Reaming drilling tool for expanded anchor rod

Abstract

The utility model relates to the technical field of broaching drill bits, and discloses a broaching drilling tool for a broaching anchor rod, which comprises a hole bottom drill bit, a cone joint and a broaching mechanism, the broaching mechanism comprises a cylindrical shell, a plurality of cutter grooves penetrating into an inner cavity are arranged on the side wall of the cylindrical shell, and broaching cutters are slidably sleeved in the cutter grooves. A push-down mechanism is fixedly installed on the inner wall of the cylindrical shell, the output end of the push-down mechanism is in butt joint with a plurality of expansion assemblies, the expansion assemblies are in butt joint with the reaming cutters, the push-down mechanism is used for controlling the expansion assemblies to drive the reaming cutters to move, and the bottom of the conical connector is fixedly connected with the top end of the push-down mechanism; according to the reaming drilling tool, the reaming cutters move towards the outer ring, drilling hole expanding is achieved through high-speed rotation, the distance of the reaming cutters moving towards the outer ring can be controlled through cooperation of the expanding assembly and the downward pushing mechanism, the drilling hole expanding adjustable effect is achieved, and compared with a traditional single expanding size, the reaming drilling tool can better meet the actual requirements of users.

Description

Technical Field

[0001] This utility model relates to the field of hole reaming drill bit technology, and more specifically to a hole reaming drill bit for reaming anchor bolts. Background Technology

[0002] Expanded anchor bolts are a new type of anchor bolt used in geotechnical anchoring engineering. After being placed in a hole, cement grout or cement mortar is injected into the expanded structure, causing it to expand and compress the surrounding soil. The anchoring force is provided by the interaction between the expanded section and the compacted soil, especially the end-bearing effect. However, the use of expanded anchor bolts requires drilling with a reaming tool. For example, Chinese patent (CN2301530Y) discloses an "anchor bolt bottom-expanding drill bit." This reamer mainly includes a cutter blade, a torque transmission sleeve, and a rack and pinion device. This reamer uses a rack fixed to the pressure rod to drive a gear fixed to the cutter blade, controlling the opening and closing of the cutter blade at the bottom of the hole. The reamer expands the hole diameter to 2-3 times the original hole diameter, thus enabling the placement of the expanded structure portion of the expanded anchor bolt.

[0003] However, traditional reaming tools have drawbacks. For example, when reaming, the diameter cannot be adjusted. Once reaming is triggered, the diameter can only be expanded to a fixed size. Therefore, it is impossible to select the reaming size according to the needs in different application scenarios, which causes inconvenience to use. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a hole-reaming drill for expanding anchor bolts, so as to solve the problem that traditional hole-reaming drills in the background art cannot freely adjust the hole size according to actual needs.

[0005] This utility model provides the following technical solution: a hole-reaming drill bit for expanding anchor bolts, including a bottom hole drill bit and a tapered joint, and a hole-reaming mechanism. The hole-reaming mechanism includes a cylindrical shell, and the side wall of the cylindrical shell has several through-hole grooves that penetrate into the inner cavity. Each groove has a reaming cutter slidably fitted inside it. A pushing mechanism is fixedly installed on the inner wall of the cylindrical shell. The output end of the pushing mechanism is connected to several extension components, and the extension components are connected to several reaming cutters. The pushing mechanism is used to control the extension components to drive the displacement of the several reaming cutters. The bottom of the tapered joint is fixedly connected to the top of the pushing mechanism, and the top of the bottom hole drill bit is fixedly connected to the bottom of the cylindrical shell. The pushing mechanism is connected to the inner wall of the cylindrical shell through a torque switching component. The torque switching component is used to transmit the forward rotation torque of the tapered joint to the pushing mechanism and the reverse rotation torque to the cylindrical shell.

[0006] Furthermore, several of the extended components include a movable disk with several slots at the bottom, each slot having a movably connected flip arm. Each of the several reaming cutters has an installation groove on its inner side. The other end of each flip arm is movably connected to the inner wall of the installation groove. The top of the movable disk has a through hole, and the output end of the pushing mechanism is fixedly connected to the through hole of the movable disk.

[0007] Furthermore, the pushing mechanism includes a connector post, a polygonal post fixedly connected to the bottom end of the connector post, a threaded cylinder slidably sleeved on the side wall of the polygonal post, a fixed disc threadedly sleeved on the side wall of the threaded cylinder, the side wall of the fixed disc being fixedly connected to the inner wall of the cylindrical shell, an output rod rotatably sleeved on the bottom end of the threaded cylinder, the side wall of the output rod being connected to several expansion components, and the side wall of the connector post being connected to a torque switching component.

