Automatic loading and unloading machine for automobile cargo

Abstract

The present invention provides an automatic loading and unloading machine for automobile cargo, which belongs to the technical field of cargo transportation equipment. It includes a plane action mechanism, a lifting mechanism, a bearing mechanism and a flipping mechanism; the bearing mechanism is used to bear cargo, the flipping mechanism is used to flip the components in the bearing mechanism vertically, the bearing mechanism is connected to the lifting mechanism, and the plane action mechanism is installed on the inner top wall of the vehicle compartment and is used to make the lifting mechanism and other mechanisms move arbitrarily in the horizontal direction in the compartment. After the cargo in the compartment is gradually filled from the inside to the outside, the second mounting frame is located at the position closest to the rear of the compartment, and the fork moves to the farthest position on the second mounting frame in the direction away from the front of the vehicle, and finally the flipping mechanism flips the part of the fork extending out of the second mounting frame upward, so that the fork can be stored close to the second mounting frame, reducing the occupied area of ​​the fork, and then the compartment door is closed, which has the effect of improving the effective storage rate of the space in the compartment.

Description

Technical Field

[0001] The present invention relates to the technical field of cargo transportation equipment, and in particular to an automatic loading and unloading machine for automobile cargo. Background Art

[0002] With the progress and development of society, the demand for various products in major fields such as corporate production and municipal construction continues to grow, requiring the logistics industry to provide a lot of support and at the same time enable the logistics industry to achieve substantial development.

[0003] The patent application publication number CN117142340A discloses an automatic loading and unloading mechanism and vehicle, including a traveling mechanism, a rotating mechanism, a grabbing mechanism, a telescopic mechanism, and a control mechanism. The telescopic mechanism has multi-stage telescopic and multi-angle rotation; the grabbing mechanism has forks with adjustable spacing and angles. The traveling mechanism includes a longitudinal track installed on the top wall of the carriage, which extends to the outside of the rear of the vehicle and can be folded. A transverse traveling mechanism is installed on the longitudinal track for movement. A sliding tray is installed along the width direction of the carriage through the transverse traveling mechanism. A fork for loading goods is installed under the sliding tray through a rotating mechanism and a telescopic mechanism, which rotates horizontally and telescopes vertically. After the goods are loaded with the fork, the fork containing the goods rotates, rises and falls, and moves in the carriage to place the goods at the designated position.

[0004] However, due to the complex and bulky structures of the rotating mechanism, telescopic mechanism, foldable longitudinal track and fork, even if the fork is retracted to its smallest volume in the car, each structure still occupies a large volume space, reducing the effective storage rate of the space in the car compartment. Summary of the invention

[0005] In view of the above problems in the prior art, the present invention provides an automatic loading and unloading machine for automobile cargo.

[0006] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0007] Provided is an automatic loading and unloading machine for automobile cargo, comprising a plane action mechanism, a lifting mechanism, a bearing mechanism and a turning mechanism;

[0008] The plane motion mechanism comprises a longitudinal slide rail, a transverse slide rail and a movable mounting frame, wherein the longitudinal slide rail is arranged on the top of the carriage along the length direction of the carriage, a first mounting frame is slidably arranged on the longitudinal slide rail, the transverse slide rail is arranged on the first mounting frame along the width direction of the carriage, and the movable mounting frame is slidably mounted on the transverse slide rail;

[0009] The lifting mechanism includes a second mounting frame and a telescopic sleeve, the telescopic sleeve is vertically connected to the bottom of the mobile mounting frame, the other end of the telescopic sleeve is connected to the second mounting frame, and the mobile mounting frame is provided with a first driving assembly for driving the second mounting frame to vertically lift and lower;

[0010] The bearing mechanism comprises a pair of forks symmetrically mounted on the second mounting frame, each fork comprises two movable sections, the two movable sections are relatively rotatably connected, and the turning mechanism is used to drive one movable section of the fork to turn upward.

[0011] Furthermore, a first rack is provided on the longitudinal slide rail along its length direction, a first drive motor is fixedly mounted on the first mounting frame, and an output shaft of the first drive motor is meshed with the first rack gear for transmission;

[0012] A second rack is arranged on the transverse slide rail along its length direction, a second drive motor is fixedly arranged on the mobile mounting frame, and an output shaft of the second drive motor is meshed with the second rack for transmission.

