CN204755517U

CN204755517U - Expanding screw bolts

Info

Publication number: CN204755517U
Application number: CN201520415851.2U
Authority: CN
Inventors: 庄文志; 吕牛冰; 张海鹏
Original assignee: SHENZHEN KEYUAN CONSTRUCTION GROUP CO Ltd
Current assignee: Shenzhen Keyuan Construction Group Co., Ltd.
Priority date: 2015-06-15
Filing date: 2015-06-15
Publication date: 2015-11-11
Anticipated expiration: 2025-06-15

Abstract

The utility model discloses an expanding screw bolts, the technical problem that solve are the fixed power that improves expanding screw bolts. The utility model discloses a screw puts in at the outside inflation cover of screw, inflation with the cover, with the screw have that the oblique cone facial features corresponds one serve and be equipped with along the radial first incision of setting of inflation cover outer wall, one side segmentation that first incision will expand the cover is the mutual separated first fin in both sides, the screw utensil screwed directly be equipped with and the nut, the inflation is equipped with along the radial second incision that sets up of inflation cover outer wall on sheatheeing the other end relative with first fin in, the second incision will expand the opposite side segmentation of cover for each other separated second fin of both sides, the quantity of second fin equals with the quantity of first fin, be equipped with in the screw with the through -hole of 1 coaxial setting on the screw, distribute on the outer wall of screw have with the grout hole of through -hole intercommunication. Compared with the prior art, fixed power when improving transverse vibration injures workman or pedestrian because of expanding screw bolts is loose by a crashing object after the equipment that prevents takes off.

Description

Setscrew

Technical field

The utility model relates to a kind of setscrew.

Background technique

At present, the setscrew with side tongue piece sold on the market, be all that tongue piece is set at 1/3rd places of the cylinder bottom of screw, the stack shell on cylinder top 2/3rds is smooth surface, because this setscrew can only bear longitudinal pulling force, and transverse vibration retention force is not enough, and mostly be composite structured due to present building structure, its metope material is various, there is foamed brick, common brick, concrete etc., in use because its function of setscrew is contacted with metope by fin, and due to gap also can be there is between metope and fin in it, when the successional transverse vibration of the on-stream generation of the equipment of being fixed, will produce loosening, long continuous shaking can make setscrew finally get loose completely, damage equipment, equipment also can be made to drop and to injure workman or pedestrian by a crashing object, bring the injury of life and property.

Summary of the invention

The purpose of this utility model is to provide a kind of setscrew, and the technical problem that solve improves the retention force of setscrew.

For solving the problem, the utility model realizes by the following technical solutions: a kind of setscrew, comprise screw and the expansion sleeve being enclosed within screw outside, one end of described screw has screw thread, the other end has tilted conical surface, on expansion sleeve, the first otch arranged along expansion sleeve outer wall radial direction is provided with the corresponding one end of tilted conical surface that has of screw, the side cutting of expansion sleeve is both sides disjunct first fin mutually by described first otch, threaded one of described screw tool is provided with and nut, the other end relative with the first fin on described expansion sleeve is provided with the second otch arranged along expansion sleeve outer wall radial direction, the opposite side cutting of expansion sleeve is both sides disjunct second fin mutually by described second otch, the quantity of the second fin is equal with the quantity of the first fin, the coaxial through hole arranged with screw 1 is provided with in described screw, through hole runs through the two ends of screw, the outer wall of screw is distributed with the grout hole be communicated with through hole.

The length of the second otch described in the utility model is equal with the length of the first otch.

Screw between nut described in the utility model and expansion sleeve is socketed with short sleeve, and the rear end of described short sleeve and the side of screws contact are provided with the first inclined-plane.

The inner side of the second fin described in the utility model is provided with the gradient second inclined-plane identical with the first surface slope.

The lower end inside of the first fin described in the utility model is provided with obtuse angle.

Ring washer is provided with between nut described in the utility model and short sleeve.

Annular opening spring washer is provided with between nut described in the utility model and ring washer.

The utility model compared with prior art, adopt the upper end of expansion sleeve that the first fin and the second fin are set, through hole is set in screw and the grout hole be connected with through hole is set on the periphery wall of screw, make when tightening nuts, make the tongue piece forced expansion on both sides, increase and concrete area of contact, and by slip casting machine, slurry is filled in the gap between fin and metope by through hole and grout hole, improve transverse vibration time retention force, prevent equipment because of setscrew get loose after injure workman or pedestrian by a crashing object.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation after the utility model squeezes into concrete.

Fig. 3 is the structural representation that the utility model turns nut cylinder is out of shape.

Fig. 4 is the structural representation after the utility model cylinder is badly deformed.

