Pure rolling supporting and cutting integrated reamer bit

Abstract

The utility model discloses a pure rolling centering and cutting integrated reamer bit which comprises a drill rod, inserting grooves are evenly formed in the periphery of the bottom end of the drill rod, pure rolling centering and cutting assemblies are connected to the inner walls of the inserting grooves in a matched and inserted mode, and each pure rolling centering and cutting assembly comprises a sleeve and reaming pieces evenly and fixedly installed on the periphery of the sleeve. A spherical hole is formed in the outer wall of the reaming piece, the inner wall of the spherical hole is rotationally connected with a ball, a center screw hole is formed in the center of the inner wall of the drill rod head end, the inner wall of the center screw hole is in threaded connection with a center rod, and a reaming drill bit is fixedly installed between the sleeve and the reaming piece through a bolt. The reaming drill bit and the reaming pieces are arranged to be matched to conduct step-by-step reaming on the inner wall of the foundation hole, so that power loss of reaming is reduced, the reaming difficulty is reduced, the balls are rotationally connected to the outer walls of the reaming pieces, and friction between the reaming pieces and the foundation hole is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of reaming bits, in particular to a pure rolling supporting and cutting integrated reaming bit. Background Technique

[0002] In the field of mechanical processing, the reaming operation is one of the crucial processes. Many problems have emerged in the actual application of common reaming bits on the current market. During the cutting process of existing traditional reaming bits, due to design limitations, relatively large friction often occurs, which not only reduces the cutting efficiency but also causes the bit to wear quickly, increasing production costs. There is a lack of a rotating structure between the non-cutting position of the cutting structure and the inner wall of the hole, resulting in relatively large friction and significant power loss, making it inconvenient to use. At the same time, after the cutting structure wears, the damaged components cannot be replaced independently, making it inconvenient to use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a pure rolling supporting and cutting integrated reaming bit to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A pure rolling supporting and cutting integrated reaming bit includes a drill rod. Slots are evenly opened around the bottom end of the drill rod, and a pure rolling supporting and cutting component is connected in a plug-in fit with the inner wall of the slots. The pure rolling supporting and cutting includes a sleeve and reaming blades evenly and fixedly installed around the sleeve. A spherical hole is opened on the outer wall of the reaming blade, and a ball is rotatably connected to the inner wall of the spherical hole. A central screw hole is opened at the central position of the inner wall of the head end of the drill rod, and a central rod is threadedly connected to the inner wall of the central screw hole. The reaming bit is fixedly installed between the sleeve and the reaming blade through bolts.

[0006] In a preferred embodiment of the utility model, clamping edges are evenly and fixedly connected to the inner wall of the sleeve, and the clamping edges are connected in a plug-in fit with the inner wall of the slots. Vertical plates are evenly welded around the outer wall of the sleeve, and sector plates are welded between adjacent vertical plates.

[0007] In a preferred embodiment of the utility model, through holes are opened on the inner wall of the sector plate, screw holes are evenly opened on the inner wall of the back of the reaming bit, and bolts are in a communicating fit with the inner walls of the through holes and the screw holes. A plurality of bolts are provided.

[0008] In a preferred embodiment of the utility model, the reaming blade is set to be arc-shaped, a plurality of reaming blades form a circle, a gap is provided between adjacent reaming blades for assisting chip removal, and sawteeth are evenly opened on the outer wall of the bottom end of the reaming blade.

[0009] In a preferred embodiment of the present utility model, a first nut is welded to the outer wall of the drill pipe, a second nut is fixedly installed on the outer wall of the central rod, the head end of the central rod is conical, and the central rod is used for reaming and positioning.

[0010] In a preferred embodiment of the present utility model, the top of the second nut is located below the casing, and the second nut is used for fixedly connecting the casing and the drill pipe.

[0011] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present utility model.

[0012] 1. By combining an integral reaming bit with a split installation structure, the reaming bit has the structural advantages of both split and integral types, facilitating the separate replacement of the pure rolling support cutting assembly and the central rod, reducing the maintenance cost of the reaming bit after wear, and improving the economic efficiency of equipment use;

[0013] 2. By setting the reaming bit and the reaming blade to cooperate to ream the inner wall of the basic hole step by step, the power loss of reaming is reduced, the difficulty of reaming is reduced, and a ball is rotatably connected to the outer wall of the reaming blade, thereby reducing the friction between the reaming blade and the basic hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0015] Figure 1 It is a front view structural schematic diagram of a pure rolling support cutting integral reaming bit;

[0016] Figure 2 It is a rear view structural schematic diagram of a pure rolling support cutting integral reaming bit;

[0017] Figure 3 It is an exploded structural schematic diagram of a pure rolling support cutting integral reaming bit;

[0018] Figure 4 It is a structural schematic diagram of the support cutting assembly in a pure rolling support cutting integral reaming bit;

[0019] Figure 5 It is a rear view structural schematic diagram of the support cutting assembly in a pure rolling support cutting integral reaming bit.

