Expansion bolt sleeve with multiple clamping positions and expansion bolt

Abstract

An expansion bolt sleeve with multiple clamping positions comprises an expansion sleeve with an expansion piece, the edges of the two sides, close to the base portion, of the expansion piece are provided with a front concave notch and a rear concave notch, and a first clamping position is arranged between the front concave notch and the rear concave notch on the same side. A stamping pattern is arranged in the middle of the near base part, and is positioned in an interval range between the foremost end of the front concave notch and the rearmost end of the rear concave notch; the rear end of each expansion piece is provided with at least one punching piece, and the punching pieces are in a folded shape from the base part to the front end. According to the expansion bolt sleeve, the expansion piece has good expansibility, the clamping positions clamped with the inner wall of the hole are arranged on the expansion piece and the expansion sleeve, the clamping effect of the expansion bolt with the expansion bolt sleeve and a target mounting hole in the using process can be effectively improved, and dislocation between the expansion bolt and the hole can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of expansion bolts, and particularly relates to an expansion bolt sleeve with multiple clamping positions and an expansion bolt with the expansion bolt sleeve. BACKGROUND

[0002] Expansion bolts are a kind of fastener commonly used in building engineering. The expansion bolt expands the head by driving the screw rod, so that the expansion pieces are separated, and the expansion pieces are clamped with the inner wall of the target mounting hole to provide friction force, so that the expansion bolt and the target mounting hole are combined firmly, thereby firmly fixing the two parts or providing the mounting position of the external part and the expansion bolt.

[0003] Generally, the mounting firmness of the expansion bolt and the target mounting hole depends on the clamping firmness of the expansion pieces of the expansion bolt sleeve and the inner wall of the hole. More and more reasonable clamping positions can effectively improve the clamping firmness of the two. SUMMARY

[0004] The utility model discloses a kind of expansion bolt sleeves with multiple clamping positions, and expansion bolt with the expansion bolt sleeve, its expansion piece has good easy expansion, by expansion piece and expansion sleeve pipe have multiple clamping positions with the hole inner wall, it can effectively enhance the clamping effect of expansion sleeve pipe and target mounting hole, can effectively avoid dislocation between expansion bolt and hole.

[0005] To achieve the above object, the utility model uses the following technical means to be implemented:

[0006] An expansion bolt sleeve with multiple clamping positions includes an expansion sleeve pipe with expansion pieces, the expansion pieces have front and rear recessed notches on both sides near the base, and a first clamping position is arranged between the front and rear recessed notches on the same side. A stamping line is arranged in the middle of the base, and the stamping line is located in the interval between the front end of the front recessed notch and the rear end of the rear recessed notch. At least one punched piece is arranged at the rear end of each expansion piece, and the punched piece is convergent from the base to the front end.

[0007] Further, the front recessed notches and the rear recessed notches are mutually enclosed in any one or two combinations of diamond, square, ellipse, olive, and circle.

[0008] Further, the front recessed notches and the rear recessed notches are mutually enclosed in dumbbell structure, and the front recessed notches and the rear recessed notches are mutually enclosed in any one or two combinations of notched diamond, notched square, notched ellipse, notched olive, and notched circle.

[0009] Further, the rear end of each expansion sheet is provided with at least 2-4 punching sheets in an array.

[0010] Further, the converging end of the punching sheet is in the form of inward bending and / or horizontal bending and / or outward bending.

[0011] Further, the punching sheet is in the form of one or more of trapezoid, triangle and arc.

[0012] Further, the rear end punching line of the punching line is at least partially collinear with the line connecting the most concave points of the two rear concave notches and / or the front end punching line of the punching line is at least partially collinear with the line connecting the most concave points of the two front concave notches.

[0013] Based on the above-mentioned expansion bolt sleeve with multiple clamping positions, it can be applied to the existing expansion bolt, by inserting the expansion bolt with the expansion bolt sleeve into the target mounting hole, the relative movement of the screw rod and the nut causes the expansion piece to be expanded by the expansion piece, so that the expansion piece can be clamped to the inner wall of the target mounting hole, and the fixed installation of the expansion bolt can be realized.

