Deep hole drill for machining intermediate shaft of automobile reduction gearbox

Abstract

The utility model belongs to the deep hole drilling technical field especially, it is a kind of deep hole drill for machining middle axle of automobile reduction gearbox, to the existing in use, since the heat generated by drill head and hole wall friction, it is inconvenient to carry out heat dissipation, leading to drill head overheating influence processing quality problem, present and propose following scheme, including drill fixed handle, the one end of drill fixed handle is connected with drill head body, the other end of drill fixed handle is connected with water inlet pipe, the inside of drill fixed handle is equipped with cooling mechanism for cooling drill head, the one side of cooling mechanism is equipped with quick release mechanism for the disassembly of drill head. The utility model is sprayed by the water injection hole of drill head body terminal, drill head body is in hole, so that the water that sprays will pass through the chip flute on drill head body and be discharged from inside to outside, to further cool drill head body, and can flush out the impurity adhered to the outer surface of drill head body.

Description

Technical Field

[0001] This utility model relates to a deep hole drill, specifically a deep hole drill for machining the intermediate shaft of an automotive gearbox, belonging to the field of deep hole drilling technology. Background Technology

[0002] Deep hole drilling is a crucial process in the machining of intermediate shafts for automotive gearboxes. Due to its ability to handle deep and precise holes, deep hole drilling plays a key role in the automotive manufacturing industry, particularly in the production of complex mechanical components such as gearboxes. A deep hole drill is a precision machine tool specifically designed for machining applications requiring deep drilling, high precision, and high surface finish. Compared to ordinary drilling machines, deep hole drills can achieve greater drilling depth, higher drilling accuracy, and better surface quality.

[0003] In existing technologies, such as the deep hole drill bit disclosed in CN209736717U, the drill bit includes: a cutting tool, a drill rod, and a drill shank. The diameter of the drill rod is smaller than the diameter of the cutting tool. The lower end of the drill shank is connected to the upper end of the drill rod, and the lower end of the drill rod is connected to the upper end of the cutting tool. At least one guide boss is protruding from the circumferential outer surface of the drill rod, and the diameter of the guide boss is the same as the diameter of the cutting tool. Through the interaction between the guide boss and the inner wall of the drilled deep hole, the guide boss's minimal contact surface friction with the hole wall achieves a straightening effect on the drill rod. This not only straightens the drill rod and improves drilling accuracy but also avoids adverse effects such as large-area friction between the drill rod and the hole wall and swaying due to excessive drill rod length, thereby improving the quality and accuracy of drilling.

[0004] Although the above-mentioned technical solution achieves the effect of straightening the drill rod by the mutual cooperation between the guide boss and the inner wall of the drilled deep hole and the friction between the guide boss's extremely small contact surface and the hole wall, thus improving the drilling accuracy, the friction between the drill bit and the hole wall generates heat during use, which is inconvenient to dissipate, leading to overheating of the drill bit and affecting the processing quality. In view of this, a deep hole drill for machining the intermediate shaft of an automotive gearbox is provided to overcome the above-mentioned defects. Utility Model Content

[0005] This invention addresses the problem that, during use, the friction between the drill bit and the hole wall generates heat, which is difficult to dissipate, leading to overheating of the drill bit and affecting processing quality. It provides a deep hole drill for machining the intermediate shaft of an automotive gearbox.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a deep hole drill for machining the intermediate shaft of an automotive gearbox, comprising a drill bit fixing shank, one end of which is connected to a drill bit body, and the other end of which is connected to a water inlet pipe. The drill bit fixing shank is provided with a cooling mechanism for cooling the drill bit, and a quick-release mechanism for disassembling the drill bit is provided on one side of the cooling mechanism. The drill bit fixing shank is provided with a conveying mechanism for conveying coolant on the right side inside.

[0007] The cooling mechanism includes a sealing ring, which is fixed inside the drill bit retaining shank. A connector that is fixedly connected to the drill bit body is connected to the left side of the sealing ring, and a flow cavity is formed inside the connector.

[0008] As a further improvement of this utility model, the drill bit body has two water spray holes at its end that are connected to the flow cavity.

[0009] As a further improvement of this utility model: the quick-release mechanism includes a mounting groove, which is formed on the inner wall of the drill bit fixing shank.

[0010] As a further embodiment of this utility model: a fixing bolt is installed on the outer wall of the drill bit fixing shank, and the end of the fixing bolt is inserted into a fixing hole opened on the connector.

[0011] As a further improvement of this utility model: the outer surface of the drill bit fixing shank is provided with several anti-slip textures, and the outer wall of the drill bit body is provided with a chip removal groove.

