Cargo handling device, truck and loading method

Abstract

The present invention provides a cargo loading and unloading device, a truck, and a loading method, which relate to the technical field of cargo loading and unloading. The cargo loading and unloading device provided by the present invention includes a vehicle body, a support assembly, a folding frame, a load-bearing frame, and a drive assembly; the support assembly is slidably mounted on the bottom of the vehicle body along the direction of travel of the vehicle body; the two ends of the folding frame are respectively rotatably coordinated with the vehicle body and the load-bearing frame, and the load-bearing frame has a load-bearing surface; the drive assembly is connected between the vehicle body and the folding frame, and the drive assembly is configured to drive the folding frame to rotate close to the vehicle body to fold, thereby moving the load-bearing frame downward, and to drive the folding frame to rotate away from the vehicle body to unfold, thereby moving the load-bearing frame upward. The cargo loading and unloading device provided by the present invention does not require a fixed gantry system, and stacking operations can be performed in a cargo compartment of limited height, thereby avoiding accidents of scratching the top of the cargo compartment. The volume is small after folding, thereby improving the utilization rate of the cargo compartment.

Description

Technical Field

[0001] The present invention relates to the technical field of cargo loading and unloading, and in particular to a cargo loading and unloading device, a truck and a loading method. Background Art

[0002] With the rapid development of the logistics industry, trucks, as a crucial means of transporting goods, have become increasingly important. Their loading and unloading efficiency directly impacts the overall efficiency of logistics and transportation. To improve loading and unloading efficiency, tailgates and truck-mounted forklifts, two common auxiliary loading and unloading devices, have been widely used in truck transport.

[0003] According to technical regulations, the permitted load for a tail lift is less than 1 ton for trucks with a gross weight of less than 8 tons, which limits its application. Furthermore, trucks must obtain a tail lift installation permit before installation is permitted, further limiting the popularity and use of tail lifts.

[0004] On the other hand, existing truck-mounted forklifts are mostly built as pallet stackers. Once inside a van, their mast height limits the lifting height of their carrier frame, which can only lift a pallet to within 200mm of the ground. This severely limits their operational capabilities and can easily lead to safety accidents such as the inner mast scraping against the cargo compartment roof. Furthermore, existing stacker-type truck-mounted forklifts cannot perform stacking operations within the cargo compartment, and their large size occupies cargo compartment space, reducing cargo compartment utilization and further impacting logistics and transportation efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a cargo loading and unloading device, a truck and a loading method, which do not require a fixed gantry system and can perform stacking operations in a cargo compartment of limited height, avoiding accidents of scratching the top of the cargo compartment. The device has a small volume after folding, thereby improving the utilization rate of the cargo compartment.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a cargo handling device comprising a vehicle body, a support assembly, a folding frame, a load-bearing frame, and a drive assembly;

[0008] The support assembly is slidably mounted on the bottom of the vehicle body along the traveling direction of the vehicle body;

[0009] The two ends of the folding frame are respectively rotatably matched with the vehicle body and the supporting frame, and the supporting frame has a supporting surface;

[0010] The driving assembly is connected between the vehicle body and the folding frame, and is configured to drive the folding frame to rotate close to the vehicle body to fold, thereby moving the supporting frame downward, and to drive the folding frame to rotate away from the vehicle body to unfold, thereby moving the supporting frame upward.

[0011] In an optional embodiment, the folding frame includes a first folding assembly, a gear frame, and a second folding assembly;

[0012] The first folding assembly is rotatably connected between the vehicle body and the gear rack, both ends of the driving assembly are hinged between the vehicle body and the first folding assembly, and the driving assembly is configured to be retractable;

[0013] The second folding assembly is rotatably connected between the gear frame and the supporting frame, and the second folding assembly is in transmission cooperation with the first folding assembly.

[0014] In an optional embodiment, the gear frame includes a first pin, a second pin, a third pin and a rib;

[0015] The first pin shaft, the second pin shaft and the third pin shaft are arranged relatively parallel to each other, the heights of the first pin shaft, the second pin shaft and the third pin shaft decrease in sequence and are connected by the rib plate;

[0016] The first folding assembly is hinged to the second pin and the third pin;

[0017] The second folding assembly is hinged to the first pin and the third pin.

[0018] In an optional embodiment, the first folding assembly includes an active slewing arm and a lower pull rod;

[0019] One end of the active slewing arm is hinged to the vehicle body, and the other end is hinged to the second pin and engaged with the second folding assembly, and both ends of the lower link are hinged to the vehicle body and the third pin respectively;

[0020] Projected in a direction parallel to the first pin, the lines connecting the hinge point between the active swing arm and the vehicle body, the hinge point between the lower link and the vehicle body, the hinge point between the lower link and the third pin, and the hinge point between the active swing arm and the second pin form a parallelogram;

[0021] The driving assembly is hinged to the active slewing arm.

