Expansion bolt for modular integrated building top plate

Abstract

The utility model relates to the technical field of modular integrated buildings, in particular to an expansion bolt for a modular integrated building top plate. The expansion bolt comprises a screw, a fixing part, a guide block, an expansion sleeve and a retaining part, the fixing part, the guide block and the screw are sequentially connected, the fixing part is partially located outside the mounting hole, the end face of the fixing part abuts against the top end of the top plate, the bottom end of the screw extends out of the mounting hole, the expansion sleeve sleeves the screw and is slidably connected with the screw, and a plurality of vertical openings are formed in the upper end of the expansion sleeve. The upper portion of the expansion sleeve can slide in the inclined direction of the guide block to open the vertical opening to abut against the inner wall of the mounting hole, the screw is sleeved with the maintaining piece, the maintaining piece abuts against the bottom end of the expansion sleeve, and the maintaining piece can push the expansion sleeve to slide along the screw and maintain the expansion sleeve. Due to the fact that the fixing piece partially abuts against the top end of the top plate, the equipment is connected with the bottom end of the screw rod, tension and bearing force are provided for the expansion bolt, when the expansion bolt is connected with the equipment, installation is firm, the expansion bolt does not fall off in the using process and the transportation process, and safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of modular integrated building, especially relates to a expansion bolt for modular integrated building roof. BACKGROUND

[0002] With the industrialization transformation of the building industry, the assembly type technology develops deeply, especially the modular integrated building, the technical application of fixing equipment on the indoor roof is applied to the modular integrated building.

[0003] At present, the combination of rubber plug and screw is used to fix other equipment on the roof of the modular integrated building, but the roof of the modular integrated building is relatively thin, the length of the rubber plug and screw used on the roof is relatively short, so when the rubber plug and screw are connected with the equipment such as lamps and fans with weight, the connection with the equipment is not firm, which further leads to the easy falling off during the transportation of the modular building and the use of the rubber plug and screw, and the low safety. At the same time, in order to avoid falling off during transportation, on-site construction is carried out, but on-site construction will lead to great construction difficulty, and cross construction with decoration, which prolongs the construction time. SUMMARY

[0004] (I) Technical problem to be solved

[0005] In view of the above shortcomings and deficiencies of the prior art, the utility model provides an expansion bolt for modular integrated building roof, which solves the technical problems of easy falling off when connected with the equipment, low safety, great construction difficulty and long construction time.

[0006] (II) Technical scheme

[0007] In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises:

[0008] The utility model embodiment provides an expansion bolt for modular integrated building roof, the expansion bolt can be arranged on the roof of the modular integrated building, the roof is provided with a mounting hole matched with the expansion bolt; the expansion bolt comprises a screw rod, a fixing piece, a guide block, an expansion sleeve and a retaining piece, the fixing piece, the guide block and the screw rod are connected in sequence, the fixing piece is partially located outside the mounting hole and the end face abuts against the top end of the roof, the bottom end of the screw rod extends out of the mounting hole; the expansion sleeve is sleeved on the screw rod and is in sliding connection with the screw rod, a plurality of vertical openings are formed in the upper end of the expansion sleeve, the upper part of the expansion sleeve can slide along the inclined direction of the guide block to open the vertical openings of the expansion sleeve and abut against the inner wall of the mounting hole, the retaining piece is sleeved on the screw rod and abuts against the bottom end of the expansion sleeve, and the retaining piece can push the expansion sleeve to slide along the screw rod and keep.

[0009] Preferably, the fastener includes a connecting hook portion and a connecting portion; the hook portion is located outside the mounting hole and its end face abuts against the top of the top plate, and the connecting portion is located inside the mounting hole and connected to the guide block.

[0010] Preferably, the guide block has a frustum structure, with its top end connected to the connecting part of the fixing member and its bottom end connected to the screw; the diameter of the top end of the guide block is greater than the diameter of the bottom end of the guide block, which is greater than the diameter of the screw.

[0011] Preferably, the retainer is a nut; the screw includes a smooth rod segment and a threaded rod segment connected together; the expansion sleeve is fitted onto the smooth rod segment of the screw and is slidably connected to the smooth rod segment, and the nut is threadedly connected to the threaded rod segment.

[0012] Preferably, the expansion sleeve has multiple circular holes, and each circular hole is connected to the bottom end of the vertical opening.

[0013] Preferably, there are two round holes and two vertical openings.

[0014] Preferably, it also includes a washer unit; the washer unit is sleeved on the threaded section of the screw, and the washer unit is located between the expansion sleeve and the retainer.

[0015] Preferably, the washer unit includes a flat washer and a spring washer, wherein the top end of the flat washer abuts against the bottom end of the expansion sleeve, and the top end of the spring washer abuts against the bottom end of the flat washer.

