Winch with rope guide and load protection

Abstract

The present invention relates to a winch with rope arrangement and load protection, comprising: a frame, a rope arrangement device installed in the frame and located in the front, a drum installed in the frame and located behind the rope arrangement device, the two being arranged in parallel, a hydraulic motor and a reduction assembly fixedly connected to the frame on both sides of the drum, and a brake mechanism arranged inside the drum near the hydraulic motor side, and the winch is also provided with a load protection device between the brake mechanism and the reduction assembly; the load protection device is inside the drum, which saves space and will not be disturbed by the external environment. The mechanical transmission structure can obtain stable and reliable reaction actions after testing a reasonable parameter for each action-related component during manufacturing. Therefore, it is more reliable than the existing method of monitoring cable tension, and the load protection device can automatically reset at the last moment of shutdown, so that the operator only needs to eliminate the cable entanglement to resume the operation immediately.

Description

Technical Field

[0001] The invention belongs to the technical field of winches, and in particular relates to a winch with a rope arrangement and load protection. Background Art

[0002] Among various types of winches, when the matching cable is long, it is generally necessary to match it with a rope arrangement device to arrange the cable evenly and orderly when storing it. For example, the Chinese utility model patent with authorization announcement number CN201320506549.9 discloses a rope arrangement device for a winch. The improvement lies in positioning the rope-receiving and releasing processes of the winch, so that the wire ropes can be arranged in an orderly manner on the drum, and the influence of the disordered and cross-stored wire ropes on the life of the wire ropes can be avoided. Generally, winches with rope-laying devices are also used for long-distance traction, such as the collection and release of temporary cables across rivers and bridges. During the long-distance reeling process, the probability of the cable being entangled or tripped by foreign objects on the way increases. If the cable is entangled or tripped by foreign objects and is not stopped in time, the cable is very likely to break and be damaged. For this reason, electronic devices are often provided in the prior art to monitor the tension of the cable. When the tension exceeds the preset value, that is, the load is overloaded, the power is actively shut down. However, the electronic device has a high probability of failure in adverse outdoor environments. Therefore, in these usage scenarios, the cable must be further protected, and the winch also needs to have a protection device that can stably make the traction immediately fail when the load is overloaded. Summary of the invention

[0003] In view of the above problems, the present invention provides a winch with rope arrangement and load protection. When the winch is arranging and winding the rope, the anti-overload protection device composed of the mechanical structure can stably and immediately make the traction ineffective when the cable is entangled or tripped by foreign objects.

[0004] The invention objective of the present invention is achieved through the following technical solutions: A winch with rope arrangement and load protection, comprising: a frame, a rope arrangement device installed in the frame and located in the front, a drum installed in the frame and located behind the rope arrangement device, and the two are arranged in parallel, the two sides of the drum are respectively a hydraulic motor and a reduction assembly fixedly connected to the frame, and a brake mechanism is arranged inside the drum near the hydraulic motor side, and the winch is also provided with a load protection device between the brake mechanism and the reduction assembly;

[0005] The output shaft of the hydraulic motor passes through the brake mechanism and is detachably fixedly connected to one end of the load protection device, and the receiving input shaft of the reduction assembly is detachably fixedly connected to the other end of the load protection device; the output end of the reduction assembly is an external gear, which is directly meshed and connected with a drum provided with a matching internal gear ring. When the overall wire-winding operation is in progress, the output shaft of the hydraulic motor passes through the brake mechanism to transmit power to the load protection device, and the load protection device transmits power to the receiving input shaft of the reduction assembly, and the reduction assembly then transmits power back to the drum. The rope-laying device is started synchronously at the same time as the hydraulic motor is started. During the rope-winding process, when the cable is entangled by foreign objects, the traction force of the drum pulling the cable increases, and when the traction force reaches the set value, it will trigger the load protection device to start, and the power output by the hydraulic motor is interrupted, the cable is protected, and the load protection device can be automatically reset after the motor is shut down.

