Combined type outer wall anchor bolt structure

Abstract

The utility model relates to a combined type outer wall anchor bolt structure which comprises a top plate, vertical plates and a bottom plate, the vertical plates are symmetrically and fixedly arranged between the top plate and the bottom plate, the top plate and the bottom plate are located on the same axis, and a rotating shaft is arranged between the vertical plates on the two sides. The two ends of the rotating shaft are rotationally connected with the bottom face of the top plate and the top face of the bottom plate correspondingly. Arc-shaped extending pieces are symmetrically and fixedly arranged on the two sides of the top face of the bottom plate, the vertical plate is arranged between the extending pieces on the two sides, an upper driving part is arranged on the rotating shaft, and the rotating shaft can drive the upper driving part to move along the axis of the rotating shaft and drive the extending pieces on the two sides to extend outwards with the connecting positions of the extending pieces and the bottom plate as rotating points. According to the anchor bolt, the arc-shaped extending pieces are driven by the rotating shaft to extend outwards to form a limiting extrusion structure, the extending pieces are tightly meshed with the hole wall of the wall body, drawing force and shearing force are resisted through cooperation of friction force and mechanical resistance, and the slippage risk of a traditional anchor bolt is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of anchor bolt, especially a combined outer wall anchor bolt structure. BACKGROUND

[0002] With the rapid development of building industrialization and assembly technology, the combined outer wall system has become the mainstream choice of modern building envelope structure because of its lightweight, integration, efficient construction and other advantages. Anchor bolt is the core component connecting prefabricated outer wall panel and main structure, which plays a fixing role on the insulation board.

[0003] The existing anchor bolt is mostly designed based on single material (such as concrete or masonry), which is difficult to adapt to the complex load transmission requirements of the multi-layer composite structure of the combined outer wall (such as outer panel + insulation layer + light steel keel + inner panel). For example:

[0004] Slippage risk: mechanical expansion anchor bolt (such as MP type) relies on friction load, and the friction force after expansion in light insulation layer is insufficient, resulting in slippage between anchor bolt and insulation layer

[0005] Pull-out hazard: chemical anchor bolt relies on the bonding force of adhesive and concrete base material, but in composite wall, the interfacial bonding strength of adhesive and light steel keel or insulation material is insufficient, which is easy to cause delamination and fall off due to temperature and humidity changes. SUMMARY

[0006] Therefore, the utility model aims at providing a combined outer wall anchor bolt structure to solve the problems in the prior art.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0008] The utility model provides a combined outer wall anchor bolt structure, which comprises a top plate, a vertical plate and a bottom plate, the vertical plate is symmetrically fixed between the top plate and the bottom plate, the top plate and the bottom plate are on the same axis, a rotating shaft is arranged between the two vertical plates, and the two ends of the rotating shaft are rotatably connected with the bottom surface of the top plate and the top surface of the bottom plate respectively;

[0009] The bottom surface of the bottom plate is symmetrically provided with an arc-shaped extension piece on both sides, the vertical plate is between the two extension pieces, an upper driving part is arranged on the rotating shaft, the rotating shaft can drive the upper driving part to move along the axis of the rotating shaft, and the two extension pieces are driven to extend outward with the connecting part of the bottom plate as the rotating point;

[0010] The driving part comprises an upper moving block and an upper extension plate, the upper moving block is arranged on the rotating shaft, and the upper extension plate is fixedly and symmetrically inclinedly arranged on both sides of the upper moving block and abuts against the top of the extension piece.

[0011] Further, the end of the upper extension plate is fixedly connected with the outer circumference of the upper moving block, and the other end extends upward away from the rotating shaft and is arranged obliquely.

[0012] Further, the lower position of the rotating shaft is also provided with a limiting part, and the limiting part comprises a lower moving block, a lower extension plate and a blocking column.

[0013] The lower moving block is arranged on the rotating shaft, the lower extension plate is arranged symmetrically and obliquely on the top surface of the lower moving block and is located on both sides of the rotating shaft, the top end of the lower extension plate extends upward away from the rotating shaft and is arranged obliquely, the blocking column is arranged symmetrically and fixedly on both sides of the vertical plate, and the blocking column abuts against the inner side of the lower extension plate.

[0014] The rotating shaft can drive the lower moving block to move on the axis of the rotating shaft, and the blocking column can limit the end of the lower extension plate to extend outward through the extension hole arranged on the extension piece.

