Angle fixing type temporary storage frame capable of being matched with multi-size reel collecting barrels

The adjustment and constraint mechanism, consisting of a dual-axis servo motor and a worm gear, solves the problem of adapting the buffer rack to multi-size collection drums, improves the versatility and stability of the equipment, and ensures the positional accuracy and safety of the collection drums during storage.

CN121990289APending Publication Date: 2026-05-08CHANGSHU DONY ELECTRONICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGSHU DONY ELECTRONICS
Filing Date
2026-02-25
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Traditional buffer racks cannot accommodate various sizes of rolls, resulting in poor equipment versatility, low space utilization, and rolls are prone to rolling and shifting during storage, affecting the operational accuracy and safety of subsequent automated equipment.

Method used

The system employs a lateral adjustment module consisting of a dual-axis servo motor, a threaded rod, a threaded block, and a push rod, a longitudinal adjustment module driven by a cylinder, and a constraint mechanism consisting of a worm gear, a worm wheel, a gear, a rack and pinion, and a constraint block to achieve automatic adaptation and angle fixation of the buffer rack, ensuring stable storage of the collection drum.

Benefits of technology

It achieves precise adaptation of the buffer rack to multi-size rolls, improves space utilization and production flexibility, prevents rolls from rolling and shifting during storage, and ensures positional accuracy and safety.

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Abstract

The invention discloses an angle-fixed cache frame adaptable to multi-size collecting and winding drums, and relates to the technical field of warehouse logistics equipment.The angle-fixed cache frame comprises a rack and a controller, an adjusting mechanism is arranged on the rack, a restraining mechanism is arranged on the adjusting mechanism, and the adjusting mechanism comprises a mounting box. According to the angle-fixed temporary storage frame capable of being matched with the multi-size winding drums, the temporary storage frame can be accurately and automatically matched with the winding drums with different lengths and diameters through the transverse adjusting module composed of a double-shaft servo motor, a threaded rod, a threaded block and a push rod and the longitudinal adjusting module for driving the mounting platform to ascend and descend through an air cylinder; an operator only needs to input parameters through the controller, automatic adjustment of the width and the height of the buffer frame can be completed, the adaptability of equipment to collecting drums of different specifications is greatly improved, the trouble that tools are frequently replaced or adjusted due to product model changing is avoided, and the space utilization rate and the production flexibility are remarkably improved.
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Description

Technical Field

[0001] This invention relates to the field of warehousing and logistics equipment, and in particular to an angle-fixed buffer rack that can be adapted to multiple sizes of collection drums. Background Technology

[0002] A coiling drum is a key piece of equipment used in the continuous production and processing of metal strips to collect and organize the strip. It is usually cylindrical in shape. After the strip is rolled out from upstream equipment such as a rolling mill, it will continuously wrap around the coiling drum. As the coiling drum rotates, the strip is orderly wound into a tight and regular coil for subsequent handling, storage or further processing. It can effectively improve production efficiency and ensure the quality and neatness of the strip winding.

[0003] In the context of roll storage and logistics, rolls come in various specifications with different diameters and lengths. Traditional buffer racks, however, often have fixed-size support structures that can only accommodate single or limited roll sizes. Whenever the roll model is changed, the buffer rack must be cumbersomely readjusted or replaced entirely, resulting in poor equipment versatility and low storage space utilization. Furthermore, existing buffer racks lack effective and stable constraints on the placement angle of rolls. Rolls are prone to rolling and shifting due to slight vibrations or external disturbances during buffering. This can cause wear and tear on the roll body or edges, pose safety hazards, and directly affect the alignment accuracy and operational efficiency of subsequent automated equipment such as AGVs during loading and unloading operations, thus hindering the automation and intelligent development of storage and logistics. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides the following technical solution: an angle-fixed buffer frame adaptable to multi-size collection drums, comprising a frame and a controller, wherein an adjustment mechanism is provided on the frame, and a constraint mechanism is provided on the adjustment mechanism; The adjustment mechanism includes a mounting box, inside which a dual-axis servo motor is fixedly connected. Threaded rods are fixedly connected to both output shafts of the dual-axis servo motor. Threaded blocks are threaded to the outer sides of the threaded rods. Push rods are fixedly connected to the outer sides of the threaded blocks. A cylinder is fixedly connected inside the frame. An installation platform is fixedly connected to the output end of the cylinder. A support rod is fixedly connected to the top of the installation platform. A cooperating rod is detachably installed on the outer side of the support rod. An installation sleeve is fitted onto the outer side of the cooperating rod.

