A mobile telescopic loading and unloading machine

Abstract

This utility model discloses a movable telescopic loading and unloading machine, including a base, a frame rotatably connected to the rear end of the base, a tail plate fixedly connected to the rear end of the frame, an extension plate provided at the front end of the frame, and evenly distributed casters on the lower side of the base. It also includes a counterweight assembly. The counterweight assembly includes a mounting compartment, guide rods, a counterweight block, a fixed rod, a rack plate, a gear, and a driven rack plate. The mounting compartment is fixedly connected to the lower side of the tail plate. Symmetrically distributed guide rods are fixedly connected between the front and rear inner walls of the mounting compartment. The counterweight block is slidably connected between two guide rods. The fixed rod is slidably connected inside a sliding hole in the front side wall of the mounting compartment. The front side of the fixed rod is fixedly connected to the rear side of the extension plate. This movable telescopic loading and unloading machine combines flexible mobility and adaptability to different operating ranges. The counterweight can automatically and synchronously adjust its balance to prevent tipping without manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of logistics technology, specifically a mobile telescopic loading and unloading machine. Background Technology

[0002] With the rapid development of the global logistics industry, the scale and frequency of cargo transportation continue to increase. As a core link in the logistics flow, loading and unloading operations directly affect cargo turnover efficiency and overall operating costs. Whether it is the transfer of raw materials in industrial production, the receipt and dispatch of goods in warehousing logistics, or the loading and unloading connection in last-mile delivery, it is necessary to rely on flexible and efficient loading and unloading equipment to achieve the smooth transfer of goods between the carriage, platform and the ground. Especially in small and medium-sized logistics stations, factory workshops and other scenarios, higher requirements are placed on the mobility, adaptability of the operating range and ease of operation of loading and unloading equipment in order to meet the diverse needs of different specifications of goods, different carriage heights and different operating sites.

[0003] Mobile loading and unloading equipment commonly used in current logistics scenarios typically includes a base, a rotatable load-bearing frame, a tail plate, and a retractable extension plate. Casters are provided under the base to enable flexible movement of the equipment. During operation, the operator pushes the equipment to the target work point, locks the casters or uses a simple fixing structure to position the equipment, and then adjusts the tilt angle of the load-bearing frame and the tail plate by hydraulic drive or manual adjustment to make it fit the floor of the vehicle or the ground. The extension plate is then controlled to adapt to different working lengths. Finally, the goods are manually pushed, and the load-bearing surface formed by the tail plate and the extension plate is used to complete the transfer of goods between different carriers. Due to its mobility, this type of equipment is widely adaptable to various work scenarios and reduces the labor intensity of manual handling to a certain extent.

[0004] However, existing mobile telescopic loading and unloading equipment still has some areas for optimization in practical applications: when the extension plate extends forward to extend the working length, the front load arm will increase accordingly, causing the center of gravity of the equipment to shift forward, which can easily lead to safety hazards such as front tilting or even overturning. Usually, it is necessary to manually configure additional counterweights or adjust the position of the equipment in real time, which is quite cumbersome. To address this, we propose a mobile telescopic loading and unloading machine. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a mobile telescopic loading and unloading machine that can automatically and synchronously adjust the counterweight balance to avoid tipping over without manual intervention throughout the process, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a movable telescopic loading and unloading machine, including a base, a frame rotatably connected to the rear end of the base, a tail plate fixedly connected to the rear end of the frame, an extension plate provided at the front end of the frame, casters evenly distributed on the lower side of the base, and a counterweight assembly.

[0007] The counterweight assembly includes an installation chamber, guide rods, a counterweight block, a fixed rod, a rack plate, a gear, and a driven rack plate. The installation chamber is fixedly connected to the lower side of the tail plate. Symmetrically distributed guide rods are fixedly connected between the front and rear inner walls of the installation chamber. The counterweight block is slidably connected between two guide rods. The fixed rod is slidably connected inside a sliding hole in the front side wall of the installation chamber. The front side of the fixed rod is fixedly connected to the rear side of the extension plate. A gear is rotatably connected between the left and right inner walls of the installation chamber. A rack plate is fixedly connected to the lower side of the fixed rod. A driven rack plate is fixedly connected to the upper side of the counterweight block. Both the driven rack plate and the rack plate are meshed with the gear. This design combines flexible mobility and adaptability to the operating range. The counterweight can automatically and synchronously adjust its balance to prevent tipping without manual intervention.

