Transmission gear box with limit protection for constant tension winch

Abstract

The present application relates to the technical fields of transmission gear box, and particularly discloses a constant tension winch transmission gear box with limiting protection, which comprises a box body, an input shaft connected to the inside of the box body through one end bearing, and the other end bearing of the input shaft penetrating to the outside of the box body, a transmission gear connected to the outside of the input shaft in the box body through a key, a shaft sleeve connected to the bearing in the box body, a driven gear connected to the outside of the shaft sleeve through a key, the driven gear being engaged with the transmission gear, a screw sleeve connected to the inside of the shaft sleeve through a synchronous rotating mechanism, the synchronous rotating mechanism comprising a transmission sleeve movably sleeved to the outside of the screw sleeve, an output shaft movably sleeved to the outside of one end of the screw sleeve, and the output shaft penetrating to the outside of the box body through a bearing. The present application can prevent the driven gear from driving the output shaft to rotate after the cable is tightened, thereby avoiding the overwinding of the cable and causing the transmission gear box to malfunction.

Description

Technical Field

[0001] This invention relates to the field of transmission gearbox technology, specifically to a transmission gearbox for a constant tension winch with limit protection. Background Technology

[0002] In the field of modern marine engineering and ship operations, winches, as the core hoisting equipment for winding and unwinding cables, wire ropes and underwater flexible loads, are one of the key deck machines for marine survey vessels, scientific research vessels and offshore operation platforms. Among them, shipboard hydrological and geological survey winches are specifically used for winding and unwinding cables carrying sensors and tension management in marine hydrological observation, seabed geological sampling and underwater topographic survey operations. Their operational reliability directly determines the quality of survey data and operational safety.

[0003] The constant tension control function of ship hydrological and geological survey winches relies on the transmission gearbox to transmit the speed and torque of the power source to the drum. During load fluctuations, ship pitching and rolling, water level changes, and cable winding and unwinding, the gearbox's deceleration and torque amplification action, in conjunction with the control system, achieves dynamic adjustment and constant maintenance of the cable tension. As the core transmission component of the constant tension winch, the structural stability and operational safety of the transmission gearbox directly affect the tension control accuracy and operational continuity of the entire winch system.

[0004] Existing transmission gearboxes for constant tension winches, such as the one disclosed in publication number CN115585245A, have a simple structure, are economical and practical, easy to install and maintain, and have high reliability.

[0005] However, the transmission gearbox of the existing constant tension winch is prone to damage when the cable is stretched too much. This is because it does not have a limit structure and only uses limit switches or stops for limiting. When using limit switches, it is easy to fail after electrical damage, while when using stops, the impact is too large and the teeth are easy to break. In addition, the constant tension system will also be affected by impact.

[0006] Therefore, a transmission gearbox for constant tension winches with limit protection is needed to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a transmission gearbox for a constant tension winch with limit protection, so as to solve the problem mentioned in the background art that the existing transmission gearboxes for constant tension winches do not have a limit mechanism, which easily leads to gearbox failure.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A transmission gearbox for a constant tension winch with limit protection includes a housing and an input shaft with a bearing at one end connected inside. The bearing at the other end of the input shaft extends to the outside of the housing. A transmission gear is keyed to the outside of the input shaft inside the housing. A bushing is connected to the bearing inside the housing, and a driven gear is keyed to the outside of the bushing. The driven gear meshes with the transmission gear. A threaded sleeve is connected to the inside of the bushing via a synchronous rotation mechanism. The synchronous rotation mechanism includes a transmission sleeve movably fitted outside the threaded sleeve. An output shaft is movably fitted to the outside of one end of the threaded sleeve. The output shaft bearing extends to the outside of the housing. The threaded sleeve and the output shaft are also limited by an insert bar and an insert groove. The insert bar is angularly positioned inside the output shaft, and the insert groove is angularly positioned outside the threaded sleeve. The insert bar is engaged and slidably connected within the corresponding insert groove. The transmission sleeve is provided with a limit self-releasing mechanism for disconnecting the synchronous rotation mechanism. The synchronous rotation mechanism includes mounting grooves angularly distributed within the transmission sleeve.

[0010] Preferably, the ratio of the number of teeth of the driven gear to the number of teeth of the transmission gear is greater than 1, which is used to increase the torque when the output shaft rotates.

[0011] Preferably, the synchronous rotation mechanism further includes strip-shaped grooves evenly distributed on the inner side of the bushing, and each strip-shaped groove is slidably connected to a corresponding strip-shaped slider, which is evenly distributed on the outer side of the transmission sleeve.