[0005] Preferably, there are two racks symmetrically distributed on the left and right sides. The controller is fixedly connected to the front side of the left rack and is connected to the dual-axis servo motor and the cylinder signal respectively. The mounting box is located between the two racks.

[0006] Preferably, each of the two threaded rods is provided with a thread, the two thread sections are of equal length and opposite direction, and limit blocks are fixedly connected to the upper and lower sides of the threaded block, and limit grooves adapted to the movement trajectory of the limit blocks are fixedly connected to the upper and lower sides of the inner wall of the mounting box.

[0007] Preferably, the push rod is fixedly connected to the opposite sides of the two threaded blocks, and two push rods are fixedly connected to the outer side of each threaded block and are symmetrically distributed on the upper and lower sides of the threaded rod. The side of the push rod away from the threaded block is fixedly connected to the frame.

[0008] Preferably, the bottom of the installation platform is fixedly connected to a reinforcing block that is slidably connected to the outside of the frame. The reinforcing block is triangular in design, and there are two cooperating rods that are symmetrically distributed between the left and right support rods.

[0009] Preferably, T-shaped blocks are fixedly connected to both the upper and lower sides of the coordinating rod, and T-shaped grooves adapted to the moving trajectory of the T-shaped blocks are opened on both the upper and lower sides of the inner wall of the mounting cylinder.

[0010] Preferably, the constraint mechanism includes a protective box, a rotating shaft rotatably connected between the upper and lower sides of the inner wall of the protective box, a worm gear extending to the outer side of the inner wall of the protective box rotatably connected, a worm wheel and a gear fixedly connected to the outer side of the rotating shaft, a rack plate that meshes with the gear slidably connected inside the protective box, a connecting rod fixedly connected to the outer side of the rack plate, and a constraint block fixedly connected to the side of the connecting rod away from the rack plate.

[0011] Preferably, the protective box is fixedly connected to the top of the installation platform, the worm gear meshes with the worm wheel, the gear is located above the worm wheel, there are two rack plates symmetrically distributed on both sides of the gear, and the top of the rack plate is fixedly connected to a transmission rod that is slidably connected to the top wall of the protective box.

[0012] Preferably, there are two connecting rods, which are fixedly connected to the opposite sides of the two rack plates respectively. The connecting rods extend to the outside of the protective box. Both sides of the protective box are provided with clearance holes that are adapted to the movement trajectory of the connecting rods. The constraint blocks are slidably connected to the top surface of the protective box. The opposite sides of the two constraint blocks are designed with arc surfaces.

[0013] In summary, the present invention provides an angle-fixed buffer frame adaptable to multi-size reel rolls, which has the following beneficial effects: 1. This angle-fixed buffer rack, adaptable to multiple sizes of rolls, utilizes a lateral adjustment module consisting of a dual-axis servo motor, threaded rod, threaded block, and push rod, as well as a longitudinal adjustment module that drives the lifting and lowering of the mounting platform via a cylinder. This allows the buffer rack to accurately and automatically adapt to rolls of different lengths and diameters. Operators only need to input parameters through the controller to automatically adjust the width and height of the buffer rack, greatly improving the equipment's adaptability to rolls of different specifications. This avoids the hassle of frequently changing or adjusting tooling due to product changes, and significantly improves space utilization and production flexibility.

[0014] 2. This angle-fixed buffer rack, adaptable to multiple sizes of collecting drums, utilizes a constraint mechanism composed of a worm gear, worm wheel, gear, rack, connecting rod, and constraint blocks. This mechanism not only achieves synchronous, opposite-direction movement of the two constraint blocks through gear and rack transmission, tightly gripping the collecting drum shaft with its curved surface, but more importantly, it employs a self-locking worm gear pair. This effectively prevents the collecting drum from rotating or shifting during storage or under external force, fundamentally eliminating the risk of rolling and ensuring the positional accuracy and stability of materials during buffering and subsequent AGV loading / unloading processes. This significantly reduces wear and safety hazards caused by displacement.

