TWI812068B - Simplified electrolysis device - Google Patents

Abstract

The present invention relates to a drill bit for screw pile, the drill bit comprises a shank, a bit body and a connection body. The shank is divided into a core and a surface hardening layer from the interior and the exterior by surface hardening treatment. The hardness of the bit body is greater than the hardened of the surface hardening layer. The connection body is used for connecting between the bit body and the shank. Thereby, when the drill bit is rotated for digging the ground by using the screw pile, the bit body can penetrate various objects in the ground through its own hardness, and the bit body is not easily separated from the shank through the connection body, so that the drill bit of present invention can increase the usage time for digging the ground.

Description

Drill bits for foundation pile excavation

The present invention relates to a drill bit used in construction, particularly a drill bit that can penetrate various foreign objects in the foundation during the excavation process.

Before a construction company builds a large building on a foundation, if the foundation has insufficient ground strength or soft soil, the construction company will drive multiple foundation piles into the interior of the foundation so that the multiple foundation piles can pass through. The hard soil layer of the foundation allows the weight of the building to be transferred to the hard soil layer of the foundation through multiple foundation piles, thereby improving the safety and stability of the building.

Among them, before the construction company drives the foundation piles into the foundation, the construction company will first select a suitable drill bit based on the geological conditions of the foundation, and then rotate the drill bit to excavate the foundation. However, during the process of digging the foundation, the drill bit will Contact with various foreign objects inside the foundation. Once the drill bit comes into contact with foreign objects with higher hardness, the drill bit is easily broken or damaged, which in turn shortens the service life of the drill bit.

The main purpose of the present invention is to improve the structural composition of a drill bit for foundation pile excavation, so that the improved drill bit can rotate and penetrate various foreign objects of different hardness in the foundation during the excavation process, so that the improved drill bit can extend The service life of the excavation foundation.

In order to achieve the above purpose, the drill bit for foundation pile excavation of the present invention is mainly composed of a shank, a drill bit body and a connecting body, which are surface hardened to form a core body and a hardness The surface hardening layer is larger than the core body, and the core body is recessed to form a receiving space, and the surface hardening layer covers the core body, so that the surface hardening layer is located on the periphery of the core body.

In addition, the hardness of the drill bit body is greater than that of the surface hardened layer, and has a penetration part inside the accommodation space and a drilling part outside the accommodation space, wherein the connection body is connected to the shank at the same time. and the penetration part, so that the connecting body can prevent the drill bit body from being separated from the shank.

In a preferred embodiment, the above-mentioned penetration part is formed to extend horizontally along a direction away from the above-mentioned drilled part to present a columnar shape, and the above-mentioned accommodating space is formed to be horizontally recessed to present a columnar shape.

In another preferred embodiment, the penetration portion is tapered and extended in a direction away from the drilled portion to form a truncated cone, and the accommodation space is formed to be tapered and recessed to form a truncated cone. form.

In the two aforementioned embodiments, the drilled part gradually tapers in a direction away from the penetration part to assume a cone shape, so that the end of the drilled part away from the penetration part is set as a tip. Furthermore, The drill bit body is made of carbide, and the connecting body is made of copper.

The characteristic of the present invention is that the inner and outer parts of the shank are respectively set as the core body and the surface hardened layer, and the hardness of the drill bit body is greater than the surface hardened layer, and the drill bit body is connected to the shank through the connecting body, whereby the drill bit rotates During the process of digging the foundation, the drill bit body can not only penetrate various foreign objects in the foundation through its own hardness, but also the drill bit body can not be easily separated from the handle through the connecting body, so that the drill bit of the present invention can extend the service life of the foundation excavation.

1: drill bit

10: handle

11: Surface hardened layer

12:Core body

13: Accommodation space

20: Drill bit body

21:Penetration part

22:Drilling Department

221: Tip

30:Connect the body

Figure 1 is a cross-sectional exploded view of the drill bit of the present invention in the first preferred embodiment; Figure 2 is a cross-sectional view of the drill bit of the present invention in the first preferred embodiment; Figure 3 is a schematic diagram of the drill bit of the present invention digging the foundation in the first preferred embodiment; Figure 4 is a cross-sectional view of the drill bit of the present invention in the second preferred embodiment. Exploded view; and Figure 5 is a cross-sectional view of the drill bit of the present invention in the second preferred embodiment.

