A cargo winch structure

Abstract

The present invention belongs to the technical field of winches, and discloses a freight winch structure, including a casing, a driving device is fixedly installed at the rear end of the casing, a double gear one is movably connected to the front end of the right end of the casing, a traction assembly is fixedly installed at the left end of the double gear one, and a double-threaded ball screw is movably connected to the bottom of the front end of the casing. The present invention drives the double-threaded ball screw to rotate through a forward gear, drives the selection gear to move rightward through a cylinder, separates the selection gear from the forward gear and meshes with the double gear two, thereby realizing the double-threaded ball screw to rotate in reverse periodically, and realizing that the double-threaded ball screw can drive two meshing blocks to perform periodic reciprocating motion left and right, so that the traction rope can be evenly arranged on the surface of the hoisting pipe, ensuring that the winding positions and line arrangement directions of the two groups of traction ropes are exactly the same, thereby ensuring the stability of the traction and dragging of the device.

Description

Technical Field

[0001] The invention belongs to the technical field of winches, and in particular relates to a freight winch structure. Background Art

[0002] The electric traction winch is mainly used to pull cargo such as containers, vehicles and large equipment into the helicopter cargo hold. When the aircraft cannot provide effective power or its own electrical components fail, it can switch to manual mode to perform the cargo traction function. It is mainly composed of an external motor driver, controller, sensor and cables.

[0003] When the existing winches are in use, most of them drive the traction rope to be released from the winch drum and reeled on the winch drum through the rotation of the winch drum, so as to achieve the release of the line and towing the cargo. However, when towing the cargo, most of them connect the traction ropes at both ends of the cargo to ensure the stability of the cargo when towing. However, when the two sets of traction ropes are reeled in, the winding position and the line arrangement direction of the two sets of traction ropes on the reel may deviate, resulting in that when towing the cargo, one end of the cargo may move a certain distance instantly, which may cause the towed cargo to interfere with the side wall of the cabin, resulting in damage to the cargo and the cabin, and reducing the stability of traction and towing.

[0004] When existing winches reel in and release the traction rope, most of them directly drive the winch drum to rotate to achieve reeling and releasing. However, when the device suddenly loses power, although a manual device can be used to continue to complete reeling and releasing, at the moment of sudden power failure, the cargo may slide backward due to loss of traction power, and may hit walking personnel when sliding out of the cabin, causing injuries, thereby reducing the safety of the device.

[0005] When the existing winch reels in and releases the traction rope, although the reeling speed of the traction rope can be controlled by a driving device, the traction rope may still be loosely wound around the hoisting drum during reeling, causing the traction rope to become loose. When releasing the traction rope, the slack portion of the traction rope may instantly slide out of one end, causing the two sets of traction ropes to extend to different lengths, making it impossible to smoothly tow the cargo, thereby reducing the scope of use of the device. Summary of the invention

[0006] The object of the present invention is to provide a freight winch structure to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a freight winch structure, including a casing, a driving device is fixedly installed at the rear end of the casing, and a double gear 1 is movably connected to the front end of the right end of the casing, the casing is fixedly installed on the inner wall of the cabin, and the spacing between the self-locking hook and the bottom surface of the cabin is ensured to be 100 mm, and then the driving device is connected to the power supply in the cabin, so that the driving device drives the winch pipe to rotate through the double gear 1, and the left end of the double gear 1 is fixedly installed with a traction assembly, and the bottom surface of the front end of the casing is fixedly installed with a double gear 1. The casing is movably connected with a double-thread ball screw, and a forward gear is fixedly installed on the right end of the double-thread ball screw. A selection gear is provided on the right side of the casing, and a moving mechanism is fixedly installed on the right side of the casing. The right side of the casing is movably connected with a reversing mechanism, and an engaging block is meshed on the surface of the double-thread ball screw, and a locking block is provided above the engaging block. When the engaging block moves, the traction rope can be driven to reciprocate on the front side of the winch pipe through the locking block and the positioning bar, so that the traction rope can be evenly arranged on the surface of the winch pipe.

