Position-limiting protective constant tension winch transmission gear box

Abstract

The application discloses a constant-tension winch transmission gear box with limiting protection, and relates to the field of transmission gear boxes.The constant-tension winch transmission gear box with limiting protection comprises a box body, an input shaft and an output shaft, the input shaft is installed at the back side of the box body, the output shaft is installed at the front side of the box body, the input shaft and the output shaft are both rotationally connected with the box body, the front end of the input shaft is fixedly provided with a first gear, the right side of the first gear is engaged with a second gear, the middle part of the second gear is fixedly provided with a mounting shaft, the front side of the mounting shaft is fixedly provided with a third gear, and the left side of the third gear is engaged with a fourth gear.The constant-tension winch transmission gear box with limiting protection realizes primary reduction through the cooperation of the first gear and the second gear, realizes secondary reduction through the cooperation of the third gear and the fourth gear, and realizes tertiary reduction through the cooperation of a fifth gear and a sixth gear.The transmission effect can be adjusted according to the use requirement, so that the power of the output shaft can be adjusted and the transmission effect can be fully utilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission gear box, in particular to a constant tension winch transmission gear box with limiting protection. BACKGROUND

[0002] The transmission gear box is a core component in the mechanical transmission system, and its main function is to change the speed and torque to meet the operation requirements of different mechanical equipment. In the field of automatic equipment such as transportation and hoisting winch, the transmission gear box plays a crucial role and can also be used with constant tension winch to control the transmission of the winch.

[0003] The prior art 1 (Chinese invention patent with the application number CN202211324865.4, published on January 10, 2023) is a gear box for constant tension winch. The gear box body is welded from steel plates, and the cover plate is fixed on the gear box body by screws and washers. The gear box cavity contains one large gear and one small gear with complete meshing external teeth. Each gear is fixed by bearings at both ends. The outer part of the gear box is installed with a lifting motor and a constant tension motor. The internal teeth of the small gear mesh with the output shaft of the constant tension motor. The internal teeth of the large gear and the outer ring of the freewheel are fixed by screws. The inner ring of the freewheel meshes with the output shaft of the lifting motor. The output shaft of the large gear meshes with the speed reducer. The freewheel has the characteristic of one-way rotation. When the output shaft of the lifting motor rotates forward, it drives the inner ring of the freewheel to rotate, and the outer ring of the freewheel synchronizes with the inner ring, thereby driving the large gear to rotate, and the winch retracts the rope and lifts the cargo. The prior art 2 (Chinese utility model patent with the application number CN202223173349.4, published on April 7, 2023) is a gear box with a protection device, which includes a gear box body, a transmission shaft, a protection and limiting mechanism, and a protection shell. The transmission shaft is set inside the gear box body, and its right end extends to the outside of the gear box body. The protection and limiting mechanism is set on the gear box body and includes a protection shell, installation blocks, clamping grooves, clamping blocks, pulling blocks, fixing rods, fixing blocks, limiting blocks, limiting grooves, and elastic members. This application facilitates the protection of the transmission shaft, avoids damage to the transmission shaft during transportation, improves the protection effect, and makes the protection and limiting mechanism reusable, avoiding resource waste and improving practicality.

[0004] The current transmission gear box has a constant reduction effect inside, which cannot reduce the speed and increase the torque when the weight of the hoisted object increases, and cannot increase the speed when the weight of the hoisted object decreases, resulting in insufficient utilization of the motor transmission and damage to the motor. SUMMARY

[0005] The present application aims to provide a constant tension winch transmission gear box with limiting protection, to solve the problem that the transmission of the motor cannot be fully utilized because the reduction effect inside the current transmission gear box is generally constant, and the rotation speed cannot be reduced to increase the torque when the weight of the hoisted object increases, and the rotation speed cannot be increased when the weight of the hoisted object decreases.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a constant tension winch transmission gear box with limiting protection, comprising a box body, an input shaft and an output shaft, the input shaft is installed at the rear side of the box body, the output shaft is installed at the front side of the box body, the input shaft and the output shaft are both rotationally connected with the box body, the front end of the input shaft is fixed with a first gear, the right side of the first gear is engaged with a second gear, the middle part of the second gear is fixed with a mounting shaft, and the front side of the mounting shaft is fixed with a third gear, the left side of the third gear is engaged with a fourth gear, the middle part of the fourth gear is fixed with a connecting shaft, the connecting shaft is rotationally connected with the box body, and a transmission mechanism is arranged between the connecting shaft and the output shaft to control the transmission between the output shaft, the connecting shaft and the mounting shaft.

