Anchor bolt assembly

Abstract

The utility model provides an anchor bolt assembly which comprises a screw rod, an expansion nut, an expansion sleeve, a flat washer and a fixing nut, the expansion nut, the expansion sleeve, the flat washer and the fixing nut are sequentially connected to the screw rod in a sleeved mode from front to back, and the expansion nut is of a special-shaped structure with the cylindrical front portion and the conical rear portion. Grooves are formed in the outer wall of the expansion nut in a circumferential array mode, and notches are formed in the front end face of the expansion nut in a circumferential array mode to form a sawtooth-shaped end face. The number and the positions of the grooves correspond to those of the notches. According to the anchor bolt assembly, the conical expansion nut can be prevented from rotating along with the anchor bolt assembly in the construction process, and the anchoring construction efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to building construction equipment technical field, concretely is a kind of anchor assembly. BACKGROUND

[0002] Anchor bolt is used for the threaded fastener for fixing installation in component base, wherein expansion anchor bolt usually includes screw rod and the conical expansion nut, expansion sleeve, flat washer, fixed nut that are sequentially sleeved on screw rod from front to back, when installing, rotate screw rod and make the expansion nut that is threaded with it move back into expansion sleeve, conical expansion nut makes expansion sleeve radially expand and extrude outward, so that anchor bolt is anchored in component base, to realize the fixed installation of equipment.

[0003] In construction application, it is found that the existing conical expansion nut is smooth, and the grip is insufficient in embedded construction process, and it is easy to appear with rotation, which affects the expansion nut into expansion sleeve for expansion, and reduces construction efficiency. For example, the detachable expansion anchor bolt disclosed in the existing patent CN206904009U includes anchor bolt body and expansion sleeve pipe sleeved on anchor bolt body, second external thread is arranged on anchor bolt body, second nut (equivalent to conical expansion nut) with second internal thread is arranged on second external thread, and second nut is circular truncated cone. The second nut in the patent is circular truncated cone with smooth outer wall, and no structure is arranged to prevent rotation.

[0004] Based on the above problems, an anchor assembly needs to be designed to overcome the problem that the conical expansion nut affects construction efficiency due to rotation in construction process. SUMMARY

[0005] The utility model provides a kind of anchor assembly, can avoid the rotation of conical expansion nut in construction process, effectively improve anchoring construction efficiency.

[0006] To achieve the above technical purpose, reach the above technical effect, the utility model solves the above problems by the following technical scheme:

[0007] An anchor assembly includes screw rod and expansion nut, expansion sleeve pipe, flat washer, fixed nut that are sequentially sleeved on screw rod from front to back, the expansion nut is special-shaped structure with front cylindrical and rear conical;The recess is opened along the circumferential array on the outer wall of the expansion nut, and the notch along the circumferential array is opened on the front end face of the expansion nut to form sawtooth end face;The number and setting position of the recess and notch are corresponding.

[0008] In the above scheme, the expansion nut adopts a combined structure of a cylindrical shape and a conical shape, which not only ensures the expansion function of the conical section, but also ensures better strength through the cylindrical structure. The outer wall of the expansion nut is provided with equidistant grooves, which increase the rotation resistance of the expansion nut and the installation hole wall, prevent the expansion nut from rotating during construction, and at the same time, the front end of the expansion nut is provided with a notch to form a sawtooth end face, and the sawtooth structure can improve the grip of the expansion nut, further prevent the expansion nut from rotating during construction, and make the scheme achieve better construction effect.

[0009] Further, the screw rod is provided with front and rear threads as an anchoring working end and a fixing working end, respectively, and a circular isolation feature with a diameter larger than that of the two working ends is connected between the anchoring working end and the fixing working end. The thread diameters of the anchoring working end and the fixing working end are the same or different, and the thread lengths of the anchoring working end and the fixing working end are the same or different.

[0010] The existing screw rod usually adopts a single-thread screw rod without differentiated design for anchoring work and fixing work. The scheme divides the screw rod into an anchoring working end and a fixing working end through a circular isolation feature, and the threads of the two working ends can be designed differently according to the requirements of anchoring and fixing workpieces.

