A drill tool for machining a large workpiece

Abstract

This utility model relates to the field of drilling equipment technology, specifically a drilling tool for machining large workpieces, including an extension rod, a connector, and a second fixing ring. The extension rod has a connector at its upper end, and a fitting block is welded to the outer wall of the upper end of the extension rod. A first fixing ring is welded to the outer wall of the connector, and a circular array of ferrules is welded to the outer wall of the first fixing ring. A buckle is connected to the inner pin of the ferrule. A second fixing ring is welded to the outer wall of the extension rod, and a circular array of guide rods is welded to the outer wall of the upper end of the second fixing ring. A wave spring is sleeved on the outer side of the fitting block to provide a movement distance between the boring tool and the connector, preventing excessive movement of the boring tool and avoiding rigid compression between the boring tool and the workpiece, thus achieving the purpose of protecting the boring tool and the drilling device and ensuring the service life of the boring tool and the drilling device.

Description

Technical Field

[0001] This utility model relates to the field of drilling equipment technology, specifically to a drilling tool for processing large workpieces. Background Technology

[0002] Drilling is a technique that uses tools to create holes on the surface or inside of an object. Large workpieces typically refer to objects weighing over several tons and measuring several meters in size. Therefore, they are usually drilled using floor-mounted drilling machines, CNC gantry drilling machines, or portable boring machines. Among them, the portable boring machine is a mobile precision machining device that uses a motor to drive the boring bar to rotate, while a feed mechanism makes the boring tool move along the axis of the boring bar, thereby achieving the boring of the workpiece hole.

[0003] Common drilling tools include twist drills, center drills, deep hole drills, reamers, and boring tools. Common types include single-edged boring tools, double-edged boring tools, and multi-edged boring tools. The boring tool is installed and adjusted on the boring bar to enlarge, trim, and finish existing holes. While rotating, the boring tool can also feed along the axis of the hole.

[0004] While existing drilling tools offer numerous advantages during use, they still suffer from the following problems: Before boring a hole in a workpiece, the operator must first drive the boring bar to contact the workpiece using the drilling device to achieve tool alignment and ensure the corresponding position of the tool and the boring hole. However, during the boring bar adjustment process, it is difficult to control the contact force between the workpiece and the tool, which can lead to excessive contact between the tool and the workpiece, causing damage to the tool and the drilling device. Utility Model Content

[0005] To address the problems in the existing technology, this utility model provides a drilling tool for machining large workpieces.

[0006] The technical solution adopted by this utility model to solve its technical problem is a drilling tool for machining large workpieces, including an extension rod, a connector, and a second fixing ring. The extension rod is provided with a connector at its upper end, and a fitting block is welded to the outer wall of the upper end of the extension rod. A first fixing ring is welded to the outer wall of the connector, and a circular array of ferrules is welded to the outer wall of the first fixing ring. A buckle is connected to the inner pin of the ferrule. A second fixing ring is welded to the outer wall of the extension rod, and a circular array of guide rods is welded to the outer wall of the upper end of the second fixing ring. A wave spring is sleeved on the outer side of the fitting block.

[0007] By adopting the above technical solution, the extension rod and connector can be used to combine the drive shaft of the drilling device with the boring bar, ensuring the boring bar's depth of penetration. The elasticity of the wave spring maintains the relative distance between the connector and the extension rod, ensuring the relative positional stability of the boring bar when the operator sets the tool with the workpiece, thus ensuring the accuracy of the tool setting. The distance between the extension rod and the connector provides movement distance between the boring bar and the connector, preventing excessive movement of the boring bar and avoiding rigid compression between the boring bar and the workpiece, which could cause damage. This achieves the goal of ensuring the proper functioning of the boring bar and the drilling device. The purpose of this protection is to ensure the service life of the boring bar and drilling device. During subsequent drilling, the drilling device applies axial pressure to the boring bar, causing the interlocking block to move relative to each other inside the interlocking groove until the interlocking block presses against the inner wall of the interlocking groove. At this time, the end of the buckle moves to the lower end of the second fixing ring, and the torsional force generated by the torsion spring enables the buckle to engage with the second fixing ring, ensuring the connection stability between the extension rod and the connector. The drive shaft of the drilling device can drive the extension rod and the boring bar to rotate synchronously through the rectangular interlocking block and the interlocking groove, and enable the boring bar to perform boring processing on the inside of the workpiece.

