A spool device

Abstract

The application provides a winding drum device, which comprises a wall frame, two parallel arranged winding drums, a rope head fixing device, two winding drum driving motors and a lower limit device, wherein the lower limit device comprises a press roller, a spring device and a lower limit travel switch, the lower limit support is arranged on both sides of the press roller, the spring device is arranged on both sides of the press roller, one end of the spring device is connected with the lower limit support, the other end of the spring device is connected with one end of the press roller, the lower limit support is connected with both ends of the press roller through the spring device, the lower limit travel switch is arranged on the lower limit support on one side of the press roller, and the spring device is movably arranged between the lower limit travel switch and both ends of the press roller; during operation, single winding drum independent operation can be realized, and double winding drums can be simultaneously operated, and high synchronism and high safety are achieved.

Description

Technical Field

[0001] This invention relates to the field of crane lifting equipment technology, and specifically to a drum device. Background Technology

[0002] Currently, in actual crane lifting operations, the crane lifting equipment is used to lift or lower goods and is a crucial mechanism within the crane. Its performance directly affects the overall performance of the crane. Traditional cranes, due to their large overall weight, not only increase economic costs and waste space resources but also limit the crane's lifting range. Existing cranes are generally equipped with a drum device for winding wire ropes. However, when lifting items with high safety requirements, such as hydraulic pumps, a broken wire rope poses a safety hazard. To address this technical problem, Chinese patent application CN202011459785.0, published on April 27, 2021, discloses a double-drum crane lifting device, including a base, a drive assembly, a wire drum, and a cable drum. The base includes a first seat body and a second seat body. The first and second seats are spaced apart, with a weighing sensor between them. The second seat is slidably connected to the guide rail. A drive assembly is connected to the first seat. A wire reel and a cable reel are also present. The wire reel is connected to the drive assembly, and the cable reel is connected to the wire reel and driven synchronously by the drive assembly. The drive assembly drives the wire wound on the wire reel and the cable wound on the cable reel to connect with the lifting device to control the lifting device. The wire reel and cable reel are set separately and rotate synchronously, which reduces the number of wire reels and cable reels, thereby reducing the overall size of the crane. It also allows for the control of clamps at different heights for gripping operations, thus expanding the crane's application range. However, this device only uses a single wire rope drum for lifting, which is not very safe. Existing lifting equipment with two drums typically uses two drums connected in series to form a single drum, which is essentially a single drum. Both drums rotate simultaneously, so when lifting does not require two drums, it is impossible to use a single drum for lifting, thus increasing operating costs and wasting energy. Summary of the Invention

[0003] The purpose of this invention is to provide a drum device that can enable a single drum to operate independently or two drums to operate simultaneously during operation, and has high safety, simple structure, and cost-saving features.

[0004] To achieve the above objectives, a winding device includes a wall frame, two parallel winding drums, a rope end fixing device, two winding drum drive motors, and a lower limit device. The lower limit device includes a pressure roller, a spring device, and a lower limit travel switch. The lower limit bracket is mounted on both sides of the pressure roller. The spring device is disposed on both sides of the pressure roller, with one end connected to the lower limit bracket and the other end connected to one end of the pressure roller. The lower limit bracket is connected to both ends of the pressure roller via the spring device. The lower limit travel switch is disposed on the lower limit bracket on one side of the pressure roller. The spring device is movably disposed between the lower limit travel switch and both ends of the pressure roller. The spring device includes a spring, and the spring is in a self-limiting position... In the normal state, the pressure roller is in contact with the drum, the lower limit limit switch is working, and when the spring is compressed, one end of the limit switch is connected to the spring device, triggering the lower limit limit switch to stop working. The pressure roller has inclined parts on both sides that are inclined upward and inward. The wall frame is set at both ends of the drum, and the two ends of the drum are rotatably connected to the wall frame respectively. The drum drive motor is set on the wall frame at one end of the drum, and the output end of the drum drive motor is connected to one end of the drum. A gap is set between the two drums, and the pressure roller is set in the gap between the drums. The two drums are symmetrically arranged relative to the pressure roller, and the pressure roller is connected to the two drums respectively. The lower limit bracket is fixedly connected to the upper end of the wall frame, and the rope end fixing device is set at one end of the drum.

