CN205244060U

CN205244060U - Novel expand end crab -bolt

Info

Publication number: CN205244060U
Application number: CN201520972011.6U
Authority: CN
Inventors: 杨维锐; 杨伟; 孙新波
Original assignee: Shanghai Xiang Rui Fastening Piece Co Ltd
Current assignee: Shanghai Xiang Rui Fastening Piece Co Ltd
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2016-05-18
Anticipated expiration: 2025-11-30

Abstract

The utility model discloses a novel expand end crab -bolt, the one end of this screw rod is held for the countersunk head, the screw rod has cup jointed high strength thickening sleeve pipe outward, the outer wall department that high strength thickening sleeve pipe is close to the one end of countersunk head end is equipped with round antiskid annular knurl, the antiskid is equipped with the round inflation recess of bending on the annular knurl, the high strength thickening sleeve pipe outer wall department at the anti -skidding annular knurl both ends of circle respectively is equipped with round antiskid recess, the bottom outlet drill bit that expands that the product cooperation is corresponding uses, can increase the inflation range by a wide margin, increase factor of safety, basically, reach the effect of built -in fitting. The product adopts has thickeied expandable casing to set up multichannel antiskid annular knurl and anti -skidding recess on the expandable casing outer wall, effectively increased the frictional force of expandable casing outer wall with the concrete pore wall, and, still having set up a plurality of anti -drop concave points on the expandable casing wall, the slip between expandable casing and the bolt is used for placing. The product surface is adopted the hot -galvanize to add baking finish technology and is handled for the corrosion -resistant ability of product is compared the existing product and is improved more than 10 times.

Description

Crab-bolt at the bottom of a kind of novel expansion

Technical field

The utility model relates to the technical field of crab-bolt, specifically crab-bolt, particularly its frame for movement at the bottom of a kind of novel expansion.

Background technology

Existing common crab-bolt coordinates concrete hole wall straight up and down, and expansion amplitude is little, and safety coefficient is lower, affected by environmental factors larger, poor stability. What existing common crab-bolt was used is that common steel are made, and material property is poor, and ultimate load is relatively low. The surface of existing common anchor spigot adopts common zincincation, and product corrosion resistance performance is not good. The threaded shank of existing common anchor spigot does not arrange separately reference mark, the uncontrollable assembling degree of depth.

Therefore still need the structure of existing crab-bolt to further improve. Overcome the shortcoming and defect existing in prior art.

Summary of the invention

The purpose of this utility model is to provide crab-bolt at the bottom of a kind of novel expansion, it adopts countersunk head to expand bottom structure, coordinates novel expansion bottom outlet drill bit, directly forms the boring of expanding end shape in a boring procedure, install smoothly thereby make to expand end crab-bolt, safety coefficient can reach pre-buried effect.

To achieve these goals, the technical solution of the utility model is: crab-bolt at the bottom of a kind of novel expansion, it is characterized in that: it comprises screw rod, one end of this screw rod is countersunk head end, the outer wall punishment of another of screw rod section is furnished with external screw thread, screw jacket is connected to a high strength thickening sleeve pipe, appeal screw thread place is connected with a hex nut, screw rod place between high strength thickening sleeve pipe and hex nut is socketed with a slice big flat washer, high strength thickening sleeve pipe is provided with the anti-skidding annular knurl of a circle near the outer wall place of one end of countersunk head end, anti-skidding annular knurl is provided with a circle expansion bending groove, the high strength thickening sleeve outer wall place of enclosing anti-skidding annular knurl two ends is respectively provided with a circle antiskid groove, the tube wall of high strength thickening sleeve pipe is provided with at least one slip-off preventing concave point, on the outer wall of high strength thickening sleeve pipe one end, offer some strip gaps from port along high strength thickening sleeve pipe axial direction.

The utility model provides a kind of novel countersunk head to expand end crab-bolt, coordinates the corresponding bottom outlet drill bit that expands to use, and can significantly increase expansion amplitude, increases safety coefficient, substantially reaches the effect of built-in fitting. Product adopts has thickeied expansion sleeve, and on expansion sleeve outer wall, be provided with the anti-skidding annular knurl of multiple tracks and antiskid groove, effectively increase the frictional force of expansion sleeve outer wall and concrete hole wall, and, also on expansion sleeve tube wall, be provided with multiple slip-off preventing concave points, for placing the slip between expansion sleeve and bolt, effectively improve safety coefficient, increase the stability of product. Product surface adopts galvanizing to add baking finish process processing, makes product corrosion resistance compare existing product and improves more than 10 times. Product screw rod place forms the adjustment notch line of black, contributes to improve construction precision and efficiency. Product global design is reasonable, is skillfully constructed, and has good practicality and security, and concrete outstanding substantive distinguishing features and marked improvement, is easy to apply compared to existing technologies.

