Auxiliary tool for processing intermediate shaft of ship

Abstract

The application relates to the technical field of intermediate shaft machining tooling, and discloses an auxiliary tooling for ship intermediate shaft machining, which comprises a chuck, an intermediate shaft body and a connecting assembly. The intermediate shaft body is located outside the chuck, the intermediate shaft body is clamped and machined through the chuck, the connecting assembly is located between the chuck and the intermediate shaft body, and the intermediate shaft body and the chuck are fastened and connected through the connecting assembly. The position of the T-shaped sliding block in the T-shaped sliding groove on the chuck is adjusted, the transmission rod is screwed into the mounting seat, the flange surface of the intermediate shaft body is fixed relative to the mounting seat, the intermediate shaft body is driven, power is not blocked, power transmission is uniform, the influence of the initial movement of the intermediate shaft is reduced, power transmission is timely, the shaft and the lathe main shaft do not move relative to each other, the run-out of machining of the intermediate shaft body at all places is ensured to be within an error range, and the machining precision of the intermediate shaft body is improved.

Description

Technical Field

[0001] This invention relates to the field of intermediate shaft machining tooling technology, specifically to an auxiliary tooling for machining ship intermediate shafts. Background Technology

[0002] In shipbuilding, the intermediate shaft is an important and critical component, requiring extremely high dimensional and positional accuracy during its fabrication. In the construction of the 17,000-ton asphalt tanker, the intermediate shaft was characterized by its thin diameter and long length. Compared to intermediate shafts of other ship types, this shaft was slender and lacked rigidity, making it difficult to control precision during fabrication. This frequently resulted in the inability to machine the bracket stops, thus preventing the machining of the reference datum and consequently hindering the machining of other parts.

[0003] Currently, during the power transmission process, a U-shaped chuck with copper padding (to protect the flange surface) is used. In this process, the runout can be controlled to meet the requirements within the error range when machining the bracket. However, in actual process, there may be relative movement between the U-shaped chuck and the main shaft and intermediate shaft during the clamping process, resulting in uneven power transmission and machining difficulties. Therefore, an auxiliary tooling for machining ship intermediate shafts is proposed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an auxiliary tooling for machining ship intermediate shafts, thereby solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an auxiliary tooling for machining ship intermediate shafts, comprising: Chuck; An intermediate shaft is located outside the chuck, and the intermediate shaft is clamped and processed by the chuck. A connecting component is located between the chuck and the intermediate shaft, and the intermediate shaft and the chuck are fastened together by the connecting component.

[0006] Furthermore, the connecting assembly includes a T-shaped slider, a mounting base is fixedly connected to the outer surface of the T-shaped slider, a threaded hole is opened on the outer surface of the mounting base, a transmission rod passes through the end of the intermediate shaft, and the other end of the transmission rod is threadedly connected to the inside of the threaded hole.

[0007] Furthermore, a T-shaped groove is formed on the outer surface of the chuck, and the T-shaped slider is slidably connected to the inside of the T-shaped groove.

[0008] Furthermore, the end of the intermediate shaft is provided with a flange face, and the outer surface of the flange face is provided with a through hole. The diameter of the through hole is larger than the diameter of the transmission rod, and the through hole provides space for the transmission rod to pass through.

[0009] Furthermore, the transmission rod is provided with an expansion mechanism inside, which eliminates the gap between the transmission rod and the through hole.

[0010] Furthermore, the expansion mechanism includes multiple triangular blocks arranged in a circumferential array inside the transmission rod. A connecting rod is fixedly connected to the other end of each triangular block, and a tensioning plate is fixedly connected to the other end of the connecting rod.

[0011] Furthermore, the expansion mechanism also includes a compression component, which compresses multiple triangular blocks to cause the tension plate to expand outward.

[0012] Furthermore, the extrusion assembly includes an extrusion rod that movably passes through one end of the transmission rod. An extrusion head is fixedly connected to one end of the extrusion rod outside the transmission rod, and an extrusion block is fixedly connected to the other end of the extrusion rod away from the extrusion head. A connecting disc is fixedly sleeved on the outer surface of the extrusion rod, and a first spring is fixedly connected between the connecting disc and the inner wall of one end of the transmission rod. The first spring is sleeved on the outside of the extrusion rod.

[0013] Furthermore, the expansion assembly also includes a guide assembly, which guides the movement of the tensioning plate to ensure stable linear movement of the tensioning plate.

