Cable truck rotating tail ladder

Abstract

A kind of cable truck rotary tail ladder, solve the problem of traditional truck fixed tail ladder space occupation, operation inflexible, inconvenient maintenance and slippery in rain and snow day.It includes rotating shaft and pedal, truck body tail is connected bumper through connecting rod, bumper side is connected bottom plate, bottom plate lower end is equipped with rotating shaft that can rotate around its own axis, shaft is inserted with pedal that rotates synchronously, bumper is provided with angle steel plate to fix rotating motor, transmission gear of motor transmission shaft is engaged with tapered nut on the outer wall of rotating shaft;Bottom plate and bumper, angle steel plate and bumper are detachably connected, pedal is inserted with rotating shaft and fixed, and has water seepage hole.This tail ladder can rotate flexibly, operation is convenient, safety is high, and is convenient for maintenance, adapts to cable freight operation demand.

Description

Technical Field

[0001] This utility model belongs to the field of cable transportation devices, and specifically relates to a rotating tail ladder for cable freight vehicles. Background Technology

[0002] In the cable freight industry, cable trucks, as core equipment for carrying and transporting cables and cable reels, require a ladder at the rear to meet the needs of operators who frequently need to get on and off the truck for tasks such as loading and unloading cable reels, assisting with cable laying, maintaining equipment on the roof, and temporarily securing cables. Currently, most cable trucks on the market have fixed ladders, meaning the ladder is rigidly connected to the truck body or bumper, making it impossible to rotate and adjust it according to the specific needs of cable operation scenarios. This type of fixed ladder has significant limitations in cable transportation scenarios: Firstly, cable freight vehicles often need to travel or park in cable storage areas, field construction sites, and other similar locations. The fixed ladders always protrude from the outside of the vehicle body, which not only increases the overall width of the vehicle, but also makes it easy to collide with cable reels in storage areas, cable supports in construction areas, or other freight equipment. This may damage the cables or equipment and seriously affect driving safety. At the same time, in narrow construction site passages or temporary parking areas, the protruding ladders will further restrict the flexibility of vehicle passage and parking. Secondly, when manually loading and unloading large cable reels with a crane, it is necessary to get on and off the vehicle from different positions at the rear to adjust the position of the cable reel; before laying the cable, the cable end needs to be fixed at different angles at the rear of the vehicle—but the step position of the fixed ladder is fixed, and the operator has to accommodate the ladder position to carry heavy cables, which not only increases the labor intensity, but may also cause the cable to be bumped or scratched due to the limited operating space. Third, the connection structure of some fixed ladders is complicated, and the installation and disassembly take a long time. If the ladder parts are damaged, it will directly affect the cable transportation and operation schedule. In addition, in rainy or snowy weather, water is easy to accumulate on the surface of the steps, which increases the risk of slipping for operators who need to carry cables up and down the vehicle, and can easily lead to personal safety accidents. Summary of the Invention

[0003] In view of the technical problems existing in the background art, the present invention provides a rotating tail ladder for cable freight trucks. Through optimized structural design, the ladder can rotate flexibly, improving the convenience and safety of operation. At the same time, it is easy to install, maintain and replace, so as to meet the practical needs of the freight industry for auxiliary equipment of trucks.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A rotating tail ladder for a cable freight vehicle includes a rotating shaft and a pedal. The rear of the vehicle body is fixedly connected to a bumper via a connecting rod. The side of the bumper is connected to a base plate, and the rotating shaft is vertically mounted on the lower end of the base plate. The rotating shaft can rotate freely around its own axis, and a pedal is inserted into the rotating shaft, and the pedal rotates synchronously with the rotating shaft.

[0005] In a preferred embodiment, the base plate and the back surface of the bumper are detachably connected by a first screw, and the base plate is provided with a rotating base; the bottom of the rotating shaft is inserted into the rotating base and can rotate freely around its own axis.

[0006] In a preferred embodiment, bearing housings are installed on the rear of the truck body and on the bumper, and the rotating shaft is fixed inside the bearing housings and is tactilely connected to the bearing housings.