[0008] Furthermore, the left and right inner walls of the frame are provided with sliding grooves on their front sides. The expansion plate is slidably connected between the two sliding grooves. The sliding grooves on the left and right inner walls of the frame provide precise guidance and limit for the expansion plate, ensuring that the expansion plate can extend and retract smoothly without deviation, while also bearing the weight of the expansion plate.

[0009] Furthermore, a drive plate is fixedly connected to the right side of the expansion plate, and an avoidance groove corresponding to the drive plate is opened on the right inner wall of the right side slide. A hydraulic rod is installed on the right side of the frame, and the telescopic end of the hydraulic rod is fixedly connected to the rear side of the drive plate. The hydraulic port of the hydraulic rod is connected to the output port of an external hydraulic oil pump to realize the power transmission of the expansion plate.

[0010] Furthermore, slide rails are installed on both the left and right sides of the rear end of the base. Slide rods are slidably connected inside the slide rails. An angle adjustment rod is rotatably connected to the outer arc surface of the slide rod. Symmetrically distributed U-shaped seats are fixedly connected to the lower side of the tail plate. The upper end of the angle adjustment rod is rotatably connected to the interior of the adjacent U-shaped seat on the upper side. The rotatable connection structure of the slide rails, slide rods, angle adjustment rods and U-shaped seats forms a stable angle transmission link, which can flexibly adjust the tilt angle of the frame and tail plate to adapt to different carriage heights or ground slopes.

[0011] Furthermore, hydraulic cylinders are installed on both the left and right sides of the rear end of the base. The extension and retraction ends of the hydraulic cylinders are rotatably connected to the outer arc surface of the adjacent slide rod on the rear side. The two hydraulic cylinders work together and are both used in conjunction with an external hydraulic oil pump to provide sufficient and balanced power for angle adjustment.

[0012] Furthermore, the base has threaded support rods at both the front and rear ends on both sides, and the lower ends of the support rods are fixedly connected to support feet. The threaded support rods and support feet can be flexibly adjusted in height, which can quickly fix the equipment on the ground with different flatness.

[0013] Furthermore, the upper side of the front end of the tail plate is provided with a transition slope. The transition slope at the front end of the tail plate enables the smooth transition of goods between the tail plate and the extension plate, reducing collision and friction during goods transfer and lowering the risk of goods damage.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This movable telescopic loading and unloading machine has the following advantages:

[0015] The counterweight assembly, through a meshing transmission structure of rack, pinion, and driven rack, can automatically and synchronously adjust the position of the counterweight block as the extension plate extends and retracts. When the extension plate extends forward to increase the front load arm, the counterweight block moves backward along the guide rod to increase the rear counterweight arm. Through torque cancellation, the front end of the equipment is effectively prevented from tipping over. When the extension plate retracts, the counterweight block synchronously resets forward, quickly restoring the equipment's center of gravity balance. Dynamic balance adjustment can be achieved without manual intervention throughout the entire process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural schematic diagram on the right side of the present invention;

[0018] Figure 3 This is a partial cross-sectional structural schematic diagram of the present invention;

[0019] Figure 4 This is a partial structural diagram of the frame of this utility model;

[0020] Figure 5 This is an enlarged structural schematic diagram of point A of this utility model.