[0012] Preferably, the outer side of the threaded sleeve has slots distributed at equal angles, and each slot is fitted with a corresponding locking block. A support frame is fixedly connected to the locking block, and the support frame extends movably into the mounting groove.

[0013] Preferably, the card slot and the corresponding card block are also connected by magnetic attraction, so that the card block has the tendency to move into the corresponding card slot.

[0014] Preferably, the limiting self-releasing mechanism further includes a limiting rod provided in each mounting slot, a guide frame provided in each mounting slot, a limiting frame integrally fixedly connected to the guide frame, the limiting frame being movably penetrated by the corresponding limiting rod, and springs provided between the two sides of the limiting frame and the inner side corresponding to the mounting slot, the springs being movably sleeved on the outer side of the limiting rod.

[0015] Preferably, the guide frame is provided with a guide groove with a similar shape, the support frame is movably provided through the corresponding guide groove, and the end of the support frame that contacts the corresponding guide groove is a roller assembly, which is used to drive the support frame to move stably when the guide frame moves.

[0016] Preferably, both ends of the guide frame are fixedly connected to pressure guide rods, which are movably disposed through the transmission sleeve, and the pressure guide rods on the same side are connected to each other by pressure bearing rings.

[0017] Preferably, a lead screw is threaded through the sleeve, one end of the lead screw is fixedly connected to the inside of the housing, and the lead screw is coaxial with the sleeve.

[0018] Preferably, the lead screw is disposed through one end of the bushing, the output shaft is disposed at the other end of the bushing, the inner diameter of the pressure ring is larger than the inner diameter of the end opening of the bushing through which the lead screw passes, and the inner and outer diameters of the pressure ring are equal to the inner and outer diameters of the output shaft, respectively.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the transmission gearbox for the constant tension winch with limit protection can prevent the driven gear from driving the output shaft to rotate after the cable is tightened, thereby avoiding excessive winding of the cable and causing the transmission gearbox to malfunction. This prevents the winch from continuing to force winding and breaking the cable or damaging underwater precision instruments, effectively ensuring the operational safety and reliability of the constant tension winch system under complex sea conditions, and avoiding the interruption of survey operations and equipment loss due to gearbox overload failure.

[0020] During the process of the transmission gear driving the driven gear to rotate, the bushing drives the transmission sleeve to rotate through the engagement and sliding connection of the strip groove and the strip slider. The transmission sleeve drives the threaded sleeve to rotate through the engagement of the locking block and the locking groove. At this time, the threaded sleeve can drive the output shaft to rotate through the sliding engagement of the insert bar and the insert groove. During this process, because the threaded sleeve rotates, it will rotate on the screw and move along its axis. When the pressure ring is squeezed, it means that the process of winding the cable is about to be completed. As the pressure ring is gradually squeezed, it will drive the guide frame to move through the pressure guide rod, which will cause the support frame to move on the guide groove. This will cause the locking block connected to the support frame to gradually move away from the locking groove, so that the transmission sleeve can no longer drive the threaded sleeve to rotate. That is to say, the output shaft no longer rotates at this time, and thus no longer applies torque to the cable winding roller, thereby avoiding the failure of the transmission gearbox of the constant tension winch. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rear view structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the housing of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure between the transmission gear and the driven gear of the present invention;

[0025] Figure 5This is a schematic cross-sectional view of the connection between the housing and the output shaft of the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged structural diagram of point A in the middle;

[0027] Figure 7 This is a schematic diagram of the connection structure between the output shaft and the screw sleeve of the present invention;

[0028] Figure 8 This is a partial structural diagram of the connection between the housing and the screw sleeve of the present invention;

[0029] Figure 9 For the present invention Figure 8 A magnified structural diagram of point B in the middle.

[0030] In the diagram: 1. Housing; 2. Input shaft; 3. Output shaft; 4. Transmission gear; 5. Driven gear; 6. Bushing; 7. Lead screw; 8. Screw sleeve; 9. Embedded strip; 10. Embedded groove; 11. Strip-shaped slide groove; 12. Strip-shaped slider; 13. Transmission sleeve; 14. Guide rod; 15. Pressure bearing ring; 16. Locking block; 17. Locking groove; 18. Limiting rod; 19. Limiting frame; 20. Spring; 21. Guide frame; 22. Guide through groove; 23. Support frame; 24. Mounting groove. Detailed Implementation

[0031] 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.