[0006] Preferably, the trigger load protection device includes a movable sleeve with the largest diameter located in the middle, and a transmission long shaft coaxial with and penetrating the movable sleeve; the main part of the movable sleeve is integrally provided with a bearing mounting portion at one end, and a connecting portion extends far from the same end and the bearing mounting portion, and the connecting portion is connected to the receiving input shaft of the reduction assembly; the edge of the other end of the main part of the movable sleeve has a constriction with a diameter that decreases inward, and a plurality of connecting blocks are fixedly arranged at equal intervals on the inner wall of the constriction, and the side of the connecting block away from the inner wall of the constriction is an arc surface, and the end facing the inside of the movable sleeve has an extended section, the shape of the extended section tends to be gradually smaller, and there are two avoidance grooves on the arc surface of the extended section; a section of the transmission long shaft facing the constriction side has a connecting keyway, and a bearing is sleeved at the other end. The movable sleeve is an integrated design structure with better strength.

[0007] Preferably, the trigger load protection device further comprises an axial fixed ring seat rotatably connected to the transmission shaft, a first spring top-connected swivel which is rotatably matched with the axial fixed ring seat and has one end abutting against the axial fixed ring seat and the other end being a free end, a second spring top-connected swivel which is coaxial with the first spring top-connected swivel and spaced apart, and a compression spring which is coaxial and has one end fixed to the first spring top-connected swivel and the other end fixed to the second spring top-connected swivel. The first spring top-connected swivel, the second spring top-connected swivel, and the compression spring are combined to provide friction between the cam surfaces, and the load is borne by the friction force, that is, the elastic force of the compression spring determines the load at which the overload protection is switched, and the space inside and outside the setting position of the compression spring is left empty, and the size and specifications thereof can be selected in a wide range.

[0008] Preferably, the axial fixed ring seat is installed against the main body of the movable sleeve and is the inner bottom wall facing the bearing mounting part; the first spring top-connected swivel ring, the second spring top-connected swivel ring, and the compression spring are all inside the movable sleeve. This design makes the structure compact and occupies little space.

[0009] Preferably, the trigger load protection device also includes a driven cam member rotatably connected to the transmission shaft, an active cam member contacting and cooperating with the cam surface of the driven cam member and connected to the connecting keyway, a fixed retaining ring at the plane end of the active cam member and the transmission shaft through a radially arranged connecting pin to complete the connection between the two, a driving connection sleeve sleeved on the outer periphery of the active cam member and the driven cam member and transmitting through the way of contact with the two; a second spring top-connected swivel sleeve rotatably mounted on the back side of the cam side of the driven cam member. The power transmission selects the contact and cooperation of the cam surface, so that the balance point can be automatically found in cooperation with the compression spring, that is, within a certain contact range of the two inclined surfaces, the transmission is continuously effective, and once the load is too large, slippage occurs between the two inclined surfaces, the compression spring is squeezed, the connection structure is disengaged, and the traction fails, thus achieving the purpose of protection.

[0010] Preferably, the active cam member and the driven cam member both have a flat surface at one end and a cam surface at the other end, the cam surface being composed of two sections of relatively gentle slope surfaces connected with two sections of relatively steep slope surfaces, the relatively gentle slope surface being defined as a long slope surface, and the relatively steep slope surface being defined as a short slope surface, the two long slope surfaces on the active cam member being defined as a first long slope surface, and the short slope surface being defined as a first short slope surface, the two long slope surfaces on the driven cam member being defined as a second long slope surface, and the short slope surface being defined as a second short slope surface; the active cam member and the driven cam member have the same outer diameter, and raised resistance portions are provided on the outer circumferential surfaces corresponding to the intersection of the long slope surfaces and the short slope surfaces, the resistance portion of the active cam member being defined as a driving wheel resistance portion, and the resistance portion of the driven cam member being defined as a driven wheel resistance portion.

[0011] Preferably, one end of the drive connection sleeve is a spline structure and the other end is a sleeve-like structure. The inner hole side wall of the sleeve structure has a protruding blocking section with opposite diameters. One end of the spline is fixedly connected to the output shaft of the hydraulic motor. The blocking section contacts the contact part of the driving wheel after the drive connection sleeve is installed as a whole. The design of the sleeve structure and the blocking section is similar to the key connection commonly used in the connection with the shaft sleeve, and the connection is reliable and stable.