[0015] Further, the rotating shaft comprises a top shaft, an upper thread and a lower thread which are fixedly connected in sequence, the top shaft is rotationally connected with the top plate, the bottom end of the lower thread is screw-connected with the bottom plate, the upper moving block is screw-connected with the upper thread, the side wall of the upper moving block is slidingly connected with the vertical plate, and the lower moving block is screw-connected with the lower thread, and the side wall of the lower moving block is slidingly connected with the vertical plate.

[0016] The rotation directions of the threads of the upper thread and the lower thread are opposite.

[0017] Further, the top shaft penetrates out of the top plate and is fixedly provided with a nut.

[0018] Further, a plurality of arc-shaped friction strips are arranged at intervals on the outer side of the extension piece.

[0019] Further, a plurality of spherical protrusions are arranged at intervals on the outer side wall of the friction strip.

[0020] Further, the extension piece and the lower extension piece have ductility.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] In the utility model, the arc-shaped extension piece is driven to extend outward by the rotating shaft, a limiting extrusion structure is formed, the extension piece is tightly engaged with the hole wall of the wall body, the pulling force and the shearing force are resisted by the friction force and the mechanical resistance force, and the slippage risk of the traditional anchor bolt is avoided. The arc-shaped design of the extension piece generates elastic deformation outward when being pressed, the contact area and the pressing force with the hole wall are further increased, the dynamic distribution of the load is realized, and the interface peeling risk caused by local stress concentration is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] The drawings constituting a part of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their description serve to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0025] Figure 2 It is a schematic diagram of the vertical plate structure of the present application;

[0026] Figure 3 It is a schematic diagram of the rotating shaft and the limiting part structure of the present application;

[0027] Figure 4 It is a schematic diagram of the friction strip and the protrusion structure of the present application.

[0028] Legend of reference signs:

[0029] 1, top plate; 2, rotating shaft; 201, top shaft; 202, upper thread; 203, lower thread; 3, upper moving block; 301, upper extension plate; 4, lower moving block; 401, lower extension plate; 5, extension piece; 501, friction strip; 502, protrusion; 503, extension hole; 6, bottom plate; 7, vertical plate; 701, blocking column; 8, nut. DETAILED DESCRIPTION

[0030] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0032] In addition, in the description of the present application, unless otherwise explicitly limited, the terms "mounting", "connecting", "connection", "connecting member" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood in combination with the specific circumstances.

[0033] The specific embodiments of the present application will be described below with reference to the drawings.Figures 1 to 4 The utility model discloses in combination with the embodiment in detail.

[0034] Overall, the utility model discloses a combined outer wall anchor bolt structure for fixing the heat preservation layer of combined outer wall. It includes roof 1, vertical board 7 and bottom plate 6, vertical board 7 is fixedly arranged between roof 1 and bottom plate 6 symmetrically, roof 1 and bottom plate 6 are on the same axis, and rotating shaft 2 is arranged between two side vertical boards 7, and the two ends of rotating shaft 2 are rotatably connected with the bottom surface of roof 1 and the top surface of bottom plate 6 respectively. Wherein, arc-shaped extension piece 5 is fixedly arranged on the top surface of bottom plate 6 symmetrically on both sides, vertical board 7 is between two side extension pieces 5, and upper driving part is arranged on rotating shaft 2, rotating shaft 2 can drive upper driving part to move along the axis of rotating shaft 2, and drives two side extension pieces 5 to extend outward with the connecting part of bottom plate 6 as the rotating point. Driving part includes upper moving block 3 and upper extension plate 301, upper moving block 3 is arranged on rotating shaft 2, and upper extension plate 301 is fixedly and symmetrically arranged on the both sides of upper moving block 3 and abuts against the top of extension piece 5.

[0035] In the utility model, arc-shaped extension piece 5 is driven to extend outward by rotating shaft 2, forms the limit extrusion structure, extension piece 5 is tightly engaged with the hole wall of wall, utilizes the friction and mechanical resistance to resist the pulling force and shearing force cooperatively, avoids the slippage risk of traditional anchor bolt. The arc-shaped design of extension piece 5 produces the elastic deformation outward when being pressed, further increases the contact area and the pressure of hole wall, realizes the dynamic distribution of load, reduces the interface peeling risk caused by local stress concentration.

[0036] Further, the rotating connection of rotating shaft 2 with roof 1 and bottom plate 6 allows the anchor bolt to deflect slightly under seismic load, releases the seismic energy, and avoids the brittle fracture caused by rigid connection.

