An onshore power cable winch

Abstract

The present invention discloses a shore power cable winch. The shore power cable winch includes a mounting frame, a winding assembly, an electrical box, a driving structure, and a limiting structure. The mounting frame includes a first mounting plate and a second mounting plate that are spaced apart in the left-right direction. The winding assembly includes a rotating shaft and a winding drum. The rotating shaft is arranged in the left-right direction between the first mounting plate and the second mounting plate, and the winding drum is sleeved on the outer periphery of the rotating shaft. The electrical box is mounted on the second mounting plate and is used for electrically connecting with the cable wound around the outer periphery of the winding drum. The driving structure is mounted on the first mounting plate and is used for driving the winding drum to wind up the cable. The present invention aims to solve the problems that it is not easy to control the unwinding speed of the cable winch during the unwinding process. If the unwinding speed is too fast, it is easy to cause the cable wound around the winding drum to become loose and knotted, and it is not easy to control the length of the cable unwound.

Description

Technical Field

[0001] The present invention relates to the technical field of ship shore power supply, and particularly relates to a shore power cable winch. Background Art

[0002] Briefly speaking, a ship shore power system means that when a ship is docked at a wharf, the ship's self-provided auxiliary generator is stopped, and instead, the land power is used to supply power to the main on-board systems. During the operation of the ship docking at the port, in order to maintain production and living needs, it is necessary to start the auxiliary generator on the ship to generate electricity to provide the necessary power.

[0003] For energy conservation and environmental protection considerations, ships berthed at the port are required to turn off all on-board generators on the ship and instead supply power to the ship through the power source on the shore side of the port. When connecting the shore power system, a ship shore power cable retracting and deploying device is usually required as a professional cable retracting and deploying device. Affected by wind and waves and the ebb and flow of the tide, the hull and the shore power cable are displaced. The ship shore power cable is a cable used by the ship's shore power box to connect to the shore or other ship power sources. During the daily construction of the ship and when leaving and approaching the dock during navigation, connecting the ship shore power cable is a necessary task.

[0004] In the prior art, when a ship connects to shore power, whether it is during the cable retracting or deploying process, the cable is subjected to an external pulling force. In this case, once the cable winch loses the operating force of a person, it will passively deploy the cable under the action of the external cable pulling force, and this situation is extremely dangerous, and there will be situations where the cable on the empty reel of the cable winch is pulled off or mechanical strikes injure people. After the ship connects to shore power, the distance between the ship and the shore-based device will change with the tide, getting closer and farther. At this time, it is necessary to control the winch to retract and deploy the cable to maintain the risk of the cable being straightened or broken or the cable being too loose and winding around foreign objects. When the ship is using shore power and both ends are fixed, randomly retracting and deploying the cable will cause the cable to be twisted. Excessive winding will cause the cable to be broken, leading to serious accidents. Summary of the Invention

[0005] The main object of the present invention is to propose a shore power cable winch, aiming to solve the problems that it is not easy to control the pay-out speed during the pay-out process of the cable winch. If the pay-out speed is too fast, the cable wound around the winding drum is likely to become loose and knotted, and it is not easy to control the length of the cable paid out.

[0006] To achieve the above object, a shore power cable winch proposed by the present invention includes:

[0007] A mounting frame, including a first mounting plate and a second mounting plate arranged at intervals in the left-right direction;

[0008] A winding assembly, including a rotating shaft and a winding drum, the rotating shaft is arranged between the first mounting plate and the second mounting plate in the left-right direction, and the winding drum is sleeved on the outer periphery of the rotating shaft;

[0009] An electrical box, installed on the second mounting plate, for electrically connecting to a cable wound around the outer circumference of the winding reel;

[0010] A driving structure, installed on the first mounting plate, for driving the winding reel to wind up the cable; and,

[0011] A limiting structure, installed on the first mounting plate, for limiting the rotation of the winding reel when the unwinding speed of the winding reel is greater than a preset value.