[0012] Preferably, the end surface of the driven cam member facing the driving connecting sleeve is provided with engaging holes that match the number, position and shape of the connecting block.

[0013] Preferably, a blocking door is provided in the joint hole, the shape of which fits the arc surface of the joint hole, one end of the blocking door is hinged on the bottom surface of the joint hole, and the other end is cylindrical. The weight of the column increases the centrifugal force, making it convenient to set the counterweight to adjust the opening and closing timing of the blocking door.

[0014] Preferably, a magnetic stone is provided on the arc surface of the joint hole. The magnetic stone ensures that the blocking door is adsorbed after the centrifugal force is reduced to a certain extent, so that the space of the joint hole is completely open and ready for joint.

[0015] In summary, the present invention has the following advantages compared with the prior art:

[0016] The winch of the present invention is designed with a load protection device inside the drum, thereby saving space and not being disturbed by the external environment. The mechanical transmission structure can obtain stable and reliable reaction actions after testing a reasonable parameter for each action-related component during manufacturing. Therefore, it is more reliable than the existing method of monitoring cable tension, and the load protection device can automatically reset at the last moment of shutdown, so that the operator only needs to eliminate the cable entanglement to resume the operation immediately. Therefore, the present invention has achieved good performance in space utilization, operation efficiency and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall structure of the present invention from another angle;

[0019] Figure 3 It is a right side view of the present invention;

[0020] Figure 4 for Figure 3 Full section view at AA in the middle;

[0021] Figure 5 This is a schematic diagram of the structure of the present invention after the rope arrangement device and the drum are hidden;

[0022] Figure 6 is a structural schematic diagram of a load protection device;

[0023] Figure 7 It is the exploded view of the parts of the load protection device;

[0024] Figure 8 A schematic diagram of the structure of the load protection device after the movable connecting sleeve is hidden;

[0025] Fig. 9 A schematic diagram of the structure of the load protection device after hiding the movable connecting sleeve and the driving connecting sleeve;

[0026] Fig.10 It is a structural schematic diagram of the movable connecting sleeve;

[0027] Fig.11 It is a schematic diagram of the structure after the transmission long shaft, the driven cam member and the active cam member are combined;

[0028] Fig.12 It is a schematic diagram of the structure of the drive connecting sleeve;

[0029] Fig.13 for Fig.11A partial enlarged view of the middle A;

[0030] Fig.14 It is a schematic diagram of the structure after the driving connecting sleeve, the driven cam member and the active cam member are combined.

[0031] Markings in the figure:

[0032] Frame 01, bearing 02, fixed retaining ring 03, magnetic stone 04, rope arrangement device 100, drum 200, hydraulic motor 300, deceleration assembly 400, brake mechanism 500, load protection device 600, movable connecting sleeve 610, bearing mounting portion 612, connecting portion 613, shrinkage 614, connecting block 615, avoidance groove 616, transmission long shaft 620, connecting keyway 621, axial fixed ring seat 630, first spring top connecting swivel 640, second spring top connecting swivel 650, compression spring 660, driven cam member 670, driven wheel resistance portion 671, second long slope 672, second short slope 673, engaging hole 674, active cam member 680, active wheel resistance portion 681, first long slope 682, first short slope 683, drive connecting sleeve 690, blocking section 691, blocking door 700. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0034] Example 1

[0035] like Figure 1-5 As shown, a winch with a rope arrangement and load protection, whose basic structure is similar to the winch with a rope arrangement in the prior art, comprises: a frame 01, a rope arrangement device 100 installed in the frame 01 and located in the front, and a drum 200 located in the rear and arranged in parallel with the two, the two sides of the drum 200 are respectively a hydraulic motor 300 and a reduction assembly 400 fixedly connected to the frame 01, and a brake mechanism 500 is arranged inside the drum 200 near one side of the hydraulic motor 300 and a load protection device 600 is arranged between the brake mechanism 500 and the reduction assembly 400;