[0022] In an optional embodiment, the second folding assembly includes a passive swivel arm and an upper pull rod;

[0023] One end of the passive swivel arm is hinged to the first pin and engaged with the first folding assembly, and the other end is hinged to the carrier frame. Both ends of the upper pull rod are hinged to the third pin and the carrier frame respectively.

[0024] Projected in a direction parallel to the first pin, the lines connecting the hinge point between the passive rotating arm and the first pin, the hinge point between the upper pull rod and the third pin, the hinge point between the upper pull rod and the supporting frame, and the hinge point between the passive rotating arm and the supporting frame form a parallelogram.

[0025] In an optional embodiment, the carrier frame is provided with a receiving slot, and the receiving slot is configured to receive the supporting assembly when the folding frame is in a folded state.

[0026] In an optional embodiment, the vehicle body includes a base and a main wheel body, the base has a slide groove that slides with the support assembly, and a locking structure is provided between the base and the support assembly for locking or unlocking the position of the support assembly relative to the base, and the main wheel body is connected to the vehicle body.

[0027] In an optional embodiment, the support assembly includes a first leg and a second leg, and the first leg and the second leg are both slidingly engaged with the support assembly along the traveling direction of the vehicle body. The first leg is provided with a first load-bearing wheel at the front end along the traveling direction of the vehicle body, and the second leg is provided with a second load-bearing wheel at the front end along the traveling direction of the vehicle body.

[0028] In a second aspect, the present invention provides a truck comprising a vehicle body and a cargo loading and unloading device as described in any one of the aforementioned embodiments, wherein the cargo loading and unloading device is installed at the bottom of the vehicle body.

[0029] In a third aspect, the present invention provides a loading method using the cargo loading and unloading device according to any one of the aforementioned embodiments, comprising:

[0030] The driving assembly drives the folding frame to rotate away from the vehicle body to unfold;

[0031] The carrier extends into the truck;

[0032] The driving assembly drives the folding frame to rotate close to the vehicle body to fold, and after the carrying frame contacts the bottom surface of the cargo box of the truck, the folding frame drives the vehicle body off the ground;

[0033] Pulling the support assembly away from the truck;

[0034] After the folding frame is folded, the support assembly is reset and the cargo loading and unloading device is pushed into the cargo box to stack the cargo.

[0035] The cargo loading and unloading device, truck, and loading method provided by the present invention can produce the following beneficial effects:

[0036] Compared with the prior art, the cargo loading and unloading device provided in the first aspect of the present invention does not require a fixed gantry system, and stacking operations can be performed in a cargo compartment of limited height, avoiding accidents of scratching the top of the cargo compartment. Moreover, after folding, the volume is small, and the space occupied in the cargo compartment is small, thereby improving the utilization rate of the cargo compartment.

[0037] The truck provided in the second aspect of the present invention has the cargo loading and unloading device provided in the first aspect of the present invention, thereby having all the beneficial effects of the cargo loading and unloading device provided in the first aspect of the present invention.

[0038] In the loading method provided in the third aspect of the present invention, the cargo loading and unloading device can realize its own transfer into the cargo box according to the weight of the cargo, without the need for other auxiliary tools, and can also realize the stacking of cargo in the cargo box, saving time and labor and improving logistics transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the three-dimensional structure of a cargo loading and unloading device provided by an embodiment of the present invention when the folding frame is unfolded, viewed from a first perspective;

[0041] Figure 2 for Figure 1 A local enlarged schematic diagram of point A;

[0042] Figure 3 A side view of a cargo loading and unloading device with a folding frame unfolded provided by an embodiment of the present invention;

[0043] Figure 4 A side view of a cargo loading and unloading device with a foldable frame provided by an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the three-dimensional structure of an active slewing arm provided in an embodiment of the present invention;

[0045] Figure 6 A schematic diagram of the three-dimensional structure of a passive slewing arm provided in an embodiment of the present invention;

[0046] Figure 7 A schematic diagram of the three-dimensional structure of a cargo loading and unloading device provided by an embodiment of the present invention when the folding frame is unfolded, viewed from a second perspective;

[0047] Figure 8A schematic diagram of the three-dimensional structure of a cargo loading and unloading device when a folding frame is folded, provided by an embodiment of the present invention;

[0048] Figure 9 A schematic diagram of a three-dimensional structure of a support assembly provided in an embodiment of the present invention;

[0049] Figure 10 A side view of a truck provided by an embodiment of the present invention;

[0050] Figure 11 A schematic diagram of step 1 of a loading method provided in an embodiment of the present invention;

[0051] Figure 12 A schematic diagram of step 2 of a loading method provided in an embodiment of the present invention;

[0052] Figure 13 A schematic diagram of step three of a loading method provided in an embodiment of the present invention;

[0053] Figure 14 A schematic diagram of step 4 of a loading method provided in an embodiment of the present invention;

[0054] Figure 15 A schematic diagram of step five of a loading method provided in an embodiment of the present invention;

[0055] Figure 16 Schematic diagram of step 6 of a loading method provided in an embodiment of the present invention Figure 1 ;

[0056] Figure 17 Schematic diagram of step 6 of a loading method provided in an embodiment of the present invention Figure 2 ;

[0057] Figure 18 A schematic diagram of step seven of a loading method provided in an embodiment of the present invention.

