A screw type shafting stopper

Abstract

This utility model discloses a spiral shaft system stopping device for stopping shaft system flanges. The shaft system flange has evenly spaced notches on its outer circumference. It includes a support arranged on the side of the flange, with an inner hole on the support. The device further includes: a lead screw horizontally arranged in the inner hole of the support, allowing only circumferential rotation, with its rear end extending out of the inner hole; a drive component fixedly installed at the rear end of the lead screw; and a stop pin installed at the front end of the lead screw. The stop pin and the lead screw are connected by a threaded structure, with the front end of the stop pin extending out of the inner hole. In this design, by threading the lead screw and the stop pin, the threaded structure is always hidden within the inner hole of the support. Therefore, the pitch on the lead screw can be made narrower and more precise, allowing for a large thrust with a small torque, enabling slight rotation of the shaft system. This design features a reasonable structure, simple installation, and reliable operation.

Description

Technical Field

[0001] This utility model relates to the field of ship shaft locking technology, and in particular to a spiral shaft system stop device. Background Technology

[0002] To prevent shaft rotation caused by water flow when ships are docked for extended periods, vessels with twin engines and twin propellers employ anti-shaft rotation devices to reduce wear on shaft components during single-propeller operation. Currently, the commonly used structure is a pin-type design. However, this device requires the flange notch or hole to be precisely aligned with the stop pin, making it difficult to use. Patent CN203497164U discloses a propeller shaft locking device. It uses a locking pin fixed to one end of a lead screw and a rotating handle fixed to the other end. Rotating the handle locks or unlocks the shaft by engaging the locking pin. However, in this design, the lead screw is threaded into the center hole of the locking block, and the locking pin, lead screw, and rotating handle are fixedly connected, moving synchronously. Therefore, the lead screw thread has poor precision, making it impossible to obtain a large thrust with a small torque. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a spiral shaft system stop device with a reasonable structure that can obtain a large thrust with a very small torque.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A spiral shaft system stop device is used to stop a shaft system flange. The outer circumference of the shaft system flange has evenly spaced notches. It includes a support disposed on the side of the shaft system flange, and the support has an inner hole. The device also includes:

[0006] A lead screw is horizontally arranged in the inner hole of the support in a manner that allows only circumferential rotation, with the rear end of the lead screw extending out of the inner hole;

[0007] The drive component is fixedly installed at the rear end of the lead screw;

[0008] A stop pin is installed at the front end of the lead screw. The stop pin and the lead screw are connected by a threaded structure, and the front end of the stop pin can extend out of the inner hole.

[0009] Preferably, the stop pin and the lead screw are connected by a multi-threaded structure.

[0010] Preferably, the device also includes a limit switch and a limit rod. The limit switch is fixedly installed at the rear end of the support and is used to connect to the main motor. A first through hole communicating with the inner hole is opened on the side wall of the support. One end of the limit rod is fixedly connected to the stop pin, and the other end of the limit rod passes through the first through hole. When the drive component drives the lead screw to rotate and move the stop pin to completely disengage from the notch of the shaft flange, the limit rod can trigger the limit switch.

[0011] Preferably, the limiting rod is fixedly installed at the rear end of the stop pin. When the driving component drives the lead screw to rotate and move the stop pin to the notch of the shaft flange, the rear end of the stop pin abuts against the rear end face of the inner hole of the support, and the limiting rod is located at the rear end of the first through hole. When the driving component drives the lead screw to rotate and move the stop pin to the notch of the shaft flange, the limiting rod is located at the front end of the first through hole.

[0012] Preferably, a first through cover is fixedly installed at the front end of the support. The first through cover has a second through hole. A stop pin passes through the second through hole of the first through cover. The mating surface between the stop pin and the second through hole of the first through cover is polygonal.

[0013] Preferably, the lead screw is supported at the rear end of the support by at least one planar thrust bearing.

[0014] Preferably, the shape of the front end of the stop pin is adapted to the shape of the notch on the shaft flange.

[0015] Preferably, the driving component is a handwheel.

[0016] Preferably, a second through cover is fixedly installed at the rear end of the support, and a third through hole is provided on the second through cover, through which the lead screw passes.

[0017] Preferably, the support is fixedly connected to the hull structure by fasteners.

[0018] This utility model, by adopting the above technical solution, has the following beneficial effects: In this solution, by connecting the lead screw and the stop pin by thread, the thread structure can always be hidden in the inner hole of the support, ignoring corrosion from the external environment. Therefore, the pitch on the lead screw can be made narrower and more precise, so that a large thrust can be obtained with a small torque, and the shaft system can be rotated slightly. This solution has the characteristics of reasonable structure, simple installation, and reliable use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0021] Reference numerals: 1. Drive component; 2. Lead screw; 3. Limit switch; 4. Planar thrust bearing; 5. Limit rod; 6. Support; 61. Inner hole; 62. First through hole; 7. First through cover; 8. Stop pin; 9. Second through cover; 10. Shaft flange; 101. Notch. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In this utility model, for clarity, the direction in which the stop pin of the spiral stop device is inserted into the notch in the shaft flange is considered the front, and the reverse direction is considered the back.