[0036] The output shaft of the hydraulic motor 300 passes through the brake mechanism 500 and is detachably fixedly connected to one end of the load protection device 600. The receiving input shaft of the reduction assembly 400 is detachably fixedly connected to the other end of the load protection device 600. The output end of the reduction assembly 400 is an external gear, which is directly meshed and connected with the drum 200 provided with matching internal teeth. When the overall line is taken up, the output shaft of the hydraulic motor 300 passes through the brake mechanism 500 to transmit power to the load protection device 600. The load protection device 600 transmits power to the receiving input shaft of the reduction assembly 400. The reduction assembly 400 then transmits power back to the drum 200. The hydraulic motor 30 0 is started and the rope-laying device 100 is started synchronously. The rope-laying device 100 of this embodiment is driven by a lead screw. This is the prior art and will not be elaborated on. During the rope-collecting process, when the cable is entangled by foreign objects, the traction force of the drum 200 pulling the cable increases. When the traction force reaches the set value, the load protection device 600 is triggered to start. After the load protection device 600 is started, the power output by the hydraulic motor 300 is interrupted in triggering the load protection device 600, and the cable is protected. The operator turns off the motor. The load protection device 600 can automatically reset after the motor is turned off. After the foreign object is eliminated, the operator can check that it is ready and then start it normally to continue the operation.

[0037] like Figure 6 As shown, the trigger load protection device 600 includes a movable connecting sleeve 610 located in the middle and having a relatively large diameter, and a transmission long shaft 620 coaxial with and penetrating the movable connecting sleeve 610; Fig.10 As shown, the outermost circle and the largest body are the main part; the main part of the movable connecting sleeve 610 is integrally provided with a bearing mounting portion 612 at one end, and a connecting portion 613 is extended to the far end of the same end and the bearing mounting portion 612, and the connecting portion 613 is connected to the receiving input shaft of the reduction assembly 400; the other end edge of the main part of the movable connecting sleeve 610 has a constriction 614 with a diameter reduced inward, and a plurality of connecting blocks 615 are fixedly arranged at equal intervals on the inner wall of the constriction 614, and the side of the connecting block 615 away from the inner wall of the constriction 614 is an arc surface, and the end facing the inside of the movable connecting sleeve 610 has an extended section, the shape of the extended section tends to be gradually reduced, and there are two avoidance grooves 616 on the arc surface of the extended section; the section of the transmission long shaft 620 facing the constriction 614 has a connecting keyway 621, and the other end is sleeved with a bearing 02, and the transmission long shaft 620 is rotatably connected and combined with the movable connecting sleeve 610 through the matching connection of the bearing 02 and the bearing mounting portion 612.

[0038] like Figure 7As shown, the trigger load protection device 600 also includes an axial fixed ring seat 630 rotatably connected to the transmission long shaft 620, a first spring top-connected swivel 640 rotatably matched with the axial fixed ring seat 630 and having one end abutting against the axial fixed ring seat 630 and the other end being a free end, a second spring top-connected swivel 650 coaxial with the first spring top-connected swivel 640 and spaced apart, and a compression spring 660 coaxial with one end fixed to the first spring top-connected swivel 640 and the other end fixed to the second spring top-connected swivel 650;

[0039] The axial fixing ring seat 630 is installed against the inner bottom wall of the main part of the movable connecting sleeve 610 facing the bearing mounting part 612. After installation, the axial fixing ring seat 630 is fixed in the axial direction and can rotate along the axis. The first spring top-connected swivel 640, the second spring top-connected swivel 650, and the compression spring 660 are all located inside the movable connecting sleeve 610. After the second spring top-connected swivel 650 is subjected to force, the compression spring 660 is compressed, and the second spring top-connected swivel 650 obtains axial movement along the transmission long axis 620.

[0040] like Fig. 9 As shown, the trigger load protection device 600 also includes a driven cam member 670 rotatably connected to the transmission shaft 620, an active cam member 680 which contacts and cooperates with the cam surface of the driven cam member 670 and has a protrusion on the inner hole wall to serve as a key and connect to the keyway 621, a fixed retaining ring 03 at the flat end of the active cam member 680 and the transmission shaft 620 through a radially arranged connecting pin to complete the fixation of the two, a driving connecting sleeve 690 which is sleeved on the outer periphery of the active cam member 680 and the driven cam member 670 and transmits power to the two by means of friction; a second spring top-connected swivel 650 is rotatably sleeved on the back side of the cam side of the driven cam member 670.