[0008] Specifically, a boring bar is screwed to the lower outer wall of the extension rod, and a cutting head is screwed to both sides of the lower outer wall of the boring bar.

[0009] By adopting the above technical solution, the screw ensures the connection strength between the extension rod and the boring tool, and when the extension rod is driven to rotate by the drilling device, the cutting head can perform boring processing on the inner wall of the workpiece.

[0010] Specifically, the lower outer wall of the connector has a fitting groove, the fitting block is located inside the fitting groove, and the depth of the fitting groove is greater than the length of the fitting block.

[0011] By adopting the above technical solution, the fitting groove is longer than the fitting block, providing compression space for the wave spring. The distance between the lower end face of the first fixing ring and the lower end face of the connector and the distance between the upper end face of the second fixing ring and the upper end face of the extension rod provides a limiting position for the wave spring, ensuring that the wave spring is stably positioned between the first and second fixing rings. The cooperation between the fitting block and the fitting groove ensures the coaxiality of the extension rod and the connector.

[0012] Specifically, both ends of the buckle are fitted with torsion springs, and the two ends of the torsion springs are in contact with the inner wall of the sleeve and the outer wall of the buckle, respectively.

[0013] By adopting the above technical solution, the torsion springs at both ends of the buckle provide elastic force, so that the buckle automatically locks after it is locked onto the lower end face of the second fixing ring. This can stabilize the relative position of the first fixing ring and the second fixing ring after they are combined. Moreover, the elastic force of the torsion spring can overcome the centrifugal force when the extension rod rotates, ensuring the relative position of the sleeve is stable.

[0014] Specifically, the second fixing ring has guide holes arranged in a circular array inside, the inner diameter of the guide holes being larger than the outer diameter of the guide rod, and the guide rod being located inside the guide holes.

[0015] By adopting the above technical solution, the guide hole and guide rod can guide the relative movement between the first fixed ring and the second fixed ring, ensuring the coaxiality between the extension rod and the connector.

[0016] Specifically, a limit block is threadedly connected to the upper end face of the guide rod, and the upper end of the limit block is located at the upper end of the first fixing ring.

[0017] By adopting the above technical solution, the limiting block prevents the guide rod from coming out of the guide hole, thus ensuring the structural integrity of the overall tool.

[0018] Specifically, the wave spring is located between the connector and the extension rod, and the upper and lower ends of the wave spring are in contact with the lower end face of the connector and the upper end face of the extension rod, respectively.

[0019] By adopting the above technical solution, the wave spring provides axial support between the connector and the extension rod, maintaining the relative position stability between the extension rod and the connector.

[0020] The beneficial effects of this utility model are:

[0021] The present invention discloses a drilling tool for machining large workpieces. The distance between the extension rod and the connector provides a moving distance between the boring tool and the connector, avoiding excessive movement of the boring tool, which could lead to rigid compression between the boring tool and the workpiece and cause damage. This achieves the purpose of protecting the boring tool and the drilling device, and ensuring the service life of the boring tool and the drilling device.

[0022] The present invention discloses a drilling tool for machining large workpieces. The end of the buckle moves to the lower end of the second fixed ring, and the buckle engages with the second fixed ring by the torsional force generated by the torsion spring, ensuring the connection stability between the extension rod and the connector. The drive shaft of the drilling device can drive the extension rod and the boring tool to rotate synchronously through the rectangular fitting block and fitting groove, and make the boring tool perform boring machining on the inside of the workpiece. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the main body of the extension rod structure of this utility model;

[0025] Figure 2 This is a disassembly diagram of the boring bar structure of this utility model;

[0026] Figure 3This is a disassembled schematic diagram of the connector structure of this utility model;

[0027] Figure 4 This is a cross-sectional view of the connector structure of this utility model.

[0028] In the diagram: 1. Extension rod; 11. Boring tool; 12. Fitting block; 13. Wave spring; 2. Connector; 21. Fitting groove; 22. First fixing ring; 23. Guide hole; 24. Sleeve; 25. Buckle; 3. Second fixing ring; 31. Guide rod; 32. Limiting block. Detailed Implementation

[0029] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0030] To save manpower and improve efficiency, as one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention discloses a drilling tool for machining large workpieces, comprising an extension rod 1, a connector 2, and a second fixing ring 3. The extension rod 1 is provided with a connector 2 at its upper end, and a fitting block 12 is welded to the outer wall of the upper end of the extension rod 1. The connector 2 is welded to the outer wall of the connector 2, and a circular array of retaining sleeves 24 are welded to the outer wall of the first fixing ring 22. A buckle 25 is connected to the inner pin of the retaining sleeve 24. The extension rod 1 is welded to the outer wall of the second fixing ring 3, and a circular array of guide rods 31 are welded to the outer wall of the upper end of the second fixing ring 3. A wave spring 13 is sleeved on the outer side of the fitting block 12.