[0014] Furthermore, the guide assembly includes a support rod fixedly connected to the inner wall of the transmission rod, a connecting block fixedly connected to one end of the support rod, a second spring and a telescopic rod fixedly connected between the connecting block and the tensioning plate, and the second spring being sleeved on the outside of the telescopic rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, by adjusting the position of the T-shaped slider inside the T-shaped groove on the chuck, and then screwing the transmission rod into the mounting base, the flange surface of the intermediate shaft is fixed relative to the mounting base. When transmitting the intermediate shaft, there is no power jamming, and the power transmission is uniform, reducing the impact of the intermediate shaft spinning during the initial movement. The power transmission is timely, and there is no relative movement between the shaft and the lathe spindle, ensuring that the runout of the intermediate shaft is within the error range and improving the machining accuracy of the intermediate shaft.

[0016] 2. In this invention, when the transmission rod is inserted into the threaded hole, when the extrusion head contacts the inner wall of the threaded hole, as the transmission rod is screwed in, the extrusion head causes the extrusion rod to retract into the transmission rod, causing the extrusion block to press against the triangular block, causing the triangular block to expand outward. The triangular block drives the connecting rod to expand the tension plate outward, so that the tension plate is tightly supported on the inner wall of the through hole, thereby eliminating the gap between the transmission rod and the through hole and avoiding gaps between the transmission rod and the through hole that would affect the stability of the connection. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a side view schematic diagram of the structure of the present invention; Figure 4 This is a schematic diagram of the transmission rod structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the transmission rod of the present invention; Figure 6 For the present invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point B.

[0018] In the diagram: 100, chuck; 200, intermediate shaft; 201, flange face; 300, T-shaped slider; 301, mounting base; 302, transmission rod; 400, triangular block; 401, connecting rod; 402, tension plate; 500, extrusion rod; 501, extrusion head; 502, connecting plate; 503, first spring; 504, extrusion block; 600, connecting block; 601, second spring; 602, telescopic rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: Please refer to the following: Figures 1-7 The present invention provides a technical solution: an auxiliary tooling for machining a ship intermediate shaft, including a chuck 100, an intermediate shaft body 200 and a connecting assembly. The intermediate shaft body 200 is located outside the chuck 100 and is clamped and machined by the chuck 100. The connecting assembly is located between the chuck 100 and the intermediate shaft body 200 and is used to fasten the intermediate shaft body 200 and the chuck 100 together.

[0021] In this embodiment, the connecting assembly includes a T-shaped slider 300, with a mounting base 301 fixedly connected to its outer surface. A threaded hole is formed on the outer surface of the mounting base 301. A transmission rod 302 passes through the end of the intermediate shaft 200, and the other end of the transmission rod 302 is threaded into the threaded hole. Specifically, the mounting base 301 is integrally welded to the outer end face of the T-shaped slider 300, and the two are rigidly connected without any loosening or gaps, ensuring stress-free deformation during transmission. A standard internal threaded hole is formed at the center of the outer end face of the mounting base 301, with the thread precision matching the thread specification of the transmission rod 302 to ensure a tight threaded connection without any play. The transmission rod 302 is axially inserted through the end of the intermediate shaft 200, and the end of the transmission rod 302 near the mounting base 301 is an externally threaded section that precisely engages with the internal threaded hole of the mounting base 301.

[0022] During actual assembly, the transmission rod 302 is first smoothly passed through the pre-set through hole at the end of the intermediate shaft 200. Then, the threaded end of the transmission rod 302 is screwed into the threaded hole of the mounting base 301 at a uniform speed, and gradually tightened to achieve complete engagement. Through the rigid threaded connection, the intermediate shaft 200 and the mounting base 301 on the chuck 100 are firmly connected as one unit, achieving relative and complete fixation of the chuck 100, the connecting assembly, and the intermediate shaft 200. Compared with the traditional direct clamping method, this structure can completely eliminate the problems of the intermediate shaft 200 spinning freely and power transmission being stuck and delayed in the initial stage of machining. It achieves uniform, synchronous, and delay-free transmission of power to the lathe spindle. There is no relative slippage or movement between the shaft and the lathe spindle. It precisely controls the radial and end face runout of the entire machining section of the intermediate shaft 200, strictly controlling the runout error within the allowable range of the process, greatly improving the overall machining accuracy and finished product qualification rate of the intermediate shaft. It is especially suitable for high-precision turning of large long shaft components in ships.