[0032] Please see Figures 1-9 The present invention provides the following technical solution:

[0033] Example 1: To address the problem that in conventional constant tension winch transmission gearboxes, the driven gear 5 is directly fixedly connected to the output shaft 3, causing the driven gear 5 to continuously apply torque to the output shaft 3 when the transmission gear 4 rotates, easily leading to damage to the transmission gearbox, the following technical solution is provided: a constant tension winch transmission gearbox with limit protection, comprising a housing 1 and an input shaft 2 with one end bearing connected inside it, the other end bearing of the input shaft 2 extending to the outside of the housing 1, a transmission gear 4 keyed to the outside of the input shaft 2 inside the housing 1, and a shaft connected to the bearing inside the housing 1. The outer side of sleeve 6 is keyed with driven gear 5, which meshes with transmission gear 4. The inner side of sleeve 6 is connected to threaded sleeve 8 through a synchronous rotation mechanism. The synchronous rotation mechanism includes a transmission sleeve 13 movably sleeved on the outer side of threaded sleeve 8. One end of threaded sleeve 8 is movably sleeved with output shaft 3. The output shaft 3 bearing extends through to the outside of housing 1. Threaded sleeve 8 and output shaft 3 are also limited by embedded strip 9 and embedded groove 10. Embedded strip 9 is set at equal angles on the inner side of output shaft 3, and embedded groove 10 is set at equal angles on the outer side of threaded sleeve 8. Embedded strip 9 is engaged and slidably connected in the corresponding embedded groove 10.

[0034] The gear ratio of the driven gear 5 to the transmission gear 4 is greater than 1, which is used to increase the torque when the output shaft 3 rotates. The synchronous rotation mechanism also includes strip grooves 11 that are evenly distributed on the inner side of the bushing 6. Each strip groove 11 is slidably connected to a corresponding strip slider 12. The strip sliders 12 are evenly distributed on the outer side of the transmission sleeve 13. The outer side of the screw sleeve 8 is evenly distributed with slots 17. Each slot 17 is engaged with a corresponding block 16. A support frame 23 is fixedly connected to the block 16. The support frame 23 extends movably into the mounting groove 24. The slots 17 and the corresponding blocks 16 are also connected by magnetic attraction, which is used to make the blocks 16 have the tendency to move into the corresponding slots 17.

[0035] according to Figure 1-6 In the field of marine engineering, shipboard hydrological and geological survey winches can rotate the winding rollers by starting a constant tension motor.

[0036] When the constant tension motor is running, the transmission gear 4 with a smaller number of gears will be driven to rotate through the input shaft 2, and the transmission gear 4 will drive the driven gear 5 with a larger number of gears to rotate through meshing connection.

[0037] By using a transmission gear 4 with a smaller number of teeth to drive a driven gear 5 with a larger number of teeth, the output torque of the driven gear 5 can be increased.

[0038] When the driven gear 5 rotates, the bushing 6 connected to it rotates synchronously. The inner side of the bushing 6 is connected to the transmission sleeve 13 through the sliding connection of the strip groove 11 and the strip slider 12, so that the transmission sleeve 13 can rotate synchronously with the bushing 6.

[0039] When the transmission sleeve 13 rotates, the locking block 16 indirectly provided on it is locked in the slot 17, so that the threaded sleeve 8 with the slot 17 can rotate synchronously with the transmission sleeve 13.

[0040] When the screw sleeve 8 rotates, its output shaft 3, which is connected to the insert strip 9 and the insert groove 10 through a sliding engagement, can rotate synchronously, thereby driving the take-up roller to rotate.

[0041] Compared to directly connecting the driven gear 5 to the output shaft 3, the above-mentioned transmission method can prevent the driven gear 5 from rotating synchronously by separating the locking block 16 from the locking groove 17. This ensures that the winding roller is no longer subjected to torsional force after the winding cable reaches its limit, thus preventing the transmission gearbox from malfunctioning.

[0042] Example 2: To solve the problem of separation between the card block 16 and the card slot 17 in Example 1, the following technical solution is provided: Specifically, the transmission sleeve 13 is provided with a limit self-releasing mechanism for disconnecting the transmission of the synchronous rotation mechanism. The synchronous rotation mechanism includes mounting slots 24 that are evenly distributed within the transmission sleeve 13.