[0031] In use, the extension rod 1 and connector 2 connect the drive shaft of the drilling device to the boring bar 11, ensuring the boring bar 11's depth of penetration. The elasticity of the wave spring 13 maintains the relative distance between the connector 2 and the extension rod 1, ensuring the relative positional stability of the boring bar 11 when the operator sets the tool with the workpiece, thus ensuring the accuracy of the tool setting. The distance between the extension rod 1 and the connector 2 provides movement space between the boring bar 11 and the connector 2, preventing excessive movement of the boring bar 11 and avoiding rigid compression between the boring bar 11 and the workpiece, which could cause damage. This achieves the protection of the boring bar 11 and the drilling device. The purpose is to ensure the service life of the boring bar 11 and the drilling device. During subsequent drilling, the drilling device applies axial pressure to the boring bar 11, causing the fitting block 12 to move relative to the fitting groove 21 until the fitting block 12 presses against the inner wall of the fitting groove 21. At this time, the end of the buckle 25 moves to the lower end of the second fixing ring 3, and the torsional force generated by the torsion spring enables the buckle 25 to engage with the second fixing ring 3, ensuring the connection stability between the extension rod 1 and the connector 2. The drive shaft of the drilling device can drive the extension rod 1 and the boring bar 11 to rotate synchronously through the rectangular fitting block 12 and the fitting groove 21, and enable the boring bar 11 to perform boring processing on the inside of the workpiece.

[0032] For drilling operations, exemplarily, such as Figure 1 As shown, a boring bar 11 is screwed to the lower outer wall of the extension rod 1, and a cutting head is screwed to both sides of the lower outer wall of the boring bar 11.

[0033] During use, the screw ensures the connection strength between the extension rod 1 and the boring tool 11, and when the extension rod 1 is driven to rotate by the drilling device, the cutting head can perform boring processing on the inner wall of the workpiece.

[0034] For synchronized rotation, for example, such as Figure 4 As shown, a fitting groove 21 is provided on the lower outer wall of the connector 2, and the fitting block 12 is located inside the fitting groove 21, and the depth of the fitting groove 21 is greater than the length of the fitting block 12.

[0035] In use, the fitting groove 21 is longer than the fitting block 12, providing compression space for the wave spring 13. The distance between the lower end face of the first fixing ring 22 protruding from the lower end face of the connector 2 and the distance between the upper end face of the second fixing ring 3 protruding from the upper end face of the extension rod 1 provides a limiting position for the wave spring 13, ensuring that the wave spring 13 is stably positioned between the first fixing ring 22 and the second fixing ring 3. The cooperation between the fitting block 12 and the fitting groove 21 can ensure the coaxiality of the extension rod 1 and the connector 2.

[0036] To ensure a stable connection, for example, such as Figure 4 As shown, both ends of the buckle 25 are fitted with torsion springs, and the two ends of the torsion springs are in contact with the inner wall of the sleeve 24 and the outer wall of the buckle 25, respectively.

[0037] When in use, the torsion springs at both ends of the buckle 25 provide elastic force, so that the buckle 25 automatically locks after it is locked onto the lower end face of the second fixing ring 3. This can stabilize the relative position of the first fixing ring 22 and the second fixing ring 3 after they are combined. Furthermore, the elastic force of the torsion spring can overcome the centrifugal force when the extension rod 1 rotates, ensuring the relative position of the sleeve 24 is stable.

[0038] For guidance, exemplified, such as Figure 4 As shown, the second fixing ring 3 has guide holes 23 arranged in a circular array inside. The inner diameter of the guide holes 23 is larger than the outer diameter of the guide rod 31, and the guide rod 31 is located inside the guide holes 23.

[0039] In use, the guide hole 23 and the guide rod 31 can guide the relative movement between the first fixed ring 22 and the second fixed ring 3, ensuring the coaxiality between the extension rod 1 and the connector 2.

[0040] To limit the distance of movement, for example, such as Figure 4 As shown, a limit block 32 is threadedly connected to the upper end face of the guide rod 31, and the upper end of the limit block 32 is located at the upper end of the first fixing ring 22.

