A rotary base shovel tail cable reel

Abstract

The utility model relates to the technical field of open pit mine machinery, especially relates to a rotary chassis type cable retractor of electric shovel tail, including electric drive type rotary track chassis, electric drive type rotary track chassis is used for driving this device to remove, and the rotary device is arranged on the central position of electric drive type rotary track chassis, and the rotary device is provided with the mounting platform, and the both ends of mounting platform are provided with first cable retractor, second cable retractor, and the control machine room is arranged in the middle part of mounting platform, and the rotary device can drive mounting platform to occur circumferential rotation, and first cable retractor, second cable retractor are used for the laying and recovery of cable, and the retractor shield is sleeved on first cable retractor, second cable retractor, and the guardrail is arranged on the both sides of mounting platform to guarantee the safety when personnel overhauls the machine table.

Description

Technical Field

[0001] This utility model relates to the field of open-pit mining machinery technology, and in particular to a rotary chassis type electric shovel tail cable retraction vehicle. Background Technology

[0002] Currently, traditional electric shovel tail cable reel trucks on the market have a fixed body and chassis structure. During the relocation of electric shovels, the overall movement of the body and tracked chassis of traditional electric shovel tail cable reel trucks when following at a fixed distance often causes large angles between the cable and the cable reel, resulting in excessive bending of the cable. This causes uneven stress on the cable, leading to cable wear, affecting the cable's service life, and in severe cases, may lead to major safety accidents, resulting in significant personal and property losses. This seriously affects the production efficiency of electric shovels and the personal safety of workers, causing huge losses to production. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide an electric shovel tail cable retraction vehicle with a rotatable body, compact layout, convenient operation and optimized structure.

[0004] The technical solution adopted by this utility model is:

[0005] A rotary chassis type electric shovel tail cable retraction vehicle includes an electric drive rotary tracked chassis, a rotary device, an installation platform, a first cable retraction device, a second cable retraction device, and a control room. The rotary device is located at the center of the electric drive rotary tracked chassis, and the installation platform is mounted on it. The first and second cable retraction devices are located at both ends of the installation platform, and the control room is located in the middle of the installation platform. The rotary device includes a rotating component, a rotating fixed plate, a rotary reducer, and gears. The rotating component includes an inner ring and an outer ring, with balls disposed between the inner and outer rings. The inner ring has teeth, and the rotating fixed plate is fixedly mounted on the outer ring. The rotating fixed plate has a central section... The rotary reducer is fixedly mounted on a rotating plate with a through-hole design. A gear is mounted on the output shaft of the rotary reducer, and the gear meshes with teeth on the inner ring of the rotating component. The first cable winding and unwinding device includes a base support, a cable reel, and a cable routing device. The cable reel and cable routing device are arranged side-by-side on the base support. The cable routing device includes a screw drive component and a cable guide device, with the cable guide device mounted on the screw drive component. The cable guide device includes a housing with a through-channel. A cable guide component is located at one end of the channel, and a cable drive component is located at the other end, positioned at the cable reel.

[0006] The cable guiding component includes a first roller and a second roller. Two sets of first rollers are vertically arranged at the port of the housing. The second roller is arranged horizontally at the bottom of the first roller. The cable transmission component includes a geared motor, which is fixedly arranged on the side wall of the housing. The output shaft of the geared motor is provided with a drive shaft, and a drive wheel is provided on the drive shaft. A driven shaft is arranged side by side above the drive shaft, and a driven wheel of the guiding device is provided on the driven shaft. The drive wheel and the driven wheel of the guiding device are matched in position. Grooves are provided on the drive wheel and the driven wheel of the guiding device, and the cable passes through the grooves.

[0007] A cable tension detection component is also matched at the cable guiding component. The cable tension detection component includes a rotating plate, a second roller, and an angular displacement sensor. There are two sets of rotating plates, which are respectively set on both sides of the housing. A rotating shaft is set on the top of the housing. One end of the rotating plate is hinged to the rotating shaft on the top of the housing. The other end of the rotating plate is set with a second roller. An angular displacement sensor is also set on the rotating shaft on the top of the housing.