[0021] In the diagram: 1. Base, 2. Counterweight assembly, 21. Mounting chamber, 22. Guide rod, 23. Counterweight block, 24. Fixing rod, 25. Rack plate, 26. Gear, 27. Driven rack plate, 3. Frame, 4. Tail plate, 5. Extension plate, 6. Slide groove, 7. Drive plate, 8. Hydraulic rod, 9. Slide rail, 10. Slide rod, 11. Angle adjustment rod, 12. U-shaped seat, 13. Hydraulic cylinder, 14. Casters, 15. Support rod, 16. Support foot, 17. Transition slope. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This embodiment provides a technical solution: a movable telescopic loading and unloading machine, including a base 1, a frame 3 rotatably connected to the rear end of the base 1, a tail plate 4 fixedly connected to the rear end of the frame 3, a transition slope 17 on the upper side of the front end of the tail plate 4, an extension plate 5 on the front end of the frame 3, the upper side of the extension plate 5 contacting the upper side of the tail plate 4, grooves 6 on the front sides of the left and right inner walls of the frame 3, the extension plate 5 slidably connected between the two grooves 6, and evenly distributed casters 14 on the lower side of the base 1. The two rear casters 14 are swivel casters with foot brakes in the prior art, and the two front casters 14 are casters with foot brakes in the prior art. The base 1 is equipped with four casters 14 on its lower side. The two front casters are one-way casters with foot brakes, and the two rear casters are swivel casters with foot brakes. The operator can push the equipment to move flexibly within the work area using the casters 14. The one-way casters ensure the stability of linear movement, while the swivel casters allow for steering adjustment to adapt to different work position requirements. After reaching the target work point, the brakes on the casters 14 are locked to fix the equipment position. After adjusting the angle of the frame 3 and the length of the extension plate 5, the goods can be manually pushed and transferred to the bearing surface of the tail plate 4 and the extension plate 5. The bearing surface is used to complete the loading of goods, such as from the ground / platform to the carriage, or the unloading, such as from the carriage to the ground / platform.

[0024] It also includes a counterweight assembly 2, which comprises an installation chamber 21, guide rods 22, a counterweight block 23, a fixing rod 24, a rack plate 25, a gear 26, and a driven rack plate 27. The installation chamber 21 is fixedly connected to the lower side of the tail plate 4. Symmetrically distributed guide rods 22 are fixedly connected between the front and rear inner walls of the installation chamber 21. The counterweight block 23 is slidably connected between two guide rods 22. The fixing rod 24 is slidably connected inside a sliding hole in the front side wall of the installation chamber 21. The front side of the fixing rod 24 is fixedly connected to the rear side of the expansion plate 5. A corrugated pipe can be provided between the rear side of the expansion plate 5 and the front side of the installation chamber 21. The fixing rod 24 leaks... The portion of the mounting chamber 21 is located inside the bellows, and the sliding hole is also located inside the bellows. This creates a sealed space between the mounting chamber 21 and the bellows. The rack plate 25, gear 26, and driven rack plate 27 are all located inside this sealed space, preventing external dust or debris from entering and affecting the transmission components. Gear 26 is rotatably connected between the left and right inner walls of the mounting chamber 21. The rack plate 25 is fixedly connected to the lower side of the fixed rod 24, and the driven rack plate 27 is fixedly connected to the upper side of the counterweight 23. Both the driven rack plate 27 and the rack plate 25 are meshed with gear 26. When the extension plate 5 extends or retracts, the counterweight assembly… 2. This can counteract the overturning moment caused by the extension plate 5 extending, specifically as follows: When the extension plate 5 moves back and forth, the fixed rod 24 fixedly connected to its rear slides synchronously with the extension plate 5 along the sliding hole on the front side of the mounting chamber 21. The rack plate 25 on the lower side of the fixed rod 24 meshes with the gear 26 rotatably connected between the left and right inner walls of the mounting chamber 21, driving the gear 26 to rotate around its own axis. At the same time, the gear 26 meshes with the driven rack plate 27 on the upper side of the counterweight 23. When the gear 26 rotates, it drives the driven rack plate 27 to move in the opposite direction to the rack plate 25. The symmetrical guide rod 22 between the front and rear inner walls of the mounting chamber 21 limits the counterweight 23, ensuring... To ensure smooth sliding along the guide rod 22 without lateral deviation, when the extension plate 5 extends forward to increase the front load arm, the counterweight block 23 moves backward along the guide rod 22 to increase the rear counterweight arm. The torque counteracts the load to prevent the front of the equipment from tipping over. When the extension plate 5 retracts backward, the counterweight block 23 moves forward synchronously to restore the equipment's center of gravity balance. No manual adjustment of the counterweight position is required throughout the process. The transition slope 17 on the upper side of the front end of the tail plate 4 provides a smooth transition channel for goods. Goods such as boxes, packages, and bulk containers can be transferred from the ground / carriage to the upper surface of the tail plate 4 through this slope, reducing the collision and friction between the goods and the tail plate 4 and reducing the risk of damage to the goods.