[0041] like Fig.12 and Figure 7 As shown, the active cam member 680 and the driven cam member 670 are both flat at one end and a cam surface at the other end. The cam surface is composed of two sections of relatively gentle slope surfaces connected with two sections of relatively steep slope surfaces. The relatively gentle slope surface is defined as a long slope surface, and the relatively steep slope surface is defined as a short slope surface. The two long slope surfaces on the active cam member 680 are defined as a first long slope surface 682, and the short slope surface is defined as a first short slope surface 683. The two long slope surfaces on the driven cam member 670 are defined as a second long slope surface 672, and the short slope surface is defined as a second short slope surface 673. The active cam member 680 and the driven cam member 670 have the same outer diameter, and raised resistance parts are provided on the outer circumferential surfaces corresponding to the intersection of the long slope surface and the short slope surface. The resistance part of the active cam member 680 is defined as a driving wheel resistance part 681, and the resistance part of the driven cam member 670 is defined as a driven wheel resistance part 671.

[0042] like Fig.12As shown, one end of the drive connection sleeve 690 is a spline structure and the other end is a sleeve-like structure. The inner hole side wall of the sleeve structure has a convex block section 691 with a diameter opposite to the diameter. One end of the spline is fixedly connected to the output shaft of the hydraulic motor 300. The block section 691 is as shown in FIG. Fig.14 As shown, after the driving connecting sleeve 690 is integrally installed, it contacts with the driving wheel contact portion 681. At this time, under the thrust of the compression spring 660, the driven wheel contact portion 671 does not contact with the surface of the blocking section 691 in the rotation direction, that is, the driven wheel contact portion 671 has space for sliding and rotating, so that the driven cam member 670 can move axially.

[0043] like Fig.11 As shown, the end face of the driven cam member 670 facing the driving connecting sleeve 690 is provided with engaging holes 674 that match the number, position and shape of the connecting block 615. The size of the engaging holes 674 is slightly larger than the connecting block 615 so that the two can be more easily engaged under slow rotation. During operation, if the cable is entangled by foreign objects and the traction force increases, the engaging holes 674 and the connecting block 615 will be disengaged. At the moment of disengagement, the load of the driven cam member 670 immediately becomes very small, so it will be driven by the active cam member 680 to rotate rapidly, and the engaging holes 674 and the connecting block 615 cannot be engaged under rapid rotation, so the movable connecting sleeve 610 stops rotating and the corresponding drum 200 also stops, thereby ensuring that the cable is not pulled further.

[0044] In addition, in order to prevent the connection block 615 from entering the engagement hole 674 even when the driven cam member 670 rotates at a relatively slow speed, and to allow the connection block 615 to enter the engagement hole 674 when the driven cam member 670 is about to stop rotating for the last one or two turns, a blocking door 700 that automatically opens by centrifugal force is provided in the engagement hole 674. Fig.13 As shown, the shape of the blocking door 700 fits the arc surface of the engaging hole 674, one end of the blocking door 700 is hinged on the bottom surface of the engaging hole 674, and the other end is cylindrical, as a counterweight, a magnetic stone 04 is provided on the arc surface of the engaging hole 674, when the driven cam member 670 rotates rapidly, the centrifugal force will get rid of the suction force of the magnetic stone 04 so that the blocking door 700 is in an open state, and the height of the blocking door 700 is flush with the end surface of the driven cam member 670, so that even if the connecting block 615 comes to the engaging hole 674 The two positions will not be fully engaged because they are blocked by the blocking door 700, so the drum 200 remains stagnant and the cable will not be pulled any further. When the stop button of the hydraulic motor 300 is pressed, the speed of the driven cam 670 gradually decreases, and the weight of the blocking door 700 is designed so that in the last few turns the weight overcomes the centrifugal force and returns to the initial position and is adsorbed by the magnetic stone 04, so that the connecting block 615 can be engaged with the engaging hole 674 in the last few turns. At this time, the hydraulic motor 300 also stops completely.