[0013] Furthermore, the first driving assembly includes a third driving motor and a screw lift, the screw of the screw lift is vertically arranged on the movable mounting frame, and the base of the screw lift and the third driving motor are both arranged on the second mounting frame.

[0014] Furthermore, the second mounting frame is door-shaped, and a passage for passing goods is provided on the second mounting frame along the length direction of the car body. The two forks are fixedly connected to a connecting rod at one end away from the front of the car, and the two forks are slidably arranged in the channel on the second mounting frame along the length direction of the car body. Third racks are provided on two movable sections of the two forks along the length direction of the car body, and a fourth drive motor is provided on the second mounting frame. The fourth drive motor is connected to the third rack gear on the fork, and a first limit portion for limiting the two movable sections from flipping downward more than 180° is provided below the hinge shaft on the two movable sections of each fork.

[0015] Furthermore, the first limiting portion includes a first limiting plate and a second limiting plate respectively fixed on the bottom walls of the two movable sections of the fork, and the second limiting plate is provided with a limiting groove near the first end of the first limiting plate. When the two movable sections of the fork rotate to be in the same line, the first limiting plate cooperates and abuts against the inner wall of the limiting groove.

[0016] Furthermore, a material blocking mechanism is provided on the second mounting frame, and the material blocking mechanism includes a blocking rod. A slider is provided in the channel of the second mounting frame for sliding along the vertical direction. The blocking rod is provided in the channel along the width direction of the carriage. Both ends of the blocking rod are fixedly connected to the slider. A first driving cylinder for driving the slider to vertically rise and fall is provided on the second mounting frame.

[0017] Furthermore, a Teflon coating is provided on the plane of the fork for contacting the cargo.

[0018] Furthermore, the flipping mechanism includes a flipping frame and a second driving cylinder. The flipping frame is rotatably arranged on a side of the second mounting frame away from the front of the car. The flipping frame is located below the shelf. The cylinder body of the second driving cylinder is rotatably connected to the second mounting frame, and the piston rod is rotatably connected to the flipping frame.

[0019] Furthermore, a second limit portion is provided on a side of the second mounting frame away from the front of the vehicle, and the second limit portion is located below the flip frame. The second limit portion is used to limit the movable end of the flip frame from rotating downward and perpendicular to the second mounting frame and then continuing to rotate.

[0020] Furthermore, a plurality of supporting rollers are arranged on the turning frame for parallel rotation, the axes of the supporting rollers are parallel to the width direction of the carriage, and the forks are in rolling contact with the supporting rollers.

[0021] The beneficial effects of the present invention are as follows: when the loader is loading goods, the fork moves to the compartment near the rear of the vehicle and is lowered to the lowest position, and the movable section of the fork away from the front of the vehicle is completely moved to the side of the second mounting frame away from the front of the vehicle. After the goods are manually placed on the fork, the second mounting frame moves to the specified position in the compartment with the action of the plane action mechanism under program control, and the second mounting frame is raised and lowered to the height at which the goods need to be placed, and the fork moves toward the front of the vehicle until the goods are completely located at the position where they need to be placed. By manual or mechanical interference, the goods are restricted to the current position, and the fork moves and is withdrawn from under the goods, thus completing the loading of the goods. After the cargo in the carriage is gradually filled from the inside to the outside, the second mounting frame is located closest to the rear of the carriage, and the cargo fork moves to the farthest position on the second mounting frame in the direction away from the front of the carriage. Finally, the flip mechanism flips the part of the cargo fork extending out of the second mounting frame upward, so that the cargo fork can be stored close to the second mounting frame, reducing the occupied area of ​​the cargo fork, and then the carriage door is closed, which increases the effective loading space in the carriage. The second mounting frame moves parallel to the carriage. Compared with the traditional structure, there is no need to rotate the direction of the cargo fork, which saves the space for making way during the rotation of the cargo fork, as well as the rotation action, thereby improving the stability of the cargo during loading and unloading and the loading and unloading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the automatic loading and unloading machine for cargo in a carriage according to an embodiment of the present application.

[0023] Figure 2 This is a schematic diagram of the structure of the fork in the moving state of an embodiment of the present application.

[0024] Figure 3 This is a schematic diagram of the structure of the fork in the flipped-up and tightened state of an embodiment of the present application.