[0058] Icons: 1-body; 11-base; 111-slide; 1111-avoidance; 112-through hole; 12-main wheel body; 2-support assembly; 21-first leg; 211-first load-bearing wheel; 212-first auxiliary wheel body; 22-second leg; 221-second load-bearing wheel; 222-second auxiliary wheel body; 3-folding frame; 31-first folding assembly; 311-active slewing arm; 3111-active arm body; 3112-active gear; 3113-articulated seat; 312-down rod ;32-gear rack;321-first pin;322-second pin;323-third pin;324-rib;325-end plate;33-second folding assembly;331-passive rotary arm;3311-passive arm body;3312-passive gear;332-upper pull rod;4-carrying frame;41-accommodating groove;42-frame body;43-first support arm;44-second support arm;45-rear end face;5-drive assembly;51-hydraulic cylinder;52-hydraulic power source;6-vehicle body;7-battery. DETAILED DESCRIPTION

[0059] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0060] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0062] The following describes the specific embodiments of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0063] The embodiment of the first aspect of the present invention is to provide a cargo handling device, such as Figure 1 and Figure 2 As shown, it includes a vehicle body 1, a support assembly 2, a folding frame 3, a carrier frame 4 and a drive assembly 5;

[0064] The support assembly 2 is slidably mounted on the bottom of the vehicle body 1 along the travel direction of the vehicle body 1;

[0065] The two ends of the folding frame 3 are respectively rotatably matched with the vehicle body 1 and the supporting frame 4, and the supporting frame 4 has a bearing surface;

[0066] The driving assembly 5 is connected between the vehicle body 1 and the folding frame 3. The driving assembly 5 is configured to drive the folding frame 3 to rotate close to the vehicle body 1 to fold, thereby moving the carrier 4 downward, and to drive the folding frame 3 to rotate away from the vehicle body 1 to unfold, thereby moving the carrier 4 upward.

[0067] When the cargo loading and unloading device provided by the embodiment of the first aspect of the present invention is in use, the cargo can be placed on the load-bearing surface, and the driving component 5 drives the folding frame 3 to rotate in the direction away from the vehicle body 1 to unfold the folding frame 3, and the load-bearing frame 4 moves up to lift the cargo; then the forklift or truck is moved so that the load-bearing frame 4 and the cargo on it enter the cargo box; then the driving component 5 drives the folding frame 3 to rotate in the direction close to the vehicle body 1, so that the folding frame 3 is folded, and the load-bearing frame 4 contacts the bottom surface of the cargo box. As the folding frame 3 is further folded, the folding frame 3 drives the vehicle body 1 off the ground; then the support component 2 is pulled out in the direction away from the vehicle body 6 to avoid interference between the support component 2 and the structure at the bottom of the vehicle body 6. After the folding frame 3 is folded, the support component 2 is reset; then the cargo loading and unloading device is moved and the folding frame 3 is driven to unfold by the driving component 5 to realize stacking of cargo in the cargo box.

[0068] The cargo loading and unloading device provided by the embodiment of the first aspect of the present invention does not require a fixed gantry system, and stacking operations can be performed in a cargo compartment of limited height, avoiding accidents of scratching the top of the cargo compartment. After folding, the volume is small, thereby improving the utilization rate of the cargo compartment.

[0069] It should be noted that any structure that can be rotated and folded close to the vehicle body 1 to achieve the downward movement of the carrier 4 and rotated and unfolded away from the vehicle body 1 to achieve the upward movement of the carrier 4 under the drive of the driving component 5 can be the folding frame 3 mentioned in the above embodiment.

[0070] In an optional embodiment, the folding frame 3 may include a scissor-type lifting frame, and the lifting of the scissor-type lifting frame drives the supporting frame 4 to be lifted or lowered.

[0071] In other optional embodiments, such as Figure 1 and Figure 2 As shown, the folding frame 3 includes a first folding component 31, a gear frame 32 and a second folding component 33; the first folding component 31 is rotatably connected between the vehicle body 1 and the gear frame 32, and both ends of the driving component 5 are hinged between the vehicle body 1 and the first folding component 31, and the driving component 5 is configured to be retractable; the second folding component 33 is rotatably connected between the gear frame 32 and the supporting frame 4, and the second folding component 33 is transmission-coordinated with the first folding component 31.

[0072] like Figure 3 As shown, when the driving assembly 5 is extended, it can drive the first folding assembly 31 to rotate counterclockwise away from the vehicle body 1. Since the second folding assembly 33 is in transmission cooperation with the first folding assembly 31, the first folding assembly 31 can synchronously drive the second folding assembly 33 to rotate relative to the gear rack 32. Driven by the first folding assembly 31 and the second folding assembly 33, the carrier 4 moves upward. Figure 4 As shown, when the driving component 5 is shortened, it can drive the first folding component 31 to rotate clockwise close to the vehicle body 1. The first folding component 31 can synchronously drive the second folding component 33 to rotate relative to the gear rack 32. Driven by the first folding component 31 and the second folding component 33, the supporting frame 4 moves downward.

