Diameter-variable reamer bit

Abstract

The utility model relates to the field of drill bits, in particular to a variable-diameter reamer bit which comprises a drill rod and a sliding plate, a drill bit body is installed on the lower end face of the drill rod, a cavity is formed in the drill rod, the sliding plate and the cavity are arranged in a sliding mode, a driving block is arranged on the sliding plate in a sliding mode, and an adjusting assembly is arranged between the driving block and the drill rod. In the working process, the driving rod component, the driving block component and the sliding plate component are matched with one another, the driving rod component is adjusted to rotate, the driving rod pushes the driving block to move, the sliding plate moves towards one end under the operation action of the first inclined face and the second inclined face, and one end of the first reaming cutter is driven to move along with the sliding plate. The first reaming cutter is adjusted to be eccentrically arranged, the application range of the device is widened, meanwhile, cuttings move in the direction away from the center, the cuttings are prevented from being accumulated around, and the problems of abrasion and machining precision reduction caused by cuttings blockage are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a variable diameter hole enlarging drill bit. Background Art

[0002] Variable diameter drill bits play an important role in modern drilling projects. They can adapt to different formation conditions and drilling requirements, and improve drilling efficiency and quality. Currently, common variable diameter drill bit structures include sliding, telescopic, and folding types.

[0003] After searching, it was found that a Chinese patent with publication number CN214196191 U discloses a variable diameter drill bit, wherein a plurality of first reaming blades are fixedly connected to the reaming rod, a connecting shaft is hinged on the reaming rod, a plurality of limit grooves are opened on the side wall of the drill rod, a pin rod is fixedly connected between the inner walls of the upper ends of the limit grooves, and the connecting shaft is rotatably set on the pin rod; compared with the existing technology, the drill bit can be retracted by the connecting block when encountering rocks during drilling, driving the reaming rod to move outward, thereby increasing the diameter of the drill hole and avoiding the problem of the drill bit being stuck. Forcibly pulling it away can easily cause the drill bit to be damaged and unusable, affecting the progress of construction.

[0004] However, devices similar to the above-mentioned variable diameter drill are generally symmetrically and concentrically arranged, causing chips to accumulate around the drill bit. The chip blockage causes drill wear and reduced machining accuracy. Therefore, a new solution is needed to solve this problem. Utility Model Content

[0005] In view of the above background technology, the prior art has the disadvantages and defects of chips accumulating around the drill bit, causing drill bit wear and reduced machining accuracy due to chip blockage.

[0006] The variable diameter reaming drill bit disclosed in the utility model comprises a drill rod and a slide plate, wherein the drill bit is mounted on the lower end surface of the drill rod, a cavity is provided on the drill rod, the slide plate is slidably arranged with the cavity, a driving block is slidably arranged on the slide plate, an adjustment assembly is provided between the driving block and the drill rod, and a reaming assembly is provided between the slide plate and the drill rod.

[0007] Furthermore, the two sides of the driving block are inclined surfaces 1 parallel to each other, the slide plate is provided with a through hole, the through hole is provided with an inclined surface 2 which is the same as the inclined surface 1, and the inclined surface 1 and the inclined surface 2 are slidably arranged.

[0008] Furthermore, the adjustment assembly includes a drive rod, which is rotatably mounted on the drill rod and is threadedly connected to the drive block.

[0009] Furthermore, a limit plate is installed on the driving block, and a guide groove is provided on the inner wall of the cavity at a position corresponding to the limit plate, and the cavity and the guide groove are slidably arranged.

[0010] Furthermore, the reaming assembly includes a reaming knife 1, two of which are provided, one end of the two reaming knives 1 are rotatably mounted on the corresponding slide, the other end of the two reaming knives 1 are rotatably mounted on reaming knife 2, an adjustment plate is provided between the two reaming knives 2 and the drill rod, and a fixing part is provided between the adjustment plate and the drill rod.

[0011] Furthermore, the fixing member includes a mounting hole and a threaded hole. The mounting hole is arranged on the adjustment plate, and the threaded hole is arranged on the drill rod. A fixing bolt is arranged inside the mounting hole, and one end of the fixing bolt is threadedly connected to the threaded hole.

