Reaming mechanical drill bit

Abstract

The utility model relates to the technical field of drill bits, in particular to a reaming mechanical drill bit which comprises a rotating device, a connecting structure and a rotating rod, the upper end of a drill bit in the rotating device is welded to the lower end of a base, the two sides of the upper end of the base are round and hollow to form first threaded holes, and the upper end of the base is welded to the lower end of a polygonal inserting groove; a connecting structure is inserted into the polygonal inserting groove, the connecting structure is inserted into the two sides of the polygonal inserting groove through a first inserting rod and an inserting rod groove, a second inserting rod at the lower end of a rotating rod is inserted into the polygonal inserting groove in the rotating device, the upper end of the rotating rod is hollow to form an upper end inserting groove, and a connector is inserted into the upper end inserting groove; the second inserting rod is inserted into the polygonal inserting groove in the upper end of the drill bit, the drill bit can be replaced through the drilling rod by means of fixed connection through the connecting structure, and the third inserting rod is inserted into the inserting groove in the upper end so that the connector can be replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a hole-expanding mechanical drill bit. Background Art

[0002] A drill bit is a rotating tool with cutting capabilities at the head end. It is generally made of carbon steel SK or high-speed steel SKH2, SKH3 and other materials. It is milled or rolled and then quenched and heat treated before grinding. It is used for drilling holes in metals or other materials.

[0003] However, the existing drill bits are prone to breakage during drilling and the broken parts are mostly located at the drill rod. The breakage at the drill rod causes the intact drill bit to be unable to continue working and can only be scrapped, which is a waste of materials. In addition, the connector at the upper end of the drill bit is mostly single when connected to the machine and cannot be used by multiple machines, which is inconvenient.

[0004] Therefore, in order to solve the above problems, a hole-expanding mechanical drill bit is proposed. Utility Model Content

[0005] The utility model aims to provide a hole-expanding mechanical drill bit to solve the problems in the prior art mentioned in the above background technology that the drill bit cannot be used further when the drill rod breaks during drilling and the connection point at the upper end of the drill bit is relatively single and cannot be used by multiple machines.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hole-expanding mechanical drill bit, comprising: a rotating device, a connecting structure and a rotating rod, the upper end of the drill bit in the rotating device is welded to the lower end of the base, the two circular sides of the upper end of the base are hollowed out to form a first threaded hole, the upper end of the base is welded to the lower end of the polygonal slot, the connecting structure is inserted into the polygonal slot, the connecting structure uses a first plug rod and a plug rod groove to be inserted on both sides of the polygonal slot, the second plug rod at the lower end of the rotating rod is inserted into the polygonal slot in the rotating device, the upper end of the rotating rod is hollowed out to form an upper end slot, and the connecting head is inserted into the upper end slot.

[0007] Preferably, the outer ring of the drill bit in the rotating device is welded to the inner side of the threaded ring, the upper end of the drill bit is hollow, and the upper end of the drill bit is welded to the lower end of the base.

[0008] Preferably, both sides of the base are circularly hollow to form a first threaded hole, the upper end of the base is welded to the lower end of the polygonal slot, and both sides of the polygonal slot are circularly hollow.

[0009] Preferably, the first insertion rod in the connection structure is inserted and connected with the insertion rod groove, and the first insertion rod is welded to one side of the insertion rod groove and one side of the second threaded hole.

[0010] Preferably, the internal thread of the second threaded hole is hollow, and the first bolt is inserted into the second threaded hole.

[0011] Preferably, the lower end of the drilling rod in the rotating rod is welded to the upper end of the second insertion rod, the upper end of the drilling rod is hollow to form an upper end slot, and the threads on both sides of the upper end slot are hollow.

[0012] Preferably, a third plug rod is inserted into the upper end slot, the upper end of the third plug rod is welded to the lower end of the connector, the middle thread of the third plug rod is hollow, and the upper end slot and the third plug rod thread are hollow for inserting a second bolt.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model can insert the second rod into the polygonal slot on the upper end of the drill bit, and fix the connection with a connecting structure so that the drill bit can be replaced by the drilling rod, and the connecting head can be replaced by inserting the third rod into the upper end slot.