[0008] Preferably, a connecting cavity is opened at the four corners of the engaging block, a positioning strip is fixedly installed on the top surface of the engaging block, a magnetic positioning shaft is fixedly installed at the four corners of the bottom surface of the locking block, the magnetic positioning shaft is movably connected in the inner cavity of the connecting cavity, a locking spring is fixedly installed on the top surface of the bottom end of the magnetic positioning shaft, an electromagnet is fixedly installed on the bottom end of the inner cavity of the connecting cavity, and a conductive rod is fixedly installed on the front side of the bottom end of the inner cavity of the casing, so that the electromagnet is energized to generate magnetism, and the magnetic positioning shaft is pushed upward under the action of the repulsive force between the bottom end of the magnetic positioning shaft and the electromagnet, so that the locking block unlocks the traction rope.

[0009] Preferably, a fixing plate is fixedly installed on the left end of the inner cavity of the casing, positioning sleeves are fixedly installed on the left and right sides of the front side of the fixing plate, a magnetic plate is fixedly installed on the left side of the inner cavity of the positioning sleeve, the inner cavity of the positioning sleeve is movably connected with a magnetic clamping shaft, and a pressure plate is fixedly installed on the rear end of the magnetic clamping shaft. The pressure plate is always in contact with the traction rope, so as to achieve a compression effect on the traction rope when the traction rope is wound up to prevent the traction rope from loosening.

[0010] Preferably, the traction assembly includes a hoisting tube, which is fixedly installed in the middle part of the double gear one, and a traction rope is wound around the surface of the hoisting tube. A self-locking hook is fixedly installed at the front end of the traction rope. There are two hoisting tubes in total, and the two hoisting tubes are respectively located on the left and right sides of the front end of the inner cavity of the casing. When the traction rope is released, the self-locking hook is buckled on the pallet at the bottom of the cargo, and the hoisting tube is driven to rotate through the double gear one, so that the traction rope is wound around the surface of the hoisting tube, thereby dragging the cargo into the cabin.

[0011] Preferably, the moving mechanism includes a cylinder, a connecting pipe is fixedly installed at the front end of the cylinder, and a connecting shaft is movably connected to the left end of the connecting pipe, and the connecting shaft is movably connected to the middle part of the selection gear. When the two engaging blocks move to the middle part of the double-threaded ball screw, the cylinder draws the liquid in the connecting pipe into the cylinder, and under the action of pressure, the connecting shaft can drive the selection gear to move to the right, so that the selection gear is separated from the forward gear and meshes with the double gear two.

[0012] Preferably, the reversing mechanism includes a transmission wheel 1 and a double gear 2, the transmission wheel 1 is fixedly mounted on the right end of the double-threaded ball screw, the double gear 2 is movably connected to the right side of the casing, the rear end of the double gear 2 is meshed with a driven gear, the right end of the driven gear is fixedly mounted with a transmission wheel 2, the surfaces of the transmission wheel 1 and the transmission wheel 2 are transmission-connected by a transmission belt, the driven gear is movably connected to the right side of the casing, and the driven gear and the transmission wheel 2 can be driven to rotate through the meshing of the double gear 2 and the driven gear, and the transmission wheel 2 and the transmission wheel 1 are connected through the transmission belt transmission, thereby driving the double-threaded ball screw to rotate in the opposite direction, thereby making the two meshing blocks move relative to each other, and realizing that the double-threaded ball screw can drive the two meshing blocks to perform left and right periodic reciprocating motion.

[0013] Preferably, the locking spring is movably sleeved on the surface of the magnetic positioning shaft, the top end of the locking spring is fixedly mounted on the top surface of the inner cavity of the connecting cavity, the bottom end of the electromagnet is electrically connected to the conductive rod, and the electromagnet loses its power source. At this time, the electromagnet is powered off and loses its magnetism. The locking spring in a compressed state will drive the magnetic positioning shaft to move downward, thereby pulling the locking block downward, so that the locking block and the positioning bar instantly compress and lock the traction rope between the locking block and the positioning bar, thereby preventing the cargo from moving backward out of the cabin.

[0014] Preferably, the pressure plate is located on the rear side of the fixed plate, and the cross-sectional shape of the pressure plate is arc-shaped. The right side surface of the pressure plate is in contact with the left end of the traction rope. The traction rope passes through the space formed between the positioning strip and the locking block, and then winds upward from the rear end of the hoisting tube. During the winding, the magnetism between the magnetic plate and the front end of the magnetic clamping shaft will drive the magnetic clamping shaft and the pressure plate to move toward the hoisting tube.

