A dual roller device

Abstract

The application provides a double-drum device, which comprises a wall frame, a walking device, two parallelly arranged winding drums, a rope head fixing device, two winding drum driving motors and a lower limiting device, one end of the walking device is fixedly connected with the wall frame, the walking device is used for driving the wall frame to move on the rack of the crane jib and the guide rail, the walking device comprises a walking support, a pulley device, a walking driving motor, a driving shaft and a pin shaft device, the pulley device comprises a walking pulley device and a lateral pulley device; in the working process, the double-drum device can ascend, descend or horizontally move the goods, and has high efficiency and stability.

Description

Technical Field

[0001] This invention relates to the field of crane lifting equipment technology, specifically to a double-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 lift with a single drum, thus increasing operating costs and wasting energy. In addition, this device cannot achieve horizontal movement at high altitudes. Summary of the Invention

[0003] The purpose of this invention is to provide a double roller device that can raise, lower, or move goods during operation, with high efficiency and stability.

[0004] To achieve the above objectives, a double-drum device includes a wall frame, a traveling device, two parallel drums, a rope end fixing device, two drum drive motors, and a lower limit device. One end of the traveling device is fixedly connected to the wall frame. The traveling device is used to drive the wall frame to move on a rack and pinion on the crane boom and on a guide rail. The traveling device includes a traveling support, a pulley device, a traveling drive motor, a drive shaft, and a pin assembly. The pulley device includes a traveling pulley device and a lateral pulley device. The traveling pulley device is mounted on the traveling support, and the lateral pulley device is mounted on the traveling support. At one end of the pulley device away from the traveling bracket, the fixed end of the traveling drive motor is located on one side of the pin device. The output shaft of the traveling drive motor is fixedly connected to one end of the drive shaft. A gear that travels on a rack is provided on the drive shaft. The other end of the drive shaft is rotatably connected to a bearing. The pin device is fixedly connected to the wall frame. The lower limit device includes a pressure roller, a spring device, and a lower limit travel switch. The lower limit bracket is installed on both sides of the pressure roller. 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. The frame is connected, with one end of the spring device 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 mounted on the lower limit bracket on one side of the pressure roller. The spring device is movably mounted 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, and the lower limit travel switch is activated. When the spring is compressed, one end of the travel switch is connected to the spring device, triggering the lower limit travel switch to deactivate. The pressure roller has guide rails on both sides. The inclined portion is inclined 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. A gap is set between the two drums. The pressure roller is set in the gap between the drums. 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.

[0005] The above configuration involves a traveling device fixedly connected to the wall frame via a pin mechanism. A pulley system is mounted on a guide rail for positioning the traveling device. A traveling drive motor rotates the drive shaft, and the gear on the drive shaft moves along a rack. When the rack and guide rail are mounted on the crane boom, the double-drum device can move along the crane boom's guide rail. This configuration offers good stability and ease of operation, eliminating the need for manual position adjustments. Two drums are arranged side-by-side on the wall frame, allowing two steel wire ropes to be wound onto them. This design prevents the safety issue caused by a broken single wire rope. A pressure roller contacts both drums, and a corresponding drum drive motor is mounted on the wall frame at one end of each drum. The machine is driven by a drum drive motor, which in turn drives the drum to rotate. By installing a pressure roller device in the gap between the drums, the wire rope can be lowered or raised stably and orderly, avoiding the phenomenon of rope tangling between the drums. In addition, by pressing the two drums together with one pressure roller, during the rope release 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, and the lower limit limit switch is activated, stopping the rope release action. The rope release action can be controlled by only one lower limit device, which is simple in structure and saves resources. In addition, since each drum is driven by a corresponding drum drive motor, it can realize the operation of a single drum or two drums, which is simple in structure and saves costs.

[0006] Furthermore, there are two or more traveling supports, including traveling support one and traveling support two, which are respectively mounted on the pulley device and are arranged in parallel; there are two or more wall frames, including wall frame one and wall frame two, which are respectively mounted at both ends of the drum and are arranged in parallel; the drum drive motor is mounted on wall frame two at the end away from the rope head fixing device, and a gearbox mounting plate is provided on wall frame two.

[0007] The above configuration, by setting the first and second traveling supports in parallel, allows the pulley device to be mounted on the traveling supports, thereby enabling the pulley device to move horizontally on the guide rail; by mounting the motor on the second wall frame, the drum can be driven to rotate by the drum drive motor; by setting a gearbox mounting plate on the second wall frame, a gearbox can be mounted on the gearbox mounting plate, thereby slowing down the rotation of the drum.