[0025] A drive plate 7 is fixedly connected to the right side of the extension plate 5. A clearance groove corresponding to the drive plate 7 is formed on the inner right side wall of the right-side slide groove 6. A hydraulic rod 8 is installed on the right side of the frame 3. The telescopic end of the hydraulic rod 8 is fixedly connected to the rear side of the drive plate 7. The weight of the extension plate 5 is entirely borne by the two slide grooves 6, and the telescopic end of the hydraulic rod 8 is not affected by the weight of the extension plate 5, thus preventing damage. The hydraulic port of the hydraulic rod 8 is connected to the output port of an external hydraulic pump. This external hydraulic pump can be installed on the upper side of the base 1. The external hydraulic pump supplies power to the frame... The hydraulic rod 8 on the right side of the frame 3 is pressurized. The telescopic end of the hydraulic rod 8 is fixedly connected to the drive plate 7 on the right side of the extension plate 5. The clearance groove on the inner wall of the right slide 6 provides movement space for the drive plate 7 to avoid interference with the frame 3. The slide 6 on the left and right inner walls of the frame 3 forms a limiting guide for the extension plate 5. When the hydraulic rod 8 extends, it drives the extension plate 5 to slide forward along the slide 6 through the drive plate 7, extending it outside the frame 3. The loading and unloading operation length can be extended as needed. When the hydraulic rod 8 retracts, it pulls the extension plate 5 to slide backward and return it to the inside of the frame 3, completing the length reset.

[0026] Slide tracks 9 are installed on both the left and right sides of the rear end of the base 1. Slide rods 10 are slidably connected inside the slide tracks 9. Angle adjustment rods 11 are rotatably connected to the outer arc surface of the slide rods 10. U-shaped seats 12 are symmetrically distributed and fixedly connected to the lower side of the tail plate 4. The upper end of the angle adjustment rods 11 is rotatably connected to the interior of the adjacent upper U-shaped seats 12. When the slide rods 10 move, the angle adjustment rods 11 connected to the outer arc surface of the slide rods 10 rotate around their own axis. The upper end of the angle adjustment rods 11 is rotatably connected to the U-shaped seats 12 on the lower side of the tail plate 4. When the slide rods 10 slide forward, the angle adjustment rods 11 push the tail plate 4 upward, causing the frame 3 to flip upward around the rear end of the base 1. When the slide rods 10 slide backward, the angle adjustment rods 11 pull the tail plate 4 downward, ultimately achieving the angle adaptation of the frame 3 with the ground or the carriage, such as fitting the carriage floor or forming a gentle slope.

[0027] Hydraulic cylinders 13 are installed on both the left and right sides of the rear end of the base 1. The extension and retraction ends of the hydraulic cylinders 13 are rotatably connected to the outer arc surface of the adjacent slide rod 10 on the rear side. The weight of the slide rod 10 is directly borne by the slide rail 9. The extension and retraction ends of the hydraulic cylinders 13 do not participate in the weight-bearing work of the slide rod 10, thus making it less likely to be damaged by the weight of the slide rod 10. The two hydraulic cylinders 13 are used in conjunction with an external hydraulic oil pump. A flow divider and combiner valve can be installed on the upper side of the base 1. The hydraulic ports of the two hydraulic cylinders 13 are connected to the output port of the flow divider and combiner valve. The external hydraulic oil pump is connected to the input port of the flow divider and combiner valve. The external hydraulic oil pump provides hydraulic power to the hydraulic cylinders 13 on the left and right sides of the rear end of the base 1. The flow divider and combiner valve installed on the upper side of the base 1 ensures that the extension and retraction of the two hydraulic cylinders 13 are synchronized. The extension and retraction ends of the hydraulic cylinders 13 are rotatably connected to the outer arc surface of the slide rod 10 in the slide rail 9. The extension and retraction action pushes the slide rod 10 to slide back and forth in the slide rail 9.

[0028] The base 1 has threaded support rods 15 at both ends on the left and right sides. The lower ends of the support rods 15 are fixedly connected to support feet 16. After reaching the target work point, rotate the threaded support rods 15 at the front and rear ends on the left and right sides of the base 1 so that the support feet 16 at the lower ends of the support rods 15 are pressed against the ground and tightened. The position of the equipment is fixed by the self-locking characteristic of the threads.

