A hub bolt hole drilling tool based on quick change of blades

Abstract

The application discloses a hub bolt hole drilling tool based on quick blade replacement and belongs to the technical field of drilling tool replacement. Mainly comprising a tool body, the tool body is composed of an integrated structure of a drill body and a handle, a chip groove for discharging iron chips is formed in the drill body, a drill tip is installed at the end of the drill body, a first blade and a second blade are arranged at the two sides of the end of the drill body, a locking unit is arranged between the first blade, the second blade and the drill body, the locking unit comprises a locking sleeve fixed on the end side of the drill body, a locking groove is formed in the inner wall of the locking sleeve, a locking rod is slidably arranged in the locking sleeve, a pressing table for pressing the blade is arranged at the top end of the locking rod, a ball body matched with the locking groove is telescopically arranged on the inner wall of the locking rod, a lifting rod is slidably arranged in the locking rod, and a resisting block is arranged on the lifting rod. The hub bolt hole drilling tool based on quick blade replacement solves the problem that the rotary reverse shock force in the drilling operation easily affects the single bolt fastening blade.

Description

Technical Field

[0001] This application relates to the field of drilling tool changing technology, specifically a wheel hub bolt hole drilling tool based on quick-change inserts. Background Technology

[0002] Wheel hub bolt hole drilling refers to a metal cutting process that uses special cutting tools to machine high-precision tapered or cup-shaped hole systems for installing wheel bolts on automobile wheel hub blanks.

[0003] In existing drilling tools, disposable drilling tools are mainly used, which are mainly composed of a tool body and inserts. The inserts are easy to replace after long-term use. However, the inserts are mainly fixed by bolts. During the process of locking the inserts with the screw, due to the long-term drilling operation of the tool on the workpiece, the shock force during drilling can cause the bolts to loosen or break, thereby affecting the stability of the inserts and the drilling accuracy. Therefore, it is necessary to provide a hub bolt hole drilling tool based on quick insert change to solve the above problems.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a hub bolt hole drilling tool based on quick-change inserts, which solves the problem that the rotational back shock force in drilling operations can easily affect the single bolt fastening insert.

[0006] To achieve the above objectives, this application provides the following technical solution: a hub bolt hole drilling tool based on quick-change inserts, comprising a tool body, the tool body being an integral structure composed of a drill body and a shank, the drill body having a chip discharge groove for discharging iron chips, a drill tip being installed at the end of the drill body, a first insert and a second insert being respectively provided on both sides of the end of the drill body, a locking unit being provided between the first insert and the second insert and the drill body, the locking unit comprising a locking sleeve threaded to the end side of the drill body, a locking groove being provided on the inner wall of the locking sleeve, a locking rod being slidably provided inside the locking sleeve, a pressure plate being provided at the top of the locking rod for holding the insert, a ball adapted to the locking groove being telescopically installed on the inner wall of the locking rod, a lifting rod being slidably installed inside the locking rod, and a stop block being installed on the lifting rod.

[0007] Preferably, the top end of the lifting rod is threadedly connected to the inner wall of the pressure plate of the locking rod.

[0008] Preferably, the outer wall of the abutment is wedge-shaped, and the wedge surface of the abutment is adapted to abut against the sphere.

[0009] Preferably, the blade body has an internal cooling hole that extends through the blade body.

[0010] Preferably, a positioning pin is provided between the drill tip and the drill body.

[0011] Preferably, the bottom end face of the locking sleeve is adapted to the outer wall of the left end of the drill body.

[0012] The beneficial effects of this application are as follows: This application provides a hub bolt hole drilling tool based on quick-change inserts. Through the threaded engagement between the lifting rod and the locking rod, the lifting rod is suitable for moving up and down, and indirectly drives the abutment block to move synchronously. When the abutment block and the ball come into contact, the wedge surface of the abutment block squeezes the ball, causing the ball to be stuck in the locking groove, thereby achieving the purpose of stably locking the first and second inserts. When the abutment block is in the ball, the ball is suitable for retracting inward toward the locking rod. Only by rotating the lifting rod is it possible to quickly disengage the locking rod from the locking sleeve, and the problem of rotational back shock force in drilling operations easily affecting the single bolt fastening insert is solved.

[0013] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0015] Figure 1 This is an overall schematic diagram of a hub bolt hole drilling tool based on quick-change inserts in this application;

[0016] Figure 2 for Figure 1 A planar schematic diagram of the central blade body;

[0017] Figure 3 for Figure 1 A cross-sectional view of the central locking unit;

[0018] The following are the labeling elements in the figure:

[0019] 1. Tool body; 11. Drill body; 111. Chip removal groove; 12. Clamping shank; 13. Internal cooling hole; 2. First cutting tool; 3. Second cutting tool; 4. Drill tip; 41. Positioning pin; 5. Locking unit; 51. Locking sleeve; 511. Locking groove; 52. Locking rod; 521. Pressure table; 53. Ball; 54. Lifting rod; 541. Abutment block. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] like Figures 1-2 As shown, this application provides a hub bolt hole drilling tool based on quick-change inserts, including a tool body 1. The tool body 1 is an integral structure composed of a drill body 11 and a shank 12. The drill body 11 has a chip discharge groove 111 for discharging iron chips, and an internal cooling hole 13 is provided on the tool body 1. The internal cooling hole 13 extends through the tool body 1, wherein the inlet of the internal cooling hole 13 is located at the end of the shank 12, and the outlet of the internal cooling hole 13 is located at the end of the drill body 11.

[0023] A drill tip 4 for drilling is installed at the end of the drill body 11, and a positioning pin 41 is provided between the drill tip 4 and the drill body 11. A first cutting tool 2 and a second cutting tool 3 for drilling are respectively provided on both sides of the end of the drill body 11.

