Logistics loading machine with accurate positioning structure

Abstract

The present application relates to the technical field of logistics loading machine, in particular to a logistics loading machine with precise positioning structure. It comprises a machine body, the end of the machine body is provided with a moving rail, the surface of the moving rail is provided with a base frame, the base frame moves on the surface of the moving rail in the vertical direction, the end of the moving arm is provided with a support seat, and the lower part of the support seat is provided with a pressing assembly. When the machine body drives the base frame to move horizontally during loading, the pressing disc extrudes the end of the lower box to be placed, so that the lower box always maintains a stable state. The pressing disc is driven to slide in the inner wall of the cylinder by the pressure, and when the sliding rod moves, the wedge block at the top of the moving rod extrudes the bottom of the return spring, so that the rack moves vertically to drive the fixed gear to rotate, the fixed gear end is provided with a lead screw, the moving arm drives the support seat to move in the opposite direction, and the box placed on the surface of the roller is automatically unloaded and loaded, so as to avoid safety hazards.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics loading machine, in particular, to a logistics loading machine with precise positioning structure. BACKGROUND

[0002] With the improvement of modern mechanization degree, and the popularity of unmanned factory, intelligent factory, more and more enterprises adopt loading equipment to stack goods into the car or container, so as to improve the efficiency of goods stacking and reduce labor costs.

[0003] There are many existing technologies for loading machine devices, for example:

[0004] Chinese patent publication No. CN108455314A discloses a logistics loading machine, which comprises a horizontal hollow box body, a mounting seat, a lifting hydraulic cylinder and a logistics disc. Each corner of the bottom of the logistics disc is provided with a roller in contact with the top of the horizontal hollow box body. The inner cavity of the horizontal hollow box body is fixed with a guide rail at the bottom, and a horizontal rack is fixed in the horizontal direction. A motor is arranged in the inner cavity of the horizontal hollow box body. The output shaft of the motor is fixed with a gear engaged with the horizontal rack. The bottom of the motor is fixed with a motor base, and the bottom of the motor base is fixed with a guide wheel connected with the guide rail in sliding mode. The top of the gear is fixed with a connecting shaft extending to the outside of the horizontal hollow box body. The top of the horizontal hollow box body is provided with a long slot for the sliding of the connecting shaft. The bottom of the horizontal hollow box body is fixed with a bearing, and the top end of the connecting shaft is connected with the inner ring of the bearing.

[0005] At present, in the process of using the traditional loading machine, when the box is loaded by the forklift, the position of the box placed on the fork arm is offset, which leads to the position offset during the stacking of the box, and the box needs to be adjusted twice by the operator, which leads to low loading efficiency. At the same time, during the stacking process of the box under the box to be loaded, the pressure is uneven, which is easy to make the whole stack of stacked boxes collapse, resulting in damage to the objects in the box.

[0006] Therefore, we propose a logistics loading machine with precise positioning structure. SUMMARY

[0007] The purpose of the present application is to provide a logistics loading machine with precise positioning structure to solve the problems raised in the background.

[0008] In order to achieve the above object, the present application aims to provide a logistics shipment loading machine with precise positioning structure, comprising a body, the end of the body is provided with a moving rail, the surface of the moving rail is provided with a base frame, the base frame moves on the surface of the moving rail in the vertical direction, the side of the base frame close to the moving rail is provided with a back plate, the inside of the base frame is provided with a lead screw, the surface thread of the lead screw is symmetrical, the center of the lead screw is provided with a fixed gear, the two sides of the surface of the lead screw are provided with a moving arm, the end of the moving arm is provided with a plurality of fixing holes, the fixing hole is provided with a support seat, the end of the moving arm is provided with a support seat, the lower side of the support seat is provided with a pressing assembly, the pressing assembly is used for placing the box to be stacked, and the box below the box to be stacked is fixed during the placing process, the two sides of the base frame are provided with a position adjusting assembly, the position adjusting assembly is used for pushing and positioning the box placed on the surface of the support seat, so that the box is at the center of the roller surface, the upper side of the pressing assembly is provided with a limiting assembly, the limiting assembly is used for pressing the top of the box automatically, so that the box is kept stable under stress during the moving and loading process.

[0009] As a further improvement of the technical solution, the surface of the support seat is provided with a groove, and a roller is arranged in the groove.

