Variable-diameter expanding head anchor rod drilling machine

Abstract

This utility model discloses a variable diameter enlarged head anchor bolt drilling machine, relating to the field of drilling equipment technology. It includes a drilling machine connector connected to the drilling machine body, with an anchor bolt drill bit assembly fixedly connected to the end of the connector away from the drilling machine body. The anchor bolt drill bit assembly includes a connecting rod fixedly connected to the connector, and a control component for adjusting the borehole diameter is provided at the end of the connecting rod away from the connector. A hollow anchor bolt is fixedly mounted on the control component, and a fixed drill bit is fixedly mounted at the end of the hollow anchor bolt away from the control component. The fixed drill bit has a first chip removal guide groove, and an adjusting drill bit is slidably mounted on the outer side of the hollow anchor bolt, with a second chip removal guide groove that corresponds to and matches the first guide groove. This variable diameter enlarged head anchor bolt drilling machine expands the borehole diameter by dynamically adjusting the drill bit diameter while maintaining the alignment of the chip removal guide grooves, ensuring smooth chip removal and thus improving drilling quality.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, specifically a variable diameter enlarged head anchor bolt drilling machine. Background Technology

[0002] In the fields of geotechnical engineering and civil engineering, anchor bolts are an important support structure and are widely used in engineering scenarios such as slope stabilization, tunnel support, and foundation pit excavation.

[0003] Traditional anchor drilling machinery typically uses drill bits of fixed diameter for drilling operations, resulting in a constant hole diameter throughout the drilling process. However, in actual engineering projects, due to the complexity and heterogeneity of soil and rock properties, the load-bearing capacity requirements for anchors often differ at different depths and locations. For example, in some soft soil and rock layers, it is necessary to increase the anchor hole diameter to improve the friction and adhesion between the anchor and the soil and rock, thereby enhancing the anchor's load-bearing capacity; while in some hard soil and rock layers, a smaller hole diameter is sufficient to meet engineering requirements. An excessively large hole diameter not only increases construction costs but may also cause unnecessary disturbance to the surrounding soil and rock.

[0004] Therefore, in order to address the above problems, the applicant needs to design a variable diameter enlarged head anchor drilling machine to solve the problem. Utility Model Content

[0005] The purpose of this invention is to provide a variable diameter enlarged head anchor bolt drilling machine to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable diameter enlarged head anchor bolt drilling machine, comprising a drilling machine connector connected to the drilling machine body, and an anchor bolt drill bit assembly for drilling is fixedly connected to one end of the drilling machine connector away from the drilling machine body. The anchor bolt drilling machine assembly includes a connecting rod fixedly connected to the drilling machine connector, and a control component for adjusting the borehole diameter is provided at one end of the connecting rod away from the drilling machine connector. A hollow anchor bolt is fixedly provided on the control component, and a fixed drill bit is fixedly provided at one end of the hollow anchor bolt away from the control component. A chip removal guide groove is provided on the fixed drill bit, and an adjusting drill bit is slidably provided on the outer side of the hollow anchor bolt. A second chip removal guide groove that matches the first guide groove is provided on the adjusting drill bit.

[0007] Furthermore, the control mechanism includes a cylinder connected to the connecting rod, and the output end of the cylinder is provided with a telescopic rod. The hollow anchor rod is provided with a groove, and the hollow anchor rod is provided with two limiting members. The two limiting members cooperate with the groove to adjust the position of the drill bit.

[0008] Through the above structural design, the cylinder drives the telescopic rod to control the engagement between the limiting component and the groove, thereby achieving precise mechanical control of the drill bit position.

[0009] Furthermore, the one of the two limiting members closer to the fixed drill bit is the limiting member one, and the one farther away from the fixed drill bit is the limiting member two. The limiting member one is used to press the adjusting drill bit against the fixed drill bit, and the limiting member two is used to prevent the remaining adjusting drill bit from moving away from the fixed drill bit.

[0010] Through the above structural design, the first limiting component ensures that the adjusting drill bit and the fixed drill bit fit tightly together to form the maximum enlarged hole diameter; the second limiting component prevents the remaining adjusting drill bit from moving away from the fixed drill bit, ensuring the reliability of hole diameter changes.