[0007] Further optimization of the technical scheme, the inside of the box body is fixed with a support seat, the support seat is rotationally connected between the front end of the input shaft and the input shaft, and the support seat is rotationally connected with the rear end of the connecting shaft.

[0008] Further optimization of the technical scheme, the outside of the output shaft is provided with a limiting protection mechanism to lock the rotation of the output shaft.

[0009] Further optimization of the technical scheme, the limiting protection mechanism comprises a locking tooth, a locking block and a first extender;

[0010] The locking tooth is fixed on the outside of the output shaft.

[0011] The locking block is arranged outside the locking tooth and is clamped between the locking tooth.

[0012] The first extender is connected with the locking block to control the horizontal movement of the locking block.

[0013] Further optimization of the technical scheme, the transmission mechanism comprises a synchronous gear, a fifth gear, a sixth gear, a support plate, a driving mechanism and a switching mechanism.

[0014] The synchronous gear is arranged on the surface of the connecting shaft and the output shaft, and the two groups of synchronous gears are engaged with each other, and the synchronous gear is nested with the output shaft and the connecting shaft.

[0015] The fifth gear is sleeved on the outside of the connecting shaft, and the fifth gear is located in front of the synchronous gear.

[0016] The sixth gear is sleeved on the outside of the output shaft, and the sixth gear and the fifth gear are in meshing connection;

[0017] The support plate is arranged on the outside of the synchronous gear, the fifth gear and the sixth gear to provide positioning for them;

[0018] The driving mechanism is arranged in the interior of the connecting shaft and the output shaft to control the connection between the connecting shaft and the synchronous gear, the fifth gear, and the connection between the output shaft and the synchronous gear, the sixth gear;

[0019] The switching mechanism is arranged on the front side of the mounting shaft, and the horizontal center line of the mounting shaft and the horizontal center line of the output shaft are arranged to coincide with each other.

[0020] Further optimize the technical solution, the front and back sides of the synchronous gear, the front and back sides of the fifth gear and the front and back sides of the sixth gear are provided with balls, and the balls are attached to the support plate.

[0021] Further optimize the technical solution, the driving mechanism includes a docking block, a first spring, a docking slot, a first trigger block, a second spring, a second trigger block and a third spring;

[0022] The docking block is arranged in the interior of the output shaft and the connecting shaft;

[0023] The first spring is arranged on the outside of the docking block to provide an inward pushing force for the docking block;

[0024] The docking slot is arranged at equal angles in the interior of the synchronous gear, the fifth gear and the sixth gear, and the docking slot and the docking block form a clamping structure;

[0025] The first trigger block is arranged on the inside of the docking block, and the surface of the first trigger block is designed in an inclined structure;

[0026] The second spring is arranged on the outside of the first trigger block to provide a rearward pushing force for the first trigger block;

[0027] The second trigger block is arranged on the front side of the first trigger block, and the second trigger block is attached to the docking block on the inside of the fifth gear and the sixth gear;

[0028] The third spring is arranged on the front side of the second trigger block.

[0029] Further optimize the technical solution, the switching mechanism includes a first transmission block, a transmission head, a transmission slot, a hollow slot, a second transmission block and a control mechanism;

[0030] The first transmission block is arranged on the front end of the mounting shaft, and the first transmission block and the mounting shaft form a front and rear sliding structure;

[0031] Transmission head, fixed on the front end of the first transmission block;

[0032] Transmission groove, opened on the rear end of the output shaft, the transmission groove and the transmission head form a concave-convex matching structure;

[0033] Empty slot, opened on the front end of the transmission groove, the transmission head enters the empty slot and idles, and the rear end of the first trigger block is located inside the empty slot;

[0034] Second transmission block, arranged inside the connecting shaft and forming a front-rear sliding structure with the connecting shaft;

[0035] Control mechanism, arranged outside the first transmission block, synchronously controlling the movement of the first transmission block and the second transmission block.