[0010] As a further improvement of the technical solution, the pressing assembly comprises a cylinder arranged at the bottom of the back plate, the cylinder is arranged in a symmetrical manner, a sliding rod is slidably arranged on the inner wall of the cylinder, a pressure plate is arranged at the end of the sliding rod, a compression spring is arranged between the cylinder and the sliding rod, and the pressure plate is in close contact with the surface of the box below the box to be stacked.

[0011] As a further improvement of the technical solution, a through slot is formed in the side wall of the cylinder, a moving rod is arranged between the ends of the sliding rod, a hemispherical block is arranged at the bottom of the moving rod, the sliding rod moves to drive the moving rod to slide in the inner wall of the cylinder, the moving rod moves to press the compression spring, and a wedge-shaped block is arranged at the top of the compression spring.

[0012] As a further improvement of the technical solution, a rack is arranged above the wedge-shaped block, the rack is engaged with the side edge of the fixed gear, the fixed gear rotates when the rack is pushed to move vertically upward, and a return spring is arranged between the rack and the base frame.

[0013] As a further improvement of the technical solution, the position adjusting assembly comprises a rotating arm arranged on the outer wall of the base frame, a gas cylinder is arranged at the end of the rotating arm, and a push plate is arranged at the end of the piston rod of the gas cylinder.

[0014] As a further improvement of the technical solution, a servo motor is arranged on the side wall of the back plate, a worm is arranged at the output end of the servo motor, a worm gear is arranged below the worm, rotating shaft rods are arranged on the two sides of the worm gear, and a transmission belt is arranged between the rotating shaft rods and the rotating arm.

[0015] As a further improvement of the technical solution, the limiting assembly comprises an extension plate arranged above the roller, a support column is arranged at the bottom of the extension plate, a pressing rod is slidably arranged in the inner wall of the support column, an elastic member is arranged between the support column and the pressing rod, and the height of the pressing rod is lower than the height of the shipping box placed on the surface of the support seat in a natural state.

[0016] As a further improvement of the technical solution, a winding shaft is arranged on the surface of the extension plate, a pull rope is arranged between the winding shaft and the pressing rod, a ratchet wheel is arranged on one side of the winding shaft, the winding shaft penetrates through the ratchet wheel at the end and a secondary gear is arranged at the end, a rotating motor is arranged between the extension plates, a main gear is arranged at the output end of the rotating motor, and the main gear rotates to drive the secondary gears on both sides of the top to rotate.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. In the logistics shipping loading machine with precise positioning structure, the box to be loaded is placed on the surface of the support seat, the box to be loaded is pushed to slide on the surface of the roller, the piston rod at the end of the cylinder drives the push plate to push the box, and the box is horizontally placed on the surface of the roller. During the stacking of the box, the lower box is prevented from falling due to uneven stress, the goods in the box are prevented from being damaged due to collision, and the safety of the box loading is improved.

[0019] 2. In the logistics shipping loading machine with precise positioning structure, when the machine body drives the base frame to move horizontally for loading, the pressing plate extrudes the end of the box below the box to be placed, so that the lower box always maintains a stable state. The pressing plate is driven to slide in the inner wall of the cylinder by the pressure, and the wedge block at the top of the moving rod is extruded by the bottom of the reset spring when the moving rod moves, so that the rack moves vertically to drive the fixed gear to rotate, the fixed gear end is provided with a lead screw, and the moving arm drives the support seat to move in the opposite direction. The box placed on the surface of the roller is automatically unloaded and loaded, the convenience of loading is improved, the stacked boxes during loading are kept stable, and safety hazards are avoided.

[0020] 3. In the logistics shipping loading machine with precise positioning structure, the pressing rod is always pressed against the top of the box to be loaded by the elastic member, the top of the box is pressed, and the position of the box is in a limiting state. The movement of the box to be loaded on the surface of the roller causes the position to deviate, which requires secondary adjustment of the stacking position, and the efficiency of loading and stacking is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0022] Figure 2 It is a schematic diagram of the base frame structure of the present application.