[0008] The first cable winding and unwinding device and the second cable winding and unwinding device are equipped with winding and unwinding device covers. The winding and unwinding device covers include movable cover plates, which are mounted on the cable reel and hinged to the winding and unwinding device covers. Electric push rods are provided on both sides of the winding and unwinding device covers. The output shaft of the electric push rod is provided with a first hinge shaft, and the tail end of the cylinder is provided with a second hinge shaft. The first hinge shaft is mounted on the movable cover plate, and the second hinge shaft is mounted on the winding and unwinding device covers.

[0009] The movable cover is equipped with a support bar at the end near the control room, and the support bar is fixedly installed on the side wall of the control room.

[0010] The drive-type rotary tracked chassis includes a driven wheel, on which a tensioning device is matched. The tensioning device includes a support, which is fixedly mounted on the frame. A first vertical plate and a second vertical plate are respectively provided at both ends of the support. A hydraulic cylinder is mounted on the support. The tail end of the hydraulic cylinder is fixedly mounted on the first vertical plate. The cylinder barrel of the hydraulic cylinder passes through the second vertical plate. The output shaft of the hydraulic cylinder faces the driven wheel. A top cover is provided at the output shaft end of the hydraulic cylinder, and the top cover is connected to the driven wheel.

[0011] The hydraulic cylinder is provided with a guide shaft in the circumference. The guide shaft passes through the second vertical plate. One end of the guide shaft is fixedly connected to the top cover. The second vertical plate is also provided with a linear bearing. The guide shaft passes through the linear bearing. A set of springs is sleeved on the guide shafts on both sides of the second vertical plate.

[0012] The drive-type rotary track chassis includes a frame, which is an H-type frame.

[0013] The mounting platform is designed with knurled patterns for slip resistance.

[0014] Guardrails are installed on both sides of the installation platform.

[0015] The beneficial effects of this utility model are:

[0016] A rotary chassis type electric shovel tail cable retraction vehicle specifically includes: an electric drive rotary track chassis, a rotary device, an installation platform, a first cable retraction device, a second cable retraction device, and a control room. The electric-driven rotary tracked chassis provides the driving force for the cable winding and unwinding equipment. A rotary device is installed at the center of the chassis, driving the entire vehicle body to rotate via a servo reducer. The angle can be adjusted in real time during electric shovel operation and site relocation to prevent excessive cable bending and wear. An installation platform is mounted on the rotary device, with a first cable winding and unwinding device 4 and a second cable winding and unwinding device 8 symmetrically positioned at both ends. Cables are laid and retrieved through the cable winding and unwinding devices. These devices also include a cable routing device, which orderly winds the cable onto the cable reel, preventing tangling. The automatic cable routing device can be adjusted to synchronize the routing based on the cable diameter parameters of different cable specifications. The cable winding and unwinding devices also include a cable guide device equipped with an angular displacement sensor. The sensor's detection data controls the cable tension, enabling automatic cable winding and unwinding. This system meets the operational requirements of various work scenarios, significantly improving the efficiency of cable laying and retrieval. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure;

[0018] Figure 2 This is a schematic diagram of an electrically driven rotary tracked chassis and cable car platform.

[0019] Figure 3 This is a schematic diagram of the rotary device structure;

[0020] Figure 4 This is a schematic diagram of the rotating component structure;

[0021] Figure 5 This is a schematic diagram of the first cable take-up and unwinding device;

[0022] Figure 6 Schematic diagram of cable guiding device structure Figure 1 ;

[0023] Figure 7 Schematic diagram of cable guiding device structure Figure 2 ;

[0024] Figure 8 This is a schematic diagram of the cable guiding device when the cable is under tension.

