grooves are distributed on the outside thread of screw rod in the shape of a spiral, described bolt head end handle hole to be had, handle hole comprises the straight groove of bottom and the hex hole on top

In the present invention, should be simple from squeezing bolt arrangement, ironcasting after getting out base hole without the need to making screw thread in base hole, directly carry out from squeezing tapping with electrical equipment from crowded bolt, at this moment when self tapping, the chip of foundry goods just can excrete from groove, self-tapping operation can be made more laborsaving, quick, should from squeezing bolt self tapping thread out, can compact siro spinning technology own with bolt, fastening effect is better.

Present invention also offers a kind of and above-mentioned screw-driver mated from crowded bolt, comprise handle and bar portion, front end, bar portion is with the cutter head of the flat of mating with described straight groove, cutter head rear portion is hexagonal hexagonal prism with the cross section of mating with described hex hole, and described screw-driver inserts that described described cutter head enters in described straight groove in time squeezing the handle hole of bolt, described hexagonal prism is in hex hole.

And, on bolt head end face with straight groove and hex hole, an available word cutter head and Hexagon cutter head are opened, also the screw-driver operation simultaneously with a word cutter head and Hexagon cylinder can be adopted, common opening groove easily weares and teares and cannot open the problem of bolt, can be solved by replacing one word cutter head and Hexagon cutter head.If adopt the screw-driver operation simultaneously with a word cutter head and Hexagon cylinder, then can exert a force on straight groove and hexagonal hole, the torsion that certainly crowded bolt is born is larger, also can alleviate the torsion to single position simultaneously.

Accompanying drawing explanation

The present invention has following accompanying drawing:

The structural plan schematic diagram from crowded bolt that Fig. 1 provides for invention.

Fig. 2 is the end view of the bolt head of Fig. 1.

Fig. 3 is the partial schematic sectional view of Fig. 2.

Fig. 4 is the A-A cross-sectional schematic from crowded bolt in Fig. 1.

Fig. 5 be projection in Fig. 1 analyse and observe enlarged diagram.

Fig. 6 is the structural representation of the screw-driver from crowded bolt configuration in Fig. 1.

Embodiment

Drawings illustrate technological scheme of the present invention and embodiment, further describe each details and the working principle thereof of embodiment below more by reference to the accompanying drawings.

With reference to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, provided by the invention from squeezing bolt, comprise bolt head 1 and screw rod 2, described screw rod 2 outer surface is provided with outside thread 3, described outside thread 3 is provided with four grooves 4, and bottom groove 4, R angle is between 0.2-0.3, and described four grooves 4 are distributed on the outside thread 3 of screw rod 2 in the shape of a spiral, described bolt head 1 end handle hole 5 to be had, handle hole 5 comprises the straight groove 51 of bottom and the hex hole 52 on top.

With reference to Fig. 1, shown in Fig. 4, can be more firm with coordinating of bolt hole after shooting to make bolt, the rear end of described screw rod 2 is the diameter cylindrical body 21 concordant with outside thread 3 top, cylindrical body 21 outer surface is provided with the projection 22 of multiple inclined-plane or cambered surface along outside thread 3 tendency, the two sides of tail of protruding 22 is with latch 23, because screw rod 2 rear end is the diameter cylindrical body 21 concordant with outside thread 3 top, when bolt front portion is all shot, cylindrical body 21 can reverse along bolt and clamp-on in bolt hole, protruding 22 then snap in along the lower of externally threaded tendency from convex slope or cambered surface and finally reach protruding top, until whole cylindrical body 21 and protruding 22 enters in bolt hole, and the latch 23 of protruding 22 afterbodys blocks bolt hole sidewall inflexibly when bolt strained, prevent it from exiting.

With reference to shown in Fig. 1, Fig. 6, present invention also offers a kind of and described screw-driver mated from crowded bolt, comprise handle 6 and bar portion 7, front end, bar portion 7 is with the cutter head 71 of the flat of mating with described straight groove 51, cutter head 71 rear portion is hexagonal hexagonal prism 72 with the cross section of mating with described hex hole 52, and described screw-driver inserts that described described cutter head 71 enters in described straight groove 51 in time squeezing the handle hole 5 of bolt, described hexagonal prism 72 is in hex hole 52.

Claims

1. one kind is squeezed bolt certainly, comprise bolt head and screw rod, it is characterized in that: described screw rod outer surface is provided with outside thread, described outside thread is provided with four grooves, described four grooves are distributed on the outside thread of screw rod in the shape of a spiral, described bolt head end handle hole to be had, handle hole comprises the straight groove of bottom and the hex hole on top.

2. according to claim 1 from squeezing bolt, it is characterized in that: the rear end of described screw rod is the diameter cylindrical body concordant with outside thread top, cylindrical outer surface is provided with the projection of multiple inclined-plane or cambered surface along outside thread tendency, and protruding two sides of tail is with latch.

3. according to claim 1 and 2 from squeezing bolt, it is characterized in that: described bottom portion of groove R angle is between 0.2-0.3.

4. the screw-driver mated with bolt certainly crowded described in claim 1, comprise handle and bar portion, it is characterized in that: front end, bar portion is with the cutter head of the flat of mating with described straight groove, cutter head rear portion is hexagonal hexagonal prism with the cross section of mating with described hex hole, and described screw-driver inserts that described described cutter head enters in described straight groove in time squeezing the handle hole of bolt, described hexagonal prism is in hex hole.