[0014] Further, it also includes a screw rod with a driving end at the rear end and a bolt expansion head, the threaded part of the screw rod extends from the front end to the rear end and beyond the front end of the front concave notch, and the bolt expansion head is threadedly connected with the threaded part; the surface of the bolt expansion head is provided with at least one abutting protrusion interfering with any expansion sheet.

[0015] Further, the abutting protrusion is a tooth-shaped protrusion arranged in a circumferential array on the surface of the bolt expansion head.

[0016] The utility model has at least the following advantages:

[0017] The expansion bolt sleeve has high universality, can be applied to the screw rod positioning and retaining type or the expansion bolt of the expansion bolt, and through reasonable arrangement of the front and rear concave notches and the punching sheet, multiple clamping positions can be formed, the overall stability between the clamping hole inner walls of the expansion bolt sleeve can be improved, and through adjustment of the form of the punching sheet, the fixing effect of the hole inner walls of different materials can also be improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the schematic view of the non-expanding state of the utility model embodiment 1;

[0019] Figure 2 is the expanding state schematic view of the utility model embodiment 1;

[0020] Figure 3 is the expanding state schematic view of the utility model embodiment 2;

[0021] Figure 4is a schematic view of embodiment 3 of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0023] Embodiment 1

[0024] Please see Figures 1-2 , which is a schematic view of the expansion bolt with the multi-card position expansion bolt sleeve 10 loaded to form a screw positioning and retaining type expansion bolt, which further includes a screw rod 22 with a hexagonal nut head 21 at the rear end, a bolt expansion head 30, the surface of the bolt expansion head 30 is provided with a circumferentially arrayed toothed protrusion 31, specifically:

[0025] The front end of the expansion sleeve has three expansion sheets 11, the front end of each expansion sheet 11 is a trapezoidal portion 12 that converges towards the front end, each expansion sheet 11 has a front recessed notch 131 and a rear recessed notch 132 near the two side edges of the base portion, the two adjacent front recessed notches 131 and the two adjacent rear recessed notches 132 are mutually enclosed to form a dumbbell-shaped structure, and the two adjacent front recessed notches 131 are mutually enclosed to form an obliquely placed notch rhombus, and the two adjacent rear recessed notches 132 are mutually enclosed to form an obliquely placed notch rhombus, a first clamping position 141 is formed between the front recessed notch 131 and the rear recessed notch 132 on the same side, and a second clamping position 142 is formed from the front recessed notch 131 to the front end of the expansion sheet 11.

[0026] The stamping line 15 is arranged in the middle of the proximal end of the expansion sheet 11, and the stamping line 15 is arranged in the range between the front end of the front concave notch 131 and the rear end of the rear concave notch 132. The front end stamping line 151 and the rear end stamping line 152 of the stamping line 15 can cooperate with the front concave notch 131 and the rear concave notch 132, so that the expansion sheet 11 can be bent along the line connecting the front end stamping line 151 and the rear end stamping line 152 of the front concave notch 131 and / or the rear concave notch 132. In the embodiment, the rear end stamping line 152 of the stamping line 15 is in an arc shape protruding towards the rear end, and the two endpoints of the arc are collinear with the line A-A connecting the two concave points of the two rear concave notches 132. Therefore, when the bolt expansion head 30 expands the expansion sheet 11, it is easier to bend along the line connecting the two concave points of the two rear concave notches 132 and the rear end stamping line 152. Moreover, the line connecting the two concave points of the two rear concave notches 132 and the short point of the rear end stamping line 152 is not collinear with the arc-shaped rear end stamping line 152. This avoids the bending of the proximal end of the expansion sheet 11, and can reasonably improve the structural strength of the proximal end of the expansion sheet 11.

