Simple bush inner hole finish machining device with automatic feeding function

Abstract

The utility model discloses a lining inner hole finish machining simple device with an automatic feeding function, which comprises a front guide rod, one end of the front guide rod is connected with a cutter, the other end of the front guide rod is connected with one end of a switching drive rod, the other end of the switching drive rod is provided with a through hole, and the switching drive rod is connected with a linear feeding mechanism. The device can drive the cutter to move in the axis direction of the bushing to be machined, the feeding amount can be evenly controlled, the automatic feeding function of the cutter is achieved, and meanwhile the working efficiency and the finish machining quality are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fine machining of the inner hole of a bushing, and particularly relates to a simple device for fine machining of the inner hole of a bushing with an automatic feeding function. Background Art

[0002] When assembling in an aircraft fuselage, it is often necessary to finely machine the inner hole of a bushing of a fuselage structure part that is not easy to disassemble at a position with a narrow construction space. At present, a manual air drill is mainly used for reaming, but this processing method has the problem of uneven control of the feed rate, resulting in difficulty in ensuring the aperture, the roughness of the hole wall, and the geometric tolerance of the inner hole of the bushing. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a simple device for fine machining of the inner hole of a bushing with an automatic feeding function, and solve the problem of uneven control of the feed rate in the existing manual reaming.

[0004] The technical solution adopted by the utility model is that a simple device for fine machining of the inner hole of a bushing with an automatic feeding function includes a front guide rod. One end of the front guide rod is connected with a tool, the other end of the front guide rod is connected with one end of a transfer drive rod, a through hole is arranged at the other end of the transfer drive rod, and a linear feed mechanism is connected to the transfer drive rod.

[0005] The characteristics of the utility model also lie in that

[0006] The linear feed mechanism includes a hollow limit transfer housing, the limit transfer housing is sleeved on the outer wall of the transfer drive rod, an inner ring gear is arranged on the inner wall of the limit transfer housing far from the transfer drive rod, a number of reduction gears are meshed along the circumference of the inner ring gear, the number of reduction gears are meshed with an outer ring gear, the outer ring gear is sleeved on the outer wall of the transfer drive rod, and a fixed bracket is threadedly connected to the outer wall of the limit transfer housing far from the transfer drive rod.

[0007] One end of the limit transfer housing is provided with an opening, a limit transfer housing cover plate is arranged at the opening, and the end of the limit transfer housing cover plate is connected with the end of the limit transfer housing through a limit transfer housing fastening screw.

[0008] The transfer drive rod is a stepped shaft, the diameter of the middle position is larger than that of both ends, and an outer ring gear is sleeved on the outer wall of the middle position.

[0009] The end of the transfer drive rod far from the front guide rod is set as an external hexagonal head structure.

[0010] The outer diameter of one end of the fixed bracket close to the front guide rod is larger than that of the end far from the front guide rod.

[0011] The tool includes a tool shank, one end of the tool shank is connected with a tool bit, and the other end of the tool shank is connected with the front guide rod.

[0012] The beneficial effects of the present utility model are as follows: The simple device for precision machining of the inner hole of the bushing with an automatic feeding function according to the present utility model can drive the tool to move along the axis direction of the bushing to be machined and can uniformly control the feeding amount by setting a linear feeding mechanism, realizing the automatic feeding function of the tool, and improving the working efficiency and precision machining quality at the same time. Brief Description of the Drawings

[0013] Figure 1 It is a cross-sectional view of the simple device for precision machining of the inner hole of the bushing with an automatic feeding function according to the present utility model;

[0014] Figure 2 It is a structural schematic diagram of the simple device for precision machining of the inner hole of the bushing with an automatic feeding function according to the present utility model;

[0015] Figure 3 It is an operation schematic diagram of the simple device for precision machining of the inner hole of the bushing with an automatic feeding function according to the present utility model.