[0008] Furthermore, the torque switching assembly includes an inner ratchet and a pawl disc assembly. The sidewall of the inner ratchet is fixedly connected to the inner wall of the cylindrical shell, and the pawl disc assembly is fixedly connected to the sidewall of the connector column. The pawl disc assembly rotates in the reverse direction to engage with the ratchet teeth of the inner ratchet, and when the pawl disc assembly rotates in the forward direction, its pawl contracts under the counter-thrust force of the ratchet teeth of the inner ratchet.

[0009] Furthermore, the ratchet disk assembly includes a main disk body, and a plurality of sliding grooves are formed on the periphery of the main disk body. A ratchet body is slidably sleeved in each of the plurality of sliding grooves. The ratchet body is connected to the inner wall of the sliding groove of the ratchet disk assembly by a spring. The plurality of ratchet bodies are respectively engaged in the ratchet teeth of the inner ratchet wheel.

[0010] Furthermore, the inner wall of the main disc slide groove is provided with a strip-shaped groove, and a positioning block is fixedly connected to the side wall of the pawl body, and the positioning block slides and engages within the strip-shaped groove.

[0011] Furthermore, the bottom of several of the aforementioned reaming tools is provided with a beveled surface.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] This utility model achieves hole enlargement by displacing several reaming cutters outward and rotating them at high speed. The distance the reaming cutters move outward can be controlled by the expansion component and the push mechanism, thus achieving an adjustable hole enlargement effect. Compared with the traditional single-size enlargement, this reaming drill can better meet the actual needs of users and has a wider range of applications.

[0014] In addition, the hole reaming operation method has been optimized. Under the action of the torque switching component, the conical joint can be rotated in the opposite direction to control the overall rotation of the drill bit for drilling, while the forward rotation can realize the hole reaming operation. Compared with the traditional control method, there is no need for torsional force to cooperate with vertical pressure to unfold the reaming tool, making the operation simpler and faster. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 A schematic diagram of the hole-expanding mechanism in the diagram;

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the extended component structure in the diagram;

[0018] Figure 4 This utility model Figure 2 A schematic diagram of the downward pushing mechanism in the middle;

[0019] Figure 5 This utility model Figure 2 A schematic diagram of the torque switching component structure.

[0020] The attached figures are labeled as follows: 1. Hole reaming mechanism; 2. Hole bottom drill bit; 3. Tapered connector; 11. Cylindrical shell; 12. Reamer; 13. Extension assembly; 14. Push-down mechanism; 15. Torque switching assembly; 121. Mounting slot; 131. Moving disc; 132. Tilting arm; 141. Connector post; 142. Polygonal post; 143. Threaded cylinder; 144. Fixed disc; 145. Output rod; 151. Inner ratchet; 152. Pawl disc assembly; 153. Main disc body; 154. Pawl body; 155. Spring; 156. Positioning block. Detailed Implementation

[0021] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0022] Reference Figure 1 and Figure 2 This utility model provides a hole-reaming drill for expanding anchor bolts, including a bottom hole drill bit 2, a tapered connector 3, and a hole-reaming mechanism 1. The hole-reaming mechanism 1 includes a cylindrical shell 11, with several through-hole grooves on the side wall of the cylindrical shell 11, each groove containing a reaming cutter 12. A pushing mechanism 14 is fixedly installed on the inner wall of the cylindrical shell 11, with several extension components 13 connected to the output end of the pushing mechanism 14. The extension components 13 are connected to the several reaming cutters 12. The pushing mechanism 14 is used to control the extension components 13 to drive the several reaming cutters 12 to move. The bottom of the tapered connector 3 is fixedly connected to the top of the pushing mechanism 14, and the top of the bottom hole drill bit 2 is fixedly connected to the bottom of the cylindrical shell 11. The pushing mechanism 14 is connected to the inner wall of the cylindrical shell 11 through a torque switching component 15. The torque switching component 15 is used to transmit the forward rotation torque of the tapered connector 3 to the pushing mechanism 14 and the reverse rotation torque to the cylindrical shell 11.

[0023] During normal drilling, several reamers 12 are in a contracted state inside the cylindrical shell 11. The anchor rod outputs a counter-rotating knob to drive the conical joint 3 to rotate in the opposite direction. At this time, under the action of the torque switching component 15, the cylindrical shell 11 is controlled to rotate in the opposite direction, causing the bottom drill bit 2 to rotate at high speed to drill. When the bottom drill bit 2 reaches the predetermined bottom layer, the anchor rod outputs a forward rotational force to drive the conical joint 3 to rotate in the forward direction. At this time, under the action of the torque switching component 15, the torque is transmitted to the downward pushing mechanism 14, triggering the operation of the downward pushing mechanism 14. At this time, the cylindrical shell 11 is stationary under the action of soil friction. After the downward pushing mechanism 14 is in operation, it drives the expansion component 13 to gradually unfold, causing several reamers 12 to move under the pushing force of the unfolding expansion component 13. After the several reamers 12 are moved, they achieve the effect of expanding towards the outer circle of the cylindrical shell 11. At this time, by reversing the conical joint 3, the several reamers 12 can expand the diameter of the drill hole.