[0028] like Figure 1 and Figure 2 The diagram shows a spiral shaft stop device for stopping a shaft flange 10. The shaft flange 10 has evenly spaced notches 101 on its outer circumference. It includes a support 6 arranged on the side of the shaft flange 10, and the support 6 has an inner hole 61. The device also includes:

[0029] The lead screw 2 is horizontally arranged in the inner hole 61 of the support 6 in a manner that allows only circumferential rotation, with the rear end of the lead screw 2 extending out of the inner hole 61;

[0030] Drive component 1 is fixedly installed at the rear end of lead screw 2;

[0031] The stop pin 8 is installed at the front end of the lead screw 2. The stop pin 8 and the lead screw 2 are connected by a threaded structure. The front end of the stop pin 8 can extend out of the inner hole 61.

[0032] In this design, by threading the lead screw 2 and the stop pin 8, the threaded structure can always be hidden within the inner hole 61 of the support 6, ignoring external environmental factors such as corrosion. Therefore, in this design, the pitch on the lead screw 2 can be made narrower and more precise, thus obtaining a large thrust with a small torque. Slight rotation of the shaft system adjusts the position of the notch 101 on the shaft flange 10, allowing the head of the stop pin 8 to automatically align with the notch 101 of the shaft flange 10. Furthermore, the threaded drive structure has a self-locking function; if the drive component 1 does not rotate in the opposite direction, the stop pin 8 will remain in the same position, preventing failure.

[0033] To keep the shaft system stationary, the shape of the front end of the stop pin 8 is adapted to the shape of the notch 101 of the shaft flange 10. Specifically, the notch 101 of the shaft flange 10 is a radial tapered groove, and the front end of the stop pin 8 is set in a double-bevel shape.

[0034] Because the pitch of the lead screw 2 in this design is narrower and more precise, rotating the lead screw 2 will make the horizontal displacement speed of the stop pin 8 slower. Therefore, in this design, the stop pin 8 and the lead screw 2 are connected by a multi-threaded transmission structure, thereby accelerating the horizontal movement speed of the stop pin 8 and significantly shortening the operation time of this stop device.

[0035] In this design, the stop device also includes a limit switch 3 and a limit rod 5. The limit switch 3 is fixedly installed at the rear end of the support 6 and is used to connect to the main unit. The support 6 has a first through hole 62 communicating with the inner hole 61 on its side wall. One end of the limit rod 5 is fixedly connected to the stop pin 8, and the other end of the limit rod 5 passes through the first through hole 62. When the drive component 1 drives the lead screw 2 to rotate and move the stop pin 8 to the notch 101 of the shaft flange 10, the limit rod 5 can trigger the limit switch 3. In this way, the limit switch 3 can send a signal to the main unit to allow the gearbox to engage, thus avoiding accidental engagement due to the limit switch 3 being disconnected, which could cause equipment accidents.

[0036] Specifically, the limiting rod 5 is fixedly installed at the rear end of the stop pin 8. When the driving component 1 drives the lead screw 2 to rotate and move the stop pin 8 to the notch 101 of the shaft flange 10 completely disengaged, the rear end of the stop pin 8 abuts against the rear end face of the inner hole of the support 6, and the limiting rod 5 is located at the rear end of the first through hole 62. When the driving component 1 drives the lead screw 2 to rotate and move the stop pin 8 to the notch 101 of the shaft flange 10 completely engaged, the limiting rod 5 is located at the front end of the first through hole 62. In this way, the length of the first through hole 62 is the travel distance of the stop pin 8, which can prevent the stop pin 8 from moving excessively and limit the travel distance of the stop pin 8.

[0037] The installation position of the limit switch 3 is not limited. Preferably, the limit switch 3 is installed on the side wall of the support 6 where the first through hole 62 is opened, and the limit rod 5 and the limit switch 3 are located on the same side wall of the support 6. Of course, in this solution, another limit switch can be set at the front end of the support 6. When the drive component 1 drives the lead screw 2 to rotate and move the stop pin 8 to fully engage with the notch 101 of the shaft flange 10, the limit rod 5 can trigger the limit switch, thus indicating that the stop pin 8 has moved into place.

[0038] To ensure that the stop pin 8 does not rotate during movement, a first through cover 7 is fixedly installed at the front end of the support 6. The first through cover 7 has a second through hole, through which the stop pin 8 passes. The mating surface between the stop pin 8 and the second through hole of the first through cover 7 is polygonal. This polygonal shape includes, but is not limited to, triangles, rectangles, and rhombuses. A second through cover 9 is fixedly installed at the rear end of the support 6. The second through cover 9 has a third through hole, through which the lead screw 2 passes.