[0012] Optionally, the driving structure includes:

[0013] A circular ring, installed at the left end of the winding reel, with a toothed structure arranged along the circumferential direction on the inner side of the circular ring, and a ratchet structure arranged along the circumferential direction on the outer side of the circular ring;

[0014] A gear, rotatably installed on the first mounting plate along the left-right axis and meshing with the inner side of the circular ring;

[0015] A pawl, movably arranged on the first mounting plate, and having a first position where it engages with the outer side of the circular ring and a second position where it is separated from the circular ring in its moving stroke; and,

[0016] A rotating grip, rotatably installed on the first mounting plate and fixedly connected to the gear, for driving the gear to rotate;

[0017] Wherein, when the pawl is in the first position, the unwinding of the winding reel is restricted.

[0018] Optionally, an installation cavity is provided inside the first mounting plate;

[0019] The limiting structure includes:

[0020] A turntable, rotatably arranged on the left side wall of the installation cavity and detachably connected to the rotating shaft;

[0021] A clamping block, provided on the left end face of the turntable and extending along the circumferential direction of the turntable, including a connecting end and a clamping end, the connecting end is rotatably arranged on the turntable, and an elastic member is fixedly installed between the clamping end and the turntable; and,

[0022] A stop ring, fixedly installed on the left side wall of the installation cavity and sleeved on the outer circumference of the turntable, with a plurality of card slots opened along its circumferential direction on the inner side;

[0023] Wherein, when the unwinding speed of the winding reel is greater than the preset value, the clamping end of the clamping block rotates out from the turntable to clamp any one of the card slots.

[0024] Optionally, a plurality of the clamping blocks are arranged along the circumferential direction of the turntable, and correspondingly, a plurality of the elastic members are provided.

[0025] Optionally, the shore power cable winch further includes a connection structure, which is installed on the first mounting plate and is used to separate the turntable from the rotating shaft when the pawl is in the first position and connect the turntable to the rotating shaft when the pawl is in the second position.

[0026] Optionally, one end of the rotating shaft extends from the right side surface of the first mounting plate to the installation cavity of the first mounting plate;

[0027] The connection structure includes:

[0028] A disc, which is arranged in the installation cavity, is slidably arranged on the rotating shaft in the left-right direction, and is in non-rotating cooperation with the rotating shaft;

[0029] A slider, which is slidably arranged in the installation cavity in the left-right direction. A push block is fixedly installed at the lower end of the slider, and a ball member is rotatably connected to the left end of the slider; and

[0030] A push rod, which is slidably arranged in the installation cavity in the up-down direction. An installation end is arranged on one side of the push rod and extends to the outside of the first mounting plate for movably installing the pawl. The lower end of the push rod is a pushing end. When the push rod moves upward, the pushing end abuts against the push block so that the disc moves leftward to abut against the turntable.

[0031] Optionally, the push rod is in non-rotating cooperation with the second mounting plate. The upper end of the push rod penetrates through the first mounting plate and extends to the outside of the first mounting plate, and an external thread is provided on the outer periphery of its extended end. A screw sleeve is rotatably connected to the upper end of the first mounting plate, and the screw sleeve is threadedly connected to the extended end of the push rod.

[0032] Optionally, the shore power cable winch further includes a cable arranging structure, which is used to arrange the cable when the winding drum winds the cable.

[0033] Optionally, the cable arranging structure includes:

[0034] Two sliding rods, which are arranged between the first mounting plate and the second mounting plate in the left-right direction; and

[0035] Two rollers, which are arranged corresponding to the sliding rods one by one and are slidably arranged on the corresponding sliding rods in the left-right direction. The two rollers are arranged at intervals, and a channel is formed at their interval for the cable to pass through.

[0036] Optionally, lifting rings are fixedly installed at the upper ends of the first mounting plate and the second mounting plate.

