Inserted hob drill bit drilling tool capable of adjusting drilling diameter

Abstract

The inserted tooth hob drill bit drilling tool capable of adjusting the drilling diameter comprises a top plate and an adjusting mechanism arranged in the middle of the top plate and further comprises a drilling mechanism arranged below the top plate, and the adjusting mechanism comprises a rotating disc, a rotating ring, a limiting ring, a sliding rail, a lateral moving hydraulic rod and a drilling base. The drilling mechanism comprises a driving motor, the driving motor is fixed into a drilling base through a bolt, a rotating base is arranged at the rotating end of the driving motor, and a driving shaft is arranged below the rotating base. The driving motor drives the driving shaft to rotate to conduct drilling operation, while drilling is conducted, the rotating disc rotates, the lateral moving hydraulic rod drives the driving shaft to move along the sliding rail through the drilling base, and therefore the drilling diameter is adjusted instead of pushing the broaching blade to open to adjust the drilling diameter, the drilling diameter adjusting range is widened, and the drilling efficiency is improved. And the abrasion speed of the inserted hob drill bit is reduced.

Description

Technical Field

[0001] This utility model relates to the field of drilling fixtures for toothed hob drill bits, and in particular to a drilling fixture for toothed hob drill bits with adjustable drilling diameter. Background Technology

[0002] Inserted toothed hobbing drill bits consist of several cutting edges mounted on the drill bit body. These cutting edges typically feature an inserted tooth design to enhance the drill bit's wear resistance and service life. One type, a vibration-damping inserted toothed hobbing drill bit, is designed for easy installation without rotating the drill bit or drill rod, solving the problem of difficult installation with existing drill bits. Inserted toothed hobbing drill bits have wide applications in engineering operations, especially in situations requiring high-efficiency, wear-resistant drill bits. For example, in mining, geological exploration, and construction, inserted toothed hobbing drill bits can handle complex geological conditions and improve operational efficiency.

[0003] In the prior art, Chinese invention patent CN109681123A, authorized by publication number CN109681123A, provides a diameter-adjustable drill bit and a segmented reaming method, relating to the field of mining drill bit technology. It solves the technical problem of needing to replace the drill bit when changing the borehole diameter. The drill bit structure includes a drilling mechanism, a borehole diameter adjustment mechanism, and a drill rod mechanism. The drilling mechanism includes an outer drill barrel, drilling blades, reaming blades, and a spring. The drilling blades are located at the end of the outer drill barrel, and the reaming blades are hinged to the side wall of the outer drill barrel. The borehole diameter adjustment mechanism includes an inner drill shaft and a one-way bearing. The one-way bearing is fixed to the inner wall of the outer drill barrel, and a limit pin is provided on the inner side of the one-way bearing. The limit pin slides within a vertical guide groove on the inner drill shaft. The drill rod mechanism includes a rod body, an end, and a auger cap. A mating groove is provided at both ends of the rod body, and a auger cap is provided at one end of the rod body. By using the above drill bit to drill, the borehole diameter can be adjusted by changing the drilling direction of the drill rod, achieving the purpose of segmented reaming within the borehole. This invention has the advantages of high drilling efficiency and convenient construction.

[0004] Problems compared to existing technologies: Existing toothed hob drill bits with adjustable drilling diameters adjust the drilling diameter by pushing the reamer to open during use. The adjustment range is small, and opening the reamer can easily reduce the strength of the toothed hob drill bit, resulting in accelerated wear of the toothed hob drill bit.

[0005] Therefore, there is an urgent need for a drilling tool with an adjustable borehole diameter insert hob. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a drilling tool for an adjustable drilling diameter toothed hob drill bit.

[0007] The present invention solves its technical problem through the following technical solution: It includes a top plate and an adjustment mechanism located in the middle of the top plate for adjusting the drilling diameter of the toothed hob drill bit. It also includes a drilling mechanism located below the top plate for driving the toothed hob drill bit to rotate. The adjustment mechanism includes a turntable rotatably connected to the middle of the top plate. A rotating ring is provided on the outer wall of the turntable, and a limiting ring is provided on the inner wall of the top plate. The rotating ring and the limiting ring are rotatably connected. A slide rail is provided in the middle of the turntable, and a lateral hydraulic rod is provided at one end of the slide rail. A drilling base is provided at the extended end of the lateral hydraulic rod. The drilling mechanism includes a drive motor, which is fixed to the inside of the drilling base by bolts. A rotating base is provided at the rotating end of the drive motor, and a drive shaft is provided below the rotating base.

[0008] As a further embodiment of this utility model: the drive shaft is provided with a lifting mechanism for adjusting the drilling depth of the toothed hob drill bit. The lifting mechanism includes a servo motor, which is fixed to the inside of the rotating base by bolts. The rotating end of the servo motor is provided with a lead screw, and the outside of the lead screw is provided with a telescopic arm. The telescopic arm is slidably connected to the drive shaft, and one end of the telescopic arm is provided with a toothed hob drill body.