[0029] The working principle of the movable telescopic loading and unloading machine provided by this utility model is as follows: The lower side of the base 1 is equipped with four casters 14, of which the two front casters are one-way casters with foot brakes, and the two rear casters are omnidirectional casters with foot brakes. The operator can push the equipment to move flexibly within the work area via the casters 14. The one-way casters ensure linear stability, while the omnidirectional casters allow for steering adjustment to adapt to different work position requirements. After reaching the target work point, the threaded support rods 15 on the left and right sides of the base 1 are rotated, causing the lower support feet 16 of the support rods 15 to press downwards against the ground and tighten. The self-locking characteristic of the threads fixes the equipment position, and simultaneously locks the brakes on the casters 14, providing double protection for the stability of the equipment when stationary and preventing displacement due to vibration or cargo weight during operation. An external hydraulic pump pumps oil to the rear left of the base 1. Hydraulic cylinders 13 on both sides provide hydraulic power. The diversion and combination valves installed on the upper side of the base 1 ensure that the extension and retraction of the two hydraulic cylinders 13 are synchronized. The extension and retraction ends of the hydraulic cylinders 13 are rotatably connected to the outer arc surface of the slide rod 10 in the slide rail 9. The extension and retraction action pushes the slide rod 10 to slide back and forth in the slide rail 9, thereby driving the angle adjustment rod 11 connected to the outer arc surface of the slide rod 10 to rotate around its own axis. The upper end of the angle adjustment rod 11 is rotatably connected to the U-shaped seat 12 on the lower side of the tail plate 4. When the slide rod 10 slides forward, the angle adjustment rod 11 pushes the tail plate 4 upward, causing the frame 3 to flip upward around the rear end of the base 1. When the slide rod 10 slides backward, the angle adjustment rod 11 pulls the tail plate 4 downward, ultimately achieving the angle adaptation of the frame 3 with the ground or the carriage, such as fitting the carriage floor or forming a gentle slope.

[0030] An external hydraulic pump supplies pressure to the hydraulic rod 8 on the right side of frame 3. The telescopic end of the hydraulic rod 8 is fixedly connected to the drive plate 7 on the right side of the extension plate 5. The clearance groove on the inner wall of the right-side slide 6 provides movement space for the drive plate 7, avoiding interference with frame 3. The slide grooves 6 on the left and right inner walls of frame 3 form a limiting guide for the extension plate 5. When the hydraulic rod 8 extends, it drives the extension plate 5 to slide forward along the slide grooves 6 through the drive plate 7, extending it outside the frame 3 to extend the loading and unloading length as needed. When the hydraulic rod 8 retracts, it pulls the extension plate 5 to slide backward and retract it back into the frame. Inside frame 3, the length is reset. When the extension plate 5 extends or retracts, the counterweight assembly 2 can counteract the overturning moment caused by the extension plate 5 extending. Specifically, when the extension plate 5 moves back and forth, the fixed rod 24 fixedly connected to its rear slides synchronously with the extension plate 5 along the sliding hole on the front side of the mounting chamber 21. The rack plate 25 on the lower side of the fixed rod 24 meshes with the gear 26 rotatably connected between the left and right inner walls of the mounting chamber 21, driving the gear 26 to rotate around its own axis. At the same time, the gear 26 meshes with the driven rack plate 27 on the upper side of the counterweight block 23. During rotation, the driven rack plate 27 moves in the opposite direction to the rack plate 25. The symmetrical guide rod 22 between the front and rear inner walls of the installation chamber 21 limits the counterweight 23, ensuring that it slides smoothly along the guide rod 22 without lateral deviation. When the extension plate 5 extends forward to increase the front load arm, the counterweight 23 moves backward along the guide rod 22 to increase the rear counterweight arm. The torque counteracts the load to prevent the front of the equipment from tipping over. When the extension plate 5 retracts backward, the counterweight 23 moves forward synchronously to restore the balance of the equipment's center of gravity. No manual adjustment is required throughout the process. The transition ramp 17 on the upper side of the front end of the tailboard 4 provides a smooth transition channel for goods. Goods such as boxes, parcels, and bulk containers can be transferred from the ground / carriage to the upper surface of the tailboard 4 through this ramp, reducing the collision and friction between the goods and the tailboard 4 and reducing the risk of damage to the goods. After adjusting the angle of the frame 3 and the length of the extension plate 5, the goods can be manually pushed to the bearing surface of the tailboard 4 and the extension plate 5. The bearing surface is used to complete the loading of goods, such as from the ground / platform to the carriage, or the unloading, such as from the carriage to the ground / platform.