[0037] In the technical solution of the present invention, the electrical box is electrically connected to the cable wound on the winding drum, and the cable is connected to the onshore power supply to provide electrical energy for the on-board equipment. The driving structure is used to wind up the cable wound on the winding drum. When it is necessary to wind up the cable, the driving structure drives the winding drum to rotate for winding. When it is not necessary to unwind the cable, pulling the end of the cable can drive the winding drum to perform the unwinding operation. When the unwinding speed of the winding drum is greater than the preset value, the limiting structure restricts the unwinding rotation of the winding drum to avoid the situation that the unwinding speed of the winding drum causes the cable to become loose and knotted and it is not easy to control the length of the unwound cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0039] Figure 1 A three-dimensional schematic diagram of an embodiment of the onshore power cable winch provided by the present invention;

[0040] Figure 2 For Figure 1 the side view structural schematic diagram of the winding drum in;

[0041] Figure 3 For Figure 1 the cross-sectional structural schematic diagram of the first mounting plate in;

[0042] Figure 4 For Figure 1 the cross-sectional structural schematic diagram of the first mounting plate from another perspective in.

[0043] Explanation of the reference numerals in the drawings:

[0044]

[0045] The realization of the object of the present invention, the functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] In view of this, the present invention provides a shore power cable winch, Figures 1 to 4 which is an embodiment of the present invention,

[0050] Please refer to Figures 1 to 3 , the shore power cable winch 100 includes a mounting frame 1, a winding assembly 2, an electrical box 3, a driving structure 4, and a limiting structure 5. The mounting frame 1 includes a first mounting plate 101 and a second mounting plate 102 arranged at intervals in the left-right direction. The winding assembly 2 includes a rotating shaft 201 and a winding drum 202. The rotating shaft 201 is arranged in the left-right direction between the first mounting plate 101 and the second mounting plate 102, and the winding drum 202 is sleeved on the outer periphery of the rotating shaft 201. The electrical box 3 is installed on the second mounting plate 102 and is used to be electrically connected to the cable wound around the outer periphery of the winding drum 202. The driving structure 4 is installed on the first mounting plate 101 and is used to drive the winding drum 202 to wind the cable. The limiting structure 5 is installed on the first mounting plate 101 and is used to limit the rotation of the winding drum 202 when the unwinding speed of the winding drum 202 is greater than a preset value.

[0051] In the technical solution of the present invention, the electric box 3 is electrically connected to the cable wound on the winding drum 202, and the cable is connected to the onshore power supply to provide electrical energy for the shipboard equipment. The driving structure 4 is used to wind up the cable wound on the winding drum 202. When it is necessary to wind up the cable, the driving structure 4 drives the winding drum to rotate for winding. When it is not necessary to unwind the cable, pulling the end of the cable can drive the winding drum to perform the unwinding operation. When the unwinding speed of the winding drum 202 is greater than the preset value, the limiting structure 5 restricts the unwinding rotation of the winding drum 202 to avoid the situation that the unwinding speed of the winding drum 202 causes the cable to become loose and knotted and it is not easy to control the length of the unwound cable. It should be noted that the winding drum 202 is in the form of a hollow porous structure, and the air flow inside the drum can better convect and dissipate heat with the inner ring cable, taking away the excess heat and better controlling the temperature rise of the cable. The mounting bracket 1 is a sheet metal bending and integral forming machine frame process. Since the main positioning dimensions are all cut by a numerical control machine tool, it has the characteristics of high standardization, high efficiency, and stable quality. Compared with the existing process, there is a very high improvement in production efficiency, standardization, and qualification rate. The set preset value is selected and determined according to the actual situation.