[0073] The advantage of the above-mentioned folding frame 3 is that the second folding component 33 can be rotatably connected to the side of the supporting frame 4 without being rotatably connected to the bottom wall of the supporting frame 4. In this way, the supporting frame 4 can be more fully extended into the cargo box and completely placed on the bottom surface of the cargo box after the first folding component 31 and the second folding component 33 are folded, thereby ensuring the stability of the folding frame 3 during the folding process off the ground.

[0074] Continue to refer Figure 4 When the first folding component 31 and the second folding component 33 are fully folded, the bottom surface of the load-bearing frame 4 is not higher than the bottom surface of the support component 2, so that when the load-bearing frame 4 carries the goods and contacts the bottom surface of the cargo box, the support component 2 can gradually return to the top of the bottom surface of the cargo box during the resetting process, without the user applying external force to lift the entire device. In the subsequent process of the driving component 5 driving the folding frame 3 to unfold, the support component 2 can support the device.

[0075] Continue to refer Figure 4During the resetting process of the support assembly 2, the top surface of the support assembly 2 can be higher than or lower than the load-bearing surface of the carrier 4. When the top surface of the support assembly 2 is higher than the load-bearing surface of the carrier 4, the bottom surface of the pallet on the carrier 4 can be provided with a recessed groove to avoid the support assembly 2, thereby preventing interference between the support assembly 2 and the pallet during the resetting process; when the top surface of the support assembly 2 is lower than the load-bearing surface of the carrier 4, the cargo can also be placed directly on the carrier 4.

[0076] It should be noted that goods are usually placed on the load surface via pallets.

[0077] In an alternative embodiment, if Figure 2 As shown, the gear frame 32 includes a first pin 321, a second pin 322, a third pin 323 and a rib 324; the first pin 321, the second pin 322 and the third pin 323 are arranged relatively parallel to each other, and the heights of the first pin 321, the second pin 322 and the third pin 323 are successively reduced and connected by the rib 324; the first folding component 31 is hinged to the second pin 322 and the third pin 323; the second folding component 33 is hinged to the first pin 321 and the third pin 323.

[0078] In the gear frame 32, the ribs 324 connect the first, second, and third pins 321, 322, and 323, ensuring the stability of the relative positions of the first, second, and third pins 321, 322, and 323. The arrangement of the first, second, and third pins 321, 322, and 323 provides a hinge point for the first and second folding assemblies 31, 33, and ensures more stable transmission coordination between the second and first folding assemblies 33 and 31, making the folding and unfolding of the folding frame 3 more secure and reliable.

[0079] Specifically, the ribs 324 may be configured in plurality, and the plurality of ribs 324 are arranged at intervals along the extending direction of the first pin shaft 321 .

[0080] In an alternative embodiment, if Figure 2 As shown, the gear frame 32 further includes end plates 325 on both sides of the gear frame 32 , the end plates 325 are connected between the first pin shaft 321 and the second pin shaft 322 , and the ribs 324 are distributed between the two end plates 325 .

[0081] In an alternative embodiment, if Figure 3As shown, the first folding component 31 includes an active rotating arm 311 and a lower pull rod 312; one end of the active rotating arm 311 is hinged to the vehicle body 1, and the other end is hinged to the second pin 322 and meshed with the second folding component 33, and the two ends of the lower pull rod 312 are hinged to the vehicle body 1 and the third pin 323 respectively; along the direction of extension of the first pin 321, the cross-section of the first pin 321 is projected, and the hinge point of the active rotating arm 311 and the vehicle body 1, the hinge point of the lower pull rod 312 and the vehicle body 1, the hinge point of the lower pull rod 312 and the third pin 323, and the hinge point of the active rotating arm 311 and the second pin 322 are connected to each other to form a parallelogram; the driving component 5 is hinged to the active rotating arm 311.

[0082] It can be understood that the cross section of the first pin shaft 321 is perpendicular to the extension direction of the first pin shaft 321 .

[0083] In the above embodiment, if Figure 3 As shown, when the drive assembly 5 extends, it drives the active swivel arm 311 to rotate counterclockwise relative to the vehicle body 1, simultaneously driving the second pin 322 to lift. The second pin 322 then drives the third pin 323 to lift via the rib 324, causing the lower link 312 to rotate counterclockwise accordingly. During this process, the active swivel arm 311 remains parallel to the lower link 312. Projected along a direction parallel to the first pin 321, the lines connecting the hinge points of the active swivel arm 311 and the vehicle body 1 and the hinge points of the lower link 312 and the vehicle body 1 are parallel to the lines connecting the hinge points of the active swivel arm 311 and the second pin 322 and the hinge points of the lower link 312 and the third pin 323. The setting angle of the gear rack 32 relative to the ground does not change. Because the active pivot arm 311 is engaged with the second folding assembly 33, the rotation of the active pivot arm 311 relative to the second pin 322 drives the second folding assembly 33 to rotate clockwise relative to the gear rack 32, thereby lifting the support frame 4. When the drive assembly 5 is shortened, the operating principle of the first folding assembly 31 is similar to the above process and will not be described in detail here to save space.