[0043] The self-releasing limiting mechanism also includes a limiting rod 18 installed in each mounting slot 24, a guide frame 21 installed in each mounting slot 24, a limiting frame 19 integrally fixedly connected to the guide frame 21, the limiting frame 19 being movably penetrated by the corresponding limiting rod 18, springs 20 being installed between the two sides of the limiting frame 19 and the corresponding inner sides of the mounting slot 24, the springs 20 being movably sleeved on the outer side of the limiting rod 18, a guide groove 22 with a similar shape being provided on the guide frame 21, a support frame 23 being movably penetrated through the corresponding guide groove 22, and the end of the support frame 23 that contacts the corresponding guide groove 22 being a roller assembly. When the guide frame 21 moves, the drive support frame 23 moves stably. Both ends of the guide frame 21 are fixedly connected to the pressure guide rods 14. The pressure guide rods 14 are movably connected through the transmission sleeve 13. The pressure guide rods 14 on the same side are connected to each other by the pressure bearing ring 15. The screw sleeve 8 is threaded through the lead screw 7. One end of the lead screw 7 is fixedly connected to the inside of the housing 1. The lead screw 7 is coaxially arranged with the bushing 6. The lead screw 7 is movably connected through one end of the bushing 6. The output shaft 3 is located at the other end of the bushing 6. The inner diameter of the pressure bearing ring 15 is larger than the inner diameter of the end opening of the bushing 6 through which the lead screw 7 passes. The inner and outer diameters of the pressure bearing ring 15 are equal to the inner and outer diameters of the output shaft 3, respectively.

[0044] according to Figure 5-9 When in use, the screw sleeve 8 will rotate synchronously with the transmission sleeve 13. Since the screw sleeve 8 is threadedly connected to the lead screw 7, the screw sleeve 8 will move gradually along the axial direction of the lead screw 7. In other words, the screw sleeve 8 will rotate and move at the same time.

[0045] During the movement of the screw sleeve 8, the transmission sleeve 13 will slide on the strip groove 11 through the strip slider 12, so that the transmission sleeve 13 will also rotate and move at the same time.

[0046] As the transmission sleeve 13 rotates and moves, the pressure ring 15 on it rotates and moves synchronously. When the pressure ring 15 gradually approaches and contacts the end opening of the bushing 6 through which the lead screw 7 passes or the output shaft 3, the guide frame 21 will be squeezed and moved accordingly.

[0047] When the guide frame 21 moves, it not only squeezes the spring 20 on one side through the limit frame 19, but also guides the support frame 23 through the guide groove 22 on it, causing the support frame 23 to move synchronously with the locking block 16, thereby causing the locking block 16 to gradually separate from the locking groove 17.

[0048] When the card block 16 is completely separated from the card slot 17, the transmission sleeve 13 will continue to rotate with the bushing 6. However, at this time, the transmission sleeve 13 can no longer drive the screw sleeve 8 to rotate, thereby preventing the screw sleeve 8 from driving the output shaft 3 to rotate.

[0049] At this point, output shaft 3 will no longer be able to apply torque to the take-up roller, thus avoiding transmission gearbox failure due to excessive tension of the cable.

[0050] During the above process, due to the magnetic attraction between the locking block 16 and the slot 17, and the tendency of the spring 20 to return to its original state, the locking block 16 tends to engage with the slot 17. However, since the lead screw 7 has a self-locking function, it can ensure that the locking block 16 and the slot 17 are stably separated.

[0051] In this technical solution, the bearing in the bearing connection is a deep groove ball bearing, and the specific working process is as follows:

[0052] One end of the cable is connected to the goods or equipment to be lifted, while the other end is connected to the take-up roller. After the constant tension motor is started, the input shaft 2 rotates accordingly. The input shaft 2 drives the bushing 6 to rotate through the meshing connection of the transmission gear 4 and the driven gear 5. The bushing 6 drives the output shaft 3 to rotate through the sliding connection of the strip groove 11 and the strip slider 12, the engaging connection of the locking block 16 and the locking groove 17, and the engaging sliding connection of the embedding strip 9 and the embedding groove 10. When the output shaft 3 rotates, the take-up roller connected to it rotates synchronously, thereby realizing the winding of the cable. During the winding process, the cable lifts goods or equipment. During the winding process, the screw sleeve 8 and the transmission sleeve 13 rotate and move at the same time. After the pressure ring 15 is squeezed by the end opening of the bushing 6 through which the screw 7 passes or by the output shaft 3, it is guided by the guide groove 22 to the support frame 23, which drives the locking block 16 and the locking groove 17 to separate. At this time, it can prevent the winding roller from continuing to rotate after the cable is wound to the limit. This can prevent the cable from breaking and causing safety hazards, and also prevent damage to the transmission structure inside the transmission gearbox, which would lead to the failure of the transmission gearbox.