[0008] Furthermore, the pin device includes two connecting vertical plates on the walking bracket, a connecting plate on the wall frame, a fixing plate located on one side of the connecting vertical plates, and a pin. The connecting vertical plates and the connecting plates are provided with connecting holes corresponding to the pin. The connecting plates are arranged between the connecting vertical plates and the pin passes through the connecting holes of the connecting vertical plates and the connecting plates. The pin is provided with a notch on one side of the connecting vertical plate, and a fixing plate is fixedly connected in the notch.

[0009] The above setup involves inserting a connecting plate between two connecting vertical plates, then connecting them via a pin, and finally securing them with a fixing plate. This facilitates operation and allows for easy disassembly of the connection between the traveling bracket and the wall frame while ensuring the reliability of the connection.

[0010] Furthermore, there are two or more lower limit brackets, including lower limit bracket one and lower limit bracket two. Lower limit bracket one and lower limit bracket two are respectively arranged on both sides of the pressure roller, and lower limit bracket one and lower limit bracket two are arranged in parallel. Lower limit bracket one and lower limit bracket two are fixedly installed on the steel plate by bolts.

[0011] The above configuration, by mounting brackets on both sides of the pressure roller, allows for the installation of connecting spring devices and limit switches.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

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

[0017] The above setup, by connecting the lower limit travel switch to the support rod of the spring device, allows the signal of the wire rope reaching the lower limit position to be transmitted to the control system, thereby preventing the drum from lowering. By fixing one end of the support rod to the support rod seat and then fixing one end of the shaft to the support rod seat through the limit post, the shaft will not rotate. A bearing is installed between the shaft and the pressure roller, allowing the pressure roller to rotate, thus 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 travel switch. The limit 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, 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.

[0019] 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.

[0020] 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°.

[0021] 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.

[0022] 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.

[0023] 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

[0024] Figure 1 This is a left-side view of the present invention.

[0025] Figure 2 This is the front view of the present invention.

[0026] Figure 3 This is a right-side view of the present invention.

[0027] Figure 4 This is a front view of the lower limit device of the present invention connected to a portion of the reel.

[0028] Figure 5 This is a side view of the lower limiting device of the present invention.

[0029] Figure 6 for Figure 4 Enlarged view of section B in the middle.

[0030] Figure 7 This is a front view of the rope end fixing device of the present invention.

[0031] Figure 8 This is a side view of the rope end fixing device of the present invention.

[0032] Figure 9 This is a top view of the rope end fixing device of the present invention.

[0033] Figure label:

[0034] 1. Guide rail; 2. Lateral pulley device; 3. Traveling bracket one; 4. Pin device; 6. Traveling drive motor; 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; 16. Drive shaft; 17. Traveling bracket two; 18. Traveling pulley device; 19. Bearing; 20. Motor bracket; 21. Left-hand drum; 22. Right-hand drum; 25. Rack; 26. Gear; 27. Drum drive motor; 411. Connecting vertical plate; 412. Connecting plate; 413. Fixing plate; 414. Pin; 4 15. Notch; 911. Fixing element; 912. Rope groove; 913. Countersunk hole; 914. Protrusion; 915. Upper end face; 9131. Tapered hole; 9141. First inclined part; 9142. Inclined part; 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

[0035] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation details.

[0036] like Figure 1-9As shown, this embodiment of the invention provides a double-roller device, including a wall frame, a traveling device, two parallel-arranged drums, 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 wall frame one 7 and wall frame two 11, which are respectively located at both ends of the drums and are arranged in parallel. The drum drive motors 27 are mounted on wall frame two 11 at the end furthest from the rope end fixing device 9. A gearbox mounting plate 12 is provided on wall frame two 11. In this embodiment, the two drums are a left-handed drum 21 and a right-handed drum 22. The traveling device includes a traveling bracket, a pulley device, a traveling drive motor 6, and a pin device 4. There are two or more traveling brackets, including traveling bracket one 3 and traveling bracket two 17. The first frame 3 and the second walking frame 17 are respectively equipped with walking pulley devices 18, and the first walking frame 3 and the second walking frame 17 are arranged in parallel. The pulley device includes a walking pulley device 18 and a side pulley device 2. The walking pulley device 18 is set on the walking frame, and the side pulley device 2 is set on the end of the walking pulley device 18 away from the walking frame. One end of the walking drive motor 6 is installed on the outside of a pin shaft device 4, and the other end of the walking drive motor 6 is installed on a motor bracket 20, wherein the motor bracket 20 is fixed on the wall frame. The output shaft end of the walking drive motor 6 is connected to one end of the drive shaft 16. The drive shaft 16 is equipped with a gear 26 that travels on a rack 25. The other end of the drive shaft 16 is rotatably connected to a bearing 19. The bearing 19 is set on the upper end of the pin shaft device 4, and the pin shaft device 4 is fixedly connected to the wall frame through pins.