[0025] Figure 4 for Figure 3 Enlarged schematic diagram of part A.

[0026] Among them, 1. plane action mechanism; 11. longitudinal slide rail; 111. first rack; 12. transverse slide rail; 121. second rack; 13. mobile mounting frame; 131. second drive motor; 14. first mounting frame; 141. first drive motor; 2. lifting mechanism; 21. second mounting frame; 211. channel; 212. fourth drive motor; 22. telescopic sleeve; 231. third drive motor; 232. screw lifter; 3. bearing mechanism; 31. fork; 311. third rack; 312. first limit plate; 313. second limit plate; 314. limit groove; 32. connecting rod; 4. turning mechanism; 41. turning frame; 42. second drive cylinder; 43. second limit part; 44. supporting roller; 5. material blocking mechanism; 51. blocking rod; 52. slider; 53. first drive cylinder. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The embodiment of the present invention provides an automatic loading and unloading machine for automobile cargo, referring to Figure 1 and Figure 2 , including a planar motion mechanism 1, a lifting mechanism 2, a bearing mechanism 3 and a flipping mechanism 4, the bearing mechanism 3 is used to bear goods, the flipping mechanism 4 is used to vertically flip the components in the bearing mechanism 3, the bearing mechanism 3 is connected to the lifting mechanism 2, the planar motion mechanism 1 is installed on the inner top wall of the vehicle compartment and is used to enable the lifting mechanism 2 and other mechanisms to move arbitrarily in the horizontal direction in the compartment.

[0029] Specifically, the planar motion mechanism 1 includes a longitudinal slide rail 11, a transverse slide rail 12 and a movable mounting frame 13. The longitudinal slide rail 11 is fixedly mounted on the top of the carriage along the length direction of the carriage, and a first mounting frame 14 is slidably mounted on the longitudinal slide rail 11. A first rack 111 is fixedly mounted on the longitudinal slide rail 11 along its own length direction, and a first drive motor 141 is fixedly mounted on the first mounting frame 14. The output shaft of the first drive motor 141 is connected to a gear, and the output shaft of the first drive motor 141 is driven by gear meshing with the first rack 111. Through the forward and reverse motion of the first drive motor 141, the first mounting motor moves bidirectionally on the longitudinal slide rail 11, and the moving distance can be precisely controlled.

[0030] The transverse slide rail 12 is fixedly mounted on the bottom wall of the first mounting frame 14 along the width direction of the carriage, and the mobile mounting frame 13 is slidably mounted on the transverse slide rail 12. A second rack 121 is fixedly mounted on the transverse slide rail 12 along its length direction, and a second drive motor 131 is fixedly mounted on the mobile mounting frame 13. The output shaft of the second drive motor 131 is connected to a gear, and the output shaft of the second drive motor 131 is meshed with the second rack 121 through the gear. The output shaft of the second drive motor 131 is rotated forward and reversely, so that the mobile mounting frame 13 can slide in both directions relative to the first mounting frame 14, and the moving distance can be precisely controlled.

[0031] The lifting mechanism 2 includes a second mounting frame 21, a telescopic sleeve 22 and a first driving assembly. The telescopic sleeve 22 is composed of a plurality of coaxially slidably sleeved sub-pipes. The maximum-size sub-pipe and the minimum-size sub-pipe of the telescopic sleeve 22 are fixedly connected to the mobile mounting frame 13 and the second mounting frame 21, respectively. The telescopic sleeve 22 plays a vertical guiding role on the second mounting frame 21. The first driving assembly is arranged on the mobile mounting frame 13 to drive the second mounting frame 21 to lift vertically. Specifically, the first driving assembly includes a third driving motor 231 and a screw lift 232. The screw of the screw lift 232 is vertically arranged on the mobile mounting frame 13. The base of the screw lift 232 and the third driving motor 231 are both arranged on the second mounting frame 21. The third driving motor 231 is in driving connection with the base of the screw lift 232 . When the third driving motor 231 is started, the base of the screw lift 232 cooperates with the screw, so that the second mounting frame 21 moves relative to the mounting frame 13 to vertically rise and fall.