[0014] 1. The utility model is provided with a drill bit, a threaded ring, a base, a first threaded hole, a polygonal slot, a connecting structure, a first plug rod, a plug rod slot, a second threaded hole and a first bolt. The first bolt can be rotatably connected in the threaded hole through the threaded holes on both sides of the base, the first plug rod and the plug rod slot can be inserted into the polygonal slot through the hollow holes on both sides of the polygonal slot, the second plug rod inserted into the polygonal slot will not fall off by inserting the first plug rod and the plug rod slot into the polygonal slot, and the first bolt in the second threaded hole can connect the first plug rod and the plug rod slot to the upper end of the first threaded hole 104.

[0015] 2. The utility model is provided with a drilling rod, a second insertion rod, an upper end slot, a third insertion rod, a connecting head and a second bolt. The second insertion rod at the lower end of the drilling rod can be inserted into the polygonal slot, and the connecting head can be replaced by inserting the third insertion rod at the lower end of the connecting head into the upper end slot. The connecting head can be fixed in the upper end slot by the second bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a front cross-section of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structural section of the utility model;

[0018] Figure 3 It is a schematic top view of the structure of the rotating rod of the utility model;

[0019] Figure 4 It is a schematic top view cross-sectional view of the structure of the rotating device and the connecting structure of the utility model.

[0020] In the figure: 1. rotating device; 101. drill bit; 102. threaded ring; 103. base; 104. first threaded hole; 105. polygonal slot; 2. connecting structure; 201. first plug rod; 202. plug rod slot; 203. second threaded hole; 204. first bolt; 3. rotating rod; 301. drilling rod; 302. second plug rod; 303. upper end slot; 304. third plug rod; 305. connector; 306. second bolt. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-4 , an embodiment provided by the utility model:

[0023] A hole-expanding mechanical drill bit comprises: a rotating device 1, a connecting structure 2 and a rotating rod 3. The upper end of the drill bit 101 in the rotating device 1 is welded to the lower end of a base 103. The circular holes on both sides of the upper end of the base 103 are hollowed out to form a first threaded hole 104. The upper end of the base 103 is welded to the lower end of a polygonal slot 105. The connecting structure 2 is inserted into the polygonal slot 105. The connecting structure 2 uses a first plug rod 201 and a plug rod groove 202 to be inserted on both sides of the polygonal slot 105. The second plug rod 302 at the lower end of the rotating rod 3 is inserted into the polygonal slot 105 in the rotating device 1. The upper end of the rotating rod 3 is hollowed out to form an upper end slot 303. The connecting head 305 is inserted into the upper end slot 303.

[0024] Furthermore, the outer ring of the drill bit 101 in the rotating device 1 is welded to the inner side of the threaded ring 102 , the upper end of the drill bit 101 is hollow, and the upper end of the drill bit 101 is welded to the lower end of the base 103 . The base 103 at the upper end of the drill bit 101 is used to connect to the lower end of the polygonal slot 105 .

[0025] Furthermore, the circular hollows on both sides of the base 103 form first threaded holes 104, the upper end of the base 103 is welded to the lower end of the polygonal slot 105, the polygonal slot 105 has circular hollows on both sides, the first threaded holes 104 on both sides of the base 103 are used to insert the first bolts 204, and the polygonal slot 105 on the upper end of the base 103 is used to insert the second insertion rod 302.

[0026] Furthermore, the first plug rod 201 in the connecting structure 2 is inserted and connected with the plug rod groove 202, and the first plug rod 201 is welded to one side of the plug rod groove 202 and one side of the second threaded hole 203, and the first plug rod 201 is used to be inserted and connected with the plug rod groove 202, and the second threaded hole 203 on one side of the first plug rod 201 and the plug rod groove 202 is used to connect the first bolt 204.

[0027] Furthermore, the internal thread of the second threaded hole 203 is hollow, and the first bolt 204 is inserted into the second threaded hole 203 . The first bolt 204 is used to connect the first insertion rod 201 and the insertion rod groove 202 in the first threaded hole 104 .

