Adjustable ceramic tile trepanning drill bit

Abstract

The utility model provides an adjustable ceramic tile trepanning drill bit which comprises a cutter bar frame, a movable seat, a positioning drill, a cutter, an elastic supporting rod piece and a rolling piece, the middle of the cutter bar frame is sleeved with the movable seat, the positioning drill is installed on the movable seat and comprises a drill tip and a drill handle, and the drill tip and the drill handle are longitudinally arranged at the bottom end and the top end of the movable seat respectively. The drill tip and the drill handle are located on the same axis. One end of the cutter bar frame is bent downwards and provided with the cutter, the other end of the cutter bar frame is longitudinally provided with the elastic supporting rod piece in a penetrating mode, the lower end of the elastic supporting rod piece is rotationally provided with the rolling piece, and the bottom end of the rolling piece is slightly lower than the cutter and the drill tip. The elastic supporting rod piece can play a role in elastic supporting, and the cutter can be tightly attached to the surface of the ceramic tile under the effect of the lever, so that the problem that no round hole exists and even cutting is not achieved during trepanning is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hole-making tools, and in particular relates to an adjustable tile hole-making drill bit. Background Art

[0002] During the paving process of ceramic tiles, wall tiles and other materials, it is necessary to open circular holes on the surface of the ceramic tiles for the passage of various water and electricity pipes or range hood exhaust pipes, etc. When opening circular holes of different diameters, traditional sleeve drill bits need to be replaced with drill bits of different diameters, which is complicated to operate. In the prior art, adjustable drill bits use a positioning drill in combination with a position-adjustable cutter to meet the needs of opening holes of different diameters. For example, Chinese patent document: CN201921051024.4 discloses a high-efficiency, adjustable tile-specific hole-opening drill bit. In this application, the cutter is only provided on one side of the cutter bar holder. When cutting holes, the positioning drill needs to be kept perpendicular to the tile. Otherwise, if the positioning drill is tilted, the cutter may warp during rotation, and the cutter will not come into contact with the surface of the circular hole of the tile, thereby affecting the quality of the hole opening. In this application, the fixing seat and the cutter bar holder are fixed with bolts for pressure. The bolts need to be screwed during adjustment. This positioning method is prone to problems such as overtightening or loosening of the bolts, affecting the normal positioning of the fixing seat. Utility Model Content

[0003] The main purpose of the utility model is to provide an adjustable tile hole drilling bit, which solves the problems in the prior art of tile hole drilling bits that are prone to uneven drilling and the movable seat cannot be effectively positioned.

[0004] The specific technical solutions are as follows:

[0005] The present invention relates to an adjustable tile hole drilling bit, comprising a tool rod holder, a movable seat, a positioning drill, a cutter, an elastic support rod and a rolling member, wherein the movable seat is sleeved on the middle part of the tool rod holder, and the positioning drill is longitudinally mounted on the movable seat, and the positioning drill comprises a drill tip and a drill shank, and the drill tip and the drill shank are separately arranged and longitudinally arranged at the bottom end and the top end of the movable seat respectively, and the drill tip and the drill shank are located on the same axis; one end of the tool rod holder is bent downward and the cutter is mounted thereon, and the bottom end of the cutter is flush with the bottom end of the drill tip, and the elastic support rod is longitudinally penetrated on the other end of the tool rod holder, and the elastic support rod is elastically connected to the tool rod holder, and a rolling member is provided at the lower end of the elastic support rod for rotation, and the bottom end of the rolling member is slightly Lower than the cutting knife and drill tip; a movable groove is horizontally opened in the middle of the tool rod holder, and a flared portion is provided on one side of the movable groove, and the inner walls of the upper and lower ends of the flared portion are inclined and arranged horizontally with a plurality of racks, and an insert is embedded in the flared portion, and the upper and lower ends of the insert are contracted and provided with tooth grooves matching the racks, one end of the insert passes through one side of the movable seat, and a push rod is horizontally provided at the other end of the insert, one end of the push rod horizontally passes through the movable groove and the other side of the movable seat and is provided with a push plate, and a first spring is sleeved on the push rod, and the two ends of the first spring respectively press on the push plate and the movable seat and make the first spring push the push rod toward one end, so that the insert is pressed into the flared portion and limited under the cooperation of the rack and the tooth groove.

[0006] Furthermore, a guide strip is laterally provided at the upper end of the tool rod holder, and a guide groove adapted to the guide strip is provided at the top end of the inner wall of the movable seat, thereby realizing a sliding connection between the movable seat and the tool rod holder.

[0007] Furthermore, the elastic support rod member includes a guide rod, a limit block, a baffle, a second spring and a rotating seat. The guide rod is longitudinally penetrated and arranged at one end of the tool rod holder. The limit block is provided at the upper end of the guide rod, the baffle is provided at the lower end of the guide rod, and the second spring is sleeved on the lower end of the guide rod. The upper and lower ends of the second spring are respectively pressed against the tool rod holder and the baffle, and the second spring presses the guide rod downward. A rotating seat is provided at the bottom end of the guide rod, and the rolling element is rotatably arranged in the rotating seat. The rolling element is a roller, and the drill tip and the cutter are both located in the axial direction of the roller.

