Spiral square hole drill bit special for excavator

Abstract

The utility model relates to a special spiral square hole drill bit for excavator, which comprises a drill bit main body and a feeding device, the drill bit main body comprises a square hole frame body, a double-end single-screw straight-screw spiral bucket and a built-in driving buffer system, the square hole frame body is arranged on the inner side of the drill bit main body, the built-in driving buffer system is arranged inside the square hole frame body, and the feeding device is arranged on the drill bit main body. The double-head single-screw straight-screw spiral hopper is fixedly connected to the end of the built-in driving buffering system, the feeding device is arranged on the right side of the drill bit body, the built-in driving buffering system comprises a buffering device and a built-in drilling bucket driver, the buffering device is arranged in the square hole frame body, and the built-in drilling bucket driver is arranged in the square hole frame body. The built-in drill bit driver is arranged in the drill bit body and is close to one side of the buffer device, and a limiting mechanism is arranged on the outer side of the guide rod. By applying repeated impact load to the frame body, the hole forming efficiency is improved, under the alternating frequency load, the hole forming quality is higher, meanwhile, construction can be conducted in a harder stratum, and the service life is longer than that of an ordinary square hole drill bit.

Description

Technical Field

[0001] The utility model relates to the technical field of accessories, in particular to a spiral square hole drill bit special for an excavator. Background Art

[0002] The excavator drill bit is an important accessory of the excavator, which is mainly used for drilling holes and loosening soil in excavation work. The drill bit is usually made of different types of alloys and steel. The drilling depth and the diameter of the hole depend on the size and shape of the drill bit. At present, the drilling rigs used for concrete piles are all used to drill a round hole, and a small number of square pile accessories are also planed and milled by large milling machines. The construction cost is extremely high, which is not conducive to the promotion of this product. With the current urban reconstruction and the improvement of night lighting projects; the demand for the installation of street lights is increasing, and the demand for this low-cost square hole forming machine is increasing.

[0003] When the excavator is drilling a hole, most of the square pile hole accessories used on the construction site are used in conjunction with the excavator. The power of the excavator is used to press the frame directly into the soil, which can easily damage the frame, thereby requiring the frame to be repaired or replaced, which will increase costs and reduce work efficiency. Therefore, a spiral square hole drill bit specially designed for excavators is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a spiral square hole drill bit specially designed for excavators, which has the advantages of reducing costs and improving work efficiency, and solves the problem that the drill bit frame on the market is easily damaged and needs to be repaired or replaced, thereby increasing costs.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spiral square hole drill bit specially used for excavators, comprising a drill bit body and a feeding device, wherein the drill bit body comprises a square hole frame, a double-headed single-screw straight-screw spiral bucket and a built-in drive buffer system, the square hole frame is arranged on the inner side of the drill bit body, the built-in drive buffer system is arranged inside the square hole frame, the double-headed single-screw straight-screw spiral bucket is fixedly connected to the end of the built-in drive buffer system, and the feeding device is arranged on the right side of the drill bit body.

[0006] Furthermore, the built-in drive buffer system includes a buffer device and a built-in drill bucket driver. The buffer device is arranged inside the square hole frame, and the built-in drill bucket driver is arranged inside the drill body and close to one side of the buffer device.

[0007] Furthermore, the buffer device includes a floating base plate, a guide rod, a buffer spring and a locking nut. The floating base plate is arranged inside the square hole frame, the guide rod is fixedly connected to the right side of the floating base plate, the buffer spring is sleeved on the outer surface of the guide rod, and the locking nut is arranged on the outer surface of the guide rod.

[0008] Furthermore, the built-in drill bucket driver is fixedly connected to the right side of the floating bottom plate, the guide rods are four in number and symmetrically distributed, the two guide rods are located above and below the built-in drill bucket driver, and the outer surface of the floating bottom plate is in contact with the inner wall of the square hole frame.

[0009] Furthermore, the square hole frame is square and fits the size of the square pile for drilling, the tail of the square hole frame is set to be serrated, the two ends of the buffer spring are respectively fitted with the right side of the floating bottom plate and the right side of the inside of the drill body, and the square hole frame is fixedly connected to the left side of the feeding device.

[0010] Furthermore, the four guide rods are extended to the outside of the drill bit body, the double-headed single-screw straight-screw spiral bucket is fixedly connected to the left side of the floating bottom plate, the double-headed single-screw straight-screw spiral bucket extends to the outside of the drill bit body, and a movable opening is opened on the left side of the drill bit body.

