A tool shank connecting structure of a welding type single blade gun drill

Abstract

The utility model relates to the technical field of cutter bar connection, disclose a kind of welded single-edge gun drill's cutter bar connecting structure, including hollow connecting column, the cutter seat is fixedly connected with one side of hollow connecting column, the cutter seat side wall is fixedly connected with clamping post, the anti-skid plate is slidably connected in the cutter seat inner wall, the cutter seat bottom is provided with outer support component;The outer support component includes connecting block, the connecting block side wall is fixedly connected in the cutter seat inner wall, the connecting block one end is fixedly connected with second hollow column, the second hollow column inner wall is slidably connected with sliding disc, the sliding disc top is fixedly connected with first connecting column.In the utility model, when installing tool rest by hollow connecting column, utilize the stress sliding of anti-skid plate, drive bottom first connecting column and sliding disc to move, compress second spring, spring rebound pushes anti-skid plate to adhere to tool rest inner wall, solve the vibration or deviation problem caused by unstable connection between tool rest and cutter seat, improve the overall stability of cutter bar structure.

Description

Technical Field

[0001] This utility model relates to the field of tool holder connection technology, and in particular to a tool holder connection structure for a welded single-edged gun drill. Background Technology

[0002] In modern precision machining, welded tool systems are widely used in high-precision drilling operations due to their excellent strength and stability, especially in gun drills, where the connection stability between the tool holder and the tool head is crucial. As machining accuracy requirements continue to increase, traditional tool holder connection structures often cannot effectively resist vibrations and offsets generated during machining, thus affecting the overall machining results.

[0003] Currently, common welded single-edged gun drills typically employ a single fixed connection method for the tool holder, such as threaded connection or fastener fixation. These technologies rely on directly fixing the tool holder and tool holder together via mechanical structures to ensure the tool maintains a certain level of stability during machining. The advantage of this type of structure is its relatively simple manufacturing process and low cost. However, because it relies solely on fasteners or threaded connections, it cannot effectively resist vibrations and external forces that occur during machining, leading to instability in the connection between the tool holder and tool holder, which can easily affect machining accuracy.

[0004] While existing welded tool holder connection structures have addressed the tool fixing problem to some extent, the lack of effective stability design still leads to loosening or instability in the connection between the tool holder and the tool support. Especially in complex machining environments, this instability generates vibration, causing tool position shifts during machining and consequently affecting machining accuracy. This problem is particularly pronounced in high-precision drilling operations, and the inability to effectively improve connection stability has become a major bottleneck affecting machining quality. Therefore, a welded single-edged gun drill tool holder connection structure is proposed to solve these problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a welded single-edged gun drill bar connection structure, which aims to improve the problem of poor connection stability between the tool holder and the tool support in the prior art, which leads to vibration or displacement during the machining process and thus affects the machining accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A welded single-edged gun drill bar connection structure includes a hollow connecting column, a tool holder fixedly connected to one side of the hollow connecting column, a locking pin fixedly connected to the side wall of the tool holder, an anti-slip plate slidably connected to the inner wall of the tool holder, and an external support assembly provided at the bottom of the tool holder. The external support assembly includes a connecting block, the side wall of which is fixedly connected to the inner wall of the tool holder. A second hollow column is fixedly connected to one end of the connecting block. A sliding disk is slidably connected to the inner wall of the second hollow column. A first connecting column is fixedly connected to the top of the sliding disk. One end of the first connecting column is fixedly connected to the bottom of the anti-slip plate. A rebound assembly is provided at the bottom of the sliding disk.

[0007] As a further description of the above technical solution: The rebound assembly includes a second spring, one end of which is fixedly connected to the inner wall of the second hollow column, and the other end of which is fixedly connected to the bottom of the sliding disk.

[0008] As a further description of the above technical solution: A drill rod is slidably connected inside the hollow connecting column, and a drill bit is fixedly connected to one end of the drill rod.

[0009] As a further description of the above technical solution: A slotted ring is fixedly connected to the inner wall of the hollow connecting column, and a retaining plate is slidably connected to the inner wall of the slotted ring.

[0010] As a further description of the above technical solution: The side wall of the clamping plate is fixedly connected to the outer wall of the drill pipe, and the side wall of the clamping plate is slidably connected to the inside of the hollow connecting column.

[0011] As a further description of the above technical solution: The sidewall of the slotted ring is fixedly connected to a first hollow column, and the sidewall of the first hollow column is fixedly connected to the inside of the hollow connecting column.

[0012] As a further description of the above technical solution: A ball is slidably connected to the inner wall of the first hollow column, and the outer wall of the ball is slidably connected to the side wall of the plate.

