Fixed-length rotary excavating foundation tapper

Abstract

The utility model belongs to the technical field of foundation tapping, and particularly relates to a fixed-length rotary excavating foundation tapper which comprises a quick connector, longitudinal beams, a square box body, cutting teeth, a hydraulic motor, a rotating shaft, a drill rod, drill teeth, a spiral blade and a sweeping plate, the quick connector is used for being connected with a small arm of an excavator, and the longitudinal beams are fixedly arranged at the four corners of the lower surface of the quick connector respectively. The square box is arranged among the four longitudinal beams, cutting teeth are arranged on the four edges of the bottom end of the square box, the hydraulic motor is installed in the quick connector, the top end of the rotating shaft is connected to an output shaft of the hydraulic motor, the drill rod is arranged at the bottom end of the rotating shaft, the drill teeth are arranged on the lower surface of the drill rod, and the spiral blade is installed outside the rotating shaft. A gap used for dumping soil is formed between the quick connector and the square box body, and the sweeping plate is arranged at the top end of the spiral blade and located in the gap. The device has the advantages of being simple in structure, convenient to disassemble and assemble, convenient and fast to construct and high in hole forming speed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation hole opening; in particular, the utility model relates to a fixed-length rotary drilling foundation hole opener. Background Art

[0002] With the continuous development of the global economy, people's travel requirements are gradually increasing. High-speed rail is an important means of transportation that people prefer. High-speed rail, with its fast speeds, large transport capacity, high safety and protection, and environmental friendliness, is a vital component of the modern transportation system. However, the high speeds of high-speed rail also place higher demands on safety and protection. To prevent people and animals from straying onto railway lines, reduce accidents, and ensure the safety and smoothness of rail transportation, high-speed rail protective fences have emerged.

[0003] The construction of the protective fence foundation is one of the most important factors in ensuring the quality of the protective fence construction. Traditional construction methods rely on manual digging, which is labor-intensive and inefficient. The use of traditional excavator buckets causes significant soil disturbance and over-excavation, resulting in increased concrete foundation backfill volume and unreliable costs. Utility Model Content

[0004] In view of this, the present invention provides a fixed-length rotary drilling foundation hole opener, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above-mentioned objectives, the utility model provides a fixed-length rotary drilling foundation hole opener, including a quick-connect joint, a longitudinal beam, a square box, cutting teeth, a hydraulic motor, a rotating shaft, a drill rod, drill teeth, spiral blades and a sweeping plate. The quick-connect joint is used to connect the forearm of the excavator, and the longitudinal beam is fixedly provided with one at each of the four corners of the lower surface of the quick-connect joint. The square box is arranged between the four longitudinal beams, and the four sides of the bottom end of the square box are provided with cutting teeth. The hydraulic motor is installed in the quick-connect joint, and the top end of the rotating shaft is connected to the output shaft of the hydraulic motor. The drill rod is arranged at the bottom end of the rotating shaft, the drill teeth are arranged on the lower surface of the drill rod, and the spiral blades are installed outside the rotating shaft. A gap for discharging soil is provided between the quick-connect joint and the square box, and the sweeping plate is arranged at the top end of the spiral blade, and the sweeping plate is located in the gap.

[0006] In a fixed-size rotary drilling basic hole opener as described above, optionally, arc-shaped plates are fixedly provided at the four corners of the inner cavity of the square box, and the four arc-shaped plates circumferentially form a cylindrical cavity, and the circular cavity is adapted to the spiral blade. The bottom end of the arc-shaped plate is provided with a guide bevel, and the bottom end of the spiral blade is located within the range of the guide bevel.

[0007] In a fixed-length rotary drilling basic hole opener as described above, optionally, four drill rods are provided, the lower surfaces of the four drill rods are provided with drill teeth, and the drill teeth of the four drill rods are distributed alternately in radial direction, and one of the drill rods is parallel to and fixedly connected to the bottom edge of the spiral blade.

[0008] In the fixed-length rotary drilling basic hole opener as described above, optionally, the bottom of the sweeping plate is parallel to and fixedly connected to the edge of the top end of the spiral blade.

[0009] In a fixed-length rotary drilling basic hole opener as described above, optionally, the longitudinal beam includes an upper beam body and a lower beam body distributed up and down, the upper beam body is a columnar structure, the lower beam body is a square tube structure, the square box body is slidably installed between the four lower beam bodies, and a spring is provided on the quick-connect joint, the bottom end of the spring is connected to the square box body, and the spring is compressed when the square box body moves upward, and when the square box body is in the highest position, the bottom end height of its drill teeth is the same as the height of the top of the drill rod.