[0005] The above setup utilizes two parallel drums mounted on the wall frame, allowing two steel wire ropes to be wound onto each drum. This design enables the lifting of items using both wire ropes, preventing safety issues caused by a single broken rope. A pressure roller contacts both drums, and a drum drive motor is mounted on the wall frame at one end of each drum, driving the drums to rotate. The pressure roller device placed between the drums ensures stable and orderly lowering and lifting of the steel wire ropes, preventing tangling between the drums. The rope phenomenon; in addition, two drums are pressed together by a pressure roller. During the rope unwinding process, the wire rope is wound around the drum through the rope end fixing device. When the two drums reach the lower limit position, the pressure roller contacts the drum, causing the spring to return to its natural state. This activates the lower limit limit switch, stopping the rope unwinding action. The rope unwinding action can be controlled by only one lower limit device, which is simple in structure and saves resources. Furthermore, since each drum is driven by a corresponding drum drive motor, it can realize the operation of a single drum or both drums. The structure is simple and cost-effective.

[0006] Furthermore, there are two or more wall frames, including wall frame one and wall frame two. Wall frame one and wall frame two are respectively located at both ends of the drum. Wall frame one and wall frame two are arranged in parallel. The drum drive motor is installed on wall frame two at the end away from the rope head fixing device. A gearbox mounting plate is provided on wall frame two.

[0007] The above configuration allows the drum to rotate by driving the drum drive motor on the second wall frame; and by installing a gearbox mounting plate on the second wall frame, a gearbox can be installed on the gearbox mounting plate to reduce the rotation speed of the drum.

[0008] Furthermore, there are two or more supports, including support one and support two. Support one and support two are respectively arranged on both sides of the pressure roller, and support one and support two are arranged in parallel. Support one and support two are fixedly installed on the steel plate by bolts.

[0009] The above configuration, by mounting brackets on both sides of the pressure roller, allows for the installation of connecting spring devices and limit switches.

[0010] Furthermore, the pressure roller includes a pressure roller body and a pressure roller skin. Bearings are provided at both ends of the pressure roller body, and a rotating shaft passes through the interior of the pressure roller body through the bearings. Both ends of the rotating shaft are respectively connected to one end of the spring device. The pressure roller skin is fixed to the surface of the pressure roller body by screws. The pressure roller skin includes a pressure roller skin body, and inclined portions are provided on both sides of the pressure roller skin body. The cross-section of the pressure roller skin is circular, and the cross-section of the pressure roller body is circular. One end of the inclined portion is connected to the surface of the pressure roller body, and the other end of the inclined portion is connected to the surface of the pressure roller skin. The cross-sectional radius of the pressure roller skin body is larger than the cross-sectional radius of the pressure roller body.

[0011] The above configuration involves mounting bearings at both ends of the pressure roller body, allowing the rotating shaft to pass through the interior of the pressure roller body and thus enabling the pressure roller to rotate. The rotating shaft is connected to one end of a spring device, ensuring the pressure roller presses firmly against the drum surface when the wire rope is not wound around it. Inclined sections at both ends of the pressure roller body facilitate the wire rope's entry from both ends under the pressure roller during its ascent, lifting the roller and separating it from the drum. This prevents the wire rope from getting stuck on the roller's steps, thus improving operational efficiency.

[0012] Furthermore, there are two or more spring devices arranged parallel to both sides of the pressure roller. Each spring device includes a guide seat, a spacer, a support rod, a spring, and a support rod seat. The guide seat is fixed to the lower limit bracket by bolts. A through hole is provided at one end of the guide seat away from the lower limit bracket. The spacer is provided at both ends of the through hole on the guide seat. The support rod passes through the through hole on the guide seat. One end of the support rod is fixedly connected to the support rod seat, and the other end of the support rod is fixedly connected to one end of the lower limit limit switch through a steel plate. The spring is sleeved on the end of the support rod connected to the bearing end of the pressure roller. One end of the spring is connected to the guide seat, and the other end of the spring is connected to the support rod seat.