[0009] As a further embodiment of this utility model: a driving mechanism is provided above the top plate for driving the turntable to rotate. The driving mechanism includes a geared motor, which is fixed to the top plate by bolts. A worm is provided at the rotating end of the geared motor. A gear ring is provided above the turntable. A gear is provided on the outer side of the gear ring. A worm wheel is provided above the gear.

[0010] As a further improvement of this utility model: a mounting bracket is provided above the baffle, and one end of the mounting bracket is rotatably connected to the worm gear.

[0011] As a further improvement of this utility model, multiple support legs are provided below the top plate.

[0012] As a further improvement of this utility model, a foot is provided below the support leg.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0014] 1. The drive motor drives the drive shaft to rotate, and drilling is performed. At the same time, the turntable rotates and the lateral hydraulic rod drives the drive shaft to move along the slide rail through the drilling base, thereby adjusting the drilling diameter. This replaces the method of pushing the reamer to open and adjust the drilling diameter, which improves the drilling diameter adjustment range and reduces the wear rate of the toothed hob drill bit.

[0015] 2. The lead screw is driven to rotate by a servo motor, and the lead screw drives the toothed hob drill body to rise and fall through the telescopic arm. This allows the toothed hob drill bit drilling tool with adjustable drilling diameter to meet drilling operations at different depths, thus enriching the functionality of the toothed hob drill bit drilling tool with adjustable drilling diameter. Attached Figure Description

[0016] Figure 1 A schematic diagram of an isometric structure according to an embodiment of the present invention is shown;

[0017] Figure 2 A schematic diagram of the front cross-sectional structure according to an embodiment of the present invention is shown;

[0018] Figure 3 A side sectional view of the structure according to an embodiment of the present invention is shown;

[0019] Figure 4 The present invention provides an embodiment of the present invention. Figure 2 A magnified view of the structure at point A in the middle;

[0020] Figure 5 The present invention provides an embodiment of the present invention. Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0021] Legend:

[0022] 100, Top plate; 200, Mounting bracket; 300, Support legs; 400, Footplate;

[0023] 101. Turntable; 102. Limiting ring; 103. Rotating ring; 104. Slide rail; 105. Lateral hydraulic rod; 106. Drilling base;

[0024] 201. Drive motor; 202. Rotating base; 203. Drive shaft;

[0025] 301. Servo motor; 302. Lead screw; 303. Telescopic arm; 304. Toothed hob body;

[0026] 401. Gear ring; 402. Gear; 403. Gearbox; 404. Worm; 405. Worm wheel. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] Example 1:

[0031] like Figure 1-5 As shown, a drilling fixture for an adjustable-diameter toothed hob drill bit includes a top plate 100 and an adjustment mechanism located in the middle of the top plate 100 for adjusting the drilling diameter of the toothed hob drill bit. It also includes a drilling mechanism located below the top plate 100 for driving the toothed hob drill bit to rotate. The adjustment mechanism includes a turntable 101 rotatably connected to the middle of the top plate 100. A rotating ring 103 is welded to the outer wall of the turntable 101. A limiting ring 102 is bolted to the inner wall of the top plate 100. The rotating ring 103 is rotatably connected to the limiting ring 102, thereby limiting the turntable 101 to rotate parallel to the top plate 100. A slide rail 104 is cut in the middle of the turntable 101. A lateral hydraulic rod 105 is bolted to one end of the slide rail 104. A drilling base 106 is bolted to the extended end of the lateral hydraulic rod 105. The lateral hydraulic rod 105 drives the drilling base 106 to slide along the slide rail 104, thereby adjusting the position of the drilling base 106 on the turntable 101. Multiple support legs 300 are welded below the top plate 100 to support the top plate 100. The drilling mechanism includes a drive motor 201, which is fixed to the inside of the drilling base 106 by bolts. The rotating end of the drive motor 201 is fixed to a rotating base 202 by bolts. The drive motor 201 drives the rotating base 202 to rotate. A drive shaft 203 is fixed to the bottom of the rotating base 202 by bolts. The rotating base 202 drives the drive shaft 203 to rotate synchronously. The support legs 300 are fixed to the bottom by bolts with feet 400. The feet 400 are fixed to the worktable or the ground by bolts to prevent the adjustable drilling diameter toothed hob drill bit from moving during the drilling process.

[0032] In this embodiment, the operator first fixes the base 400 to the workbench or ground with bolts. Then, the drive motor 201 drives the drive shaft 203 to rotate to perform drilling. While drilling, the turntable 101 rotates, and the lateral hydraulic rod 105 drives the drive shaft 203 to move along the slide rail 104 through the drilling base 106, thereby adjusting the drilling diameter. This replaces the method of pushing the reamer to open and adjust the drilling diameter, improving the drilling diameter adjustment range and reducing the wear rate of the toothed hob drill bit.