[0011] Furthermore, a limiting mechanism is arranged on the outer side of the guide rod, and the number of the buffer springs and the locking nuts are both four and symmetrically distributed.

[0012] Furthermore, the four locking nuts are all located at the end of the guide rod and close to the buffer spring, and the floating bottom plate is square in shape.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] The spiral square hole drill bit specially designed for excavators improves the hole-making efficiency by applying repeated impact loads to the frame. Under alternating frequency loads, the hole-making quality is better and construction can be carried out in harder strata. It has a longer service life than conventional square hole drill bits and reduces maintenance costs. With the market share of excavators, a spiral square hole drill bit suitable for excavators has been developed, which greatly reduces the equipment procurement cost and accelerates the advancement of the construction method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the drill bit body of the utility model;

[0016] Figure 2 This is a cross-sectional view of the square hole frame of the utility model structure;

[0017] Figure 3 This is a front view of the square hole frame of the utility model structure;

[0018] Figure 4 This is a disassembled diagram of the drill bit body components of the utility model structure.

[0019] In the figure: 1 drill body, 2 feed device, 3 square hole frame, 4 double-headed single-screw straight-screw spiral bucket, 5 built-in drive buffer system, 6 buffer device, 7 built-in drill bucket driver, 8 floating bottom plate, 9 guide rod, 10 buffer spring, 11 locking nut. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 In this embodiment, a special spiral square hole drill for excavators includes a drill body 1 and a feeding device 2. The drill body 1 includes a square hole frame 3, a double-headed single-screw straight screw spiral bucket 4 and a built-in driving buffer system 5. The square hole frame 3 is arranged on the inner side of the drill body 1. By applying repeated impact loads to the square hole frame 3, the speed of hole forming is greatly improved while ensuring the strength of the square hole frame 3, and the frame itself is protected. The built-in driving buffer system 5 is arranged inside the square hole frame 3. The built-in driving buffer system 5 mainly plays two roles. One is to The straight-screw spiral bucket 4 applies torque, and secondly, in the process of the square hole frame 3 repeatedly impacting and feeding the soil, the double-headed single-screw straight-screw spiral bucket 4 and the built-in drive buffer system 5 are buffered to avoid damage; the double-headed single-screw straight-screw spiral bucket 4 is fixedly connected to the end of the built-in drive buffer system 5, the double-headed single-screw straight-screw spiral bucket 4 is evenly stressed, and the double-headed single-screw has good sealing and firmness in the connection structure, can withstand large tensile and shear forces, is easy to install and disassemble, and thus convenient for maintenance; the feeding device 2 is arranged on the right side of the drill body 1, which is similar to a traditional breaker.

[0022] Among them, the built-in drive buffer system 5 includes a buffer device 6 and a built-in drill bucket driver 7. The buffer device 6 is arranged inside the square hole frame 3. Since the drill body 1 is under a long-term cross-frequency load, the drive system is easily damaged, so a buffer device 6 is installed therein, and the built-in drill bucket driver 7 is arranged inside the drill body 1 and close to the side of the buffer device 6; the buffer device 6 includes a floating bottom plate 8, a guide rod 9, a buffer spring 10 and a locking nut 11. The floating bottom plate 8 is arranged inside the square hole frame 3, and the guide rod 9 is fixedly connected to the right side of the floating bottom plate 8. The buffer spring 10 is sleeved on the outer surface of the guide rod 9. Under the action of the cross-frequency load, the impact force is released by the buffer spring 10 to reduce the harm of the cross-frequency load to the drive system; the locking nut 11 is arranged on the outer surface of the guide rod 9. During the construction process, when the feeding device 2 outputs up and down impacts to the square hole frame 3, the buffer spring 10 can effectively absorb the up and down impact force output by the feeding device 2 along the guide rod 9.