[0025] Figure 9 A schematic diagram of the cable guiding device when the cable is in the relaxed state;

[0026] Figure 10 This is a schematic diagram of the tensioning device structure;

[0027] Figure 11 This is a schematic diagram of the protective cover structure for the deployment and retraction device.

[0028] In the diagram: 1-Electric drive rotary tracked chassis, 101-Support roller, 102-Drag chain roller, 103-Drive wheel, 104-Driven wheel, 105-Track, 106-Tensioning device, 1061-Support, 10611-First vertical plate, 10612-Second vertical plate, 1062-Hydraulic cylinder, 1063-Guide shaft, 1064-Spring, 1065-Linear bearing, 1066-Top cover, 107-Frame, 2-Slewing device, 201-Rotating component, 2011-Inner ring, 2012-Outer ring, 2013-Ball bearing, 2014-Seal, 202-Rotating fixing plate, 203-Rotary reducer, 204-Gear, 3-Mounting platform, 4-First cable retraction device, 401-Base bracket, 402-Electric... Cable reel, 403-reel drive reducer, 404-mounting support plate, 405-trapezoidal lead screw, 406-guide rod, 407-planetary reducer, 409-cable guide device, 4091-housing, 4092-first roller, 4093-rotating plate, 4094-second roller, 4095-angular displacement sensor, 4096-third roller, 4097-geared motor, 4098-drive shaft, 4099-driven shaft, 40910-drive wheel, 40911-guide device driven wheel, 5-control room, 6-rewinding device cover, 601-movable cover plate, 602-electric push rod, 603-first hinge shaft, 604-second hinge shaft, 605-support bar, 7-guardrail, 8-second cable rewinding device. Detailed Implementation

[0029] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0030] It should be noted that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0031] like Figure 1 , Figure 2As shown, a rotary chassis type electric shovel tail cable retraction vehicle includes an electric drive rotary tracked chassis 1, a rotary device 2, an installation platform 3, a first cable retraction device 4, a second cable retraction device 8, and a control room 5. The electric drive rotary tracked chassis 1 is used to drive the movement of this device. The rotary device 2 is located at the center of the electric drive rotary tracked chassis 1, and the installation platform 3 is located on the rotary device 2. The first cable retraction device 4 and the second cable retraction device 8 are located at both ends of the installation platform 3. The control room 5 is located in the middle of the installation platform 3. The rotary device 2 can drive the installation platform 3 to rotate in a circular motion. The first cable retraction device 4 and the second cable retraction device 8 are used for cable laying and retrieval. The control room 5 integrates high-voltage and low-voltage electrical control cabinets, audible and visual alarms, and integrated circuits of control elements for various components, etc., for controlling the coordinated operation of various components. The specific layout and installation method is the electrical design scheme, which will not be described in detail here. The first cable winding device 4 and the second cable winding device 8 are equipped with winding device covers 6 to protect the first cable winding device 4 and the second cable winding device 8. The mounting platform 3 is provided with knurled patterns for anti-slip treatment. Guardrails 7 are provided on both sides of the mounting platform 3. The knurled patterns on the mounting platform 3 and the guardrails 7 are provided to ensure the safety of personnel when they go up to the machine for maintenance.

[0032] like Figure 2 , Figure 3 As shown, the electric drive rotary tracked chassis 1 includes track rollers 101, carrier rollers 102, drive wheels 103, driven wheels 104, tracks 105, and a frame 107. The frame 107 is an H-shaped frame. Several track rollers 101 are arranged below the long supports on both sides, and carrier rollers 102 are arranged above them. Drive wheels 103 and driven wheels 104 are arranged at both ends respectively. The drive wheels 103 are driven by a motor. The tracks 105 are connected end to end by connecting pins and are wrapped around the already installed drive wheels 103, driven wheels 104, track rollers 101, and carrier rollers 102.