[0036] Further optimize the technical solution, the control mechanism includes a connecting head, a driving seat, a connecting groove and a second extender;

[0037] Connecting head, fixed on the surface of the first transmission block and the second transmission block;

[0038] Driving seat, sleeved outside the connecting shaft and the output shaft;

[0039] Connecting groove, annularly opened on the rear side of the driving seat, and the connecting groove and the connecting head form a sliding connection;

[0040] Second extender, fixed on the front side of the driving seat to control the movement of the driving seat.

[0041] Further optimize the technical solution, the front end of the connecting head is designed in an enlarged structure, and the connecting heads are arranged in pairs on the surface of the first transmission block and the second transmission block.

[0042] Compared with the prior art, the beneficial effects of the present application are:

[0043] (1) By the cooperation of the first gear and the second gear, one-stage reduction is realized, the third gear and the fourth gear cooperate to realize two-stage reduction, and the fifth gear and the sixth gear cooperate to realize three-stage reduction. According to the use requirement, the transmission effect can be adjusted, so that the power of the output shaft can be adjusted, the transmission effect can be fully utilized, and the functionality of the device is increased.

[0044] (2) The rotation of the output shaft can be locked by the limiting protection mechanism, so that it can be kept stable, avoiding the continuous reaction of the load to the motor and causing damage to the motor, improving the stability of the output shaft, and making the device have a self-locking effect.

[0045] (3) The power on the connecting shaft is synchronously transmitted to the output shaft through the meshing transmission of the synchronous gear, realizing two-stage reduction effect, and the connection between the synchronous gear and the connecting shaft and the output shaft can be cut off, so as to adjust the subsequent transmission effect.

[0046] (4) The power transmission between the mounting shaft and the output shaft is realized through the connection of the transmission head and the transmission groove, and the transmission is automatically released after the transmission head moves forward and is separated from the connection of the transmission groove, so that the transmission effect of the subsequent output shaft can be switched.

[0047] (5) The transmission effect in the connecting shaft and the output shaft is controlled by the movement of the driving seat, and the output power is adjusted, and the driving seat is sleeved on the outside of the connecting shaft and is not affected by the rotation of the connecting shaft. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 It is a schematic diagram of the three-dimensional structure of the application.

[0049] Figure 2 It is a schematic diagram of the top view structure of the application.

[0050] Figure 3 It is a schematic diagram of the internal structure of the box body of the application.

[0051] Figure 4 It is a schematic diagram of the three-dimensional structure of the input shaft of the application.

[0052] Figure 5 It is a schematic diagram of the three-dimensional structure of the output shaft of the application.

[0053] Figure 6 It is a schematic diagram of the three-dimensional structure of the connecting shaft of the application.

[0054] Figure 7 It is a schematic diagram of the three-dimensional structure of the locking tooth of the application.

[0055] Figure 8 It is a schematic diagram of the three-dimensional structure of the driving seat of the application.

[0056] Figure 9 It is a schematic diagram of the side section structure of the output shaft of the application.

[0057] Figure 10 It is a schematic diagram of the Figure 9 enlarged structure at a in the application.

[0058] Figure 11 It is a schematic diagram of the side section structure of the connecting shaft of the application.