[0023] Figure 3 Figure is the schematic view of the support seat structure of the present application;

[0024] Figure 4 Figure is the schematic view of the pressing assembly structure of the present application;

[0025] Figure 5 Figure is the schematic view of the position adjusting assembly structure of the present application Figure 4

[0026] Figure 6 Figure is the schematic view of the position adjusting assembly structure of the present application

[0027] Figure 7 Figure is the sectional view of the limiting assembly of the present application;

[0028] Figure 8 Figure is the schematic view of the position adjusting assembly structure of the present application Figure 7

[0029] The meanings of the respective numbers in the figures are as follows:

[0030] 100, machine body; 101, moving track;

[0031] 200, base frame; 201, screw rod; 202, moving arm; 203, support seat; 204, roller; 205, back plate; 206, fixed gear;

[0032] 300, pressing assembly; 301, cylinder; 302, sliding rod; 303, pressing plate; 304, compression spring; 305, moving rod; 306, wedge block; 307, rack; 308, return spring;

[0033] 400, position adjusting assembly; 401, servo motor; 402, worm; 403, worm gear; 404, rotating shaft; 405, transmission belt; 406, rotating arm; 407, air cylinder; 408, pushing plate;

[0034] 500, limiting assembly; 501, support column; 502, pressing rod; 503, elastic member; 504, winding shaft; 505, pulling rope; 506, rotating motor; 507, main gear; 508, auxiliary gear; 509, ratchet wheel. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0036] ​​In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] The present embodiment aims to provide a logistics loading machine with precise positioning structure, as shown in Figures 1-8 The machine body 100 is provided with a moving rail 101 at the end, and the surface of the moving rail 101 is provided with a base frame 200 which moves vertically on the surface of the moving rail 101. The base frame 200 is provided with a back plate 205 close to one side of the moving rail 101. The inside of the base frame 200 is provided with a lead screw 201, the surface of which is symmetrically threaded. The center of the lead screw 201 is provided with a fixed gear 206. The surface of the lead screw 201 is provided with a moving arm 202 on both sides. The end of the moving arm 202 is provided with a plurality of fixing holes. The fixing holes are provided with a support seat 203. The end of the moving arm 202 is provided with a support seat 203. The support seat 203 is provided with a pressing assembly 300 below. The pressing assembly 300 is used to place the box to be stacked and fix the box below during the placement process. The base frame 200 is provided with a position adjusting assembly 400 on both sides. The position adjusting assembly 400 is used to push and position the box placed on the surface of the support seat 203, so that the box is at the center of the surface of the roller 204. The pressing assembly 300 is provided with a limiting assembly 500 above. The limiting assembly 500 is used to automatically press the top of the box, so that the box remains stable under stress during the moving and loading process.

[0038] The improvement of the present embodiment is that when the machine body 100 drives the base frame 200 to move horizontally, the pressing disc 303 extrudes the end of the box below the box to be placed, so that the box below always remains in a stable state. The pressing disc 303 is driven to slide in the inner wall of the cylinder 301 by the pressure, and the sliding rod 302 drives the wedge block 306 at the top of the moving rod 305 to extrude the bottom of the return spring 308 when the sliding rod 302 moves, so that the rack 307 moves vertically to drive the fixed gear 206 to rotate, so that the lead screw 201 provided at the end of the fixed gear 206 rotates, and the moving arm 202 drives the support seat 203 to move in the opposite direction, automatically unloading the box placed on the surface of the roller 204, improving the convenience of loading, keeping the stacked boxes stable during loading, and avoiding safety hazards.

[0039] In the process of loading the box in logistics, the bottom of the box is attached to the bottom of the supporting seat 203, and the box is subjected to a large friction force on the surface of the supporting seat 203 during unloading, thereby causing inconvenience in unloading the box. Therefore, grooves are formed on the surface of the supporting seat 203, and roller shafts 204 are arranged in the grooves. The roller shafts 204 are arranged in a row. By placing the box on the surface of the roller shafts 204 and moving the box to the placement position, the roller shafts 204 are moved to the sides, and the box is slid off the surface of the roller shafts 204 and placed on the surface of the stacked box, thereby facilitating the rapid loading and unloading of the box.

[0040] In the process of loading the box, when the lower box is subjected to uneven stress during stacking, the entire stack is prone to collapse. Therefore, the pressing assembly 300 includes a cylindrical barrel 301 arranged on the bottom of the back plate 205. The cylindrical barrel 301 is arranged symmetrically, and a sliding rod 302 is slidably arranged on the inner wall of the cylindrical barrel 301. The end of the sliding rod 302 is provided with a pressing disc 303. A compression spring 304 is arranged between the cylindrical barrel 301 and the sliding rod 302. The pressing disc 303 is attached to and pressed against the surface of the lower box. During the loading and stacking process, the moving body 100 drives the supporting seat 203 and the box to the appropriate position. The base frame 200 moves horizontally to drive the pressing disc 303 to move. The pressing disc 303 presses the end of the lower box to be stacked. The end of the pressing disc 303 is attached to the end of the box to fix it. When the box is placed above it, the box can always be in a stable state, thereby improving the stability of the box.