Brief description of the drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model screw-rod structure schematic diagram.

Fig. 3 is the utility model high strength thickening sleeve structure schematic diagram.

Wherein:

1, screw rod;

2, countersunk head end;

3, external screw thread;

4, high strength thickening sleeve pipe;

5, hex nut;

6, big flat washer;

7, anti-skidding annular knurl;

8, antiskid groove;

9, slip-off preventing concave point;

10, strip gap;

11, straight burr embossing;

12, adjustment notch line;

13, expansion bending groove.

Detailed description of the invention

With reference to the accompanying drawings, the utility model is further described.

The utility model is crab-bolt at the bottom of a kind of novel expansion, it is different from prior art and is: it comprises screw rod 1, one end of this screw rod 1 is countersunk head end 2, the outer wall punishment of another section of screw rod 1 is furnished with external screw thread 3, the outer high strength thickening sleeve pipe 4 that is socketed with of screw rod 1, appeal screw thread 3 places are connected with a hex nut 5, screw rod 1 place between high strength thickening sleeve pipe 4 and hex nut 5 is socketed with a slice big flat washer 6, high strength thickening sleeve pipe 4 is provided with the anti-skidding annular knurl 7 of a circle near the outer wall place of one end of countersunk head end 2, anti-skidding annular knurl 7 is provided with a circle expansion bending groove 13, the high strength thickening sleeve pipe 4 outer wall places of enclosing anti-skidding annular knurl 7 two ends are respectively provided with a circle antiskid groove 8, the tube wall of high strength thickening sleeve pipe 4 is provided with at least one slip-off preventing concave point 9, on the outer wall of high strength thickening sleeve pipe 4 one end, offer some strip gaps 10 from port along high strength thickening sleeve pipe 4 axial directions.

In the specific implementation, on the pipe outer wall of described high strength thickening sleeve pipe 4, be also provided with a circle straight burr embossing 11.

In the specific implementation, the bar wall of described screw rod 1 is provided with a circle adjustment notch line 12, and further, this adjustment notch line is a circle black adjustment notch line.

In the specific implementation, the diameter of described slip-off preventing concave point 9 is 1.5mm-2.5mm, and the degree of depth of slip-off preventing concave point 9 is 0.2mm-0.5mm, this slip-off preventing concave point can effectively prevent between expansion sleeve and bolt first to slide.

In the specific implementation, the groove width of described expansion bending groove 8 is 1.5mm-2.5mm.

In the specific implementation, the groove width of described antiskid groove 8 is 1.5mm-2.5mm.

Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that the concrete enforcement of the utility model is confined to above-mentioned these explanations. For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.

Claims

1. crab-bolt at the bottom of a novel expansion, it is characterized in that: it comprises screw rod (1), one end of this screw rod (1) is countersunk head end (2), the outer wall punishment of another section of screw rod (1) is furnished with external screw thread (3), the outer high strength thickening sleeve pipe (4) that is socketed with of screw rod (1), appeal screw thread (3) locates to be connected with a hex nut (5), screw rod (1) between high strength thickening sleeve pipe (4) and hex nut (5) locates to be socketed with a slice big flat washer (6), high strength thickening sleeve pipe (4) is provided with the anti-skidding annular knurl of a circle (7) near the outer wall place of one end of countersunk head end (2), anti-skidding annular knurl (7) is provided with a circle expansion bending groove (13), high strength thickening sleeve pipe (4) the outer wall place of enclosing anti-skidding annular knurl (7) two ends is respectively provided with a circle antiskid groove (8), the tube wall of high strength thickening sleeve pipe (4) is provided with at least one slip-off preventing concave point (9), on the outer wall of high strength thickening sleeve pipe (4) one end, thicken sleeve pipe (4) axial direction from port along high strength and offer some strip gaps (10).

2. crab-bolt at the bottom of a kind of novel expansion according to claim 1, is characterized in that: on the pipe outer wall of described high strength thickening sleeve pipe (4), be also provided with a circle straight burr embossing (11).

3. crab-bolt at the bottom of a kind of novel expansion according to claim 1, is characterized in that: the bar wall of described screw rod (1) is provided with a circle adjustment notch line (12).

4. crab-bolt at the bottom of a kind of novel expansion according to claim 1, is characterized in that: the diameter of described slip-off preventing concave point (9) is 1.5mm-2.5mm, and the degree of depth of slip-off preventing concave point (9) is 0.2mm-0.5mm.

5. crab-bolt at the bottom of a kind of novel expansion according to claim 1, is characterized in that: the groove width of described expansion bending groove (8) is 1.5mm-2.5mm.

6. crab-bolt at the bottom of a kind of novel expansion according to claim 1, is characterized in that: the groove width of described antiskid groove (8) is 1.5mm-2.5mm.