[0016] Preferably, the diameter of the mounting hole is larger than the diameter of the top of the guide block and smaller than the diameter of the flat washer.

[0017] Preferably, the expansion bolts are made of stainless steel.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This utility model relates to expansion bolts for modular integrated building roof slabs. Because the expansion sleeve has multiple vertical openings, the upper part of the expansion sleeve can slide along the inclined direction of the guide block to open the vertical openings and abut against the inner wall of the mounting hole. Since the fixing part is located outside the mounting hole and its end face abuts against the top of the roof slab, and the equipment is connected to the bottom end of the screw, the fixing part provides tensile and load-bearing capacity for the expansion bolt. This ensures that the expansion bolt is firmly installed when connected to the equipment, preventing it from falling off during use and transportation, thus improving safety. Because it is less likely to fall off during transportation, it can be installed at the factory, avoiding overlap with decoration work and saving time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure when the expansion sleeve in the expansion bolt used for the roof of a modular integrated building has not moved upwards;

[0022] Figure 2 This is a schematic diagram of the structure when the expansion sleeve in the expansion bolt used for the roof of a modular integrated building moves upward;

[0023] Figure 3 An exploded view of expansion bolts used in the roof slabs of modular integrated buildings.

[0024] [Explanation of Labels in the Attached Image]

[0025] 1: Screw;

[0026] 2: Fastener; 21: Hook; 22: Connector;

[0027] 3: Guide block;

[0028] 4: Expansion sleeve;

[0029] 5: Retaining components;

[0030] 6: Washer unit; 61: Flat washer; 62: Spring washer;

[0031] 7: Top plate. Detailed Implementation

[0032] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 As shown in the figure, the expansion bolt for the roof slab of a modular integrated building proposed in this embodiment of the invention can be inserted into the roof slab 7 of the modular integrated building. The roof slab 7 has mounting holes for the expansion bolt, and the bottom end of the expansion bolt is connected to the equipment. The expansion bolt includes a screw 1, a fixing member 2, a guide block 3, an expansion sleeve 4, a retaining member 5, and a washer unit 6. The fixing member 2, the guide block 3, and the screw 1 are connected in sequence. Figure 1 and Figure 3 As shown, in order to ensure that the expansion bolts can be firmly installed when connected to the equipment and will not fall off during use and transportation, thereby improving safety, the fastener 2 includes a connecting hook portion 21 and a connecting portion 22. The hook portion 21 is located outside the mounting hole and its end face abuts against the top of the top plate 7. The connecting portion 22 is located inside the mounting hole and is connected to the guide block 3, providing tensile force and load-bearing capacity for the expansion bolts.

[0034] like Figure 3 As shown, the guide block 3 has a frustum structure. The top end of the guide block 3 is connected to the connecting part 22 of the fixing part 2, and the bottom end of the guide block 3 is connected to the screw 1. In order to allow the expansion sleeve 4 to slide outward when it moves upward, the diameter of the top end of the guide block 3 is greater than the diameter of the bottom end of the guide block 3, which is greater than the diameter of the screw 1.

[0035] In this embodiment, the screw 1 has a diameter of 6mm, the top diameter of the guide block 3 has a diameter of 9mm, the bottom diameter of the guide block 3 has a diameter of 7mm, and the slope of the guide block 3 is 60°.

[0036] like Figure 3 As shown, screw 1 includes a smooth rod segment and a threaded rod segment connected together. Figure 1 and Figure 2 As shown, the expansion sleeve 4 is fitted onto the smooth section of the screw 1 and slidably connected to it. Multiple vertical openings are formed at the upper end of the expansion sleeve 4. The upper part of the expansion sleeve 4 can slide along the inclined direction of the guide block 3 to open the vertical openings and abut against the inner wall of the mounting hole. To avoid stress concentration in a specific part of the expansion sleeve 4 when it slides upwards, thus reducing the risk of breakage, multiple circular holes are formed on the expansion sleeve 4. These holes correspond one-to-one with the bottom ends of the vertical openings, ensuring the stability and reliability of the expansion bolt during long-term use. In this embodiment, both the number of circular holes and vertical openings are two, achieving optimal stability for the expansion bolt.

[0037] like Figure 1 and Figure 2 As shown, the retainer 5 is sleeved on the threaded section of the screw 1 and abuts against the bottom end of the expansion sleeve 4. The retainer 5 can push the expansion sleeve 4 to slide along the screw 1 and hold it in place. In this embodiment, the retainer 5 is a nut.