[0041] In the process of goods shipment, in order to improve the loading efficiency, therefore, the side wall of the column cylinder 301 is provided with a through groove, the moving rod 305 is arranged between the end portions of the sliding rod 302, the sliding rod 302 moves to drive the moving rod 305 to slide in the inner wall of the column cylinder 301, the moving rod 305 moves to extrude the compression spring 304, the wedge block 306 is arranged at the top of the compression spring 304, the rack 307 is arranged above the wedge block 306, the rack 307 is engaged with the side edge of the fixed gear 206, the rack 307 is driven to move vertically upward to drive the fixed gear 206 to rotate, the reset spring 308 is arranged between the rack 307 and the base frame 200, in the process of loading, the size of the box is obtained, the relative position of the support seat 203 at the fixed hole of the end portion of the moving arm 202 is adjusted, the bottom of the box is placed in close contact with the surface of the support seat 203, in the process of loading, the base frame 200 is driven to move horizontally by the moving body 100, the end portion of the compression plate 303 is extruded and in close contact with the box below the box to be placed, when the moving body 100 continues to move, the compression plate 303 is driven to slide in the inner wall of the column cylinder 301 by the reverse force, the sliding rod 302 moves to drive the moving rod 305 to slide, the wedge block 306 at the top of the moving rod 305 pushes the hemispherical block at the bottom of the rack 307 to move, the rack 307 moves vertically upward to drive the fixed gear 206 to rotate, the lead screw 201 rotates coaxially with the fixed gear 206, the moving arm 202 moves away from the lead screw 201, the box to be placed on the surface of the roller 204 is automatically stacked on the surface of the box, thereby improving the loading efficiency.

[0042] In the process of loading the box, in order to avoid the position deviation of the box placed on the surface of the roller 204, in the process of stacking the box, the lower box is unevenly stressed, the whole stack of boxes is fallen, the goods in the box are damaged, therefore, the position adjusting assembly 400 comprises the rotating arm 406 arranged on the outer wall of the base frame 200, the rotating arm 406 is provided with the air cylinder 407 at the end portion, the piston rod at the end portion of the air cylinder 407 penetrates the rotating arm 406 and is provided with the push plate 408 at the end portion, when the box is placed on the surface of the roller 204, the piston rod at the end portion of the air cylinder 407 drives the push plate 408 to push the box, so that the box is horizontally placed on the surface of the roller 204, in the process of stacking the box, the lower box is not unevenly stressed and fallen, the goods in the box are not damaged by collision, thereby improving the safety of the box loading.

[0043] In the process of loading the box, the rotating arm 406 affects the loading path of the support base 203, so the back plate 205 side wall is provided with a servo motor 401, the output end of the servo motor 401 is provided with a worm 402, the lower side of the worm 402 is provided with a worm gear 403, the two sides of the worm gear 403 are provided with rotating shaft rods 404, and the rotating shaft rods 404 and the rotating arm 406 are provided with a transmission belt 405. When the position adjustment of the box is completed, the output end of the servo motor 401 drives the worm 402 to rotate, the worm gear 403 meshing rotating is arranged below the worm 402, the worm gear 403 drives the coaxial rotation of the rotating shaft rods 404 on both sides, and the rotating shaft rods 404 drive the rotating arm 406 to rotate 180° through the transmission belt 405 when rotating, thereby avoiding the rotating arm 406 from hindering the loading path when the support base 203 loads the box, and improving the loading efficiency.