[0028] Furthermore, the lower end of the drilling rod 301 in the rotating rod 3 is welded to the upper end of the second insertion rod 302, and the upper end of the drilling rod 301 is hollowed into an upper end slot 303, and the threads on both sides of the upper end slot 303 are hollow. The second insertion rod 302 is used to be inserted into the polygonal slot 105, and the upper end slot 303 at the upper end of the drilling rod 301 is used to insert the third insertion rod 304.

[0029] Furthermore, a third rod 304 is inserted into the upper slot 303, the upper end of the third rod 304 is welded to the lower end of the connecting head 305, the middle thread of the third rod 304 is hollow, and the second bolt 306 is inserted into the hollow space between the upper slot 303 and the third rod 304 threads. The third rod 304 is used to make the connecting head 305 replaceable, and the second bolt 306 is used to connect the third rod 304 to the upper slot 303.

[0030] Working principle: When using, first select a suitable drill bit 101 and insert the second plug rod 302 into the polygonal slot 105, then insert the first plug rod 201 and the plug rod slot 202 from both sides of the polygonal slot 105, so that the first plug rod 201 and the plug rod slot 202 are inserted and connected in the second plug rod 302, and the second threaded hole 203 on one side of the first plug rod 201 and the plug rod slot 202 is aligned with the first threaded hole 104, and then the second threaded hole 203 and the first threaded hole 104 are connected with the first bolt 204, and then a suitable connector 305 is selected, and the third plug rod 304 at the bottom of the connector 305 is inserted into the upper slot 303 and connected by rotating with the second bolt 306.

[0031] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A hole enlarging mechanical drill bit, comprising: A rotating device (1), a connecting structure (2) and a rotating rod (3), characterized in that: the upper end of the drill bit (101) in the rotating device (1) is welded to the lower end of the base (103), the two sides of the upper end of the base (103) are circularly hollowed to form a first threaded hole (104), the upper end of the base (103) is welded to the lower end of a polygonal slot (105), the connecting structure (2) is inserted into the polygonal slot (105), the connecting structure (2) is inserted into the two sides of the polygonal slot (105) with a first insert rod (201) and an insert rod groove (202), the second insert rod (302) at the lower end of the rotating rod (3) is inserted into the polygonal slot (105) in the rotating device (1), the upper end of the rotating rod (3) is hollowed to form an upper end slot (303), and the connecting head (305) is inserted into the upper end slot (303).

2. A hole enlarging mechanical drill bit according to claim 1, characterized in that: The outer ring of the drill bit (101) in the rotating device (1) is welded to the inner side of the threaded ring (102); the upper end of the drill bit (101) is hollow; and the upper end of the drill bit (101) is welded to the lower end of the base (103).

3. A hole enlarging mechanical drill bit according to claim 2, characterized in that: The two sides of the base (103) are circularly hollow to form first threaded holes (104); the upper end of the base (103) is welded to the lower end of the polygonal slot (105); and the two sides of the polygonal slot (105) are circularly hollow.

4. A hole enlarging mechanical drill bit according to claim 1, characterized in that: The first insertion rod (201) in the connection structure (2) is inserted and connected with the insertion rod groove (202), and one side of the first insertion rod (201) and the insertion rod groove (202) is welded to one side of the second threaded hole (203).

5. A hole enlarging mechanical drill bit according to claim 4, characterized in that: The internal thread of the second threaded hole (203) is hollow, and the first bolt (204) is inserted into the interior of the second threaded hole (203).

6. A hole enlarging mechanical drill bit according to claim 1, characterized in that: The lower end of the drilling rod (301) in the rotating rod (3) is welded to the upper end of the second insertion rod (302); the upper end of the drilling rod (301) is hollow to form an upper end slot (303); and the threads on both sides of the upper end slot (303) are hollow.

7. A hole enlarging mechanical drill bit according to claim 6, characterized in that: A third insertion rod (304) is inserted into the upper slot (303), the upper end of the third insertion rod (304) is welded to the lower end of the connector (305), the middle thread of the third insertion rod (304) is hollow, and the upper slot (303) and the third insertion rod (304) threads are hollow to allow a second bolt (306) to be inserted.

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