[0007] In a preferred embodiment, an angle steel plate is installed on the bumper. One side of the angle steel plate is fixedly welded to the rotary motor, and the other side of the angle steel plate is detachably connected to the bumper by a second screw.

[0008] In a preferred embodiment, a tapered nut is provided on the outer wall of the rotating shaft, and the drive shaft of the rotating motor is connected to a drive gear, which meshes with the tapered nut.

[0009] In the preferred embodiment, the rotating shaft is provided with equidistant insertion interfaces, and the side of the pedal is provided with a corresponding insertion plate, which is inserted and mated with the insertion interfaces; limit holes are correspondingly opened on the other side of the rotating shaft and the insertion plate, and the limit bolt passes through the limit hole and is threadedly connected to the fixing nut to lock and fix the position of the rotating shaft and the pedal.

[0010] In the preferred embodiment, the pedal is provided with drainage holes.

[0011] A rotating tail ladder for cable freight vehicles can achieve the following beneficial effects: 1. Since the rotating shaft can rotate freely around its own axis, when the cable freight vehicle is traveling or parked, the pedal can be rotated to a position that fits the vehicle body, preventing the ladder from protruding outside the vehicle body. This not only prevents collisions with cable reels in the cable storage area, cable supports at field construction sites, and other freight equipment, protecting cables and equipment from damage, but also effectively reduces the overall space occupied by the vehicle, making it easier for the vehicle to pass through narrow construction site passages and cable storage area passages and to park temporarily. This solves the problem of poor space adaptability of traditional fixed ladders in cable operation scenarios. 2. The pedal rotates synchronously with the rotating shaft. Operators can flexibly adjust the angle and position of the pedal according to the needs of different cable operation scenarios such as cable reel loading and unloading, cable laying, and roof maintenance. There is no need to carry the cable in a fixed ladder position, which reduces labor intensity and avoids cable bumps and scratches due to limited operating space, thus improving work efficiency and cable transportation protection. 3. The base plate and bumper are detachably connected by the first screw, the angle steel plate and bumper are detachably connected by the second screw, and the pedal and rotating shaft are locked together by plug-in fitting, limit bolts and fixing nuts. These connection methods not only ensure the structural stability, but also enable the quick installation, disassembly and replacement of each component of the ladder, avoiding maintenance delays caused by the cumbersome disassembly and assembly of traditional ladders, and ensuring that the transportation and operation schedule of the cable freight vehicle are not affected. 4. Drainage holes are provided on the pedals to drain rainwater and melted snow from the surface of the pedals in time during outdoor cable work in rainy or snowy weather. This prevents operators from slipping and getting on and off the vehicle while carrying cables, and also prevents water accumulation from corroding the pedal structure, further ensuring the personal safety of cable workers and extending the service life of the ladder. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall installation position of this utility model; Figure 2 This is a rear top view of the overall structure of this utility model; Figure 3 This is an enlarged schematic diagram of the transmission mechanism structure of this utility model; Figure 4 This is an enlarged schematic diagram of the pedal mounting structure of this utility model.

[0013] In the diagram: 1. Truck body; 2. Bumper; 3. Connecting rod; 4. Base plate; 5. Rotating shaft; 6. Pedal; 7. First screw; 8. Rotating base; 9. Rotating motor; 10. Angle steel plate; 11. Second screw; 12. Transmission gear; 13. Conical nut; 14. Bearing seat; 15. Plug-in interface; 16. Plug-in plate; 17. Limiting hole; 18. Drain hole; 19. Fixing nut; 20. Limiting bolt. Detailed Implementation