[0015] Preferably, a manual mechanism is fixedly installed on the top of the rear end of the inner cavity of the casing, and a worm gear is provided inside the manual mechanism to drive the planetary reducer ring gear, which is connected to the driving device. A "Z"-shaped rocker is inserted into the manual mechanism, and then the conductive rod is energized with a backup power supply. At this time, rotating the "Z"-shaped rocker can drive the worm gear inside the manual mechanism to drive the planetary reducer ring gear to rotate, thereby driving the double gear to rotate, thereby realizing manual dragging and traction after power failure.

[0016] Preferably, the rear end of the forward gear is meshed with the front end of the selection gear, and the distance between the forward gear and the transmission wheel one is greater than the thickness of the selection gear. Through the meshing of the left end of the duplex gear one with the selection gear and the meshing of the selection gear with the forward gear, the double-threaded ball screw can be driven to rotate through the forward gear, thereby achieving the goal that the double-threaded ball screw drives the two meshing blocks meshed on the surface of the double-threaded ball screw to move toward each other when rotating, and at the same time ensures that the selection gear will not mesh with the forward gear and the duplex gear two at the same time when moving to the right, thereby avoiding damage to the device.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The present invention can drive the double-threaded ball screw to rotate through the forward gear by selecting the gear to mesh with the double gear one and the forward gear respectively, and drive the selection gear to move rightward through the cylinder, so that the selection gear is separated from the forward gear and meshed with the double gear two, thereby realizing the periodic reverse rotation of the double-threaded ball screw, and realizing that the double-threaded ball screw can drive the two meshing blocks to perform periodic reciprocating motion left and right, so that the traction rope can be evenly arranged on the surface of the hoisting pipe, ensuring that the winding positions and line arrangement directions of the two groups of traction ropes are exactly the same, thereby ensuring the traction and dragging stability of the device;

[0019] 2. The present invention uses the positioning strip and the locking block to position the traction rope when the traction rope is rolled up. When the electromagnet is powered off and loses its magnetism, the locking spring in a compressed state drives the magnetic positioning shaft to move downward, thereby pulling the locking block downward, so that the locking block and the positioning strip instantly compress and lock the traction rope between the locking block and the positioning strip, thereby preventing the cargo from moving backward out of the cabin, thereby preventing personal injury and improving the safety of the device;

[0020] 3. In the present invention, the traction rope passes through the space formed between the positioning strip and the locking block, and then is wound upward from the rear end of the hoisting tube. During the winding, the magnetism between the magnetic plate and the front end of the magnetic clamping shaft drives the magnetic clamping shaft and the pressure plate to move toward the hoisting tube, so that the pressure plate presses the traction rope, thereby avoiding slack at the position where the traction rope is rolled up and stacked, and can ensure that the extended lengths of the two sets of traction ropes during traction are completely equal, thereby improving the use range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 This is a schematic diagram of the explosion connection of the fixing plate of the present invention;

[0023] Figure 3 This is a schematic diagram of the transmission connection of the double-threaded ball screw of the present invention;

[0024] Figure 4This is a schematic diagram of the explosive connection of the conductive rod of the present invention;

[0025] Figure 5 This is a schematic diagram of the explosion connection of the locking block of the present invention;

[0026] Figure 6 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0027] Figure 7 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0028] Figure 8 For the present invention Figure 5 Enlarged schematic diagram at point C in the middle.