[0027] The three stamping pieces 16 are arranged in an array at the rear end of the expansion sheet 11. The stamping piece 16 is in a triangular shape converging from the proximal end to the distal end, and the converging end is in a shape of inwardly bending. Through this design, the expansion bolt sleeve 10 can provide a clamping part with the inner wall of the hole, so as to avoid the relative sliding between the rear end of the expansion bolt sleeve 10 and the rear end of the target installation hole due to the accidental cutting and planing of part of the inner wall of the hole during the process of placing the expansion bolt into the target installation hole, thereby improving the overall stability between the expansion bolt sleeve 10 and the inner wall of the hole, and being suitable for target installation holes of different types of materials such as wood, plastic, cement, brick, metal, etc., and having high versatility. More preferably, the stamping piece can be arranged in a shape of gradually increasing protrusion degree along the direction from the proximal end to the distal end, and the fixing effect is more optimal.

[0028] After the expansion bolt is inserted into the target installation hole, the screw rod 22 is rotated by rotating the hexagonal nut head 21 at the rear end of the screw rod 22, so that the screw rod 22 can rotate along the rotation axis in the expansion bolt sleeve 10. In this embodiment, since the surface of the bolt expansion head 30 is provided with circumferentially arranged teeth 31, and the first clamping position 141 and the second clamping position 142 of each expansion sheet 11 interfere with each other, the bolt expansion head 30 gradually moves along the threaded portion 23 to the rear end by threadedly cooperating with the threaded portion 23, so that the bolt expansion head 30 gradually expands each expansion sheet 11, and the expansion sheet 11 is tightly pressed against the inner wall of the hole. The first clamping position 141 and the second clamping position 142 on the same straight line can form a multi-directional clamping part with the inner wall of the hole, and can especially clamp the particle protruding parts on the inner wall surface of the hole, such as concrete, masonry, etc. Since the threaded portion 23 of the screw rod 22 extends from the front end to the rear end and beyond the frontmost end of the front recess gap 131, the bolt expansion head 30 can move to the position of each rear recess gap 132, and each expansion sheet 11 is fully opened.

[0029] The expansion bolt of the present embodiment can be installed in the expansion bolt sleeve 10, and the user can rotate the driving section to make the screw rod 22 rotate in the expansion bolt sleeve 10. Therefore, in the case where the abutting protrusion of the bolt expansion head 30 interferes with the expansion sheet 11, the bolt expansion head 30 threadedly cooperates with the threaded portion 23, and the first clamping position 141 and the second clamping position 142 and the punching sheet 16 clamp the front end and the rear end of the expansion bolt sleeve 10, so that the expansion bolt can be firmly clamped and locked in the target installation hole.

[0030] Embodiment 2

[0031] As shown in Figure 3 Based on the expansion bolt of embodiment 1, in this embodiment, the folded end of each triangular punching sheet 16' is designed to be outwardly bent. During the process of inserting the expansion bolt into the target installation hole of hard material, when the target installation hole and the expansion bolt sleeve 10' are relatively tight and need to be hammered into the expansion bolt, part of the punching sheet 16' may press the particle protruding parts on the inner wall surface of the hole, such as concrete, masonry, etc., and further outwardly warp. At this time, the punching sheet 16' further outwardly flips to better clamp into the inner wall of the hole. Compared with the scheme of embodiment 1, the clamping effect of the rear end of the expansion bolt sleeve 10' and the target installation hole is more reliable.

[0032] Embodiment 3

[0033] As shown in Figure 4As shown, based on the expansion bolt of example 1, in the present example, the bolt expansion head 30" is arranged at the front end of the screw rod 22", the threaded portion 23" of the screw rod 22" extends from the front end to the rear end, and the nut 24" is sleeved with the threaded portion 23" to form a screw rod extraction type expansion bolt; two adjacent front recessed notches 131" are arranged to form an olive shape, two adjacent rear recessed notches 132" are arranged to form an olive shape, the arc line connecting the two end points and the most concave points of the two olive-shaped rear recessed notches 132" is collinear, and each punching piece 16" has a trapezoidal structure that converges from the rear end to the front end.