[0033] To ensure more stable operation of the electric-driven rotary track chassis 1, a tensioning device 106 is installed on the driven wheel 104. The tensioning device 106 is used to adjust the tension according to the tightness of the track 105. Figure 10As shown, the tensioning device 106 includes a support 1061, a hydraulic cylinder 1062, a guide shaft 1063, a spring 1064, a linear bearing 1065, and a top cover 1066. The support 1061 is fixedly mounted on the frame 107. The hydraulic cylinder 1062 is mounted on the support 1061. A first vertical plate 10611 and a second vertical plate 10612 are respectively provided at both ends of the support 1061. The tail end of the hydraulic cylinder 1062 is fixedly mounted on the first vertical plate 10611. The cylinder barrel of the hydraulic cylinder 1062 passes through the second vertical plate 10612. The output shaft of the hydraulic cylinder 1062 faces... Driven wheel 104 and hydraulic cylinder 1062 have a top cover 1066 at the output shaft end. The top cover 1066 is connected to driven wheel 104. Hydraulic cylinder 1062 has a guide shaft 1063 circumferentially arranged. The guide shaft 1063 passes through the second vertical plate 10612. One end of the guide shaft 1063 is fixedly connected to the top cover 1066. The second vertical plate 10612 is also equipped with a linear bearing 1065. The guide shaft 1063 passes through the linear bearing 1065. A set of springs 1064 is sleeved on each of the guide shafts 1063 on both sides of the second vertical plate 10612 to play an elastic buffering role. When the track 105 is too loose, the output shaft of the hydraulic cylinder 1062 extends, and the top cover 1066 extends the driven wheel 104, increasing the distance between the drive wheel 103 and the driven wheel 104, so that the track 105 reaches a suitable tension; when the track 105 is too tight, the output shaft of the hydraulic cylinder 1062 retracts, and the top cover 1066 retracts the driven wheel 104, decreasing the distance between the drive wheel 103 and the driven wheel 104, so that the track 105 reaches a suitable tension.

[0034] like Figure 3 , Figure 4 As shown, a rotary device 2 is provided on the middle support of the frame 107. The rotary device 2 includes a rotating component 201, a rotating fixed plate 202, a rotary reducer 203, and a gear 204. The rotating component 201 includes an inner ring 2011, an outer ring 2012, a ball bearing 2013, and a seal 2014. The ball bearing 2013 is provided between the inner ring 2011 and the outer ring 2012, and the seal 2014 is also provided between the inner ring 2011 and the outer ring 2012. The inner ring 2011 is provided with teeth and is fixedly mounted on the frame 107. The rotating fixed plate 202 is fixedly mounted on the outer ring 2012. The rotating fixed plate 202 has a through-hole in the middle. The rotary reducer 203 is fixedly mounted on the rotating fixed plate 202. The gear 204 is provided on the output shaft of the rotary reducer 203. The gear 204 is matched and meshed with the teeth provided on the inner ring 2011.

[0035] like Figure 5As shown, the first cable winding and unwinding device 4 includes a base support 401, a cable drum 402, a drum drive reducer 403, and a cable laying device. The cable drum 402 and the cable laying device are arranged side by side on the base support 401. A rotating shaft is set on the central axis of the cable drum 402, and a drum drive reducer 403 is set on one end of the shaft. The drum drive reducer 403 drives the cable drum 402 to rotate. The cable laying device includes a screw drive component and a cable guide device 409. The screw drive component includes a mounting plate 404 and a ladder. Trapezoidal lead screw 405, guide rod 406, planetary reducer 407, and mounting plate 404 are symmetrically arranged at both ends of base bracket 401. Trapezoidal lead screw 405 is arranged between mounting plate 404. Planetary reducer 407 is installed on one shaft end of trapezoidal lead screw 405. Guide rod 406 is arranged on both sides of trapezoidal lead screw 405. The two shaft ends of guide rod 406 are fixedly mounted on mounting plate 404. Sliding seat is provided on trapezoidal lead screw 405. Sliding seat is sleeved on guide rod 406. Cable guide device 409 is fixedly installed on sliding seat.