[0023] In addition, the built-in drill bucket driver 7 is fixedly connected to the right side of the floating bottom plate 8. There are four guide rods 9, which are symmetrically distributed. The two guide rods 9 are located above and below the built-in drill bucket driver 7. The outer surface of the floating bottom plate 8 fits the inner wall of the square hole frame 3; the square hole frame 3 is square and fits the size of the square pile to be drilled. The tail of the square hole frame 3 is set to a serrated shape to facilitate feeding soil when drilling. The two ends of the buffer spring 10 are respectively fitted with the right side of the floating bottom plate 8 and the right side of the inside of the drill body 1. The square hole frame 3 is fixedly connected to the left side of the feeding device 2; the four guide rods 9 extend To the outside of the drill bit body 1, the double-headed single-screw straight-screw spiral bucket 4 is fixedly connected to the left side of the floating bottom plate 8, and the double-headed single-screw straight-screw spiral bucket 4 extends to the outside of the drill bit body 1, and a movable opening is opened on the left side of the drill bit body 1; a limiting mechanism is arranged on the outside of the guide rod 9, which can effectively prevent the buffer spring 10 from being compressed and damaged, and ensure that the buffer spring 10 operates within its optimal compression range; the number of buffer springs 10 and locking nuts 11 are both four, and they are symmetrically distributed; the four locking nuts 11 are all located at the ends of the guide rod 9 and close to the buffer spring 10, and the floating bottom plate 8 is square in shape.

[0024] The working principle of the above embodiment is:

[0025] During normal operation, the excavator-specific spiral square hole drill bit first provides torque to the double-headed single-screw straight-screw spiral bucket 4 through the built-in drive buffer system 5, allowing it to drill the soil first and make a round hole on the ground; then, the feeding device 2 is operated to apply repeated impact feeding force to the square hole frame 3 to remove the remaining soil around the round hole, so as to achieve the purpose of drilling the square hole.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spiral square hole drill bit for excavators, comprising a drill bit body (1) and a feeding device (2), characterized in that: The drill bit body (1) comprises a square hole frame (3), a double-headed single-screw straight screw spiral bucket (4) and a built-in drive buffer system (5); the square hole frame (3) is arranged on the inner side of the drill bit body (1); the built-in drive buffer system (5) is arranged inside the square hole frame (3); the double-headed single-screw straight screw spiral bucket (4) is fixedly connected to the end of the built-in drive buffer system (5); and the feeding device (2) is arranged on the right side of the drill bit body (1).

2. The spiral square hole drill bit for excavators according to claim 1, characterized in that: The built-in drive buffer system (5) comprises a buffer device (6) and a built-in drill bucket driver (7); the buffer device (6) is arranged inside the square hole frame (3); and the built-in drill bucket driver (7) is arranged inside the drill head body (1) and close to one side of the buffer device (6).

3. The spiral square hole drill bit for excavators according to claim 2, characterized in that: The buffer device (6) comprises a floating base plate (8), a guide rod (9), a buffer spring (10) and a locking nut (11); the floating base plate (8) is arranged inside the square hole frame (3); the guide rod (9) is fixedly connected to the right side of the floating base plate (8); the buffer spring (10) is sleeved on the outer surface of the guide rod (9); and the locking nut (11) is arranged on the outer surface of the guide rod (9).

4. The spiral square hole drill bit for excavators according to claim 3, characterized in that: The built-in drill bucket driver (7) is fixedly connected to the right side of the floating bottom plate (8), the number of the guide rods (9) is four and they are symmetrically distributed, the two guide rods (9) are located above and below the built-in drill bucket driver (7), and the outer surface of the floating bottom plate (8) is in contact with the inner wall of the square hole frame (3).

5. The spiral square hole drill bit for excavators according to claim 3, characterized in that: The square hole frame (3) is square in shape and fits the size of the square pile for drilling. The tail of the square hole frame (3) is arranged in a sawtooth shape. The two ends of the buffer spring (10) fit the right side of the floating bottom plate (8) and the right side of the inside of the drill bit body (1) respectively. The square hole frame (3) is fixedly connected to the left side of the feeding device (2).

6. The spiral square hole drill bit for excavators according to claim 3, characterized in that: The four guide rods (9) all extend to the outside of the drill bit body (1), the double-headed single-screw straight-screw spiral bucket (4) is fixedly connected to the left side of the floating bottom plate (8), the double-headed single-screw straight-screw spiral bucket (4) extends to the outside of the drill bit body (1), and a movable opening is opened on the left side of the drill bit body (1).

7. The spiral square hole drill bit for excavators according to claim 3, characterized in that: A limiting mechanism is arranged on the outer side of the guide rod (9), and the number of the buffer spring (10) and the locking nut (11) are both four and symmetrically distributed.

8. The spiral square hole drill bit for excavators according to claim 3, characterized in that: The four locking nuts (11) are all located at the ends of the guide rod (9) and are close to the buffer spring (10), and the floating bottom plate (8) is square in shape.

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