[0039] The lead screw 2 is supported at the rear end of the support 6 by at least one planar thrust bearing 4, which bears the thrust generated by the stop pin 8 when the shaft system is slightly rotated.

[0040] The driving component 1 can be a manual component or an electric component. In this embodiment, the driving component 1 is a handwheel.

[0041] The support 6 is fixedly connected to the hull structure by fasteners such as bolts, thereby being able to withstand the impact force of water flow on the propeller.

[0042] The method of using the stop device in this solution is as follows:

[0043] 1. When it is necessary to lock the shaft system, turn the handwheel forward. The rotation of the handwheel will change the rotational movement of the lead screw 2 into the horizontal movement of the stop pin 8. The stop pin 8 moves forward and gets into the notch 101 of the shaft flange 10, locking the shaft system in place.

[0044] 2. When it is necessary to unlock the shaft system, turn the handwheel in the opposite direction to drive the stop pin 8 to move backward and disengage from the notch 101 of the shaft system flange 10. At the same time, the limit rod 5 touches the contact of the limit switch 3, and the limit switch 3 sends a signal to allow the gearbox in the shaft system to engage and the shaft system to run.

[0045] All features described in the specification, appended claims and drawings, whether individually or in any combination thereof, are essential features of this utility model.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "one implementation," "specific implementation," "other implementation," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment, implementation, or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described above can also be combined in any suitable manner in one or more embodiments, implementations, or examples. The technical solutions described in this utility model also include technical solutions formed by any one or more specific features, structures, materials, or characteristics described above, either individually or in combination.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, alterations, deletions of some features, additions of features, or recombinations of features to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the innovative principles of the present invention shall still fall within the scope of the technical solutions of the present invention.

Claims

1. A spiral shaft system stop device for stopping a shaft system flange (10), wherein notches (101) are evenly distributed on the outer periphery of the shaft system flange (10), and a support (6) is arranged on the side of the shaft system flange (10), the support (6) having an inner hole (61), characterized in that, Also includes: The lead screw (2) is horizontally arranged in the inner hole (61) of the support (6) in a manner that allows only circumferential rotation, with the rear end of the lead screw (2) extending out of the inner hole (61). The drive component (1) is fixedly installed at the rear end of the lead screw (2); The stop pin (8) is installed at the front end of the lead screw (2). The stop pin (8) and the lead screw (2) are connected by a threaded structure. The front end of the stop pin (8) can extend out of the inner hole (61).

2. The spiral shaft system stop device according to claim 1, characterized in that, The stop pin (8) and the lead screw (2) are connected by a multi-threaded structure.

3. The spiral shaft system stop device according to claim 1, characterized in that, It also includes a limit switch (3) and a limit rod (5). The limit switch (3) is fixedly installed at the rear end of the support (6). The limit switch (3) is used to connect with the main motor. A first through hole (62) communicating with the inner hole (61) is opened on the side wall of the support (6). One end of the limit rod (5) is fixedly connected to the stop pin (8), and the other end of the limit rod (5) passes through the first through hole (62). When the drive component (1) drives the screw (2) to rotate and drive the stop pin (8) to move to the notch (101) that is completely disengaged from the shaft flange (10), the limit rod (5) can trigger the limit switch (3).

4. A spiral shaft system stop device according to claim 3, characterized in that, The limiting rod (6) is fixedly installed at the rear end of the stop pin (8). When the driving component (1) drives the screw (2) to rotate and move the stop pin (8) to the notch (101) of the shaft flange (10) to be completely disengaged, the rear end of the stop pin (8) abuts against the rear end face of the inner hole of the support (6), and the limiting rod (5) is located at the rear end of the first through hole (62). When the driving component (1) drives the screw (2) to rotate and move the stop pin (8) to the notch (101) of the shaft flange (10) to be completely engaged, the limiting rod (5) is located at the front end of the first through hole (62).

5. A spiral shaft system stop device according to claim 1, characterized in that, The front end of the support (6) is fixedly installed with a first through cover (7), and a second through hole is provided on the first through cover (7). The stop pin (8) passes through the second through hole of the first through cover (7), and the mating surface of the stop pin (8) and the second through hole of the first through cover (7) is polygonal.

6. A spiral shaft system stop device according to claim 1, characterized in that, The lead screw (2) is supported at the rear end of the support (6) by at least one planar thrust bearing (4).

7. A spiral shaft system stop device according to claim 1, characterized in that, The shape of the front end of the stop pin (8) is adapted to the shape of the notch (101) of the shaft flange (10).

8. A spiral shaft system stop device according to claim 1, characterized in that, The driving component (1) is a handwheel.

9. A spiral shaft system stop device according to claim 1, characterized in that, The second through cover (9) is fixedly installed at the rear end of the support (6). The second through cover (9) has a third through hole, and the screw rod (2) passes through the third through hole of the second through cover (9).

10. A spiral shaft system stop device according to claim 1, characterized in that, The support (6) is fixedly connected to the hull structure by fasteners.

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