Rotary excavating reamer for cast-in-place pile

Abstract

The utility model discloses a rotary excavating reamer for a cast-in-place pile, and particularly relates to the technical field of engineering reaming equipment. The rotary excavating reamer for the cast-in-place pile comprises a connecting shaft, a driving box is arranged at the bottom end of the connecting shaft, a base is fixedly connected to the bottom of the driving box, a conical drill bit used for rotary excavating of the cast-in-place pile is fixedly connected to the bottom of the base, a plurality of rotating discs are rotationally connected to the base, and a positioning block is fixedly connected to each rotating disc. A tool apron is movably connected to the positioning block, and a reaming tool is fixedly connected to the tool apron. And a plurality of transmission connecting pieces are arranged in the driving box, the transmission connecting pieces are movably connected with the positioning blocks, and a driving mechanism is arranged in the driving box and used for driving the transmission connecting pieces to rotate so as to drive the reaming cutter to achieve angle adjustment. The utility model solves the problems that the linkage property of the reamer is insufficient in the process of adjusting the hole diameter of a reaming hole, and the assembly efficiency of the reaming piece is low in the disassembly and assembly process.

Description

Technical Field

[0001] This utility model relates to the technical field of engineering hole reaming equipment, specifically to a rotary drilling reamer for cast-in-place piles. Background Technology

[0002] Cast-in-place piles are concrete columns formed underground to provide support and stability for buildings or other structures. Before the piles are poured, the bottom area needs to be enlarged to ensure their bearing capacity.

[0003] For example, patent publication number CN221664653U discloses a reamer that facilitates drill bit replacement. The reamer body has multiple adapters evenly distributed on its arc surface. These adapters are telescopically connected to the reamer body. A reaming wheel is connected to the bottom of each adapter, and the adapter is used to adjust the position of the reaming wheel. The reaming wheel is tilted and rotatably connected to the adapter. A drill bit is mounted on the bottom of the reamer body. Multiple adapters are telescopically connected to the side of the reamer, and the reaming wheel is connected to the bottom of each adapter. The reaming wheel allows for reaming at a specified location. Since the adapters are telescopic, the reamer can be extended a certain distance according to the required hole diameter, facilitating adjustment of the reamer based on usage needs and effectively improving its flexibility. A locking sleeve is fitted at the bottom of the reamer, which can lock the reamer and drill bit together, ensuring a stable connection between the drill bit and the reamer.

[0004] In the aforementioned patent, the inventor believes that although the hole-expanding component satisfies the adjustability and detachability of the hole diameter during use, there is insufficient linkage in the process of adjusting the hole diameter. In addition, the hole-expanding component has the problem of low assembly efficiency during disassembly and assembly. Utility Model Content

[0005] This utility model provides a rotary drilling reamer for cast-in-place piles to solve the technical problems in the prior art, which are that the reamers are relatively independent when adjusting the reamers' angles and that the reamers are fixed by bolts, resulting in insufficient linkage in adjusting the reamer diameter and low assembly efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rotary drilling reamer for cast-in-place piles includes a connecting shaft, a drive box at the bottom of the connecting shaft, a base fixedly connected to the bottom of the drive box, a conical drill bit for rotary drilling of cast-in-place piles fixedly connected to the bottom of the base, a plurality of rotating disks rotatably connected to the base, a positioning block fixedly connected to each rotating disk, a cutter holder movably connected to the positioning block, and a reaming cutter fixedly connected to the cutter holder.

[0008] The drive box is equipped with multiple transmission connectors, which are movably connected to the positioning block. The drive box is also equipped with a drive mechanism, which drives the transmission connectors to rotate so as to adjust the angle of the reaming cutter.

[0009] Furthermore, a cover plate is bolted to the bottom of the drive box, and the cover plate is fixedly connected to the bottom end of the connecting shaft.

[0010] Furthermore, the transmission connector includes a transmission rod, which is slidably connected to the drive box. A positioning plate is fixedly connected to the bottom end of the transmission rod, a limit ring is fixedly connected to the outer surface of the transmission rod, and a spring is sleeved on the outer surface of the transmission rod.

[0011] Furthermore, the transmission rod is slidably connected to the cover plate, and a handle is detachably connected to the top end of the transmission rod.