[0032] Reference Figure 3 and Figure 4 In the embodiment of the present application, the second mounting frame 21 is in the shape of a door. A passage 211 for the passage of goods is provided on the second mounting frame 21 along the length direction of the carriage. The bearing mechanism 3 includes a pair of forks 31 symmetrically mounted on the second mounting frame 21. The two forks 31 are arranged horizontally and parallelly at intervals. The forks 31 at least include a support member with an "L"-shaped cross section. The two forks 31 are respectively located on the inner side walls of the passage 211 on both sides. The "L"-shaped horizontal sections of the fork 31 support member face the inner side of the passage 211, and the two sides of the bottom edge of the goods supported by the two forks 31. The forks 31 are slidably connected in the passage 211 along the length direction of the carriage, so that the forks 31 can be extended to both sides of the second mounting frame 21. Each fork 31 includes two movable sections, which are relatively rotatably connected. The flip mechanism 4 is used to drive the movable section of the fork 31 away from the front of the car to flip upward. A fourth driving motor 212 for driving the fork 31 to move relative to the second mounting frame 21 is disposed in the second mounting frame 21 .

[0033] When loading goods into the compartment, the second mounting frame 21 is first moved to the compartment door at the rear of the vehicle by the planar action mechanism 1, and the fork 31 is moved away from the front of the vehicle. The staff puts the goods on the fork 31 from the side of the second mounting frame 21 away from the front of the vehicle. Under the control of the automatic program, the second mounting frame 21 is raised and moved to the rear of the cargo placement position in the compartment, and the fork 31 on the second mounting frame 21 is lifted to a suitable height. The fork 31 then carries the goods to the side of the second mounting frame 21 close to the front of the vehicle to move the goods to the position where they need to be placed, and then the goods are lowered. When the goods are gradually put into the carriage from the inside to the outside, after the last piece of goods is put down, the fork 31 moves to the side of the second mounting frame 21 away from the front of the vehicle, and the part of the fork 31 extending out of the second mounting frame 21 is turned up by the flip mechanism 4, so that the fork 31 is close to the second mounting frame 21, which effectively reduces the floor space occupied by the fork 31 and the second mounting frame 21 on the horizontal plane, tightens the fork 31 close to the door of the carriage, and increases the effective storage space in the carriage. The goods enter and exit the carriage by the forward and backward movement of the fork 31, and there is no need to rotate the goods, which improves the stability of the goods during loading and unloading, and saves the process of rotating the goods, thereby improving the loading and unloading efficiency.

[0034] Specifically, a sliding part connected to the supporting part is provided on one side of the fork 31, and a slideway adapted to the sliding part of the fork 31 for sliding movement is provided on both sides of the channel 211 on the second mounting frame 21, and the sliding part of the fork 31 is slidably mounted in the sliding part. A third rack 311 is provided on the two movable sections of the two forks 31 along the length direction of the carriage, and a fourth drive motor 212 is provided on the second mounting frame 21, and the fourth drive motor 212 is connected to the third rack 311 on the fork 31 through gear transmission. The output shaft of the fourth drive motor 212 rotates forward and reversely to make the fork 31 move horizontally relative to the second mounting frame 21.

[0035] The two movable sections of each fork 31 are provided with a first limiter below the hinge axis for limiting the two movable sections from turning downward by more than 180°, so that the two movable sections can effectively support the goods when they are kept in a horizontal state. The first limiter includes a first limiter 312 and a second limiter 313 respectively fixed to the bottom walls of the two movable sections of the fork 31, and the second limiter 313 is provided with a limiter groove 314 near the first end of the first limiter 312. When the two movable sections of the fork 31 rotate to be in line, the first limiter 312 cooperates with the inner wall of the limiter groove 314.

[0036] Further, the second mounting frame 21 is provided with a material blocking mechanism 5, which is used to automatically put down the goods after the fork 31 moves the goods to the designated placement position. In the embodiment of the present application, the material blocking mechanism 5 includes a blocking rod 51, a slider 52 is slidably arranged in the vertical direction in the channel 211 of the second mounting frame 21, the blocking rod 51 is arranged in the channel 211 along the width direction of the carriage, both ends of the blocking rod 51 are fixedly connected to the slider 52, and the second mounting frame 21 is provided with a first driving cylinder 53 for driving the slider 52 to vertically rise and fall. When the fork 31 carries the goods and moves toward the front of the vehicle, the first driving cylinder 53 drives the blocking rod 51 to rise to the top of the channel 211, so that the goods can pass through the channel 211 smoothly. When the fork 31 places the goods at the designated position, the first driving cylinder 53 drives the blocking rod 51 to descend to the rear of the goods, and then drives the fork 31 to move toward the rear of the carriage. The blocking rod 51 is used to abut and limit the movement of the goods, so that the goods can be left at the designated position, and the unloading of the goods is completed.