[0012] As a further embodiment of this utility model: the conveying mechanism includes a limiting member, which is fixed to the right side inside the drill bit fixing shank, and a limiting groove is formed inside the limiting member.

[0013] As a further embodiment of this utility model: the inner part of the limiting groove is rotatably connected to a fixing ring that is fixedly connected to the end of the water inlet pipe, and the outer surface of the fixing ring is fitted with a fixing bearing that is fixedly connected to the drill bit fixing shank.

[0014] The beneficial effects of this utility model are as follows: water is sprayed out through the spray hole at the end of the drill bit body, and the drill bit body is inside the hole, so that the sprayed water will be discharged from the inside to the outside through the chip removal groove on the drill bit body, thereby cooling the drill bit body and flushing out the impurities adhering to the outer surface of the drill bit body; the limiting groove in the limiting member, under the action of the fixing ring, can prevent the water inlet pipe from falling off; the fixed bearing set on the water inlet pipe can prevent the water inlet pipe from rotating when the drill bit fixing shank rotates, ensuring the normal delivery of coolant. Attached Figure Description

[0015] Figure 1This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the drill bit fixing shank of this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the drill bit fixing shank of this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0019] In the diagram: 1. Drill bit retaining shank; 2. Drill bit body; 3. Water inlet pipe; 4. Sealing ring; 41. Connecting piece; 42. Flow chamber; 5. Water spray hole; 6. Mounting groove; 61. Fixing bolt; 62. Fixing hole; 7. Anti-slip texture; 8. Chip removal groove; 9. Limiting piece; 91. Limiting groove; 92. Retaining ring; 10. Fixed bearing. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0021] like Figures 1 to 4 As shown, a deep hole drill for machining the intermediate shaft of an automotive gearbox includes a drill bit fixing shank 1, one end of which is connected to a drill bit body 2, and the other end of which is connected to a water inlet pipe 3. The drill bit fixing shank 1 is provided with a cooling mechanism for cooling the drill bit, and a quick-release mechanism for disassembling the drill bit is provided on one side of the cooling mechanism. The drill bit fixing shank 1 is provided with a conveying mechanism for conveying coolant on the right side inside.

[0022] The cooling mechanism includes a sealing ring 4, which is fixed inside the drill bit retaining shank 1. A connector 41, which is fixedly connected to the drill bit body 2, is connected to the left side of the sealing ring 4. A flow cavity 42 is formed inside the connector 41. Two water spray holes 5, communicating with the flow cavity 42, are formed at the end of the drill bit body 2. The quick-release mechanism includes a mounting groove 6, which is formed on the inner wall of the drill bit retaining shank 1. A fixing bolt 61 is installed on the outer wall of the drill bit retaining shank 1. The end of the fixing bolt 61 is inserted into a fixing hole 62 formed on the connector 41. External coolant enters the drill bit retaining shank 1 through the water inlet pipe 3 and flows through the connector 41. The flow cavity 42 inside the drill bit body 2 enters the interior of the drill bit body 2 and is sprayed out through the water spray hole 5 at the end of the drill bit body 2. At this time, the drill bit body 2 is in the hole, so that the sprayed water will be discharged from the inside to the outside through the chip removal groove 8 on the drill bit body 2, thereby cooling the drill bit body 2 and flushing out the impurities adhering to the outer surface of the drill bit body 2. The sealing ring 4 set in the mounting groove 6 can play a sealing role, thereby reducing the possibility of leakage. By unscrewing the fixing bolt 61, the fixing bolt 61 and the fixing hole 62 are separated, and the limitation on the connecting part 41 is released. This allows the drill bit body 2 and the drill bit fixing shank 1 to be disassembled for easy replacement. Example 2

[0023] In addition to all the technical features in Embodiment 1, this embodiment also includes: a plurality of anti-slip textures 7 on the outer surface of the drill bit fixing shank 1; a chip removal groove 8 on the outer wall of the drill bit body 2; and a conveying mechanism including a limiting member 9, which is fixed to the right side inside the drill bit fixing shank 1. A limiting groove 91 is provided inside the limiting member 9, and a fixing ring 92 that is fixedly connected to the end of the water inlet pipe 3 is rotatably connected inside the limiting groove 91. A fixing bearing 10 that is fixedly connected to the drill bit fixing shank 1 is sleeved on the outer surface of the fixing ring 92. Through the limiting groove 91 inside the limiting member 9, the water inlet pipe 3 can be prevented from falling off under the action of the fixing ring 92. Through the fixing bearing 10 provided on the water inlet pipe 3, the water inlet pipe 3 will not be rotated when the drill bit fixing shank 1 rotates, thus ensuring the normal delivery of coolant.