[0015] 3. This angle-fixed buffer frame, which can adapt to multiple sizes of drums, provides a stable foundation through a symmetrically distributed frame. The coordinating rods connecting the support rods on both sides and the mounting cylinder ensure synchronicity and overall rigidity during lateral adjustment. The triangular reinforcing block at the bottom of the mounting platform further enhances the stability of the lifting movement. Under the coordination of the controller, the entire system enables the two major functional mechanisms of size adjustment and angle constraint to work together efficiently, realizing a fully integrated operation from size self-adaptation to angle locking. This not only simplifies manual operation steps and reduces labor intensity, but also ensures the repeatability and durability of the equipment during long-term use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of another axial integral structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the mounting box of the present invention; Figure 4 This is a schematic diagram of the internal structure of the frame of the present invention; Figure 5 This is a partial structural diagram of the connection between the support rod and the cooperating rod of the present invention; Figure 6 This is an enlarged view of point A in the figure of this invention; Figure 7 This is a schematic diagram of the installation platform and related parts of the present invention; Figure 8 This is a schematic diagram of the adjustment mechanism of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1. Rack; 2. Controller; 3. Adjustment mechanism; 301. Mounting box; 302. Dual-axis servo motor; 303. Threaded rod; 304. Threaded block; 305. Push rod; 306. Cylinder; 307. Mounting platform; 308. Support rod; 309. Coordinating rod; 310. Mounting cylinder; 4. Constraint mechanism; 401. Protective box; 402. Rotating shaft; 403. Worm gear; 404. Worm wheel; 405. Gear; 406. Rack plate; 407. Connecting rod; 408. Constraint block. Detailed Implementation

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Example

[0019] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, an angle-fixed buffer frame adaptable to multiple sizes of collection drums includes a frame 1 and a controller 2. An adjustment mechanism 3 is provided on the frame 1, and a constraint mechanism 4 is provided on the adjustment mechanism 3. The adjustment mechanism 3 is responsible for adapting to collection drums of different sizes, and the constraint mechanism 4 is responsible for fixing the angle of the collection drum. The two work together to achieve the core objectives of adaptability to multiple sizes and angle fixation. The adjustment mechanism 3 includes a mounting box 301. A dual-axis servo motor 302 is fixedly connected inside the mounting box 301. Threaded rods 303 are fixedly connected to both output shafts of the dual-axis servo motor 302. Threaded blocks 304 are threadedly connected to the outer sides of the threaded rods 303. Push rods 305 are fixedly connected to the outer sides of the threaded blocks 304. The dual-axis servo motor 302 can synchronously drive the two threaded rods 303 to rotate, ensuring the synchronization and precise control of the movements. The rotational motion of the dual-axis servo motor 302 is converted into the linear motion of the threaded blocks 304 through the threaded pair formed by the threaded rods 303 and the threaded blocks 304. This linear motion, in turn, pushes the entire frame 1 via the push rod 305, achieving automatic and precise adjustment of the overall width of the buffer rack to adapt to the length of the winding drum. A cylinder 306 is fixedly connected inside the frame 1. The output end of the cylinder 306 is fixedly connected to a mounting rod 305. Platform 307 has a support rod 308 fixedly connected to its top. Cylinder 306 serves as the power source, driving the platform 307 to rise and fall, thereby causing the support rod 308 and the entire constraint mechanism 4 to move together. This allows the buffer frame to adapt to drums of different diameters, and by adjusting the height, it ensures that the central axis of drums of various diameters is always kept at a suitable operating height. A coordinating rod 309 is detachably installed on the outside of the support rod 308. An installation cylinder 310 is sleeved on the outside of the coordinating rod 309. The coordinating rod 309 and the installation cylinder 310 form a linkage structure. When the spacing of the support rods 308 on both sides changes due to lateral adjustment, the coordinating rod 309 can slide in the installation cylinder 310, ensuring the mechanical synchronization and structural stability of the left and right sides during movement. At the same time, its detachable design facilitates installation and maintenance.