[0037] Furthermore, a sliding layer is provided on the plane of the fork 31 for contacting the cargo, and the sliding layer is a Teflon coating, which can reduce the friction between the cargo and the contact surface of the fork 31, make the cargo unloading smooth, and reduce the wear on the cargo caused by the fork 31 being pulled out from under the cargo.

[0038] In the embodiment of the present application, the flipping mechanism 4 includes a flipping frame 41 and a second driving cylinder 42. The flipping frame 41 is rotatably arranged on the side of the second mounting frame 21 away from the front of the vehicle. The flipping frame 41 is located below the shelf. The cylinder body of the second driving cylinder 42 is rotatably connected to the second mounting frame 21, and the piston rod is rotatably connected to the flipping frame 41. The length of the movable section of the fork 31 close to the front of the vehicle should not be less than the width of the second mounting frame 21. When the fork 31 moves away from the front of the vehicle to the farthest position on the second mounting frame 21, the hinge axis of the two movable sections of the fork 31 should be on the side of the second mounting frame 21 away from the front of the vehicle. When the fork 31 is flipped and tightened, the second driving cylinder 42 drives the flipping frame 41 to rotate upward, and uses the flipping frame 41 to push the movable section of the fork 31 away from the front of the vehicle upward.

[0039] When the cargo is placed on the fork 31, the center of gravity of the cargo is located on the movable section of the fork 31 away from the front of the vehicle. When the fork 31 moves closer to the front of the vehicle, the cargo fork 31 is stable in carrying the cargo through the cooperation between the second mounting frame 21 and the movable section where the cargo is located, and the movable section of the fork 31 close to the front of the vehicle is not subjected to force. However, when the fork 31 moves to a position away from the front of the vehicle, the movable section of the fork 31 close to the front of the vehicle cooperates with the second mounting frame 21, and the other movable section of the fork 31 and the cargo carried are completely subjected to force by the first limiting part, and the stability is not high. In order to ensure that the movable section of the fork 31 away from the front of the vehicle still has a good load-bearing capacity after it is fully extended out of the second mounting frame 21, in the embodiment of the present application, a second limiting part 43 is provided on the side of the second mounting frame 21 away from the front of the vehicle, and the second limiting part 43 is located below the flip frame 41. The second limiting part 43 is used to limit the movable end of the flip frame 41 from rotating downward and perpendicular to the second mounting frame 21 and then continuing to rotate. When the turning frame 41 rotates to a horizontal position, the second limit portion 43 is supported below the turning frame 41 , and the turning frame 41 supports the movable section of the fork 31 away from the vehicle head, ensuring that the fork 31 can stably carry and transport the goods.

[0040] Furthermore, a plurality of supporting rollers 44 are mounted on the turning frame 41 for parallel rotation, and the axes of the supporting rollers 44 are parallel to the width direction of the carriage, and the fork 31 rolls on the supporting rollers 44. The supporting rollers 44 can reduce the friction between the fork 31 and the turning frame 41 during the movement of the goods, so that the fork 31 moves smoothly, and when the turning frame 41 pushes the fork 31 to turn over, the supporting rollers 44 roll with the fork 31, so that the turning process of the fork 31 is smooth.