[0059] In the figure: 1. housing; 2. input shaft; 3. output shaft; 4. support seat; 5. first gear; 6. second gear; 7. mounting shaft; 8. third gear; 9. fourth gear; 10. connecting shaft; 11. synchronous gear; 12. fifth gear; 13. sixth gear; 14. support plate; 15. locking tooth; 16. locking block; 17. first retractor; 18. first transmission block; 19. transmission head; 20. transmission groove; 21. empty groove; 22. docking block; 23. first spring; 24. docking groove; 25. first trigger block; 26. second spring; 27. second trigger block; 28. third spring; 29. ​​connector; 30. drive seat; 31. connecting groove; 32. second retractor; 33. second transmission block. DETAILED DESCRIPTION

[0060] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0061] Embodiment 1: The present invention provides the following technical solutions: a position-limiting protection type constant tension winch transmission gearbox, such as Figures 1-5 As shown, it includes a housing 1, an input shaft 2 and an output shaft 3. The input shaft 2 is installed on the rear side of the housing 1, and the output shaft 3 is installed on the front side of the housing 1. The input shaft 2 and the output shaft 3 are both rotationally connected to the housing 1. A first gear 5 is fixed to the front end of the input shaft 2, a second gear 6 is engaged with the right side of the first gear 5, and a mounting shaft 7 is fixed to the middle of the second gear 6, and a third gear 8 is fixed to the front side of the mounting shaft 7, a fourth gear 9 is engaged with the left side of the third gear 8, and a connecting shaft 10 is fixed to the middle of the fourth gear 9, a connecting shaft 10 and the housing 1 are rotationally connected, a transmission mechanism is provided between the connecting shaft 10 and the output shaft 3, and the transmission between the output shaft 3, the connecting shaft 10 and the mounting shaft 7 is controlled by the transmission mechanism.

[0062] When in use, the input shaft 2 is connected to the driving source, and the input shaft 2 is controlled to rotate. The input shaft 2 transmits power to the mounting shaft 7 through the engagement of the first gear 5 and the second gear 6, thereby achieving a first-stage deceleration effect. The mounting shaft 7 can transmit power to the connecting shaft 10 through the engagement of the third gear 8 and the fourth gear 9, thereby achieving a second-stage deceleration effect. The connecting shaft 10 transmits power to the output shaft 3 through the engagement between the fifth gear 12 and the sixth gear 13, thereby achieving a third-stage deceleration effect.

[0063] Example 2: Based on Example 1, Figures 6-7As shown, further disclosed is that the inside of the box 1 is fixed with a support seat 4, the support seat 4 is rotatably connected between the front end of the input shaft 2 and the input shaft 2, and the support seat 4 is rotatably connected with the rear end of the connecting shaft 10, the outside of the output shaft 3 is provided with a limiting protection mechanism for locking the rotation of the output shaft 3, the limiting protection mechanism comprises a locking tooth 15, a locking block 16 and a first telescopic device 17, the locking tooth 15 is fixed on the outside of the output shaft 3, the locking block 16 is arranged on the outside of the locking tooth 15 and is clamped with the locking tooth 15, and the first telescopic device 17 is connected with the locking block 16 to control the horizontal movement of the locking block 16.

[0064] The mounting stability of the input shaft 2 and the connecting shaft 10 can be improved through the support seat 4, after the rotation of the output shaft 3 is stopped, the locking block 16 can be moved through the first telescopic device 17 to be connected with the locking tooth 15, the rotation of the output shaft 3 is limited and locked, and the output shaft 3 is kept stable, so that the protection of the output shaft 3 is realized, the accidental rotation of the output shaft 3 is avoided, and the output shaft 3 is kept stable during use.