[0020] like Figure 1 and Figure 2 As shown, there are two racks 1, which are symmetrically distributed from left to right. The symmetrically distributed racks 1 provide a stable and balanced support base. The controller 2 is fixedly connected to the front side of the left rack 1. The controller 2 is connected to the dual-axis servo motor 302 and the cylinder 306 respectively. The mounting box 301 is located between the two racks 1. The controller 2 centrally controls the dual-axis servo motor 302 and the cylinder 306, realizing the automation and intelligence of the entire adjustment process. The operator can complete all size adaptation operations through the controller 2, which greatly improves the convenience and work efficiency of the equipment.

[0021] like Figure 3As shown, each of the two threaded rods 303 has a thread section, the two thread sections are of equal length and opposite direction. Limit blocks are fixedly connected to the upper and lower sides of the threaded block 304. Limit grooves that are adapted to the movement trajectory of the limit blocks are fixedly connected to the upper and lower sides of the inner wall of the mounting box 301. The design of the opposite thread direction ensures that when the dual-axis servo motor 302 rotates, the two threaded blocks 304 can move synchronously towards or away from each other, thereby realizing the precise and symmetrical adjustment of the spacing of the support rods 308. The cooperation between the limit blocks and the limit grooves effectively prevents the threaded blocks 304 from rotating with the threaded rods 303, ensuring that they only make precise linear movements, thus improving the transmission accuracy and reliability.

[0022] like Figure 2 and Figure 3 As shown, push rod 305 is fixedly connected to the opposite sides of two threaded blocks 304. Two push rods 305 are fixedly connected to the outer side of each threaded block 304 and are symmetrically distributed on the upper and lower sides of the threaded rod 303. The side of the push rod 305 away from the threaded block 304 is fixedly connected to the frame 1. Each threaded block 304 is connected to the frame 1 through two push rods 305 arranged symmetrically on the upper and lower sides. Through the symmetrical two-point thrust transmission method, the thrust distribution is more uniform, avoiding the off-center load and jamming that may occur when the force is applied to a single point, and ensuring the smoothness and stability of the entire lateral adjustment process.

[0023] like Figure 2 , Figure 4 and Figure 5 As shown, the bottom of the mounting platform 307 is fixedly connected to a reinforcing block that is slidably connected to the outside of the frame 1. The reinforcing block has a triangular design, and there are two cooperating rods 309, which are symmetrically distributed between the two support rods 308 on the left and right. The triangular reinforcing block enhances the rigidity and stability of the connection between the mounting platform 307 and the frame 1, preventing it from shaking or tilting during the lifting process. The two cooperating rods 309 are symmetrically arranged on the left and right sides, which further strengthens the linkage of the double-sided mechanism and the rigidity of the overall structure, ensuring the consistency of the action.

[0024] like Figure 5 and Figure 6 As shown, T-shaped blocks are fixedly connected to both the upper and lower sides of the coordinating rod 309. T-shaped grooves that match the movement trajectory of the T-shaped blocks are opened on both the upper and lower sides of the inner wall of the mounting cylinder 310. The sliding fit between the T-shaped blocks and the T-shaped grooves ensures that the coordinating rod 309 can slide freely in the mounting cylinder 310 to achieve the linkage function, and also prevents the coordinating rod 309 from coming out of the mounting cylinder 310, thereby improving the safety and durability of the linkage structure.

[0025] like Figure 2 , Figure 7 and Figure 8As shown, the constraint mechanism 4 includes a protective box 401. A rotating shaft 402 is rotatably connected between the upper and lower sides of the inner wall of the protective box 401. A worm gear 403 extending to the outer side of the inner wall of the protective box 401 is rotatably connected. A worm wheel 404 and a gear 405 are fixedly connected to the outer side of the rotating shaft 402. A rack plate 406 that meshes with the gear 405 is slidably connected inside the protective box 401. A connecting rod 407 is fixedly connected to the outer side of the rack plate 406. A connecting rod 407 is fixedly connected to the side of the connecting rod 407 away from the rack plate 406. The constraint block 408 drives the worm gear 404 and the rotating shaft 402 to rotate by rotating the worm 403. The rotating shaft 402 then drives the gear 405 to rotate, and the gear 405 drives the rack plates 406 on both sides to move in opposite directions in a straight line. Finally, the connecting rod 407 drives the two constraint blocks 408 to move closer or further away synchronously. The worm gear 403-worm gear 404 pair has a self-locking characteristic, which can effectively prevent the constraint block 408 from moving in the opposite direction when subjected to the force of the winding drum, thus ensuring the reliability and safety of the angle constraint.

