CN219262294U

CN219262294U - Bottom expanding drill bit for building construction

Info

Publication number: CN219262294U
Application number: CN202320067972.7U
Authority: CN
Inventors: 王薇; 王刚; 王卓衡
Original assignee: Zhejiang Dingye Foundation Engineering Co ltd
Current assignee: Zhejiang Dingye Foundation Engineering Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-06-27
Anticipated expiration: 2033-01-10

Abstract

The utility model provides a bottom expanding drill bit for building construction, and belongs to the technical field of building construction equipment. The problem that the hole diameter of the existing bottom-expanded drilling section cannot be accurately constructed is solved. This building construction is with club-footed drill bit, including main shaft, base and club-footed scraper bowl, the base is fixed in the lower extreme of main shaft, and the club-footed scraper bowl interval sets up the outer lane at the base, and the one end of club-footed scraper bowl articulates in the base edge, and the upper and lower both sides symmetry of base terminal surface is fixed with the hydraulic stem, and the tip of hydraulic stem articulates with the outside edge of club-footed scraper bowl, has seted up the spacing groove on the club-footed scraper bowl, is connected with branch between club-footed scraper bowl and the base, and the one end and the base articulated other end of branch locate the spacing inslot through the round pin axle card. According to the utility model, the retraction and the extension of the bottom-enlarging bucket are controlled by the hydraulic rod matched with the supporting rod, and the bottom-enlarging diameter of the bottom-enlarging bucket is adjusted by the extension length of the hydraulic rod, so that the accuracy control of the drill bit in cutting and reaming the hole wall is higher.

Description

Bottom expanding drill bit for building construction

Technical Field

The utility model belongs to the technical field of building construction equipment, and relates to a bottom expanding drill bit for building construction.

Background

In the construction process of the pedestal pile, a pedestal hole is often required to be drilled by adopting a pedestal drill bit, the hole wall is cut at the bottom of the pedestal hole, and a drilling section with larger hole diameter is drilled to realize pedestal expansion. The existing bottom expanding drill bit generally comprises bottom expanding wings, a pressurizing frame, a connecting rod, a base and a pin shaft. Under the action of the pressurizing frame, when the drilling machine rotates, the bottom expanding wings are gradually expanded under the action of the dead weight of the drilling tool, and the hole wall is cut to expand the bottom.

However, under the actual construction environment, the bottom-enlarging drill bit in the prior art, as disclosed in Chinese patent 2004100378045, is designed into a conical shape to enlarge the bottom, so that the bearing capacity of the bottom-enlarging pile is increased, but the diameter of the drill bit which is unfolded under the action of the dead weight of the drilling tool is limited, and meanwhile, the opening degree of the bottom-enlarging wing cannot be accurately controlled, so that the hole diameter of a drilling section which needs to be enlarged cannot be accurately constructed, and the requirement of accurately enlarging the bottom of different foundation holes cannot be met under different conditions.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a bottom expanding drill bit for construction, which can accurately adjust the diameter of the bottom expanding.

The aim of the utility model can be achieved by the following technical scheme: the utility model provides a building construction is with club-footed drill bit, includes main shaft, base and club-footed scraper bowl, the base be fixed in the lower extreme of main shaft, the club-footed scraper bowl interval set up the outer lane at the base, the one end of club-footed scraper bowl articulates in the base edge, the upper and lower both sides symmetry of base terminal surface is fixed with the hydraulic stem, the tip of hydraulic stem articulates with the outside edge of club-footed scraper bowl, the spacing groove has been seted up on the club-footed scraper bowl, be connected with branch between club-footed scraper bowl and the base, the one end and the base articulated other end of branch are located in the spacing groove through the round pin axle card.

The principle of the bottom expanding drill bit for building construction is as follows: the utility model discloses a bottom expanding drill bit, which vertically extends to the bottom along a pile hole to expand the bottom, namely, the diameter of the bottom of the pile is increased, a bottom expanding bucket is in a contracted state when the drill bit extends into the bottom, the bottom expanding bucket is pressed by a hydraulic rod after extending into the bottom, the bottom expanding bucket is gradually expanded outwards in the pressing process due to a hinged structure, and the hole wall is expanded by being matched with the rotation of a main shaft.

In the bottom expanding drill bit for building construction, the bottom surface of the main shaft is provided with the openable bottom plate, and one end of the bottom plate is connected with the other end of the bottom plate through the hinge structure and is provided with the locking device.

In the bottom expanding drill bit for building construction, the bottom plate and the bottom expanding bucket in a contracted state are matched to form a closed structure.

In the bottom expanding drill bit for building construction, the triangular plate is fixed on the base, the tip of the triangular plate is provided with the bending structure matched with the hydraulic rod, and the hinge point of the hydraulic rod penetrates through the bending structure of the triangular plate.