[0065] Example three: on the basis of example one, as Figures 8-11As shown, further disclosed are a transmission mechanism comprising a synchronous gear 11, a fifth gear 12, a sixth gear 13, a support plate 14, a driving mechanism and a switching mechanism, the synchronous gear 11 is arranged on the surface of the connecting shaft 10 and the output shaft 3, and the two sets of synchronous gears 11 are engaged with each other, the synchronous gear 11 is connected with the output shaft 3 and the connecting shaft 10 in a nested manner, the fifth gear 12 is sleeved on the outer side of the connecting shaft 10, the fifth gear 12 is located on the front side of the synchronous gear 11, the sixth gear 13 is sleeved on the outer side of the output shaft 3, the sixth gear 13 and the fifth gear 12 are connected in a meshing manner, the support plate 14 is arranged on the outer side of the synchronous gear 11, the fifth gear 12 and the sixth gear 13 to provide positioning for them, the driving mechanism is arranged in the interior of the connecting shaft 10 and the output shaft 3 to control the connection between the connecting shaft 10 and the synchronous gear 11, the fifth gear 12 and the output shaft 3 and the synchronous gear 11 and the sixth gear 13, the switching mechanism is arranged on the front side of the mounting shaft 7, and the horizontal center line of the mounting shaft 7 and the horizontal center line of the output shaft 3 are arranged to coincide with each other, the front and back sides of the synchronous gear 11, the front and back sides of the fifth gear 12 and the front and back sides of the sixth gear 13 are all provided with balls, the balls are attached to the support plate 14, the driving mechanism comprises a butt joint block 22, a first spring 23, a butt joint groove 24, a first trigger block 25, a second spring 26, a second trigger block 27 and a third spring 28, the butt joint block 22 is arranged in the interior of the output shaft 3 and the connecting shaft 10, the first spring 23 is arranged on the outer side of the butt joint block 22 to provide an inward thrust for the butt joint block 22, the butt joint groove 24 is arranged at equal angles in the interior of the synchronous gear 11, the fifth gear 12 and the sixth gear 13, and the butt joint groove 24 and the butt joint block 22 form a clamping structure, the first trigger block 25 is arranged on the inner side of the butt joint block 22, and the surface of the first trigger block 25 is designed in an inclined structure, the second spring 26 is arranged on the outer side of the first trigger block 25 to provide a rearward thrust for the first trigger block 25, the second trigger block 27 is arranged on the front side of the first trigger block 25, and the second trigger block 27 is attached to the butt joint block 22 on the inner side of the fifth gear 12 and the sixth gear 13, the third spring 28 is arranged on the front side of the second trigger block 27, the switching mechanism comprises a first transmission block 18, a transmission head 19, a transmission groove 20, an empty groove 21, a second transmission block 33 and a control mechanism, the first transmission block 18 is arranged on the front end of the mounting shaft 7, and the first transmission block 18 and the mounting shaft 7 form a front and back sliding structure, the transmission head 19 is fixed on the front end of the first transmission block 18, the transmission groove 20 is arranged on the rear end of the output shaft 3, the transmission groove 20 and the transmission head 19 form a concave-convex matching structure, the empty groove 21 is arranged on the front end of the transmission groove 20, the transmission head 19 enters the empty groove 21 to idle, the rear end of the first trigger block 25 is locked in the interior of the empty groove 21, the second transmission block 33 is arranged in the interior of the connecting shaft 10 and forms a front and back sliding structure with the connecting shaft 10, and the control mechanism is arranged on the outer side of the first transmission block 18 to control the movement of the first transmission block 18 and the second transmission block 33.The control mechanism comprises a connecting head 29, a driving seat 30, a connecting groove 31 and a second extender 32. The connecting head 29 is fixed on the surface of the first transmission block 18 and the second transmission block 33. The driving seat 30 is sleeved on the outer side of the connecting shaft 10 and the output shaft 3. The connecting groove 31 is annularly arranged on the rear side of the driving seat 30 and is in sliding connection with the connecting head 29. The second extender 32 is fixed on the front side of the driving seat 30 to control the movement of the driving seat 30. The front end of the connecting head 29 is designed in an enlarged structure and the connecting head 29 is arranged in pairs on the surface of the first transmission block 18 and the second transmission block 33.