[0052] Further, please refer to Figure 2 Figure [the specific figure number is missing here], the driving structure 4 includes a circular ring 401, a gear 402, a pawl 403, and a rotating grip 404. The circular ring 401 is installed at the left end of the winding drum 202. A toothed structure is arranged along the circumferential direction on the inner side of the circular ring 401, and a ratchet structure is arranged along the circumferential direction on the outer side of the circular ring 401. The gear 402 is rotatably installed on the first mounting plate 101 along the left-right axis and meshes with the inner side of the circular ring 401. The pawl 403 is movably arranged on the first mounting plate 101 and has a first position where it engages with the outer side of the circular ring 401 and a second position where it is separated from the circular ring 401 during its moving stroke. The rotating grip 404 is rotatably installed on the first mounting plate 101 and is fixedly connected to the gear 402 to drive the gear 402 to rotate. Among them, when the pawl 403 is in the first position, the unwinding of the winding drum 202 is restricted.

[0053] By rotating the rotating grip 404, the gear 402 is driven to rotate. Since the inner side of the ring 401 has a toothed structure and is fixed on the winding reel 202, the rotation of the gear 402 can drive the winding reel 202 to rotate. Compared with directly connecting the winding reel 202 through the rotating grip 404 and driving the winding reel 202 to perform the winding operation, the method of driving through the gear 402 can effectively reduce the force required by the operator during winding, so as to achieve the effect of labor saving. And under the cooperation of the ratchet structure provided on the outer side of the ring 401 and the pawl 403, when the operator drives the winding reel 202 to wind, the pawl 403 will not engage with the ring 401. When the operator releases the rotating grip 404, under the dragging action of the gravity of the unrecovered part of the cable, the winding reel 202 will perform a rotary motion, so that the cable wound on the winding reel 202 will become loose. At this time, the pawl 403 will engage with the ring 401 to limit the rotary motion of the winding reel 202, without the operator continuously holding the rotating grip 404 for continuous operation, avoiding the situation that the cable wound on the winding reel 202 falls off when the operator releases the rotating grip 404. And integrating the ratchet structure and the toothed structure on the ring 401 reduces the manufacturing cost of parts and reduces the installation space of parts. In addition, the pawl 403 is movably arranged on the first mounting plate 101. When the pawl 403 is in the first position, the operator can perform the above-mentioned winding operation. When the pawl 403 is in the second position, that is, when the positive and negative rotation of the ring 401 is not restricted, the operator can perform the unwinding operation on the cable wound on the winding reel 202 by pulling the end of the cable. By configuring a gear transmission mechanism, the force for winding and unwinding is saved by 5-10 times. With a ratchet and pawl mechanism, one person can easily wind and unwind. Using the ratchet and pawl reverse stop function, it is safe and reliable. During the process of winding and unwinding the cable, when the operating force of the person is lost, the ratchet and pawl mechanism immediately performs a reverse stop action to lock the reel and prevent the reel from being released passively, ensuring personal safety.

[0054] Further, please refer to Figures 3 to 4, an installation cavity 6 is provided inside the first mounting plate 101; the limiting structure 5 includes a turntable 501, a clamping block 502 and a retaining ring. The turntable 501 is rotatably arranged on the left side wall of the installation cavity 6 and is detachably connected to the rotating shaft 201; the clamping block 502 is arranged on the left end face of the turntable 501 and extends along the circumferential direction of the turntable 501, including a connecting end 5021 and a clamping end 5022. The connecting end 5021 is rotatably arranged on the turntable 501, and an elastic member 7 is fixedly installed between the clamping end 5022 and the turntable 501; the retaining ring is fixedly installed on the left side wall of the installation cavity 6 and is sleeved on the outer periphery of the turntable 501, and a plurality of card slots 8 are opened along its circumferential direction on the inner side; wherein, when the unwinding speed of the winding drum 202 is greater than the preset value, the clamping end 5022 of the clamping block 502 rotates out from the turntable 501 to clamp any one of the card slots 8. When the unwinding speed of the winding drum 202 does not exceed the preset value, under the action of the elastic member 7, the clamping end 5022 on the clamping block 502 still remains on the turntable 501 and does not separate from the turntable 501. When the unwinding speed of the winding drum 202 exceeds the preset value, the clamping end 5022 of the clamping block 502 is separated from the turntable 501 under the action of centrifugal force and is clamped with any one of the card slots 8 on the retaining ring to limit the rotation of the winding drum 202, which can avoid the situation that the winding speed of the winding drum 202 is too fast, resulting in the cable wound on it being loose and knotted, and is convenient for the operator to control the length of the cable unwound. When the clamping block 502 restricts the unwinding rotation of the winding drum 202, only by rotating the winding drum 202 in the winding direction, under the action of the elastic member 7, the clamping end 5022 of the clamping block 502 is separated from the card slot 8, so that the winding drum 202 can still perform the unwinding action. In addition, since the clamping block 502 extends along the circumferential direction of the turntable 501 and the connecting end 5021 of the clamping block 502 is rotatably connected to the turntable 501, when the winding drum 202 performs the winding operation, the clamping block 502 will not be stuck in the groove. Only when the winding drum 202 performs the unwinding operation and the unwinding speed is too fast, the clamping block 502 will be embedded in the card slot 8 to limit the rotation of the winding drum 202.