[0013] As a further description of the above technical solution: A first spring is provided inside the first hollow column. One end of the first spring is fixedly connected to the inner wall of the first hollow column, and the other end of the first spring is fixedly connected to the outer wall of the ball.

[0014] This utility model has the following beneficial effects: 1. In this utility model, when the tool holder is installed on the hollow connecting column, the anti-slip plate will slide under force, causing it to move the bottom first connecting column and sliding plate. At the same time, the second spring is compressed during the process of the sliding plate being stressed, and then the second spring rebounds and pushes the anti-slip plate, so that its side wall is close to the inside of the tool holder. This achieves the effect of increasing the connection stability of the hollow connecting column, solving the problem of poor connection stability between the tool holder and the tool support, which causes vibration or displacement during processing, thereby affecting the processing accuracy, and improving the stability of the tool holder connection structure.

[0015] 2. In this utility model, rotating the drill rod drives the outer wall clamping plate to slide on the inner wall of the hollow groove ring. After rotating to the designated position, the drill rod can be pulled out of the hollow connecting column. At the same time, during the process of the clamping plate being subjected to force, it is released from the force compression of the first spring. Then, the compression of the first spring drives the clamping ball to move under force, making it slide on the inner wall of the first hollow column, thus achieving the effect of quick disassembly of the drill rod. This solves the problem that the lack of quick disassembly function means that more time is needed for disassembly and installation each time the tool is replaced or maintenance is performed, and improves the convenience of the tool rod connection structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the tool holder connection structure of a welded single-edged gun drill proposed in this utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the tool holder of a welded single-edged gun drill according to the present invention. Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 A cross-sectional schematic diagram of the hollow connecting column structure of the tool holder connection structure of a welded single-edged gun drill proposed in this utility model. Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0017] Legend: 1. Drill rod; 2. Drill bit; 3. Hollow connecting column; 4. Tool holder; 5. Clamping column; 6. Hollow groove ring; 7. Clamping plate; 8. First hollow column; 9. First spring; 10. Clamping ball; 11. First connecting column; 12. Second hollow column; 13. Sliding plate; 14. Second spring; 15. Anti-slip plate; 16. Connecting block. Detailed Implementation

[0018] 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.

[0019] Reference Figures 1-3 The present invention provides an embodiment of a welded single-edged gun drill tool holder connection structure, including a hollow connecting column 3, a tool holder 4 fixedly connected to one side of the hollow connecting column 3, a retaining pin 5 fixedly connected to the side wall of the tool holder 4, and an anti-slip plate 15 slidably connected to the inner wall of the tool holder 4. The anti-slip plate 15 cooperates with the first connecting column 11 to perform axial sliding movement. The anti-slip plate 15 is kept in close contact with the inner wall of the tool holder by the rebound force of the second spring 14, thereby achieving the effect of dynamically compensating for assembly gaps and suppressing processing vibration. An external support assembly is provided at the bottom of the tool holder 4. The external support assembly includes a connecting block 16, the side wall of which is fixedly connected to the inner wall of the tool holder 4. One end of the connecting block 16 is fixedly connected to a second hollow column 12, and the inner wall of the second hollow column 12 is slidably connected to a sliding disk 13. The sliding disk 13 and the second hollow column 12 form a precision sliding pair, which converts the contact pressure of the anti-slip plate 15 into a uniform spring load to ensure uniform pressure distribution on the friction surface. This is a well-known mechanical structure design principle and will not be elaborated further here. The top of the sliding disk 13 is fixedly connected to a first connecting column 11, one end of which is fixedly connected to the bottom of the anti-slip plate 15. A spring-loaded assembly is provided at the bottom of the sliding disk 13. The spring-loaded assembly includes a second spring 14, one end of which is fixedly connected to the inner wall of the second hollow column 12, and the other end of which is fixedly connected to the bottom of the sliding disk 13. The external support assembly consists of the connecting block 16, the second hollow column 12, the sliding disk 13, and the spring-loaded assembly, forming an automatic centering system for the tool holder mounting position, which improves the coaxiality of the tool clamping. This will not be elaborated further here.