[0023] In this embodiment, a T-shaped groove is provided on the outer surface of the chuck 100, and the T-shaped slider 300 is slidably connected to the inside of the T-shaped groove. Specifically, in order to adapt to the clamping requirements of ship intermediate shafts of different specifications and shaft diameters, this tooling is equipped with an adjustable sliding positioning structure. Multiple T-shaped grooves are evenly distributed radially on the outer circumferential surface of the standard lathe chuck 100. The groove and the chuck 100 are integrally machined, and the inner wall of the groove has a high smoothness and meets the dimensional accuracy standards, so as to avoid the slider from sliding jamming or deflection.

[0024] The T-shaped slider 300 and the T-shaped groove of the connecting component adopt a clearance fit sliding connection. The slider can slide freely along the radial direction of the groove to adjust its position, simultaneously driving the top mounting base 301 and the threaded hole to move synchronously. For intermediate shafts 200 of different diameters, the T-shaped slider 300 can be slid in advance to precisely adjust the mounting base 301 and the threaded hole to the position aligned with the through hole at the end of the intermediate shaft. After adjustment, temporary positioning can be achieved by relying on the contact friction between the groove and the slider, which facilitates the quick insertion and threaded connection of the subsequent transmission rod 302. This greatly improves the versatility and clamping efficiency of the tooling, and can adapt to the processing of multiple models of intermediate shafts within a certain size range without changing the tooling, reducing tooling change costs and debugging time.

[0025] In this embodiment, a flange face 201 is provided at the end of the intermediate shaft 200. A through hole is formed on the outer surface of the flange face 201. The diameter of the through hole is larger than the diameter of the transmission rod 302. The through hole provides space for the transmission rod 302 to pass through. Specifically, an integral flange face 201 is provided at the end of the shaft near the tooling. The flange face 201 is coaxially machined with the shaft to ensure the perpendicularity and coaxiality of the end face, and to avoid the flange face 201 from being misaligned and affecting the subsequent clamping accuracy. A through hole is axially formed at the center of the outer circle of the flange face 201. The diameter of the through hole is slightly larger than the outer diameter of the transmission rod 302, leaving a reasonable assembly gap. This provides sufficient space for the transmission rod 302 to pass through smoothly and prevents jamming, bumping and scratching during the assembly process.

[0026] Example 2: Please refer to the following: Figures 1-7 The present invention provides a technical solution: an expansion mechanism is provided inside the transmission rod 302 to eliminate the gap between the transmission rod 302 and the through hole. Specifically, there may be a gap between the transmission rod 302 and the through hole of the flange surface 201. Within this gap, it is easy to cause transmission shaking and radial movement during processing, which in turn leads to excessive runout and non-compliance of the intermediate shaft during processing. Therefore, an expansion mechanism is provided inside the transmission rod 302 to eliminate the gap between the transmission rod 302 and the through hole.

[0027] In this embodiment, the expansion mechanism includes multiple triangular blocks 400, which are arranged in a circumferential array inside the transmission rod 302. A connecting rod 401 is fixedly connected to the other end of each triangular block 400, and a tensioning plate 402 is fixedly connected to the other end of the connecting rod 401. Specifically, the expansion execution component is the core structure for eliminating gaps, mainly composed of multiple sets of triangular compression blocks 504, rigid connecting rods 401, and arc-shaped tensioning plates 402. The multiple sets of triangular blocks 400 are evenly distributed in an array along the circumference of the inner cavity of the transmission rod 302, ensuring symmetrical and uniform radial expansion force and preventing excessive force on one side from causing the transmission rod 302 to deviate. The inclined surface of the triangular block 400 faces the central axis of the transmission rod 302, and the other end is rigidly connected to the connecting rod 401 by welding or threaded fastening. The end of the connecting rod 401 away from the triangular block 400 is fixed integrally with the arc-shaped tensioning plate 402. The curvature of the tensioning plate 402 perfectly matches the curvature of the inner wall of the through hole on the flange face 201. It is made of wear-resistant rigid material to ensure full contact with the inner wall of the through hole when tightened, increasing the contact area and distributing the force, which not only ensures the tightening force, but also prevents scratching the inner wall of the through hole.

[0028] When the triangular block 400 is subjected to radial extrusion force in the central direction, it will expand outward synchronously along the inclined plane. Through the connecting rod 401, it will push the tension plate 402 outward until the tension plate 402 is completely pressed against the inner wall of the through hole, completely eliminating all fitting gaps between the transmission rod 302 and the through hole, and preventing relative shaking or movement during the processing.

[0029] In this embodiment, the expansion mechanism also includes a compression component, which compresses multiple triangular blocks 400 to cause the tension plate 402 to expand outward.