[0055] Specifically, a plurality of the clamping blocks 502 are arranged along the circumferential direction of the turntable 501. Correspondingly, a plurality of the elastic members 7 are provided. By arranging a plurality of the clamping blocks 502, a better locking effect can be achieved when the unwinding speed of the winding drum 202 exceeds the preset value, and the situation of locking failure caused by one or more of the clamping blocks 502 being damaged can be avoided.

[0056] Please refer to Figure 4, the shore power cable winch 100 further includes a connection structure 9. The connection structure 9 is installed on the first mounting plate 101 and is used to separate the turntable 501 from the rotating shaft 201 when the pawl 403 is in the first position, and connect the turntable 501 and the rotating shaft 201 when the pawl 403 is in the second position. The connection state of the turntable 501 and the rotating shaft 201 can be selected through the cooperation state of the pawl 403 and the ring 401 to achieve the linkage effect of the pawl 403 and the ring 401.

[0057] Specifically, one end of the rotating shaft 201 extends from the right side surface of the first mounting plate 101 into the mounting cavity 6 of the first mounting plate 101; the connection structure 9 includes a disc 901, a slider 902 and a push rod 903. The disc 901 is arranged in the mounting cavity 6, slidably arranged on the rotating shaft 201 in the left-right direction, and is non-rotatably engaged with the rotating shaft 201; the slider 902 is slidably arranged in the mounting cavity 6 in the left-right direction, a push block 10 is fixedly installed at the lower end of the slider 902, and a ball member 11 is rotatably connected to the left end of the slider 902; the push rod 903 is slidably arranged in the mounting cavity 6 in the up-down direction, one side of the push rod 903 is provided with a mounting end 9031, and the mounting end 9031 extends to the outside of the first mounting plate 101 for movably installing the pawl 403. The lower end of the push rod 903 is a pushing end 9032. When the push rod 903 moves upward, the pushing end 9032 abuts against the push block 10, so that the disc 901 moves leftward to abut against the turntable 501.

[0058] Since the push rod 903 is slidably arranged up and down inside the first mounting plate 101, and the push rod 903 is located at the lower end of its sliding stroke in the initial state. At this time, the pawl 403 movably mounted on the mounting end 9031 of the push rod 903 is located at the first position, that is, engaged with the ring 401. At this time, the operator can perform the winding operation, and the rotating shaft 201 is not connected to the turntable 501. That is, in the winding operation, the turntable 501 will not rotate with the rotating shaft 201. On the one hand, it can avoid the continuous rotation of the turntable 501 during winding. The elastic member 7 correspondingly mounted on the turntable 501 needs to continuously work to offset the centrifugal force received by the corresponding block 502, thus shortening the service life of the elastic member 7. On the other hand, it can avoid the situation that when the winding speed is too fast, the block 502 spins out from the turntable 501 and continuously impacts the wall of the mounting cavity 6, generating noise. When the push rod 903 is located at the upper end of its sliding stroke, the pusher of the push rod 903 pushes the push block 10 to move to the left, that is, drives the slider 902 to move to the left and abut against the right end face of the turntable 501. Since the ball member 11 is provided at the left end of the slider 902, the rotation of the disk 901 with the rotating shaft 201 will not be affected by the abutting action of the slider 902. The disk 901 abuts against the turntable 501, so that the turntable 501 can be driven to rotate together when the rotating shaft 201 rotates, so as to achieve the purpose of restricting the rotation of the winding drum 202 when the unwinding speed is too fast.