[0044] When the box is placed on the surface of the support base 203, the box is easy to shake when the base frame 200 vertically moves at the end of the moving rail 101, which causes a safety hazard. Therefore, the limiting assembly 500 includes an extension plate arranged above the roller 204, the bottom of the extension plate is provided with a support column 501, the inner wall of the support column 501 is slidably provided with a pressing rod 502, and the support column 501 and the pressing rod 502 are provided with an elastic member 503. In the natural state, the height of the pressing rod 502 is lower than the height of the box placed on the surface of the support base 203 for loading and transportation. When the moving body 100 drives the base frame 200 to move horizontally, the box is placed on the surface of the roller 204, and the end of the box to be loaded pushes the pressing rod 502 to be extruded. The pressing rod 502 slides in the inner wall of the support column 501 under the external extrusion force and extrudes the elastic member 503. When the box is completely placed on the surface of the roller 204, the pressing rod 502 applies pressure to the top of the box under the action of the elastic member 503, so that the box moves in the vertical direction and is loaded, thereby ensuring the stability of the box and avoiding safety hazards. At the same time, when the box to be loaded is stacked, the moving body 100 drives the base frame 200 to move horizontally when the box is pushed to slide on the surface of the roller 204, the pressing disc 303 extrudes the box below the box to be placed, the pressing disc 303 is driven to slide in the inner wall of the cylinder 301 under the pressure, the sliding rod 302 drives the wedge block 306 at the top of the moving rod 305 to extrude the bottom of the return spring 308 when moving, the vertical movement of the rack 307 drives the fixed gear 206 to rotate, the screw rod 201 arranged at the end of the fixed gear 206 rotates, the moving arm 202 drives the support base 203 to move in the direction away from each other, and the box placed on the surface of the roller 204 is unloaded. When the support base 203 moves away from each other, the pressing rod 502 always presses the top of the box to be loaded under the action of the elastic member 503, thereby limiting the position of the box, avoiding the position deviation of the box to be loaded when moving on the surface of the roller 204, and improving the efficiency of loading and stacking.

[0045] In view of the different sizes of the boxes in different batches during the device process, in order to facilitate the stability of the boxes of different sizes during loading, the surface of the extension plate is provided with a winding shaft 504, the winding shaft 504 and the pressing rod 502 are provided with a pull rope 505, one side of the winding shaft 504 is provided with a ratchet wheel 509, the end of the winding shaft 504 penetrates the ratchet wheel 509 and is provided with a secondary gear 508 at the end, the extension plate is provided with a rotating motor 506, the output end of the rotating motor 506 is provided with a main gear 507, the main gear 507 rotates to drive the secondary gear 508 on both sides of the top to rotate, the output end of the rotating motor 506 drives the main gear 507 to rotate, so that the secondary gear 508 on both sides of the top of the main gear 507 is engaged and rotated, the secondary gear 508 rotates to drive the winding shaft 504 to rotate, the winding shaft 504 winds the pull rope 505 provided at the end of the pressing rod 502, so as to adjust the height of the pressing rod 502, the ratchet wheel 509 is used to fix the winding adjusted pull rope 505, which is convenient for limiting the loading of boxes of different sizes and guarantees the stability of the boxes to be loaded.

[0046] In summary, the working principle of the present application is as follows: in specific use, the box to be loaded is placed on the surface of the support seat 203, the box to be loaded is pushed to slide on the surface of the roller 204, the piston rod at the end of the air cylinder 407 drives the push plate 408 to push the box, so that the box is horizontally placed on the surface of the roller 204, and in the process of stacking the box, the lower box is prevented from falling due to uneven stress, the goods in the box are prevented from being damaged due to collision, and the safety of loading the box is improved.

[0047] When the machine body 100 drives the base frame 200 to move horizontally for loading, the pressing disc 303 extrudes the end of the box below the box to be placed, so that the lower box always maintains a stable state, the sliding rod 302 slides in the inner wall of the cylinder 301 under the pressure of the pressing disc 303, the wedge block 306 at the top of the moving rod 305 extrudes the bottom of the reset spring 308 when the sliding rod 302 moves, the vertical movement of the rack 307 drives the fixed gear 206 to rotate, the rotation of the fixed gear 206 drives the lead screw 201 provided at the end of the fixed gear 206 to rotate, the moving arm 202 drives the support seat 203 to move in the direction away from each other, automatically unloading the box placed on the surface of the roller 204 for loading, improving the convenience of loading, maintaining the stability of the stacked boxes during loading, and avoiding safety hazards; when the support seat 203 moves away from each other, the pressing rod 502 is always pressed against the top of the box to be loaded under the action of the elastic member 503, the top of the box is pressed, the position of the box is in a limiting state, the position deviation of the box to be loaded on the surface of the roller 204 is avoided, the second adjustment of the position of the stacked box is not needed, and the efficiency of loading and stacking is improved.