[0024] Working Principle: Before using this deep hole drill for machining the intermediate shaft of an automotive gearbox, the drill bit is first installed. The drill bit fixing shank 1 is connected to the output end of the drive equipment. The anti-slip texture 7 on the outer surface of the drill bit fixing shank 1 provides anti-slip properties, thereby improving the stability of the drill bit. The water inlet pipe 3 on the drill bit fixing shank 1 is connected to the external water supply pipe. During use, the equipment drives the drill bit fixing shank 1 to rotate, which in turn drives the drill bit body 2 to rotate, machining the workpiece. The chip removal groove 8 on the outer surface of the drill bit body 2 can discharge the waste chips generated during workpiece machining to the outside. The external coolant enters the drill bit fixing shank 1 through the water inlet pipe 3, enters the drill bit body 2 through the flow cavity 42 in the connector 41, and is sprayed out through the water spray hole 5 at the end of the drill bit body 2. When the drill bit body 2 is inside the hole, the sprayed water will be discharged from the inside to the outside through the chip removal groove 8 on the drill bit body 2, thereby cooling the drill bit body 2 and flushing out impurities adhering to the outer surface of the drill bit body 2. The sealing ring 4 set in the mounting groove 6 can play a sealing role, thereby reducing the possibility of leakage. By unscrewing the fixing bolt 61, the fixing bolt 61 and the fixing hole 62 are separated, and the limitation on the connecting part 41 is released. This allows the drill bit body 2 and the drill bit fixing shank 1 to be disassembled for easy replacement. Moreover, through the limiting groove 91 in the limiting part 9, under the action of the fixing ring 92, the water inlet pipe 3 can be prevented from falling off. Through the fixed bearing 10 set on the water inlet pipe 3, the rotation of the drill bit fixing shank 1 will not drive the water inlet pipe 3 to rotate, ensuring the normal delivery of coolant.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0026] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A deep hole drill for machining intermediate shaft of automobile reduction gearbox, comprising drill fixed handle (1), characterized in that: One end of the drill fixed handle (1) is connected with the drill body (2), the other end of the drill fixed handle (1) is connected with the water inlet pipe (3), the inside of the drill fixed handle (1) is equipped with cooling mechanism for cooling drill, one side of the cooling mechanism is equipped with quick release mechanism for disassembling drill, the right side of the inside of the drill fixed handle (1) is equipped with conveying mechanism for conveying cooling liquid. The cooling mechanism comprises a sealing ring (4), the sealing ring (4) is fixed in the inside of the drill fixed handle (1), the left side of the sealing ring (4) is connected with the connecting piece (41) fixedly connected with the drill body (2), the inside of the connecting piece (41) is provided with flow cavity (42).

2. The deep hole drill for machining the intermediate shaft of the automobile reduction gearbox according to claim 1, characterized in that: The end of the drill body (2) is provided with two water injection holes (5) communicated with the flow cavity (42).

3. The deep hole drill for machining the intermediate shaft of the automobile reduction gearbox according to claim 1, characterized in that: The quick release mechanism comprises an installation slot (6), the installation slot (6) is arranged in the inner wall of the drill fixed handle (1).

4. The deep hole drill for machining the intermediate shaft of the automobile reduction gearbox according to claim 3, characterized in that: The outer wall of the drill fixed handle (1) is provided with a fixing bolt (61), the end of the fixing bolt (61) is insertedly connected with the fixing hole (62) arranged on the connecting piece (41).

5. The deep hole drill for machining intermediate shaft of automobile reduction gearbox according to claim 1, characterized in that: The outer surface of the drill fixed handle (1) is provided with a plurality of anti-skid lines (7), and the outer wall of the drill body (2) is provided with a chip removal groove (8).

6. The deep hole drill for machining intermediate shaft of automobile reduction gearbox according to claim 1, characterized in that: The conveying mechanism comprises a limiting piece (9), the limiting piece (9) is fixed to the right side of the inside of the drill fixed handle (1), and the inside of the limiting piece (9) is provided with a limiting groove (91).

7. The deep hole drill for machining the intermediate shaft of the automobile reduction gearbox according to claim 6, characterized in that: The inside of the limiting groove (91) is rotatably connected with the fixed ring (92) fixedly connected with the end of the water inlet pipe (3), and the outer surface of the fixed ring (92) is sleeved with the fixed bearing (10) fixedly connected with the drill fixed handle (1).

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