[0012] Furthermore, the tool holder is movably inserted into the positioning block, and the positioning disk is movably inserted into the positioning block and abuts against the tool holder. The positioning disk is disposed on the outside of the drive box, the limiting ring is disposed on the inside of the drive box, and one end of the spring abuts against the limiting ring.

[0013] Furthermore, the drive mechanism includes a support column, which is fixedly connected inside the drive housing. The support column is rotatably connected to the worm gear, and a worm is drivenly connected to the worm gear. A central gear is fixedly connected to the bottom of the worm gear, and a peripheral gear is meshed with the central gear.

[0014] Furthermore, a bracket is fixedly connected to the inner wall of the drive box, a gear sleeve is rotatably connected to the bracket, the outer gear is fixedly connected to the outer surface of the gear sleeve, the transmission rod is slidably connected to the inner side of the gear sleeve, a groove is provided on the outer surface of the transmission rod, and a limiting slider that slides in cooperation with the groove is provided on the inner side of the gear sleeve.

[0015] Furthermore, a pair of brackets are fixedly connected inside the drive box, and the worm gear is rotatably connected to the pair of brackets. A gear pair is provided at one end of the worm gear, and a drive rod is fixedly connected to the gear pair. The drive rod is rotatably connected to the cover plate, and a handle is detachably connected to the top end of the drive rod.

[0016] This utility model has the following advantages:

[0017] 1. The present invention relates to a rotary drilling reamer for cast-in-place piles. By setting a drive box between the connecting shaft and the tapered drill bit, the drive box can be equipped with a built-in drive mechanism to provide self-locking rotary drive for multiple transmission connectors. Under the condition of ensuring drive stability, the transmission connectors drive the reamer cutters at the corresponding positions to rotate around the shaft. In this way, multiple reamer cutters can perform an angle-adjustable unfolding action above the tapered drill bit. Multiple reamer cutters can meet the requirements of efficient hole reaming while also adapting to the needs of different hole diameters.

[0018] 2. The present invention relates to a rotary drilling reamer for cast-in-place piles. The transmission connecting component provides transmission to the reamer through the driving mechanism, while the transmission tie rod can be stretched. In addition, the positioning block and the positioning plate are connected by insertion. Thus, the cutter holder set on the positioning plate and the positioning block can be easily and quickly clamped and fixed or disassembled, resulting in high assembly and disassembly efficiency. Attached Figure Description

[0019] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] Figure 1 A schematic diagram of the structure of a rotary drilling reamer for cast-in-place piles provided by this utility model;

[0022] Figure 2 Internal view of the drive box provided by this utility model;

[0023] Figure 3 A schematic diagram of the transmission connector and reamer provided by this utility model;

[0024] Figure 4 Provided by this utility model Figure 3 A partial split diagram;

[0025] Figure 5 Provided by this utility model Figure 2 Enlarged view of section A.

[0026] In the diagram: 1. Connecting shaft; 2. Drive box; 3. Base; 4. Tapered drill bit; 5. Rotary disk; 6. Positioning block; 7. Tool holder; 8. Reamer; 9. Transmission connector; 91. Transmission rod; 92. Positioning disk; 93. Limiting ring; 94. Spring; 10. Drive mechanism; 101. Support column; 102. Worm gear; 103. Worm; 104. Central gear; 105. Peripheral gear; 11. Cover plate; 12. Bracket 1; 13. Gear sleeve; 14. Handle 1; 15. Bracket 2; 16. Gear pair; 17. Drive rod; 18. Handle 2. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] See also Figures 1-5 This utility model provides a rotary drilling reamer for cast-in-place piles, including a connecting shaft 1, which can be connected to a reaming machine. A drive box 2 is provided at the bottom of the connecting shaft 1, and a base 3 is fixedly connected to the bottom of the drive box 2. A conical drill bit 4 for rotary drilling of cast-in-place piles is fixedly connected to the bottom of the base 3. The conical drill bit 4 can first drill holes for the cast-in-place piles in the ground. Multiple rotating disks 5 are rotatably connected to the base 3. A positioning block 6 is fixedly connected to each rotating disk 5. A cutter holder 7 is movably connected to the positioning block 6. A reaming cutter 8 is fixedly connected to the cutter holder 7. The reaming cutter 8 is made of alloy material. The rotating reaming cutter 8 can perform reaming treatment on the cast-in-place pile.