[0048] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A logistics loading and unloading machine with a precise positioning structure, characterized in that: Includes a body (100), with a moving rail (101) at one end. A base frame (200) is provided on the surface of the moving rail (101), and the base frame (200) moves vertically on the surface of the moving rail (101). A back plate (205) is provided on the side of the base frame (200) near the moving rail (101). A lead screw (201) is provided inside the base frame (200), with symmetrical threads on its surface. A fixed gear (206) is provided at the center of the lead screw (201). 1) Movable arms (202) are provided on both sides of the surface. Multiple fixing holes are provided at the ends of the movable arms (202). Support seats (203) are provided at the fixing holes. Support seats (203) are provided at the ends of the movable arms (202). Pressing components (300) are provided below the support seats (203). Pressing components (300) are used to place the boxes to be stacked and to fix the boxes below the boxes to be stacked during the placement process. Pressing components (300) include a column (301) provided at the bottom of the back plate (205). The column (301) is symmetrically arranged. A sliding rod (302) is slidably provided on the inner wall of the column (301). A pressure plate (303) is provided at the end of the sliding rod (302). A compression spring (304) is provided between the column (301) and the sliding rod (302). The pressure plate (303) is pressed against the surface of the box to be stacked. A through groove is opened on the side wall of the column (301). A moving rod (305) is provided between the ends of the sliding rod (302). A hemispherical block is provided at the bottom of the moving rod (305). The movement drives the moving rod (305) to slide on the inner wall of the column (301). When the moving rod (305) moves, it squeezes the compression spring (304). The compression spring (304) has a wedge block (306) on top and a rack (307) above the wedge block (306). The rack (307) meshes with the side of the fixed gear (206). When the rack (307) is pushed to move vertically upward, it drives the fixed gear (206) to rotate. A return spring (308) is provided between the rack (307) and the base frame (200). The base frame (200) is provided with position adjustment components (400) on both sides. The position adjustment components (400) are used to push and position the box placed on the surface of the support (203) so that the box is at the center of the surface of the roller (204). The pressing component (300) is provided with a limiting component (500) above it. The limiting component (500) is used to automatically press the top of the box so that the box remains stable under force during the moving and loading process.

2. The logistics loading and unloading machine with a precise positioning structure according to claim 1, characterized in that: The support base (203) has a groove on its surface, and a roller (204) is provided in the groove. The rollers (204) are arranged in a row.

3. The logistics loading and unloading machine with a precise positioning structure according to claim 1, characterized in that: The position adjustment assembly (400) includes a rotating arm (406) disposed on the outer wall of the base frame (200), and a cylinder (407) is provided at the end of the rotating arm (406). The piston rod at the end of the cylinder (407) passes through the rotating arm (406) and a push plate (408) is provided at the end.

4. The logistics loading and unloading machine with a precise positioning structure according to claim 3, characterized in that: The back plate (205) has a servo motor (401) on its side wall. The output end of the servo motor (401) has a worm gear (402). Below the worm gear (402) is a worm wheel (403). Rotating shafts (404) are provided on both sides of the worm wheel (403). A transmission belt (405) is provided between the rotating shafts (404) and the rotating arm (406).

5. The logistics loading and unloading machine with a precise positioning structure according to claim 1, characterized in that: The limiting component (500) includes an extension plate disposed above the roller (204), a support column (501) is provided at the bottom of the extension plate, a pressure rod (502) is slidably disposed on the inner wall of the support column (501), and an elastic element (503) is provided between the support column (501) and the pressure rod (502). In its natural state, the height of the pressure rod (502) is lower than the height of the transport box placed on the surface of the support seat (203).

6. The logistics loading and unloading machine with a precise positioning structure according to claim 5, characterized in that: The surface of the extension plate is provided with a roller shaft (504), and a pull rope (505) is provided between the roller shaft (504) and the pressure rod (502). A ratchet (509) is provided on one side of the roller shaft (504). The end of the roller shaft (504) passes through the ratchet (509) and is provided with a secondary gear (508). A rotating motor (506) is provided between the extension plates. The output end of the rotating motor (506) is provided with a main gear (507). The rotation of the main gear (507) drives the meshing secondary gears (508) on both sides of the top to rotate.

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