[0045] The active cam member 680, the driven cam member 670 and the transmission long shaft 620 are combined as shown in FIG. Fig.11 As shown in Figure 2, the dynamic relationship between the three is as follows: Figure 8-9 As shown, under the action of the compression spring 660, the first long slope surface 682 and the second long slope surface 672 conflict with each other, and the fixed retaining ring 03 limits the movement of the active cam member 680, that is, the active cam member 680 and the driven cam member 670 are in a balanced state under the action of the compression spring 660. At this time, the rotation of the active cam member 680 will drive the driven cam member 670 to rotate together. If the driven cam member 670 is loaded under the external force, the first long slope surface 682, the second long slope surface 672 and the compression spring 660 will find a balance point again. That is, under the load, the contact position of the first long slope surface 682 and the second long slope surface 672 is transferred from the low position to the high position. The compression spring 660 is further squeezed to provide a greater reaction force, so that the friction force between the first long slope surface 682 and the second long slope surface 672 increases. In this way, after the balance, it can carry a larger load. At this time, the movable connecting sleeve 610 is through When the connecting block 615 is engaged with the engaging hole 674 to transmit power, the load increases, which is equivalent to the displacement of the driven cam member 670 toward the side of the compression spring 660, that is, the engagement depth of the connecting block 615 and the engaging hole 674 is decreasing. When the load increases to a certain value (or a set value), the connecting block 615 will completely disengage from the engaging hole 674. At this time, as mentioned above, the connecting block 615 cannot immediately return to the engaging hole 674, and the plane contact friction at the end face engaging hole 674 of the connecting block 615 is in. At this time, the brake mechanism 500 is set to intervene to ensure the stability of the drum 200. Although the connecting block 615 is in a friction state, the operator is in an operating state and will immediately shut down the hydraulic motor 300. Therefore, the friction damage is not great. After shutting down the hydraulic motor 300, the connecting block 615 re-enters the engaging hole 674 as mentioned above to complete the reset. The overall action process achieves the purpose of controlling overload and protecting the cable.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A winch with a rope arrangement and load protection, comprising: A frame (01), a rope arrangement device (100) installed in the frame (01) and located in the front, a drum (200) installed in the frame (01) and located behind the rope arrangement device (100), the two being arranged in parallel, a hydraulic motor (300) and a reduction assembly (400) being respectively provided on both sides of the drum (200) and fixedly connected to the frame (01), and a brake mechanism (500) being provided inside the drum (200) and close to one side of the hydraulic motor (300), wherein the winch is further provided with a load protection device (600) between the brake mechanism (500) and the reduction assembly (400); The output shaft of the hydraulic motor (300) passes through the brake mechanism (500) and is detachably fixedly connected to one end of the load protection device (600). The receiving input shaft of the reduction assembly (400) is detachably fixedly connected to the other end of the load protection device (600). The output end of the reduction assembly (400) is an external gear, which is directly meshed and connected with a drum (200) provided with a matching internal gear ring. When the overall wire-winding operation is in progress, the output shaft of the hydraulic motor (300) passes through the brake mechanism (500) to transmit power to the load protection device (600). The load protection device (60 0) transmits power to the receiving input shaft of the reduction assembly (400), and the reduction assembly (400) then transmits power back to the drum (200). The hydraulic motor (300) is started and the rope arrangement device (100) is started synchronously. During the rope collection process, when the cable is entangled by foreign objects, the traction force of the drum (200) pulling the cable increases. When the traction force reaches a set value, the load protection device (600) is triggered to start, and the power output by the hydraulic motor (300) is interrupted, so that the cable is protected. The load protection device (600) can be automatically reset after the motor is turned off; The trigger load protection device (600) comprises a movable connecting sleeve (610) located in the middle and having the largest diameter, and a transmission long shaft (620) coaxial with and penetrating the movable connecting sleeve (610); a main body of the movable connecting sleeve (610) is integrally provided with a bearing mounting portion (612) at one end thereof, and a connecting portion (613) extends from the same end and the bearing mounting portion (612) to the far end, and the connecting portion (613) is connected to the receiving input shaft of the reduction assembly (400); an edge of the main body of the movable connecting sleeve (610) at the other end thereof A constriction (614) with a diameter that decreases inwardly is provided, and a plurality of connection blocks (615) are fixedly arranged at equal intervals on the inner wall of the constriction (614); the side of the connection block (615) away from the inner wall of the constriction (614) is an arc surface, and the end facing the inside of the movable connection sleeve (610) has an extended section, the shape of the extended section tends to be gradually smaller, and the extended section has two avoidance grooves (616) on the arc surface; a section of the transmission long shaft (620) facing the constriction (614) has a connection keyway (621), and the other end is sleeved with a bearing (02); The trigger load protection device (600) further comprises an axial fixed ring seat (630) rotatably connected to the transmission long shaft (620), a first spring top-connected swivel (640) rotatably matched with the axial fixed ring seat (630) and having one end abutting against the axial fixed ring seat (630) and the other end being a free end, a second spring top-connected swivel (650) coaxial with the first spring top-connected swivel (640) and spaced apart, and a coaxial compression spring (660) having one end fixed to the first spring top-connected swivel (640) and the other end fixed to the second spring top-connected swivel (650); The axial fixed ring seat (630) is installed close to the main body of the movable connection sleeve (610) and is the inner bottom wall facing the bearing mounting portion (612); the first spring top-connected rotating ring (640), the second spring top-connected rotating ring (650), and the compression spring (660) are all located inside the movable connection sleeve (610); The trigger load protection device (600) further comprises a driven cam member (670) rotatably connected to the transmission shaft (620), an active cam member (680) contacting and cooperating with the cam surface of the driven cam member (670) and connected to the connecting keyway (621), a fixed retaining ring (03) at the plane end of the active cam member (680) and connected to the transmission shaft (620) by radially arranged connecting pins, and a driving connecting sleeve (690) sleeved on the outer periphery of the active cam member (680) and the driven cam member (670) and transmitting through the two by means of abutment; and a second spring top-connecting swivel (650) rotatably sleeved on the back side of the cam side of the driven cam member (670).