[0029] In the figure: 1. casing; 2. driving device; 3. double gear one; 4. traction assembly; 401. hoisting pipe; 402. traction rope; 403. self-locking hook; 5. double-threaded ball screw; 6. selection gear; 7. forward gear; 8. moving mechanism; 801. cylinder; 802. connecting pipe; 803. connecting shaft; 9. reversing mechanism; 901. transmission wheel one; 902. double gear two; 903. driven gear; 904. transmission wheel two; 905. transmission belt; 10. meshing block; 11. locking block; 12. positioning strip; 13. connecting cavity; 14. magnetic positioning shaft; 15. locking spring; 16. electromagnet; 17. conductive rod; 18. fixing plate; 19. positioning sleeve; 20. magnetic plate; 21. magnetic clamping shaft; 22. pressure plate; 23. manual mechanism. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0031] like Figures 1 to 8As shown, in an embodiment of the present invention, a freight winch structure includes a casing 1, a driving device 2 is fixedly installed at the rear end of the casing 1, and a double gear 3 is movably connected to the front end of the right end of the casing 1. The casing 1 is fixedly installed on the inner wall of the cabin, and the spacing between the self-locking hook 403 and the bottom surface of the cabin is ensured to be 100 mm. Then the driving device 2 is connected to the power supply in the cabin, so that the driving device 2 drives the hoisting pipe 401 to rotate through the double gear 3, and the left end of the double gear 3 is fixedly installed with a traction component 4. The bottom of the front end of the casing 1 is movably connected with a double-threaded ball Screw 5, a forward gear 7 is fixedly installed on the right end of the double-thread ball screw 5, a selection gear 6 is provided on the right side of the casing 1, a moving mechanism 8 is fixedly installed on the right side of the casing 1, and a reversing mechanism 9 is movably connected to the right side of the casing 1. An engaging block 10 is meshed on the surface of the double-thread ball screw 5, and a locking block 11 is provided above the engaging block 10. When the engaging block 10 moves, the traction rope 402 can be driven to reciprocate on the front side of the winch tube 401 through the locking block 11 and the positioning bar 12, so that the traction rope 402 can be evenly arranged on the surface of the winch tube 401.

[0032] Among them, a connecting cavity 13 is opened at the four corners of the engaging block 10, a positioning bar 12 is fixedly installed on the top surface of the engaging block 10, and a magnetic positioning shaft 14 is fixedly installed at the four corners of the bottom surface of the locking block 11. The magnetic positioning shaft 14 is movably connected in the inner cavity of the connecting cavity 13, and a locking spring 15 is fixedly installed on the top surface of the bottom end of the magnetic positioning shaft 14. An electromagnet 16 is fixedly installed at the bottom end of the inner cavity of the connecting cavity 13, and a conductive rod 17 is fixedly installed on the front side of the bottom end of the inner cavity of the casing 1, so that the electromagnet 16 is energized to generate magnetism, and the magnetic positioning shaft 14 is pushed upward under the action of the repulsive force between the bottom end of the magnetic positioning shaft 14 and the electromagnet 16, so that the locking block 11 unlocks the traction rope 402.

[0033] Among them, a fixing plate 18 is fixedly installed on the left end of the inner cavity of the casing 1, and a positioning sleeve 19 is fixedly installed on the left and right sides of the front side of the fixing plate 18, and a magnetic plate 20 is fixedly installed on the left side of the inner cavity of the positioning sleeve 19. The inner cavity of the positioning sleeve 19 is movably connected with a magnetic clamping shaft 21, and a pressure plate 22 is fixedly installed at the rear end of the magnetic clamping shaft 21. The pressure plate 22 is always in contact with the traction rope 402, so as to achieve a compression effect on the traction rope 402 when the traction rope 402 is wound, thereby preventing the traction rope 402 from loosening.

[0034] Among them, the traction component 4 includes a hoisting tube 401, which is fixedly installed in the middle of the double gear 3. A traction rope 402 is wound around the surface of the hoisting tube 401, and a self-locking hook 403 is fixedly installed at the front end of the traction rope 402. There are two hoisting tubes 401, which are respectively located on the left and right sides of the front end of the inner cavity of the casing 1. When the traction rope 402 is released, the self-locking hook 403 is buckled on the pallet at the bottom of the cargo, and the hoisting tube 401 is driven to rotate through the double gear 3, so that the traction rope 402 is rolled up on the surface of the hoisting tube 401, thereby dragging the cargo into the cabin.

[0035] Among them, the moving mechanism 8 includes a cylinder 801, a connecting pipe 802 is fixedly installed at the front end of the cylinder 801, and a connecting shaft 803 is movably connected to the left end of the connecting pipe 802. The connecting shaft 803 is movably connected to the middle part of the selection gear 6. When the two engaging blocks 10 move to the middle part of the double-threaded ball screw 5, the cylinder 801 draws the liquid in the connecting pipe 802 into the cylinder 801. Under the action of pressure, the connecting shaft 803 can be driven to drive the selection gear 6 to move to the right, so that the selection gear 6 is separated from the forward gear 7 and meshes with the double gear 2 902.