[0031] After loading and unloading, the external hydraulic oil pump supplies pressure in reverse: the hydraulic rod 8 retracts, driving the extension plate 5 back into the frame 3, the counterweight 23 synchronously resets forward, the hydraulic cylinder 13 retracts, pulling the slide rod 10 to slide backward, the frame 3 is leveled around the base 1 rotation axis, the support rod 15 is rotated to make the support leg 16 leave the ground, the brake of the caster 14 is released, and the equipment is pushed to the storage position via the caster 14.

[0032] It is worth noting that the hydraulic rod 8 disclosed in the above embodiments can be model SMCCHKDB20-500, and the hydraulic cylinder 13 can be model SMCCHKD40-200.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A movable telescopic loader, comprising a base (1), the rear end of the base (1) is rotatably connected with a frame (3), the inner rear end of the frame (3) is fixedly connected with a tail plate (4), the inner front end of the frame (3) is provided with an expansion plate (5), the lower side of the base (1) is provided with evenly distributed casters (14), characterized in that: It also includes a counterweight component (2); Counterweight assembly (2): It includes a mounting chamber (21), guide rods (22), counterweight block (23), fixing rod (24), rack plate (25), gear (26), and driven rack plate (27). The mounting chamber (21) is fixedly connected to the lower side of the tail plate (4). The guide rods (22) are symmetrically distributed between the front and rear inner walls of the mounting chamber (21). The counterweight block (23) is slidably connected between the two guide rods (22). The fixing rod (24) The mounting rod (24) is slidably connected to the sliding hole in the front side wall of the mounting chamber (21). The front side of the fixing rod (24) is fixedly connected to the rear side of the expansion plate (5). The left and right inner walls of the mounting chamber (21) are rotatably connected to a gear (26). The lower side of the fixing rod (24) is fixedly connected to a rack plate (25). The upper side of the counterweight (23) is fixedly connected to a driven rack plate (27). Both the driven rack plate (27) and the rack plate (25) are meshed with the gear (26).

2. The movable telescopic loading and unloading machine according to claim 1, characterized in that: The frame (3) has grooves (6) on the front side of the left and right inner walls, and the expansion plate (5) is slidably connected between the two grooves (6).

3. A movable telescopic loading and unloading machine according to claim 2, characterized in that: The right side of the expansion plate (5) is fixedly connected to the drive plate (7), and the right inner wall of the right slide (6) is provided with a clearance groove corresponding to the drive plate (7). The right side of the frame (3) is equipped with a hydraulic rod (8), the telescopic end of the hydraulic rod (8) is fixedly connected to the rear side of the drive plate (7), and the hydraulic port of the hydraulic rod (8) is connected to the output port of the external hydraulic oil pump.

4. A movable telescopic loading and unloading machine according to claim 1, characterized in that: The base (1) has slides (9) installed on both the left and right sides of its rear end. The slides (9) are slidably connected to slide rods (10). The outer arc surface of the slide rods (10) is rotatably connected to angle adjustment rods (11). The lower side of the tail plate (4) is fixedly connected to symmetrically distributed U-shaped seats (12). The upper end of the angle adjustment rods (11) is rotatably connected to the interior of the adjacent U-shaped seats (12) on the upper side.

5. A movable telescopic loading and unloading machine according to claim 2, characterized in that: Hydraulic cylinders (13) are installed on both the left and right sides of the rear end of the base (1). The extension and retraction ends of the hydraulic cylinders (13) are rotatably connected to the outer arc surface of the adjacent slide rod (10) on the rear side. The two hydraulic cylinders (13) are used in conjunction with each other and are used in conjunction with the external hydraulic oil pump.

6. A movable telescopic loading and unloading machine according to claim 1, characterized in that: The base (1) has support rods (15) threadedly connected to the front and rear ends on both sides of the left and right sides, and support feet (16) are fixedly connected to the lower ends of the support rods (15).

7. A movable telescopic loading and unloading machine according to claim 1, characterized in that: The upper side of the front end of the tail plate (4) is provided with a transition slope (17).

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