[0036] like Figures 5-7 As shown, the cable guiding device 409 includes a housing 4091, which is fixedly mounted on the sliding seat of the trapezoidal lead screw 405. The housing 4091 has a through channel, with a cable guiding component at one end and a cable transmission component at the other end. The cable transmission component is located at the cable drum 402. The cable guiding component guides the cable, allowing it to be smoothly wound onto the cable drum 402. The cable transmission component provides auxiliary power to the cable drive, preventing excessive cable drag that could cause malfunction of the drum drive reducer 403. The cable guiding component includes a first roller 4092 and a second roller 4094. The two sets of first rollers 4092 are vertically arranged at one end of the housing 4091, and the distance between the two sets of first rollers 4092 is proportional to the cable length. With matching diameters, a second roller 4094 is laterally arranged at the bottom of the first roller 4092; the cable transmission component includes a geared motor 4097, a drive shaft 4098, a driven shaft 4099, a drive wheel 40910, and a guide device driven wheel 40911. The geared motor 4097 is fixedly mounted on the side wall of the housing 4091. The output shaft end of the geared motor 4097 is provided with the drive shaft 4098. The drive wheel 40910 is mounted on the drive shaft 4098. The driven shaft 4099 is arranged side by side above the drive shaft 4098. The guide device driven wheel 40911 is mounted on the driven shaft 4099. The drive wheel 40910 and the guide device driven wheel 40911 are positioned and matched. Grooves are provided on the drive wheel 40910 and the guide device driven wheel 40911 for threading cables.

[0037] like Figures 5-7As shown, a cable tension detection component is also provided at the cable guiding component. The cable tension detection component includes a rotating plate 4093, a second roller 4094, and an angular displacement sensor 4095. Two sets of rotating plates 4093 are provided, respectively located on both sides of the housing 4091. A rotating shaft is provided at the top of the housing 4091. One end of the rotating plate 4093 is hinged to the rotating shaft at the top of the housing 4091, and the other end of the rotating plate 4093 is provided with the second roller 4094. An angular displacement sensor 4095 is also provided on the rotating shaft at the top of the housing 4091. The angular displacement sensor 4095 is set with an angle range value and detects the rotation angle value of the rotating plate 4093. Figure 8 , 9 As shown, the cable passes under the second roller 4094, through two sets of first rollers 4092, the driving pulley 40910, and the driven pulley 40911 of the guide device, and then winds onto the cable reel 402. Figure 8 As shown, during cable laying, when the cable is too tight, it will cause the second roller 4094 to move upward, and the rotating plate 4093 to rotate clockwise. During this rotation, the angular displacement sensor 4095 will also rotate. When the maximum preset angle of the angular displacement sensor 4095 is reached, the sensor sends a signal to the control element in the control room 5. The control element then sends a feedback signal to accelerate the unwinding of the cable reel 402, preventing the cable from breaking due to excessive tightness. Figure 9 As shown, when the cable is too loose, the second roller 4094 moves downward and the rotating plate 4093 rotates counterclockwise. During the rotation, the angular displacement sensor 4095 will rotate. When the preset maximum angle of the angular displacement sensor 4095 is reached, the angular displacement sensor 4095 sends a signal to the control element in the control room 5. The control element sends a feedback signal to make the cable reel 402 properly wind up the cable to prevent the cable from being crushed during the operation of the equipment and causing cable damage.

[0038] The second cable winding and unwinding device 8 and the first cable winding and unwinding device 4 have a symmetrical structure and the same mechanism. They are only installed symmetrically, so their structure will not be described in detail here.