[0059] Please refer to Figure 4 , the push rod 903 is non-rotatably fitted with the second mounting plate 102. The upper end of the push rod 903 penetrates through the second mounting plate 102 and extends to the outside of the second mounting plate 102, and an external thread is provided on the outer circumference of its extended end. A screw sleeve 12 is rotatably connected to the upper end of the second mounting plate 102, and the screw sleeve 12 is threadedly connected to the extended end of the push rod 903. By rotating the screw sleeve 12, the push rod 903 can move up and down in the first mounting plate 101, and the push rod 903 can be firmly fixed at any position on its sliding stroke.

[0060] Please refer to Figure 1 , in order to make the cables wound on the winding drum 202 arranged neatly, the shore power cable winch 100 further includes a wire arranging structure 13, and the wire arranging structure 13 is used to arrange the cables when the winding drum 202 winds the cables.

[0061] Specifically, the cable arrangement structure 13 includes two sliding rods 1301 and two rollers 1302. The two sliding rods 1301 are arranged between the first mounting plate 101 and the second mounting plate 102 in the left-right direction; the two rollers 1302 are arranged in one-to-one correspondence with the sliding rods 1301 and are slidably arranged on the corresponding sliding rods 1301 in the left-right direction. The two rollers 1302 are spaced apart, and a channel 14 is formed at their interval for the cable to pass through. The cable passes through between the two rollers 1302. During the winding process of the winding reel 202, the two rollers 1302 can clamp the cable and move left and right along the sliding rods 1301 according to the arrangement position of the cable on the winding reel 202, so as to prevent the cable from accumulating at the same position on the winding reel 202.

[0062] Please refer to Figure 1 , lifting rings 15 are fixedly installed at the upper ends of the first mounting plate 101 and the second mounting plate 102. Since the shore power cable winch 100 is relatively heavy, in order to facilitate its movement, the lifting rings 15 are provided on both the first mounting plate 101 and the second mounting plate 102. By connecting the external equipment to the lifting rings 15 and lifting the lifting rings 15 to change the position, it is possible to facilitate the operator to move the shore power cable winch 100.

[0063] It is worth noting that the shore power cable winch of the present invention also has a double manual pin locking device and a slip ring device. Through the double manual pin locking device, the reel can be locked during the transportation of the winch or the shaking of the ship to prevent the coiled cable from being loosely and chaotically wound. The slip ring device is an external assembled conductive slip ring, which can ensure the rotary conduction when the ship connects to the shore power, and the cable can be retracted and released without being twisted. The slip ring is convenient for installation and maintenance. When the winch is overhauled, only the external protective cover needs to be disassembled without releasing all the coiled cables, and the slip ring can be overhauled.