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

As shown in Figure 1, setscrew of the present utility model is made up of screw 1, nut 6 and expansion sleeve 2, one end of described screw 1 has screw thread, the other end has tilted conical surface, it is outside that expansion sleeve 2 is enclosed within screw 1, helical thread portion is arranged on the position of screw 1 termination, and tilted conical surface part is arranged on screw 1 terminal position, on the rear end of described expansion sleeve 2, one end of answering relative with the tilted conical surface of screw 1 has and by the first otch 9, the rear end of expansion sleeve 2 is divided into multiple both sides disjunct first fin 7 mutually, obtuse angle 13 is provided with in the inside of the first fin 7, the tilted conical surface part contact of obtuse angle 13 and screw 1, the front end of expansion sleeve 2 is provided with and the front end of expansion sleeve 2 is divided into quantity and both sides mutually disjunct second fin 8 equal with the first fin 7 quantity by the second otch 10, the length of this first otch 9 is equal with the length of the second otch 10, the inner side of the second section 8 is provided with the second inclined-plane 12 that the gradient is 40 °, annular opening spring washer 5, ring washer 4 and short sleeve 3 is from left to right provided with successively between expansion sleeve 2 and nut 6, the inclined-plane that the rear end of this short sleeve 3 is provided with the gradient first inclined-plane 11, first inclined-plane 11 equal with second inclined-plane 12 gradient and the second inclined-plane 12 contacts with each other,

Further, the coaxial through hole 14 arranged with screw 1 is provided with in screw 1, through hole 12 runs through the two ends of screw 1, the outer wall of screw 1 is distributed with the grout hole 15 be communicated with through hole 14, because setscrew is squeezed into after in the boring of metope, the first fin 7 on expansion sleeve and the second fin 8 contact with each other with the hole wall of boring, but wherein still there is certain space, setscrew can be made like this to have loosening possibility, therefore, through hole is set and slurry can be injected space by slip casting machine by grout hole, further increases fastness, prevent from loosening.

As Fig. 2, shown in Fig. 3 and Fig. 4, when setscrew being inserted through in the hole that percussion drill leaves on concrete structure, now expansion sleeve 2, in the segment insertion hole of short tube cover 3 and screw 1, rotating screw cap 6, external force is applied to short sleeve 3, second inclined-plane 12 and the first inclined-plane 11 phase mutual friction of expansion sleeve 2 upper end second fin 8, the second inclined-plane 12 on second fin 8 is outwards strutted, when continuing to turn screw, first fin 7 then struts through obtuse angle 13 by the tilted conical surface part of screw 1 lower end, such first fin 7 and the second fin 8 all spread and play fixation with concrete structure, in the through hole being forgotten screw 1 by slip casting machine, grouting makes slurry inject in hole through grout hole, make in the space of the opinion in the fin on expansion sleeve and hole, to fill full slurry, after slurry solidifies, nut 6 is backed out, split out annular opening spring washer 5 and ring washer 4, then will fixing equipment or object be needed to be arranged on screw 1, again ring washer 4 and annular opening spring washer 5 are loaded onto on screw 1, finally nut 6 is screwed on, complete installation.

The utility model, by slip casting, by the fill gaps between boring and fin, makes expansion sleeve can be entered one in hole and does not fix, improve the retention force of setscrew.

Claims

1. a setscrew, comprise screw (1) and be enclosed within the outside expansion sleeve (2) of screw (1), it is characterized in that: one end of described screw (1) has screw thread, the other end has tilted conical surface, on expansion sleeve (2), the first otch (9) arranged along expansion sleeve (2) outer wall radial direction is provided with the corresponding one end of tilted conical surface that has of screw (1), the side cutting of expansion sleeve (2) is both sides disjunct first fins (7) mutually by described first otch (9), threaded one of described screw tool is provided with and nut (6), the upper the other end relative with the first fin (7) of described expansion sleeve (2) is provided with the second otch (10) arranged along expansion sleeve (2) outer wall radial direction, the opposite side cutting of expansion sleeve (2) is both sides disjunct second fins (8) mutually by described second otch (10), the quantity of the second fin (8) is equal with the quantity of the first fin (7), the coaxial through hole (14) arranged with screw 1 is provided with in described screw (1), through hole (12) runs through the two ends of screw (1), the outer wall of screw (1) is distributed with the grout hole (15) be communicated with through hole (14).

2. setscrew according to claim 1, is characterized in that: the length of described second otch (10) is equal with the length of the first otch (9).

3. setscrew according to claim 2, it is characterized in that: the screw (1) between described nut (6) and expansion sleeve (2) is socketed with short sleeve (3), the side that the rear end of described short sleeve (3) contacts with screw (1) is provided with the first inclined-plane (11).

4. setscrew according to claim 3, is characterized in that: the inner side of described second fin (8) is provided with the gradient second inclined-plane (12) identical with the first inclined-plane (11) gradient.

5. setscrew according to claim 4, is characterized in that: the lower end inside of described first fin (7) is provided with obtuse angle (13).

6. setscrew according to claim 5, is characterized in that: be provided with ring washer (4) between described nut (6) and short sleeve (3).

7. setscrew according to claim 6, is characterized in that: be provided with annular opening spring washer (5) between described nut (6) and ring washer (4).