[0037] In specific implementation, the anchor bolt is inserted into the embedded hole of prefabricated wallboard and main structure in the shrinkage state (extension piece 5 is retracted). Through the external force input of rotating shaft 2, upper moving block 3 is driven to move downward along the axis of rotating shaft 2. When upper moving block 3 moves downward, upper extension plate 301 arranged obliquely on both sides pushes the top of extension piece 5 outward. Since extension piece 5 has ductility, arc-shaped extension piece 5 is forced to extend outward with the connecting part of bottom plate 6 as the fulcrum. The convex arc surface of extension piece 5 is in close contact with the hole wall of wall, forming multi-point engagement, and meanwhile, the root of extension piece 5 and the fixed end of bottom plate 6 generate reverse bending moment, enhancing the pull-out resistance. When subjected to pulling force, the arc-shaped structure of extension piece 5 further expands outward under the pressure of hole wall, increasing the friction contact area, and realizing the self-locking effect of "the tighter the pull, the tighter the lock".

[0038] It should be understood that the end of upper extension plate 301 is fixedly connected with the outer circumference of upper moving block 3, and the other end extends upward away from rotating shaft 2 and is arranged obliquely.

[0039] Based on the above setting, asFigure 2 and Figure 3 As shown, a limiting part is also provided at the lower position of the rotating shaft 2. The limiting part includes a lower moving block 4, a lower extension plate 401, and a blocking post 701. The lower moving block 4 is provided on the rotating shaft 2. The lower extension plate 401 is symmetrically and inclinedly arranged on the top surface of the lower moving block 4 and located on both sides of the rotating shaft 2. The top end of the lower extension plate 401 extends upward and is inclined away from the rotating shaft 2. The blocking post 701 is symmetrically and fixedly arranged on both sides of the vertical plate 7. The blocking post 701 abuts against the inner side of the lower extension plate 401. The rotating shaft 2 can drive the lower moving block 4 to move on the axis of the rotating shaft 2. The blocking post 701 can restrict the end of the lower extension plate 401 from extending outward through the extension hole 503 opened on the extension plate 5.

[0040] In this embodiment, the lower moving block 4 is driven to move upward by the rotating shaft 2. The lower extension plates 401 on both sides extend to both sides through the blocking ends of the blocking column 701, and extend through the extension hole 503 to abut against the wall, forming a bottom locking key engagement with the hole wall. Working together with the extension piece 5, the entire anchor bolt structure is fixed in the pre-made hole, further increasing the overall stability.

[0041] In practice, the anchor bolt is inserted into the pre-embedded hole, and the rotating shaft 2 drives the lower moving block 4 to move upward along the axis. The top of the lower extension plate 401 is rigidly abutted by the blocking column 701. Due to the extensibility of the lower extension plate 401, the middle part of the lower extension plate 401 is forced to bend outward elastically, and protrude outward elastically through the pre-made protrusion hole 503, forming a tight engagement with the hole wall.

[0042] Among them, such as Figure 2 As shown, the rotating shaft 2 includes a top shaft 201, an upper thread 202, and a lower thread 203 that are fixedly connected in sequence. The top shaft 201 is rotatably connected to the top plate 1. The bottom end of the lower thread 203 is screwed to the bottom plate 6. The upper moving block 3 is screwed to the upper thread 202, and its side wall is slidably connected to the vertical plate 7. The lower moving block 4 is screwed to the lower thread 203, and its side wall is slidably connected to the vertical plate 7. The threads of the upper thread 202 and the lower thread 203 rotate in opposite directions.

[0043] like Figure 3 As shown, in this embodiment, the upper thread 202 and the lower thread 203 rotate in opposite directions. When the rotating shaft 2 rotates, the upper moving block 3 and the lower moving block 4 move synchronously in opposite directions, driving the extension piece 5 and the lower extension plate 401 to extend simultaneously, forming a double limit and improving the uniformity of the pull-out force.

[0044] In addition, since the bottom end of the lower thread 203 is screwed to the base plate 6, when the rotating shaft 2 rotates, the lower thread 203 passes through the bottom of the base plate 6, so that the rotating shaft 2 and the base plate 6 form a self-locking mechanism to resist the thread retraction caused by vibration and prevent the bolt structure from coming off the pre-embedded hole.

[0045] It should be noted that the reverse rotation of the rotating shaft 2 drives the upper moving block 3 to move upward, the pushing force of the upper extension plate 301 on the extension piece 5 is released, the lower moving block 4 moves downward, the lower extension plate 401 is inwards contracted by the extension force, and the anchor bolt can be taken out from the hole without damage, which supports repeated use.