[0084] In the above embodiment, the setting angle of the gear rack 32 relative to the ground can remain unchanged, that is, the angle of the plane where the axis of the first pin shaft 321 and the axis of the second pin shaft 322 are located relative to the ground remains unchanged, and the angle of the plane where the axis of the second pin shaft 322 and the axis of the third pin shaft 323 are located relative to the ground remains unchanged, ensuring that the gear rack 32 will not tilt during the lifting process.

[0085] In an optional embodiment, if Figure 5As shown, the active rotating arm 311 includes an active arm body 3111 and a driving gear 3112. The two ends of the active arm body 3111 are respectively hinged to the vehicle body 1 and the second pin shaft 322. The driving gear 3112 is fixed to the active arm body 3111 by multiple bolts, and the driving gear 3112 is engaged with the second folding component 33.

[0086] The outer side surface of the active arm body 3111 is connected to a hinge seat 3113 , and the driving assembly 5 is rotatably matched with the active rotary arm 311 through the hinge seat 3113 .

[0087] In an alternative embodiment, if Figure 3 As shown, the second folding component 33 includes a passive rotating arm 331 and an upper pull rod 332; one end of the passive rotating arm 331 is hinged to the first pin 321 and meshed with the first folding component 31, and the other end is hinged to the support frame 4, and the two ends of the upper pull rod 332 are respectively hinged to the third pin 323 and the support frame 4; along the direction of extension of the first pin 321, the cross-section of the first pin 321 is projected, and the hinge point of the passive rotating arm 331 and the first pin 321, the hinge point of the upper pull rod 332 and the third pin 323, the hinge point of the upper pull rod 332 and the support frame 4, and the hinge point of the passive rotating arm 331 and the support frame 4 are connected to form a parallelogram.

[0088] In the above embodiment, if Figure 3 As shown, when the driving assembly 5 is extended, the active swivel arm 311 drives the second pin 322 to rise, and at the same time, the active swivel arm 311 rotates counterclockwise relative to the second pin 322, so that the second pin 322 drives the first pin 321 to rise via the rib 324, and the active swivel arm 311 drives the passive swivel arm 331 to rotate clockwise relative to the first pin 321. During this process, the passive swivel arm 331 is always parallel to the upper rod 332. Projected in a direction parallel to the first pin 321, the line connecting the hinge point between the passive swivel arm 331 and the first pin 321 and the upper rod 332 and the third pin 323 is parallel to the hinge point between the passive swivel arm 331 and the support frame 4 and the line connecting the hinge point between the upper rod 332 and the support frame 4.

[0089] In the above embodiment, by projecting in a direction parallel to the first pin axis 321, the angle of the line between the hinge point of the passive rotating arm 331 and the load-bearing frame 4 and the hinge point of the upper pull rod 332 and the load-bearing frame 4 relative to the ground remains unchanged, ensuring that the load-bearing surface of the load-bearing frame 4 is always parallel to the horizontal plane during the lifting process, thereby ensuring stable lifting of the goods.

[0090] In an optional embodiment, if Figure 6As shown, the passive rotating arm 331 includes a passive arm body 3311 and a passive gear 3312. The two ends of the passive arm body 3311 are hinged to the carrier frame 4 and the first pin shaft 321 respectively. The passive gear 3312 is fixed to the passive arm body 3311 by multiple bolts, and the passive gear 3312 is engaged with the driving gear 3112.

[0091] Based on the above embodiment, the first folding component 31 and the second folding component 33 can be configured as one or multiple. To ensure the stability of the folding frame 3, the first folding component 31 and the second folding component 33 are configured as multiple.

[0092] by Figure 7 For example, two first folding assemblies 31 and two second folding assemblies 33 are each configured, with the two first folding assemblies 31 being arranged horizontally relative to each other along a direction perpendicular to the travel direction of the vehicle body 1, and the two second folding assemblies 33 being arranged horizontally relative to each other along a direction perpendicular to the travel direction of the vehicle body 1. Correspondingly, in the gear rack 32, a first pin 321 between one end plate 325 and an adjacent rib plate 324 is hingedly connected to a passive pivot arm 331, and a second pin 322 between the end plate and the adjacent rib plate 324 is hingedly connected to a lower link 312; a first pin 321 between the other end plate 325 and an adjacent rib plate 324 is hingedly connected to another passive pivot arm 331, and a second pin 322 between the end plate and the adjacent rib plate 324 is hingedly connected to another lower link 312.

[0093] In an alternative embodiment, if Figure 7 and Figure 8 As shown, the carrier frame 4 is provided with a receiving groove 41 , and the receiving groove 41 is configured to receive the supporting assembly 2 when the folding frame 3 is in a folded state.