[0014] like Figure 1 and Figure 2As shown, a rotating tail ladder for a cable transport vehicle includes a rotating shaft 5 and a step 6. The rear of the vehicle body 1 is fixedly connected to the bumper 2 via a connecting rod 3. The connecting rod 3 is made of Q235 high-strength round steel with a diameter of 16-20mm. Both ends are welded and fixed to the rear reinforcing crossbeam of the vehicle body 1 and the inner side of the bumper 2, respectively. The welding length is not less than 50mm, and the weld leg height is 8mm. It can bear a load of no more than 150kg for the total weight of the operator and the cable in a single trip, making it suitable for cable handling scenarios. The side surface of the bumper 2 is connected to the base plate 4 by welding. The base plate 4 is made of Q235 galvanized steel plate with a thickness of 8-10mm and a zinc coating thickness of not less than 8μm, combining load-bearing capacity and outdoor corrosion resistance. The rotating shaft 5 is vertically installed on its lower end face. The rotating shaft 5 is made of 45# steel with heat treatment, achieving a hardness of HRC28-32, and has a diameter of 30-35mm. The connection between the rotating shaft 5 and the base plate 4 is reinforced by full circumferential welding, with a weld leg height of 6mm. The rotating shaft 5 can rotate freely around its own axis with a rotational resistance not exceeding 50N. A pedal 6 is inserted into the rotating shaft 5. The pedal 6 is made of anti-slip patterned steel plate with a pattern depth of 1.5mm and an anti-slip coefficient of not less than 0.8. The pedal 6 rotates synchronously with the rotating shaft 5, with a rotation angle range of 0-180 degrees. 0 degrees corresponds to the pedal being in contact with the vehicle body during driving or parking; 90 to 120 degrees correspond to cable reel loading and unloading operations; and 180 degrees correspond to cable laying operations at the rear of the vehicle, adapting to different cable operation scenarios.

[0015] Preferred solutions include Figure 2 As shown, the back surface of the base plate 4 and the bumper 2 are detachably connected by the first screw 7. The first screw 7 is a high-strength bolt of M8-M10, and 3-4 of them are equidistantly arranged along the length of the base plate 4. The base plate 4 is provided with a rotating base 8, which is integrally formed or welded to the base plate 4. The rotating base 8 is provided with a bearing adapted to the rotating shaft 5 inside. The bottom of the rotating shaft 5 is inserted into the rotating base 8 and can rotate freely around its own axis through the bearing. There is no obvious jamming during the rotation.

[0016] Preferred solutions include Figure 2 As shown, bearing seats 14 are installed on the rear of the truck body 1 and the bumper 2. The bearing seats 14 are fixed to the rear of the truck body 1 and the bumper 2 respectively by bolts, and deep groove ball bearings are installed inside them. The rotating shaft 5 is fixed in the bearing in the bearing seat 14 and is rolledly connected to the bearing seat 14 through the bearing, which further improves the stability and smoothness of the rotation of the rotating shaft 5.

[0017] Preferred solutions include Figure 3As shown, an angle steel plate 10 is installed on the bumper 2. The angle steel plate 10 is made of Q235 material and has a thickness of 6-8mm. One side of the angle steel plate 10 is fixedly welded to the rotary motor 9, and the weld is ground to ensure a firm connection. The other side of the angle steel plate 10 is detachably connected to the bumper 2 by a second screw 11. The second screw 11 has the same specifications as the first screw 7, and there are 2-3 of them to facilitate the installation and maintenance of the rotary motor 9.

[0018] Preferred solutions include Figure 3 As shown, a tapered nut 13 is provided on the outer wall of the rotating shaft 5. The tapered nut 13 is connected to the rotating shaft 5 by a key or welded and fixed. The tapered angle is 30-45 degrees. The drive shaft of the rotary motor 9 is connected to the drive gear 12. The drive gear 12 is fixed to the drive shaft by a flat key. The drive gear 12 is engaged with the tapered nut 13. The meshing gap is controlled at 0.1-0.3mm. The rotary motor 9 can drive the rotating shaft 5 to achieve precise rotation by rotating it in both directions.