[0020] In the figure: drill pipe 100, first nut 110, slot 120, central screw hole 130, central rod 140, second nut 141, casing 200, clamping edge 210, vertical plate 220, hole expanding piece 230, spherical hole 231, sawtooth 232, sector plate 240, through hole 241, bolt 242, hole expanding drill bit 250. Detailed implementation mode

[0021] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0022] Embodiment 1: As Figures 1 - 3 , it includes a drill pipe 100. Slots 120 are evenly opened around the bottom end of the drill pipe 100. The inner wall of the slot 120 is fitted and connected with a pure rolling assisting cutting component. The pure rolling assisting cutting includes a casing 200 and hole expanding pieces 230 evenly and fixedly installed around the casing 200. A spherical hole 231 is opened on the outer wall of the hole expanding piece 230. A ball is rotatably connected to the inner wall of the spherical hole 231. A central screw hole 130 is opened at the central position of the inner wall of the head end of the drill pipe 100. A central rod 140 is threadedly connected to the inner wall of the central screw hole 130. A hole expanding drill bit 250 is fixedly installed between the casing 200 and the hole expanding pieces 230 through bolts.

[0023] The specific use scenario of this embodiment is: by combining the drill pipe 100 and the pure rolling assisting cutting component, when the drill pipe 100 rotates, it drives the pure rolling assisting cutting component to rotate, cuts the inner wall of the basic hole, so as to achieve the effect of hole expansion. By installing balls on the inner wall of the spherical hole 231, when the hole expanding piece 230 expands the hole and rotates with the inner wall of the basic hole, the non-cutting surface and the inner wall of the basic hole rotate, reducing the friction force, thereby reducing the power loss of the electric drill, improving the energy conservation and environmental protection effect, and at the same time reducing the wear of the hole expanding piece 230.

[0024] Embodiment 2: As Figures 3 - 5 , clamping edges 210 are evenly and fixedly connected to the inner wall of the casing 200. The clamping edges 210 are fitted and connected with the inner wall of the slot 120. Vertical plates 220 are evenly welded around the outer wall of the casing 200. Sector plates 240 are welded between adjacent vertical plates 220. Through holes 241 are opened on the inner wall of the sector plate 240. Threaded holes are evenly opened on the inner wall of the back surface of the hole expanding drill bit 250. Bolts 242 are fitted and communicated with the inner walls of the through holes 241 and the threaded holes. There are several bolts 242. The hole expanding pieces 230 are arranged in an arc shape. Several hole expanding pieces 230 form a circle. There is a gap between adjacent hole expanding pieces 230 for assisting in chip removal. Sawteeth 232 are evenly opened on the outer wall of the bottom end of the hole expanding piece 230.

[0025] The specific usage scenario of this embodiment is as follows: by providing the card edge 210 for mating and plugging connection with the slot 120, it is convenient to make the structure more stable when the sleeve 200 and the drill pipe 100 are docked, avoid the phenomenon of slipping and misalignment between the drill pipe 100 and the sleeve 200, and facilitate the installation and disassembly of the sleeve 200. By providing the upright plate 220 and the sector plate 240 for cooperative use, it is convenient to install the reaming blade 230 and the reaming bit 250, improving the structural stability. The edge position of the reaming blade 230 is provided with a cutting edge, and the reaming blade 230 is used to cut the inner wall around the basic hole during rotation, so as to achieve the effect of reaming.

[0026] Embodiment 3: As Figure 3 , a first nut 110 is welded and connected to the outer wall of the drill pipe 100, a second nut 141 is fixedly installed on the outer wall of the center rod 140, the head end of the center rod 140 is conical, the center rod 140 is used for reaming positioning, the top of the second nut 141 is located below the sleeve 200, and the second nut 141 is used for fixedly connecting the sleeve 200 and the drill pipe 100.

