Drill bit special for planting steel bars through post-injection of steel bar planting glue

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a special drill bit for planting steel bars through post-injection of steel bar planting glue, which comprises a drill bit main body, a spiral blade and a chip groove which are processed on the side surface of the working end of the drill bit main body, and an extension rod which is fixed at one end of the drill bit main body far away from a conical part, a second connecting groove allowing the first connecting block to be embedded is formed in one end of the extension rod, a second connecting block is fixed to the other end of the extension rod, and a third threaded counter bore communicated with the second connecting groove is formed in the extension rod; a first locking groove is formed in the first connecting block; a second locking groove is formed in the second connecting block; according to the utility model, the drill bit main body is provided with the spiral cutting edge, a rough surface can be formed in a hole after a drilled hole is formed, the anchoring drawing strength is improved, the overall length of the drill bit main body can be adjusted when necessary through the arranged extension rod, the requirements of construction scenes with too long distance or insufficient space are met, the construction quality is ensured, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology and is used for the construction of steel cage engineering for secondary structural columns of buildings. Specifically, it relates to a special drill bit for post-injection of rebar adhesive for rebar installation. Background Technology

[0002] Rebar anchoring is a post-anchoring connection technology for reinforcing steel bars in seismic reinforcement projects. It utilizes the locking and gripping force of structural adhesive and is the best choice for structural reinforcement and heavy load fastening applications. Rebar anchoring involves drilling holes in concrete, wall, rock, or other substrates, injecting high-strength anchoring adhesive, and then inserting steel bars or profiles. After the adhesive cures, the steel bars and substrate are bonded together. It is a commonly used building engineering technology in the reinforcement and strengthening industry.

[0003] During construction, special drilling tools are first used to drill holes in the building, the structural column steel bars are inserted into the holes, and after the structural columns are tied, the adhesive is injected using an injection gun.

[0004] While existing drill bits can meet general construction needs, their length is limited. In scenarios where the distance is too far or the space is insufficient, it is difficult to ensure construction quality and affect the construction progress.

[0005] To solve the above problems, this utility model proposes a special drill bit for post-injection rebar adhesive rebar installation. Utility Model Content

[0006] To address the aforementioned problems in the existing technology, this utility model provides a special drill bit for post-injection rebar anchoring, which features convenient use, high stability, and wide applicability.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a special drill bit for post-injection rebar anchoring, comprising a drill bit body, the working end face of the drill bit body having a tapered portion, and a spiral cutting edge and a chip removal groove machined on the working end side of the drill bit body, a connecting block fixed at the end of the drill bit body away from the tapered portion, and further comprising:

[0008] An extension rod has a second connecting groove machined at one end for the first connecting block to be inserted into, and a second connecting block fixed at the other end. A third threaded countersunk hole communicating with the second connecting groove is machined on the extension rod.

[0009] The first countersunk screw has a locking groove machined on the first connecting block. The first countersunk screw is screwed into the third threaded countersunk hole by thread engagement, and the end of the first countersunk screw is embedded in the first locking groove.

[0010] As a preferred embodiment of this utility model, the first connecting block is a square block, the second connecting groove is a square groove, and the outer wall of the first connecting block abuts against the inner wall of the second connecting groove.

[0011] As a preferred technical solution of this utility model, it also includes:

[0012] Universal joints, two of which are symmetrically distributed;

[0013] A connecting rod, with two universal joints symmetrically fixed to both ends of the connecting rod;

[0014] A connector is fixed to the universal joint, and the extension rod is fixedly connected to the connector.

[0015] A mounting base is used to fix the universal joint to a fixed object. The universal joint passes through the mounting base and is rotatably connected to the mounting base by a bearing.

[0016] As a preferred technical solution of this utility model, it also includes:

[0017] The No. 2 countersunk screw has a No. 1 connecting groove machined in the connector head for the No. 2 connecting block to be embedded in, and a No. 2 threaded countersunk hole machined in the connector head that communicates with the No. 1 connecting groove. A No. 2 locking groove is machined on the No. 2 connecting block. The No. 2 countersunk screw is screwed into the No. 2 threaded countersunk hole by thread engagement, and the end of the No. 2 countersunk screw is embedded in the No. 2 locking groove.

[0018] As a preferred embodiment of this utility model, the second connecting block is a square block, the first connecting groove is a square groove, and the outer wall of the second connecting block abuts against the inner wall of the first connecting groove.

[0019] In a preferred embodiment of this utility model, the dimensions of the first connecting block, the second connecting groove, the second connecting block, and the first connecting groove are all equal.

[0020] As a preferred embodiment of this utility model, the connecting rod includes:

[0021] The inner connecting rod has multiple positioning grooves that are equally spaced along its length on its outer wall.