[0011] Furthermore, the distance between the first limiting member and the second limiting member is greater than the depth of the hole to be drilled.

[0012] The above structural design ensures that the adjustable drill bit is always under control throughout the entire drilling stroke, and the second limiting component can effectively block the adjustable drill bit.

[0013] Furthermore, a support rod is fixedly installed on the cylinder, and a fixing plate is fixedly installed at the end of the support rod away from the cylinder, and the fixing plate is fixedly connected to the hollow anchor rod.

[0014] Through the above structural design, the support rod and the fixing plate form a rigid support frame, which fixes the cylinder and the hollow anchor rod together.

[0015] Furthermore, the limiting member includes a limiting block fixedly connected to the telescopic rod, and a hollow groove is provided on the inner side of the limiting block. A slider is slidably disposed in the hollow groove, and the slider is adapted to the groove.

[0016] The above structural design facilitates the sliding of the adjusting drill bit 26 on the guide rail 29, thereby allowing the position of the adjusting drill bit 26 to be freely adjusted.

[0017] Furthermore, a spring is fixedly installed on the slider, and the end of the spring away from the slider is fixedly connected to the inner wall of the hollow groove.

[0018] Through the above structural design, the spring provides a controllable restoring force, ensuring that the slider can quickly spring back to the outside of the hollow groove.

[0019] Furthermore, a guide rail is fixedly installed on the outer side of the hollow anchor rod, and the guide rail is slidably connected to the adjusting drill bit.

[0020] Through the above structural design, the guide rail constrained adjustment drill bit slides only along the axial direction of the hollow anchor rod, completely eliminating the risk of circumferential sway.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the variable diameter enlarged head anchor bolt drilling machine expands the hole diameter by dynamically adjusting the drill bit diameter, while maintaining the alignment of the chip removal guide groove to ensure smooth chip removal, thereby improving the drilling quality. The specific details are as follows:

[0022] When using this variable diameter enlarging head anchor drilling machine, the slider inside the limiting block extends out of the hollow groove under the action of the spring. At this time, the limiting part presses and fixes the drill bit to form the minimum drilling diameter. When drilling into weak rock and soil layers and the hole diameter needs to be enlarged, the slider is pressed by external force, so that the slider enters the hollow groove. At the same time, the position of the drill bit is adjusted by moving the guide rail. Then, the external force is released from the limiting of the slider, and the cylinder is activated. The cylinder pushes the telescopic rod to move, so that the limiting part presses the adjusting drill bit, while the limiting part stops the remaining adjusting drill bit. The drill bit hole diameter is enlarged, and the chip removal guide groove remains aligned to ensure smooth chip removal. Thus, by changing the drill bit diameter, the hole diameter is enlarged, and the drilling quality is improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the anchor drill bit assembly of this utility model;

[0025] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A;

[0026] Figure 4 This is a schematic diagram of the connection structure between the telescopic rod and the limiting component of this utility model;

[0027] Figure 5 This is a schematic diagram of the internal structure of the limiting component of this utility model.

[0028] In the diagram: 1. Drilling rig connector; 2. Anchor bolt drill bit assembly; 20. Connecting rod; 21. Cylinder; 22. Fixing plate; 23. Hollow anchor bolt; 24. Fixed drill bit; 25. Chip removal guide channel one; 26. Adjusting drill bit; 27. Chip removal guide channel two; 28. Groove; 29. ​​Guide rail; 210. Telescopic rod; 211. Limiting component; 212. Support rod; 2110. Limiting block; 2111. Hollow groove; 2112. Slider; 2113. Spring. Detailed Implementation

[0029] 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.

[0030] like Figures 1-5 As shown, this utility model discloses a variable diameter enlarged head anchor bolt drilling machine, including a drilling machine connector 1 connected to the drilling machine body, and an anchor bolt drill bit assembly 2 for drilling is fixedly connected to one end of the drilling machine connector 1 away from the drilling machine body. The anchor bolt drill bit assembly 2 includes a connecting rod 20 fixedly connected to the drilling machine connector 1, and a control component for adjusting the size of the drill hole is provided at one end of the connecting rod 20 away from the drilling machine connector 1. A hollow anchor bolt 23 is fixedly provided on the control component, and a fixed drill bit 24 is fixedly provided at one end of the hollow anchor bolt 23 away from the control component. A chip removal guide groove 25 is provided on the fixed drill bit 24, and an adjusting drill bit 26 is slidably provided on the outer side of the hollow anchor bolt 23. A second chip removal guide groove 27 that matches the first guide groove 25 is provided on the adjusting drill bit 26.