[0094] The arrangement of the receiving groove 41 allows the support assembly 2 to directly extend into the receiving groove 41 when the support assembly 2 is reset, and the carrier 4 will not interfere with the support assembly 2, while also making the structure of the cargo loading and unloading device more compact.

[0095] Specifically, if Figure 8 As shown, the carrier frame 4 includes a frame body 42, a first support arm 43 and a second support arm 44. The first support arm 43 and the second support arm 44 are both connected to the frame body 42 and are horizontally spaced apart along a direction of travel perpendicular to the vehicle body 1. The first support arm 43 and the second support arm 44 are both provided with a receiving groove 41.

[0096] In an alternative embodiment, if Figure 7As shown, the vehicle body 1 includes a base 11 and a main wheel body 12. The base 11 has a slide groove 111 that slides with the support assembly 2. A locking structure is provided between the base 11 and the support assembly 2 for locking or unlocking the position of the support assembly 2 relative to the base 11. The main wheel body 12 is connected to the vehicle body 1.

[0097] When in use, the support component 2 can slide relative to the slide groove 111 along the moving direction of the vehicle body 1. For example, when the support component 2 is needed to achieve a supporting function, the support component 2 is pushed forward along the moving direction of the vehicle body 1, and then the position of the support component 2 is locked using the locking structure. When the support component 2 is needed to avoid the structure at the bottom of the vehicle body 6, the support component 2 is pushed backward along the moving direction of the vehicle body 1.

[0098] Among them, the locking structure can adopt a spring pin, which can be directly purchased from outside; or the locking structure can include a buckle and a slot, the slide groove 111 is recessed with multiple slots along the moving direction of the vehicle body 1, and the support component 2 is provided with a buckle that can be snapped into any slot, and so on.

[0099] Specifically, two sides of the base 11 are provided with slide grooves 111, such as Figure 7 As shown, a through hole 112 is defined in the middle of the base 11 , and the main wheel 12 extends from the through hole 112 to the bottom of the base 11 .

[0100] It should be noted that any structure that can drive the folding frame 3 to rotate relative to the vehicle body 1 can be the driving component 5 mentioned in the above embodiment. The driving component 5 can include a motor, or the driving component 5 can include a retractable structure such as a pneumatic cylinder or a hydraulic cylinder.

[0101] In an alternative embodiment, if Figure 3 As shown, the drive assembly 5 includes a hydraulic cylinder 51 and a hydraulic power source 52. The cylinder body of the hydraulic cylinder 51 is hinged to the base 11, the piston rod in the hydraulic cylinder 51 is hinged to the active rotary arm 311, and the hydraulic power source 52 is installed on the base 11 and connected to the hydraulic cylinder 51 to provide hydraulic oil for the hydraulic cylinder 51.

[0102] In an alternative embodiment, the cargo handling apparatus further comprises a battery 7 for providing electrical power to the hydraulic power source 52 .

[0103] In an alternative embodiment, if Figure 9 As shown, the support assembly 2 includes a first leg 21 and a second leg 22. The first leg 21 and the second leg 22 are both slidably matched with the support assembly 2 along the moving direction of the vehicle body 1. The front end of the first leg 21 along the moving direction of the vehicle body 1 is provided with a first load-bearing wheel 211, and the front end of the second leg 22 along the moving direction of the vehicle body 1 is provided with a second load-bearing wheel 221.

[0104] The first load-bearing wheel 211 and the second load-bearing wheel 221 can cooperate with the main wheel body 12 to realize the support and movement functions of the cargo loading and unloading device.

[0105] In an alternative embodiment, if Figure 9 As shown, the first leg 21 is further provided with a first auxiliary wheel body 212, and the second leg 22 is further provided with a second auxiliary wheel body 222. The first auxiliary wheel body 212 and the second auxiliary wheel body 222 function as follows: Figure 15 and Figure 16 As shown, the carrier 4 contacts the bottom surface of the cargo compartment, and the first leg 21 and the second leg 22 are lifted up, and can slide freely in the vehicle body 1. When the first leg 21 and the second leg 22 are retracted into place, the main wheel body 12 is in a suspended state outside the cargo compartment. As the hydraulic cylinder in the drive assembly 5 rises, the carrier 4 is out of contact with the bottom surface of the cargo compartment, and the first load-bearing wheel 211, the second load-bearing wheel 221, the first auxiliary wheel body 212 and the second auxiliary wheel body 222 are in contact with the bottom surface of the cargo compartment, forming a trolley structure supported by two legs. After the cargo loading and unloading device is pushed until the main wheel body 12 enters the cargo compartment and contacts the bottom surface of the cargo compartment, the first auxiliary wheel body 212 and the second auxiliary wheel body 222 are lifted up and out of contact with the bottom surface of the cargo compartment, and the cargo loading and unloading device is now supported by the first load-bearing wheel 211, the second load-bearing wheel 221 and the main wheel body 12.