[0013] The above setup, by connecting the support rod to the support rod seat and installing a spring sleeve on the end of the support rod connected to the support rod seat, allows the pressure roller to reset when the drum is not wound with wire rope, so that the pressure roller presses tightly against the drum surface, recognizing that the wire rope has reached the lower limit position.

[0014] Furthermore, one end of the lower limit limit switch is connected to the support rod of the spring device via a steel plate, and the other end of the lower limit limit switch is fixed to the lower limit bracket by bolts.

[0015] The above settings, by connecting the lower limit travel switch to the support rod of the spring device, enable the signal that the wire rope has reached the lower limit position to be transmitted to the control system, thereby preventing the drum from lowering.

[0016] Furthermore, the strut support includes a first fixing plate and a second fixing plate, which are arranged vertically. The first fixing plate has a strut mounting hole corresponding to the position of the strut. One end of the strut is fixedly installed in the strut mounting hole, and the other end of the strut is provided with a limit bolt. The second fixing plate has a shaft mounting hole, and a limit post is provided on one side of the shaft mounting hole.

[0017] The above configuration, by fixing one end of the support rod to the support rod seat and then fixing one end of the rotating shaft to the support rod seat through a limiting post, prevents the rotating shaft from rotating. A bearing is installed between the rotating shaft and the pressure roller, allowing the pressure roller to rotate, thereby reducing friction between the drum and the pressure roller. In addition, when the pressure roller is lifted, the support rod seat is lifted, and then the support rod moves upward to contact the limit switch. The limiting bolt on the other end of the support rod prevents the support rod from disengaging from the guide seat when it moves downward, resulting in good structural stability.

[0018] Furthermore, when the left-hand drum rotates counterclockwise, the wire rope on the left-hand drum performs a lifting action, winding around the left-hand drum along the rope groove on the left-hand drum. When the left-hand drum rotates clockwise, the wire rope on the left-hand drum performs a lowering action, disengaging from the left-hand drum along the rope groove on the left-hand drum.

[0019] When the right-hand drum rotates clockwise, the wire rope on the right-hand drum lifts up and winds around the right-hand drum along the rope groove. When the right-hand drum rotates counterclockwise, the wire rope on the right-hand drum lowers down and disengages from the right-hand drum along the rope groove.

[0020] Furthermore, the rope end fixing device includes a fixing member, which has a rope groove that matches the wire rope and a countersunk hole that matches the end of the wire rope. The rope groove is located on the top of the fixing member, and the countersunk hole is located inside the fixing member. One end of the rope groove is connected to the countersunk hole and one side of the fixing member, and the other end of the rope groove is connected to the other side of the fixing member. The bottom of the fixing member is provided with a connecting surface.

[0021] The above setup, by providing a rope groove at the top of the fixing component that matches the rope, and a countersunk hole inside the fixing component that matches the rope end, with one end of the rope groove connected to the countersunk hole and the other end connected to the side, allows the wire rope to slide into the fixing component through the rope groove at the top during installation. Then, the rope end is inserted forward into the countersunk hole inside the fixing component, achieving rapid installation and fixing of the wire rope end. For rope disassembly, simply remove the rope end from the countersunk hole inside the fixing component and then remove the rope through the rope groove at the top of the fixing component. This enables rapid installation and disassembly of the rope, improving work efficiency.