[0008] Furthermore, the roller is made of rubber.

[0009] Furthermore, both sides of the rack are contracted, and both sides of the tooth groove are expanded and matched with the rack.

[0010] Furthermore, the diameter of the push rod is adapted to the width of the other side of the movable slot.

[0011] The beneficial effects of the present invention are as follows:

[0012] (1) The utility model provides a cutter at one end of the guide rod and an elastic support rod at the other end. The roller at the lower end of the elastic support rod is slightly lower than the cutter, so that when the electric drill drives the positioning drill to rotate, even if the electric drill tilts, the elastic support rod can play an elastic supporting role and enable the cutter to stick to the surface of the tile under the action of the lever, avoiding the problem of no round hole and uneven cutting when drilling, thereby ensuring the quality of the hole.

[0013] (2) In the present invention, the movable seat and the tool holder are positioned by the engagement of the insert block with the movable groove, and when adjusting the position of the movable seat, the insert block is separated from the movable groove by pressing the push plate, and then the movable seat is moved and the push rod is released. Under the action of the spring, the tooth groove on the insert block can automatically engage with the rack on the movable groove to achieve positioning. The operation is simple and convenient, and the problem of poor positioning effect of the movable seat is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the present utility model.

[0015] Figure 2 It is a cross-sectional view between the movable seat and the tool rod holder in the utility model.

[0016] Figure 3 It is a three-dimensional diagram of the embedded block and the push rod in the utility model.

[0017] Explanation of the accompanying drawings: tool rod holder 1, movable groove 11, flared portion 111, rack 112, guide bar 12, movable seat 2, guide groove 21, insert 3, tooth groove 31, push rod 32, push plate 33, first spring 34, drill tip 4, drill shank 5, cutter 6, guide rod 7, limit block 71, baffle 72, second spring 73, rotating seat 74, roller 75. DETAILED DESCRIPTION

[0018] To make the technical solution of the present invention clearer and more specific, the present invention is further described below with reference to the accompanying drawings. Any equivalent replacement of the technical features of the present invention and any solution derived from conventional reasoning shall fall within the scope of protection of the present invention. The fixed connections and fixed arrangements mentioned in the present invention are all common connection methods in the mechanical field, including welding, bolt and nut connections, and screw connections.

[0019] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] See attached Figure 1-3 The present embodiment provides an adjustable tile hole drilling bit, including a tool rod frame 1, a movable seat 2, a positioning drill, a cutter 6, an elastic support rod and a rolling member. The movable seat 2 is sleeved on the middle part of the tool rod frame 1, and a through hole is provided on the inner side of the movable seat 2 for accommodating a guide rod 7, so that the movable seat 2 is laterally movably arranged on the tool rod frame 1, and a positioning drill is longitudinally installed on the movable seat 2. The positioning drill includes a drill tip 4 for positioning on the tile and a drill shank 5 for clamping and driving the electric drill chuck. The drill tip 4 and the drill shank 5 are separately arranged and longitudinally arranged at the bottom and top of the movable seat 2 respectively, and the drill tip 4 and the drill shank 5 are located on the same axis; one end of the tool rod frame 1 is bent downward and a cutter 6 is installed, and the bottom end of the cutter 6 is flush with the bottom end of the drill tip 4. An elastic support rod is longitudinally penetrated on the other end of the tool rod frame 1, and the elastic support rod is elastically connected to the tool rod frame 1. A rolling member is provided at the lower end of the elastic support rod for rotation The cam 31 is provided with a plurality of toothed plates 112 on the upper and lower ends of the cam 31, and the cam 31 is provided with a plurality of toothed plates 113 on the lower ends of the cam 31.

[0021] In this embodiment, a guide strip 12 is provided laterally at the upper end of the tool bar holder 1 , and a guide groove 21 adapted to the guide strip 12 is provided at the top of the inner wall of the movable seat 2 to achieve a sliding connection between the movable seat 2 and the tool bar holder 1 .

[0022] In this embodiment, the elastic support member includes a guide rod 7, a limit block 71, a baffle 72, a second spring 73, and a rotating seat 74. The guide rod 7 is longitudinally arranged at one end of the cutter bar frame 1. The upper end of the guide rod 7 is provided with a limit block 71, the lower end of the guide rod 7 is provided with a baffle 72, and the lower end of the guide rod 7 is sleeved with the second spring 73. The upper and lower ends of the second spring 73 respectively press against the cutter bar frame 1 and the baffle 72, and cause the second spring 73 to press the guide rod 7 downward. The bottom end of the guide rod 7 is provided with a rotating seat 74, and the rolling element is rotatably arranged in the rotating seat 74. The rolling element is a roller 75, and the drill tip 4 and the cutter 6 are both located in the axial direction of the roller 75. The outer periphery of the roller 75 is spherical and made of rubber to prevent the roller 75 from damaging the tiles when rolling on them.