[0031] The control mechanism includes a cylinder 21 connected to the connecting rod 20, and a telescopic rod 210 is provided at the output end of the cylinder 21. A groove 28 is provided on the hollow anchor rod 23, and two limiting members 211 are provided on the hollow anchor rod 23. The two limiting members 211 cooperate with the groove 28 to adjust the position of the drill bit 26. By driving the telescopic rod 210 through the cylinder 21, the cooperation between the limiting members 211 and the groove 28 is controlled, so as to achieve precise mechanical control of the position of the drill bit 26. It can quickly respond to the strength changes of different soil and rock layers: in the weak layer, the cylinder can push the limiting members to release the adjusting drill bit to expand the hole diameter; in the hard layer, the limiting members retract to maintain a small hole diameter.

[0032] The two limiting components 211 are as follows: the one closer to the fixed drill bit 24 is the limiting component one, and the one farther away from the fixed drill bit 24 is the limiting component two. The limiting component one is used to press the adjusting drill bit 26 into contact with the fixed drill bit 24, and the limiting component two is used to prevent the remaining adjusting drill bit 26 from moving away from the fixed drill bit 24. The division of labor between the limiting components one and two is clear: the limiting component one ensures that the adjusting drill bit 26 and the fixed drill bit 24 are in close contact to form the maximum enlarged hole diameter; the limiting component two prevents the remaining adjusting drill bit 26 from moving away from the fixed drill bit 24, ensuring the reliability of hole diameter changes and avoiding insufficient hole diameter due to drill bit loosening.

[0033] The distance between limiter one and limiter two is greater than the required drilling depth. The design of the limiter spacing being greater than the hole depth ensures that the adjusting drill bit 26 is always controlled throughout the entire drilling stroke. Limiter two can effectively block the adjusting drill bit, preventing it from adversely affecting the fixed drill bit during drilling, thereby ensuring the stability of the diameter changing operation throughout the entire process.

[0034] A support rod 212 is fixedly installed on the cylinder 21. A fixing plate 22 is fixedly installed at the end of the support rod 212 away from the cylinder 21. The fixing plate 22 is fixedly connected to the hollow anchor rod 23. The support rod 212 and the fixing plate 22 form a rigid support frame, which fixes the cylinder 21 and the hollow anchor rod 23 into one unit, disperses the torsional stress during drilling, prevents the cylinder 21 from shifting or being damaged due to vibration, improves the durability of the control components, and ensures the movement accuracy of the telescopic rod 210 and the limiting member 211.

[0035] The limiting member 211 includes a limiting block 2110 fixedly connected to the telescopic rod 210, and a hollow groove 2111 is provided on the inner side of the limiting block 2110. A slider 2112 is slidably arranged in the hollow groove 2111, and the slider 2112 is adapted to the groove 28. In use, the slider 2112 is pushed into the hollow groove 2111 by external force, which will facilitate the adjustment drill bit 26 to slide on the guide rail 29, thereby freely adjusting the position of the adjustment drill bit 26.

[0036] A spring 2113 is fixedly installed on the slider 2112, and the end of the spring 2113 away from the slider 2112 is fixedly connected to the inner wall of the hollow groove 2111. The elastic coefficient of the spring 2113 is determined according to the actual situation. It provides a controllable reset force to ensure that the slider 2112 can quickly rebound to the outside of the hollow groove 2111, making operation convenient.

[0037] A guide rail 29 is fixedly installed on the outer side of the hollow anchor rod 23, and the guide rail 29 is slidably connected to the adjusting drill bit 26. The guide rail 29 constrains the adjusting drill bit 26 to slide only along the axial direction of the hollow anchor rod 23, completely eliminating the risk of circumferential sway. This not only ensures that the chip removal guide channel 1 25 and the chip removal guide channel 27 are always precisely aligned and maintain efficient chip removal, but also prevents irregular hole diameter or drill rod vibration caused by the rotational imbalance of the adjusting drill bit 26, thus improving the hole formation quality.