[0029] The bottom of the drive box 2 is bolted with a cover plate 11, which is fixedly connected to the bottom end of the connecting shaft 1. The cover plate 11 is easy to remove from the drive box 2, which facilitates the maintenance of the internal structure of the drive box 2.

[0030] The drive box 2 is provided with multiple transmission connectors 9, which are movably connected to the positioning block 6. The drive box 2 is provided with a drive mechanism 10, which is used to drive the transmission connectors 9 to rotate so as to drive the reaming cutter 8 to achieve angle adjustment.

[0031] The transmission connector 9 includes a transmission rod 91, which is slidably connected to the drive box 2. A positioning plate 92 is fixedly connected to the bottom end of the transmission rod 91. A limit ring 93 is fixedly connected to the outer surface of the transmission rod 91. The limit ring 93 can be used to limit the downward movement path of the transmission rod 91 on the drive box 2. A spring 94 is sleeved on the outer surface of the transmission rod 91.

[0032] The transmission rod 91 is slidably connected to the cover plate 11. A handle 14 is detachably connected to the top of the transmission rod 91. The handle 14 is designed to facilitate lifting the transmission rod 91. The handle 14 can be detached and connected by a threaded connection. When removing the cover plate 11 on the drive box 2, the cover plate 11 can be easily removed based on the transmission rod 91 because the transmission rod 91 is slidably set on the cover plate 11.

[0033] The tool holder 7 is movably inserted into the positioning block 6. In this application, the positioning block 6 is configured with a cross-shaped structure, and the positioning disk 92 is movably inserted into the positioning block 6 and abuts against the tool holder 7. The positioning disk 92 is located on the outside of the drive box 2, and the limiting ring 93 is located on the inside of the drive box 2. One end of the spring 94 abuts against the limiting ring 93. The tool holder 7 can be limited by the positioning block 6 to prevent the reaming tool 8 from deflecting under force. The positioning disk 92 inserted into the positioning block 6 can limit the tool holder 7 to achieve the effect of clamping and fixing the tool holder 7.

[0034] The drive mechanism 10 includes a support column 101, which is fixedly connected inside the drive housing 2. A worm gear 102 is rotatably connected to the support column 101. A worm 103 is driven to the worm gear 102. A central gear 104 is fixedly connected to the bottom of the worm gear 102. A peripheral gear 105 is meshed with the central gear 104. The transmission cooperation between the worm gear 102 and the worm 103 can provide a locking rotational transmission effect for the central gear 104. The rotation of the peripheral gear 105 driven by the central gear 104 can drive the tool holder 7, which is limited by the transmission rod 91, to rotate.

[0035] A bracket 12 is fixedly connected to the inner wall of the drive box 2. A gear sleeve 13 is rotatably connected to the bracket 12. An outer gear 105 is fixedly connected to the outer surface of the gear sleeve 13. A transmission rod 91 is slidably connected to the inner side of the gear sleeve 13. A groove is provided on the outer surface of the transmission rod 91. A limiting slider is provided on the inner side of the gear sleeve 13 to slide in conjunction with the groove. The sliding cooperation between the limiting slider and the groove allows the transmission rod 91 to achieve the effect of lifting and rotating transmission on the gear sleeve 13, such as a sliding spline structure.

[0036] A pair of brackets 15 are fixedly connected inside the drive box 2. The worm gear 103 is rotatably connected to the pair of brackets 15. A gear pair 16 is provided at one end of the worm gear 103. In this application, the gear pair 16 consists of a pair of meshing bevel gears. One bevel gear is fixed to one end of the worm gear 103, and the other bevel gear is fixed to one end of the drive rod 17. The drive rod 17 is fixedly connected to the gear pair 16. The drive rod 17 is rotatably connected to the cover plate 11. A handle 18 is detachably connected to the top of the drive rod 17. The handle 18 can provide power to drive the worm wheel 102 and the worm gear 103 through the drive rod 17. The handle 18 can be detached in a manner similar to the threaded connection of the handle 14.

[0037] In use, by controlling the drive rod 17 to rotate, the worm gear 103 can drive the worm wheel 102 to rotate. The rotating worm wheel 102 can drive the peripheral gear 105 on the central gear 104 to rotate synchronously at a fixed point. Then, the transmission rod 91 can drive the tool holder 7 inserted on the positioning block 6 to rotate. Therefore, the corresponding reaming cutters 8 on multiple tool holders 7 can be adjusted synchronously to meet the linkage of the reaming diameter adjustment, so as to adapt to the adjustment requirements of the reaming diameter of the cast-in-place pile.