Compared with the prior art, the bottom expanding drill bit for building construction controls the retraction and the extension of the bottom expanding bucket through the hydraulic rod matched with the supporting rod, and adjusts the bottom expanding diameter of the bottom expanding bucket through the extension length of the hydraulic rod, so that the accuracy of the drill bit in cutting and reaming the hole wall is higher.

Drawings

FIG. 1 is a schematic view of the construction of the present reamer;

FIG. 2 is a schematic view of the configuration of the present reamer head when retracted;

FIG. 3 is a schematic view of the configuration of the bottom-expanding drill bit when open;

in the figure, 1, a main shaft; 2. a base; 3. a bottom expanding bucket; 4. a hydraulic rod; 5. a limit groove; 6. a support rod; 7. a pin shaft; 8. a bottom plate; 9. a locking device; 10. triangular plate; 10a, bending structure.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the bottom-enlarging drill for building construction comprises a main shaft 1, a base 2 and bottom-enlarging buckets 3, wherein the base 2 is fixed at the lower end of the main shaft 1, and the bottom-enlarging buckets 3 are arranged on the outer ring of the base 2 at intervals.

The main shaft 1 is driven to rotate by a power machine, and the bottom expanding bucket 3 is used for cutting the pile hole wall.

One end of the bottom expanding bucket 3 is hinged to the edge of the base 2, so that the bottom expanding bucket 3 can rotate in a fixed shaft manner, hydraulic rods 4 are symmetrically fixed on the upper side and the lower side of the end face of the base 2, the end part of each hydraulic rod 4 is hinged to the outer side edge of the bottom expanding bucket 3, the bottom expanding bucket 3 is driven to retract and extend through the extension and retraction of the hydraulic rods 4, a limit groove 5 is formed in the bottom expanding bucket 3, a supporting rod 6 is connected between the bottom expanding bucket 3 and the base 2, one end of the supporting rod 6 is hinged to the other end of the base 2 and is clamped in the limit groove 5 through a pin shaft 7, the supporting rod 6 is used for increasing the firmness of the bottom expanding bucket 3 under the connection structure of the hydraulic rods 4,

further, the bottom surface of the main shaft 1 is provided with a bottom plate 8 which can be opened and closed, one end of the bottom plate 8 is connected with the other end of the bottom plate through a hinge structure, a locking device 9 is arranged at the other end of the bottom plate, sediment cut off from the hole wall is located between the bottom-expanding buckets 3, the sediment is collected through the bottom plate 8, and after the drill rises, the locking device 9 is opened to discharge the sediment inside.

Wherein the bottom plate 8 and the under-reamed bucket 3 in a contracted state cooperate to form a closed structure by which sediment is pressed inward when the under-reamed bucket 3 is contracted, and by which the sediment in the interior can be prevented from falling.

The triangular plate 10 is fixed on the base 2, the tip of the triangular plate 10 is provided with a bending structure 10a matched with the hydraulic rod 4, the hinge point of the hydraulic rod 4 penetrates through the bending structure 10a of the triangular plate 10, the bending structure 10a on the triangular plate 10 is perpendicular to the hydraulic rod 4, and the function of better supporting the end part of the hydraulic rod 4 can be achieved.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Although various terms are used more herein, the use of other terms is not precluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.

Claims

1. The utility model provides a building construction is with club-footed drill bit, includes main shaft (1), base (2) and club-footed scraper bowl (3), base (2) be fixed in the lower extreme of main shaft (1), club-footed scraper bowl (3) interval set up the outer lane at base (2), a serial communication port, the one end of club-footed scraper bowl (3) articulates in base (2) edge, the upper and lower bilateral symmetry of base (2) terminal surface is fixed with hydraulic stem (4), the tip of hydraulic stem (4) articulates with the outside edge of club-footed scraper bowl (3), limit groove (5) have been seted up on club-footed scraper bowl (3), be connected with branch (6) between club-footed scraper bowl (3) and base (2), the one end of branch (6) articulates the other end through round pin axle (7) card and locates in limit groove (5).

2. The bottom expanding drill bit for building construction according to claim 1, wherein a bottom plate (8) capable of being opened and closed is arranged on the bottom surface of the main shaft (1), and one end of the bottom plate (8) is connected with the other end of the bottom plate through a hinge structure, and a locking device (9) is arranged on the other end of the bottom plate.

3. A bottom-expanding drill bit for construction according to claim 2, characterized in that the bottom plate (8) and the bottom-expanding bucket (3) in the contracted state cooperate to form a closed structure.

4. The bottom expanding drill bit for building construction according to claim 1, wherein a triangular plate (10) is fixed on the base (2), the tip of the triangular plate (10) is provided with a bending structure (10 a) matched with a hydraulic rod (4), and a hinge point of the hydraulic rod (4) penetrates through the bending structure (10 a) of the triangular plate (10).