[0038] When using this variable diameter enlarged head anchor drilling machine, in the initial state, the slider 2112 inside the limiting block 2110 extends out of the hollow groove 2111 under the action of the spring 2113. At this time, the limiting part one presses and fixes the drill bit 24 to form the minimum drilling diameter. When drilling into a weak rock and soil layer and it is necessary to enlarge the hole diameter, the slider 2112 is pressed by external force, so that the slider 2112 enters the hollow groove 2111. At the same time, the position of the drill bit 26 is adjusted by moving the guide rail 29. Then, the external force is released from the limitation of the slider 2112, and the cylinder 21 is activated. The cylinder 21 pushes the telescopic rod 210 to move, so that the limiting part one presses the adjusting drill bit 26, while the limiting part two blocks the remaining adjusting drill bit 26. The drill hole diameter is enlarged, and the chip removal guide grooves 25 and 27 remain aligned to ensure smooth chip removal. Thus, by changing the drill bit diameter, the hole diameter is enlarged, and the drilling quality is improved.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A variable diameter enlarged head anchor bolt drilling machine, characterized in that, The system includes a drilling rig connector (1) connected to the drilling rig body, and an anchor drill bit assembly (2) for drilling is fixedly connected to one end of the drilling rig connector (1) away from the drilling rig body. The anchor drill bit assembly (2) includes a connecting rod (20) fixedly connected to the drilling rig connector (1), and a control component for adjusting the borehole diameter is provided at one end of the connecting rod (20) away from the drilling rig connector (1). A hollow anchor rod (23) is fixedly provided on the control component. A fixed drill bit (24) is fixedly provided at one end of the hollow anchor rod (23) away from the control component. A chip removal guide groove one (25) is provided on the fixed drill bit (24). An adjusting drill bit (26) is slidably provided on the outside of the hollow anchor rod (23), and a chip removal guide groove two (27) that matches the guide groove one (25) is provided on the adjusting drill bit (26).

2. The variable diameter enlarged head anchor bolt drilling machine according to claim 1, characterized in that: The control component includes a cylinder (21) connected to the connecting rod (20), and the output end of the cylinder (21) is provided with a telescopic rod (210). The hollow anchor rod (23) is provided with a groove (28), and the hollow anchor rod (23) is provided with two limiting members (211). The two limiting members (211) cooperate with the groove (28) to adjust the position of the drill bit (26).

3. The variable diameter enlarged head anchor bolt drilling machine according to claim 2, characterized in that: The two limiting members (211) are the first limiting member that is closer to the fixed drill bit (24) and the second limiting member that is farther away from the fixed drill bit (24). The first limiting member is used to press the adjusting drill bit (26) against the fixed drill bit (24), and the second limiting member is used to block the remaining adjusting drill bit (26) from moving away from the fixed drill bit (24).

4. The variable diameter enlarged head anchor bolt drilling machine according to claim 3, characterized in that: The distance between the first limiting member and the second limiting member is greater than the depth of the hole to be drilled.

5. The variable diameter enlarged head anchor bolt drilling machine according to claim 2, characterized in that: A support rod (212) is fixedly installed on the cylinder (21). A fixing plate (22) is fixedly installed at the end of the support rod (212) away from the cylinder (21), and the fixing plate (22) is fixedly connected to the hollow anchor rod (23).

6. The variable diameter enlarged head anchor bolt drilling machine according to claim 2, characterized in that: The limiting member (211) includes a limiting block (2110) fixedly connected to the telescopic rod (210), and a hollow groove (2111) is provided on the inner side of the limiting block (2110). A slider (2112) is slidably provided in the hollow groove (2111), and the slider (2112) is adapted to the groove (28).

7. The variable diameter enlarged head anchor bolt drilling machine according to claim 6, characterized in that: A spring (2113) is fixedly installed on the slider (2112), and the end of the spring (2113) away from the slider (2112) is fixedly connected to the inner wall of the hollow groove (2111).

8. The variable diameter enlarged head anchor bolt drilling machine according to claim 1, characterized in that: The hollow anchor rod (23) is fixedly provided with a guide rail (29) on its outer side, and the guide rail (29) is slidably connected to the adjusting drill bit (26).

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