[0022] Furthermore, the side surfaces on both sides of the top surface of the fastener are arc-shaped. A protrusion is provided on one side of the fastener. The countersunk hole is located inside the fastener on the side near the protrusion. A tapered hole is provided at the end of the countersunk hole near the protrusion. The diameter of the tapered hole is larger than the diameter of the countersunk hole. An inclined portion is provided on the other side of the fastener near the countersunk hole, corresponding to the protrusion. The inclined portion is positioned outward and upward relative to the axis of symmetry of the countersunk hole. A first inclined portion is also provided on the protrusion, which is positioned outward and upward relative to the axis of symmetry of the countersunk hole. The cross-section of the countersunk hole is arc-shaped. One end of the countersunk hole is connected to the end of the fastener near the protrusion, and the other end of the countersunk hole is connected to one end of the rope groove. The angle between the axis of symmetry of the countersunk hole and the axis of symmetry of the rope groove is 170°-175°.

[0023] The above design incorporates several features. First, the side surfaces of the fixing component are curved, facilitating welding between the bottom of the fixing component and the curved equipment. This also allows the wire rope to slide out of the rope groove and be wound. A protrusion on one side of the fixing component prevents the wire rope from being pulled out and smoothly entering other equipment for winding. A tapered hole further stabilizes the rope end. The inclined sections at both ends of the fixing component near the fixing hole guide the rope's movement as it enters other winding equipment after exiting the rope groove. The arc-shaped cross-section of the countersunk hole allows the rope to be accommodated within it, thus securing the rope end. The countersunk hole, located inside the fixing component and connected to the rope groove on the fixing component, allows for quick and easy installation and removal of the rope. Finally, a small angle is formed between the axis of symmetry of the countersunk hole and the axis of symmetry of the rope groove, restricting the rope's movement after it is placed in the countersunk hole and preventing it from being pulled out of the rope groove too quickly.

[0024] Furthermore, the cross-sectional shape of the rope groove is set to U-shape, one side of the opening of the rope groove is located on the upper end face of the fixing member, the opening size of the rope groove matches the diameter of the wire rope, and the height of the end of the rope groove connected to the countersunk hole from the bottom of the fixing member is higher than the height of the end of the rope groove away from the countersunk hole from the bottom of the fixing member.

[0025] The above configuration, by setting the cross-sectional shape of the rope groove to U-shape and connecting one side of the rope groove opening to the upper end face of the fixing member, facilitates the wire rope to slide into or out of the rope groove; the end of the rope groove connected to the countersunk hole is higher than the end of the rope groove away from the countersunk hole, which allows the wire rope to be tightened along the lower end of the rope groove, thereby improving the utilization rate of the wire rope. Attached Figure Description

[0026] Figure 1 This is a left-side view of the present invention.

[0027] Figure 2 This is a partial cross-sectional view of the present invention.

[0028] Figure 3 This is a right-side view of the present invention.

[0029] Figure 4 This is a front view of the rope end fixing device of the present invention.

[0030] Figure 5 This is a side view of the rope end fixing device of the present invention.

[0031] Figure 6 This is a top view of the rope end fixing device of the present invention.

[0032] Figure 7This is a schematic diagram showing the connection between the pressure roller and two drums of the present invention.

[0033] Figure 8 This is a schematic diagram showing the lower limit device of the present invention connected to the drum.

[0034] Figure 9 This is a side view of the lower limiting device of the present invention.

[0035] Figure 10 for Figure 8 Enlarged view of section B in the middle.

[0036] Reference numerals: 7. Wall frame one; 9. Rope end fixing device; 10. Upper limit device; 101. Upper limit limit switch; 102. First wire rope; 103. Counterweight; 11. Wall frame two; 12. Gearbox mounting plate; 13. Motor mounting foot; 15. Lower limit device; 21. Left-hand drum; 22. Right-hand drum; 27. Drum drive motor; 911. Fixing component; 912. Rope groove; 913. Countersunk hole; 914. Protrusion; 915. Upper end face; 9131. Conical hole; 9141. First inclined part ; 9142, Inclined section; 151, Lower limit bracket one; 152, Pressure roller skin; 153, Pressure roller body; 154, Rotating shaft; 155, Guide seat; 156, Spacer; 157, Support rod; 158, Steel plate; 159, Lower limit bracket two; 1510, Pad plate; 1511, Lower limit travel switch; 1512, Spring; 1513, Support rod seat; 1514, Inclined surface; 1515, Pressure roller body surface; 1516, Pressure roller skin surface; 15131, First fixing plate; 15132, Second fixing plate. Detailed Implementation

[0037] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation details.