[0024] like Figure 1 and Figure 3 As shown, a locking unit 5 for locking the blades is provided between the first blade 2 and the second blade 3 and the drill body 11. The locking unit 5 includes a locking sleeve 51 threadedly installed on the end side of the drill body 11, and the bottom end face of the locking sleeve 51 is adapted to the outer wall of the left end of the drill body 11 to seal the hole on the end side of the drill body 11.

[0025] A locking groove 511 is provided on the inner wall of the locking sleeve 51. A locking rod 52 is slidably provided inside the locking sleeve 51. A pressure table 521 for pressing and holding the blade is provided at the top of the locking rod 52. A ball 53 adapted to the locking groove 511 is telescopically installed on the inner wall of the locking rod 52. The ball 53 is adapted to extend out of the outer wall of the locking rod 52 or retract into the locking rod 52 under the action of external force.

[0026] Meanwhile, a lifting rod 54 is slidably installed inside the locking rod 52. The top end of the lifting rod 54 is threadedly connected to the inner wall of the pressure plate 521 of the locking rod 52, thereby making the lifting rod 54 suitable for moving up and down and securing the locking rod 52. Furthermore, a stop block 541 is installed on the lifting rod 54, and the outer wall of the stop block 541 is wedge-shaped. The wedge surface of the stop block 541 is suitable for abutting against the ball 53.

[0027] When it is necessary to fasten the first blade 2 or the second blade 3, first rotate the lifting rod 54 so that the lifting rod 54 moves upward. At this time, the abutment block 541 is above the ball 53. Then insert the locking rod 52 into the locking sleeve 51. At this time, the ball 53 retracts into the locking sleeve 51, and the pressure plate 521 of the locking rod 52 abuts against the first blade 2.

[0028] After the ball 53 is aligned with the locking groove 511, rotate the lifting rod 54 so that the lifting rod 54 drives the abutment block 541 to move downward. At this time, the wedge surface of the abutment block 541 abuts against the ball 53 and squeezes the ball 53 to extend out of the outer wall of the locking rod 52, and then it is locked into the locking groove 511 to complete the locking of the first blade 2.

[0029] When it is necessary to replace the first blade 2 or the second blade 3, first rotate the lifting rod 54 to move upward, and drive the stop block 541 to move synchronously. After the stop block 541 moves to the top of the ball 53, pull the locking rod 52. The ball 53 is resisted by the inner wall of the locking groove 511 and retracts into the locking rod 52. The ball 53 is disengaged from the locking groove 511, thereby separating the locking rod 52 from the locking sleeve 51 and realizing the disassembly of the first blade 2.

[0030] In summary, the threaded engagement between the lifting rod 54 and the locking rod 52 allows the lifting rod 54 to move up and down, indirectly driving the abutment block 541 to move synchronously. When the abutment block 541 contacts the ball 53, the wedge surface of the abutment block 541 presses against the ball 53, causing the ball 53 to be inserted into the locking groove 511, thus achieving the purpose of stably locking the first cutting tool 2 and the second cutting tool 3. When the abutment block 541 is in the ball 53, the ball 53 is suitable for retracting into the locking rod 52. Only by rotating the lifting rod 54 can the locking rod 52 be quickly disengaged from the locking sleeve 51, and the problem of the rotational back shock force in drilling operations easily affecting the single bolt fastening of the cutting tool is solved.

[0031] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations are possible for those skilled in the art. Any improvements and modifications made within the spirit and principles of this application, without departing from its principles, should also be considered within the scope of protection of this application.

Claims

1. A hub bolt hole drilling tool based on quick-change inserts, comprising a tool body (1), wherein the tool body (1) is an integral structure composed of a drill body (11) and a shank (12), wherein the drill body (11) is provided with a chip discharge groove (111) for discharging iron chips, and a drill tip (4) is installed at the end of the drill body (11). The drill body (11) is provided with a first blade (2) and a second blade (3) on both sides of its end, and a locking unit (5) is provided between the first blade (2) and the second blade (3) and the drill body (11). The drill body (11) is characterized by the following: The locking unit (5) includes a locking sleeve (51) that is threaded to the end side of the drill body (11), and a locking groove (511) is provided on the inner wall of the locking sleeve (51). A locking rod (52) is slidably provided inside the locking sleeve (51). A pressure plate (521) for pressing the blade is provided at the top of the locking rod (52). A ball (53) adapted to the locking groove (511) is telescopically installed on the inner wall of the locking rod (52). A lifting rod (54) is slidably installed inside the locking rod (52). A stop block (541) is installed on the lifting rod (54).

2. The hub bolt hole drilling tool based on quick-change inserts according to claim 1, characterized in that: The top end of the lifting rod (54) is threadedly connected to the inner wall of the pressure plate (521) of the locking rod (52).

3. A hub bolt hole drilling tool based on quick-change inserts according to claim 2, characterized in that: The outer wall of the abutment (541) is wedge-shaped, and the wedge surface of the abutment (541) is adapted to abut against the sphere (53).

4. A hub bolt hole drilling tool based on quick-change inserts according to claim 3, characterized in that: The blade body (1) is provided with an internal cooling hole (13), which extends through the blade body (1).

5. A hub bolt hole drilling tool based on quick-change inserts according to claim 4, characterized in that: A positioning pin (41) is provided between the drill tip (4) and the drill body (11).

6. A hub bolt hole drilling tool based on quick-change inserts according to claim 5, characterized in that: The bottom end face of the locking sleeve (51) is adapted to the outer wall of the left end of the drill body (11).

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