[0022] An outer connecting rod has a connecting cavity machined inside it, and an inner connecting rod is embedded in the connecting cavity to form a telescopic structure. A first-order threaded countersunk hole is machined on the outer connecting rod.

[0023] The No. 3 countersunk screw is screwed into the No. 1 threaded countersunk hole by means of thread engagement, and the end of the No. 3 countersunk screw is embedded in the positioning groove.

[0024] As a preferred embodiment of this utility model, both the inner connecting rod and the connecting cavity are square structures, and the outer wall of the inner connecting rod abuts against the inner wall of the connecting cavity.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] In this invention, the drill bit body has a spiral cutting edge, which forms a rough surface inside the hole after drilling, improving the anchor pull-out strength. Furthermore, the extension rod can be used to adjust the overall length of the drill bit body when necessary, meeting the needs of construction scenarios with excessive distance or insufficient space, ensuring construction quality, and improving construction efficiency.

[0027] Other additional advantages and beneficial effects of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the diagram;

[0031] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 4 This utility model Figure 3 Enlarged structural diagram at point B in the diagram;

[0033] Figure 5 This utility model Figure 3 A magnified structural diagram at point C in the diagram.

[0034] In the diagram: 1. Drill bit body; 101. Taper; 102. Spiral cutting edge; 103. Chip removal groove; 104. Connecting block No. 1; 1041. Locking groove No. 1; 2. Universal joint; 3. Connecting rod; 301. Inner connecting rod; 3011. Positioning groove; 302. Outer connecting rod; 3021. Connecting cavity; 3022. Countersunk hole No. 1; 4. Connector; 401. Connecting groove No. 1; 402. Countersunk hole No. 2; 5. Extension rod; 501. Connecting groove No. 2; 502. Connecting block No. 2; 5021. Locking groove No. 2; 503. Countersunk hole No. 3; 6. Fixing seat; 7. Countersunk screw No. 1; 8. Countersunk screw No. 2; 9. Countersunk screw No. 3. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Please see Figures 1-5 The present invention provides the following technical solution: a special drill bit for post-injection rebar adhesive rebar installation, including a drill bit body 1, the working end face of the drill bit body 1 having a cone portion 101, and a spiral cutting edge 102 and a chip removal groove 103 processed on the working end side of the drill bit body 1, a connecting block 104 fixed at the end of the drill bit body 1 away from the cone portion 101, and also including: an extension rod 5 and a countersunk screw 7.

[0037] Furthermore, by Figures 1-4As shown, in this embodiment, a second connecting groove 501 for the first connecting block 104 to be embedded is machined at one end of the extension rod 5, and a second connecting block 502 is fixed at the other end. A third threaded countersunk hole 503 communicating with the second connecting groove 501 is machined on the extension rod 5. A first locking groove 1041 is machined on the first connecting block 104. The first countersunk screw 7 is screwed into the third threaded countersunk hole 503 by thread engagement, and the end of the first countersunk screw 7 is embedded in the first locking groove 1041. With the above solution, when in use, the drill bit body 1 can be directly fixed to the output shaft of the power device, for example, fixed to the power output end of the electric drill, so that the drill bit... The main body 1 is drilled perpendicular to the building surface. Because the drill bit body 1 has a spiral cutting edge 102, a rough surface will be formed in the hole after drilling, which improves the anchor pull-out strength. When necessary, for construction scenarios where the distance is too far or the space is insufficient, several extension rods 5 can be connected together, and the corresponding No. 2 connecting block 502 can be embedded into the No. 2 connecting groove 501. The No. 1 countersunk screw 7 is tightened to lock it. Finally, the No. 1 connecting block 104 is embedded into the No. 2 connecting groove 501 and the No. 1 countersunk screw 7 is tightened to lock it. This adjusts the overall length of the drill bit body 1 to meet the construction scenarios where the distance is too far or the space is insufficient, ensuring construction quality and improving construction efficiency.

[0038] Preferably, by Figures 1-4 As shown in this embodiment, the first connecting block 104 is a square block, the second connecting groove 501 is a square groove, and the outer wall of the first connecting block 104 abuts against the inner wall of the second connecting groove 501. After adopting the above scheme, the stability of the connection of several extension rods 5 and the connection of extension rods 5 with drill bit body 1 is higher during use, avoiding the problem of relative slippage.