[0010] In a fixed-size rotary drilling basic hole opener as described above, optionally, the top of the square box is fixedly connected to a sliding sleeve, the top of the sliding sleeve is fixedly connected to a guide rod, the four corners of the top surface of the quick-connect joint are fixedly connected to a connecting plate, the top of the guide rod passes through the connecting plate, and the spring is arranged between the sliding sleeve and the connecting plate.

[0011] In a fixed-size rotary drilling basic hole opener as described above, optionally, a rotating sleeve is provided in the sliding sleeve, a spiral groove is provided on the surface of the rotating sleeve, the top and bottom ends of the spiral groove are connected by a longitudinal groove, a sliding body capable of displacing in the spiral groove and the longitudinal groove is fixedly provided on the inner surface of the sliding sleeve, and a drive assembly is provided between the rotating sleeve and the output shaft of the hydraulic motor.

[0012] In a fixed-size rotary drilling basic hole opener as described above, optionally, the side surface of the longitudinal groove located at the rear in the rotation direction of the rotating sleeve is an inclined surface with the bottom end tilted backward, and the side surface of the longitudinal groove located at the front in the rotation direction of the rotating sleeve is a longitudinal surface.

[0013] In a fixed-size rotary drilling basic hole opener as described above, optionally, the driving assembly includes a gear, a gear ring and a bracket, the gear is fixedly sleeved on the top of the rotating sleeve, the bracket is fixedly sleeved on the output shaft of the hydraulic motor, the gear ring is fixedly set on the bracket, and the gear is meshed with the gear ring.

[0014] In a fixed-size rotary drilling basic hole opener as described above, optionally, the top of the sweeping plate is fixed to the bracket, and an arc-shaped sleeve plate is provided on the side of the sliding sleeve facing the center of the rotating shaft, the bottom end of the sleeve plate is fixed to the square box, and the sleeve plate blocks the inner side of the rotating sleeve.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This device is connected to the excavator through a quick-connect joint. The hydraulic pump drives the drill rod to drive the drill teeth to loosen the soil. During the rotation, the spiral blades discharge the soil outward. The square box is driven downward by the excavator to form the foundation to a fixed size.

[0017] 2. This device has a simple structure, is easy to assemble and disassemble, is convenient to construct, and has a fast hole-making speed, which can effectively save construction time.

[0018] 3. This device can reduce the disturbance to the construction soil by excavating in a fixed shape and size, and reduce the amount of concrete used for over-excavation and backfill, thereby achieving the goal of improving construction quality and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the fixed-length rotary drilling foundation hole opener of the utility model.

[0021] Figure 2 For this utility model Figure 1 A in the enlarged view.

[0022] Figure 3 This is another perspective view of the fixed-length rotary drilling foundation hole opener of the utility model.

[0023] Figure 4 For this utility model Figure 3 A local schematic diagram of .

[0024] Figure 5 For this utility model Figure 1 The schematic diagram of the square box is hidden in the figure.

[0025] Figure 6 This is a schematic diagram of the square box of the fixed-length rotary drilling foundation hole opener of the present invention.

[0026] Figure 7 This is a schematic diagram of the disassembled sliding sleeve and rotating sleeve of the fixed-length rotary drilling foundation hole opener of the utility model.

[0027] Figure 8 For the utility model Figure 7 Another perspective of the picture.

[0028] Figure 9 For this utility model Figure 8 Enlarged view of point B in .