[0053] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0054] 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. A transmission gearbox for a constant tension winch with limit protection, comprising a housing (1) and an input shaft (2) with one end bearing connected inside it, the other end bearing of the input shaft (2) extending to the outside of the housing (1), and a transmission gear (4) keyed to the outside of the input shaft (2) inside the housing (1), characterized in that: The housing (1) is connected to a bearing sleeve (6). A driven gear (5) is keyed to the outside of the bearing sleeve (6). The driven gear (5) meshes with the transmission gear (4). A threaded sleeve (8) is connected to the inside of the bearing sleeve (6) via a synchronous rotation mechanism. The synchronous rotation mechanism includes a transmission sleeve (13) movably sleeved on the outside of the threaded sleeve (8). An output shaft (3) is movably sleeved on the outside of one end of the threaded sleeve (8). The output shaft (3) is pierced through the bearing to the outside of the housing (1). The threaded sleeve (8) The output shaft (3) is also limited by an insert strip (9) and an insert groove (10). The insert strip (9) is set at equal angles on the inner side of the output shaft (3), and the insert groove (10) is set at equal angles on the outer side of the screw sleeve (8). The insert strip (9) is engaged and slidably connected in the corresponding insert groove (10). The transmission sleeve (13) is provided with a limiting self-loosening mechanism for disconnecting the synchronous rotation mechanism transmission. The synchronous rotation mechanism includes mounting grooves (24) distributed at equal angles in the transmission sleeve (13).

2. The transmission gearbox for a constant tension winch with limit protection according to claim 1, characterized in that: The ratio of the number of teeth of the driven gear (5) to the number of teeth of the transmission gear (4) is greater than 1, which is used to increase the torque when the output shaft (3) rotates.

3. The transmission gearbox for a constant tension winch with limit protection according to claim 1, characterized in that: The synchronous rotation mechanism also includes strip grooves (11) that are evenly distributed on the inner side of the bushing (6). Each strip groove (11) is slidably connected to a corresponding strip slider (12), and the strip sliders (12) are evenly distributed on the outer side of the transmission sleeve (13).

4. A transmission gearbox for a constant tension winch with limit protection according to claim 3, characterized in that: The outer side of the screw sleeve (8) is provided with slots (17) at equal angles. Each slot (17) is connected to a corresponding block (16). A support frame (23) is fixedly connected to the block (16). The support frame (23) extends into the mounting groove (24).

5. A transmission gearbox for a constant tension winch with limit protection according to claim 4, characterized in that: The card slot (17) and the corresponding card block (16) are also connected by magnetic attraction, so that the card block (16) has the tendency to move into the corresponding card slot (17).

6. A transmission gearbox for a constant tension winch with limit protection according to claim 5, characterized in that: The limiting self-releasing mechanism also includes a limiting rod (18) provided in each mounting slot (24), a guide frame (21) provided in each mounting slot (24), a limiting frame (19) integrally fixedly connected to the guide frame (21), the limiting frame (19) being movably penetrated by the corresponding limiting rod (18), and springs (20) provided between the two sides of the limiting frame (19) and the inner side corresponding to the mounting slot (24), the springs (20) being movably sleeved on the outer side of the limiting rod (18).

7. A transmission gearbox for a constant tension winch with limit protection according to claim 6, characterized in that: The guide frame (21) is provided with a guide groove (22) similar in shape. The support frame (23) is movably connected through the corresponding guide groove (22). The end of the support frame (23) that contacts the corresponding guide groove (22) is a roller assembly, which is used to drive the support frame (23) to move stably when the guide frame (21) moves.

8. A transmission gearbox for a constant tension winch with limit protection according to claim 6, characterized in that: Both ends of the guide frame (21) are fixedly connected with pressure guide rods (14). The pressure guide rods (14) are movably connected through the transmission sleeve (13). The pressure guide rods (14) on the same side are connected to each other through pressure bearing rings (15).

9. A transmission gearbox for a constant tension winch with limit protection according to claim 8, characterized in that: The threaded sleeve (8) has a lead screw (7) threaded through it. One end of the lead screw (7) is fixedly connected to the inside of the housing (1). The lead screw (7) and the bushing (6) are coaxially arranged.

10. A transmission gearbox for a constant tension winch with limit protection according to claim 9, characterized in that: The lead screw (7) is movably connected through one end of the bushing (6), and the output shaft (3) is located at the other end of the bushing (6). The inner diameter of the pressure ring (15) is larger than the inner diameter of the end opening of the bushing (6) through which the lead screw (7) passes. The inner and outer diameters of the pressure ring (15) are equal to the inner and outer diameters of the output shaft (3), respectively.

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