[0023] In this embodiment, both sides of the rack 112 are contracted, and both sides of the tooth groove 31 are expanded and matched with the rack 112 , so that the rack 112 and the tooth groove 31 are engaged with each other to realize the limiting function.

[0024] In this embodiment, the diameter of the push rod 32 is adapted to the width of the other side of the movable groove 11 to ensure that when the movable seat 2 is displaced, the push rod 32 and the fitting will not tilt, thereby affecting the normal fitting of the insert 3 and the movable groove 11.

[0025] When using the present invention, the drill handle 5 is fixed to the drill chuck of the electric drill. When the electric drill starts to contact the tile, the roller 75 first contacts the tile surface, and then is pressed downward, and the direction of the electric drill is kept perpendicular to the tile surface. At this time, the roller 75, the cutter 6, and the drill tip 4 all contact the tile surface. The electric drill is started, and the positioning drill drives the cutter 6 on the arbor 1 to revolve during the rotation process, thereby cutting a circular hole in the tile. If the electric drill is slightly tilted before the hole is opened, the drill tip 4 will not be able to contact the tile surface, and the hole cannot be opened. Therefore, when using the electric drill, it is necessary to press the electric drill, and then, under the action of the lever, the cutter 6 is pressed against the tile surface, thereby ensuring the quality of the hole.

[0026] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An adjustable tile hole drill bit, characterized in that: The present invention comprises a tool bar frame (1), a movable seat (2), a positioning drill, a cutter (6), an elastic supporting rod and a rolling element. The movable seat (2) is sleeved on the middle part of the tool bar frame (1), and the positioning drill is longitudinally mounted on the movable seat (2). The positioning drill comprises a drill tip (4) and a drill shank (5). The drill tip (4) and the drill shank (5) are separately arranged and longitudinally arranged at the bottom and top ends of the movable seat (2), respectively, and the drill tip (4) and the drill shank (5) are located on the same axis. One end of the rod frame (1) is bent downward and mounted with the cutter (6), the bottom end of the cutter (6) is flush with the bottom end of the drill tip (4), the other end of the knife bar frame (1) is longitudinally penetrated by the elastic support rod, the elastic support rod is elastically connected to the knife bar frame (1), the lower end of the elastic support rod is rotatably provided with a rolling element, the bottom end of the rolling element is slightly lower than the cutter (6) and the drill tip (4); a movable groove (11) is horizontally opened in the middle of the knife bar frame (1), the movable groove (11) is A flared portion (111) is provided on one side of the movable groove (11), and the inner walls of the upper and lower ends of the flared portion (111) are both inclined and arranged with a plurality of racks (112) arranged transversely, and an insert (3) is embedded in the flared portion (111), and the upper and lower ends of the insert (3) are both contracted and provided with tooth grooves (31) that match the racks (112), one end of the insert (3) passes through one side of the movable seat (2), and the other end of the insert (3) is horizontally provided with a push rod (32), and the push rod One end of (32) horizontally passes through the movable groove (11) and the other side of the movable seat (2) and is provided with a push plate (33), and a first spring (34) is sleeved on the push rod (32), and the two ends of the first spring (34) are respectively pressed against the push plate (33) and the movable seat (2) and the first spring (34) pushes the push rod (32) toward one end, so that the insert (3) is pressed into the expanded portion (111) and the limit is achieved under the cooperation of the rack (112) and the tooth groove (31).

2. The adjustable tile hole drilling bit according to claim 1, characterized in that: A guide strip (12) is laterally provided at the upper end of the knife bar frame (1), and a guide groove (21) adapted to the guide strip (12) is provided at the top end of the inner wall of the movable seat (2), thereby realizing a sliding connection between the movable seat (2) and the knife bar frame (1).

3. The adjustable tile hole drilling bit according to claim 1, characterized in that: The elastic support rod comprises a guide rod (7), a limit block (71), a baffle (72), a second spring (73) and a rotating seat (74); the guide rod (7) is longitudinally penetrated and arranged at one end of the tool rod frame (1); the upper end of the guide rod (7) is provided with a limit block (71); the lower end of the guide rod (7) is provided with a baffle (72); and the lower end of the guide rod (7) is sleeved with the second spring (73); the upper and lower ends of the second spring (73) are respectively pressed against the tool rod frame (1) and the baffle (72), and the second spring (73) presses the guide rod (7) downward; the bottom end of the guide rod (7) is provided with a rotating seat (74); the rolling element is rotatably arranged in the rotating seat (74); the rolling element is a roller (75), and the drill tip (4) and the cutter (6) are both located in the axial direction of the roller (75).

4. The adjustable tile hole drilling bit according to claim 3, characterized in that: The roller (75) is made of rubber.

5. The adjustable tile hole drilling bit according to claim 1, characterized in that: Both sides of the rack (112) are configured to be contracted, and both sides of the tooth groove (31) are configured to be expanded and matched with the rack (112).

6. The adjustable tile hole drilling bit according to claim 1, characterized in that: The diameter of the push rod (32) is adapted to the width of the other side of the movable groove (11).

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