[0038] like Figure 1-10 As shown, this embodiment of the invention provides a drum device, including a wall frame, two drums arranged in parallel, a rope end fixing device 9, two drum drive motors 27, and a lower limit device 15. There are two or more wall frames. In this embodiment, there are two wall frames, including a first wall frame 7 and a second wall frame 11. The first wall frame 7 and the second wall frame 11 are respectively arranged at both ends of the drums. The first wall frame 7 and the second wall frame 11 are arranged in parallel. The drum drive motors 27 are installed on the second wall frame 11 at the end away from the rope end fixing device 9. A gearbox mounting plate 12 is provided on the second wall frame 11.

[0039] In this embodiment, as Figure 1As shown, an upper limit device 10 is provided. The two ends of the upper limit device 10 are connected to a wall frame 7 and a wall frame 11, respectively. The upper limit device 10 includes an upper limit limit switch 101, a first wire rope 102, and a counterweight 103. The first wire rope 102 is connected to the upper limit limit switch 101, and when the first wire rope 102 is in a taut state, the upper limit limit switch 101 is in a non-operating state. The other end of the first wire rope 102 is connected to the counterweight 103. The wire rope on the drum passes through the counterweight 103 and is connected to the hook. When the hook rises to the upper limit device 10, the hook presses against the counterweight 103, thereby causing the first wire rope 102 connected to the upper limit limit switch 101 to be in a slack state. Thus, the upper limit limit switch 101 controls the lifting operation to stop the lifting operation. The control of the upper limit limit switch 101 to stop the lifting operation is existing technology and will not be described in detail here.

[0040] like Figure 4-6 As shown, the lower limit device 15 includes a pressure roller, a spring device, and a lower limit limit switch 1511. The lower limit bracket includes a lower limit bracket one 151 and a lower limit bracket two 159. The lower limit bracket one 151 and the lower limit bracket two 159 are respectively disposed on both sides of the pressure roller, and the lower limit bracket one 151 and the lower limit bracket two 159 are arranged parallel to each other. One end of the lower limit bracket one 151 and one end of the lower limit bracket two 159 are fixedly mounted on the steel plate 158 by bolts. The other end of the lower limit bracket 151 and the other end of the lower limit bracket 2 159 are fixedly installed on the pad 1510 by bolts. Two or more spring devices are provided, arranged parallel to both sides of the pressure roller. Each spring device includes a guide seat 155, a spacer 156, a support rod 157, a spring 1512, and a support rod seat 1513. The guide seat 155 is fixed to the lower limit bracket by bolts. A through hole is provided at the end of the guide seat 155 away from the lower limit bracket. The spacer 156 is... The support rod 157 is placed at both ends of the through hole on the guide seat 155. One end of the support rod 157 is fixedly connected to the support rod seat 1513, and the other end of the support rod 157 is fixedly connected to one end of the lower limit travel switch 1511 through the steel plate 158. The spring 1512 is sleeved on the end of the support rod 157 that is connected to the end of the pressure roller bearing. One end of the spring 1512 is connected to the guide seat 155, and the other end of the spring 1512 is connected to the support rod seat 1513. The rod base 1513 includes a first fixing plate 15131 and a second fixing plate 15132. The first fixing plate 15131 and the second fixing plate 15132 are arranged vertically. The first fixing plate 15131 is provided with a support rod mounting hole corresponding to the position of the support rod 157. One end of the support rod 157 is fixedly installed in the support rod mounting hole, and the other end of the support rod 157 is provided with a limit bolt. The second fixing plate 15132 is provided with a shaft mounting hole, and a limit post is provided on one side of the shaft mounting hole.