[0012] Furthermore, a plurality of threaded holes are provided, and the plurality of threaded holes are evenly distributed.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. The utility model is provided with a driving rod, a driving block, an inclined surface 1, an inclined surface 2, a slide plate and other components. During the working process, the driving rod component, the driving block component and the slide plate component cooperate with each other to adjust the rotation of the driving rod component, and the driving rod pushes the driving block to move. Under the working action of the inclined surface 1 and the inclined surface 2, the slide plate moves to one end, and drives one end of the reaming knife 1 to move along, so that the reaming knife 1 is adjusted to an eccentric setting, increasing the applicable range of the device, and at the same time, the chips move away from the center, thereby avoiding the accumulation of chips around, reducing the wear and the reduction of processing accuracy caused by chip blockage.

[0015] 2. The utility model provides a limit plate, a guide groove, a fixing bolt, a threaded hole, etc., and the limit plate component cooperates with the guide groove during operation, thereby increasing the contact area between the driving block and the drill rod, and guiding and limiting the moving direction of the driving block, thereby improving the stability of the driving block during operation. Through the mutual cooperation between the fixing bolt component and the threaded hole, by connecting the fixing bolt to different threaded holes, the adjustment plate can be limited to different positions, and the distance between the adjustment plate and the slide plate can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the interior of the cavity of the present invention;

[0020] Figure 4 For this utility model Figure 3 A in the middle is an enlarged schematic diagram;

[0021] Figure 5 This is a schematic diagram of the drive block of the utility model.

[0022] In the figure: 1. Drill rod; 2. Drill bit; 3. Cavity; 4. Slide plate; 5. Reamer 1; 6. Reamer 2; 7. Drive block; 8. Inclined surface 1; 9. Through hole; 10. Inclined surface 2; 11. Drive rod; 12. Limit plate; 13. Guide groove; 14. Adjustment plate; 15. Mounting hole; 16. Threaded hole; 17. Fixing bolt. DETAILED DESCRIPTION

[0023] The following diagrams illustrate various embodiments of the present invention. For clarity, many physical details will be included in the following description. However, it should be understood that these physical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these physical details are not essential. Furthermore, to simplify the illustrations, some commonly used structures and components are depicted in a simplified schematic manner.

[0024] See also Figure 1 、 Figure 3 The variable diameter reaming drill bit of the utility model includes a drill rod 1 and a slide 4. A drill bit 2 is installed on the lower end surface of the drill rod 1. A cavity 3 is provided on the drill rod 1. The slide 4 is slidably arranged with the cavity 3. A driving block 7 is slidably arranged on the slide 4. An adjustment component is provided between the driving block 7 and the drill rod 1, and a reaming component is provided between the slide 4 and the drill rod 1.

[0025] The movement of the driving block 7 is controlled by the adjustment component, and the driving block 7 pushes the slide plate 4 to move toward one end. While the slide plate 4 moves, it drives the lower part of the reaming component to follow the movement, thereby changing the lower part of the reaming component to an eccentric setting. Compared with the concentric setting, the eccentric setting can cover a larger cutting area per unit time. The eccentric design makes it easier for chips to be discharged from the cutting area under the action of centrifugal force, because the eccentric reaming component will generate an uneven centrifugal force field when rotating. The chips will be affected by this force and move away from the center of the drill bit 2, thereby avoiding the accumulation of chips around and reducing the problems of wear and reduced machining accuracy caused by chip blockage.

[0026] Combine Figure 2 、 Figure 3 、 Figure 5 As shown, the two sides of the driving block 7 are inclined surfaces 8 parallel to each other, a through hole 9 is provided on the slide plate 4, and the through hole 9 is provided with an inclined surface 2 10 which is the same as the inclined surface 1 8. The inclined surface 1 8 and the inclined surface 2 10 are slidingly arranged. When the driving block 7 moves, the inclined surface 1 8 and the inclined surface 2 10 cooperate with each other, thereby moving the slide plate 4 along the specified direction.

[0027] like Figure 3 、 Figure 4 As shown, the adjustment assembly includes a drive rod 11, which is rotatably mounted on the drill rod 1. The drive rod 11 is threadedly connected to the drive block 7. The staff controls the rotation of the drive rod 11, and the drive rod 11 drives the drive block 7 to move. By changing the rotation direction of the drive rod 11, the moving direction of the drive block 7 is adjusted.