[0027] The specific usage scenario of this embodiment is as follows: by providing the first nut 110 for clamping and fixing the drill pipe 100 when installing the center rod 140, it is convenient to install and disassemble the center rod 140 while the drill pipe 100 remains stationary. By providing the center rod 140 for positioning the center point of the basic hole, the accuracy of reaming is improved, and the center position after reaming is kept consistent with the original position.

[0028] The working principle of the present utility model is as follows: When in use, those skilled in the art sleeved and installed the sleeve 200 at the bottom of the drill pipe 100, then inserted and connected the clamping edge 210 and the slot 120 in a matching manner, and then threadedly connected the central rod 140 and the central screw hole 130 in a matching manner. By using two wrenches to rotate the first nut 110 and the second nut 141 in cooperation respectively, the central rod 140 is clamped with the drill pipe 100, so that the central rod 140 is installed at the head end of the drill pipe 100. At the same time, after the second nut 141 is tightened, it positions the bottom ends of the sleeve 200 and the clamping edge 210, so that the sleeve 200 and the clamping edge 210 are fixedly connected to the head end of the drill pipe 100. Then, the reaming bit 250 is inserted and installed on the outer wall of the sector plate 240, and the reaming bit 250 and the sector plate 240 are fixedly connected by bolts 242, so that the drill pipe 100, the sleeve 200 and the reaming bit 250 form an integral structure. The drill pipe 100 is fixedly installed on the electric drill through a chuck. The central point of the drilling is found by the cooperation of the central rod 140, and reaming is carried out by the reaming bit 250. As the drill bit advances, the bottom and side walls of the reaming piece 230 cut and ream the hole wall. During the rotation of the reaming piece 230, the balls on the outer wall of the reaming piece 230 rotate with the hole wall, reducing the friction between the non-cutting position of the reaming piece 230 and the drilling hole, and correcting the deviation by using the reaming piece 230 as a reference.

[0029] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A pure-rolling and flank-milling integrated reaming bit, comprising a drill pipe (100). Slots (120) are evenly formed around the bottom end of the drill pipe (100), and a pure-rolling and flank-milling component is in plug-in connection with the inner wall of the slots (120). It is characterized in that, The pure-rolling reaming cutter includes a sleeve (200) and reaming blades (230) uniformly and fixedly installed around the sleeve (200). A spherical hole (231) is formed in the outer wall of the reaming blade (230), and a ball is rotatably connected to the inner wall of the spherical hole (231). A central screw hole (130) is formed at the center of the inner wall of the head end of the drill pipe (100), and a central rod (140) is threadedly connected to the inner wall of the central screw hole (130). A reaming bit (250) is fixedly installed between the sleeve (200) and the reaming blade (230) by bolts.

2. The pure-rolling and flank-cutting integrated reaming drill bit according to claim 1, wherein Clamping ridges (210) are uniformly and fixedly connected to the inner wall of the sleeve (200), and the clamping ridges (210) are in plug-in connection with the inner wall of the slot (120). Vertical plates (220) are uniformly welded to the outer periphery of the sleeve (200), and a sector plate (240) is welded between adjacent vertical plates (220).

3. A pure-rolling and flank-cutting integrated reaming bit according to claim 2, characterized in that, A through hole (241) is formed in the inner wall of the sector plate (240). Threaded holes are uniformly formed in the inner wall of the back surface of the reaming bit (250). The through hole (241) and the threaded holes are in communication with bolts (242) in cooperation, and a plurality of bolts (242) are provided.

4. A pure-rolling and cutting-edge integrated reaming bit according to claim 3, characterized in that The reaming blade (230) is arc-shaped, and a plurality of reaming blades (230) form a circle. A gap is provided between adjacent reaming blades (230), and the gap is used for chip removal assistance. Saw teeth (232) are uniformly formed on the outer wall of the bottom end of the reaming blade (230).

5. A pure-rolling reaming and cutting integrated reaming bit according to claim 1, wherein, A first nut (110) is welded to the outer wall of the drill pipe (100), and a second nut (141) is fixedly installed on the outer wall of the central rod (140). The head end of the central rod (140) is conical, and the central rod (140) is used for reaming positioning.

6. The one-piece reaming drill bit with pure rolling and cutting according to claim 5, characterized in that The top of the second nut (141) is located below the sleeve (200), and the second nut (141) is used for fixedly connecting the sleeve (200) and the drill pipe (100).

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