[0106] That is, when the device is placed on a horizontal surface, the bottom of the main wheel body 12 is lower than the bottom of the first auxiliary wheel body 212 and the second auxiliary wheel body 222. At the same time, the bottom of the first load-bearing wheel 211 and the second load-bearing wheel 221 is lower than the bottom of the first auxiliary wheel body 212 and the second auxiliary wheel body 222. Only in this way can the first auxiliary wheel body 212 and the second auxiliary wheel body 222 in the middle be emptied.

[0107] To prevent the first supporting leg 21 and the second supporting leg 22 from sliding relative to the vehicle body 1, the vehicle body 1 may cause obstruction to the first auxiliary wheel body 212 and the second auxiliary wheel body 222. Figure 7 As shown, the bottom end of the slide groove 111 has an escape opening 1111. When the first leg 21 and the second leg 22 are pushed backward along the direction of travel of the vehicle body 1, the first auxiliary wheel body 212 and the second auxiliary wheel body 222 can enter the escape opening 1111, thereby not hindering the first leg 21 and the second leg 22 from continuing to slide backward.

[0108] The embodiment of the second aspect of the present invention is to provide a truck, such as Figure 10 As shown, the truck provided by the embodiment of the second aspect of the present invention includes a vehicle body 6 and the above-mentioned cargo loading and unloading device, and the cargo loading and unloading device is installed at the bottom of the vehicle body 6.

[0109] According to an embodiment of the second aspect of the present invention, in a truck, a cargo loading and unloading device can be installed at the bottom of the truck body 6 without occupying cargo compartment space.

[0110] The cargo handling device and the vehicle body 6 can be connected by means of a clamping connection, a bolt connection or the like.

[0111] An embodiment of a third aspect of the present invention provides a loading method. The loading method provided by the embodiment of the third aspect of the present invention uses the above-mentioned cargo loading and unloading device, comprising:

[0112] The driving assembly 5 drives the folding frame 3 to rotate and unfold away from the vehicle body 1;

[0113] The carrier 4 extends into the truck;

[0114] The driving assembly 5 drives the folding frame 3 to rotate close to the vehicle body 1 and fold. After the supporting frame 4 contacts the bottom surface of the cargo box of the truck, the folding frame 3 drives the vehicle body 1 off the ground.

[0115] Pull the support assembly 2 away from the truck;

[0116] After the folding frame 3 is folded, the support assembly 2 is reset and the cargo loading and unloading device is pushed into the cargo box to stack the cargo.

[0117] In the loading method provided by the embodiment of the third aspect of the present invention, a counterweight block is provided at the end of the carrier frame 4 of the cargo loading and unloading device, and the cargo loading and unloading device can transfer itself into the cargo box to perform cargo unloading operations without using other auxiliary tools.

[0118] The following is based on Figures 11 to 18 The above loading method is described in detail:

[0119] In step one, if Figure 11 As shown, first align the cargo loading and unloading device with the cargo box of the truck; in step 2, as shown Figure 12 As shown, the driving assembly 5 then drives the folding frame 3 to rotate and unfold away from the vehicle body 1, and the carrier 4 lifts the pallet to a level 100 mm above the bottom surface of the cargo box and then stops; in step three, as shown Figure 13 As shown, the cargo handling device moves forward until the carrier 4 extends into the truck; in step 4, as shown in FIG. Figure 14 As shown, the driving assembly 5 drives the folding frame 3 to rotate and fold close to the vehicle body 1, and the supporting frame 4 falls to the bottom of the cargo compartment and continues to fall until the vehicle body 1 is 300mm off the ground and stops, and the supporting assembly 2 is pulled out backward; in step five, as shown in FIG. Figure 15 As shown, the folding frame 3 is fully folded, the support assembly 2 is pushed forward to reset and lock the position of the support assembly 2; in step six, as shown in FIG. Figure 16 and Figure 17As shown, the folding frame 3 is unfolded until the carrier frame 4 is raised to 200 mm from the bottom of the cargo compartment, and the cargo loading and unloading device moves forward into the cargo compartment; in step seven, as shown in FIG. Figure 18 As shown, stacking operation is carried out.

[0120] It should be noted that the order of disembarking the forklift can be reversed.

[0121] Before aligning the cargo loading and unloading device with the cargo box of the truck, the steps specifically include:

[0122] Place the goods on pallets that meet international and domestic standards, ensure that the goods are stacked neatly without uneven loading, and that the ground at the loading location is solid, flat, and without slopes.

[0123] Among them, first align the cargo loading and unloading device with the cargo box of the truck, specifically including:

[0124] The cargo loading and unloading device moves the pallet to the loading point and adjusts its position. At this time, the horizontal distance between the end of the load frame 4 and the end face of the rear end of the cargo box is 100 mm. The pallet spans the load frame 4, and the side of the pallet is basically parallel to the side of the cargo box.