[0038] When it is necessary to replace any of the reamers 8, the corresponding transmission rod 91 can be driven. The transmission rod 91 can then slide on the drive box 2 and the cover plate 11. At the same time, the transmission rod 91 also slides on the gear sleeve 13. At this time, the spring 94 is compressed, and the positioning plate 92 can be disengaged from the positioning block 6. Thus, the tool holder 7 can be removed from the positioning block 6. Similarly, after releasing the transmission rod 91, the positioning plate 92 can be pressed against the tool holder 7, which is limited on the positioning block 6, under the action of the spring 94. This facilitates the quick installation and removal of the reamer 8.

[0039] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A rotary drilling reamer for cast-in-place piles, comprising a connecting shaft (1), characterized in that, The bottom end of the connecting shaft (1) is provided with a drive box (2), the bottom of the drive box (2) is fixedly connected with a base (3), the bottom of the base (3) is fixedly connected with a conical drill bit (4) for rotary drilling of cast-in-place piles, a plurality of rotating disks (5) are rotatably connected to the base (3), each rotating disk (5) is fixedly connected with a positioning block (6), a tool holder (7) is movably connected to the positioning block (6), and a hole-reaming cutter (8) is fixedly connected to the tool holder (7); The drive box (2) is provided with a plurality of transmission connectors (9), which are movably connected to the positioning block (6). The drive box (2) is provided with a drive mechanism (10), which is used to drive the transmission connectors (9) to rotate so as to drive the reaming cutter (8) to achieve angle adjustment.

2. The rotary drilling reamer for cast-in-place piles according to claim 1, characterized in that, The bottom of the drive box (2) is bolted to a cover plate (11), which is fixedly connected to the bottom end of the connecting shaft (1).

3. The rotary drilling reamer for cast-in-place piles according to claim 2, characterized in that, The transmission connector (9) includes a transmission rod (91), which is slidably connected to the drive box (2). A positioning plate (92) is fixedly connected to the bottom end of the transmission rod (91). A limit ring (93) is fixedly connected to the outer surface of the transmission rod (91), and a spring (94) is sleeved on the outer surface of the transmission rod (91).

4. The rotary drilling reamer for cast-in-place piles according to claim 3, characterized in that, The transmission rod (91) is slidably connected to the cover plate (11), and a handle (14) is detachably connected to the top end of the transmission rod (91).

5. A rotary drilling reamer for cast-in-place piles according to claim 3, characterized in that, The tool holder (7) is movably inserted into the positioning block (6), and the positioning disk (92) is movably inserted into the positioning block (6) and abuts against the tool holder (7). The positioning disk (92) is located on the outside of the drive box (2), and the limiting ring (93) is located on the inside of the drive box (2). One end of the spring (94) abuts against the limiting ring (93).

6. A rotary drilling reamer for cast-in-place piles according to claim 5, characterized in that, The drive mechanism (10) includes a support column (101) which is fixedly connected inside the drive box (2). A worm gear (102) is rotatably connected to the support column (101), and a worm (103) is drivenly connected to the worm gear (102). A central gear (104) is fixedly connected to the bottom of the worm gear (102), and a peripheral gear (105) is meshed with the central gear (104).

7. A rotary drilling reamer for cast-in-place piles according to claim 6, characterized in that, A bracket (12) is fixedly connected to the inner wall of the drive box (2). A gear sleeve (13) is rotatably connected to the bracket (12). The peripheral gear (105) is fixedly connected to the outer surface of the gear sleeve (13). The transmission rod (91) is slidably connected to the inner side of the gear sleeve (13). A groove is provided on the outer surface of the transmission rod (91). A limiting slider that slides in cooperation with the groove is provided on the inner side of the gear sleeve (13).

8. A rotary drilling reamer for cast-in-place piles according to claim 7, characterized in that, The drive box (2) is internally fixedly connected to a pair of brackets (15). The worm gear (103) is rotatably connected to the pair of brackets (15). One end of the worm gear (103) is provided with a gear pair (16). A drive rod (17) is fixedly connected to the gear pair (16). The drive rod (17) is rotatably connected to the cover plate (11). A handle (18) is detachably connected to the top end of the drive rod (17).

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