[0066] When the first-stage speed reduction transmission is performed, the mounting shaft 7 drives the transmission head 19 to rotate through the first transmission block 18. The transmission head 19 drives the output shaft 3 to rotate through the connection with the transmission groove 20 to directly output power. When the second-stage speed reduction transmission is needed, the driving seat 30 is controlled to move forward through the second extender 32 so as to drive the first transmission block 18 and the second transmission block 33 to move through the connecting head 29. The first transmission block 18 drives the transmission head 19 to move forward so that the transmission head 19 is separated from the transmission groove 20 and rotates in the empty groove 21. At this time, the mounting shaft 7 no longer drives the output shaft 3 to rotate. The transmission head 19 is continuously controlled to move forward to push the first trigger block 25 to move. The first trigger block 25 pushes the abutting block 22 to move outward so that the abutting block 22 on the output shaft 3 is connected with the abutting groove 24 in the synchronous gear 11. At the same time, the abutting block 22 on the connecting shaft 10 is also connected with the abutting groove 24 in the synchronous gear 11. The third gear 8 drives the connecting shaft 10 to rotate through the meshing with the fourth gear 9. The connecting shaft 10 transmits power to the output shaft 3 through the synchronous gear 11 to realize the second-stage speed reduction. When the third-stage speed reduction transmission is needed, the first transmission block 18 and the second transmission block 33 are continuously controlled to move forward. The first trigger block 25 releases the extrusion of the abutting block 22 in the synchronous gear 11. The abutting block 22 is separated from the abutting groove 24. Then, the first trigger block 25 pushes the second trigger block 27 to move. The second trigger block 27 pushes the abutting block 22 on the inner side of the fifth gear 12 and the sixth gear 13 to move so as to be connected with the abutting groove 24. At this time, the power on the connecting shaft 10 is transmitted to the output shaft 3 through the meshing of the fifth gear 12 and the sixth gear 13 to realize the third-stage speed reduction effect. The device can adjust the speed reduction effect according to different use needs to increase the functionality of the device.

[0067] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0068] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "set", "install" and the like connecting words should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0069] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A position-limiting protection type constant tension winch transmission gearbox, comprising a box body (1), an input shaft (2) and an output shaft (3), wherein the input shaft (2) is mounted on the rear side of the box body (1), and the output shaft (3) is mounted on the front side of the box body (1); Its characteristics are: The input shaft (2) and the output shaft (3) are both rotatably connected to the housing (1); a first gear (5) is fixed to the front end of the input shaft (2); a second gear (6) is meshed on the right side of the first gear (5); a mounting shaft (7) is fixed to the middle of the second gear (6); a third gear (8) is fixed to the front side of the mounting shaft (7); a fourth gear (9) is meshed on the left side of the third gear (8); a connecting shaft (10) is fixed to the middle of the fourth gear (9); a rotatably connected is formed between the connecting shaft (10) and the housing (1); a transmission mechanism is provided between the connecting shaft (10) and the output shaft (3); and the transmission between the output shaft (3), the connecting shaft (10) and the mounting shaft (7) is controlled by the transmission mechanism; The transmission mechanism includes a switching mechanism, which is arranged on the front side of the mounting shaft (7), and the horizontal center line of the mounting shaft (7) and the horizontal center line of the output shaft (3) are arranged to coincide with each other; The switching mechanism includes a first transmission block (18), a transmission head (19), a transmission slot (20), an empty slot (21), a second transmission block (33) and a control mechanism; A first transmission block (18) is arranged at the front end of the mounting shaft (7), and a front-to-rear sliding structure is formed between the first transmission block (18) and the mounting shaft (7); A transmission head (19) is fixed to the front end of the first transmission block (18); A transmission groove (20) is provided at the rear end of the output shaft (3), and a concave-convex matching structure is formed between the transmission groove (20) and the transmission head (19); An empty slot (21) is provided at the front end of the transmission slot (20), the transmission head (19) enters the empty slot (21) and idles, and the rear end of the locking first trigger block (25) is located inside the empty slot (21); A second transmission block (33) is arranged inside the connecting shaft (10) and between the connecting shaft (10) to form a forward and backward sliding structure; A control mechanism is provided outside the first transmission block (18) and synchronously controls the movement of the first transmission block (18) and the second transmission block (33); The control mechanism comprises a connecting head (29), a driving seat (30), a connecting groove (31) and a second telescopic device (32); A connector (29) is fixed to the surfaces of the first transmission block (18) and the second transmission block (33); A drive seat (30) is sleeved on the outside of the connecting shaft (10) and the output shaft (3); A connecting groove (31) is formed in an annular shape and is provided on the rear side of the driving seat (30), and a sliding connection is formed between the connecting groove (31) and the connecting head (29); The second telescopic device (32) is fixed to the front side of the driving seat (30) to control the movement of the driving seat (30).