[0029] Figure numerals: quick connector 1, longitudinal beam 2, upper beam body 2.1, lower beam body 2.2, square box body 3, cutting teeth 4, hydraulic motor 5, rotating shaft 6, drill rod 7, drill teeth 8, spiral blade 9, sweep plate 10, gap 11, arc plate 12, guide bevel 13, spring 14, sliding sleeve 15, guide rod 16, connecting plate 17, rotating sleeve 18, spiral groove 19, longitudinal groove 20, sliding body 21, gear 22, gear ring 23, bracket 24, sleeve plate 25. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 9 As shown, a typical embodiment of the present invention provides a fixed-length rotary drilling foundation hole opener, including a quick-connect joint 1, a longitudinal beam 2, a square box 3, cutting teeth 4, a hydraulic motor 5, a rotating shaft 6, a drill rod 7, drill teeth 8, a spiral blade 9 and a sweeping plate 10. The quick-connect joint 1 is used to connect the forearm of the excavator, and the longitudinal beam 2 is fixedly provided with one at each of the four corners of the lower surface of the quick-connect joint 1. The square box 3 is arranged between the four longitudinal beams 2. The four sides of the bottom end of the square box 3 are provided with cutting teeth 4. The hydraulic motor 5 is installed in the quick-connect joint 1, and the top end of the rotating shaft 6 is connected to the output shaft of the hydraulic motor 5. The drill rod 7 is arranged at the bottom end of the rotating shaft 6, the drill teeth 8 are arranged on the lower surface of the drill rod 7, and the spiral blade 9 is installed outside the rotating shaft 6. A gap 11 for discharging soil is provided between the quick-connect joint 1 and the square box 3, and the sweeping plate 10 is arranged at the top end of the spiral blade 9, and the sweeping plate 10 is located in the gap 11.

[0032] By operating the excavator, the hole opener is inserted into the soil. During the insertion process, the hydraulic motor 5 drives the drill rod 7 to rotate through the rotating shaft 6 to loosen the soil. The spiral blade 9 transports the soil upward. After the soil is transported to the gap 11, the sweeping plate 10 throws the soil out. In the process of inserting the square box 3 into the soil, a square fixed-size hole is formed.

[0033] Arc plates 12 are fixedly installed at the four corners of the inner cavity of the square box 3. The four arc plates 12 form a cylindrical cavity in the circumferential direction. The circular cavity is adapted to the spiral blade 9. A guide slope 13 is provided at the bottom end of the arc plate 12, and the bottom end of the spiral blade 9 is located within the range of the guide slope 13.

[0034] The inner cavity of the square cavity is formed into a cylindrical cavity by the arc plate 12 to better cooperate with the spiral blade 9 and improve the efficiency of the spiral blade 9 in conveying soil upward. When the square box 3 cuts the soil, the guide slope 13 pushes the soil toward the center of the bottom of the cylindrical cavity, improving the efficiency of the soil conveyed by the spiral blade 9 and improving the soil discharge efficiency.

[0035] Four drill rods 7 are provided, each with drill teeth 8 disposed on its lower surface. The four drill rods 7 are staggered radially along the drill teeth 8, with one drill rod 7 parallel to and affixed to the bottom edge of the spiral blade 9. This arrangement effectively supports the spiral blade 9 using the four drill rods 7, thereby improving the stability and verticality of the hole opener as it is inserted into the soil. Furthermore, the distribution of the drill teeth 8 more comprehensively loosens the soil within the area covered by the drill rods 7, reducing soil resistance encountered by the drill rod 7 during downward movement.

[0036] The bottom of the sweeping plate 10 is parallel to and fixed to the edge of the top of the spiral blade 9. This arrangement allows the soil to be swept away by the sweeping plate 10 after being pushed out from the top of the spiral blade 9. The sweeping plate 10 rotates synchronously with the spiral blade 9, achieving the effect of timely soil discharge, thereby improving soil discharge efficiency.

[0037] The longitudinal beam 2 includes an upper beam body 2.1 and a lower beam body 2.2 distributed in the upper and lower parts. The upper beam body 2.1 is a columnar structure, and the lower beam body 2.2 is a square tube structure. The square box body 3 is slidably installed between the four lower beam bodies 2.2. A spring 14 is provided on the quick-connect joint 1. The bottom end of the spring 14 is connected to the square box body 3. When the square box body 3 moves upward, the spring 14 is compressed, and when the square box body 3 is in the highest position, the bottom end height of its drill teeth 8 is the same as the height of the top of the drill rod 7.

[0038] In the initial state, the elastic force of the spring 14 and the deadweight of the square box 3 cause the square box 3 to be at the lowest position on the lower beam 2.2. At this point, the bottom ends of the cutting teeth 4 and the bottom ends of the drilling teeth 8 are at the same height. The elastic force provides a certain buffering force for the square box 3. At the same time, during the insertion of the square box 3 into the soil, the upward displacement of the square box 3 compresses the spring 14, causing the drilling teeth 8 to preferentially loosen the soil below the square box 3. After the square box 3 is inserted into the soil under the action of the spring 14, it is inserted into the soil. This reduces the pressure on the square box 3 during forced insertion into the soil, better preventing deformation.