[0033] Example 2:

[0034] like Figure 1-5 As shown, a drilling fixture for an adjustable-diameter toothed hob drill bit is disclosed. The drive shaft 203 has an internal lifting mechanism for adjusting the drilling depth of the toothed hob drill bit. The lifting mechanism includes a servo motor 301, which is bolted to the interior of a rotating base 202. A lead screw 302 is bolted to the rotating end of the servo motor 301, causing the lead screw 302 to rotate. A telescopic arm 303 is connected to the outer side of the lead screw 302, and the telescopic arm 303 is slidably connected to the drive shaft 203. The lead screw 302 causes the telescopic arm 303 to rise and fall along the drive shaft 203. One end of the telescopic arm 303 is bolted to a toothed hob drill body 304. A drive unit is located above the top plate 100. The drive mechanism is used to drive the turntable 101 to rotate. The drive mechanism includes a geared motor 403, which is fixed to the top plate 100 by bolts. The rotating end of the geared motor 403 is fixed to a worm gear 404 by bolts. The geared motor 403 drives the worm gear 404 to rotate. A mounting bracket 200 is fixed to the top of the baffle by bolts. One end of the mounting bracket 200 is rotatably connected to the worm gear 404. A gear ring 401 is fixed to the top of the turntable 101 by bolts. A gear 402 meshes with the outer side of the gear ring 401. The gear 402 drives the gear ring 401 to rotate, thereby driving the turntable 101 to rotate. A worm wheel 405 is fixed to the top of the gear 402 by bolts. The worm wheel 405 cooperates with the worm gear 404 to prevent the turntable 101 from reversing.

[0035] In this embodiment, when it is necessary to adjust the drilling depth, the operator starts the servo motor 301, which drives the lead screw 302 to rotate. The lead screw 303 drives the toothed hob drill body 304 to rise and fall through the telescopic arm 303, so that the toothed hob drill bit drilling tool with adjustable drilling diameter can meet the drilling operations of different depths, thus enriching the functionality of the toothed hob drill bit drilling tool with adjustable drilling diameter.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A drilling fixture for an adjustable bore diameter toothed hob drill bit, characterized in that, Includes a top plate (100) and an adjustment mechanism located in the middle of the top plate (100), used to adjust the drilling diameter of the hole drilled by the toothed hob. It also includes a drilling mechanism located below the top plate (100) for driving the toothed hob drill bit to rotate. The adjustment mechanism includes a turntable (101) rotatably connected to the middle position of the top plate (100). A rotating ring (103) is provided on the outer wall of the turntable (101), and a limiting ring (102) is provided on the inner wall of the top plate (100). The rotating ring (103) is rotatably connected to the limiting ring (102). A slide rail (104) is provided at the middle position of the turntable (101). A lateral hydraulic rod (105) is provided at one end of the slide rail (104), and a drilling base (106) is provided at the extended end of the lateral hydraulic rod (105). The drilling mechanism includes a drive motor (201), which is fixed inside the drilling base (106) by bolts. The rotating end of the drive motor (201) is provided with a rotating base (202), and a drive shaft (203) is provided below the rotating base (202).

2. The adjustable borehole diameter toothed hob drilling fixture according to claim 1, characterized in that, The drive shaft (203) is equipped with a lifting mechanism inside, which is used to adjust the drilling depth of the toothed hob drill bit. The lifting mechanism includes a servo motor (301), which is fixed to the inside of the rotating base (202) by bolts. The rotating end of the servo motor (301) is provided with a lead screw (302), and a telescopic arm (303) is provided on the outside of the lead screw (302). The telescopic arm (303) is slidably connected to the drive shaft (203), and one end of the telescopic arm (303) is provided with a toothed hob drill body (304).

3. The adjustable drilling diameter toothed hob drilling tooling according to claim 1, characterized in that, A drive mechanism is provided above the top plate (100) for driving the turntable (101) to rotate. The drive mechanism includes a geared motor (403), which is fixed to the top plate (100) by bolts. A worm gear (404) is provided at the rotating end of the geared motor (403). A gear ring (401) is provided above the turntable (101). A gear (402) is provided on the outside of the gear ring (401). A worm wheel (405) is provided above the gear (402).

4. The adjustable borehole diameter toothed hob drilling fixture according to claim 3, characterized in that, A mounting bracket (200) is provided above the top plate (100), and one end of the mounting bracket (200) is rotatably connected to the worm gear (404).

5. The adjustable borehole diameter toothed hob drilling fixture according to claim 1, characterized in that, Multiple support legs (300) are provided below the top plate (100).

6. The drilling fixture for an adjustable drilling diameter toothed hob drill bit according to claim 5, characterized in that, The support leg (300) is provided with a foot (400) below it.

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