[0036] Among them, the reversing mechanism 9 includes a transmission wheel 1 901 and a double gear 2 902, the transmission wheel 1 901 is fixedly installed on the right end of the double-threaded ball screw 5, the double gear 2 902 is movably connected to the right side of the casing 1, the rear end of the double gear 2 902 is meshed with a driven gear 903, and the right end of the driven gear 903 is fixedly installed with a transmission wheel 2 904, the surfaces of the transmission wheel 1 901 and the transmission wheel 2 904 are transmission-connected with a transmission belt 905, and the driven gear 903 is movably connected to the right side of the casing 1, and the driven gear 903 and the transmission wheel 2 904 can be driven to rotate through the meshing of the double gear 2 902 and the driven gear 903, and the transmission wheel 2 904 and the transmission wheel 1 901 are connected through the transmission belt 905, so that the double-threaded ball screw 5 can be driven to rotate in the opposite direction, so that the two meshing blocks 10 move relative to each other, so that the double-threaded ball screw 5 can drive the two meshing blocks 10 to perform left and right periodic reciprocating motion.

[0037] Among them, the locking spring 15 is movably sleeved on the surface of the magnetic positioning shaft 14, and the top end of the locking spring 15 is fixedly installed on the top surface of the inner cavity of the connecting cavity 13. The bottom end of the electromagnet 16 is electrically connected to the conductive rod 17. The electromagnet 16 loses its power source. At this time, the electromagnet 16 is powered off and loses its magnetism. The locking spring 15 in a compressed state will drive the magnetic positioning shaft 14 to move downward, thereby pulling the locking block 11 downward, so that the locking block 11 and the positioning bar 12 instantly compress and lock the traction rope 402 between the locking block 11 and the positioning bar 12, thereby preventing the cargo from moving backward out of the cabin.

[0038] Among them, the pressing plate 22 is located on the rear side of the fixed plate 18, and the cross-sectional shape of the pressing plate 22 is arc-shaped. The right side surface of the pressing plate 22 is in contact with the left end of the traction rope 402. The traction rope 402 passes through the space formed between the positioning bar 12 and the locking block 11, and then winds upward from the rear end of the hoisting tube 401. During the winding, the magnetism between the magnetic plate 20 and the front end of the magnetic clamping shaft 21 will drive the magnetic clamping shaft 21 and the pressing plate 22 to move toward the hoisting tube 401.

[0039] Among them, a manual mechanism 23 is fixedly installed on the top of the rear end of the inner cavity of the casing 1. A worm gear is provided inside the manual mechanism 23 to drive the planetary reducer ring gear, which is connected to the drive device 2. A "Z"-shaped rocker is inserted into the manual mechanism 23, and then the conductive rod 17 is energized using a backup power supply. At this time, rotating the "Z"-shaped rocker can drive the worm gear inside the manual mechanism 23 to drive the planetary reducer ring gear to rotate, thereby driving the double gear 3 to rotate, thereby realizing manual dragging and traction after power failure.

[0040] Among them, the rear end of the forward gear 7 is meshed with the front end of the selection gear 6, and the distance between the forward gear 7 and the transmission wheel 1 901 is greater than the thickness of the selection gear 6. Through the meshing of the left end of the duplex gear 1 3 with the selection gear 6, and the meshing of the selection gear 6 with the forward gear 7, the double-threaded ball screw 5 can be driven to rotate through the forward gear 7, so that the double-threaded ball screw 5 drives the two meshing blocks 10 meshing on the surface of the double-threaded ball screw 5 to move toward each other when rotating, and at the same time ensures that the selection gear 6 will not mesh with the forward gear 7 and the duplex gear 2 902 at the same time when moving to the right, so as to avoid damage to the device.