[0019] Preferred solutions include Figure 4 As shown, the rotating shaft 5 is provided with equidistant insertion interfaces 15, the cross-sectional shape of the insertion interfaces 15 is rectangular, and the spacing is 150-200mm; the side of the pedal 6 is provided with a corresponding insertion plate 16, the insertion plate 16 is integrally formed with the pedal 6, and the insertion plate 16 and the insertion interface 15 are inserted and matched, with a matching gap of no more than 0.5mm; the other side of the rotating shaft 5 and the insertion plate 16 are respectively provided with limit holes 17, the diameter of the limit holes 17 is 10-12mm; the limit bolt 20 passes through the limit hole 17 and is threadedly connected to the fixing nut 19. The limit bolt 20 is a high-strength bolt to lock and fix the position of the rotating shaft 5 and the pedal 6 to prevent the pedal 6 from loosening during use.

[0020] Preferred solutions include Figure 4 As shown, the pedal 6 is provided with drainage holes 18. The diameter of the drainage holes 18 is 8-10mm, and they are arranged in a matrix with a spacing of 30-50mm. This allows rainwater, snow meltwater, and other water to be drained from the surface of the pedal 6 quickly, preventing water accumulation from causing the operator to slip.

[0021] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model. The double-connecting plate structure, through the symmetrical force-bearing design of the parallel plate surfaces, evenly distributes the jumper tension to the two connecting plates, which can improve the structural bearing capacity by 20% compared to the single-connecting plate solution, and is suitable for long-span transmission lines or areas with strong wind loads. The connecting holes of the twin connecting plates are staggered and equidistantly distributed, and the synchronous installation of the double strings of the vertical string assembly 3 can be achieved by adjusting different hole positions, solving the problem that the traditional single-hole crossarm cannot be used to install double jumper strings.

Claims

1. A rotating tail ladder for a cable freight vehicle, comprising a rotating shaft (5) and a footboard (6), characterized in that: The rear of the truck body (1) is fixedly connected to the bumper (2) via a connecting rod (3). The side of the bumper (2) is connected to the base plate (4). A rotating shaft (5) is vertically installed on the lower end of the base plate (4). The rotating shaft (5) can rotate freely around its own axis. A pedal (6) is inserted into the rotating shaft (5), and the pedal (6) rotates synchronously with the rotating shaft (5).

2. The rotating tail ladder of the cable freight vehicle according to claim 1, characterized in that: The back of the base plate (4) and the bumper (2) are detachably connected by the first screw (7). The base plate (4) is provided with a rotating base (8). The bottom of the rotating shaft (5) is inserted into the rotating base (8) and can rotate freely around its own axis.

3. The rotating tail ladder of the cable freight vehicle according to claim 1, characterized in that: Bearing seats (14) are installed on the rear of the truck body (1) and the bumper (2). The rotating shaft (5) is fixed inside the bearing seat (14) and is tumbledly connected to the bearing seat (14).

4. The rotating tail ladder of the cable freight vehicle according to claim 1, characterized in that: An angle steel plate (10) is installed on the bumper (2). One side of the angle steel plate (10) is fixedly welded to the rotary motor (9), and the other side of the angle steel plate (10) is detachably connected to the bumper (2) by a second screw (11).

5. The rotating tail ladder of the cable freight vehicle according to claim 4, characterized in that: A conical nut (13) is provided on the outer wall of the rotating shaft (5), and the transmission shaft of the rotating motor (9) is connected to the transmission gear (12), which meshes with the conical nut (13).

6. The rotating tail ladder of the cable freight vehicle according to claim 1, characterized in that: The rotating shaft (5) is provided with equidistant insertion interfaces (15), and the side of the pedal (6) is provided with a corresponding insertion plate (16), and the insertion plate (16) is inserted into the insertion interface (15). On the other side of the rotating shaft (5) and the plug plate (16), a limit hole (17) is opened. The limit bolt (20) passes through the limit hole (17) and is threaded to the fixing nut (19) to lock and fix the position of the rotating shaft (5) and the pedal (6).

7. The rotating tail ladder of the cable freight vehicle according to claim 1, characterized in that: A drainage hole (18) is provided on the pedal (6).

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