2. The winch with a rope arrangement and load protection according to claim 1, characterized in that: The active cam member (680) and the driven cam member (670) are both flat at one end and cam surfaces at the other end. The cam surfaces are composed of two sections of relatively slow slope surfaces connected to two sections of relatively fast slope surfaces. The relatively slow slope surface is defined as a long slope surface, and the relatively fast slope surface is defined as a short slope surface. The two long slope surfaces on the active cam member (680) are defined as a first long slope surface (682), and the short slope surface is defined as a first short slope surface (683). The two long slope surfaces on the driven cam member (670) are defined as a second long slope surface (672), and the short slope surface is defined as a second short slope surface (673). The active cam member (680) and the driven cam member (670) have the same outer diameter, and a raised contact portion is provided on the outer circumferential surface corresponding to the intersection of the long slope surface and the short slope surface. The contact portion of the active cam member (680) is defined as a driving wheel contact portion (681), and the contact portion of the driven cam member (670) is defined as a driven wheel contact portion (671).

3. The winch with a rope arrangement and load protection according to claim 1, characterized in that: The drive connection sleeve (690) has a spline structure at one end and a sleeve-like structure at the other end. The inner hole side wall of the sleeve structure has a diametrically opposite blocking section (691) with a protrusion. The spline end is fixedly connected to the output shaft of the hydraulic motor (300). After the drive connection sleeve (690) is installed as a whole, the blocking section (691) contacts the driving wheel contact portion (681).

4. The winch with rope arrangement and load protection according to claim 1, characterized in that: The end surface of the driven cam member (670) facing the driving connection sleeve (690) is provided with engagement holes (674) that match the number, position and shape of the connection block (615).

5. The winch with rope arrangement and load protection according to claim 4, characterized in that: A blocking door (700) is provided in the joint hole (674), the outer shape of the blocking door (700) being fitted to the arc surface of the joint hole (674), one end of the blocking door (700) being hinged to the bottom surface of the joint hole (674) and the other end being cylindrical.

6. The winch with rope arrangement and load protection according to claim 5, characterized in that: A magnetic stone (04) is provided on the arc surface of the engagement hole (674).

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