2. A position-limiting protection type constant tension winch transmission gearbox according to claim 1, characterized in that: A support seat (4) is fixed inside the box (1), and the support seat (4) is arranged between the front end of the input shaft (2) and the input shaft (2) to form a rotational connection, and the support seat (4) and the rear end of the connecting shaft (10) form a rotational connection.

3. The position-limiting protection type constant tension winch transmission gearbox according to claim 1, characterized in that: A limit protection mechanism is provided on the outer side of the output shaft (3) to lock the rotation of the output shaft (3).

4. The position-limiting protection type constant tension winch transmission gearbox according to claim 3, characterized in that: The position limiting protection mechanism comprises a locking tooth (15), a locking block (16) and a first retractor (17); A locking tooth (15) fixed to the outside of the output shaft (3); A locking block (16) is arranged on the outer side of the locking tooth (15) and between the locking tooth (15) to form a locking structure; The first telescoping device (17) is connected to the locking block (16) to control the horizontal movement of the locking block (16).

5. The position-limiting protection type constant tension winch transmission gearbox according to claim 1, characterized in that: The transmission mechanism comprises a synchronous gear (11), a fifth gear (12), a sixth gear (13), a support plate (14), and a driving mechanism; Synchronous gears (11) are arranged on the surfaces of the connecting shaft (10) and the output shaft (3), and the two sets of synchronous gears (11) are meshed with each other, and the synchronous gears (11) and the output shaft (3) and the connecting shaft (10) are all nested and connected; A fifth gear (12) is sleeved on the outer side of the connecting shaft (10), and the fifth gear (12) is located in front of the synchronous gear (11); A sixth gear (13) is sleeved on the outer side of the output shaft (3), and the sixth gear (13) and the fifth gear (12) are meshedly connected; A support plate (14) is arranged on the outside of the synchronous gear (11), the fifth gear (12) and the sixth gear (13) to provide positioning for them; The drive mechanism is arranged inside the connecting shaft (10) and the output shaft (3) and controls the connection between the connecting shaft (10) and the synchronous gear (11), the fifth gear (12) and the output shaft (3) and the synchronous gear (11), the sixth gear (13).

6. The position-limiting protection type constant tension winch transmission gearbox according to claim 5, characterized in that: Balls are provided on the front and rear sides of the synchronous gear (11), the front and rear sides of the fifth gear (12), and the front and rear sides of the sixth gear (13), and the balls are fitted to the support plate (14).

7. The position-limiting protection type constant tension winch transmission gearbox according to claim 5, characterized in that: The driving mechanism comprises a docking block (22), a first spring (23), a docking groove (24), a first trigger block (25), a second spring (26), a second trigger block (27) and a third spring (28); A docking block (22) is provided inside the output shaft (3) and the connecting shaft (10); A first spring (23) is arranged on the outside of the docking block (22) to provide an inward thrust for the docking block (22); The docking groove (24) is provided at equal angles inside the synchronous gear (11), the fifth gear (12) and the sixth gear (13), and a locking structure is formed between the docking groove (24) and the docking block (22); A first trigger block (25) is arranged on the inner side of the docking block (22), and the surface of the first trigger block (25) is designed to be inclined; a second spring (26), arranged on the outside of the first trigger block (25) to provide a backward thrust for the first trigger block (25); The second trigger block (27) is arranged on the front side of the first trigger block (25), and the second trigger block (27) is in contact with the fifth gear (12) and the docking block (22) on the inner side of the sixth gear (13); The third spring (28) is arranged on the front side of the second trigger block (27).

8. The position-limiting protection type constant tension winch transmission gearbox according to claim 7, characterized in that: The front end of the connector (29) is designed to be an enlarged structure, and the connector (29) is arranged in pairs on the surfaces of the first transmission block (18) and the second transmission block (33).

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