[0028] like Figure 3 、 Figure 4 As shown, a limit plate 12 is installed on the driving block 7, and a guide groove 13 is provided on the inner wall of the cavity 3 corresponding to the position of the limit plate 12. The cavity 3 and the guide groove 13 are slidingly arranged. When the driving block 7 moves, the limit plate 12 is driven to move along. The limit plate 12 slides in the guide groove 13, and the moving direction and position of the limit plate 12 are controlled by the guide groove 13, thereby improving the stability of the working process of the driving block 7.

[0029] like Figure 1 、 Figure 2 As shown, the reaming assembly includes a reaming knife 5, two reaming knives 5 are provided, one end of the two reaming knives 5 are rotatably mounted on the corresponding slide 4, and the other end of the two reaming knives 5 are rotatably mounted on the reaming knife 2 6, an adjustment plate 14 is provided between the two reaming knives 2 6 and the drill rod 1, and a fixing part is provided between the adjustment plate 14 and the drill rod 1. The reaming knife 1 5 and the reaming knife 2 6 cooperate with each other to process a hole larger than the diameter of the drill bit 2, thereby achieving the reaming knife effect.

[0030] The fixing part includes a mounting hole 15 and a threaded hole 16. The mounting hole 15 is provided on the adjusting plate 14, and the threaded hole 16 is provided on the drill rod 1. A fixing bolt 17 is provided inside the mounting hole 15, and one end of the fixing bolt 17 is threadedly connected to the threaded hole 16. The staff drives the fixing bolt 17 to rotate and separates the fixing bolt 17 from the threaded hole 16, thereby releasing the fixation of the adjusting plate 14, and reverses the operation to fix the adjusting plate 14.

[0031] There are multiple threaded holes 16, which are evenly distributed. By connecting the fixing bolts 17 to different threaded holes 16, the adjustment plate 14 is restricted to different heights, and the effect of changing the folding angle between the reaming knife 1 5 and the reaming knife 2 6 is achieved.

[0032] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be included within the scope of the claims of the present invention.

Claims

1. A variable diameter reaming drill bit, comprising a drill rod (1) and a slide plate (4), characterized in that: A drill bit (2) is installed on the lower end surface of the drill rod (1); a cavity (3) is provided on the drill rod (1); the slide plate (4) is slidably arranged with the cavity (3); a driving block (7) is slidably arranged on the slide plate (4); an adjustment component is provided between the driving block (7) and the drill rod (1); and a hole expansion component is provided between the slide plate (4) and the drill rod (1).

2. The variable diameter reaming drill bit according to claim 1, characterized in that: The two sides of the driving block (7) are parallel inclined surfaces (8), the slide plate (4) is provided with a through hole (9), the through hole (9) is provided with an inclined surface (10) identical to the inclined surface (8), and the inclined surface (8) and the inclined surface (10) are slidably arranged.

3. The variable diameter reaming drill bit according to claim 1, characterized in that: The adjustment assembly comprises a driving rod (11), the driving rod (11) is rotatably mounted on the drill rod (1), and the driving rod (11) is threadedly connected to the driving block (7).

4. The variable diameter reaming drill bit according to claim 1, characterized in that: A limiting plate (12) is installed on the driving block (7), and a guide groove (13) is provided on the inner wall of the cavity (3) at a position corresponding to the limiting plate (12), and the cavity (3) and the guide groove (13) are slidably arranged.

5. The variable diameter reaming drill bit according to claim 1, characterized in that: The reaming assembly includes a reaming knife (5), two reaming knives (5) are provided, one end of the two reaming knives (5) are rotatably mounted on the corresponding slide (4), and the other end of the two reaming knives (5) are rotatably mounted on the reaming knife (6), an adjustment plate (14) is provided between the two reaming knives (6) and the drill rod (1), and a fixing member is provided between the adjustment plate (14) and the drill rod (1).

6. The variable diameter reaming drill bit according to claim 5, characterized in that: The fixing member comprises a mounting hole (15) and a threaded hole (16); the mounting hole (15) is arranged on the adjustment plate (14); the threaded hole (16) is arranged on the drill rod (1); a fixing bolt (17) is arranged inside the mounting hole (15); one end of the fixing bolt (17) is threadedly connected to the threaded hole (16).

7. The variable diameter reaming drill bit according to claim 6, characterized in that: A plurality of threaded holes (16) are provided, and the plurality of threaded holes (16) are evenly distributed.

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