[0039] The top of the square box 3 is fixedly connected to a sliding sleeve 15, the top of the sliding sleeve 15 is fixedly connected to a guide rod 16, the four corners of the top surface of the quick-connect joint 1 are fixedly connected to a connecting plate 17, the top of the guide rod 16 passes through the connecting plate 17, and the spring 14 is arranged between the sliding sleeve 15 and the connecting plate 17.

[0040] The sliding sleeve 15 slides up and down outside the upper beam 2.1, allowing the square box 3 to move up and down stably. The guide rod 16 cooperates with the connecting plate 17 to guide the displacement of the sliding sleeve 15 and improve stability.

[0041] A rotating sleeve 18 is provided inside the sliding sleeve 15, and a spiral groove 19 is provided on the surface of the rotating sleeve 18. The top and bottom ends of the spiral groove 19 are connected by a longitudinal groove 20. A sliding body 21 capable of displacing in the spiral groove 19 and the longitudinal groove 20 is fixedly provided on the inner surface of the sliding sleeve 15, and a driving assembly is provided between the rotating sleeve 18 and the output shaft of the hydraulic motor 5.

[0042] During the rotation of the rotating shaft 6, the driving assembly drives the rotating sleeve 18 to rotate. During this process, the slide moves from the bottom end to the top end in the spiral groove 19. After that, the slide 21 enters the longitudinal groove 20 from the top end. Under the elastic force of the spring 14, the slide 21 moves quickly from the top end to the bottom end of the longitudinal groove 20 to achieve the reset of the slide 21. During this process, the cutting teeth 4 are inserted into the soil.

[0043] As the slide 21 moves from the bottom to the top of the spiral groove 19, the square box 3 moves upward via the sliding sleeve 15. At this point, the excavator's pressure is transmitted to the drill teeth 8, providing a stable pressure for the drill teeth 8 to dig the soil downward. Before the square box 3 descends, the soil beneath it has already been loosened.

[0044] The side surface of the longitudinal groove 20 located at the rear in the rotation direction of the rotating sleeve 18 is an inclined surface with the bottom end tilted backward, and the side surface of the longitudinal groove 20 located at the front in the rotation direction of the rotating sleeve 18 is a longitudinal surface.

[0045] Such arrangement enables, when the square box body 3 cannot be quickly reset downward due to soil resistance, the rear side surface of the longitudinal groove 20 is used to apply force to the sliding body 21, so that the square box body 3 can be forced downward, achieving a stable soil cutting effect.

[0046] The drive assembly includes a gear 22, a gear ring 23, and a bracket 24. Gear 22 is fixedly mounted on the top of rotating sleeve 18, and bracket 24 is fixedly mounted on the output shaft of hydraulic motor 5. Gear ring 23 is fixedly mounted on bracket 24, and gear 22 and gear ring 23 are meshed. During the rotation of rotating shaft 6, bracket 24 drives the four rotating sleeves 18 to rotate synchronously through gear ring 23, ensuring that square box 3 is stably inserted into the soil and maintains good verticality.

[0047] The top of the sweeping plate 10 is fixedly connected to the bracket 24. An arc-shaped sleeve 25 is provided on the side of the sliding sleeve 15 facing the center of the rotating shaft 6. The bottom end of the sleeve 25 is fixed to the square box 3, and the sleeve 25 blocks the inner side of the rotating sleeve 18. The sleeve 25 can prevent soil thrown out of the gap 11 from entering the spiral groove 19 and the longitudinal groove 20.

[0048] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above implementation without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A fixed-length rotary drilling foundation hole opener, characterized in that: The invention comprises a quick-connect joint (1), a longitudinal beam (2), a square box (3), cutting teeth (4), a hydraulic motor (5), a rotating shaft (6), a drill rod (7), a drill tooth (8), a spiral blade (9) and a sweep plate (10), wherein the quick-connect joint (1) is used to connect the small arm of the excavator, the longitudinal beam (2) is fixedly provided with one at each of the four corners of the lower surface of the quick-connect joint (1), the square box (3) is provided between the four longitudinal beams (2), the four sides of the bottom end of the square box (3) are provided with cutting teeth (4), the hydraulic motor The machine (5) is installed in the quick-connect joint (1), the top end of the rotating shaft (6) is connected to the output shaft of the hydraulic motor (5), the drill rod (7) is arranged at the bottom end of the rotating shaft (6), the drill teeth (8) are arranged on the lower surface of the drill rod (7), the spiral blade (9) is installed outside the rotating shaft (6), a gap (11) for discharging soil is provided between the quick-connect joint (1) and the square box (3), and the sweeping plate (10) is provided at the top end of the spiral blade (9), and the sweeping plate (10) is located in the gap (11).