[0039] like Figure 11 As shown, a movable cover plate 601 is also provided on the take-up and release device cover 6. The movable cover plate 601 is set on the cable reel 402. One end of the movable cover plate 601 is hinged to the take-up and release device cover 6. Electric push rods 602 are provided on both sides of the take-up and release device cover 6. The output shaft end of the electric push rod 602 is provided with a first hinge shaft 603, and the tail end of the cylinder is provided with a second hinge shaft 604. The first hinge shaft 603 is set on the movable cover plate 601, and the second hinge shaft 604 is set on the take-up and release device cover 6. A support bar 605 is provided at the end of the movable cover plate 601 near the control room 5 to support the movable cover plate 601. The support bar 605 is fixedly set on the side wall of the control room 5.

[0040] Cable winding and unwinding process:

[0041] The cables of the substation are connected to the first cable winding device 4 and wound onto the cable reel 402. After the cables of the substation are connected to the cable reel 402, part of them can be connected to the vehicle for the vehicle's use through the distribution box, and the other part can be connected to the second cable winding device 8. The vehicle is connected to the electric shovel in front through another cable. Both cables are connected to the second cable winding device 8, thereby realizing the power supply to the electric shovel. When the electric shovel moves forward, the second cable reel-in / reel-out device 8 automatically releases the cable. At this time, the vehicle does not need to be started. When the electric field moves too far and reaches the set distance between the vehicle and the electric shovel, the vehicle starts automatically and moves with the electric shovel. After the vehicle moves forward, the first cable reel-in / reel-out device 4 releases the cable. When the electric shovel moves backward, the electric shovel reel-in / reel-out vehicle can retract the cable through the second cable reel-in / reel-out device 8 to avoid crushing the cable when the electric shovel moves backward, ensuring safe production. The vehicle can also move backward with the electric shovel. At this time, the first cable reel-in / reel-out device 4 of the vehicle retracts the cable on the rear side to prevent the cable from being crushed when the vehicle moves.

[0042] When the electric shovel undergoes a small positional change during operation, the cable between the shovel and this device is pulled at an angle. The slewing device 2 drives the installation platform 3 to rotate, adjusting the angle between the second cable reeling device 8 and the connection position of the electric shovel. This prevents excessive bending of the cable between the two, avoids cable wear, extends the cable's service life, and saves costs.

[0043] During the relocation of the electric shovel, this device follows the shovel. The slewing device 2 drives the installation platform 3 to rotate and adjust the angle in real time, always maintaining the angle between the cable reeling device and the cable at the tail of the electric shovel, which greatly improves the service life of the cable.

Claims

1. A rotary chassis type electric shovel tail cable retraction vehicle, comprising an electric drive rotary track chassis (1), a rotary device (2), an installation platform (3), a first cable retraction device (4), a second cable retraction device (8), and a control room (5), wherein the rotary device (2) is provided at the center of the electric drive rotary track chassis (1), and the installation platform (3) is provided on the installation platform (3), the first cable retraction device (4) and the second cable retraction device (8) are provided at both ends of the installation platform (3), and the control room (5) is provided in the middle of the installation platform (3), characterized in that: The rotary device (2) includes a rotating component (201), a rotating fixed plate (202), a rotary reducer (203), and a gear (204). The rotating component (201) includes an inner ring (2011) and an outer ring (2012). A ball bearing (2013) is provided between the inner ring (2011) and the outer ring (2012). The inner ring (2011) is provided with teeth. The rotating fixed plate (202) is fixedly provided on the outer ring (2012). The rotating fixed plate (202) is hollowed out in the middle. The rotary reducer (203) is fixedly provided on the rotating fixed plate (202). The gear (204) is provided on the output shaft of the rotary reducer (203). The gear (204) is matched and meshed with the teeth provided on the inner ring of the rotating component (201). The first cable winding and unwinding device (4) includes a base support (401), a cable reel (402), and a cable laying device. The cable reel (402) and the cable laying device are arranged side by side on the base support (401). The cable laying device includes a screw drive component and a cable guide device (409). The cable guide device (409) is arranged on the screw drive component. The cable guiding device (409) includes a housing (4091), which has a through channel. A cable guiding component is provided at one end of the channel, and a cable driving component is provided at the other end. The cable driving component is located at the cable reel (402).

2. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The cable guiding component includes a first roller (4092) and a second roller (4094). The two sets of first rollers (4092) are vertically arranged at the port of the housing (4091). The second roller (4094) is arranged horizontally at the bottom of the first roller (4092). The cable transmission component includes a geared motor (4097). The geared motor (4097) is fixedly arranged on the side wall of the housing (4091). The output shaft end of the geared motor (4097) is provided with a drive shaft (4098). A drive wheel (40910) is provided on the drive shaft (4098). A driven shaft (4099) is arranged side by side above the drive shaft (4098). A driven wheel (40911) of the guiding device is provided on the driven shaft (4099). The drive wheel (40910) and the driven wheel (40911) of the guiding device are matched in position. The drive wheel (40910) and the driven wheel (40911) of the guiding device are provided with grooves, and the cable is passed through the grooves.

3. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The cable guiding component is also matched with a cable tension detection component, which includes a rotating plate (4093), a second roller (4094), and an angular displacement sensor (4095). There are two sets of rotating plates (4093), which are respectively set on both sides of the housing (4091). A rotating shaft is set on the top of the housing (4091). One end of the rotating plate (4093) is hinged to the rotating shaft on the top of the housing (4091). The other end of the rotating plate (4093) is set with a second roller (4094). An angular displacement sensor (4095) is also set on the rotating shaft on the top of the housing (4091).

4. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The first cable winding and unwinding device (4) and the second cable winding and unwinding device (8) are provided with winding and unwinding device covers (6). The winding and unwinding device covers (6) include a movable cover plate (601). The movable cover plate (601) is set on the cable reel (402). The movable cover plate (601) is hinged to the winding and unwinding device covers (6). Electric push rods (602) are provided on both sides of the winding and unwinding device covers (6). The output shaft of the electric push rod (602) is provided with a first hinge shaft (603) and the cylinder tail is provided with a second hinge shaft (604). The first hinge shaft (603) is set on the movable cover plate (601) and the second hinge shaft (604) is set on the winding and unwinding device covers (6).

5. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 4, characterized in that: The movable cover plate (601) is provided with a support bar (605) at one end near the control room (5), and the support bar (605) is fixedly installed on the side wall of the control room (5).

6. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The drive-type rotary tracked chassis (1) includes a driven wheel (104), and a tensioning device (106) is matched on the driven wheel (104). The tensioning device (106) includes a support (1061), which is fixedly mounted on the frame (107). A first vertical plate (10611) and a second vertical plate (10612) are respectively provided at both ends of the support (1061). A hydraulic cylinder (1062) is provided on the support (1061). The tail end of the hydraulic cylinder (1062) is fixedly mounted on the first vertical plate (10611). The cylinder of the hydraulic cylinder (1062) passes through the second vertical plate (10612). The output shaft of the hydraulic cylinder (1062) faces the driven wheel (104). A top cover (1066) is provided at the output shaft end of the hydraulic cylinder (1062). The top cover (1066) is connected to the driven wheel (104).

7. A rotary chassis type electric shovel tail cable retraction vehicle according to claim 6, characterized in that: The hydraulic cylinder (1062) is circumferentially provided with a guide shaft (1063), which passes through the second vertical plate (10612). One end of the guide shaft (1063) is fixedly connected to the top cover (1066). A linear bearing (1065) is also provided on the second vertical plate (10612), and the guide shaft (1063) passes through the linear bearing (1065). A set of springs (1064) is sleeved on each of the guide shafts (1063) on both sides of the second vertical plate (10612).

8. The rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The drive-type rotary tracked chassis (1) includes a frame (107), which is an H-type frame.

9. A rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The installation platform (3) is provided with knurled patterns for anti-slip treatment.

10. A rotary chassis type electric shovel tail cable retraction vehicle according to claim 1, characterized in that: The installation platform (3) is equipped with guardrails (7) on both sides.

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