Rack type drilling tool with replaceable cutting edge

Abstract

The utility model relates to the technical field of turnout nylon sleeve taking-out, in particular to a rack type drilling tool with a replaceable cutting edge. Comprising a drill bit of a hollow structure; the chip groove is circumferentially formed in the outer wall of the drill bit and penetrates through the bottom end face of the drill bit; the number of the first assembly grooves is two, the first assembly grooves are correspondingly formed in the upper portions of one side walls of any two chip grooves, and the heights of the two first assembly grooves are different; the number of the first cutting knife is one, and the first cutting knife is detachably locked to the first assembling groove in any position through a fastening screw; the number of the second assembling grooves is three, and the second assembling grooves are correspondingly formed in the bottom of one side wall of each chip discharging groove. The second cutter is detachably locked to the second assembling groove through a fastening screw, and the upper end face and the lower end face of the second cutter are each provided with a cutting edge. According to the utility model, the cutters II are arranged on the three assembly grooves II, and the cutters II can be overturned, exchanged and mounted, so that the secondary service life can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of taking out a turnout nylon sleeve, in particular to a rack-type drilling tool with a replaceable blade. Background Art

[0002] At present, the sleepers of high-speed railways, light rails, subways, etc. use embedded sleeves (nylon sleeves) made of nylon materials to fix the fixing bolts to the rails. However, in actual use, the embedded nylon sleeves are easily damaged by thread slippage due to the impact of alternating loads after the nylon sleeves are combined with the fixing bolts, and need to be replaced in time. The existing drilling machine is used to drill and cut the nylon sleeves to complete the removal of the nylon sleeves.

[0003] However, the existing drilling tools, such as the multifunctional embedded sleeve removal drill disclosed in CN105350412B, have a cutting tool and a drill body that are integrally arranged. After long-term cutting, the cutting tool will wear out, and the entire drill bit needs to be replaced, which increases the economic cost of the operation. Utility Model Content

[0004] The utility model aims to provide a frame-type drilling tool with replaceable blades. The cutting tool 2 is installed on three assembly grooves 2 by design, and the cutting tool 2 can be turned over and replaced for secondary use, thereby extending the overall service life of the cutting tool.

[0005] In order to solve the above technical problems, the utility model provides a frame-type drilling tool with replaceable blades, comprising:

[0006] The drill bit is provided with a hollow structure;

[0007] A chip removal groove is circumferentially formed on the outer wall of the drill bit and penetrates the bottom end surface of the drill bit;

[0008] The first assembly groove is arranged in two and is correspondingly opened at the upper part of one side wall of any two of the chip removal grooves, and the heights of the two first assembly grooves are different;

[0009] A cutting blade 1 is provided, which can be detachably locked on the assembly groove 1 at any position by a fastening screw;

[0010] The second assembly groove is arranged in three pieces and is correspondingly opened at the bottom of a side wall of each of the chip removal grooves;

[0011] The second cutting blade is detachably locked on the second assembly groove by a fastening screw, and the upper and lower end surfaces of the second cutting blade are both provided with cutting edges.

[0012] Preferably, the top end of the drill bit further includes an integrally formed connector, and the connector further includes an axially opened conical connecting hole.

[0013] Preferably, the number of the chip removal grooves opened in the circumferential direction is three, and the chip removal grooves are arranged in a curved spiral groove structure.

[0014] Preferably, the second assembly groove is arranged in an L-shaped groove structure, and the first assembly groove and the second assembly groove also include fastening screw holes opened thereon for tightening the fastening screws.

[0015] Preferably, the fastening screw is a locking screw.

[0016] Preferably, the first cutting blade and the second cutting blade are both made of high-hardness alloy blades.

[0017] Preferably, the second cutting blade is a parallelogram structure.

[0018] Preferably, when the second cutting blade is installed on the assembly groove, the angle between the bottom blade surface of the second cutting blade and the radial end surface of the drill bit is 3 to 10 degrees.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model is designed to install the cutting blade 2 on three assembly grooves 2, and the cutting blade 2 can be turned over and replaced for installation, so that the secondary service life can be extended; and when the cutting blade 2 is installed on the assembly groove 2, the angle between the bottom blade surface of the cutting blade 2 and the radial end surface of the drill bit is 3-10 degrees, so that the cutting effect of the cutting blade 2 on the nylon sleeve can be improved; and the utility model can realize the cutting of the top thickness of nylon sleeves of different lengths by adding the cutting blade 1 whose assembly position can be selected according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model provides a three-dimensional rack-type drilling tool with replaceable blade Figure 1 .

[0022] Figure 2 The utility model provides a three-dimensional rack-type drilling tool with replaceable blade Figure 2 .

[0023] Figure 3 The utility model provides a cross-sectional view of a frame-type drilling tool with replaceable blades.

[0024] Figure 4 The utility model discloses an exploded view of a frame-type drilling tool with replaceable blades.