[0016] In the figure, 1. Tool, 2. Tool fastening screw, 3. Front guide rod, 4. Adapter drive rod fastening screw, 5. Limit adapter housing, 6. Reduction gear, 7. Adapter drive rod, 8. Limit adapter housing fastening screw, 9. Limit adapter housing cover plate, 10. Fixed bracket, 11. Inner ring gear, 12. Outer ring gear, 13. Through hole, 14. Aviation bushing, 15. Body part. Specific Embodiments

[0017] The present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0018] Embodiment 1

[0019] The simple device for precision machining of the inner hole of the bushing with an automatic feeding function according to the present utility model, structure diagram Figure 1 and Figure 2As shown in the figure, it includes a front guide rod 3. One end of the front guide rod 3 is connected with a tool 1, and the other end of the front guide rod 3 is connected with one end of a transfer drive rod 7. Specifically, the tool 1 includes a tool handle, and one end of the tool handle is connected with a tool tip. Blind holes are provided at both ends of the front guide rod 3. A tool handle is arranged in the blind hole at one end, and the tool handle and the end of the front guide rod 3 are connected and fixed by a tool fastening screw 2. One end of the transfer drive rod 7 is arranged in the blind hole at the other end, and the transfer drive rod 7 and the end of the front guide rod 3 are connected and fixed by a transfer drive rod fastening screw 4. The end of the transfer drive rod 7 far from the front guide rod 3 is set as an external hexagonal head structure, and a through hole 13 is provided on the side wall of the external hexagonal head structure part. A lever can be arranged in the through hole 13, and by rotating the lever, the transfer drive rod 7 is driven to rotate. The external hexagonal head structure can drive the transfer drive rod 7 to rotate by using tools such as a wrench and a pneumatic wrench. A linear feed mechanism is connected to the transfer drive rod 7, and the linear feed mechanism is used to feed the tool along the axis of the bushing.

[0020] Embodiment 2

[0021] On the basis of Embodiment 1, the linear feed mechanism includes a hollow limit transfer housing 5. The limit transfer housing 5 is sleeved on the outer wall of the transfer drive rod 7. An inner ring gear 11 is provided on the inner wall of the limit transfer housing 5 far from the transfer drive rod 7. A number of reduction gears 6 are meshed along the circumference of the inner ring gear 11. The number of reduction gears 6 is four and they are equally spaced along the inner circumference of the inner ring gear 11. The reduction gears 6 are arranged between the inner ring gear 11 and the outer ring gear 12. A fixed bracket 10 is threadedly connected to the outer wall of the limit transfer housing 5 far from the transfer drive rod 7, that is, an external thread is provided on the outer wall of the limit transfer housing 5, and an internal thread is provided on the inner wall of the fixed bracket 10. The external thread and the internal thread cooperate. When the transfer drive rod 7 rotates, it drives the outer ring gear 12 to rotate, and drives the inner ring gear 11 to rotate through the reduction gears 6, thereby driving the limit transfer housing 5 to rotate. Since the limit transfer housing 5 is threadedly connected to the fixed bracket 10, the limit transfer housing 5 can move linearly relative to the fixed bracket 10, thereby driving the tool 1 to feed linearly.

[0022] Embodiment 3

[0023] On the basis of Embodiment 2, one end of the limit transfer housing 5 is provided with an opening, and a limit transfer housing cover plate 9 is provided at the opening. The end of the limit transfer housing cover plate 9 is connected to the end of the limit transfer housing 5 by a limit transfer housing fastening screw 8. The limit transfer housing cover plate 9 is sleeved on the outer wall of the transfer drive rod 7. By providing the limit transfer housing cover plate 9, it is convenient to install, disassemble and repair the reduction gears 6, inner ring gear 11 and outer ring gear 12 inside the limit transfer housing 5.

[0024] The transfer drive rod 7 is a stepped shaft with a larger diameter at the middle position than at both ends. An outer ring gear 12 is sleeved on the outer wall at the middle position. The limit transfer housing 5 and the limit transfer housing cover plate 9 are both sleeved on the outer wall at the smaller diameter position. The limit transfer housing 5 and the limit transfer housing cover plate 9 are respectively arranged at both ends of the middle position, so as to realize that when the limit transfer housing 5 moves linearly, it can drive the transfer drive rod 7 to move linearly.

[0025] The outer diameter of one end of the fixed bracket 10 close to the front guide rod 3 is larger than that of the end far from the front guide rod 3. Then, during use, the contact area between the fixed bracket 10 and the body part 15 can be made larger, increasing the stability.