[0037] like Figure 2 and 3 As shown, in this embodiment, there are two pin devices 4, which are respectively set at both ends of the walking bracket. Each pin device 4 includes two connecting vertical plates 411 set on the walking bracket, a connecting plate 412 set on the wall frame, a fixing plate 413 located on one side of the connecting vertical plate 411, and a pin 414. The connecting vertical plate and the connecting plate are provided with connecting holes corresponding to the pin. The connecting plate is set between the connecting vertical plates and the pin passes through the connecting holes of the connecting vertical plate and the connecting plate. The pin is provided with a notch 415 on one side of the connecting vertical plate, and the fixing plate 414 is fixedly connected in the notch.

[0038] When it is necessary to fix the traveling bracket to the wall frame, the connecting plate is inserted between the two connecting vertical plates, and then the connection is achieved by the pin. In addition, it is fixed by the fixing plate, which makes it easy to disassemble the connection between the traveling bracket and the wall frame while ensuring the reliability of the connection.

[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, the drum includes 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 ends of the drive motors 27 are 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 performs a lifting action. The wire rope on the left-hand drum 21 is wound around the left-hand drum 21. 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 through 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 through 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 through 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 double-roller device, characterized in that: The system includes a wall frame, a traveling device, two parallel drums, a rope end fixing device, two drum drive motors, and a lower limit device. One end of the traveling device is fixedly connected to the wall frame. The traveling device is used to move the wall frame on the rack and guide rails of the crane boom. The traveling device includes a traveling bracket, a pulley device, a traveling drive motor, a drive shaft, and a pin shaft device. The pulley device includes a traveling pulley device and a lateral pulley device. The traveling pulley device is mounted on the traveling bracket, and the lateral pulley device is located at the end of the traveling pulley device away from the traveling bracket. The fixed end of the traveling drive motor is located on one side of the pin shaft device. The output shaft end of the traveling drive motor is fixedly connected to one end of the drive shaft. The drive shaft is equipped with a gear that travels on the rack. The other end of the drive shaft is rotatably connected to a bearing. The pin shaft device is fixedly connected to the wall frame. The lower limit device includes a pressure roller, a spring device, and a lower limit travel switch. The lower limit bracket is installed 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. The other end of the spring device 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 mounted on the lower limit bracket on one side of the pressure roller. The spring device is movably mounted 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, and the lower limit travel switch is activated. When the spring is compressed, one end of the travel switch is connected to the spring device, triggering the lower limit travel switch to deactivate. The two sides of the pressure roller are provided with upward and inward tilting... The inclined section is set at an angle. 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. A gap is set between the two drums. The pressure roller is set in the gap between the drums. 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 traveling supports, including traveling support one and traveling support two. Traveling support one and traveling support two are respectively mounted on the pulley device and are arranged in parallel. There are two or more wall frames, including wall frame one and wall frame two. Wall frame one and wall frame two are respectively mounted at both ends of the drum and are arranged in parallel. The drum drive motor is mounted on wall frame two at the end away from the rope head fixing device. A gearbox mounting plate is provided on wall frame two. The pin device includes two connecting vertical plates on the walking bracket, a connecting plate on the wall frame, a fixing plate located on one side of the connecting vertical plates, and a pin. The connecting vertical plates and the connecting plates are provided with connecting holes corresponding to the pin. The connecting plates are arranged between the connecting vertical plates and the pin passes through the connecting holes of the connecting vertical plates and the connecting plates. The pin is provided with a notch on one side of the connecting vertical plate, and a fixing plate is fixedly connected in the notch.

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

3. The double-roller 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.

4. A double-roller device according to claim 3, characterized in that: 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.

5. A double-roller device according to claim 4, characterized in that: One end of the lower limit limit switch is connected to the support rod of the spring device through a steel plate, and the other end of the lower limit limit switch is fixed to the lower limit bracket by bolts; the support rod seat includes a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are arranged vertically, the first fixing plate is provided with a support rod mounting hole at the position corresponding to the support rod, one end of the support rod is fixedly installed in the support rod mounting hole, and the other end of the support rod is provided with a limit bolt, the second fixing plate is provided with a rotating shaft mounting hole, and a limit post is provided on one side of the rotating shaft mounting hole.

6. A double-roller device according to claim 1, characterized in that: 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.

7. A double-roller device according to claim 6, 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 double-roller device according to claim 6, 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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