[0020] Reference Figure 1 , Figure 4 and Figure 5A drill rod 1 is slidably connected inside the hollow connecting column 3. A drill bit 2 is fixedly connected to one end of the drill rod 1. A slotted ring 6 is fixedly connected to the inner wall of the hollow connecting column 3. A clamping plate 7 is slidably connected to the inner wall of the slotted ring 6. The side wall of the clamping plate 7 is fixedly connected to the outer wall of the drill rod 1. The side wall of the clamping plate 7 is slidably connected to the inside of the hollow connecting column 3. A first hollow column 8 is fixedly connected to the side wall of the slotted ring 6. The side wall of the first hollow column 8 is fixedly connected to the inside of the hollow connecting column 3. A chuck ball 10 is slidably connected to the inner wall of the first hollow column 8. The chuck ball 10 cooperates with the clamping plate 7 to perform radial limiting movement. Automatic locking / unlocking is achieved by the elastic force of the first spring 9, which achieves the effect of quickly locking the drill rod 1 and single-key guided disassembly. The outer wall of the chuck ball 10 is slidably connected to the side wall of the clamping plate 7. A first spring 9 is set inside the first hollow column 8. One end of the first spring 9 is fixedly connected to the inner wall of the first hollow column 8, and the other end of the first spring 9 is fixedly connected to the outer wall of the chuck ball 10.

[0021] Working principle: When installing the tool holder, the tool holder presses against the anti-slip plate 15, causing it to slide along the inner wall of the tool holder 4. The sliding of the anti-slip plate 15 drives the sliding disk 13 to move within the second hollow column 12 via the first connecting column 11, thereby compressing the second spring 14. The rebound force of the second spring 14 pushes the sliding disk 13 back to its original position, thus making the anti-slip plate 15 tightly adhere to the inner wall of the tool holder, forming a stable frictional contact. This dynamic adjustment mechanism effectively counteracts vibrations or offsets generated during machining, ensuring the connection stability between the tool holder and the tool holder 4, thereby improving the rigidity of the overall structure and machining accuracy. When disassembling drill rod 1, rotating drill rod 1 causes the chuck 7 to slide within the slotted ring 6 to the designated position. At this point, the chuck 7 disengages from the limiting position of the chuck ball 10, the first spring 9 releases its elastic force, pushing the chuck ball 10 to move within the first hollow column 8, thus releasing the constraint on the chuck 7. Drill rod 1 can then be easily pulled out from the hollow connecting column 3. This design achieves rapid disassembly, significantly improving efficiency during tool replacement or maintenance, while ensuring the reliability and convenience of the structure.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A welded single-edged gun drill shank connection structure, comprising a hollow connecting column (3), characterized in that: A tool holder (4) is fixedly connected to one side of the hollow connecting column (3), a locking post (5) is fixedly connected to the side wall of the tool holder (4), an anti-slip plate (15) is slidably connected to the inner wall of the tool holder (4), and an external support assembly is provided at the bottom of the tool holder (4). The external support assembly includes a connecting block (16), the side wall of which is fixedly connected to the inner wall of the knife holder (4), one end of which is fixedly connected to a second hollow column (12), the inner wall of which is slidably connected to a sliding disk (13), the top of which is fixedly connected to a first connecting column (11), one end of which is fixedly connected to the bottom of the anti-slip plate (15), and the bottom of which is provided with a rebound assembly.

2. The tool holder connection structure of a welded single-edged gun drill according to claim 1, characterized in that: The rebound assembly includes a second spring (14), one end of which is fixedly connected to the inner wall of the second hollow column (12), and the other end of which is fixedly connected to the bottom of the sliding disk (13).

3. The tool holder connection structure of a welded single-edged gun drill according to claim 1, characterized in that: The hollow connecting column (3) has a drill rod (1) slidably connected inside, and a drill bit (2) is fixedly connected to one end of the drill rod (1).

4. The tool holder connection structure of a welded single-edged gun drill according to claim 3, characterized in that: The hollow connecting column (3) has a slotted ring (6) fixedly connected to its inner wall, and a retaining plate (7) is slidably connected to the inner wall of the slotted ring (6).

5. The tool holder connection structure of a welded single-edged gun drill according to claim 4, characterized in that: The side wall of the clamping plate (7) is fixedly connected to the outer wall of the drill rod (1), and the side wall of the clamping plate (7) is slidably connected to the inside of the hollow connecting column (3).

6. The tool holder connection structure of a welded single-edged gun drill according to claim 5, characterized in that: The side wall of the slotted ring (6) is fixedly connected to a first hollow column (8), and the side wall of the first hollow column (8) is fixedly connected inside the hollow connecting column (3).

7. The tool holder connection structure of a welded single-edged gun drill according to claim 6, characterized in that: The inner wall of the first hollow column (8) is slidably connected to a ball (10), and the outer wall of the ball (10) is slidably connected to the side wall of the plate (7).

8. The tool holder connection structure of a welded single-edged gun drill according to claim 7, characterized in that: The first hollow column (8) is provided with a first spring (9), one end of the first spring (9) is fixedly connected to the inner wall of the first hollow column (8), and the other end of the first spring (9) is fixedly connected to the outer wall of the ball (10).

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