[0026] like Figure 8 As shown, the protective box 401 is fixedly connected to the top of the mounting platform 307. Fixing the protective box 401 to the liftable mounting platform 307 allows the constraint mechanism 4 to move synchronously with the height adjustment. The worm gear 403 meshes with the worm wheel 404, and the gear 405 is located above the worm wheel 404. There are two rack plates 406, which are symmetrically distributed on both sides of the gear 405. The top of the rack plate 406 is fixedly connected to a transmission rod that is slidably connected to the inner top wall of the protective box 401. The symmetrically distributed rack plates 406 ensure the synchronicity of the movement of the two constraint blocks 408. The sliding connection between the transmission rod and the inner top wall of the protective box 401 provides additional guidance and support for the rack plate 406, ensuring that its movement trajectory is accurate and does not deviate or tilt.

[0027] like Figure 7 and Figure 8 As shown, there are two connecting rods 407, which are fixedly connected to the opposite sides of the two rack plates 406. The connecting rods 407 extend to the outside of the protective box 401. Both sides of the protective box 401 are provided with clearance holes that are adapted to the movement trajectory of the connecting rods 407. The clearance holes provide a smooth movement path for the connecting rods 407. The constraint block 408 is slidably connected to the top surface of the protective box 401, which further enhances its movement stability. The opposite sides of the two constraint blocks 408 are designed with arc surfaces, which allows them to better fit and hold the cylindrical winding drum head, increasing the contact area and thus providing a more stable angle fixing effect.

[0028] During use, the operator inputs the target roll specifications through controller 2. Upon receiving the instruction, controller 2 first coordinates the adjustment mechanism 3 to perform a size adaptation action: the dual-axis servo motor 302 located in the mounting box 301 is started, and its two output shafts synchronously drive two threaded rods 303 with opposite screw directions to rotate. Through the threaded blocks 304 that mesh with the threaded rods 303, the rotational motion of the dual-axis servo motor 302 is converted into the horizontal movement of the threaded blocks 304. Each threaded block 304 is then moved horizontally by two push rods 3 arranged symmetrically above and below. 05. The force is evenly and smoothly transmitted to the symmetrically distributed frames 1 on the left and right sides, so that the two frames 1 can move synchronously towards or away from each other, thereby precisely adjusting the support width of the entire buffer frame to match the length of the winding drum. During this lateral adjustment, the coordinating rod 309 connected between the two support rods 308 slides in the mounting cylinder 310. Through the cooperation of the T-shaped block on it and the T-shaped groove in the mounting cylinder 310, the mechanical synchronization and overall rigidity of the double-sided mechanism are ensured, and disengagement is prevented. At the same time, in order to match the diameter of the winding drum, the controller 2 synchronously controls... When cylinder 306 is activated, it pushes the mounting platform 307 to rise and fall vertically, thereby driving the support rod 308 fixed thereon and the entire constraint mechanism 4 to the predetermined height. This ensures that the center lines of the winding drums of different diameters can be maintained at the same horizontal operating height. After the size adjustment is completed, the workflow enters the angle fixing stage: the operator manually or through the drive device rotates the worm gear 403 of the constraint mechanism 4. The worm gear 403 drives the worm wheel 404 meshing with it to rotate, and the worm wheel 404 drives the coaxial rotating shaft 402 and the gear 405 fixed thereon to rotate. Rotating together, gear 405 simultaneously drives rack plates 406 meshing with it on both sides to move in opposite or opposite linear motions. The movement of rack plates 406 is transmitted to constraint blocks 408 through connecting rod 407. Finally, the two constraint blocks 408 slide synchronously closer to each other on the top surface of protective box 401, and tightly fit and hug the shaft head of the collection drum with its arc surface design. The self-locking characteristics of worm gear 403-worm wheel 404 pair are used to reliably lock its circumferential angle, completing the entire buffering process and effectively preventing the collection drum from rolling and shifting during storage and AGV retrieval.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An angle-fixed buffer frame adaptable to multi-size collection drums, comprising a frame (1) and a controller (2), characterized in that: An adjustment mechanism (3) is provided on the frame (1), and a constraint mechanism (4) is provided on the adjustment mechanism (3). The adjustment mechanism (3) includes a mounting box (301), a dual-axis servo motor (302) is fixedly connected inside the mounting box (301), threaded rods (303) are fixedly connected to both output shafts of the dual-axis servo motor (302), threaded blocks (304) are threadedly connected to the outer side of the threaded rods (303), and push rods (305) are fixedly connected to the outer side of the threaded blocks (304). A cylinder (306) is fixedly connected inside the frame (1), and a mounting platform (307) is fixedly connected to the output end of the cylinder (306). A support rod (308) is fixedly connected to the top of the mounting platform (307), and a cooperating rod (309) is detachably installed on the outer side of the support rod (308). A mounting sleeve (310) is sleeved on the outer side of the cooperating rod (309).

2. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: The number of the racks (1) is two and they are symmetrically distributed on the left and right. The controller (2) is fixedly connected to the front side of the left rack (1). The controller (2) is connected to the dual-axis servo motor (302) and the cylinder (306) respectively. The mounting box (301) is located between the two racks (1).

3. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: Both threaded rods (303) are provided with a thread, the two thread sections are of equal length and opposite direction, and limit blocks are fixedly connected to the upper and lower sides of the threaded block (304). Limiting grooves that are adapted to the moving trajectory of the limit blocks are fixedly connected to the upper and lower sides of the inner wall of the mounting box (301).

4. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: The push rod (305) is fixedly connected to the opposite sides of the two threaded blocks (304). Two push rods (305) are fixedly connected to the outer side of each threaded block (304) and are symmetrically distributed on the upper and lower sides of the threaded rod (303). The side of the push rod (305) away from the threaded block (304) is fixedly connected to the frame (1).

5. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: The bottom of the installation platform (307) is fixedly connected to a reinforcing block that is slidably connected to the outside of the frame (1). The reinforcing block is triangular in design. There are two cooperating rods (309) that are symmetrically distributed between the left and right support rods (308).

6. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: The upper and lower sides of the coordinating rod (309) are fixedly connected with T-shaped blocks, and the upper and lower sides of the inner wall of the mounting cylinder (310) are provided with T-shaped grooves that are adapted to the moving trajectory of the T-shaped blocks.

7. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 1, characterized in that: The constraint mechanism (4) includes a protective box (401), a rotating shaft (402) is rotatably connected between the upper and lower sides of the inner wall of the protective box (401), a worm gear (403) extending to the outer side of the inner wall of the protective box (401) is rotatably connected, a worm wheel (404) and a gear (405) are fixedly connected to the outer side of the rotating shaft (402), a rack plate (406) that meshes with the gear (405) is slidably connected inside the protective box (401), a connecting rod (407) is fixedly connected to the outer side of the rack plate (406), and a constraint block (408) is fixedly connected to the side of the connecting rod (407) away from the rack plate (406).

8. The angle-fixed buffer frame adaptable to multi-size collection drums according to claim 7, characterized in that: The protective box (401) is fixedly connected to the top of the mounting platform (307). The worm (403) meshes with the worm wheel (404). The gear (405) is located above the worm wheel (404). There are two rack plates (406) symmetrically distributed on both sides of the gear (405). The top of the rack plate (406) is fixedly connected to a transmission rod that is slidably connected to the inner top wall of the protective box (401).

9. A variable angle-fixed buffer frame adaptable to multi-size collection drums according to claim 7, characterized in that: There are two connecting rods (407) and they are fixedly connected to the opposite sides of the two rack plates (406). The connecting rods (407) extend to the outside of the protective box (401). Both sides of the protective box (401) are provided with clearance holes that are adapted to the movement trajectory of the connecting rods (407). The constraint blocks (408) are slidably connected to the top surface of the protective box (401). The opposite sides of the two constraint blocks (408) are designed with arc surfaces.