[0039] Preferably, by Figure 1 As shown, this embodiment also includes: a universal joint 2, a connecting rod 3, a connector 4, and a fixing seat 6. The two universal joints 2 are symmetrically distributed and fixed to the two ends of the connecting rod 3. The connector 4 is fixed to the universal joint 2. The extension rod 5 is fixedly connected to the connector 4. The fixing seat 6 is used to fix the universal joint 2 to a fixed object. The universal joint 2 passes through the fixing seat 6 and is rotatably connected to the fixing seat 6 by bearings. With the above solution, in some construction scenarios where space is insufficient and operation is inconvenient, the two universal joints 2 can be fixed to the support object by the fixing seat 6 first, and then the drill body 1 can be fixed to the connector 4, or fixed to the connector 4 by the extension rod 5. The other end of the universal joint 2 is connected to the output shaft of the power device. The universal joint 2 can be used to change the power output direction. The power output direction is not coaxial with the drill body 1, but it can still drive the drill body 1 to rotate.

[0040] Optionally, by Figure 1 and Figure 3As shown, this embodiment also includes: a second countersunk screw 8, a first connecting groove 401 for the second connecting block 502 to be embedded in the connector head 4, and a second threaded countersunk hole 402 communicating with the first connecting groove 401 on the connector head 4, and a second locking groove 5021 on the second connecting block 502. The second countersunk screw 8 is screwed into the second threaded countersunk hole 402 by thread engagement, and the end of the second countersunk screw 8 is embedded in the second locking groove 5021. With the above scheme, when in use, the first connecting block 104 or the second connecting block 502 is embedded in the first connecting groove 401, and then the second countersunk screw 8 is tightened to lock it, so that the drill bit body 1 or the extension rod 5 can be connected to the universal joint 2, which is convenient and stable.

[0041] Preferably, by Figure 1 and Figure 3 As shown in this embodiment, the second connecting block 502 is a square block, the first connecting groove 401 is a square groove, and the outer wall of the second connecting block 502 abuts against the inner wall of the first connecting groove 401. After adopting the above scheme, the stability of the drill bit body 1 or the extension rod 5 after connecting with the universal joint 2 can be improved during use, avoiding the problem of relative slippage.

[0042] Preferably, by Figure 1 and Figure 3 As shown in this embodiment, the dimensions of the first connecting block 104, the second connecting groove 501, the second connecting block 502, and the first connecting groove 401 are all equal. After adopting the above scheme, when in use, the drill bit body 1 can be directly connected to the power device, or the drill bit body 1 can be connected to the extension rod 5 and then the extension rod 5 can be connected to the power device, or the drill bit body 1 can be connected to the universal joint 2, or the drill bit body 1 can be connected to the extension rod 5 and then the extension rod 5 can be connected to the universal joint 2.

[0043] Preferably, by Figure 1 , Figure 3 and Figure 5As shown in this embodiment, the connecting rod 3 includes an inner connecting rod 301, an outer connecting rod 302, and a No. 3 countersunk screw 9. Multiple positioning grooves 3011, evenly spaced along the length of the inner connecting rod 301, are machined on its outer wall. A connecting cavity 3021 is machined inside the outer connecting rod 302. The inner connecting rod 301 is embedded in the connecting cavity 3021 to form a telescopic structure. A No. 1 threaded countersunk hole 3022 is machined on the outer connecting rod 302. The No. 3 countersunk screw 9 is screwed into the No. 1 threaded countersunk hole 3022 by thread engagement, and the end of the No. 3 countersunk screw 9 is embedded in the positioning groove 3011. With this solution, during use, the No. 3 countersunk screw 9 can be loosened, and then the embedding depth of the inner connecting rod 301 can be adjusted to adjust the overall length of the connecting rod 3 to meet different construction scenarios. After adjustment, the No. 3 countersunk screw 9 is tightened to lock it into the positioning groove 3011 at different positions, ensuring stability after adjustment.

[0044] Preferably, by Figure 1 , Figure 3 and Figure 5 As shown in this embodiment, both the inner connecting rod 301 and the connecting cavity 3021 are square structures, and the outer wall of the inner connecting rod 301 abuts against the inner wall of the connecting cavity 3021. With the above solution, the stability of the inner connecting rod 301 and the outer connecting rod 302 after connection can be higher during use, avoiding the problem of relative slippage.

[0045] Components not described in detail in this article are existing technologies.

[0046] The working principle and usage process of this utility model: When using the drill bit body 1 of this utility model, the drill bit body 1 can be directly fixed on the output shaft of the power device, for example, fixed on the power output end of the electric drill, so that the drill bit body 1 is perpendicular to the surface of the building for drilling.

[0047] Because the drill bit body 1 has a spiral cutting edge 102, a rough surface will be formed in the hole after drilling, which improves the anchoring pull-out strength.

[0048] When necessary, for construction scenarios where the distance is too far or the space is insufficient, several extension rods 5 can be connected together, and the corresponding No. 2 connecting block 502 can be embedded into the No. 2 connecting groove 501. The No. 1 countersunk screw 7 can be tightened to lock it. Finally, the No. 1 connecting block 104 can be embedded into the No. 2 connecting groove 501 and the No. 1 countersunk screw 7 can be tightened to lock it. This adjusts the overall length of the drill bit body 1 to meet the needs of construction scenarios where the distance is too far or the space is insufficient, ensuring construction quality and improving construction efficiency.