[0025] In the figure: 1-drill bit, 2-chip groove, 3-assembly groove one, 4-cutting tool one, 5-assembly groove two, 6-cutting tool two, 7-connector. DETAILED DESCRIPTION

[0026] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0027] like Figures 1 to 4 As shown, the embodiment of the utility model specifically provides a frame-type drilling knife with replaceable blades, comprising:

[0028] The drill bit 1 is provided with a hollow structure;

[0029] A chip discharge groove 2 is circumferentially formed on the outer wall of the drill bit 1 and penetrates the bottom end surface of the drill bit 1, and is used to discharge the drilled nylon sleeve chips and to facilitate heat dissipation;

[0030] There are two assembly grooves 3, which are correspondingly opened at the upper part of one side wall of any two chip removal grooves 2, and the two assembly grooves 3 are opened at different heights, so that according to nylon sleeves of different lengths, a suitable assembly position can be selected to facilitate cutting.

[0031] A cutting blade 4 is provided, which can be detachably locked on an assembly groove 3 at any position by a fastening screw; the thickness of the top of the nylon sleeve can be cut by the cutting blade 4.

[0032] The second assembly groove 5 is arranged in three and is correspondingly opened at the bottom of a side wall of each chip removal groove 2;

[0033] The cutting knife 26 is detachably locked on the assembly groove 25 by a fastening screw, and the upper and lower end surfaces of the cutting knife 26 are provided with cutting edges. The driving force is provided by the drilling machine to drive the cutting knife 26 to rotate at a high speed, and the inner diameter of the bottom of the nylon sleeve is cut by the cutting knife 26.

[0034] The top end of the drill bit 1 also includes an integrally formed connector 7, and the connector 7 also includes an axially opened conical connecting hole, which can be quickly disassembled and assembled with the transmission connecting shaft on the drilling machine through the conical connecting hole.

[0035] The number of the chip removal grooves 2 opened in the circumferential direction is three, and the chip removal grooves 2 are arranged in a curved spiral groove structure, thereby improving the chip removal efficiency of the nylon sleeve chip wire.

[0036] The second assembly groove 5 is arranged in an L-shaped groove structure, and the first assembly groove 3 and the second assembly groove 5 also include fastening screw holes for tightening the fastening screws, so as to facilitate the replacement of the first cutting blade 4 and the second cutting blade 6 during later maintenance.

[0037] The fastening screw is an anti-loosening screw, which further strengthens the fastening degree of the cutting blade 1 4 and the cutting blade 2 6 during installation to avoid loosening.

[0038] The cutting blade 1 4 and the cutting blade 2 6 are both made of high-hardness alloy blades and have high temperature resistance.

[0039] The cutting blade 2 6 is a parallelogram structure. When the cutting blade 2 6 is installed on the assembly groove, the angle between the bottom blade surface of the cutting blade 2 6 and the radial end surface of the drill bit 1 is 3 to 10 degrees, and specifically preferably 5 degrees; that is, if the position of the cutting blade 2 6 on the assembly groove 2 5 is installed on the front side, the blade surface is low inside and high outside, and if it is reversed, that is, installed on the reverse side, the blade surface is high outside and low inside (relative to the radial inner and outer sides of the drill bit 11 as a reference direction), thereby improving the cutting effect of the cutting blade 2 6 on the nylon sleeve drill.

[0040] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A rack-type drilling tool with replaceable blade, characterized in that: include: The drill bit (1) is provided in a hollow structure; A chip removal groove (2) is circumferentially formed on the outer wall of the drill bit (1) and penetrates the bottom end surface of the drill bit (1); The assembly grooves (3) are arranged in two and are correspondingly opened at the upper part of the side wall of any two of the chip removal grooves (2), and the two assembly grooves (3) are opened at different heights; A cutting blade (4) is provided with a fixing screw which can be removably locked on the assembly groove (3) at any position; The second assembly groove (5) is arranged in three pieces and is correspondingly opened at the bottom of a side wall of each of the chip removal grooves (2); The second cutting blade (6) is detachably locked on the second assembly groove (5) by means of a fastening screw, and the upper and lower end surfaces of the second cutting blade (6) are both provided with cutting edges.

2. A frame-mounted drill with replaceable blades as claimed in claim 1, characterized in that: The top end of the drill bit (1) further comprises an integrally formed connecting head (7), and the connecting head (7) further comprises an axially opened conical connecting hole.

3. A frame-type drilling tool with replaceable blade as claimed in claim 1, characterized in that: The number of the chip removal grooves (2) opened in the circumferential direction is three, and the chip removal grooves (2) are arranged in a curved spiral groove structure.

4. A frame-type drilling tool with replaceable blade as claimed in claim 1, characterized in that: The second assembly groove (5) is arranged in an L-shaped groove structure, and the first assembly groove (3) and the second assembly groove (5) also include fastening screw holes for tightening the fastening screws.

5. A frame-type drilling tool with replaceable blade as claimed in claim 4, characterized in that: The fastening screw is a locking screw.

6. A frame-type drilling tool with replaceable blade as claimed in claim 1, characterized in that: The cutting blade one (4) and the cutting blade two (6) are both made of high-hardness alloy blades.

7. A frame-type drilling tool with replaceable blade as claimed in claim 1, characterized in that: The second cutting blade (6) is a parallelogram structure.

8. A frame-type drilling tool with replaceable blades as claimed in any one of claims 1 to 7, characterized in that: When the second cutting blade (6) is installed on the assembly groove, the angle between the bottom blade surface of the second cutting blade (6) and the radial end surface of the drill bit (1) is 3 to 10 degrees.

Images