[0041] Working principle and usage process:

[0042] When in use, the casing 1 is fixedly mounted on the inner wall of the cabin, and the spacing between the self-locking hook 403 and the bottom surface of the cabin is ensured to be one hundred millimeters. Then the driving device 2 is connected to the power supply in the cabin, so that the driving device 2 drives the hoisting tube 401 to rotate through the double gear 1-3. The rotation of the servo motor arranged in the driving device 2 drives the sun gear of the first-stage planetary reducer to rotate. The retaining frame of the first-stage planetary reducer is fixed, and the ring gear outputs. The retaining frame is connected to the worm gear of the worm gear pair and remains fixed under the self-locking constraint of the worm gear pair. The ring gear outputs the rotation speed to the second-stage 3K planetary reducer on the right side. The output rotation speed of the ring gear directly drives the hoisting tube 401 to output torque, and drives the traction rope 402 to collect or release the rope;

[0043] After the traction rope 402 is released, the self-locking hook 403 is buckled on the pallet at the bottom of the cargo, and the double gear 13 drives the hoisting tube 401 to rotate, so that the traction rope 402 is rolled up on the surface of the hoisting tube 401, thereby dragging the cargo into the cabin;

[0044] When dragging and traction is performed, the traction rope 402 passes through the space formed between the positioning bar 12 and the locking block 11, and then winds upward from the rear end of the hoisting tube 401. During the winding, the magnetism between the magnetic plate 20 and the front end of the magnetic clamping shaft 21 drives the magnetic clamping shaft 21 and the pressing plate 22 to move toward the hoisting tube 401, so that the pressing plate 22 presses the traction rope 402, thereby preventing the traction rope 402 from being loosened at the position where it is rolled up and stacked;

[0045] And when unwinding and reeling, through the meshing of the left end of the double gear 3 with the selection gear 6, and the meshing of the selection gear 6 with the forward gear 7, the forward gear 7 can drive the double-threaded ball screw 5 to rotate, so that the double-threaded ball screw 5 drives the two meshing blocks 10 meshing on the surface of the double-threaded ball screw 5 to move toward each other when rotating. When the two meshing blocks 10 move to the middle of the double-threaded ball screw 5, the cylinder 801 draws the liquid in the connecting pipe 802 into the cylinder 801, and under the action of pressure, the connecting shaft 80 3 drives the selection gear 6 to move rightward, so that the selection gear 6 is separated from the forward gear 7 and meshes with the double gear 2 902. Through the meshing of the double gear 2 902 and the driven gear 903, the driven gear 903 and the transmission wheel 2 904 can be driven to rotate. The transmission wheel 2 904 and the transmission wheel 1 901 are connected through the transmission belt 905, so that the double-threaded ball screw 5 can be driven to rotate in the opposite direction, so that the two meshing blocks 10 move relative to each other, and the double-threaded ball screw 5 can drive the two meshing blocks 10 to perform a periodic reciprocating motion left and right;

[0046] When the engagement block 10 moves, the locking block 11 and the positioning bar 12 can drive the traction rope 402 to reciprocate on the front side of the hoisting tube 401, so that the traction rope 402 can be evenly arranged on the surface of the hoisting tube 401;

[0047] When the device is accidentally powered off, the electromagnet 16 loses its power source. At this time, the electromagnet 16 loses power and loses its magnetism. The locking spring 15 in a compressed state drives the magnetic positioning shaft 14 to move downward, thereby pulling the locking block 11 downward, so that the locking block 11 and the positioning bar 12 instantly compress and lock the traction rope 402 between the locking block 11 and the positioning bar 12, thereby preventing the cargo from moving backward out of the cabin;