[0030] In this embodiment, the extrusion assembly includes an extrusion rod 500 that movably passes through one end of the transmission rod 302. An extrusion head 501 is fixedly connected to one end of the extrusion rod 500 located outside the transmission rod 302, and an extrusion block 504 is fixedly connected to the other end of the extrusion rod 500 away from the extrusion head 501. A connecting disc 502 is fixedly sleeved on the outer surface of the extrusion rod 500. A first spring 503 is fixedly connected between the connecting disc 502 and the inner wall of one end of the transmission rod 302. The first spring 503 is sleeved on the outside of the extrusion rod 500. Specifically, the extrusion rod 500 movably passes through the center position of one end of the transmission rod 302 near the mounting base 301 and can freely extend and slide along the axial direction of the transmission rod 302 without radial play. One end of the extrusion rod 500, located outside the transmission rod 302, is fixedly connected to an arc-shaped extrusion head 501. The end face is rounded to prevent scratching the inner wall of the threaded hole during screwing. The other end of the extrusion rod 500, away from the extrusion head 501, is fixedly connected to an extrusion block 504. The tapered inclined surface precisely fits the inclined surface of the triangular block 400 to ensure smooth and efficient transmission of extrusion force. A rigid connecting disc 502 is fixedly sleeved on the outer surface of the extrusion rod 500. A reset first spring 503 is fixedly connected between the connecting disc 502 and the inner wall of the end of the transmission rod 302. The first spring 503 is tightly sleeved on the outside of the extrusion rod 500. In its natural state, the first spring 503 is in an extended state, which drives the extrusion block 504 away from the triangular block 400, keeping the expansion actuator in its initial contracted state.

[0031] As the transmission rod 302 is gradually screwed into the threaded hole of the mounting base 301, the extrusion head 501 first contacts the inner wall end face of the threaded hole. As the transmission rod 302 continues to tighten, the axial thrust pushes the extrusion head 501 to drive the extrusion rod 500 to retract into the inner cavity of the transmission rod 302. The first spring 503 is simultaneously compressed and contracts to store force. During the retraction of the extrusion rod 500, it drives the extrusion block 504 to move smoothly towards the triangular block 400. The conical inclined surface gradually extrudes the inclined surface of the triangular block 400, forcing the triangular block 400 to expand radially outward. Then, through the connecting rod 401, it pushes the tensioning plate 402 to complete the tensioning action. After processing, the transmission rod 302 is unscrewed in the reverse direction, the extrusion head 501 disengages from the inner wall of the threaded hole, the first spring 503 releases its elastic force and automatically resets, driving the extrusion rod 500 and extrusion block 504 to retract synchronously, the triangular block 400 loses its extrusion force, the tension plate 402 retracts accordingly, and the transmission rod 302 can be easily pulled out. The entire process realizes a fully automatic cycle of expansion-tightening-reset, which is convenient to operate and highly reliable.

[0032] In this embodiment, the expansion assembly also includes a guide assembly, which guides the movement of the tension plate 402, enabling the tension plate 402 to move stably in a straight line. Specifically, to ensure that the expansion and resetting process of the tension plate 402 is smooth and without problems such as skewing, jamming, or incomplete resetting, the expansion mechanism is equipped with a dedicated guide and resetting assembly to achieve directional radial movement and precise resetting of the tension plate 402.

[0033] In this embodiment, the guiding assembly includes a support rod fixedly connected to the inner wall of the transmission rod 302. A connecting block 600 is fixedly connected to one end of the support rod. A second spring 601 and a telescopic rod 602 are fixedly connected between the connecting block 600 and the tensioning plate 402. The second spring 601 is sleeved on the outside of the telescopic rod 602. Specifically, the tensioning plate 402 expands outward under the pushing force of the triangular block 400, and the telescopic guide rod extends outward synchronously, playing a directional guiding role. This strictly limits the radial linear movement of the tensioning plate 402, preventing circumferential deflection or skew, and ensuring uniform and symmetrical tension. When the triangular block 400 loses its compressive force, the second spring 601 quickly releases its elastic force, pulling the tensioning plate 402 smoothly inward to its initial position, ready for the next clamping use. This assembly effectively avoids jamming and offset problems in the expansion mechanism after long-term use, ensuring the stability and accuracy consistency of the tooling for repeated use, and extending the tooling's service life.