[0026] The working process of the simple device for finish machining the inner hole of the bushing with an automatic feeding function of the present utility model is as follows: When finish machining the inner hole of the aviation bushing 14, after assembling the reduction gear 6, the limit transfer housing 5, the transfer drive rod 7, the limit transfer housing cover plate 9, and the limit transfer housing fastening screw 8, screw them into the fixed bracket 10. Connect and fix the front guide rod 3 and the transfer drive rod 7 through the transfer drive rod fastening screw 4. Then, pass the front guide rod 3 through the inner hole of the aviation bushing 14 to be machined, and connect and fix the tool 1 and the front guide rod 3 through the tool fastening screw 2. Then, use tools such as a wrench, an air wrench, and a tap wrench to act on the outer hexagon of the transfer drive rod 7. Through the rotation of the transfer drive rod 7, drive the outer ring gear 12 to rotate, drive the inner ring gear 11 to rotate through the reduction gear 6, and thus drive the limit transfer housing 5 to rotate. Since the limit transfer housing 5 is threadedly connected to the fixed bracket 10, the limit transfer housing 5 can linearly move relative to the fixed bracket 10, thereby driving the tool 1 to linearly feed along the axis of the aviation bushing 14 to be machined. Then, the tool 1 performs finish machining on the inner hole of the aviation bushing 14 to be machined, and the feed rate is realized by rotating the transfer drive rod 7, so that the feed rate can be evenly controlled. The specific feed displacement of the tool 1 is: As Figure 3 shown, the rotation speed of the air wrench, the wrench, and the tap wrench is N, the thread pitch of the limit transfer housing 5 and the fixed bracket 10 is P, and the gear transmission ratio between the transfer drive rod 7 and the limit transfer housing 5 is M:1. After the rotation torque of the transfer drive rod 7 is transmitted to the fixed bracket 10, it is converted into the axial displacement feed S of the tool 1 = N·P / M. After use, disassemble the tool 1 and the front guide rod 3, and the front guide rod 3 and the transfer drive rod 7 respectively.

[0027] The simple device for finish machining the inner hole of the bushing with an automatic feeding function of the present utility model can reduce the types of equipment and tools used and avoid part scrapping caused by disassembling the body structure parts. Especially when construction is carried out in a relatively enclosed area of the aircraft and the body structure parts cannot be disassembled, it can realize finish machining of the inner hole of the bushing of the on-board parts while improving the assembly work efficiency and the physical quality of the product.

Claims

1. A simple device for finish machining the inner hole of a bushing with an automatic feeding function, characterized in that, It includes a front guide rod (3), one end of the front guide rod (3) is connected with a cutter (1), the other end of the front guide rod (3) is connected with one end of a transfer drive rod (7), a through hole (13) is arranged at the other end of the transfer drive rod (7), and a linear feed mechanism is connected to the transfer drive rod (7). The linear feed mechanism includes a hollow limit transfer housing (5), the limit transfer housing (5) is sleeved on the outer wall of the transfer drive rod (7), an inner ring gear (11) is arranged on the inner wall of the limit transfer housing (5) far away from the transfer drive rod (7), a number of reduction gears (6) are meshed along the circumference of the inner ring gear (11), the number of the reduction gears (6) are meshed with an outer ring gear (12), the outer ring gear (12) is sleeved on the outer wall of the transfer drive rod (7), and a fixed bracket (10) is threadedly connected to the outer wall of the limit transfer housing (5) far away from the transfer drive rod (7).

2. The simple device for finish machining the inner hole of the bushing with an automatic feeding function according to claim 1, characterized in that, One end of the limit transfer housing (5) is provided with an opening, a limit transfer housing cover plate (9) is arranged at the opening, and the end of the limit transfer housing cover plate (9) is connected with the end of the limit transfer housing (5) through a limit transfer housing fastening screw (8).

3. The simple device for finish machining the inner hole of the bushing with an automatic feeding function according to claim 1, characterized in that, The transfer drive rod (7) is a stepped shaft, the diameter at the middle position is larger than the diameters at both ends, and the outer ring gear (12) is sleeved on the outer wall at the middle position.

4. The simple device for finish machining the inner hole of the bushing with an automatic feeding function according to claim 1, characterized in that, The end of the transfer drive rod (7) far away from the front guide rod (3) is set as an external hexagonal head structure.

5. The simple device for finish machining the inner hole of the bushing with an automatic feeding function according to claim 1, characterized in that, The outer diameter of the end of the fixed bracket (10) close to the front guide rod (3) is larger than the outer diameter of the end far away from the front guide rod (3).

6. The simple device for finish machining the inner hole of the bushing with an automatic feeding function according to claim 1, characterized in that, The cutter (1) includes a tool holder, one end of the tool holder is connected with a tool bit, and the other end of the tool holder is connected with the front guide rod (3).

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