[0011] Further, the expansion sleeve comprises a primary pipe body and a secondary pipe body arranged in front and back; the tail part of the primary pipe body is a conical structure matched with the front end of the secondary pipe body for distraction, and an annular boss is arranged on the inner wall of the primary pipe body corresponding to the conical structure; both the primary pipe body and the secondary pipe body are provided with notch features, the primary pipe body is provided with two primary notch features arranged in an array along the circumference, and the secondary pipe body is provided with four secondary notch features arranged in an array along the circumference.

[0012] Further, the groove provided on the outer wall of the expansion nut is a circular arc groove.

[0013] The advantages and effects of the utility model are:

[0014] 1. The expansion nut of the anchor assembly is combined with the outer wall groove through the front end notch, which improves the rotation resistance of the side wall and end face of the expansion nut and the installation hole, effectively overcomes the rotation problem of the expansion nut during construction, and achieves better construction effect.

[0015] 2. The scheme is designed according to the requirements of anchoring work and fixing work, the screw rod is provided with front and rear threads as an anchoring working end and a fixing working end, respectively, and the thread lengths and diameters of the two working ends can be designed differently according to the requirements of anchoring and fixing workpieces.

[0016] 3. The expansion sleeve in this design adopts a combined structure consisting of two stages of tubing. The expansion of the two stages of tubing ensures the expansion and compression area with the installation hole wall, thereby improving anchoring stability. Simultaneously, the annular boss on the inner wall of the first-stage tubing increases the strength of the conical structure, ensuring the compression and expansion of the first-stage tubing over the second-stage tubing.

[0017] The two-stage tube body uses two and four notches respectively, which can ensure the expansion performance of the expansion sleeve step by step. The two notches in the front tube body have both a expansion effect and ensure the expansion strength of the second-stage tube body; the rear tube body increases to four notches to ensure that the second-stage tube body can effectively expand outward. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 for Figure 1 Exploded view of the structure shown;

[0020] Figure 3 This is a schematic diagram of the expansion nut structure;

[0021] Figure 4 This is a schematic diagram of the internal structure of the expansion sleeve.

[0022] Drawing number identifiers: 1. Screw, 11. Anchoring working end, 12. Fixed working end, 13. Circular isolation feature, 2. Expansion nut, 21. Groove, 22. Notch, 3. Expansion sleeve, 31. Primary tube body, 311. Conical structure, 312. Annular boss, 313. Primary notch feature, 32. Secondary tube body, 321. Secondary notch feature, 4. Flat washer, 5. Fixing nut. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0024] The anchor bolt assembly described in this embodiment is shown in the attached figure. Figure 1 , 2 As shown, it includes a screw 1 and, from front to back, an expansion nut 2, an expansion sleeve 3, a flat washer 4, and a fixing nut 5, which are sequentially fitted onto the screw 1. That is, the installation end of the expansion nut 2 is the front end, and the installation end of the fixing nut 5 is the rear end.

[0025] As attached Figure 3 As shown, the expansion nut 2 adopts an irregular structure with a cylindrical front and a conical rear. Circular arc-shaped grooves 21 are arranged along the circumference of the outer wall of the expansion nut 2. A notch 22 is provided at a position corresponding to the groove 21 on the front end face. The notches 22 arranged along the circumference of the end face form a sawtooth end face. The number of grooves 21 and notches 22 are the same, and their positions correspond.

[0026] As shown in the accompanying Figure 1 , 2 , the screw rod 1 is provided with front and rear threads as anchoring working end 11 and fixing working end 12 respectively, and the circular isolation feature 13 is fixedly sleeved between the anchoring working end 11 and the fixing working end 12, and the diameter of the circular isolation feature 13 is larger than that of the two working ends. In the embodiment, the thread length and the thread diameter of the anchoring working end 11 are different from those of the fixing working end 12, the anchoring working end is M10*100, and the fixing working end is M8*50.