[0034] Working Principle: In use, the intermediate shaft 200 is clamped and fixed by the chuck 100 for machining. After clamping, the T-shaped slider 300 slides inside the T-shaped groove. The position of the mounting base 301 is adjusted so that the threaded hole on the mounting base 301 corresponds to the through hole on the flange face 201. The transmission rod 302 is passed through the through hole and one end is screwed into the threaded hole, thereby connecting the intermediate shaft 200 to the mounting base 301 on the chuck 100. This makes the intermediate shaft 200 relatively fixed to the chuck 100. When the intermediate shaft 200 is driven, there is no power jamming and the power transmission is uniform, reducing the impact of the intermediate shaft spinning during the initial movement. The power transmission is timely, and there is no relative movement between the shaft and the lathe spindle, ensuring that the runout of the intermediate shaft 200 is within the error range and improving the machining accuracy of the intermediate shaft 200.

[0035] When the transmission rod 302 is inserted into the threaded hole, when the extrusion head 501 contacts the inner wall of the threaded hole, as the transmission rod 302 is screwed in, the extrusion head 501 causes the extrusion rod 500 to retract into the transmission rod 302, causing the extrusion rod 500 to move the extrusion block 504. When the extrusion block 504 contacts the surface of the triangular block 400, as the extrusion block 504 moves, the triangular block 400 expands outward. The triangular block 400 causes the connecting rod 401 to expand the tension plate 402 outward, so that the tension plate 402 is tightened against the inner wall of the through hole, thereby eliminating the gap between the transmission rod 302 and the through hole.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An auxiliary tooling for machining a ship intermediate shaft, characterized in that, include: Chuck (100); Intermediate shaft (200), which is located outside the chuck (100), is clamped and processed by the chuck (100); A connecting component is located between the chuck (100) and the intermediate shaft (200), and the intermediate shaft (200) and the chuck (100) are fastened together by the connecting component.

2. The auxiliary tooling for machining a ship intermediate shaft according to claim 1, characterized in that, The connecting assembly includes a T-shaped slider (300), the outer surface of which is fixedly connected to a mounting base (301), the outer surface of which is provided with a threaded hole, and the end of the intermediate shaft (200) through which a transmission rod (302) passes, and the other end of the transmission rod (302) is threadedly connected to the inside of the threaded hole.

3. The auxiliary tooling for machining a ship intermediate shaft according to claim 2, characterized in that, The outer surface of the chuck (100) is provided with a T-shaped groove, and the T-shaped slider (300) is slidably connected to the inside of the T-shaped groove.

4. The auxiliary tooling for machining a ship intermediate shaft according to claim 2, characterized in that, The intermediate shaft (200) has a flange face (201) at its end. The outer surface of the flange face (201) has a through hole. The diameter of the through hole is larger than the diameter of the transmission rod (302). The through hole provides space for the transmission rod (302) to pass through.

5. The auxiliary tooling for machining a ship intermediate shaft according to claim 2, characterized in that, An expansion mechanism is provided inside the transmission rod (302) to eliminate the gap between the transmission rod (302) and the through hole.

6. The auxiliary tooling for machining a ship intermediate shaft according to claim 5, characterized in that, The expansion mechanism includes multiple triangular blocks (400), which are arranged in a circular array inside the transmission rod (302). The other end of each triangular block (400) is fixedly connected to a connecting rod (401), and the other end of the connecting rod (401) is fixedly connected to a tensioning plate (402).

7. The auxiliary tooling for machining a ship intermediate shaft according to claim 6, characterized in that, The expansion mechanism also includes a compression component, which compresses multiple triangular blocks (400) to cause the tension plate (402) to expand outward.

8. The auxiliary tooling for machining a ship intermediate shaft according to claim 7, characterized in that, The extrusion assembly includes an extrusion rod (500) that movably passes through one end of a transmission rod (302). An extrusion head (501) is fixedly connected to one end of the extrusion rod (500) located outside the transmission rod (302). An extrusion block (504) is fixedly connected to one end of the extrusion rod (500) away from the extrusion head (501). A connecting disc (502) is fixedly sleeved on the outer surface of the extrusion rod (500). A first spring (503) is fixedly connected between the connecting disc (502) and the inner wall of one end of the transmission rod (302). The first spring (503) is sleeved on the outside of the extrusion rod (500).

9. The auxiliary tooling for machining a ship intermediate shaft according to claim 8, characterized in that, The expansion assembly also includes a guide assembly, which guides the movement of the tension plate (402) so that the tension plate (402) moves in a stable linear motion.

10. An auxiliary tooling for machining a ship intermediate shaft according to claim 9, characterized in that, The guide assembly includes a support rod fixedly connected to the inner wall of the transmission rod (302). One end of the support rod is fixedly connected to a connecting block (600). A second spring (601) and a telescopic rod (602) are fixedly connected between the connecting block (600) and the tension plate (402). The second spring (601) is sleeved on the outside of the telescopic rod (602).

Images