[0038] In order to evenly distribute the pressure applied to the retaining element 5, such as Figure 1 and Figure 3 As shown, washer unit 6 is sleeved on the threaded section of screw 1, and is located between expansion sleeve 4 and retainer 5. To increase the contact area and reduce friction between retainer 5 and expansion sleeve 4, washer unit 6 includes a flat washer 61, the top of which abuts against the bottom of expansion sleeve 4. To prevent retainer 5 from loosening, washer unit 6 also includes a spring washer 62, the top of which abuts against the bottom of flat washer 61, and the bottom of spring washer 62 abuts against the top of retainer 5. Tightening retainer 5 can maintain continuous pressure, thereby resisting loosening caused by vibration.

[0039] To enhance the fixing effect of the expansion bolts, the diameter of the mounting hole is larger than the diameter of the top of the guide block 3 and smaller than the diameter of the flat washer 61.

[0040] In this embodiment, the diameter of the mounting hole is 10mm, the diameter of the flat washer is 12mm, the thread nominal size of the expansion bolt is M6, the length of the expansion bolt is 90mm, the length of the fastener 2 is 40mm, the length of the screw 1 is 56mm, the length of the expansion sleeve 4 is 40mm, the length of the vertical opening is 15mm, the diameter of the expansion sleeve 4 is 6.4mm, and the maximum diameter of the expansion sleeve 4 after upward movement is 15mm. The expansion bolt is made of stainless steel.

[0041] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An expansion bolt for modular integrated building roof slabs, characterized in that, The expansion bolts can be inserted into the top plate (7) of the modular integrated building, and the top plate (7) is provided with mounting holes that mate with the expansion bolts; The expansion bolt includes a screw (1), a fixing member (2), a guide block (3), an expansion sleeve (4), and a retainer (5). The fixing member (2), the guide block (3), and the screw (1) are connected in sequence. The fixing member (2) is located outside the mounting hole and its end face abuts against the top of the top plate (7). The bottom end of the screw (1) extends out of the mounting hole. The expansion sleeve (4) is sleeved on the screw (1) and slidably connected to the screw (1). The upper end of the expansion sleeve (4) has multiple vertical openings. The upper part of the expansion sleeve (4) can slide along the inclined direction of the guide block (3) to open the vertical openings of the expansion sleeve (4) and abut against the inner wall of the mounting hole. The retainer (5) is sleeved on the screw (1) and abuts against the bottom end of the expansion sleeve (4). The retainer (5) can push the expansion sleeve (4) to slide along the screw (1) and retain it.

2. The expansion bolt for modular integrated building roof slabs as described in claim 1, characterized in that: The fastener (2) includes a connecting hook portion (21) and a connecting portion (22); The hook portion (21) is located outside the mounting hole and its end face abuts against the top of the top plate (7). The connecting portion (22) is located inside the mounting hole and is connected to the guide block (3).

3. The expansion bolt for modular integrated building roof slabs as described in claim 1, characterized in that: The guide block (3) has a frustum structure. The top end of the guide block (3) is connected to the connecting part (22) of the fixing member (2), and the bottom end of the guide block (3) is connected to the screw (1). The top diameter of the guide block (3) is greater than the bottom diameter of the guide block (3) and the diameter of the screw (1).

4. The expansion bolt for modular integrated building roof slabs as described in claim 1, characterized in that: The retainer (5) is a nut; The screw (1) includes a smooth rod segment and a threaded rod segment connected together; The expansion sleeve (4) is fitted onto the smooth rod segment of the screw (1) and is slidably connected to the smooth rod segment, and the nut is threadedly connected to the threaded rod segment.

5. The expansion bolt for modular integrated building roof slabs as described in claim 1, characterized in that: The expansion sleeve (4) has multiple round holes, and each round hole is connected to the bottom end of the vertical opening.

6. The expansion bolt for modular integrated building roof slabs as described in claim 5, characterized in that: The number of the circular holes and the number of the vertical openings are both two.

7. The expansion bolt for modular integrated building roof slabs as described in claim 4, characterized in that: It also includes a washer unit (6); The washer unit (6) is sleeved on the threaded section of the screw (1), and the washer unit (6) is located between the expansion sleeve (4) and the retainer (5).

8. The expansion bolt for modular integrated building roof slabs as described in claim 7, characterized in that: The washer unit (6) includes a flat washer (61) and a spring washer (62). The top end of the flat washer (61) abuts against the bottom end of the expansion sleeve (4), and the top end of the spring washer (62) abuts against the bottom end of the flat washer (61).

9. The expansion bolt for modular integrated building roof slabs as described in claim 8, characterized in that: The diameter of the mounting hole is greater than the diameter of the top of the guide block (3) and smaller than the diameter of the flat washer (61).

10. The expansion bolt for modular integrated building roof slabs as described in any one of claims 1-9, characterized in that: The expansion bolts are made of stainless steel.

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