[0024] Reference Figure 3 The extended components 13 include a movable disk 131, the bottom of which has several slots, and a flipping arm 132 is movably connected to each of the slots. The inner sides of several reaming cutters 12 are provided with mounting grooves 121. The other end of the flipping arm 132 is movably connected to the inner wall of the mounting groove 121. The top of the movable disk 131 has a through hole, and the output end of the push mechanism 14 is fixedly connected to the through hole of the movable disk 131.

[0025] When the pushing mechanism 14 operates, it outputs a downward pushing force, which drives the moving disk 131 to move downward. When the moving disk 131 moves downward, it causes the tops of several rotating arms 132 to be turned and rotated, gradually making them tend to be horizontal. During this process, the rotating arms 132 push the several reaming cutters 12, thereby enabling the several reaming cutters 12 to expand outward. The rotation angle of the rotating arms 132 can be controlled by the distance output by the pushing mechanism 14, thereby controlling the displacement distance of the reaming cutters 12, and thus controlling the diameter expansion size of the drill bit.

[0026] Reference Figure 4 The push mechanism 14 includes a connector post 141, a polygonal post 142 fixedly connected to the bottom end of the connector post 141, a threaded cylinder 143 slidably sleeved on the side wall of the polygonal post 142, a fixed disk 144 threadedly sleeved on the side wall of the threaded cylinder 143, the side wall of the fixed disk 144 fixedly connected to the inner wall of the cylindrical shell 11, an output rod 145 rotatably sleeved on the bottom end of the threaded cylinder 143, the side wall of the output rod 145 docking with several extension components 13, and the side wall of the connector post 141 docking with the torque switching component 15.

[0027] The top of the connector post 141 is fixedly connected to the bottom of the conical connector 3. When the conical connector 3 rotates clockwise, the torque is transmitted to the connector post 141, which drives the polygonal post 142 to rotate. Due to the shape characteristics of the polygonal post 142, the threaded cylinder 143 can rotate synchronously. When the threaded cylinder 143 rotates, the cylindrical shell 11 remains stationary due to soil friction. At this time, the fixed plate 144 is stationary under the action of the cylindrical shell 11. However, through the threaded engagement between the threaded cylinder 143 and the fixed plate 144, the threaded cylinder 143 can be displaced outward, which drives the output rod 145 to generate a downward thrust.

[0028] Reference Figure 5 The torque switching assembly 15 includes an inner ratchet 151 and a pawl disk assembly 152. The side wall of the inner ratchet 151 is fixedly connected to the inner wall of the cylindrical shell 11. The pawl disk assembly 152 is fixedly connected to the side wall of the connector post 141. The pawl disk assembly 152 rotates in the opposite direction and engages with the ratchet teeth of the inner ratchet 151. When the pawl disk assembly 152 rotates in the forward direction, its pawl is retracted by the counter-thrust force of the ratchet teeth of the inner ratchet 151.

[0029] The torque switching component 15 adopts the principle of ratchet mechanism, which restricts the ratchet disk component 152 to rotate only in one direction relative to the inner ratchet 151. When the ratchet disk component 152 rotates in the opposite direction, the ratchet disk component 152 and the inner ratchet 151 are connected. At this time, the ratchet disk component 152 drives the ratchet disk component 152 to rotate. Through the connection between the ratchet disk component 152 and the cylindrical shell 11, the torque can be transmitted to the cylindrical shell 11. When the ratchet disk component 152 rotates in the forward direction, it rotates independently, and the torque can be transmitted to the connector post 141.

[0030] Reference Figure 5 The ratchet disc assembly 152 includes a main disc body 153. Several grooves are provided around the main disc body 153. A ratchet body 154 is slidably sleeved in each of the grooves. The ratchet body 154 is connected to the inner wall of the groove of the ratchet disc assembly 152 by a spring 155. The ratchet bodies 154 are respectively engaged in the ratchet teeth of the inner ratchet 151.

[0031] When the pawl assembly 152 rotates clockwise, the pawl body 154 contracts due to the ratchet tooth slope of the inner ratchet 151. When it reaches the next ratchet tooth, the spring force of the spring 155 causes the pawl body 154 to engage with the ratchet tooth. When the pawl assembly 152 rotates counterclockwise, the pawl body 154 and the inner ratchet 151 are engaged, thereby driving the inner ratchet 151 to rotate.