[0049] In addition, for some construction scenarios where space is insufficient and operation is inconvenient, the two universal joints 2 can be fixed to the support using the fixing seat 6, and then the drill body 1 can be fixed to the connector 4, or fixed to the connector 4 through the extension rod 5. The other end of the universal joint 2 is connected to the output shaft of the power unit. Through the universal joint 2, the power output direction can be changed. Even if the power output direction is not coaxial with the drill body 1, the drill body 1 can still be driven to rotate.

[0050] When using the drill bit of this utility model, the No. 3 countersunk screw 9 can be loosened, and then the embedding depth of the inner connecting rod 301 can be adjusted to adjust the overall length of the connecting rod 3 to meet the needs of different construction scenarios. After the adjustment is completed, the No. 3 countersunk screw 9 is tightened so that the No. 3 countersunk screw 9 is embedded in the positioning groove 3011 at different positions for locking.

[0051] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A special drill bit for post-injection rebar anchoring, comprising a drill bit body (1), characterized in that: The working end face of the drill bit body (1) has a tapered portion (101), and a spiral cutting edge (102) and a chip removal groove (103) are machined on the working end side of the drill bit body (1). A connecting block (104) is fixed at one end of the drill bit body (1) away from the tapered portion (101), and the drill bit body (1) also includes: An extension rod (5) has a second connecting groove (501) machined at one end for the first connecting block (104) to be inserted, and a second connecting block (502) fixed at the other end. A third threaded countersunk hole (503) communicating with the second connecting groove (501) is machined on the extension rod (5). The first countersunk screw (7) has a locking groove (1041) machined on the first connecting block (104). The first countersunk screw (7) is screwed into the third threaded countersunk hole (503) by thread engagement, and the end of the first countersunk screw (7) is embedded in the first locking groove (1041).

2. The special drill bit for post-injection rebar anchoring according to claim 1, characterized in that: The first connecting block (104) is a square block, the second connecting groove (501) is a square groove, and the outer wall of the first connecting block (104) abuts against the inner wall of the second connecting groove (501).

3. The special drill bit for post-injection rebar anchoring according to claim 1, characterized in that: Also includes: Universal joint (2), the two universal joints (2) are symmetrically distributed; The connecting rod (3) has two universal joints (2) symmetrically fixed to both ends of the connecting rod (3); Connector (4), the connector (4) is fixed to the universal joint (2), and the extension rod (5) is fixedly connected to the connector (4); A fixed base (6) is used to fix the universal joint (2) to a fixed object. The universal joint (2) passes through the fixed base (6) and is rotatably connected to the fixed base (6) by means of a bearing.

4. The special drill bit for post-injection rebar anchoring according to claim 3, characterized in that: Also includes: The second countersunk screw (8) has a first connecting groove (401) machined in the connector (4) for the second connecting block (502) to be embedded in, and a second threaded countersunk hole (402) communicating with the first connecting groove (401) is machined on the connector (4). A second locking groove (5021) is machined on the second connecting block (502). The second countersunk screw (8) is screwed into the second threaded countersunk hole (402) by thread engagement, and the end of the second countersunk screw (8) is embedded in the second locking groove (5021).

5. The special drill bit for post-injection rebar anchoring according to claim 4, characterized in that: The second connecting block (502) is a square block, the first connecting groove (401) is a square groove, and the outer wall of the second connecting block (502) abuts against the inner wall of the first connecting groove (401).

6. The special drill bit for post-injection rebar anchoring according to claim 5, characterized in that: The dimensions of the first connecting block (104), the second connecting groove (501), the second connecting block (502), and the first connecting groove (401) are all equal.

7. The special drill bit for post-injection rebar anchoring according to claim 3, characterized in that: The connecting rod (3) includes: The inner connecting rod (301) has multiple positioning grooves (3011) that are equally spaced along its length on its outer wall; An outer connecting rod (302) has a connecting cavity (3021) machined inside it. An inner connecting rod (301) is embedded in the connecting cavity (3021) to form a telescopic structure. A first threaded countersunk hole (3022) is machined on the outer connecting rod (302). The No. 3 countersunk screw (9) is screwed into the No. 1 threaded countersunk hole (3022) by means of thread engagement, and the end of the No. 3 countersunk screw (9) is embedded in the positioning groove (3011).

8. The special drill bit for post-injection rebar anchoring according to claim 7, characterized in that: Both the inner connecting rod (301) and the connecting cavity (3021) are square structures, and the outer wall of the inner connecting rod (301) abuts against the inner wall of the connecting cavity (3021).

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