[0041] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, additional changes and modifications may be made to these embodiments once those skilled in the art are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An automatic loading and unloading machine for automobile cargo, characterized in that: It comprises a planar motion mechanism (1), a lifting mechanism (2), a bearing mechanism (3) and a turning mechanism (4); The planar motion mechanism (1) comprises a longitudinal slide rail (11), a transverse slide rail (12) and a movable mounting frame (13); the longitudinal slide rail (11) is arranged on the top of the carriage along the length direction of the carriage; a first mounting frame (14) is slidably arranged on the longitudinal slide rail (11); the transverse slide rail (12) is arranged on the first mounting frame (14) along the width direction of the carriage; and the movable mounting frame (13) is slidably mounted on the transverse slide rail (12); The lifting mechanism (2) comprises a second mounting frame (21) and a telescopic sleeve (22), wherein the telescopic sleeve (22) is vertically connected to the bottom of the mobile mounting frame (13), and the other end of the telescopic sleeve (22) is connected to the second mounting frame (21), and the mobile mounting frame (13) is provided with a first driving component for driving the second mounting frame (21) to vertically lift and lower; The carrying mechanism (3) comprises a pair of forks (31) symmetrically mounted on the second mounting frame (21), each of the forks (31) comprising two movable sections, the two movable sections being connected to rotate relative to each other, and the turning mechanism (4) is used to drive one movable section of the fork (31) to turn upward; The second mounting frame (21) is in a door shape. A passage (211) for passing goods is provided on the second mounting frame (21) along the length direction of the carriage. A connecting rod (32) is fixedly connected to one end of the two cargo forks (31) away from the front of the vehicle. The two cargo forks (31) are slidably arranged in the passage (211) on the second mounting frame (21) along the length direction of the carriage. A third rack (311) is provided on two movable sections of the two cargo forks (31) along the length direction of the carriage. A fourth driving motor (212) is provided on the second mounting frame (21). The fourth driving motor (212) is gear-connected to the third rack (311) on the cargo forks (31). A first limiting portion for limiting the two movable sections from turning downward by more than 180° is provided on the two movable sections of each cargo fork (31) below the hinge shaft. The second mounting frame (21) is provided with a material blocking mechanism (5), the material blocking mechanism (5) comprising a blocking rod (51), a slider (52) is slidably disposed in a vertical direction in a channel (211) of the second mounting frame (21), the blocking rod (51) is disposed in the channel (211) along a width direction of the carriage, both ends of the blocking rod (51) are fixedly connected to the slider (52), and the second mounting frame (21) is provided with a first driving cylinder (53) for driving the slider (52) to vertically rise and fall; The turning mechanism (4) comprises a turning frame (41) and a second driving cylinder (42); the turning frame (41) is rotatably arranged on a side of the second mounting frame (21) away from the front of the vehicle; the turning frame (41) is located below the shelf; the cylinder body of the second driving cylinder (42) is rotatably connected to the second mounting frame (21); and the piston rod is rotatably connected to the turning frame (41); A second limiting portion (43) is provided on a side of the second mounting frame (21) away from the front of the vehicle. The second limiting portion (43) is located below the flip frame (41). The second limiting portion (43) is used to limit the movable end of the flip frame (41) from rotating downward to be perpendicular to the second mounting frame (21) and then continuing to rotate.

2. The automatic loading and unloading machine for automobile cargo according to claim 1, characterized in that: The longitudinal slide rail (11) is provided with a first rack (111) along its length direction, the first mounting frame (14) is fixedly mounted with a first drive motor (141), and the output shaft of the first drive motor (141) is gear-engaged with the first rack (111) for transmission; A second rack (121) is arranged on the transverse slide rail (12) along its length direction, a second drive motor (131) is fixedly arranged on the movable mounting frame (13), and an output shaft of the second drive motor (131) is meshed with the second rack (121) for transmission.

3. The automatic loading and unloading machine for automobile cargo according to claim 1, characterized in that: The first drive assembly comprises a third drive motor (231) and a screw lift (232), wherein the screw of the screw lift (232) is vertically arranged on the movable mounting frame (13), and the base of the screw lift (232) and the third drive motor (231) are both arranged on the second mounting frame (21).

4. The automatic loading and unloading machine for automobile cargo according to claim 1, characterized in that: The first limiting portion comprises a first limiting piece (312) and a second limiting piece (313) respectively fixed to the bottom walls of the two movable sections of the fork (31); the second limiting piece (313) is provided with a limiting groove (314) close to the first end of the first limiting piece (312); when the two movable sections of the fork (31) rotate to be in line, the first limiting piece (312) cooperates and abuts against the inner wall of the limiting groove (314).

5. The automatic loading and unloading machine for automobile cargo according to claim 1, characterized in that: The flat surface of the cargo fork (31) for contacting cargo is provided with a Teflon coating.

6. The automatic loading and unloading machine for automobile cargo according to claim 1, characterized in that: A plurality of supporting rollers (44) are arranged on the turning frame (41) to rotate in parallel, the axes of the supporting rollers (44) are parallel to the width direction of the carriage, and the fork (31) rolls in contact with the supporting rollers (44).

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