[0027] As shown in the accompanying Figure 4 , the expansion sleeve 3 comprises a primary pipe body 31 and a secondary pipe body 32 arranged in front and back, the tail of the primary pipe body 31 is a tapered structure 311, and in working, the tapered structure 311 of the tail of the primary pipe body 31 enters the front end of the secondary pipe body 32 and expands and extrudes the hole wall. The inner wall of the primary pipe body 31 is provided with an annular boss 312 at the position corresponding to the tapered structure 311, so as to ensure the expansion strength of the tapered structure 311 to the secondary pipe body 32. Meanwhile, two primary notch features 313 are arranged in an array along the circumference of the primary pipe body 31, and four secondary notch features 321 are arranged in an array along the circumference of the secondary pipe body 32. The primary notch features 313 have the effect of outward expansion and ensure that the primary pipe body 31 has a certain mechanical strength to expand the secondary pipe body 32. The increase of the secondary pipe body 32 to four notches can ensure that the secondary pipe body 32 is effectively expanded outward, and the anchoring stability is improved.

[0028] When the anchor bolt assembly is used, the assembled anchor bolt assembly is placed in the pre-drilled mounting hole, the expansion nut 2 is inserted into the bottom end of the mounting hole, and the expansion nut 2 will not rotate in the rotation process of the screw rod 1 due to the arrangement of the front end notch 22 and the outer wall groove 21. In the installation, the screw rod 1 is rotated forward to move the expansion sleeve 3 to the expansion nut 2, and with the rotation of the screw rod 1, the expansion nut 2 gradually expands the expansion sleeve 3 and extrudes the hole wall, until the circular isolation feature 13 of the screw rod 1 is pressed against the mounting hole, and the anchor bolt is anchored in the component base.

[0029] After the anchor bolt is anchored, the load equipment mounting hole is matched with the fixing working end 12, the flat washer is assembled, and the fixing nut is tightened, so that the equipment is fixed and installed.

[0030] The embodiments of the utility model are described in detail in combination with the drawings, but the utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and modifications of these embodiments without departing from the principles and spirits of the utility model still fall within the protection scope of the utility model.

Claims

1. An anchor assembly, comprising a screw rod (1) and, in sequence from front to back, a expansion nut (2), an expansion sleeve (3), a flat washer (4), and a fixing nut (5) sleeved on the screw rod (1), characterized in that: the expansion nut (2) is of a special shape with a cylindrical front part and a tapered rear part; the outer wall of the expansion nut (2) is provided with grooves (21) arranged in an array along the circumference, and the front end face of the expansion nut (2) is provided with notches (22) arranged in an array along the circumference to form a sawtooth-shaped end face; the number and position of the grooves (21) and the notches (22) correspond to each other.

2. An anchor assembly according to claim 1, wherein: The screw rod (1) is provided with two threads at the front and rear parts, which are used as an anchoring working end (11) and a fixing working end (12), respectively; the circular isolation feature (13) with a diameter larger than that of the working ends is sleeved between the anchoring working end (11) and the fixing working end (12).

3. An anchor assembly according to claim 2, wherein: The threads of the anchoring working end (11) and the fixing working end (12) are the same or different in diameter, and the lengths of the threads of the anchoring working end (11) and the fixing working end (12) are the same or different.

4. An anchor assembly according to claim 1, wherein: The expansion sleeve (3) comprises a primary pipe body (31) and a secondary pipe body (32) arranged in sequence from front to back; the tail part of the primary pipe body (31) is a tapered structure (311) matched with the front end of the secondary pipe body (32) to expand; the inner wall of the primary pipe body (31) is provided with an annular boss (312) at a position corresponding to the tapered structure (311); ​ Both the primary pipe body (31) and the secondary pipe body (32) are provided with notch features; the primary pipe body (31) is provided with two primary notch features (313) arranged in an array along the circumference, and the secondary pipe body (32) is provided with four secondary notch features (321) arranged in an array along the circumference.

5. An anchor assembly according to claim 1, wherein: The grooves (21) provided on the outer wall of the expansion nut (2) are circular arc grooves.

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