[0064] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An onshore power cable winch, characterized in that, Comprising: A mounting bracket, including a first mounting plate and a second mounting plate arranged at intervals in the left - right direction; A winding assembly, including a rotating shaft and a winding drum. The rotating shaft is arranged between the first mounting plate and the second mounting plate in the left - right direction, and the winding drum is sleeved on the outer periphery of the rotating shaft; An electrical box, mounted on the second mounting plate, for electrically connecting with a cable wound around the outer periphery of the winding drum; A driving structure, mounted on the first mounting plate, for driving the winding drum to wind the cable; And, A limiting structure, mounted on the first mounting plate, for restricting the rotation of the winding drum when the unwinding speed of the winding drum is greater than a preset value; The driving structure includes: A ring, mounted on the left end of the winding drum. A toothed structure is arranged along the circumferential direction on the inner side of the ring, and a ratchet structure is arranged along the circumferential direction on the outer side of the ring; A gear, rotatably mounted on the first mounting plate along the left - right axis and meshing with the inner side of the ring; A ratchet pawl, movably arranged on the first mounting plate, and having a first position where it engages with the outer side of the ring and a second position where it is separated from the ring in its moving stroke; and, A rotating grip, rotatably mounted on the first mounting plate and fixedly connected with the gear, for driving the gear to rotate; Wherein, when the ratchet pawl is in the first position, the unwinding of the winding drum is restricted; An installation cavity is provided inside the first mounting plate; The limiting structure includes: A turntable, rotatably arranged on the left side wall of the installation cavity and detachably connected with the rotating shaft; A clamping block, arranged on the left end face of the turntable and extending along the circumferential direction of the turntable, including a connecting end and a clamping end. The connecting end is rotatably arranged on the turntable, and an elastic member is fixedly installed between the clamping end and the turntable; and, A stop ring, fixedly installed on the left side wall of the installation cavity and sleeved on the outer periphery of the turntable, and a plurality of card slots are provided along the circumferential direction on its inner side; Wherein, when the unwinding speed of the winding drum is greater than the preset value, the clamping end of the clamping block spins out from the turntable to engage with any one of the card slots; A plurality of the clamping blocks are arranged along the circumferential direction of the turntable, and correspondingly, a plurality of elastic members are provided; The shore - power cable winch further includes a connecting structure, which is mounted on the first mounting plate, for separating the turntable from the rotating shaft when the ratchet pawl is in the first position and connecting the turntable with the rotating shaft when the ratchet pawl is in the second position; One end of the rotating shaft extends from the right side face of the first mounting plate into the installation cavity of the first mounting plate; The connecting structure includes: A disc, arranged in the installation cavity, slidably arranged on the rotating shaft in the left - right direction and in non - rotating cooperation with the rotating shaft; A slider, slidably arranged in the installation cavity in the left - right direction. A push block is fixedly installed at the lower end of the slider, and a ball member is rotatably connected to the left end of the slider; The push rod is slidably arranged in the up-and-down direction in the installation cavity. One side of the push rod is provided with an installation end, and the installation end extends to the outside of the first mounting plate for movably mounting the pawl. The lower end of the push rod is set as a pushing end. When the push rod moves upward, the pushing end abuts against the push block so that the disc moves leftward to abut against the turntable.

2. The shore power cable winch according to claim 1, characterized in that, The push rod is in anti-rotation cooperation with the second mounting plate. The upper end of the push rod penetrates through the first mounting plate and extends to the outside of the first mounting plate, and an external thread is provided on the outer periphery of its extended end. A screw sleeve is rotatably connected to the upper end of the first mounting plate, and the screw sleeve is threadedly connected to the extended end of the push rod.

3. The shore power cable winch according to claim 1, characterized in that, The shore power cable winch further includes a cable arranging structure for arranging the cable when the cable is wound on the winding drum.

4. The shore power cable winch according to claim 3, characterized in that, The cable arranging structure includes: Two sliding rods arranged in the left-and-right direction between the first mounting plate and the second mounting plate; and Two rollers arranged in one-to-one correspondence with the sliding rods and slidably arranged on the corresponding sliding rods in the left-and-right direction. The two rollers are spaced apart, and a channel is formed at the interval therebetween for the cable to pass through.

5. The shore power cable winch according to claim 1, characterized in that, Lifting rings are fixedly installed at the upper ends of both the first mounting plate and the second mounting plate.

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