[0041] like Figure 4As shown, the lower limit limit switch 1511 is mounted on the lower limit bracket 159 on one side of the pressure roller. One end of the lower limit limit switch 1511 is connected to the support rod 157 of the spring device via a steel plate 158, and the other end of the lower limit limit switch 1511 is fixed to the lower limit bracket 159 by bolts. The spring device is movably positioned between the lower limit limit switch 1511 and both ends of the pressure roller. When the spring is in its natural state, the pressure roller is in contact with the drum, and the lower limit limit switch 1511 is activated. When the spring is compressed, one end of the lower limit limit switch 1511... The lower limit travel switch 1511, connected to the spring device, is not activated. The pressure roller includes a pressure roller body 153 and a pressure roller skin 152. Bearings are provided at both ends of the pressure roller body 153. A rotating shaft 154 passes through the interior of the pressure roller body 153 via the bearings. Both ends of the rotating shaft 154 are connected to one end of the spring device. The pressure roller skin 152 is fixed to the surface of the pressure roller body 153 by screws. The pressure roller skin 152 includes a pressure roller skin body, and second inclined portions are provided on both sides of the pressure roller skin body. The cross-section of the pressure roller skin 152 is circular, and the cross-section of the pressure roller body 153 is also circular. Figure 6 As shown, one end of the inclined surface 1514 of the second inclined portion is connected to the surface 1515 of the pressure roller body, and the other end of the inclined surface 1514 of the second inclined portion is connected to the surface 1516 of the pressure roller skin. The cross-sectional radius of the pressure roller skin body is larger than the cross-sectional radius of the pressure roller body.

[0042] like Figure 2-3 As shown, in this embodiment, the two drums are a left-hand drum 21 and a right-hand drum 22. The two ends of the drums are rotatably connected to wall frame 7 and wall frame 11, respectively. Two drum drive motors 27 are respectively mounted on wall frame 11 at one end of the drum, and the output end of the drive motor 27 is connected to one end of the drum. A gap is provided between the two drums, and a pressure roller is placed in the gap between the drums. The two drums are symmetrically arranged relative to the pressure roller, and the pressure roller is connected to each of the two drums. When the left-hand drum 21 rotates counterclockwise, the wire rope on the left-hand drum 21 is lifted. The wire rope is wound around the left-hand drum 21 along the rope groove. When the left-hand drum 21 rotates clockwise, the wire rope on the left-hand drum 21 is lowered and disengaged from the left-hand drum 21 along the rope groove. When the right-hand drum 22 rotates clockwise, the wire rope on the right-hand drum 22 is raised and wound around the right-hand drum 22 along the rope groove. When the right-hand drum 22 rotates counterclockwise, the wire rope on the right-hand drum 22 is lowered and disengaged from the right-hand drum 22 along the rope groove.