2. A fixed-length rotary drilling foundation hole opener according to claim 1, characterized in that: Arc plates (12) are fixedly provided at the four corners of the inner cavity of the square box (3), and the four arc plates (12) circumferentially form a cylindrical cavity, and the cylindrical cavity is adapted to the spiral blade (9). The bottom end of the arc plate (12) is provided with a guide bevel (13), and the bottom end of the spiral blade (9) is located within the range of the guide bevel (13).

3. The fixed-length rotary drilling foundation hole opener according to claim 1, characterized in that: Four drill rods (7) are provided, and drill teeth (8) are provided on the lower surfaces of the four drill rods (7). The drill teeth (8) of the four drill rods (7) are radially staggered in sequence, and one of the drill rods (7) is parallel to and fixedly connected to the bottom edge of the spiral blade (9).

4. The fixed-length rotary drilling foundation hole opener according to claim 1, characterized in that: The bottom of the sweeping plate (10) is parallel to and fixedly connected to the edge of the top end of the spiral blade (9).

5. The fixed-length rotary drilling foundation hole opener according to claim 1, characterized in that: The longitudinal beam (2) comprises an upper beam body (2.1) and a lower beam body (2.2) distributed in an upper and lower manner, the upper beam body (2.1) being a columnar structure, the lower beam body (2.2) being a square tube structure, the square box body (3) being slidably mounted between the four lower beam bodies (2.2), a spring (14) being provided on the quick-connect joint (1), the bottom end of the spring (14) being connected to the square box body (3), the spring (14) being compressed when the square box body (3) is displaced upward, and when the square box body (3) is at the highest position, the bottom end height of the drill teeth (8) thereof is the same as the height of the top of the drill rod (7).

6. A fixed-length rotary drilling foundation hole opener according to claim 5, characterized in that: The top of the square box (3) is fixedly connected to a sliding sleeve (15), the top of the sliding sleeve (15) is fixedly connected to a guide rod (16), the four corners of the top surface of the quick-connect joint (1) are fixedly connected to a connecting plate (17), the top of the guide rod (16) passes through the connecting plate (17), and the spring (14) is arranged between the sliding sleeve (15) and the connecting plate (17).

7. A fixed-length rotary drilling foundation hole opener according to claim 6, characterized in that: A rotating sleeve (18) is provided inside the sliding sleeve (15), a spiral groove (19) is provided on the surface of the rotating sleeve (18), the top and bottom ends of the spiral groove (19) are connected via a longitudinal groove (20), a sliding body (21) capable of displacement in the spiral groove (19) and the longitudinal groove (20) is fixedly provided on the inner surface of the sliding sleeve (15), and a driving assembly is provided between the rotating sleeve (18) and the output shaft of the hydraulic motor (5).

8. The fixed-length rotary drilling foundation hole opener according to claim 7, characterized in that: The side surface of the longitudinal groove (20) located at the rear in the rotation direction of the rotating sleeve (18) is an inclined surface with the bottom end tilted backward, and the side surface of the longitudinal groove (20) located at the front in the rotation direction of the rotating sleeve (18) is a longitudinal surface.

9. The fixed-length rotary drilling foundation hole opener according to claim 7, characterized in that: The driving assembly comprises a gear (22), a gear ring (23) and a bracket (24), wherein the gear (22) is fixedly sleeved on the top of the rotating sleeve (18), the bracket (24) is fixedly sleeved on the output shaft of the hydraulic motor (5), the gear ring (23) is fixedly arranged on the bracket (24), and the gear (22) is meshed with the gear ring (23).

10. The fixed-length rotary drilling foundation hole opener according to claim 8, characterized in that: The top end of the sweeping plate (10) is fixedly connected to the bracket (24); a side of the sliding sleeve (15) facing the center of the rotating shaft (6) is provided with an arc-shaped sleeve plate (25); the bottom end of the sleeve plate (25) is fixed to the square box (3), and the sleeve plate (25) blocks the inner side surface of the rotating sleeve (18).

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