In order to facilitate a further clear and detailed understanding of the structure, use and characteristics of the present invention, preferred embodiments are enumerated and detailed descriptions are as follows with reference to the drawings: Please refer to Figures 1 and 2. In the first preferred embodiment, the drill bit 1 for pile excavation of the present invention mainly consists of a shank 10, a drill bit body 20 and a connecting body 30. Among them, the shank 10 has undergone surface hardening treatment, so that the shank 10 A part is hardened to form a surface hardened layer 11, and the remaining part of the handle 10 is set as a core body 12 covered by the surface hardened layer 11, and the surface hardened layer 11 is located on the periphery of the core body 12, where the surface hardened layer The hardness of the layer 11 is greater than that of the core body 12, and the core body 12 is horizontally depressed to form a columnar accommodation space 13.

A part of the drill bit body 20 is located inside the accommodating space 13 of the shank 10 and is configured as a penetration part 21 in a columnar shape, while the remaining part of the drill bit body 20 is located outside the accommodating space 13 and is configured as a penetration part 21 . As shown in FIG. 2 , the drilled portion 22 on one side of the entry portion 21 gradually tapers in a direction away from the penetration portion 21 and assumes a cone shape, so that the drilled portion 22 is further away from the penetration portion 21 . One end forms a tip 221. In addition, the connecting body 30 is located inside the accommodation space 13 of the shank 10, and the connecting body 30 is connected to the shank 10 and the penetration part 21 at the same time, so that the connecting body 30 can be used to prevent the drill bit body 20 Separated from the shank 10 , in this embodiment, the drill bit body 20 is made of carbide, and the connecting body 30 is made of copper.

Please refer to FIG. 3 . When the drill bit 1 of the present invention is actually used, the drill bit 1 of the present invention rotates, and the rotating drill bit 1 gradually approaches the foundation, so that the tip 221 of the drill bit body 20 begins to excavate the foundation, and When the drill bit 1 excavates the foundation, the drill bit body 20 can not only penetrate various foreign objects in the foundation through its own hardness, but the drill bit body 20 can even be difficult to detach from the handle 10 through the connecting body 30, so that the drill bit 1 of the present invention can extend the excavation time. The service life of the foundation.

Please refer to Figures 4 and 5. In the second preferred embodiment, the difference from the first preferred embodiment lies in the shape of the accommodation space 13 of the shank 10 and the penetration portion 21 of the drill bit 1. As for the connection method of the shank 10, the drill body 20 and the connecting body 30, it is the same as the first preferred embodiment, and will not be described again. As shown in the figure, the penetration part 21 is along the direction away from the drilling part 22. It is tapered and extended to form a truncated cone, while the accommodating space 13 is formed to be tapered and recessed to form a truncated cone.

The above embodiments are only for the convenience of illustrating the invention and are not intended to limit the invention. Without departing from the scope of the invention, various simple deformations and modifications made by those skilled in the industry according to the patent scope and novel description of the invention should still be included. Included in the following patent application scope.

1: drill bit

10: handle

11: Surface hardened layer

12:Core body

13: Accommodation space

20: Drill bit body

21:Penetration part

22:Drilling Department

221: Tip

30:Connect the body

Claims (5)

A drill bit for foundation pile excavation, including: a handle, which is surface-hardened to form a core body and a surface-hardened layer with a hardness greater than the core body. The core body is recessed to form an accommodation space, and the surface-hardened layer Covering the core body so that the surface hardening layer is located on the periphery of the core body; a drill bit body having a hardness greater than the surface hardening layer and having a penetrating portion inside the accommodating space and a drill bit inside the accommodating space A drilling part placed outside the space; and a connecting body, connected to the handle and the penetration part at the same time, so that the connecting body can prevent the drill bit body from being separated from the handle. The drill bit for foundation pile excavation according to claim 1, wherein the drilling portion gradually tapers in a direction away from the penetration portion and assumes a cone shape, so that the drilling portion is at one end away from the penetration portion. Set to a tip. The drill bit for foundation pile excavation according to claim 1, wherein the penetration portion extends horizontally in a direction away from the drilled portion to form a columnar shape, and the accommodating space is formed to be horizontally recessed to form a columnar shape. status state. The drill bit for foundation pile excavation according to claim 1, wherein the penetration portion is formed by tapering and extending in a direction away from the drilling portion to present a truncated cone shape, and the accommodation space is formed by a tapering depression. And set it as a truncated cone. The drill bit for foundation pile excavation according to claim 1, wherein the drill bit body is made of carbide, and the connecting body is made of copper.

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