[0043] like Figure 3 As shown, the lower limit bracket is fixedly connected to the upper end of the wall frame, and the rope end fixing device 9 is set at one end of the drum, as shown. Figure 7-9As shown, the rope end fixing device 9 includes a fixing member 911. The fixing member 911 is provided with a rope groove 912 that matches the wire rope and a countersunk hole 913 that matches the end of the wire rope. The sides of the top surface of the fixing member 911 are arc-shaped. A protrusion 914 is provided on one side of the fixing member 911. The countersunk hole 913 is located inside the fixing member 911 near the protrusion 914. A tapered hole 9131 is provided at the end of the countersunk hole 913 near the protrusion 914. The diameter of hole 9131 is larger than that of countersunk hole 913. An inclined portion 9142 is provided on the side of fastener 911 closest to countersunk hole 913 and on the other side corresponding to protrusion 914. The inclined portion 9142 is positioned outward and upward relative to the axis of symmetry of countersunk hole 913. A first inclined portion 9141 is also provided on protrusion 9144, also positioned outward and upward relative to the axis of symmetry of countersunk hole 913. The cross-section of countersunk hole 913 is arc-shaped, and one end of countersunk hole 913 is connected to the fastener... One end of the fixing member 911 near the protrusion 914 is connected, and the other end of the countersunk hole 913 is connected to one end of the rope groove 912. The angle between the axis of symmetry of the countersunk hole 913 and the axis of symmetry of the rope groove 912 is 170°-175°. The rope groove 912 is located at the top of the fixing member 911, and the countersunk hole 913 is located inside the fixing member 911. The cross-sectional shape of the rope groove 912 is U-shaped, and the opening side of the rope groove 912 is located on the upper end face 915 of the fixing member 911. The opening size of 912 matches the diameter of the wire rope. The height of the end of the rope groove 912 connected to the countersunk hole 913 from the bottom of the fixing member 911 is higher than the height of the end of the rope groove 912 away from the countersunk hole 913 from the bottom of the fixing member 911. One end of the rope groove 912 is connected to the countersunk hole 913 and one side of the fixing member 911. The other end of the rope groove 912 is connected to the other side of the fixing member 911. The bottom of the fixing member 911 is provided with a connecting surface, which facilitates welding connection to the drum.

[0044] In this embodiment, when installing the wire rope end on the rope end fixing device 9, the wire rope is first placed in the rope groove 912 through the opening of the rope groove 912, and then the wire rope is slid into the rope end fixing device 9 along the rope groove 912. Next, the wire rope end is pushed forward and inward into the countersunk hole 913 inside the rope end fixing device 9 to be locked, thereby quickly installing and fixing the wire rope end. When removing the wire rope end from the rope end fixing device 9, the wire rope end is pulled out of the countersunk hole 913 inside the rope end fixing device 9, and the wire rope is slid out along the rope groove 912 at the top of the rope end fixing device 9. Then, the wire rope is taken out through the opening of the rope groove 912, thereby quickly removing the wire rope end.

Claims

1. A reel device, comprising a wall frame, characterized in that: It also includes two parallel-arranged drums, a rope end fixing device, two drum drive motors, and a lower limit device. The lower limit device comprises a pressure roller, a spring device, and a lower limit travel switch. Lower limit brackets are mounted on both sides of the pressure roller, and the spring device is located on both sides of the pressure roller. One end of the spring device is connected to the lower limit bracket, and the other end is connected to one end of the pressure roller. The lower limit bracket is connected to both ends of the pressure roller via the spring device. The lower limit travel switch is located on the lower limit bracket on one side of the pressure roller. The spring device is movable between the lower limit travel switch and both ends of the pressure roller. The spring device includes a spring; when the spring is in its natural state, the pressure roller is in contact with the drum. When the lower limit limit switch is working, and the spring is compressed, one end of the limit switch is connected to the spring device, triggering the lower limit limit switch to stop working. The pressure roller has inclined parts on both sides that are inclined upward and inward. The wall frame is set at both ends of the drum. The two ends of the drum are rotatably connected to the wall frame. The drum drive motor is set on the wall frame at one end of the drum, and the output end of the drum drive motor is connected to one end of the drum. There is a gap between the two drums. The pressure roller is set in the gap between the drums, and the two drums are symmetrically arranged with respect to the pressure roller. The pressure roller is connected to the two drums respectively. The lower limit bracket is fixedly connected to the upper end of the wall frame. The rope end fixing device is set at one end of the drum. There are two or more spring devices arranged in parallel on both sides of the pressure roller. Each spring device includes a guide seat, a spacer, a support rod, a spring, and a support rod seat. The guide seat is fixed to the lower limit bracket by bolts. A through hole is provided at one end of the guide seat away from the lower limit bracket. The spacer is provided at both ends of the through hole on the guide seat. The support rod passes through the through hole on the guide seat. One end of the support rod is fixedly connected to the support rod seat. The other end of the support rod is fixedly connected to one end of the lower limit limit switch through a steel plate. The spring is sleeved on the end of the support rod connected to the bearing end of the pressure roller. One end of the spring is connected to the guide seat, and the other end of the spring is connected to the support rod seat. The rope end fixing device includes a fixing member, which has a rope groove that matches the wire rope and a countersunk hole that matches the end of the wire rope. The rope groove is located on the top of the fixing member, and the countersunk hole is located inside the fixing member. One end of the rope groove is connected to the countersunk hole and one side of the fixing member, and the other end of the rope groove is connected to the other side of the fixing member. The bottom of the fixing member has a connecting surface.