[0032] Reference Figure 5 The inner wall of the main disc body 153 slide groove is provided with a strip groove, and the side wall of the pawl body 154 is fixedly connected with a positioning block 156. The positioning block 156 slides in the strip groove. This structure can prevent the pawl body 154 from falling out of the pawl disc assembly 152 slide groove.

[0033] Reference Figure 3 Several reaming cutters 12 have beveled surfaces at their bottoms.

[0034] When several reamers 12 expand outward and rotate at high speed to enlarge the diameter of the borehole, the shape of the bottom of the reamers 12 can be designed so that the bottom of the reamers 12 forms a conical surface when the reamers 12 rotate at high speed, thereby avoiding the soil from generating a large resistance to the bottom of the reamers 12.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. This utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A reamer for a body anchor, comprising a bottom hole drill bit (2), a taper joint (3), characterized in that: The utility model provides a reamer mechanism (1), the reamer mechanism (1) includes the cylindrical shell (11), the cylindrical shell (11) side wall is equipped with a plurality of cutter groove that goes into the inner chamber, the cutter groove is slidably sleeved with reamer (12) in, the cylindrical shell (11) inner wall is fixedly installed with push mechanism (14), the push mechanism (14) output end is docked with a plurality of expansion assembly (13), a plurality of expansion assembly (13) with a plurality of reamer (12) docking, push mechanism (14) is used for controlling expansion assembly (13) to drive a plurality of reamer (12) displacement, the taper joint (3) bottom and push mechanism (14) top fixed connection, the hole bottom drill bit (2) top and cylindrical shell (11) bottom fixed connection, push mechanism (14) is connected through torsion switching assembly (15) with the cylindrical shell (11) inner wall, the torsion switching assembly (15) is used for the transmission of taper joint (3) positive rotation torsion to push mechanism (14), and the transmission of reverse rotation torsion to cylindrical shell (11).

2. The reamer tool for an expanded anchor according to claim 1, wherein: A plurality of expansion assembly (13) includes moving disc (131), the moving disc (131) bottom is equipped with a plurality of notches, a plurality of notches are movably connected with turnover arm (132) in, a plurality of reamer (12) inner side are all equipped with installation groove (121), turnover arm (132) other end is movably connected in installation groove (121) inner wall, the moving disc (131) top is equipped with through -hole, and the push mechanism (14) output end is fixedly connected in moving disc (131) through -hole.

3. The reamer tool according to claim 1, wherein: The push mechanism (14) includes joint column (141), the joint column (141) bottom fixedly connected with polygonal column (142), the polygonal column (142) side wall is slidably sleeved with screw drum (143), the screw drum (143) side wall is threadedly sleeved with fixed disc (144), the fixed disc (144) side wall is fixedly connected in the cylindrical shell (11) inner wall, the screw drum (143) bottom rotatably sleeved with output rod (145), the output rod (145) side wall is docked with a plurality of expansion assembly (13), the joint column (141) side wall is docked with torsion switching assembly (15).

4. The reamer tool according to claim 3, characterized in that: The torsion switching assembly (15) includes inner ratchet wheel (151), pawl disc assembly (152), the inner ratchet wheel (151) side wall is fixedly connected with the cylindrical shell (11) inner wall, the pawl disc assembly (152) is fixedly connected on the joint column (141) side wall, the pawl disc assembly (152) is reverse rotation and the ratchet of inner ratchet wheel (151) engagement, and the pawl of pawl disc assembly (152) is retracted by the ratchet of inner ratchet wheel (151) counterthrust when it is positive rotation.

5. A reamer tool for an expanded anchor according to claim 4, characterized in that: The pawl disc assembly (152) includes main disc body (153), the main disc body (153) is equipped with a plurality of slide grooves, a plurality of slide grooves are slidably sleeved with pawl main body (154) in, the pawl main body (154) is transmissionally connected with the slide groove inner wall of pawl disc assembly (152) through spring (155), and a plurality of pawl main body (154) are engaged into the ratchet of inner ratchet wheel (151) respectively.

6. A reamer tool for an expanded anchor according to claim 5, characterized in that: The main disc body (153) is provided with a strip-shaped groove in the inner wall of the sliding groove, and the side wall of the pawl main body (154) is fixedly connected with a positioning block (156), and the positioning block (156) is slidably sleeved in the strip-shaped groove.

7. The reamer tool according to claim 1, wherein: The bottom of each of the reamers (12) is provided with a bevel.

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