[0048] When continuing to drag and traction, use a "Z"-shaped rocker to insert into the manual mechanism 23, and then use the backup power supply to energize the conductive rod 17, so that the electromagnet 16 is energized to generate magnetism, and the magnetic positioning shaft 14 is pushed upward under the action of the repulsive force between the bottom end of the magnetic positioning shaft 14 and the electromagnet 16, so that the locking block 11 unlocks the traction rope 402. At this time, rotating the "Z"-shaped rocker can drive the worm gear inside the manual mechanism 23 to drive the planetary reducer ring gear to rotate, thereby driving the double gear 3 to rotate, and realizing manual dragging and traction after power failure.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A freight winch structure, comprising a housing (1), characterized in that: A driving device (2) is fixedly mounted on the rear end of the casing (1); a double gear (3) is movably connected to the front end of the right end of the casing (1); a traction assembly (4) is fixedly mounted on the left end of the double gear (3); a double-threaded ball screw (5) is movably connected to the bottom of the front end of the casing (1); a forward gear (7) is fixedly mounted on the right end of the double-threaded ball screw (5); a selection gear (6) is provided on the right side of the casing (1); a moving mechanism (8) is fixedly mounted on the right side of the casing (1); a reversing mechanism (9) is movably connected to the right side of the casing (1); a meshing block (10) is meshed on the surface of the double-threaded ball screw (5); a locking block (11) is provided above the meshing block (10); The four corners of the meshing block (10) are provided with a connecting cavity (13), the top surface of the meshing block (10) is fixedly mounted with a positioning strip (12), the four corners of the bottom surface of the locking block (11) are fixedly mounted with a magnetic positioning shaft (14), the magnetic positioning shaft (14) is movably connected in the inner cavity of the connecting cavity (13), the top surface of the bottom end of the magnetic positioning shaft (14) is fixedly mounted with a locking spring (15), the bottom end of the inner cavity of the connecting cavity (13) is fixedly mounted with an electromagnet (16), and the front side of the bottom end of the inner cavity of the housing (1) is fixedly mounted with a conductive rod (17); A fixing plate (18) is fixedly mounted on the left end of the inner cavity of the casing (1), positioning sleeves (19) are fixedly mounted on both left and right sides of the front side of the fixing plate (18), a magnetic plate (20) is fixedly mounted on the left side of the inner cavity of the positioning sleeve (19), the inner cavity of the positioning sleeve (19) is movably connected to a magnetic clamping shaft (21), and a pressure plate (22) is fixedly mounted on the rear end of the magnetic clamping shaft (21).

2. A freight winch structure according to claim 1, characterized in that: The traction assembly (4) comprises a hoisting tube (401), the hoisting tube (401) being fixedly mounted in the middle of the double gear one (3), a traction rope (402) being wound around the surface of the hoisting tube (401), a self-locking hook (403) being fixedly mounted at the front end of the traction rope (402), and there are two hoisting tubes (401) in total, the two hoisting tubes (401) being respectively located on the left and right sides of the front end of the inner cavity of the casing (1).

3. A freight winch structure according to claim 1, characterized in that: The moving mechanism (8) comprises a cylinder (801), a connecting pipe (802) is fixedly mounted on the front end of the cylinder (801), a connecting shaft (803) is movably connected to the left end of the connecting pipe (802), and the connecting shaft (803) is movably connected to the middle part of the selection gear (6).

4. A freight winch structure according to claim 1, characterized in that: The reversing mechanism (9) comprises a transmission wheel 1 (901) and a double gear 2 (902); the transmission wheel 1 (901) is fixedly mounted on the right end of the double-threaded ball screw (5); the double gear 2 (902) is movably connected to the right side of the housing (1); a driven gear (903) is meshed at the rear end of the double gear 2 (902); a transmission wheel 2 (904) is fixedly mounted on the right end of the driven gear (903); a transmission belt (905) is connected to the surfaces of the transmission wheel 1 (901) and the transmission wheel 2 (904); and the driven gear (903) is movably connected to the right side of the housing (1).

5. A freight winch structure according to claim 1, characterized in that: The locking spring (15) is movably sleeved on the surface of the magnetic positioning shaft (14), the top end of the locking spring (15) is fixedly mounted on the top surface of the inner cavity of the connecting cavity (13), and the bottom end of the electromagnet (16) is electrically connected to the conductive rod (17).

6. A freight winch structure according to claim 2, characterized in that: The pressing plate (22) is located at the rear side of the fixing plate (18); the cross-section of the pressing plate (22) is arc-shaped; the right side surface of the pressing plate (22) is in contact with the left end of the traction rope (402).

7. A freight winch structure according to claim 1, characterized in that: A manual mechanism (23) is fixedly mounted on the top of the rear end of the inner cavity of the casing (1), and a worm gear-driven planetary reducer ring gear is provided inside the manual mechanism (23) and is transmission-connected to the driving device (2).

8. A freight winch structure according to claim 4, characterized in that: The rear end of the forward gear (7) meshes with the front end of the selection gear (6), and the distance between the forward gear (7) and the transmission wheel 1 (901) is greater than the thickness of the selection gear (6).

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