2. The winding device according to claim 1, characterized in that: There are two or more wall frames, including wall frame one and wall frame two. Wall frame one and wall frame two are respectively located at both ends of the drum. Wall frame one and wall frame two are arranged in parallel. The drum drive motor is installed on wall frame two at the end away from the rope head fixing device. A gearbox mounting plate is provided on wall frame two.

3. The winding device according to claim 1, characterized in that: There are two or more lower limit brackets, including bracket one and bracket two. Bracket one and bracket two are respectively arranged on both sides of the pressure roller, and bracket one and bracket two are arranged in parallel. Bracket one and bracket two are fixedly installed on the steel plate by bolts.

4. The winding device according to claim 1, characterized in that: The pressure roller includes a pressure roller body and a pressure roller skin. Bearings are provided at both ends of the pressure roller body. A rotating shaft passes through the interior of the pressure roller body through the bearings. Both ends of the rotating shaft are respectively connected to one end of the spring device. The pressure roller skin is fixed to the surface of the pressure roller body by screws. The pressure roller skin includes a pressure roller skin body. Inclined portions are provided on both sides of the pressure roller skin body body. The cross-section of the pressure roller skin is circular. The cross-section of the pressure roller body is circular. One end of the inclined portion is connected to the surface of the pressure roller body. The other end of the inclined portion is connected to the surface of the pressure roller skin. The cross-sectional radius of the pressure roller skin body body is larger than the cross-sectional radius of the pressure roller body body.

5. A winding device according to claim 1, characterized in that: One end of the lower limit limit switch is connected to the support rod of the spring device via a steel plate, and the other end of the lower limit limit switch is fixed to the lower limit bracket by bolts.

6. A winding device according to claim 1, characterized in that: The strut support includes a first fixing plate and a second fixing plate, which are arranged vertically. The first fixing plate has a strut mounting hole corresponding to the position of the strut. One end of the strut is fixedly installed in the strut mounting hole, and the other end of the strut is provided with a limit bolt. The second fixing plate has a shaft mounting hole, and a limit post is provided on one side of the shaft mounting hole.

7. A winding device according to claim 1, characterized in that: The top surface of the fastener has two curved sides. A protrusion is provided on one side of the fastener. The countersunk hole is located inside the fastener on the side near the protrusion. The end of the countersunk hole near the protrusion has a tapered hole with a larger diameter than the countersunk hole. An inclined portion is provided on the other side of the fastener near the countersunk hole, corresponding to the protrusion. The inclined portion is positioned outward and upward relative to the axis of symmetry of the countersunk hole. A first inclined portion is also provided on the protrusion, which is also positioned outward and upward relative to the axis of symmetry of the countersunk hole. The cross-section of the countersunk hole is arc-shaped. One end of the countersunk hole is connected to the end of the fastener near the protrusion, and the other end of the countersunk hole is connected to one end of the rope groove. The angle between the axis of symmetry of the countersunk hole and the axis of symmetry of the rope groove is 170°-175°.

8. A winding device according to claim 1, characterized in that: The cross-sectional shape of the rope groove is U-shaped, and one side of the opening of the rope groove is located on the upper end face of the fixing member. The opening size of the rope groove matches the diameter of the wire rope. The height of the end of the rope groove connected to the countersunk hole from the bottom of the fixing member is higher than the height of the end of the rope groove away from the countersunk hole from the bottom of the fixing member.

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