[0046] In addition, as a preferred structure of the embodiment, in order to increase the friction between the extension piece 5 and the sidewall of the embedded hole, a plurality of arc-shaped friction strips 501 are arranged on the outer side of the extension piece 5, and a plurality of spherical protrusions 502 are arranged on the outer sidewall of the friction strip 501.

[0047] As shown in Figure 4 It should be noted that the arc-shaped friction strip 501 is in surface contact with the hole wall, and the spherical protrusion 502 is embedded in the hole wall to form point contact to increase the friction and further increase the pull-out force. In addition, the arc-shaped design of the friction strip 501 uniformly distributes the contact pressure, and the spherical protrusion 502 disperses the stress by locally embedding, avoiding the crushing of the hole wall or the fatigue fracture of the material.

[0048] As shown in Figure 4 In order to facilitate the operator to rotate the rotating shaft 2, in the embodiment, the top shaft 201 penetrates out to the outside of the top plate 1 and is fixedly provided with a nut 8.

[0049] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A combined external wall anchor structure, characterized in that: It includes a top plate (1), a vertical plate (7), and a bottom plate (6). The vertical plate (7) is symmetrically fixed between the top plate (1) and the bottom plate (6). The top plate (1) and the bottom plate (6) are on the same axis. A rotating shaft (2) is provided between the two vertical plates (7). The two ends of the rotating shaft (2) are rotatably connected to the bottom surface of the top plate (1) and the top surface of the bottom plate (6), respectively. The bottom plate (6) has symmetrical arc-shaped extension pieces (5) fixed on both sides of its top surface. The vertical plate (7) is located between the two extension pieces (5). The rotating shaft (2) is provided with an upper driving part. The rotating shaft (2) can drive the upper driving part to move along the axis of the rotating shaft (2) and drive the two extension pieces (5) to extend outward with the connection point with the bottom plate (6) as the rotation point. The drive unit includes an upper moving block (3) and an upper extension plate (301). The upper moving block (3) is disposed on the rotating shaft (2). The upper extension plate (301) is fixedly and symmetrically inclined on both sides of the upper moving block (3) and abuts against the top of the extension piece (5).

2. The combined external wall anchor structure according to claim 1, characterized in that: The end of the upper extension plate (301) is fixedly connected to the outer circumference of the upper moving block (3), and the other end extends upward and is inclined away from the rotating shaft (2).

3. The combined external wall anchor structure according to claim 1, characterized in that: The rotating shaft (2) is also provided with a limiting part at a lower position. The limiting part includes a lower moving block (4), a lower extension plate (401), and a blocking post (701). The lower moving block (4) is disposed on the rotating shaft (2). The lower extension plate (401) is symmetrically and inclinedly disposed on the top surface of the lower moving block (4) and located on both sides of the rotating shaft (2). The top end of the lower extension plate (401) extends upward away from the rotating shaft (2) and is inclinedly disposed. The blocking column (701) is symmetrically and fixedly disposed on both sides of the vertical plate (7). The blocking column (701) abuts against the inner side of the lower extension plate (401). The rotating shaft (2) can drive the lower moving block (4) to move on the axis of the rotating shaft (2), and the blocking post (701) can restrict the end of the lower extension plate (401) from extending outward through the protrusion hole (503) opened on the extension piece (5).

4. A combined external wall anchor structure according to claim 3, characterized in that: The rotating shaft (2) includes a top shaft (201), an upper thread (202), and a lower thread (203) that are fixedly connected in sequence. The top shaft (201) is rotatably connected to the top plate (1). The bottom end of the lower thread (203) is screwed to the bottom plate (6). The upper moving block (3) is screwed to the upper thread (202), and its sidewall is slidably connected to the vertical plate (7). The lower moving block (4) is screwed to the lower thread (203), and its sidewall is slidably connected to the vertical plate (7). The upper thread (202) and the lower thread (203) rotate in opposite directions.

5. A combined external wall anchor structure according to claim 4, characterized in that: The top shaft (201) extends to the outside of the top plate (1) and is fixed with a nut (8).

6. A combined external wall anchor structure according to claim 1, characterized in that: The outer side of the extension piece (5) is provided with a plurality of arc-shaped friction strips (501) at intervals.

7. A combined external wall anchor structure according to claim 6, characterized in that: The outer side wall of the friction strip (501) is provided with a plurality of spherical protrusions (502) spaced apart.

8. A combined external wall anchor structure according to claim 3, characterized in that: The extension sheet (5) and the lower extension sheet are stretchable.

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