[0041] During use, the limiting block 32 prevents the guide rod 31 from coming out of the guide hole 23, ensuring the structural integrity of the entire tool.

[0042] To maintain relative stability, for example, such as Figure 3 As shown, the wave spring 13 is located between the connector 2 and the extension rod 1, and the upper and lower ends of the wave spring 13 are in contact with the lower end face of the connector 2 and the upper end face of the extension rod 1, respectively.

[0043] During use, the wave spring 13 provides axial support between the connector 2 and the extension rod 1, keeping the relative position between the extension rod 1 and the connector 2 stable.

[0044] When this utility model is in use, the drilling device drives the connector 2 to approach the workpiece, but axial pressure has not yet been applied. The elastic force of the wave spring 13 keeps the extension rod 1 and the connector 2 at the initial distance. At this time, the boring tool 11 is in a floating state. The operator slowly moves the boring tool 11 closer to the target hole of the workpiece. Due to the support of the wave spring 13, the boring tool 11 remains stable when it contacts the workpiece, which makes it easy to adjust the position accurately.

[0045] The drilling device applies axial pressure to the connector 2, compresses the wave spring 13, and causes the fitting block 12 to move in the fitting groove 21. When the fitting block 12 contacts the bottom of the fitting groove 21, the end of the buckle 25 moves down with the first fixing ring 22 to the lower end of the second fixing ring 3. The elastic force of the torsion spring causes the buckle 25 to automatically lock the second fixing ring 3, locking the relative position of the extension rod 1 and the connector 2.

[0046] The drilling device transmits torque through the rectangular cross-section fitting block 12 and fitting groove 21, driving the extension rod 1 and the boring tool 11 to rotate synchronously. The cutting heads on both sides of the boring tool 11 cut the inner wall of the workpiece to complete the boring process.

[0047] After processing, the staff manually flips the buckle 25 to unlock the first fixing ring 22 and the second fixing ring 3, and the wave spring 13 releases its elastic force to drive the extension rod 1 and the connector 2 to reset.

[0048] It should be noted that this utility model is a drilling tool for machining large workpieces. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A drilling tool for machining large workpieces, characterized in that, The device includes an extension rod (1), a connector (2), and a second fixing ring (3). The extension rod (1) has a connector (2) at its upper end. A fitting block (12) is welded to the outer wall of the upper end of the extension rod (1). A first fixing ring (22) is welded to the outer wall of the connector (2). A circular array of sleeves (24) is welded to the outer wall of the first fixing ring (22). A buckle (25) is connected to the inside of the sleeve (24) by a pin. A second fixing ring (3) is welded to the outer wall of the extension rod (1). A circular array of guide rods (31) is welded to the outer wall of the upper end of the second fixing ring (3). A wave spring (13) is sleeved on the outer side of the fitting block (12).

2. A drilling tool for machining large workpieces according to claim 1, characterized in that, The lower end of the extension rod (1) is screwed to a boring bar (11), and both sides of the lower end of the boring bar (11) are screwed to a cutting head.

3. A drilling tool for machining large workpieces according to claim 1, characterized in that, The lower outer wall of the connector (2) is provided with a fitting groove (21), the fitting block (12) is located inside the fitting groove (21), and the depth of the fitting groove (21) is greater than the length of the fitting block (12).

4. A drilling tool for machining large workpieces according to claim 1, characterized in that, Both ends of the buckle (25) are fitted with torsion springs, and the two ends of the torsion springs are in contact with the inner wall of the sleeve (24) and the outer wall of the buckle (25), respectively.

5. A drilling tool for machining large workpieces according to claim 1, characterized in that, The second fixing ring (3) has guide holes (23) arranged in a circular array inside. The inner diameter of the guide holes (23) is larger than the outer diameter of the guide rod (31), and the guide rod (31) is located inside the guide holes (23).

6. A drilling tool for machining large workpieces according to claim 1, characterized in that, The upper end face of the guide rod (31) is threadedly connected to a limiting block (32), and the upper end of the limiting block (32) is located at the upper end of the first fixing ring (22).

7. A drilling tool for machining large workpieces according to claim 1, characterized in that, The wave spring (13) is located between the connector (2) and the extension rod (1), and the upper and lower ends of the wave spring (13) are in contact with the lower end face of the connector (2) and the upper end face of the extension rod (1), respectively.

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