[0034] Compared with the technical solution of example 1, in the present example, the threaded portion 23" is arranged at the rear end, which can gradually move the screw rod 22" from the front end to the rear end when rotating the nut 24", and the bolt expansion head 30" at the front end of the screw rod 22" gradually moves from the front end to the rear end and expands each support piece. At this time, the threaded portion 23" exposed outside the expansion sleeve can be used as a connecting part for threaded connection with external components. Compared with the technical solution of example 1, the present solution has higher assembly adaptability.

[0035] Each punching piece 16" has a trapezoidal structure that converges from the rear end to the front end, which improves the size of the contact point between the front end of each punching piece 16" and the inner wall of the hole compared with the triangular punching piece 16" of example 1. The two adjacent front recessed notches 131" are arranged to form an olive shape, and the two adjacent rear recessed notches 132" are arranged to form an olive shape, which is a non-dumbbell-shaped notch structure. Based on this arrangement, compared with the solution of example 1, the area of the first clamping position 141" in the circumferential direction is improved, the clamping effect is good, and the fixed installation between the expansion piece 11 and the target installation hole can be realized.

[0036] Although the embodiments of the present application have been described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An expansion bolt sleeve having multiple card positions comprising an expansion sleeve having expansion tabs, characterized by: The expansion piece has front and rear recessed notches on both sides near the base, and a first locking position is provided between the front and rear recessed notches on the same side; a stamping pattern is provided near the middle of the base, and the stamping pattern is located within the range between the front end of the front recessed notch and the rear end of the rear recessed notch; each expansion piece has at least one punching piece at its rear end, and the punching piece is tapered from the base to the front end.

2. The expansion bolt sleeve with multiple seating as claimed in claim 1, wherein: The two adjacent anterior concave notches and the two adjacent posterior concave notches enclose each other in a shape that is rhomboid, square, elliptical, olive-shaped, or circular, or a combination of two of these shapes.

3. The expansion bolt sleeve with multiple seating as claimed in claim 1, wherein: The two adjacent anterior concave notches and the two adjacent posterior concave notches enclose each other to form a dumbbell-shaped structure, and the two adjacent anterior concave notches and the two adjacent posterior concave notches enclose each other to form any one or a combination of two of the following: notch rhombus, notch square, notch ellipse, notch olive shape, and notch circle.

4. The multi-position expansion bolt sleeve of claim 1 wherein: Each expansion plate has at least 2-4 punching blades arranged in a row at its rear end.

5. The expansion bolt sleeve with multiple locking positions as described in claim 4, characterized in that: The converging end of the punched sheet is bent inward and / or horizontal and / or outward.

6. The multi-position expansion bolt sleeve of claim 1 wherein: The punched sheet is in one or more of the following shapes: trapezoidal, triangular, and arc-shaped.

7. A multi-socketed expansion bolt sleeve as claimed in any one of claims 1 to 6, wherein: The rear stamping line of the stamping pattern is at least partially collinear with the line connecting the deepest points of the two rear recessed notches and / or the front stamping line of the stamping pattern is at least partially collinear with the line connecting the deepest points of the two front recessed notches.

8. An expansion bolt, characterized by: It includes the expansion bolt sleeve with multiple locking positions as described in any one of claims 1-7.

9. An expansion bolt as claimed in claim 8 wherein: It also includes a screw with a drive end at the rear end and a bolt expansion head. The threaded portion of the screw extends from the front end to the rear end and exceeds the front end of the front recess notch. The bolt expansion head is threadedly engaged with the threaded portion. The surface of the bolt expansion head is provided with at least one abutting protrusion that interferes with any expansion plate.

10. An expansion bolt as claimed in claim 9 wherein: The abutting protrusions are tooth-shaped protrusions arranged in a circumferential array on the surface of the bolt expansion head.

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