[0125] Among them, when the cargo loading and unloading device moves forward to the carrier 4 extending into the truck, the cargo loading and unloading device moves forward to the rear end face 45 of the carrier 4 being 30 mm away from the rear end face of the cargo box and then stops. At this time, the rear end face 45 of the carrier 4 has not yet entered the cargo box.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cargo handling device, characterized in that: It comprises a vehicle body (1), a support assembly (2), a folding frame (3), a carrying frame (4) and a driving assembly (5); The support assembly (2) is slidably mounted on the bottom of the vehicle body (1) along the travel direction of the vehicle body (1); The two ends of the folding frame (3) are respectively rotatably matched with the vehicle body (1) and the supporting frame (4), and the supporting frame (4) has a supporting surface; The driving assembly (5) is connected between the vehicle body (1) and the folding frame (3), and the driving assembly (5) is configured to drive the folding frame (3) to rotate close to the vehicle body (1) to fold, thereby moving the carrier frame (4) downward, and to drive the folding frame (3) to rotate away from the vehicle body (1) to unfold, thereby moving the carrier frame (4) upward; The folding frame (3) comprises a first folding assembly (31), a gear frame (32) and a second folding assembly (33); The first folding assembly (31) is rotatably connected between the vehicle body (1) and the gear rack (32), and both ends of the driving assembly (5) are hinged between the vehicle body (1) and the first folding assembly (31), and the driving assembly (5) is configured to be retractable; The second folding assembly (33) is rotatably connected between the gear frame (32) and the carrier frame (4), and the second folding assembly (33) is in transmission cooperation with the first folding assembly (31); The gear frame (32) includes a first pin (321), a second pin (322), a third pin (323) and a rib (324); The first pin shaft (321), the second pin shaft (322), and the third pin shaft (323) are arranged relatively parallel to each other, and the heights of the first pin shaft (321), the second pin shaft (322), and the third pin shaft (323) are successively reduced and connected via the rib plate (324); The first folding assembly (31) comprises an active rotating arm (311) and a lower pull rod (312); One end of the active slewing arm (311) is hinged to the vehicle body (1), and the other end is hinged to the second pin (322) and meshed with the second folding assembly (33); both ends of the lower pull rod (312) are hinged to the vehicle body (1) and the third pin (323), respectively; The second folding assembly (33) comprises a passive rotating arm (331) and an upper pull rod (332); One end of the passive rotating arm (331) is hinged to the first pin (321) and meshed with the first folding assembly (31), and the other end is hinged to the carrier (4); both ends of the upper pull rod (332) are hinged to the third pin (323) and the carrier (4), respectively; Projected in a direction parallel to the first pin (321), the hinge point between the passive swivel arm (331) and the first pin (321), the hinge point between the upper pull rod (332) and the third pin (323), the hinge point between the upper pull rod (332) and the support frame (4), and the hinge point between the passive swivel arm (331) and the support frame (4) are connected to form a parallelogram.

2. The cargo handling device according to claim 1, characterized in that: Projected in a direction parallel to the first pin (321), the hinge point between the active slewing arm (311) and the vehicle body (1), the hinge point between the lower pull rod (312) and the vehicle body (1), the hinge point between the lower pull rod (312) and the third pin (323), and the hinge point between the active slewing arm (311) and the second pin (322) form a parallelogram; The driving assembly (5) is hinged to the active rotary arm (311).

3. The cargo handling device according to claim 1, characterized in that: The carrier frame (4) is provided with a receiving groove (41), and the receiving groove (41) is configured to receive the supporting assembly (2) when the folding frame (3) is in a folded state.

4. The cargo handling device according to claim 1, characterized in that: The vehicle body (1) comprises a base (11) and a main wheel body (12); the base (11) has a slide groove (111) that is slidably engaged with the support assembly (2); a locking structure for locking or unlocking the position of the support assembly (2) relative to the base (11) is provided between the base (11) and the support assembly (2); and the main wheel body (12) is connected to the vehicle body (1).

5. The cargo handling device according to claim 1, characterized in that: The support assembly (2) comprises a first support leg (21) and a second support leg (22), wherein the first support leg (21) and the second support leg (22) are both slidably engaged with the support assembly (2) along the travel direction of the vehicle body (1), the first support leg (21) is provided with a first load-bearing wheel (211) at the front end thereof along the travel direction of the vehicle body (1), and the second support leg (22) is provided with a second load-bearing wheel (221) at the front end thereof along the travel direction of the vehicle body (1).

6. A truck, characterized in that: It comprises a vehicle body (6) and a cargo handling device according to any one of claims 1 to 5, wherein the cargo handling device is installed at the bottom of the vehicle body (6).

7. A method for loading cargo using the cargo loading and unloading device according to any one of claims 1 to 5, characterized in that: include: The driving assembly (5) drives the folding frame (3) to rotate away from the vehicle body (1) to unfold; The carrier (4) extends into the truck; The driving assembly (5) drives the folding frame (3) to rotate close to the vehicle body (1) for folding, and after the supporting frame (4) contacts the bottom surface of the cargo box of the truck, the folding frame (3) drives the vehicle body (1) off the ground; Pulling the support assembly (2) away from the truck; After the folding frame (3) is folded, the support assembly (2) is reset, and the cargo loading and unloading device is pushed into the cargo box to stack the cargo.

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